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 int ieee80211_change_mac(struct net_device *dev, void *addr)
65 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
68 if (ieee80211_sdata_running(sdata))
71 ret = eth_mac_addr(dev, addr);
74 memcpy(sdata->vif.addr, addr, ETH_ALEN);
79 static inline int identical_mac_addr_allowed(int type1, int type2)
81 return type1 == NL80211_IFTYPE_MONITOR ||
82 type2 == NL80211_IFTYPE_MONITOR ||
83 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
84 (type1 == NL80211_IFTYPE_WDS &&
85 (type2 == NL80211_IFTYPE_WDS ||
86 type2 == NL80211_IFTYPE_AP)) ||
87 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
88 (type1 == NL80211_IFTYPE_AP_VLAN &&
89 (type2 == NL80211_IFTYPE_AP ||
90 type2 == NL80211_IFTYPE_AP_VLAN));
93 static int ieee80211_open(struct net_device *dev)
95 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
96 struct ieee80211_sub_if_data *nsdata;
97 struct ieee80211_local *local = sdata->local;
99 struct ieee80211_if_init_conf conf;
102 u32 hw_reconf_flags = 0;
103 u8 null_addr[ETH_ALEN] = {0};
105 /* fail early if user set an invalid address */
106 if (compare_ether_addr(dev->dev_addr, null_addr) &&
107 !is_valid_ether_addr(dev->dev_addr))
108 return -EADDRNOTAVAIL;
110 /* we hold the RTNL here so can safely walk the list */
111 list_for_each_entry(nsdata, &local->interfaces, list) {
112 struct net_device *ndev = nsdata->dev;
114 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
116 * Allow only a single IBSS interface to be up at any
117 * time. This is restricted because beacon distribution
118 * cannot work properly if both are in the same IBSS.
120 * To remove this restriction we'd have to disallow them
121 * from setting the same SSID on different IBSS interfaces
122 * belonging to the same hardware. Then, however, we're
123 * faced with having to adopt two different TSF timers...
125 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
126 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
130 * The remaining checks are only performed for interfaces
131 * with the same MAC address.
133 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
137 * check whether it may have the same address
139 if (!identical_mac_addr_allowed(sdata->vif.type,
144 * can only add VLANs to enabled APs
146 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
147 nsdata->vif.type == NL80211_IFTYPE_AP)
148 sdata->bss = &nsdata->u.ap;
152 switch (sdata->vif.type) {
153 case NL80211_IFTYPE_WDS:
154 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
157 case NL80211_IFTYPE_AP_VLAN:
160 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
162 case NL80211_IFTYPE_AP:
163 sdata->bss = &sdata->u.ap;
165 case NL80211_IFTYPE_MESH_POINT:
166 if (!ieee80211_vif_is_mesh(&sdata->vif))
168 /* mesh ifaces must set allmulti to forward mcast traffic */
169 atomic_inc(&local->iff_allmultis);
171 case NL80211_IFTYPE_STATION:
172 case NL80211_IFTYPE_MONITOR:
173 case NL80211_IFTYPE_ADHOC:
174 /* no special treatment */
176 case NL80211_IFTYPE_UNSPECIFIED:
177 case __NL80211_IFTYPE_AFTER_LAST:
183 if (local->open_count == 0) {
184 res = drv_start(local);
187 /* we're brought up, everything changes */
188 hw_reconf_flags = ~0;
189 ieee80211_led_radio(local, true);
193 * Check all interfaces and copy the hopefully now-present
194 * MAC address to those that have the special null one.
196 list_for_each_entry(nsdata, &local->interfaces, list) {
197 struct net_device *ndev = nsdata->dev;
200 * No need to check running since we do not allow
201 * it to start up with this invalid address.
203 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) {
204 memcpy(ndev->dev_addr,
205 local->hw.wiphy->perm_addr,
207 memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN);
212 * Validate the MAC address for this device.
214 if (!is_valid_ether_addr(dev->dev_addr)) {
215 if (!local->open_count)
217 return -EADDRNOTAVAIL;
220 switch (sdata->vif.type) {
221 case NL80211_IFTYPE_AP_VLAN:
222 /* no need to tell driver */
224 case NL80211_IFTYPE_MONITOR:
225 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
226 local->cooked_mntrs++;
230 /* must be before the call to ieee80211_configure_filter */
232 if (local->monitors == 1) {
233 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
234 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
237 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
238 local->fif_fcsfail++;
239 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
240 local->fif_plcpfail++;
241 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
242 local->fif_control++;
245 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
246 local->fif_other_bss++;
248 ieee80211_configure_filter(local);
251 conf.vif = &sdata->vif;
252 conf.type = sdata->vif.type;
253 conf.mac_addr = sdata->vif.addr;
254 res = drv_add_interface(local, &conf);
258 if (ieee80211_vif_is_mesh(&sdata->vif)) {
259 local->fif_other_bss++;
260 ieee80211_configure_filter(local);
262 ieee80211_start_mesh(sdata);
263 } else if (sdata->vif.type == NL80211_IFTYPE_AP) {
266 ieee80211_configure_filter(local);
269 changed |= ieee80211_reset_erp_info(sdata);
270 ieee80211_bss_info_change_notify(sdata, changed);
271 ieee80211_enable_keys(sdata);
273 if (sdata->vif.type == NL80211_IFTYPE_STATION)
274 netif_carrier_off(dev);
276 netif_carrier_on(dev);
279 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
280 /* Create STA entry for the WDS peer */
281 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
285 goto err_del_interface;
288 /* no locking required since STA is not live yet */
289 sta->flags |= WLAN_STA_AUTHORIZED;
291 res = sta_info_insert(sta);
293 /* STA has been freed */
294 goto err_del_interface;
299 * set_multicast_list will be invoked by the networking core
300 * which will check whether any increments here were done in
301 * error and sync them down to the hardware as filter flags.
303 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
304 atomic_inc(&local->iff_allmultis);
306 if (sdata->flags & IEEE80211_SDATA_PROMISC)
307 atomic_inc(&local->iff_promiscs);
309 hw_reconf_flags |= __ieee80211_recalc_idle(local);
312 if (hw_reconf_flags) {
313 ieee80211_hw_config(local, hw_reconf_flags);
315 * set default queue parameters so drivers don't
316 * need to initialise the hardware if the hardware
317 * doesn't start up with sane defaults
319 ieee80211_set_wmm_default(sdata);
322 ieee80211_recalc_ps(local, -1);
325 * ieee80211_sta_work is disabled while network interface
326 * is down. Therefore, some configuration changes may not
327 * yet be effective. Trigger execution of ieee80211_sta_work
330 if (sdata->vif.type == NL80211_IFTYPE_STATION)
331 ieee80211_queue_work(&local->hw, &sdata->u.mgd.work);
333 netif_start_queue(dev);
337 drv_remove_interface(local, &conf);
339 if (!local->open_count)
343 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
344 list_del(&sdata->u.vlan.list);
348 static int ieee80211_stop(struct net_device *dev)
350 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
351 struct ieee80211_local *local = sdata->local;
352 struct ieee80211_if_init_conf conf;
353 struct sta_info *sta;
355 struct sk_buff *skb, *tmp;
356 u32 hw_reconf_flags = 0;
360 * Stop TX on this interface first.
362 netif_stop_queue(dev);
365 * Purge work for this interface.
367 ieee80211_work_purge(sdata);
370 * Now delete all active aggregation sessions.
374 list_for_each_entry_rcu(sta, &local->sta_list, list) {
375 if (sta->sdata == sdata)
376 ieee80211_sta_tear_down_BA_sessions(sta);
382 * Remove all stations associated with this interface.
384 * This must be done before calling ops->remove_interface()
385 * because otherwise we can later invoke ops->sta_notify()
386 * whenever the STAs are removed, and that invalidates driver
387 * assumptions about always getting a vif pointer that is valid
388 * (because if we remove a STA after ops->remove_interface()
389 * the driver will have removed the vif info already!)
391 * We could relax this and only unlink the stations from the
392 * hash table and list but keep them on a per-sdata list that
393 * will be inserted back again when the interface is brought
394 * up again, but I don't currently see a use case for that,
395 * except with WDS which gets a STA entry created when it is
398 sta_info_flush(local, sdata);
401 * Don't count this interface for promisc/allmulti while it
402 * is down. dev_mc_unsync() will invoke set_multicast_list
403 * on the master interface which will sync these down to the
404 * hardware as filter flags.
406 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
407 atomic_dec(&local->iff_allmultis);
409 if (sdata->flags & IEEE80211_SDATA_PROMISC)
410 atomic_dec(&local->iff_promiscs);
412 if (sdata->vif.type == NL80211_IFTYPE_AP)
415 netif_addr_lock_bh(dev);
416 spin_lock_bh(&local->filter_lock);
417 __dev_addr_unsync(&local->mc_list, &local->mc_count,
418 &dev->mc_list, &dev->mc_count);
419 spin_unlock_bh(&local->filter_lock);
420 netif_addr_unlock_bh(dev);
422 ieee80211_configure_filter(local);
424 del_timer_sync(&local->dynamic_ps_timer);
425 cancel_work_sync(&local->dynamic_ps_enable_work);
427 /* APs need special treatment */
428 if (sdata->vif.type == NL80211_IFTYPE_AP) {
429 struct ieee80211_sub_if_data *vlan, *tmpsdata;
430 struct beacon_data *old_beacon = sdata->u.ap.beacon;
433 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
437 /* down all dependent devices, that is VLANs */
438 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
440 dev_close(vlan->dev);
441 WARN_ON(!list_empty(&sdata->u.ap.vlans));
446 switch (sdata->vif.type) {
447 case NL80211_IFTYPE_AP_VLAN:
448 list_del(&sdata->u.vlan.list);
449 /* no need to tell driver */
451 case NL80211_IFTYPE_MONITOR:
452 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
453 local->cooked_mntrs--;
458 if (local->monitors == 0) {
459 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
460 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
463 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
464 local->fif_fcsfail--;
465 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
466 local->fif_plcpfail--;
467 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
469 local->fif_control--;
471 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
472 local->fif_other_bss--;
474 ieee80211_configure_filter(local);
476 case NL80211_IFTYPE_STATION:
477 del_timer_sync(&sdata->u.mgd.chswitch_timer);
478 del_timer_sync(&sdata->u.mgd.timer);
479 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
480 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
482 * If any of the timers fired while we waited for it, it will
483 * have queued its work. Now the work will be running again
484 * but will not rearm the timer again because it checks
485 * whether the interface is running, which, at this point,
488 cancel_work_sync(&sdata->u.mgd.work);
489 cancel_work_sync(&sdata->u.mgd.chswitch_work);
490 cancel_work_sync(&sdata->u.mgd.monitor_work);
491 cancel_work_sync(&sdata->u.mgd.beacon_loss_work);
494 * When we get here, the interface is marked down.
495 * Call synchronize_rcu() to wait for the RX path
496 * should it be using the interface and enqueuing
497 * frames at this very time on another CPU.
500 skb_queue_purge(&sdata->u.mgd.skb_queue);
502 case NL80211_IFTYPE_ADHOC:
503 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
504 del_timer_sync(&sdata->u.ibss.timer);
505 cancel_work_sync(&sdata->u.ibss.work);
507 skb_queue_purge(&sdata->u.ibss.skb_queue);
510 case NL80211_IFTYPE_MESH_POINT:
511 if (ieee80211_vif_is_mesh(&sdata->vif)) {
512 /* other_bss and allmulti are always set on mesh
514 local->fif_other_bss--;
515 atomic_dec(&local->iff_allmultis);
517 ieee80211_configure_filter(local);
519 ieee80211_stop_mesh(sdata);
523 if (local->scan_sdata == sdata)
524 ieee80211_scan_cancel(local);
527 * Disable beaconing for AP and mesh, IBSS can't
528 * still be joined to a network at this point.
530 if (sdata->vif.type == NL80211_IFTYPE_AP ||
531 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
532 ieee80211_bss_info_change_notify(sdata,
533 BSS_CHANGED_BEACON_ENABLED);
536 conf.vif = &sdata->vif;
537 conf.type = sdata->vif.type;
538 conf.mac_addr = sdata->vif.addr;
539 /* disable all keys for as long as this netdev is down */
540 ieee80211_disable_keys(sdata);
541 drv_remove_interface(local, &conf);
546 hw_reconf_flags |= __ieee80211_recalc_idle(local);
548 ieee80211_recalc_ps(local, -1);
550 if (local->open_count == 0) {
551 ieee80211_clear_tx_pending(local);
552 ieee80211_stop_device(local);
554 /* no reconfiguring after stop! */
558 /* do after stop to avoid reconfiguring when we stop anyway */
560 ieee80211_hw_config(local, hw_reconf_flags);
562 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
563 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
564 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
565 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
566 if (info->control.vif == &sdata->vif) {
567 __skb_unlink(skb, &local->pending[i]);
568 dev_kfree_skb_irq(skb);
572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
577 static void ieee80211_set_multicast_list(struct net_device *dev)
579 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
580 struct ieee80211_local *local = sdata->local;
581 int allmulti, promisc, sdata_allmulti, sdata_promisc;
583 allmulti = !!(dev->flags & IFF_ALLMULTI);
584 promisc = !!(dev->flags & IFF_PROMISC);
585 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
586 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
588 if (allmulti != sdata_allmulti) {
589 if (dev->flags & IFF_ALLMULTI)
590 atomic_inc(&local->iff_allmultis);
592 atomic_dec(&local->iff_allmultis);
593 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
596 if (promisc != sdata_promisc) {
597 if (dev->flags & IFF_PROMISC)
598 atomic_inc(&local->iff_promiscs);
600 atomic_dec(&local->iff_promiscs);
601 sdata->flags ^= IEEE80211_SDATA_PROMISC;
603 spin_lock_bh(&local->filter_lock);
604 __dev_addr_sync(&local->mc_list, &local->mc_count,
605 &dev->mc_list, &dev->mc_count);
606 spin_unlock_bh(&local->filter_lock);
607 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
611 * Called when the netdev is removed or, by the code below, before
612 * the interface type changes.
614 static void ieee80211_teardown_sdata(struct net_device *dev)
616 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
617 struct ieee80211_local *local = sdata->local;
618 struct beacon_data *beacon;
623 /* free extra data */
624 ieee80211_free_keys(sdata);
626 ieee80211_debugfs_remove_netdev(sdata);
628 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
629 __skb_queue_purge(&sdata->fragments[i].skb_list);
630 sdata->fragment_next = 0;
632 switch (sdata->vif.type) {
633 case NL80211_IFTYPE_AP:
634 beacon = sdata->u.ap.beacon;
635 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
639 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
640 local->total_ps_buffered--;
645 case NL80211_IFTYPE_MESH_POINT:
646 if (ieee80211_vif_is_mesh(&sdata->vif))
647 mesh_rmc_free(sdata);
649 case NL80211_IFTYPE_ADHOC:
650 if (WARN_ON(sdata->u.ibss.presp))
651 kfree_skb(sdata->u.ibss.presp);
653 case NL80211_IFTYPE_STATION:
654 case NL80211_IFTYPE_WDS:
655 case NL80211_IFTYPE_AP_VLAN:
656 case NL80211_IFTYPE_MONITOR:
658 case NL80211_IFTYPE_UNSPECIFIED:
659 case __NL80211_IFTYPE_AFTER_LAST:
664 flushed = sta_info_flush(local, sdata);
668 static const struct net_device_ops ieee80211_dataif_ops = {
669 .ndo_open = ieee80211_open,
670 .ndo_stop = ieee80211_stop,
671 .ndo_uninit = ieee80211_teardown_sdata,
672 .ndo_start_xmit = ieee80211_subif_start_xmit,
673 .ndo_set_multicast_list = ieee80211_set_multicast_list,
674 .ndo_change_mtu = ieee80211_change_mtu,
675 .ndo_set_mac_address = ieee80211_change_mac,
678 static const struct net_device_ops ieee80211_monitorif_ops = {
679 .ndo_open = ieee80211_open,
680 .ndo_stop = ieee80211_stop,
681 .ndo_uninit = ieee80211_teardown_sdata,
682 .ndo_start_xmit = ieee80211_monitor_start_xmit,
683 .ndo_set_multicast_list = ieee80211_set_multicast_list,
684 .ndo_change_mtu = ieee80211_change_mtu,
685 .ndo_set_mac_address = eth_mac_addr,
688 static void ieee80211_if_setup(struct net_device *dev)
691 dev->netdev_ops = &ieee80211_dataif_ops;
692 dev->destructor = free_netdev;
696 * Helper function to initialise an interface to a specific type.
698 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
699 enum nl80211_iftype type)
701 /* clear type-dependent union */
702 memset(&sdata->u, 0, sizeof(sdata->u));
704 /* and set some type-dependent values */
705 sdata->vif.type = type;
706 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
707 sdata->wdev.iftype = type;
709 /* only monitor differs */
710 sdata->dev->type = ARPHRD_ETHER;
713 case NL80211_IFTYPE_AP:
714 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
715 INIT_LIST_HEAD(&sdata->u.ap.vlans);
717 case NL80211_IFTYPE_STATION:
718 ieee80211_sta_setup_sdata(sdata);
720 case NL80211_IFTYPE_ADHOC:
721 ieee80211_ibss_setup_sdata(sdata);
723 case NL80211_IFTYPE_MESH_POINT:
724 if (ieee80211_vif_is_mesh(&sdata->vif))
725 ieee80211_mesh_init_sdata(sdata);
727 case NL80211_IFTYPE_MONITOR:
728 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
729 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
730 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
731 MONITOR_FLAG_OTHER_BSS;
733 case NL80211_IFTYPE_WDS:
734 case NL80211_IFTYPE_AP_VLAN:
736 case NL80211_IFTYPE_UNSPECIFIED:
737 case __NL80211_IFTYPE_AFTER_LAST:
742 ieee80211_debugfs_add_netdev(sdata);
745 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
746 enum nl80211_iftype type)
750 if (type == sdata->vif.type)
753 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
754 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
755 type == NL80211_IFTYPE_ADHOC)
759 * We could, here, on changes between IBSS/STA/MESH modes,
760 * invoke an MLME function instead that disassociates etc.
761 * and goes into the requested mode.
764 if (ieee80211_sdata_running(sdata))
767 /* Purge and reset type-dependent state. */
768 ieee80211_teardown_sdata(sdata->dev);
769 ieee80211_setup_sdata(sdata, type);
771 /* reset some values that shouldn't be kept across type changes */
772 sdata->vif.bss_conf.basic_rates =
773 ieee80211_mandatory_rates(sdata->local,
774 sdata->local->hw.conf.channel->band);
775 sdata->drop_unencrypted = 0;
776 if (type == NL80211_IFTYPE_STATION)
777 sdata->u.mgd.use_4addr = false;
782 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
783 struct net_device **new_dev, enum nl80211_iftype type,
784 struct vif_params *params)
786 struct net_device *ndev;
787 struct ieee80211_sub_if_data *sdata = NULL;
792 ndev = alloc_netdev(sizeof(*sdata) + local->hw.vif_data_size,
793 name, ieee80211_if_setup);
796 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
798 ndev->needed_headroom = local->tx_headroom +
799 4*6 /* four MAC addresses */
800 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
802 + 8 /* rfc1042/bridge tunnel */
803 - ETH_HLEN /* ethernet hard_header_len */
804 + IEEE80211_ENCRYPT_HEADROOM;
805 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
807 ret = dev_alloc_name(ndev, ndev->name);
811 memcpy(ndev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
812 memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN);
813 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
815 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
816 sdata = netdev_priv(ndev);
817 ndev->ieee80211_ptr = &sdata->wdev;
818 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
819 memcpy(sdata->name, ndev->name, IFNAMSIZ);
821 /* initialise type-independent data */
822 sdata->wdev.wiphy = local->hw.wiphy;
823 sdata->local = local;
826 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
827 skb_queue_head_init(&sdata->fragments[i].skb_list);
829 INIT_LIST_HEAD(&sdata->key_list);
831 sdata->force_unicast_rateidx = -1;
832 sdata->max_ratectrl_rateidx = -1;
834 /* setup type-dependent data */
835 ieee80211_setup_sdata(sdata, type);
838 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
839 if (type == NL80211_IFTYPE_STATION)
840 sdata->u.mgd.use_4addr = params->use_4addr;
843 ret = register_netdevice(ndev);
847 if (ieee80211_vif_is_mesh(&sdata->vif) &&
848 params && params->mesh_id_len)
849 ieee80211_sdata_set_mesh_id(sdata,
853 mutex_lock(&local->iflist_mtx);
854 list_add_tail_rcu(&sdata->list, &local->interfaces);
855 mutex_unlock(&local->iflist_mtx);
867 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
871 mutex_lock(&sdata->local->iflist_mtx);
872 list_del_rcu(&sdata->list);
873 mutex_unlock(&sdata->local->iflist_mtx);
876 unregister_netdevice(sdata->dev);
880 * Remove all interfaces, may only be called at hardware unregistration
881 * time because it doesn't do RCU-safe list removals.
883 void ieee80211_remove_interfaces(struct ieee80211_local *local)
885 struct ieee80211_sub_if_data *sdata, *tmp;
886 LIST_HEAD(unreg_list);
890 mutex_lock(&local->iflist_mtx);
891 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
892 list_del(&sdata->list);
894 unregister_netdevice_queue(sdata->dev, &unreg_list);
896 mutex_unlock(&local->iflist_mtx);
897 unregister_netdevice_many(&unreg_list);
900 static u32 ieee80211_idle_off(struct ieee80211_local *local,
903 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
906 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
907 printk(KERN_DEBUG "%s: device no longer idle - %s\n",
908 wiphy_name(local->hw.wiphy), reason);
911 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
912 return IEEE80211_CONF_CHANGE_IDLE;
915 static u32 ieee80211_idle_on(struct ieee80211_local *local)
917 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
920 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
921 printk(KERN_DEBUG "%s: device now idle\n",
922 wiphy_name(local->hw.wiphy));
925 drv_flush(local, false);
927 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
928 return IEEE80211_CONF_CHANGE_IDLE;
931 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
933 struct ieee80211_sub_if_data *sdata;
936 if (!list_empty(&local->work_list))
937 return ieee80211_idle_off(local, "working");
940 return ieee80211_idle_off(local, "scanning");
942 list_for_each_entry(sdata, &local->interfaces, list) {
943 if (!ieee80211_sdata_running(sdata))
945 /* do not count disabled managed interfaces */
946 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
947 !sdata->u.mgd.associated)
949 /* do not count unused IBSS interfaces */
950 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
951 !sdata->u.ibss.ssid_len)
953 /* count everything else */
958 return ieee80211_idle_on(local);
960 return ieee80211_idle_off(local, "in use");
965 void ieee80211_recalc_idle(struct ieee80211_local *local)
969 mutex_lock(&local->iflist_mtx);
970 chg = __ieee80211_recalc_idle(local);
971 mutex_unlock(&local->iflist_mtx);
973 ieee80211_hw_config(local, chg);
976 static int netdev_notify(struct notifier_block *nb,
980 struct net_device *dev = ndev;
981 struct ieee80211_sub_if_data *sdata;
983 if (state != NETDEV_CHANGENAME)
986 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
989 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
992 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
994 memcpy(sdata->name, sdata->name, IFNAMSIZ);
996 ieee80211_debugfs_rename_netdev(sdata);
1000 static struct notifier_block mac80211_netdev_notifier = {
1001 .notifier_call = netdev_notify,
1004 int ieee80211_iface_init(void)
1006 return register_netdevice_notifier(&mac80211_netdev_notifier);
1009 void ieee80211_iface_exit(void)
1011 unregister_netdevice_notifier(&mac80211_netdev_notifier);