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) 2018-2020 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 <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
22 #include "debugfs_netdev.h"
25 #include "driver-ops.h"
30 * DOC: Interface list locking
32 * The interface list in each struct ieee80211_local is protected
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
45 static void ieee80211_iface_work(struct work_struct *work);
47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
49 struct ieee80211_chanctx_conf *chanctx_conf;
53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
59 power = ieee80211_chandef_max_power(&chanctx_conf->def);
62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, sdata->user_power_level);
65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->ap_power_level);
68 if (power != sdata->vif.bss_conf.txpower) {
69 sdata->vif.bss_conf.txpower = power;
70 ieee80211_hw_config(sdata->local, 0);
77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
80 if (__ieee80211_recalc_txpower(sdata) ||
81 (update_bss && ieee80211_sdata_running(sdata)))
82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
85 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
91 return IEEE80211_CONF_CHANGE_IDLE;
94 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
99 ieee80211_flush_queues(local, NULL, false);
101 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
108 bool working, scanning, active;
109 unsigned int led_trig_start = 0, led_trig_stop = 0;
111 lockdep_assert_held(&local->mtx);
113 active = force_active ||
114 !list_empty(&local->chanctx_list) ||
117 working = !local->ops->remain_on_channel &&
118 !list_empty(&local->roc_list);
120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
123 if (working || scanning)
124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
135 if (working || scanning || active)
136 return __ieee80211_idle_off(local);
137 return __ieee80211_idle_on(local);
140 u32 ieee80211_idle_off(struct ieee80211_local *local)
142 return __ieee80211_recalc_idle(local, true);
145 void ieee80211_recalc_idle(struct ieee80211_local *local)
147 u32 change = __ieee80211_recalc_idle(local, false);
149 ieee80211_hw_config(local, change);
152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_sub_if_data *iter;
161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
169 m = local->hw.wiphy->addr_mask;
170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
177 mutex_lock(&local->iflist_mtx);
178 list_for_each_entry(iter, &local->interfaces, list) {
182 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
191 if ((new & ~mask) != (tmp & ~mask)) {
196 mutex_unlock(&local->iflist_mtx);
201 static int ieee80211_change_mac(struct net_device *dev, void *addr)
203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
204 struct sockaddr *sa = addr;
205 bool check_dup = true;
208 if (ieee80211_sdata_running(sdata))
211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
219 ret = eth_mac_addr(dev, sa);
222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
227 static inline int identical_mac_addr_allowed(int type1, int type2)
229 return type1 == NL80211_IFTYPE_MONITOR ||
230 type2 == NL80211_IFTYPE_MONITOR ||
231 type1 == NL80211_IFTYPE_P2P_DEVICE ||
232 type2 == NL80211_IFTYPE_P2P_DEVICE ||
233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
234 (type1 == NL80211_IFTYPE_AP_VLAN &&
235 (type2 == NL80211_IFTYPE_AP ||
236 type2 == NL80211_IFTYPE_AP_VLAN));
239 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
240 enum nl80211_iftype iftype)
242 struct ieee80211_local *local = sdata->local;
243 struct ieee80211_sub_if_data *nsdata;
248 /* we hold the RTNL here so can safely walk the list */
249 list_for_each_entry(nsdata, &local->interfaces, list) {
250 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
252 * Only OCB and monitor mode may coexist
254 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
255 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
256 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
257 nsdata->vif.type == NL80211_IFTYPE_OCB))
261 * Allow only a single IBSS interface to be up at any
262 * time. This is restricted because beacon distribution
263 * cannot work properly if both are in the same IBSS.
265 * To remove this restriction we'd have to disallow them
266 * from setting the same SSID on different IBSS interfaces
267 * belonging to the same hardware. Then, however, we're
268 * faced with having to adopt two different TSF timers...
270 if (iftype == NL80211_IFTYPE_ADHOC &&
271 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
274 * will not add another interface while any channel
277 if (nsdata->vif.csa_active)
281 * The remaining checks are only performed for interfaces
282 * with the same MAC address.
284 if (!ether_addr_equal(sdata->vif.addr,
289 * check whether it may have the same address
291 if (!identical_mac_addr_allowed(iftype,
296 * can only add VLANs to enabled APs
298 if (iftype == NL80211_IFTYPE_AP_VLAN &&
299 nsdata->vif.type == NL80211_IFTYPE_AP)
300 sdata->bss = &nsdata->u.ap;
304 mutex_lock(&local->chanctx_mtx);
305 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
306 mutex_unlock(&local->chanctx_mtx);
310 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
311 enum nl80211_iftype iftype)
313 int n_queues = sdata->local->hw.queues;
316 if (iftype == NL80211_IFTYPE_NAN)
319 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
320 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
322 IEEE80211_INVAL_HW_QUEUE))
324 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
330 if ((iftype != NL80211_IFTYPE_AP &&
331 iftype != NL80211_IFTYPE_P2P_GO &&
332 iftype != NL80211_IFTYPE_MESH_POINT) ||
333 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
334 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
338 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
341 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
347 static int ieee80211_open(struct net_device *dev)
349 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
352 /* fail early if user set an invalid address */
353 if (!is_valid_ether_addr(dev->dev_addr))
354 return -EADDRNOTAVAIL;
356 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
360 wiphy_lock(sdata->local->hw.wiphy);
361 err = ieee80211_do_open(&sdata->wdev, true);
362 wiphy_unlock(sdata->local->hw.wiphy);
367 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
369 struct ieee80211_local *local = sdata->local;
371 struct sk_buff *skb, *tmp;
372 u32 hw_reconf_flags = 0;
375 struct cfg80211_chan_def chandef;
377 struct cfg80211_nan_func *func;
379 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
381 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
383 ieee80211_scan_cancel(local);
386 * Stop TX on this interface first.
389 netif_tx_stop_all_queues(sdata->dev);
391 ieee80211_roc_purge(local, sdata);
393 switch (sdata->vif.type) {
394 case NL80211_IFTYPE_STATION:
395 ieee80211_mgd_stop(sdata);
397 case NL80211_IFTYPE_ADHOC:
398 ieee80211_ibss_stop(sdata);
400 case NL80211_IFTYPE_MONITOR:
401 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
403 list_del_rcu(&sdata->u.mntr.list);
410 * Remove all stations associated with this interface.
412 * This must be done before calling ops->remove_interface()
413 * because otherwise we can later invoke ops->sta_notify()
414 * whenever the STAs are removed, and that invalidates driver
415 * assumptions about always getting a vif pointer that is valid
416 * (because if we remove a STA after ops->remove_interface()
417 * the driver will have removed the vif info already!)
419 * For AP_VLANs stations may exist since there's nothing else that
420 * would have removed them, but in other modes there shouldn't
423 flushed = sta_info_flush(sdata);
424 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
426 /* don't count this interface for allmulti while it is down */
427 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
428 atomic_dec(&local->iff_allmultis);
430 if (sdata->vif.type == NL80211_IFTYPE_AP) {
432 local->fif_probe_req--;
433 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
434 local->fif_probe_req--;
438 netif_addr_lock_bh(sdata->dev);
439 spin_lock_bh(&local->filter_lock);
440 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
441 sdata->dev->addr_len);
442 spin_unlock_bh(&local->filter_lock);
443 netif_addr_unlock_bh(sdata->dev);
446 del_timer_sync(&local->dynamic_ps_timer);
447 cancel_work_sync(&local->dynamic_ps_enable_work);
449 cancel_work_sync(&sdata->recalc_smps);
451 mutex_lock(&local->mtx);
452 sdata->vif.csa_active = false;
453 if (sdata->vif.type == NL80211_IFTYPE_STATION)
454 sdata->u.mgd.csa_waiting_bcn = false;
455 if (sdata->csa_block_tx) {
456 ieee80211_wake_vif_queues(local, sdata,
457 IEEE80211_QUEUE_STOP_REASON_CSA);
458 sdata->csa_block_tx = false;
460 mutex_unlock(&local->mtx);
463 cancel_work_sync(&sdata->csa_finalize_work);
465 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
467 if (sdata->wdev.cac_started) {
468 chandef = sdata->vif.bss_conf.chandef;
469 WARN_ON(local->suspended);
470 mutex_lock(&local->mtx);
471 ieee80211_vif_release_channel(sdata);
472 mutex_unlock(&local->mtx);
473 cfg80211_cac_event(sdata->dev, &chandef,
474 NL80211_RADAR_CAC_ABORTED,
478 /* APs need special treatment */
479 if (sdata->vif.type == NL80211_IFTYPE_AP) {
480 struct ieee80211_sub_if_data *vlan, *tmpsdata;
482 /* down all dependent devices, that is VLANs */
483 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
485 dev_close(vlan->dev);
486 WARN_ON(!list_empty(&sdata->u.ap.vlans));
487 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
488 /* remove all packets in parent bc_buf pointing to this dev */
489 ps = &sdata->bss->ps;
491 spin_lock_irqsave(&ps->bc_buf.lock, flags);
492 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
493 if (skb->dev == sdata->dev) {
494 __skb_unlink(skb, &ps->bc_buf);
495 local->total_ps_buffered--;
496 ieee80211_free_txskb(&local->hw, skb);
499 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
505 switch (sdata->vif.type) {
506 case NL80211_IFTYPE_AP_VLAN:
507 mutex_lock(&local->mtx);
508 list_del(&sdata->u.vlan.list);
509 mutex_unlock(&local->mtx);
510 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
511 /* see comment in the default case below */
512 ieee80211_free_keys(sdata, true);
513 /* no need to tell driver */
515 case NL80211_IFTYPE_MONITOR:
516 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
517 local->cooked_mntrs--;
522 if (local->monitors == 0) {
523 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
524 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
527 ieee80211_adjust_monitor_flags(sdata, -1);
529 case NL80211_IFTYPE_NAN:
530 /* clean all the functions */
531 spin_lock_bh(&sdata->u.nan.func_lock);
533 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
534 idr_remove(&sdata->u.nan.function_inst_ids, i);
535 cfg80211_free_nan_func(func);
537 idr_destroy(&sdata->u.nan.function_inst_ids);
539 spin_unlock_bh(&sdata->u.nan.func_lock);
541 case NL80211_IFTYPE_P2P_DEVICE:
542 /* relies on synchronize_rcu() below */
543 RCU_INIT_POINTER(local->p2p_sdata, NULL);
546 cancel_work_sync(&sdata->work);
548 * When we get here, the interface is marked down.
549 * Free the remaining keys, if there are any
550 * (which can happen in AP mode if userspace sets
551 * keys before the interface is operating)
553 * Force the key freeing to always synchronize_net()
554 * to wait for the RX path in case it is using this
555 * interface enqueuing frames at this very time on
558 ieee80211_free_keys(sdata, true);
559 skb_queue_purge(&sdata->skb_queue);
562 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
563 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
564 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
565 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
566 if (info->control.vif == &sdata->vif) {
567 __skb_unlink(skb, &local->pending[i]);
568 ieee80211_free_txskb(&local->hw, skb);
572 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
574 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
575 ieee80211_txq_remove_vlan(local, sdata);
579 if (local->open_count == 0)
580 ieee80211_clear_tx_pending(local);
582 sdata->vif.bss_conf.beacon_int = 0;
585 * If the interface goes down while suspended, presumably because
586 * the device was unplugged and that happens before our resume,
587 * then the driver is already unconfigured and the remainder of
588 * this function isn't needed.
589 * XXX: what about WoWLAN? If the device has software state, e.g.
590 * memory allocated, it might expect teardown commands from
593 if (local->suspended) {
594 WARN_ON(local->wowlan);
595 WARN_ON(rtnl_dereference(local->monitor_sdata));
599 switch (sdata->vif.type) {
600 case NL80211_IFTYPE_AP_VLAN:
602 case NL80211_IFTYPE_MONITOR:
603 if (local->monitors == 0)
604 ieee80211_del_virtual_monitor(local);
606 mutex_lock(&local->mtx);
607 ieee80211_recalc_idle(local);
608 mutex_unlock(&local->mtx);
610 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
616 drv_remove_interface(local, sdata);
619 ieee80211_recalc_ps(local);
622 flush_delayed_work(&local->scan_work);
624 if (local->open_count == 0) {
625 ieee80211_stop_device(local);
627 /* no reconfiguring after stop! */
631 /* do after stop to avoid reconfiguring when we stop anyway */
632 ieee80211_configure_filter(local);
633 ieee80211_hw_config(local, hw_reconf_flags);
635 if (local->monitors == local->open_count)
636 ieee80211_add_virtual_monitor(local);
639 static int ieee80211_stop(struct net_device *dev)
641 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
643 wiphy_lock(sdata->local->hw.wiphy);
644 ieee80211_do_stop(sdata, true);
645 wiphy_unlock(sdata->local->hw.wiphy);
650 static void ieee80211_set_multicast_list(struct net_device *dev)
652 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
653 struct ieee80211_local *local = sdata->local;
654 int allmulti, sdata_allmulti;
656 allmulti = !!(dev->flags & IFF_ALLMULTI);
657 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
659 if (allmulti != sdata_allmulti) {
660 if (dev->flags & IFF_ALLMULTI)
661 atomic_inc(&local->iff_allmultis);
663 atomic_dec(&local->iff_allmultis);
664 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
667 spin_lock_bh(&local->filter_lock);
668 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
669 spin_unlock_bh(&local->filter_lock);
670 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
674 * Called when the netdev is removed or, by the code below, before
675 * the interface type changes.
677 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
681 /* free extra data */
682 ieee80211_free_keys(sdata, false);
684 ieee80211_debugfs_remove_netdev(sdata);
686 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
687 __skb_queue_purge(&sdata->fragments[i].skb_list);
688 sdata->fragment_next = 0;
690 if (ieee80211_vif_is_mesh(&sdata->vif))
691 ieee80211_mesh_teardown_sdata(sdata);
694 static void ieee80211_uninit(struct net_device *dev)
696 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
699 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
701 struct net_device *sb_dev)
703 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
707 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
709 dev_fetch_sw_netstats(stats, dev->tstats);
712 static const struct net_device_ops ieee80211_dataif_ops = {
713 .ndo_open = ieee80211_open,
714 .ndo_stop = ieee80211_stop,
715 .ndo_uninit = ieee80211_uninit,
716 .ndo_start_xmit = ieee80211_subif_start_xmit,
717 .ndo_set_rx_mode = ieee80211_set_multicast_list,
718 .ndo_set_mac_address = ieee80211_change_mac,
719 .ndo_select_queue = ieee80211_netdev_select_queue,
720 .ndo_get_stats64 = ieee80211_get_stats64,
723 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
725 struct net_device *sb_dev)
727 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
728 struct ieee80211_local *local = sdata->local;
729 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
730 struct ieee80211_hdr *hdr;
733 if (local->hw.queues < IEEE80211_NUM_ACS)
736 /* reset flags and info before parsing radiotap header */
737 memset(info, 0, sizeof(*info));
739 if (!ieee80211_parse_tx_radiotap(skb, dev))
740 return 0; /* doesn't matter, frame will be dropped */
742 len_rthdr = ieee80211_get_radiotap_len(skb->data);
743 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
744 if (skb->len < len_rthdr + 2 ||
745 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
746 return 0; /* doesn't matter, frame will be dropped */
748 return ieee80211_select_queue_80211(sdata, skb, hdr);
751 static const struct net_device_ops ieee80211_monitorif_ops = {
752 .ndo_open = ieee80211_open,
753 .ndo_stop = ieee80211_stop,
754 .ndo_uninit = ieee80211_uninit,
755 .ndo_start_xmit = ieee80211_monitor_start_xmit,
756 .ndo_set_rx_mode = ieee80211_set_multicast_list,
757 .ndo_set_mac_address = ieee80211_change_mac,
758 .ndo_select_queue = ieee80211_monitor_select_queue,
759 .ndo_get_stats64 = ieee80211_get_stats64,
762 static const struct net_device_ops ieee80211_dataif_8023_ops = {
763 .ndo_open = ieee80211_open,
764 .ndo_stop = ieee80211_stop,
765 .ndo_uninit = ieee80211_uninit,
766 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
767 .ndo_set_rx_mode = ieee80211_set_multicast_list,
768 .ndo_set_mac_address = ieee80211_change_mac,
769 .ndo_select_queue = ieee80211_netdev_select_queue,
770 .ndo_get_stats64 = ieee80211_get_stats64,
773 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
776 /* P2P GO and client are mapped to AP/STATION types */
777 case NL80211_IFTYPE_AP:
778 case NL80211_IFTYPE_STATION:
785 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
787 struct ieee80211_local *local = sdata->local;
790 flags = sdata->vif.offload_flags;
792 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
793 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
794 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
796 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
797 local->hw.wiphy->frag_threshold != (u32)-1)
798 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
801 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
803 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
806 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
807 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
808 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
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 case NL80211_IFTYPE_STATION:
1597 case NL80211_IFTYPE_ADHOC:
1598 case NL80211_IFTYPE_OCB:
1600 * Could maybe also all others here?
1601 * Just not sure how that interacts
1602 * with the RX/config path e.g. for
1611 case NL80211_IFTYPE_AP:
1612 case NL80211_IFTYPE_STATION:
1613 case NL80211_IFTYPE_ADHOC:
1614 case NL80211_IFTYPE_OCB:
1616 * Could probably support everything
1620 case NL80211_IFTYPE_P2P_CLIENT:
1622 internal_type = NL80211_IFTYPE_STATION;
1624 case NL80211_IFTYPE_P2P_GO:
1626 internal_type = NL80211_IFTYPE_AP;
1632 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1636 ieee80211_stop_vif_queues(local, sdata,
1637 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1640 ieee80211_do_stop(sdata, false);
1642 ieee80211_teardown_sdata(sdata);
1644 ieee80211_set_sdata_offload_flags(sdata);
1645 ret = drv_change_interface(local, sdata, internal_type, p2p);
1647 type = ieee80211_vif_type_p2p(&sdata->vif);
1650 * Ignore return value here, there's not much we can do since
1651 * the driver changed the interface type internally already.
1652 * The warnings will hopefully make driver authors fix it :-)
1654 ieee80211_check_queues(sdata, type);
1656 ieee80211_setup_sdata(sdata, type);
1657 ieee80211_set_vif_encap_ops(sdata);
1659 err = ieee80211_do_open(&sdata->wdev, false);
1660 WARN(err, "type change: do_open returned %d", err);
1662 ieee80211_wake_vif_queues(local, sdata,
1663 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1667 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1668 enum nl80211_iftype type)
1674 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1677 if (ieee80211_sdata_running(sdata)) {
1678 ret = ieee80211_runtime_change_iftype(sdata, type);
1682 /* Purge and reset type-dependent state. */
1683 ieee80211_teardown_sdata(sdata);
1684 ieee80211_setup_sdata(sdata, type);
1687 /* reset some values that shouldn't be kept across type changes */
1688 if (type == NL80211_IFTYPE_STATION)
1689 sdata->u.mgd.use_4addr = false;
1694 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1695 u8 *perm_addr, enum nl80211_iftype type)
1697 struct ieee80211_sub_if_data *sdata;
1698 u64 mask, start, addr, val, inc;
1700 u8 tmp_addr[ETH_ALEN];
1703 /* default ... something at least */
1704 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1706 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1707 local->hw.wiphy->n_addresses <= 1)
1710 mutex_lock(&local->iflist_mtx);
1713 case NL80211_IFTYPE_MONITOR:
1714 /* doesn't matter */
1716 case NL80211_IFTYPE_AP_VLAN:
1717 /* match up with an AP interface */
1718 list_for_each_entry(sdata, &local->interfaces, list) {
1719 if (sdata->vif.type != NL80211_IFTYPE_AP)
1721 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1724 /* keep default if no AP interface present */
1726 case NL80211_IFTYPE_P2P_CLIENT:
1727 case NL80211_IFTYPE_P2P_GO:
1728 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1729 list_for_each_entry(sdata, &local->interfaces, list) {
1730 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1732 if (!ieee80211_sdata_running(sdata))
1734 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1740 /* assign a new address if possible -- try n_addresses first */
1741 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1744 list_for_each_entry(sdata, &local->interfaces, list) {
1745 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1754 local->hw.wiphy->addresses[i].addr,
1760 /* try mask if available */
1761 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1764 m = local->hw.wiphy->addr_mask;
1765 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1766 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1767 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1769 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1770 /* not a contiguous mask ... not handled now! */
1771 pr_info("not contiguous\n");
1776 * Pick address of existing interface in case user changed
1777 * MAC address manually, default to perm_addr.
1779 m = local->hw.wiphy->perm_addr;
1780 list_for_each_entry(sdata, &local->interfaces, list) {
1781 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1783 m = sdata->vif.addr;
1786 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1787 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1788 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1790 inc = 1ULL<<__ffs64(mask);
1791 val = (start & mask);
1792 addr = (start & ~mask) | (val & mask);
1796 tmp_addr[5] = addr >> 0*8;
1797 tmp_addr[4] = addr >> 1*8;
1798 tmp_addr[3] = addr >> 2*8;
1799 tmp_addr[2] = addr >> 3*8;
1800 tmp_addr[1] = addr >> 4*8;
1801 tmp_addr[0] = addr >> 5*8;
1805 list_for_each_entry(sdata, &local->interfaces, list) {
1806 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1813 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1816 addr = (start & ~mask) | (val & mask);
1817 } while (addr != start);
1823 mutex_unlock(&local->iflist_mtx);
1826 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1827 unsigned char name_assign_type,
1828 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1829 struct vif_params *params)
1831 struct net_device *ndev = NULL;
1832 struct ieee80211_sub_if_data *sdata = NULL;
1833 struct txq_info *txqi;
1834 void (*if_setup)(struct net_device *dev);
1840 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1841 struct wireless_dev *wdev;
1843 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1847 wdev = &sdata->wdev;
1850 strlcpy(sdata->name, name, IFNAMSIZ);
1851 ieee80211_assign_perm_addr(local, wdev->address, type);
1852 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1854 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1858 if (local->ops->wake_tx_queue &&
1859 type != NL80211_IFTYPE_AP_VLAN &&
1860 (type != NL80211_IFTYPE_MONITOR ||
1861 (params->flags & MONITOR_FLAG_ACTIVE)))
1862 txq_size += sizeof(struct txq_info) +
1863 local->hw.txq_data_size;
1865 if (local->ops->wake_tx_queue) {
1866 if_setup = ieee80211_if_setup_no_queue;
1868 if_setup = ieee80211_if_setup;
1869 if (local->hw.queues >= IEEE80211_NUM_ACS)
1870 txqs = IEEE80211_NUM_ACS;
1873 ndev = alloc_netdev_mqs(size + txq_size,
1874 name, name_assign_type,
1879 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1880 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1882 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1884 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1885 if (!ndev->tstats) {
1890 ndev->needed_headroom = local->tx_headroom +
1891 4*6 /* four MAC addresses */
1892 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1894 + 8 /* rfc1042/bridge tunnel */
1895 - ETH_HLEN /* ethernet hard_header_len */
1896 + IEEE80211_ENCRYPT_HEADROOM;
1897 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1899 ret = dev_alloc_name(ndev, ndev->name);
1901 ieee80211_if_free(ndev);
1906 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1907 if (is_valid_ether_addr(params->macaddr))
1908 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1910 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1911 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1913 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1914 sdata = netdev_priv(ndev);
1915 ndev->ieee80211_ptr = &sdata->wdev;
1916 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1917 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1920 txqi = netdev_priv(ndev) + size;
1921 ieee80211_txq_init(sdata, NULL, txqi, 0);
1927 /* initialise type-independent data */
1928 sdata->wdev.wiphy = local->hw.wiphy;
1929 sdata->local = local;
1931 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1932 skb_queue_head_init(&sdata->fragments[i].skb_list);
1934 INIT_LIST_HEAD(&sdata->key_list);
1936 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1937 ieee80211_dfs_cac_timer_work);
1938 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1939 ieee80211_delayed_tailroom_dec);
1941 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1942 struct ieee80211_supported_band *sband;
1943 sband = local->hw.wiphy->bands[i];
1944 sdata->rc_rateidx_mask[i] =
1945 sband ? (1 << sband->n_bitrates) - 1 : 0;
1950 memcpy(sdata->rc_rateidx_mcs_mask[i],
1951 sband->ht_cap.mcs.rx_mask,
1952 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1954 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1955 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1956 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1958 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1959 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1960 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1961 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1965 ieee80211_set_default_queues(sdata);
1967 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1968 sdata->user_power_level = local->user_power_level;
1970 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1972 /* setup type-dependent data */
1973 ieee80211_setup_sdata(sdata, type);
1976 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1977 if (type == NL80211_IFTYPE_STATION)
1978 sdata->u.mgd.use_4addr = params->use_4addr;
1980 ndev->features |= local->hw.netdev_features;
1981 ndev->hw_features |= ndev->features &
1982 MAC80211_SUPPORTED_FEATURES_TX;
1984 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1986 /* MTU range: 256 - 2304 */
1987 ndev->min_mtu = 256;
1988 ndev->max_mtu = local->hw.max_mtu;
1990 ret = cfg80211_register_netdevice(ndev);
1997 mutex_lock(&local->iflist_mtx);
1998 list_add_tail_rcu(&sdata->list, &local->interfaces);
1999 mutex_unlock(&local->iflist_mtx);
2002 *new_wdev = &sdata->wdev;
2007 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2011 mutex_lock(&sdata->local->iflist_mtx);
2012 list_del_rcu(&sdata->list);
2013 mutex_unlock(&sdata->local->iflist_mtx);
2016 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2020 cfg80211_unregister_wdev(&sdata->wdev);
2023 ieee80211_teardown_sdata(sdata);
2028 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2030 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2032 ieee80211_do_stop(sdata, true);
2035 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2037 struct ieee80211_sub_if_data *sdata, *tmp;
2038 LIST_HEAD(unreg_list);
2039 LIST_HEAD(wdev_list);
2043 /* Before destroying the interfaces, make sure they're all stopped so
2044 * that the hardware is stopped. Otherwise, the driver might still be
2045 * iterating the interfaces during the shutdown, e.g. from a worker
2046 * or from RX processing or similar, and if it does so (using atomic
2047 * iteration) while we're manipulating the list, the iteration will
2050 * After this, the hardware should be stopped and the driver should
2051 * have stopped all of its activities, so that we can do RCU-unaware
2052 * manipulations of the interface list below.
2054 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2056 WARN(local->open_count, "%s: open count remains %d\n",
2057 wiphy_name(local->hw.wiphy), local->open_count);
2059 ieee80211_txq_teardown_flows(local);
2061 mutex_lock(&local->iflist_mtx);
2062 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2063 list_del(&sdata->list);
2066 unregister_netdevice_queue(sdata->dev, &unreg_list);
2068 list_add(&sdata->list, &wdev_list);
2070 mutex_unlock(&local->iflist_mtx);
2072 unregister_netdevice_many(&unreg_list);
2074 wiphy_lock(local->hw.wiphy);
2075 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2076 list_del(&sdata->list);
2077 cfg80211_unregister_wdev(&sdata->wdev);
2080 wiphy_unlock(local->hw.wiphy);
2083 static int netdev_notify(struct notifier_block *nb,
2084 unsigned long state, void *ptr)
2086 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2087 struct ieee80211_sub_if_data *sdata;
2089 if (state != NETDEV_CHANGENAME)
2092 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2095 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2098 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2099 memcpy(sdata->name, dev->name, IFNAMSIZ);
2100 ieee80211_debugfs_rename_netdev(sdata);
2105 static struct notifier_block mac80211_netdev_notifier = {
2106 .notifier_call = netdev_notify,
2109 int ieee80211_iface_init(void)
2111 return register_netdevice_notifier(&mac80211_netdev_notifier);
2114 void ieee80211_iface_exit(void)
2116 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2119 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2121 if (sdata->vif.type == NL80211_IFTYPE_AP)
2122 atomic_inc(&sdata->u.ap.num_mcast_sta);
2123 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2124 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2127 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2129 if (sdata->vif.type == NL80211_IFTYPE_AP)
2130 atomic_dec(&sdata->u.ap.num_mcast_sta);
2131 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2132 atomic_dec(&sdata->u.vlan.num_mcast_sta);