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 int ieee80211_stop(struct net_device *dev)
637 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
639 /* close all dependent VLAN interfaces before locking wiphy */
640 if (sdata->vif.type == NL80211_IFTYPE_AP) {
641 struct ieee80211_sub_if_data *vlan, *tmpsdata;
643 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
645 dev_close(vlan->dev);
648 wiphy_lock(sdata->local->hw.wiphy);
649 ieee80211_do_stop(sdata, true);
650 wiphy_unlock(sdata->local->hw.wiphy);
655 static void ieee80211_set_multicast_list(struct net_device *dev)
657 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
658 struct ieee80211_local *local = sdata->local;
659 int allmulti, sdata_allmulti;
661 allmulti = !!(dev->flags & IFF_ALLMULTI);
662 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
664 if (allmulti != sdata_allmulti) {
665 if (dev->flags & IFF_ALLMULTI)
666 atomic_inc(&local->iff_allmultis);
668 atomic_dec(&local->iff_allmultis);
669 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
672 spin_lock_bh(&local->filter_lock);
673 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
674 spin_unlock_bh(&local->filter_lock);
675 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
679 * Called when the netdev is removed or, by the code below, before
680 * the interface type changes.
682 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
684 /* free extra data */
685 ieee80211_free_keys(sdata, false);
687 ieee80211_debugfs_remove_netdev(sdata);
689 ieee80211_destroy_frag_cache(&sdata->frags);
691 if (ieee80211_vif_is_mesh(&sdata->vif))
692 ieee80211_mesh_teardown_sdata(sdata);
695 static void ieee80211_uninit(struct net_device *dev)
697 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
700 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
702 struct net_device *sb_dev)
704 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
708 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
710 dev_fetch_sw_netstats(stats, dev->tstats);
713 static const struct net_device_ops ieee80211_dataif_ops = {
714 .ndo_open = ieee80211_open,
715 .ndo_stop = ieee80211_stop,
716 .ndo_uninit = ieee80211_uninit,
717 .ndo_start_xmit = ieee80211_subif_start_xmit,
718 .ndo_set_rx_mode = ieee80211_set_multicast_list,
719 .ndo_set_mac_address = ieee80211_change_mac,
720 .ndo_select_queue = ieee80211_netdev_select_queue,
721 .ndo_get_stats64 = ieee80211_get_stats64,
724 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
726 struct net_device *sb_dev)
728 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
729 struct ieee80211_local *local = sdata->local;
730 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
731 struct ieee80211_hdr *hdr;
734 if (local->hw.queues < IEEE80211_NUM_ACS)
737 /* reset flags and info before parsing radiotap header */
738 memset(info, 0, sizeof(*info));
740 if (!ieee80211_parse_tx_radiotap(skb, dev))
741 return 0; /* doesn't matter, frame will be dropped */
743 len_rthdr = ieee80211_get_radiotap_len(skb->data);
744 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
745 if (skb->len < len_rthdr + 2 ||
746 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
747 return 0; /* doesn't matter, frame will be dropped */
749 return ieee80211_select_queue_80211(sdata, skb, hdr);
752 static const struct net_device_ops ieee80211_monitorif_ops = {
753 .ndo_open = ieee80211_open,
754 .ndo_stop = ieee80211_stop,
755 .ndo_uninit = ieee80211_uninit,
756 .ndo_start_xmit = ieee80211_monitor_start_xmit,
757 .ndo_set_rx_mode = ieee80211_set_multicast_list,
758 .ndo_set_mac_address = ieee80211_change_mac,
759 .ndo_select_queue = ieee80211_monitor_select_queue,
760 .ndo_get_stats64 = ieee80211_get_stats64,
763 static const struct net_device_ops ieee80211_dataif_8023_ops = {
764 .ndo_open = ieee80211_open,
765 .ndo_stop = ieee80211_stop,
766 .ndo_uninit = ieee80211_uninit,
767 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
768 .ndo_set_rx_mode = ieee80211_set_multicast_list,
769 .ndo_set_mac_address = ieee80211_change_mac,
770 .ndo_select_queue = ieee80211_netdev_select_queue,
771 .ndo_get_stats64 = ieee80211_get_stats64,
774 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
777 /* P2P GO and client are mapped to AP/STATION types */
778 case NL80211_IFTYPE_AP:
779 case NL80211_IFTYPE_STATION:
786 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
788 struct ieee80211_local *local = sdata->local;
791 flags = sdata->vif.offload_flags;
793 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
794 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
795 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
797 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
798 local->hw.wiphy->frag_threshold != (u32)-1)
799 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
802 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
804 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
807 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
808 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
809 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
811 if (local->monitors &&
812 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
813 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
815 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
818 if (sdata->vif.offload_flags == flags)
821 sdata->vif.offload_flags = flags;
822 ieee80211_check_fast_rx_iface(sdata);
826 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
828 struct ieee80211_local *local = sdata->local;
829 struct ieee80211_sub_if_data *bss = sdata;
832 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
836 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
839 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
840 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
843 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
844 if (sdata->wdev.use_4addr &&
845 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
848 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
849 &ieee80211_dataif_ops;
852 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
854 struct ieee80211_local *local = sdata->local;
855 struct ieee80211_sub_if_data *vsdata;
857 if (ieee80211_set_sdata_offload_flags(sdata)) {
858 drv_update_vif_offload(local, sdata);
859 ieee80211_set_vif_encap_ops(sdata);
862 list_for_each_entry(vsdata, &local->interfaces, list) {
863 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
864 vsdata->bss != &sdata->u.ap)
867 ieee80211_set_vif_encap_ops(vsdata);
871 void ieee80211_recalc_offload(struct ieee80211_local *local)
873 struct ieee80211_sub_if_data *sdata;
875 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
878 mutex_lock(&local->iflist_mtx);
880 list_for_each_entry(sdata, &local->interfaces, list) {
881 if (!ieee80211_sdata_running(sdata))
884 ieee80211_recalc_sdata_offload(sdata);
887 mutex_unlock(&local->iflist_mtx);
890 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
893 struct ieee80211_local *local = sdata->local;
894 u32 flags = sdata->u.mntr.flags;
896 #define ADJUST(_f, _s) do { \
897 if (flags & MONITOR_FLAG_##_f) \
898 local->fif_##_s += offset; \
901 ADJUST(FCSFAIL, fcsfail);
902 ADJUST(PLCPFAIL, plcpfail);
903 ADJUST(CONTROL, control);
904 ADJUST(CONTROL, pspoll);
905 ADJUST(OTHER_BSS, other_bss);
910 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
912 struct ieee80211_local *local = sdata->local;
915 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
916 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
917 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
918 else if (local->hw.queues >= IEEE80211_NUM_ACS)
919 sdata->vif.hw_queue[i] = i;
921 sdata->vif.hw_queue[i] = 0;
923 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
926 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
928 struct ieee80211_sub_if_data *sdata;
931 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
935 lockdep_assert_wiphy(local->hw.wiphy);
937 if (local->monitor_sdata)
940 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
945 sdata->local = local;
946 sdata->vif.type = NL80211_IFTYPE_MONITOR;
947 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
948 wiphy_name(local->hw.wiphy));
949 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
951 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
953 ieee80211_set_default_queues(sdata);
955 ret = drv_add_interface(local, sdata);
957 /* ok .. stupid driver, it asked for this! */
962 set_bit(SDATA_STATE_RUNNING, &sdata->state);
964 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
970 mutex_lock(&local->iflist_mtx);
971 rcu_assign_pointer(local->monitor_sdata, sdata);
972 mutex_unlock(&local->iflist_mtx);
974 mutex_lock(&local->mtx);
975 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
976 IEEE80211_CHANCTX_EXCLUSIVE);
977 mutex_unlock(&local->mtx);
979 mutex_lock(&local->iflist_mtx);
980 RCU_INIT_POINTER(local->monitor_sdata, NULL);
981 mutex_unlock(&local->iflist_mtx);
983 drv_remove_interface(local, sdata);
988 skb_queue_head_init(&sdata->skb_queue);
989 skb_queue_head_init(&sdata->status_queue);
990 INIT_WORK(&sdata->work, ieee80211_iface_work);
995 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
997 struct ieee80211_sub_if_data *sdata;
999 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1003 lockdep_assert_wiphy(local->hw.wiphy);
1005 mutex_lock(&local->iflist_mtx);
1007 sdata = rcu_dereference_protected(local->monitor_sdata,
1008 lockdep_is_held(&local->iflist_mtx));
1010 mutex_unlock(&local->iflist_mtx);
1014 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1015 mutex_unlock(&local->iflist_mtx);
1019 mutex_lock(&local->mtx);
1020 ieee80211_vif_release_channel(sdata);
1021 mutex_unlock(&local->mtx);
1023 drv_remove_interface(local, sdata);
1029 * NOTE: Be very careful when changing this function, it must NOT return
1030 * an error on interface type changes that have been pre-checked, so most
1031 * checks should be in ieee80211_check_concurrent_iface.
1033 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1035 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1036 struct net_device *dev = wdev->netdev;
1037 struct ieee80211_local *local = sdata->local;
1040 u32 hw_reconf_flags = 0;
1042 switch (sdata->vif.type) {
1043 case NL80211_IFTYPE_AP_VLAN: {
1044 struct ieee80211_sub_if_data *master;
1049 mutex_lock(&local->mtx);
1050 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1051 mutex_unlock(&local->mtx);
1053 master = container_of(sdata->bss,
1054 struct ieee80211_sub_if_data, u.ap);
1055 sdata->control_port_protocol =
1056 master->control_port_protocol;
1057 sdata->control_port_no_encrypt =
1058 master->control_port_no_encrypt;
1059 sdata->control_port_over_nl80211 =
1060 master->control_port_over_nl80211;
1061 sdata->control_port_no_preauth =
1062 master->control_port_no_preauth;
1063 sdata->vif.cab_queue = master->vif.cab_queue;
1064 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1065 sizeof(sdata->vif.hw_queue));
1066 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1068 mutex_lock(&local->key_mtx);
1069 sdata->crypto_tx_tailroom_needed_cnt +=
1070 master->crypto_tx_tailroom_needed_cnt;
1071 mutex_unlock(&local->key_mtx);
1075 case NL80211_IFTYPE_AP:
1076 sdata->bss = &sdata->u.ap;
1078 case NL80211_IFTYPE_MESH_POINT:
1079 case NL80211_IFTYPE_STATION:
1080 case NL80211_IFTYPE_MONITOR:
1081 case NL80211_IFTYPE_ADHOC:
1082 case NL80211_IFTYPE_P2P_DEVICE:
1083 case NL80211_IFTYPE_OCB:
1084 case NL80211_IFTYPE_NAN:
1085 /* no special treatment */
1087 case NL80211_IFTYPE_UNSPECIFIED:
1088 case NUM_NL80211_IFTYPES:
1089 case NL80211_IFTYPE_P2P_CLIENT:
1090 case NL80211_IFTYPE_P2P_GO:
1091 case NL80211_IFTYPE_WDS:
1097 if (local->open_count == 0) {
1098 res = drv_start(local);
1101 /* we're brought up, everything changes */
1102 hw_reconf_flags = ~0;
1103 ieee80211_led_radio(local, true);
1104 ieee80211_mod_tpt_led_trig(local,
1105 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1109 * Copy the hopefully now-present MAC address to
1110 * this interface, if it has the special null one.
1112 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1113 memcpy(dev->dev_addr,
1114 local->hw.wiphy->perm_addr,
1116 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1118 if (!is_valid_ether_addr(dev->dev_addr)) {
1119 res = -EADDRNOTAVAIL;
1124 switch (sdata->vif.type) {
1125 case NL80211_IFTYPE_AP_VLAN:
1126 /* no need to tell driver, but set carrier and chanctx */
1127 if (rtnl_dereference(sdata->bss->beacon)) {
1128 ieee80211_vif_vlan_copy_chanctx(sdata);
1129 netif_carrier_on(dev);
1130 ieee80211_set_vif_encap_ops(sdata);
1132 netif_carrier_off(dev);
1135 case NL80211_IFTYPE_MONITOR:
1136 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1137 local->cooked_mntrs++;
1141 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1142 res = drv_add_interface(local, sdata);
1145 } else if (local->monitors == 0 && local->open_count == 0) {
1146 res = ieee80211_add_virtual_monitor(local);
1151 /* must be before the call to ieee80211_configure_filter */
1153 if (local->monitors == 1) {
1154 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1155 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1158 ieee80211_adjust_monitor_flags(sdata, 1);
1159 ieee80211_configure_filter(local);
1160 ieee80211_recalc_offload(local);
1161 mutex_lock(&local->mtx);
1162 ieee80211_recalc_idle(local);
1163 mutex_unlock(&local->mtx);
1165 netif_carrier_on(dev);
1169 ieee80211_del_virtual_monitor(local);
1170 ieee80211_set_sdata_offload_flags(sdata);
1172 res = drv_add_interface(local, sdata);
1176 ieee80211_set_vif_encap_ops(sdata);
1177 res = ieee80211_check_queues(sdata,
1178 ieee80211_vif_type_p2p(&sdata->vif));
1180 goto err_del_interface;
1183 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1184 local->fif_pspoll++;
1185 local->fif_probe_req++;
1187 ieee80211_configure_filter(local);
1188 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1189 local->fif_probe_req++;
1192 if (sdata->vif.probe_req_reg)
1193 drv_config_iface_filter(local, sdata,
1197 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1198 sdata->vif.type != NL80211_IFTYPE_NAN)
1199 changed |= ieee80211_reset_erp_info(sdata);
1200 ieee80211_bss_info_change_notify(sdata, changed);
1202 switch (sdata->vif.type) {
1203 case NL80211_IFTYPE_STATION:
1204 case NL80211_IFTYPE_ADHOC:
1205 case NL80211_IFTYPE_AP:
1206 case NL80211_IFTYPE_MESH_POINT:
1207 case NL80211_IFTYPE_OCB:
1208 netif_carrier_off(dev);
1210 case NL80211_IFTYPE_P2P_DEVICE:
1211 case NL80211_IFTYPE_NAN:
1219 * Set default queue parameters so drivers don't
1220 * need to initialise the hardware if the hardware
1221 * doesn't start up with sane defaults.
1222 * Enable QoS for anything but station interfaces.
1224 ieee80211_set_wmm_default(sdata, true,
1225 sdata->vif.type != NL80211_IFTYPE_STATION);
1228 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1230 switch (sdata->vif.type) {
1231 case NL80211_IFTYPE_P2P_DEVICE:
1232 rcu_assign_pointer(local->p2p_sdata, sdata);
1234 case NL80211_IFTYPE_MONITOR:
1235 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1237 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1244 * set_multicast_list will be invoked by the networking core
1245 * which will check whether any increments here were done in
1246 * error and sync them down to the hardware as filter flags.
1248 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1249 atomic_inc(&local->iff_allmultis);
1252 local->open_count++;
1254 if (hw_reconf_flags)
1255 ieee80211_hw_config(local, hw_reconf_flags);
1257 ieee80211_recalc_ps(local);
1259 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1260 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1261 local->ops->wake_tx_queue) {
1262 /* XXX: for AP_VLAN, actually track AP queues */
1264 netif_tx_start_all_queues(dev);
1266 unsigned long flags;
1267 int n_acs = IEEE80211_NUM_ACS;
1270 if (local->hw.queues < IEEE80211_NUM_ACS)
1273 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1274 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1275 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1276 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1277 for (ac = 0; ac < n_acs; ac++) {
1278 int ac_queue = sdata->vif.hw_queue[ac];
1280 if (local->queue_stop_reasons[ac_queue] == 0 &&
1281 skb_queue_empty(&local->pending[ac_queue]))
1282 netif_start_subqueue(dev, ac);
1285 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1290 drv_remove_interface(local, sdata);
1292 if (!local->open_count)
1296 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1297 mutex_lock(&local->mtx);
1298 list_del(&sdata->u.vlan.list);
1299 mutex_unlock(&local->mtx);
1301 /* might already be clear but that doesn't matter */
1302 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1306 static void ieee80211_if_free(struct net_device *dev)
1308 free_percpu(dev->tstats);
1311 static void ieee80211_if_setup(struct net_device *dev)
1314 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1315 dev->netdev_ops = &ieee80211_dataif_ops;
1316 dev->needs_free_netdev = true;
1317 dev->priv_destructor = ieee80211_if_free;
1320 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1322 ieee80211_if_setup(dev);
1323 dev->priv_flags |= IFF_NO_QUEUE;
1326 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1327 struct ieee80211_sub_if_data *sdata,
1328 struct sk_buff *skb)
1330 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1332 if (ieee80211_is_action(mgmt->frame_control) &&
1333 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1334 struct sta_info *sta;
1337 mutex_lock(&local->sta_mtx);
1338 sta = sta_info_get_bss(sdata, mgmt->sa);
1340 switch (mgmt->u.action.u.addba_req.action_code) {
1341 case WLAN_ACTION_ADDBA_REQ:
1342 ieee80211_process_addba_request(local, sta,
1345 case WLAN_ACTION_ADDBA_RESP:
1346 ieee80211_process_addba_resp(local, sta,
1349 case WLAN_ACTION_DELBA:
1350 ieee80211_process_delba(sdata, sta,
1358 mutex_unlock(&local->sta_mtx);
1359 } else if (ieee80211_is_action(mgmt->frame_control) &&
1360 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1361 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1362 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1363 struct ieee80211_rx_status *status;
1364 enum nl80211_band band;
1365 struct sta_info *sta;
1368 status = IEEE80211_SKB_RXCB(skb);
1369 band = status->band;
1370 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1372 mutex_lock(&local->sta_mtx);
1373 sta = sta_info_get_bss(sdata, mgmt->sa);
1376 ieee80211_vht_handle_opmode(sdata, sta, opmode,
1379 mutex_unlock(&local->sta_mtx);
1382 case WLAN_VHT_ACTION_GROUPID_MGMT:
1383 ieee80211_process_mu_groups(sdata, mgmt);
1389 } else if (ieee80211_is_action(mgmt->frame_control) &&
1390 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1391 switch (mgmt->u.action.u.s1g.action_code) {
1392 case WLAN_S1G_TWT_TEARDOWN:
1393 case WLAN_S1G_TWT_SETUP:
1394 ieee80211_s1g_rx_twt_action(sdata, skb);
1399 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1400 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1401 ieee80211_sta_rx_queued_ext(sdata, skb);
1404 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1405 struct ieee80211_hdr *hdr = (void *)mgmt;
1406 struct sta_info *sta;
1409 * So the frame isn't mgmt, but frame_control
1410 * is at the right place anyway, of course, so
1411 * the if statement is correct.
1413 * Warn if we have other data frame types here,
1414 * they must not get here.
1416 WARN_ON(hdr->frame_control &
1417 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1418 WARN_ON(!(hdr->seq_ctrl &
1419 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1421 * This was a fragment of a frame, received while
1422 * a block-ack session was active. That cannot be
1423 * right, so terminate the session.
1425 mutex_lock(&local->sta_mtx);
1426 sta = sta_info_get_bss(sdata, mgmt->sa);
1428 u16 tid = ieee80211_get_tid(hdr);
1430 __ieee80211_stop_rx_ba_session(
1431 sta, tid, WLAN_BACK_RECIPIENT,
1432 WLAN_REASON_QSTA_REQUIRE_SETUP,
1435 mutex_unlock(&local->sta_mtx);
1436 } else switch (sdata->vif.type) {
1437 case NL80211_IFTYPE_STATION:
1438 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1440 case NL80211_IFTYPE_ADHOC:
1441 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1443 case NL80211_IFTYPE_MESH_POINT:
1444 if (!ieee80211_vif_is_mesh(&sdata->vif))
1446 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1449 WARN(1, "frame for unexpected interface type");
1454 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1455 struct sk_buff *skb)
1457 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1459 if (ieee80211_is_action(mgmt->frame_control) &&
1460 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1461 switch (mgmt->u.action.u.s1g.action_code) {
1462 case WLAN_S1G_TWT_TEARDOWN:
1463 case WLAN_S1G_TWT_SETUP:
1464 ieee80211_s1g_status_twt_action(sdata, skb);
1472 static void ieee80211_iface_work(struct work_struct *work)
1474 struct ieee80211_sub_if_data *sdata =
1475 container_of(work, struct ieee80211_sub_if_data, work);
1476 struct ieee80211_local *local = sdata->local;
1477 struct sk_buff *skb;
1479 if (!ieee80211_sdata_running(sdata))
1482 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1485 if (!ieee80211_can_run_worker(local))
1488 /* first process frames */
1489 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1490 kcov_remote_start_common(skb_get_kcov_handle(skb));
1492 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1493 ieee80211_process_tdls_channel_switch(sdata, skb);
1495 ieee80211_iface_process_skb(local, sdata, skb);
1501 /* process status queue */
1502 while ((skb = skb_dequeue(&sdata->status_queue))) {
1503 kcov_remote_start_common(skb_get_kcov_handle(skb));
1505 ieee80211_iface_process_status(sdata, skb);
1511 /* then other type-dependent work */
1512 switch (sdata->vif.type) {
1513 case NL80211_IFTYPE_STATION:
1514 ieee80211_sta_work(sdata);
1516 case NL80211_IFTYPE_ADHOC:
1517 ieee80211_ibss_work(sdata);
1519 case NL80211_IFTYPE_MESH_POINT:
1520 if (!ieee80211_vif_is_mesh(&sdata->vif))
1522 ieee80211_mesh_work(sdata);
1524 case NL80211_IFTYPE_OCB:
1525 ieee80211_ocb_work(sdata);
1532 static void ieee80211_recalc_smps_work(struct work_struct *work)
1534 struct ieee80211_sub_if_data *sdata =
1535 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1537 ieee80211_recalc_smps(sdata);
1541 * Helper function to initialise an interface to a specific type.
1543 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1544 enum nl80211_iftype type)
1546 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1549 /* clear type-dependent union */
1550 memset(&sdata->u, 0, sizeof(sdata->u));
1552 /* and set some type-dependent values */
1553 sdata->vif.type = type;
1554 sdata->vif.p2p = false;
1555 sdata->wdev.iftype = type;
1557 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1558 sdata->control_port_no_encrypt = false;
1559 sdata->control_port_over_nl80211 = false;
1560 sdata->control_port_no_preauth = false;
1561 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1562 sdata->vif.bss_conf.idle = true;
1563 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1565 sdata->noack_map = 0;
1567 /* only monitor/p2p-device differ */
1569 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1570 sdata->dev->type = ARPHRD_ETHER;
1573 skb_queue_head_init(&sdata->skb_queue);
1574 skb_queue_head_init(&sdata->status_queue);
1575 INIT_WORK(&sdata->work, ieee80211_iface_work);
1576 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1577 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1578 INIT_WORK(&sdata->color_change_finalize_work, ieee80211_color_change_finalize_work);
1579 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1580 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1583 case NL80211_IFTYPE_P2P_GO:
1584 type = NL80211_IFTYPE_AP;
1585 sdata->vif.type = type;
1586 sdata->vif.p2p = true;
1588 case NL80211_IFTYPE_AP:
1589 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1590 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1591 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1593 case NL80211_IFTYPE_P2P_CLIENT:
1594 type = NL80211_IFTYPE_STATION;
1595 sdata->vif.type = type;
1596 sdata->vif.p2p = true;
1598 case NL80211_IFTYPE_STATION:
1599 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1600 ieee80211_sta_setup_sdata(sdata);
1602 case NL80211_IFTYPE_OCB:
1603 sdata->vif.bss_conf.bssid = bssid_wildcard;
1604 ieee80211_ocb_setup_sdata(sdata);
1606 case NL80211_IFTYPE_ADHOC:
1607 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1608 ieee80211_ibss_setup_sdata(sdata);
1610 case NL80211_IFTYPE_MESH_POINT:
1611 if (ieee80211_vif_is_mesh(&sdata->vif))
1612 ieee80211_mesh_init_sdata(sdata);
1614 case NL80211_IFTYPE_MONITOR:
1615 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1616 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1617 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1618 MONITOR_FLAG_OTHER_BSS;
1620 case NL80211_IFTYPE_NAN:
1621 idr_init(&sdata->u.nan.function_inst_ids);
1622 spin_lock_init(&sdata->u.nan.func_lock);
1623 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1625 case NL80211_IFTYPE_AP_VLAN:
1626 case NL80211_IFTYPE_P2P_DEVICE:
1627 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1629 case NL80211_IFTYPE_UNSPECIFIED:
1630 case NL80211_IFTYPE_WDS:
1631 case NUM_NL80211_IFTYPES:
1636 ieee80211_debugfs_add_netdev(sdata);
1639 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1640 enum nl80211_iftype type)
1642 struct ieee80211_local *local = sdata->local;
1644 enum nl80211_iftype internal_type = type;
1649 if (!local->ops->change_interface)
1652 switch (sdata->vif.type) {
1653 case NL80211_IFTYPE_AP:
1654 if (!list_empty(&sdata->u.ap.vlans))
1657 case NL80211_IFTYPE_STATION:
1658 case NL80211_IFTYPE_ADHOC:
1659 case NL80211_IFTYPE_OCB:
1661 * Could maybe also all others here?
1662 * Just not sure how that interacts
1663 * with the RX/config path e.g. for
1672 case NL80211_IFTYPE_AP:
1673 case NL80211_IFTYPE_STATION:
1674 case NL80211_IFTYPE_ADHOC:
1675 case NL80211_IFTYPE_OCB:
1677 * Could probably support everything
1681 case NL80211_IFTYPE_P2P_CLIENT:
1683 internal_type = NL80211_IFTYPE_STATION;
1685 case NL80211_IFTYPE_P2P_GO:
1687 internal_type = NL80211_IFTYPE_AP;
1693 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1697 ieee80211_stop_vif_queues(local, sdata,
1698 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1701 ieee80211_do_stop(sdata, false);
1703 ieee80211_teardown_sdata(sdata);
1705 ieee80211_set_sdata_offload_flags(sdata);
1706 ret = drv_change_interface(local, sdata, internal_type, p2p);
1708 type = ieee80211_vif_type_p2p(&sdata->vif);
1711 * Ignore return value here, there's not much we can do since
1712 * the driver changed the interface type internally already.
1713 * The warnings will hopefully make driver authors fix it :-)
1715 ieee80211_check_queues(sdata, type);
1717 ieee80211_setup_sdata(sdata, type);
1718 ieee80211_set_vif_encap_ops(sdata);
1720 err = ieee80211_do_open(&sdata->wdev, false);
1721 WARN(err, "type change: do_open returned %d", err);
1723 ieee80211_wake_vif_queues(local, sdata,
1724 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1728 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1729 enum nl80211_iftype type)
1735 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1738 if (ieee80211_sdata_running(sdata)) {
1739 ret = ieee80211_runtime_change_iftype(sdata, type);
1743 /* Purge and reset type-dependent state. */
1744 ieee80211_teardown_sdata(sdata);
1745 ieee80211_setup_sdata(sdata, type);
1748 /* reset some values that shouldn't be kept across type changes */
1749 if (type == NL80211_IFTYPE_STATION)
1750 sdata->u.mgd.use_4addr = false;
1755 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1756 u8 *perm_addr, enum nl80211_iftype type)
1758 struct ieee80211_sub_if_data *sdata;
1759 u64 mask, start, addr, val, inc;
1761 u8 tmp_addr[ETH_ALEN];
1764 /* default ... something at least */
1765 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1767 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1768 local->hw.wiphy->n_addresses <= 1)
1771 mutex_lock(&local->iflist_mtx);
1774 case NL80211_IFTYPE_MONITOR:
1775 /* doesn't matter */
1777 case NL80211_IFTYPE_AP_VLAN:
1778 /* match up with an AP interface */
1779 list_for_each_entry(sdata, &local->interfaces, list) {
1780 if (sdata->vif.type != NL80211_IFTYPE_AP)
1782 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1785 /* keep default if no AP interface present */
1787 case NL80211_IFTYPE_P2P_CLIENT:
1788 case NL80211_IFTYPE_P2P_GO:
1789 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1790 list_for_each_entry(sdata, &local->interfaces, list) {
1791 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1793 if (!ieee80211_sdata_running(sdata))
1795 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1801 /* assign a new address if possible -- try n_addresses first */
1802 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1805 list_for_each_entry(sdata, &local->interfaces, list) {
1806 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1815 local->hw.wiphy->addresses[i].addr,
1821 /* try mask if available */
1822 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1825 m = local->hw.wiphy->addr_mask;
1826 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1827 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1828 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1830 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1831 /* not a contiguous mask ... not handled now! */
1832 pr_info("not contiguous\n");
1837 * Pick address of existing interface in case user changed
1838 * MAC address manually, default to perm_addr.
1840 m = local->hw.wiphy->perm_addr;
1841 list_for_each_entry(sdata, &local->interfaces, list) {
1842 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1844 m = sdata->vif.addr;
1847 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1848 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1849 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1851 inc = 1ULL<<__ffs64(mask);
1852 val = (start & mask);
1853 addr = (start & ~mask) | (val & mask);
1857 tmp_addr[5] = addr >> 0*8;
1858 tmp_addr[4] = addr >> 1*8;
1859 tmp_addr[3] = addr >> 2*8;
1860 tmp_addr[2] = addr >> 3*8;
1861 tmp_addr[1] = addr >> 4*8;
1862 tmp_addr[0] = addr >> 5*8;
1866 list_for_each_entry(sdata, &local->interfaces, list) {
1867 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1874 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1877 addr = (start & ~mask) | (val & mask);
1878 } while (addr != start);
1884 mutex_unlock(&local->iflist_mtx);
1887 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1888 unsigned char name_assign_type,
1889 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1890 struct vif_params *params)
1892 struct net_device *ndev = NULL;
1893 struct ieee80211_sub_if_data *sdata = NULL;
1894 struct txq_info *txqi;
1895 void (*if_setup)(struct net_device *dev);
1901 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1902 struct wireless_dev *wdev;
1904 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1908 wdev = &sdata->wdev;
1911 strlcpy(sdata->name, name, IFNAMSIZ);
1912 ieee80211_assign_perm_addr(local, wdev->address, type);
1913 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1915 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1919 if (local->ops->wake_tx_queue &&
1920 type != NL80211_IFTYPE_AP_VLAN &&
1921 (type != NL80211_IFTYPE_MONITOR ||
1922 (params->flags & MONITOR_FLAG_ACTIVE)))
1923 txq_size += sizeof(struct txq_info) +
1924 local->hw.txq_data_size;
1926 if (local->ops->wake_tx_queue) {
1927 if_setup = ieee80211_if_setup_no_queue;
1929 if_setup = ieee80211_if_setup;
1930 if (local->hw.queues >= IEEE80211_NUM_ACS)
1931 txqs = IEEE80211_NUM_ACS;
1934 ndev = alloc_netdev_mqs(size + txq_size,
1935 name, name_assign_type,
1940 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1941 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1943 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1945 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1946 if (!ndev->tstats) {
1951 ndev->needed_headroom = local->tx_headroom +
1952 4*6 /* four MAC addresses */
1953 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1955 + 8 /* rfc1042/bridge tunnel */
1956 - ETH_HLEN /* ethernet hard_header_len */
1957 + IEEE80211_ENCRYPT_HEADROOM;
1958 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1960 ret = dev_alloc_name(ndev, ndev->name);
1962 ieee80211_if_free(ndev);
1967 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1968 if (is_valid_ether_addr(params->macaddr))
1969 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1971 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1972 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1974 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1975 sdata = netdev_priv(ndev);
1976 ndev->ieee80211_ptr = &sdata->wdev;
1977 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1978 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1981 txqi = netdev_priv(ndev) + size;
1982 ieee80211_txq_init(sdata, NULL, txqi, 0);
1988 /* initialise type-independent data */
1989 sdata->wdev.wiphy = local->hw.wiphy;
1990 sdata->local = local;
1992 ieee80211_init_frag_cache(&sdata->frags);
1994 INIT_LIST_HEAD(&sdata->key_list);
1996 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1997 ieee80211_dfs_cac_timer_work);
1998 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1999 ieee80211_delayed_tailroom_dec);
2001 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2002 struct ieee80211_supported_band *sband;
2003 sband = local->hw.wiphy->bands[i];
2004 sdata->rc_rateidx_mask[i] =
2005 sband ? (1 << sband->n_bitrates) - 1 : 0;
2010 memcpy(sdata->rc_rateidx_mcs_mask[i],
2011 sband->ht_cap.mcs.rx_mask,
2012 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2014 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2015 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2016 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2018 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2019 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2020 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2021 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2025 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2026 init_airtime_info(&sdata->airtime[i], &local->airtime[i]);
2028 ieee80211_set_default_queues(sdata);
2030 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2031 sdata->user_power_level = local->user_power_level;
2033 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2035 /* setup type-dependent data */
2036 ieee80211_setup_sdata(sdata, type);
2039 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2040 if (type == NL80211_IFTYPE_STATION)
2041 sdata->u.mgd.use_4addr = params->use_4addr;
2043 ndev->features |= local->hw.netdev_features;
2044 ndev->hw_features |= ndev->features &
2045 MAC80211_SUPPORTED_FEATURES_TX;
2047 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2049 /* MTU range is normally 256 - 2304, where the upper limit is
2050 * the maximum MSDU size. Monitor interfaces send and receive
2051 * MPDU and A-MSDU frames which may be much larger so we do
2052 * not impose an upper limit in that case.
2054 ndev->min_mtu = 256;
2055 if (type == NL80211_IFTYPE_MONITOR)
2058 ndev->max_mtu = local->hw.max_mtu;
2060 ret = cfg80211_register_netdevice(ndev);
2067 mutex_lock(&local->iflist_mtx);
2068 list_add_tail_rcu(&sdata->list, &local->interfaces);
2069 mutex_unlock(&local->iflist_mtx);
2072 *new_wdev = &sdata->wdev;
2077 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2081 mutex_lock(&sdata->local->iflist_mtx);
2082 list_del_rcu(&sdata->list);
2083 mutex_unlock(&sdata->local->iflist_mtx);
2086 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2090 cfg80211_unregister_wdev(&sdata->wdev);
2093 ieee80211_teardown_sdata(sdata);
2098 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2100 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2102 ieee80211_do_stop(sdata, true);
2105 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2107 struct ieee80211_sub_if_data *sdata, *tmp;
2108 LIST_HEAD(unreg_list);
2109 LIST_HEAD(wdev_list);
2113 /* Before destroying the interfaces, make sure they're all stopped so
2114 * that the hardware is stopped. Otherwise, the driver might still be
2115 * iterating the interfaces during the shutdown, e.g. from a worker
2116 * or from RX processing or similar, and if it does so (using atomic
2117 * iteration) while we're manipulating the list, the iteration will
2120 * After this, the hardware should be stopped and the driver should
2121 * have stopped all of its activities, so that we can do RCU-unaware
2122 * manipulations of the interface list below.
2124 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2126 WARN(local->open_count, "%s: open count remains %d\n",
2127 wiphy_name(local->hw.wiphy), local->open_count);
2129 ieee80211_txq_teardown_flows(local);
2131 mutex_lock(&local->iflist_mtx);
2132 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2133 list_del(&sdata->list);
2136 unregister_netdevice_queue(sdata->dev, &unreg_list);
2138 list_add(&sdata->list, &wdev_list);
2140 mutex_unlock(&local->iflist_mtx);
2142 unregister_netdevice_many(&unreg_list);
2144 wiphy_lock(local->hw.wiphy);
2145 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2146 list_del(&sdata->list);
2147 cfg80211_unregister_wdev(&sdata->wdev);
2150 wiphy_unlock(local->hw.wiphy);
2153 static int netdev_notify(struct notifier_block *nb,
2154 unsigned long state, void *ptr)
2156 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2157 struct ieee80211_sub_if_data *sdata;
2159 if (state != NETDEV_CHANGENAME)
2162 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2165 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2168 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2169 memcpy(sdata->name, dev->name, IFNAMSIZ);
2170 ieee80211_debugfs_rename_netdev(sdata);
2175 static struct notifier_block mac80211_netdev_notifier = {
2176 .notifier_call = netdev_notify,
2179 int ieee80211_iface_init(void)
2181 return register_netdevice_notifier(&mac80211_netdev_notifier);
2184 void ieee80211_iface_exit(void)
2186 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2189 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2191 if (sdata->vif.type == NL80211_IFTYPE_AP)
2192 atomic_inc(&sdata->u.ap.num_mcast_sta);
2193 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2194 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2197 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2199 if (sdata->vif.type == NL80211_IFTYPE_AP)
2200 atomic_dec(&sdata->u.ap.num_mcast_sta);
2201 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2202 atomic_dec(&sdata->u.vlan.num_mcast_sta);