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"
29 * DOC: Interface list locking
31 * The interface list in each struct ieee80211_local is protected
34 * (1) modifications may only be done under the RTNL
35 * (2) modifications and readers are protected against each other by
37 * (3) modifications are done in an RCU manner so atomic readers
38 * can traverse the list in RCU-safe blocks.
40 * As a consequence, reads (traversals) of the list can be protected
41 * by either the RTNL, the iflist_mtx or RCU.
45 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
48 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
50 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
52 /* FIX: what would be proper limits for MTU?
53 * This interface uses 802.3 frames. */
55 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
59 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
60 printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
61 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
66 static int ieee80211_change_mac(struct net_device *dev, void *addr)
68 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
69 struct sockaddr *sa = addr;
72 if (ieee80211_sdata_running(sdata))
75 ret = eth_mac_addr(dev, sa);
78 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
83 static inline int identical_mac_addr_allowed(int type1, int type2)
85 return type1 == NL80211_IFTYPE_MONITOR ||
86 type2 == NL80211_IFTYPE_MONITOR ||
87 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
88 (type1 == NL80211_IFTYPE_WDS &&
89 (type2 == NL80211_IFTYPE_WDS ||
90 type2 == NL80211_IFTYPE_AP)) ||
91 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
92 (type1 == NL80211_IFTYPE_AP_VLAN &&
93 (type2 == NL80211_IFTYPE_AP ||
94 type2 == NL80211_IFTYPE_AP_VLAN));
97 static int ieee80211_open(struct net_device *dev)
99 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
100 struct ieee80211_sub_if_data *nsdata;
101 struct ieee80211_local *local = sdata->local;
102 struct sta_info *sta;
105 u32 hw_reconf_flags = 0;
106 u8 null_addr[ETH_ALEN] = {0};
108 /* fail early if user set an invalid address */
109 if (compare_ether_addr(dev->dev_addr, null_addr) &&
110 !is_valid_ether_addr(dev->dev_addr))
111 return -EADDRNOTAVAIL;
113 /* we hold the RTNL here so can safely walk the list */
114 list_for_each_entry(nsdata, &local->interfaces, list) {
115 struct net_device *ndev = nsdata->dev;
117 if (ndev != dev && ieee80211_sdata_running(nsdata)) {
119 * Allow only a single IBSS interface to be up at any
120 * time. This is restricted because beacon distribution
121 * cannot work properly if both are in the same IBSS.
123 * To remove this restriction we'd have to disallow them
124 * from setting the same SSID on different IBSS interfaces
125 * belonging to the same hardware. Then, however, we're
126 * faced with having to adopt two different TSF timers...
128 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
129 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
133 * The remaining checks are only performed for interfaces
134 * with the same MAC address.
136 if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
140 * check whether it may have the same address
142 if (!identical_mac_addr_allowed(sdata->vif.type,
147 * can only add VLANs to enabled APs
149 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
150 nsdata->vif.type == NL80211_IFTYPE_AP)
151 sdata->bss = &nsdata->u.ap;
155 switch (sdata->vif.type) {
156 case NL80211_IFTYPE_WDS:
157 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
160 case NL80211_IFTYPE_AP_VLAN:
163 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
165 case NL80211_IFTYPE_AP:
166 sdata->bss = &sdata->u.ap;
168 case NL80211_IFTYPE_MESH_POINT:
169 if (!ieee80211_vif_is_mesh(&sdata->vif))
171 /* mesh ifaces must set allmulti to forward mcast traffic */
172 atomic_inc(&local->iff_allmultis);
174 case NL80211_IFTYPE_STATION:
175 case NL80211_IFTYPE_MONITOR:
176 case NL80211_IFTYPE_ADHOC:
177 /* no special treatment */
179 case NL80211_IFTYPE_UNSPECIFIED:
180 case __NL80211_IFTYPE_AFTER_LAST:
186 if (local->open_count == 0) {
187 res = drv_start(local);
190 /* we're brought up, everything changes */
191 hw_reconf_flags = ~0;
192 ieee80211_led_radio(local, true);
196 * Check all interfaces and copy the hopefully now-present
197 * MAC address to those that have the special null one.
199 list_for_each_entry(nsdata, &local->interfaces, list) {
200 struct net_device *ndev = nsdata->dev;
203 * No need to check running since we do not allow
204 * it to start up with this invalid address.
206 if (compare_ether_addr(null_addr, ndev->dev_addr) == 0) {
207 memcpy(ndev->dev_addr,
208 local->hw.wiphy->perm_addr,
210 memcpy(ndev->perm_addr, ndev->dev_addr, ETH_ALEN);
215 * Validate the MAC address for this device.
217 if (!is_valid_ether_addr(dev->dev_addr)) {
218 if (!local->open_count)
220 return -EADDRNOTAVAIL;
223 switch (sdata->vif.type) {
224 case NL80211_IFTYPE_AP_VLAN:
225 /* no need to tell driver */
227 case NL80211_IFTYPE_MONITOR:
228 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
229 local->cooked_mntrs++;
233 /* must be before the call to ieee80211_configure_filter */
235 if (local->monitors == 1) {
236 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
237 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
240 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
241 local->fif_fcsfail++;
242 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
243 local->fif_plcpfail++;
244 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
245 local->fif_control++;
248 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
249 local->fif_other_bss++;
251 ieee80211_configure_filter(local);
254 res = drv_add_interface(local, &sdata->vif);
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);
272 if (sdata->vif.type == NL80211_IFTYPE_STATION)
273 netif_carrier_off(dev);
275 netif_carrier_on(dev);
278 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
279 /* Create STA entry for the WDS peer */
280 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
284 goto err_del_interface;
287 /* no locking required since STA is not live yet */
288 sta->flags |= WLAN_STA_AUTHORIZED;
290 res = sta_info_insert(sta);
292 /* STA has been freed */
293 goto err_del_interface;
298 * set_multicast_list will be invoked by the networking core
299 * which will check whether any increments here were done in
300 * error and sync them down to the hardware as filter flags.
302 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
303 atomic_inc(&local->iff_allmultis);
305 if (sdata->flags & IEEE80211_SDATA_PROMISC)
306 atomic_inc(&local->iff_promiscs);
308 hw_reconf_flags |= __ieee80211_recalc_idle(local);
311 if (hw_reconf_flags) {
312 ieee80211_hw_config(local, hw_reconf_flags);
314 * set default queue parameters so drivers don't
315 * need to initialise the hardware if the hardware
316 * doesn't start up with sane defaults
318 ieee80211_set_wmm_default(sdata);
321 ieee80211_recalc_ps(local, -1);
323 netif_tx_start_all_queues(dev);
327 drv_remove_interface(local, &sdata->vif);
329 if (!local->open_count)
333 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
334 list_del(&sdata->u.vlan.list);
338 static int ieee80211_stop(struct net_device *dev)
340 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
341 struct ieee80211_local *local = sdata->local;
342 struct sta_info *sta;
344 struct sk_buff *skb, *tmp;
345 u32 hw_reconf_flags = 0;
349 * Stop TX on this interface first.
351 netif_tx_stop_all_queues(dev);
354 * Purge work for this interface.
356 ieee80211_work_purge(sdata);
359 * Now delete all active aggregation sessions.
363 list_for_each_entry_rcu(sta, &local->sta_list, list) {
364 if (sta->sdata == sdata)
365 ieee80211_sta_tear_down_BA_sessions(sta);
371 * Remove all stations associated with this interface.
373 * This must be done before calling ops->remove_interface()
374 * because otherwise we can later invoke ops->sta_notify()
375 * whenever the STAs are removed, and that invalidates driver
376 * assumptions about always getting a vif pointer that is valid
377 * (because if we remove a STA after ops->remove_interface()
378 * the driver will have removed the vif info already!)
380 * We could relax this and only unlink the stations from the
381 * hash table and list but keep them on a per-sdata list that
382 * will be inserted back again when the interface is brought
383 * up again, but I don't currently see a use case for that,
384 * except with WDS which gets a STA entry created when it is
387 sta_info_flush(local, sdata);
390 * Don't count this interface for promisc/allmulti while it
391 * is down. dev_mc_unsync() will invoke set_multicast_list
392 * on the master interface which will sync these down to the
393 * hardware as filter flags.
395 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
396 atomic_dec(&local->iff_allmultis);
398 if (sdata->flags & IEEE80211_SDATA_PROMISC)
399 atomic_dec(&local->iff_promiscs);
401 if (sdata->vif.type == NL80211_IFTYPE_AP)
404 netif_addr_lock_bh(dev);
405 spin_lock_bh(&local->filter_lock);
406 __hw_addr_unsync(&local->mc_list, &dev->mc, dev->addr_len);
407 spin_unlock_bh(&local->filter_lock);
408 netif_addr_unlock_bh(dev);
410 ieee80211_configure_filter(local);
412 del_timer_sync(&local->dynamic_ps_timer);
413 cancel_work_sync(&local->dynamic_ps_enable_work);
415 /* APs need special treatment */
416 if (sdata->vif.type == NL80211_IFTYPE_AP) {
417 struct ieee80211_sub_if_data *vlan, *tmpsdata;
418 struct beacon_data *old_beacon = sdata->u.ap.beacon;
421 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
425 /* down all dependent devices, that is VLANs */
426 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
428 dev_close(vlan->dev);
429 WARN_ON(!list_empty(&sdata->u.ap.vlans));
434 switch (sdata->vif.type) {
435 case NL80211_IFTYPE_AP_VLAN:
436 list_del(&sdata->u.vlan.list);
437 /* no need to tell driver */
439 case NL80211_IFTYPE_MONITOR:
440 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
441 local->cooked_mntrs--;
446 if (local->monitors == 0) {
447 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
448 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
451 if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
452 local->fif_fcsfail--;
453 if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
454 local->fif_plcpfail--;
455 if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL) {
457 local->fif_control--;
459 if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
460 local->fif_other_bss--;
462 ieee80211_configure_filter(local);
464 case NL80211_IFTYPE_STATION:
465 del_timer_sync(&sdata->u.mgd.chswitch_timer);
466 del_timer_sync(&sdata->u.mgd.timer);
467 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
468 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
470 * If any of the timers fired while we waited for it, it will
471 * have queued its work. Now the work will be running again
472 * but will not rearm the timer again because it checks
473 * whether the interface is running, which, at this point,
476 cancel_work_sync(&sdata->u.mgd.work);
477 cancel_work_sync(&sdata->u.mgd.chswitch_work);
478 cancel_work_sync(&sdata->u.mgd.monitor_work);
479 cancel_work_sync(&sdata->u.mgd.beacon_connection_loss_work);
482 * When we get here, the interface is marked down.
483 * Call synchronize_rcu() to wait for the RX path
484 * should it be using the interface and enqueuing
485 * frames at this very time on another CPU.
488 skb_queue_purge(&sdata->u.mgd.skb_queue);
490 case NL80211_IFTYPE_ADHOC:
491 if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
492 del_timer_sync(&sdata->u.ibss.timer);
493 cancel_work_sync(&sdata->u.ibss.work);
495 skb_queue_purge(&sdata->u.ibss.skb_queue);
498 case NL80211_IFTYPE_MESH_POINT:
499 if (ieee80211_vif_is_mesh(&sdata->vif)) {
500 /* other_bss and allmulti are always set on mesh
502 local->fif_other_bss--;
503 atomic_dec(&local->iff_allmultis);
505 ieee80211_configure_filter(local);
507 ieee80211_stop_mesh(sdata);
511 if (local->scan_sdata == sdata)
512 ieee80211_scan_cancel(local);
515 * Disable beaconing for AP and mesh, IBSS can't
516 * still be joined to a network at this point.
518 if (sdata->vif.type == NL80211_IFTYPE_AP ||
519 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
520 ieee80211_bss_info_change_notify(sdata,
521 BSS_CHANGED_BEACON_ENABLED);
524 /* free all remaining keys, there shouldn't be any */
525 ieee80211_free_keys(sdata);
526 drv_remove_interface(local, &sdata->vif);
531 hw_reconf_flags |= __ieee80211_recalc_idle(local);
533 ieee80211_recalc_ps(local, -1);
535 if (local->open_count == 0) {
536 ieee80211_clear_tx_pending(local);
537 ieee80211_stop_device(local);
539 /* no reconfiguring after stop! */
543 /* do after stop to avoid reconfiguring when we stop anyway */
545 ieee80211_hw_config(local, hw_reconf_flags);
547 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
548 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
549 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
550 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
551 if (info->control.vif == &sdata->vif) {
552 __skb_unlink(skb, &local->pending[i]);
553 dev_kfree_skb_irq(skb);
557 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
562 static void ieee80211_set_multicast_list(struct net_device *dev)
564 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
565 struct ieee80211_local *local = sdata->local;
566 int allmulti, promisc, sdata_allmulti, sdata_promisc;
568 allmulti = !!(dev->flags & IFF_ALLMULTI);
569 promisc = !!(dev->flags & IFF_PROMISC);
570 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
571 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
573 if (allmulti != sdata_allmulti) {
574 if (dev->flags & IFF_ALLMULTI)
575 atomic_inc(&local->iff_allmultis);
577 atomic_dec(&local->iff_allmultis);
578 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
581 if (promisc != sdata_promisc) {
582 if (dev->flags & IFF_PROMISC)
583 atomic_inc(&local->iff_promiscs);
585 atomic_dec(&local->iff_promiscs);
586 sdata->flags ^= IEEE80211_SDATA_PROMISC;
588 spin_lock_bh(&local->filter_lock);
589 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
590 spin_unlock_bh(&local->filter_lock);
591 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
595 * Called when the netdev is removed or, by the code below, before
596 * the interface type changes.
598 static void ieee80211_teardown_sdata(struct net_device *dev)
600 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
601 struct ieee80211_local *local = sdata->local;
602 struct beacon_data *beacon;
607 /* free extra data */
608 ieee80211_free_keys(sdata);
610 ieee80211_debugfs_remove_netdev(sdata);
612 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
613 __skb_queue_purge(&sdata->fragments[i].skb_list);
614 sdata->fragment_next = 0;
616 switch (sdata->vif.type) {
617 case NL80211_IFTYPE_AP:
618 beacon = sdata->u.ap.beacon;
619 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
623 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
624 local->total_ps_buffered--;
629 case NL80211_IFTYPE_MESH_POINT:
630 if (ieee80211_vif_is_mesh(&sdata->vif))
631 mesh_rmc_free(sdata);
633 case NL80211_IFTYPE_ADHOC:
634 if (WARN_ON(sdata->u.ibss.presp))
635 kfree_skb(sdata->u.ibss.presp);
637 case NL80211_IFTYPE_STATION:
638 case NL80211_IFTYPE_WDS:
639 case NL80211_IFTYPE_AP_VLAN:
640 case NL80211_IFTYPE_MONITOR:
642 case NL80211_IFTYPE_UNSPECIFIED:
643 case __NL80211_IFTYPE_AFTER_LAST:
648 flushed = sta_info_flush(local, sdata);
652 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
655 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
658 static const struct net_device_ops ieee80211_dataif_ops = {
659 .ndo_open = ieee80211_open,
660 .ndo_stop = ieee80211_stop,
661 .ndo_uninit = ieee80211_teardown_sdata,
662 .ndo_start_xmit = ieee80211_subif_start_xmit,
663 .ndo_set_multicast_list = ieee80211_set_multicast_list,
664 .ndo_change_mtu = ieee80211_change_mtu,
665 .ndo_set_mac_address = ieee80211_change_mac,
666 .ndo_select_queue = ieee80211_netdev_select_queue,
669 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
672 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
673 struct ieee80211_local *local = sdata->local;
674 struct ieee80211_hdr *hdr;
675 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
678 if (local->hw.queues < 4)
682 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
683 return 0; /* doesn't matter, frame will be dropped */
685 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
687 if (!ieee80211_is_data(hdr->frame_control)) {
689 return ieee802_1d_to_ac[skb->priority];
691 if (!ieee80211_is_data_qos(hdr->frame_control)) {
693 return ieee802_1d_to_ac[skb->priority];
696 p = ieee80211_get_qos_ctl(hdr);
697 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
699 return ieee80211_downgrade_queue(local, skb);
702 static const struct net_device_ops ieee80211_monitorif_ops = {
703 .ndo_open = ieee80211_open,
704 .ndo_stop = ieee80211_stop,
705 .ndo_uninit = ieee80211_teardown_sdata,
706 .ndo_start_xmit = ieee80211_monitor_start_xmit,
707 .ndo_set_multicast_list = ieee80211_set_multicast_list,
708 .ndo_change_mtu = ieee80211_change_mtu,
709 .ndo_set_mac_address = eth_mac_addr,
710 .ndo_select_queue = ieee80211_monitor_select_queue,
713 static void ieee80211_if_setup(struct net_device *dev)
716 dev->netdev_ops = &ieee80211_dataif_ops;
717 dev->destructor = free_netdev;
721 * Helper function to initialise an interface to a specific type.
723 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
724 enum nl80211_iftype type)
726 /* clear type-dependent union */
727 memset(&sdata->u, 0, sizeof(sdata->u));
729 /* and set some type-dependent values */
730 sdata->vif.type = type;
731 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
732 sdata->wdev.iftype = type;
734 /* only monitor differs */
735 sdata->dev->type = ARPHRD_ETHER;
738 case NL80211_IFTYPE_AP:
739 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
740 INIT_LIST_HEAD(&sdata->u.ap.vlans);
742 case NL80211_IFTYPE_STATION:
743 ieee80211_sta_setup_sdata(sdata);
745 case NL80211_IFTYPE_ADHOC:
746 ieee80211_ibss_setup_sdata(sdata);
748 case NL80211_IFTYPE_MESH_POINT:
749 if (ieee80211_vif_is_mesh(&sdata->vif))
750 ieee80211_mesh_init_sdata(sdata);
752 case NL80211_IFTYPE_MONITOR:
753 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
754 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
755 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
756 MONITOR_FLAG_OTHER_BSS;
758 case NL80211_IFTYPE_WDS:
759 case NL80211_IFTYPE_AP_VLAN:
761 case NL80211_IFTYPE_UNSPECIFIED:
762 case __NL80211_IFTYPE_AFTER_LAST:
767 ieee80211_debugfs_add_netdev(sdata);
770 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
771 enum nl80211_iftype type)
775 if (type == sdata->vif.type)
778 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
779 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
780 type == NL80211_IFTYPE_ADHOC)
784 * We could, here, on changes between IBSS/STA/MESH modes,
785 * invoke an MLME function instead that disassociates etc.
786 * and goes into the requested mode.
789 if (ieee80211_sdata_running(sdata))
792 /* Purge and reset type-dependent state. */
793 ieee80211_teardown_sdata(sdata->dev);
794 ieee80211_setup_sdata(sdata, type);
796 /* reset some values that shouldn't be kept across type changes */
797 sdata->vif.bss_conf.basic_rates =
798 ieee80211_mandatory_rates(sdata->local,
799 sdata->local->hw.conf.channel->band);
800 sdata->drop_unencrypted = 0;
801 if (type == NL80211_IFTYPE_STATION)
802 sdata->u.mgd.use_4addr = false;
807 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
808 struct net_device *dev,
809 enum nl80211_iftype type)
811 struct ieee80211_sub_if_data *sdata;
812 u64 mask, start, addr, val, inc;
814 u8 tmp_addr[ETH_ALEN];
817 /* default ... something at least */
818 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
820 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
821 local->hw.wiphy->n_addresses <= 1)
825 mutex_lock(&local->iflist_mtx);
828 case NL80211_IFTYPE_MONITOR:
831 case NL80211_IFTYPE_WDS:
832 case NL80211_IFTYPE_AP_VLAN:
833 /* match up with an AP interface */
834 list_for_each_entry(sdata, &local->interfaces, list) {
835 if (sdata->vif.type != NL80211_IFTYPE_AP)
837 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
840 /* keep default if no AP interface present */
843 /* assign a new address if possible -- try n_addresses first */
844 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
847 list_for_each_entry(sdata, &local->interfaces, list) {
848 if (memcmp(local->hw.wiphy->addresses[i].addr,
849 sdata->vif.addr, ETH_ALEN) == 0) {
856 memcpy(dev->perm_addr,
857 local->hw.wiphy->addresses[i].addr,
863 /* try mask if available */
864 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
867 m = local->hw.wiphy->addr_mask;
868 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
869 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
870 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
872 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
873 /* not a contiguous mask ... not handled now! */
874 printk(KERN_DEBUG "not contiguous\n");
878 m = local->hw.wiphy->perm_addr;
879 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
880 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
881 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
883 inc = 1ULL<<__ffs64(mask);
884 val = (start & mask);
885 addr = (start & ~mask) | (val & mask);
889 tmp_addr[5] = addr >> 0*8;
890 tmp_addr[4] = addr >> 1*8;
891 tmp_addr[3] = addr >> 2*8;
892 tmp_addr[2] = addr >> 3*8;
893 tmp_addr[1] = addr >> 4*8;
894 tmp_addr[0] = addr >> 5*8;
898 list_for_each_entry(sdata, &local->interfaces, list) {
899 if (memcmp(tmp_addr, sdata->vif.addr,
907 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
910 addr = (start & ~mask) | (val & mask);
911 } while (addr != start);
916 mutex_unlock(&local->iflist_mtx);
919 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
920 struct net_device **new_dev, enum nl80211_iftype type,
921 struct vif_params *params)
923 struct net_device *ndev;
924 struct ieee80211_sub_if_data *sdata = NULL;
929 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
930 name, ieee80211_if_setup, local->hw.queues);
933 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
935 ndev->needed_headroom = local->tx_headroom +
936 4*6 /* four MAC addresses */
937 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
939 + 8 /* rfc1042/bridge tunnel */
940 - ETH_HLEN /* ethernet hard_header_len */
941 + IEEE80211_ENCRYPT_HEADROOM;
942 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
944 ret = dev_alloc_name(ndev, ndev->name);
948 ieee80211_assign_perm_addr(local, ndev, type);
949 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
950 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
952 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
953 sdata = netdev_priv(ndev);
954 ndev->ieee80211_ptr = &sdata->wdev;
955 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
956 memcpy(sdata->name, ndev->name, IFNAMSIZ);
958 /* initialise type-independent data */
959 sdata->wdev.wiphy = local->hw.wiphy;
960 sdata->local = local;
963 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
964 skb_queue_head_init(&sdata->fragments[i].skb_list);
966 INIT_LIST_HEAD(&sdata->key_list);
968 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
969 struct ieee80211_supported_band *sband;
970 sband = local->hw.wiphy->bands[i];
971 sdata->rc_rateidx_mask[i] =
972 sband ? (1 << sband->n_bitrates) - 1 : 0;
975 /* setup type-dependent data */
976 ieee80211_setup_sdata(sdata, type);
979 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
980 if (type == NL80211_IFTYPE_STATION)
981 sdata->u.mgd.use_4addr = params->use_4addr;
984 ret = register_netdevice(ndev);
988 if (ieee80211_vif_is_mesh(&sdata->vif) &&
989 params && params->mesh_id_len)
990 ieee80211_sdata_set_mesh_id(sdata,
994 mutex_lock(&local->iflist_mtx);
995 list_add_tail_rcu(&sdata->list, &local->interfaces);
996 mutex_unlock(&local->iflist_mtx);
1008 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1012 mutex_lock(&sdata->local->iflist_mtx);
1013 list_del_rcu(&sdata->list);
1014 mutex_unlock(&sdata->local->iflist_mtx);
1017 unregister_netdevice(sdata->dev);
1021 * Remove all interfaces, may only be called at hardware unregistration
1022 * time because it doesn't do RCU-safe list removals.
1024 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1026 struct ieee80211_sub_if_data *sdata, *tmp;
1027 LIST_HEAD(unreg_list);
1031 mutex_lock(&local->iflist_mtx);
1032 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1033 list_del(&sdata->list);
1035 unregister_netdevice_queue(sdata->dev, &unreg_list);
1037 mutex_unlock(&local->iflist_mtx);
1038 unregister_netdevice_many(&unreg_list);
1041 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1044 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1047 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1048 printk(KERN_DEBUG "%s: device no longer idle - %s\n",
1049 wiphy_name(local->hw.wiphy), reason);
1052 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1053 return IEEE80211_CONF_CHANGE_IDLE;
1056 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1058 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1061 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1062 printk(KERN_DEBUG "%s: device now idle\n",
1063 wiphy_name(local->hw.wiphy));
1066 drv_flush(local, false);
1068 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1069 return IEEE80211_CONF_CHANGE_IDLE;
1072 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1074 struct ieee80211_sub_if_data *sdata;
1077 if (!list_empty(&local->work_list))
1078 return ieee80211_idle_off(local, "working");
1080 if (local->scanning)
1081 return ieee80211_idle_off(local, "scanning");
1083 list_for_each_entry(sdata, &local->interfaces, list) {
1084 if (!ieee80211_sdata_running(sdata))
1086 /* do not count disabled managed interfaces */
1087 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1088 !sdata->u.mgd.associated)
1090 /* do not count unused IBSS interfaces */
1091 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1092 !sdata->u.ibss.ssid_len)
1094 /* count everything else */
1099 return ieee80211_idle_on(local);
1101 return ieee80211_idle_off(local, "in use");
1106 void ieee80211_recalc_idle(struct ieee80211_local *local)
1110 mutex_lock(&local->iflist_mtx);
1111 chg = __ieee80211_recalc_idle(local);
1112 mutex_unlock(&local->iflist_mtx);
1114 ieee80211_hw_config(local, chg);
1117 static int netdev_notify(struct notifier_block *nb,
1118 unsigned long state,
1121 struct net_device *dev = ndev;
1122 struct ieee80211_sub_if_data *sdata;
1124 if (state != NETDEV_CHANGENAME)
1127 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1130 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1133 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1135 memcpy(sdata->name, dev->name, IFNAMSIZ);
1137 ieee80211_debugfs_rename_netdev(sdata);
1141 static struct notifier_block mac80211_netdev_notifier = {
1142 .notifier_call = netdev_notify,
1145 int ieee80211_iface_init(void)
1147 return register_netdevice_notifier(&mac80211_netdev_notifier);
1150 void ieee80211_iface_exit(void)
1152 unregister_netdevice_notifier(&mac80211_netdev_notifier);