1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018-2021 Intel Corporation
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 <linux/kcov.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 static void ieee80211_iface_work(struct work_struct *work);
48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
50 struct ieee80211_chanctx_conf *chanctx_conf;
54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
60 power = ieee80211_chandef_max_power(&chanctx_conf->def);
63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->user_power_level);
66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->ap_power_level);
69 if (power != sdata->vif.bss_conf.txpower) {
70 sdata->vif.bss_conf.txpower = power;
71 ieee80211_hw_config(sdata->local, 0);
78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
81 if (__ieee80211_recalc_txpower(sdata) ||
82 (update_bss && ieee80211_sdata_running(sdata)))
83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
86 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
92 return IEEE80211_CONF_CHANGE_IDLE;
95 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
100 ieee80211_flush_queues(local, NULL, false);
102 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
103 return IEEE80211_CONF_CHANGE_IDLE;
106 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
109 bool working, scanning, active;
110 unsigned int led_trig_start = 0, led_trig_stop = 0;
112 lockdep_assert_held(&local->mtx);
114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136 if (working || scanning || active)
137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
141 u32 ieee80211_idle_off(struct ieee80211_local *local)
143 return __ieee80211_recalc_idle(local, true);
146 void ieee80211_recalc_idle(struct ieee80211_local *local)
148 u32 change = __ieee80211_recalc_idle(local, false);
150 ieee80211_hw_config(local, change);
153 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
156 struct ieee80211_local *local = sdata->local;
157 struct ieee80211_sub_if_data *iter;
162 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
166 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
167 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
168 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170 m = local->hw.wiphy->addr_mask;
171 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178 mutex_lock(&local->iflist_mtx);
179 list_for_each_entry(iter, &local->interfaces, list) {
183 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192 if ((new & ~mask) != (tmp & ~mask)) {
197 mutex_unlock(&local->iflist_mtx);
202 static int ieee80211_change_mac(struct net_device *dev, void *addr)
204 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
205 struct sockaddr *sa = addr;
206 bool check_dup = true;
209 if (ieee80211_sdata_running(sdata))
212 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
213 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
216 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
220 ret = eth_mac_addr(dev, sa);
223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
228 static inline int identical_mac_addr_allowed(int type1, int type2)
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
235 (type1 == NL80211_IFTYPE_AP_VLAN &&
236 (type2 == NL80211_IFTYPE_AP ||
237 type2 == NL80211_IFTYPE_AP_VLAN));
240 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
241 enum nl80211_iftype iftype)
243 struct ieee80211_local *local = sdata->local;
244 struct ieee80211_sub_if_data *nsdata;
249 /* we hold the RTNL here so can safely walk the list */
250 list_for_each_entry(nsdata, &local->interfaces, list) {
251 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
253 * Only OCB and monitor mode may coexist
255 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
256 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
257 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
258 nsdata->vif.type == NL80211_IFTYPE_OCB))
262 * Allow only a single IBSS interface to be up at any
263 * time. This is restricted because beacon distribution
264 * cannot work properly if both are in the same IBSS.
266 * To remove this restriction we'd have to disallow them
267 * from setting the same SSID on different IBSS interfaces
268 * belonging to the same hardware. Then, however, we're
269 * faced with having to adopt two different TSF timers...
271 if (iftype == NL80211_IFTYPE_ADHOC &&
272 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
275 * will not add another interface while any channel
278 if (nsdata->vif.csa_active)
282 * The remaining checks are only performed for interfaces
283 * with the same MAC address.
285 if (!ether_addr_equal(sdata->vif.addr,
290 * check whether it may have the same address
292 if (!identical_mac_addr_allowed(iftype,
297 * can only add VLANs to enabled APs
299 if (iftype == NL80211_IFTYPE_AP_VLAN &&
300 nsdata->vif.type == NL80211_IFTYPE_AP)
301 sdata->bss = &nsdata->u.ap;
305 mutex_lock(&local->chanctx_mtx);
306 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
307 mutex_unlock(&local->chanctx_mtx);
311 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
314 int n_queues = sdata->local->hw.queues;
317 if (iftype == NL80211_IFTYPE_NAN)
320 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
321 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
323 IEEE80211_INVAL_HW_QUEUE))
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
331 if ((iftype != NL80211_IFTYPE_AP &&
332 iftype != NL80211_IFTYPE_P2P_GO &&
333 iftype != NL80211_IFTYPE_MESH_POINT) ||
334 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
335 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
339 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
342 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
348 static int ieee80211_open(struct net_device *dev)
350 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
353 /* fail early if user set an invalid address */
354 if (!is_valid_ether_addr(dev->dev_addr))
355 return -EADDRNOTAVAIL;
357 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
361 wiphy_lock(sdata->local->hw.wiphy);
362 err = ieee80211_do_open(&sdata->wdev, true);
363 wiphy_unlock(sdata->local->hw.wiphy);
368 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
370 struct ieee80211_local *local = sdata->local;
372 struct sk_buff *skb, *tmp;
373 u32 hw_reconf_flags = 0;
376 struct cfg80211_chan_def chandef;
378 struct cfg80211_nan_func *func;
380 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
382 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
384 ieee80211_scan_cancel(local);
387 * Stop TX on this interface first.
390 netif_tx_stop_all_queues(sdata->dev);
392 ieee80211_roc_purge(local, sdata);
394 switch (sdata->vif.type) {
395 case NL80211_IFTYPE_STATION:
396 ieee80211_mgd_stop(sdata);
398 case NL80211_IFTYPE_ADHOC:
399 ieee80211_ibss_stop(sdata);
401 case NL80211_IFTYPE_MONITOR:
402 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
404 list_del_rcu(&sdata->u.mntr.list);
411 * Remove all stations associated with this interface.
413 * This must be done before calling ops->remove_interface()
414 * because otherwise we can later invoke ops->sta_notify()
415 * whenever the STAs are removed, and that invalidates driver
416 * assumptions about always getting a vif pointer that is valid
417 * (because if we remove a STA after ops->remove_interface()
418 * the driver will have removed the vif info already!)
420 * For AP_VLANs stations may exist since there's nothing else that
421 * would have removed them, but in other modes there shouldn't
424 flushed = sta_info_flush(sdata);
425 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
427 /* don't count this interface for allmulti while it is down */
428 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
429 atomic_dec(&local->iff_allmultis);
431 if (sdata->vif.type == NL80211_IFTYPE_AP) {
433 local->fif_probe_req--;
434 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
435 local->fif_probe_req--;
439 netif_addr_lock_bh(sdata->dev);
440 spin_lock_bh(&local->filter_lock);
441 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
442 sdata->dev->addr_len);
443 spin_unlock_bh(&local->filter_lock);
444 netif_addr_unlock_bh(sdata->dev);
447 del_timer_sync(&local->dynamic_ps_timer);
448 cancel_work_sync(&local->dynamic_ps_enable_work);
450 cancel_work_sync(&sdata->recalc_smps);
452 mutex_lock(&local->mtx);
453 sdata->vif.csa_active = false;
454 if (sdata->vif.type == NL80211_IFTYPE_STATION)
455 sdata->u.mgd.csa_waiting_bcn = false;
456 if (sdata->csa_block_tx) {
457 ieee80211_wake_vif_queues(local, sdata,
458 IEEE80211_QUEUE_STOP_REASON_CSA);
459 sdata->csa_block_tx = false;
461 mutex_unlock(&local->mtx);
464 cancel_work_sync(&sdata->csa_finalize_work);
465 cancel_work_sync(&sdata->color_change_finalize_work);
467 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
469 if (sdata->wdev.cac_started) {
470 chandef = sdata->vif.bss_conf.chandef;
471 WARN_ON(local->suspended);
472 mutex_lock(&local->mtx);
473 ieee80211_vif_release_channel(sdata);
474 mutex_unlock(&local->mtx);
475 cfg80211_cac_event(sdata->dev, &chandef,
476 NL80211_RADAR_CAC_ABORTED,
480 if (sdata->vif.type == NL80211_IFTYPE_AP) {
481 WARN_ON(!list_empty(&sdata->u.ap.vlans));
482 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
483 /* remove all packets in parent bc_buf pointing to this dev */
484 ps = &sdata->bss->ps;
486 spin_lock_irqsave(&ps->bc_buf.lock, flags);
487 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
488 if (skb->dev == sdata->dev) {
489 __skb_unlink(skb, &ps->bc_buf);
490 local->total_ps_buffered--;
491 ieee80211_free_txskb(&local->hw, skb);
494 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
500 switch (sdata->vif.type) {
501 case NL80211_IFTYPE_AP_VLAN:
502 mutex_lock(&local->mtx);
503 list_del(&sdata->u.vlan.list);
504 mutex_unlock(&local->mtx);
505 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
506 /* see comment in the default case below */
507 ieee80211_free_keys(sdata, true);
508 /* no need to tell driver */
510 case NL80211_IFTYPE_MONITOR:
511 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
512 local->cooked_mntrs--;
517 if (local->monitors == 0) {
518 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
519 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
522 ieee80211_adjust_monitor_flags(sdata, -1);
524 case NL80211_IFTYPE_NAN:
525 /* clean all the functions */
526 spin_lock_bh(&sdata->u.nan.func_lock);
528 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
529 idr_remove(&sdata->u.nan.function_inst_ids, i);
530 cfg80211_free_nan_func(func);
532 idr_destroy(&sdata->u.nan.function_inst_ids);
534 spin_unlock_bh(&sdata->u.nan.func_lock);
536 case NL80211_IFTYPE_P2P_DEVICE:
537 /* relies on synchronize_rcu() below */
538 RCU_INIT_POINTER(local->p2p_sdata, NULL);
541 cancel_work_sync(&sdata->work);
543 * When we get here, the interface is marked down.
544 * Free the remaining keys, if there are any
545 * (which can happen in AP mode if userspace sets
546 * keys before the interface is operating)
548 * Force the key freeing to always synchronize_net()
549 * to wait for the RX path in case it is using this
550 * interface enqueuing frames at this very time on
553 ieee80211_free_keys(sdata, true);
554 skb_queue_purge(&sdata->skb_queue);
555 skb_queue_purge(&sdata->status_queue);
558 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
559 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
560 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
561 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
562 if (info->control.vif == &sdata->vif) {
563 __skb_unlink(skb, &local->pending[i]);
564 ieee80211_free_txskb(&local->hw, skb);
568 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
570 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
571 ieee80211_txq_remove_vlan(local, sdata);
575 if (local->open_count == 0)
576 ieee80211_clear_tx_pending(local);
578 sdata->vif.bss_conf.beacon_int = 0;
581 * If the interface goes down while suspended, presumably because
582 * the device was unplugged and that happens before our resume,
583 * then the driver is already unconfigured and the remainder of
584 * this function isn't needed.
585 * XXX: what about WoWLAN? If the device has software state, e.g.
586 * memory allocated, it might expect teardown commands from
589 if (local->suspended) {
590 WARN_ON(local->wowlan);
591 WARN_ON(rcu_access_pointer(local->monitor_sdata));
595 switch (sdata->vif.type) {
596 case NL80211_IFTYPE_AP_VLAN:
598 case NL80211_IFTYPE_MONITOR:
599 if (local->monitors == 0)
600 ieee80211_del_virtual_monitor(local);
602 mutex_lock(&local->mtx);
603 ieee80211_recalc_idle(local);
604 mutex_unlock(&local->mtx);
606 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
612 drv_remove_interface(local, sdata);
615 ieee80211_recalc_ps(local);
618 flush_delayed_work(&local->scan_work);
620 if (local->open_count == 0) {
621 ieee80211_stop_device(local);
623 /* no reconfiguring after stop! */
627 /* do after stop to avoid reconfiguring when we stop anyway */
628 ieee80211_configure_filter(local);
629 ieee80211_hw_config(local, hw_reconf_flags);
631 if (local->monitors == local->open_count)
632 ieee80211_add_virtual_monitor(local);
635 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
637 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
638 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
643 tx_sdata = vif_to_sdata(tx_vif);
644 sdata->vif.mbssid_tx_vif = NULL;
646 list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
647 &tx_sdata->local->interfaces, list) {
648 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
649 non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
650 ieee80211_sdata_running(non_tx_sdata)) {
651 non_tx_sdata->vif.mbssid_tx_vif = NULL;
652 dev_close(non_tx_sdata->wdev.netdev);
656 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
657 tx_sdata->vif.mbssid_tx_vif = NULL;
658 dev_close(tx_sdata->wdev.netdev);
662 static int ieee80211_stop(struct net_device *dev)
664 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
666 /* close dependent VLAN and MBSSID interfaces before locking wiphy */
667 if (sdata->vif.type == NL80211_IFTYPE_AP) {
668 struct ieee80211_sub_if_data *vlan, *tmpsdata;
670 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
672 dev_close(vlan->dev);
674 ieee80211_stop_mbssid(sdata);
677 wiphy_lock(sdata->local->hw.wiphy);
678 ieee80211_do_stop(sdata, true);
679 wiphy_unlock(sdata->local->hw.wiphy);
684 static void ieee80211_set_multicast_list(struct net_device *dev)
686 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
687 struct ieee80211_local *local = sdata->local;
688 int allmulti, sdata_allmulti;
690 allmulti = !!(dev->flags & IFF_ALLMULTI);
691 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
693 if (allmulti != sdata_allmulti) {
694 if (dev->flags & IFF_ALLMULTI)
695 atomic_inc(&local->iff_allmultis);
697 atomic_dec(&local->iff_allmultis);
698 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
701 spin_lock_bh(&local->filter_lock);
702 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
703 spin_unlock_bh(&local->filter_lock);
704 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
708 * Called when the netdev is removed or, by the code below, before
709 * the interface type changes.
711 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
713 /* free extra data */
714 ieee80211_free_keys(sdata, false);
716 ieee80211_debugfs_remove_netdev(sdata);
718 ieee80211_destroy_frag_cache(&sdata->frags);
720 if (ieee80211_vif_is_mesh(&sdata->vif))
721 ieee80211_mesh_teardown_sdata(sdata);
724 static void ieee80211_uninit(struct net_device *dev)
726 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
729 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
731 struct net_device *sb_dev)
733 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
737 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
739 dev_fetch_sw_netstats(stats, dev->tstats);
742 static const struct net_device_ops ieee80211_dataif_ops = {
743 .ndo_open = ieee80211_open,
744 .ndo_stop = ieee80211_stop,
745 .ndo_uninit = ieee80211_uninit,
746 .ndo_start_xmit = ieee80211_subif_start_xmit,
747 .ndo_set_rx_mode = ieee80211_set_multicast_list,
748 .ndo_set_mac_address = ieee80211_change_mac,
749 .ndo_select_queue = ieee80211_netdev_select_queue,
750 .ndo_get_stats64 = ieee80211_get_stats64,
753 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
755 struct net_device *sb_dev)
757 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
758 struct ieee80211_local *local = sdata->local;
759 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
760 struct ieee80211_hdr *hdr;
763 if (local->hw.queues < IEEE80211_NUM_ACS)
766 /* reset flags and info before parsing radiotap header */
767 memset(info, 0, sizeof(*info));
769 if (!ieee80211_parse_tx_radiotap(skb, dev))
770 return 0; /* doesn't matter, frame will be dropped */
772 len_rthdr = ieee80211_get_radiotap_len(skb->data);
773 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
774 if (skb->len < len_rthdr + 2 ||
775 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
776 return 0; /* doesn't matter, frame will be dropped */
778 return ieee80211_select_queue_80211(sdata, skb, hdr);
781 static const struct net_device_ops ieee80211_monitorif_ops = {
782 .ndo_open = ieee80211_open,
783 .ndo_stop = ieee80211_stop,
784 .ndo_uninit = ieee80211_uninit,
785 .ndo_start_xmit = ieee80211_monitor_start_xmit,
786 .ndo_set_rx_mode = ieee80211_set_multicast_list,
787 .ndo_set_mac_address = ieee80211_change_mac,
788 .ndo_select_queue = ieee80211_monitor_select_queue,
789 .ndo_get_stats64 = ieee80211_get_stats64,
792 static const struct net_device_ops ieee80211_dataif_8023_ops = {
793 .ndo_open = ieee80211_open,
794 .ndo_stop = ieee80211_stop,
795 .ndo_uninit = ieee80211_uninit,
796 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
797 .ndo_set_rx_mode = ieee80211_set_multicast_list,
798 .ndo_set_mac_address = ieee80211_change_mac,
799 .ndo_select_queue = ieee80211_netdev_select_queue,
800 .ndo_get_stats64 = ieee80211_get_stats64,
803 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
806 /* P2P GO and client are mapped to AP/STATION types */
807 case NL80211_IFTYPE_AP:
808 case NL80211_IFTYPE_STATION:
815 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
817 struct ieee80211_local *local = sdata->local;
820 flags = sdata->vif.offload_flags;
822 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
823 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
824 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
826 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
827 local->hw.wiphy->frag_threshold != (u32)-1)
828 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
831 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
833 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
836 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
837 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
838 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
840 if (local->monitors &&
841 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
842 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
844 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
847 if (sdata->vif.offload_flags == flags)
850 sdata->vif.offload_flags = flags;
851 ieee80211_check_fast_rx_iface(sdata);
855 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
857 struct ieee80211_local *local = sdata->local;
858 struct ieee80211_sub_if_data *bss = sdata;
861 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
865 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
868 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
869 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
872 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
873 if (sdata->wdev.use_4addr &&
874 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
877 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
878 &ieee80211_dataif_ops;
881 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
883 struct ieee80211_local *local = sdata->local;
884 struct ieee80211_sub_if_data *vsdata;
886 if (ieee80211_set_sdata_offload_flags(sdata)) {
887 drv_update_vif_offload(local, sdata);
888 ieee80211_set_vif_encap_ops(sdata);
891 list_for_each_entry(vsdata, &local->interfaces, list) {
892 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
893 vsdata->bss != &sdata->u.ap)
896 ieee80211_set_vif_encap_ops(vsdata);
900 void ieee80211_recalc_offload(struct ieee80211_local *local)
902 struct ieee80211_sub_if_data *sdata;
904 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
907 mutex_lock(&local->iflist_mtx);
909 list_for_each_entry(sdata, &local->interfaces, list) {
910 if (!ieee80211_sdata_running(sdata))
913 ieee80211_recalc_sdata_offload(sdata);
916 mutex_unlock(&local->iflist_mtx);
919 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
922 struct ieee80211_local *local = sdata->local;
923 u32 flags = sdata->u.mntr.flags;
925 #define ADJUST(_f, _s) do { \
926 if (flags & MONITOR_FLAG_##_f) \
927 local->fif_##_s += offset; \
930 ADJUST(FCSFAIL, fcsfail);
931 ADJUST(PLCPFAIL, plcpfail);
932 ADJUST(CONTROL, control);
933 ADJUST(CONTROL, pspoll);
934 ADJUST(OTHER_BSS, other_bss);
939 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
941 struct ieee80211_local *local = sdata->local;
944 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
945 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
946 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
947 else if (local->hw.queues >= IEEE80211_NUM_ACS)
948 sdata->vif.hw_queue[i] = i;
950 sdata->vif.hw_queue[i] = 0;
952 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
955 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
957 struct ieee80211_sub_if_data *sdata;
960 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
964 lockdep_assert_wiphy(local->hw.wiphy);
966 if (local->monitor_sdata)
969 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
974 sdata->local = local;
975 sdata->vif.type = NL80211_IFTYPE_MONITOR;
976 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
977 wiphy_name(local->hw.wiphy));
978 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
980 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
982 ieee80211_set_default_queues(sdata);
984 ret = drv_add_interface(local, sdata);
986 /* ok .. stupid driver, it asked for this! */
991 set_bit(SDATA_STATE_RUNNING, &sdata->state);
993 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
999 mutex_lock(&local->iflist_mtx);
1000 rcu_assign_pointer(local->monitor_sdata, sdata);
1001 mutex_unlock(&local->iflist_mtx);
1003 mutex_lock(&local->mtx);
1004 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
1005 IEEE80211_CHANCTX_EXCLUSIVE);
1006 mutex_unlock(&local->mtx);
1008 mutex_lock(&local->iflist_mtx);
1009 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1010 mutex_unlock(&local->iflist_mtx);
1012 drv_remove_interface(local, sdata);
1017 skb_queue_head_init(&sdata->skb_queue);
1018 skb_queue_head_init(&sdata->status_queue);
1019 INIT_WORK(&sdata->work, ieee80211_iface_work);
1024 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1026 struct ieee80211_sub_if_data *sdata;
1028 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1032 lockdep_assert_wiphy(local->hw.wiphy);
1034 mutex_lock(&local->iflist_mtx);
1036 sdata = rcu_dereference_protected(local->monitor_sdata,
1037 lockdep_is_held(&local->iflist_mtx));
1039 mutex_unlock(&local->iflist_mtx);
1043 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1044 mutex_unlock(&local->iflist_mtx);
1048 mutex_lock(&local->mtx);
1049 ieee80211_vif_release_channel(sdata);
1050 mutex_unlock(&local->mtx);
1052 drv_remove_interface(local, sdata);
1058 * NOTE: Be very careful when changing this function, it must NOT return
1059 * an error on interface type changes that have been pre-checked, so most
1060 * checks should be in ieee80211_check_concurrent_iface.
1062 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1064 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1065 struct net_device *dev = wdev->netdev;
1066 struct ieee80211_local *local = sdata->local;
1069 u32 hw_reconf_flags = 0;
1071 switch (sdata->vif.type) {
1072 case NL80211_IFTYPE_AP_VLAN: {
1073 struct ieee80211_sub_if_data *master;
1078 mutex_lock(&local->mtx);
1079 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1080 mutex_unlock(&local->mtx);
1082 master = container_of(sdata->bss,
1083 struct ieee80211_sub_if_data, u.ap);
1084 sdata->control_port_protocol =
1085 master->control_port_protocol;
1086 sdata->control_port_no_encrypt =
1087 master->control_port_no_encrypt;
1088 sdata->control_port_over_nl80211 =
1089 master->control_port_over_nl80211;
1090 sdata->control_port_no_preauth =
1091 master->control_port_no_preauth;
1092 sdata->vif.cab_queue = master->vif.cab_queue;
1093 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1094 sizeof(sdata->vif.hw_queue));
1095 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1097 mutex_lock(&local->key_mtx);
1098 sdata->crypto_tx_tailroom_needed_cnt +=
1099 master->crypto_tx_tailroom_needed_cnt;
1100 mutex_unlock(&local->key_mtx);
1104 case NL80211_IFTYPE_AP:
1105 sdata->bss = &sdata->u.ap;
1107 case NL80211_IFTYPE_MESH_POINT:
1108 case NL80211_IFTYPE_STATION:
1109 case NL80211_IFTYPE_MONITOR:
1110 case NL80211_IFTYPE_ADHOC:
1111 case NL80211_IFTYPE_P2P_DEVICE:
1112 case NL80211_IFTYPE_OCB:
1113 case NL80211_IFTYPE_NAN:
1114 /* no special treatment */
1116 case NL80211_IFTYPE_UNSPECIFIED:
1117 case NUM_NL80211_IFTYPES:
1118 case NL80211_IFTYPE_P2P_CLIENT:
1119 case NL80211_IFTYPE_P2P_GO:
1120 case NL80211_IFTYPE_WDS:
1126 if (local->open_count == 0) {
1127 res = drv_start(local);
1130 /* we're brought up, everything changes */
1131 hw_reconf_flags = ~0;
1132 ieee80211_led_radio(local, true);
1133 ieee80211_mod_tpt_led_trig(local,
1134 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1138 * Copy the hopefully now-present MAC address to
1139 * this interface, if it has the special null one.
1141 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1142 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1143 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1145 if (!is_valid_ether_addr(dev->dev_addr)) {
1146 res = -EADDRNOTAVAIL;
1151 switch (sdata->vif.type) {
1152 case NL80211_IFTYPE_AP_VLAN:
1153 /* no need to tell driver, but set carrier and chanctx */
1154 if (rtnl_dereference(sdata->bss->beacon)) {
1155 ieee80211_vif_vlan_copy_chanctx(sdata);
1156 netif_carrier_on(dev);
1157 ieee80211_set_vif_encap_ops(sdata);
1159 netif_carrier_off(dev);
1162 case NL80211_IFTYPE_MONITOR:
1163 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1164 local->cooked_mntrs++;
1168 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1169 res = drv_add_interface(local, sdata);
1172 } else if (local->monitors == 0 && local->open_count == 0) {
1173 res = ieee80211_add_virtual_monitor(local);
1178 /* must be before the call to ieee80211_configure_filter */
1180 if (local->monitors == 1) {
1181 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1182 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1185 ieee80211_adjust_monitor_flags(sdata, 1);
1186 ieee80211_configure_filter(local);
1187 ieee80211_recalc_offload(local);
1188 mutex_lock(&local->mtx);
1189 ieee80211_recalc_idle(local);
1190 mutex_unlock(&local->mtx);
1192 netif_carrier_on(dev);
1196 ieee80211_del_virtual_monitor(local);
1197 ieee80211_set_sdata_offload_flags(sdata);
1199 res = drv_add_interface(local, sdata);
1203 ieee80211_set_vif_encap_ops(sdata);
1204 res = ieee80211_check_queues(sdata,
1205 ieee80211_vif_type_p2p(&sdata->vif));
1207 goto err_del_interface;
1210 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1211 local->fif_pspoll++;
1212 local->fif_probe_req++;
1214 ieee80211_configure_filter(local);
1215 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1216 local->fif_probe_req++;
1219 if (sdata->vif.probe_req_reg)
1220 drv_config_iface_filter(local, sdata,
1224 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1225 sdata->vif.type != NL80211_IFTYPE_NAN)
1226 changed |= ieee80211_reset_erp_info(sdata);
1227 ieee80211_bss_info_change_notify(sdata, changed);
1229 switch (sdata->vif.type) {
1230 case NL80211_IFTYPE_STATION:
1231 case NL80211_IFTYPE_ADHOC:
1232 case NL80211_IFTYPE_AP:
1233 case NL80211_IFTYPE_MESH_POINT:
1234 case NL80211_IFTYPE_OCB:
1235 netif_carrier_off(dev);
1237 case NL80211_IFTYPE_P2P_DEVICE:
1238 case NL80211_IFTYPE_NAN:
1246 * Set default queue parameters so drivers don't
1247 * need to initialise the hardware if the hardware
1248 * doesn't start up with sane defaults.
1249 * Enable QoS for anything but station interfaces.
1251 ieee80211_set_wmm_default(sdata, true,
1252 sdata->vif.type != NL80211_IFTYPE_STATION);
1255 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1257 switch (sdata->vif.type) {
1258 case NL80211_IFTYPE_P2P_DEVICE:
1259 rcu_assign_pointer(local->p2p_sdata, sdata);
1261 case NL80211_IFTYPE_MONITOR:
1262 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1264 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1271 * set_multicast_list will be invoked by the networking core
1272 * which will check whether any increments here were done in
1273 * error and sync them down to the hardware as filter flags.
1275 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1276 atomic_inc(&local->iff_allmultis);
1279 local->open_count++;
1281 if (hw_reconf_flags)
1282 ieee80211_hw_config(local, hw_reconf_flags);
1284 ieee80211_recalc_ps(local);
1286 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1287 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1288 local->ops->wake_tx_queue) {
1289 /* XXX: for AP_VLAN, actually track AP queues */
1291 netif_tx_start_all_queues(dev);
1293 unsigned long flags;
1294 int n_acs = IEEE80211_NUM_ACS;
1297 if (local->hw.queues < IEEE80211_NUM_ACS)
1300 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1301 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1302 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1303 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1304 for (ac = 0; ac < n_acs; ac++) {
1305 int ac_queue = sdata->vif.hw_queue[ac];
1307 if (local->queue_stop_reasons[ac_queue] == 0 &&
1308 skb_queue_empty(&local->pending[ac_queue]))
1309 netif_start_subqueue(dev, ac);
1312 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1317 drv_remove_interface(local, sdata);
1319 if (!local->open_count)
1323 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1324 mutex_lock(&local->mtx);
1325 list_del(&sdata->u.vlan.list);
1326 mutex_unlock(&local->mtx);
1328 /* might already be clear but that doesn't matter */
1329 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1333 static void ieee80211_if_free(struct net_device *dev)
1335 free_percpu(dev->tstats);
1338 static void ieee80211_if_setup(struct net_device *dev)
1341 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1342 dev->netdev_ops = &ieee80211_dataif_ops;
1343 dev->needs_free_netdev = true;
1344 dev->priv_destructor = ieee80211_if_free;
1347 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1349 ieee80211_if_setup(dev);
1350 dev->priv_flags |= IFF_NO_QUEUE;
1353 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1354 struct ieee80211_sub_if_data *sdata,
1355 struct sk_buff *skb)
1357 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1359 if (ieee80211_is_action(mgmt->frame_control) &&
1360 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1361 struct sta_info *sta;
1364 mutex_lock(&local->sta_mtx);
1365 sta = sta_info_get_bss(sdata, mgmt->sa);
1367 switch (mgmt->u.action.u.addba_req.action_code) {
1368 case WLAN_ACTION_ADDBA_REQ:
1369 ieee80211_process_addba_request(local, sta,
1372 case WLAN_ACTION_ADDBA_RESP:
1373 ieee80211_process_addba_resp(local, sta,
1376 case WLAN_ACTION_DELBA:
1377 ieee80211_process_delba(sdata, sta,
1385 mutex_unlock(&local->sta_mtx);
1386 } else if (ieee80211_is_action(mgmt->frame_control) &&
1387 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1388 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1389 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1390 struct ieee80211_rx_status *status;
1391 enum nl80211_band band;
1392 struct sta_info *sta;
1395 status = IEEE80211_SKB_RXCB(skb);
1396 band = status->band;
1397 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1399 mutex_lock(&local->sta_mtx);
1400 sta = sta_info_get_bss(sdata, mgmt->sa);
1403 ieee80211_vht_handle_opmode(sdata, sta, opmode,
1406 mutex_unlock(&local->sta_mtx);
1409 case WLAN_VHT_ACTION_GROUPID_MGMT:
1410 ieee80211_process_mu_groups(sdata, mgmt);
1416 } else if (ieee80211_is_action(mgmt->frame_control) &&
1417 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1418 switch (mgmt->u.action.u.s1g.action_code) {
1419 case WLAN_S1G_TWT_TEARDOWN:
1420 case WLAN_S1G_TWT_SETUP:
1421 ieee80211_s1g_rx_twt_action(sdata, skb);
1426 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1427 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1428 ieee80211_sta_rx_queued_ext(sdata, skb);
1431 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1432 struct ieee80211_hdr *hdr = (void *)mgmt;
1433 struct sta_info *sta;
1436 * So the frame isn't mgmt, but frame_control
1437 * is at the right place anyway, of course, so
1438 * the if statement is correct.
1440 * Warn if we have other data frame types here,
1441 * they must not get here.
1443 WARN_ON(hdr->frame_control &
1444 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1445 WARN_ON(!(hdr->seq_ctrl &
1446 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1448 * This was a fragment of a frame, received while
1449 * a block-ack session was active. That cannot be
1450 * right, so terminate the session.
1452 mutex_lock(&local->sta_mtx);
1453 sta = sta_info_get_bss(sdata, mgmt->sa);
1455 u16 tid = ieee80211_get_tid(hdr);
1457 __ieee80211_stop_rx_ba_session(
1458 sta, tid, WLAN_BACK_RECIPIENT,
1459 WLAN_REASON_QSTA_REQUIRE_SETUP,
1462 mutex_unlock(&local->sta_mtx);
1463 } else switch (sdata->vif.type) {
1464 case NL80211_IFTYPE_STATION:
1465 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1467 case NL80211_IFTYPE_ADHOC:
1468 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1470 case NL80211_IFTYPE_MESH_POINT:
1471 if (!ieee80211_vif_is_mesh(&sdata->vif))
1473 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1476 WARN(1, "frame for unexpected interface type");
1481 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1482 struct sk_buff *skb)
1484 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1486 if (ieee80211_is_action(mgmt->frame_control) &&
1487 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1488 switch (mgmt->u.action.u.s1g.action_code) {
1489 case WLAN_S1G_TWT_TEARDOWN:
1490 case WLAN_S1G_TWT_SETUP:
1491 ieee80211_s1g_status_twt_action(sdata, skb);
1499 static void ieee80211_iface_work(struct work_struct *work)
1501 struct ieee80211_sub_if_data *sdata =
1502 container_of(work, struct ieee80211_sub_if_data, work);
1503 struct ieee80211_local *local = sdata->local;
1504 struct sk_buff *skb;
1506 if (!ieee80211_sdata_running(sdata))
1509 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1512 if (!ieee80211_can_run_worker(local))
1515 /* first process frames */
1516 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1517 kcov_remote_start_common(skb_get_kcov_handle(skb));
1519 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1520 ieee80211_process_tdls_channel_switch(sdata, skb);
1522 ieee80211_iface_process_skb(local, sdata, skb);
1528 /* process status queue */
1529 while ((skb = skb_dequeue(&sdata->status_queue))) {
1530 kcov_remote_start_common(skb_get_kcov_handle(skb));
1532 ieee80211_iface_process_status(sdata, skb);
1538 /* then other type-dependent work */
1539 switch (sdata->vif.type) {
1540 case NL80211_IFTYPE_STATION:
1541 ieee80211_sta_work(sdata);
1543 case NL80211_IFTYPE_ADHOC:
1544 ieee80211_ibss_work(sdata);
1546 case NL80211_IFTYPE_MESH_POINT:
1547 if (!ieee80211_vif_is_mesh(&sdata->vif))
1549 ieee80211_mesh_work(sdata);
1551 case NL80211_IFTYPE_OCB:
1552 ieee80211_ocb_work(sdata);
1559 static void ieee80211_recalc_smps_work(struct work_struct *work)
1561 struct ieee80211_sub_if_data *sdata =
1562 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1564 ieee80211_recalc_smps(sdata);
1568 * Helper function to initialise an interface to a specific type.
1570 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1571 enum nl80211_iftype type)
1573 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1576 /* clear type-dependent union */
1577 memset(&sdata->u, 0, sizeof(sdata->u));
1579 /* and set some type-dependent values */
1580 sdata->vif.type = type;
1581 sdata->vif.p2p = false;
1582 sdata->wdev.iftype = type;
1584 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1585 sdata->control_port_no_encrypt = false;
1586 sdata->control_port_over_nl80211 = false;
1587 sdata->control_port_no_preauth = false;
1588 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1589 sdata->vif.bss_conf.idle = true;
1590 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1592 sdata->noack_map = 0;
1594 /* only monitor/p2p-device differ */
1596 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1597 sdata->dev->type = ARPHRD_ETHER;
1600 skb_queue_head_init(&sdata->skb_queue);
1601 skb_queue_head_init(&sdata->status_queue);
1602 INIT_WORK(&sdata->work, ieee80211_iface_work);
1603 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1604 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1605 INIT_WORK(&sdata->color_change_finalize_work, ieee80211_color_change_finalize_work);
1606 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1607 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1610 case NL80211_IFTYPE_P2P_GO:
1611 type = NL80211_IFTYPE_AP;
1612 sdata->vif.type = type;
1613 sdata->vif.p2p = true;
1615 case NL80211_IFTYPE_AP:
1616 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1617 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1618 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1620 case NL80211_IFTYPE_P2P_CLIENT:
1621 type = NL80211_IFTYPE_STATION;
1622 sdata->vif.type = type;
1623 sdata->vif.p2p = true;
1625 case NL80211_IFTYPE_STATION:
1626 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1627 ieee80211_sta_setup_sdata(sdata);
1629 case NL80211_IFTYPE_OCB:
1630 sdata->vif.bss_conf.bssid = bssid_wildcard;
1631 ieee80211_ocb_setup_sdata(sdata);
1633 case NL80211_IFTYPE_ADHOC:
1634 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1635 ieee80211_ibss_setup_sdata(sdata);
1637 case NL80211_IFTYPE_MESH_POINT:
1638 if (ieee80211_vif_is_mesh(&sdata->vif))
1639 ieee80211_mesh_init_sdata(sdata);
1641 case NL80211_IFTYPE_MONITOR:
1642 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1643 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1644 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1645 MONITOR_FLAG_OTHER_BSS;
1647 case NL80211_IFTYPE_NAN:
1648 idr_init(&sdata->u.nan.function_inst_ids);
1649 spin_lock_init(&sdata->u.nan.func_lock);
1650 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1652 case NL80211_IFTYPE_AP_VLAN:
1653 case NL80211_IFTYPE_P2P_DEVICE:
1654 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1656 case NL80211_IFTYPE_UNSPECIFIED:
1657 case NL80211_IFTYPE_WDS:
1658 case NUM_NL80211_IFTYPES:
1663 ieee80211_debugfs_add_netdev(sdata);
1666 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1667 enum nl80211_iftype type)
1669 struct ieee80211_local *local = sdata->local;
1671 enum nl80211_iftype internal_type = type;
1676 if (!local->ops->change_interface)
1679 switch (sdata->vif.type) {
1680 case NL80211_IFTYPE_AP:
1681 if (!list_empty(&sdata->u.ap.vlans))
1684 case NL80211_IFTYPE_STATION:
1685 case NL80211_IFTYPE_ADHOC:
1686 case NL80211_IFTYPE_OCB:
1688 * Could maybe also all others here?
1689 * Just not sure how that interacts
1690 * with the RX/config path e.g. for
1699 case NL80211_IFTYPE_AP:
1700 case NL80211_IFTYPE_STATION:
1701 case NL80211_IFTYPE_ADHOC:
1702 case NL80211_IFTYPE_OCB:
1704 * Could probably support everything
1708 case NL80211_IFTYPE_P2P_CLIENT:
1710 internal_type = NL80211_IFTYPE_STATION;
1712 case NL80211_IFTYPE_P2P_GO:
1714 internal_type = NL80211_IFTYPE_AP;
1720 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1724 ieee80211_stop_vif_queues(local, sdata,
1725 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1728 ieee80211_do_stop(sdata, false);
1730 ieee80211_teardown_sdata(sdata);
1732 ieee80211_set_sdata_offload_flags(sdata);
1733 ret = drv_change_interface(local, sdata, internal_type, p2p);
1735 type = ieee80211_vif_type_p2p(&sdata->vif);
1738 * Ignore return value here, there's not much we can do since
1739 * the driver changed the interface type internally already.
1740 * The warnings will hopefully make driver authors fix it :-)
1742 ieee80211_check_queues(sdata, type);
1744 ieee80211_setup_sdata(sdata, type);
1745 ieee80211_set_vif_encap_ops(sdata);
1747 err = ieee80211_do_open(&sdata->wdev, false);
1748 WARN(err, "type change: do_open returned %d", err);
1750 ieee80211_wake_vif_queues(local, sdata,
1751 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1755 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1756 enum nl80211_iftype type)
1762 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1765 if (ieee80211_sdata_running(sdata)) {
1766 ret = ieee80211_runtime_change_iftype(sdata, type);
1770 /* Purge and reset type-dependent state. */
1771 ieee80211_teardown_sdata(sdata);
1772 ieee80211_setup_sdata(sdata, type);
1775 /* reset some values that shouldn't be kept across type changes */
1776 if (type == NL80211_IFTYPE_STATION)
1777 sdata->u.mgd.use_4addr = false;
1782 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1783 u8 *perm_addr, enum nl80211_iftype type)
1785 struct ieee80211_sub_if_data *sdata;
1786 u64 mask, start, addr, val, inc;
1788 u8 tmp_addr[ETH_ALEN];
1791 /* default ... something at least */
1792 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1794 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1795 local->hw.wiphy->n_addresses <= 1)
1798 mutex_lock(&local->iflist_mtx);
1801 case NL80211_IFTYPE_MONITOR:
1802 /* doesn't matter */
1804 case NL80211_IFTYPE_AP_VLAN:
1805 /* match up with an AP interface */
1806 list_for_each_entry(sdata, &local->interfaces, list) {
1807 if (sdata->vif.type != NL80211_IFTYPE_AP)
1809 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1812 /* keep default if no AP interface present */
1814 case NL80211_IFTYPE_P2P_CLIENT:
1815 case NL80211_IFTYPE_P2P_GO:
1816 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1817 list_for_each_entry(sdata, &local->interfaces, list) {
1818 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1820 if (!ieee80211_sdata_running(sdata))
1822 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1828 /* assign a new address if possible -- try n_addresses first */
1829 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1832 list_for_each_entry(sdata, &local->interfaces, list) {
1833 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1842 local->hw.wiphy->addresses[i].addr,
1848 /* try mask if available */
1849 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1852 m = local->hw.wiphy->addr_mask;
1853 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1854 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1855 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1857 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1858 /* not a contiguous mask ... not handled now! */
1859 pr_info("not contiguous\n");
1864 * Pick address of existing interface in case user changed
1865 * MAC address manually, default to perm_addr.
1867 m = local->hw.wiphy->perm_addr;
1868 list_for_each_entry(sdata, &local->interfaces, list) {
1869 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1871 m = sdata->vif.addr;
1874 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1875 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1876 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1878 inc = 1ULL<<__ffs64(mask);
1879 val = (start & mask);
1880 addr = (start & ~mask) | (val & mask);
1884 tmp_addr[5] = addr >> 0*8;
1885 tmp_addr[4] = addr >> 1*8;
1886 tmp_addr[3] = addr >> 2*8;
1887 tmp_addr[2] = addr >> 3*8;
1888 tmp_addr[1] = addr >> 4*8;
1889 tmp_addr[0] = addr >> 5*8;
1893 list_for_each_entry(sdata, &local->interfaces, list) {
1894 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1901 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1904 addr = (start & ~mask) | (val & mask);
1905 } while (addr != start);
1911 mutex_unlock(&local->iflist_mtx);
1914 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1915 unsigned char name_assign_type,
1916 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1917 struct vif_params *params)
1919 struct net_device *ndev = NULL;
1920 struct ieee80211_sub_if_data *sdata = NULL;
1921 struct txq_info *txqi;
1922 void (*if_setup)(struct net_device *dev);
1928 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1929 struct wireless_dev *wdev;
1931 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1935 wdev = &sdata->wdev;
1938 strlcpy(sdata->name, name, IFNAMSIZ);
1939 ieee80211_assign_perm_addr(local, wdev->address, type);
1940 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1942 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1946 if (local->ops->wake_tx_queue &&
1947 type != NL80211_IFTYPE_AP_VLAN &&
1948 (type != NL80211_IFTYPE_MONITOR ||
1949 (params->flags & MONITOR_FLAG_ACTIVE)))
1950 txq_size += sizeof(struct txq_info) +
1951 local->hw.txq_data_size;
1953 if (local->ops->wake_tx_queue) {
1954 if_setup = ieee80211_if_setup_no_queue;
1956 if_setup = ieee80211_if_setup;
1957 if (local->hw.queues >= IEEE80211_NUM_ACS)
1958 txqs = IEEE80211_NUM_ACS;
1961 ndev = alloc_netdev_mqs(size + txq_size,
1962 name, name_assign_type,
1967 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1968 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1970 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1972 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1973 if (!ndev->tstats) {
1978 ndev->needed_headroom = local->tx_headroom +
1979 4*6 /* four MAC addresses */
1980 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1982 + 8 /* rfc1042/bridge tunnel */
1983 - ETH_HLEN /* ethernet hard_header_len */
1984 + IEEE80211_ENCRYPT_HEADROOM;
1985 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1987 ret = dev_alloc_name(ndev, ndev->name);
1989 ieee80211_if_free(ndev);
1994 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1995 if (is_valid_ether_addr(params->macaddr))
1996 eth_hw_addr_set(ndev, params->macaddr);
1998 eth_hw_addr_set(ndev, ndev->perm_addr);
1999 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2001 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2002 sdata = netdev_priv(ndev);
2003 ndev->ieee80211_ptr = &sdata->wdev;
2004 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2005 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2008 txqi = netdev_priv(ndev) + size;
2009 ieee80211_txq_init(sdata, NULL, txqi, 0);
2015 /* initialise type-independent data */
2016 sdata->wdev.wiphy = local->hw.wiphy;
2017 sdata->local = local;
2019 ieee80211_init_frag_cache(&sdata->frags);
2021 INIT_LIST_HEAD(&sdata->key_list);
2023 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
2024 ieee80211_dfs_cac_timer_work);
2025 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
2026 ieee80211_delayed_tailroom_dec);
2028 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2029 struct ieee80211_supported_band *sband;
2030 sband = local->hw.wiphy->bands[i];
2031 sdata->rc_rateidx_mask[i] =
2032 sband ? (1 << sband->n_bitrates) - 1 : 0;
2037 memcpy(sdata->rc_rateidx_mcs_mask[i],
2038 sband->ht_cap.mcs.rx_mask,
2039 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2041 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2042 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2043 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2045 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2046 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2047 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2048 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2052 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2053 init_airtime_info(&sdata->airtime[i], &local->airtime[i]);
2055 ieee80211_set_default_queues(sdata);
2057 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2058 sdata->user_power_level = local->user_power_level;
2060 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2062 /* setup type-dependent data */
2063 ieee80211_setup_sdata(sdata, type);
2066 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2067 if (type == NL80211_IFTYPE_STATION)
2068 sdata->u.mgd.use_4addr = params->use_4addr;
2070 ndev->features |= local->hw.netdev_features;
2071 ndev->hw_features |= ndev->features &
2072 MAC80211_SUPPORTED_FEATURES_TX;
2074 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2076 /* MTU range is normally 256 - 2304, where the upper limit is
2077 * the maximum MSDU size. Monitor interfaces send and receive
2078 * MPDU and A-MSDU frames which may be much larger so we do
2079 * not impose an upper limit in that case.
2081 ndev->min_mtu = 256;
2082 if (type == NL80211_IFTYPE_MONITOR)
2085 ndev->max_mtu = local->hw.max_mtu;
2087 ret = cfg80211_register_netdevice(ndev);
2094 mutex_lock(&local->iflist_mtx);
2095 list_add_tail_rcu(&sdata->list, &local->interfaces);
2096 mutex_unlock(&local->iflist_mtx);
2099 *new_wdev = &sdata->wdev;
2104 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2108 mutex_lock(&sdata->local->iflist_mtx);
2109 list_del_rcu(&sdata->list);
2110 mutex_unlock(&sdata->local->iflist_mtx);
2113 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2117 cfg80211_unregister_wdev(&sdata->wdev);
2120 ieee80211_teardown_sdata(sdata);
2125 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2127 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2129 ieee80211_do_stop(sdata, true);
2132 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2134 struct ieee80211_sub_if_data *sdata, *tmp;
2135 LIST_HEAD(unreg_list);
2136 LIST_HEAD(wdev_list);
2140 /* Before destroying the interfaces, make sure they're all stopped so
2141 * that the hardware is stopped. Otherwise, the driver might still be
2142 * iterating the interfaces during the shutdown, e.g. from a worker
2143 * or from RX processing or similar, and if it does so (using atomic
2144 * iteration) while we're manipulating the list, the iteration will
2147 * After this, the hardware should be stopped and the driver should
2148 * have stopped all of its activities, so that we can do RCU-unaware
2149 * manipulations of the interface list below.
2151 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2153 WARN(local->open_count, "%s: open count remains %d\n",
2154 wiphy_name(local->hw.wiphy), local->open_count);
2156 ieee80211_txq_teardown_flows(local);
2158 mutex_lock(&local->iflist_mtx);
2159 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2160 list_del(&sdata->list);
2163 unregister_netdevice_queue(sdata->dev, &unreg_list);
2165 list_add(&sdata->list, &wdev_list);
2167 mutex_unlock(&local->iflist_mtx);
2169 unregister_netdevice_many(&unreg_list);
2171 wiphy_lock(local->hw.wiphy);
2172 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2173 list_del(&sdata->list);
2174 cfg80211_unregister_wdev(&sdata->wdev);
2177 wiphy_unlock(local->hw.wiphy);
2180 static int netdev_notify(struct notifier_block *nb,
2181 unsigned long state, void *ptr)
2183 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2184 struct ieee80211_sub_if_data *sdata;
2186 if (state != NETDEV_CHANGENAME)
2189 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2192 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2195 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2196 memcpy(sdata->name, dev->name, IFNAMSIZ);
2197 ieee80211_debugfs_rename_netdev(sdata);
2202 static struct notifier_block mac80211_netdev_notifier = {
2203 .notifier_call = netdev_notify,
2206 int ieee80211_iface_init(void)
2208 return register_netdevice_notifier(&mac80211_netdev_notifier);
2211 void ieee80211_iface_exit(void)
2213 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2216 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2218 if (sdata->vif.type == NL80211_IFTYPE_AP)
2219 atomic_inc(&sdata->u.ap.num_mcast_sta);
2220 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2221 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2224 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2226 if (sdata->vif.type == NL80211_IFTYPE_AP)
2227 atomic_dec(&sdata->u.ap.num_mcast_sta);
2228 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2229 atomic_dec(&sdata->u.vlan.num_mcast_sta);