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 int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
67 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
68 struct sockaddr
*sa
= addr
;
71 if (ieee80211_sdata_running(sdata
))
74 ret
= eth_mac_addr(dev
, sa
);
77 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
82 static inline int identical_mac_addr_allowed(int type1
, int type2
)
84 return type1
== NL80211_IFTYPE_MONITOR
||
85 type2
== NL80211_IFTYPE_MONITOR
||
86 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
87 (type1
== NL80211_IFTYPE_WDS
&&
88 (type2
== NL80211_IFTYPE_WDS
||
89 type2
== NL80211_IFTYPE_AP
)) ||
90 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
91 (type1
== NL80211_IFTYPE_AP_VLAN
&&
92 (type2
== NL80211_IFTYPE_AP
||
93 type2
== NL80211_IFTYPE_AP_VLAN
));
96 static int ieee80211_open(struct net_device
*dev
)
98 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
99 struct ieee80211_sub_if_data
*nsdata
;
100 struct ieee80211_local
*local
= sdata
->local
;
101 struct sta_info
*sta
;
104 u32 hw_reconf_flags
= 0;
105 u8 null_addr
[ETH_ALEN
] = {0};
107 /* fail early if user set an invalid address */
108 if (compare_ether_addr(dev
->dev_addr
, null_addr
) &&
109 !is_valid_ether_addr(dev
->dev_addr
))
110 return -EADDRNOTAVAIL
;
112 /* we hold the RTNL here so can safely walk the list */
113 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
114 struct net_device
*ndev
= nsdata
->dev
;
116 if (ndev
!= dev
&& ieee80211_sdata_running(nsdata
)) {
118 * Allow only a single IBSS interface to be up at any
119 * time. This is restricted because beacon distribution
120 * cannot work properly if both are in the same IBSS.
122 * To remove this restriction we'd have to disallow them
123 * from setting the same SSID on different IBSS interfaces
124 * belonging to the same hardware. Then, however, we're
125 * faced with having to adopt two different TSF timers...
127 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
128 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
132 * The remaining checks are only performed for interfaces
133 * with the same MAC address.
135 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
139 * check whether it may have the same address
141 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
146 * can only add VLANs to enabled APs
148 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
149 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
150 sdata
->bss
= &nsdata
->u
.ap
;
154 switch (sdata
->vif
.type
) {
155 case NL80211_IFTYPE_WDS
:
156 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
159 case NL80211_IFTYPE_AP_VLAN
:
162 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
164 case NL80211_IFTYPE_AP
:
165 sdata
->bss
= &sdata
->u
.ap
;
167 case NL80211_IFTYPE_MESH_POINT
:
168 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
170 /* mesh ifaces must set allmulti to forward mcast traffic */
171 atomic_inc(&local
->iff_allmultis
);
173 case NL80211_IFTYPE_STATION
:
174 case NL80211_IFTYPE_MONITOR
:
175 case NL80211_IFTYPE_ADHOC
:
176 /* no special treatment */
178 case NL80211_IFTYPE_UNSPECIFIED
:
179 case __NL80211_IFTYPE_AFTER_LAST
:
185 if (local
->open_count
== 0) {
186 res
= drv_start(local
);
189 /* we're brought up, everything changes */
190 hw_reconf_flags
= ~0;
191 ieee80211_led_radio(local
, true);
195 * Check all interfaces and copy the hopefully now-present
196 * MAC address to those that have the special null one.
198 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
199 struct net_device
*ndev
= nsdata
->dev
;
202 * No need to check running since we do not allow
203 * it to start up with this invalid address.
205 if (compare_ether_addr(null_addr
, ndev
->dev_addr
) == 0) {
206 memcpy(ndev
->dev_addr
,
207 local
->hw
.wiphy
->perm_addr
,
209 memcpy(ndev
->perm_addr
, ndev
->dev_addr
, ETH_ALEN
);
214 * Validate the MAC address for this device.
216 if (!is_valid_ether_addr(dev
->dev_addr
)) {
217 if (!local
->open_count
)
219 return -EADDRNOTAVAIL
;
222 switch (sdata
->vif
.type
) {
223 case NL80211_IFTYPE_AP_VLAN
:
224 /* no need to tell driver */
226 case NL80211_IFTYPE_MONITOR
:
227 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
228 local
->cooked_mntrs
++;
232 /* must be before the call to ieee80211_configure_filter */
234 if (local
->monitors
== 1) {
235 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
236 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
239 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
240 local
->fif_fcsfail
++;
241 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
242 local
->fif_plcpfail
++;
243 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
244 local
->fif_control
++;
247 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
248 local
->fif_other_bss
++;
250 ieee80211_configure_filter(local
);
253 res
= drv_add_interface(local
, &sdata
->vif
);
257 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
258 local
->fif_other_bss
++;
259 ieee80211_configure_filter(local
);
261 ieee80211_start_mesh(sdata
);
262 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
265 ieee80211_configure_filter(local
);
268 changed
|= ieee80211_reset_erp_info(sdata
);
269 ieee80211_bss_info_change_notify(sdata
, changed
);
270 ieee80211_enable_keys(sdata
);
272 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
273 netif_carrier_off(dev
);
275 netif_carrier_on(dev
);
278 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
279 /* Create STA entry for the WDS peer */
280 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
284 goto err_del_interface
;
287 /* no locking required since STA is not live yet */
288 sta
->flags
|= WLAN_STA_AUTHORIZED
;
290 res
= sta_info_insert(sta
);
292 /* STA has been freed */
293 goto err_del_interface
;
298 * set_multicast_list will be invoked by the networking core
299 * which will check whether any increments here were done in
300 * error and sync them down to the hardware as filter flags.
302 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
303 atomic_inc(&local
->iff_allmultis
);
305 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
306 atomic_inc(&local
->iff_promiscs
);
308 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
311 if (hw_reconf_flags
) {
312 ieee80211_hw_config(local
, hw_reconf_flags
);
314 * set default queue parameters so drivers don't
315 * need to initialise the hardware if the hardware
316 * doesn't start up with sane defaults
318 ieee80211_set_wmm_default(sdata
);
321 ieee80211_recalc_ps(local
, -1);
324 * ieee80211_sta_work is disabled while network interface
325 * is down. Therefore, some configuration changes may not
326 * yet be effective. Trigger execution of ieee80211_sta_work
329 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
330 ieee80211_queue_work(&local
->hw
, &sdata
->u
.mgd
.work
);
332 netif_tx_start_all_queues(dev
);
336 drv_remove_interface(local
, &sdata
->vif
);
338 if (!local
->open_count
)
342 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
343 list_del(&sdata
->u
.vlan
.list
);
347 static int ieee80211_stop(struct net_device
*dev
)
349 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
350 struct ieee80211_local
*local
= sdata
->local
;
351 struct sta_info
*sta
;
353 struct sk_buff
*skb
, *tmp
;
354 u32 hw_reconf_flags
= 0;
358 * Stop TX on this interface first.
360 netif_tx_stop_all_queues(dev
);
363 * Purge work for this interface.
365 ieee80211_work_purge(sdata
);
368 * Now delete all active aggregation sessions.
372 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
373 if (sta
->sdata
== sdata
)
374 ieee80211_sta_tear_down_BA_sessions(sta
);
380 * Remove all stations associated with this interface.
382 * This must be done before calling ops->remove_interface()
383 * because otherwise we can later invoke ops->sta_notify()
384 * whenever the STAs are removed, and that invalidates driver
385 * assumptions about always getting a vif pointer that is valid
386 * (because if we remove a STA after ops->remove_interface()
387 * the driver will have removed the vif info already!)
389 * We could relax this and only unlink the stations from the
390 * hash table and list but keep them on a per-sdata list that
391 * will be inserted back again when the interface is brought
392 * up again, but I don't currently see a use case for that,
393 * except with WDS which gets a STA entry created when it is
396 sta_info_flush(local
, sdata
);
399 * Don't count this interface for promisc/allmulti while it
400 * is down. dev_mc_unsync() will invoke set_multicast_list
401 * on the master interface which will sync these down to the
402 * hardware as filter flags.
404 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
405 atomic_dec(&local
->iff_allmultis
);
407 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
408 atomic_dec(&local
->iff_promiscs
);
410 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
413 netif_addr_lock_bh(dev
);
414 spin_lock_bh(&local
->filter_lock
);
415 __dev_addr_unsync(&local
->mc_list
, &local
->mc_count
,
416 &dev
->mc_list
, &dev
->mc_count
);
417 spin_unlock_bh(&local
->filter_lock
);
418 netif_addr_unlock_bh(dev
);
420 ieee80211_configure_filter(local
);
422 del_timer_sync(&local
->dynamic_ps_timer
);
423 cancel_work_sync(&local
->dynamic_ps_enable_work
);
425 /* APs need special treatment */
426 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
427 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
428 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
431 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
435 /* down all dependent devices, that is VLANs */
436 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
438 dev_close(vlan
->dev
);
439 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
444 switch (sdata
->vif
.type
) {
445 case NL80211_IFTYPE_AP_VLAN
:
446 list_del(&sdata
->u
.vlan
.list
);
447 /* no need to tell driver */
449 case NL80211_IFTYPE_MONITOR
:
450 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
451 local
->cooked_mntrs
--;
456 if (local
->monitors
== 0) {
457 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
458 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
461 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
462 local
->fif_fcsfail
--;
463 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
464 local
->fif_plcpfail
--;
465 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
467 local
->fif_control
--;
469 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
470 local
->fif_other_bss
--;
472 ieee80211_configure_filter(local
);
474 case NL80211_IFTYPE_STATION
:
475 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
476 del_timer_sync(&sdata
->u
.mgd
.timer
);
477 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
478 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
480 * If any of the timers fired while we waited for it, it will
481 * have queued its work. Now the work will be running again
482 * but will not rearm the timer again because it checks
483 * whether the interface is running, which, at this point,
486 cancel_work_sync(&sdata
->u
.mgd
.work
);
487 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
488 cancel_work_sync(&sdata
->u
.mgd
.monitor_work
);
489 cancel_work_sync(&sdata
->u
.mgd
.beacon_loss_work
);
492 * When we get here, the interface is marked down.
493 * Call synchronize_rcu() to wait for the RX path
494 * should it be using the interface and enqueuing
495 * frames at this very time on another CPU.
498 skb_queue_purge(&sdata
->u
.mgd
.skb_queue
);
500 case NL80211_IFTYPE_ADHOC
:
501 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
502 del_timer_sync(&sdata
->u
.ibss
.timer
);
503 cancel_work_sync(&sdata
->u
.ibss
.work
);
505 skb_queue_purge(&sdata
->u
.ibss
.skb_queue
);
508 case NL80211_IFTYPE_MESH_POINT
:
509 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
510 /* other_bss and allmulti are always set on mesh
512 local
->fif_other_bss
--;
513 atomic_dec(&local
->iff_allmultis
);
515 ieee80211_configure_filter(local
);
517 ieee80211_stop_mesh(sdata
);
521 if (local
->scan_sdata
== sdata
)
522 ieee80211_scan_cancel(local
);
525 * Disable beaconing for AP and mesh, IBSS can't
526 * still be joined to a network at this point.
528 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
529 sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) {
530 ieee80211_bss_info_change_notify(sdata
,
531 BSS_CHANGED_BEACON_ENABLED
);
534 /* disable all keys for as long as this netdev is down */
535 ieee80211_disable_keys(sdata
);
536 drv_remove_interface(local
, &sdata
->vif
);
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 u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
666 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
669 static const struct net_device_ops ieee80211_dataif_ops
= {
670 .ndo_open
= ieee80211_open
,
671 .ndo_stop
= ieee80211_stop
,
672 .ndo_uninit
= ieee80211_teardown_sdata
,
673 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
674 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
675 .ndo_change_mtu
= ieee80211_change_mtu
,
676 .ndo_set_mac_address
= ieee80211_change_mac
,
677 .ndo_select_queue
= ieee80211_netdev_select_queue
,
680 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
683 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
684 struct ieee80211_local
*local
= sdata
->local
;
685 struct ieee80211_hdr
*hdr
;
686 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
689 if (local
->hw
.queues
< 4)
693 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
694 return 0; /* doesn't matter, frame will be dropped */
696 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
698 if (!ieee80211_is_data(hdr
->frame_control
)) {
700 return ieee802_1d_to_ac
[skb
->priority
];
702 if (!ieee80211_is_data_qos(hdr
->frame_control
)) {
704 return ieee802_1d_to_ac
[skb
->priority
];
707 p
= ieee80211_get_qos_ctl(hdr
);
708 skb
->priority
= *p
& IEEE80211_QOS_CTL_TAG1D_MASK
;
710 return ieee80211_downgrade_queue(local
, skb
);
713 static const struct net_device_ops ieee80211_monitorif_ops
= {
714 .ndo_open
= ieee80211_open
,
715 .ndo_stop
= ieee80211_stop
,
716 .ndo_uninit
= ieee80211_teardown_sdata
,
717 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
718 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
719 .ndo_change_mtu
= ieee80211_change_mtu
,
720 .ndo_set_mac_address
= eth_mac_addr
,
721 .ndo_select_queue
= ieee80211_monitor_select_queue
,
724 static void ieee80211_if_setup(struct net_device
*dev
)
727 dev
->netdev_ops
= &ieee80211_dataif_ops
;
728 dev
->destructor
= free_netdev
;
732 * Helper function to initialise an interface to a specific type.
734 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
735 enum nl80211_iftype type
)
737 /* clear type-dependent union */
738 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
740 /* and set some type-dependent values */
741 sdata
->vif
.type
= type
;
742 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
743 sdata
->wdev
.iftype
= type
;
745 /* only monitor differs */
746 sdata
->dev
->type
= ARPHRD_ETHER
;
749 case NL80211_IFTYPE_AP
:
750 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
751 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
753 case NL80211_IFTYPE_STATION
:
754 ieee80211_sta_setup_sdata(sdata
);
756 case NL80211_IFTYPE_ADHOC
:
757 ieee80211_ibss_setup_sdata(sdata
);
759 case NL80211_IFTYPE_MESH_POINT
:
760 if (ieee80211_vif_is_mesh(&sdata
->vif
))
761 ieee80211_mesh_init_sdata(sdata
);
763 case NL80211_IFTYPE_MONITOR
:
764 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
765 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
766 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
767 MONITOR_FLAG_OTHER_BSS
;
769 case NL80211_IFTYPE_WDS
:
770 case NL80211_IFTYPE_AP_VLAN
:
772 case NL80211_IFTYPE_UNSPECIFIED
:
773 case __NL80211_IFTYPE_AFTER_LAST
:
778 ieee80211_debugfs_add_netdev(sdata
);
781 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
782 enum nl80211_iftype type
)
786 if (type
== sdata
->vif
.type
)
789 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
790 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
791 type
== NL80211_IFTYPE_ADHOC
)
795 * We could, here, on changes between IBSS/STA/MESH modes,
796 * invoke an MLME function instead that disassociates etc.
797 * and goes into the requested mode.
800 if (ieee80211_sdata_running(sdata
))
803 /* Purge and reset type-dependent state. */
804 ieee80211_teardown_sdata(sdata
->dev
);
805 ieee80211_setup_sdata(sdata
, type
);
807 /* reset some values that shouldn't be kept across type changes */
808 sdata
->vif
.bss_conf
.basic_rates
=
809 ieee80211_mandatory_rates(sdata
->local
,
810 sdata
->local
->hw
.conf
.channel
->band
);
811 sdata
->drop_unencrypted
= 0;
812 if (type
== NL80211_IFTYPE_STATION
)
813 sdata
->u
.mgd
.use_4addr
= false;
818 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
819 struct net_device
**new_dev
, enum nl80211_iftype type
,
820 struct vif_params
*params
)
822 struct net_device
*ndev
;
823 struct ieee80211_sub_if_data
*sdata
= NULL
;
828 ndev
= alloc_netdev_mq(sizeof(*sdata
) + local
->hw
.vif_data_size
,
829 name
, ieee80211_if_setup
, local
->hw
.queues
);
832 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
834 ndev
->needed_headroom
= local
->tx_headroom
+
835 4*6 /* four MAC addresses */
836 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
838 + 8 /* rfc1042/bridge tunnel */
839 - ETH_HLEN
/* ethernet hard_header_len */
840 + IEEE80211_ENCRYPT_HEADROOM
;
841 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
843 ret
= dev_alloc_name(ndev
, ndev
->name
);
847 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
848 memcpy(ndev
->perm_addr
, ndev
->dev_addr
, ETH_ALEN
);
849 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
851 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
852 sdata
= netdev_priv(ndev
);
853 ndev
->ieee80211_ptr
= &sdata
->wdev
;
854 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
855 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
857 /* initialise type-independent data */
858 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
859 sdata
->local
= local
;
862 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
863 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
865 INIT_LIST_HEAD(&sdata
->key_list
);
867 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
868 struct ieee80211_supported_band
*sband
;
869 sband
= local
->hw
.wiphy
->bands
[i
];
870 sdata
->rc_rateidx_mask
[i
] =
871 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
874 /* setup type-dependent data */
875 ieee80211_setup_sdata(sdata
, type
);
878 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
879 if (type
== NL80211_IFTYPE_STATION
)
880 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
883 ret
= register_netdevice(ndev
);
887 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
888 params
&& params
->mesh_id_len
)
889 ieee80211_sdata_set_mesh_id(sdata
,
893 mutex_lock(&local
->iflist_mtx
);
894 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
895 mutex_unlock(&local
->iflist_mtx
);
907 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
911 mutex_lock(&sdata
->local
->iflist_mtx
);
912 list_del_rcu(&sdata
->list
);
913 mutex_unlock(&sdata
->local
->iflist_mtx
);
916 unregister_netdevice(sdata
->dev
);
920 * Remove all interfaces, may only be called at hardware unregistration
921 * time because it doesn't do RCU-safe list removals.
923 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
925 struct ieee80211_sub_if_data
*sdata
, *tmp
;
926 LIST_HEAD(unreg_list
);
930 mutex_lock(&local
->iflist_mtx
);
931 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
932 list_del(&sdata
->list
);
934 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
936 mutex_unlock(&local
->iflist_mtx
);
937 unregister_netdevice_many(&unreg_list
);
940 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
943 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
946 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
947 printk(KERN_DEBUG
"%s: device no longer idle - %s\n",
948 wiphy_name(local
->hw
.wiphy
), reason
);
951 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
952 return IEEE80211_CONF_CHANGE_IDLE
;
955 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
957 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
960 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
961 printk(KERN_DEBUG
"%s: device now idle\n",
962 wiphy_name(local
->hw
.wiphy
));
965 drv_flush(local
, false);
967 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
968 return IEEE80211_CONF_CHANGE_IDLE
;
971 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
973 struct ieee80211_sub_if_data
*sdata
;
976 if (!list_empty(&local
->work_list
))
977 return ieee80211_idle_off(local
, "working");
980 return ieee80211_idle_off(local
, "scanning");
982 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
983 if (!ieee80211_sdata_running(sdata
))
985 /* do not count disabled managed interfaces */
986 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
987 !sdata
->u
.mgd
.associated
)
989 /* do not count unused IBSS interfaces */
990 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
991 !sdata
->u
.ibss
.ssid_len
)
993 /* count everything else */
998 return ieee80211_idle_on(local
);
1000 return ieee80211_idle_off(local
, "in use");
1005 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
1009 mutex_lock(&local
->iflist_mtx
);
1010 chg
= __ieee80211_recalc_idle(local
);
1011 mutex_unlock(&local
->iflist_mtx
);
1013 ieee80211_hw_config(local
, chg
);
1016 static int netdev_notify(struct notifier_block
*nb
,
1017 unsigned long state
,
1020 struct net_device
*dev
= ndev
;
1021 struct ieee80211_sub_if_data
*sdata
;
1023 if (state
!= NETDEV_CHANGENAME
)
1026 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1029 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1032 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1034 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1036 ieee80211_debugfs_rename_netdev(sdata
);
1040 static struct notifier_block mac80211_netdev_notifier
= {
1041 .notifier_call
= netdev_notify
,
1044 int ieee80211_iface_init(void)
1046 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1049 void ieee80211_iface_exit(void)
1051 unregister_netdevice_notifier(&mac80211_netdev_notifier
);