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 "ieee80211_i.h"
20 #include "debugfs_netdev.h"
23 #include "driver-ops.h"
26 * DOC: Interface list locking
28 * The interface list in each struct ieee80211_local is protected
31 * (1) modifications may only be done under the RTNL
32 * (2) modifications and readers are protected against each other by
34 * (3) modifications are done in an RCU manner so atomic readers
35 * can traverse the list in RCU-safe blocks.
37 * As a consequence, reads (traversals) of the list can be protected
38 * by either the RTNL, the iflist_mtx or RCU.
42 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
45 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
47 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
49 /* FIX: what would be proper limits for MTU?
50 * This interface uses 802.3 frames. */
52 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
56 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
57 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
58 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
63 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
65 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
68 if (ieee80211_sdata_running(sdata
))
71 ret
= eth_mac_addr(dev
, addr
);
74 memcpy(sdata
->vif
.addr
, addr
, ETH_ALEN
);
79 static inline int identical_mac_addr_allowed(int type1
, int type2
)
81 return type1
== NL80211_IFTYPE_MONITOR
||
82 type2
== NL80211_IFTYPE_MONITOR
||
83 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
84 (type1
== NL80211_IFTYPE_WDS
&&
85 (type2
== NL80211_IFTYPE_WDS
||
86 type2
== NL80211_IFTYPE_AP
)) ||
87 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
88 (type1
== NL80211_IFTYPE_AP_VLAN
&&
89 (type2
== NL80211_IFTYPE_AP
||
90 type2
== NL80211_IFTYPE_AP_VLAN
));
93 static int ieee80211_open(struct net_device
*dev
)
95 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
96 struct ieee80211_sub_if_data
*nsdata
;
97 struct ieee80211_local
*local
= sdata
->local
;
99 struct ieee80211_if_init_conf conf
;
102 u32 hw_reconf_flags
= 0;
103 u8 null_addr
[ETH_ALEN
] = {0};
105 /* fail early if user set an invalid address */
106 if (compare_ether_addr(dev
->dev_addr
, null_addr
) &&
107 !is_valid_ether_addr(dev
->dev_addr
))
108 return -EADDRNOTAVAIL
;
110 /* we hold the RTNL here so can safely walk the list */
111 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
112 struct net_device
*ndev
= nsdata
->dev
;
114 if (ndev
!= dev
&& ieee80211_sdata_running(nsdata
)) {
116 * Allow only a single IBSS interface to be up at any
117 * time. This is restricted because beacon distribution
118 * cannot work properly if both are in the same IBSS.
120 * To remove this restriction we'd have to disallow them
121 * from setting the same SSID on different IBSS interfaces
122 * belonging to the same hardware. Then, however, we're
123 * faced with having to adopt two different TSF timers...
125 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
126 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
130 * The remaining checks are only performed for interfaces
131 * with the same MAC address.
133 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
137 * check whether it may have the same address
139 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
144 * can only add VLANs to enabled APs
146 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
147 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
148 sdata
->bss
= &nsdata
->u
.ap
;
152 switch (sdata
->vif
.type
) {
153 case NL80211_IFTYPE_WDS
:
154 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
157 case NL80211_IFTYPE_AP_VLAN
:
160 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
162 case NL80211_IFTYPE_AP
:
163 sdata
->bss
= &sdata
->u
.ap
;
165 case NL80211_IFTYPE_MESH_POINT
:
166 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
168 /* mesh ifaces must set allmulti to forward mcast traffic */
169 atomic_inc(&local
->iff_allmultis
);
171 case NL80211_IFTYPE_STATION
:
172 case NL80211_IFTYPE_MONITOR
:
173 case NL80211_IFTYPE_ADHOC
:
174 /* no special treatment */
176 case NL80211_IFTYPE_UNSPECIFIED
:
177 case __NL80211_IFTYPE_AFTER_LAST
:
183 if (local
->open_count
== 0) {
184 res
= drv_start(local
);
187 /* we're brought up, everything changes */
188 hw_reconf_flags
= ~0;
189 ieee80211_led_radio(local
, true);
193 * Check all interfaces and copy the hopefully now-present
194 * MAC address to those that have the special null one.
196 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
197 struct net_device
*ndev
= nsdata
->dev
;
200 * No need to check running since we do not allow
201 * it to start up with this invalid address.
203 if (compare_ether_addr(null_addr
, ndev
->dev_addr
) == 0) {
204 memcpy(ndev
->dev_addr
,
205 local
->hw
.wiphy
->perm_addr
,
207 memcpy(ndev
->perm_addr
, ndev
->dev_addr
, ETH_ALEN
);
212 * Validate the MAC address for this device.
214 if (!is_valid_ether_addr(dev
->dev_addr
)) {
215 if (!local
->open_count
)
217 return -EADDRNOTAVAIL
;
220 switch (sdata
->vif
.type
) {
221 case NL80211_IFTYPE_AP_VLAN
:
222 /* no need to tell driver */
224 case NL80211_IFTYPE_MONITOR
:
225 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
226 local
->cooked_mntrs
++;
230 /* must be before the call to ieee80211_configure_filter */
232 if (local
->monitors
== 1) {
233 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
234 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
237 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
238 local
->fif_fcsfail
++;
239 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
240 local
->fif_plcpfail
++;
241 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
242 local
->fif_control
++;
245 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
246 local
->fif_other_bss
++;
248 ieee80211_configure_filter(local
);
251 conf
.vif
= &sdata
->vif
;
252 conf
.type
= sdata
->vif
.type
;
253 conf
.mac_addr
= sdata
->vif
.addr
;
254 res
= drv_add_interface(local
, &conf
);
258 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
259 local
->fif_other_bss
++;
260 ieee80211_configure_filter(local
);
262 ieee80211_start_mesh(sdata
);
263 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
266 ieee80211_configure_filter(local
);
269 changed
|= ieee80211_reset_erp_info(sdata
);
270 ieee80211_bss_info_change_notify(sdata
, changed
);
271 ieee80211_enable_keys(sdata
);
273 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
274 netif_carrier_off(dev
);
276 netif_carrier_on(dev
);
279 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
280 /* Create STA entry for the WDS peer */
281 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
285 goto err_del_interface
;
288 /* no locking required since STA is not live yet */
289 sta
->flags
|= WLAN_STA_AUTHORIZED
;
291 res
= sta_info_insert(sta
);
293 /* STA has been freed */
294 goto err_del_interface
;
299 * set_multicast_list will be invoked by the networking core
300 * which will check whether any increments here were done in
301 * error and sync them down to the hardware as filter flags.
303 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
304 atomic_inc(&local
->iff_allmultis
);
306 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
307 atomic_inc(&local
->iff_promiscs
);
309 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
312 if (hw_reconf_flags
) {
313 ieee80211_hw_config(local
, hw_reconf_flags
);
315 * set default queue parameters so drivers don't
316 * need to initialise the hardware if the hardware
317 * doesn't start up with sane defaults
319 ieee80211_set_wmm_default(sdata
);
322 ieee80211_recalc_ps(local
, -1);
325 * ieee80211_sta_work is disabled while network interface
326 * is down. Therefore, some configuration changes may not
327 * yet be effective. Trigger execution of ieee80211_sta_work
330 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
331 ieee80211_queue_work(&local
->hw
, &sdata
->u
.mgd
.work
);
333 netif_start_queue(dev
);
337 drv_remove_interface(local
, &conf
);
339 if (!local
->open_count
)
343 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
344 list_del(&sdata
->u
.vlan
.list
);
348 static int ieee80211_stop(struct net_device
*dev
)
350 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
351 struct ieee80211_local
*local
= sdata
->local
;
352 struct ieee80211_if_init_conf conf
;
353 struct sta_info
*sta
;
355 struct sk_buff
*skb
, *tmp
;
356 u32 hw_reconf_flags
= 0;
360 * Stop TX on this interface first.
362 netif_stop_queue(dev
);
365 * Now delete all active aggregation sessions.
369 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
370 if (sta
->sdata
== sdata
)
371 ieee80211_sta_tear_down_BA_sessions(sta
);
377 * Remove all stations associated with this interface.
379 * This must be done before calling ops->remove_interface()
380 * because otherwise we can later invoke ops->sta_notify()
381 * whenever the STAs are removed, and that invalidates driver
382 * assumptions about always getting a vif pointer that is valid
383 * (because if we remove a STA after ops->remove_interface()
384 * the driver will have removed the vif info already!)
386 * We could relax this and only unlink the stations from the
387 * hash table and list but keep them on a per-sdata list that
388 * will be inserted back again when the interface is brought
389 * up again, but I don't currently see a use case for that,
390 * except with WDS which gets a STA entry created when it is
393 sta_info_flush(local
, sdata
);
396 * Don't count this interface for promisc/allmulti while it
397 * is down. dev_mc_unsync() will invoke set_multicast_list
398 * on the master interface which will sync these down to the
399 * hardware as filter flags.
401 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
402 atomic_dec(&local
->iff_allmultis
);
404 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
405 atomic_dec(&local
->iff_promiscs
);
407 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
410 netif_addr_lock_bh(dev
);
411 spin_lock_bh(&local
->filter_lock
);
412 __dev_addr_unsync(&local
->mc_list
, &local
->mc_count
,
413 &dev
->mc_list
, &dev
->mc_count
);
414 spin_unlock_bh(&local
->filter_lock
);
415 netif_addr_unlock_bh(dev
);
417 ieee80211_configure_filter(local
);
419 del_timer_sync(&local
->dynamic_ps_timer
);
420 cancel_work_sync(&local
->dynamic_ps_enable_work
);
422 /* APs need special treatment */
423 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
424 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
425 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
428 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
432 /* down all dependent devices, that is VLANs */
433 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
435 dev_close(vlan
->dev
);
436 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
441 switch (sdata
->vif
.type
) {
442 case NL80211_IFTYPE_AP_VLAN
:
443 list_del(&sdata
->u
.vlan
.list
);
444 /* no need to tell driver */
446 case NL80211_IFTYPE_MONITOR
:
447 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
448 local
->cooked_mntrs
--;
453 if (local
->monitors
== 0) {
454 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
455 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
458 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
459 local
->fif_fcsfail
--;
460 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
461 local
->fif_plcpfail
--;
462 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
464 local
->fif_control
--;
466 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
467 local
->fif_other_bss
--;
469 ieee80211_configure_filter(local
);
471 case NL80211_IFTYPE_STATION
:
472 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
473 del_timer_sync(&sdata
->u
.mgd
.timer
);
474 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
475 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
477 * If any of the timers fired while we waited for it, it will
478 * have queued its work. Now the work will be running again
479 * but will not rearm the timer again because it checks
480 * whether the interface is running, which, at this point,
483 cancel_work_sync(&sdata
->u
.mgd
.work
);
484 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
485 cancel_work_sync(&sdata
->u
.mgd
.monitor_work
);
486 cancel_work_sync(&sdata
->u
.mgd
.beacon_loss_work
);
489 * When we get here, the interface is marked down.
490 * Call synchronize_rcu() to wait for the RX path
491 * should it be using the interface and enqueuing
492 * frames at this very time on another CPU.
495 skb_queue_purge(&sdata
->u
.mgd
.skb_queue
);
497 case NL80211_IFTYPE_ADHOC
:
498 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
499 del_timer_sync(&sdata
->u
.ibss
.timer
);
500 cancel_work_sync(&sdata
->u
.ibss
.work
);
502 skb_queue_purge(&sdata
->u
.ibss
.skb_queue
);
505 case NL80211_IFTYPE_MESH_POINT
:
506 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
507 /* other_bss and allmulti are always set on mesh
509 local
->fif_other_bss
--;
510 atomic_dec(&local
->iff_allmultis
);
512 ieee80211_configure_filter(local
);
514 ieee80211_stop_mesh(sdata
);
518 if (local
->scan_sdata
== sdata
)
519 ieee80211_scan_cancel(local
);
522 * Disable beaconing for AP and mesh, IBSS can't
523 * still be joined to a network at this point.
525 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
526 sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) {
527 ieee80211_bss_info_change_notify(sdata
,
528 BSS_CHANGED_BEACON_ENABLED
);
531 conf
.vif
= &sdata
->vif
;
532 conf
.type
= sdata
->vif
.type
;
533 conf
.mac_addr
= sdata
->vif
.addr
;
534 /* disable all keys for as long as this netdev is down */
535 ieee80211_disable_keys(sdata
);
536 drv_remove_interface(local
, &conf
);
541 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
543 ieee80211_recalc_ps(local
, -1);
545 if (local
->open_count
== 0) {
546 ieee80211_clear_tx_pending(local
);
547 ieee80211_stop_device(local
);
549 /* no reconfiguring after stop! */
553 /* do after stop to avoid reconfiguring when we stop anyway */
555 ieee80211_hw_config(local
, hw_reconf_flags
);
557 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
558 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
559 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
560 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
561 if (info
->control
.vif
== &sdata
->vif
) {
562 __skb_unlink(skb
, &local
->pending
[i
]);
563 dev_kfree_skb_irq(skb
);
567 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
572 static void ieee80211_set_multicast_list(struct net_device
*dev
)
574 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
575 struct ieee80211_local
*local
= sdata
->local
;
576 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
578 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
579 promisc
= !!(dev
->flags
& IFF_PROMISC
);
580 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
581 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
583 if (allmulti
!= sdata_allmulti
) {
584 if (dev
->flags
& IFF_ALLMULTI
)
585 atomic_inc(&local
->iff_allmultis
);
587 atomic_dec(&local
->iff_allmultis
);
588 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
591 if (promisc
!= sdata_promisc
) {
592 if (dev
->flags
& IFF_PROMISC
)
593 atomic_inc(&local
->iff_promiscs
);
595 atomic_dec(&local
->iff_promiscs
);
596 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
598 spin_lock_bh(&local
->filter_lock
);
599 __dev_addr_sync(&local
->mc_list
, &local
->mc_count
,
600 &dev
->mc_list
, &dev
->mc_count
);
601 spin_unlock_bh(&local
->filter_lock
);
602 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
606 * Called when the netdev is removed or, by the code below, before
607 * the interface type changes.
609 static void ieee80211_teardown_sdata(struct net_device
*dev
)
611 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
612 struct ieee80211_local
*local
= sdata
->local
;
613 struct beacon_data
*beacon
;
618 /* free extra data */
619 ieee80211_free_keys(sdata
);
621 ieee80211_debugfs_remove_netdev(sdata
);
623 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
624 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
625 sdata
->fragment_next
= 0;
627 switch (sdata
->vif
.type
) {
628 case NL80211_IFTYPE_AP
:
629 beacon
= sdata
->u
.ap
.beacon
;
630 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
634 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
635 local
->total_ps_buffered
--;
640 case NL80211_IFTYPE_MESH_POINT
:
641 if (ieee80211_vif_is_mesh(&sdata
->vif
))
642 mesh_rmc_free(sdata
);
644 case NL80211_IFTYPE_ADHOC
:
645 if (WARN_ON(sdata
->u
.ibss
.presp
))
646 kfree_skb(sdata
->u
.ibss
.presp
);
648 case NL80211_IFTYPE_STATION
:
649 case NL80211_IFTYPE_WDS
:
650 case NL80211_IFTYPE_AP_VLAN
:
651 case NL80211_IFTYPE_MONITOR
:
653 case NL80211_IFTYPE_UNSPECIFIED
:
654 case __NL80211_IFTYPE_AFTER_LAST
:
659 flushed
= sta_info_flush(local
, sdata
);
663 static const struct net_device_ops ieee80211_dataif_ops
= {
664 .ndo_open
= ieee80211_open
,
665 .ndo_stop
= ieee80211_stop
,
666 .ndo_uninit
= ieee80211_teardown_sdata
,
667 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
668 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
669 .ndo_change_mtu
= ieee80211_change_mtu
,
670 .ndo_set_mac_address
= ieee80211_change_mac
,
673 static const struct net_device_ops ieee80211_monitorif_ops
= {
674 .ndo_open
= ieee80211_open
,
675 .ndo_stop
= ieee80211_stop
,
676 .ndo_uninit
= ieee80211_teardown_sdata
,
677 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
678 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
679 .ndo_change_mtu
= ieee80211_change_mtu
,
680 .ndo_set_mac_address
= eth_mac_addr
,
683 static void ieee80211_if_setup(struct net_device
*dev
)
686 dev
->netdev_ops
= &ieee80211_dataif_ops
;
687 dev
->destructor
= free_netdev
;
691 * Helper function to initialise an interface to a specific type.
693 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
694 enum nl80211_iftype type
)
696 /* clear type-dependent union */
697 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
699 /* and set some type-dependent values */
700 sdata
->vif
.type
= type
;
701 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
702 sdata
->wdev
.iftype
= type
;
704 /* only monitor differs */
705 sdata
->dev
->type
= ARPHRD_ETHER
;
708 case NL80211_IFTYPE_AP
:
709 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
710 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
712 case NL80211_IFTYPE_STATION
:
713 ieee80211_sta_setup_sdata(sdata
);
715 case NL80211_IFTYPE_ADHOC
:
716 ieee80211_ibss_setup_sdata(sdata
);
718 case NL80211_IFTYPE_MESH_POINT
:
719 if (ieee80211_vif_is_mesh(&sdata
->vif
))
720 ieee80211_mesh_init_sdata(sdata
);
722 case NL80211_IFTYPE_MONITOR
:
723 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
724 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
725 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
726 MONITOR_FLAG_OTHER_BSS
;
728 case NL80211_IFTYPE_WDS
:
729 case NL80211_IFTYPE_AP_VLAN
:
731 case NL80211_IFTYPE_UNSPECIFIED
:
732 case __NL80211_IFTYPE_AFTER_LAST
:
737 ieee80211_debugfs_add_netdev(sdata
);
740 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
741 enum nl80211_iftype type
)
745 if (type
== sdata
->vif
.type
)
748 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
749 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
750 type
== NL80211_IFTYPE_ADHOC
)
754 * We could, here, on changes between IBSS/STA/MESH modes,
755 * invoke an MLME function instead that disassociates etc.
756 * and goes into the requested mode.
759 if (ieee80211_sdata_running(sdata
))
762 /* Purge and reset type-dependent state. */
763 ieee80211_teardown_sdata(sdata
->dev
);
764 ieee80211_setup_sdata(sdata
, type
);
766 /* reset some values that shouldn't be kept across type changes */
767 sdata
->vif
.bss_conf
.basic_rates
=
768 ieee80211_mandatory_rates(sdata
->local
,
769 sdata
->local
->hw
.conf
.channel
->band
);
770 sdata
->drop_unencrypted
= 0;
771 if (type
== NL80211_IFTYPE_STATION
)
772 sdata
->u
.mgd
.use_4addr
= false;
777 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
778 struct net_device
**new_dev
, enum nl80211_iftype type
,
779 struct vif_params
*params
)
781 struct net_device
*ndev
;
782 struct ieee80211_sub_if_data
*sdata
= NULL
;
787 ndev
= alloc_netdev(sizeof(*sdata
) + local
->hw
.vif_data_size
,
788 name
, ieee80211_if_setup
);
791 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
793 ndev
->needed_headroom
= local
->tx_headroom
+
794 4*6 /* four MAC addresses */
795 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
797 + 8 /* rfc1042/bridge tunnel */
798 - ETH_HLEN
/* ethernet hard_header_len */
799 + IEEE80211_ENCRYPT_HEADROOM
;
800 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
802 ret
= dev_alloc_name(ndev
, ndev
->name
);
806 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
807 memcpy(ndev
->perm_addr
, ndev
->dev_addr
, ETH_ALEN
);
808 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
810 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
811 sdata
= netdev_priv(ndev
);
812 ndev
->ieee80211_ptr
= &sdata
->wdev
;
813 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
814 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
816 /* initialise type-independent data */
817 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
818 sdata
->local
= local
;
821 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
822 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
824 INIT_LIST_HEAD(&sdata
->key_list
);
826 sdata
->force_unicast_rateidx
= -1;
827 sdata
->max_ratectrl_rateidx
= -1;
829 /* setup type-dependent data */
830 ieee80211_setup_sdata(sdata
, type
);
833 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
834 if (type
== NL80211_IFTYPE_STATION
)
835 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
838 ret
= register_netdevice(ndev
);
842 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
843 params
&& params
->mesh_id_len
)
844 ieee80211_sdata_set_mesh_id(sdata
,
848 mutex_lock(&local
->iflist_mtx
);
849 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
850 mutex_unlock(&local
->iflist_mtx
);
862 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
866 mutex_lock(&sdata
->local
->iflist_mtx
);
867 list_del_rcu(&sdata
->list
);
868 mutex_unlock(&sdata
->local
->iflist_mtx
);
871 unregister_netdevice(sdata
->dev
);
875 * Remove all interfaces, may only be called at hardware unregistration
876 * time because it doesn't do RCU-safe list removals.
878 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
880 struct ieee80211_sub_if_data
*sdata
, *tmp
;
881 LIST_HEAD(unreg_list
);
885 mutex_lock(&local
->iflist_mtx
);
886 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
887 list_del(&sdata
->list
);
889 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
891 mutex_unlock(&local
->iflist_mtx
);
892 unregister_netdevice_many(&unreg_list
);
895 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
898 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
901 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
902 printk(KERN_DEBUG
"%s: device no longer idle - %s\n",
903 wiphy_name(local
->hw
.wiphy
), reason
);
906 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
907 return IEEE80211_CONF_CHANGE_IDLE
;
910 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
912 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
915 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
916 printk(KERN_DEBUG
"%s: device now idle\n",
917 wiphy_name(local
->hw
.wiphy
));
920 drv_flush(local
, false);
922 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
923 return IEEE80211_CONF_CHANGE_IDLE
;
926 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
928 struct ieee80211_sub_if_data
*sdata
;
932 return ieee80211_idle_off(local
, "scanning");
934 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
935 if (!ieee80211_sdata_running(sdata
))
937 /* do not count disabled managed interfaces */
938 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
939 !sdata
->u
.mgd
.associated
&&
940 list_empty(&sdata
->u
.mgd
.work_list
))
942 /* do not count unused IBSS interfaces */
943 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
944 !sdata
->u
.ibss
.ssid_len
)
946 /* count everything else */
951 return ieee80211_idle_on(local
);
953 return ieee80211_idle_off(local
, "in use");
958 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
962 mutex_lock(&local
->iflist_mtx
);
963 chg
= __ieee80211_recalc_idle(local
);
964 mutex_unlock(&local
->iflist_mtx
);
966 ieee80211_hw_config(local
, chg
);
969 static int netdev_notify(struct notifier_block
*nb
,
973 struct net_device
*dev
= ndev
;
974 struct ieee80211_sub_if_data
*sdata
;
976 if (state
!= NETDEV_CHANGENAME
)
979 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
982 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
985 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
987 memcpy(sdata
->name
, sdata
->name
, IFNAMSIZ
);
989 ieee80211_debugfs_rename_netdev(sdata
);
993 static struct notifier_block mac80211_netdev_notifier
= {
994 .notifier_call
= netdev_notify
,
997 int ieee80211_iface_init(void)
999 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1002 void ieee80211_iface_exit(void)
1004 unregister_netdevice_notifier(&mac80211_netdev_notifier
);