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);
466 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
468 if (sdata->wdev.cac_started) {
469 chandef = sdata->vif.bss_conf.chandef;
470 WARN_ON(local->suspended);
471 mutex_lock(&local->mtx);
472 ieee80211_vif_release_channel(sdata);
473 mutex_unlock(&local->mtx);
474 cfg80211_cac_event(sdata->dev, &chandef,
475 NL80211_RADAR_CAC_ABORTED,
479 if (sdata->vif.type == NL80211_IFTYPE_AP) {
480 WARN_ON(!list_empty(&sdata->u.ap.vlans));
481 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
482 /* remove all packets in parent bc_buf pointing to this dev */
483 ps = &sdata->bss->ps;
485 spin_lock_irqsave(&ps->bc_buf.lock, flags);
486 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
487 if (skb->dev == sdata->dev) {
488 __skb_unlink(skb, &ps->bc_buf);
489 local->total_ps_buffered--;
490 ieee80211_free_txskb(&local->hw, skb);
493 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
499 switch (sdata->vif.type) {
500 case NL80211_IFTYPE_AP_VLAN:
501 mutex_lock(&local->mtx);
502 list_del(&sdata->u.vlan.list);
503 mutex_unlock(&local->mtx);
504 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
505 /* see comment in the default case below */
506 ieee80211_free_keys(sdata, true);
507 /* no need to tell driver */
509 case NL80211_IFTYPE_MONITOR:
510 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
511 local->cooked_mntrs--;
516 if (local->monitors == 0) {
517 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
518 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
521 ieee80211_adjust_monitor_flags(sdata, -1);
523 case NL80211_IFTYPE_NAN:
524 /* clean all the functions */
525 spin_lock_bh(&sdata->u.nan.func_lock);
527 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
528 idr_remove(&sdata->u.nan.function_inst_ids, i);
529 cfg80211_free_nan_func(func);
531 idr_destroy(&sdata->u.nan.function_inst_ids);
533 spin_unlock_bh(&sdata->u.nan.func_lock);
535 case NL80211_IFTYPE_P2P_DEVICE:
536 /* relies on synchronize_rcu() below */
537 RCU_INIT_POINTER(local->p2p_sdata, NULL);
540 cancel_work_sync(&sdata->work);
542 * When we get here, the interface is marked down.
543 * Free the remaining keys, if there are any
544 * (which can happen in AP mode if userspace sets
545 * keys before the interface is operating)
547 * Force the key freeing to always synchronize_net()
548 * to wait for the RX path in case it is using this
549 * interface enqueuing frames at this very time on
552 ieee80211_free_keys(sdata, true);
553 skb_queue_purge(&sdata->skb_queue);
556 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
557 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
558 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
559 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
560 if (info->control.vif == &sdata->vif) {
561 __skb_unlink(skb, &local->pending[i]);
562 ieee80211_free_txskb(&local->hw, skb);
566 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
568 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
569 ieee80211_txq_remove_vlan(local, sdata);
573 if (local->open_count == 0)
574 ieee80211_clear_tx_pending(local);
576 sdata->vif.bss_conf.beacon_int = 0;
579 * If the interface goes down while suspended, presumably because
580 * the device was unplugged and that happens before our resume,
581 * then the driver is already unconfigured and the remainder of
582 * this function isn't needed.
583 * XXX: what about WoWLAN? If the device has software state, e.g.
584 * memory allocated, it might expect teardown commands from
587 if (local->suspended) {
588 WARN_ON(local->wowlan);
589 WARN_ON(rtnl_dereference(local->monitor_sdata));
593 switch (sdata->vif.type) {
594 case NL80211_IFTYPE_AP_VLAN:
596 case NL80211_IFTYPE_MONITOR:
597 if (local->monitors == 0)
598 ieee80211_del_virtual_monitor(local);
600 mutex_lock(&local->mtx);
601 ieee80211_recalc_idle(local);
602 mutex_unlock(&local->mtx);
604 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
610 drv_remove_interface(local, sdata);
613 ieee80211_recalc_ps(local);
616 flush_delayed_work(&local->scan_work);
618 if (local->open_count == 0) {
619 ieee80211_stop_device(local);
621 /* no reconfiguring after stop! */
625 /* do after stop to avoid reconfiguring when we stop anyway */
626 ieee80211_configure_filter(local);
627 ieee80211_hw_config(local, hw_reconf_flags);
629 if (local->monitors == local->open_count)
630 ieee80211_add_virtual_monitor(local);
633 static int ieee80211_stop(struct net_device *dev)
635 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
637 /* close all dependent VLAN interfaces before locking wiphy */
638 if (sdata->vif.type == NL80211_IFTYPE_AP) {
639 struct ieee80211_sub_if_data *vlan, *tmpsdata;
641 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
643 dev_close(vlan->dev);
646 wiphy_lock(sdata->local->hw.wiphy);
647 ieee80211_do_stop(sdata, true);
648 wiphy_unlock(sdata->local->hw.wiphy);
653 static void ieee80211_set_multicast_list(struct net_device *dev)
655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
656 struct ieee80211_local *local = sdata->local;
657 int allmulti, sdata_allmulti;
659 allmulti = !!(dev->flags & IFF_ALLMULTI);
660 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
662 if (allmulti != sdata_allmulti) {
663 if (dev->flags & IFF_ALLMULTI)
664 atomic_inc(&local->iff_allmultis);
666 atomic_dec(&local->iff_allmultis);
667 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
670 spin_lock_bh(&local->filter_lock);
671 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
672 spin_unlock_bh(&local->filter_lock);
673 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
677 * Called when the netdev is removed or, by the code below, before
678 * the interface type changes.
680 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
682 /* free extra data */
683 ieee80211_free_keys(sdata, false);
685 ieee80211_debugfs_remove_netdev(sdata);
687 ieee80211_destroy_frag_cache(&sdata->frags);
689 if (ieee80211_vif_is_mesh(&sdata->vif))
690 ieee80211_mesh_teardown_sdata(sdata);
693 static void ieee80211_uninit(struct net_device *dev)
695 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
698 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
700 struct net_device *sb_dev)
702 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
706 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
708 dev_fetch_sw_netstats(stats, dev->tstats);
711 static const struct net_device_ops ieee80211_dataif_ops = {
712 .ndo_open = ieee80211_open,
713 .ndo_stop = ieee80211_stop,
714 .ndo_uninit = ieee80211_uninit,
715 .ndo_start_xmit = ieee80211_subif_start_xmit,
716 .ndo_set_rx_mode = ieee80211_set_multicast_list,
717 .ndo_set_mac_address = ieee80211_change_mac,
718 .ndo_select_queue = ieee80211_netdev_select_queue,
719 .ndo_get_stats64 = ieee80211_get_stats64,
722 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
724 struct net_device *sb_dev)
726 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
727 struct ieee80211_local *local = sdata->local;
728 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
729 struct ieee80211_hdr *hdr;
732 if (local->hw.queues < IEEE80211_NUM_ACS)
735 /* reset flags and info before parsing radiotap header */
736 memset(info, 0, sizeof(*info));
738 if (!ieee80211_parse_tx_radiotap(skb, dev))
739 return 0; /* doesn't matter, frame will be dropped */
741 len_rthdr = ieee80211_get_radiotap_len(skb->data);
742 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
743 if (skb->len < len_rthdr + 2 ||
744 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
745 return 0; /* doesn't matter, frame will be dropped */
747 return ieee80211_select_queue_80211(sdata, skb, hdr);
750 static const struct net_device_ops ieee80211_monitorif_ops = {
751 .ndo_open = ieee80211_open,
752 .ndo_stop = ieee80211_stop,
753 .ndo_uninit = ieee80211_uninit,
754 .ndo_start_xmit = ieee80211_monitor_start_xmit,
755 .ndo_set_rx_mode = ieee80211_set_multicast_list,
756 .ndo_set_mac_address = ieee80211_change_mac,
757 .ndo_select_queue = ieee80211_monitor_select_queue,
758 .ndo_get_stats64 = ieee80211_get_stats64,
761 static const struct net_device_ops ieee80211_dataif_8023_ops = {
762 .ndo_open = ieee80211_open,
763 .ndo_stop = ieee80211_stop,
764 .ndo_uninit = ieee80211_uninit,
765 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
766 .ndo_set_rx_mode = ieee80211_set_multicast_list,
767 .ndo_set_mac_address = ieee80211_change_mac,
768 .ndo_select_queue = ieee80211_netdev_select_queue,
769 .ndo_get_stats64 = ieee80211_get_stats64,
772 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
775 /* P2P GO and client are mapped to AP/STATION types */
776 case NL80211_IFTYPE_AP:
777 case NL80211_IFTYPE_STATION:
784 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
786 struct ieee80211_local *local = sdata->local;
789 flags = sdata->vif.offload_flags;
791 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
792 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
793 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
795 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
796 local->hw.wiphy->frag_threshold != (u32)-1)
797 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
800 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
802 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
805 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
806 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
807 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
809 if (local->monitors &&
810 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
811 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
813 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
816 if (sdata->vif.offload_flags == flags)
819 sdata->vif.offload_flags = flags;
820 ieee80211_check_fast_rx_iface(sdata);
824 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
826 struct ieee80211_local *local = sdata->local;
827 struct ieee80211_sub_if_data *bss = sdata;
830 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
834 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
837 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
838 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
841 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
842 if (sdata->wdev.use_4addr &&
843 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
846 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
847 &ieee80211_dataif_ops;
850 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
852 struct ieee80211_local *local = sdata->local;
853 struct ieee80211_sub_if_data *vsdata;
855 if (ieee80211_set_sdata_offload_flags(sdata)) {
856 drv_update_vif_offload(local, sdata);
857 ieee80211_set_vif_encap_ops(sdata);
860 list_for_each_entry(vsdata, &local->interfaces, list) {
861 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
862 vsdata->bss != &sdata->u.ap)
865 ieee80211_set_vif_encap_ops(vsdata);
869 void ieee80211_recalc_offload(struct ieee80211_local *local)
871 struct ieee80211_sub_if_data *sdata;
873 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
876 mutex_lock(&local->iflist_mtx);
878 list_for_each_entry(sdata, &local->interfaces, list) {
879 if (!ieee80211_sdata_running(sdata))
882 ieee80211_recalc_sdata_offload(sdata);
885 mutex_unlock(&local->iflist_mtx);
888 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
891 struct ieee80211_local *local = sdata->local;
892 u32 flags = sdata->u.mntr.flags;
894 #define ADJUST(_f, _s) do { \
895 if (flags & MONITOR_FLAG_##_f) \
896 local->fif_##_s += offset; \
899 ADJUST(FCSFAIL, fcsfail);
900 ADJUST(PLCPFAIL, plcpfail);
901 ADJUST(CONTROL, control);
902 ADJUST(CONTROL, pspoll);
903 ADJUST(OTHER_BSS, other_bss);
908 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
910 struct ieee80211_local *local = sdata->local;
913 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
914 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
915 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
916 else if (local->hw.queues >= IEEE80211_NUM_ACS)
917 sdata->vif.hw_queue[i] = i;
919 sdata->vif.hw_queue[i] = 0;
921 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
924 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
926 struct ieee80211_sub_if_data *sdata;
929 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
934 if (local->monitor_sdata)
937 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
942 sdata->local = local;
943 sdata->vif.type = NL80211_IFTYPE_MONITOR;
944 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
945 wiphy_name(local->hw.wiphy));
946 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
948 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
950 ieee80211_set_default_queues(sdata);
952 ret = drv_add_interface(local, sdata);
954 /* ok .. stupid driver, it asked for this! */
959 set_bit(SDATA_STATE_RUNNING, &sdata->state);
961 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
967 mutex_lock(&local->iflist_mtx);
968 rcu_assign_pointer(local->monitor_sdata, sdata);
969 mutex_unlock(&local->iflist_mtx);
971 mutex_lock(&local->mtx);
972 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
973 IEEE80211_CHANCTX_EXCLUSIVE);
974 mutex_unlock(&local->mtx);
976 mutex_lock(&local->iflist_mtx);
977 RCU_INIT_POINTER(local->monitor_sdata, NULL);
978 mutex_unlock(&local->iflist_mtx);
980 drv_remove_interface(local, sdata);
985 skb_queue_head_init(&sdata->skb_queue);
986 INIT_WORK(&sdata->work, ieee80211_iface_work);
991 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
993 struct ieee80211_sub_if_data *sdata;
995 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1000 mutex_lock(&local->iflist_mtx);
1002 sdata = rcu_dereference_protected(local->monitor_sdata,
1003 lockdep_is_held(&local->iflist_mtx));
1005 mutex_unlock(&local->iflist_mtx);
1009 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1010 mutex_unlock(&local->iflist_mtx);
1014 mutex_lock(&local->mtx);
1015 ieee80211_vif_release_channel(sdata);
1016 mutex_unlock(&local->mtx);
1018 drv_remove_interface(local, sdata);
1024 * NOTE: Be very careful when changing this function, it must NOT return
1025 * an error on interface type changes that have been pre-checked, so most
1026 * checks should be in ieee80211_check_concurrent_iface.
1028 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1030 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1031 struct net_device *dev = wdev->netdev;
1032 struct ieee80211_local *local = sdata->local;
1035 u32 hw_reconf_flags = 0;
1037 switch (sdata->vif.type) {
1038 case NL80211_IFTYPE_AP_VLAN: {
1039 struct ieee80211_sub_if_data *master;
1044 mutex_lock(&local->mtx);
1045 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1046 mutex_unlock(&local->mtx);
1048 master = container_of(sdata->bss,
1049 struct ieee80211_sub_if_data, u.ap);
1050 sdata->control_port_protocol =
1051 master->control_port_protocol;
1052 sdata->control_port_no_encrypt =
1053 master->control_port_no_encrypt;
1054 sdata->control_port_over_nl80211 =
1055 master->control_port_over_nl80211;
1056 sdata->control_port_no_preauth =
1057 master->control_port_no_preauth;
1058 sdata->vif.cab_queue = master->vif.cab_queue;
1059 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1060 sizeof(sdata->vif.hw_queue));
1061 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1063 mutex_lock(&local->key_mtx);
1064 sdata->crypto_tx_tailroom_needed_cnt +=
1065 master->crypto_tx_tailroom_needed_cnt;
1066 mutex_unlock(&local->key_mtx);
1070 case NL80211_IFTYPE_AP:
1071 sdata->bss = &sdata->u.ap;
1073 case NL80211_IFTYPE_MESH_POINT:
1074 case NL80211_IFTYPE_STATION:
1075 case NL80211_IFTYPE_MONITOR:
1076 case NL80211_IFTYPE_ADHOC:
1077 case NL80211_IFTYPE_P2P_DEVICE:
1078 case NL80211_IFTYPE_OCB:
1079 case NL80211_IFTYPE_NAN:
1080 /* no special treatment */
1082 case NL80211_IFTYPE_UNSPECIFIED:
1083 case NUM_NL80211_IFTYPES:
1084 case NL80211_IFTYPE_P2P_CLIENT:
1085 case NL80211_IFTYPE_P2P_GO:
1086 case NL80211_IFTYPE_WDS:
1092 if (local->open_count == 0) {
1093 res = drv_start(local);
1096 /* we're brought up, everything changes */
1097 hw_reconf_flags = ~0;
1098 ieee80211_led_radio(local, true);
1099 ieee80211_mod_tpt_led_trig(local,
1100 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1104 * Copy the hopefully now-present MAC address to
1105 * this interface, if it has the special null one.
1107 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1108 memcpy(dev->dev_addr,
1109 local->hw.wiphy->perm_addr,
1111 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1113 if (!is_valid_ether_addr(dev->dev_addr)) {
1114 res = -EADDRNOTAVAIL;
1119 switch (sdata->vif.type) {
1120 case NL80211_IFTYPE_AP_VLAN:
1121 /* no need to tell driver, but set carrier and chanctx */
1122 if (rtnl_dereference(sdata->bss->beacon)) {
1123 ieee80211_vif_vlan_copy_chanctx(sdata);
1124 netif_carrier_on(dev);
1125 ieee80211_set_vif_encap_ops(sdata);
1127 netif_carrier_off(dev);
1130 case NL80211_IFTYPE_MONITOR:
1131 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1132 local->cooked_mntrs++;
1136 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1137 res = drv_add_interface(local, sdata);
1140 } else if (local->monitors == 0 && local->open_count == 0) {
1141 res = ieee80211_add_virtual_monitor(local);
1146 /* must be before the call to ieee80211_configure_filter */
1148 if (local->monitors == 1) {
1149 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1150 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1153 ieee80211_adjust_monitor_flags(sdata, 1);
1154 ieee80211_configure_filter(local);
1155 ieee80211_recalc_offload(local);
1156 mutex_lock(&local->mtx);
1157 ieee80211_recalc_idle(local);
1158 mutex_unlock(&local->mtx);
1160 netif_carrier_on(dev);
1164 ieee80211_del_virtual_monitor(local);
1165 ieee80211_set_sdata_offload_flags(sdata);
1167 res = drv_add_interface(local, sdata);
1171 ieee80211_set_vif_encap_ops(sdata);
1172 res = ieee80211_check_queues(sdata,
1173 ieee80211_vif_type_p2p(&sdata->vif));
1175 goto err_del_interface;
1178 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1179 local->fif_pspoll++;
1180 local->fif_probe_req++;
1182 ieee80211_configure_filter(local);
1183 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1184 local->fif_probe_req++;
1187 if (sdata->vif.probe_req_reg)
1188 drv_config_iface_filter(local, sdata,
1192 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1193 sdata->vif.type != NL80211_IFTYPE_NAN)
1194 changed |= ieee80211_reset_erp_info(sdata);
1195 ieee80211_bss_info_change_notify(sdata, changed);
1197 switch (sdata->vif.type) {
1198 case NL80211_IFTYPE_STATION:
1199 case NL80211_IFTYPE_ADHOC:
1200 case NL80211_IFTYPE_AP:
1201 case NL80211_IFTYPE_MESH_POINT:
1202 case NL80211_IFTYPE_OCB:
1203 netif_carrier_off(dev);
1205 case NL80211_IFTYPE_P2P_DEVICE:
1206 case NL80211_IFTYPE_NAN:
1214 * Set default queue parameters so drivers don't
1215 * need to initialise the hardware if the hardware
1216 * doesn't start up with sane defaults.
1217 * Enable QoS for anything but station interfaces.
1219 ieee80211_set_wmm_default(sdata, true,
1220 sdata->vif.type != NL80211_IFTYPE_STATION);
1223 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1225 switch (sdata->vif.type) {
1226 case NL80211_IFTYPE_P2P_DEVICE:
1227 rcu_assign_pointer(local->p2p_sdata, sdata);
1229 case NL80211_IFTYPE_MONITOR:
1230 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1232 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1239 * set_multicast_list will be invoked by the networking core
1240 * which will check whether any increments here were done in
1241 * error and sync them down to the hardware as filter flags.
1243 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1244 atomic_inc(&local->iff_allmultis);
1247 local->open_count++;
1249 if (hw_reconf_flags)
1250 ieee80211_hw_config(local, hw_reconf_flags);
1252 ieee80211_recalc_ps(local);
1254 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1255 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1256 local->ops->wake_tx_queue) {
1257 /* XXX: for AP_VLAN, actually track AP queues */
1259 netif_tx_start_all_queues(dev);
1261 unsigned long flags;
1262 int n_acs = IEEE80211_NUM_ACS;
1265 if (local->hw.queues < IEEE80211_NUM_ACS)
1268 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1269 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1270 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1271 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1272 for (ac = 0; ac < n_acs; ac++) {
1273 int ac_queue = sdata->vif.hw_queue[ac];
1275 if (local->queue_stop_reasons[ac_queue] == 0 &&
1276 skb_queue_empty(&local->pending[ac_queue]))
1277 netif_start_subqueue(dev, ac);
1280 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1285 drv_remove_interface(local, sdata);
1287 if (!local->open_count)
1291 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1292 mutex_lock(&local->mtx);
1293 list_del(&sdata->u.vlan.list);
1294 mutex_unlock(&local->mtx);
1296 /* might already be clear but that doesn't matter */
1297 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1301 static void ieee80211_if_free(struct net_device *dev)
1303 free_percpu(dev->tstats);
1306 static void ieee80211_if_setup(struct net_device *dev)
1309 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1310 dev->netdev_ops = &ieee80211_dataif_ops;
1311 dev->needs_free_netdev = true;
1312 dev->priv_destructor = ieee80211_if_free;
1315 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1317 ieee80211_if_setup(dev);
1318 dev->priv_flags |= IFF_NO_QUEUE;
1321 static void ieee80211_iface_work(struct work_struct *work)
1323 struct ieee80211_sub_if_data *sdata =
1324 container_of(work, struct ieee80211_sub_if_data, work);
1325 struct ieee80211_local *local = sdata->local;
1326 struct sk_buff *skb;
1327 struct sta_info *sta;
1329 if (!ieee80211_sdata_running(sdata))
1332 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1335 if (!ieee80211_can_run_worker(local))
1338 /* first process frames */
1339 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1340 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1342 kcov_remote_start_common(skb_get_kcov_handle(skb));
1343 if (ieee80211_is_action(mgmt->frame_control) &&
1344 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1347 mutex_lock(&local->sta_mtx);
1348 sta = sta_info_get_bss(sdata, mgmt->sa);
1350 switch (mgmt->u.action.u.addba_req.action_code) {
1351 case WLAN_ACTION_ADDBA_REQ:
1352 ieee80211_process_addba_request(
1353 local, sta, mgmt, len);
1355 case WLAN_ACTION_ADDBA_RESP:
1356 ieee80211_process_addba_resp(local, sta,
1359 case WLAN_ACTION_DELBA:
1360 ieee80211_process_delba(sdata, sta,
1368 mutex_unlock(&local->sta_mtx);
1369 } else if (ieee80211_is_action(mgmt->frame_control) &&
1370 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1371 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1372 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1373 struct ieee80211_rx_status *status;
1374 enum nl80211_band band;
1377 status = IEEE80211_SKB_RXCB(skb);
1378 band = status->band;
1379 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1381 mutex_lock(&local->sta_mtx);
1382 sta = sta_info_get_bss(sdata, mgmt->sa);
1385 ieee80211_vht_handle_opmode(sdata, sta,
1389 mutex_unlock(&local->sta_mtx);
1392 case WLAN_VHT_ACTION_GROUPID_MGMT:
1393 ieee80211_process_mu_groups(sdata, mgmt);
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;
1407 * So the frame isn't mgmt, but frame_control
1408 * is at the right place anyway, of course, so
1409 * the if statement is correct.
1411 * Warn if we have other data frame types here,
1412 * they must not get here.
1414 WARN_ON(hdr->frame_control &
1415 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1416 WARN_ON(!(hdr->seq_ctrl &
1417 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1419 * This was a fragment of a frame, received while
1420 * a block-ack session was active. That cannot be
1421 * right, so terminate the session.
1423 mutex_lock(&local->sta_mtx);
1424 sta = sta_info_get_bss(sdata, mgmt->sa);
1426 u16 tid = ieee80211_get_tid(hdr);
1428 __ieee80211_stop_rx_ba_session(
1429 sta, tid, WLAN_BACK_RECIPIENT,
1430 WLAN_REASON_QSTA_REQUIRE_SETUP,
1433 mutex_unlock(&local->sta_mtx);
1434 } else switch (sdata->vif.type) {
1435 case NL80211_IFTYPE_STATION:
1436 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1438 case NL80211_IFTYPE_ADHOC:
1439 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1441 case NL80211_IFTYPE_MESH_POINT:
1442 if (!ieee80211_vif_is_mesh(&sdata->vif))
1444 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1447 WARN(1, "frame for unexpected interface type");
1455 /* then other type-dependent work */
1456 switch (sdata->vif.type) {
1457 case NL80211_IFTYPE_STATION:
1458 ieee80211_sta_work(sdata);
1460 case NL80211_IFTYPE_ADHOC:
1461 ieee80211_ibss_work(sdata);
1463 case NL80211_IFTYPE_MESH_POINT:
1464 if (!ieee80211_vif_is_mesh(&sdata->vif))
1466 ieee80211_mesh_work(sdata);
1468 case NL80211_IFTYPE_OCB:
1469 ieee80211_ocb_work(sdata);
1476 static void ieee80211_recalc_smps_work(struct work_struct *work)
1478 struct ieee80211_sub_if_data *sdata =
1479 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1481 ieee80211_recalc_smps(sdata);
1485 * Helper function to initialise an interface to a specific type.
1487 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1488 enum nl80211_iftype type)
1490 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1493 /* clear type-dependent union */
1494 memset(&sdata->u, 0, sizeof(sdata->u));
1496 /* and set some type-dependent values */
1497 sdata->vif.type = type;
1498 sdata->vif.p2p = false;
1499 sdata->wdev.iftype = type;
1501 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1502 sdata->control_port_no_encrypt = false;
1503 sdata->control_port_over_nl80211 = false;
1504 sdata->control_port_no_preauth = false;
1505 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1506 sdata->vif.bss_conf.idle = true;
1507 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1509 sdata->noack_map = 0;
1511 /* only monitor/p2p-device differ */
1513 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1514 sdata->dev->type = ARPHRD_ETHER;
1517 skb_queue_head_init(&sdata->skb_queue);
1518 INIT_WORK(&sdata->work, ieee80211_iface_work);
1519 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1520 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1521 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1522 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1525 case NL80211_IFTYPE_P2P_GO:
1526 type = NL80211_IFTYPE_AP;
1527 sdata->vif.type = type;
1528 sdata->vif.p2p = true;
1530 case NL80211_IFTYPE_AP:
1531 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1532 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1533 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1535 case NL80211_IFTYPE_P2P_CLIENT:
1536 type = NL80211_IFTYPE_STATION;
1537 sdata->vif.type = type;
1538 sdata->vif.p2p = true;
1540 case NL80211_IFTYPE_STATION:
1541 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1542 ieee80211_sta_setup_sdata(sdata);
1544 case NL80211_IFTYPE_OCB:
1545 sdata->vif.bss_conf.bssid = bssid_wildcard;
1546 ieee80211_ocb_setup_sdata(sdata);
1548 case NL80211_IFTYPE_ADHOC:
1549 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1550 ieee80211_ibss_setup_sdata(sdata);
1552 case NL80211_IFTYPE_MESH_POINT:
1553 if (ieee80211_vif_is_mesh(&sdata->vif))
1554 ieee80211_mesh_init_sdata(sdata);
1556 case NL80211_IFTYPE_MONITOR:
1557 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1558 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1559 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1560 MONITOR_FLAG_OTHER_BSS;
1562 case NL80211_IFTYPE_NAN:
1563 idr_init(&sdata->u.nan.function_inst_ids);
1564 spin_lock_init(&sdata->u.nan.func_lock);
1565 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1567 case NL80211_IFTYPE_AP_VLAN:
1568 case NL80211_IFTYPE_P2P_DEVICE:
1569 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1571 case NL80211_IFTYPE_UNSPECIFIED:
1572 case NL80211_IFTYPE_WDS:
1573 case NUM_NL80211_IFTYPES:
1578 ieee80211_debugfs_add_netdev(sdata);
1581 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1582 enum nl80211_iftype type)
1584 struct ieee80211_local *local = sdata->local;
1586 enum nl80211_iftype internal_type = type;
1591 if (!local->ops->change_interface)
1594 switch (sdata->vif.type) {
1595 case NL80211_IFTYPE_AP:
1596 if (!list_empty(&sdata->u.ap.vlans))
1599 case NL80211_IFTYPE_STATION:
1600 case NL80211_IFTYPE_ADHOC:
1601 case NL80211_IFTYPE_OCB:
1603 * Could maybe also all others here?
1604 * Just not sure how that interacts
1605 * with the RX/config path e.g. for
1614 case NL80211_IFTYPE_AP:
1615 case NL80211_IFTYPE_STATION:
1616 case NL80211_IFTYPE_ADHOC:
1617 case NL80211_IFTYPE_OCB:
1619 * Could probably support everything
1623 case NL80211_IFTYPE_P2P_CLIENT:
1625 internal_type = NL80211_IFTYPE_STATION;
1627 case NL80211_IFTYPE_P2P_GO:
1629 internal_type = NL80211_IFTYPE_AP;
1635 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1639 ieee80211_stop_vif_queues(local, sdata,
1640 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1643 ieee80211_do_stop(sdata, false);
1645 ieee80211_teardown_sdata(sdata);
1647 ieee80211_set_sdata_offload_flags(sdata);
1648 ret = drv_change_interface(local, sdata, internal_type, p2p);
1650 type = ieee80211_vif_type_p2p(&sdata->vif);
1653 * Ignore return value here, there's not much we can do since
1654 * the driver changed the interface type internally already.
1655 * The warnings will hopefully make driver authors fix it :-)
1657 ieee80211_check_queues(sdata, type);
1659 ieee80211_setup_sdata(sdata, type);
1660 ieee80211_set_vif_encap_ops(sdata);
1662 err = ieee80211_do_open(&sdata->wdev, false);
1663 WARN(err, "type change: do_open returned %d", err);
1665 ieee80211_wake_vif_queues(local, sdata,
1666 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1670 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1671 enum nl80211_iftype type)
1677 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1680 if (ieee80211_sdata_running(sdata)) {
1681 ret = ieee80211_runtime_change_iftype(sdata, type);
1685 /* Purge and reset type-dependent state. */
1686 ieee80211_teardown_sdata(sdata);
1687 ieee80211_setup_sdata(sdata, type);
1690 /* reset some values that shouldn't be kept across type changes */
1691 if (type == NL80211_IFTYPE_STATION)
1692 sdata->u.mgd.use_4addr = false;
1697 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1698 u8 *perm_addr, enum nl80211_iftype type)
1700 struct ieee80211_sub_if_data *sdata;
1701 u64 mask, start, addr, val, inc;
1703 u8 tmp_addr[ETH_ALEN];
1706 /* default ... something at least */
1707 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1709 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1710 local->hw.wiphy->n_addresses <= 1)
1713 mutex_lock(&local->iflist_mtx);
1716 case NL80211_IFTYPE_MONITOR:
1717 /* doesn't matter */
1719 case NL80211_IFTYPE_AP_VLAN:
1720 /* match up with an AP interface */
1721 list_for_each_entry(sdata, &local->interfaces, list) {
1722 if (sdata->vif.type != NL80211_IFTYPE_AP)
1724 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1727 /* keep default if no AP interface present */
1729 case NL80211_IFTYPE_P2P_CLIENT:
1730 case NL80211_IFTYPE_P2P_GO:
1731 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1732 list_for_each_entry(sdata, &local->interfaces, list) {
1733 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1735 if (!ieee80211_sdata_running(sdata))
1737 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1743 /* assign a new address if possible -- try n_addresses first */
1744 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1747 list_for_each_entry(sdata, &local->interfaces, list) {
1748 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1757 local->hw.wiphy->addresses[i].addr,
1763 /* try mask if available */
1764 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1767 m = local->hw.wiphy->addr_mask;
1768 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1769 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1770 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1772 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1773 /* not a contiguous mask ... not handled now! */
1774 pr_info("not contiguous\n");
1779 * Pick address of existing interface in case user changed
1780 * MAC address manually, default to perm_addr.
1782 m = local->hw.wiphy->perm_addr;
1783 list_for_each_entry(sdata, &local->interfaces, list) {
1784 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1786 m = sdata->vif.addr;
1789 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1790 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1791 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1793 inc = 1ULL<<__ffs64(mask);
1794 val = (start & mask);
1795 addr = (start & ~mask) | (val & mask);
1799 tmp_addr[5] = addr >> 0*8;
1800 tmp_addr[4] = addr >> 1*8;
1801 tmp_addr[3] = addr >> 2*8;
1802 tmp_addr[2] = addr >> 3*8;
1803 tmp_addr[1] = addr >> 4*8;
1804 tmp_addr[0] = addr >> 5*8;
1808 list_for_each_entry(sdata, &local->interfaces, list) {
1809 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1816 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1819 addr = (start & ~mask) | (val & mask);
1820 } while (addr != start);
1826 mutex_unlock(&local->iflist_mtx);
1829 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1830 unsigned char name_assign_type,
1831 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1832 struct vif_params *params)
1834 struct net_device *ndev = NULL;
1835 struct ieee80211_sub_if_data *sdata = NULL;
1836 struct txq_info *txqi;
1837 void (*if_setup)(struct net_device *dev);
1843 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1844 struct wireless_dev *wdev;
1846 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1850 wdev = &sdata->wdev;
1853 strlcpy(sdata->name, name, IFNAMSIZ);
1854 ieee80211_assign_perm_addr(local, wdev->address, type);
1855 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1857 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1861 if (local->ops->wake_tx_queue &&
1862 type != NL80211_IFTYPE_AP_VLAN &&
1863 (type != NL80211_IFTYPE_MONITOR ||
1864 (params->flags & MONITOR_FLAG_ACTIVE)))
1865 txq_size += sizeof(struct txq_info) +
1866 local->hw.txq_data_size;
1868 if (local->ops->wake_tx_queue) {
1869 if_setup = ieee80211_if_setup_no_queue;
1871 if_setup = ieee80211_if_setup;
1872 if (local->hw.queues >= IEEE80211_NUM_ACS)
1873 txqs = IEEE80211_NUM_ACS;
1876 ndev = alloc_netdev_mqs(size + txq_size,
1877 name, name_assign_type,
1882 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1883 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1885 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1887 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1888 if (!ndev->tstats) {
1893 ndev->needed_headroom = local->tx_headroom +
1894 4*6 /* four MAC addresses */
1895 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1897 + 8 /* rfc1042/bridge tunnel */
1898 - ETH_HLEN /* ethernet hard_header_len */
1899 + IEEE80211_ENCRYPT_HEADROOM;
1900 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1902 ret = dev_alloc_name(ndev, ndev->name);
1904 ieee80211_if_free(ndev);
1909 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1910 if (is_valid_ether_addr(params->macaddr))
1911 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1913 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1914 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1916 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1917 sdata = netdev_priv(ndev);
1918 ndev->ieee80211_ptr = &sdata->wdev;
1919 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1920 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1923 txqi = netdev_priv(ndev) + size;
1924 ieee80211_txq_init(sdata, NULL, txqi, 0);
1930 /* initialise type-independent data */
1931 sdata->wdev.wiphy = local->hw.wiphy;
1932 sdata->local = local;
1934 ieee80211_init_frag_cache(&sdata->frags);
1936 INIT_LIST_HEAD(&sdata->key_list);
1938 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1939 ieee80211_dfs_cac_timer_work);
1940 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1941 ieee80211_delayed_tailroom_dec);
1943 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1944 struct ieee80211_supported_band *sband;
1945 sband = local->hw.wiphy->bands[i];
1946 sdata->rc_rateidx_mask[i] =
1947 sband ? (1 << sband->n_bitrates) - 1 : 0;
1952 memcpy(sdata->rc_rateidx_mcs_mask[i],
1953 sband->ht_cap.mcs.rx_mask,
1954 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1956 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1957 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1958 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1960 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1961 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1962 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1963 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1967 ieee80211_set_default_queues(sdata);
1969 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1970 sdata->user_power_level = local->user_power_level;
1972 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1974 /* setup type-dependent data */
1975 ieee80211_setup_sdata(sdata, type);
1978 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1979 if (type == NL80211_IFTYPE_STATION)
1980 sdata->u.mgd.use_4addr = params->use_4addr;
1982 ndev->features |= local->hw.netdev_features;
1983 ndev->hw_features |= ndev->features &
1984 MAC80211_SUPPORTED_FEATURES_TX;
1986 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1988 /* MTU range: 256 - 2304 */
1989 ndev->min_mtu = 256;
1990 ndev->max_mtu = local->hw.max_mtu;
1992 ret = cfg80211_register_netdevice(ndev);
1999 mutex_lock(&local->iflist_mtx);
2000 list_add_tail_rcu(&sdata->list, &local->interfaces);
2001 mutex_unlock(&local->iflist_mtx);
2004 *new_wdev = &sdata->wdev;
2009 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2013 mutex_lock(&sdata->local->iflist_mtx);
2014 list_del_rcu(&sdata->list);
2015 mutex_unlock(&sdata->local->iflist_mtx);
2018 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2022 cfg80211_unregister_wdev(&sdata->wdev);
2025 ieee80211_teardown_sdata(sdata);
2030 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2032 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2034 ieee80211_do_stop(sdata, true);
2037 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2039 struct ieee80211_sub_if_data *sdata, *tmp;
2040 LIST_HEAD(unreg_list);
2041 LIST_HEAD(wdev_list);
2045 /* Before destroying the interfaces, make sure they're all stopped so
2046 * that the hardware is stopped. Otherwise, the driver might still be
2047 * iterating the interfaces during the shutdown, e.g. from a worker
2048 * or from RX processing or similar, and if it does so (using atomic
2049 * iteration) while we're manipulating the list, the iteration will
2052 * After this, the hardware should be stopped and the driver should
2053 * have stopped all of its activities, so that we can do RCU-unaware
2054 * manipulations of the interface list below.
2056 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2058 WARN(local->open_count, "%s: open count remains %d\n",
2059 wiphy_name(local->hw.wiphy), local->open_count);
2061 ieee80211_txq_teardown_flows(local);
2063 mutex_lock(&local->iflist_mtx);
2064 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2065 list_del(&sdata->list);
2068 unregister_netdevice_queue(sdata->dev, &unreg_list);
2070 list_add(&sdata->list, &wdev_list);
2072 mutex_unlock(&local->iflist_mtx);
2074 unregister_netdevice_many(&unreg_list);
2076 wiphy_lock(local->hw.wiphy);
2077 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2078 list_del(&sdata->list);
2079 cfg80211_unregister_wdev(&sdata->wdev);
2082 wiphy_unlock(local->hw.wiphy);
2085 static int netdev_notify(struct notifier_block *nb,
2086 unsigned long state, void *ptr)
2088 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2089 struct ieee80211_sub_if_data *sdata;
2091 if (state != NETDEV_CHANGENAME)
2094 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2097 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2100 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2101 memcpy(sdata->name, dev->name, IFNAMSIZ);
2102 ieee80211_debugfs_rename_netdev(sdata);
2107 static struct notifier_block mac80211_netdev_notifier = {
2108 .notifier_call = netdev_notify,
2111 int ieee80211_iface_init(void)
2113 return register_netdevice_notifier(&mac80211_netdev_notifier);
2116 void ieee80211_iface_exit(void)
2118 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2121 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2123 if (sdata->vif.type == NL80211_IFTYPE_AP)
2124 atomic_inc(&sdata->u.ap.num_mcast_sta);
2125 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2126 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2129 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2131 if (sdata->vif.type == NL80211_IFTYPE_AP)
2132 atomic_dec(&sdata->u.ap.num_mcast_sta);
2133 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2134 atomic_dec(&sdata->u.vlan.num_mcast_sta);