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 netif_carrier_off(dev
);
299 netif_carrier_on(dev
);
302 * set default queue parameters so drivers don't
303 * need to initialise the hardware if the hardware
304 * doesn't start up with sane defaults
306 ieee80211_set_wmm_default(sdata
);
309 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
311 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
312 /* Create STA entry for the WDS peer */
313 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
317 goto err_del_interface
;
320 /* no atomic bitop required since STA is not live yet */
321 set_sta_flag(sta
, WLAN_STA_AUTHORIZED
);
323 res
= sta_info_insert(sta
);
325 /* STA has been freed */
326 goto err_del_interface
;
329 rate_control_rate_init(sta
);
333 * set_multicast_list will be invoked by the networking core
334 * which will check whether any increments here were done in
335 * error and sync them down to the hardware as filter flags.
337 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
338 atomic_inc(&local
->iff_allmultis
);
340 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
341 atomic_inc(&local
->iff_promiscs
);
343 mutex_lock(&local
->mtx
);
344 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
345 mutex_unlock(&local
->mtx
);
351 ieee80211_hw_config(local
, hw_reconf_flags
);
353 ieee80211_recalc_ps(local
, -1);
355 netif_tx_start_all_queues(dev
);
359 drv_remove_interface(local
, sdata
);
361 if (!local
->open_count
)
365 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
366 list_del(&sdata
->u
.vlan
.list
);
367 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
371 static int ieee80211_open(struct net_device
*dev
)
373 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
376 /* fail early if user set an invalid address */
377 if (!is_valid_ether_addr(dev
->dev_addr
))
378 return -EADDRNOTAVAIL
;
380 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
384 return ieee80211_do_open(dev
, true);
387 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
390 struct ieee80211_local
*local
= sdata
->local
;
392 struct sk_buff
*skb
, *tmp
;
393 u32 hw_reconf_flags
= 0;
395 enum nl80211_channel_type orig_ct
;
397 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
399 if (local
->scan_sdata
== sdata
)
400 ieee80211_scan_cancel(local
);
403 * Stop TX on this interface first.
405 netif_tx_stop_all_queues(sdata
->dev
);
408 * Purge work for this interface.
410 ieee80211_work_purge(sdata
);
413 * Remove all stations associated with this interface.
415 * This must be done before calling ops->remove_interface()
416 * because otherwise we can later invoke ops->sta_notify()
417 * whenever the STAs are removed, and that invalidates driver
418 * assumptions about always getting a vif pointer that is valid
419 * (because if we remove a STA after ops->remove_interface()
420 * the driver will have removed the vif info already!)
422 * This is relevant only in AP, WDS and mesh modes, since in
423 * all other modes we've already removed all stations when
426 sta_info_flush(local
, sdata
);
429 * Don't count this interface for promisc/allmulti while it
430 * is down. dev_mc_unsync() will invoke set_multicast_list
431 * on the master interface which will sync these down to the
432 * hardware as filter flags.
434 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
435 atomic_dec(&local
->iff_allmultis
);
437 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
438 atomic_dec(&local
->iff_promiscs
);
440 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
442 local
->fif_probe_req
--;
443 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
444 local
->fif_probe_req
--;
447 netif_addr_lock_bh(sdata
->dev
);
448 spin_lock_bh(&local
->filter_lock
);
449 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
450 sdata
->dev
->addr_len
);
451 spin_unlock_bh(&local
->filter_lock
);
452 netif_addr_unlock_bh(sdata
->dev
);
454 ieee80211_configure_filter(local
);
456 del_timer_sync(&local
->dynamic_ps_timer
);
457 cancel_work_sync(&local
->dynamic_ps_enable_work
);
459 /* APs need special treatment */
460 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
461 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
462 struct beacon_data
*old_beacon
=
463 rtnl_dereference(sdata
->u
.ap
.beacon
);
465 /* sdata_running will return false, so this will disable */
466 ieee80211_bss_info_change_notify(sdata
,
467 BSS_CHANGED_BEACON_ENABLED
);
470 RCU_INIT_POINTER(sdata
->u
.ap
.beacon
, NULL
);
474 /* down all dependent devices, that is VLANs */
475 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
477 dev_close(vlan
->dev
);
478 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
480 /* free all potentially still buffered bcast frames */
481 local
->total_ps_buffered
-= skb_queue_len(&sdata
->u
.ap
.ps_bc_buf
);
482 skb_queue_purge(&sdata
->u
.ap
.ps_bc_buf
);
488 switch (sdata
->vif
.type
) {
489 case NL80211_IFTYPE_AP_VLAN
:
490 list_del(&sdata
->u
.vlan
.list
);
491 /* no need to tell driver */
493 case NL80211_IFTYPE_MONITOR
:
494 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
495 local
->cooked_mntrs
--;
500 if (local
->monitors
== 0) {
501 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
502 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
505 ieee80211_adjust_monitor_flags(sdata
, -1);
506 ieee80211_configure_filter(local
);
509 flush_work(&sdata
->work
);
511 * When we get here, the interface is marked down.
512 * Call synchronize_rcu() to wait for the RX path
513 * should it be using the interface and enqueuing
514 * frames at this very time on another CPU.
517 skb_queue_purge(&sdata
->skb_queue
);
520 * Disable beaconing here for mesh only, AP and IBSS
521 * are already taken care of.
523 if (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
)
524 ieee80211_bss_info_change_notify(sdata
,
525 BSS_CHANGED_BEACON_ENABLED
);
528 * Free all remaining keys, there shouldn't be any,
529 * except maybe group keys in AP more or WDS?
531 ieee80211_free_keys(sdata
);
534 drv_remove_interface(local
, sdata
);
539 mutex_lock(&local
->mtx
);
540 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
541 mutex_unlock(&local
->mtx
);
543 ieee80211_recalc_ps(local
, -1);
545 if (local
->open_count
== 0) {
546 if (local
->ops
->napi_poll
)
547 napi_disable(&local
->napi
);
548 ieee80211_clear_tx_pending(local
);
549 ieee80211_stop_device(local
);
551 /* no reconfiguring after stop! */
555 /* Re-calculate channel-type, in case there are multiple vifs
556 * on different channel types.
558 orig_ct
= local
->_oper_channel_type
;
559 ieee80211_set_channel_type(local
, NULL
, NL80211_CHAN_NO_HT
);
561 /* do after stop to avoid reconfiguring when we stop anyway */
562 if (hw_reconf_flags
|| (orig_ct
!= local
->_oper_channel_type
))
563 ieee80211_hw_config(local
, hw_reconf_flags
);
565 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
566 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
567 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
568 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
569 if (info
->control
.vif
== &sdata
->vif
) {
570 __skb_unlink(skb
, &local
->pending
[i
]);
571 dev_kfree_skb_irq(skb
);
575 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
578 static int ieee80211_stop(struct net_device
*dev
)
580 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
582 ieee80211_do_stop(sdata
, true);
587 static void ieee80211_set_multicast_list(struct net_device
*dev
)
589 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
590 struct ieee80211_local
*local
= sdata
->local
;
591 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
593 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
594 promisc
= !!(dev
->flags
& IFF_PROMISC
);
595 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
596 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
598 if (allmulti
!= sdata_allmulti
) {
599 if (dev
->flags
& IFF_ALLMULTI
)
600 atomic_inc(&local
->iff_allmultis
);
602 atomic_dec(&local
->iff_allmultis
);
603 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
606 if (promisc
!= sdata_promisc
) {
607 if (dev
->flags
& IFF_PROMISC
)
608 atomic_inc(&local
->iff_promiscs
);
610 atomic_dec(&local
->iff_promiscs
);
611 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
613 spin_lock_bh(&local
->filter_lock
);
614 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
615 spin_unlock_bh(&local
->filter_lock
);
616 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
620 * Called when the netdev is removed or, by the code below, before
621 * the interface type changes.
623 static void ieee80211_teardown_sdata(struct net_device
*dev
)
625 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
626 struct ieee80211_local
*local
= sdata
->local
;
630 /* free extra data */
631 ieee80211_free_keys(sdata
);
633 ieee80211_debugfs_remove_netdev(sdata
);
635 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
636 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
637 sdata
->fragment_next
= 0;
639 if (ieee80211_vif_is_mesh(&sdata
->vif
))
640 mesh_rmc_free(sdata
);
642 flushed
= sta_info_flush(local
, sdata
);
646 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
649 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
652 static const struct net_device_ops ieee80211_dataif_ops
= {
653 .ndo_open
= ieee80211_open
,
654 .ndo_stop
= ieee80211_stop
,
655 .ndo_uninit
= ieee80211_teardown_sdata
,
656 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
657 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
658 .ndo_change_mtu
= ieee80211_change_mtu
,
659 .ndo_set_mac_address
= ieee80211_change_mac
,
660 .ndo_select_queue
= ieee80211_netdev_select_queue
,
663 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
666 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
667 struct ieee80211_local
*local
= sdata
->local
;
668 struct ieee80211_hdr
*hdr
;
669 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
672 if (local
->hw
.queues
< 4)
676 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
677 return 0; /* doesn't matter, frame will be dropped */
679 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
681 if (!ieee80211_is_data(hdr
->frame_control
)) {
683 return ieee802_1d_to_ac
[skb
->priority
];
685 if (!ieee80211_is_data_qos(hdr
->frame_control
)) {
687 return ieee802_1d_to_ac
[skb
->priority
];
690 p
= ieee80211_get_qos_ctl(hdr
);
691 skb
->priority
= *p
& IEEE80211_QOS_CTL_TAG1D_MASK
;
693 return ieee80211_downgrade_queue(local
, skb
);
696 static const struct net_device_ops ieee80211_monitorif_ops
= {
697 .ndo_open
= ieee80211_open
,
698 .ndo_stop
= ieee80211_stop
,
699 .ndo_uninit
= ieee80211_teardown_sdata
,
700 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
701 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
702 .ndo_change_mtu
= ieee80211_change_mtu
,
703 .ndo_set_mac_address
= eth_mac_addr
,
704 .ndo_select_queue
= ieee80211_monitor_select_queue
,
707 static void ieee80211_if_setup(struct net_device
*dev
)
710 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
711 dev
->netdev_ops
= &ieee80211_dataif_ops
;
712 dev
->destructor
= free_netdev
;
715 static void ieee80211_iface_work(struct work_struct
*work
)
717 struct ieee80211_sub_if_data
*sdata
=
718 container_of(work
, struct ieee80211_sub_if_data
, work
);
719 struct ieee80211_local
*local
= sdata
->local
;
721 struct sta_info
*sta
;
722 struct ieee80211_ra_tid
*ra_tid
;
724 if (!ieee80211_sdata_running(sdata
))
731 * ieee80211_queue_work() should have picked up most cases,
732 * here we'll pick the rest.
734 if (WARN(local
->suspended
,
735 "interface work scheduled while going to suspend\n"))
738 /* first process frames */
739 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
740 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
742 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
743 ra_tid
= (void *)&skb
->cb
;
744 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
746 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
747 ra_tid
= (void *)&skb
->cb
;
748 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
750 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
751 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
754 mutex_lock(&local
->sta_mtx
);
755 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
757 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
758 case WLAN_ACTION_ADDBA_REQ
:
759 ieee80211_process_addba_request(
760 local
, sta
, mgmt
, len
);
762 case WLAN_ACTION_ADDBA_RESP
:
763 ieee80211_process_addba_resp(local
, sta
,
766 case WLAN_ACTION_DELBA
:
767 ieee80211_process_delba(sdata
, sta
,
775 mutex_unlock(&local
->sta_mtx
);
776 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
777 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
779 * So the frame isn't mgmt, but frame_control
780 * is at the right place anyway, of course, so
781 * the if statement is correct.
783 * Warn if we have other data frame types here,
784 * they must not get here.
786 WARN_ON(hdr
->frame_control
&
787 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
788 WARN_ON(!(hdr
->seq_ctrl
&
789 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
791 * This was a fragment of a frame, received while
792 * a block-ack session was active. That cannot be
793 * right, so terminate the session.
795 mutex_lock(&local
->sta_mtx
);
796 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
798 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
799 IEEE80211_QOS_CTL_TID_MASK
;
801 __ieee80211_stop_rx_ba_session(
802 sta
, tid
, WLAN_BACK_RECIPIENT
,
803 WLAN_REASON_QSTA_REQUIRE_SETUP
,
806 mutex_unlock(&local
->sta_mtx
);
807 } else switch (sdata
->vif
.type
) {
808 case NL80211_IFTYPE_STATION
:
809 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
811 case NL80211_IFTYPE_ADHOC
:
812 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
814 case NL80211_IFTYPE_MESH_POINT
:
815 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
817 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
820 WARN(1, "frame for unexpected interface type");
827 /* then other type-dependent work */
828 switch (sdata
->vif
.type
) {
829 case NL80211_IFTYPE_STATION
:
830 ieee80211_sta_work(sdata
);
832 case NL80211_IFTYPE_ADHOC
:
833 ieee80211_ibss_work(sdata
);
835 case NL80211_IFTYPE_MESH_POINT
:
836 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
838 ieee80211_mesh_work(sdata
);
847 * Helper function to initialise an interface to a specific type.
849 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
850 enum nl80211_iftype type
)
852 /* clear type-dependent union */
853 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
855 /* and set some type-dependent values */
856 sdata
->vif
.type
= type
;
857 sdata
->vif
.p2p
= false;
858 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
859 sdata
->wdev
.iftype
= type
;
861 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
862 sdata
->control_port_no_encrypt
= false;
864 /* only monitor differs */
865 sdata
->dev
->type
= ARPHRD_ETHER
;
867 skb_queue_head_init(&sdata
->skb_queue
);
868 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
871 case NL80211_IFTYPE_P2P_GO
:
872 type
= NL80211_IFTYPE_AP
;
873 sdata
->vif
.type
= type
;
874 sdata
->vif
.p2p
= true;
876 case NL80211_IFTYPE_AP
:
877 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
878 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
880 case NL80211_IFTYPE_P2P_CLIENT
:
881 type
= NL80211_IFTYPE_STATION
;
882 sdata
->vif
.type
= type
;
883 sdata
->vif
.p2p
= true;
885 case NL80211_IFTYPE_STATION
:
886 ieee80211_sta_setup_sdata(sdata
);
888 case NL80211_IFTYPE_ADHOC
:
889 ieee80211_ibss_setup_sdata(sdata
);
891 case NL80211_IFTYPE_MESH_POINT
:
892 if (ieee80211_vif_is_mesh(&sdata
->vif
))
893 ieee80211_mesh_init_sdata(sdata
);
895 case NL80211_IFTYPE_MONITOR
:
896 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
897 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
898 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
899 MONITOR_FLAG_OTHER_BSS
;
901 case NL80211_IFTYPE_WDS
:
902 case NL80211_IFTYPE_AP_VLAN
:
904 case NL80211_IFTYPE_UNSPECIFIED
:
905 case NUM_NL80211_IFTYPES
:
910 ieee80211_debugfs_add_netdev(sdata
);
913 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
914 enum nl80211_iftype type
)
916 struct ieee80211_local
*local
= sdata
->local
;
918 enum nl80211_iftype internal_type
= type
;
923 if (!local
->ops
->change_interface
)
926 switch (sdata
->vif
.type
) {
927 case NL80211_IFTYPE_AP
:
928 case NL80211_IFTYPE_STATION
:
929 case NL80211_IFTYPE_ADHOC
:
931 * Could maybe also all others here?
932 * Just not sure how that interacts
933 * with the RX/config path e.g. for
942 case NL80211_IFTYPE_AP
:
943 case NL80211_IFTYPE_STATION
:
944 case NL80211_IFTYPE_ADHOC
:
946 * Could probably support everything
947 * but WDS here (WDS do_open can fail
948 * under memory pressure, which this
949 * code isn't prepared to handle).
952 case NL80211_IFTYPE_P2P_CLIENT
:
954 internal_type
= NL80211_IFTYPE_STATION
;
956 case NL80211_IFTYPE_P2P_GO
:
958 internal_type
= NL80211_IFTYPE_AP
;
964 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
968 ieee80211_do_stop(sdata
, false);
970 ieee80211_teardown_sdata(sdata
->dev
);
972 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
974 type
= sdata
->vif
.type
;
976 ieee80211_setup_sdata(sdata
, type
);
978 err
= ieee80211_do_open(sdata
->dev
, false);
979 WARN(err
, "type change: do_open returned %d", err
);
984 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
985 enum nl80211_iftype type
)
991 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
994 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
995 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
996 type
== NL80211_IFTYPE_ADHOC
)
999 if (ieee80211_sdata_running(sdata
)) {
1000 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1004 /* Purge and reset type-dependent state. */
1005 ieee80211_teardown_sdata(sdata
->dev
);
1006 ieee80211_setup_sdata(sdata
, type
);
1009 /* reset some values that shouldn't be kept across type changes */
1010 sdata
->vif
.bss_conf
.basic_rates
=
1011 ieee80211_mandatory_rates(sdata
->local
,
1012 sdata
->local
->hw
.conf
.channel
->band
);
1013 sdata
->drop_unencrypted
= 0;
1014 if (type
== NL80211_IFTYPE_STATION
)
1015 sdata
->u
.mgd
.use_4addr
= false;
1020 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1021 struct net_device
*dev
,
1022 enum nl80211_iftype type
)
1024 struct ieee80211_sub_if_data
*sdata
;
1025 u64 mask
, start
, addr
, val
, inc
;
1027 u8 tmp_addr
[ETH_ALEN
];
1030 /* default ... something at least */
1031 memcpy(dev
->perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1033 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1034 local
->hw
.wiphy
->n_addresses
<= 1)
1038 mutex_lock(&local
->iflist_mtx
);
1041 case NL80211_IFTYPE_MONITOR
:
1042 /* doesn't matter */
1044 case NL80211_IFTYPE_WDS
:
1045 case NL80211_IFTYPE_AP_VLAN
:
1046 /* match up with an AP interface */
1047 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1048 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1050 memcpy(dev
->perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1053 /* keep default if no AP interface present */
1056 /* assign a new address if possible -- try n_addresses first */
1057 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1060 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1061 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1062 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1069 memcpy(dev
->perm_addr
,
1070 local
->hw
.wiphy
->addresses
[i
].addr
,
1076 /* try mask if available */
1077 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1080 m
= local
->hw
.wiphy
->addr_mask
;
1081 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1082 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1083 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1085 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1086 /* not a contiguous mask ... not handled now! */
1087 printk(KERN_DEBUG
"not contiguous\n");
1091 m
= local
->hw
.wiphy
->perm_addr
;
1092 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1093 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1094 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1096 inc
= 1ULL<<__ffs64(mask
);
1097 val
= (start
& mask
);
1098 addr
= (start
& ~mask
) | (val
& mask
);
1102 tmp_addr
[5] = addr
>> 0*8;
1103 tmp_addr
[4] = addr
>> 1*8;
1104 tmp_addr
[3] = addr
>> 2*8;
1105 tmp_addr
[2] = addr
>> 3*8;
1106 tmp_addr
[1] = addr
>> 4*8;
1107 tmp_addr
[0] = addr
>> 5*8;
1111 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1112 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1120 memcpy(dev
->perm_addr
, tmp_addr
, ETH_ALEN
);
1123 addr
= (start
& ~mask
) | (val
& mask
);
1124 } while (addr
!= start
);
1129 mutex_unlock(&local
->iflist_mtx
);
1132 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1133 struct net_device
**new_dev
, enum nl80211_iftype type
,
1134 struct vif_params
*params
)
1136 struct net_device
*ndev
;
1137 struct ieee80211_sub_if_data
*sdata
= NULL
;
1142 ndev
= alloc_netdev_mqs(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1143 name
, ieee80211_if_setup
, local
->hw
.queues
, 1);
1146 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1148 ndev
->needed_headroom
= local
->tx_headroom
+
1149 4*6 /* four MAC addresses */
1150 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1152 + 8 /* rfc1042/bridge tunnel */
1153 - ETH_HLEN
/* ethernet hard_header_len */
1154 + IEEE80211_ENCRYPT_HEADROOM
;
1155 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1157 ret
= dev_alloc_name(ndev
, ndev
->name
);
1161 ieee80211_assign_perm_addr(local
, ndev
, type
);
1162 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1163 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1165 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1166 sdata
= netdev_priv(ndev
);
1167 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1168 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1169 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1171 /* initialise type-independent data */
1172 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1173 sdata
->local
= local
;
1176 sdata
->arp_filter_state
= true;
1179 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1180 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1182 INIT_LIST_HEAD(&sdata
->key_list
);
1184 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1185 struct ieee80211_supported_band
*sband
;
1186 sband
= local
->hw
.wiphy
->bands
[i
];
1187 sdata
->rc_rateidx_mask
[i
] =
1188 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1191 /* setup type-dependent data */
1192 ieee80211_setup_sdata(sdata
, type
);
1195 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1196 if (type
== NL80211_IFTYPE_STATION
)
1197 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1200 ret
= register_netdevice(ndev
);
1204 mutex_lock(&local
->iflist_mtx
);
1205 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1206 mutex_unlock(&local
->iflist_mtx
);
1218 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1222 mutex_lock(&sdata
->local
->iflist_mtx
);
1223 list_del_rcu(&sdata
->list
);
1224 mutex_unlock(&sdata
->local
->iflist_mtx
);
1226 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1227 mesh_path_flush_by_iface(sdata
);
1230 unregister_netdevice(sdata
->dev
);
1234 * Remove all interfaces, may only be called at hardware unregistration
1235 * time because it doesn't do RCU-safe list removals.
1237 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1239 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1240 LIST_HEAD(unreg_list
);
1244 mutex_lock(&local
->iflist_mtx
);
1245 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1246 list_del(&sdata
->list
);
1248 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1249 mesh_path_flush_by_iface(sdata
);
1251 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1253 mutex_unlock(&local
->iflist_mtx
);
1254 unregister_netdevice_many(&unreg_list
);
1255 list_del(&unreg_list
);
1258 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
1261 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
1264 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1265 wiphy_debug(local
->hw
.wiphy
, "device no longer idle - %s\n", reason
);
1268 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
1269 return IEEE80211_CONF_CHANGE_IDLE
;
1272 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
1274 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
1277 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1278 wiphy_debug(local
->hw
.wiphy
, "device now idle\n");
1281 drv_flush(local
, false);
1283 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
1284 return IEEE80211_CONF_CHANGE_IDLE
;
1287 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
1289 struct ieee80211_sub_if_data
*sdata
;
1291 bool working
= false, scanning
= false, hw_roc
= false;
1292 struct ieee80211_work
*wk
;
1293 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
1295 #ifdef CONFIG_PROVE_LOCKING
1296 WARN_ON(debug_locks
&& !lockdep_rtnl_is_held() &&
1297 !lockdep_is_held(&local
->iflist_mtx
));
1299 lockdep_assert_held(&local
->mtx
);
1301 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1302 if (!ieee80211_sdata_running(sdata
)) {
1303 sdata
->vif
.bss_conf
.idle
= true;
1307 sdata
->old_idle
= sdata
->vif
.bss_conf
.idle
;
1309 /* do not count disabled managed interfaces */
1310 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
1311 !sdata
->u
.mgd
.associated
) {
1312 sdata
->vif
.bss_conf
.idle
= true;
1315 /* do not count unused IBSS interfaces */
1316 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
1317 !sdata
->u
.ibss
.ssid_len
) {
1318 sdata
->vif
.bss_conf
.idle
= true;
1321 /* count everything else */
1325 list_for_each_entry(wk
, &local
->work_list
, list
) {
1327 wk
->sdata
->vif
.bss_conf
.idle
= false;
1330 if (local
->scan_sdata
) {
1332 local
->scan_sdata
->vif
.bss_conf
.idle
= false;
1335 if (local
->hw_roc_channel
)
1338 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1339 if (sdata
->old_idle
== sdata
->vif
.bss_conf
.idle
)
1341 if (!ieee80211_sdata_running(sdata
))
1343 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_IDLE
);
1346 if (working
|| scanning
|| hw_roc
)
1347 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
1349 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
1352 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
1354 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
1356 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
1359 return ieee80211_idle_off(local
, "hw remain-on-channel");
1361 return ieee80211_idle_off(local
, "working");
1363 return ieee80211_idle_off(local
, "scanning");
1365 return ieee80211_idle_on(local
);
1367 return ieee80211_idle_off(local
, "in use");
1372 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
1376 mutex_lock(&local
->iflist_mtx
);
1377 chg
= __ieee80211_recalc_idle(local
);
1378 mutex_unlock(&local
->iflist_mtx
);
1380 ieee80211_hw_config(local
, chg
);
1383 static int netdev_notify(struct notifier_block
*nb
,
1384 unsigned long state
,
1387 struct net_device
*dev
= ndev
;
1388 struct ieee80211_sub_if_data
*sdata
;
1390 if (state
!= NETDEV_CHANGENAME
)
1393 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1396 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1399 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1401 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1403 ieee80211_debugfs_rename_netdev(sdata
);
1407 static struct notifier_block mac80211_netdev_notifier
= {
1408 .notifier_call
= netdev_notify
,
1411 int ieee80211_iface_init(void)
1413 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1416 void ieee80211_iface_exit(void)
1418 unregister_netdevice_notifier(&mac80211_netdev_notifier
);