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 inline int identical_mac_addr_allowed(int type1
, int type2
)
65 return type1
== NL80211_IFTYPE_MONITOR
||
66 type2
== NL80211_IFTYPE_MONITOR
||
67 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
68 (type1
== NL80211_IFTYPE_WDS
&&
69 (type2
== NL80211_IFTYPE_WDS
||
70 type2
== NL80211_IFTYPE_AP
)) ||
71 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
72 (type1
== NL80211_IFTYPE_AP_VLAN
&&
73 (type2
== NL80211_IFTYPE_AP
||
74 type2
== NL80211_IFTYPE_AP_VLAN
));
77 static int ieee80211_open(struct net_device
*dev
)
79 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
80 struct ieee80211_sub_if_data
*nsdata
;
81 struct ieee80211_local
*local
= sdata
->local
;
83 struct ieee80211_if_init_conf conf
;
86 u32 hw_reconf_flags
= 0;
87 u8 null_addr
[ETH_ALEN
] = {0};
89 /* fail early if user set an invalid address */
90 if (compare_ether_addr(dev
->dev_addr
, null_addr
) &&
91 !is_valid_ether_addr(dev
->dev_addr
))
92 return -EADDRNOTAVAIL
;
94 /* we hold the RTNL here so can safely walk the list */
95 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
96 struct net_device
*ndev
= nsdata
->dev
;
98 if (ndev
!= dev
&& netif_running(ndev
)) {
100 * Allow only a single IBSS interface to be up at any
101 * time. This is restricted because beacon distribution
102 * cannot work properly if both are in the same IBSS.
104 * To remove this restriction we'd have to disallow them
105 * from setting the same SSID on different IBSS interfaces
106 * belonging to the same hardware. Then, however, we're
107 * faced with having to adopt two different TSF timers...
109 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
110 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
114 * The remaining checks are only performed for interfaces
115 * with the same MAC address.
117 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
121 * check whether it may have the same address
123 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
128 * can only add VLANs to enabled APs
130 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
131 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
132 sdata
->bss
= &nsdata
->u
.ap
;
136 switch (sdata
->vif
.type
) {
137 case NL80211_IFTYPE_WDS
:
138 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
141 case NL80211_IFTYPE_AP_VLAN
:
144 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
146 case NL80211_IFTYPE_AP
:
147 sdata
->bss
= &sdata
->u
.ap
;
149 case NL80211_IFTYPE_MESH_POINT
:
150 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
152 /* mesh ifaces must set allmulti to forward mcast traffic */
153 atomic_inc(&local
->iff_allmultis
);
155 case NL80211_IFTYPE_STATION
:
156 case NL80211_IFTYPE_MONITOR
:
157 case NL80211_IFTYPE_ADHOC
:
158 /* no special treatment */
160 case NL80211_IFTYPE_UNSPECIFIED
:
161 case __NL80211_IFTYPE_AFTER_LAST
:
167 if (local
->open_count
== 0) {
168 res
= drv_start(local
);
171 /* we're brought up, everything changes */
172 hw_reconf_flags
= ~0;
173 ieee80211_led_radio(local
, true);
177 * Check all interfaces and copy the hopefully now-present
178 * MAC address to those that have the special null one.
180 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
181 struct net_device
*ndev
= nsdata
->dev
;
184 * No need to check netif_running since we do not allow
185 * it to start up with this invalid address.
187 if (compare_ether_addr(null_addr
, ndev
->dev_addr
) == 0)
188 memcpy(ndev
->dev_addr
,
189 local
->hw
.wiphy
->perm_addr
,
194 * Validate the MAC address for this device.
196 if (!is_valid_ether_addr(dev
->dev_addr
)) {
197 if (!local
->open_count
)
199 return -EADDRNOTAVAIL
;
202 switch (sdata
->vif
.type
) {
203 case NL80211_IFTYPE_AP_VLAN
:
204 /* no need to tell driver */
206 case NL80211_IFTYPE_MONITOR
:
207 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
208 local
->cooked_mntrs
++;
212 /* must be before the call to ieee80211_configure_filter */
214 if (local
->monitors
== 1) {
215 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
216 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_RADIOTAP
;
219 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
220 local
->fif_fcsfail
++;
221 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
222 local
->fif_plcpfail
++;
223 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
224 local
->fif_control
++;
225 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
226 local
->fif_other_bss
++;
228 spin_lock_bh(&local
->filter_lock
);
229 ieee80211_configure_filter(local
);
230 spin_unlock_bh(&local
->filter_lock
);
233 conf
.vif
= &sdata
->vif
;
234 conf
.type
= sdata
->vif
.type
;
235 conf
.mac_addr
= dev
->dev_addr
;
236 res
= drv_add_interface(local
, &conf
);
240 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
241 local
->fif_other_bss
++;
242 spin_lock_bh(&local
->filter_lock
);
243 ieee80211_configure_filter(local
);
244 spin_unlock_bh(&local
->filter_lock
);
246 ieee80211_start_mesh(sdata
);
248 changed
|= ieee80211_reset_erp_info(sdata
);
249 ieee80211_bss_info_change_notify(sdata
, changed
);
250 ieee80211_enable_keys(sdata
);
252 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
253 netif_carrier_off(dev
);
255 netif_carrier_on(dev
);
258 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
259 /* Create STA entry for the WDS peer */
260 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
264 goto err_del_interface
;
267 /* no locking required since STA is not live yet */
268 sta
->flags
|= WLAN_STA_AUTHORIZED
;
270 res
= sta_info_insert(sta
);
272 /* STA has been freed */
273 goto err_del_interface
;
277 if (local
->open_count
== 0) {
278 tasklet_enable(&local
->tx_pending_tasklet
);
279 tasklet_enable(&local
->tasklet
);
283 * set_multicast_list will be invoked by the networking core
284 * which will check whether any increments here were done in
285 * error and sync them down to the hardware as filter flags.
287 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
288 atomic_inc(&local
->iff_allmultis
);
290 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
291 atomic_inc(&local
->iff_promiscs
);
293 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
296 if (hw_reconf_flags
) {
297 ieee80211_hw_config(local
, hw_reconf_flags
);
299 * set default queue parameters so drivers don't
300 * need to initialise the hardware if the hardware
301 * doesn't start up with sane defaults
303 ieee80211_set_wmm_default(sdata
);
306 ieee80211_recalc_ps(local
, -1);
309 * ieee80211_sta_work is disabled while network interface
310 * is down. Therefore, some configuration changes may not
311 * yet be effective. Trigger execution of ieee80211_sta_work
314 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
315 queue_work(local
->hw
.workqueue
, &sdata
->u
.mgd
.work
);
317 netif_tx_start_all_queues(dev
);
321 drv_remove_interface(local
, &conf
);
323 if (!local
->open_count
)
327 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
328 list_del(&sdata
->u
.vlan
.list
);
332 static int ieee80211_stop(struct net_device
*dev
)
334 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
335 struct ieee80211_local
*local
= sdata
->local
;
336 struct ieee80211_if_init_conf conf
;
337 struct sta_info
*sta
;
339 struct sk_buff
*skb
, *tmp
;
340 u32 hw_reconf_flags
= 0;
344 * Stop TX on this interface first.
346 netif_tx_stop_all_queues(dev
);
349 * Now delete all active aggregation sessions.
353 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
354 if (sta
->sdata
== sdata
)
355 ieee80211_sta_tear_down_BA_sessions(sta
);
361 * Remove all stations associated with this interface.
363 * This must be done before calling ops->remove_interface()
364 * because otherwise we can later invoke ops->sta_notify()
365 * whenever the STAs are removed, and that invalidates driver
366 * assumptions about always getting a vif pointer that is valid
367 * (because if we remove a STA after ops->remove_interface()
368 * the driver will have removed the vif info already!)
370 * We could relax this and only unlink the stations from the
371 * hash table and list but keep them on a per-sdata list that
372 * will be inserted back again when the interface is brought
373 * up again, but I don't currently see a use case for that,
374 * except with WDS which gets a STA entry created when it is
377 sta_info_flush(local
, sdata
);
380 * Don't count this interface for promisc/allmulti while it
381 * is down. dev_mc_unsync() will invoke set_multicast_list
382 * on the master interface which will sync these down to the
383 * hardware as filter flags.
385 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
386 atomic_dec(&local
->iff_allmultis
);
388 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
389 atomic_dec(&local
->iff_promiscs
);
391 netif_addr_lock_bh(dev
);
392 spin_lock_bh(&local
->filter_lock
);
393 __dev_addr_unsync(&local
->mc_list
, &local
->mc_count
,
394 &dev
->mc_list
, &dev
->mc_count
);
395 ieee80211_configure_filter(local
);
396 spin_unlock_bh(&local
->filter_lock
);
397 netif_addr_unlock_bh(dev
);
399 del_timer_sync(&local
->dynamic_ps_timer
);
400 cancel_work_sync(&local
->dynamic_ps_enable_work
);
402 /* APs need special treatment */
403 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
404 struct ieee80211_sub_if_data
*vlan
, *tmp
;
405 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
408 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
412 /* down all dependent devices, that is VLANs */
413 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
415 dev_close(vlan
->dev
);
416 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
421 switch (sdata
->vif
.type
) {
422 case NL80211_IFTYPE_AP_VLAN
:
423 list_del(&sdata
->u
.vlan
.list
);
424 /* no need to tell driver */
426 case NL80211_IFTYPE_MONITOR
:
427 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
428 local
->cooked_mntrs
--;
433 if (local
->monitors
== 0) {
434 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
435 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_RADIOTAP
;
438 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
439 local
->fif_fcsfail
--;
440 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
441 local
->fif_plcpfail
--;
442 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
443 local
->fif_control
--;
444 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
445 local
->fif_other_bss
--;
447 spin_lock_bh(&local
->filter_lock
);
448 ieee80211_configure_filter(local
);
449 spin_unlock_bh(&local
->filter_lock
);
451 case NL80211_IFTYPE_STATION
:
452 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
453 del_timer_sync(&sdata
->u
.mgd
.timer
);
454 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
455 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
457 * If any of the timers fired while we waited for it, it will
458 * have queued its work. Now the work will be running again
459 * but will not rearm the timer again because it checks
460 * whether the interface is running, which, at this point,
463 cancel_work_sync(&sdata
->u
.mgd
.work
);
464 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
465 cancel_work_sync(&sdata
->u
.mgd
.monitor_work
);
466 cancel_work_sync(&sdata
->u
.mgd
.beacon_loss_work
);
469 * When we get here, the interface is marked down.
470 * Call synchronize_rcu() to wait for the RX path
471 * should it be using the interface and enqueuing
472 * frames at this very time on another CPU.
475 skb_queue_purge(&sdata
->u
.mgd
.skb_queue
);
477 case NL80211_IFTYPE_ADHOC
:
478 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
479 del_timer_sync(&sdata
->u
.ibss
.timer
);
480 cancel_work_sync(&sdata
->u
.ibss
.work
);
482 skb_queue_purge(&sdata
->u
.ibss
.skb_queue
);
485 case NL80211_IFTYPE_MESH_POINT
:
486 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
487 /* other_bss and allmulti are always set on mesh
489 local
->fif_other_bss
--;
490 atomic_dec(&local
->iff_allmultis
);
492 spin_lock_bh(&local
->filter_lock
);
493 ieee80211_configure_filter(local
);
494 spin_unlock_bh(&local
->filter_lock
);
496 ieee80211_stop_mesh(sdata
);
500 if (local
->scan_sdata
== sdata
) {
501 if (!local
->ops
->hw_scan
)
502 cancel_delayed_work_sync(&local
->scan_work
);
504 * The software scan can no longer run now, so we can
505 * clear out the scan_sdata reference. However, the
506 * hardware scan may still be running. The complete
507 * function must be prepared to handle a NULL value.
509 local
->scan_sdata
= NULL
;
511 * The memory barrier guarantees that another CPU
512 * that is hardware-scanning will now see the fact
513 * that this interface is gone.
517 * If software scanning, complete the scan but since
518 * the scan_sdata is NULL already don't send out a
519 * scan event to userspace -- the scan is incomplete.
521 if (test_bit(SCAN_SW_SCANNING
, &local
->scanning
))
522 ieee80211_scan_completed(&local
->hw
, true);
525 conf
.vif
= &sdata
->vif
;
526 conf
.type
= sdata
->vif
.type
;
527 conf
.mac_addr
= dev
->dev_addr
;
528 /* disable all keys for as long as this netdev is down */
529 ieee80211_disable_keys(sdata
);
530 drv_remove_interface(local
, &conf
);
535 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
537 ieee80211_recalc_ps(local
, -1);
539 if (local
->open_count
== 0) {
542 ieee80211_led_radio(local
, false);
544 flush_workqueue(local
->hw
.workqueue
);
546 tasklet_disable(&local
->tx_pending_tasklet
);
547 tasklet_disable(&local
->tasklet
);
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 ieee80211_configure_filter(local
);
602 spin_unlock_bh(&local
->filter_lock
);
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
= eth_mac_addr
,
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
->wireless_handlers
= &ieee80211_iw_handler_def
;
688 dev
->destructor
= free_netdev
;
692 * Helper function to initialise an interface to a specific type.
694 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
695 enum nl80211_iftype type
)
697 /* clear type-dependent union */
698 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
700 /* and set some type-dependent values */
701 sdata
->vif
.type
= type
;
702 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
703 sdata
->wdev
.iftype
= type
;
705 /* only monitor differs */
706 sdata
->dev
->type
= ARPHRD_ETHER
;
709 case NL80211_IFTYPE_AP
:
710 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
711 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
713 case NL80211_IFTYPE_STATION
:
714 ieee80211_sta_setup_sdata(sdata
);
716 case NL80211_IFTYPE_ADHOC
:
717 ieee80211_ibss_setup_sdata(sdata
);
719 case NL80211_IFTYPE_MESH_POINT
:
720 if (ieee80211_vif_is_mesh(&sdata
->vif
))
721 ieee80211_mesh_init_sdata(sdata
);
723 case NL80211_IFTYPE_MONITOR
:
724 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
725 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
726 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
727 MONITOR_FLAG_OTHER_BSS
;
729 case NL80211_IFTYPE_WDS
:
730 case NL80211_IFTYPE_AP_VLAN
:
732 case NL80211_IFTYPE_UNSPECIFIED
:
733 case __NL80211_IFTYPE_AFTER_LAST
:
738 ieee80211_debugfs_add_netdev(sdata
);
741 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
742 enum nl80211_iftype type
)
746 if (type
== sdata
->vif
.type
)
749 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
750 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
751 type
== NL80211_IFTYPE_ADHOC
)
755 * We could, here, on changes between IBSS/STA/MESH modes,
756 * invoke an MLME function instead that disassociates etc.
757 * and goes into the requested mode.
760 if (netif_running(sdata
->dev
))
763 /* Purge and reset type-dependent state. */
764 ieee80211_teardown_sdata(sdata
->dev
);
765 ieee80211_setup_sdata(sdata
, type
);
767 /* reset some values that shouldn't be kept across type changes */
768 sdata
->vif
.bss_conf
.basic_rates
=
769 ieee80211_mandatory_rates(sdata
->local
,
770 sdata
->local
->hw
.conf
.channel
->band
);
771 sdata
->drop_unencrypted
= 0;
776 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
777 struct net_device
**new_dev
, enum nl80211_iftype type
,
778 struct vif_params
*params
)
780 struct net_device
*ndev
;
781 struct ieee80211_sub_if_data
*sdata
= NULL
;
786 ndev
= alloc_netdev(sizeof(*sdata
) + local
->hw
.vif_data_size
,
787 name
, ieee80211_if_setup
);
790 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
792 ndev
->needed_headroom
= local
->tx_headroom
+
793 4*6 /* four MAC addresses */
794 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
796 + 8 /* rfc1042/bridge tunnel */
797 - ETH_HLEN
/* ethernet hard_header_len */
798 + IEEE80211_ENCRYPT_HEADROOM
;
799 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
801 ret
= dev_alloc_name(ndev
, ndev
->name
);
805 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
806 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
808 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
809 sdata
= netdev_priv(ndev
);
810 ndev
->ieee80211_ptr
= &sdata
->wdev
;
812 /* initialise type-independent data */
813 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
814 sdata
->local
= local
;
817 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
818 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
820 INIT_LIST_HEAD(&sdata
->key_list
);
822 sdata
->force_unicast_rateidx
= -1;
823 sdata
->max_ratectrl_rateidx
= -1;
825 /* setup type-dependent data */
826 ieee80211_setup_sdata(sdata
, type
);
828 ret
= register_netdevice(ndev
);
832 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
833 params
&& params
->mesh_id_len
)
834 ieee80211_sdata_set_mesh_id(sdata
,
838 mutex_lock(&local
->iflist_mtx
);
839 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
840 mutex_unlock(&local
->iflist_mtx
);
852 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
856 mutex_lock(&sdata
->local
->iflist_mtx
);
857 list_del_rcu(&sdata
->list
);
858 mutex_unlock(&sdata
->local
->iflist_mtx
);
861 unregister_netdevice(sdata
->dev
);
865 * Remove all interfaces, may only be called at hardware unregistration
866 * time because it doesn't do RCU-safe list removals.
868 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
870 struct ieee80211_sub_if_data
*sdata
, *tmp
;
874 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
876 * we cannot hold the iflist_mtx across unregister_netdevice,
877 * but we only need to hold it for list modifications to lock
878 * out readers since we're under the RTNL here as all other
881 mutex_lock(&local
->iflist_mtx
);
882 list_del(&sdata
->list
);
883 mutex_unlock(&local
->iflist_mtx
);
885 unregister_netdevice(sdata
->dev
);
889 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
892 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
895 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
896 printk(KERN_DEBUG
"%s: device no longer idle - %s\n",
897 wiphy_name(local
->hw
.wiphy
), reason
);
900 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
901 return IEEE80211_CONF_CHANGE_IDLE
;
904 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
906 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
909 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
910 printk(KERN_DEBUG
"%s: device now idle\n",
911 wiphy_name(local
->hw
.wiphy
));
914 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
915 return IEEE80211_CONF_CHANGE_IDLE
;
918 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
920 struct ieee80211_sub_if_data
*sdata
;
924 return ieee80211_idle_off(local
, "scanning");
926 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
927 if (!netif_running(sdata
->dev
))
929 /* do not count disabled managed interfaces */
930 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
931 !sdata
->u
.mgd
.associated
&&
932 list_empty(&sdata
->u
.mgd
.work_list
))
934 /* do not count unused IBSS interfaces */
935 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
936 !sdata
->u
.ibss
.ssid_len
)
938 /* count everything else */
943 return ieee80211_idle_on(local
);
945 return ieee80211_idle_off(local
, "in use");
950 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
954 mutex_lock(&local
->iflist_mtx
);
955 chg
= __ieee80211_recalc_idle(local
);
956 mutex_unlock(&local
->iflist_mtx
);
958 ieee80211_hw_config(local
, chg
);