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_WDS) ||
234 (type1 == NL80211_IFTYPE_WDS &&
235 (type2 == NL80211_IFTYPE_WDS ||
236 type2 == NL80211_IFTYPE_AP)) ||
237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
238 (type1 == NL80211_IFTYPE_AP_VLAN &&
239 (type2 == NL80211_IFTYPE_AP ||
240 type2 == NL80211_IFTYPE_AP_VLAN));
243 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
244 enum nl80211_iftype iftype)
246 struct ieee80211_local *local = sdata->local;
247 struct ieee80211_sub_if_data *nsdata;
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata, &local->interfaces, list) {
254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
256 * Only OCB and monitor mode may coexist
258 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
260 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
261 nsdata->vif.type == NL80211_IFTYPE_OCB))
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
274 if (iftype == NL80211_IFTYPE_ADHOC &&
275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
278 * will not add another interface while any channel
281 if (nsdata->vif.csa_active)
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
288 if (!ether_addr_equal(sdata->vif.addr,
293 * check whether it may have the same address
295 if (!identical_mac_addr_allowed(iftype,
300 * can only add VLANs to enabled APs
302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
308 mutex_lock(&local->chanctx_mtx);
309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
310 mutex_unlock(&local->chanctx_mtx);
314 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
315 enum nl80211_iftype iftype)
317 int n_queues = sdata->local->hw.queues;
320 if (iftype == NL80211_IFTYPE_NAN)
323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
324 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
326 IEEE80211_INVAL_HW_QUEUE))
328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
334 if ((iftype != NL80211_IFTYPE_AP &&
335 iftype != NL80211_IFTYPE_P2P_GO &&
336 iftype != NL80211_IFTYPE_MESH_POINT) ||
337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
351 static int ieee80211_open(struct net_device *dev)
353 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
356 /* fail early if user set an invalid address */
357 if (!is_valid_ether_addr(dev->dev_addr))
358 return -EADDRNOTAVAIL;
360 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
364 return ieee80211_do_open(&sdata->wdev, true);
367 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
370 struct ieee80211_local *local = sdata->local;
372 struct sk_buff *skb, *tmp;
373 u32 hw_reconf_flags = 0;
376 struct cfg80211_chan_def chandef;
378 struct cfg80211_nan_func *func;
380 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
382 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
384 ieee80211_scan_cancel(local);
387 * Stop TX on this interface first.
390 netif_tx_stop_all_queues(sdata->dev);
392 ieee80211_roc_purge(local, sdata);
394 switch (sdata->vif.type) {
395 case NL80211_IFTYPE_STATION:
396 ieee80211_mgd_stop(sdata);
398 case NL80211_IFTYPE_ADHOC:
399 ieee80211_ibss_stop(sdata);
401 case NL80211_IFTYPE_MONITOR:
402 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
404 list_del_rcu(&sdata->u.mntr.list);
411 * Remove all stations associated with this interface.
413 * This must be done before calling ops->remove_interface()
414 * because otherwise we can later invoke ops->sta_notify()
415 * whenever the STAs are removed, and that invalidates driver
416 * assumptions about always getting a vif pointer that is valid
417 * (because if we remove a STA after ops->remove_interface()
418 * the driver will have removed the vif info already!)
420 * In WDS mode a station must exist here and be flushed, for
421 * AP_VLANs stations may exist since there's nothing else that
422 * would have removed them, but in other modes there shouldn't
425 flushed = sta_info_flush(sdata);
426 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
427 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
428 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
430 /* don't count this interface for allmulti while it is down */
431 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
432 atomic_dec(&local->iff_allmultis);
434 if (sdata->vif.type == NL80211_IFTYPE_AP) {
436 local->fif_probe_req--;
437 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
438 local->fif_probe_req--;
442 netif_addr_lock_bh(sdata->dev);
443 spin_lock_bh(&local->filter_lock);
444 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
445 sdata->dev->addr_len);
446 spin_unlock_bh(&local->filter_lock);
447 netif_addr_unlock_bh(sdata->dev);
450 del_timer_sync(&local->dynamic_ps_timer);
451 cancel_work_sync(&local->dynamic_ps_enable_work);
453 cancel_work_sync(&sdata->recalc_smps);
455 mutex_lock(&local->mtx);
456 sdata->vif.csa_active = false;
457 if (sdata->vif.type == NL80211_IFTYPE_STATION)
458 sdata->u.mgd.csa_waiting_bcn = false;
459 if (sdata->csa_block_tx) {
460 ieee80211_wake_vif_queues(local, sdata,
461 IEEE80211_QUEUE_STOP_REASON_CSA);
462 sdata->csa_block_tx = false;
464 mutex_unlock(&local->mtx);
467 cancel_work_sync(&sdata->csa_finalize_work);
469 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
471 if (sdata->wdev.cac_started) {
472 chandef = sdata->vif.bss_conf.chandef;
473 WARN_ON(local->suspended);
474 mutex_lock(&local->mtx);
475 ieee80211_vif_release_channel(sdata);
476 mutex_unlock(&local->mtx);
477 cfg80211_cac_event(sdata->dev, &chandef,
478 NL80211_RADAR_CAC_ABORTED,
482 /* APs need special treatment */
483 if (sdata->vif.type == NL80211_IFTYPE_AP) {
484 struct ieee80211_sub_if_data *vlan, *tmpsdata;
486 /* down all dependent devices, that is VLANs */
487 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
489 dev_close(vlan->dev);
490 WARN_ON(!list_empty(&sdata->u.ap.vlans));
491 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
492 /* remove all packets in parent bc_buf pointing to this dev */
493 ps = &sdata->bss->ps;
495 spin_lock_irqsave(&ps->bc_buf.lock, flags);
496 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
497 if (skb->dev == sdata->dev) {
498 __skb_unlink(skb, &ps->bc_buf);
499 local->total_ps_buffered--;
500 ieee80211_free_txskb(&local->hw, skb);
503 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
509 switch (sdata->vif.type) {
510 case NL80211_IFTYPE_AP_VLAN:
511 mutex_lock(&local->mtx);
512 list_del(&sdata->u.vlan.list);
513 mutex_unlock(&local->mtx);
514 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
515 /* see comment in the default case below */
516 ieee80211_free_keys(sdata, true);
517 /* no need to tell driver */
519 case NL80211_IFTYPE_MONITOR:
520 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
521 local->cooked_mntrs--;
526 if (local->monitors == 0) {
527 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
528 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
531 ieee80211_adjust_monitor_flags(sdata, -1);
533 case NL80211_IFTYPE_NAN:
534 /* clean all the functions */
535 spin_lock_bh(&sdata->u.nan.func_lock);
537 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
538 idr_remove(&sdata->u.nan.function_inst_ids, i);
539 cfg80211_free_nan_func(func);
541 idr_destroy(&sdata->u.nan.function_inst_ids);
543 spin_unlock_bh(&sdata->u.nan.func_lock);
545 case NL80211_IFTYPE_P2P_DEVICE:
546 /* relies on synchronize_rcu() below */
547 RCU_INIT_POINTER(local->p2p_sdata, NULL);
550 cancel_work_sync(&sdata->work);
552 * When we get here, the interface is marked down.
553 * Free the remaining keys, if there are any
554 * (which can happen in AP mode if userspace sets
555 * keys before the interface is operating, and maybe
558 * Force the key freeing to always synchronize_net()
559 * to wait for the RX path in case it is using this
560 * interface enqueuing frames at this very time on
563 ieee80211_free_keys(sdata, true);
564 skb_queue_purge(&sdata->skb_queue);
567 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
568 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
569 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
570 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
571 if (info->control.vif == &sdata->vif) {
572 __skb_unlink(skb, &local->pending[i]);
573 ieee80211_free_txskb(&local->hw, skb);
577 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
579 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
580 ieee80211_txq_remove_vlan(local, sdata);
584 if (local->open_count == 0)
585 ieee80211_clear_tx_pending(local);
587 sdata->vif.bss_conf.beacon_int = 0;
590 * If the interface goes down while suspended, presumably because
591 * the device was unplugged and that happens before our resume,
592 * then the driver is already unconfigured and the remainder of
593 * this function isn't needed.
594 * XXX: what about WoWLAN? If the device has software state, e.g.
595 * memory allocated, it might expect teardown commands from
598 if (local->suspended) {
599 WARN_ON(local->wowlan);
600 WARN_ON(rtnl_dereference(local->monitor_sdata));
604 switch (sdata->vif.type) {
605 case NL80211_IFTYPE_AP_VLAN:
607 case NL80211_IFTYPE_MONITOR:
608 if (local->monitors == 0)
609 ieee80211_del_virtual_monitor(local);
611 mutex_lock(&local->mtx);
612 ieee80211_recalc_idle(local);
613 mutex_unlock(&local->mtx);
615 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
621 drv_remove_interface(local, sdata);
624 ieee80211_recalc_ps(local);
627 flush_delayed_work(&local->scan_work);
629 if (local->open_count == 0) {
630 ieee80211_stop_device(local);
632 /* no reconfiguring after stop! */
636 /* do after stop to avoid reconfiguring when we stop anyway */
637 ieee80211_configure_filter(local);
638 ieee80211_hw_config(local, hw_reconf_flags);
640 if (local->monitors == local->open_count)
641 ieee80211_add_virtual_monitor(local);
644 static int ieee80211_stop(struct net_device *dev)
646 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
648 ieee80211_do_stop(sdata, true);
653 static void ieee80211_set_multicast_list(struct net_device *dev)
655 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
656 struct ieee80211_local *local = sdata->local;
657 int allmulti, sdata_allmulti;
659 allmulti = !!(dev->flags & IFF_ALLMULTI);
660 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
662 if (allmulti != sdata_allmulti) {
663 if (dev->flags & IFF_ALLMULTI)
664 atomic_inc(&local->iff_allmultis);
666 atomic_dec(&local->iff_allmultis);
667 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
670 spin_lock_bh(&local->filter_lock);
671 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
672 spin_unlock_bh(&local->filter_lock);
673 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
677 * Called when the netdev is removed or, by the code below, before
678 * the interface type changes.
680 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
684 /* free extra data */
685 ieee80211_free_keys(sdata, false);
687 ieee80211_debugfs_remove_netdev(sdata);
689 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
690 __skb_queue_purge(&sdata->fragments[i].skb_list);
691 sdata->fragment_next = 0;
693 if (ieee80211_vif_is_mesh(&sdata->vif))
694 ieee80211_mesh_teardown_sdata(sdata);
697 static void ieee80211_uninit(struct net_device *dev)
699 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
702 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
704 struct net_device *sb_dev)
706 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
710 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
712 dev_fetch_sw_netstats(stats, dev->tstats);
715 static const struct net_device_ops ieee80211_dataif_ops = {
716 .ndo_open = ieee80211_open,
717 .ndo_stop = ieee80211_stop,
718 .ndo_uninit = ieee80211_uninit,
719 .ndo_start_xmit = ieee80211_subif_start_xmit,
720 .ndo_set_rx_mode = ieee80211_set_multicast_list,
721 .ndo_set_mac_address = ieee80211_change_mac,
722 .ndo_select_queue = ieee80211_netdev_select_queue,
723 .ndo_get_stats64 = ieee80211_get_stats64,
726 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
728 struct net_device *sb_dev)
730 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
731 struct ieee80211_local *local = sdata->local;
732 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
733 struct ieee80211_hdr *hdr;
736 if (local->hw.queues < IEEE80211_NUM_ACS)
739 /* reset flags and info before parsing radiotap header */
740 memset(info, 0, sizeof(*info));
742 if (!ieee80211_parse_tx_radiotap(skb, dev))
743 return 0; /* doesn't matter, frame will be dropped */
745 len_rthdr = ieee80211_get_radiotap_len(skb->data);
746 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
747 if (skb->len < len_rthdr + 2 ||
748 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
749 return 0; /* doesn't matter, frame will be dropped */
751 return ieee80211_select_queue_80211(sdata, skb, hdr);
754 static const struct net_device_ops ieee80211_monitorif_ops = {
755 .ndo_open = ieee80211_open,
756 .ndo_stop = ieee80211_stop,
757 .ndo_uninit = ieee80211_uninit,
758 .ndo_start_xmit = ieee80211_monitor_start_xmit,
759 .ndo_set_rx_mode = ieee80211_set_multicast_list,
760 .ndo_set_mac_address = ieee80211_change_mac,
761 .ndo_select_queue = ieee80211_monitor_select_queue,
762 .ndo_get_stats64 = ieee80211_get_stats64,
765 static const struct net_device_ops ieee80211_dataif_8023_ops = {
766 .ndo_open = ieee80211_open,
767 .ndo_stop = ieee80211_stop,
768 .ndo_uninit = ieee80211_uninit,
769 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
770 .ndo_set_rx_mode = ieee80211_set_multicast_list,
771 .ndo_set_mac_address = ieee80211_change_mac,
772 .ndo_select_queue = ieee80211_netdev_select_queue,
773 .ndo_get_stats64 = ieee80211_get_stats64,
776 static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
779 /* P2P GO and client are mapped to AP/STATION types */
780 case NL80211_IFTYPE_AP:
781 case NL80211_IFTYPE_STATION:
788 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
790 struct ieee80211_local *local = sdata->local;
793 flags = sdata->vif.offload_flags;
795 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
796 ieee80211_iftype_supports_encap_offload(sdata->vif.type)) {
797 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
799 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
800 local->hw.wiphy->frag_threshold != (u32)-1)
801 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
804 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
806 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
809 if (sdata->vif.offload_flags == flags)
812 sdata->vif.offload_flags = flags;
816 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
818 struct ieee80211_local *local = sdata->local;
819 struct ieee80211_sub_if_data *bss = sdata;
822 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
826 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
829 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
830 !ieee80211_iftype_supports_encap_offload(bss->vif.type))
833 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
834 if (sdata->wdev.use_4addr &&
835 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
838 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
839 &ieee80211_dataif_ops;
842 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
844 struct ieee80211_local *local = sdata->local;
845 struct ieee80211_sub_if_data *vsdata;
847 if (ieee80211_set_sdata_offload_flags(sdata)) {
848 drv_update_vif_offload(local, sdata);
849 ieee80211_set_vif_encap_ops(sdata);
852 list_for_each_entry(vsdata, &local->interfaces, list) {
853 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
854 vsdata->bss != &sdata->u.ap)
857 ieee80211_set_vif_encap_ops(vsdata);
861 void ieee80211_recalc_offload(struct ieee80211_local *local)
863 struct ieee80211_sub_if_data *sdata;
865 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
868 mutex_lock(&local->iflist_mtx);
870 list_for_each_entry(sdata, &local->interfaces, list) {
871 if (!ieee80211_sdata_running(sdata))
874 ieee80211_recalc_sdata_offload(sdata);
877 mutex_unlock(&local->iflist_mtx);
880 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
883 struct ieee80211_local *local = sdata->local;
884 u32 flags = sdata->u.mntr.flags;
886 #define ADJUST(_f, _s) do { \
887 if (flags & MONITOR_FLAG_##_f) \
888 local->fif_##_s += offset; \
891 ADJUST(FCSFAIL, fcsfail);
892 ADJUST(PLCPFAIL, plcpfail);
893 ADJUST(CONTROL, control);
894 ADJUST(CONTROL, pspoll);
895 ADJUST(OTHER_BSS, other_bss);
900 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
902 struct ieee80211_local *local = sdata->local;
905 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
906 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
907 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
908 else if (local->hw.queues >= IEEE80211_NUM_ACS)
909 sdata->vif.hw_queue[i] = i;
911 sdata->vif.hw_queue[i] = 0;
913 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
916 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
918 struct ieee80211_sub_if_data *sdata;
921 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
926 if (local->monitor_sdata)
929 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
934 sdata->local = local;
935 sdata->vif.type = NL80211_IFTYPE_MONITOR;
936 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
937 wiphy_name(local->hw.wiphy));
938 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
940 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
942 ieee80211_set_default_queues(sdata);
944 ret = drv_add_interface(local, sdata);
946 /* ok .. stupid driver, it asked for this! */
951 set_bit(SDATA_STATE_RUNNING, &sdata->state);
953 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
959 mutex_lock(&local->iflist_mtx);
960 rcu_assign_pointer(local->monitor_sdata, sdata);
961 mutex_unlock(&local->iflist_mtx);
963 mutex_lock(&local->mtx);
964 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
965 IEEE80211_CHANCTX_EXCLUSIVE);
966 mutex_unlock(&local->mtx);
968 mutex_lock(&local->iflist_mtx);
969 RCU_INIT_POINTER(local->monitor_sdata, NULL);
970 mutex_unlock(&local->iflist_mtx);
972 drv_remove_interface(local, sdata);
977 skb_queue_head_init(&sdata->skb_queue);
978 INIT_WORK(&sdata->work, ieee80211_iface_work);
983 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
985 struct ieee80211_sub_if_data *sdata;
987 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
992 mutex_lock(&local->iflist_mtx);
994 sdata = rcu_dereference_protected(local->monitor_sdata,
995 lockdep_is_held(&local->iflist_mtx));
997 mutex_unlock(&local->iflist_mtx);
1001 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1002 mutex_unlock(&local->iflist_mtx);
1006 mutex_lock(&local->mtx);
1007 ieee80211_vif_release_channel(sdata);
1008 mutex_unlock(&local->mtx);
1010 drv_remove_interface(local, sdata);
1016 * NOTE: Be very careful when changing this function, it must NOT return
1017 * an error on interface type changes that have been pre-checked, so most
1018 * checks should be in ieee80211_check_concurrent_iface.
1020 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1022 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1023 struct net_device *dev = wdev->netdev;
1024 struct ieee80211_local *local = sdata->local;
1025 struct sta_info *sta;
1028 u32 hw_reconf_flags = 0;
1030 switch (sdata->vif.type) {
1031 case NL80211_IFTYPE_WDS:
1032 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
1035 case NL80211_IFTYPE_AP_VLAN: {
1036 struct ieee80211_sub_if_data *master;
1041 mutex_lock(&local->mtx);
1042 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1043 mutex_unlock(&local->mtx);
1045 master = container_of(sdata->bss,
1046 struct ieee80211_sub_if_data, u.ap);
1047 sdata->control_port_protocol =
1048 master->control_port_protocol;
1049 sdata->control_port_no_encrypt =
1050 master->control_port_no_encrypt;
1051 sdata->control_port_over_nl80211 =
1052 master->control_port_over_nl80211;
1053 sdata->control_port_no_preauth =
1054 master->control_port_no_preauth;
1055 sdata->vif.cab_queue = master->vif.cab_queue;
1056 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1057 sizeof(sdata->vif.hw_queue));
1058 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1060 mutex_lock(&local->key_mtx);
1061 sdata->crypto_tx_tailroom_needed_cnt +=
1062 master->crypto_tx_tailroom_needed_cnt;
1063 mutex_unlock(&local->key_mtx);
1067 case NL80211_IFTYPE_AP:
1068 sdata->bss = &sdata->u.ap;
1070 case NL80211_IFTYPE_MESH_POINT:
1071 case NL80211_IFTYPE_STATION:
1072 case NL80211_IFTYPE_MONITOR:
1073 case NL80211_IFTYPE_ADHOC:
1074 case NL80211_IFTYPE_P2P_DEVICE:
1075 case NL80211_IFTYPE_OCB:
1076 case NL80211_IFTYPE_NAN:
1077 /* no special treatment */
1079 case NL80211_IFTYPE_UNSPECIFIED:
1080 case NUM_NL80211_IFTYPES:
1081 case NL80211_IFTYPE_P2P_CLIENT:
1082 case NL80211_IFTYPE_P2P_GO:
1088 if (local->open_count == 0) {
1089 res = drv_start(local);
1092 /* we're brought up, everything changes */
1093 hw_reconf_flags = ~0;
1094 ieee80211_led_radio(local, true);
1095 ieee80211_mod_tpt_led_trig(local,
1096 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1100 * Copy the hopefully now-present MAC address to
1101 * this interface, if it has the special null one.
1103 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1104 memcpy(dev->dev_addr,
1105 local->hw.wiphy->perm_addr,
1107 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1109 if (!is_valid_ether_addr(dev->dev_addr)) {
1110 res = -EADDRNOTAVAIL;
1115 switch (sdata->vif.type) {
1116 case NL80211_IFTYPE_AP_VLAN:
1117 /* no need to tell driver, but set carrier and chanctx */
1118 if (rtnl_dereference(sdata->bss->beacon)) {
1119 ieee80211_vif_vlan_copy_chanctx(sdata);
1120 netif_carrier_on(dev);
1121 ieee80211_set_vif_encap_ops(sdata);
1123 netif_carrier_off(dev);
1126 case NL80211_IFTYPE_MONITOR:
1127 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1128 local->cooked_mntrs++;
1132 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1133 res = drv_add_interface(local, sdata);
1136 } else if (local->monitors == 0 && local->open_count == 0) {
1137 res = ieee80211_add_virtual_monitor(local);
1142 /* must be before the call to ieee80211_configure_filter */
1144 if (local->monitors == 1) {
1145 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1146 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1149 ieee80211_adjust_monitor_flags(sdata, 1);
1150 ieee80211_configure_filter(local);
1151 ieee80211_recalc_offload(local);
1152 mutex_lock(&local->mtx);
1153 ieee80211_recalc_idle(local);
1154 mutex_unlock(&local->mtx);
1156 netif_carrier_on(dev);
1160 ieee80211_del_virtual_monitor(local);
1161 ieee80211_set_sdata_offload_flags(sdata);
1163 res = drv_add_interface(local, sdata);
1167 ieee80211_set_vif_encap_ops(sdata);
1168 res = ieee80211_check_queues(sdata,
1169 ieee80211_vif_type_p2p(&sdata->vif));
1171 goto err_del_interface;
1174 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1175 local->fif_pspoll++;
1176 local->fif_probe_req++;
1178 ieee80211_configure_filter(local);
1179 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1180 local->fif_probe_req++;
1183 if (sdata->vif.probe_req_reg)
1184 drv_config_iface_filter(local, sdata,
1188 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1189 sdata->vif.type != NL80211_IFTYPE_NAN)
1190 changed |= ieee80211_reset_erp_info(sdata);
1191 ieee80211_bss_info_change_notify(sdata, changed);
1193 switch (sdata->vif.type) {
1194 case NL80211_IFTYPE_STATION:
1195 case NL80211_IFTYPE_ADHOC:
1196 case NL80211_IFTYPE_AP:
1197 case NL80211_IFTYPE_MESH_POINT:
1198 case NL80211_IFTYPE_OCB:
1199 netif_carrier_off(dev);
1201 case NL80211_IFTYPE_WDS:
1202 case NL80211_IFTYPE_P2P_DEVICE:
1203 case NL80211_IFTYPE_NAN:
1211 * Set default queue parameters so drivers don't
1212 * need to initialise the hardware if the hardware
1213 * doesn't start up with sane defaults.
1214 * Enable QoS for anything but station interfaces.
1216 ieee80211_set_wmm_default(sdata, true,
1217 sdata->vif.type != NL80211_IFTYPE_STATION);
1220 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1222 switch (sdata->vif.type) {
1223 case NL80211_IFTYPE_WDS:
1224 /* Create STA entry for the WDS peer */
1225 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
1229 goto err_del_interface;
1232 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1233 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1234 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
1236 res = sta_info_insert(sta);
1238 /* STA has been freed */
1239 goto err_del_interface;
1242 rate_control_rate_init(sta);
1243 netif_carrier_on(dev);
1245 case NL80211_IFTYPE_P2P_DEVICE:
1246 rcu_assign_pointer(local->p2p_sdata, sdata);
1248 case NL80211_IFTYPE_MONITOR:
1249 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1251 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1258 * set_multicast_list will be invoked by the networking core
1259 * which will check whether any increments here were done in
1260 * error and sync them down to the hardware as filter flags.
1262 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1263 atomic_inc(&local->iff_allmultis);
1266 local->open_count++;
1268 if (hw_reconf_flags)
1269 ieee80211_hw_config(local, hw_reconf_flags);
1271 ieee80211_recalc_ps(local);
1273 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1274 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1275 local->ops->wake_tx_queue) {
1276 /* XXX: for AP_VLAN, actually track AP queues */
1278 netif_tx_start_all_queues(dev);
1280 unsigned long flags;
1281 int n_acs = IEEE80211_NUM_ACS;
1284 if (local->hw.queues < IEEE80211_NUM_ACS)
1287 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1288 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1289 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1290 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1291 for (ac = 0; ac < n_acs; ac++) {
1292 int ac_queue = sdata->vif.hw_queue[ac];
1294 if (local->queue_stop_reasons[ac_queue] == 0 &&
1295 skb_queue_empty(&local->pending[ac_queue]))
1296 netif_start_subqueue(dev, ac);
1299 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1304 drv_remove_interface(local, sdata);
1306 if (!local->open_count)
1310 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1311 mutex_lock(&local->mtx);
1312 list_del(&sdata->u.vlan.list);
1313 mutex_unlock(&local->mtx);
1315 /* might already be clear but that doesn't matter */
1316 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1320 static void ieee80211_if_free(struct net_device *dev)
1322 free_percpu(dev->tstats);
1325 static void ieee80211_if_setup(struct net_device *dev)
1328 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1329 dev->netdev_ops = &ieee80211_dataif_ops;
1330 dev->needs_free_netdev = true;
1331 dev->priv_destructor = ieee80211_if_free;
1334 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1336 ieee80211_if_setup(dev);
1337 dev->priv_flags |= IFF_NO_QUEUE;
1340 static void ieee80211_iface_work(struct work_struct *work)
1342 struct ieee80211_sub_if_data *sdata =
1343 container_of(work, struct ieee80211_sub_if_data, work);
1344 struct ieee80211_local *local = sdata->local;
1345 struct sk_buff *skb;
1346 struct sta_info *sta;
1348 if (!ieee80211_sdata_running(sdata))
1351 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1354 if (!ieee80211_can_run_worker(local))
1357 /* first process frames */
1358 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1359 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1361 if (ieee80211_is_action(mgmt->frame_control) &&
1362 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1365 mutex_lock(&local->sta_mtx);
1366 sta = sta_info_get_bss(sdata, mgmt->sa);
1368 switch (mgmt->u.action.u.addba_req.action_code) {
1369 case WLAN_ACTION_ADDBA_REQ:
1370 ieee80211_process_addba_request(
1371 local, sta, mgmt, len);
1373 case WLAN_ACTION_ADDBA_RESP:
1374 ieee80211_process_addba_resp(local, sta,
1377 case WLAN_ACTION_DELBA:
1378 ieee80211_process_delba(sdata, sta,
1386 mutex_unlock(&local->sta_mtx);
1387 } else if (ieee80211_is_action(mgmt->frame_control) &&
1388 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1389 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1390 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1391 struct ieee80211_rx_status *status;
1392 enum nl80211_band band;
1395 status = IEEE80211_SKB_RXCB(skb);
1396 band = status->band;
1397 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1399 mutex_lock(&local->sta_mtx);
1400 sta = sta_info_get_bss(sdata, mgmt->sa);
1403 ieee80211_vht_handle_opmode(sdata, sta,
1407 mutex_unlock(&local->sta_mtx);
1410 case WLAN_VHT_ACTION_GROUPID_MGMT:
1411 ieee80211_process_mu_groups(sdata, mgmt);
1417 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1418 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1419 ieee80211_sta_rx_queued_ext(sdata, skb);
1422 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1423 struct ieee80211_hdr *hdr = (void *)mgmt;
1425 * So the frame isn't mgmt, but frame_control
1426 * is at the right place anyway, of course, so
1427 * the if statement is correct.
1429 * Warn if we have other data frame types here,
1430 * they must not get here.
1432 WARN_ON(hdr->frame_control &
1433 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1434 WARN_ON(!(hdr->seq_ctrl &
1435 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1437 * This was a fragment of a frame, received while
1438 * a block-ack session was active. That cannot be
1439 * right, so terminate the session.
1441 mutex_lock(&local->sta_mtx);
1442 sta = sta_info_get_bss(sdata, mgmt->sa);
1444 u16 tid = ieee80211_get_tid(hdr);
1446 __ieee80211_stop_rx_ba_session(
1447 sta, tid, WLAN_BACK_RECIPIENT,
1448 WLAN_REASON_QSTA_REQUIRE_SETUP,
1451 mutex_unlock(&local->sta_mtx);
1452 } else switch (sdata->vif.type) {
1453 case NL80211_IFTYPE_STATION:
1454 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1456 case NL80211_IFTYPE_ADHOC:
1457 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1459 case NL80211_IFTYPE_MESH_POINT:
1460 if (!ieee80211_vif_is_mesh(&sdata->vif))
1462 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1465 WARN(1, "frame for unexpected interface type");
1472 /* then other type-dependent work */
1473 switch (sdata->vif.type) {
1474 case NL80211_IFTYPE_STATION:
1475 ieee80211_sta_work(sdata);
1477 case NL80211_IFTYPE_ADHOC:
1478 ieee80211_ibss_work(sdata);
1480 case NL80211_IFTYPE_MESH_POINT:
1481 if (!ieee80211_vif_is_mesh(&sdata->vif))
1483 ieee80211_mesh_work(sdata);
1485 case NL80211_IFTYPE_OCB:
1486 ieee80211_ocb_work(sdata);
1493 static void ieee80211_recalc_smps_work(struct work_struct *work)
1495 struct ieee80211_sub_if_data *sdata =
1496 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1498 ieee80211_recalc_smps(sdata);
1502 * Helper function to initialise an interface to a specific type.
1504 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1505 enum nl80211_iftype type)
1507 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1510 /* clear type-dependent union */
1511 memset(&sdata->u, 0, sizeof(sdata->u));
1513 /* and set some type-dependent values */
1514 sdata->vif.type = type;
1515 sdata->vif.p2p = false;
1516 sdata->wdev.iftype = type;
1518 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1519 sdata->control_port_no_encrypt = false;
1520 sdata->control_port_over_nl80211 = false;
1521 sdata->control_port_no_preauth = false;
1522 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1523 sdata->vif.bss_conf.idle = true;
1524 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1526 sdata->noack_map = 0;
1528 /* only monitor/p2p-device differ */
1530 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1531 sdata->dev->type = ARPHRD_ETHER;
1534 skb_queue_head_init(&sdata->skb_queue);
1535 INIT_WORK(&sdata->work, ieee80211_iface_work);
1536 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1537 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1538 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1539 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1542 case NL80211_IFTYPE_P2P_GO:
1543 type = NL80211_IFTYPE_AP;
1544 sdata->vif.type = type;
1545 sdata->vif.p2p = true;
1547 case NL80211_IFTYPE_AP:
1548 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1549 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1550 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1552 case NL80211_IFTYPE_P2P_CLIENT:
1553 type = NL80211_IFTYPE_STATION;
1554 sdata->vif.type = type;
1555 sdata->vif.p2p = true;
1557 case NL80211_IFTYPE_STATION:
1558 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1559 ieee80211_sta_setup_sdata(sdata);
1561 case NL80211_IFTYPE_OCB:
1562 sdata->vif.bss_conf.bssid = bssid_wildcard;
1563 ieee80211_ocb_setup_sdata(sdata);
1565 case NL80211_IFTYPE_ADHOC:
1566 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1567 ieee80211_ibss_setup_sdata(sdata);
1569 case NL80211_IFTYPE_MESH_POINT:
1570 if (ieee80211_vif_is_mesh(&sdata->vif))
1571 ieee80211_mesh_init_sdata(sdata);
1573 case NL80211_IFTYPE_MONITOR:
1574 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1575 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1576 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1577 MONITOR_FLAG_OTHER_BSS;
1579 case NL80211_IFTYPE_WDS:
1580 sdata->vif.bss_conf.bssid = NULL;
1582 case NL80211_IFTYPE_NAN:
1583 idr_init(&sdata->u.nan.function_inst_ids);
1584 spin_lock_init(&sdata->u.nan.func_lock);
1585 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1587 case NL80211_IFTYPE_AP_VLAN:
1588 case NL80211_IFTYPE_P2P_DEVICE:
1589 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1591 case NL80211_IFTYPE_UNSPECIFIED:
1592 case NUM_NL80211_IFTYPES:
1597 ieee80211_debugfs_add_netdev(sdata);
1600 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1601 enum nl80211_iftype type)
1603 struct ieee80211_local *local = sdata->local;
1605 enum nl80211_iftype internal_type = type;
1610 if (!local->ops->change_interface)
1613 switch (sdata->vif.type) {
1614 case NL80211_IFTYPE_AP:
1615 case NL80211_IFTYPE_STATION:
1616 case NL80211_IFTYPE_ADHOC:
1617 case NL80211_IFTYPE_OCB:
1619 * Could maybe also all others here?
1620 * Just not sure how that interacts
1621 * with the RX/config path e.g. for
1630 case NL80211_IFTYPE_AP:
1631 case NL80211_IFTYPE_STATION:
1632 case NL80211_IFTYPE_ADHOC:
1633 case NL80211_IFTYPE_OCB:
1635 * Could probably support everything
1636 * but WDS here (WDS do_open can fail
1637 * under memory pressure, which this
1638 * code isn't prepared to handle).
1641 case NL80211_IFTYPE_P2P_CLIENT:
1643 internal_type = NL80211_IFTYPE_STATION;
1645 case NL80211_IFTYPE_P2P_GO:
1647 internal_type = NL80211_IFTYPE_AP;
1653 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1657 ieee80211_do_stop(sdata, false);
1659 ieee80211_teardown_sdata(sdata);
1661 ieee80211_set_sdata_offload_flags(sdata);
1662 ret = drv_change_interface(local, sdata, internal_type, p2p);
1664 type = ieee80211_vif_type_p2p(&sdata->vif);
1667 * Ignore return value here, there's not much we can do since
1668 * the driver changed the interface type internally already.
1669 * The warnings will hopefully make driver authors fix it :-)
1671 ieee80211_check_queues(sdata, type);
1673 ieee80211_setup_sdata(sdata, type);
1674 ieee80211_set_vif_encap_ops(sdata);
1676 err = ieee80211_do_open(&sdata->wdev, false);
1677 WARN(err, "type change: do_open returned %d", err);
1682 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1683 enum nl80211_iftype type)
1689 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1692 if (ieee80211_sdata_running(sdata)) {
1693 ret = ieee80211_runtime_change_iftype(sdata, type);
1697 /* Purge and reset type-dependent state. */
1698 ieee80211_teardown_sdata(sdata);
1699 ieee80211_setup_sdata(sdata, type);
1702 /* reset some values that shouldn't be kept across type changes */
1703 if (type == NL80211_IFTYPE_STATION)
1704 sdata->u.mgd.use_4addr = false;
1709 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1710 u8 *perm_addr, enum nl80211_iftype type)
1712 struct ieee80211_sub_if_data *sdata;
1713 u64 mask, start, addr, val, inc;
1715 u8 tmp_addr[ETH_ALEN];
1718 /* default ... something at least */
1719 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1721 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1722 local->hw.wiphy->n_addresses <= 1)
1725 mutex_lock(&local->iflist_mtx);
1728 case NL80211_IFTYPE_MONITOR:
1729 /* doesn't matter */
1731 case NL80211_IFTYPE_WDS:
1732 case NL80211_IFTYPE_AP_VLAN:
1733 /* match up with an AP interface */
1734 list_for_each_entry(sdata, &local->interfaces, list) {
1735 if (sdata->vif.type != NL80211_IFTYPE_AP)
1737 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1740 /* keep default if no AP interface present */
1742 case NL80211_IFTYPE_P2P_CLIENT:
1743 case NL80211_IFTYPE_P2P_GO:
1744 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1745 list_for_each_entry(sdata, &local->interfaces, list) {
1746 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1748 if (!ieee80211_sdata_running(sdata))
1750 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1756 /* assign a new address if possible -- try n_addresses first */
1757 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1760 list_for_each_entry(sdata, &local->interfaces, list) {
1761 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1770 local->hw.wiphy->addresses[i].addr,
1776 /* try mask if available */
1777 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1780 m = local->hw.wiphy->addr_mask;
1781 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1782 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1783 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1785 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1786 /* not a contiguous mask ... not handled now! */
1787 pr_info("not contiguous\n");
1792 * Pick address of existing interface in case user changed
1793 * MAC address manually, default to perm_addr.
1795 m = local->hw.wiphy->perm_addr;
1796 list_for_each_entry(sdata, &local->interfaces, list) {
1797 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1799 m = sdata->vif.addr;
1802 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1803 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1804 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1806 inc = 1ULL<<__ffs64(mask);
1807 val = (start & mask);
1808 addr = (start & ~mask) | (val & mask);
1812 tmp_addr[5] = addr >> 0*8;
1813 tmp_addr[4] = addr >> 1*8;
1814 tmp_addr[3] = addr >> 2*8;
1815 tmp_addr[2] = addr >> 3*8;
1816 tmp_addr[1] = addr >> 4*8;
1817 tmp_addr[0] = addr >> 5*8;
1821 list_for_each_entry(sdata, &local->interfaces, list) {
1822 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1829 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1832 addr = (start & ~mask) | (val & mask);
1833 } while (addr != start);
1839 mutex_unlock(&local->iflist_mtx);
1842 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1843 unsigned char name_assign_type,
1844 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1845 struct vif_params *params)
1847 struct net_device *ndev = NULL;
1848 struct ieee80211_sub_if_data *sdata = NULL;
1849 struct txq_info *txqi;
1850 void (*if_setup)(struct net_device *dev);
1856 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1857 struct wireless_dev *wdev;
1859 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1863 wdev = &sdata->wdev;
1866 strlcpy(sdata->name, name, IFNAMSIZ);
1867 ieee80211_assign_perm_addr(local, wdev->address, type);
1868 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1870 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1874 if (local->ops->wake_tx_queue &&
1875 type != NL80211_IFTYPE_AP_VLAN &&
1876 (type != NL80211_IFTYPE_MONITOR ||
1877 (params->flags & MONITOR_FLAG_ACTIVE)))
1878 txq_size += sizeof(struct txq_info) +
1879 local->hw.txq_data_size;
1881 if (local->ops->wake_tx_queue) {
1882 if_setup = ieee80211_if_setup_no_queue;
1884 if_setup = ieee80211_if_setup;
1885 if (local->hw.queues >= IEEE80211_NUM_ACS)
1886 txqs = IEEE80211_NUM_ACS;
1889 ndev = alloc_netdev_mqs(size + txq_size,
1890 name, name_assign_type,
1895 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1896 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1898 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1900 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1901 if (!ndev->tstats) {
1906 ndev->needed_headroom = local->tx_headroom +
1907 4*6 /* four MAC addresses */
1908 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1910 + 8 /* rfc1042/bridge tunnel */
1911 - ETH_HLEN /* ethernet hard_header_len */
1912 + IEEE80211_ENCRYPT_HEADROOM;
1913 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1915 ret = dev_alloc_name(ndev, ndev->name);
1917 ieee80211_if_free(ndev);
1922 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1923 if (is_valid_ether_addr(params->macaddr))
1924 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1926 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1927 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1929 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1930 sdata = netdev_priv(ndev);
1931 ndev->ieee80211_ptr = &sdata->wdev;
1932 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1933 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1936 txqi = netdev_priv(ndev) + size;
1937 ieee80211_txq_init(sdata, NULL, txqi, 0);
1943 /* initialise type-independent data */
1944 sdata->wdev.wiphy = local->hw.wiphy;
1945 sdata->local = local;
1947 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1948 skb_queue_head_init(&sdata->fragments[i].skb_list);
1950 INIT_LIST_HEAD(&sdata->key_list);
1952 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1953 ieee80211_dfs_cac_timer_work);
1954 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1955 ieee80211_delayed_tailroom_dec);
1957 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1958 struct ieee80211_supported_band *sband;
1959 sband = local->hw.wiphy->bands[i];
1960 sdata->rc_rateidx_mask[i] =
1961 sband ? (1 << sband->n_bitrates) - 1 : 0;
1966 memcpy(sdata->rc_rateidx_mcs_mask[i],
1967 sband->ht_cap.mcs.rx_mask,
1968 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1970 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1971 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1972 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1974 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1975 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1976 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1977 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1981 ieee80211_set_default_queues(sdata);
1983 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1984 sdata->user_power_level = local->user_power_level;
1986 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1988 /* setup type-dependent data */
1989 ieee80211_setup_sdata(sdata, type);
1992 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1993 if (type == NL80211_IFTYPE_STATION)
1994 sdata->u.mgd.use_4addr = params->use_4addr;
1996 ndev->features |= local->hw.netdev_features;
1997 ndev->hw_features |= ndev->features &
1998 MAC80211_SUPPORTED_FEATURES_TX;
2000 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2002 /* MTU range: 256 - 2304 */
2003 ndev->min_mtu = 256;
2004 ndev->max_mtu = local->hw.max_mtu;
2006 ret = register_netdevice(ndev);
2013 mutex_lock(&local->iflist_mtx);
2014 list_add_tail_rcu(&sdata->list, &local->interfaces);
2015 mutex_unlock(&local->iflist_mtx);
2018 *new_wdev = &sdata->wdev;
2023 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2027 mutex_lock(&sdata->local->iflist_mtx);
2028 list_del_rcu(&sdata->list);
2029 mutex_unlock(&sdata->local->iflist_mtx);
2032 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2037 unregister_netdevice(sdata->dev);
2039 cfg80211_unregister_wdev(&sdata->wdev);
2040 ieee80211_teardown_sdata(sdata);
2045 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2047 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2049 ieee80211_do_stop(sdata, true);
2052 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2054 struct ieee80211_sub_if_data *sdata, *tmp;
2055 LIST_HEAD(unreg_list);
2056 LIST_HEAD(wdev_list);
2060 /* Before destroying the interfaces, make sure they're all stopped so
2061 * that the hardware is stopped. Otherwise, the driver might still be
2062 * iterating the interfaces during the shutdown, e.g. from a worker
2063 * or from RX processing or similar, and if it does so (using atomic
2064 * iteration) while we're manipulating the list, the iteration will
2067 * After this, the hardware should be stopped and the driver should
2068 * have stopped all of its activities, so that we can do RCU-unaware
2069 * manipulations of the interface list below.
2071 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2073 WARN(local->open_count, "%s: open count remains %d\n",
2074 wiphy_name(local->hw.wiphy), local->open_count);
2076 ieee80211_txq_teardown_flows(local);
2078 mutex_lock(&local->iflist_mtx);
2079 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2080 list_del(&sdata->list);
2083 unregister_netdevice_queue(sdata->dev, &unreg_list);
2085 list_add(&sdata->list, &wdev_list);
2087 mutex_unlock(&local->iflist_mtx);
2088 unregister_netdevice_many(&unreg_list);
2090 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2091 list_del(&sdata->list);
2092 cfg80211_unregister_wdev(&sdata->wdev);
2097 static int netdev_notify(struct notifier_block *nb,
2098 unsigned long state, void *ptr)
2100 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2101 struct ieee80211_sub_if_data *sdata;
2103 if (state != NETDEV_CHANGENAME)
2106 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2109 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2112 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2113 memcpy(sdata->name, dev->name, IFNAMSIZ);
2114 ieee80211_debugfs_rename_netdev(sdata);
2119 static struct notifier_block mac80211_netdev_notifier = {
2120 .notifier_call = netdev_notify,
2123 int ieee80211_iface_init(void)
2125 return register_netdevice_notifier(&mac80211_netdev_notifier);
2128 void ieee80211_iface_exit(void)
2130 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2133 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2135 if (sdata->vif.type == NL80211_IFTYPE_AP)
2136 atomic_inc(&sdata->u.ap.num_mcast_sta);
2137 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2138 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2141 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2143 if (sdata->vif.type == NL80211_IFTYPE_AP)
2144 atomic_dec(&sdata->u.ap.num_mcast_sta);
2145 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2146 atomic_dec(&sdata->u.vlan.num_mcast_sta);