1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018-2021 Intel Corporation
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/kcov.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
23 #include "debugfs_netdev.h"
26 #include "driver-ops.h"
31 * DOC: Interface list locking
33 * The interface list in each struct ieee80211_local is protected
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
46 static void ieee80211_iface_work(struct work_struct *work);
48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
50 struct ieee80211_chanctx_conf *chanctx_conf;
54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
60 power = ieee80211_chandef_max_power(&chanctx_conf->def);
63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->user_power_level);
66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->ap_power_level);
69 if (power != sdata->vif.bss_conf.txpower) {
70 sdata->vif.bss_conf.txpower = power;
71 ieee80211_hw_config(sdata->local, 0);
78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
81 if (__ieee80211_recalc_txpower(sdata) ||
82 (update_bss && ieee80211_sdata_running(sdata)))
83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
86 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
92 return IEEE80211_CONF_CHANGE_IDLE;
95 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
100 ieee80211_flush_queues(local, NULL, false);
102 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
103 return IEEE80211_CONF_CHANGE_IDLE;
106 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
109 bool working, scanning, active;
110 unsigned int led_trig_start = 0, led_trig_stop = 0;
112 lockdep_assert_held(&local->mtx);
114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136 if (working || scanning || active)
137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
141 u32 ieee80211_idle_off(struct ieee80211_local *local)
143 return __ieee80211_recalc_idle(local, true);
146 void ieee80211_recalc_idle(struct ieee80211_local *local)
148 u32 change = __ieee80211_recalc_idle(local, false);
150 ieee80211_hw_config(local, change);
153 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
156 struct ieee80211_local *local = sdata->local;
157 struct ieee80211_sub_if_data *iter;
162 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
166 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
167 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
168 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170 m = local->hw.wiphy->addr_mask;
171 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178 mutex_lock(&local->iflist_mtx);
179 list_for_each_entry(iter, &local->interfaces, list) {
183 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192 if ((new & ~mask) != (tmp & ~mask)) {
197 mutex_unlock(&local->iflist_mtx);
202 static int ieee80211_change_mac(struct net_device *dev, void *addr)
204 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
205 struct sockaddr *sa = addr;
206 bool check_dup = true;
209 if (ieee80211_sdata_running(sdata))
212 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
213 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
216 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
220 ret = eth_mac_addr(dev, sa);
223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
228 static inline int identical_mac_addr_allowed(int type1, int type2)
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
235 (type1 == NL80211_IFTYPE_WDS &&
236 (type2 == NL80211_IFTYPE_WDS ||
237 type2 == NL80211_IFTYPE_AP)) ||
238 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
239 (type1 == NL80211_IFTYPE_AP_VLAN &&
240 (type2 == NL80211_IFTYPE_AP ||
241 type2 == NL80211_IFTYPE_AP_VLAN));
244 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
245 enum nl80211_iftype iftype)
247 struct ieee80211_local *local = sdata->local;
248 struct ieee80211_sub_if_data *nsdata;
253 /* we hold the RTNL here so can safely walk the list */
254 list_for_each_entry(nsdata, &local->interfaces, list) {
255 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
257 * Only OCB and monitor mode may coexist
259 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
260 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
261 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
262 nsdata->vif.type == NL80211_IFTYPE_OCB))
266 * Allow only a single IBSS interface to be up at any
267 * time. This is restricted because beacon distribution
268 * cannot work properly if both are in the same IBSS.
270 * To remove this restriction we'd have to disallow them
271 * from setting the same SSID on different IBSS interfaces
272 * belonging to the same hardware. Then, however, we're
273 * faced with having to adopt two different TSF timers...
275 if (iftype == NL80211_IFTYPE_ADHOC &&
276 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
279 * will not add another interface while any channel
282 if (nsdata->vif.csa_active)
286 * The remaining checks are only performed for interfaces
287 * with the same MAC address.
289 if (!ether_addr_equal(sdata->vif.addr,
294 * check whether it may have the same address
296 if (!identical_mac_addr_allowed(iftype,
301 * can only add VLANs to enabled APs
303 if (iftype == NL80211_IFTYPE_AP_VLAN &&
304 nsdata->vif.type == NL80211_IFTYPE_AP)
305 sdata->bss = &nsdata->u.ap;
309 mutex_lock(&local->chanctx_mtx);
310 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
311 mutex_unlock(&local->chanctx_mtx);
315 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
316 enum nl80211_iftype iftype)
318 int n_queues = sdata->local->hw.queues;
321 if (iftype == NL80211_IFTYPE_NAN)
324 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
325 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
326 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
327 IEEE80211_INVAL_HW_QUEUE))
329 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
335 if ((iftype != NL80211_IFTYPE_AP &&
336 iftype != NL80211_IFTYPE_P2P_GO &&
337 iftype != NL80211_IFTYPE_MESH_POINT) ||
338 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
339 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
343 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
346 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
352 static int ieee80211_open(struct net_device *dev)
354 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
357 /* fail early if user set an invalid address */
358 if (!is_valid_ether_addr(dev->dev_addr))
359 return -EADDRNOTAVAIL;
361 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
365 return ieee80211_do_open(&sdata->wdev, true);
368 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
371 struct ieee80211_local *local = sdata->local;
373 struct sk_buff *skb, *tmp;
374 u32 hw_reconf_flags = 0;
377 struct cfg80211_chan_def chandef;
379 struct cfg80211_nan_func *func;
381 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
383 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
385 ieee80211_scan_cancel(local);
388 * Stop TX on this interface first.
391 netif_tx_stop_all_queues(sdata->dev);
393 ieee80211_roc_purge(local, sdata);
395 switch (sdata->vif.type) {
396 case NL80211_IFTYPE_STATION:
397 ieee80211_mgd_stop(sdata);
399 case NL80211_IFTYPE_ADHOC:
400 ieee80211_ibss_stop(sdata);
402 case NL80211_IFTYPE_MONITOR:
403 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
405 list_del_rcu(&sdata->u.mntr.list);
412 * Remove all stations associated with this interface.
414 * This must be done before calling ops->remove_interface()
415 * because otherwise we can later invoke ops->sta_notify()
416 * whenever the STAs are removed, and that invalidates driver
417 * assumptions about always getting a vif pointer that is valid
418 * (because if we remove a STA after ops->remove_interface()
419 * the driver will have removed the vif info already!)
421 * In WDS mode a station must exist here and be flushed, for
422 * AP_VLANs stations may exist since there's nothing else that
423 * would have removed them, but in other modes there shouldn't
426 flushed = sta_info_flush(sdata);
427 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
428 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
429 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
431 /* don't count this interface for allmulti while it is down */
432 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
433 atomic_dec(&local->iff_allmultis);
435 if (sdata->vif.type == NL80211_IFTYPE_AP) {
437 local->fif_probe_req--;
438 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
439 local->fif_probe_req--;
443 netif_addr_lock_bh(sdata->dev);
444 spin_lock_bh(&local->filter_lock);
445 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
446 sdata->dev->addr_len);
447 spin_unlock_bh(&local->filter_lock);
448 netif_addr_unlock_bh(sdata->dev);
451 del_timer_sync(&local->dynamic_ps_timer);
452 cancel_work_sync(&local->dynamic_ps_enable_work);
454 cancel_work_sync(&sdata->recalc_smps);
456 mutex_lock(&local->mtx);
457 sdata->vif.csa_active = false;
458 if (sdata->vif.type == NL80211_IFTYPE_STATION)
459 sdata->u.mgd.csa_waiting_bcn = false;
460 if (sdata->csa_block_tx) {
461 ieee80211_wake_vif_queues(local, sdata,
462 IEEE80211_QUEUE_STOP_REASON_CSA);
463 sdata->csa_block_tx = false;
465 mutex_unlock(&local->mtx);
468 cancel_work_sync(&sdata->csa_finalize_work);
470 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
472 if (sdata->wdev.cac_started) {
473 chandef = sdata->vif.bss_conf.chandef;
474 WARN_ON(local->suspended);
475 mutex_lock(&local->mtx);
476 ieee80211_vif_release_channel(sdata);
477 mutex_unlock(&local->mtx);
478 cfg80211_cac_event(sdata->dev, &chandef,
479 NL80211_RADAR_CAC_ABORTED,
483 /* APs need special treatment */
484 if (sdata->vif.type == NL80211_IFTYPE_AP) {
485 struct ieee80211_sub_if_data *vlan, *tmpsdata;
487 /* down all dependent devices, that is VLANs */
488 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
490 dev_close(vlan->dev);
491 WARN_ON(!list_empty(&sdata->u.ap.vlans));
492 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
493 /* remove all packets in parent bc_buf pointing to this dev */
494 ps = &sdata->bss->ps;
496 spin_lock_irqsave(&ps->bc_buf.lock, flags);
497 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
498 if (skb->dev == sdata->dev) {
499 __skb_unlink(skb, &ps->bc_buf);
500 local->total_ps_buffered--;
501 ieee80211_free_txskb(&local->hw, skb);
504 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
510 switch (sdata->vif.type) {
511 case NL80211_IFTYPE_AP_VLAN:
512 mutex_lock(&local->mtx);
513 list_del(&sdata->u.vlan.list);
514 mutex_unlock(&local->mtx);
515 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
516 /* see comment in the default case below */
517 ieee80211_free_keys(sdata, true);
518 /* no need to tell driver */
520 case NL80211_IFTYPE_MONITOR:
521 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
522 local->cooked_mntrs--;
527 if (local->monitors == 0) {
528 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
529 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
532 ieee80211_adjust_monitor_flags(sdata, -1);
534 case NL80211_IFTYPE_NAN:
535 /* clean all the functions */
536 spin_lock_bh(&sdata->u.nan.func_lock);
538 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
539 idr_remove(&sdata->u.nan.function_inst_ids, i);
540 cfg80211_free_nan_func(func);
542 idr_destroy(&sdata->u.nan.function_inst_ids);
544 spin_unlock_bh(&sdata->u.nan.func_lock);
546 case NL80211_IFTYPE_P2P_DEVICE:
547 /* relies on synchronize_rcu() below */
548 RCU_INIT_POINTER(local->p2p_sdata, NULL);
551 cancel_work_sync(&sdata->work);
553 * When we get here, the interface is marked down.
554 * Free the remaining keys, if there are any
555 * (which can happen in AP mode if userspace sets
556 * keys before the interface is operating, and maybe
559 * Force the key freeing to always synchronize_net()
560 * to wait for the RX path in case it is using this
561 * interface enqueuing frames at this very time on
564 ieee80211_free_keys(sdata, true);
565 skb_queue_purge(&sdata->skb_queue);
568 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
569 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
570 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
571 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
572 if (info->control.vif == &sdata->vif) {
573 __skb_unlink(skb, &local->pending[i]);
574 ieee80211_free_txskb(&local->hw, skb);
578 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
580 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
581 ieee80211_txq_remove_vlan(local, sdata);
585 if (local->open_count == 0)
586 ieee80211_clear_tx_pending(local);
588 sdata->vif.bss_conf.beacon_int = 0;
591 * If the interface goes down while suspended, presumably because
592 * the device was unplugged and that happens before our resume,
593 * then the driver is already unconfigured and the remainder of
594 * this function isn't needed.
595 * XXX: what about WoWLAN? If the device has software state, e.g.
596 * memory allocated, it might expect teardown commands from
599 if (local->suspended) {
600 WARN_ON(local->wowlan);
601 WARN_ON(rtnl_dereference(local->monitor_sdata));
605 switch (sdata->vif.type) {
606 case NL80211_IFTYPE_AP_VLAN:
608 case NL80211_IFTYPE_MONITOR:
609 if (local->monitors == 0)
610 ieee80211_del_virtual_monitor(local);
612 mutex_lock(&local->mtx);
613 ieee80211_recalc_idle(local);
614 mutex_unlock(&local->mtx);
616 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
622 drv_remove_interface(local, sdata);
625 ieee80211_recalc_ps(local);
628 flush_delayed_work(&local->scan_work);
630 if (local->open_count == 0) {
631 ieee80211_stop_device(local);
633 /* no reconfiguring after stop! */
637 /* do after stop to avoid reconfiguring when we stop anyway */
638 ieee80211_configure_filter(local);
639 ieee80211_hw_config(local, hw_reconf_flags);
641 if (local->monitors == local->open_count)
642 ieee80211_add_virtual_monitor(local);
645 static int ieee80211_stop(struct net_device *dev)
647 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
649 ieee80211_do_stop(sdata, true);
654 static void ieee80211_set_multicast_list(struct net_device *dev)
656 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
657 struct ieee80211_local *local = sdata->local;
658 int allmulti, sdata_allmulti;
660 allmulti = !!(dev->flags & IFF_ALLMULTI);
661 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
663 if (allmulti != sdata_allmulti) {
664 if (dev->flags & IFF_ALLMULTI)
665 atomic_inc(&local->iff_allmultis);
667 atomic_dec(&local->iff_allmultis);
668 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
671 spin_lock_bh(&local->filter_lock);
672 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
673 spin_unlock_bh(&local->filter_lock);
674 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
678 * Called when the netdev is removed or, by the code below, before
679 * the interface type changes.
681 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
683 /* free extra data */
684 ieee80211_free_keys(sdata, false);
686 ieee80211_debugfs_remove_netdev(sdata);
688 ieee80211_destroy_frag_cache(&sdata->frags);
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_encap_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_encap_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 (sdata->vif.offload_flags == flags)
809 sdata->vif.offload_flags = flags;
813 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
815 struct ieee80211_local *local = sdata->local;
816 struct ieee80211_sub_if_data *bss = sdata;
819 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
823 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
826 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
827 !ieee80211_iftype_supports_encap_offload(bss->vif.type))
830 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
831 if (sdata->wdev.use_4addr &&
832 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
835 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
836 &ieee80211_dataif_ops;
839 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
841 struct ieee80211_local *local = sdata->local;
842 struct ieee80211_sub_if_data *vsdata;
844 if (ieee80211_set_sdata_offload_flags(sdata)) {
845 drv_update_vif_offload(local, sdata);
846 ieee80211_set_vif_encap_ops(sdata);
849 list_for_each_entry(vsdata, &local->interfaces, list) {
850 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
851 vsdata->bss != &sdata->u.ap)
854 ieee80211_set_vif_encap_ops(vsdata);
858 void ieee80211_recalc_offload(struct ieee80211_local *local)
860 struct ieee80211_sub_if_data *sdata;
862 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
865 mutex_lock(&local->iflist_mtx);
867 list_for_each_entry(sdata, &local->interfaces, list) {
868 if (!ieee80211_sdata_running(sdata))
871 ieee80211_recalc_sdata_offload(sdata);
874 mutex_unlock(&local->iflist_mtx);
877 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
880 struct ieee80211_local *local = sdata->local;
881 u32 flags = sdata->u.mntr.flags;
883 #define ADJUST(_f, _s) do { \
884 if (flags & MONITOR_FLAG_##_f) \
885 local->fif_##_s += offset; \
888 ADJUST(FCSFAIL, fcsfail);
889 ADJUST(PLCPFAIL, plcpfail);
890 ADJUST(CONTROL, control);
891 ADJUST(CONTROL, pspoll);
892 ADJUST(OTHER_BSS, other_bss);
897 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
899 struct ieee80211_local *local = sdata->local;
902 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
903 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
904 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
905 else if (local->hw.queues >= IEEE80211_NUM_ACS)
906 sdata->vif.hw_queue[i] = i;
908 sdata->vif.hw_queue[i] = 0;
910 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
913 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
915 struct ieee80211_sub_if_data *sdata;
918 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
923 if (local->monitor_sdata)
926 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
931 sdata->local = local;
932 sdata->vif.type = NL80211_IFTYPE_MONITOR;
933 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
934 wiphy_name(local->hw.wiphy));
935 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
937 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
939 ieee80211_set_default_queues(sdata);
941 ret = drv_add_interface(local, sdata);
943 /* ok .. stupid driver, it asked for this! */
948 set_bit(SDATA_STATE_RUNNING, &sdata->state);
950 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
956 mutex_lock(&local->iflist_mtx);
957 rcu_assign_pointer(local->monitor_sdata, sdata);
958 mutex_unlock(&local->iflist_mtx);
960 mutex_lock(&local->mtx);
961 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
962 IEEE80211_CHANCTX_EXCLUSIVE);
963 mutex_unlock(&local->mtx);
965 mutex_lock(&local->iflist_mtx);
966 RCU_INIT_POINTER(local->monitor_sdata, NULL);
967 mutex_unlock(&local->iflist_mtx);
969 drv_remove_interface(local, sdata);
974 skb_queue_head_init(&sdata->skb_queue);
975 INIT_WORK(&sdata->work, ieee80211_iface_work);
980 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
982 struct ieee80211_sub_if_data *sdata;
984 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
989 mutex_lock(&local->iflist_mtx);
991 sdata = rcu_dereference_protected(local->monitor_sdata,
992 lockdep_is_held(&local->iflist_mtx));
994 mutex_unlock(&local->iflist_mtx);
998 RCU_INIT_POINTER(local->monitor_sdata, NULL);
999 mutex_unlock(&local->iflist_mtx);
1003 mutex_lock(&local->mtx);
1004 ieee80211_vif_release_channel(sdata);
1005 mutex_unlock(&local->mtx);
1007 drv_remove_interface(local, sdata);
1013 * NOTE: Be very careful when changing this function, it must NOT return
1014 * an error on interface type changes that have been pre-checked, so most
1015 * checks should be in ieee80211_check_concurrent_iface.
1017 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1019 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1020 struct net_device *dev = wdev->netdev;
1021 struct ieee80211_local *local = sdata->local;
1022 struct sta_info *sta;
1025 u32 hw_reconf_flags = 0;
1027 switch (sdata->vif.type) {
1028 case NL80211_IFTYPE_WDS:
1029 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
1032 case NL80211_IFTYPE_AP_VLAN: {
1033 struct ieee80211_sub_if_data *master;
1038 mutex_lock(&local->mtx);
1039 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1040 mutex_unlock(&local->mtx);
1042 master = container_of(sdata->bss,
1043 struct ieee80211_sub_if_data, u.ap);
1044 sdata->control_port_protocol =
1045 master->control_port_protocol;
1046 sdata->control_port_no_encrypt =
1047 master->control_port_no_encrypt;
1048 sdata->control_port_over_nl80211 =
1049 master->control_port_over_nl80211;
1050 sdata->control_port_no_preauth =
1051 master->control_port_no_preauth;
1052 sdata->vif.cab_queue = master->vif.cab_queue;
1053 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1054 sizeof(sdata->vif.hw_queue));
1055 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1057 mutex_lock(&local->key_mtx);
1058 sdata->crypto_tx_tailroom_needed_cnt +=
1059 master->crypto_tx_tailroom_needed_cnt;
1060 mutex_unlock(&local->key_mtx);
1064 case NL80211_IFTYPE_AP:
1065 sdata->bss = &sdata->u.ap;
1067 case NL80211_IFTYPE_MESH_POINT:
1068 case NL80211_IFTYPE_STATION:
1069 case NL80211_IFTYPE_MONITOR:
1070 case NL80211_IFTYPE_ADHOC:
1071 case NL80211_IFTYPE_P2P_DEVICE:
1072 case NL80211_IFTYPE_OCB:
1073 case NL80211_IFTYPE_NAN:
1074 /* no special treatment */
1076 case NL80211_IFTYPE_UNSPECIFIED:
1077 case NUM_NL80211_IFTYPES:
1078 case NL80211_IFTYPE_P2P_CLIENT:
1079 case NL80211_IFTYPE_P2P_GO:
1085 if (local->open_count == 0) {
1086 res = drv_start(local);
1089 /* we're brought up, everything changes */
1090 hw_reconf_flags = ~0;
1091 ieee80211_led_radio(local, true);
1092 ieee80211_mod_tpt_led_trig(local,
1093 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1097 * Copy the hopefully now-present MAC address to
1098 * this interface, if it has the special null one.
1100 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1101 memcpy(dev->dev_addr,
1102 local->hw.wiphy->perm_addr,
1104 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1106 if (!is_valid_ether_addr(dev->dev_addr)) {
1107 res = -EADDRNOTAVAIL;
1112 switch (sdata->vif.type) {
1113 case NL80211_IFTYPE_AP_VLAN:
1114 /* no need to tell driver, but set carrier and chanctx */
1115 if (rtnl_dereference(sdata->bss->beacon)) {
1116 ieee80211_vif_vlan_copy_chanctx(sdata);
1117 netif_carrier_on(dev);
1118 ieee80211_set_vif_encap_ops(sdata);
1120 netif_carrier_off(dev);
1123 case NL80211_IFTYPE_MONITOR:
1124 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1125 local->cooked_mntrs++;
1129 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1130 res = drv_add_interface(local, sdata);
1133 } else if (local->monitors == 0 && local->open_count == 0) {
1134 res = ieee80211_add_virtual_monitor(local);
1139 /* must be before the call to ieee80211_configure_filter */
1141 if (local->monitors == 1) {
1142 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1143 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1146 ieee80211_adjust_monitor_flags(sdata, 1);
1147 ieee80211_configure_filter(local);
1148 ieee80211_recalc_offload(local);
1149 mutex_lock(&local->mtx);
1150 ieee80211_recalc_idle(local);
1151 mutex_unlock(&local->mtx);
1153 netif_carrier_on(dev);
1157 ieee80211_del_virtual_monitor(local);
1158 ieee80211_set_sdata_offload_flags(sdata);
1160 res = drv_add_interface(local, sdata);
1164 ieee80211_set_vif_encap_ops(sdata);
1165 res = ieee80211_check_queues(sdata,
1166 ieee80211_vif_type_p2p(&sdata->vif));
1168 goto err_del_interface;
1171 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1172 local->fif_pspoll++;
1173 local->fif_probe_req++;
1175 ieee80211_configure_filter(local);
1176 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1177 local->fif_probe_req++;
1180 if (sdata->vif.probe_req_reg)
1181 drv_config_iface_filter(local, sdata,
1185 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1186 sdata->vif.type != NL80211_IFTYPE_NAN)
1187 changed |= ieee80211_reset_erp_info(sdata);
1188 ieee80211_bss_info_change_notify(sdata, changed);
1190 switch (sdata->vif.type) {
1191 case NL80211_IFTYPE_STATION:
1192 case NL80211_IFTYPE_ADHOC:
1193 case NL80211_IFTYPE_AP:
1194 case NL80211_IFTYPE_MESH_POINT:
1195 case NL80211_IFTYPE_OCB:
1196 netif_carrier_off(dev);
1198 case NL80211_IFTYPE_WDS:
1199 case NL80211_IFTYPE_P2P_DEVICE:
1200 case NL80211_IFTYPE_NAN:
1208 * Set default queue parameters so drivers don't
1209 * need to initialise the hardware if the hardware
1210 * doesn't start up with sane defaults.
1211 * Enable QoS for anything but station interfaces.
1213 ieee80211_set_wmm_default(sdata, true,
1214 sdata->vif.type != NL80211_IFTYPE_STATION);
1217 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1219 switch (sdata->vif.type) {
1220 case NL80211_IFTYPE_WDS:
1221 /* Create STA entry for the WDS peer */
1222 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
1226 goto err_del_interface;
1229 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
1230 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
1231 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
1233 res = sta_info_insert(sta);
1235 /* STA has been freed */
1236 goto err_del_interface;
1239 rate_control_rate_init(sta);
1240 netif_carrier_on(dev);
1242 case NL80211_IFTYPE_P2P_DEVICE:
1243 rcu_assign_pointer(local->p2p_sdata, sdata);
1245 case NL80211_IFTYPE_MONITOR:
1246 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1248 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1255 * set_multicast_list will be invoked by the networking core
1256 * which will check whether any increments here were done in
1257 * error and sync them down to the hardware as filter flags.
1259 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1260 atomic_inc(&local->iff_allmultis);
1263 local->open_count++;
1265 if (hw_reconf_flags)
1266 ieee80211_hw_config(local, hw_reconf_flags);
1268 ieee80211_recalc_ps(local);
1270 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1271 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1272 local->ops->wake_tx_queue) {
1273 /* XXX: for AP_VLAN, actually track AP queues */
1275 netif_tx_start_all_queues(dev);
1277 unsigned long flags;
1278 int n_acs = IEEE80211_NUM_ACS;
1281 if (local->hw.queues < IEEE80211_NUM_ACS)
1284 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1285 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1286 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1287 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1288 for (ac = 0; ac < n_acs; ac++) {
1289 int ac_queue = sdata->vif.hw_queue[ac];
1291 if (local->queue_stop_reasons[ac_queue] == 0 &&
1292 skb_queue_empty(&local->pending[ac_queue]))
1293 netif_start_subqueue(dev, ac);
1296 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1301 drv_remove_interface(local, sdata);
1303 if (!local->open_count)
1307 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1308 mutex_lock(&local->mtx);
1309 list_del(&sdata->u.vlan.list);
1310 mutex_unlock(&local->mtx);
1312 /* might already be clear but that doesn't matter */
1313 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1317 static void ieee80211_if_free(struct net_device *dev)
1319 free_percpu(dev->tstats);
1322 static void ieee80211_if_setup(struct net_device *dev)
1325 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1326 dev->netdev_ops = &ieee80211_dataif_ops;
1327 dev->needs_free_netdev = true;
1328 dev->priv_destructor = ieee80211_if_free;
1331 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1333 ieee80211_if_setup(dev);
1334 dev->priv_flags |= IFF_NO_QUEUE;
1337 static void ieee80211_iface_work(struct work_struct *work)
1339 struct ieee80211_sub_if_data *sdata =
1340 container_of(work, struct ieee80211_sub_if_data, work);
1341 struct ieee80211_local *local = sdata->local;
1342 struct sk_buff *skb;
1343 struct sta_info *sta;
1345 if (!ieee80211_sdata_running(sdata))
1348 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1351 if (!ieee80211_can_run_worker(local))
1354 /* first process frames */
1355 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1356 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1358 if (ieee80211_is_action(mgmt->frame_control) &&
1359 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1362 mutex_lock(&local->sta_mtx);
1363 sta = sta_info_get_bss(sdata, mgmt->sa);
1365 switch (mgmt->u.action.u.addba_req.action_code) {
1366 case WLAN_ACTION_ADDBA_REQ:
1367 ieee80211_process_addba_request(
1368 local, sta, mgmt, len);
1370 case WLAN_ACTION_ADDBA_RESP:
1371 ieee80211_process_addba_resp(local, sta,
1374 case WLAN_ACTION_DELBA:
1375 ieee80211_process_delba(sdata, sta,
1383 mutex_unlock(&local->sta_mtx);
1384 } else if (ieee80211_is_action(mgmt->frame_control) &&
1385 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1386 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1387 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1388 struct ieee80211_rx_status *status;
1389 enum nl80211_band band;
1392 status = IEEE80211_SKB_RXCB(skb);
1393 band = status->band;
1394 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1396 mutex_lock(&local->sta_mtx);
1397 sta = sta_info_get_bss(sdata, mgmt->sa);
1400 ieee80211_vht_handle_opmode(sdata, sta,
1404 mutex_unlock(&local->sta_mtx);
1407 case WLAN_VHT_ACTION_GROUPID_MGMT:
1408 ieee80211_process_mu_groups(sdata, mgmt);
1414 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1415 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1416 ieee80211_sta_rx_queued_ext(sdata, skb);
1419 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1420 struct ieee80211_hdr *hdr = (void *)mgmt;
1422 * So the frame isn't mgmt, but frame_control
1423 * is at the right place anyway, of course, so
1424 * the if statement is correct.
1426 * Warn if we have other data frame types here,
1427 * they must not get here.
1429 WARN_ON(hdr->frame_control &
1430 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1431 WARN_ON(!(hdr->seq_ctrl &
1432 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1434 * This was a fragment of a frame, received while
1435 * a block-ack session was active. That cannot be
1436 * right, so terminate the session.
1438 mutex_lock(&local->sta_mtx);
1439 sta = sta_info_get_bss(sdata, mgmt->sa);
1441 u16 tid = ieee80211_get_tid(hdr);
1443 __ieee80211_stop_rx_ba_session(
1444 sta, tid, WLAN_BACK_RECIPIENT,
1445 WLAN_REASON_QSTA_REQUIRE_SETUP,
1448 mutex_unlock(&local->sta_mtx);
1449 } else switch (sdata->vif.type) {
1450 case NL80211_IFTYPE_STATION:
1451 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1453 case NL80211_IFTYPE_ADHOC:
1454 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1456 case NL80211_IFTYPE_MESH_POINT:
1457 if (!ieee80211_vif_is_mesh(&sdata->vif))
1459 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1462 WARN(1, "frame for unexpected interface type");
1469 /* then other type-dependent work */
1470 switch (sdata->vif.type) {
1471 case NL80211_IFTYPE_STATION:
1472 ieee80211_sta_work(sdata);
1474 case NL80211_IFTYPE_ADHOC:
1475 ieee80211_ibss_work(sdata);
1477 case NL80211_IFTYPE_MESH_POINT:
1478 if (!ieee80211_vif_is_mesh(&sdata->vif))
1480 ieee80211_mesh_work(sdata);
1482 case NL80211_IFTYPE_OCB:
1483 ieee80211_ocb_work(sdata);
1490 static void ieee80211_recalc_smps_work(struct work_struct *work)
1492 struct ieee80211_sub_if_data *sdata =
1493 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1495 ieee80211_recalc_smps(sdata);
1499 * Helper function to initialise an interface to a specific type.
1501 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1502 enum nl80211_iftype type)
1504 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1507 /* clear type-dependent union */
1508 memset(&sdata->u, 0, sizeof(sdata->u));
1510 /* and set some type-dependent values */
1511 sdata->vif.type = type;
1512 sdata->vif.p2p = false;
1513 sdata->wdev.iftype = type;
1515 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1516 sdata->control_port_no_encrypt = false;
1517 sdata->control_port_over_nl80211 = false;
1518 sdata->control_port_no_preauth = false;
1519 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1520 sdata->vif.bss_conf.idle = true;
1521 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1523 sdata->noack_map = 0;
1525 /* only monitor/p2p-device differ */
1527 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1528 sdata->dev->type = ARPHRD_ETHER;
1531 skb_queue_head_init(&sdata->skb_queue);
1532 INIT_WORK(&sdata->work, ieee80211_iface_work);
1533 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1534 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1535 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1536 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1539 case NL80211_IFTYPE_P2P_GO:
1540 type = NL80211_IFTYPE_AP;
1541 sdata->vif.type = type;
1542 sdata->vif.p2p = true;
1544 case NL80211_IFTYPE_AP:
1545 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1546 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1547 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1549 case NL80211_IFTYPE_P2P_CLIENT:
1550 type = NL80211_IFTYPE_STATION;
1551 sdata->vif.type = type;
1552 sdata->vif.p2p = true;
1554 case NL80211_IFTYPE_STATION:
1555 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1556 ieee80211_sta_setup_sdata(sdata);
1558 case NL80211_IFTYPE_OCB:
1559 sdata->vif.bss_conf.bssid = bssid_wildcard;
1560 ieee80211_ocb_setup_sdata(sdata);
1562 case NL80211_IFTYPE_ADHOC:
1563 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1564 ieee80211_ibss_setup_sdata(sdata);
1566 case NL80211_IFTYPE_MESH_POINT:
1567 if (ieee80211_vif_is_mesh(&sdata->vif))
1568 ieee80211_mesh_init_sdata(sdata);
1570 case NL80211_IFTYPE_MONITOR:
1571 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1572 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1573 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1574 MONITOR_FLAG_OTHER_BSS;
1576 case NL80211_IFTYPE_WDS:
1577 sdata->vif.bss_conf.bssid = NULL;
1579 case NL80211_IFTYPE_NAN:
1580 idr_init(&sdata->u.nan.function_inst_ids);
1581 spin_lock_init(&sdata->u.nan.func_lock);
1582 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1584 case NL80211_IFTYPE_AP_VLAN:
1585 case NL80211_IFTYPE_P2P_DEVICE:
1586 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1588 case NL80211_IFTYPE_UNSPECIFIED:
1589 case NUM_NL80211_IFTYPES:
1594 ieee80211_debugfs_add_netdev(sdata);
1597 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1598 enum nl80211_iftype type)
1600 struct ieee80211_local *local = sdata->local;
1602 enum nl80211_iftype internal_type = type;
1607 if (!local->ops->change_interface)
1610 switch (sdata->vif.type) {
1611 case NL80211_IFTYPE_AP:
1612 case NL80211_IFTYPE_STATION:
1613 case NL80211_IFTYPE_ADHOC:
1614 case NL80211_IFTYPE_OCB:
1616 * Could maybe also all others here?
1617 * Just not sure how that interacts
1618 * with the RX/config path e.g. for
1627 case NL80211_IFTYPE_AP:
1628 case NL80211_IFTYPE_STATION:
1629 case NL80211_IFTYPE_ADHOC:
1630 case NL80211_IFTYPE_OCB:
1632 * Could probably support everything
1633 * but WDS here (WDS do_open can fail
1634 * under memory pressure, which this
1635 * code isn't prepared to handle).
1638 case NL80211_IFTYPE_P2P_CLIENT:
1640 internal_type = NL80211_IFTYPE_STATION;
1642 case NL80211_IFTYPE_P2P_GO:
1644 internal_type = NL80211_IFTYPE_AP;
1650 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1654 ieee80211_stop_vif_queues(local, sdata,
1655 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1658 ieee80211_do_stop(sdata, false);
1660 ieee80211_teardown_sdata(sdata);
1662 ieee80211_set_sdata_offload_flags(sdata);
1663 ret = drv_change_interface(local, sdata, internal_type, p2p);
1665 type = ieee80211_vif_type_p2p(&sdata->vif);
1668 * Ignore return value here, there's not much we can do since
1669 * the driver changed the interface type internally already.
1670 * The warnings will hopefully make driver authors fix it :-)
1672 ieee80211_check_queues(sdata, type);
1674 ieee80211_setup_sdata(sdata, type);
1675 ieee80211_set_vif_encap_ops(sdata);
1677 err = ieee80211_do_open(&sdata->wdev, false);
1678 WARN(err, "type change: do_open returned %d", err);
1680 ieee80211_wake_vif_queues(local, sdata,
1681 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1685 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1686 enum nl80211_iftype type)
1692 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1695 if (ieee80211_sdata_running(sdata)) {
1696 ret = ieee80211_runtime_change_iftype(sdata, type);
1700 /* Purge and reset type-dependent state. */
1701 ieee80211_teardown_sdata(sdata);
1702 ieee80211_setup_sdata(sdata, type);
1705 /* reset some values that shouldn't be kept across type changes */
1706 if (type == NL80211_IFTYPE_STATION)
1707 sdata->u.mgd.use_4addr = false;
1712 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1713 u8 *perm_addr, enum nl80211_iftype type)
1715 struct ieee80211_sub_if_data *sdata;
1716 u64 mask, start, addr, val, inc;
1718 u8 tmp_addr[ETH_ALEN];
1721 /* default ... something at least */
1722 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1724 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1725 local->hw.wiphy->n_addresses <= 1)
1728 mutex_lock(&local->iflist_mtx);
1731 case NL80211_IFTYPE_MONITOR:
1732 /* doesn't matter */
1734 case NL80211_IFTYPE_WDS:
1735 case NL80211_IFTYPE_AP_VLAN:
1736 /* match up with an AP interface */
1737 list_for_each_entry(sdata, &local->interfaces, list) {
1738 if (sdata->vif.type != NL80211_IFTYPE_AP)
1740 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1743 /* keep default if no AP interface present */
1745 case NL80211_IFTYPE_P2P_CLIENT:
1746 case NL80211_IFTYPE_P2P_GO:
1747 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1748 list_for_each_entry(sdata, &local->interfaces, list) {
1749 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1751 if (!ieee80211_sdata_running(sdata))
1753 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1759 /* assign a new address if possible -- try n_addresses first */
1760 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1763 list_for_each_entry(sdata, &local->interfaces, list) {
1764 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1773 local->hw.wiphy->addresses[i].addr,
1779 /* try mask if available */
1780 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1783 m = local->hw.wiphy->addr_mask;
1784 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1785 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1786 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1788 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1789 /* not a contiguous mask ... not handled now! */
1790 pr_info("not contiguous\n");
1795 * Pick address of existing interface in case user changed
1796 * MAC address manually, default to perm_addr.
1798 m = local->hw.wiphy->perm_addr;
1799 list_for_each_entry(sdata, &local->interfaces, list) {
1800 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1802 m = sdata->vif.addr;
1805 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1806 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1807 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1809 inc = 1ULL<<__ffs64(mask);
1810 val = (start & mask);
1811 addr = (start & ~mask) | (val & mask);
1815 tmp_addr[5] = addr >> 0*8;
1816 tmp_addr[4] = addr >> 1*8;
1817 tmp_addr[3] = addr >> 2*8;
1818 tmp_addr[2] = addr >> 3*8;
1819 tmp_addr[1] = addr >> 4*8;
1820 tmp_addr[0] = addr >> 5*8;
1824 list_for_each_entry(sdata, &local->interfaces, list) {
1825 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1832 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1835 addr = (start & ~mask) | (val & mask);
1836 } while (addr != start);
1842 mutex_unlock(&local->iflist_mtx);
1845 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1846 unsigned char name_assign_type,
1847 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1848 struct vif_params *params)
1850 struct net_device *ndev = NULL;
1851 struct ieee80211_sub_if_data *sdata = NULL;
1852 struct txq_info *txqi;
1853 void (*if_setup)(struct net_device *dev);
1859 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1860 struct wireless_dev *wdev;
1862 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1866 wdev = &sdata->wdev;
1869 strlcpy(sdata->name, name, IFNAMSIZ);
1870 ieee80211_assign_perm_addr(local, wdev->address, type);
1871 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1873 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1877 if (local->ops->wake_tx_queue &&
1878 type != NL80211_IFTYPE_AP_VLAN &&
1879 (type != NL80211_IFTYPE_MONITOR ||
1880 (params->flags & MONITOR_FLAG_ACTIVE)))
1881 txq_size += sizeof(struct txq_info) +
1882 local->hw.txq_data_size;
1884 if (local->ops->wake_tx_queue) {
1885 if_setup = ieee80211_if_setup_no_queue;
1887 if_setup = ieee80211_if_setup;
1888 if (local->hw.queues >= IEEE80211_NUM_ACS)
1889 txqs = IEEE80211_NUM_ACS;
1892 ndev = alloc_netdev_mqs(size + txq_size,
1893 name, name_assign_type,
1898 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1899 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1901 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1903 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1904 if (!ndev->tstats) {
1909 ndev->needed_headroom = local->tx_headroom +
1910 4*6 /* four MAC addresses */
1911 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1913 + 8 /* rfc1042/bridge tunnel */
1914 - ETH_HLEN /* ethernet hard_header_len */
1915 + IEEE80211_ENCRYPT_HEADROOM;
1916 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1918 ret = dev_alloc_name(ndev, ndev->name);
1920 ieee80211_if_free(ndev);
1925 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1926 if (is_valid_ether_addr(params->macaddr))
1927 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1929 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1930 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1932 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1933 sdata = netdev_priv(ndev);
1934 ndev->ieee80211_ptr = &sdata->wdev;
1935 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1936 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1939 txqi = netdev_priv(ndev) + size;
1940 ieee80211_txq_init(sdata, NULL, txqi, 0);
1946 /* initialise type-independent data */
1947 sdata->wdev.wiphy = local->hw.wiphy;
1948 sdata->local = local;
1950 ieee80211_init_frag_cache(&sdata->frags);
1952 INIT_LIST_HEAD(&sdata->key_list);
1954 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1955 ieee80211_dfs_cac_timer_work);
1956 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1957 ieee80211_delayed_tailroom_dec);
1959 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1960 struct ieee80211_supported_band *sband;
1961 sband = local->hw.wiphy->bands[i];
1962 sdata->rc_rateidx_mask[i] =
1963 sband ? (1 << sband->n_bitrates) - 1 : 0;
1968 memcpy(sdata->rc_rateidx_mcs_mask[i],
1969 sband->ht_cap.mcs.rx_mask,
1970 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1972 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1973 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1974 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1976 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1977 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1978 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1979 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1983 ieee80211_set_default_queues(sdata);
1985 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1986 sdata->user_power_level = local->user_power_level;
1988 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1990 /* setup type-dependent data */
1991 ieee80211_setup_sdata(sdata, type);
1994 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1995 if (type == NL80211_IFTYPE_STATION)
1996 sdata->u.mgd.use_4addr = params->use_4addr;
1998 ndev->features |= local->hw.netdev_features;
1999 ndev->hw_features |= ndev->features &
2000 MAC80211_SUPPORTED_FEATURES_TX;
2002 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2004 /* MTU range is normally 256 - 2304, where the upper limit is
2005 * the maximum MSDU size. Monitor interfaces send and receive
2006 * MPDU and A-MSDU frames which may be much larger so we do
2007 * not impose an upper limit in that case.
2009 ndev->min_mtu = 256;
2010 if (type == NL80211_IFTYPE_MONITOR)
2013 ndev->max_mtu = local->hw.max_mtu;
2015 ret = register_netdevice(ndev);
2022 mutex_lock(&local->iflist_mtx);
2023 list_add_tail_rcu(&sdata->list, &local->interfaces);
2024 mutex_unlock(&local->iflist_mtx);
2027 *new_wdev = &sdata->wdev;
2032 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2036 mutex_lock(&sdata->local->iflist_mtx);
2037 list_del_rcu(&sdata->list);
2038 mutex_unlock(&sdata->local->iflist_mtx);
2041 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2046 unregister_netdevice(sdata->dev);
2048 cfg80211_unregister_wdev(&sdata->wdev);
2049 ieee80211_teardown_sdata(sdata);
2054 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2056 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2058 ieee80211_do_stop(sdata, true);
2061 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2063 struct ieee80211_sub_if_data *sdata, *tmp;
2064 LIST_HEAD(unreg_list);
2065 LIST_HEAD(wdev_list);
2069 /* Before destroying the interfaces, make sure they're all stopped so
2070 * that the hardware is stopped. Otherwise, the driver might still be
2071 * iterating the interfaces during the shutdown, e.g. from a worker
2072 * or from RX processing or similar, and if it does so (using atomic
2073 * iteration) while we're manipulating the list, the iteration will
2076 * After this, the hardware should be stopped and the driver should
2077 * have stopped all of its activities, so that we can do RCU-unaware
2078 * manipulations of the interface list below.
2080 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2082 WARN(local->open_count, "%s: open count remains %d\n",
2083 wiphy_name(local->hw.wiphy), local->open_count);
2085 ieee80211_txq_teardown_flows(local);
2087 mutex_lock(&local->iflist_mtx);
2088 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2089 list_del(&sdata->list);
2092 unregister_netdevice_queue(sdata->dev, &unreg_list);
2094 list_add(&sdata->list, &wdev_list);
2096 mutex_unlock(&local->iflist_mtx);
2097 unregister_netdevice_many(&unreg_list);
2099 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2100 list_del(&sdata->list);
2101 cfg80211_unregister_wdev(&sdata->wdev);
2106 static int netdev_notify(struct notifier_block *nb,
2107 unsigned long state, void *ptr)
2109 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2110 struct ieee80211_sub_if_data *sdata;
2112 if (state != NETDEV_CHANGENAME)
2115 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2118 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2121 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2122 memcpy(sdata->name, dev->name, IFNAMSIZ);
2123 ieee80211_debugfs_rename_netdev(sdata);
2128 static struct notifier_block mac80211_netdev_notifier = {
2129 .notifier_call = netdev_notify,
2132 int ieee80211_iface_init(void)
2134 return register_netdevice_notifier(&mac80211_netdev_notifier);
2137 void ieee80211_iface_exit(void)
2139 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2142 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2144 if (sdata->vif.type == NL80211_IFTYPE_AP)
2145 atomic_inc(&sdata->u.ap.num_mcast_sta);
2146 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2147 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2150 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2152 if (sdata->vif.type == NL80211_IFTYPE_AP)
2153 atomic_dec(&sdata->u.ap.num_mcast_sta);
2154 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2155 atomic_dec(&sdata->u.vlan.num_mcast_sta);