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
, local
->hw
.conf
.radio_enabled
);
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
,
193 if (compare_ether_addr(null_addr
, local
->mdev
->dev_addr
) == 0)
194 memcpy(local
->mdev
->dev_addr
, local
->hw
.wiphy
->perm_addr
,
198 * Validate the MAC address for this device.
200 if (!is_valid_ether_addr(dev
->dev_addr
)) {
201 if (!local
->open_count
)
203 return -EADDRNOTAVAIL
;
206 switch (sdata
->vif
.type
) {
207 case NL80211_IFTYPE_AP_VLAN
:
208 /* no need to tell driver */
210 case NL80211_IFTYPE_MONITOR
:
211 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
212 local
->cooked_mntrs
++;
216 /* must be before the call to ieee80211_configure_filter */
218 if (local
->monitors
== 1) {
219 local
->hw
.conf
.flags
|= IEEE80211_CONF_RADIOTAP
;
220 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_RADIOTAP
;
223 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
224 local
->fif_fcsfail
++;
225 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
226 local
->fif_plcpfail
++;
227 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
228 local
->fif_control
++;
229 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
230 local
->fif_other_bss
++;
232 netif_addr_lock_bh(local
->mdev
);
233 ieee80211_configure_filter(local
);
234 netif_addr_unlock_bh(local
->mdev
);
236 case NL80211_IFTYPE_STATION
:
237 sdata
->u
.mgd
.flags
&= ~IEEE80211_STA_PREV_BSSID_SET
;
240 conf
.vif
= &sdata
->vif
;
241 conf
.type
= sdata
->vif
.type
;
242 conf
.mac_addr
= dev
->dev_addr
;
243 res
= drv_add_interface(local
, &conf
);
247 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
248 local
->fif_other_bss
++;
249 netif_addr_lock_bh(local
->mdev
);
250 ieee80211_configure_filter(local
);
251 netif_addr_unlock_bh(local
->mdev
);
253 ieee80211_start_mesh(sdata
);
255 changed
|= ieee80211_reset_erp_info(sdata
);
256 ieee80211_bss_info_change_notify(sdata
, changed
);
257 ieee80211_enable_keys(sdata
);
259 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
260 netif_carrier_off(dev
);
262 netif_carrier_on(dev
);
265 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
266 /* Create STA entry for the WDS peer */
267 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
271 goto err_del_interface
;
274 /* no locking required since STA is not live yet */
275 sta
->flags
|= WLAN_STA_AUTHORIZED
;
277 res
= sta_info_insert(sta
);
279 /* STA has been freed */
280 goto err_del_interface
;
284 if (local
->open_count
== 0) {
285 res
= dev_open(local
->mdev
);
288 goto err_del_interface
;
289 tasklet_enable(&local
->tx_pending_tasklet
);
290 tasklet_enable(&local
->tasklet
);
294 * set_multicast_list will be invoked by the networking core
295 * which will check whether any increments here were done in
296 * error and sync them down to the hardware as filter flags.
298 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
299 atomic_inc(&local
->iff_allmultis
);
301 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
302 atomic_inc(&local
->iff_promiscs
);
305 if (hw_reconf_flags
) {
306 ieee80211_hw_config(local
, hw_reconf_flags
);
308 * set default queue parameters so drivers don't
309 * need to initialise the hardware if the hardware
310 * doesn't start up with sane defaults
312 ieee80211_set_wmm_default(sdata
);
315 ieee80211_recalc_ps(local
, -1);
318 * ieee80211_sta_work is disabled while network interface
319 * is down. Therefore, some configuration changes may not
320 * yet be effective. Trigger execution of ieee80211_sta_work
323 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
324 queue_work(local
->hw
.workqueue
, &sdata
->u
.mgd
.work
);
326 netif_tx_start_all_queues(dev
);
330 drv_remove_interface(local
, &conf
);
332 if (!local
->open_count
)
336 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
337 list_del(&sdata
->u
.vlan
.list
);
341 static int ieee80211_stop(struct net_device
*dev
)
343 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
344 struct ieee80211_local
*local
= sdata
->local
;
345 struct ieee80211_if_init_conf conf
;
346 struct sta_info
*sta
;
347 u32 hw_reconf_flags
= 0;
350 * Stop TX on this interface first.
352 netif_tx_stop_all_queues(dev
);
355 * Now delete all active aggregation sessions.
359 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
360 if (sta
->sdata
== sdata
)
361 ieee80211_sta_tear_down_BA_sessions(sta
);
367 * Announce that we are leaving the network, in case we are a
368 * station interface type. This must be done before removing
369 * all stations associated with sta_info_flush, otherwise STA
370 * information will be gone and no announce being done.
372 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
373 if (sdata
->u
.mgd
.state
!= IEEE80211_STA_MLME_DISABLED
)
374 ieee80211_sta_deauthenticate(sdata
,
375 WLAN_REASON_DEAUTH_LEAVING
);
379 * Remove all stations associated with this interface.
381 * This must be done before calling ops->remove_interface()
382 * because otherwise we can later invoke ops->sta_notify()
383 * whenever the STAs are removed, and that invalidates driver
384 * assumptions about always getting a vif pointer that is valid
385 * (because if we remove a STA after ops->remove_interface()
386 * the driver will have removed the vif info already!)
388 * We could relax this and only unlink the stations from the
389 * hash table and list but keep them on a per-sdata list that
390 * will be inserted back again when the interface is brought
391 * up again, but I don't currently see a use case for that,
392 * except with WDS which gets a STA entry created when it is
395 sta_info_flush(local
, sdata
);
398 * Don't count this interface for promisc/allmulti while it
399 * is down. dev_mc_unsync() will invoke set_multicast_list
400 * on the master interface which will sync these down to the
401 * hardware as filter flags.
403 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
404 atomic_dec(&local
->iff_allmultis
);
406 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
407 atomic_dec(&local
->iff_promiscs
);
409 dev_mc_unsync(local
->mdev
, dev
);
410 del_timer_sync(&local
->dynamic_ps_timer
);
411 cancel_work_sync(&local
->dynamic_ps_enable_work
);
413 /* APs need special treatment */
414 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
415 struct ieee80211_sub_if_data
*vlan
, *tmp
;
416 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
419 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
423 /* down all dependent devices, that is VLANs */
424 list_for_each_entry_safe(vlan
, tmp
, &sdata
->u
.ap
.vlans
,
426 dev_close(vlan
->dev
);
427 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
432 switch (sdata
->vif
.type
) {
433 case NL80211_IFTYPE_AP_VLAN
:
434 list_del(&sdata
->u
.vlan
.list
);
435 /* no need to tell driver */
437 case NL80211_IFTYPE_MONITOR
:
438 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
439 local
->cooked_mntrs
--;
444 if (local
->monitors
== 0) {
445 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_RADIOTAP
;
446 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_RADIOTAP
;
449 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
450 local
->fif_fcsfail
--;
451 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
452 local
->fif_plcpfail
--;
453 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
)
454 local
->fif_control
--;
455 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
456 local
->fif_other_bss
--;
458 netif_addr_lock_bh(local
->mdev
);
459 ieee80211_configure_filter(local
);
460 netif_addr_unlock_bh(local
->mdev
);
462 case NL80211_IFTYPE_STATION
:
463 memset(sdata
->u
.mgd
.bssid
, 0, ETH_ALEN
);
464 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
465 del_timer_sync(&sdata
->u
.mgd
.timer
);
467 * If the timer fired while we waited for it, it will have
468 * requeued the work. Now the work will be running again
469 * but will not rearm the timer again because it checks
470 * whether the interface is running, which, at this point,
473 cancel_work_sync(&sdata
->u
.mgd
.work
);
474 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
476 cancel_work_sync(&sdata
->u
.mgd
.beacon_loss_work
);
479 * When we get here, the interface is marked down.
480 * Call synchronize_rcu() to wait for the RX path
481 * should it be using the interface and enqueuing
482 * frames at this very time on another CPU.
485 skb_queue_purge(&sdata
->u
.mgd
.skb_queue
);
487 sdata
->u
.mgd
.flags
&= ~(IEEE80211_STA_PRIVACY_INVOKED
|
488 IEEE80211_STA_TKIP_WEP_USED
);
489 kfree(sdata
->u
.mgd
.extra_ie
);
490 sdata
->u
.mgd
.extra_ie
= NULL
;
491 sdata
->u
.mgd
.extra_ie_len
= 0;
493 case NL80211_IFTYPE_ADHOC
:
494 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
495 del_timer_sync(&sdata
->u
.ibss
.timer
);
496 cancel_work_sync(&sdata
->u
.ibss
.work
);
498 skb_queue_purge(&sdata
->u
.ibss
.skb_queue
);
501 case NL80211_IFTYPE_MESH_POINT
:
502 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
503 /* other_bss and allmulti are always set on mesh
505 local
->fif_other_bss
--;
506 atomic_dec(&local
->iff_allmultis
);
508 netif_addr_lock_bh(local
->mdev
);
509 ieee80211_configure_filter(local
);
510 netif_addr_unlock_bh(local
->mdev
);
512 ieee80211_stop_mesh(sdata
);
516 if (local
->scan_sdata
== sdata
) {
517 if (!local
->ops
->hw_scan
)
518 cancel_delayed_work_sync(&local
->scan_work
);
520 * The software scan can no longer run now, so we can
521 * clear out the scan_sdata reference. However, the
522 * hardware scan may still be running. The complete
523 * function must be prepared to handle a NULL value.
525 local
->scan_sdata
= NULL
;
527 * The memory barrier guarantees that another CPU
528 * that is hardware-scanning will now see the fact
529 * that this interface is gone.
533 * If software scanning, complete the scan but since
534 * the scan_sdata is NULL already don't send out a
535 * scan event to userspace -- the scan is incomplete.
537 if (local
->sw_scanning
)
538 ieee80211_scan_completed(&local
->hw
, true);
541 conf
.vif
= &sdata
->vif
;
542 conf
.type
= sdata
->vif
.type
;
543 conf
.mac_addr
= dev
->dev_addr
;
544 /* disable all keys for as long as this netdev is down */
545 ieee80211_disable_keys(sdata
);
546 drv_remove_interface(local
, &conf
);
551 if (local
->open_count
== 0) {
552 if (netif_running(local
->mdev
))
553 dev_close(local
->mdev
);
557 ieee80211_led_radio(local
, 0);
559 flush_workqueue(local
->hw
.workqueue
);
561 tasklet_disable(&local
->tx_pending_tasklet
);
562 tasklet_disable(&local
->tasklet
);
564 /* no reconfiguring after stop! */
568 ieee80211_recalc_ps(local
, -1);
570 /* do after stop to avoid reconfiguring when we stop anyway */
572 ieee80211_hw_config(local
, hw_reconf_flags
);
577 static void ieee80211_set_multicast_list(struct net_device
*dev
)
579 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
580 struct ieee80211_local
*local
= sdata
->local
;
581 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
583 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
584 promisc
= !!(dev
->flags
& IFF_PROMISC
);
585 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
586 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
588 if (allmulti
!= sdata_allmulti
) {
589 if (dev
->flags
& IFF_ALLMULTI
)
590 atomic_inc(&local
->iff_allmultis
);
592 atomic_dec(&local
->iff_allmultis
);
593 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
596 if (promisc
!= sdata_promisc
) {
597 if (dev
->flags
& IFF_PROMISC
)
598 atomic_inc(&local
->iff_promiscs
);
600 atomic_dec(&local
->iff_promiscs
);
601 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
604 dev_mc_sync(local
->mdev
, dev
);
608 * Called when the netdev is removed or, by the code below, before
609 * the interface type changes.
611 static void ieee80211_teardown_sdata(struct net_device
*dev
)
613 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
614 struct ieee80211_local
*local
= sdata
->local
;
615 struct beacon_data
*beacon
;
620 /* free extra data */
621 ieee80211_free_keys(sdata
);
623 ieee80211_debugfs_remove_netdev(sdata
);
625 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
626 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
627 sdata
->fragment_next
= 0;
629 switch (sdata
->vif
.type
) {
630 case NL80211_IFTYPE_AP
:
631 beacon
= sdata
->u
.ap
.beacon
;
632 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
636 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
637 local
->total_ps_buffered
--;
642 case NL80211_IFTYPE_MESH_POINT
:
643 if (ieee80211_vif_is_mesh(&sdata
->vif
))
644 mesh_rmc_free(sdata
);
646 case NL80211_IFTYPE_ADHOC
:
647 if (WARN_ON(sdata
->u
.ibss
.presp
))
648 kfree_skb(sdata
->u
.ibss
.presp
);
650 case NL80211_IFTYPE_STATION
:
651 kfree(sdata
->u
.mgd
.extra_ie
);
652 kfree(sdata
->u
.mgd
.assocreq_ies
);
653 kfree(sdata
->u
.mgd
.assocresp_ies
);
654 kfree(sdata
->u
.mgd
.sme_auth_ie
);
656 case NL80211_IFTYPE_WDS
:
657 case NL80211_IFTYPE_AP_VLAN
:
658 case NL80211_IFTYPE_MONITOR
:
660 case NL80211_IFTYPE_UNSPECIFIED
:
661 case __NL80211_IFTYPE_AFTER_LAST
:
666 flushed
= sta_info_flush(local
, sdata
);
670 static const struct net_device_ops ieee80211_dataif_ops
= {
671 .ndo_open
= ieee80211_open
,
672 .ndo_stop
= ieee80211_stop
,
673 .ndo_uninit
= ieee80211_teardown_sdata
,
674 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
675 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
676 .ndo_change_mtu
= ieee80211_change_mtu
,
677 .ndo_set_mac_address
= eth_mac_addr
,
680 static const struct net_device_ops ieee80211_monitorif_ops
= {
681 .ndo_open
= ieee80211_open
,
682 .ndo_stop
= ieee80211_stop
,
683 .ndo_uninit
= ieee80211_teardown_sdata
,
684 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
685 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
686 .ndo_change_mtu
= ieee80211_change_mtu
,
687 .ndo_set_mac_address
= eth_mac_addr
,
690 static void ieee80211_if_setup(struct net_device
*dev
)
693 dev
->netdev_ops
= &ieee80211_dataif_ops
;
694 dev
->wireless_handlers
= &ieee80211_iw_handler_def
;
695 dev
->destructor
= free_netdev
;
699 * Helper function to initialise an interface to a specific type.
701 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
702 enum nl80211_iftype type
)
704 /* clear type-dependent union */
705 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
707 /* and set some type-dependent values */
708 sdata
->vif
.type
= type
;
709 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
710 sdata
->wdev
.iftype
= type
;
712 /* only monitor differs */
713 sdata
->dev
->type
= ARPHRD_ETHER
;
716 case NL80211_IFTYPE_AP
:
717 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
718 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
720 case NL80211_IFTYPE_STATION
:
721 ieee80211_sta_setup_sdata(sdata
);
723 case NL80211_IFTYPE_ADHOC
:
724 ieee80211_ibss_setup_sdata(sdata
);
726 case NL80211_IFTYPE_MESH_POINT
:
727 if (ieee80211_vif_is_mesh(&sdata
->vif
))
728 ieee80211_mesh_init_sdata(sdata
);
730 case NL80211_IFTYPE_MONITOR
:
731 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
732 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
733 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
734 MONITOR_FLAG_OTHER_BSS
;
736 case NL80211_IFTYPE_WDS
:
737 case NL80211_IFTYPE_AP_VLAN
:
739 case NL80211_IFTYPE_UNSPECIFIED
:
740 case __NL80211_IFTYPE_AFTER_LAST
:
745 ieee80211_debugfs_add_netdev(sdata
);
748 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
749 enum nl80211_iftype type
)
753 if (type
== sdata
->vif
.type
)
756 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
757 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
758 type
== NL80211_IFTYPE_ADHOC
)
762 * We could, here, on changes between IBSS/STA/MESH modes,
763 * invoke an MLME function instead that disassociates etc.
764 * and goes into the requested mode.
767 if (netif_running(sdata
->dev
))
770 /* Purge and reset type-dependent state. */
771 ieee80211_teardown_sdata(sdata
->dev
);
772 ieee80211_setup_sdata(sdata
, type
);
774 /* reset some values that shouldn't be kept across type changes */
775 sdata
->vif
.bss_conf
.basic_rates
=
776 ieee80211_mandatory_rates(sdata
->local
,
777 sdata
->local
->hw
.conf
.channel
->band
);
778 sdata
->drop_unencrypted
= 0;
783 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
784 struct net_device
**new_dev
, enum nl80211_iftype type
,
785 struct vif_params
*params
)
787 struct net_device
*ndev
;
788 struct ieee80211_sub_if_data
*sdata
= NULL
;
793 ndev
= alloc_netdev(sizeof(*sdata
) + local
->hw
.vif_data_size
,
794 name
, ieee80211_if_setup
);
798 ndev
->needed_headroom
= local
->tx_headroom
+
799 4*6 /* four MAC addresses */
800 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
802 + 8 /* rfc1042/bridge tunnel */
803 - ETH_HLEN
/* ethernet hard_header_len */
804 + IEEE80211_ENCRYPT_HEADROOM
;
805 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
807 ret
= dev_alloc_name(ndev
, ndev
->name
);
811 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
812 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
813 ndev
->features
|= NETIF_F_NETNS_LOCAL
;
815 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
816 sdata
= netdev_priv(ndev
);
817 ndev
->ieee80211_ptr
= &sdata
->wdev
;
819 /* initialise type-independent data */
820 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
821 sdata
->local
= local
;
824 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
825 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
827 INIT_LIST_HEAD(&sdata
->key_list
);
829 sdata
->force_unicast_rateidx
= -1;
830 sdata
->max_ratectrl_rateidx
= -1;
832 /* setup type-dependent data */
833 ieee80211_setup_sdata(sdata
, type
);
835 ret
= register_netdevice(ndev
);
839 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
840 params
&& params
->mesh_id_len
)
841 ieee80211_sdata_set_mesh_id(sdata
,
845 mutex_lock(&local
->iflist_mtx
);
846 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
847 mutex_unlock(&local
->iflist_mtx
);
859 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
863 mutex_lock(&sdata
->local
->iflist_mtx
);
864 list_del_rcu(&sdata
->list
);
865 mutex_unlock(&sdata
->local
->iflist_mtx
);
868 unregister_netdevice(sdata
->dev
);
872 * Remove all interfaces, may only be called at hardware unregistration
873 * time because it doesn't do RCU-safe list removals.
875 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
877 struct ieee80211_sub_if_data
*sdata
, *tmp
;
881 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
883 * we cannot hold the iflist_mtx across unregister_netdevice,
884 * but we only need to hold it for list modifications to lock
885 * out readers since we're under the RTNL here as all other
888 mutex_lock(&local
->iflist_mtx
);
889 list_del(&sdata
->list
);
890 mutex_unlock(&local
->iflist_mtx
);
892 unregister_netdevice(sdata
->dev
);