2 * Interface handling (except master interface)
4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 #include <linux/kernel.h>
14 #include <linux/if_arp.h>
15 #include <linux/netdevice.h>
16 #include <linux/rtnetlink.h>
17 #include <net/mac80211.h>
18 #include "ieee80211_i.h"
20 #include "debugfs_netdev.h"
23 #include "driver-ops.h"
26 * DOC: Interface list locking
28 * The interface list in each struct ieee80211_local is protected
31 * (1) modifications may only be done under the RTNL
32 * (2) modifications and readers are protected against each other by
34 * (3) modifications are done in an RCU manner so atomic readers
35 * can traverse the list in RCU-safe blocks.
37 * As a consequence, reads (traversals) of the list can be protected
38 * by either the RTNL, the iflist_mtx or RCU.
42 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
45 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
47 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
49 /* FIX: what would be proper limits for MTU?
50 * This interface uses 802.3 frames. */
52 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
56 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
57 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
58 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
63 static inline int identical_mac_addr_allowed(int type1, int type2)
65 return type1 == NL80211_IFTYPE_MONITOR ||
66 type2 == NL80211_IFTYPE_MONITOR ||
67 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
68 (type1 == NL80211_IFTYPE_WDS &&
69 (type2 == NL80211_IFTYPE_WDS ||
70 type2 == NL80211_IFTYPE_AP)) ||
71 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
72 (type1 == NL80211_IFTYPE_AP_VLAN &&
73 (type2 == NL80211_IFTYPE_AP ||
74 type2 == NL80211_IFTYPE_AP_VLAN));
77 static int ieee80211_open(struct net_device *dev)
79 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
80 struct ieee80211_sub_if_data *nsdata;
81 struct ieee80211_local *local = sdata->local;
83 struct ieee80211_if_init_conf conf;
86 u32 hw_reconf_flags = 0;
87 u8 null_addr[ETH_ALEN] = {0};
89 /* fail early if user set an invalid address */
90 if (compare_ether_addr(dev->dev_addr, null_addr) &&
91 !is_valid_ether_addr(dev->dev_addr))
92 return -EADDRNOTAVAIL;
94 /* we hold the RTNL here so can safely walk the list */
95 list_for_each_entry(nsdata, &local->interfaces, list) {
96 struct net_device *ndev = nsdata->dev;
98 if (ndev != dev && netif_running(ndev)) {
100 * Allow only a single IBSS interface to be up at any
101 * time. This is restricted because beacon distribution
102 * cannot work properly if both are in the same IBSS.
104 * To remove this restriction we'd have to disallow them
105 * from setting the same SSID on different IBSS interfaces
106 * belonging to the same hardware. Then, however, we're
107 * faced with having to adopt two different TSF timers...
109 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
110 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
114 * The remaining checks are only performed for interfaces
115 * with the same MAC address.
117 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
121 * check whether it may have the same address
123 if (!identical_mac_addr_allowed(sdata->vif.type,
128 * can only add VLANs to enabled APs
130 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
131 nsdata->vif.type == NL80211_IFTYPE_AP)
132 sdata->bss = &nsdata->u.ap;
136 switch (sdata->vif.type) {
137 case NL80211_IFTYPE_WDS:
138 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
141 case NL80211_IFTYPE_AP_VLAN:
144 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
146 case NL80211_IFTYPE_AP:
147 sdata->bss = &sdata->u.ap;
149 case NL80211_IFTYPE_MESH_POINT:
150 if (!ieee80211_vif_is_mesh(&sdata->vif))
152 /* mesh ifaces must set allmulti to forward mcast traffic */
153 atomic_inc(&local->iff_allmultis);
155 case NL80211_IFTYPE_STATION:
156 case NL80211_IFTYPE_MONITOR:
157 case NL80211_IFTYPE_ADHOC:
158 /* no special treatment */
160 case NL80211_IFTYPE_UNSPECIFIED:
161 case __NL80211_IFTYPE_AFTER_LAST:
167 if (local->open_count == 0) {
168 res = drv_start(local);
171 /* we're brought up, everything changes */
172 hw_reconf_flags = ~0;
173 ieee80211_led_radio(local, true);
177 * Check all interfaces and copy the hopefully now-present
178 * MAC address to those that have the special null one.
180 list_for_each_entry(nsdata, &local->interfaces, list) {
181 struct net_device *ndev = nsdata->dev;
184 * No need to check netif_running since we do not allow
185 * it to start up with this invalid address.
187 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) {
188 memcpy(ndev->dev_addr,
189 local->hw.wiphy->perm_addr,
191 memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN);
196 * Validate the MAC address for this device.
198 if (!is_valid_ether_addr(dev->dev_addr)) {
199 if (!local->open_count)
201 return -EADDRNOTAVAIL;
204 switch (sdata->vif.type) {
205 case NL80211_IFTYPE_AP_VLAN:
206 /* no need to tell driver */
208 case NL80211_IFTYPE_MONITOR:
209 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
210 local->cooked_mntrs++;
214 /* must be before the call to ieee80211_configure_filter */
216 if (local->monitors == 1) {
217 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
218 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
221 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
222 local->fif_fcsfail++;
223 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
224 local->fif_plcpfail++;
225 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
226 local->fif_control++;
229 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
230 local->fif_other_bss++;
232 ieee80211_configure_filter(local);
235 conf.vif = &sdata->vif;
236 conf.type = sdata->vif.type;
237 conf.mac_addr = dev->dev_addr;
238 res = drv_add_interface(local, &conf);
242 if (ieee80211_vif_is_mesh(&sdata->vif)) {
243 local->fif_other_bss++;
244 ieee80211_configure_filter(local);
246 ieee80211_start_mesh(sdata);
247 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
250 ieee80211_configure_filter(local);
253 changed |= ieee80211_reset_erp_info(sdata);
254 ieee80211_bss_info_change_notify(sdata, changed);
255 ieee80211_enable_keys(sdata);
257 if (sdata->vif.type == NL80211_IFTYPE_STATION)
258 netif_carrier_off(dev);
260 netif_carrier_on(dev);
263 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
264 /* Create STA entry for the WDS peer */
265 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
269 goto err_del_interface;
272 /* no locking required since STA is not live yet */
273 sta->flags |= WLAN_STA_AUTHORIZED;
275 res = sta_info_insert(sta);
277 /* STA has been freed */
278 goto err_del_interface;
283 * set_multicast_list will be invoked by the networking core
284 * which will check whether any increments here were done in
285 * error and sync them down to the hardware as filter flags.
287 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
288 atomic_inc(&local->iff_allmultis);
290 if (sdata->flags & IEEE80211_SDATA_PROMISC)
291 atomic_inc(&local->iff_promiscs);
293 hw_reconf_flags |= __ieee80211_recalc_idle(local);
296 if (hw_reconf_flags) {
297 ieee80211_hw_config(local, hw_reconf_flags);
299 * set default queue parameters so drivers don't
300 * need to initialise the hardware if the hardware
301 * doesn't start up with sane defaults
303 ieee80211_set_wmm_default(sdata);
306 ieee80211_recalc_ps(local, -1);
309 * ieee80211_sta_work is disabled while network interface
310 * is down. Therefore, some configuration changes may not
311 * yet be effective. Trigger execution of ieee80211_sta_work
314 if (sdata->vif.type == NL80211_IFTYPE_STATION)
315 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
317 netif_start_queue(dev);
321 drv_remove_interface(local, &conf);
323 if (!local->open_count)
327 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
328 list_del(&sdata->u.vlan.list);
332 static int ieee80211_stop(struct net_device *dev)
334 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
335 struct ieee80211_local *local = sdata->local;
336 struct ieee80211_if_init_conf conf;
337 struct sta_info *sta;
339 struct sk_buff *skb, *tmp;
340 u32 hw_reconf_flags = 0;
344 * Stop TX on this interface first.
346 netif_stop_queue(dev);
349 * Now delete all active aggregation sessions.
353 list_for_each_entry_rcu(sta, &local->sta_list, list) {
354 if (sta->sdata == sdata)
355 ieee80211_sta_tear_down_BA_sessions(sta);
361 * Remove all stations associated with this interface.
363 * This must be done before calling ops->remove_interface()
364 * because otherwise we can later invoke ops->sta_notify()
365 * whenever the STAs are removed, and that invalidates driver
366 * assumptions about always getting a vif pointer that is valid
367 * (because if we remove a STA after ops->remove_interface()
368 * the driver will have removed the vif info already!)
370 * We could relax this and only unlink the stations from the
371 * hash table and list but keep them on a per-sdata list that
372 * will be inserted back again when the interface is brought
373 * up again, but I don't currently see a use case for that,
374 * except with WDS which gets a STA entry created when it is
377 sta_info_flush(local, sdata);
380 * Don't count this interface for promisc/allmulti while it
381 * is down. dev_mc_unsync() will invoke set_multicast_list
382 * on the master interface which will sync these down to the
383 * hardware as filter flags.
385 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
386 atomic_dec(&local->iff_allmultis);
388 if (sdata->flags & IEEE80211_SDATA_PROMISC)
389 atomic_dec(&local->iff_promiscs);
391 if (sdata->vif.type == NL80211_IFTYPE_AP)
394 netif_addr_lock_bh(dev);
395 spin_lock_bh(&local->filter_lock);
396 __dev_addr_unsync(&local->mc_list, &local->mc_count,
397 &dev->mc_list, &dev->mc_count);
398 spin_unlock_bh(&local->filter_lock);
399 netif_addr_unlock_bh(dev);
401 ieee80211_configure_filter(local);
403 del_timer_sync(&local->dynamic_ps_timer);
404 cancel_work_sync(&local->dynamic_ps_enable_work);
406 /* APs need special treatment */
407 if (sdata->vif.type == NL80211_IFTYPE_AP) {
408 struct ieee80211_sub_if_data *vlan, *tmpsdata;
409 struct beacon_data *old_beacon = sdata->u.ap.beacon;
412 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
416 /* down all dependent devices, that is VLANs */
417 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
419 dev_close(vlan->dev);
420 WARN_ON(!list_empty(&sdata->u.ap.vlans));
425 switch (sdata->vif.type) {
426 case NL80211_IFTYPE_AP_VLAN:
427 list_del(&sdata->u.vlan.list);
428 /* no need to tell driver */
430 case NL80211_IFTYPE_MONITOR:
431 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
432 local->cooked_mntrs--;
437 if (local->monitors == 0) {
438 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
439 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
442 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
443 local->fif_fcsfail--;
444 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
445 local->fif_plcpfail--;
446 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
448 local->fif_control--;
450 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
451 local->fif_other_bss--;
453 ieee80211_configure_filter(local);
455 case NL80211_IFTYPE_STATION:
456 del_timer_sync(&sdata->u.mgd.chswitch_timer);
457 del_timer_sync(&sdata->u.mgd.timer);
458 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
459 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
461 * If any of the timers fired while we waited for it, it will
462 * have queued its work. Now the work will be running again
463 * but will not rearm the timer again because it checks
464 * whether the interface is running, which, at this point,
467 cancel_work_sync(&sdata->u.mgd.work);
468 cancel_work_sync(&sdata->u.mgd.chswitch_work);
469 cancel_work_sync(&sdata->u.mgd.monitor_work);
470 cancel_work_sync(&sdata->u.mgd.beacon_loss_work);
473 * When we get here, the interface is marked down.
474 * Call synchronize_rcu() to wait for the RX path
475 * should it be using the interface and enqueuing
476 * frames at this very time on another CPU.
479 skb_queue_purge(&sdata->u.mgd.skb_queue);
481 case NL80211_IFTYPE_ADHOC:
482 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
483 del_timer_sync(&sdata->u.ibss.timer);
484 cancel_work_sync(&sdata->u.ibss.work);
486 skb_queue_purge(&sdata->u.ibss.skb_queue);
489 case NL80211_IFTYPE_MESH_POINT:
490 if (ieee80211_vif_is_mesh(&sdata->vif)) {
491 /* other_bss and allmulti are always set on mesh
493 local->fif_other_bss--;
494 atomic_dec(&local->iff_allmultis);
496 ieee80211_configure_filter(local);
498 ieee80211_stop_mesh(sdata);
502 if (local->scan_sdata == sdata)
503 ieee80211_scan_cancel(local);
506 * Disable beaconing for AP and mesh, IBSS can't
507 * still be joined to a network at this point.
509 if (sdata->vif.type == NL80211_IFTYPE_AP ||
510 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
511 ieee80211_bss_info_change_notify(sdata,
512 BSS_CHANGED_BEACON_ENABLED);
515 conf.vif = &sdata->vif;
516 conf.type = sdata->vif.type;
517 conf.mac_addr = dev->dev_addr;
518 /* disable all keys for as long as this netdev is down */
519 ieee80211_disable_keys(sdata);
520 drv_remove_interface(local, &conf);
525 hw_reconf_flags |= __ieee80211_recalc_idle(local);
527 ieee80211_recalc_ps(local, -1);
529 if (local->open_count == 0) {
530 ieee80211_clear_tx_pending(local);
531 ieee80211_stop_device(local);
533 /* no reconfiguring after stop! */
537 /* do after stop to avoid reconfiguring when we stop anyway */
539 ieee80211_hw_config(local, hw_reconf_flags);
541 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
542 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
543 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
544 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
545 if (info->control.vif == &sdata->vif) {
546 __skb_unlink(skb, &local->pending[i]);
547 dev_kfree_skb_irq(skb);
551 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
556 static void ieee80211_set_multicast_list(struct net_device *dev)
558 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
559 struct ieee80211_local *local = sdata->local;
560 int allmulti, promisc, sdata_allmulti, sdata_promisc;
562 allmulti = !!(dev->flags & IFF_ALLMULTI);
563 promisc = !!(dev->flags & IFF_PROMISC);
564 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
565 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
567 if (allmulti != sdata_allmulti) {
568 if (dev->flags & IFF_ALLMULTI)
569 atomic_inc(&local->iff_allmultis);
571 atomic_dec(&local->iff_allmultis);
572 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
575 if (promisc != sdata_promisc) {
576 if (dev->flags & IFF_PROMISC)
577 atomic_inc(&local->iff_promiscs);
579 atomic_dec(&local->iff_promiscs);
580 sdata->flags ^= IEEE80211_SDATA_PROMISC;
582 spin_lock_bh(&local->filter_lock);
583 __dev_addr_sync(&local->mc_list, &local->mc_count,
584 &dev->mc_list, &dev->mc_count);
585 spin_unlock_bh(&local->filter_lock);
586 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
590 * Called when the netdev is removed or, by the code below, before
591 * the interface type changes.
593 static void ieee80211_teardown_sdata(struct net_device *dev)
595 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
596 struct ieee80211_local *local = sdata->local;
597 struct beacon_data *beacon;
602 /* free extra data */
603 ieee80211_free_keys(sdata);
605 ieee80211_debugfs_remove_netdev(sdata);
607 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
608 __skb_queue_purge(&sdata->fragments[i].skb_list);
609 sdata->fragment_next = 0;
611 switch (sdata->vif.type) {
612 case NL80211_IFTYPE_AP:
613 beacon = sdata->u.ap.beacon;
614 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
618 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
619 local->total_ps_buffered--;
624 case NL80211_IFTYPE_MESH_POINT:
625 if (ieee80211_vif_is_mesh(&sdata->vif))
626 mesh_rmc_free(sdata);
628 case NL80211_IFTYPE_ADHOC:
629 if (WARN_ON(sdata->u.ibss.presp))
630 kfree_skb(sdata->u.ibss.presp);
632 case NL80211_IFTYPE_STATION:
633 case NL80211_IFTYPE_WDS:
634 case NL80211_IFTYPE_AP_VLAN:
635 case NL80211_IFTYPE_MONITOR:
637 case NL80211_IFTYPE_UNSPECIFIED:
638 case __NL80211_IFTYPE_AFTER_LAST:
643 flushed = sta_info_flush(local, sdata);
647 static const struct net_device_ops ieee80211_dataif_ops = {
648 .ndo_open = ieee80211_open,
649 .ndo_stop = ieee80211_stop,
650 .ndo_uninit = ieee80211_teardown_sdata,
651 .ndo_start_xmit = ieee80211_subif_start_xmit,
652 .ndo_set_multicast_list = ieee80211_set_multicast_list,
653 .ndo_change_mtu = ieee80211_change_mtu,
654 .ndo_set_mac_address = eth_mac_addr,
657 static const struct net_device_ops ieee80211_monitorif_ops = {
658 .ndo_open = ieee80211_open,
659 .ndo_stop = ieee80211_stop,
660 .ndo_uninit = ieee80211_teardown_sdata,
661 .ndo_start_xmit = ieee80211_monitor_start_xmit,
662 .ndo_set_multicast_list = ieee80211_set_multicast_list,
663 .ndo_change_mtu = ieee80211_change_mtu,
664 .ndo_set_mac_address = eth_mac_addr,
667 static void ieee80211_if_setup(struct net_device *dev)
670 dev->netdev_ops = &ieee80211_dataif_ops;
671 dev->destructor = free_netdev;
675 * Helper function to initialise an interface to a specific type.
677 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
678 enum nl80211_iftype type)
680 /* clear type-dependent union */
681 memset(&sdata->u, 0, sizeof(sdata->u));
683 /* and set some type-dependent values */
684 sdata->vif.type = type;
685 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
686 sdata->wdev.iftype = type;
688 /* only monitor differs */
689 sdata->dev->type = ARPHRD_ETHER;
692 case NL80211_IFTYPE_AP:
693 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
694 INIT_LIST_HEAD(&sdata->u.ap.vlans);
696 case NL80211_IFTYPE_STATION:
697 ieee80211_sta_setup_sdata(sdata);
699 case NL80211_IFTYPE_ADHOC:
700 ieee80211_ibss_setup_sdata(sdata);
702 case NL80211_IFTYPE_MESH_POINT:
703 if (ieee80211_vif_is_mesh(&sdata->vif))
704 ieee80211_mesh_init_sdata(sdata);
706 case NL80211_IFTYPE_MONITOR:
707 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
708 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
709 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
710 MONITOR_FLAG_OTHER_BSS;
712 case NL80211_IFTYPE_WDS:
713 case NL80211_IFTYPE_AP_VLAN:
715 case NL80211_IFTYPE_UNSPECIFIED:
716 case __NL80211_IFTYPE_AFTER_LAST:
721 ieee80211_debugfs_add_netdev(sdata);
724 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
725 enum nl80211_iftype type)
729 if (type == sdata->vif.type)
732 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
733 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
734 type == NL80211_IFTYPE_ADHOC)
738 * We could, here, on changes between IBSS/STA/MESH modes,
739 * invoke an MLME function instead that disassociates etc.
740 * and goes into the requested mode.
743 if (netif_running(sdata->dev))
746 /* Purge and reset type-dependent state. */
747 ieee80211_teardown_sdata(sdata->dev);
748 ieee80211_setup_sdata(sdata, type);
750 /* reset some values that shouldn't be kept across type changes */
751 sdata->vif.bss_conf.basic_rates =
752 ieee80211_mandatory_rates(sdata->local,
753 sdata->local->hw.conf.channel->band);
754 sdata->drop_unencrypted = 0;
755 if (type == NL80211_IFTYPE_STATION)
756 sdata->u.mgd.use_4addr = false;
761 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
762 struct net_device **new_dev, enum nl80211_iftype type,
763 struct vif_params *params)
765 struct net_device *ndev;
766 struct ieee80211_sub_if_data *sdata = NULL;
771 ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size,
772 name, ieee80211_if_setup);
775 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
777 ndev->needed_headroom = local->tx_headroom +
778 4*6 /* four MAC addresses */
779 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
781 + 8 /* rfc1042/bridge tunnel */
782 - ETH_HLEN /* ethernet hard_header_len */
783 + IEEE80211_ENCRYPT_HEADROOM;
784 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
786 ret = dev_alloc_name(ndev, ndev->name);
790 memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
791 memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN);
792 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
794 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
795 sdata = netdev_priv(ndev);
796 ndev->ieee80211_ptr = &sdata->wdev;
798 /* initialise type-independent data */
799 sdata->wdev.wiphy = local->hw.wiphy;
800 sdata->local = local;
803 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
804 skb_queue_head_init(&sdata->fragments[i].skb_list);
806 INIT_LIST_HEAD(&sdata->key_list);
808 sdata->force_unicast_rateidx = -1;
809 sdata->max_ratectrl_rateidx = -1;
811 /* setup type-dependent data */
812 ieee80211_setup_sdata(sdata, type);
815 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
816 if (type == NL80211_IFTYPE_STATION)
817 sdata->u.mgd.use_4addr = params->use_4addr;
820 ret = register_netdevice(ndev);
824 if (ieee80211_vif_is_mesh(&sdata->vif) &&
825 params && params->mesh_id_len)
826 ieee80211_sdata_set_mesh_id(sdata,
830 mutex_lock(&local->iflist_mtx);
831 list_add_tail_rcu(&sdata->list, &local->interfaces);
832 mutex_unlock(&local->iflist_mtx);
844 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
848 mutex_lock(&sdata->local->iflist_mtx);
849 list_del_rcu(&sdata->list);
850 mutex_unlock(&sdata->local->iflist_mtx);
853 unregister_netdevice(sdata->dev);
857 * Remove all interfaces, may only be called at hardware unregistration
858 * time because it doesn't do RCU-safe list removals.
860 void ieee80211_remove_interfaces(struct ieee80211_local *local)
862 struct ieee80211_sub_if_data *sdata, *tmp;
863 LIST_HEAD(unreg_list);
867 mutex_lock(&local->iflist_mtx);
868 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
869 list_del(&sdata->list);
871 unregister_netdevice_queue(sdata->dev, &unreg_list);
873 mutex_unlock(&local->iflist_mtx);
874 unregister_netdevice_many(&unreg_list);
877 static u32 ieee80211_idle_off(struct ieee80211_local *local,
880 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
883 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
884 printk(KERN_DEBUG "%s: device no longer idle - %s\n",
885 wiphy_name(local->hw.wiphy), reason);
888 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
889 return IEEE80211_CONF_CHANGE_IDLE;
892 static u32 ieee80211_idle_on(struct ieee80211_local *local)
894 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
897 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
898 printk(KERN_DEBUG "%s: device now idle\n",
899 wiphy_name(local->hw.wiphy));
902 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
903 return IEEE80211_CONF_CHANGE_IDLE;
906 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
908 struct ieee80211_sub_if_data *sdata;
912 return ieee80211_idle_off(local, "scanning");
914 list_for_each_entry(sdata, &local->interfaces, list) {
915 if (!netif_running(sdata->dev))
917 /* do not count disabled managed interfaces */
918 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
919 !sdata->u.mgd.associated &&
920 list_empty(&sdata->u.mgd.work_list))
922 /* do not count unused IBSS interfaces */
923 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
924 !sdata->u.ibss.ssid_len)
926 /* count everything else */
931 return ieee80211_idle_on(local);
933 return ieee80211_idle_off(local, "in use");
938 void ieee80211_recalc_idle(struct ieee80211_local *local)
942 mutex_lock(&local->iflist_mtx);
943 chg = __ieee80211_recalc_idle(local);
944 mutex_unlock(&local->iflist_mtx);
946 ieee80211_hw_config(local, chg);