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>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 #include <linux/slab.h>
15 #include <linux/kernel.h>
16 #include <linux/if_arp.h>
17 #include <linux/netdevice.h>
18 #include <linux/rtnetlink.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
23 #include "debugfs_netdev.h"
26 #include "driver-ops.h"
31 * DOC: Interface list locking
33 * The interface list in each struct ieee80211_local is protected
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
46 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
48 struct ieee80211_chanctx_conf *chanctx_conf;
52 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
58 power = ieee80211_chandef_max_power(&chanctx_conf->def);
61 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
62 power = min(power, sdata->user_power_level);
64 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->ap_power_level);
67 if (power != sdata->vif.bss_conf.txpower) {
68 sdata->vif.bss_conf.txpower = power;
69 ieee80211_hw_config(sdata->local, 0);
76 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
79 if (__ieee80211_recalc_txpower(sdata) ||
80 (update_bss && ieee80211_sdata_running(sdata)))
81 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
84 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
86 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
89 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
90 return IEEE80211_CONF_CHANGE_IDLE;
93 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
95 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
98 ieee80211_flush_queues(local, NULL, false);
100 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
101 return IEEE80211_CONF_CHANGE_IDLE;
104 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
107 bool working, scanning, active;
108 unsigned int led_trig_start = 0, led_trig_stop = 0;
110 lockdep_assert_held(&local->mtx);
112 active = force_active ||
113 !list_empty(&local->chanctx_list) ||
116 working = !local->ops->remain_on_channel &&
117 !list_empty(&local->roc_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 return __ieee80211_idle_off(local);
136 return __ieee80211_idle_on(local);
139 u32 ieee80211_idle_off(struct ieee80211_local *local)
141 return __ieee80211_recalc_idle(local, true);
144 void ieee80211_recalc_idle(struct ieee80211_local *local)
146 u32 change = __ieee80211_recalc_idle(local, false);
148 ieee80211_hw_config(local, change);
151 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
153 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
160 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
163 struct ieee80211_local *local = sdata->local;
164 struct ieee80211_sub_if_data *iter;
169 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
173 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
177 m = local->hw.wiphy->addr_mask;
178 mask = ((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);
185 mutex_lock(&local->iflist_mtx);
186 list_for_each_entry(iter, &local->interfaces, list) {
190 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
191 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
195 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
196 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
197 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
199 if ((new & ~mask) != (tmp & ~mask)) {
204 mutex_unlock(&local->iflist_mtx);
209 static int ieee80211_change_mac(struct net_device *dev, void *addr)
211 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
212 struct sockaddr *sa = addr;
213 bool check_dup = true;
216 if (ieee80211_sdata_running(sdata))
219 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
220 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
223 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
227 ret = eth_mac_addr(dev, sa);
230 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
235 static inline int identical_mac_addr_allowed(int type1, int type2)
237 return type1 == NL80211_IFTYPE_MONITOR ||
238 type2 == NL80211_IFTYPE_MONITOR ||
239 type1 == NL80211_IFTYPE_P2P_DEVICE ||
240 type2 == NL80211_IFTYPE_P2P_DEVICE ||
241 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
242 (type1 == NL80211_IFTYPE_WDS &&
243 (type2 == NL80211_IFTYPE_WDS ||
244 type2 == NL80211_IFTYPE_AP)) ||
245 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
246 (type1 == NL80211_IFTYPE_AP_VLAN &&
247 (type2 == NL80211_IFTYPE_AP ||
248 type2 == NL80211_IFTYPE_AP_VLAN));
251 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
252 enum nl80211_iftype iftype)
254 struct ieee80211_local *local = sdata->local;
255 struct ieee80211_sub_if_data *nsdata;
260 /* we hold the RTNL here so can safely walk the list */
261 list_for_each_entry(nsdata, &local->interfaces, list) {
262 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
264 * Only OCB and monitor mode may coexist
266 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
267 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
268 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
269 nsdata->vif.type == NL80211_IFTYPE_OCB))
273 * Allow only a single IBSS interface to be up at any
274 * time. This is restricted because beacon distribution
275 * cannot work properly if both are in the same IBSS.
277 * To remove this restriction we'd have to disallow them
278 * from setting the same SSID on different IBSS interfaces
279 * belonging to the same hardware. Then, however, we're
280 * faced with having to adopt two different TSF timers...
282 if (iftype == NL80211_IFTYPE_ADHOC &&
283 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
286 * will not add another interface while any channel
289 if (nsdata->vif.csa_active)
293 * The remaining checks are only performed for interfaces
294 * with the same MAC address.
296 if (!ether_addr_equal(sdata->vif.addr,
301 * check whether it may have the same address
303 if (!identical_mac_addr_allowed(iftype,
308 * can only add VLANs to enabled APs
310 if (iftype == NL80211_IFTYPE_AP_VLAN &&
311 nsdata->vif.type == NL80211_IFTYPE_AP)
312 sdata->bss = &nsdata->u.ap;
316 mutex_lock(&local->chanctx_mtx);
317 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
318 mutex_unlock(&local->chanctx_mtx);
322 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
323 enum nl80211_iftype iftype)
325 int n_queues = sdata->local->hw.queues;
328 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
329 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
331 IEEE80211_INVAL_HW_QUEUE))
333 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
339 if ((iftype != NL80211_IFTYPE_AP &&
340 iftype != NL80211_IFTYPE_P2P_GO &&
341 iftype != NL80211_IFTYPE_MESH_POINT) ||
342 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
343 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
347 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
350 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
356 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
359 struct ieee80211_local *local = sdata->local;
360 u32 flags = sdata->u.mntr_flags;
362 #define ADJUST(_f, _s) do { \
363 if (flags & MONITOR_FLAG_##_f) \
364 local->fif_##_s += offset; \
367 ADJUST(FCSFAIL, fcsfail);
368 ADJUST(PLCPFAIL, plcpfail);
369 ADJUST(CONTROL, control);
370 ADJUST(CONTROL, pspoll);
371 ADJUST(OTHER_BSS, other_bss);
376 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
378 struct ieee80211_local *local = sdata->local;
381 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
382 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
383 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
384 else if (local->hw.queues >= IEEE80211_NUM_ACS)
385 sdata->vif.hw_queue[i] = i;
387 sdata->vif.hw_queue[i] = 0;
389 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
392 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
394 struct ieee80211_sub_if_data *sdata;
397 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
402 if (local->monitor_sdata)
405 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
410 sdata->local = local;
411 sdata->vif.type = NL80211_IFTYPE_MONITOR;
412 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
413 wiphy_name(local->hw.wiphy));
414 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
416 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
418 ieee80211_set_default_queues(sdata);
420 ret = drv_add_interface(local, sdata);
422 /* ok .. stupid driver, it asked for this! */
427 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
433 mutex_lock(&local->iflist_mtx);
434 rcu_assign_pointer(local->monitor_sdata, sdata);
435 mutex_unlock(&local->iflist_mtx);
437 mutex_lock(&local->mtx);
438 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
439 IEEE80211_CHANCTX_EXCLUSIVE);
440 mutex_unlock(&local->mtx);
442 mutex_lock(&local->iflist_mtx);
443 RCU_INIT_POINTER(local->monitor_sdata, NULL);
444 mutex_unlock(&local->iflist_mtx);
446 drv_remove_interface(local, sdata);
454 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
456 struct ieee80211_sub_if_data *sdata;
458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
463 mutex_lock(&local->iflist_mtx);
465 sdata = rcu_dereference_protected(local->monitor_sdata,
466 lockdep_is_held(&local->iflist_mtx));
468 mutex_unlock(&local->iflist_mtx);
472 RCU_INIT_POINTER(local->monitor_sdata, NULL);
473 mutex_unlock(&local->iflist_mtx);
477 mutex_lock(&local->mtx);
478 ieee80211_vif_release_channel(sdata);
479 mutex_unlock(&local->mtx);
481 drv_remove_interface(local, sdata);
487 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
491 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
494 struct net_device *dev = wdev->netdev;
495 struct ieee80211_local *local = sdata->local;
496 struct sta_info *sta;
499 u32 hw_reconf_flags = 0;
501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_WDS:
503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
506 case NL80211_IFTYPE_AP_VLAN: {
507 struct ieee80211_sub_if_data *master;
512 mutex_lock(&local->mtx);
513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
514 mutex_unlock(&local->mtx);
516 master = container_of(sdata->bss,
517 struct ieee80211_sub_if_data, u.ap);
518 sdata->control_port_protocol =
519 master->control_port_protocol;
520 sdata->control_port_no_encrypt =
521 master->control_port_no_encrypt;
522 sdata->vif.cab_queue = master->vif.cab_queue;
523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
524 sizeof(sdata->vif.hw_queue));
525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
527 mutex_lock(&local->key_mtx);
528 sdata->crypto_tx_tailroom_needed_cnt +=
529 master->crypto_tx_tailroom_needed_cnt;
530 mutex_unlock(&local->key_mtx);
534 case NL80211_IFTYPE_AP:
535 sdata->bss = &sdata->u.ap;
537 case NL80211_IFTYPE_MESH_POINT:
538 case NL80211_IFTYPE_STATION:
539 case NL80211_IFTYPE_MONITOR:
540 case NL80211_IFTYPE_ADHOC:
541 case NL80211_IFTYPE_P2P_DEVICE:
542 case NL80211_IFTYPE_OCB:
543 /* no special treatment */
545 case NL80211_IFTYPE_UNSPECIFIED:
546 case NUM_NL80211_IFTYPES:
547 case NL80211_IFTYPE_P2P_CLIENT:
548 case NL80211_IFTYPE_P2P_GO:
554 if (local->open_count == 0) {
555 res = drv_start(local);
558 /* we're brought up, everything changes */
559 hw_reconf_flags = ~0;
560 ieee80211_led_radio(local, true);
561 ieee80211_mod_tpt_led_trig(local,
562 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
566 * Copy the hopefully now-present MAC address to
567 * this interface, if it has the special null one.
569 if (dev && is_zero_ether_addr(dev->dev_addr)) {
570 memcpy(dev->dev_addr,
571 local->hw.wiphy->perm_addr,
573 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
575 if (!is_valid_ether_addr(dev->dev_addr)) {
576 res = -EADDRNOTAVAIL;
581 switch (sdata->vif.type) {
582 case NL80211_IFTYPE_AP_VLAN:
583 /* no need to tell driver, but set carrier and chanctx */
584 if (rtnl_dereference(sdata->bss->beacon)) {
585 ieee80211_vif_vlan_copy_chanctx(sdata);
586 netif_carrier_on(dev);
588 netif_carrier_off(dev);
591 case NL80211_IFTYPE_MONITOR:
592 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
593 local->cooked_mntrs++;
597 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
598 res = drv_add_interface(local, sdata);
601 } else if (local->monitors == 0 && local->open_count == 0) {
602 res = ieee80211_add_virtual_monitor(local);
607 /* must be before the call to ieee80211_configure_filter */
609 if (local->monitors == 1) {
610 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
611 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
614 ieee80211_adjust_monitor_flags(sdata, 1);
615 ieee80211_configure_filter(local);
616 mutex_lock(&local->mtx);
617 ieee80211_recalc_idle(local);
618 mutex_unlock(&local->mtx);
620 netif_carrier_on(dev);
624 ieee80211_del_virtual_monitor(local);
626 res = drv_add_interface(local, sdata);
629 res = ieee80211_check_queues(sdata,
630 ieee80211_vif_type_p2p(&sdata->vif));
632 goto err_del_interface;
635 if (sdata->vif.type == NL80211_IFTYPE_AP) {
637 local->fif_probe_req++;
639 ieee80211_configure_filter(local);
640 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
641 local->fif_probe_req++;
644 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
645 changed |= ieee80211_reset_erp_info(sdata);
646 ieee80211_bss_info_change_notify(sdata, changed);
648 switch (sdata->vif.type) {
649 case NL80211_IFTYPE_STATION:
650 case NL80211_IFTYPE_ADHOC:
651 case NL80211_IFTYPE_AP:
652 case NL80211_IFTYPE_MESH_POINT:
653 case NL80211_IFTYPE_OCB:
654 netif_carrier_off(dev);
656 case NL80211_IFTYPE_WDS:
657 case NL80211_IFTYPE_P2P_DEVICE:
665 * Set default queue parameters so drivers don't
666 * need to initialise the hardware if the hardware
667 * doesn't start up with sane defaults.
668 * Enable QoS for anything but station interfaces.
670 ieee80211_set_wmm_default(sdata, true,
671 sdata->vif.type != NL80211_IFTYPE_STATION);
674 set_bit(SDATA_STATE_RUNNING, &sdata->state);
676 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
677 /* Create STA entry for the WDS peer */
678 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
682 goto err_del_interface;
685 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
686 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
687 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
689 res = sta_info_insert(sta);
691 /* STA has been freed */
692 goto err_del_interface;
695 rate_control_rate_init(sta);
696 netif_carrier_on(dev);
697 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
698 rcu_assign_pointer(local->p2p_sdata, sdata);
702 * set_multicast_list will be invoked by the networking core
703 * which will check whether any increments here were done in
704 * error and sync them down to the hardware as filter flags.
706 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
707 atomic_inc(&local->iff_allmultis);
713 ieee80211_hw_config(local, hw_reconf_flags);
715 ieee80211_recalc_ps(local);
717 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
718 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
719 /* XXX: for AP_VLAN, actually track AP queues */
720 netif_tx_start_all_queues(dev);
723 int n_acs = IEEE80211_NUM_ACS;
726 if (local->hw.queues < IEEE80211_NUM_ACS)
729 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
730 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
731 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
732 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
733 for (ac = 0; ac < n_acs; ac++) {
734 int ac_queue = sdata->vif.hw_queue[ac];
736 if (local->queue_stop_reasons[ac_queue] == 0 &&
737 skb_queue_empty(&local->pending[ac_queue]))
738 netif_start_subqueue(dev, ac);
741 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
746 drv_remove_interface(local, sdata);
748 if (!local->open_count)
752 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
753 mutex_lock(&local->mtx);
754 list_del(&sdata->u.vlan.list);
755 mutex_unlock(&local->mtx);
757 /* might already be clear but that doesn't matter */
758 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
762 static int ieee80211_open(struct net_device *dev)
764 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
767 /* fail early if user set an invalid address */
768 if (!is_valid_ether_addr(dev->dev_addr))
769 return -EADDRNOTAVAIL;
771 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
775 return ieee80211_do_open(&sdata->wdev, true);
778 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
781 struct ieee80211_local *local = sdata->local;
783 struct sk_buff *skb, *tmp;
784 u32 hw_reconf_flags = 0;
787 struct cfg80211_chan_def chandef;
790 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
792 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
794 ieee80211_scan_cancel(local);
797 * Stop TX on this interface first.
800 netif_tx_stop_all_queues(sdata->dev);
802 ieee80211_roc_purge(local, sdata);
804 switch (sdata->vif.type) {
805 case NL80211_IFTYPE_STATION:
806 ieee80211_mgd_stop(sdata);
808 case NL80211_IFTYPE_ADHOC:
809 ieee80211_ibss_stop(sdata);
811 case NL80211_IFTYPE_AP:
812 cancel_work_sync(&sdata->u.ap.request_smps_work);
819 * Remove all stations associated with this interface.
821 * This must be done before calling ops->remove_interface()
822 * because otherwise we can later invoke ops->sta_notify()
823 * whenever the STAs are removed, and that invalidates driver
824 * assumptions about always getting a vif pointer that is valid
825 * (because if we remove a STA after ops->remove_interface()
826 * the driver will have removed the vif info already!)
828 * In WDS mode a station must exist here and be flushed, for
829 * AP_VLANs stations may exist since there's nothing else that
830 * would have removed them, but in other modes there shouldn't
833 flushed = sta_info_flush(sdata);
834 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
835 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
836 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
838 /* don't count this interface for allmulti while it is down */
839 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
840 atomic_dec(&local->iff_allmultis);
842 if (sdata->vif.type == NL80211_IFTYPE_AP) {
844 local->fif_probe_req--;
845 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
846 local->fif_probe_req--;
850 netif_addr_lock_bh(sdata->dev);
851 spin_lock_bh(&local->filter_lock);
852 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
853 sdata->dev->addr_len);
854 spin_unlock_bh(&local->filter_lock);
855 netif_addr_unlock_bh(sdata->dev);
858 del_timer_sync(&local->dynamic_ps_timer);
859 cancel_work_sync(&local->dynamic_ps_enable_work);
861 cancel_work_sync(&sdata->recalc_smps);
863 mutex_lock(&local->mtx);
864 sdata->vif.csa_active = false;
865 if (sdata->vif.type == NL80211_IFTYPE_STATION)
866 sdata->u.mgd.csa_waiting_bcn = false;
867 if (sdata->csa_block_tx) {
868 ieee80211_wake_vif_queues(local, sdata,
869 IEEE80211_QUEUE_STOP_REASON_CSA);
870 sdata->csa_block_tx = false;
872 mutex_unlock(&local->mtx);
875 cancel_work_sync(&sdata->csa_finalize_work);
877 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
879 if (sdata->wdev.cac_started) {
880 chandef = sdata->vif.bss_conf.chandef;
881 WARN_ON(local->suspended);
882 mutex_lock(&local->mtx);
883 ieee80211_vif_release_channel(sdata);
884 mutex_unlock(&local->mtx);
885 cfg80211_cac_event(sdata->dev, &chandef,
886 NL80211_RADAR_CAC_ABORTED,
890 /* APs need special treatment */
891 if (sdata->vif.type == NL80211_IFTYPE_AP) {
892 struct ieee80211_sub_if_data *vlan, *tmpsdata;
894 /* down all dependent devices, that is VLANs */
895 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
897 dev_close(vlan->dev);
898 WARN_ON(!list_empty(&sdata->u.ap.vlans));
899 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
900 /* remove all packets in parent bc_buf pointing to this dev */
901 ps = &sdata->bss->ps;
903 spin_lock_irqsave(&ps->bc_buf.lock, flags);
904 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
905 if (skb->dev == sdata->dev) {
906 __skb_unlink(skb, &ps->bc_buf);
907 local->total_ps_buffered--;
908 ieee80211_free_txskb(&local->hw, skb);
911 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
917 switch (sdata->vif.type) {
918 case NL80211_IFTYPE_AP_VLAN:
919 mutex_lock(&local->mtx);
920 list_del(&sdata->u.vlan.list);
921 mutex_unlock(&local->mtx);
922 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
923 /* see comment in the default case below */
924 ieee80211_free_keys(sdata, true);
925 /* no need to tell driver */
927 case NL80211_IFTYPE_MONITOR:
928 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
929 local->cooked_mntrs--;
934 if (local->monitors == 0) {
935 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
936 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
939 ieee80211_adjust_monitor_flags(sdata, -1);
941 case NL80211_IFTYPE_P2P_DEVICE:
942 /* relies on synchronize_rcu() below */
943 RCU_INIT_POINTER(local->p2p_sdata, NULL);
946 cancel_work_sync(&sdata->work);
948 * When we get here, the interface is marked down.
949 * Free the remaining keys, if there are any
950 * (which can happen in AP mode if userspace sets
951 * keys before the interface is operating, and maybe
954 * Force the key freeing to always synchronize_net()
955 * to wait for the RX path in case it is using this
956 * interface enqueuing frames at this very time on
959 ieee80211_free_keys(sdata, true);
960 skb_queue_purge(&sdata->skb_queue);
965 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
966 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
967 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
968 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
969 if (info->control.vif == &sdata->vif) {
970 __skb_unlink(skb, &local->pending[i]);
971 ieee80211_free_txskb(&local->hw, skb);
975 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
977 if (sdata->vif.txq) {
978 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
980 spin_lock_bh(&txqi->queue.lock);
981 ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
982 spin_unlock_bh(&txqi->queue.lock);
984 atomic_set(&sdata->txqs_len[txqi->txq.ac], 0);
987 if (local->open_count == 0)
988 ieee80211_clear_tx_pending(local);
990 sdata->vif.bss_conf.beacon_int = 0;
993 * If the interface goes down while suspended, presumably because
994 * the device was unplugged and that happens before our resume,
995 * then the driver is already unconfigured and the remainder of
996 * this function isn't needed.
997 * XXX: what about WoWLAN? If the device has software state, e.g.
998 * memory allocated, it might expect teardown commands from
1001 if (local->suspended) {
1002 WARN_ON(local->wowlan);
1003 WARN_ON(rtnl_dereference(local->monitor_sdata));
1007 switch (sdata->vif.type) {
1008 case NL80211_IFTYPE_AP_VLAN:
1010 case NL80211_IFTYPE_MONITOR:
1011 if (local->monitors == 0)
1012 ieee80211_del_virtual_monitor(local);
1014 mutex_lock(&local->mtx);
1015 ieee80211_recalc_idle(local);
1016 mutex_unlock(&local->mtx);
1018 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1024 drv_remove_interface(local, sdata);
1027 ieee80211_recalc_ps(local);
1030 flush_delayed_work(&local->scan_work);
1032 if (local->open_count == 0) {
1033 ieee80211_stop_device(local);
1035 /* no reconfiguring after stop! */
1039 /* do after stop to avoid reconfiguring when we stop anyway */
1040 ieee80211_configure_filter(local);
1041 ieee80211_hw_config(local, hw_reconf_flags);
1043 if (local->monitors == local->open_count)
1044 ieee80211_add_virtual_monitor(local);
1047 static int ieee80211_stop(struct net_device *dev)
1049 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1051 ieee80211_do_stop(sdata, true);
1056 static void ieee80211_set_multicast_list(struct net_device *dev)
1058 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1059 struct ieee80211_local *local = sdata->local;
1060 int allmulti, sdata_allmulti;
1062 allmulti = !!(dev->flags & IFF_ALLMULTI);
1063 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1065 if (allmulti != sdata_allmulti) {
1066 if (dev->flags & IFF_ALLMULTI)
1067 atomic_inc(&local->iff_allmultis);
1069 atomic_dec(&local->iff_allmultis);
1070 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1073 spin_lock_bh(&local->filter_lock);
1074 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1075 spin_unlock_bh(&local->filter_lock);
1076 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1080 * Called when the netdev is removed or, by the code below, before
1081 * the interface type changes.
1083 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1085 /* free extra data */
1086 ieee80211_free_keys(sdata, false);
1088 ieee80211_debugfs_remove_netdev(sdata);
1090 ieee80211_destroy_frag_cache(&sdata->frags);
1092 if (ieee80211_vif_is_mesh(&sdata->vif))
1093 mesh_rmc_free(sdata);
1096 static void ieee80211_uninit(struct net_device *dev)
1098 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1101 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1102 struct sk_buff *skb,
1104 select_queue_fallback_t fallback)
1106 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1109 static struct rtnl_link_stats64 *
1110 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1114 for_each_possible_cpu(i) {
1115 const struct pcpu_sw_netstats *tstats;
1116 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1119 tstats = per_cpu_ptr(dev->tstats, i);
1122 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1123 rx_packets = tstats->rx_packets;
1124 tx_packets = tstats->tx_packets;
1125 rx_bytes = tstats->rx_bytes;
1126 tx_bytes = tstats->tx_bytes;
1127 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1129 stats->rx_packets += rx_packets;
1130 stats->tx_packets += tx_packets;
1131 stats->rx_bytes += rx_bytes;
1132 stats->tx_bytes += tx_bytes;
1138 static const struct net_device_ops ieee80211_dataif_ops = {
1139 .ndo_open = ieee80211_open,
1140 .ndo_stop = ieee80211_stop,
1141 .ndo_uninit = ieee80211_uninit,
1142 .ndo_start_xmit = ieee80211_subif_start_xmit,
1143 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1144 .ndo_change_mtu = ieee80211_change_mtu,
1145 .ndo_set_mac_address = ieee80211_change_mac,
1146 .ndo_select_queue = ieee80211_netdev_select_queue,
1147 .ndo_get_stats64 = ieee80211_get_stats64,
1150 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1151 struct sk_buff *skb,
1153 select_queue_fallback_t fallback)
1155 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1156 struct ieee80211_local *local = sdata->local;
1157 struct ieee80211_hdr *hdr;
1158 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1160 if (local->hw.queues < IEEE80211_NUM_ACS)
1164 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1165 return 0; /* doesn't matter, frame will be dropped */
1167 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1169 return ieee80211_select_queue_80211(sdata, skb, hdr);
1172 static const struct net_device_ops ieee80211_monitorif_ops = {
1173 .ndo_open = ieee80211_open,
1174 .ndo_stop = ieee80211_stop,
1175 .ndo_uninit = ieee80211_uninit,
1176 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1177 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1178 .ndo_change_mtu = ieee80211_change_mtu,
1179 .ndo_set_mac_address = ieee80211_change_mac,
1180 .ndo_select_queue = ieee80211_monitor_select_queue,
1181 .ndo_get_stats64 = ieee80211_get_stats64,
1184 static void ieee80211_if_free(struct net_device *dev)
1186 free_percpu(dev->tstats);
1190 static void ieee80211_if_setup(struct net_device *dev)
1193 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1194 dev->netdev_ops = &ieee80211_dataif_ops;
1195 dev->destructor = ieee80211_if_free;
1198 static void ieee80211_iface_work(struct work_struct *work)
1200 struct ieee80211_sub_if_data *sdata =
1201 container_of(work, struct ieee80211_sub_if_data, work);
1202 struct ieee80211_local *local = sdata->local;
1203 struct sk_buff *skb;
1204 struct sta_info *sta;
1205 struct ieee80211_ra_tid *ra_tid;
1206 struct ieee80211_rx_agg *rx_agg;
1208 if (!ieee80211_sdata_running(sdata))
1211 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1214 if (!ieee80211_can_run_worker(local))
1217 /* first process frames */
1218 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1219 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1221 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1222 ra_tid = (void *)&skb->cb;
1223 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1225 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1226 ra_tid = (void *)&skb->cb;
1227 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1229 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1230 rx_agg = (void *)&skb->cb;
1231 mutex_lock(&local->sta_mtx);
1232 sta = sta_info_get_bss(sdata, rx_agg->addr);
1234 __ieee80211_start_rx_ba_session(sta,
1235 0, 0, 0, 1, rx_agg->tid,
1236 IEEE80211_MAX_AMPDU_BUF,
1238 mutex_unlock(&local->sta_mtx);
1239 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1240 rx_agg = (void *)&skb->cb;
1241 mutex_lock(&local->sta_mtx);
1242 sta = sta_info_get_bss(sdata, rx_agg->addr);
1244 __ieee80211_stop_rx_ba_session(sta,
1246 WLAN_BACK_RECIPIENT, 0,
1248 mutex_unlock(&local->sta_mtx);
1249 } else if (ieee80211_is_action(mgmt->frame_control) &&
1250 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1253 mutex_lock(&local->sta_mtx);
1254 sta = sta_info_get_bss(sdata, mgmt->sa);
1256 switch (mgmt->u.action.u.addba_req.action_code) {
1257 case WLAN_ACTION_ADDBA_REQ:
1258 ieee80211_process_addba_request(
1259 local, sta, mgmt, len);
1261 case WLAN_ACTION_ADDBA_RESP:
1262 ieee80211_process_addba_resp(local, sta,
1265 case WLAN_ACTION_DELBA:
1266 ieee80211_process_delba(sdata, sta,
1274 mutex_unlock(&local->sta_mtx);
1275 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1276 struct ieee80211_hdr *hdr = (void *)mgmt;
1278 * So the frame isn't mgmt, but frame_control
1279 * is at the right place anyway, of course, so
1280 * the if statement is correct.
1282 * Warn if we have other data frame types here,
1283 * they must not get here.
1285 WARN_ON(hdr->frame_control &
1286 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1287 WARN_ON(!(hdr->seq_ctrl &
1288 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1290 * This was a fragment of a frame, received while
1291 * a block-ack session was active. That cannot be
1292 * right, so terminate the session.
1294 mutex_lock(&local->sta_mtx);
1295 sta = sta_info_get_bss(sdata, mgmt->sa);
1297 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1298 IEEE80211_QOS_CTL_TID_MASK;
1300 __ieee80211_stop_rx_ba_session(
1301 sta, tid, WLAN_BACK_RECIPIENT,
1302 WLAN_REASON_QSTA_REQUIRE_SETUP,
1305 mutex_unlock(&local->sta_mtx);
1306 } else switch (sdata->vif.type) {
1307 case NL80211_IFTYPE_STATION:
1308 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1310 case NL80211_IFTYPE_ADHOC:
1311 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1313 case NL80211_IFTYPE_MESH_POINT:
1314 if (!ieee80211_vif_is_mesh(&sdata->vif))
1316 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1319 WARN(1, "frame for unexpected interface type");
1326 /* then other type-dependent work */
1327 switch (sdata->vif.type) {
1328 case NL80211_IFTYPE_STATION:
1329 ieee80211_sta_work(sdata);
1331 case NL80211_IFTYPE_ADHOC:
1332 ieee80211_ibss_work(sdata);
1334 case NL80211_IFTYPE_MESH_POINT:
1335 if (!ieee80211_vif_is_mesh(&sdata->vif))
1337 ieee80211_mesh_work(sdata);
1339 case NL80211_IFTYPE_OCB:
1340 ieee80211_ocb_work(sdata);
1347 static void ieee80211_recalc_smps_work(struct work_struct *work)
1349 struct ieee80211_sub_if_data *sdata =
1350 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1352 ieee80211_recalc_smps(sdata);
1356 * Helper function to initialise an interface to a specific type.
1358 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1359 enum nl80211_iftype type)
1361 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1364 /* clear type-dependent union */
1365 memset(&sdata->u, 0, sizeof(sdata->u));
1367 /* and set some type-dependent values */
1368 sdata->vif.type = type;
1369 sdata->vif.p2p = false;
1370 sdata->wdev.iftype = type;
1372 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1373 sdata->control_port_no_encrypt = false;
1374 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1375 sdata->vif.bss_conf.idle = true;
1377 sdata->noack_map = 0;
1379 /* only monitor/p2p-device differ */
1381 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1382 sdata->dev->type = ARPHRD_ETHER;
1385 skb_queue_head_init(&sdata->skb_queue);
1386 INIT_WORK(&sdata->work, ieee80211_iface_work);
1387 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1388 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1389 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1390 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1393 case NL80211_IFTYPE_P2P_GO:
1394 type = NL80211_IFTYPE_AP;
1395 sdata->vif.type = type;
1396 sdata->vif.p2p = true;
1398 case NL80211_IFTYPE_AP:
1399 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1400 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1401 INIT_WORK(&sdata->u.ap.request_smps_work,
1402 ieee80211_request_smps_ap_work);
1403 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1404 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1406 case NL80211_IFTYPE_P2P_CLIENT:
1407 type = NL80211_IFTYPE_STATION;
1408 sdata->vif.type = type;
1409 sdata->vif.p2p = true;
1411 case NL80211_IFTYPE_STATION:
1412 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1413 ieee80211_sta_setup_sdata(sdata);
1415 case NL80211_IFTYPE_OCB:
1416 sdata->vif.bss_conf.bssid = bssid_wildcard;
1417 ieee80211_ocb_setup_sdata(sdata);
1419 case NL80211_IFTYPE_ADHOC:
1420 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1421 ieee80211_ibss_setup_sdata(sdata);
1423 case NL80211_IFTYPE_MESH_POINT:
1424 if (ieee80211_vif_is_mesh(&sdata->vif))
1425 ieee80211_mesh_init_sdata(sdata);
1427 case NL80211_IFTYPE_MONITOR:
1428 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1429 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1430 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1431 MONITOR_FLAG_OTHER_BSS;
1433 case NL80211_IFTYPE_WDS:
1434 sdata->vif.bss_conf.bssid = NULL;
1436 case NL80211_IFTYPE_AP_VLAN:
1437 case NL80211_IFTYPE_P2P_DEVICE:
1438 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1440 case NL80211_IFTYPE_UNSPECIFIED:
1441 case NUM_NL80211_IFTYPES:
1446 ieee80211_debugfs_add_netdev(sdata);
1449 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1450 enum nl80211_iftype type)
1452 struct ieee80211_local *local = sdata->local;
1454 enum nl80211_iftype internal_type = type;
1459 if (!local->ops->change_interface)
1462 switch (sdata->vif.type) {
1463 case NL80211_IFTYPE_AP:
1464 case NL80211_IFTYPE_STATION:
1465 case NL80211_IFTYPE_ADHOC:
1466 case NL80211_IFTYPE_OCB:
1468 * Could maybe also all others here?
1469 * Just not sure how that interacts
1470 * with the RX/config path e.g. for
1479 case NL80211_IFTYPE_AP:
1480 case NL80211_IFTYPE_STATION:
1481 case NL80211_IFTYPE_ADHOC:
1482 case NL80211_IFTYPE_OCB:
1484 * Could probably support everything
1485 * but WDS here (WDS do_open can fail
1486 * under memory pressure, which this
1487 * code isn't prepared to handle).
1490 case NL80211_IFTYPE_P2P_CLIENT:
1492 internal_type = NL80211_IFTYPE_STATION;
1494 case NL80211_IFTYPE_P2P_GO:
1496 internal_type = NL80211_IFTYPE_AP;
1502 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1506 ieee80211_stop_vif_queues(local, sdata,
1507 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1510 ieee80211_do_stop(sdata, false);
1512 ieee80211_teardown_sdata(sdata);
1514 ret = drv_change_interface(local, sdata, internal_type, p2p);
1516 type = ieee80211_vif_type_p2p(&sdata->vif);
1519 * Ignore return value here, there's not much we can do since
1520 * the driver changed the interface type internally already.
1521 * The warnings will hopefully make driver authors fix it :-)
1523 ieee80211_check_queues(sdata, type);
1525 ieee80211_setup_sdata(sdata, type);
1527 err = ieee80211_do_open(&sdata->wdev, false);
1528 WARN(err, "type change: do_open returned %d", err);
1530 ieee80211_wake_vif_queues(local, sdata,
1531 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1535 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1536 enum nl80211_iftype type)
1542 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1545 if (ieee80211_sdata_running(sdata)) {
1546 ret = ieee80211_runtime_change_iftype(sdata, type);
1550 /* Purge and reset type-dependent state. */
1551 ieee80211_teardown_sdata(sdata);
1552 ieee80211_setup_sdata(sdata, type);
1555 /* reset some values that shouldn't be kept across type changes */
1556 if (type == NL80211_IFTYPE_STATION)
1557 sdata->u.mgd.use_4addr = false;
1562 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1563 u8 *perm_addr, enum nl80211_iftype type)
1565 struct ieee80211_sub_if_data *sdata;
1566 u64 mask, start, addr, val, inc;
1568 u8 tmp_addr[ETH_ALEN];
1571 /* default ... something at least */
1572 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1574 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1575 local->hw.wiphy->n_addresses <= 1)
1578 mutex_lock(&local->iflist_mtx);
1581 case NL80211_IFTYPE_MONITOR:
1582 /* doesn't matter */
1584 case NL80211_IFTYPE_WDS:
1585 case NL80211_IFTYPE_AP_VLAN:
1586 /* match up with an AP interface */
1587 list_for_each_entry(sdata, &local->interfaces, list) {
1588 if (sdata->vif.type != NL80211_IFTYPE_AP)
1590 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1593 /* keep default if no AP interface present */
1595 case NL80211_IFTYPE_P2P_CLIENT:
1596 case NL80211_IFTYPE_P2P_GO:
1597 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1598 list_for_each_entry(sdata, &local->interfaces, list) {
1599 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1601 if (!ieee80211_sdata_running(sdata))
1603 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1607 /* otherwise fall through */
1609 /* assign a new address if possible -- try n_addresses first */
1610 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1613 list_for_each_entry(sdata, &local->interfaces, list) {
1614 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1623 local->hw.wiphy->addresses[i].addr,
1629 /* try mask if available */
1630 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1633 m = local->hw.wiphy->addr_mask;
1634 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1635 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1636 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1638 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1639 /* not a contiguous mask ... not handled now! */
1640 pr_info("not contiguous\n");
1645 * Pick address of existing interface in case user changed
1646 * MAC address manually, default to perm_addr.
1648 m = local->hw.wiphy->perm_addr;
1649 list_for_each_entry(sdata, &local->interfaces, list) {
1650 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1652 m = sdata->vif.addr;
1655 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1656 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1657 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1659 inc = 1ULL<<__ffs64(mask);
1660 val = (start & mask);
1661 addr = (start & ~mask) | (val & mask);
1665 tmp_addr[5] = addr >> 0*8;
1666 tmp_addr[4] = addr >> 1*8;
1667 tmp_addr[3] = addr >> 2*8;
1668 tmp_addr[2] = addr >> 3*8;
1669 tmp_addr[1] = addr >> 4*8;
1670 tmp_addr[0] = addr >> 5*8;
1674 list_for_each_entry(sdata, &local->interfaces, list) {
1675 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1682 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1685 addr = (start & ~mask) | (val & mask);
1686 } while (addr != start);
1692 mutex_unlock(&local->iflist_mtx);
1695 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1696 unsigned char name_assign_type,
1697 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1698 struct vif_params *params)
1700 struct net_device *ndev = NULL;
1701 struct ieee80211_sub_if_data *sdata = NULL;
1702 struct txq_info *txqi;
1708 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1709 struct wireless_dev *wdev;
1711 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1715 wdev = &sdata->wdev;
1718 strlcpy(sdata->name, name, IFNAMSIZ);
1719 ieee80211_assign_perm_addr(local, wdev->address, type);
1720 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1722 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1726 if (local->ops->wake_tx_queue)
1727 txq_size += sizeof(struct txq_info) +
1728 local->hw.txq_data_size;
1730 if (local->hw.queues >= IEEE80211_NUM_ACS)
1731 txqs = IEEE80211_NUM_ACS;
1733 ndev = alloc_netdev_mqs(size + txq_size,
1734 name, name_assign_type,
1735 ieee80211_if_setup, txqs, 1);
1738 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1740 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1741 if (!ndev->tstats) {
1746 ndev->needed_headroom = local->tx_headroom +
1747 4*6 /* four MAC addresses */
1748 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1750 + 8 /* rfc1042/bridge tunnel */
1751 - ETH_HLEN /* ethernet hard_header_len */
1752 + IEEE80211_ENCRYPT_HEADROOM;
1753 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1755 ret = dev_alloc_name(ndev, ndev->name);
1757 ieee80211_if_free(ndev);
1761 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1762 if (params && is_valid_ether_addr(params->macaddr))
1763 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1765 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1766 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1768 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1769 sdata = netdev_priv(ndev);
1770 ndev->ieee80211_ptr = &sdata->wdev;
1771 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1772 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1775 txqi = netdev_priv(ndev) + size;
1776 ieee80211_init_tx_queue(sdata, NULL, txqi, 0);
1782 /* initialise type-independent data */
1783 sdata->wdev.wiphy = local->hw.wiphy;
1784 sdata->local = local;
1786 ieee80211_init_frag_cache(&sdata->frags);
1788 INIT_LIST_HEAD(&sdata->key_list);
1790 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1791 ieee80211_dfs_cac_timer_work);
1792 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1793 ieee80211_delayed_tailroom_dec);
1795 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1796 struct ieee80211_supported_band *sband;
1797 sband = local->hw.wiphy->bands[i];
1798 sdata->rc_rateidx_mask[i] =
1799 sband ? (1 << sband->n_bitrates) - 1 : 0;
1804 memcpy(sdata->rc_rateidx_mcs_mask[i],
1805 sband->ht_cap.mcs.rx_mask,
1806 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1808 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1809 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1810 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1812 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1813 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1814 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1815 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1819 ieee80211_set_default_queues(sdata);
1821 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1822 sdata->user_power_level = local->user_power_level;
1824 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1826 /* setup type-dependent data */
1827 ieee80211_setup_sdata(sdata, type);
1831 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1832 if (type == NL80211_IFTYPE_STATION)
1833 sdata->u.mgd.use_4addr = params->use_4addr;
1836 ndev->features |= local->hw.netdev_features;
1838 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1840 ret = register_netdevice(ndev);
1842 ieee80211_if_free(ndev);
1847 mutex_lock(&local->iflist_mtx);
1848 list_add_tail_rcu(&sdata->list, &local->interfaces);
1849 mutex_unlock(&local->iflist_mtx);
1852 *new_wdev = &sdata->wdev;
1857 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1861 mutex_lock(&sdata->local->iflist_mtx);
1862 list_del_rcu(&sdata->list);
1863 mutex_unlock(&sdata->local->iflist_mtx);
1868 unregister_netdevice(sdata->dev);
1870 cfg80211_unregister_wdev(&sdata->wdev);
1871 ieee80211_teardown_sdata(sdata);
1876 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1878 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1880 ieee80211_do_stop(sdata, true);
1883 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1885 struct ieee80211_sub_if_data *sdata, *tmp;
1886 LIST_HEAD(unreg_list);
1887 LIST_HEAD(wdev_list);
1891 /* Before destroying the interfaces, make sure they're all stopped so
1892 * that the hardware is stopped. Otherwise, the driver might still be
1893 * iterating the interfaces during the shutdown, e.g. from a worker
1894 * or from RX processing or similar, and if it does so (using atomic
1895 * iteration) while we're manipulating the list, the iteration will
1898 * After this, the hardware should be stopped and the driver should
1899 * have stopped all of its activities, so that we can do RCU-unaware
1900 * manipulations of the interface list below.
1902 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1904 WARN(local->open_count, "%s: open count remains %d\n",
1905 wiphy_name(local->hw.wiphy), local->open_count);
1907 mutex_lock(&local->iflist_mtx);
1908 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1909 list_del(&sdata->list);
1912 unregister_netdevice_queue(sdata->dev, &unreg_list);
1914 list_add(&sdata->list, &wdev_list);
1916 mutex_unlock(&local->iflist_mtx);
1917 unregister_netdevice_many(&unreg_list);
1919 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1920 list_del(&sdata->list);
1921 cfg80211_unregister_wdev(&sdata->wdev);
1926 static int netdev_notify(struct notifier_block *nb,
1927 unsigned long state, void *ptr)
1929 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1930 struct ieee80211_sub_if_data *sdata;
1932 if (state != NETDEV_CHANGENAME)
1935 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1938 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1941 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1942 memcpy(sdata->name, dev->name, IFNAMSIZ);
1943 ieee80211_debugfs_rename_netdev(sdata);
1948 static struct notifier_block mac80211_netdev_notifier = {
1949 .notifier_call = netdev_notify,
1952 int ieee80211_iface_init(void)
1954 return register_netdevice_notifier(&mac80211_netdev_notifier);
1957 void ieee80211_iface_exit(void)
1959 unregister_netdevice_notifier(&mac80211_netdev_notifier);