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.
45 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
47 struct ieee80211_chanctx_conf *chanctx_conf;
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
57 power = chanctx_conf->def.chan->max_power;
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
75 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
81 static u32 ieee80211_idle_off(struct ieee80211_local *local)
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
90 static u32 ieee80211_idle_on(struct ieee80211_local *local)
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
95 drv_flush(local, false);
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
101 void ieee80211_recalc_idle(struct ieee80211_local *local)
103 bool working = false, scanning, active;
104 unsigned int led_trig_start = 0, led_trig_stop = 0;
105 struct ieee80211_roc_work *roc;
108 lockdep_assert_held(&local->mtx);
110 active = !list_empty(&local->chanctx_list);
112 if (!local->ops->remain_on_channel) {
113 list_for_each_entry(roc, &local->roc_list, list) {
119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134 if (working || scanning || active)
135 change = ieee80211_idle_off(local);
137 change = ieee80211_idle_on(local);
139 ieee80211_hw_config(local, change);
142 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
144 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
151 static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
153 struct ieee80211_sub_if_data *sdata;
158 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
162 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
163 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
164 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
166 m = local->hw.wiphy->addr_mask;
167 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
172 mutex_lock(&local->iflist_mtx);
173 list_for_each_entry(sdata, &local->interfaces, list) {
174 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
178 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
182 if ((new & ~mask) != (tmp & ~mask)) {
187 mutex_unlock(&local->iflist_mtx);
192 static int ieee80211_change_mac(struct net_device *dev, void *addr)
194 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
195 struct sockaddr *sa = addr;
198 if (ieee80211_sdata_running(sdata))
201 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
205 ret = eth_mac_addr(dev, sa);
208 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
213 static inline int identical_mac_addr_allowed(int type1, int type2)
215 return type1 == NL80211_IFTYPE_MONITOR ||
216 type2 == NL80211_IFTYPE_MONITOR ||
217 type1 == NL80211_IFTYPE_P2P_DEVICE ||
218 type2 == NL80211_IFTYPE_P2P_DEVICE ||
219 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
220 (type1 == NL80211_IFTYPE_WDS &&
221 (type2 == NL80211_IFTYPE_WDS ||
222 type2 == NL80211_IFTYPE_AP)) ||
223 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
224 (type1 == NL80211_IFTYPE_AP_VLAN &&
225 (type2 == NL80211_IFTYPE_AP ||
226 type2 == NL80211_IFTYPE_AP_VLAN));
229 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
230 enum nl80211_iftype iftype)
232 struct ieee80211_local *local = sdata->local;
233 struct ieee80211_sub_if_data *nsdata;
237 /* we hold the RTNL here so can safely walk the list */
238 list_for_each_entry(nsdata, &local->interfaces, list) {
239 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
241 * Allow only a single IBSS interface to be up at any
242 * time. This is restricted because beacon distribution
243 * cannot work properly if both are in the same IBSS.
245 * To remove this restriction we'd have to disallow them
246 * from setting the same SSID on different IBSS interfaces
247 * belonging to the same hardware. Then, however, we're
248 * faced with having to adopt two different TSF timers...
250 if (iftype == NL80211_IFTYPE_ADHOC &&
251 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
255 * The remaining checks are only performed for interfaces
256 * with the same MAC address.
258 if (!ether_addr_equal(sdata->vif.addr,
263 * check whether it may have the same address
265 if (!identical_mac_addr_allowed(iftype,
270 * can only add VLANs to enabled APs
272 if (iftype == NL80211_IFTYPE_AP_VLAN &&
273 nsdata->vif.type == NL80211_IFTYPE_AP)
274 sdata->bss = &nsdata->u.ap;
281 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
283 int n_queues = sdata->local->hw.queues;
286 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
287 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
288 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
289 IEEE80211_INVAL_HW_QUEUE))
291 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
297 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
298 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
299 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
300 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
304 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
307 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
313 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
316 struct ieee80211_local *local = sdata->local;
317 u32 flags = sdata->u.mntr_flags;
319 #define ADJUST(_f, _s) do { \
320 if (flags & MONITOR_FLAG_##_f) \
321 local->fif_##_s += offset; \
324 ADJUST(FCSFAIL, fcsfail);
325 ADJUST(PLCPFAIL, plcpfail);
326 ADJUST(CONTROL, control);
327 ADJUST(CONTROL, pspoll);
328 ADJUST(OTHER_BSS, other_bss);
333 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
335 struct ieee80211_local *local = sdata->local;
338 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
339 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
340 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
341 else if (local->hw.queues >= IEEE80211_NUM_ACS)
342 sdata->vif.hw_queue[i] = i;
344 sdata->vif.hw_queue[i] = 0;
346 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
349 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
351 struct ieee80211_sub_if_data *sdata;
354 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
357 mutex_lock(&local->iflist_mtx);
359 if (local->monitor_sdata)
362 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
369 sdata->local = local;
370 sdata->vif.type = NL80211_IFTYPE_MONITOR;
371 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
372 wiphy_name(local->hw.wiphy));
374 ieee80211_set_default_queues(sdata);
376 ret = drv_add_interface(local, sdata);
378 /* ok .. stupid driver, it asked for this! */
383 ret = ieee80211_check_queues(sdata);
389 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
390 IEEE80211_CHANCTX_EXCLUSIVE);
392 drv_remove_interface(local, sdata);
397 rcu_assign_pointer(local->monitor_sdata, sdata);
399 mutex_unlock(&local->iflist_mtx);
403 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
405 struct ieee80211_sub_if_data *sdata;
407 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
410 mutex_lock(&local->iflist_mtx);
412 sdata = rcu_dereference_protected(local->monitor_sdata,
413 lockdep_is_held(&local->iflist_mtx));
417 rcu_assign_pointer(local->monitor_sdata, NULL);
420 ieee80211_vif_release_channel(sdata);
422 drv_remove_interface(local, sdata);
426 mutex_unlock(&local->iflist_mtx);
430 * NOTE: Be very careful when changing this function, it must NOT return
431 * an error on interface type changes that have been pre-checked, so most
432 * checks should be in ieee80211_check_concurrent_iface.
434 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
436 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
437 struct net_device *dev = wdev->netdev;
438 struct ieee80211_local *local = sdata->local;
439 struct sta_info *sta;
442 u32 hw_reconf_flags = 0;
444 switch (sdata->vif.type) {
445 case NL80211_IFTYPE_WDS:
446 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
449 case NL80211_IFTYPE_AP_VLAN: {
450 struct ieee80211_sub_if_data *master;
455 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
457 master = container_of(sdata->bss,
458 struct ieee80211_sub_if_data, u.ap);
459 sdata->control_port_protocol =
460 master->control_port_protocol;
461 sdata->control_port_no_encrypt =
462 master->control_port_no_encrypt;
465 case NL80211_IFTYPE_AP:
466 sdata->bss = &sdata->u.ap;
468 case NL80211_IFTYPE_MESH_POINT:
469 case NL80211_IFTYPE_STATION:
470 case NL80211_IFTYPE_MONITOR:
471 case NL80211_IFTYPE_ADHOC:
472 case NL80211_IFTYPE_P2P_DEVICE:
473 /* no special treatment */
475 case NL80211_IFTYPE_UNSPECIFIED:
476 case NUM_NL80211_IFTYPES:
477 case NL80211_IFTYPE_P2P_CLIENT:
478 case NL80211_IFTYPE_P2P_GO:
484 if (local->open_count == 0) {
485 res = drv_start(local);
488 if (local->ops->napi_poll)
489 napi_enable(&local->napi);
490 /* we're brought up, everything changes */
491 hw_reconf_flags = ~0;
492 ieee80211_led_radio(local, true);
493 ieee80211_mod_tpt_led_trig(local,
494 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
498 * Copy the hopefully now-present MAC address to
499 * this interface, if it has the special null one.
501 if (dev && is_zero_ether_addr(dev->dev_addr)) {
502 memcpy(dev->dev_addr,
503 local->hw.wiphy->perm_addr,
505 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
507 if (!is_valid_ether_addr(dev->dev_addr)) {
508 res = -EADDRNOTAVAIL;
513 switch (sdata->vif.type) {
514 case NL80211_IFTYPE_AP_VLAN:
515 /* no need to tell driver, but set carrier and chanctx */
516 if (rtnl_dereference(sdata->bss->beacon)) {
517 ieee80211_vif_vlan_copy_chanctx(sdata);
518 netif_carrier_on(dev);
520 netif_carrier_off(dev);
523 case NL80211_IFTYPE_MONITOR:
524 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
525 local->cooked_mntrs++;
529 if (local->monitors == 0 && local->open_count == 0) {
530 res = ieee80211_add_virtual_monitor(local);
535 /* must be before the call to ieee80211_configure_filter */
537 if (local->monitors == 1) {
538 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
539 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
542 ieee80211_adjust_monitor_flags(sdata, 1);
543 ieee80211_configure_filter(local);
545 netif_carrier_on(dev);
549 ieee80211_del_virtual_monitor(local);
551 res = drv_add_interface(local, sdata);
554 res = ieee80211_check_queues(sdata);
556 goto err_del_interface;
559 drv_add_interface_debugfs(local, sdata);
561 if (sdata->vif.type == NL80211_IFTYPE_AP) {
563 local->fif_probe_req++;
565 ieee80211_configure_filter(local);
566 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
567 local->fif_probe_req++;
570 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
571 changed |= ieee80211_reset_erp_info(sdata);
572 ieee80211_bss_info_change_notify(sdata, changed);
574 switch (sdata->vif.type) {
575 case NL80211_IFTYPE_STATION:
576 case NL80211_IFTYPE_ADHOC:
577 case NL80211_IFTYPE_AP:
578 case NL80211_IFTYPE_MESH_POINT:
579 netif_carrier_off(dev);
581 case NL80211_IFTYPE_WDS:
582 case NL80211_IFTYPE_P2P_DEVICE:
585 netif_carrier_on(dev);
589 * set default queue parameters so drivers don't
590 * need to initialise the hardware if the hardware
591 * doesn't start up with sane defaults
593 ieee80211_set_wmm_default(sdata, true);
596 set_bit(SDATA_STATE_RUNNING, &sdata->state);
598 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
599 /* Create STA entry for the WDS peer */
600 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
604 goto err_del_interface;
607 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
608 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
609 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
611 res = sta_info_insert(sta);
613 /* STA has been freed */
614 goto err_del_interface;
617 rate_control_rate_init(sta);
618 netif_carrier_on(dev);
619 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
620 rcu_assign_pointer(local->p2p_sdata, sdata);
624 * set_multicast_list will be invoked by the networking core
625 * which will check whether any increments here were done in
626 * error and sync them down to the hardware as filter flags.
628 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
629 atomic_inc(&local->iff_allmultis);
631 if (sdata->flags & IEEE80211_SDATA_PROMISC)
632 atomic_inc(&local->iff_promiscs);
638 ieee80211_hw_config(local, hw_reconf_flags);
640 ieee80211_recalc_ps(local, -1);
643 netif_tx_start_all_queues(dev);
647 drv_remove_interface(local, sdata);
649 if (!local->open_count)
653 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
654 list_del(&sdata->u.vlan.list);
655 /* might already be clear but that doesn't matter */
656 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
660 static int ieee80211_open(struct net_device *dev)
662 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
665 /* fail early if user set an invalid address */
666 if (!is_valid_ether_addr(dev->dev_addr))
667 return -EADDRNOTAVAIL;
669 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
673 return ieee80211_do_open(&sdata->wdev, true);
676 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
679 struct ieee80211_local *local = sdata->local;
681 struct sk_buff *skb, *tmp;
682 u32 hw_reconf_flags = 0;
686 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
688 if (rcu_access_pointer(local->scan_sdata) == sdata)
689 ieee80211_scan_cancel(local);
692 * Stop TX on this interface first.
695 netif_tx_stop_all_queues(sdata->dev);
697 ieee80211_roc_purge(sdata);
699 if (sdata->vif.type == NL80211_IFTYPE_STATION)
700 ieee80211_mgd_stop(sdata);
703 * Remove all stations associated with this interface.
705 * This must be done before calling ops->remove_interface()
706 * because otherwise we can later invoke ops->sta_notify()
707 * whenever the STAs are removed, and that invalidates driver
708 * assumptions about always getting a vif pointer that is valid
709 * (because if we remove a STA after ops->remove_interface()
710 * the driver will have removed the vif info already!)
712 * This is relevant only in WDS mode, in all other modes we've
713 * already removed all stations when disconnecting or similar,
716 * We call sta_info_flush_cleanup() later, to combine RCU waits.
718 flushed = sta_info_flush_defer(sdata);
719 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
720 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
723 * Don't count this interface for promisc/allmulti while it
724 * is down. dev_mc_unsync() will invoke set_multicast_list
725 * on the master interface which will sync these down to the
726 * hardware as filter flags.
728 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
729 atomic_dec(&local->iff_allmultis);
731 if (sdata->flags & IEEE80211_SDATA_PROMISC)
732 atomic_dec(&local->iff_promiscs);
734 if (sdata->vif.type == NL80211_IFTYPE_AP) {
736 local->fif_probe_req--;
737 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
738 local->fif_probe_req--;
742 netif_addr_lock_bh(sdata->dev);
743 spin_lock_bh(&local->filter_lock);
744 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
745 sdata->dev->addr_len);
746 spin_unlock_bh(&local->filter_lock);
747 netif_addr_unlock_bh(sdata->dev);
749 ieee80211_configure_filter(local);
752 del_timer_sync(&local->dynamic_ps_timer);
753 cancel_work_sync(&local->dynamic_ps_enable_work);
755 cancel_work_sync(&sdata->recalc_smps);
757 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
759 if (sdata->wdev.cac_started) {
760 mutex_lock(&local->iflist_mtx);
761 ieee80211_vif_release_channel(sdata);
762 mutex_unlock(&local->iflist_mtx);
763 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
767 /* APs need special treatment */
768 if (sdata->vif.type == NL80211_IFTYPE_AP) {
769 struct ieee80211_sub_if_data *vlan, *tmpsdata;
771 /* down all dependent devices, that is VLANs */
772 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
774 dev_close(vlan->dev);
775 WARN_ON(!list_empty(&sdata->u.ap.vlans));
776 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
777 /* remove all packets in parent bc_buf pointing to this dev */
778 ps = &sdata->bss->ps;
780 spin_lock_irqsave(&ps->bc_buf.lock, flags);
781 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
782 if (skb->dev == sdata->dev) {
783 __skb_unlink(skb, &ps->bc_buf);
784 local->total_ps_buffered--;
785 ieee80211_free_txskb(&local->hw, skb);
788 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
794 switch (sdata->vif.type) {
795 case NL80211_IFTYPE_AP_VLAN:
796 list_del(&sdata->u.vlan.list);
797 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
798 /* no need to tell driver */
800 case NL80211_IFTYPE_MONITOR:
801 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
802 local->cooked_mntrs--;
807 if (local->monitors == 0) {
808 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
809 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
810 ieee80211_del_virtual_monitor(local);
813 ieee80211_adjust_monitor_flags(sdata, -1);
814 ieee80211_configure_filter(local);
816 case NL80211_IFTYPE_P2P_DEVICE:
817 /* relies on synchronize_rcu() below */
818 rcu_assign_pointer(local->p2p_sdata, NULL);
821 cancel_work_sync(&sdata->work);
823 * When we get here, the interface is marked down.
825 * sta_info_flush_cleanup() requires rcu_barrier()
826 * first to wait for the station call_rcu() calls
827 * to complete, here we need at least sychronize_rcu()
828 * it to wait for the RX path in case it is using the
829 * interface and enqueuing frames at this very time on
833 sta_info_flush_cleanup(sdata);
835 skb_queue_purge(&sdata->skb_queue);
838 * Free all remaining keys, there shouldn't be any,
839 * except maybe group keys in AP more or WDS?
841 ieee80211_free_keys(sdata);
843 drv_remove_interface_debugfs(local, sdata);
846 drv_remove_interface(local, sdata);
851 ieee80211_recalc_ps(local, -1);
853 if (local->open_count == 0) {
854 if (local->ops->napi_poll)
855 napi_disable(&local->napi);
856 ieee80211_clear_tx_pending(local);
857 ieee80211_stop_device(local);
859 /* no reconfiguring after stop! */
863 /* do after stop to avoid reconfiguring when we stop anyway */
865 ieee80211_hw_config(local, hw_reconf_flags);
867 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
868 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
869 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
870 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
871 if (info->control.vif == &sdata->vif) {
872 __skb_unlink(skb, &local->pending[i]);
873 ieee80211_free_txskb(&local->hw, skb);
877 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
879 if (local->monitors == local->open_count && local->monitors > 0)
880 ieee80211_add_virtual_monitor(local);
883 static int ieee80211_stop(struct net_device *dev)
885 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
887 ieee80211_do_stop(sdata, true);
892 static void ieee80211_set_multicast_list(struct net_device *dev)
894 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
895 struct ieee80211_local *local = sdata->local;
896 int allmulti, promisc, sdata_allmulti, sdata_promisc;
898 allmulti = !!(dev->flags & IFF_ALLMULTI);
899 promisc = !!(dev->flags & IFF_PROMISC);
900 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
901 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
903 if (allmulti != sdata_allmulti) {
904 if (dev->flags & IFF_ALLMULTI)
905 atomic_inc(&local->iff_allmultis);
907 atomic_dec(&local->iff_allmultis);
908 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
911 if (promisc != sdata_promisc) {
912 if (dev->flags & IFF_PROMISC)
913 atomic_inc(&local->iff_promiscs);
915 atomic_dec(&local->iff_promiscs);
916 sdata->flags ^= IEEE80211_SDATA_PROMISC;
918 spin_lock_bh(&local->filter_lock);
919 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
920 spin_unlock_bh(&local->filter_lock);
921 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
925 * Called when the netdev is removed or, by the code below, before
926 * the interface type changes.
928 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
933 /* free extra data */
934 ieee80211_free_keys(sdata);
936 ieee80211_debugfs_remove_netdev(sdata);
938 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
939 __skb_queue_purge(&sdata->fragments[i].skb_list);
940 sdata->fragment_next = 0;
942 if (ieee80211_vif_is_mesh(&sdata->vif))
943 mesh_rmc_free(sdata);
945 flushed = sta_info_flush(sdata);
949 static void ieee80211_uninit(struct net_device *dev)
951 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
954 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
957 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
960 static const struct net_device_ops ieee80211_dataif_ops = {
961 .ndo_open = ieee80211_open,
962 .ndo_stop = ieee80211_stop,
963 .ndo_uninit = ieee80211_uninit,
964 .ndo_start_xmit = ieee80211_subif_start_xmit,
965 .ndo_set_rx_mode = ieee80211_set_multicast_list,
966 .ndo_change_mtu = ieee80211_change_mtu,
967 .ndo_set_mac_address = ieee80211_change_mac,
968 .ndo_select_queue = ieee80211_netdev_select_queue,
971 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
974 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
975 struct ieee80211_local *local = sdata->local;
976 struct ieee80211_hdr *hdr;
977 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
979 if (local->hw.queues < IEEE80211_NUM_ACS)
983 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
984 return 0; /* doesn't matter, frame will be dropped */
986 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
988 return ieee80211_select_queue_80211(sdata, skb, hdr);
991 static const struct net_device_ops ieee80211_monitorif_ops = {
992 .ndo_open = ieee80211_open,
993 .ndo_stop = ieee80211_stop,
994 .ndo_uninit = ieee80211_uninit,
995 .ndo_start_xmit = ieee80211_monitor_start_xmit,
996 .ndo_set_rx_mode = ieee80211_set_multicast_list,
997 .ndo_change_mtu = ieee80211_change_mtu,
998 .ndo_set_mac_address = eth_mac_addr,
999 .ndo_select_queue = ieee80211_monitor_select_queue,
1002 static void ieee80211_if_setup(struct net_device *dev)
1005 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1006 dev->netdev_ops = &ieee80211_dataif_ops;
1007 dev->destructor = free_netdev;
1010 static void ieee80211_iface_work(struct work_struct *work)
1012 struct ieee80211_sub_if_data *sdata =
1013 container_of(work, struct ieee80211_sub_if_data, work);
1014 struct ieee80211_local *local = sdata->local;
1015 struct sk_buff *skb;
1016 struct sta_info *sta;
1017 struct ieee80211_ra_tid *ra_tid;
1019 if (!ieee80211_sdata_running(sdata))
1022 if (local->scanning)
1026 * ieee80211_queue_work() should have picked up most cases,
1027 * here we'll pick the rest.
1029 if (WARN(local->suspended,
1030 "interface work scheduled while going to suspend\n"))
1033 /* first process frames */
1034 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1035 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1037 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1038 ra_tid = (void *)&skb->cb;
1039 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1041 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1042 ra_tid = (void *)&skb->cb;
1043 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1045 } else if (ieee80211_is_action(mgmt->frame_control) &&
1046 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1049 mutex_lock(&local->sta_mtx);
1050 sta = sta_info_get_bss(sdata, mgmt->sa);
1052 switch (mgmt->u.action.u.addba_req.action_code) {
1053 case WLAN_ACTION_ADDBA_REQ:
1054 ieee80211_process_addba_request(
1055 local, sta, mgmt, len);
1057 case WLAN_ACTION_ADDBA_RESP:
1058 ieee80211_process_addba_resp(local, sta,
1061 case WLAN_ACTION_DELBA:
1062 ieee80211_process_delba(sdata, sta,
1070 mutex_unlock(&local->sta_mtx);
1071 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1072 struct ieee80211_hdr *hdr = (void *)mgmt;
1074 * So the frame isn't mgmt, but frame_control
1075 * is at the right place anyway, of course, so
1076 * the if statement is correct.
1078 * Warn if we have other data frame types here,
1079 * they must not get here.
1081 WARN_ON(hdr->frame_control &
1082 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1083 WARN_ON(!(hdr->seq_ctrl &
1084 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1086 * This was a fragment of a frame, received while
1087 * a block-ack session was active. That cannot be
1088 * right, so terminate the session.
1090 mutex_lock(&local->sta_mtx);
1091 sta = sta_info_get_bss(sdata, mgmt->sa);
1093 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1094 IEEE80211_QOS_CTL_TID_MASK;
1096 __ieee80211_stop_rx_ba_session(
1097 sta, tid, WLAN_BACK_RECIPIENT,
1098 WLAN_REASON_QSTA_REQUIRE_SETUP,
1101 mutex_unlock(&local->sta_mtx);
1102 } else switch (sdata->vif.type) {
1103 case NL80211_IFTYPE_STATION:
1104 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1106 case NL80211_IFTYPE_ADHOC:
1107 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1109 case NL80211_IFTYPE_MESH_POINT:
1110 if (!ieee80211_vif_is_mesh(&sdata->vif))
1112 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1115 WARN(1, "frame for unexpected interface type");
1122 /* then other type-dependent work */
1123 switch (sdata->vif.type) {
1124 case NL80211_IFTYPE_STATION:
1125 ieee80211_sta_work(sdata);
1127 case NL80211_IFTYPE_ADHOC:
1128 ieee80211_ibss_work(sdata);
1130 case NL80211_IFTYPE_MESH_POINT:
1131 if (!ieee80211_vif_is_mesh(&sdata->vif))
1133 ieee80211_mesh_work(sdata);
1140 static void ieee80211_recalc_smps_work(struct work_struct *work)
1142 struct ieee80211_sub_if_data *sdata =
1143 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1145 ieee80211_recalc_smps(sdata);
1149 * Helper function to initialise an interface to a specific type.
1151 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1152 enum nl80211_iftype type)
1154 /* clear type-dependent union */
1155 memset(&sdata->u, 0, sizeof(sdata->u));
1157 /* and set some type-dependent values */
1158 sdata->vif.type = type;
1159 sdata->vif.p2p = false;
1160 sdata->wdev.iftype = type;
1162 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1163 sdata->control_port_no_encrypt = false;
1165 sdata->noack_map = 0;
1167 /* only monitor/p2p-device differ */
1169 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1170 sdata->dev->type = ARPHRD_ETHER;
1173 skb_queue_head_init(&sdata->skb_queue);
1174 INIT_WORK(&sdata->work, ieee80211_iface_work);
1175 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1178 case NL80211_IFTYPE_P2P_GO:
1179 type = NL80211_IFTYPE_AP;
1180 sdata->vif.type = type;
1181 sdata->vif.p2p = true;
1183 case NL80211_IFTYPE_AP:
1184 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1185 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1186 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1188 case NL80211_IFTYPE_P2P_CLIENT:
1189 type = NL80211_IFTYPE_STATION;
1190 sdata->vif.type = type;
1191 sdata->vif.p2p = true;
1193 case NL80211_IFTYPE_STATION:
1194 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1195 ieee80211_sta_setup_sdata(sdata);
1197 case NL80211_IFTYPE_ADHOC:
1198 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1199 ieee80211_ibss_setup_sdata(sdata);
1201 case NL80211_IFTYPE_MESH_POINT:
1202 if (ieee80211_vif_is_mesh(&sdata->vif))
1203 ieee80211_mesh_init_sdata(sdata);
1205 case NL80211_IFTYPE_MONITOR:
1206 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1207 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1208 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1209 MONITOR_FLAG_OTHER_BSS;
1211 case NL80211_IFTYPE_WDS:
1212 sdata->vif.bss_conf.bssid = NULL;
1214 case NL80211_IFTYPE_AP_VLAN:
1216 case NL80211_IFTYPE_P2P_DEVICE:
1217 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1219 case NL80211_IFTYPE_UNSPECIFIED:
1220 case NUM_NL80211_IFTYPES:
1225 ieee80211_debugfs_add_netdev(sdata);
1228 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1229 enum nl80211_iftype type)
1231 struct ieee80211_local *local = sdata->local;
1233 enum nl80211_iftype internal_type = type;
1238 if (!local->ops->change_interface)
1241 switch (sdata->vif.type) {
1242 case NL80211_IFTYPE_AP:
1243 case NL80211_IFTYPE_STATION:
1244 case NL80211_IFTYPE_ADHOC:
1246 * Could maybe also all others here?
1247 * Just not sure how that interacts
1248 * with the RX/config path e.g. for
1257 case NL80211_IFTYPE_AP:
1258 case NL80211_IFTYPE_STATION:
1259 case NL80211_IFTYPE_ADHOC:
1261 * Could probably support everything
1262 * but WDS here (WDS do_open can fail
1263 * under memory pressure, which this
1264 * code isn't prepared to handle).
1267 case NL80211_IFTYPE_P2P_CLIENT:
1269 internal_type = NL80211_IFTYPE_STATION;
1271 case NL80211_IFTYPE_P2P_GO:
1273 internal_type = NL80211_IFTYPE_AP;
1279 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1283 ieee80211_do_stop(sdata, false);
1285 ieee80211_teardown_sdata(sdata);
1287 ret = drv_change_interface(local, sdata, internal_type, p2p);
1289 type = sdata->vif.type;
1292 * Ignore return value here, there's not much we can do since
1293 * the driver changed the interface type internally already.
1294 * The warnings will hopefully make driver authors fix it :-)
1296 ieee80211_check_queues(sdata);
1298 ieee80211_setup_sdata(sdata, type);
1300 err = ieee80211_do_open(&sdata->wdev, false);
1301 WARN(err, "type change: do_open returned %d", err);
1306 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1307 enum nl80211_iftype type)
1313 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1316 if (ieee80211_sdata_running(sdata)) {
1317 ret = ieee80211_runtime_change_iftype(sdata, type);
1321 /* Purge and reset type-dependent state. */
1322 ieee80211_teardown_sdata(sdata);
1323 ieee80211_setup_sdata(sdata, type);
1326 /* reset some values that shouldn't be kept across type changes */
1327 sdata->drop_unencrypted = 0;
1328 if (type == NL80211_IFTYPE_STATION)
1329 sdata->u.mgd.use_4addr = false;
1334 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1335 u8 *perm_addr, enum nl80211_iftype type)
1337 struct ieee80211_sub_if_data *sdata;
1338 u64 mask, start, addr, val, inc;
1340 u8 tmp_addr[ETH_ALEN];
1343 /* default ... something at least */
1344 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1346 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1347 local->hw.wiphy->n_addresses <= 1)
1350 mutex_lock(&local->iflist_mtx);
1353 case NL80211_IFTYPE_MONITOR:
1354 /* doesn't matter */
1356 case NL80211_IFTYPE_WDS:
1357 case NL80211_IFTYPE_AP_VLAN:
1358 /* match up with an AP interface */
1359 list_for_each_entry(sdata, &local->interfaces, list) {
1360 if (sdata->vif.type != NL80211_IFTYPE_AP)
1362 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1365 /* keep default if no AP interface present */
1367 case NL80211_IFTYPE_P2P_CLIENT:
1368 case NL80211_IFTYPE_P2P_GO:
1369 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1370 list_for_each_entry(sdata, &local->interfaces, list) {
1371 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1373 if (!ieee80211_sdata_running(sdata))
1375 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1379 /* otherwise fall through */
1381 /* assign a new address if possible -- try n_addresses first */
1382 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1385 list_for_each_entry(sdata, &local->interfaces, list) {
1386 if (memcmp(local->hw.wiphy->addresses[i].addr,
1387 sdata->vif.addr, ETH_ALEN) == 0) {
1395 local->hw.wiphy->addresses[i].addr,
1401 /* try mask if available */
1402 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1405 m = local->hw.wiphy->addr_mask;
1406 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1407 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1408 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1410 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1411 /* not a contiguous mask ... not handled now! */
1412 pr_info("not contiguous\n");
1416 m = local->hw.wiphy->perm_addr;
1417 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1418 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1419 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1421 inc = 1ULL<<__ffs64(mask);
1422 val = (start & mask);
1423 addr = (start & ~mask) | (val & mask);
1427 tmp_addr[5] = addr >> 0*8;
1428 tmp_addr[4] = addr >> 1*8;
1429 tmp_addr[3] = addr >> 2*8;
1430 tmp_addr[2] = addr >> 3*8;
1431 tmp_addr[1] = addr >> 4*8;
1432 tmp_addr[0] = addr >> 5*8;
1436 list_for_each_entry(sdata, &local->interfaces, list) {
1437 if (memcmp(tmp_addr, sdata->vif.addr,
1445 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1448 addr = (start & ~mask) | (val & mask);
1449 } while (addr != start);
1455 mutex_unlock(&local->iflist_mtx);
1458 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1460 struct ieee80211_sub_if_data *sdata;
1462 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1464 ieee80211_cleanup_sdata_stas(sdata);
1467 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1468 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1469 struct vif_params *params)
1471 struct net_device *ndev = NULL;
1472 struct ieee80211_sub_if_data *sdata = NULL;
1478 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1479 struct wireless_dev *wdev;
1481 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1485 wdev = &sdata->wdev;
1488 strlcpy(sdata->name, name, IFNAMSIZ);
1489 ieee80211_assign_perm_addr(local, wdev->address, type);
1490 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1492 if (local->hw.queues >= IEEE80211_NUM_ACS)
1493 txqs = IEEE80211_NUM_ACS;
1495 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1496 local->hw.vif_data_size,
1497 name, ieee80211_if_setup, txqs, 1);
1500 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1502 ndev->needed_headroom = local->tx_headroom +
1503 4*6 /* four MAC addresses */
1504 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1506 + 8 /* rfc1042/bridge tunnel */
1507 - ETH_HLEN /* ethernet hard_header_len */
1508 + IEEE80211_ENCRYPT_HEADROOM;
1509 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1511 ret = dev_alloc_name(ndev, ndev->name);
1517 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1518 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1519 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1521 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1522 sdata = netdev_priv(ndev);
1523 ndev->ieee80211_ptr = &sdata->wdev;
1524 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1525 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1530 /* initialise type-independent data */
1531 sdata->wdev.wiphy = local->hw.wiphy;
1532 sdata->local = local;
1534 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1535 skb_queue_head_init(&sdata->fragments[i].skb_list);
1537 INIT_LIST_HEAD(&sdata->key_list);
1539 spin_lock_init(&sdata->cleanup_stations_lock);
1540 INIT_LIST_HEAD(&sdata->cleanup_stations);
1541 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1542 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1543 ieee80211_dfs_cac_timer_work);
1545 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1546 struct ieee80211_supported_band *sband;
1547 sband = local->hw.wiphy->bands[i];
1548 sdata->rc_rateidx_mask[i] =
1549 sband ? (1 << sband->n_bitrates) - 1 : 0;
1551 memcpy(sdata->rc_rateidx_mcs_mask[i],
1552 sband->ht_cap.mcs.rx_mask,
1553 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1555 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1556 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1559 ieee80211_set_default_queues(sdata);
1561 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1562 sdata->user_power_level = local->user_power_level;
1564 /* setup type-dependent data */
1565 ieee80211_setup_sdata(sdata, type);
1569 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1570 if (type == NL80211_IFTYPE_STATION)
1571 sdata->u.mgd.use_4addr = params->use_4addr;
1574 ndev->features |= local->hw.netdev_features;
1576 ret = register_netdevice(ndev);
1583 mutex_lock(&local->iflist_mtx);
1584 list_add_tail_rcu(&sdata->list, &local->interfaces);
1585 mutex_unlock(&local->iflist_mtx);
1588 *new_wdev = &sdata->wdev;
1593 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1597 mutex_lock(&sdata->local->iflist_mtx);
1598 list_del_rcu(&sdata->list);
1599 mutex_unlock(&sdata->local->iflist_mtx);
1604 unregister_netdevice(sdata->dev);
1606 cfg80211_unregister_wdev(&sdata->wdev);
1611 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1613 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1615 ieee80211_do_stop(sdata, true);
1616 ieee80211_teardown_sdata(sdata);
1620 * Remove all interfaces, may only be called at hardware unregistration
1621 * time because it doesn't do RCU-safe list removals.
1623 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1625 struct ieee80211_sub_if_data *sdata, *tmp;
1626 LIST_HEAD(unreg_list);
1627 LIST_HEAD(wdev_list);
1631 mutex_lock(&local->iflist_mtx);
1632 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1633 list_del(&sdata->list);
1636 unregister_netdevice_queue(sdata->dev, &unreg_list);
1638 list_add(&sdata->list, &wdev_list);
1640 mutex_unlock(&local->iflist_mtx);
1641 unregister_netdevice_many(&unreg_list);
1642 list_del(&unreg_list);
1644 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1645 list_del(&sdata->list);
1646 cfg80211_unregister_wdev(&sdata->wdev);
1651 static int netdev_notify(struct notifier_block *nb,
1652 unsigned long state,
1655 struct net_device *dev = ndev;
1656 struct ieee80211_sub_if_data *sdata;
1658 if (state != NETDEV_CHANGENAME)
1661 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1664 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1667 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1669 memcpy(sdata->name, dev->name, IFNAMSIZ);
1671 ieee80211_debugfs_rename_netdev(sdata);
1675 static struct notifier_block mac80211_netdev_notifier = {
1676 .notifier_call = netdev_notify,
1679 int ieee80211_iface_init(void)
1681 return register_netdevice_notifier(&mac80211_netdev_notifier);
1684 void ieee80211_iface_exit(void)
1686 unregister_netdevice_notifier(&mac80211_netdev_notifier);