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 <linux/kcov.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
23 #include "debugfs_netdev.h"
26 #include "driver-ops.h"
31 * DOC: Interface list locking
33 * The interface list in each struct ieee80211_local is protected
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
46 static void ieee80211_iface_work(struct work_struct *work);
48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
50 struct ieee80211_chanctx_conf *chanctx_conf;
54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
60 power = ieee80211_chandef_max_power(&chanctx_conf->def);
63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->user_power_level);
66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->ap_power_level);
69 if (power != sdata->vif.bss_conf.txpower) {
70 sdata->vif.bss_conf.txpower = power;
71 ieee80211_hw_config(sdata->local, 0);
78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
81 if (__ieee80211_recalc_txpower(sdata) ||
82 (update_bss && ieee80211_sdata_running(sdata)))
83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
86 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
92 return IEEE80211_CONF_CHANGE_IDLE;
95 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
100 ieee80211_flush_queues(local, NULL, false);
102 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
103 return IEEE80211_CONF_CHANGE_IDLE;
106 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
109 bool working, scanning, active;
110 unsigned int led_trig_start = 0, led_trig_stop = 0;
112 lockdep_assert_held(&local->mtx);
114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136 if (working || scanning || active)
137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
141 u32 ieee80211_idle_off(struct ieee80211_local *local)
143 return __ieee80211_recalc_idle(local, true);
146 void ieee80211_recalc_idle(struct ieee80211_local *local)
148 u32 change = __ieee80211_recalc_idle(local, false);
150 ieee80211_hw_config(local, change);
153 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
156 struct ieee80211_local *local = sdata->local;
157 struct ieee80211_sub_if_data *iter;
162 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
166 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
167 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
168 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170 m = local->hw.wiphy->addr_mask;
171 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178 mutex_lock(&local->iflist_mtx);
179 list_for_each_entry(iter, &local->interfaces, list) {
183 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192 if ((new & ~mask) != (tmp & ~mask)) {
197 mutex_unlock(&local->iflist_mtx);
202 static int ieee80211_change_mac(struct net_device *dev, void *addr)
204 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
205 struct sockaddr *sa = addr;
206 bool check_dup = true;
209 if (ieee80211_sdata_running(sdata))
212 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
213 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
216 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
220 ret = eth_mac_addr(dev, sa);
223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
228 static inline int identical_mac_addr_allowed(int type1, int type2)
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
235 (type1 == NL80211_IFTYPE_AP_VLAN &&
236 (type2 == NL80211_IFTYPE_AP ||
237 type2 == NL80211_IFTYPE_AP_VLAN));
240 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
241 enum nl80211_iftype iftype)
243 struct ieee80211_local *local = sdata->local;
244 struct ieee80211_sub_if_data *nsdata;
249 /* we hold the RTNL here so can safely walk the list */
250 list_for_each_entry(nsdata, &local->interfaces, list) {
251 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
253 * Only OCB and monitor mode may coexist
255 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
256 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
257 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
258 nsdata->vif.type == NL80211_IFTYPE_OCB))
262 * Allow only a single IBSS interface to be up at any
263 * time. This is restricted because beacon distribution
264 * cannot work properly if both are in the same IBSS.
266 * To remove this restriction we'd have to disallow them
267 * from setting the same SSID on different IBSS interfaces
268 * belonging to the same hardware. Then, however, we're
269 * faced with having to adopt two different TSF timers...
271 if (iftype == NL80211_IFTYPE_ADHOC &&
272 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
275 * will not add another interface while any channel
278 if (nsdata->vif.csa_active)
282 * The remaining checks are only performed for interfaces
283 * with the same MAC address.
285 if (!ether_addr_equal(sdata->vif.addr,
290 * check whether it may have the same address
292 if (!identical_mac_addr_allowed(iftype,
297 * can only add VLANs to enabled APs
299 if (iftype == NL80211_IFTYPE_AP_VLAN &&
300 nsdata->vif.type == NL80211_IFTYPE_AP)
301 sdata->bss = &nsdata->u.ap;
305 mutex_lock(&local->chanctx_mtx);
306 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
307 mutex_unlock(&local->chanctx_mtx);
311 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
314 int n_queues = sdata->local->hw.queues;
317 if (iftype == NL80211_IFTYPE_NAN)
320 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
321 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
323 IEEE80211_INVAL_HW_QUEUE))
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
331 if ((iftype != NL80211_IFTYPE_AP &&
332 iftype != NL80211_IFTYPE_P2P_GO &&
333 iftype != NL80211_IFTYPE_MESH_POINT) ||
334 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
335 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
339 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
342 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
348 static int ieee80211_open(struct net_device *dev)
350 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
353 /* fail early if user set an invalid address */
354 if (!is_valid_ether_addr(dev->dev_addr))
355 return -EADDRNOTAVAIL;
357 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
361 wiphy_lock(sdata->local->hw.wiphy);
362 err = ieee80211_do_open(&sdata->wdev, true);
363 wiphy_unlock(sdata->local->hw.wiphy);
368 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
370 struct ieee80211_local *local = sdata->local;
372 struct sk_buff *skb, *tmp;
373 u32 hw_reconf_flags = 0;
376 struct cfg80211_chan_def chandef;
378 struct cfg80211_nan_func *func;
380 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
382 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
384 ieee80211_scan_cancel(local);
387 * Stop TX on this interface first.
390 netif_tx_stop_all_queues(sdata->dev);
392 ieee80211_roc_purge(local, sdata);
394 switch (sdata->vif.type) {
395 case NL80211_IFTYPE_STATION:
396 ieee80211_mgd_stop(sdata);
398 case NL80211_IFTYPE_ADHOC:
399 ieee80211_ibss_stop(sdata);
401 case NL80211_IFTYPE_MONITOR:
402 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
404 list_del_rcu(&sdata->u.mntr.list);
411 * Remove all stations associated with this interface.
413 * This must be done before calling ops->remove_interface()
414 * because otherwise we can later invoke ops->sta_notify()
415 * whenever the STAs are removed, and that invalidates driver
416 * assumptions about always getting a vif pointer that is valid
417 * (because if we remove a STA after ops->remove_interface()
418 * the driver will have removed the vif info already!)
420 * For AP_VLANs stations may exist since there's nothing else that
421 * would have removed them, but in other modes there shouldn't
424 flushed = sta_info_flush(sdata);
425 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
427 /* don't count this interface for allmulti while it is down */
428 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
429 atomic_dec(&local->iff_allmultis);
431 if (sdata->vif.type == NL80211_IFTYPE_AP) {
433 local->fif_probe_req--;
434 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
435 local->fif_probe_req--;
439 netif_addr_lock_bh(sdata->dev);
440 spin_lock_bh(&local->filter_lock);
441 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
442 sdata->dev->addr_len);
443 spin_unlock_bh(&local->filter_lock);
444 netif_addr_unlock_bh(sdata->dev);
447 del_timer_sync(&local->dynamic_ps_timer);
448 cancel_work_sync(&local->dynamic_ps_enable_work);
450 cancel_work_sync(&sdata->recalc_smps);
452 mutex_lock(&local->mtx);
453 sdata->vif.csa_active = false;
454 if (sdata->vif.type == NL80211_IFTYPE_STATION)
455 sdata->u.mgd.csa_waiting_bcn = false;
456 if (sdata->csa_block_tx) {
457 ieee80211_wake_vif_queues(local, sdata,
458 IEEE80211_QUEUE_STOP_REASON_CSA);
459 sdata->csa_block_tx = false;
461 mutex_unlock(&local->mtx);
464 cancel_work_sync(&sdata->csa_finalize_work);
466 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
468 if (sdata->wdev.cac_started) {
469 chandef = sdata->vif.bss_conf.chandef;
470 WARN_ON(local->suspended);
471 mutex_lock(&local->mtx);
472 ieee80211_vif_release_channel(sdata);
473 mutex_unlock(&local->mtx);
474 cfg80211_cac_event(sdata->dev, &chandef,
475 NL80211_RADAR_CAC_ABORTED,
479 /* APs need special treatment */
480 if (sdata->vif.type == NL80211_IFTYPE_AP) {
481 struct ieee80211_sub_if_data *vlan, *tmpsdata;
483 /* down all dependent devices, that is VLANs */
484 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
486 dev_close(vlan->dev);
487 WARN_ON(!list_empty(&sdata->u.ap.vlans));
488 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
489 /* remove all packets in parent bc_buf pointing to this dev */
490 ps = &sdata->bss->ps;
492 spin_lock_irqsave(&ps->bc_buf.lock, flags);
493 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
494 if (skb->dev == sdata->dev) {
495 __skb_unlink(skb, &ps->bc_buf);
496 local->total_ps_buffered--;
497 ieee80211_free_txskb(&local->hw, skb);
500 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
506 switch (sdata->vif.type) {
507 case NL80211_IFTYPE_AP_VLAN:
508 mutex_lock(&local->mtx);
509 list_del(&sdata->u.vlan.list);
510 mutex_unlock(&local->mtx);
511 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
512 /* see comment in the default case below */
513 ieee80211_free_keys(sdata, true);
514 /* no need to tell driver */
516 case NL80211_IFTYPE_MONITOR:
517 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
518 local->cooked_mntrs--;
523 if (local->monitors == 0) {
524 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
525 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
528 ieee80211_adjust_monitor_flags(sdata, -1);
530 case NL80211_IFTYPE_NAN:
531 /* clean all the functions */
532 spin_lock_bh(&sdata->u.nan.func_lock);
534 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
535 idr_remove(&sdata->u.nan.function_inst_ids, i);
536 cfg80211_free_nan_func(func);
538 idr_destroy(&sdata->u.nan.function_inst_ids);
540 spin_unlock_bh(&sdata->u.nan.func_lock);
542 case NL80211_IFTYPE_P2P_DEVICE:
543 /* relies on synchronize_rcu() below */
544 RCU_INIT_POINTER(local->p2p_sdata, NULL);
547 cancel_work_sync(&sdata->work);
549 * When we get here, the interface is marked down.
550 * Free the remaining keys, if there are any
551 * (which can happen in AP mode if userspace sets
552 * keys before the interface is operating)
554 * Force the key freeing to always synchronize_net()
555 * to wait for the RX path in case it is using this
556 * interface enqueuing frames at this very time on
559 ieee80211_free_keys(sdata, true);
560 skb_queue_purge(&sdata->skb_queue);
563 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
564 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
565 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
566 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
567 if (info->control.vif == &sdata->vif) {
568 __skb_unlink(skb, &local->pending[i]);
569 ieee80211_free_txskb(&local->hw, skb);
573 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
575 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
576 ieee80211_txq_remove_vlan(local, sdata);
580 if (local->open_count == 0)
581 ieee80211_clear_tx_pending(local);
583 sdata->vif.bss_conf.beacon_int = 0;
586 * If the interface goes down while suspended, presumably because
587 * the device was unplugged and that happens before our resume,
588 * then the driver is already unconfigured and the remainder of
589 * this function isn't needed.
590 * XXX: what about WoWLAN? If the device has software state, e.g.
591 * memory allocated, it might expect teardown commands from
594 if (local->suspended) {
595 WARN_ON(local->wowlan);
596 WARN_ON(rtnl_dereference(local->monitor_sdata));
600 switch (sdata->vif.type) {
601 case NL80211_IFTYPE_AP_VLAN:
603 case NL80211_IFTYPE_MONITOR:
604 if (local->monitors == 0)
605 ieee80211_del_virtual_monitor(local);
607 mutex_lock(&local->mtx);
608 ieee80211_recalc_idle(local);
609 mutex_unlock(&local->mtx);
611 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
617 drv_remove_interface(local, sdata);
620 ieee80211_recalc_ps(local);
623 flush_delayed_work(&local->scan_work);
625 if (local->open_count == 0) {
626 ieee80211_stop_device(local);
628 /* no reconfiguring after stop! */
632 /* do after stop to avoid reconfiguring when we stop anyway */
633 ieee80211_configure_filter(local);
634 ieee80211_hw_config(local, hw_reconf_flags);
636 if (local->monitors == local->open_count)
637 ieee80211_add_virtual_monitor(local);
640 static int ieee80211_stop(struct net_device *dev)
642 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
644 wiphy_lock(sdata->local->hw.wiphy);
645 ieee80211_do_stop(sdata, true);
646 wiphy_unlock(sdata->local->hw.wiphy);
651 static void ieee80211_set_multicast_list(struct net_device *dev)
653 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
654 struct ieee80211_local *local = sdata->local;
655 int allmulti, sdata_allmulti;
657 allmulti = !!(dev->flags & IFF_ALLMULTI);
658 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
660 if (allmulti != sdata_allmulti) {
661 if (dev->flags & IFF_ALLMULTI)
662 atomic_inc(&local->iff_allmultis);
664 atomic_dec(&local->iff_allmultis);
665 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
668 spin_lock_bh(&local->filter_lock);
669 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
670 spin_unlock_bh(&local->filter_lock);
671 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
675 * Called when the netdev is removed or, by the code below, before
676 * the interface type changes.
678 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
682 /* free extra data */
683 ieee80211_free_keys(sdata, false);
685 ieee80211_debugfs_remove_netdev(sdata);
687 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
688 __skb_queue_purge(&sdata->fragments[i].skb_list);
689 sdata->fragment_next = 0;
691 if (ieee80211_vif_is_mesh(&sdata->vif))
692 ieee80211_mesh_teardown_sdata(sdata);
695 static void ieee80211_uninit(struct net_device *dev)
697 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
700 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
702 struct net_device *sb_dev)
704 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
708 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
710 dev_fetch_sw_netstats(stats, dev->tstats);
713 static const struct net_device_ops ieee80211_dataif_ops = {
714 .ndo_open = ieee80211_open,
715 .ndo_stop = ieee80211_stop,
716 .ndo_uninit = ieee80211_uninit,
717 .ndo_start_xmit = ieee80211_subif_start_xmit,
718 .ndo_set_rx_mode = ieee80211_set_multicast_list,
719 .ndo_set_mac_address = ieee80211_change_mac,
720 .ndo_select_queue = ieee80211_netdev_select_queue,
721 .ndo_get_stats64 = ieee80211_get_stats64,
724 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
726 struct net_device *sb_dev)
728 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
729 struct ieee80211_local *local = sdata->local;
730 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
731 struct ieee80211_hdr *hdr;
734 if (local->hw.queues < IEEE80211_NUM_ACS)
737 /* reset flags and info before parsing radiotap header */
738 memset(info, 0, sizeof(*info));
740 if (!ieee80211_parse_tx_radiotap(skb, dev))
741 return 0; /* doesn't matter, frame will be dropped */
743 len_rthdr = ieee80211_get_radiotap_len(skb->data);
744 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
745 if (skb->len < len_rthdr + 2 ||
746 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
747 return 0; /* doesn't matter, frame will be dropped */
749 return ieee80211_select_queue_80211(sdata, skb, hdr);
752 static const struct net_device_ops ieee80211_monitorif_ops = {
753 .ndo_open = ieee80211_open,
754 .ndo_stop = ieee80211_stop,
755 .ndo_uninit = ieee80211_uninit,
756 .ndo_start_xmit = ieee80211_monitor_start_xmit,
757 .ndo_set_rx_mode = ieee80211_set_multicast_list,
758 .ndo_set_mac_address = ieee80211_change_mac,
759 .ndo_select_queue = ieee80211_monitor_select_queue,
760 .ndo_get_stats64 = ieee80211_get_stats64,
763 static const struct net_device_ops ieee80211_dataif_8023_ops = {
764 .ndo_open = ieee80211_open,
765 .ndo_stop = ieee80211_stop,
766 .ndo_uninit = ieee80211_uninit,
767 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
768 .ndo_set_rx_mode = ieee80211_set_multicast_list,
769 .ndo_set_mac_address = ieee80211_change_mac,
770 .ndo_select_queue = ieee80211_netdev_select_queue,
771 .ndo_get_stats64 = ieee80211_get_stats64,
774 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
777 /* P2P GO and client are mapped to AP/STATION types */
778 case NL80211_IFTYPE_AP:
779 case NL80211_IFTYPE_STATION:
786 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
788 struct ieee80211_local *local = sdata->local;
791 flags = sdata->vif.offload_flags;
793 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
794 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
795 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
797 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
798 local->hw.wiphy->frag_threshold != (u32)-1)
799 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
802 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
804 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
807 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
808 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
809 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
811 if (local->monitors &&
812 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
813 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
815 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
818 if (sdata->vif.offload_flags == flags)
821 sdata->vif.offload_flags = flags;
822 ieee80211_check_fast_rx_iface(sdata);
826 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
828 struct ieee80211_local *local = sdata->local;
829 struct ieee80211_sub_if_data *bss = sdata;
832 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
836 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
839 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
840 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
843 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
844 if (sdata->wdev.use_4addr &&
845 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
848 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
849 &ieee80211_dataif_ops;
852 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
854 struct ieee80211_local *local = sdata->local;
855 struct ieee80211_sub_if_data *vsdata;
857 if (ieee80211_set_sdata_offload_flags(sdata)) {
858 drv_update_vif_offload(local, sdata);
859 ieee80211_set_vif_encap_ops(sdata);
862 list_for_each_entry(vsdata, &local->interfaces, list) {
863 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
864 vsdata->bss != &sdata->u.ap)
867 ieee80211_set_vif_encap_ops(vsdata);
871 void ieee80211_recalc_offload(struct ieee80211_local *local)
873 struct ieee80211_sub_if_data *sdata;
875 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
878 mutex_lock(&local->iflist_mtx);
880 list_for_each_entry(sdata, &local->interfaces, list) {
881 if (!ieee80211_sdata_running(sdata))
884 ieee80211_recalc_sdata_offload(sdata);
887 mutex_unlock(&local->iflist_mtx);
890 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
893 struct ieee80211_local *local = sdata->local;
894 u32 flags = sdata->u.mntr.flags;
896 #define ADJUST(_f, _s) do { \
897 if (flags & MONITOR_FLAG_##_f) \
898 local->fif_##_s += offset; \
901 ADJUST(FCSFAIL, fcsfail);
902 ADJUST(PLCPFAIL, plcpfail);
903 ADJUST(CONTROL, control);
904 ADJUST(CONTROL, pspoll);
905 ADJUST(OTHER_BSS, other_bss);
910 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
912 struct ieee80211_local *local = sdata->local;
915 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
916 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
917 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
918 else if (local->hw.queues >= IEEE80211_NUM_ACS)
919 sdata->vif.hw_queue[i] = i;
921 sdata->vif.hw_queue[i] = 0;
923 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
926 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
928 struct ieee80211_sub_if_data *sdata;
931 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
936 if (local->monitor_sdata)
939 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
944 sdata->local = local;
945 sdata->vif.type = NL80211_IFTYPE_MONITOR;
946 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
947 wiphy_name(local->hw.wiphy));
948 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
950 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
952 ieee80211_set_default_queues(sdata);
954 ret = drv_add_interface(local, sdata);
956 /* ok .. stupid driver, it asked for this! */
961 set_bit(SDATA_STATE_RUNNING, &sdata->state);
963 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
969 mutex_lock(&local->iflist_mtx);
970 rcu_assign_pointer(local->monitor_sdata, sdata);
971 mutex_unlock(&local->iflist_mtx);
973 mutex_lock(&local->mtx);
974 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
975 IEEE80211_CHANCTX_EXCLUSIVE);
976 mutex_unlock(&local->mtx);
978 mutex_lock(&local->iflist_mtx);
979 RCU_INIT_POINTER(local->monitor_sdata, NULL);
980 mutex_unlock(&local->iflist_mtx);
982 drv_remove_interface(local, sdata);
987 skb_queue_head_init(&sdata->skb_queue);
988 INIT_WORK(&sdata->work, ieee80211_iface_work);
993 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
995 struct ieee80211_sub_if_data *sdata;
997 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1002 mutex_lock(&local->iflist_mtx);
1004 sdata = rcu_dereference_protected(local->monitor_sdata,
1005 lockdep_is_held(&local->iflist_mtx));
1007 mutex_unlock(&local->iflist_mtx);
1011 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1012 mutex_unlock(&local->iflist_mtx);
1016 mutex_lock(&local->mtx);
1017 ieee80211_vif_release_channel(sdata);
1018 mutex_unlock(&local->mtx);
1020 drv_remove_interface(local, sdata);
1026 * NOTE: Be very careful when changing this function, it must NOT return
1027 * an error on interface type changes that have been pre-checked, so most
1028 * checks should be in ieee80211_check_concurrent_iface.
1030 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1032 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1033 struct net_device *dev = wdev->netdev;
1034 struct ieee80211_local *local = sdata->local;
1037 u32 hw_reconf_flags = 0;
1039 switch (sdata->vif.type) {
1040 case NL80211_IFTYPE_AP_VLAN: {
1041 struct ieee80211_sub_if_data *master;
1046 mutex_lock(&local->mtx);
1047 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1048 mutex_unlock(&local->mtx);
1050 master = container_of(sdata->bss,
1051 struct ieee80211_sub_if_data, u.ap);
1052 sdata->control_port_protocol =
1053 master->control_port_protocol;
1054 sdata->control_port_no_encrypt =
1055 master->control_port_no_encrypt;
1056 sdata->control_port_over_nl80211 =
1057 master->control_port_over_nl80211;
1058 sdata->control_port_no_preauth =
1059 master->control_port_no_preauth;
1060 sdata->vif.cab_queue = master->vif.cab_queue;
1061 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1062 sizeof(sdata->vif.hw_queue));
1063 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1065 mutex_lock(&local->key_mtx);
1066 sdata->crypto_tx_tailroom_needed_cnt +=
1067 master->crypto_tx_tailroom_needed_cnt;
1068 mutex_unlock(&local->key_mtx);
1072 case NL80211_IFTYPE_AP:
1073 sdata->bss = &sdata->u.ap;
1075 case NL80211_IFTYPE_MESH_POINT:
1076 case NL80211_IFTYPE_STATION:
1077 case NL80211_IFTYPE_MONITOR:
1078 case NL80211_IFTYPE_ADHOC:
1079 case NL80211_IFTYPE_P2P_DEVICE:
1080 case NL80211_IFTYPE_OCB:
1081 case NL80211_IFTYPE_NAN:
1082 /* no special treatment */
1084 case NL80211_IFTYPE_UNSPECIFIED:
1085 case NUM_NL80211_IFTYPES:
1086 case NL80211_IFTYPE_P2P_CLIENT:
1087 case NL80211_IFTYPE_P2P_GO:
1088 case NL80211_IFTYPE_WDS:
1094 if (local->open_count == 0) {
1095 res = drv_start(local);
1098 /* we're brought up, everything changes */
1099 hw_reconf_flags = ~0;
1100 ieee80211_led_radio(local, true);
1101 ieee80211_mod_tpt_led_trig(local,
1102 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1106 * Copy the hopefully now-present MAC address to
1107 * this interface, if it has the special null one.
1109 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1110 memcpy(dev->dev_addr,
1111 local->hw.wiphy->perm_addr,
1113 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1115 if (!is_valid_ether_addr(dev->dev_addr)) {
1116 res = -EADDRNOTAVAIL;
1121 switch (sdata->vif.type) {
1122 case NL80211_IFTYPE_AP_VLAN:
1123 /* no need to tell driver, but set carrier and chanctx */
1124 if (rtnl_dereference(sdata->bss->beacon)) {
1125 ieee80211_vif_vlan_copy_chanctx(sdata);
1126 netif_carrier_on(dev);
1127 ieee80211_set_vif_encap_ops(sdata);
1129 netif_carrier_off(dev);
1132 case NL80211_IFTYPE_MONITOR:
1133 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1134 local->cooked_mntrs++;
1138 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1139 res = drv_add_interface(local, sdata);
1142 } else if (local->monitors == 0 && local->open_count == 0) {
1143 res = ieee80211_add_virtual_monitor(local);
1148 /* must be before the call to ieee80211_configure_filter */
1150 if (local->monitors == 1) {
1151 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1152 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1155 ieee80211_adjust_monitor_flags(sdata, 1);
1156 ieee80211_configure_filter(local);
1157 ieee80211_recalc_offload(local);
1158 mutex_lock(&local->mtx);
1159 ieee80211_recalc_idle(local);
1160 mutex_unlock(&local->mtx);
1162 netif_carrier_on(dev);
1166 ieee80211_del_virtual_monitor(local);
1167 ieee80211_set_sdata_offload_flags(sdata);
1169 res = drv_add_interface(local, sdata);
1173 ieee80211_set_vif_encap_ops(sdata);
1174 res = ieee80211_check_queues(sdata,
1175 ieee80211_vif_type_p2p(&sdata->vif));
1177 goto err_del_interface;
1180 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1181 local->fif_pspoll++;
1182 local->fif_probe_req++;
1184 ieee80211_configure_filter(local);
1185 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1186 local->fif_probe_req++;
1189 if (sdata->vif.probe_req_reg)
1190 drv_config_iface_filter(local, sdata,
1194 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1195 sdata->vif.type != NL80211_IFTYPE_NAN)
1196 changed |= ieee80211_reset_erp_info(sdata);
1197 ieee80211_bss_info_change_notify(sdata, changed);
1199 switch (sdata->vif.type) {
1200 case NL80211_IFTYPE_STATION:
1201 case NL80211_IFTYPE_ADHOC:
1202 case NL80211_IFTYPE_AP:
1203 case NL80211_IFTYPE_MESH_POINT:
1204 case NL80211_IFTYPE_OCB:
1205 netif_carrier_off(dev);
1207 case NL80211_IFTYPE_P2P_DEVICE:
1208 case NL80211_IFTYPE_NAN:
1216 * Set default queue parameters so drivers don't
1217 * need to initialise the hardware if the hardware
1218 * doesn't start up with sane defaults.
1219 * Enable QoS for anything but station interfaces.
1221 ieee80211_set_wmm_default(sdata, true,
1222 sdata->vif.type != NL80211_IFTYPE_STATION);
1225 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1227 switch (sdata->vif.type) {
1228 case NL80211_IFTYPE_P2P_DEVICE:
1229 rcu_assign_pointer(local->p2p_sdata, sdata);
1231 case NL80211_IFTYPE_MONITOR:
1232 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1234 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1241 * set_multicast_list will be invoked by the networking core
1242 * which will check whether any increments here were done in
1243 * error and sync them down to the hardware as filter flags.
1245 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1246 atomic_inc(&local->iff_allmultis);
1249 local->open_count++;
1251 if (hw_reconf_flags)
1252 ieee80211_hw_config(local, hw_reconf_flags);
1254 ieee80211_recalc_ps(local);
1256 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1257 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1258 local->ops->wake_tx_queue) {
1259 /* XXX: for AP_VLAN, actually track AP queues */
1261 netif_tx_start_all_queues(dev);
1263 unsigned long flags;
1264 int n_acs = IEEE80211_NUM_ACS;
1267 if (local->hw.queues < IEEE80211_NUM_ACS)
1270 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1271 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1272 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1273 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1274 for (ac = 0; ac < n_acs; ac++) {
1275 int ac_queue = sdata->vif.hw_queue[ac];
1277 if (local->queue_stop_reasons[ac_queue] == 0 &&
1278 skb_queue_empty(&local->pending[ac_queue]))
1279 netif_start_subqueue(dev, ac);
1282 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1287 drv_remove_interface(local, sdata);
1289 if (!local->open_count)
1293 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1294 mutex_lock(&local->mtx);
1295 list_del(&sdata->u.vlan.list);
1296 mutex_unlock(&local->mtx);
1298 /* might already be clear but that doesn't matter */
1299 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1303 static void ieee80211_if_free(struct net_device *dev)
1305 free_percpu(dev->tstats);
1308 static void ieee80211_if_setup(struct net_device *dev)
1311 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1312 dev->netdev_ops = &ieee80211_dataif_ops;
1313 dev->needs_free_netdev = true;
1314 dev->priv_destructor = ieee80211_if_free;
1317 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1319 ieee80211_if_setup(dev);
1320 dev->priv_flags |= IFF_NO_QUEUE;
1323 static void ieee80211_iface_work(struct work_struct *work)
1325 struct ieee80211_sub_if_data *sdata =
1326 container_of(work, struct ieee80211_sub_if_data, work);
1327 struct ieee80211_local *local = sdata->local;
1328 struct sk_buff *skb;
1329 struct sta_info *sta;
1331 if (!ieee80211_sdata_running(sdata))
1334 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1337 if (!ieee80211_can_run_worker(local))
1340 /* first process frames */
1341 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1342 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1344 kcov_remote_start_common(skb_get_kcov_handle(skb));
1345 if (ieee80211_is_action(mgmt->frame_control) &&
1346 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1349 mutex_lock(&local->sta_mtx);
1350 sta = sta_info_get_bss(sdata, mgmt->sa);
1352 switch (mgmt->u.action.u.addba_req.action_code) {
1353 case WLAN_ACTION_ADDBA_REQ:
1354 ieee80211_process_addba_request(
1355 local, sta, mgmt, len);
1357 case WLAN_ACTION_ADDBA_RESP:
1358 ieee80211_process_addba_resp(local, sta,
1361 case WLAN_ACTION_DELBA:
1362 ieee80211_process_delba(sdata, sta,
1370 mutex_unlock(&local->sta_mtx);
1371 } else if (ieee80211_is_action(mgmt->frame_control) &&
1372 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1373 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1374 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1375 struct ieee80211_rx_status *status;
1376 enum nl80211_band band;
1379 status = IEEE80211_SKB_RXCB(skb);
1380 band = status->band;
1381 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1383 mutex_lock(&local->sta_mtx);
1384 sta = sta_info_get_bss(sdata, mgmt->sa);
1387 ieee80211_vht_handle_opmode(sdata, sta,
1391 mutex_unlock(&local->sta_mtx);
1394 case WLAN_VHT_ACTION_GROUPID_MGMT:
1395 ieee80211_process_mu_groups(sdata, mgmt);
1401 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1402 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1403 ieee80211_sta_rx_queued_ext(sdata, skb);
1406 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1407 struct ieee80211_hdr *hdr = (void *)mgmt;
1409 * So the frame isn't mgmt, but frame_control
1410 * is at the right place anyway, of course, so
1411 * the if statement is correct.
1413 * Warn if we have other data frame types here,
1414 * they must not get here.
1416 WARN_ON(hdr->frame_control &
1417 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1418 WARN_ON(!(hdr->seq_ctrl &
1419 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1421 * This was a fragment of a frame, received while
1422 * a block-ack session was active. That cannot be
1423 * right, so terminate the session.
1425 mutex_lock(&local->sta_mtx);
1426 sta = sta_info_get_bss(sdata, mgmt->sa);
1428 u16 tid = ieee80211_get_tid(hdr);
1430 __ieee80211_stop_rx_ba_session(
1431 sta, tid, WLAN_BACK_RECIPIENT,
1432 WLAN_REASON_QSTA_REQUIRE_SETUP,
1435 mutex_unlock(&local->sta_mtx);
1436 } else switch (sdata->vif.type) {
1437 case NL80211_IFTYPE_STATION:
1438 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1440 case NL80211_IFTYPE_ADHOC:
1441 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1443 case NL80211_IFTYPE_MESH_POINT:
1444 if (!ieee80211_vif_is_mesh(&sdata->vif))
1446 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1449 WARN(1, "frame for unexpected interface type");
1457 /* then other type-dependent work */
1458 switch (sdata->vif.type) {
1459 case NL80211_IFTYPE_STATION:
1460 ieee80211_sta_work(sdata);
1462 case NL80211_IFTYPE_ADHOC:
1463 ieee80211_ibss_work(sdata);
1465 case NL80211_IFTYPE_MESH_POINT:
1466 if (!ieee80211_vif_is_mesh(&sdata->vif))
1468 ieee80211_mesh_work(sdata);
1470 case NL80211_IFTYPE_OCB:
1471 ieee80211_ocb_work(sdata);
1478 static void ieee80211_recalc_smps_work(struct work_struct *work)
1480 struct ieee80211_sub_if_data *sdata =
1481 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1483 ieee80211_recalc_smps(sdata);
1487 * Helper function to initialise an interface to a specific type.
1489 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1490 enum nl80211_iftype type)
1492 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1495 /* clear type-dependent union */
1496 memset(&sdata->u, 0, sizeof(sdata->u));
1498 /* and set some type-dependent values */
1499 sdata->vif.type = type;
1500 sdata->vif.p2p = false;
1501 sdata->wdev.iftype = type;
1503 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1504 sdata->control_port_no_encrypt = false;
1505 sdata->control_port_over_nl80211 = false;
1506 sdata->control_port_no_preauth = false;
1507 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1508 sdata->vif.bss_conf.idle = true;
1509 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1511 sdata->noack_map = 0;
1513 /* only monitor/p2p-device differ */
1515 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1516 sdata->dev->type = ARPHRD_ETHER;
1519 skb_queue_head_init(&sdata->skb_queue);
1520 INIT_WORK(&sdata->work, ieee80211_iface_work);
1521 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1522 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1523 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1524 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1527 case NL80211_IFTYPE_P2P_GO:
1528 type = NL80211_IFTYPE_AP;
1529 sdata->vif.type = type;
1530 sdata->vif.p2p = true;
1532 case NL80211_IFTYPE_AP:
1533 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1534 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1535 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1537 case NL80211_IFTYPE_P2P_CLIENT:
1538 type = NL80211_IFTYPE_STATION;
1539 sdata->vif.type = type;
1540 sdata->vif.p2p = true;
1542 case NL80211_IFTYPE_STATION:
1543 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1544 ieee80211_sta_setup_sdata(sdata);
1546 case NL80211_IFTYPE_OCB:
1547 sdata->vif.bss_conf.bssid = bssid_wildcard;
1548 ieee80211_ocb_setup_sdata(sdata);
1550 case NL80211_IFTYPE_ADHOC:
1551 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1552 ieee80211_ibss_setup_sdata(sdata);
1554 case NL80211_IFTYPE_MESH_POINT:
1555 if (ieee80211_vif_is_mesh(&sdata->vif))
1556 ieee80211_mesh_init_sdata(sdata);
1558 case NL80211_IFTYPE_MONITOR:
1559 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1560 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1561 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1562 MONITOR_FLAG_OTHER_BSS;
1564 case NL80211_IFTYPE_NAN:
1565 idr_init(&sdata->u.nan.function_inst_ids);
1566 spin_lock_init(&sdata->u.nan.func_lock);
1567 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1569 case NL80211_IFTYPE_AP_VLAN:
1570 case NL80211_IFTYPE_P2P_DEVICE:
1571 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1573 case NL80211_IFTYPE_UNSPECIFIED:
1574 case NL80211_IFTYPE_WDS:
1575 case NUM_NL80211_IFTYPES:
1580 ieee80211_debugfs_add_netdev(sdata);
1583 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1584 enum nl80211_iftype type)
1586 struct ieee80211_local *local = sdata->local;
1588 enum nl80211_iftype internal_type = type;
1593 if (!local->ops->change_interface)
1596 switch (sdata->vif.type) {
1597 case NL80211_IFTYPE_AP:
1598 case NL80211_IFTYPE_STATION:
1599 case NL80211_IFTYPE_ADHOC:
1600 case NL80211_IFTYPE_OCB:
1602 * Could maybe also all others here?
1603 * Just not sure how that interacts
1604 * with the RX/config path e.g. for
1613 case NL80211_IFTYPE_AP:
1614 case NL80211_IFTYPE_STATION:
1615 case NL80211_IFTYPE_ADHOC:
1616 case NL80211_IFTYPE_OCB:
1618 * Could probably support everything
1622 case NL80211_IFTYPE_P2P_CLIENT:
1624 internal_type = NL80211_IFTYPE_STATION;
1626 case NL80211_IFTYPE_P2P_GO:
1628 internal_type = NL80211_IFTYPE_AP;
1634 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1638 ieee80211_stop_vif_queues(local, sdata,
1639 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1642 ieee80211_do_stop(sdata, false);
1644 ieee80211_teardown_sdata(sdata);
1646 ieee80211_set_sdata_offload_flags(sdata);
1647 ret = drv_change_interface(local, sdata, internal_type, p2p);
1649 type = ieee80211_vif_type_p2p(&sdata->vif);
1652 * Ignore return value here, there's not much we can do since
1653 * the driver changed the interface type internally already.
1654 * The warnings will hopefully make driver authors fix it :-)
1656 ieee80211_check_queues(sdata, type);
1658 ieee80211_setup_sdata(sdata, type);
1659 ieee80211_set_vif_encap_ops(sdata);
1661 err = ieee80211_do_open(&sdata->wdev, false);
1662 WARN(err, "type change: do_open returned %d", err);
1664 ieee80211_wake_vif_queues(local, sdata,
1665 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1669 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1670 enum nl80211_iftype type)
1676 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1679 if (ieee80211_sdata_running(sdata)) {
1680 ret = ieee80211_runtime_change_iftype(sdata, type);
1684 /* Purge and reset type-dependent state. */
1685 ieee80211_teardown_sdata(sdata);
1686 ieee80211_setup_sdata(sdata, type);
1689 /* reset some values that shouldn't be kept across type changes */
1690 if (type == NL80211_IFTYPE_STATION)
1691 sdata->u.mgd.use_4addr = false;
1696 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1697 u8 *perm_addr, enum nl80211_iftype type)
1699 struct ieee80211_sub_if_data *sdata;
1700 u64 mask, start, addr, val, inc;
1702 u8 tmp_addr[ETH_ALEN];
1705 /* default ... something at least */
1706 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1708 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1709 local->hw.wiphy->n_addresses <= 1)
1712 mutex_lock(&local->iflist_mtx);
1715 case NL80211_IFTYPE_MONITOR:
1716 /* doesn't matter */
1718 case NL80211_IFTYPE_AP_VLAN:
1719 /* match up with an AP interface */
1720 list_for_each_entry(sdata, &local->interfaces, list) {
1721 if (sdata->vif.type != NL80211_IFTYPE_AP)
1723 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1726 /* keep default if no AP interface present */
1728 case NL80211_IFTYPE_P2P_CLIENT:
1729 case NL80211_IFTYPE_P2P_GO:
1730 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1731 list_for_each_entry(sdata, &local->interfaces, list) {
1732 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1734 if (!ieee80211_sdata_running(sdata))
1736 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1742 /* assign a new address if possible -- try n_addresses first */
1743 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1746 list_for_each_entry(sdata, &local->interfaces, list) {
1747 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1756 local->hw.wiphy->addresses[i].addr,
1762 /* try mask if available */
1763 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1766 m = local->hw.wiphy->addr_mask;
1767 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1768 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1769 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1771 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1772 /* not a contiguous mask ... not handled now! */
1773 pr_info("not contiguous\n");
1778 * Pick address of existing interface in case user changed
1779 * MAC address manually, default to perm_addr.
1781 m = local->hw.wiphy->perm_addr;
1782 list_for_each_entry(sdata, &local->interfaces, list) {
1783 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1785 m = sdata->vif.addr;
1788 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1789 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1790 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1792 inc = 1ULL<<__ffs64(mask);
1793 val = (start & mask);
1794 addr = (start & ~mask) | (val & mask);
1798 tmp_addr[5] = addr >> 0*8;
1799 tmp_addr[4] = addr >> 1*8;
1800 tmp_addr[3] = addr >> 2*8;
1801 tmp_addr[2] = addr >> 3*8;
1802 tmp_addr[1] = addr >> 4*8;
1803 tmp_addr[0] = addr >> 5*8;
1807 list_for_each_entry(sdata, &local->interfaces, list) {
1808 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1815 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1818 addr = (start & ~mask) | (val & mask);
1819 } while (addr != start);
1825 mutex_unlock(&local->iflist_mtx);
1828 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1829 unsigned char name_assign_type,
1830 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1831 struct vif_params *params)
1833 struct net_device *ndev = NULL;
1834 struct ieee80211_sub_if_data *sdata = NULL;
1835 struct txq_info *txqi;
1836 void (*if_setup)(struct net_device *dev);
1842 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1843 struct wireless_dev *wdev;
1845 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1849 wdev = &sdata->wdev;
1852 strlcpy(sdata->name, name, IFNAMSIZ);
1853 ieee80211_assign_perm_addr(local, wdev->address, type);
1854 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1856 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1860 if (local->ops->wake_tx_queue &&
1861 type != NL80211_IFTYPE_AP_VLAN &&
1862 (type != NL80211_IFTYPE_MONITOR ||
1863 (params->flags & MONITOR_FLAG_ACTIVE)))
1864 txq_size += sizeof(struct txq_info) +
1865 local->hw.txq_data_size;
1867 if (local->ops->wake_tx_queue) {
1868 if_setup = ieee80211_if_setup_no_queue;
1870 if_setup = ieee80211_if_setup;
1871 if (local->hw.queues >= IEEE80211_NUM_ACS)
1872 txqs = IEEE80211_NUM_ACS;
1875 ndev = alloc_netdev_mqs(size + txq_size,
1876 name, name_assign_type,
1881 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1882 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1884 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1886 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1887 if (!ndev->tstats) {
1892 ndev->needed_headroom = local->tx_headroom +
1893 4*6 /* four MAC addresses */
1894 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1896 + 8 /* rfc1042/bridge tunnel */
1897 - ETH_HLEN /* ethernet hard_header_len */
1898 + IEEE80211_ENCRYPT_HEADROOM;
1899 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1901 ret = dev_alloc_name(ndev, ndev->name);
1903 ieee80211_if_free(ndev);
1908 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1909 if (is_valid_ether_addr(params->macaddr))
1910 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1912 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1913 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1915 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1916 sdata = netdev_priv(ndev);
1917 ndev->ieee80211_ptr = &sdata->wdev;
1918 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1919 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1922 txqi = netdev_priv(ndev) + size;
1923 ieee80211_txq_init(sdata, NULL, txqi, 0);
1929 /* initialise type-independent data */
1930 sdata->wdev.wiphy = local->hw.wiphy;
1931 sdata->local = local;
1933 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1934 skb_queue_head_init(&sdata->fragments[i].skb_list);
1936 INIT_LIST_HEAD(&sdata->key_list);
1938 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1939 ieee80211_dfs_cac_timer_work);
1940 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1941 ieee80211_delayed_tailroom_dec);
1943 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1944 struct ieee80211_supported_band *sband;
1945 sband = local->hw.wiphy->bands[i];
1946 sdata->rc_rateidx_mask[i] =
1947 sband ? (1 << sband->n_bitrates) - 1 : 0;
1952 memcpy(sdata->rc_rateidx_mcs_mask[i],
1953 sband->ht_cap.mcs.rx_mask,
1954 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1956 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1957 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1958 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1960 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1961 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1962 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1963 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1967 ieee80211_set_default_queues(sdata);
1969 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1970 sdata->user_power_level = local->user_power_level;
1972 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1974 /* setup type-dependent data */
1975 ieee80211_setup_sdata(sdata, type);
1978 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1979 if (type == NL80211_IFTYPE_STATION)
1980 sdata->u.mgd.use_4addr = params->use_4addr;
1982 ndev->features |= local->hw.netdev_features;
1983 ndev->hw_features |= ndev->features &
1984 MAC80211_SUPPORTED_FEATURES_TX;
1986 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1988 /* MTU range: 256 - 2304 */
1989 ndev->min_mtu = 256;
1990 ndev->max_mtu = local->hw.max_mtu;
1992 ret = cfg80211_register_netdevice(ndev);
1999 mutex_lock(&local->iflist_mtx);
2000 list_add_tail_rcu(&sdata->list, &local->interfaces);
2001 mutex_unlock(&local->iflist_mtx);
2004 *new_wdev = &sdata->wdev;
2009 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2013 mutex_lock(&sdata->local->iflist_mtx);
2014 list_del_rcu(&sdata->list);
2015 mutex_unlock(&sdata->local->iflist_mtx);
2018 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2022 cfg80211_unregister_wdev(&sdata->wdev);
2025 ieee80211_teardown_sdata(sdata);
2030 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2032 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2034 ieee80211_do_stop(sdata, true);
2037 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2039 struct ieee80211_sub_if_data *sdata, *tmp;
2040 LIST_HEAD(unreg_list);
2041 LIST_HEAD(wdev_list);
2045 /* Before destroying the interfaces, make sure they're all stopped so
2046 * that the hardware is stopped. Otherwise, the driver might still be
2047 * iterating the interfaces during the shutdown, e.g. from a worker
2048 * or from RX processing or similar, and if it does so (using atomic
2049 * iteration) while we're manipulating the list, the iteration will
2052 * After this, the hardware should be stopped and the driver should
2053 * have stopped all of its activities, so that we can do RCU-unaware
2054 * manipulations of the interface list below.
2056 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2058 WARN(local->open_count, "%s: open count remains %d\n",
2059 wiphy_name(local->hw.wiphy), local->open_count);
2061 ieee80211_txq_teardown_flows(local);
2063 mutex_lock(&local->iflist_mtx);
2064 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2065 list_del(&sdata->list);
2068 unregister_netdevice_queue(sdata->dev, &unreg_list);
2070 list_add(&sdata->list, &wdev_list);
2072 mutex_unlock(&local->iflist_mtx);
2074 unregister_netdevice_many(&unreg_list);
2076 wiphy_lock(local->hw.wiphy);
2077 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2078 list_del(&sdata->list);
2079 cfg80211_unregister_wdev(&sdata->wdev);
2082 wiphy_unlock(local->hw.wiphy);
2085 static int netdev_notify(struct notifier_block *nb,
2086 unsigned long state, void *ptr)
2088 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2089 struct ieee80211_sub_if_data *sdata;
2091 if (state != NETDEV_CHANGENAME)
2094 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2097 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2100 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2101 memcpy(sdata->name, dev->name, IFNAMSIZ);
2102 ieee80211_debugfs_rename_netdev(sdata);
2107 static struct notifier_block mac80211_netdev_notifier = {
2108 .notifier_call = netdev_notify,
2111 int ieee80211_iface_init(void)
2113 return register_netdevice_notifier(&mac80211_netdev_notifier);
2116 void ieee80211_iface_exit(void)
2118 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2121 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2123 if (sdata->vif.type == NL80211_IFTYPE_AP)
2124 atomic_inc(&sdata->u.ap.num_mcast_sta);
2125 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2126 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2129 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2131 if (sdata->vif.type == NL80211_IFTYPE_AP)
2132 atomic_dec(&sdata->u.ap.num_mcast_sta);
2133 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2134 atomic_dec(&sdata->u.vlan.num_mcast_sta);