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:
194 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
196 case NL80211_IFTYPE_AP:
197 sdata->bss = &sdata->u.ap;
199 case NL80211_IFTYPE_MESH_POINT:
200 case NL80211_IFTYPE_STATION:
201 case NL80211_IFTYPE_MONITOR:
202 case NL80211_IFTYPE_ADHOC:
203 /* no special treatment */
205 case NL80211_IFTYPE_UNSPECIFIED:
206 case NUM_NL80211_IFTYPES:
207 case NL80211_IFTYPE_P2P_CLIENT:
208 case NL80211_IFTYPE_P2P_GO:
214 if (local->open_count == 0) {
215 res = drv_start(local);
218 if (local->ops->napi_poll)
219 napi_enable(&local->napi);
220 /* we're brought up, everything changes */
221 hw_reconf_flags = ~0;
222 ieee80211_led_radio(local, true);
223 ieee80211_mod_tpt_led_trig(local,
224 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
228 * Copy the hopefully now-present MAC address to
229 * this interface, if it has the special null one.
231 if (is_zero_ether_addr(dev->dev_addr)) {
232 memcpy(dev->dev_addr,
233 local->hw.wiphy->perm_addr,
235 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
237 if (!is_valid_ether_addr(dev->dev_addr)) {
238 if (!local->open_count)
240 return -EADDRNOTAVAIL;
244 switch (sdata->vif.type) {
245 case NL80211_IFTYPE_AP_VLAN:
246 /* no need to tell driver */
248 case NL80211_IFTYPE_MONITOR:
249 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
250 local->cooked_mntrs++;
254 /* must be before the call to ieee80211_configure_filter */
256 if (local->monitors == 1) {
257 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
258 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
261 ieee80211_adjust_monitor_flags(sdata, 1);
262 ieee80211_configure_filter(local);
264 netif_carrier_on(dev);
268 res = drv_add_interface(local, &sdata->vif);
273 if (sdata->vif.type == NL80211_IFTYPE_AP) {
275 local->fif_probe_req++;
277 ieee80211_configure_filter(local);
278 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
279 local->fif_probe_req++;
282 changed |= ieee80211_reset_erp_info(sdata);
283 ieee80211_bss_info_change_notify(sdata, changed);
285 if (sdata->vif.type == NL80211_IFTYPE_STATION)
286 netif_carrier_off(dev);
288 netif_carrier_on(dev);
291 set_bit(SDATA_STATE_RUNNING, &sdata->state);
293 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
294 /* Create STA entry for the WDS peer */
295 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
299 goto err_del_interface;
302 /* no locking required since STA is not live yet */
303 sta->flags |= WLAN_STA_AUTHORIZED;
305 res = sta_info_insert(sta);
307 /* STA has been freed */
308 goto err_del_interface;
311 rate_control_rate_init(sta);
315 * set_multicast_list will be invoked by the networking core
316 * which will check whether any increments here were done in
317 * error and sync them down to the hardware as filter flags.
319 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
320 atomic_inc(&local->iff_allmultis);
322 if (sdata->flags & IEEE80211_SDATA_PROMISC)
323 atomic_inc(&local->iff_promiscs);
325 mutex_lock(&local->mtx);
326 hw_reconf_flags |= __ieee80211_recalc_idle(local);
327 mutex_unlock(&local->mtx);
332 if (hw_reconf_flags) {
333 ieee80211_hw_config(local, hw_reconf_flags);
335 * set default queue parameters so drivers don't
336 * need to initialise the hardware if the hardware
337 * doesn't start up with sane defaults
339 ieee80211_set_wmm_default(sdata);
342 ieee80211_recalc_ps(local, -1);
344 netif_tx_start_all_queues(dev);
348 drv_remove_interface(local, &sdata->vif);
350 if (!local->open_count)
354 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
355 list_del(&sdata->u.vlan.list);
356 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
360 static int ieee80211_open(struct net_device *dev)
362 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
365 /* fail early if user set an invalid address */
366 if (!is_zero_ether_addr(dev->dev_addr) &&
367 !is_valid_ether_addr(dev->dev_addr))
368 return -EADDRNOTAVAIL;
370 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
374 return ieee80211_do_open(dev, true);
377 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
380 struct ieee80211_local *local = sdata->local;
382 struct sk_buff *skb, *tmp;
383 u32 hw_reconf_flags = 0;
386 if (local->scan_sdata == sdata)
387 ieee80211_scan_cancel(local);
389 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
392 * Stop TX on this interface first.
394 netif_tx_stop_all_queues(sdata->dev);
397 * Purge work for this interface.
399 ieee80211_work_purge(sdata);
402 * Remove all stations associated with this interface.
404 * This must be done before calling ops->remove_interface()
405 * because otherwise we can later invoke ops->sta_notify()
406 * whenever the STAs are removed, and that invalidates driver
407 * assumptions about always getting a vif pointer that is valid
408 * (because if we remove a STA after ops->remove_interface()
409 * the driver will have removed the vif info already!)
411 * This is relevant only in AP, WDS and mesh modes, since in
412 * all other modes we've already removed all stations when
415 sta_info_flush(local, sdata);
418 * Don't count this interface for promisc/allmulti while it
419 * is down. dev_mc_unsync() will invoke set_multicast_list
420 * on the master interface which will sync these down to the
421 * hardware as filter flags.
423 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
424 atomic_dec(&local->iff_allmultis);
426 if (sdata->flags & IEEE80211_SDATA_PROMISC)
427 atomic_dec(&local->iff_promiscs);
429 if (sdata->vif.type == NL80211_IFTYPE_AP) {
431 local->fif_probe_req--;
432 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
433 local->fif_probe_req--;
436 netif_addr_lock_bh(sdata->dev);
437 spin_lock_bh(&local->filter_lock);
438 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
439 sdata->dev->addr_len);
440 spin_unlock_bh(&local->filter_lock);
441 netif_addr_unlock_bh(sdata->dev);
443 ieee80211_configure_filter(local);
445 del_timer_sync(&local->dynamic_ps_timer);
446 cancel_work_sync(&local->dynamic_ps_enable_work);
448 /* APs need special treatment */
449 if (sdata->vif.type == NL80211_IFTYPE_AP) {
450 struct ieee80211_sub_if_data *vlan, *tmpsdata;
451 struct beacon_data *old_beacon = sdata->u.ap.beacon;
453 /* sdata_running will return false, so this will disable */
454 ieee80211_bss_info_change_notify(sdata,
455 BSS_CHANGED_BEACON_ENABLED);
458 rcu_assign_pointer(sdata->u.ap.beacon, NULL);
462 /* free all potentially still buffered bcast frames */
463 while ((skb = skb_dequeue(&sdata->u.ap.ps_bc_buf))) {
464 local->total_ps_buffered--;
468 /* down all dependent devices, that is VLANs */
469 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
471 dev_close(vlan->dev);
472 WARN_ON(!list_empty(&sdata->u.ap.vlans));
478 switch (sdata->vif.type) {
479 case NL80211_IFTYPE_AP_VLAN:
480 list_del(&sdata->u.vlan.list);
481 /* no need to tell driver */
483 case NL80211_IFTYPE_MONITOR:
484 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
485 local->cooked_mntrs--;
490 if (local->monitors == 0) {
491 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
492 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
495 ieee80211_adjust_monitor_flags(sdata, -1);
496 ieee80211_configure_filter(local);
499 flush_work(&sdata->work);
501 * When we get here, the interface is marked down.
502 * Call synchronize_rcu() to wait for the RX path
503 * should it be using the interface and enqueuing
504 * frames at this very time on another CPU.
507 skb_queue_purge(&sdata->skb_queue);
510 * Disable beaconing here for mesh only, AP and IBSS
511 * are already taken care of.
513 if (sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
514 ieee80211_bss_info_change_notify(sdata,
515 BSS_CHANGED_BEACON_ENABLED);
518 * Free all remaining keys, there shouldn't be any,
519 * except maybe group keys in AP more or WDS?
521 ieee80211_free_keys(sdata);
524 drv_remove_interface(local, &sdata->vif);
529 mutex_lock(&local->mtx);
530 hw_reconf_flags |= __ieee80211_recalc_idle(local);
531 mutex_unlock(&local->mtx);
533 ieee80211_recalc_ps(local, -1);
535 if (local->open_count == 0) {
536 if (local->ops->napi_poll)
537 napi_disable(&local->napi);
538 ieee80211_clear_tx_pending(local);
539 ieee80211_stop_device(local);
541 /* no reconfiguring after stop! */
545 /* do after stop to avoid reconfiguring when we stop anyway */
547 ieee80211_hw_config(local, hw_reconf_flags);
549 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
550 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
551 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
552 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
553 if (info->control.vif == &sdata->vif) {
554 __skb_unlink(skb, &local->pending[i]);
555 dev_kfree_skb_irq(skb);
559 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
562 static int ieee80211_stop(struct net_device *dev)
564 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
566 ieee80211_do_stop(sdata, true);
571 static void ieee80211_set_multicast_list(struct net_device *dev)
573 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
574 struct ieee80211_local *local = sdata->local;
575 int allmulti, promisc, sdata_allmulti, sdata_promisc;
577 allmulti = !!(dev->flags & IFF_ALLMULTI);
578 promisc = !!(dev->flags & IFF_PROMISC);
579 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
580 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
582 if (allmulti != sdata_allmulti) {
583 if (dev->flags & IFF_ALLMULTI)
584 atomic_inc(&local->iff_allmultis);
586 atomic_dec(&local->iff_allmultis);
587 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
590 if (promisc != sdata_promisc) {
591 if (dev->flags & IFF_PROMISC)
592 atomic_inc(&local->iff_promiscs);
594 atomic_dec(&local->iff_promiscs);
595 sdata->flags ^= IEEE80211_SDATA_PROMISC;
597 spin_lock_bh(&local->filter_lock);
598 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
599 spin_unlock_bh(&local->filter_lock);
600 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
604 * Called when the netdev is removed or, by the code below, before
605 * the interface type changes.
607 static void ieee80211_teardown_sdata(struct net_device *dev)
609 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
610 struct ieee80211_local *local = sdata->local;
614 /* free extra data */
615 ieee80211_free_keys(sdata);
617 ieee80211_debugfs_remove_netdev(sdata);
619 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
620 __skb_queue_purge(&sdata->fragments[i].skb_list);
621 sdata->fragment_next = 0;
623 if (ieee80211_vif_is_mesh(&sdata->vif))
624 mesh_rmc_free(sdata);
626 flushed = sta_info_flush(local, sdata);
630 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
633 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
636 static const struct net_device_ops ieee80211_dataif_ops = {
637 .ndo_open = ieee80211_open,
638 .ndo_stop = ieee80211_stop,
639 .ndo_uninit = ieee80211_teardown_sdata,
640 .ndo_start_xmit = ieee80211_subif_start_xmit,
641 .ndo_set_multicast_list = ieee80211_set_multicast_list,
642 .ndo_change_mtu = ieee80211_change_mtu,
643 .ndo_set_mac_address = ieee80211_change_mac,
644 .ndo_select_queue = ieee80211_netdev_select_queue,
647 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
650 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
651 struct ieee80211_local *local = sdata->local;
652 struct ieee80211_hdr *hdr;
653 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
656 if (local->hw.queues < 4)
660 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
661 return 0; /* doesn't matter, frame will be dropped */
663 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
665 if (!ieee80211_is_data(hdr->frame_control)) {
667 return ieee802_1d_to_ac[skb->priority];
669 if (!ieee80211_is_data_qos(hdr->frame_control)) {
671 return ieee802_1d_to_ac[skb->priority];
674 p = ieee80211_get_qos_ctl(hdr);
675 skb->priority = *p & IEEE80211_QOS_CTL_TAG1D_MASK;
677 return ieee80211_downgrade_queue(local, skb);
680 static const struct net_device_ops ieee80211_monitorif_ops = {
681 .ndo_open = ieee80211_open,
682 .ndo_stop = ieee80211_stop,
683 .ndo_uninit = ieee80211_teardown_sdata,
684 .ndo_start_xmit = ieee80211_monitor_start_xmit,
685 .ndo_set_multicast_list = ieee80211_set_multicast_list,
686 .ndo_change_mtu = ieee80211_change_mtu,
687 .ndo_set_mac_address = eth_mac_addr,
688 .ndo_select_queue = ieee80211_monitor_select_queue,
691 static void ieee80211_if_setup(struct net_device *dev)
694 dev->netdev_ops = &ieee80211_dataif_ops;
695 dev->destructor = free_netdev;
698 static void ieee80211_iface_work(struct work_struct *work)
700 struct ieee80211_sub_if_data *sdata =
701 container_of(work, struct ieee80211_sub_if_data, work);
702 struct ieee80211_local *local = sdata->local;
704 struct sta_info *sta;
705 struct ieee80211_ra_tid *ra_tid;
707 if (!ieee80211_sdata_running(sdata))
714 * ieee80211_queue_work() should have picked up most cases,
715 * here we'll pick the rest.
717 if (WARN(local->suspended,
718 "interface work scheduled while going to suspend\n"))
721 /* first process frames */
722 while ((skb = skb_dequeue(&sdata->skb_queue))) {
723 struct ieee80211_mgmt *mgmt = (void *)skb->data;
725 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
726 ra_tid = (void *)&skb->cb;
727 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
729 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
730 ra_tid = (void *)&skb->cb;
731 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
733 } else if (ieee80211_is_action(mgmt->frame_control) &&
734 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
737 mutex_lock(&local->sta_mtx);
738 sta = sta_info_get_bss(sdata, mgmt->sa);
740 switch (mgmt->u.action.u.addba_req.action_code) {
741 case WLAN_ACTION_ADDBA_REQ:
742 ieee80211_process_addba_request(
743 local, sta, mgmt, len);
745 case WLAN_ACTION_ADDBA_RESP:
746 ieee80211_process_addba_resp(local, sta,
749 case WLAN_ACTION_DELBA:
750 ieee80211_process_delba(sdata, sta,
758 mutex_unlock(&local->sta_mtx);
759 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
760 struct ieee80211_hdr *hdr = (void *)mgmt;
762 * So the frame isn't mgmt, but frame_control
763 * is at the right place anyway, of course, so
764 * the if statement is correct.
766 * Warn if we have other data frame types here,
767 * they must not get here.
769 WARN_ON(hdr->frame_control &
770 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
771 WARN_ON(!(hdr->seq_ctrl &
772 cpu_to_le16(IEEE80211_SCTL_FRAG)));
774 * This was a fragment of a frame, received while
775 * a block-ack session was active. That cannot be
776 * right, so terminate the session.
778 mutex_lock(&local->sta_mtx);
779 sta = sta_info_get_bss(sdata, mgmt->sa);
781 u16 tid = *ieee80211_get_qos_ctl(hdr) &
782 IEEE80211_QOS_CTL_TID_MASK;
784 __ieee80211_stop_rx_ba_session(
785 sta, tid, WLAN_BACK_RECIPIENT,
786 WLAN_REASON_QSTA_REQUIRE_SETUP,
789 mutex_unlock(&local->sta_mtx);
790 } else switch (sdata->vif.type) {
791 case NL80211_IFTYPE_STATION:
792 ieee80211_sta_rx_queued_mgmt(sdata, skb);
794 case NL80211_IFTYPE_ADHOC:
795 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
797 case NL80211_IFTYPE_MESH_POINT:
798 if (!ieee80211_vif_is_mesh(&sdata->vif))
800 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
803 WARN(1, "frame for unexpected interface type");
810 /* then other type-dependent work */
811 switch (sdata->vif.type) {
812 case NL80211_IFTYPE_STATION:
813 ieee80211_sta_work(sdata);
815 case NL80211_IFTYPE_ADHOC:
816 ieee80211_ibss_work(sdata);
818 case NL80211_IFTYPE_MESH_POINT:
819 if (!ieee80211_vif_is_mesh(&sdata->vif))
821 ieee80211_mesh_work(sdata);
830 * Helper function to initialise an interface to a specific type.
832 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
833 enum nl80211_iftype type)
835 /* clear type-dependent union */
836 memset(&sdata->u, 0, sizeof(sdata->u));
838 /* and set some type-dependent values */
839 sdata->vif.type = type;
840 sdata->vif.p2p = false;
841 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
842 sdata->wdev.iftype = type;
844 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
845 sdata->control_port_no_encrypt = false;
847 /* only monitor differs */
848 sdata->dev->type = ARPHRD_ETHER;
850 skb_queue_head_init(&sdata->skb_queue);
851 INIT_WORK(&sdata->work, ieee80211_iface_work);
854 case NL80211_IFTYPE_P2P_GO:
855 type = NL80211_IFTYPE_AP;
856 sdata->vif.type = type;
857 sdata->vif.p2p = true;
859 case NL80211_IFTYPE_AP:
860 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
861 INIT_LIST_HEAD(&sdata->u.ap.vlans);
863 case NL80211_IFTYPE_P2P_CLIENT:
864 type = NL80211_IFTYPE_STATION;
865 sdata->vif.type = type;
866 sdata->vif.p2p = true;
868 case NL80211_IFTYPE_STATION:
869 ieee80211_sta_setup_sdata(sdata);
871 case NL80211_IFTYPE_ADHOC:
872 ieee80211_ibss_setup_sdata(sdata);
874 case NL80211_IFTYPE_MESH_POINT:
875 if (ieee80211_vif_is_mesh(&sdata->vif))
876 ieee80211_mesh_init_sdata(sdata);
878 case NL80211_IFTYPE_MONITOR:
879 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
880 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
881 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
882 MONITOR_FLAG_OTHER_BSS;
884 case NL80211_IFTYPE_WDS:
885 case NL80211_IFTYPE_AP_VLAN:
887 case NL80211_IFTYPE_UNSPECIFIED:
888 case NUM_NL80211_IFTYPES:
893 ieee80211_debugfs_add_netdev(sdata);
896 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
897 enum nl80211_iftype type)
899 struct ieee80211_local *local = sdata->local;
901 enum nl80211_iftype internal_type = type;
906 if (!local->ops->change_interface)
909 switch (sdata->vif.type) {
910 case NL80211_IFTYPE_AP:
911 case NL80211_IFTYPE_STATION:
912 case NL80211_IFTYPE_ADHOC:
914 * Could maybe also all others here?
915 * Just not sure how that interacts
916 * with the RX/config path e.g. for
925 case NL80211_IFTYPE_AP:
926 case NL80211_IFTYPE_STATION:
927 case NL80211_IFTYPE_ADHOC:
929 * Could probably support everything
930 * but WDS here (WDS do_open can fail
931 * under memory pressure, which this
932 * code isn't prepared to handle).
935 case NL80211_IFTYPE_P2P_CLIENT:
937 internal_type = NL80211_IFTYPE_STATION;
939 case NL80211_IFTYPE_P2P_GO:
941 internal_type = NL80211_IFTYPE_AP;
947 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
951 ieee80211_do_stop(sdata, false);
953 ieee80211_teardown_sdata(sdata->dev);
955 ret = drv_change_interface(local, sdata, internal_type, p2p);
957 type = sdata->vif.type;
959 ieee80211_setup_sdata(sdata, type);
961 err = ieee80211_do_open(sdata->dev, false);
962 WARN(err, "type change: do_open returned %d", err);
967 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
968 enum nl80211_iftype type)
974 if (type == ieee80211_vif_type_p2p(&sdata->vif))
977 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
978 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
979 type == NL80211_IFTYPE_ADHOC)
982 if (ieee80211_sdata_running(sdata)) {
983 ret = ieee80211_runtime_change_iftype(sdata, type);
987 /* Purge and reset type-dependent state. */
988 ieee80211_teardown_sdata(sdata->dev);
989 ieee80211_setup_sdata(sdata, type);
992 /* reset some values that shouldn't be kept across type changes */
993 sdata->vif.bss_conf.basic_rates =
994 ieee80211_mandatory_rates(sdata->local,
995 sdata->local->hw.conf.channel->band);
996 sdata->drop_unencrypted = 0;
997 if (type == NL80211_IFTYPE_STATION)
998 sdata->u.mgd.use_4addr = false;
1003 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1004 struct net_device *dev,
1005 enum nl80211_iftype type)
1007 struct ieee80211_sub_if_data *sdata;
1008 u64 mask, start, addr, val, inc;
1010 u8 tmp_addr[ETH_ALEN];
1013 /* default ... something at least */
1014 memcpy(dev->perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1016 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1017 local->hw.wiphy->n_addresses <= 1)
1021 mutex_lock(&local->iflist_mtx);
1024 case NL80211_IFTYPE_MONITOR:
1025 /* doesn't matter */
1027 case NL80211_IFTYPE_WDS:
1028 case NL80211_IFTYPE_AP_VLAN:
1029 /* match up with an AP interface */
1030 list_for_each_entry(sdata, &local->interfaces, list) {
1031 if (sdata->vif.type != NL80211_IFTYPE_AP)
1033 memcpy(dev->perm_addr, sdata->vif.addr, ETH_ALEN);
1036 /* keep default if no AP interface present */
1039 /* assign a new address if possible -- try n_addresses first */
1040 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1043 list_for_each_entry(sdata, &local->interfaces, list) {
1044 if (memcmp(local->hw.wiphy->addresses[i].addr,
1045 sdata->vif.addr, ETH_ALEN) == 0) {
1052 memcpy(dev->perm_addr,
1053 local->hw.wiphy->addresses[i].addr,
1059 /* try mask if available */
1060 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1063 m = local->hw.wiphy->addr_mask;
1064 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1065 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1066 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1068 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1069 /* not a contiguous mask ... not handled now! */
1070 printk(KERN_DEBUG "not contiguous\n");
1074 m = local->hw.wiphy->perm_addr;
1075 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1076 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1077 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1079 inc = 1ULL<<__ffs64(mask);
1080 val = (start & mask);
1081 addr = (start & ~mask) | (val & mask);
1085 tmp_addr[5] = addr >> 0*8;
1086 tmp_addr[4] = addr >> 1*8;
1087 tmp_addr[3] = addr >> 2*8;
1088 tmp_addr[2] = addr >> 3*8;
1089 tmp_addr[1] = addr >> 4*8;
1090 tmp_addr[0] = addr >> 5*8;
1094 list_for_each_entry(sdata, &local->interfaces, list) {
1095 if (memcmp(tmp_addr, sdata->vif.addr,
1103 memcpy(dev->perm_addr, tmp_addr, ETH_ALEN);
1106 addr = (start & ~mask) | (val & mask);
1107 } while (addr != start);
1112 mutex_unlock(&local->iflist_mtx);
1115 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1116 struct net_device **new_dev, enum nl80211_iftype type,
1117 struct vif_params *params)
1119 struct net_device *ndev;
1120 struct ieee80211_sub_if_data *sdata = NULL;
1125 ndev = alloc_netdev_mq(sizeof(*sdata) + local->hw.vif_data_size,
1126 name, ieee80211_if_setup, local->hw.queues);
1129 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1131 ndev->needed_headroom = local->tx_headroom +
1132 4*6 /* four MAC addresses */
1133 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1135 + 8 /* rfc1042/bridge tunnel */
1136 - ETH_HLEN /* ethernet hard_header_len */
1137 + IEEE80211_ENCRYPT_HEADROOM;
1138 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1140 ret = dev_alloc_name(ndev, ndev->name);
1144 ieee80211_assign_perm_addr(local, ndev, type);
1145 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1146 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1148 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
1149 sdata = netdev_priv(ndev);
1150 ndev->ieee80211_ptr = &sdata->wdev;
1151 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1152 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1154 /* initialise type-independent data */
1155 sdata->wdev.wiphy = local->hw.wiphy;
1156 sdata->local = local;
1159 sdata->arp_filter_state = true;
1162 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1163 skb_queue_head_init(&sdata->fragments[i].skb_list);
1165 INIT_LIST_HEAD(&sdata->key_list);
1167 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1168 struct ieee80211_supported_band *sband;
1169 sband = local->hw.wiphy->bands[i];
1170 sdata->rc_rateidx_mask[i] =
1171 sband ? (1 << sband->n_bitrates) - 1 : 0;
1174 /* setup type-dependent data */
1175 ieee80211_setup_sdata(sdata, type);
1178 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1179 if (type == NL80211_IFTYPE_STATION)
1180 sdata->u.mgd.use_4addr = params->use_4addr;
1183 ret = register_netdevice(ndev);
1187 mutex_lock(&local->iflist_mtx);
1188 list_add_tail_rcu(&sdata->list, &local->interfaces);
1189 mutex_unlock(&local->iflist_mtx);
1201 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1205 mutex_lock(&sdata->local->iflist_mtx);
1206 list_del_rcu(&sdata->list);
1207 mutex_unlock(&sdata->local->iflist_mtx);
1210 unregister_netdevice(sdata->dev);
1214 * Remove all interfaces, may only be called at hardware unregistration
1215 * time because it doesn't do RCU-safe list removals.
1217 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1219 struct ieee80211_sub_if_data *sdata, *tmp;
1220 LIST_HEAD(unreg_list);
1224 mutex_lock(&local->iflist_mtx);
1225 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1226 list_del(&sdata->list);
1228 unregister_netdevice_queue(sdata->dev, &unreg_list);
1230 mutex_unlock(&local->iflist_mtx);
1231 unregister_netdevice_many(&unreg_list);
1234 static u32 ieee80211_idle_off(struct ieee80211_local *local,
1237 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
1240 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1241 wiphy_debug(local->hw.wiphy, "device no longer idle - %s\n", reason);
1244 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
1245 return IEEE80211_CONF_CHANGE_IDLE;
1248 static u32 ieee80211_idle_on(struct ieee80211_local *local)
1250 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
1253 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1254 wiphy_debug(local->hw.wiphy, "device now idle\n");
1257 drv_flush(local, false);
1259 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
1260 return IEEE80211_CONF_CHANGE_IDLE;
1263 u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
1265 struct ieee80211_sub_if_data *sdata;
1267 bool working = false, scanning = false, hw_roc = false;
1268 struct ieee80211_work *wk;
1269 unsigned int led_trig_start = 0, led_trig_stop = 0;
1271 #ifdef CONFIG_PROVE_LOCKING
1272 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
1273 !lockdep_is_held(&local->iflist_mtx));
1275 lockdep_assert_held(&local->mtx);
1277 list_for_each_entry(sdata, &local->interfaces, list) {
1278 if (!ieee80211_sdata_running(sdata)) {
1279 sdata->vif.bss_conf.idle = true;
1283 sdata->old_idle = sdata->vif.bss_conf.idle;
1285 /* do not count disabled managed interfaces */
1286 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
1287 !sdata->u.mgd.associated) {
1288 sdata->vif.bss_conf.idle = true;
1291 /* do not count unused IBSS interfaces */
1292 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
1293 !sdata->u.ibss.ssid_len) {
1294 sdata->vif.bss_conf.idle = true;
1297 /* count everything else */
1301 list_for_each_entry(wk, &local->work_list, list) {
1303 wk->sdata->vif.bss_conf.idle = false;
1306 if (local->scan_sdata) {
1308 local->scan_sdata->vif.bss_conf.idle = false;
1311 if (local->hw_roc_channel)
1314 list_for_each_entry(sdata, &local->interfaces, list) {
1315 if (sdata->old_idle == sdata->vif.bss_conf.idle)
1317 if (!ieee80211_sdata_running(sdata))
1319 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
1322 if (working || scanning || hw_roc)
1323 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1325 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
1328 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1330 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
1332 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
1335 return ieee80211_idle_off(local, "hw remain-on-channel");
1337 return ieee80211_idle_off(local, "working");
1339 return ieee80211_idle_off(local, "scanning");
1341 return ieee80211_idle_on(local);
1343 return ieee80211_idle_off(local, "in use");
1348 void ieee80211_recalc_idle(struct ieee80211_local *local)
1352 mutex_lock(&local->iflist_mtx);
1353 chg = __ieee80211_recalc_idle(local);
1354 mutex_unlock(&local->iflist_mtx);
1356 ieee80211_hw_config(local, chg);
1359 static int netdev_notify(struct notifier_block *nb,
1360 unsigned long state,
1363 struct net_device *dev = ndev;
1364 struct ieee80211_sub_if_data *sdata;
1366 if (state != NETDEV_CHANGENAME)
1369 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1372 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1375 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1377 memcpy(sdata->name, dev->name, IFNAMSIZ);
1379 ieee80211_debugfs_rename_netdev(sdata);
1383 static struct notifier_block mac80211_netdev_notifier = {
1384 .notifier_call = netdev_notify,
1387 int ieee80211_iface_init(void)
1389 return register_netdevice_notifier(&mac80211_netdev_notifier);
1392 void ieee80211_iface_exit(void)
1394 unregister_netdevice_notifier(&mac80211_netdev_notifier);