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/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
22 #include "debugfs_netdev.h"
25 #include "driver-ops.h"
30 * DOC: Interface list locking
32 * The interface list in each struct ieee80211_local is protected
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
46 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
49 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
51 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
53 /* FIX: what would be proper limits for MTU?
54 * This interface uses 802.3 frames. */
56 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
60 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
61 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
62 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
67 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
69 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
70 struct sockaddr
*sa
= addr
;
73 if (ieee80211_sdata_running(sdata
))
76 ret
= eth_mac_addr(dev
, sa
);
79 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
84 static inline int identical_mac_addr_allowed(int type1
, int type2
)
86 return type1
== NL80211_IFTYPE_MONITOR
||
87 type2
== NL80211_IFTYPE_MONITOR
||
88 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
89 (type1
== NL80211_IFTYPE_WDS
&&
90 (type2
== NL80211_IFTYPE_WDS
||
91 type2
== NL80211_IFTYPE_AP
)) ||
92 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
93 (type1
== NL80211_IFTYPE_AP_VLAN
&&
94 (type2
== NL80211_IFTYPE_AP
||
95 type2
== NL80211_IFTYPE_AP_VLAN
));
98 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
99 enum nl80211_iftype iftype
)
101 struct ieee80211_local
*local
= sdata
->local
;
102 struct ieee80211_sub_if_data
*nsdata
;
103 struct net_device
*dev
= sdata
->dev
;
107 /* we hold the RTNL here so can safely walk the list */
108 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
109 struct net_device
*ndev
= nsdata
->dev
;
111 if (ndev
!= dev
&& ieee80211_sdata_running(nsdata
)) {
113 * Allow only a single IBSS interface to be up at any
114 * time. This is restricted because beacon distribution
115 * cannot work properly if both are in the same IBSS.
117 * To remove this restriction we'd have to disallow them
118 * from setting the same SSID on different IBSS interfaces
119 * belonging to the same hardware. Then, however, we're
120 * faced with having to adopt two different TSF timers...
122 if (iftype
== NL80211_IFTYPE_ADHOC
&&
123 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
127 * The remaining checks are only performed for interfaces
128 * with the same MAC address.
130 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
134 * check whether it may have the same address
136 if (!identical_mac_addr_allowed(iftype
,
141 * can only add VLANs to enabled APs
143 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
144 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
145 sdata
->bss
= &nsdata
->u
.ap
;
152 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
155 struct ieee80211_local
*local
= sdata
->local
;
156 u32 flags
= sdata
->u
.mntr_flags
;
158 #define ADJUST(_f, _s) do { \
159 if (flags & MONITOR_FLAG_##_f) \
160 local->fif_##_s += offset; \
163 ADJUST(FCSFAIL
, fcsfail
);
164 ADJUST(PLCPFAIL
, plcpfail
);
165 ADJUST(CONTROL
, control
);
166 ADJUST(CONTROL
, pspoll
);
167 ADJUST(OTHER_BSS
, other_bss
);
173 * NOTE: Be very careful when changing this function, it must NOT return
174 * an error on interface type changes that have been pre-checked, so most
175 * checks should be in ieee80211_check_concurrent_iface.
177 static int ieee80211_do_open(struct net_device
*dev
, bool coming_up
)
179 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
180 struct ieee80211_local
*local
= sdata
->local
;
181 struct sta_info
*sta
;
184 u32 hw_reconf_flags
= 0;
186 switch (sdata
->vif
.type
) {
187 case NL80211_IFTYPE_WDS
:
188 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
191 case NL80211_IFTYPE_AP_VLAN
: {
192 struct ieee80211_sub_if_data
*master
;
197 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
199 master
= container_of(sdata
->bss
,
200 struct ieee80211_sub_if_data
, u
.ap
);
201 sdata
->control_port_protocol
=
202 master
->control_port_protocol
;
203 sdata
->control_port_no_encrypt
=
204 master
->control_port_no_encrypt
;
207 case NL80211_IFTYPE_AP
:
208 sdata
->bss
= &sdata
->u
.ap
;
210 case NL80211_IFTYPE_MESH_POINT
:
211 case NL80211_IFTYPE_STATION
:
212 case NL80211_IFTYPE_MONITOR
:
213 case NL80211_IFTYPE_ADHOC
:
214 /* no special treatment */
216 case NL80211_IFTYPE_UNSPECIFIED
:
217 case NUM_NL80211_IFTYPES
:
218 case NL80211_IFTYPE_P2P_CLIENT
:
219 case NL80211_IFTYPE_P2P_GO
:
225 if (local
->open_count
== 0) {
226 res
= drv_start(local
);
229 if (local
->ops
->napi_poll
)
230 napi_enable(&local
->napi
);
231 /* we're brought up, everything changes */
232 hw_reconf_flags
= ~0;
233 ieee80211_led_radio(local
, true);
234 ieee80211_mod_tpt_led_trig(local
,
235 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
239 * Copy the hopefully now-present MAC address to
240 * this interface, if it has the special null one.
242 if (is_zero_ether_addr(dev
->dev_addr
)) {
243 memcpy(dev
->dev_addr
,
244 local
->hw
.wiphy
->perm_addr
,
246 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
248 if (!is_valid_ether_addr(dev
->dev_addr
)) {
249 if (!local
->open_count
)
251 return -EADDRNOTAVAIL
;
255 switch (sdata
->vif
.type
) {
256 case NL80211_IFTYPE_AP_VLAN
:
257 /* no need to tell driver */
259 case NL80211_IFTYPE_MONITOR
:
260 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
261 local
->cooked_mntrs
++;
265 /* must be before the call to ieee80211_configure_filter */
267 if (local
->monitors
== 1) {
268 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
269 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
272 ieee80211_adjust_monitor_flags(sdata
, 1);
273 ieee80211_configure_filter(local
);
275 netif_carrier_on(dev
);
279 res
= drv_add_interface(local
, sdata
);
284 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
286 local
->fif_probe_req
++;
288 ieee80211_configure_filter(local
);
289 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
290 local
->fif_probe_req
++;
293 changed
|= ieee80211_reset_erp_info(sdata
);
294 ieee80211_bss_info_change_notify(sdata
, changed
);
296 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
||
297 sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
298 netif_carrier_off(dev
);
300 netif_carrier_on(dev
);
303 * set default queue parameters so drivers don't
304 * need to initialise the hardware if the hardware
305 * doesn't start up with sane defaults
307 ieee80211_set_wmm_default(sdata
);
310 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
312 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
313 /* Create STA entry for the WDS peer */
314 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
318 goto err_del_interface
;
321 /* no atomic bitop required since STA is not live yet */
322 set_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
324 res
= sta_info_insert(sta
);
326 /* STA has been freed */
327 goto err_del_interface
;
330 rate_control_rate_init(sta
);
334 * set_multicast_list will be invoked by the networking core
335 * which will check whether any increments here were done in
336 * error and sync them down to the hardware as filter flags.
338 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
339 atomic_inc(&local
->iff_allmultis
);
341 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
342 atomic_inc(&local
->iff_promiscs
);
344 mutex_lock(&local
->mtx
);
345 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
346 mutex_unlock(&local
->mtx
);
352 ieee80211_hw_config(local
, hw_reconf_flags
);
354 ieee80211_recalc_ps(local
, -1);
356 netif_tx_start_all_queues(dev
);
360 drv_remove_interface(local
, sdata
);
362 if (!local
->open_count
)
366 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
367 list_del(&sdata
->u
.vlan
.list
);
368 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
372 static int ieee80211_open(struct net_device
*dev
)
374 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
377 /* fail early if user set an invalid address */
378 if (!is_valid_ether_addr(dev
->dev_addr
))
379 return -EADDRNOTAVAIL
;
381 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
385 return ieee80211_do_open(dev
, true);
388 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
391 struct ieee80211_local
*local
= sdata
->local
;
393 struct sk_buff
*skb
, *tmp
;
394 u32 hw_reconf_flags
= 0;
396 enum nl80211_channel_type orig_ct
;
398 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
400 if (local
->scan_sdata
== sdata
)
401 ieee80211_scan_cancel(local
);
404 * Stop TX on this interface first.
406 netif_tx_stop_all_queues(sdata
->dev
);
409 * Purge work for this interface.
411 ieee80211_work_purge(sdata
);
414 * Remove all stations associated with this interface.
416 * This must be done before calling ops->remove_interface()
417 * because otherwise we can later invoke ops->sta_notify()
418 * whenever the STAs are removed, and that invalidates driver
419 * assumptions about always getting a vif pointer that is valid
420 * (because if we remove a STA after ops->remove_interface()
421 * the driver will have removed the vif info already!)
423 * This is relevant only in AP, WDS and mesh modes, since in
424 * all other modes we've already removed all stations when
427 sta_info_flush(local
, sdata
);
430 * Don't count this interface for promisc/allmulti while it
431 * is down. dev_mc_unsync() will invoke set_multicast_list
432 * on the master interface which will sync these down to the
433 * hardware as filter flags.
435 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
436 atomic_dec(&local
->iff_allmultis
);
438 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
439 atomic_dec(&local
->iff_promiscs
);
441 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
443 local
->fif_probe_req
--;
444 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
445 local
->fif_probe_req
--;
448 netif_addr_lock_bh(sdata
->dev
);
449 spin_lock_bh(&local
->filter_lock
);
450 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
451 sdata
->dev
->addr_len
);
452 spin_unlock_bh(&local
->filter_lock
);
453 netif_addr_unlock_bh(sdata
->dev
);
455 ieee80211_configure_filter(local
);
457 del_timer_sync(&local
->dynamic_ps_timer
);
458 cancel_work_sync(&local
->dynamic_ps_enable_work
);
460 /* APs need special treatment */
461 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
462 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
463 struct beacon_data
*old_beacon
=
464 rtnl_dereference(sdata
->u
.ap
.beacon
);
465 struct sk_buff
*old_probe_resp
=
466 rtnl_dereference(sdata
->u
.ap
.probe_resp
);
468 /* sdata_running will return false, so this will disable */
469 ieee80211_bss_info_change_notify(sdata
,
470 BSS_CHANGED_BEACON_ENABLED
);
472 /* remove beacon and probe response */
473 RCU_INIT_POINTER(sdata
->u
.ap
.beacon
, NULL
);
474 RCU_INIT_POINTER(sdata
->u
.ap
.probe_resp
, NULL
);
477 kfree(old_probe_resp
);
479 /* down all dependent devices, that is VLANs */
480 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
482 dev_close(vlan
->dev
);
483 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
485 /* free all potentially still buffered bcast frames */
486 local
->total_ps_buffered
-= skb_queue_len(&sdata
->u
.ap
.ps_bc_buf
);
487 skb_queue_purge(&sdata
->u
.ap
.ps_bc_buf
);
493 switch (sdata
->vif
.type
) {
494 case NL80211_IFTYPE_AP_VLAN
:
495 list_del(&sdata
->u
.vlan
.list
);
496 /* no need to tell driver */
498 case NL80211_IFTYPE_MONITOR
:
499 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
500 local
->cooked_mntrs
--;
505 if (local
->monitors
== 0) {
506 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
507 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
510 ieee80211_adjust_monitor_flags(sdata
, -1);
511 ieee80211_configure_filter(local
);
514 flush_work(&sdata
->work
);
516 * When we get here, the interface is marked down.
517 * Call synchronize_rcu() to wait for the RX path
518 * should it be using the interface and enqueuing
519 * frames at this very time on another CPU.
522 skb_queue_purge(&sdata
->skb_queue
);
525 * Disable beaconing here for mesh only, AP and IBSS
526 * are already taken care of.
528 if (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
529 ieee80211_bss_info_change_notify(sdata
,
530 BSS_CHANGED_BEACON_ENABLED
);
533 * Free all remaining keys, there shouldn't be any,
534 * except maybe group keys in AP more or WDS?
536 ieee80211_free_keys(sdata
);
539 drv_remove_interface(local
, sdata
);
544 mutex_lock(&local
->mtx
);
545 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
546 mutex_unlock(&local
->mtx
);
548 ieee80211_recalc_ps(local
, -1);
550 if (local
->open_count
== 0) {
551 if (local
->ops
->napi_poll
)
552 napi_disable(&local
->napi
);
553 ieee80211_clear_tx_pending(local
);
554 ieee80211_stop_device(local
);
556 /* no reconfiguring after stop! */
560 /* Re-calculate channel-type, in case there are multiple vifs
561 * on different channel types.
563 orig_ct
= local
->_oper_channel_type
;
564 ieee80211_set_channel_type(local
, NULL
, NL80211_CHAN_NO_HT
);
566 /* do after stop to avoid reconfiguring when we stop anyway */
567 if (hw_reconf_flags
|| (orig_ct
!= local
->_oper_channel_type
))
568 ieee80211_hw_config(local
, hw_reconf_flags
);
570 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
571 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
572 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
573 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
574 if (info
->control
.vif
== &sdata
->vif
) {
575 __skb_unlink(skb
, &local
->pending
[i
]);
576 dev_kfree_skb_irq(skb
);
580 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
583 static int ieee80211_stop(struct net_device
*dev
)
585 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
587 ieee80211_do_stop(sdata
, true);
592 static void ieee80211_set_multicast_list(struct net_device
*dev
)
594 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
595 struct ieee80211_local
*local
= sdata
->local
;
596 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
598 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
599 promisc
= !!(dev
->flags
& IFF_PROMISC
);
600 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
601 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
603 if (allmulti
!= sdata_allmulti
) {
604 if (dev
->flags
& IFF_ALLMULTI
)
605 atomic_inc(&local
->iff_allmultis
);
607 atomic_dec(&local
->iff_allmultis
);
608 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
611 if (promisc
!= sdata_promisc
) {
612 if (dev
->flags
& IFF_PROMISC
)
613 atomic_inc(&local
->iff_promiscs
);
615 atomic_dec(&local
->iff_promiscs
);
616 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
618 spin_lock_bh(&local
->filter_lock
);
619 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
620 spin_unlock_bh(&local
->filter_lock
);
621 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
625 * Called when the netdev is removed or, by the code below, before
626 * the interface type changes.
628 static void ieee80211_teardown_sdata(struct net_device
*dev
)
630 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
631 struct ieee80211_local
*local
= sdata
->local
;
635 /* free extra data */
636 ieee80211_free_keys(sdata
);
638 ieee80211_debugfs_remove_netdev(sdata
);
640 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
641 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
642 sdata
->fragment_next
= 0;
644 if (ieee80211_vif_is_mesh(&sdata
->vif
))
645 mesh_rmc_free(sdata
);
647 flushed
= sta_info_flush(local
, sdata
);
651 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
654 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
657 static const struct net_device_ops ieee80211_dataif_ops
= {
658 .ndo_open
= ieee80211_open
,
659 .ndo_stop
= ieee80211_stop
,
660 .ndo_uninit
= ieee80211_teardown_sdata
,
661 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
662 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
663 .ndo_change_mtu
= ieee80211_change_mtu
,
664 .ndo_set_mac_address
= ieee80211_change_mac
,
665 .ndo_select_queue
= ieee80211_netdev_select_queue
,
668 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
671 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
672 struct ieee80211_local
*local
= sdata
->local
;
673 struct ieee80211_hdr
*hdr
;
674 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
677 if (local
->hw
.queues
< 4)
681 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
682 return 0; /* doesn't matter, frame will be dropped */
684 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
686 if (!ieee80211_is_data(hdr
->frame_control
)) {
688 return ieee802_1d_to_ac
[skb
->priority
];
690 if (!ieee80211_is_data_qos(hdr
->frame_control
)) {
692 return ieee802_1d_to_ac
[skb
->priority
];
695 p
= ieee80211_get_qos_ctl(hdr
);
696 skb
->priority
= *p
& IEEE80211_QOS_CTL_TAG1D_MASK
;
698 return ieee80211_downgrade_queue(local
, skb
);
701 static const struct net_device_ops ieee80211_monitorif_ops
= {
702 .ndo_open
= ieee80211_open
,
703 .ndo_stop
= ieee80211_stop
,
704 .ndo_uninit
= ieee80211_teardown_sdata
,
705 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
706 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
707 .ndo_change_mtu
= ieee80211_change_mtu
,
708 .ndo_set_mac_address
= eth_mac_addr
,
709 .ndo_select_queue
= ieee80211_monitor_select_queue
,
712 static void ieee80211_if_setup(struct net_device
*dev
)
715 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
716 dev
->netdev_ops
= &ieee80211_dataif_ops
;
717 dev
->destructor
= free_netdev
;
720 static void ieee80211_iface_work(struct work_struct
*work
)
722 struct ieee80211_sub_if_data
*sdata
=
723 container_of(work
, struct ieee80211_sub_if_data
, work
);
724 struct ieee80211_local
*local
= sdata
->local
;
726 struct sta_info
*sta
;
727 struct ieee80211_ra_tid
*ra_tid
;
729 if (!ieee80211_sdata_running(sdata
))
736 * ieee80211_queue_work() should have picked up most cases,
737 * here we'll pick the rest.
739 if (WARN(local
->suspended
,
740 "interface work scheduled while going to suspend\n"))
743 /* first process frames */
744 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
745 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
747 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
748 ra_tid
= (void *)&skb
->cb
;
749 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
751 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
752 ra_tid
= (void *)&skb
->cb
;
753 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
755 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
756 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
759 mutex_lock(&local
->sta_mtx
);
760 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
762 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
763 case WLAN_ACTION_ADDBA_REQ
:
764 ieee80211_process_addba_request(
765 local
, sta
, mgmt
, len
);
767 case WLAN_ACTION_ADDBA_RESP
:
768 ieee80211_process_addba_resp(local
, sta
,
771 case WLAN_ACTION_DELBA
:
772 ieee80211_process_delba(sdata
, sta
,
780 mutex_unlock(&local
->sta_mtx
);
781 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
782 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
784 * So the frame isn't mgmt, but frame_control
785 * is at the right place anyway, of course, so
786 * the if statement is correct.
788 * Warn if we have other data frame types here,
789 * they must not get here.
791 WARN_ON(hdr
->frame_control
&
792 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
793 WARN_ON(!(hdr
->seq_ctrl
&
794 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
796 * This was a fragment of a frame, received while
797 * a block-ack session was active. That cannot be
798 * right, so terminate the session.
800 mutex_lock(&local
->sta_mtx
);
801 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
803 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
804 IEEE80211_QOS_CTL_TID_MASK
;
806 __ieee80211_stop_rx_ba_session(
807 sta
, tid
, WLAN_BACK_RECIPIENT
,
808 WLAN_REASON_QSTA_REQUIRE_SETUP
,
811 mutex_unlock(&local
->sta_mtx
);
812 } else switch (sdata
->vif
.type
) {
813 case NL80211_IFTYPE_STATION
:
814 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
816 case NL80211_IFTYPE_ADHOC
:
817 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
819 case NL80211_IFTYPE_MESH_POINT
:
820 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
822 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
825 WARN(1, "frame for unexpected interface type");
832 /* then other type-dependent work */
833 switch (sdata
->vif
.type
) {
834 case NL80211_IFTYPE_STATION
:
835 ieee80211_sta_work(sdata
);
837 case NL80211_IFTYPE_ADHOC
:
838 ieee80211_ibss_work(sdata
);
840 case NL80211_IFTYPE_MESH_POINT
:
841 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
843 ieee80211_mesh_work(sdata
);
852 * Helper function to initialise an interface to a specific type.
854 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
855 enum nl80211_iftype type
)
857 /* clear type-dependent union */
858 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
860 /* and set some type-dependent values */
861 sdata
->vif
.type
= type
;
862 sdata
->vif
.p2p
= false;
863 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
864 sdata
->wdev
.iftype
= type
;
866 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
867 sdata
->control_port_no_encrypt
= false;
869 /* only monitor differs */
870 sdata
->dev
->type
= ARPHRD_ETHER
;
872 skb_queue_head_init(&sdata
->skb_queue
);
873 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
876 case NL80211_IFTYPE_P2P_GO
:
877 type
= NL80211_IFTYPE_AP
;
878 sdata
->vif
.type
= type
;
879 sdata
->vif
.p2p
= true;
881 case NL80211_IFTYPE_AP
:
882 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
883 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
885 case NL80211_IFTYPE_P2P_CLIENT
:
886 type
= NL80211_IFTYPE_STATION
;
887 sdata
->vif
.type
= type
;
888 sdata
->vif
.p2p
= true;
890 case NL80211_IFTYPE_STATION
:
891 ieee80211_sta_setup_sdata(sdata
);
893 case NL80211_IFTYPE_ADHOC
:
894 ieee80211_ibss_setup_sdata(sdata
);
896 case NL80211_IFTYPE_MESH_POINT
:
897 if (ieee80211_vif_is_mesh(&sdata
->vif
))
898 ieee80211_mesh_init_sdata(sdata
);
900 case NL80211_IFTYPE_MONITOR
:
901 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
902 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
903 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
904 MONITOR_FLAG_OTHER_BSS
;
906 case NL80211_IFTYPE_WDS
:
907 case NL80211_IFTYPE_AP_VLAN
:
909 case NL80211_IFTYPE_UNSPECIFIED
:
910 case NUM_NL80211_IFTYPES
:
915 ieee80211_debugfs_add_netdev(sdata
);
918 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
919 enum nl80211_iftype type
)
921 struct ieee80211_local
*local
= sdata
->local
;
923 enum nl80211_iftype internal_type
= type
;
928 if (!local
->ops
->change_interface
)
931 switch (sdata
->vif
.type
) {
932 case NL80211_IFTYPE_AP
:
933 case NL80211_IFTYPE_STATION
:
934 case NL80211_IFTYPE_ADHOC
:
936 * Could maybe also all others here?
937 * Just not sure how that interacts
938 * with the RX/config path e.g. for
947 case NL80211_IFTYPE_AP
:
948 case NL80211_IFTYPE_STATION
:
949 case NL80211_IFTYPE_ADHOC
:
951 * Could probably support everything
952 * but WDS here (WDS do_open can fail
953 * under memory pressure, which this
954 * code isn't prepared to handle).
957 case NL80211_IFTYPE_P2P_CLIENT
:
959 internal_type
= NL80211_IFTYPE_STATION
;
961 case NL80211_IFTYPE_P2P_GO
:
963 internal_type
= NL80211_IFTYPE_AP
;
969 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
973 ieee80211_do_stop(sdata
, false);
975 ieee80211_teardown_sdata(sdata
->dev
);
977 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
979 type
= sdata
->vif
.type
;
981 ieee80211_setup_sdata(sdata
, type
);
983 err
= ieee80211_do_open(sdata
->dev
, false);
984 WARN(err
, "type change: do_open returned %d", err
);
989 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
990 enum nl80211_iftype type
)
996 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
999 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
1000 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
1001 type
== NL80211_IFTYPE_ADHOC
)
1004 if (ieee80211_sdata_running(sdata
)) {
1005 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1009 /* Purge and reset type-dependent state. */
1010 ieee80211_teardown_sdata(sdata
->dev
);
1011 ieee80211_setup_sdata(sdata
, type
);
1014 /* reset some values that shouldn't be kept across type changes */
1015 sdata
->vif
.bss_conf
.basic_rates
=
1016 ieee80211_mandatory_rates(sdata
->local
,
1017 sdata
->local
->hw
.conf
.channel
->band
);
1018 sdata
->drop_unencrypted
= 0;
1019 if (type
== NL80211_IFTYPE_STATION
)
1020 sdata
->u
.mgd
.use_4addr
= false;
1025 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1026 struct net_device
*dev
,
1027 enum nl80211_iftype type
)
1029 struct ieee80211_sub_if_data
*sdata
;
1030 u64 mask
, start
, addr
, val
, inc
;
1032 u8 tmp_addr
[ETH_ALEN
];
1035 /* default ... something at least */
1036 memcpy(dev
->perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1038 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1039 local
->hw
.wiphy
->n_addresses
<= 1)
1043 mutex_lock(&local
->iflist_mtx
);
1046 case NL80211_IFTYPE_MONITOR
:
1047 /* doesn't matter */
1049 case NL80211_IFTYPE_WDS
:
1050 case NL80211_IFTYPE_AP_VLAN
:
1051 /* match up with an AP interface */
1052 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1053 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1055 memcpy(dev
->perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1058 /* keep default if no AP interface present */
1061 /* assign a new address if possible -- try n_addresses first */
1062 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1065 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1066 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1067 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1074 memcpy(dev
->perm_addr
,
1075 local
->hw
.wiphy
->addresses
[i
].addr
,
1081 /* try mask if available */
1082 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1085 m
= local
->hw
.wiphy
->addr_mask
;
1086 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1087 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1088 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1090 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1091 /* not a contiguous mask ... not handled now! */
1092 printk(KERN_DEBUG
"not contiguous\n");
1096 m
= local
->hw
.wiphy
->perm_addr
;
1097 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1098 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1099 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1101 inc
= 1ULL<<__ffs64(mask
);
1102 val
= (start
& mask
);
1103 addr
= (start
& ~mask
) | (val
& mask
);
1107 tmp_addr
[5] = addr
>> 0*8;
1108 tmp_addr
[4] = addr
>> 1*8;
1109 tmp_addr
[3] = addr
>> 2*8;
1110 tmp_addr
[2] = addr
>> 3*8;
1111 tmp_addr
[1] = addr
>> 4*8;
1112 tmp_addr
[0] = addr
>> 5*8;
1116 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1117 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1125 memcpy(dev
->perm_addr
, tmp_addr
, ETH_ALEN
);
1128 addr
= (start
& ~mask
) | (val
& mask
);
1129 } while (addr
!= start
);
1134 mutex_unlock(&local
->iflist_mtx
);
1137 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1138 struct net_device
**new_dev
, enum nl80211_iftype type
,
1139 struct vif_params
*params
)
1141 struct net_device
*ndev
;
1142 struct ieee80211_sub_if_data
*sdata
= NULL
;
1147 ndev
= alloc_netdev_mqs(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1148 name
, ieee80211_if_setup
, local
->hw
.queues
, 1);
1151 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1153 ndev
->needed_headroom
= local
->tx_headroom
+
1154 4*6 /* four MAC addresses */
1155 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1157 + 8 /* rfc1042/bridge tunnel */
1158 - ETH_HLEN
/* ethernet hard_header_len */
1159 + IEEE80211_ENCRYPT_HEADROOM
;
1160 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1162 ret
= dev_alloc_name(ndev
, ndev
->name
);
1166 ieee80211_assign_perm_addr(local
, ndev
, type
);
1167 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1168 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1170 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1171 sdata
= netdev_priv(ndev
);
1172 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1173 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1174 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1176 /* initialise type-independent data */
1177 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1178 sdata
->local
= local
;
1181 sdata
->arp_filter_state
= true;
1184 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1185 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1187 INIT_LIST_HEAD(&sdata
->key_list
);
1189 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1190 struct ieee80211_supported_band
*sband
;
1191 sband
= local
->hw
.wiphy
->bands
[i
];
1192 sdata
->rc_rateidx_mask
[i
] =
1193 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1196 /* setup type-dependent data */
1197 ieee80211_setup_sdata(sdata
, type
);
1200 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1201 if (type
== NL80211_IFTYPE_STATION
)
1202 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1205 ret
= register_netdevice(ndev
);
1209 mutex_lock(&local
->iflist_mtx
);
1210 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1211 mutex_unlock(&local
->iflist_mtx
);
1223 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1227 mutex_lock(&sdata
->local
->iflist_mtx
);
1228 list_del_rcu(&sdata
->list
);
1229 mutex_unlock(&sdata
->local
->iflist_mtx
);
1231 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1232 mesh_path_flush_by_iface(sdata
);
1235 unregister_netdevice(sdata
->dev
);
1239 * Remove all interfaces, may only be called at hardware unregistration
1240 * time because it doesn't do RCU-safe list removals.
1242 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1244 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1245 LIST_HEAD(unreg_list
);
1249 mutex_lock(&local
->iflist_mtx
);
1250 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1251 list_del(&sdata
->list
);
1253 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1254 mesh_path_flush_by_iface(sdata
);
1256 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1258 mutex_unlock(&local
->iflist_mtx
);
1259 unregister_netdevice_many(&unreg_list
);
1260 list_del(&unreg_list
);
1263 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
1266 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
1269 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1270 wiphy_debug(local
->hw
.wiphy
, "device no longer idle - %s\n", reason
);
1273 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
1274 return IEEE80211_CONF_CHANGE_IDLE
;
1277 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
1279 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
1282 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1283 wiphy_debug(local
->hw
.wiphy
, "device now idle\n");
1286 drv_flush(local
, false);
1288 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
1289 return IEEE80211_CONF_CHANGE_IDLE
;
1292 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
1294 struct ieee80211_sub_if_data
*sdata
;
1296 bool working
= false, scanning
= false, hw_roc
= false;
1297 struct ieee80211_work
*wk
;
1298 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
1300 #ifdef CONFIG_PROVE_LOCKING
1301 WARN_ON(debug_locks
&& !lockdep_rtnl_is_held() &&
1302 !lockdep_is_held(&local
->iflist_mtx
));
1304 lockdep_assert_held(&local
->mtx
);
1306 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1307 if (!ieee80211_sdata_running(sdata
)) {
1308 sdata
->vif
.bss_conf
.idle
= true;
1312 sdata
->old_idle
= sdata
->vif
.bss_conf
.idle
;
1314 /* do not count disabled managed interfaces */
1315 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1316 !sdata
->u
.mgd
.associated
) {
1317 sdata
->vif
.bss_conf
.idle
= true;
1320 /* do not count unused IBSS interfaces */
1321 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
1322 !sdata
->u
.ibss
.ssid_len
) {
1323 sdata
->vif
.bss_conf
.idle
= true;
1326 /* count everything else */
1330 list_for_each_entry(wk
, &local
->work_list
, list
) {
1332 wk
->sdata
->vif
.bss_conf
.idle
= false;
1335 if (local
->scan_sdata
) {
1337 local
->scan_sdata
->vif
.bss_conf
.idle
= false;
1340 if (local
->hw_roc_channel
)
1343 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1344 if (sdata
->old_idle
== sdata
->vif
.bss_conf
.idle
)
1346 if (!ieee80211_sdata_running(sdata
))
1348 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_IDLE
);
1351 if (working
|| scanning
|| hw_roc
)
1352 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
1354 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
1357 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
1359 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
1361 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
1364 return ieee80211_idle_off(local
, "hw remain-on-channel");
1366 return ieee80211_idle_off(local
, "working");
1368 return ieee80211_idle_off(local
, "scanning");
1370 return ieee80211_idle_on(local
);
1372 return ieee80211_idle_off(local
, "in use");
1377 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
1381 mutex_lock(&local
->iflist_mtx
);
1382 chg
= __ieee80211_recalc_idle(local
);
1383 mutex_unlock(&local
->iflist_mtx
);
1385 ieee80211_hw_config(local
, chg
);
1388 static int netdev_notify(struct notifier_block
*nb
,
1389 unsigned long state
,
1392 struct net_device
*dev
= ndev
;
1393 struct ieee80211_sub_if_data
*sdata
;
1395 if (state
!= NETDEV_CHANGENAME
)
1398 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1401 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1404 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1406 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1408 ieee80211_debugfs_rename_netdev(sdata
);
1412 static struct notifier_block mac80211_netdev_notifier
= {
1413 .notifier_call
= netdev_notify
,
1416 int ieee80211_iface_init(void)
1418 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1421 void ieee80211_iface_exit(void)
1423 unregister_netdevice_notifier(&mac80211_netdev_notifier
);