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
;
338 u32 hw_reconf_flags
= 0;
341 * Stop TX on this interface first.
343 netif_tx_stop_all_queues(dev
);
346 * Now delete all active aggregation sessions.
350 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
351 if (sta
->sdata
== sdata
)
352 ieee80211_sta_tear_down_BA_sessions(sta
);
358 * Remove all stations associated with this interface.
360 * This must be done before calling ops->remove_interface()
361 * because otherwise we can later invoke ops->sta_notify()
362 * whenever the STAs are removed, and that invalidates driver
363 * assumptions about always getting a vif pointer that is valid
364 * (because if we remove a STA after ops->remove_interface()
365 * the driver will have removed the vif info already!)
367 * We could relax this and only unlink the stations from the
368 * hash table and list but keep them on a per-sdata list that
369 * will be inserted back again when the interface is brought
370 * up again, but I don't currently see a use case for that,
371 * except with WDS which gets a STA entry created when it is
374 sta_info_flush(local
, sdata
);
377 * Don't count this interface for promisc/allmulti while it
378 * is down. dev_mc_unsync() will invoke set_multicast_list
379 * on the master interface which will sync these down to the
380 * hardware as filter flags.
382 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
383 atomic_dec(&local
->iff_allmultis
);
385 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
386 atomic_dec(&local
->iff_promiscs
);
388 netif_addr_lock_bh(dev
);
389 spin_lock_bh(&local
->filter_lock
);
390 __dev_addr_unsync(&local
->mc_list
, &local
->mc_count
,
391 &dev
->mc_list
, &dev
->mc_count
);
392 ieee80211_configure_filter(local
);
393 spin_unlock_bh(&local
->filter_lock
);
394 netif_addr_unlock_bh(dev
);
396 del_timer_sync(&local
->dynamic_ps_timer
);
397 cancel_work_sync(&local
->dynamic_ps_enable_work
);
399 /* APs need special treatment */
400 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
401 struct ieee80211_sub_if_data
*vlan
, *tmp
;
402 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
405 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
409 /* down all dependent devices, that is VLANs */
410 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
412 dev_close(vlan
->dev
);
413 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
418 switch (sdata
->vif
.type
) {
419 case NL80211_IFTYPE_AP_VLAN
:
420 list_del(&sdata
->u
.vlan
.list
);
421 /* no need to tell driver */
423 case NL80211_IFTYPE_MONITOR
:
424 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
425 local
->cooked_mntrs
--;
430 if (local
->monitors
== 0) {
431 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
432 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_RADIOTAP
;
435 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
436 local
->fif_fcsfail
--;
437 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
438 local
->fif_plcpfail
--;
439 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
440 local
->fif_control
--;
441 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
442 local
->fif_other_bss
--;
444 spin_lock_bh(&local
->filter_lock
);
445 ieee80211_configure_filter(local
);
446 spin_unlock_bh(&local
->filter_lock
);
448 case NL80211_IFTYPE_STATION
:
449 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
450 del_timer_sync(&sdata
->u
.mgd
.timer
);
451 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
452 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
454 * If any of the timers fired while we waited for it, it will
455 * have queued its work. Now the work will be running again
456 * but will not rearm the timer again because it checks
457 * whether the interface is running, which, at this point,
460 cancel_work_sync(&sdata
->u
.mgd
.work
);
461 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
462 cancel_work_sync(&sdata
->u
.mgd
.monitor_work
);
463 cancel_work_sync(&sdata
->u
.mgd
.beacon_loss_work
);
466 * When we get here, the interface is marked down.
467 * Call synchronize_rcu() to wait for the RX path
468 * should it be using the interface and enqueuing
469 * frames at this very time on another CPU.
472 skb_queue_purge(&sdata
->u
.mgd
.skb_queue
);
474 case NL80211_IFTYPE_ADHOC
:
475 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
476 del_timer_sync(&sdata
->u
.ibss
.timer
);
477 cancel_work_sync(&sdata
->u
.ibss
.work
);
479 skb_queue_purge(&sdata
->u
.ibss
.skb_queue
);
482 case NL80211_IFTYPE_MESH_POINT
:
483 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
484 /* other_bss and allmulti are always set on mesh
486 local
->fif_other_bss
--;
487 atomic_dec(&local
->iff_allmultis
);
489 spin_lock_bh(&local
->filter_lock
);
490 ieee80211_configure_filter(local
);
491 spin_unlock_bh(&local
->filter_lock
);
493 ieee80211_stop_mesh(sdata
);
497 if (local
->scan_sdata
== sdata
) {
498 if (!local
->ops
->hw_scan
)
499 cancel_delayed_work_sync(&local
->scan_work
);
501 * The software scan can no longer run now, so we can
502 * clear out the scan_sdata reference. However, the
503 * hardware scan may still be running. The complete
504 * function must be prepared to handle a NULL value.
506 local
->scan_sdata
= NULL
;
508 * The memory barrier guarantees that another CPU
509 * that is hardware-scanning will now see the fact
510 * that this interface is gone.
514 * If software scanning, complete the scan but since
515 * the scan_sdata is NULL already don't send out a
516 * scan event to userspace -- the scan is incomplete.
518 if (local
->sw_scanning
)
519 ieee80211_scan_completed(&local
->hw
, true);
522 conf
.vif
= &sdata
->vif
;
523 conf
.type
= sdata
->vif
.type
;
524 conf
.mac_addr
= dev
->dev_addr
;
525 /* disable all keys for as long as this netdev is down */
526 ieee80211_disable_keys(sdata
);
527 drv_remove_interface(local
, &conf
);
532 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
534 ieee80211_recalc_ps(local
, -1);
536 if (local
->open_count
== 0) {
539 ieee80211_led_radio(local
, false);
541 flush_workqueue(local
->hw
.workqueue
);
543 tasklet_disable(&local
->tx_pending_tasklet
);
544 tasklet_disable(&local
->tasklet
);
546 /* no reconfiguring after stop! */
550 /* do after stop to avoid reconfiguring when we stop anyway */
552 ieee80211_hw_config(local
, hw_reconf_flags
);
557 static void ieee80211_set_multicast_list(struct net_device
*dev
)
559 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
560 struct ieee80211_local
*local
= sdata
->local
;
561 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
563 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
564 promisc
= !!(dev
->flags
& IFF_PROMISC
);
565 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
566 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
568 if (allmulti
!= sdata_allmulti
) {
569 if (dev
->flags
& IFF_ALLMULTI
)
570 atomic_inc(&local
->iff_allmultis
);
572 atomic_dec(&local
->iff_allmultis
);
573 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
576 if (promisc
!= sdata_promisc
) {
577 if (dev
->flags
& IFF_PROMISC
)
578 atomic_inc(&local
->iff_promiscs
);
580 atomic_dec(&local
->iff_promiscs
);
581 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
583 spin_lock_bh(&local
->filter_lock
);
584 __dev_addr_sync(&local
->mc_list
, &local
->mc_count
,
585 &dev
->mc_list
, &dev
->mc_count
);
586 ieee80211_configure_filter(local
);
587 spin_unlock_bh(&local
->filter_lock
);
591 * Called when the netdev is removed or, by the code below, before
592 * the interface type changes.
594 static void ieee80211_teardown_sdata(struct net_device
*dev
)
596 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
597 struct ieee80211_local
*local
= sdata
->local
;
598 struct beacon_data
*beacon
;
603 /* free extra data */
604 ieee80211_free_keys(sdata
);
606 ieee80211_debugfs_remove_netdev(sdata
);
608 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
609 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
610 sdata
->fragment_next
= 0;
612 switch (sdata
->vif
.type
) {
613 case NL80211_IFTYPE_AP
:
614 beacon
= sdata
->u
.ap
.beacon
;
615 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
619 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
620 local
->total_ps_buffered
--;
625 case NL80211_IFTYPE_MESH_POINT
:
626 if (ieee80211_vif_is_mesh(&sdata
->vif
))
627 mesh_rmc_free(sdata
);
629 case NL80211_IFTYPE_ADHOC
:
630 if (WARN_ON(sdata
->u
.ibss
.presp
))
631 kfree_skb(sdata
->u
.ibss
.presp
);
633 case NL80211_IFTYPE_STATION
:
634 case NL80211_IFTYPE_WDS
:
635 case NL80211_IFTYPE_AP_VLAN
:
636 case NL80211_IFTYPE_MONITOR
:
638 case NL80211_IFTYPE_UNSPECIFIED
:
639 case __NL80211_IFTYPE_AFTER_LAST
:
644 flushed
= sta_info_flush(local
, sdata
);
648 static const struct net_device_ops ieee80211_dataif_ops
= {
649 .ndo_open
= ieee80211_open
,
650 .ndo_stop
= ieee80211_stop
,
651 .ndo_uninit
= ieee80211_teardown_sdata
,
652 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
653 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
654 .ndo_change_mtu
= ieee80211_change_mtu
,
655 .ndo_set_mac_address
= eth_mac_addr
,
658 static const struct net_device_ops ieee80211_monitorif_ops
= {
659 .ndo_open
= ieee80211_open
,
660 .ndo_stop
= ieee80211_stop
,
661 .ndo_uninit
= ieee80211_teardown_sdata
,
662 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
663 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
664 .ndo_change_mtu
= ieee80211_change_mtu
,
665 .ndo_set_mac_address
= eth_mac_addr
,
668 static void ieee80211_if_setup(struct net_device
*dev
)
671 dev
->netdev_ops
= &ieee80211_dataif_ops
;
672 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
673 dev
->destructor
= free_netdev
;
677 * Helper function to initialise an interface to a specific type.
679 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
680 enum nl80211_iftype type
)
682 /* clear type-dependent union */
683 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
685 /* and set some type-dependent values */
686 sdata
->vif
.type
= type
;
687 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
688 sdata
->wdev
.iftype
= type
;
690 /* only monitor differs */
691 sdata
->dev
->type
= ARPHRD_ETHER
;
694 case NL80211_IFTYPE_AP
:
695 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
696 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
698 case NL80211_IFTYPE_STATION
:
699 ieee80211_sta_setup_sdata(sdata
);
701 case NL80211_IFTYPE_ADHOC
:
702 ieee80211_ibss_setup_sdata(sdata
);
704 case NL80211_IFTYPE_MESH_POINT
:
705 if (ieee80211_vif_is_mesh(&sdata
->vif
))
706 ieee80211_mesh_init_sdata(sdata
);
708 case NL80211_IFTYPE_MONITOR
:
709 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
710 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
711 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
712 MONITOR_FLAG_OTHER_BSS
;
714 case NL80211_IFTYPE_WDS
:
715 case NL80211_IFTYPE_AP_VLAN
:
717 case NL80211_IFTYPE_UNSPECIFIED
:
718 case __NL80211_IFTYPE_AFTER_LAST
:
723 ieee80211_debugfs_add_netdev(sdata
);
726 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
727 enum nl80211_iftype type
)
731 if (type
== sdata
->vif
.type
)
734 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
735 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
736 type
== NL80211_IFTYPE_ADHOC
)
740 * We could, here, on changes between IBSS/STA/MESH modes,
741 * invoke an MLME function instead that disassociates etc.
742 * and goes into the requested mode.
745 if (netif_running(sdata
->dev
))
748 /* Purge and reset type-dependent state. */
749 ieee80211_teardown_sdata(sdata
->dev
);
750 ieee80211_setup_sdata(sdata
, type
);
752 /* reset some values that shouldn't be kept across type changes */
753 sdata
->vif
.bss_conf
.basic_rates
=
754 ieee80211_mandatory_rates(sdata
->local
,
755 sdata
->local
->hw
.conf
.channel
->band
);
756 sdata
->drop_unencrypted
= 0;
761 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
762 struct net_device
**new_dev
, enum nl80211_iftype type
,
763 struct vif_params
*params
)
765 struct net_device
*ndev
;
766 struct ieee80211_sub_if_data
*sdata
= NULL
;
771 ndev
= alloc_netdev(sizeof(*sdata
) + local
->hw
.vif_data_size
,
772 name
, ieee80211_if_setup
);
776 ndev
->needed_headroom
= local
->tx_headroom
+
777 4*6 /* four MAC addresses */
778 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
780 + 8 /* rfc1042/bridge tunnel */
781 - ETH_HLEN
/* ethernet hard_header_len */
782 + IEEE80211_ENCRYPT_HEADROOM
;
783 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
785 ret
= dev_alloc_name(ndev
, ndev
->name
);
789 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
790 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
791 ndev
->features
|= NETIF_F_NETNS_LOCAL
;
793 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
794 sdata
= netdev_priv(ndev
);
795 ndev
->ieee80211_ptr
= &sdata
->wdev
;
797 /* initialise type-independent data */
798 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
799 sdata
->local
= local
;
802 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
803 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
805 INIT_LIST_HEAD(&sdata
->key_list
);
807 sdata
->force_unicast_rateidx
= -1;
808 sdata
->max_ratectrl_rateidx
= -1;
810 /* setup type-dependent data */
811 ieee80211_setup_sdata(sdata
, type
);
813 ret
= register_netdevice(ndev
);
817 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
818 params
&& params
->mesh_id_len
)
819 ieee80211_sdata_set_mesh_id(sdata
,
823 mutex_lock(&local
->iflist_mtx
);
824 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
825 mutex_unlock(&local
->iflist_mtx
);
837 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
841 mutex_lock(&sdata
->local
->iflist_mtx
);
842 list_del_rcu(&sdata
->list
);
843 mutex_unlock(&sdata
->local
->iflist_mtx
);
846 unregister_netdevice(sdata
->dev
);
850 * Remove all interfaces, may only be called at hardware unregistration
851 * time because it doesn't do RCU-safe list removals.
853 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
855 struct ieee80211_sub_if_data
*sdata
, *tmp
;
859 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
861 * we cannot hold the iflist_mtx across unregister_netdevice,
862 * but we only need to hold it for list modifications to lock
863 * out readers since we're under the RTNL here as all other
866 mutex_lock(&local
->iflist_mtx
);
867 list_del(&sdata
->list
);
868 mutex_unlock(&local
->iflist_mtx
);
870 unregister_netdevice(sdata
->dev
);
874 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
877 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
880 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
881 printk(KERN_DEBUG
"%s: device no longer idle - %s\n",
882 wiphy_name(local
->hw
.wiphy
), reason
);
885 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
886 return IEEE80211_CONF_CHANGE_IDLE
;
889 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
891 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
894 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
895 printk(KERN_DEBUG
"%s: device now idle\n",
896 wiphy_name(local
->hw
.wiphy
));
899 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
900 return IEEE80211_CONF_CHANGE_IDLE
;
903 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
905 struct ieee80211_sub_if_data
*sdata
;
908 if (local
->hw_scanning
|| local
->sw_scanning
)
909 return ieee80211_idle_off(local
, "scanning");
911 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
912 if (!netif_running(sdata
->dev
))
914 /* do not count disabled managed interfaces */
915 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
916 !sdata
->u
.mgd
.associated
&&
917 list_empty(&sdata
->u
.mgd
.work_list
))
919 /* do not count unused IBSS interfaces */
920 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
921 !sdata
->u
.ibss
.ssid_len
)
923 /* count everything else */
928 return ieee80211_idle_on(local
);
930 return ieee80211_idle_off(local
, "in use");
935 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
939 mutex_lock(&local
->iflist_mtx
);
940 chg
= __ieee80211_recalc_idle(local
);
941 mutex_unlock(&local
->iflist_mtx
);
943 ieee80211_hw_config(local
, chg
);