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;
810 if (local->monitors &&
811 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
812 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
814 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
817 if (sdata->vif.offload_flags == flags)
820 sdata->vif.offload_flags = flags;
821 ieee80211_check_fast_rx_iface(sdata);
825 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
827 struct ieee80211_local *local = sdata->local;
828 struct ieee80211_sub_if_data *bss = sdata;
831 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
835 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
838 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
839 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
842 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
843 if (sdata->wdev.use_4addr &&
844 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
847 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
848 &ieee80211_dataif_ops;
851 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
853 struct ieee80211_local *local = sdata->local;
854 struct ieee80211_sub_if_data *vsdata;
856 if (ieee80211_set_sdata_offload_flags(sdata)) {
857 drv_update_vif_offload(local, sdata);
858 ieee80211_set_vif_encap_ops(sdata);
861 list_for_each_entry(vsdata, &local->interfaces, list) {
862 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
863 vsdata->bss != &sdata->u.ap)
866 ieee80211_set_vif_encap_ops(vsdata);
870 void ieee80211_recalc_offload(struct ieee80211_local *local)
872 struct ieee80211_sub_if_data *sdata;
874 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
877 mutex_lock(&local->iflist_mtx);
879 list_for_each_entry(sdata, &local->interfaces, list) {
880 if (!ieee80211_sdata_running(sdata))
883 ieee80211_recalc_sdata_offload(sdata);
886 mutex_unlock(&local->iflist_mtx);
889 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
892 struct ieee80211_local *local = sdata->local;
893 u32 flags = sdata->u.mntr.flags;
895 #define ADJUST(_f, _s) do { \
896 if (flags & MONITOR_FLAG_##_f) \
897 local->fif_##_s += offset; \
900 ADJUST(FCSFAIL, fcsfail);
901 ADJUST(PLCPFAIL, plcpfail);
902 ADJUST(CONTROL, control);
903 ADJUST(CONTROL, pspoll);
904 ADJUST(OTHER_BSS, other_bss);
909 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
911 struct ieee80211_local *local = sdata->local;
914 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
915 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
916 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
917 else if (local->hw.queues >= IEEE80211_NUM_ACS)
918 sdata->vif.hw_queue[i] = i;
920 sdata->vif.hw_queue[i] = 0;
922 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
925 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
927 struct ieee80211_sub_if_data *sdata;
930 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
935 if (local->monitor_sdata)
938 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
943 sdata->local = local;
944 sdata->vif.type = NL80211_IFTYPE_MONITOR;
945 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
946 wiphy_name(local->hw.wiphy));
947 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
949 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
951 ieee80211_set_default_queues(sdata);
953 ret = drv_add_interface(local, sdata);
955 /* ok .. stupid driver, it asked for this! */
960 set_bit(SDATA_STATE_RUNNING, &sdata->state);
962 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
968 mutex_lock(&local->iflist_mtx);
969 rcu_assign_pointer(local->monitor_sdata, sdata);
970 mutex_unlock(&local->iflist_mtx);
972 mutex_lock(&local->mtx);
973 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
974 IEEE80211_CHANCTX_EXCLUSIVE);
975 mutex_unlock(&local->mtx);
977 mutex_lock(&local->iflist_mtx);
978 RCU_INIT_POINTER(local->monitor_sdata, NULL);
979 mutex_unlock(&local->iflist_mtx);
981 drv_remove_interface(local, sdata);
986 skb_queue_head_init(&sdata->skb_queue);
987 INIT_WORK(&sdata->work, ieee80211_iface_work);
992 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
994 struct ieee80211_sub_if_data *sdata;
996 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1001 mutex_lock(&local->iflist_mtx);
1003 sdata = rcu_dereference_protected(local->monitor_sdata,
1004 lockdep_is_held(&local->iflist_mtx));
1006 mutex_unlock(&local->iflist_mtx);
1010 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1011 mutex_unlock(&local->iflist_mtx);
1015 mutex_lock(&local->mtx);
1016 ieee80211_vif_release_channel(sdata);
1017 mutex_unlock(&local->mtx);
1019 drv_remove_interface(local, sdata);
1025 * NOTE: Be very careful when changing this function, it must NOT return
1026 * an error on interface type changes that have been pre-checked, so most
1027 * checks should be in ieee80211_check_concurrent_iface.
1029 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1031 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1032 struct net_device *dev = wdev->netdev;
1033 struct ieee80211_local *local = sdata->local;
1036 u32 hw_reconf_flags = 0;
1038 switch (sdata->vif.type) {
1039 case NL80211_IFTYPE_AP_VLAN: {
1040 struct ieee80211_sub_if_data *master;
1045 mutex_lock(&local->mtx);
1046 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1047 mutex_unlock(&local->mtx);
1049 master = container_of(sdata->bss,
1050 struct ieee80211_sub_if_data, u.ap);
1051 sdata->control_port_protocol =
1052 master->control_port_protocol;
1053 sdata->control_port_no_encrypt =
1054 master->control_port_no_encrypt;
1055 sdata->control_port_over_nl80211 =
1056 master->control_port_over_nl80211;
1057 sdata->control_port_no_preauth =
1058 master->control_port_no_preauth;
1059 sdata->vif.cab_queue = master->vif.cab_queue;
1060 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1061 sizeof(sdata->vif.hw_queue));
1062 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1064 mutex_lock(&local->key_mtx);
1065 sdata->crypto_tx_tailroom_needed_cnt +=
1066 master->crypto_tx_tailroom_needed_cnt;
1067 mutex_unlock(&local->key_mtx);
1071 case NL80211_IFTYPE_AP:
1072 sdata->bss = &sdata->u.ap;
1074 case NL80211_IFTYPE_MESH_POINT:
1075 case NL80211_IFTYPE_STATION:
1076 case NL80211_IFTYPE_MONITOR:
1077 case NL80211_IFTYPE_ADHOC:
1078 case NL80211_IFTYPE_P2P_DEVICE:
1079 case NL80211_IFTYPE_OCB:
1080 case NL80211_IFTYPE_NAN:
1081 /* no special treatment */
1083 case NL80211_IFTYPE_UNSPECIFIED:
1084 case NUM_NL80211_IFTYPES:
1085 case NL80211_IFTYPE_P2P_CLIENT:
1086 case NL80211_IFTYPE_P2P_GO:
1087 case NL80211_IFTYPE_WDS:
1093 if (local->open_count == 0) {
1094 res = drv_start(local);
1097 /* we're brought up, everything changes */
1098 hw_reconf_flags = ~0;
1099 ieee80211_led_radio(local, true);
1100 ieee80211_mod_tpt_led_trig(local,
1101 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1105 * Copy the hopefully now-present MAC address to
1106 * this interface, if it has the special null one.
1108 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1109 memcpy(dev->dev_addr,
1110 local->hw.wiphy->perm_addr,
1112 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1114 if (!is_valid_ether_addr(dev->dev_addr)) {
1115 res = -EADDRNOTAVAIL;
1120 switch (sdata->vif.type) {
1121 case NL80211_IFTYPE_AP_VLAN:
1122 /* no need to tell driver, but set carrier and chanctx */
1123 if (rtnl_dereference(sdata->bss->beacon)) {
1124 ieee80211_vif_vlan_copy_chanctx(sdata);
1125 netif_carrier_on(dev);
1126 ieee80211_set_vif_encap_ops(sdata);
1128 netif_carrier_off(dev);
1131 case NL80211_IFTYPE_MONITOR:
1132 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1133 local->cooked_mntrs++;
1137 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1138 res = drv_add_interface(local, sdata);
1141 } else if (local->monitors == 0 && local->open_count == 0) {
1142 res = ieee80211_add_virtual_monitor(local);
1147 /* must be before the call to ieee80211_configure_filter */
1149 if (local->monitors == 1) {
1150 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1151 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1154 ieee80211_adjust_monitor_flags(sdata, 1);
1155 ieee80211_configure_filter(local);
1156 ieee80211_recalc_offload(local);
1157 mutex_lock(&local->mtx);
1158 ieee80211_recalc_idle(local);
1159 mutex_unlock(&local->mtx);
1161 netif_carrier_on(dev);
1165 ieee80211_del_virtual_monitor(local);
1166 ieee80211_set_sdata_offload_flags(sdata);
1168 res = drv_add_interface(local, sdata);
1172 ieee80211_set_vif_encap_ops(sdata);
1173 res = ieee80211_check_queues(sdata,
1174 ieee80211_vif_type_p2p(&sdata->vif));
1176 goto err_del_interface;
1179 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1180 local->fif_pspoll++;
1181 local->fif_probe_req++;
1183 ieee80211_configure_filter(local);
1184 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1185 local->fif_probe_req++;
1188 if (sdata->vif.probe_req_reg)
1189 drv_config_iface_filter(local, sdata,
1193 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1194 sdata->vif.type != NL80211_IFTYPE_NAN)
1195 changed |= ieee80211_reset_erp_info(sdata);
1196 ieee80211_bss_info_change_notify(sdata, changed);
1198 switch (sdata->vif.type) {
1199 case NL80211_IFTYPE_STATION:
1200 case NL80211_IFTYPE_ADHOC:
1201 case NL80211_IFTYPE_AP:
1202 case NL80211_IFTYPE_MESH_POINT:
1203 case NL80211_IFTYPE_OCB:
1204 netif_carrier_off(dev);
1206 case NL80211_IFTYPE_P2P_DEVICE:
1207 case NL80211_IFTYPE_NAN:
1215 * Set default queue parameters so drivers don't
1216 * need to initialise the hardware if the hardware
1217 * doesn't start up with sane defaults.
1218 * Enable QoS for anything but station interfaces.
1220 ieee80211_set_wmm_default(sdata, true,
1221 sdata->vif.type != NL80211_IFTYPE_STATION);
1224 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1226 switch (sdata->vif.type) {
1227 case NL80211_IFTYPE_P2P_DEVICE:
1228 rcu_assign_pointer(local->p2p_sdata, sdata);
1230 case NL80211_IFTYPE_MONITOR:
1231 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1233 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1240 * set_multicast_list will be invoked by the networking core
1241 * which will check whether any increments here were done in
1242 * error and sync them down to the hardware as filter flags.
1244 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1245 atomic_inc(&local->iff_allmultis);
1248 local->open_count++;
1250 if (hw_reconf_flags)
1251 ieee80211_hw_config(local, hw_reconf_flags);
1253 ieee80211_recalc_ps(local);
1255 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1256 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1257 local->ops->wake_tx_queue) {
1258 /* XXX: for AP_VLAN, actually track AP queues */
1260 netif_tx_start_all_queues(dev);
1262 unsigned long flags;
1263 int n_acs = IEEE80211_NUM_ACS;
1266 if (local->hw.queues < IEEE80211_NUM_ACS)
1269 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1270 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1271 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1272 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1273 for (ac = 0; ac < n_acs; ac++) {
1274 int ac_queue = sdata->vif.hw_queue[ac];
1276 if (local->queue_stop_reasons[ac_queue] == 0 &&
1277 skb_queue_empty(&local->pending[ac_queue]))
1278 netif_start_subqueue(dev, ac);
1281 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1286 drv_remove_interface(local, sdata);
1288 if (!local->open_count)
1292 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1293 mutex_lock(&local->mtx);
1294 list_del(&sdata->u.vlan.list);
1295 mutex_unlock(&local->mtx);
1297 /* might already be clear but that doesn't matter */
1298 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1302 static void ieee80211_if_free(struct net_device *dev)
1304 free_percpu(dev->tstats);
1307 static void ieee80211_if_setup(struct net_device *dev)
1310 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1311 dev->netdev_ops = &ieee80211_dataif_ops;
1312 dev->needs_free_netdev = true;
1313 dev->priv_destructor = ieee80211_if_free;
1316 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1318 ieee80211_if_setup(dev);
1319 dev->priv_flags |= IFF_NO_QUEUE;
1322 static void ieee80211_iface_work(struct work_struct *work)
1324 struct ieee80211_sub_if_data *sdata =
1325 container_of(work, struct ieee80211_sub_if_data, work);
1326 struct ieee80211_local *local = sdata->local;
1327 struct sk_buff *skb;
1328 struct sta_info *sta;
1330 if (!ieee80211_sdata_running(sdata))
1333 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1336 if (!ieee80211_can_run_worker(local))
1339 /* first process frames */
1340 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1341 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1343 kcov_remote_start_common(skb_get_kcov_handle(skb));
1344 if (ieee80211_is_action(mgmt->frame_control) &&
1345 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1348 mutex_lock(&local->sta_mtx);
1349 sta = sta_info_get_bss(sdata, mgmt->sa);
1351 switch (mgmt->u.action.u.addba_req.action_code) {
1352 case WLAN_ACTION_ADDBA_REQ:
1353 ieee80211_process_addba_request(
1354 local, sta, mgmt, len);
1356 case WLAN_ACTION_ADDBA_RESP:
1357 ieee80211_process_addba_resp(local, sta,
1360 case WLAN_ACTION_DELBA:
1361 ieee80211_process_delba(sdata, sta,
1369 mutex_unlock(&local->sta_mtx);
1370 } else if (ieee80211_is_action(mgmt->frame_control) &&
1371 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1372 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1373 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1374 struct ieee80211_rx_status *status;
1375 enum nl80211_band band;
1378 status = IEEE80211_SKB_RXCB(skb);
1379 band = status->band;
1380 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1382 mutex_lock(&local->sta_mtx);
1383 sta = sta_info_get_bss(sdata, mgmt->sa);
1386 ieee80211_vht_handle_opmode(sdata, sta,
1390 mutex_unlock(&local->sta_mtx);
1393 case WLAN_VHT_ACTION_GROUPID_MGMT:
1394 ieee80211_process_mu_groups(sdata, mgmt);
1400 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1401 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1402 ieee80211_sta_rx_queued_ext(sdata, skb);
1405 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1406 struct ieee80211_hdr *hdr = (void *)mgmt;
1408 * So the frame isn't mgmt, but frame_control
1409 * is at the right place anyway, of course, so
1410 * the if statement is correct.
1412 * Warn if we have other data frame types here,
1413 * they must not get here.
1415 WARN_ON(hdr->frame_control &
1416 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1417 WARN_ON(!(hdr->seq_ctrl &
1418 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1420 * This was a fragment of a frame, received while
1421 * a block-ack session was active. That cannot be
1422 * right, so terminate the session.
1424 mutex_lock(&local->sta_mtx);
1425 sta = sta_info_get_bss(sdata, mgmt->sa);
1427 u16 tid = ieee80211_get_tid(hdr);
1429 __ieee80211_stop_rx_ba_session(
1430 sta, tid, WLAN_BACK_RECIPIENT,
1431 WLAN_REASON_QSTA_REQUIRE_SETUP,
1434 mutex_unlock(&local->sta_mtx);
1435 } else switch (sdata->vif.type) {
1436 case NL80211_IFTYPE_STATION:
1437 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1439 case NL80211_IFTYPE_ADHOC:
1440 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1442 case NL80211_IFTYPE_MESH_POINT:
1443 if (!ieee80211_vif_is_mesh(&sdata->vif))
1445 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1448 WARN(1, "frame for unexpected interface type");
1456 /* then other type-dependent work */
1457 switch (sdata->vif.type) {
1458 case NL80211_IFTYPE_STATION:
1459 ieee80211_sta_work(sdata);
1461 case NL80211_IFTYPE_ADHOC:
1462 ieee80211_ibss_work(sdata);
1464 case NL80211_IFTYPE_MESH_POINT:
1465 if (!ieee80211_vif_is_mesh(&sdata->vif))
1467 ieee80211_mesh_work(sdata);
1469 case NL80211_IFTYPE_OCB:
1470 ieee80211_ocb_work(sdata);
1477 static void ieee80211_recalc_smps_work(struct work_struct *work)
1479 struct ieee80211_sub_if_data *sdata =
1480 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1482 ieee80211_recalc_smps(sdata);
1486 * Helper function to initialise an interface to a specific type.
1488 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1489 enum nl80211_iftype type)
1491 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1494 /* clear type-dependent union */
1495 memset(&sdata->u, 0, sizeof(sdata->u));
1497 /* and set some type-dependent values */
1498 sdata->vif.type = type;
1499 sdata->vif.p2p = false;
1500 sdata->wdev.iftype = type;
1502 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1503 sdata->control_port_no_encrypt = false;
1504 sdata->control_port_over_nl80211 = false;
1505 sdata->control_port_no_preauth = false;
1506 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1507 sdata->vif.bss_conf.idle = true;
1508 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1510 sdata->noack_map = 0;
1512 /* only monitor/p2p-device differ */
1514 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1515 sdata->dev->type = ARPHRD_ETHER;
1518 skb_queue_head_init(&sdata->skb_queue);
1519 INIT_WORK(&sdata->work, ieee80211_iface_work);
1520 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1521 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1522 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1523 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1526 case NL80211_IFTYPE_P2P_GO:
1527 type = NL80211_IFTYPE_AP;
1528 sdata->vif.type = type;
1529 sdata->vif.p2p = true;
1531 case NL80211_IFTYPE_AP:
1532 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1533 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1534 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1536 case NL80211_IFTYPE_P2P_CLIENT:
1537 type = NL80211_IFTYPE_STATION;
1538 sdata->vif.type = type;
1539 sdata->vif.p2p = true;
1541 case NL80211_IFTYPE_STATION:
1542 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1543 ieee80211_sta_setup_sdata(sdata);
1545 case NL80211_IFTYPE_OCB:
1546 sdata->vif.bss_conf.bssid = bssid_wildcard;
1547 ieee80211_ocb_setup_sdata(sdata);
1549 case NL80211_IFTYPE_ADHOC:
1550 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1551 ieee80211_ibss_setup_sdata(sdata);
1553 case NL80211_IFTYPE_MESH_POINT:
1554 if (ieee80211_vif_is_mesh(&sdata->vif))
1555 ieee80211_mesh_init_sdata(sdata);
1557 case NL80211_IFTYPE_MONITOR:
1558 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1559 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1560 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1561 MONITOR_FLAG_OTHER_BSS;
1563 case NL80211_IFTYPE_NAN:
1564 idr_init(&sdata->u.nan.function_inst_ids);
1565 spin_lock_init(&sdata->u.nan.func_lock);
1566 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1568 case NL80211_IFTYPE_AP_VLAN:
1569 case NL80211_IFTYPE_P2P_DEVICE:
1570 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1572 case NL80211_IFTYPE_UNSPECIFIED:
1573 case NL80211_IFTYPE_WDS:
1574 case NUM_NL80211_IFTYPES:
1579 ieee80211_debugfs_add_netdev(sdata);
1582 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1583 enum nl80211_iftype type)
1585 struct ieee80211_local *local = sdata->local;
1587 enum nl80211_iftype internal_type = type;
1592 if (!local->ops->change_interface)
1595 switch (sdata->vif.type) {
1596 case NL80211_IFTYPE_AP:
1597 case NL80211_IFTYPE_STATION:
1598 case NL80211_IFTYPE_ADHOC:
1599 case NL80211_IFTYPE_OCB:
1601 * Could maybe also all others here?
1602 * Just not sure how that interacts
1603 * with the RX/config path e.g. for
1612 case NL80211_IFTYPE_AP:
1613 case NL80211_IFTYPE_STATION:
1614 case NL80211_IFTYPE_ADHOC:
1615 case NL80211_IFTYPE_OCB:
1617 * Could probably support everything
1621 case NL80211_IFTYPE_P2P_CLIENT:
1623 internal_type = NL80211_IFTYPE_STATION;
1625 case NL80211_IFTYPE_P2P_GO:
1627 internal_type = NL80211_IFTYPE_AP;
1633 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1637 ieee80211_stop_vif_queues(local, sdata,
1638 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1641 ieee80211_do_stop(sdata, false);
1643 ieee80211_teardown_sdata(sdata);
1645 ieee80211_set_sdata_offload_flags(sdata);
1646 ret = drv_change_interface(local, sdata, internal_type, p2p);
1648 type = ieee80211_vif_type_p2p(&sdata->vif);
1651 * Ignore return value here, there's not much we can do since
1652 * the driver changed the interface type internally already.
1653 * The warnings will hopefully make driver authors fix it :-)
1655 ieee80211_check_queues(sdata, type);
1657 ieee80211_setup_sdata(sdata, type);
1658 ieee80211_set_vif_encap_ops(sdata);
1660 err = ieee80211_do_open(&sdata->wdev, false);
1661 WARN(err, "type change: do_open returned %d", err);
1663 ieee80211_wake_vif_queues(local, sdata,
1664 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1668 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1669 enum nl80211_iftype type)
1675 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1678 if (ieee80211_sdata_running(sdata)) {
1679 ret = ieee80211_runtime_change_iftype(sdata, type);
1683 /* Purge and reset type-dependent state. */
1684 ieee80211_teardown_sdata(sdata);
1685 ieee80211_setup_sdata(sdata, type);
1688 /* reset some values that shouldn't be kept across type changes */
1689 if (type == NL80211_IFTYPE_STATION)
1690 sdata->u.mgd.use_4addr = false;
1695 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1696 u8 *perm_addr, enum nl80211_iftype type)
1698 struct ieee80211_sub_if_data *sdata;
1699 u64 mask, start, addr, val, inc;
1701 u8 tmp_addr[ETH_ALEN];
1704 /* default ... something at least */
1705 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1707 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1708 local->hw.wiphy->n_addresses <= 1)
1711 mutex_lock(&local->iflist_mtx);
1714 case NL80211_IFTYPE_MONITOR:
1715 /* doesn't matter */
1717 case NL80211_IFTYPE_AP_VLAN:
1718 /* match up with an AP interface */
1719 list_for_each_entry(sdata, &local->interfaces, list) {
1720 if (sdata->vif.type != NL80211_IFTYPE_AP)
1722 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1725 /* keep default if no AP interface present */
1727 case NL80211_IFTYPE_P2P_CLIENT:
1728 case NL80211_IFTYPE_P2P_GO:
1729 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1730 list_for_each_entry(sdata, &local->interfaces, list) {
1731 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1733 if (!ieee80211_sdata_running(sdata))
1735 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1741 /* assign a new address if possible -- try n_addresses first */
1742 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1745 list_for_each_entry(sdata, &local->interfaces, list) {
1746 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1755 local->hw.wiphy->addresses[i].addr,
1761 /* try mask if available */
1762 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1765 m = local->hw.wiphy->addr_mask;
1766 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1767 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1768 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1770 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1771 /* not a contiguous mask ... not handled now! */
1772 pr_info("not contiguous\n");
1777 * Pick address of existing interface in case user changed
1778 * MAC address manually, default to perm_addr.
1780 m = local->hw.wiphy->perm_addr;
1781 list_for_each_entry(sdata, &local->interfaces, list) {
1782 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1784 m = sdata->vif.addr;
1787 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1788 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1789 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1791 inc = 1ULL<<__ffs64(mask);
1792 val = (start & mask);
1793 addr = (start & ~mask) | (val & mask);
1797 tmp_addr[5] = addr >> 0*8;
1798 tmp_addr[4] = addr >> 1*8;
1799 tmp_addr[3] = addr >> 2*8;
1800 tmp_addr[2] = addr >> 3*8;
1801 tmp_addr[1] = addr >> 4*8;
1802 tmp_addr[0] = addr >> 5*8;
1806 list_for_each_entry(sdata, &local->interfaces, list) {
1807 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1814 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1817 addr = (start & ~mask) | (val & mask);
1818 } while (addr != start);
1824 mutex_unlock(&local->iflist_mtx);
1827 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1828 unsigned char name_assign_type,
1829 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1830 struct vif_params *params)
1832 struct net_device *ndev = NULL;
1833 struct ieee80211_sub_if_data *sdata = NULL;
1834 struct txq_info *txqi;
1835 void (*if_setup)(struct net_device *dev);
1841 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1842 struct wireless_dev *wdev;
1844 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1848 wdev = &sdata->wdev;
1851 strlcpy(sdata->name, name, IFNAMSIZ);
1852 ieee80211_assign_perm_addr(local, wdev->address, type);
1853 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1855 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1859 if (local->ops->wake_tx_queue &&
1860 type != NL80211_IFTYPE_AP_VLAN &&
1861 (type != NL80211_IFTYPE_MONITOR ||
1862 (params->flags & MONITOR_FLAG_ACTIVE)))
1863 txq_size += sizeof(struct txq_info) +
1864 local->hw.txq_data_size;
1866 if (local->ops->wake_tx_queue) {
1867 if_setup = ieee80211_if_setup_no_queue;
1869 if_setup = ieee80211_if_setup;
1870 if (local->hw.queues >= IEEE80211_NUM_ACS)
1871 txqs = IEEE80211_NUM_ACS;
1874 ndev = alloc_netdev_mqs(size + txq_size,
1875 name, name_assign_type,
1880 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1881 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1883 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1885 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1886 if (!ndev->tstats) {
1891 ndev->needed_headroom = local->tx_headroom +
1892 4*6 /* four MAC addresses */
1893 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1895 + 8 /* rfc1042/bridge tunnel */
1896 - ETH_HLEN /* ethernet hard_header_len */
1897 + IEEE80211_ENCRYPT_HEADROOM;
1898 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1900 ret = dev_alloc_name(ndev, ndev->name);
1902 ieee80211_if_free(ndev);
1907 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1908 if (is_valid_ether_addr(params->macaddr))
1909 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1911 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1912 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1914 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1915 sdata = netdev_priv(ndev);
1916 ndev->ieee80211_ptr = &sdata->wdev;
1917 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1918 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1921 txqi = netdev_priv(ndev) + size;
1922 ieee80211_txq_init(sdata, NULL, txqi, 0);
1928 /* initialise type-independent data */
1929 sdata->wdev.wiphy = local->hw.wiphy;
1930 sdata->local = local;
1932 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1933 skb_queue_head_init(&sdata->fragments[i].skb_list);
1935 INIT_LIST_HEAD(&sdata->key_list);
1937 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1938 ieee80211_dfs_cac_timer_work);
1939 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1940 ieee80211_delayed_tailroom_dec);
1942 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1943 struct ieee80211_supported_band *sband;
1944 sband = local->hw.wiphy->bands[i];
1945 sdata->rc_rateidx_mask[i] =
1946 sband ? (1 << sband->n_bitrates) - 1 : 0;
1951 memcpy(sdata->rc_rateidx_mcs_mask[i],
1952 sband->ht_cap.mcs.rx_mask,
1953 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1955 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1956 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1957 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1959 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1960 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1961 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1962 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1966 ieee80211_set_default_queues(sdata);
1968 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1969 sdata->user_power_level = local->user_power_level;
1971 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1973 /* setup type-dependent data */
1974 ieee80211_setup_sdata(sdata, type);
1977 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1978 if (type == NL80211_IFTYPE_STATION)
1979 sdata->u.mgd.use_4addr = params->use_4addr;
1981 ndev->features |= local->hw.netdev_features;
1982 ndev->hw_features |= ndev->features &
1983 MAC80211_SUPPORTED_FEATURES_TX;
1985 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1987 /* MTU range: 256 - 2304 */
1988 ndev->min_mtu = 256;
1989 ndev->max_mtu = local->hw.max_mtu;
1991 ret = cfg80211_register_netdevice(ndev);
1998 mutex_lock(&local->iflist_mtx);
1999 list_add_tail_rcu(&sdata->list, &local->interfaces);
2000 mutex_unlock(&local->iflist_mtx);
2003 *new_wdev = &sdata->wdev;
2008 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2012 mutex_lock(&sdata->local->iflist_mtx);
2013 list_del_rcu(&sdata->list);
2014 mutex_unlock(&sdata->local->iflist_mtx);
2017 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2021 cfg80211_unregister_wdev(&sdata->wdev);
2024 ieee80211_teardown_sdata(sdata);
2029 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2031 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2033 ieee80211_do_stop(sdata, true);
2036 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2038 struct ieee80211_sub_if_data *sdata, *tmp;
2039 LIST_HEAD(unreg_list);
2040 LIST_HEAD(wdev_list);
2044 /* Before destroying the interfaces, make sure they're all stopped so
2045 * that the hardware is stopped. Otherwise, the driver might still be
2046 * iterating the interfaces during the shutdown, e.g. from a worker
2047 * or from RX processing or similar, and if it does so (using atomic
2048 * iteration) while we're manipulating the list, the iteration will
2051 * After this, the hardware should be stopped and the driver should
2052 * have stopped all of its activities, so that we can do RCU-unaware
2053 * manipulations of the interface list below.
2055 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2057 WARN(local->open_count, "%s: open count remains %d\n",
2058 wiphy_name(local->hw.wiphy), local->open_count);
2060 ieee80211_txq_teardown_flows(local);
2062 mutex_lock(&local->iflist_mtx);
2063 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2064 list_del(&sdata->list);
2067 unregister_netdevice_queue(sdata->dev, &unreg_list);
2069 list_add(&sdata->list, &wdev_list);
2071 mutex_unlock(&local->iflist_mtx);
2073 unregister_netdevice_many(&unreg_list);
2075 wiphy_lock(local->hw.wiphy);
2076 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2077 list_del(&sdata->list);
2078 cfg80211_unregister_wdev(&sdata->wdev);
2081 wiphy_unlock(local->hw.wiphy);
2084 static int netdev_notify(struct notifier_block *nb,
2085 unsigned long state, void *ptr)
2087 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2088 struct ieee80211_sub_if_data *sdata;
2090 if (state != NETDEV_CHANGENAME)
2093 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2096 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2099 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2100 memcpy(sdata->name, dev->name, IFNAMSIZ);
2101 ieee80211_debugfs_rename_netdev(sdata);
2106 static struct notifier_block mac80211_netdev_notifier = {
2107 .notifier_call = netdev_notify,
2110 int ieee80211_iface_init(void)
2112 return register_netdevice_notifier(&mac80211_netdev_notifier);
2115 void ieee80211_iface_exit(void)
2117 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2120 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2122 if (sdata->vif.type == NL80211_IFTYPE_AP)
2123 atomic_inc(&sdata->u.ap.num_mcast_sta);
2124 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2125 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2128 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2130 if (sdata->vif.type == NL80211_IFTYPE_AP)
2131 atomic_dec(&sdata->u.ap.num_mcast_sta);
2132 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2133 atomic_dec(&sdata->u.vlan.num_mcast_sta);