1	// SPDX-License-Identifier: GPL-2.0-only
2	/*
3	* Copyright 2002-2005, Instant802 Networks, Inc.
4	* Copyright 2005-2006, Devicescape Software, Inc.
5	* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6	* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7	* Copyright 2013-2014 Intel Mobile Communications GmbH
8	* Copyright (C) 2018-2024 Intel Corporation
9	*
10	* Transmit and frame generation functions.
11	*/
12
13	#include <linux/kernel.h>
14	#include <linux/slab.h>
15	#include <linux/skbuff.h>
16	#include <linux/if_vlan.h>
17	#include <linux/etherdevice.h>
18	#include <linux/bitmap.h>
19	#include <linux/rcupdate.h>
20	#include <linux/export.h>
21	#include <net/net_namespace.h>
22	#include <net/ieee80211_radiotap.h>
23	#include <net/cfg80211.h>
24	#include <net/mac80211.h>
25	#include <net/codel.h>
26	#include <net/codel_impl.h>
27	#include <asm/unaligned.h>
28	#include <net/fq_impl.h>
29	#include <net/gso.h>
30
31	#include "ieee80211_i.h"
32	#include "driver-ops.h"
33	#include "led.h"
34	#include "mesh.h"
35	#include "wep.h"
36	#include "wpa.h"
37	#include "wme.h"
38	#include "rate.h"
39
40	/* misc utils */
41
42	static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
43	struct sk_buff *skb, int group_addr,
44	int next_frag_len)
45	{
46	int rate, mrate, erp, dur, i;
47	struct ieee80211_rate *txrate;
48	struct ieee80211_local *local = tx->local;
49	struct ieee80211_supported_band *sband;
50	struct ieee80211_hdr *hdr;
51	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
52	struct ieee80211_chanctx_conf *chanctx_conf;
53	u32 rate_flags = 0;
54
55	/* assume HW handles this */
56	if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
57	return 0;
58
59	rcu_read_lock();
60	chanctx_conf = rcu_dereference(tx->sdata->vif.bss_conf.chanctx_conf);
61	if (chanctx_conf)
62	rate_flags = ieee80211_chandef_rate_flags(chandef: &chanctx_conf->def);
63	rcu_read_unlock();
64
65	/* uh huh? */
66	if (WARN_ON_ONCE(tx->rate.idx < 0))
67	return 0;
68
69	sband = local->hw.wiphy->bands[info->band];
70	txrate = &sband->bitrates[tx->rate.idx];
71
72	erp = txrate->flags & IEEE80211_RATE_ERP_G;
73
74	/* device is expected to do this */
75	if (sband->band == NL80211_BAND_S1GHZ)
76	return 0;
77
78	/*
79	* data and mgmt (except PS Poll):
80	* - during CFP: 32768
81	* - during contention period:
82	* if addr1 is group address: 0
83	* if more fragments = 0 and addr1 is individual address: time to
84	* transmit one ACK plus SIFS
85	* if more fragments = 1 and addr1 is individual address: time to
86	* transmit next fragment plus 2 x ACK plus 3 x SIFS
87	*
88	* IEEE 802.11, 9.6:
89	* - control response frame (CTS or ACK) shall be transmitted using the
90	* same rate as the immediately previous frame in the frame exchange
91	* sequence, if this rate belongs to the PHY mandatory rates, or else
92	* at the highest possible rate belonging to the PHY rates in the
93	* BSSBasicRateSet
94	*/
95	hdr = (struct ieee80211_hdr *)skb->data;
96	if (ieee80211_is_ctl(fc: hdr->frame_control)) {
97	/* TODO: These control frames are not currently sent by
98	* mac80211, but should they be implemented, this function
99	* needs to be updated to support duration field calculation.
100	*
101	* RTS: time needed to transmit pending data/mgmt frame plus
102	* one CTS frame plus one ACK frame plus 3 x SIFS
103	* CTS: duration of immediately previous RTS minus time
104	* required to transmit CTS and its SIFS
105	* ACK: 0 if immediately previous directed data/mgmt had
106	* more=0, with more=1 duration in ACK frame is duration
107	* from previous frame minus time needed to transmit ACK
108	* and its SIFS
109	* PS Poll: BIT(15) | BIT(14) | aid
110	*/
111	return 0;
112	}
113
114	/* data/mgmt */
115	if (0 /* FIX: data/mgmt during CFP */)
116	return cpu_to_le16(32768);
117
118	if (group_addr) /* Group address as the destination - no ACK */
119	return 0;
120
121	/* Individual destination address:
122	* IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
123	* CTS and ACK frames shall be transmitted using the highest rate in
124	* basic rate set that is less than or equal to the rate of the
125	* immediately previous frame and that is using the same modulation
126	* (CCK or OFDM). If no basic rate set matches with these requirements,
127	* the highest mandatory rate of the PHY that is less than or equal to
128	* the rate of the previous frame is used.
129	* Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
130	*/
131	rate = -1;
132	/* use lowest available if everything fails */
133	mrate = sband->bitrates[0].bitrate;
134	for (i = 0; i < sband->n_bitrates; i++) {
135	struct ieee80211_rate *r = &sband->bitrates[i];
136	u32 flag;
137
138	if (r->bitrate > txrate->bitrate)
139	break;
140
141	if ((rate_flags & r->flags) != rate_flags)
142	continue;
143
144	if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
145	rate = r->bitrate;
146
147	switch (sband->band) {
148	case NL80211_BAND_2GHZ:
149	case NL80211_BAND_LC:
150	if (tx->sdata->deflink.operating_11g_mode)
151	flag = IEEE80211_RATE_MANDATORY_G;
152	else
153	flag = IEEE80211_RATE_MANDATORY_B;
154	break;
155	case NL80211_BAND_5GHZ:
156	case NL80211_BAND_6GHZ:
157	flag = IEEE80211_RATE_MANDATORY_A;
158	break;
159	default:
160	flag = 0;
161	WARN_ON(1);
162	break;
163	}
164
165	if (r->flags & flag)
166	mrate = r->bitrate;
167	}
168	if (rate == -1) {
169	/* No matching basic rate found; use highest suitable mandatory
170	* PHY rate */
171	rate = mrate;
172	}
173
174	/* Don't calculate ACKs for QoS Frames with NoAck Policy set */
175	if (ieee80211_is_data_qos(fc: hdr->frame_control) &&
176	*(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
177	dur = 0;
178	else
179	/* Time needed to transmit ACK
180	* (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
181	* to closest integer */
182	dur = ieee80211_frame_duration(band: sband->band, len: 10, rate, erp,
183	short_preamble: tx->sdata->vif.bss_conf.use_short_preamble);
184
185	if (next_frag_len) {
186	/* Frame is fragmented: duration increases with time needed to
187	* transmit next fragment plus ACK and 2 x SIFS. */
188	dur *= 2; /* ACK + SIFS */
189	/* next fragment */
190	dur += ieee80211_frame_duration(band: sband->band, len: next_frag_len,
191	rate: txrate->bitrate, erp,
192	short_preamble: tx->sdata->vif.bss_conf.use_short_preamble);
193	}
194
195	return cpu_to_le16(dur);
196	}
197
198	/* tx handlers */
199	static ieee80211_tx_result debug_noinline
200	ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
201	{
202	struct ieee80211_local *local = tx->local;
203	struct ieee80211_if_managed *ifmgd;
204	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
205
206	/* driver doesn't support power save */
207	if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
208	return TX_CONTINUE;
209
210	/* hardware does dynamic power save */
211	if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
212	return TX_CONTINUE;
213
214	/* dynamic power save disabled */
215	if (local->hw.conf.dynamic_ps_timeout <= 0)
216	return TX_CONTINUE;
217
218	/* we are scanning, don't enable power save */
219	if (local->scanning)
220	return TX_CONTINUE;
221
222	if (!local->ps_sdata)
223	return TX_CONTINUE;
224
225	/* No point if we're going to suspend */
226	if (local->quiescing)
227	return TX_CONTINUE;
228
229	/* dynamic ps is supported only in managed mode */
230	if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
231	return TX_CONTINUE;
232
233	if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
234	return TX_CONTINUE;
235
236	ifmgd = &tx->sdata->u.mgd;
237
238	/*
239	* Don't wakeup from power save if u-apsd is enabled, voip ac has
240	* u-apsd enabled and the frame is in voip class. This effectively
241	* means that even if all access categories have u-apsd enabled, in
242	* practise u-apsd is only used with the voip ac. This is a
243	* workaround for the case when received voip class packets do not
244	* have correct qos tag for some reason, due the network or the
245	* peer application.
246	*
247	* Note: ifmgd->uapsd_queues access is racy here. If the value is
248	* changed via debugfs, user needs to reassociate manually to have
249	* everything in sync.
250	*/
251	if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
252	(ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
253	skb_get_queue_mapping(skb: tx->skb) == IEEE80211_AC_VO)
254	return TX_CONTINUE;
255
256	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
257	ieee80211_stop_queues_by_reason(hw: &local->hw,
258	queues: IEEE80211_MAX_QUEUE_MAP,
259	reason: IEEE80211_QUEUE_STOP_REASON_PS,
260	refcounted: false);
261	ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
262	wiphy_work_queue(wiphy: local->hw.wiphy,
263	work: &local->dynamic_ps_disable_work);
264	}
265
266	/* Don't restart the timer if we're not disassociated */
267	if (!ifmgd->associated)
268	return TX_CONTINUE;
269
270	mod_timer(timer: &local->dynamic_ps_timer, expires: jiffies +
271	msecs_to_jiffies(m: local->hw.conf.dynamic_ps_timeout));
272
273	return TX_CONTINUE;
274	}
275
276	static ieee80211_tx_result debug_noinline
277	ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
278	{
279
280	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
281	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
282	bool assoc = false;
283
284	if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
285	return TX_CONTINUE;
286
287	if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
288	test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
289	!ieee80211_is_probe_req(fc: hdr->frame_control) &&
290	!ieee80211_is_any_nullfunc(fc: hdr->frame_control))
291	/*
292	* When software scanning only nullfunc frames (to notify
293	* the sleep state to the AP) and probe requests (for the
294	* active scan) are allowed, all other frames should not be
295	* sent and we should not get here, but if we do
296	* nonetheless, drop them to avoid sending them
297	* off-channel. See the link below and
298	* ieee80211_start_scan() for more.
299	*
300	* http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
301	*/
302	return TX_DROP;
303
304	if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
305	return TX_CONTINUE;
306
307	if (tx->flags & IEEE80211_TX_PS_BUFFERED)
308	return TX_CONTINUE;
309
310	if (tx->sta)
311	assoc = test_sta_flag(sta: tx->sta, flag: WLAN_STA_ASSOC);
312
313	if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
314	if (unlikely(!assoc &&
315	ieee80211_is_data(hdr->frame_control))) {
316	#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
317	sdata_info(tx->sdata,
318	"dropped data frame to not associated station %pM\n",
319	hdr->addr1);
320	#endif
321	I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
322	return TX_DROP;
323	}
324	} else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
325	ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
326	/*
327	* No associated STAs - no need to send multicast
328	* frames.
329	*/
330	return TX_DROP;
331	}
332
333	return TX_CONTINUE;
334	}
335
336	/* This function is called whenever the AP is about to exceed the maximum limit
337	* of buffered frames for power saving STAs. This situation should not really
338	* happen often during normal operation, so dropping the oldest buffered packet
339	* from each queue should be OK to make some room for new frames. */
340	static void purge_old_ps_buffers(struct ieee80211_local *local)
341	{
342	int total = 0, purged = 0;
343	struct sk_buff *skb;
344	struct ieee80211_sub_if_data *sdata;
345	struct sta_info *sta;
346
347	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
348	struct ps_data *ps;
349
350	if (sdata->vif.type == NL80211_IFTYPE_AP)
351	ps = &sdata->u.ap.ps;
352	else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
353	ps = &sdata->u.mesh.ps;
354	else
355	continue;
356
357	skb = skb_dequeue(list: &ps->bc_buf);
358	if (skb) {
359	purged++;
360	ieee80211_free_txskb(hw: &local->hw, skb);
361	}
362	total += skb_queue_len(list_: &ps->bc_buf);
363	}
364
365	/*
366	* Drop one frame from each station from the lowest-priority
367	* AC that has frames at all.
368	*/
369	list_for_each_entry_rcu(sta, &local->sta_list, list) {
370	int ac;
371
372	for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
373	skb = skb_dequeue(list: &sta->ps_tx_buf[ac]);
374	total += skb_queue_len(list_: &sta->ps_tx_buf[ac]);
375	if (skb) {
376	purged++;
377	ieee80211_free_txskb(hw: &local->hw, skb);
378	break;
379	}
380	}
381	}
382
383	local->total_ps_buffered = total;
384	ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
385	}
386
387	static ieee80211_tx_result
388	ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
389	{
390	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
391	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
392	struct ps_data *ps;
393
394	/*
395	* broadcast/multicast frame
396	*
397	* If any of the associated/peer stations is in power save mode,
398	* the frame is buffered to be sent after DTIM beacon frame.
399	* This is done either by the hardware or us.
400	*/
401
402	/* powersaving STAs currently only in AP/VLAN/mesh mode */
403	if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
404	tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
405	if (!tx->sdata->bss)
406	return TX_CONTINUE;
407
408	ps = &tx->sdata->bss->ps;
409	} else if (ieee80211_vif_is_mesh(vif: &tx->sdata->vif)) {
410	ps = &tx->sdata->u.mesh.ps;
411	} else {
412	return TX_CONTINUE;
413	}
414
415
416	/* no buffering for ordered frames */
417	if (ieee80211_has_order(fc: hdr->frame_control))
418	return TX_CONTINUE;
419
420	if (ieee80211_is_probe_req(fc: hdr->frame_control))
421	return TX_CONTINUE;
422
423	if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
424	info->hw_queue = tx->sdata->vif.cab_queue;
425
426	/* no stations in PS mode and no buffered packets */
427	if (!atomic_read(v: &ps->num_sta_ps) && skb_queue_empty(list: &ps->bc_buf))
428	return TX_CONTINUE;
429
430	info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
431
432	/* device releases frame after DTIM beacon */
433	if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
434	return TX_CONTINUE;
435
436	/* buffered in mac80211 */
437	if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
438	purge_old_ps_buffers(local: tx->local);
439
440	if (skb_queue_len(list_: &ps->bc_buf) >= AP_MAX_BC_BUFFER) {
441	ps_dbg(tx->sdata,
442	"BC TX buffer full - dropping the oldest frame\n");
443	ieee80211_free_txskb(hw: &tx->local->hw, skb: skb_dequeue(list: &ps->bc_buf));
444	} else
445	tx->local->total_ps_buffered++;
446
447	skb_queue_tail(list: &ps->bc_buf, newsk: tx->skb);
448
449	return TX_QUEUED;
450	}
451
452	static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
453	struct sk_buff *skb)
454	{
455	if (!ieee80211_is_mgmt(fc))
456	return 0;
457
458	if (sta == NULL || !test_sta_flag(sta, flag: WLAN_STA_MFP))
459	return 0;
460
461	if (!ieee80211_is_robust_mgmt_frame(skb))
462	return 0;
463
464	return 1;
465	}
466
467	static ieee80211_tx_result
468	ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
469	{
470	struct sta_info *sta = tx->sta;
471	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
472	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
473	struct ieee80211_local *local = tx->local;
474
475	if (unlikely(!sta))
476	return TX_CONTINUE;
477
478	if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
479	test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
480	test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
481	!(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
482	int ac = skb_get_queue_mapping(skb: tx->skb);
483
484	if (ieee80211_is_mgmt(fc: hdr->frame_control) &&
485	!ieee80211_is_bufferable_mmpdu(skb: tx->skb)) {
486	info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
487	return TX_CONTINUE;
488	}
489
490	ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
491	sta->sta.addr, sta->sta.aid, ac);
492	if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
493	purge_old_ps_buffers(local: tx->local);
494
495	/* sync with ieee80211_sta_ps_deliver_wakeup */
496	spin_lock(lock: &sta->ps_lock);
497	/*
498	* STA woke up the meantime and all the frames on ps_tx_buf have
499	* been queued to pending queue. No reordering can happen, go
500	* ahead and Tx the packet.
501	*/
502	if (!test_sta_flag(sta, flag: WLAN_STA_PS_STA) &&
503	!test_sta_flag(sta, flag: WLAN_STA_PS_DRIVER) &&
504	!test_sta_flag(sta, flag: WLAN_STA_PS_DELIVER)) {
505	spin_unlock(lock: &sta->ps_lock);
506	return TX_CONTINUE;
507	}
508
509	if (skb_queue_len(list_: &sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
510	struct sk_buff *old = skb_dequeue(list: &sta->ps_tx_buf[ac]);
511	ps_dbg(tx->sdata,
512	"STA %pM TX buffer for AC %d full - dropping oldest frame\n",
513	sta->sta.addr, ac);
514	ieee80211_free_txskb(hw: &local->hw, skb: old);
515	} else
516	tx->local->total_ps_buffered++;
517
518	info->control.jiffies = jiffies;
519	info->control.vif = &tx->sdata->vif;
520	info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
521	info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
522	skb_queue_tail(list: &sta->ps_tx_buf[ac], newsk: tx->skb);
523	spin_unlock(lock: &sta->ps_lock);
524
525	if (!timer_pending(timer: &local->sta_cleanup))
526	mod_timer(timer: &local->sta_cleanup,
527	expires: round_jiffies(j: jiffies +
528	STA_INFO_CLEANUP_INTERVAL));
529
530	/*
531	* We queued up some frames, so the TIM bit might
532	* need to be set, recalculate it.
533	*/
534	sta_info_recalc_tim(sta);
535
536	return TX_QUEUED;
537	} else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
538	ps_dbg(tx->sdata,
539	"STA %pM in PS mode, but polling/in SP -> send frame\n",
540	sta->sta.addr);
541	}
542
543	return TX_CONTINUE;
544	}
545
546	static ieee80211_tx_result debug_noinline
547	ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
548	{
549	if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
550	return TX_CONTINUE;
551
552	if (tx->flags & IEEE80211_TX_UNICAST)
553	return ieee80211_tx_h_unicast_ps_buf(tx);
554	else
555	return ieee80211_tx_h_multicast_ps_buf(tx);
556	}
557
558	static ieee80211_tx_result debug_noinline
559	ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
560	{
561	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
562
563	if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
564	if (tx->sdata->control_port_no_encrypt)
565	info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
566	info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
567	info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
568	}
569
570	return TX_CONTINUE;
571	}
572
573	static struct ieee80211_key *
574	ieee80211_select_link_key(struct ieee80211_tx_data *tx)
575	{
576	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
577	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
578	struct ieee80211_link_data *link;
579	unsigned int link_id;
580
581	link_id = u32_get_bits(v: info->control.flags, field: IEEE80211_TX_CTRL_MLO_LINK);
582	if (link_id == IEEE80211_LINK_UNSPECIFIED) {
583	link = &tx->sdata->deflink;
584	} else {
585	link = rcu_dereference(tx->sdata->link[link_id]);
586	if (!link)
587	return NULL;
588	}
589
590	if (ieee80211_is_group_privacy_action(skb: tx->skb))
591	return rcu_dereference(link->default_multicast_key);
592	else if (ieee80211_is_mgmt(fc: hdr->frame_control) &&
593	is_multicast_ether_addr(addr: hdr->addr1) &&
594	ieee80211_is_robust_mgmt_frame(skb: tx->skb))
595	return rcu_dereference(link->default_mgmt_key);
596	else if (is_multicast_ether_addr(addr: hdr->addr1))
597	return rcu_dereference(link->default_multicast_key);
598
599	return NULL;
600	}
601
602	static ieee80211_tx_result debug_noinline
603	ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
604	{
605	struct ieee80211_key *key;
606	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
607	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
608
609	if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
610	tx->key = NULL;
611	return TX_CONTINUE;
612	}
613
614	if (tx->sta &&
615	(key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
616	tx->key = key;
617	else if ((key = ieee80211_select_link_key(tx)))
618	tx->key = key;
619	else if (!is_multicast_ether_addr(addr: hdr->addr1) &&
620	(key = rcu_dereference(tx->sdata->default_unicast_key)))
621	tx->key = key;
622	else
623	tx->key = NULL;
624
625	if (tx->key) {
626	bool skip_hw = false;
627
628	/* TODO: add threshold stuff again */
629
630	switch (tx->key->conf.cipher) {
631	case WLAN_CIPHER_SUITE_WEP40:
632	case WLAN_CIPHER_SUITE_WEP104:
633	case WLAN_CIPHER_SUITE_TKIP:
634	if (!ieee80211_is_data_present(fc: hdr->frame_control))
635	tx->key = NULL;
636	break;
637	case WLAN_CIPHER_SUITE_CCMP:
638	case WLAN_CIPHER_SUITE_CCMP_256:
639	case WLAN_CIPHER_SUITE_GCMP:
640	case WLAN_CIPHER_SUITE_GCMP_256:
641	if (!ieee80211_is_data_present(fc: hdr->frame_control) &&
642	!ieee80211_use_mfp(fc: hdr->frame_control, sta: tx->sta,
643	skb: tx->skb) &&
644	!ieee80211_is_group_privacy_action(skb: tx->skb))
645	tx->key = NULL;
646	else
647	skip_hw = (tx->key->conf.flags &
648	IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
649	ieee80211_is_mgmt(fc: hdr->frame_control);
650	break;
651	case WLAN_CIPHER_SUITE_AES_CMAC:
652	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
653	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
654	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
655	if (!ieee80211_is_mgmt(fc: hdr->frame_control))
656	tx->key = NULL;
657	break;
658	}
659
660	if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
661	!ieee80211_is_deauth(hdr->frame_control)) &&
662	tx->skb->protocol != tx->sdata->control_port_protocol)
663	return TX_DROP;
664
665	if (!skip_hw && tx->key &&
666	tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
667	info->control.hw_key = &tx->key->conf;
668	} else if (ieee80211_is_data_present(fc: hdr->frame_control) && tx->sta &&
669	test_sta_flag(sta: tx->sta, flag: WLAN_STA_USES_ENCRYPTION)) {
670	return TX_DROP;
671	}
672
673	return TX_CONTINUE;
674	}
675
676	static ieee80211_tx_result debug_noinline
677	ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
678	{
679	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
680	struct ieee80211_hdr *hdr = (void *)tx->skb->data;
681	struct ieee80211_supported_band *sband;
682	u32 len;
683	struct ieee80211_tx_rate_control txrc;
684	struct ieee80211_sta_rates *ratetbl = NULL;
685	bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
686	bool assoc = false;
687
688	memset(&txrc, 0, sizeof(txrc));
689
690	sband = tx->local->hw.wiphy->bands[info->band];
691
692	len = min_t(u32, tx->skb->len + FCS_LEN,
693	tx->local->hw.wiphy->frag_threshold);
694
695	/* set up the tx rate control struct we give the RC algo */
696	txrc.hw = &tx->local->hw;
697	txrc.sband = sband;
698	txrc.bss_conf = &tx->sdata->vif.bss_conf;
699	txrc.skb = tx->skb;
700	txrc.reported_rate.idx = -1;
701	txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
702
703	if (tx->sdata->rc_has_mcs_mask[info->band])
704	txrc.rate_idx_mcs_mask =
705	tx->sdata->rc_rateidx_mcs_mask[info->band];
706
707	txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
708	tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
709	tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
710	tx->sdata->vif.type == NL80211_IFTYPE_OCB);
711
712	/* set up RTS protection if desired */
713	if (len > tx->local->hw.wiphy->rts_threshold) {
714	txrc.rts = true;
715	}
716
717	info->control.use_rts = txrc.rts;
718	info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
719
720	/*
721	* Use short preamble if the BSS can handle it, but not for
722	* management frames unless we know the receiver can handle
723	* that -- the management frame might be to a station that
724	* just wants a probe response.
725	*/
726	if (tx->sdata->vif.bss_conf.use_short_preamble &&
727	(ieee80211_is_tx_data(skb: tx->skb) ||
728	(tx->sta && test_sta_flag(sta: tx->sta, flag: WLAN_STA_SHORT_PREAMBLE))))
729	txrc.short_preamble = true;
730
731	info->control.short_preamble = txrc.short_preamble;
732
733	/* don't ask rate control when rate already injected via radiotap */
734	if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
735	return TX_CONTINUE;
736
737	if (tx->sta)
738	assoc = test_sta_flag(sta: tx->sta, flag: WLAN_STA_ASSOC);
739
740	/*
741	* Lets not bother rate control if we're associated and cannot
742	* talk to the sta. This should not happen.
743	*/
744	if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
745	!rate_usable_index_exists(sband, &tx->sta->sta),
746	"%s: Dropped data frame as no usable bitrate found while "
747	"scanning and associated. Target station: "
748	"%pM on %d GHz band\n",
749	tx->sdata->name,
750	encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
751	info->band ? 5 : 2))
752	return TX_DROP;
753
754	/*
755	* If we're associated with the sta at this point we know we can at
756	* least send the frame at the lowest bit rate.
757	*/
758	rate_control_get_rate(sdata: tx->sdata, sta: tx->sta, txrc: &txrc);
759
760	if (tx->sta && !info->control.skip_table)
761	ratetbl = rcu_dereference(tx->sta->sta.rates);
762
763	if (unlikely(info->control.rates[0].idx < 0)) {
764	if (ratetbl) {
765	struct ieee80211_tx_rate rate = {
766	.idx = ratetbl->rate[0].idx,
767	.flags = ratetbl->rate[0].flags,
768	.count = ratetbl->rate[0].count
769	};
770
771	if (ratetbl->rate[0].idx < 0)
772	return TX_DROP;
773
774	tx->rate = rate;
775	} else {
776	return TX_DROP;
777	}
778	} else {
779	tx->rate = info->control.rates[0];
780	}
781
782	if (txrc.reported_rate.idx < 0) {
783	txrc.reported_rate = tx->rate;
784	if (tx->sta && ieee80211_is_tx_data(skb: tx->skb))
785	tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
786	} else if (tx->sta)
787	tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
788
789	if (ratetbl)
790	return TX_CONTINUE;
791
792	if (unlikely(!info->control.rates[0].count))
793	info->control.rates[0].count = 1;
794
795	if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
796	(info->flags & IEEE80211_TX_CTL_NO_ACK)))
797	info->control.rates[0].count = 1;
798
799	return TX_CONTINUE;
800	}
801
802	static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
803	{
804	u16 *seq = &sta->tid_seq[tid];
805	__le16 ret = cpu_to_le16(*seq);
806
807	/* Increase the sequence number. */
808	*seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
809
810	return ret;
811	}
812
813	static ieee80211_tx_result debug_noinline
814	ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
815	{
816	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
817	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
818	int tid;
819
820	/*
821	* Packet injection may want to control the sequence
822	* number, if we have no matching interface then we
823	* neither assign one ourselves nor ask the driver to.
824	*/
825	if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
826	return TX_CONTINUE;
827
828	if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
829	return TX_CONTINUE;
830
831	if (ieee80211_hdrlen(fc: hdr->frame_control) < 24)
832	return TX_CONTINUE;
833
834	if (ieee80211_is_qos_nullfunc(fc: hdr->frame_control))
835	return TX_CONTINUE;
836
837	if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
838	return TX_CONTINUE;
839
840	/* SNS11 from 802.11be 10.3.2.14 */
841	if (unlikely(is_multicast_ether_addr(hdr->addr1) &&
842	ieee80211_vif_is_mld(info->control.vif) &&
843	info->control.vif->type == NL80211_IFTYPE_AP)) {
844	if (info->control.flags & IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX)
845	tx->sdata->mld_mcast_seq += 0x10;
846	hdr->seq_ctrl = cpu_to_le16(tx->sdata->mld_mcast_seq);
847	return TX_CONTINUE;
848	}
849
850	/*
851	* Anything but QoS data that has a sequence number field
852	* (is long enough) gets a sequence number from the global
853	* counter. QoS data frames with a multicast destination
854	* also use the global counter (802.11-2012 9.3.2.10).
855	*/
856	if (!ieee80211_is_data_qos(fc: hdr->frame_control) ||
857	is_multicast_ether_addr(addr: hdr->addr1)) {
858	/* driver should assign sequence number */
859	info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
860	/* for pure STA mode without beacons, we can do it */
861	hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
862	tx->sdata->sequence_number += 0x10;
863	if (tx->sta)
864	tx->sta->deflink.tx_stats.msdu[IEEE80211_NUM_TIDS]++;
865	return TX_CONTINUE;
866	}
867
868	/*
869	* This should be true for injected/management frames only, for
870	* management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
871	* above since they are not QoS-data frames.
872	*/
873	if (!tx->sta)
874	return TX_CONTINUE;
875
876	/* include per-STA, per-TID sequence counter */
877	tid = ieee80211_get_tid(hdr);
878	tx->sta->deflink.tx_stats.msdu[tid]++;
879
880	hdr->seq_ctrl = ieee80211_tx_next_seq(sta: tx->sta, tid);
881
882	return TX_CONTINUE;
883	}
884
885	static int ieee80211_fragment(struct ieee80211_tx_data *tx,
886	struct sk_buff *skb, int hdrlen,
887	int frag_threshold)
888	{
889	struct ieee80211_local *local = tx->local;
890	struct ieee80211_tx_info *info;
891	struct sk_buff *tmp;
892	int per_fragm = frag_threshold - hdrlen - FCS_LEN;
893	int pos = hdrlen + per_fragm;
894	int rem = skb->len - hdrlen - per_fragm;
895
896	if (WARN_ON(rem < 0))
897	return -EINVAL;
898
899	/* first fragment was already added to queue by caller */
900
901	while (rem) {
902	int fraglen = per_fragm;
903
904	if (fraglen > rem)
905	fraglen = rem;
906	rem -= fraglen;
907	tmp = dev_alloc_skb(length: local->tx_headroom +
908	frag_threshold +
909	IEEE80211_ENCRYPT_HEADROOM +
910	IEEE80211_ENCRYPT_TAILROOM);
911	if (!tmp)
912	return -ENOMEM;
913
914	__skb_queue_tail(list: &tx->skbs, newsk: tmp);
915
916	skb_reserve(skb: tmp,
917	len: local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM);
918
919	/* copy control information */
920	memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
921
922	info = IEEE80211_SKB_CB(skb: tmp);
923	info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
924	IEEE80211_TX_CTL_FIRST_FRAGMENT);
925
926	if (rem)
927	info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
928
929	skb_copy_queue_mapping(to: tmp, from: skb);
930	tmp->priority = skb->priority;
931	tmp->dev = skb->dev;
932
933	/* copy header and data */
934	skb_put_data(skb: tmp, data: skb->data, len: hdrlen);
935	skb_put_data(skb: tmp, data: skb->data + pos, len: fraglen);
936
937	pos += fraglen;
938	}
939
940	/* adjust first fragment's length */
941	skb_trim(skb, len: hdrlen + per_fragm);
942	return 0;
943	}
944
945	static ieee80211_tx_result debug_noinline
946	ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
947	{
948	struct sk_buff *skb = tx->skb;
949	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
950	struct ieee80211_hdr *hdr = (void *)skb->data;
951	int frag_threshold = tx->local->hw.wiphy->frag_threshold;
952	int hdrlen;
953	int fragnum;
954
955	/* no matter what happens, tx->skb moves to tx->skbs */
956	__skb_queue_tail(list: &tx->skbs, newsk: skb);
957	tx->skb = NULL;
958
959	if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
960	return TX_CONTINUE;
961
962	if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
963	return TX_CONTINUE;
964
965	/*
966	* Warn when submitting a fragmented A-MPDU frame and drop it.
967	* This scenario is handled in ieee80211_tx_prepare but extra
968	* caution taken here as fragmented ampdu may cause Tx stop.
969	*/
970	if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
971	return TX_DROP;
972
973	hdrlen = ieee80211_hdrlen(fc: hdr->frame_control);
974
975	/* internal error, why isn't DONTFRAG set? */
976	if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
977	return TX_DROP;
978
979	/*
980	* Now fragment the frame. This will allocate all the fragments and
981	* chain them (using skb as the first fragment) to skb->next.
982	* During transmission, we will remove the successfully transmitted
983	* fragments from this list. When the low-level driver rejects one
984	* of the fragments then we will simply pretend to accept the skb
985	* but store it away as pending.
986	*/
987	if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
988	return TX_DROP;
989
990	/* update duration/seq/flags of fragments */
991	fragnum = 0;
992
993	skb_queue_walk(&tx->skbs, skb) {
994	const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
995
996	hdr = (void *)skb->data;
997	info = IEEE80211_SKB_CB(skb);
998
999	if (!skb_queue_is_last(list: &tx->skbs, skb)) {
1000	hdr->frame_control |= morefrags;
1001	/*
1002	* No multi-rate retries for fragmented frames, that
1003	* would completely throw off the NAV at other STAs.
1004	*/
1005	info->control.rates[1].idx = -1;
1006	info->control.rates[2].idx = -1;
1007	info->control.rates[3].idx = -1;
1008	BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
1009	info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
1010	} else {
1011	hdr->frame_control &= ~morefrags;
1012	}
1013	hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
1014	fragnum++;
1015	}
1016
1017	return TX_CONTINUE;
1018	}
1019
1020	static ieee80211_tx_result debug_noinline
1021	ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1022	{
1023	struct sk_buff *skb;
1024	int ac = -1;
1025
1026	if (!tx->sta)
1027	return TX_CONTINUE;
1028
1029	skb_queue_walk(&tx->skbs, skb) {
1030	ac = skb_get_queue_mapping(skb);
1031	tx->sta->deflink.tx_stats.bytes[ac] += skb->len;
1032	}
1033	if (ac >= 0)
1034	tx->sta->deflink.tx_stats.packets[ac]++;
1035
1036	return TX_CONTINUE;
1037	}
1038
1039	static ieee80211_tx_result debug_noinline
1040	ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1041	{
1042	if (!tx->key)
1043	return TX_CONTINUE;
1044
1045	switch (tx->key->conf.cipher) {
1046	case WLAN_CIPHER_SUITE_WEP40:
1047	case WLAN_CIPHER_SUITE_WEP104:
1048	return ieee80211_crypto_wep_encrypt(tx);
1049	case WLAN_CIPHER_SUITE_TKIP:
1050	return ieee80211_crypto_tkip_encrypt(tx);
1051	case WLAN_CIPHER_SUITE_CCMP:
1052	return ieee80211_crypto_ccmp_encrypt(
1053	tx, IEEE80211_CCMP_MIC_LEN);
1054	case WLAN_CIPHER_SUITE_CCMP_256:
1055	return ieee80211_crypto_ccmp_encrypt(
1056	tx, IEEE80211_CCMP_256_MIC_LEN);
1057	case WLAN_CIPHER_SUITE_AES_CMAC:
1058	return ieee80211_crypto_aes_cmac_encrypt(tx);
1059	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1060	return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1061	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1062	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1063	return ieee80211_crypto_aes_gmac_encrypt(tx);
1064	case WLAN_CIPHER_SUITE_GCMP:
1065	case WLAN_CIPHER_SUITE_GCMP_256:
1066	return ieee80211_crypto_gcmp_encrypt(tx);
1067	}
1068
1069	return TX_DROP;
1070	}
1071
1072	static ieee80211_tx_result debug_noinline
1073	ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1074	{
1075	struct sk_buff *skb;
1076	struct ieee80211_hdr *hdr;
1077	int next_len;
1078	bool group_addr;
1079
1080	skb_queue_walk(&tx->skbs, skb) {
1081	hdr = (void *) skb->data;
1082	if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1083	break; /* must not overwrite AID */
1084	if (!skb_queue_is_last(list: &tx->skbs, skb)) {
1085	struct sk_buff *next = skb_queue_next(list: &tx->skbs, skb);
1086	next_len = next->len;
1087	} else
1088	next_len = 0;
1089	group_addr = is_multicast_ether_addr(addr: hdr->addr1);
1090
1091	hdr->duration_id =
1092	ieee80211_duration(tx, skb, group_addr, next_frag_len: next_len);
1093	}
1094
1095	return TX_CONTINUE;
1096	}
1097
1098	/* actual transmit path */
1099
1100	static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1101	struct sk_buff *skb,
1102	struct ieee80211_tx_info *info,
1103	struct tid_ampdu_tx *tid_tx,
1104	int tid)
1105	{
1106	bool queued = false;
1107	bool reset_agg_timer = false;
1108	struct sk_buff *purge_skb = NULL;
1109
1110	if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1111	reset_agg_timer = true;
1112	} else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1113	/*
1114	* nothing -- this aggregation session is being started
1115	* but that might still fail with the driver
1116	*/
1117	} else if (!tx->sta->sta.txq[tid]) {
1118	spin_lock(lock: &tx->sta->lock);
1119	/*
1120	* Need to re-check now, because we may get here
1121	*
1122	* 1) in the window during which the setup is actually
1123	* already done, but not marked yet because not all
1124	* packets are spliced over to the driver pending
1125	* queue yet -- if this happened we acquire the lock
1126	* either before or after the splice happens, but
1127	* need to recheck which of these cases happened.
1128	*
1129	* 2) during session teardown, if the OPERATIONAL bit
1130	* was cleared due to the teardown but the pointer
1131	* hasn't been assigned NULL yet (or we loaded it
1132	* before it was assigned) -- in this case it may
1133	* now be NULL which means we should just let the
1134	* packet pass through because splicing the frames
1135	* back is already done.
1136	*/
1137	tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1138
1139	if (!tid_tx) {
1140	/* do nothing, let packet pass through */
1141	} else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1142	reset_agg_timer = true;
1143	} else {
1144	queued = true;
1145	if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1146	clear_sta_flag(sta: tx->sta, flag: WLAN_STA_SP);
1147	ps_dbg(tx->sta->sdata,
1148	"STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1149	tx->sta->sta.addr, tx->sta->sta.aid);
1150	}
1151	info->control.vif = &tx->sdata->vif;
1152	info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1153	info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1154	__skb_queue_tail(list: &tid_tx->pending, newsk: skb);
1155	if (skb_queue_len(list_: &tid_tx->pending) > STA_MAX_TX_BUFFER)
1156	purge_skb = __skb_dequeue(list: &tid_tx->pending);
1157	}
1158	spin_unlock(lock: &tx->sta->lock);
1159
1160	if (purge_skb)
1161	ieee80211_free_txskb(hw: &tx->local->hw, skb: purge_skb);
1162	}
1163
1164	/* reset session timer */
1165	if (reset_agg_timer)
1166	tid_tx->last_tx = jiffies;
1167
1168	return queued;
1169	}
1170
1171	void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
1172	struct sta_info *sta, struct sk_buff *skb)
1173	{
1174	struct rate_control_ref *ref = sdata->local->rate_ctrl;
1175	u16 tid;
1176
1177	if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
1178	return;
1179
1180	if (!sta || !sta->sta.deflink.ht_cap.ht_supported ||
1181	!sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
1182	skb->protocol == sdata->control_port_protocol)
1183	return;
1184
1185	tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1186	if (likely(sta->ampdu_mlme.tid_tx[tid]))
1187	return;
1188
1189	ieee80211_start_tx_ba_session(sta: &sta->sta, tid, timeout: 0);
1190	}
1191
1192	/*
1193	* initialises @tx
1194	* pass %NULL for the station if unknown, a valid pointer if known
1195	* or an ERR_PTR() if the station is known not to exist
1196	*/
1197	static ieee80211_tx_result
1198	ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1199	struct ieee80211_tx_data *tx,
1200	struct sta_info *sta, struct sk_buff *skb)
1201	{
1202	struct ieee80211_local *local = sdata->local;
1203	struct ieee80211_hdr *hdr;
1204	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1205	bool aggr_check = false;
1206	int tid;
1207
1208	memset(tx, 0, sizeof(*tx));
1209	tx->skb = skb;
1210	tx->local = local;
1211	tx->sdata = sdata;
1212	__skb_queue_head_init(list: &tx->skbs);
1213
1214	/*
1215	* If this flag is set to true anywhere, and we get here,
1216	* we are doing the needed processing, so remove the flag
1217	* now.
1218	*/
1219	info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1220
1221	hdr = (struct ieee80211_hdr *) skb->data;
1222
1223	if (likely(sta)) {
1224	if (!IS_ERR(ptr: sta))
1225	tx->sta = sta;
1226	} else {
1227	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1228	tx->sta = rcu_dereference(sdata->u.vlan.sta);
1229	if (!tx->sta && sdata->wdev.use_4addr)
1230	return TX_DROP;
1231	} else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
1232	tx->sta = sta_info_get_bss(sdata, addr: hdr->addr1);
1233	}
1234	if (!tx->sta && !is_multicast_ether_addr(addr: hdr->addr1)) {
1235	tx->sta = sta_info_get(sdata, addr: hdr->addr1);
1236	aggr_check = true;
1237	}
1238	}
1239
1240	if (tx->sta && ieee80211_is_data_qos(fc: hdr->frame_control) &&
1241	!ieee80211_is_qos_nullfunc(fc: hdr->frame_control) &&
1242	ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1243	!ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1244	struct tid_ampdu_tx *tid_tx;
1245
1246	tid = ieee80211_get_tid(hdr);
1247	tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1248	if (!tid_tx && aggr_check) {
1249	ieee80211_aggr_check(sdata, sta: tx->sta, skb);
1250	tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1251	}
1252
1253	if (tid_tx) {
1254	bool queued;
1255
1256	queued = ieee80211_tx_prep_agg(tx, skb, info,
1257	tid_tx, tid);
1258
1259	if (unlikely(queued))
1260	return TX_QUEUED;
1261	}
1262	}
1263
1264	if (is_multicast_ether_addr(addr: hdr->addr1)) {
1265	tx->flags &= ~IEEE80211_TX_UNICAST;
1266	info->flags |= IEEE80211_TX_CTL_NO_ACK;
1267	} else
1268	tx->flags |= IEEE80211_TX_UNICAST;
1269
1270	if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1271	if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1272	skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1273	info->flags & IEEE80211_TX_CTL_AMPDU)
1274	info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1275	}
1276
1277	if (!tx->sta)
1278	info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1279	else if (test_and_clear_sta_flag(sta: tx->sta, flag: WLAN_STA_CLEAR_PS_FILT)) {
1280	info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1281	ieee80211_check_fast_xmit(sta: tx->sta);
1282	}
1283
1284	info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1285
1286	return TX_CONTINUE;
1287	}
1288
1289	static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1290	struct ieee80211_vif *vif,
1291	struct sta_info *sta,
1292	struct sk_buff *skb)
1293	{
1294	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1295	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1296	struct ieee80211_txq *txq = NULL;
1297
1298	if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1299	(info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1300	return NULL;
1301
1302	if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1303	unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1304	if ((!ieee80211_is_mgmt(fc: hdr->frame_control) ||
1305	ieee80211_is_bufferable_mmpdu(skb) ||
1306	vif->type == NL80211_IFTYPE_STATION) &&
1307	sta && sta->uploaded) {
1308	/*
1309	* This will be NULL if the driver didn't set the
1310	* opt-in hardware flag.
1311	*/
1312	txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1313	}
1314	} else if (sta) {
1315	u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1316
1317	if (!sta->uploaded)
1318	return NULL;
1319
1320	txq = sta->sta.txq[tid];
1321	} else {
1322	txq = vif->txq;
1323	}
1324
1325	if (!txq)
1326	return NULL;
1327
1328	return to_txq_info(txq);
1329	}
1330
1331	static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1332	{
1333	struct sk_buff *next;
1334	codel_time_t now = codel_get_time();
1335
1336	skb_list_walk_safe(skb, skb, next)
1337	IEEE80211_SKB_CB(skb)->control.enqueue_time = now;
1338	}
1339
1340	static u32 codel_skb_len_func(const struct sk_buff *skb)
1341	{
1342	return skb->len;
1343	}
1344
1345	static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1346	{
1347	const struct ieee80211_tx_info *info;
1348
1349	info = (const struct ieee80211_tx_info *)skb->cb;
1350	return info->control.enqueue_time;
1351	}
1352
1353	static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1354	void *ctx)
1355	{
1356	struct ieee80211_local *local;
1357	struct txq_info *txqi;
1358	struct fq *fq;
1359	struct fq_flow *flow;
1360
1361	txqi = ctx;
1362	local = vif_to_sdata(p: txqi->txq.vif)->local;
1363	fq = &local->fq;
1364
1365	if (cvars == &txqi->def_cvars)
1366	flow = &txqi->tin.default_flow;
1367	else
1368	flow = &fq->flows[cvars - local->cvars];
1369
1370	return fq_flow_dequeue(fq, flow);
1371	}
1372
1373	static void codel_drop_func(struct sk_buff *skb,
1374	void *ctx)
1375	{
1376	struct ieee80211_local *local;
1377	struct ieee80211_hw *hw;
1378	struct txq_info *txqi;
1379
1380	txqi = ctx;
1381	local = vif_to_sdata(p: txqi->txq.vif)->local;
1382	hw = &local->hw;
1383
1384	ieee80211_free_txskb(hw, skb);
1385	}
1386
1387	static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1388	struct fq_tin *tin,
1389	struct fq_flow *flow)
1390	{
1391	struct ieee80211_local *local;
1392	struct txq_info *txqi;
1393	struct codel_vars *cvars;
1394	struct codel_params *cparams;
1395	struct codel_stats *cstats;
1396
1397	local = container_of(fq, struct ieee80211_local, fq);
1398	txqi = container_of(tin, struct txq_info, tin);
1399	cstats = &txqi->cstats;
1400
1401	if (txqi->txq.sta) {
1402	struct sta_info *sta = container_of(txqi->txq.sta,
1403	struct sta_info, sta);
1404	cparams = &sta->cparams;
1405	} else {
1406	cparams = &local->cparams;
1407	}
1408
1409	if (flow == &tin->default_flow)
1410	cvars = &txqi->def_cvars;
1411	else
1412	cvars = &local->cvars[flow - fq->flows];
1413
1414	return codel_dequeue(ctx: txqi,
1415	backlog: &flow->backlog,
1416	params: cparams,
1417	vars: cvars,
1418	stats: cstats,
1419	skb_len_func: codel_skb_len_func,
1420	skb_time_func: codel_skb_time_func,
1421	drop_func: codel_drop_func,
1422	dequeue_func: codel_dequeue_func);
1423	}
1424
1425	static void fq_skb_free_func(struct fq *fq,
1426	struct fq_tin *tin,
1427	struct fq_flow *flow,
1428	struct sk_buff *skb)
1429	{
1430	struct ieee80211_local *local;
1431
1432	local = container_of(fq, struct ieee80211_local, fq);
1433	ieee80211_free_txskb(hw: &local->hw, skb);
1434	}
1435
1436	static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1437	struct txq_info *txqi,
1438	struct sk_buff *skb)
1439	{
1440	struct fq *fq = &local->fq;
1441	struct fq_tin *tin = &txqi->tin;
1442	u32 flow_idx = fq_flow_idx(fq, skb);
1443
1444	ieee80211_set_skb_enqueue_time(skb);
1445
1446	spin_lock_bh(lock: &fq->lock);
1447	/*
1448	* For management frames, don't really apply codel etc.,
1449	* we don't want to apply any shaping or anything we just
1450	* want to simplify the driver API by having them on the
1451	* txqi.
1452	*/
1453	if (unlikely(txqi->txq.tid == IEEE80211_NUM_TIDS)) {
1454	IEEE80211_SKB_CB(skb)->control.flags |=
1455	IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1456	__skb_queue_tail(list: &txqi->frags, newsk: skb);
1457	} else {
1458	fq_tin_enqueue(fq, tin, idx: flow_idx, skb,
1459	free_func: fq_skb_free_func);
1460	}
1461	spin_unlock_bh(lock: &fq->lock);
1462	}
1463
1464	static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1465	struct fq_flow *flow, struct sk_buff *skb,
1466	void *data)
1467	{
1468	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1469
1470	return info->control.vif == data;
1471	}
1472
1473	void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1474	struct ieee80211_sub_if_data *sdata)
1475	{
1476	struct fq *fq = &local->fq;
1477	struct txq_info *txqi;
1478	struct fq_tin *tin;
1479	struct ieee80211_sub_if_data *ap;
1480
1481	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1482	return;
1483
1484	ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1485
1486	if (!ap->vif.txq)
1487	return;
1488
1489	txqi = to_txq_info(txq: ap->vif.txq);
1490	tin = &txqi->tin;
1491
1492	spin_lock_bh(lock: &fq->lock);
1493	fq_tin_filter(fq, tin, filter_func: fq_vlan_filter_func, filter_data: &sdata->vif,
1494	free_func: fq_skb_free_func);
1495	spin_unlock_bh(lock: &fq->lock);
1496	}
1497
1498	void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1499	struct sta_info *sta,
1500	struct txq_info *txqi, int tid)
1501	{
1502	fq_tin_init(tin: &txqi->tin);
1503	codel_vars_init(vars: &txqi->def_cvars);
1504	codel_stats_init(stats: &txqi->cstats);
1505	__skb_queue_head_init(list: &txqi->frags);
1506	INIT_LIST_HEAD(list: &txqi->schedule_order);
1507
1508	txqi->txq.vif = &sdata->vif;
1509
1510	if (!sta) {
1511	sdata->vif.txq = &txqi->txq;
1512	txqi->txq.tid = 0;
1513	txqi->txq.ac = IEEE80211_AC_BE;
1514
1515	return;
1516	}
1517
1518	if (tid == IEEE80211_NUM_TIDS) {
1519	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1520	/* Drivers need to opt in to the management MPDU TXQ */
1521	if (!ieee80211_hw_check(&sdata->local->hw,
1522	STA_MMPDU_TXQ))
1523	return;
1524	} else if (!ieee80211_hw_check(&sdata->local->hw,
1525	BUFF_MMPDU_TXQ)) {
1526	/* Drivers need to opt in to the bufferable MMPDU TXQ */
1527	return;
1528	}
1529	txqi->txq.ac = IEEE80211_AC_VO;
1530	} else {
1531	txqi->txq.ac = ieee80211_ac_from_tid(tid);
1532	}
1533
1534	txqi->txq.sta = &sta->sta;
1535	txqi->txq.tid = tid;
1536	sta->sta.txq[tid] = &txqi->txq;
1537	}
1538
1539	void ieee80211_txq_purge(struct ieee80211_local *local,
1540	struct txq_info *txqi)
1541	{
1542	struct fq *fq = &local->fq;
1543	struct fq_tin *tin = &txqi->tin;
1544
1545	spin_lock_bh(lock: &fq->lock);
1546	fq_tin_reset(fq, tin, free_func: fq_skb_free_func);
1547	ieee80211_purge_tx_queue(hw: &local->hw, skbs: &txqi->frags);
1548	spin_unlock_bh(lock: &fq->lock);
1549
1550	spin_lock_bh(lock: &local->active_txq_lock[txqi->txq.ac]);
1551	list_del_init(entry: &txqi->schedule_order);
1552	spin_unlock_bh(lock: &local->active_txq_lock[txqi->txq.ac]);
1553	}
1554
1555	void ieee80211_txq_set_params(struct ieee80211_local *local)
1556	{
1557	if (local->hw.wiphy->txq_limit)
1558	local->fq.limit = local->hw.wiphy->txq_limit;
1559	else
1560	local->hw.wiphy->txq_limit = local->fq.limit;
1561
1562	if (local->hw.wiphy->txq_memory_limit)
1563	local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1564	else
1565	local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1566
1567	if (local->hw.wiphy->txq_quantum)
1568	local->fq.quantum = local->hw.wiphy->txq_quantum;
1569	else
1570	local->hw.wiphy->txq_quantum = local->fq.quantum;
1571	}
1572
1573	int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1574	{
1575	struct fq *fq = &local->fq;
1576	int ret;
1577	int i;
1578	bool supp_vht = false;
1579	enum nl80211_band band;
1580
1581	ret = fq_init(fq, flows_cnt: 4096);
1582	if (ret)
1583	return ret;
1584
1585	/*
1586	* If the hardware doesn't support VHT, it is safe to limit the maximum
1587	* queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1588	*/
1589	for (band = 0; band < NUM_NL80211_BANDS; band++) {
1590	struct ieee80211_supported_band *sband;
1591
1592	sband = local->hw.wiphy->bands[band];
1593	if (!sband)
1594	continue;
1595
1596	supp_vht = supp_vht || sband->vht_cap.vht_supported;
1597	}
1598
1599	if (!supp_vht)
1600	fq->memory_limit = 4 << 20; /* 4 Mbytes */
1601
1602	codel_params_init(params: &local->cparams);
1603	local->cparams.interval = MS2TIME(100);
1604	local->cparams.target = MS2TIME(20);
1605	local->cparams.ecn = true;
1606
1607	local->cvars = kcalloc(n: fq->flows_cnt, size: sizeof(local->cvars[0]),
1608	GFP_KERNEL);
1609	if (!local->cvars) {
1610	spin_lock_bh(lock: &fq->lock);
1611	fq_reset(fq, free_func: fq_skb_free_func);
1612	spin_unlock_bh(lock: &fq->lock);
1613	return -ENOMEM;
1614	}
1615
1616	for (i = 0; i < fq->flows_cnt; i++)
1617	codel_vars_init(vars: &local->cvars[i]);
1618
1619	ieee80211_txq_set_params(local);
1620
1621	return 0;
1622	}
1623
1624	void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1625	{
1626	struct fq *fq = &local->fq;
1627
1628	kfree(objp: local->cvars);
1629	local->cvars = NULL;
1630
1631	spin_lock_bh(lock: &fq->lock);
1632	fq_reset(fq, free_func: fq_skb_free_func);
1633	spin_unlock_bh(lock: &fq->lock);
1634	}
1635
1636	static bool ieee80211_queue_skb(struct ieee80211_local *local,
1637	struct ieee80211_sub_if_data *sdata,
1638	struct sta_info *sta,
1639	struct sk_buff *skb)
1640	{
1641	struct ieee80211_vif *vif;
1642	struct txq_info *txqi;
1643
1644	if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1645	return false;
1646
1647	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1648	sdata = container_of(sdata->bss,
1649	struct ieee80211_sub_if_data, u.ap);
1650
1651	vif = &sdata->vif;
1652	txqi = ieee80211_get_txq(local, vif, sta, skb);
1653
1654	if (!txqi)
1655	return false;
1656
1657	ieee80211_txq_enqueue(local, txqi, skb);
1658
1659	schedule_and_wake_txq(local, txqi);
1660
1661	return true;
1662	}
1663
1664	static bool ieee80211_tx_frags(struct ieee80211_local *local,
1665	struct ieee80211_vif *vif,
1666	struct sta_info *sta,
1667	struct sk_buff_head *skbs,
1668	bool txpending)
1669	{
1670	struct ieee80211_tx_control control = {};
1671	struct sk_buff *skb, *tmp;
1672	unsigned long flags;
1673
1674	skb_queue_walk_safe(skbs, skb, tmp) {
1675	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1676	int q = info->hw_queue;
1677
1678	#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1679	if (WARN_ON_ONCE(q >= local->hw.queues)) {
1680	__skb_unlink(skb, list: skbs);
1681	ieee80211_free_txskb(hw: &local->hw, skb);
1682	continue;
1683	}
1684	#endif
1685
1686	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1687	if (local->queue_stop_reasons[q] ||
1688	(!txpending && !skb_queue_empty(list: &local->pending[q]))) {
1689	if (unlikely(info->flags &
1690	IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1691	if (local->queue_stop_reasons[q] &
1692	~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1693	/*
1694	* Drop off-channel frames if queues
1695	* are stopped for any reason other
1696	* than off-channel operation. Never
1697	* queue them.
1698	*/
1699	spin_unlock_irqrestore(
1700	lock: &local->queue_stop_reason_lock,
1701	flags);
1702	ieee80211_purge_tx_queue(hw: &local->hw,
1703	skbs);
1704	return true;
1705	}
1706	} else {
1707
1708	/*
1709	* Since queue is stopped, queue up frames for
1710	* later transmission from the tx-pending
1711	* tasklet when the queue is woken again.
1712	*/
1713	if (txpending)
1714	skb_queue_splice_init(list: skbs,
1715	head: &local->pending[q]);
1716	else
1717	skb_queue_splice_tail_init(list: skbs,
1718	head: &local->pending[q]);
1719
1720	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock,
1721	flags);
1722	return false;
1723	}
1724	}
1725	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
1726
1727	info->control.vif = vif;
1728	control.sta = sta ? &sta->sta : NULL;
1729
1730	__skb_unlink(skb, list: skbs);
1731	drv_tx(local, control: &control, skb);
1732	}
1733
1734	return true;
1735	}
1736
1737	/*
1738	* Returns false if the frame couldn't be transmitted but was queued instead.
1739	*/
1740	static bool __ieee80211_tx(struct ieee80211_local *local,
1741	struct sk_buff_head *skbs, struct sta_info *sta,
1742	bool txpending)
1743	{
1744	struct ieee80211_tx_info *info;
1745	struct ieee80211_sub_if_data *sdata;
1746	struct ieee80211_vif *vif;
1747	struct sk_buff *skb;
1748	bool result;
1749
1750	if (WARN_ON(skb_queue_empty(skbs)))
1751	return true;
1752
1753	skb = skb_peek(list_: skbs);
1754	info = IEEE80211_SKB_CB(skb);
1755	sdata = vif_to_sdata(p: info->control.vif);
1756	if (sta && !sta->uploaded)
1757	sta = NULL;
1758
1759	switch (sdata->vif.type) {
1760	case NL80211_IFTYPE_MONITOR:
1761	if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1762	vif = &sdata->vif;
1763	break;
1764	}
1765	sdata = rcu_dereference(local->monitor_sdata);
1766	if (sdata) {
1767	vif = &sdata->vif;
1768	info->hw_queue =
1769	vif->hw_queue[skb_get_queue_mapping(skb)];
1770	} else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1771	ieee80211_purge_tx_queue(hw: &local->hw, skbs);
1772	return true;
1773	} else
1774	vif = NULL;
1775	break;
1776	case NL80211_IFTYPE_AP_VLAN:
1777	sdata = container_of(sdata->bss,
1778	struct ieee80211_sub_if_data, u.ap);
1779	fallthrough;
1780	default:
1781	vif = &sdata->vif;
1782	break;
1783	}
1784
1785	result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1786
1787	WARN_ON_ONCE(!skb_queue_empty(skbs));
1788
1789	return result;
1790	}
1791
1792	/*
1793	* Invoke TX handlers, return 0 on success and non-zero if the
1794	* frame was dropped or queued.
1795	*
1796	* The handlers are split into an early and late part. The latter is everything
1797	* that can be sensitive to reordering, and will be deferred to after packets
1798	* are dequeued from the intermediate queues (when they are enabled).
1799	*/
1800	static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1801	{
1802	ieee80211_tx_result res = TX_DROP;
1803
1804	#define CALL_TXH(txh) \
1805	do { \
1806	res = txh(tx); \
1807	if (res != TX_CONTINUE) \
1808	goto txh_done; \
1809	} while (0)
1810
1811	CALL_TXH(ieee80211_tx_h_dynamic_ps);
1812	CALL_TXH(ieee80211_tx_h_check_assoc);
1813	CALL_TXH(ieee80211_tx_h_ps_buf);
1814	CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1815	CALL_TXH(ieee80211_tx_h_select_key);
1816
1817	txh_done:
1818	if (unlikely(res == TX_DROP)) {
1819	I802_DEBUG_INC(tx->local->tx_handlers_drop);
1820	if (tx->skb)
1821	ieee80211_free_txskb(hw: &tx->local->hw, skb: tx->skb);
1822	else
1823	ieee80211_purge_tx_queue(hw: &tx->local->hw, skbs: &tx->skbs);
1824	return -1;
1825	} else if (unlikely(res == TX_QUEUED)) {
1826	I802_DEBUG_INC(tx->local->tx_handlers_queued);
1827	return -1;
1828	}
1829
1830	return 0;
1831	}
1832
1833	/*
1834	* Late handlers can be called while the sta lock is held. Handlers that can
1835	* cause packets to be generated will cause deadlock!
1836	*/
1837	static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1838	{
1839	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
1840	ieee80211_tx_result res = TX_CONTINUE;
1841
1842	if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1843	CALL_TXH(ieee80211_tx_h_rate_ctrl);
1844
1845	if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1846	__skb_queue_tail(list: &tx->skbs, newsk: tx->skb);
1847	tx->skb = NULL;
1848	goto txh_done;
1849	}
1850
1851	CALL_TXH(ieee80211_tx_h_michael_mic_add);
1852	CALL_TXH(ieee80211_tx_h_sequence);
1853	CALL_TXH(ieee80211_tx_h_fragment);
1854	/* handlers after fragment must be aware of tx info fragmentation! */
1855	CALL_TXH(ieee80211_tx_h_stats);
1856	CALL_TXH(ieee80211_tx_h_encrypt);
1857	if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1858	CALL_TXH(ieee80211_tx_h_calculate_duration);
1859	#undef CALL_TXH
1860
1861	txh_done:
1862	if (unlikely(res == TX_DROP)) {
1863	I802_DEBUG_INC(tx->local->tx_handlers_drop);
1864	if (tx->skb)
1865	ieee80211_free_txskb(hw: &tx->local->hw, skb: tx->skb);
1866	else
1867	ieee80211_purge_tx_queue(hw: &tx->local->hw, skbs: &tx->skbs);
1868	return -1;
1869	} else if (unlikely(res == TX_QUEUED)) {
1870	I802_DEBUG_INC(tx->local->tx_handlers_queued);
1871	return -1;
1872	}
1873
1874	return 0;
1875	}
1876
1877	static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1878	{
1879	int r = invoke_tx_handlers_early(tx);
1880
1881	if (r)
1882	return r;
1883	return invoke_tx_handlers_late(tx);
1884	}
1885
1886	bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1887	struct ieee80211_vif *vif, struct sk_buff *skb,
1888	int band, struct ieee80211_sta **sta)
1889	{
1890	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
1891	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1892	struct ieee80211_tx_data tx;
1893	struct sk_buff *skb2;
1894
1895	if (ieee80211_tx_prepare(sdata, tx: &tx, NULL, skb) == TX_DROP)
1896	return false;
1897
1898	info->band = band;
1899	info->control.vif = vif;
1900	info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1901
1902	if (invoke_tx_handlers(tx: &tx))
1903	return false;
1904
1905	if (sta) {
1906	if (tx.sta)
1907	*sta = &tx.sta->sta;
1908	else
1909	*sta = NULL;
1910	}
1911
1912	/* this function isn't suitable for fragmented data frames */
1913	skb2 = __skb_dequeue(list: &tx.skbs);
1914	if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1915	ieee80211_free_txskb(hw, skb: skb2);
1916	ieee80211_purge_tx_queue(hw, skbs: &tx.skbs);
1917	return false;
1918	}
1919
1920	return true;
1921	}
1922	EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1923
1924	/*
1925	* Returns false if the frame couldn't be transmitted but was queued instead.
1926	*/
1927	static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1928	struct sta_info *sta, struct sk_buff *skb,
1929	bool txpending)
1930	{
1931	struct ieee80211_local *local = sdata->local;
1932	struct ieee80211_tx_data tx;
1933	ieee80211_tx_result res_prepare;
1934	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1935	bool result = true;
1936
1937	if (unlikely(skb->len < 10)) {
1938	dev_kfree_skb(skb);
1939	return true;
1940	}
1941
1942	/* initialises tx */
1943	res_prepare = ieee80211_tx_prepare(sdata, tx: &tx, sta, skb);
1944
1945	if (unlikely(res_prepare == TX_DROP)) {
1946	ieee80211_free_txskb(hw: &local->hw, skb);
1947	return true;
1948	} else if (unlikely(res_prepare == TX_QUEUED)) {
1949	return true;
1950	}
1951
1952	/* set up hw_queue value early */
1953	if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1954	!ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1955	info->hw_queue =
1956	sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1957
1958	if (invoke_tx_handlers_early(tx: &tx))
1959	return true;
1960
1961	if (ieee80211_queue_skb(local, sdata, sta: tx.sta, skb: tx.skb))
1962	return true;
1963
1964	if (!invoke_tx_handlers_late(tx: &tx))
1965	result = __ieee80211_tx(local, skbs: &tx.skbs, sta: tx.sta, txpending);
1966
1967	return result;
1968	}
1969
1970	/* device xmit handlers */
1971
1972	enum ieee80211_encrypt {
1973	ENCRYPT_NO,
1974	ENCRYPT_MGMT,
1975	ENCRYPT_DATA,
1976	};
1977
1978	static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1979	struct sk_buff *skb,
1980	int head_need,
1981	enum ieee80211_encrypt encrypt)
1982	{
1983	struct ieee80211_local *local = sdata->local;
1984	bool enc_tailroom;
1985	int tail_need = 0;
1986
1987	enc_tailroom = encrypt == ENCRYPT_MGMT ||
1988	(encrypt == ENCRYPT_DATA &&
1989	sdata->crypto_tx_tailroom_needed_cnt);
1990
1991	if (enc_tailroom) {
1992	tail_need = IEEE80211_ENCRYPT_TAILROOM;
1993	tail_need -= skb_tailroom(skb);
1994	tail_need = max_t(int, tail_need, 0);
1995	}
1996
1997	if (skb_cloned(skb) &&
1998	(!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
1999	!skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
2000	I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
2001	else if (head_need || tail_need)
2002	I802_DEBUG_INC(local->tx_expand_skb_head);
2003	else
2004	return 0;
2005
2006	if (pskb_expand_head(skb, nhead: head_need, ntail: tail_need, GFP_ATOMIC)) {
2007	wiphy_debug(local->hw.wiphy,
2008	"failed to reallocate TX buffer\n");
2009	return -ENOMEM;
2010	}
2011
2012	return 0;
2013	}
2014
2015	void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
2016	struct sta_info *sta, struct sk_buff *skb)
2017	{
2018	struct ieee80211_local *local = sdata->local;
2019	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2020	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2021	int headroom;
2022	enum ieee80211_encrypt encrypt;
2023
2024	if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
2025	encrypt = ENCRYPT_NO;
2026	else if (ieee80211_is_mgmt(fc: hdr->frame_control))
2027	encrypt = ENCRYPT_MGMT;
2028	else
2029	encrypt = ENCRYPT_DATA;
2030
2031	headroom = local->tx_headroom;
2032	if (encrypt != ENCRYPT_NO)
2033	headroom += IEEE80211_ENCRYPT_HEADROOM;
2034	headroom -= skb_headroom(skb);
2035	headroom = max_t(int, 0, headroom);
2036
2037	if (ieee80211_skb_resize(sdata, skb, head_need: headroom, encrypt)) {
2038	ieee80211_free_txskb(hw: &local->hw, skb);
2039	return;
2040	}
2041
2042	/* reload after potential resize */
2043	hdr = (struct ieee80211_hdr *) skb->data;
2044	info->control.vif = &sdata->vif;
2045
2046	if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
2047	if (ieee80211_is_data(fc: hdr->frame_control) &&
2048	is_unicast_ether_addr(addr: hdr->addr1)) {
2049	if (mesh_nexthop_resolve(sdata, skb))
2050	return; /* skb queued: don't free */
2051	} else {
2052	ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2053	}
2054	}
2055
2056	ieee80211_set_qos_hdr(sdata, skb);
2057	ieee80211_tx(sdata, sta, skb, txpending: false);
2058	}
2059
2060	static bool ieee80211_validate_radiotap_len(struct sk_buff *skb)
2061	{
2062	struct ieee80211_radiotap_header *rthdr =
2063	(struct ieee80211_radiotap_header *)skb->data;
2064
2065	/* check for not even having the fixed radiotap header part */
2066	if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2067	return false; /* too short to be possibly valid */
2068
2069	/* is it a header version we can trust to find length from? */
2070	if (unlikely(rthdr->it_version))
2071	return false; /* only version 0 is supported */
2072
2073	/* does the skb contain enough to deliver on the alleged length? */
2074	if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2075	return false; /* skb too short for claimed rt header extent */
2076
2077	return true;
2078	}
2079
2080	bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2081	struct net_device *dev)
2082	{
2083	struct ieee80211_local *local = wdev_priv(wdev: dev->ieee80211_ptr);
2084	struct ieee80211_radiotap_iterator iterator;
2085	struct ieee80211_radiotap_header *rthdr =
2086	(struct ieee80211_radiotap_header *) skb->data;
2087	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2088	int ret = ieee80211_radiotap_iterator_init(iterator: &iterator, radiotap_header: rthdr, max_length: skb->len,
2089	NULL);
2090	u16 txflags;
2091	u16 rate = 0;
2092	bool rate_found = false;
2093	u8 rate_retries = 0;
2094	u16 rate_flags = 0;
2095	u8 mcs_known, mcs_flags, mcs_bw;
2096	u16 vht_known;
2097	u8 vht_mcs = 0, vht_nss = 0;
2098	int i;
2099
2100	if (!ieee80211_validate_radiotap_len(skb))
2101	return false;
2102
2103	info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2104	IEEE80211_TX_CTL_DONTFRAG;
2105
2106	/*
2107	* for every radiotap entry that is present
2108	* (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2109	* entries present, or -EINVAL on error)
2110	*/
2111
2112	while (!ret) {
2113	ret = ieee80211_radiotap_iterator_next(iterator: &iterator);
2114
2115	if (ret)
2116	continue;
2117
2118	/* see if this argument is something we can use */
2119	switch (iterator.this_arg_index) {
2120	/*
2121	* You must take care when dereferencing iterator.this_arg
2122	* for multibyte types... the pointer is not aligned. Use
2123	* get_unaligned((type *)iterator.this_arg) to dereference
2124	* iterator.this_arg for type "type" safely on all arches.
2125	*/
2126	case IEEE80211_RADIOTAP_FLAGS:
2127	if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2128	/*
2129	* this indicates that the skb we have been
2130	* handed has the 32-bit FCS CRC at the end...
2131	* we should react to that by snipping it off
2132	* because it will be recomputed and added
2133	* on transmission
2134	*/
2135	if (skb->len < (iterator._max_length + FCS_LEN))
2136	return false;
2137
2138	skb_trim(skb, len: skb->len - FCS_LEN);
2139	}
2140	if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2141	info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2142	if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2143	info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2144	break;
2145
2146	case IEEE80211_RADIOTAP_TX_FLAGS:
2147	txflags = get_unaligned_le16(p: iterator.this_arg);
2148	if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2149	info->flags |= IEEE80211_TX_CTL_NO_ACK;
2150	if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2151	info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2152	if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2153	info->control.flags |=
2154	IEEE80211_TX_CTRL_DONT_REORDER;
2155	break;
2156
2157	case IEEE80211_RADIOTAP_RATE:
2158	rate = *iterator.this_arg;
2159	rate_flags = 0;
2160	rate_found = true;
2161	break;
2162
2163	case IEEE80211_RADIOTAP_ANTENNA:
2164	/* this can appear multiple times, keep a bitmap */
2165	info->control.antennas |= BIT(*iterator.this_arg);
2166	break;
2167
2168	case IEEE80211_RADIOTAP_DATA_RETRIES:
2169	rate_retries = *iterator.this_arg;
2170	break;
2171
2172	case IEEE80211_RADIOTAP_MCS:
2173	mcs_known = iterator.this_arg[0];
2174	mcs_flags = iterator.this_arg[1];
2175	if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2176	break;
2177
2178	rate_found = true;
2179	rate = iterator.this_arg[2];
2180	rate_flags = IEEE80211_TX_RC_MCS;
2181
2182	if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2183	mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2184	rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2185
2186	mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2187	if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2188	mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2189	rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2190
2191	if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2192	mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2193	info->flags |= IEEE80211_TX_CTL_LDPC;
2194
2195	if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2196	u8 stbc = u8_get_bits(v: mcs_flags,
2197	field: IEEE80211_RADIOTAP_MCS_STBC_MASK);
2198
2199	info->flags |=
2200	u32_encode_bits(v: stbc,
2201	field: IEEE80211_TX_CTL_STBC);
2202	}
2203	break;
2204
2205	case IEEE80211_RADIOTAP_VHT:
2206	vht_known = get_unaligned_le16(p: iterator.this_arg);
2207	rate_found = true;
2208
2209	rate_flags = IEEE80211_TX_RC_VHT_MCS;
2210	if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2211	(iterator.this_arg[2] &
2212	IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2213	rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2214	if (vht_known &
2215	IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2216	if (iterator.this_arg[3] == 1)
2217	rate_flags |=
2218	IEEE80211_TX_RC_40_MHZ_WIDTH;
2219	else if (iterator.this_arg[3] == 4)
2220	rate_flags |=
2221	IEEE80211_TX_RC_80_MHZ_WIDTH;
2222	else if (iterator.this_arg[3] == 11)
2223	rate_flags |=
2224	IEEE80211_TX_RC_160_MHZ_WIDTH;
2225	}
2226
2227	vht_mcs = iterator.this_arg[4] >> 4;
2228	if (vht_mcs > 11)
2229	vht_mcs = 0;
2230	vht_nss = iterator.this_arg[4] & 0xF;
2231	if (!vht_nss || vht_nss > 8)
2232	vht_nss = 1;
2233	break;
2234
2235	/*
2236	* Please update the file
2237	* Documentation/networking/mac80211-injection.rst
2238	* when parsing new fields here.
2239	*/
2240
2241	default:
2242	break;
2243	}
2244	}
2245
2246	if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2247	return false;
2248
2249	if (rate_found) {
2250	struct ieee80211_supported_band *sband =
2251	local->hw.wiphy->bands[info->band];
2252
2253	info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2254
2255	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2256	info->control.rates[i].idx = -1;
2257	info->control.rates[i].flags = 0;
2258	info->control.rates[i].count = 0;
2259	}
2260
2261	if (rate_flags & IEEE80211_TX_RC_MCS) {
2262	/* reset antennas if not enough */
2263	if (IEEE80211_HT_MCS_CHAINS(rate) >
2264	hweight8(info->control.antennas))
2265	info->control.antennas = 0;
2266
2267	info->control.rates[0].idx = rate;
2268	} else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2269	/* reset antennas if not enough */
2270	if (vht_nss > hweight8(info->control.antennas))
2271	info->control.antennas = 0;
2272
2273	ieee80211_rate_set_vht(rate: info->control.rates, mcs: vht_mcs,
2274	nss: vht_nss);
2275	} else if (sband) {
2276	for (i = 0; i < sband->n_bitrates; i++) {
2277	if (rate * 5 != sband->bitrates[i].bitrate)
2278	continue;
2279
2280	info->control.rates[0].idx = i;
2281	break;
2282	}
2283	}
2284
2285	if (info->control.rates[0].idx < 0)
2286	info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2287
2288	info->control.rates[0].flags = rate_flags;
2289	info->control.rates[0].count = min_t(u8, rate_retries + 1,
2290	local->hw.max_rate_tries);
2291	}
2292
2293	return true;
2294	}
2295
2296	netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2297	struct net_device *dev)
2298	{
2299	struct ieee80211_local *local = wdev_priv(wdev: dev->ieee80211_ptr);
2300	struct ieee80211_chanctx_conf *chanctx_conf;
2301	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2302	struct ieee80211_hdr *hdr;
2303	struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2304	struct cfg80211_chan_def *chandef;
2305	u16 len_rthdr;
2306	int hdrlen;
2307
2308	sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2309	if (unlikely(!ieee80211_sdata_running(sdata)))
2310	goto fail;
2311
2312	memset(info, 0, sizeof(*info));
2313	info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2314	IEEE80211_TX_CTL_INJECTED;
2315
2316	/* Sanity-check the length of the radiotap header */
2317	if (!ieee80211_validate_radiotap_len(skb))
2318	goto fail;
2319
2320	/* we now know there is a radiotap header with a length we can use */
2321	len_rthdr = ieee80211_get_radiotap_len(data: skb->data);
2322
2323	/*
2324	* fix up the pointers accounting for the radiotap
2325	* header still being in there. We are being given
2326	* a precooked IEEE80211 header so no need for
2327	* normal processing
2328	*/
2329	skb_set_mac_header(skb, offset: len_rthdr);
2330	/*
2331	* these are just fixed to the end of the rt area since we
2332	* don't have any better information and at this point, nobody cares
2333	*/
2334	skb_set_network_header(skb, offset: len_rthdr);
2335	skb_set_transport_header(skb, offset: len_rthdr);
2336
2337	if (skb->len < len_rthdr + 2)
2338	goto fail;
2339
2340	hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2341	hdrlen = ieee80211_hdrlen(fc: hdr->frame_control);
2342
2343	if (skb->len < len_rthdr + hdrlen)
2344	goto fail;
2345
2346	/*
2347	* Initialize skb->protocol if the injected frame is a data frame
2348	* carrying a rfc1042 header
2349	*/
2350	if (ieee80211_is_data(fc: hdr->frame_control) &&
2351	skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2352	u8 *payload = (u8 *)hdr + hdrlen;
2353
2354	if (ether_addr_equal(addr1: payload, addr2: rfc1042_header))
2355	skb->protocol = cpu_to_be16((payload[6] << 8) |
2356	payload[7]);
2357	}
2358
2359	rcu_read_lock();
2360
2361	/*
2362	* We process outgoing injected frames that have a local address
2363	* we handle as though they are non-injected frames.
2364	* This code here isn't entirely correct, the local MAC address
2365	* isn't always enough to find the interface to use; for proper
2366	* VLAN support we have an nl80211-based mechanism.
2367	*
2368	* This is necessary, for example, for old hostapd versions that
2369	* don't use nl80211-based management TX/RX.
2370	*/
2371	list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2372	if (!ieee80211_sdata_running(sdata: tmp_sdata))
2373	continue;
2374	if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2375	tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2376	continue;
2377	if (ether_addr_equal(addr1: tmp_sdata->vif.addr, addr2: hdr->addr2)) {
2378	sdata = tmp_sdata;
2379	break;
2380	}
2381	}
2382
2383	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
2384	if (!chanctx_conf) {
2385	tmp_sdata = rcu_dereference(local->monitor_sdata);
2386	if (tmp_sdata)
2387	chanctx_conf =
2388	rcu_dereference(tmp_sdata->vif.bss_conf.chanctx_conf);
2389	}
2390
2391	if (chanctx_conf)
2392	chandef = &chanctx_conf->def;
2393	else
2394	goto fail_rcu;
2395
2396	/*
2397	* If driver/HW supports IEEE80211_CHAN_CAN_MONITOR we still
2398	* shouldn't transmit on disabled channels.
2399	*/
2400	if (!cfg80211_chandef_usable(wiphy: local->hw.wiphy, chandef,
2401	prohibited_flags: IEEE80211_CHAN_DISABLED))
2402	goto fail_rcu;
2403
2404	/*
2405	* Frame injection is not allowed if beaconing is not allowed
2406	* or if we need radar detection. Beaconing is usually not allowed when
2407	* the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2408	* Passive scan is also used in world regulatory domains where
2409	* your country is not known and as such it should be treated as
2410	* NO TX unless the channel is explicitly allowed in which case
2411	* your current regulatory domain would not have the passive scan
2412	* flag.
2413	*
2414	* Since AP mode uses monitor interfaces to inject/TX management
2415	* frames we can make AP mode the exception to this rule once it
2416	* supports radar detection as its implementation can deal with
2417	* radar detection by itself. We can do that later by adding a
2418	* monitor flag interfaces used for AP support.
2419	*/
2420	if (!cfg80211_reg_can_beacon(wiphy: local->hw.wiphy, chandef,
2421	iftype: sdata->vif.type))
2422	goto fail_rcu;
2423
2424	info->band = chandef->chan->band;
2425
2426	/* Initialize skb->priority according to frame type and TID class,
2427	* with respect to the sub interface that the frame will actually
2428	* be transmitted on. If the DONT_REORDER flag is set, the original
2429	* skb-priority is preserved to assure frames injected with this
2430	* flag are not reordered relative to each other.
2431	*/
2432	ieee80211_select_queue_80211(sdata, skb, hdr);
2433	skb_set_queue_mapping(skb, queue_mapping: ieee80211_ac_from_tid(tid: skb->priority));
2434
2435	/*
2436	* Process the radiotap header. This will now take into account the
2437	* selected chandef above to accurately set injection rates and
2438	* retransmissions.
2439	*/
2440	if (!ieee80211_parse_tx_radiotap(skb, dev))
2441	goto fail_rcu;
2442
2443	/* remove the injection radiotap header */
2444	skb_pull(skb, len: len_rthdr);
2445
2446	ieee80211_xmit(sdata, NULL, skb);
2447	rcu_read_unlock();
2448
2449	return NETDEV_TX_OK;
2450
2451	fail_rcu:
2452	rcu_read_unlock();
2453	fail:
2454	dev_kfree_skb(skb);
2455	return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2456	}
2457
2458	static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2459	{
2460	u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2461
2462	return ethertype == ETH_P_TDLS &&
2463	skb->len > 14 &&
2464	skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2465	}
2466
2467	int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2468	struct sk_buff *skb,
2469	struct sta_info **sta_out)
2470	{
2471	struct sta_info *sta;
2472
2473	switch (sdata->vif.type) {
2474	case NL80211_IFTYPE_AP_VLAN:
2475	sta = rcu_dereference(sdata->u.vlan.sta);
2476	if (sta) {
2477	*sta_out = sta;
2478	return 0;
2479	} else if (sdata->wdev.use_4addr) {
2480	return -ENOLINK;
2481	}
2482	fallthrough;
2483	case NL80211_IFTYPE_AP:
2484	case NL80211_IFTYPE_OCB:
2485	case NL80211_IFTYPE_ADHOC:
2486	if (is_multicast_ether_addr(addr: skb->data)) {
2487	*sta_out = ERR_PTR(error: -ENOENT);
2488	return 0;
2489	}
2490	sta = sta_info_get_bss(sdata, addr: skb->data);
2491	break;
2492	#ifdef CONFIG_MAC80211_MESH
2493	case NL80211_IFTYPE_MESH_POINT:
2494	/* determined much later */
2495	*sta_out = NULL;
2496	return 0;
2497	#endif
2498	case NL80211_IFTYPE_STATION:
2499	if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2500	sta = sta_info_get(sdata, addr: skb->data);
2501	if (sta && test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER)) {
2502	if (test_sta_flag(sta,
2503	flag: WLAN_STA_TDLS_PEER_AUTH)) {
2504	*sta_out = sta;
2505	return 0;
2506	}
2507
2508	/*
2509	* TDLS link during setup - throw out frames to
2510	* peer. Allow TDLS-setup frames to unauthorized
2511	* peers for the special case of a link teardown
2512	* after a TDLS sta is removed due to being
2513	* unreachable.
2514	*/
2515	if (!ieee80211_is_tdls_setup(skb))
2516	return -EINVAL;
2517	}
2518
2519	}
2520
2521	sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
2522	if (!sta)
2523	return -ENOLINK;
2524	break;
2525	default:
2526	return -EINVAL;
2527	}
2528
2529	*sta_out = sta ?: ERR_PTR(error: -ENOENT);
2530	return 0;
2531	}
2532
2533	static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2534	struct sk_buff *skb,
2535	u32 *info_flags,
2536	u64 *cookie)
2537	{
2538	struct sk_buff *ack_skb;
2539	u16 info_id = 0;
2540
2541	if (skb->sk)
2542	ack_skb = skb_clone_sk(skb);
2543	else
2544	ack_skb = skb_clone(skb, GFP_ATOMIC);
2545
2546	if (ack_skb) {
2547	unsigned long flags;
2548	int id;
2549
2550	spin_lock_irqsave(&local->ack_status_lock, flags);
2551	id = idr_alloc(&local->ack_status_frames, ptr: ack_skb,
2552	start: 1, end: 0x2000, GFP_ATOMIC);
2553	spin_unlock_irqrestore(lock: &local->ack_status_lock, flags);
2554
2555	if (id >= 0) {
2556	info_id = id;
2557	*info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2558	if (cookie) {
2559	*cookie = ieee80211_mgmt_tx_cookie(local);
2560	IEEE80211_SKB_CB(skb: ack_skb)->ack.cookie = *cookie;
2561	}
2562	} else {
2563	kfree_skb(skb: ack_skb);
2564	}
2565	}
2566
2567	return info_id;
2568	}
2569
2570	/**
2571	* ieee80211_build_hdr - build 802.11 header in the given frame
2572	* @sdata: virtual interface to build the header for
2573	* @skb: the skb to build the header in
2574	* @info_flags: skb flags to set
2575	* @sta: the station pointer
2576	* @ctrl_flags: info control flags to set
2577	* @cookie: cookie pointer to fill (if not %NULL)
2578	*
2579	* This function takes the skb with 802.3 header and reformats the header to
2580	* the appropriate IEEE 802.11 header based on which interface the packet is
2581	* being transmitted on.
2582	*
2583	* Note that this function also takes care of the TX status request and
2584	* potential unsharing of the SKB - this needs to be interleaved with the
2585	* header building.
2586	*
2587	* The function requires the read-side RCU lock held
2588	*
2589	* Returns: the (possibly reallocated) skb or an ERR_PTR() code
2590	*/
2591	static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2592	struct sk_buff *skb, u32 info_flags,
2593	struct sta_info *sta, u32 ctrl_flags,
2594	u64 *cookie)
2595	{
2596	struct ieee80211_local *local = sdata->local;
2597	struct ieee80211_tx_info *info;
2598	int head_need;
2599	u16 ethertype, hdrlen, meshhdrlen = 0;
2600	__le16 fc;
2601	struct ieee80211_hdr hdr;
2602	struct ieee80211s_hdr mesh_hdr __maybe_unused;
2603	struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2604	const u8 *encaps_data;
2605	int encaps_len, skip_header_bytes;
2606	bool wme_sta = false, authorized = false;
2607	bool tdls_peer;
2608	bool multicast;
2609	u16 info_id = 0;
2610	struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2611	enum nl80211_band band;
2612	int ret;
2613	u8 link_id = u32_get_bits(v: ctrl_flags, field: IEEE80211_TX_CTRL_MLO_LINK);
2614
2615	if (IS_ERR(ptr: sta))
2616	sta = NULL;
2617
2618	#ifdef CONFIG_MAC80211_DEBUGFS
2619	if (local->force_tx_status)
2620	info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2621	#endif
2622
2623	/* convert Ethernet header to proper 802.11 header (based on
2624	* operation mode) */
2625	ethertype = (skb->data[12] << 8) | skb->data[13];
2626	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2627
2628	if (!ieee80211_vif_is_mld(vif: &sdata->vif))
2629	chanctx_conf =
2630	rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
2631
2632	switch (sdata->vif.type) {
2633	case NL80211_IFTYPE_AP_VLAN:
2634	if (sdata->wdev.use_4addr) {
2635	fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2636	/* RA TA DA SA */
2637	memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2638	memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2639	memcpy(hdr.addr3, skb->data, ETH_ALEN);
2640	memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2641	hdrlen = 30;
2642	authorized = test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED);
2643	wme_sta = sta->sta.wme;
2644	}
2645	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
2646	struct ieee80211_sub_if_data *ap_sdata;
2647
2648	/* override chanctx_conf from AP (we don't have one) */
2649	ap_sdata = container_of(sdata->bss,
2650	struct ieee80211_sub_if_data,
2651	u.ap);
2652	chanctx_conf =
2653	rcu_dereference(ap_sdata->vif.bss_conf.chanctx_conf);
2654	}
2655	if (sdata->wdev.use_4addr)
2656	break;
2657	fallthrough;
2658	case NL80211_IFTYPE_AP:
2659	fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2660	/* DA BSSID SA */
2661	memcpy(hdr.addr1, skb->data, ETH_ALEN);
2662
2663	if (ieee80211_vif_is_mld(vif: &sdata->vif) && sta && !sta->sta.mlo) {
2664	struct ieee80211_link_data *link;
2665
2666	link_id = sta->deflink.link_id;
2667	link = rcu_dereference(sdata->link[link_id]);
2668	if (WARN_ON(!link)) {
2669	ret = -ENOLINK;
2670	goto free;
2671	}
2672	memcpy(hdr.addr2, link->conf->addr, ETH_ALEN);
2673	} else if (link_id == IEEE80211_LINK_UNSPECIFIED ||
2674	(sta && sta->sta.mlo)) {
2675	memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2676	} else {
2677	struct ieee80211_bss_conf *conf;
2678
2679	conf = rcu_dereference(sdata->vif.link_conf[link_id]);
2680	if (unlikely(!conf)) {
2681	ret = -ENOLINK;
2682	goto free;
2683	}
2684
2685	memcpy(hdr.addr2, conf->addr, ETH_ALEN);
2686	}
2687
2688	memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2689	hdrlen = 24;
2690	break;
2691	#ifdef CONFIG_MAC80211_MESH
2692	case NL80211_IFTYPE_MESH_POINT:
2693	if (!is_multicast_ether_addr(addr: skb->data)) {
2694	struct sta_info *next_hop;
2695	bool mpp_lookup = true;
2696
2697	mpath = mesh_path_lookup(sdata, dst: skb->data);
2698	if (mpath) {
2699	mpp_lookup = false;
2700	next_hop = rcu_dereference(mpath->next_hop);
2701	if (!next_hop ||
2702	!(mpath->flags & (MESH_PATH_ACTIVE |
2703	MESH_PATH_RESOLVING)))
2704	mpp_lookup = true;
2705	}
2706
2707	if (mpp_lookup) {
2708	mppath = mpp_path_lookup(sdata, dst: skb->data);
2709	if (mppath)
2710	mppath->exp_time = jiffies;
2711	}
2712
2713	if (mppath && mpath)
2714	mesh_path_del(sdata, addr: mpath->dst);
2715	}
2716
2717	/*
2718	* Use address extension if it is a packet from
2719	* another interface or if we know the destination
2720	* is being proxied by a portal (i.e. portal address
2721	* differs from proxied address)
2722	*/
2723	if (ether_addr_equal(addr1: sdata->vif.addr, addr2: skb->data + ETH_ALEN) &&
2724	!(mppath && !ether_addr_equal(addr1: mppath->mpp, addr2: skb->data))) {
2725	hdrlen = ieee80211_fill_mesh_addresses(hdr: &hdr, fc: &fc,
2726	da: skb->data, sa: skb->data + ETH_ALEN);
2727	meshhdrlen = ieee80211_new_mesh_header(sdata, meshhdr: &mesh_hdr,
2728	NULL, NULL);
2729	} else {
2730	/* DS -> MBSS (802.11-2012 13.11.3.3).
2731	* For unicast with unknown forwarding information,
2732	* destination might be in the MBSS or if that fails
2733	* forwarded to another mesh gate. In either case
2734	* resolution will be handled in ieee80211_xmit(), so
2735	* leave the original DA. This also works for mcast */
2736	const u8 *mesh_da = skb->data;
2737
2738	if (mppath)
2739	mesh_da = mppath->mpp;
2740	else if (mpath)
2741	mesh_da = mpath->dst;
2742
2743	hdrlen = ieee80211_fill_mesh_addresses(hdr: &hdr, fc: &fc,
2744	da: mesh_da, sa: sdata->vif.addr);
2745	if (is_multicast_ether_addr(addr: mesh_da))
2746	/* DA TA mSA AE:SA */
2747	meshhdrlen = ieee80211_new_mesh_header(
2748	sdata, meshhdr: &mesh_hdr,
2749	addr4or5: skb->data + ETH_ALEN, NULL);
2750	else
2751	/* RA TA mDA mSA AE:DA SA */
2752	meshhdrlen = ieee80211_new_mesh_header(
2753	sdata, meshhdr: &mesh_hdr, addr4or5: skb->data,
2754	addr6: skb->data + ETH_ALEN);
2755
2756	}
2757
2758	/* For injected frames, fill RA right away as nexthop lookup
2759	* will be skipped.
2760	*/
2761	if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2762	is_zero_ether_addr(addr: hdr.addr1))
2763	memcpy(hdr.addr1, skb->data, ETH_ALEN);
2764	break;
2765	#endif
2766	case NL80211_IFTYPE_STATION:
2767	/* we already did checks when looking up the RA STA */
2768	tdls_peer = test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER);
2769
2770	if (tdls_peer) {
2771	/* For TDLS only one link can be valid with peer STA */
2772	int tdls_link_id = sta->sta.valid_links ?
2773	__ffs(sta->sta.valid_links) : 0;
2774	struct ieee80211_link_data *link;
2775
2776	/* DA SA BSSID */
2777	memcpy(hdr.addr1, skb->data, ETH_ALEN);
2778	memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2779	link = rcu_dereference(sdata->link[tdls_link_id]);
2780	if (WARN_ON_ONCE(!link)) {
2781	ret = -EINVAL;
2782	goto free;
2783	}
2784	memcpy(hdr.addr3, link->u.mgd.bssid, ETH_ALEN);
2785	hdrlen = 24;
2786	} else if (sdata->u.mgd.use_4addr &&
2787	cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2788	fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2789	IEEE80211_FCTL_TODS);
2790	/* RA TA DA SA */
2791	memcpy(hdr.addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
2792	memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2793	memcpy(hdr.addr3, skb->data, ETH_ALEN);
2794	memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2795	hdrlen = 30;
2796	} else {
2797	fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2798	/* BSSID SA DA */
2799	memcpy(hdr.addr1, sdata->vif.cfg.ap_addr, ETH_ALEN);
2800	memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2801	memcpy(hdr.addr3, skb->data, ETH_ALEN);
2802	hdrlen = 24;
2803	}
2804	break;
2805	case NL80211_IFTYPE_OCB:
2806	/* DA SA BSSID */
2807	memcpy(hdr.addr1, skb->data, ETH_ALEN);
2808	memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2809	eth_broadcast_addr(addr: hdr.addr3);
2810	hdrlen = 24;
2811	break;
2812	case NL80211_IFTYPE_ADHOC:
2813	/* DA SA BSSID */
2814	memcpy(hdr.addr1, skb->data, ETH_ALEN);
2815	memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2816	memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2817	hdrlen = 24;
2818	break;
2819	default:
2820	ret = -EINVAL;
2821	goto free;
2822	}
2823
2824	if (!chanctx_conf) {
2825	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
2826	ret = -ENOTCONN;
2827	goto free;
2828	}
2829	/* MLD transmissions must not rely on the band */
2830	band = 0;
2831	} else {
2832	band = chanctx_conf->def.chan->band;
2833	}
2834
2835	multicast = is_multicast_ether_addr(addr: hdr.addr1);
2836
2837	/* sta is always NULL for mesh */
2838	if (sta) {
2839	authorized = test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED);
2840	wme_sta = sta->sta.wme;
2841	} else if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
2842	/* For mesh, the use of the QoS header is mandatory */
2843	wme_sta = true;
2844	}
2845
2846	/* receiver does QoS (which also means we do) use it */
2847	if (wme_sta) {
2848	fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2849	hdrlen += 2;
2850	}
2851
2852	/*
2853	* Drop unicast frames to unauthorised stations unless they are
2854	* EAPOL frames from the local station.
2855	*/
2856	if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2857	(sdata->vif.type != NL80211_IFTYPE_OCB) &&
2858	!multicast && !authorized &&
2859	(cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2860	!ieee80211_is_our_addr(sdata, skb->data + ETH_ALEN, NULL)))) {
2861	#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2862	net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2863	sdata->name, hdr.addr1);
2864	#endif
2865
2866	I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2867
2868	ret = -EPERM;
2869	goto free;
2870	}
2871
2872	if (unlikely(!multicast &&
2873	((skb->sk &&
2874	skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2875	ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2876	info_id = ieee80211_store_ack_skb(local, skb, info_flags: &info_flags,
2877	cookie);
2878
2879	/*
2880	* If the skb is shared we need to obtain our own copy.
2881	*/
2882	skb = skb_share_check(skb, GFP_ATOMIC);
2883	if (unlikely(!skb)) {
2884	ret = -ENOMEM;
2885	goto free;
2886	}
2887
2888	hdr.frame_control = fc;
2889	hdr.duration_id = 0;
2890	hdr.seq_ctrl = 0;
2891
2892	skip_header_bytes = ETH_HLEN;
2893	if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2894	encaps_data = bridge_tunnel_header;
2895	encaps_len = sizeof(bridge_tunnel_header);
2896	skip_header_bytes -= 2;
2897	} else if (ethertype >= ETH_P_802_3_MIN) {
2898	encaps_data = rfc1042_header;
2899	encaps_len = sizeof(rfc1042_header);
2900	skip_header_bytes -= 2;
2901	} else {
2902	encaps_data = NULL;
2903	encaps_len = 0;
2904	}
2905
2906	skb_pull(skb, len: skip_header_bytes);
2907	head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2908
2909	/*
2910	* So we need to modify the skb header and hence need a copy of
2911	* that. The head_need variable above doesn't, so far, include
2912	* the needed header space that we don't need right away. If we
2913	* can, then we don't reallocate right now but only after the
2914	* frame arrives at the master device (if it does...)
2915	*
2916	* If we cannot, however, then we will reallocate to include all
2917	* the ever needed space. Also, if we need to reallocate it anyway,
2918	* make it big enough for everything we may ever need.
2919	*/
2920
2921	if (head_need > 0 || skb_cloned(skb)) {
2922	head_need += IEEE80211_ENCRYPT_HEADROOM;
2923	head_need += local->tx_headroom;
2924	head_need = max_t(int, 0, head_need);
2925	if (ieee80211_skb_resize(sdata, skb, head_need, encrypt: ENCRYPT_DATA)) {
2926	ieee80211_free_txskb(hw: &local->hw, skb);
2927	skb = NULL;
2928	return ERR_PTR(error: -ENOMEM);
2929	}
2930	}
2931
2932	if (encaps_data)
2933	memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2934
2935	#ifdef CONFIG_MAC80211_MESH
2936	if (meshhdrlen > 0)
2937	memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2938	#endif
2939
2940	if (ieee80211_is_data_qos(fc)) {
2941	__le16 *qos_control;
2942
2943	qos_control = skb_push(skb, len: 2);
2944	memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2945	/*
2946	* Maybe we could actually set some fields here, for now just
2947	* initialise to zero to indicate no special operation.
2948	*/
2949	*qos_control = 0;
2950	} else
2951	memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2952
2953	skb_reset_mac_header(skb);
2954
2955	info = IEEE80211_SKB_CB(skb);
2956	memset(info, 0, sizeof(*info));
2957
2958	info->flags = info_flags;
2959	if (info_id) {
2960	info->status_data = info_id;
2961	info->status_data_idr = 1;
2962	}
2963	info->band = band;
2964
2965	if (likely(!cookie)) {
2966	ctrl_flags |= u32_encode_bits(v: link_id,
2967	field: IEEE80211_TX_CTRL_MLO_LINK);
2968	} else {
2969	unsigned int pre_conf_link_id;
2970
2971	/*
2972	* ctrl_flags already have been set by
2973	* ieee80211_tx_control_port(), here
2974	* we just sanity check that
2975	*/
2976
2977	pre_conf_link_id = u32_get_bits(v: ctrl_flags,
2978	field: IEEE80211_TX_CTRL_MLO_LINK);
2979
2980	if (pre_conf_link_id != link_id &&
2981	link_id != IEEE80211_LINK_UNSPECIFIED) {
2982	#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2983	net_info_ratelimited("%s: dropped frame to %pM with bad link ID request (%d vs. %d)\n",
2984	sdata->name, hdr.addr1,
2985	pre_conf_link_id, link_id);
2986	#endif
2987	ret = -EINVAL;
2988	goto free;
2989	}
2990	}
2991
2992	info->control.flags = ctrl_flags;
2993
2994	return skb;
2995	free:
2996	kfree_skb(skb);
2997	return ERR_PTR(error: ret);
2998	}
2999
3000	/*
3001	* fast-xmit overview
3002	*
3003	* The core idea of this fast-xmit is to remove per-packet checks by checking
3004	* them out of band. ieee80211_check_fast_xmit() implements the out-of-band
3005	* checks that are needed to get the sta->fast_tx pointer assigned, after which
3006	* much less work can be done per packet. For example, fragmentation must be
3007	* disabled or the fast_tx pointer will not be set. All the conditions are seen
3008	* in the code here.
3009	*
3010	* Once assigned, the fast_tx data structure also caches the per-packet 802.11
3011	* header and other data to aid packet processing in ieee80211_xmit_fast().
3012	*
3013	* The most difficult part of this is that when any of these assumptions
3014	* change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
3015	* ieee80211_check_fast_xmit() or friends) is required to reset the data,
3016	* since the per-packet code no longer checks the conditions. This is reflected
3017	* by the calls to these functions throughout the rest of the code, and must be
3018	* maintained if any of the TX path checks change.
3019	*/
3020
3021	void ieee80211_check_fast_xmit(struct sta_info *sta)
3022	{
3023	struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
3024	struct ieee80211_local *local = sta->local;
3025	struct ieee80211_sub_if_data *sdata = sta->sdata;
3026	struct ieee80211_hdr *hdr = (void *)build.hdr;
3027	struct ieee80211_chanctx_conf *chanctx_conf;
3028	__le16 fc;
3029
3030	if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
3031	return;
3032
3033	if (ieee80211_vif_is_mesh(vif: &sdata->vif))
3034	mesh_fast_tx_flush_sta(sdata, sta);
3035
3036	/* Locking here protects both the pointer itself, and against concurrent
3037	* invocations winning data access races to, e.g., the key pointer that
3038	* is used.
3039	* Without it, the invocation of this function right after the key
3040	* pointer changes wouldn't be sufficient, as another CPU could access
3041	* the pointer, then stall, and then do the cache update after the CPU
3042	* that invalidated the key.
3043	* With the locking, such scenarios cannot happen as the check for the
3044	* key and the fast-tx assignment are done atomically, so the CPU that
3045	* modifies the key will either wait or other one will see the key
3046	* cleared/changed already.
3047	*/
3048	spin_lock_bh(lock: &sta->lock);
3049	if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
3050	!ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
3051	sdata->vif.type == NL80211_IFTYPE_STATION)
3052	goto out;
3053
3054	if (!test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED) || !sta->uploaded)
3055	goto out;
3056
3057	if (test_sta_flag(sta, flag: WLAN_STA_PS_STA) ||
3058	test_sta_flag(sta, flag: WLAN_STA_PS_DRIVER) ||
3059	test_sta_flag(sta, flag: WLAN_STA_PS_DELIVER) ||
3060	test_sta_flag(sta, flag: WLAN_STA_CLEAR_PS_FILT))
3061	goto out;
3062
3063	if (sdata->noack_map)
3064	goto out;
3065
3066	/* fast-xmit doesn't handle fragmentation at all */
3067	if (local->hw.wiphy->frag_threshold != (u32)-1 &&
3068	!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
3069	goto out;
3070
3071	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
3072	rcu_read_lock();
3073	chanctx_conf =
3074	rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
3075	if (!chanctx_conf) {
3076	rcu_read_unlock();
3077	goto out;
3078	}
3079	build.band = chanctx_conf->def.chan->band;
3080	rcu_read_unlock();
3081	} else {
3082	/* MLD transmissions must not rely on the band */
3083	build.band = 0;
3084	}
3085
3086	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
3087
3088	switch (sdata->vif.type) {
3089	case NL80211_IFTYPE_ADHOC:
3090	/* DA SA BSSID */
3091	build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3092	build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3093	memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
3094	build.hdr_len = 24;
3095	break;
3096	case NL80211_IFTYPE_STATION:
3097	if (test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER)) {
3098	/* For TDLS only one link can be valid with peer STA */
3099	int tdls_link_id = sta->sta.valid_links ?
3100	__ffs(sta->sta.valid_links) : 0;
3101	struct ieee80211_link_data *link;
3102
3103	/* DA SA BSSID */
3104	build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3105	build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3106	rcu_read_lock();
3107	link = rcu_dereference(sdata->link[tdls_link_id]);
3108	if (!WARN_ON_ONCE(!link))
3109	memcpy(hdr->addr3, link->u.mgd.bssid, ETH_ALEN);
3110	rcu_read_unlock();
3111	build.hdr_len = 24;
3112	break;
3113	}
3114
3115	if (sdata->u.mgd.use_4addr) {
3116	/* non-regular ethertype cannot use the fastpath */
3117	fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3118	IEEE80211_FCTL_TODS);
3119	/* RA TA DA SA */
3120	memcpy(hdr->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
3121	memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3122	build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3123	build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3124	build.hdr_len = 30;
3125	break;
3126	}
3127	fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
3128	/* BSSID SA DA */
3129	memcpy(hdr->addr1, sdata->vif.cfg.ap_addr, ETH_ALEN);
3130	build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3131	build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3132	build.hdr_len = 24;
3133	break;
3134	case NL80211_IFTYPE_AP_VLAN:
3135	if (sdata->wdev.use_4addr) {
3136	fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3137	IEEE80211_FCTL_TODS);
3138	/* RA TA DA SA */
3139	memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
3140	memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3141	build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3142	build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3143	build.hdr_len = 30;
3144	break;
3145	}
3146	fallthrough;
3147	case NL80211_IFTYPE_AP:
3148	fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3149	/* DA BSSID SA */
3150	build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3151	if (sta->sta.mlo || !ieee80211_vif_is_mld(vif: &sdata->vif)) {
3152	memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3153	} else {
3154	unsigned int link_id = sta->deflink.link_id;
3155	struct ieee80211_link_data *link;
3156
3157	rcu_read_lock();
3158	link = rcu_dereference(sdata->link[link_id]);
3159	if (WARN_ON(!link)) {
3160	rcu_read_unlock();
3161	goto out;
3162	}
3163	memcpy(hdr->addr2, link->conf->addr, ETH_ALEN);
3164	rcu_read_unlock();
3165	}
3166	build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3167	build.hdr_len = 24;
3168	break;
3169	default:
3170	/* not handled on fast-xmit */
3171	goto out;
3172	}
3173
3174	if (sta->sta.wme) {
3175	build.hdr_len += 2;
3176	fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3177	}
3178
3179	/* We store the key here so there's no point in using rcu_dereference()
3180	* but that's fine because the code that changes the pointers will call
3181	* this function after doing so. For a single CPU that would be enough,
3182	* for multiple see the comment above.
3183	*/
3184	build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3185	if (!build.key)
3186	build.key = rcu_access_pointer(sdata->default_unicast_key);
3187	if (build.key) {
3188	bool gen_iv, iv_spc, mmic;
3189
3190	gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3191	iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3192	mmic = build.key->conf.flags &
3193	(IEEE80211_KEY_FLAG_GENERATE_MMIC |
3194	IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3195
3196	/* don't handle software crypto */
3197	if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3198	goto out;
3199
3200	/* Key is being removed */
3201	if (build.key->flags & KEY_FLAG_TAINTED)
3202	goto out;
3203
3204	switch (build.key->conf.cipher) {
3205	case WLAN_CIPHER_SUITE_CCMP:
3206	case WLAN_CIPHER_SUITE_CCMP_256:
3207	if (gen_iv)
3208	build.pn_offs = build.hdr_len;
3209	if (gen_iv || iv_spc)
3210	build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3211	break;
3212	case WLAN_CIPHER_SUITE_GCMP:
3213	case WLAN_CIPHER_SUITE_GCMP_256:
3214	if (gen_iv)
3215	build.pn_offs = build.hdr_len;
3216	if (gen_iv || iv_spc)
3217	build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3218	break;
3219	case WLAN_CIPHER_SUITE_TKIP:
3220	/* cannot handle MMIC or IV generation in xmit-fast */
3221	if (mmic || gen_iv)
3222	goto out;
3223	if (iv_spc)
3224	build.hdr_len += IEEE80211_TKIP_IV_LEN;
3225	break;
3226	case WLAN_CIPHER_SUITE_WEP40:
3227	case WLAN_CIPHER_SUITE_WEP104:
3228	/* cannot handle IV generation in fast-xmit */
3229	if (gen_iv)
3230	goto out;
3231	if (iv_spc)
3232	build.hdr_len += IEEE80211_WEP_IV_LEN;
3233	break;
3234	case WLAN_CIPHER_SUITE_AES_CMAC:
3235	case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3236	case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3237	case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3238	WARN(1,
3239	"management cipher suite 0x%x enabled for data\n",
3240	build.key->conf.cipher);
3241	goto out;
3242	default:
3243	/* we don't know how to generate IVs for this at all */
3244	if (WARN_ON(gen_iv))
3245	goto out;
3246	}
3247
3248	fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3249	}
3250
3251	hdr->frame_control = fc;
3252
3253	memcpy(build.hdr + build.hdr_len,
3254	rfc1042_header, sizeof(rfc1042_header));
3255	build.hdr_len += sizeof(rfc1042_header);
3256
3257	fast_tx = kmemdup(p: &build, size: sizeof(build), GFP_ATOMIC);
3258	/* if the kmemdup fails, continue w/o fast_tx */
3259
3260	out:
3261	/* we might have raced against another call to this function */
3262	old = rcu_dereference_protected(sta->fast_tx,
3263	lockdep_is_held(&sta->lock));
3264	rcu_assign_pointer(sta->fast_tx, fast_tx);
3265	if (old)
3266	kfree_rcu(old, rcu_head);
3267	spin_unlock_bh(lock: &sta->lock);
3268	}
3269
3270	void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3271	{
3272	struct sta_info *sta;
3273
3274	rcu_read_lock();
3275	list_for_each_entry_rcu(sta, &local->sta_list, list)
3276	ieee80211_check_fast_xmit(sta);
3277	rcu_read_unlock();
3278	}
3279
3280	void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3281	{
3282	struct ieee80211_local *local = sdata->local;
3283	struct sta_info *sta;
3284
3285	rcu_read_lock();
3286
3287	list_for_each_entry_rcu(sta, &local->sta_list, list) {
3288	if (sdata != sta->sdata &&
3289	(!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3290	continue;
3291	ieee80211_check_fast_xmit(sta);
3292	}
3293
3294	rcu_read_unlock();
3295	}
3296
3297	void ieee80211_clear_fast_xmit(struct sta_info *sta)
3298	{
3299	struct ieee80211_fast_tx *fast_tx;
3300
3301	spin_lock_bh(lock: &sta->lock);
3302	fast_tx = rcu_dereference_protected(sta->fast_tx,
3303	lockdep_is_held(&sta->lock));
3304	RCU_INIT_POINTER(sta->fast_tx, NULL);
3305	spin_unlock_bh(lock: &sta->lock);
3306
3307	if (fast_tx)
3308	kfree_rcu(fast_tx, rcu_head);
3309	}
3310
3311	static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3312	struct sk_buff *skb, int headroom)
3313	{
3314	if (skb_headroom(skb) < headroom) {
3315	I802_DEBUG_INC(local->tx_expand_skb_head);
3316
3317	if (pskb_expand_head(skb, nhead: headroom, ntail: 0, GFP_ATOMIC)) {
3318	wiphy_debug(local->hw.wiphy,
3319	"failed to reallocate TX buffer\n");
3320	return false;
3321	}
3322	}
3323
3324	return true;
3325	}
3326
3327	static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3328	struct ieee80211_fast_tx *fast_tx,
3329	struct sk_buff *skb)
3330	{
3331	struct ieee80211_local *local = sdata->local;
3332	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3333	struct ieee80211_hdr *hdr;
3334	struct ethhdr *amsdu_hdr;
3335	int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3336	int subframe_len = skb->len - hdr_len;
3337	void *data;
3338	u8 *qc, *h_80211_src, *h_80211_dst;
3339	const u8 *bssid;
3340
3341	if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3342	return false;
3343
3344	if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3345	return true;
3346
3347	if (!ieee80211_amsdu_realloc_pad(local, skb,
3348	headroom: sizeof(*amsdu_hdr) +
3349	local->hw.extra_tx_headroom))
3350	return false;
3351
3352	data = skb_push(skb, len: sizeof(*amsdu_hdr));
3353	memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3354	hdr = data;
3355	amsdu_hdr = data + hdr_len;
3356	/* h_80211_src/dst is addr* field within hdr */
3357	h_80211_src = data + fast_tx->sa_offs;
3358	h_80211_dst = data + fast_tx->da_offs;
3359
3360	amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3361	ether_addr_copy(dst: amsdu_hdr->h_source, src: h_80211_src);
3362	ether_addr_copy(dst: amsdu_hdr->h_dest, src: h_80211_dst);
3363
3364	/* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3365	* fields needs to be changed to BSSID for A-MSDU frames depending
3366	* on FromDS/ToDS values.
3367	*/
3368	switch (sdata->vif.type) {
3369	case NL80211_IFTYPE_STATION:
3370	bssid = sdata->vif.cfg.ap_addr;
3371	break;
3372	case NL80211_IFTYPE_AP:
3373	case NL80211_IFTYPE_AP_VLAN:
3374	bssid = sdata->vif.addr;
3375	break;
3376	default:
3377	bssid = NULL;
3378	}
3379
3380	if (bssid && ieee80211_has_fromds(fc: hdr->frame_control))
3381	ether_addr_copy(dst: h_80211_src, src: bssid);
3382
3383	if (bssid && ieee80211_has_tods(fc: hdr->frame_control))
3384	ether_addr_copy(dst: h_80211_dst, src: bssid);
3385
3386	qc = ieee80211_get_qos_ctl(hdr);
3387	*qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3388
3389	info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3390
3391	return true;
3392	}
3393
3394	static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3395	struct sta_info *sta,
3396	struct ieee80211_fast_tx *fast_tx,
3397	struct sk_buff *skb,
3398	const u8 *da, const u8 *sa)
3399	{
3400	struct ieee80211_local *local = sdata->local;
3401	struct fq *fq = &local->fq;
3402	struct fq_tin *tin;
3403	struct fq_flow *flow;
3404	u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3405	struct ieee80211_txq *txq = sta->sta.txq[tid];
3406	struct txq_info *txqi;
3407	struct sk_buff **frag_tail, *head;
3408	int subframe_len = skb->len - ETH_ALEN;
3409	u8 max_subframes = sta->sta.max_amsdu_subframes;
3410	int max_frags = local->hw.max_tx_fragments;
3411	int max_amsdu_len = sta->sta.cur->max_amsdu_len;
3412	int orig_truesize;
3413	u32 flow_idx;
3414	__be16 len;
3415	void *data;
3416	bool ret = false;
3417	unsigned int orig_len;
3418	int n = 2, nfrags, pad = 0;
3419	u16 hdrlen;
3420
3421	if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3422	return false;
3423
3424	if (sdata->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED)
3425	return false;
3426
3427	if (ieee80211_vif_is_mesh(vif: &sdata->vif))
3428	return false;
3429
3430	if (skb_is_gso(skb))
3431	return false;
3432
3433	if (!txq)
3434	return false;
3435
3436	txqi = to_txq_info(txq);
3437	if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3438	return false;
3439
3440	if (sta->sta.cur->max_rc_amsdu_len)
3441	max_amsdu_len = min_t(int, max_amsdu_len,
3442	sta->sta.cur->max_rc_amsdu_len);
3443
3444	if (sta->sta.cur->max_tid_amsdu_len[tid])
3445	max_amsdu_len = min_t(int, max_amsdu_len,
3446	sta->sta.cur->max_tid_amsdu_len[tid]);
3447
3448	flow_idx = fq_flow_idx(fq, skb);
3449
3450	spin_lock_bh(lock: &fq->lock);
3451
3452	/* TODO: Ideally aggregation should be done on dequeue to remain
3453	* responsive to environment changes.
3454	*/
3455
3456	tin = &txqi->tin;
3457	flow = fq_flow_classify(fq, tin, idx: flow_idx, skb);
3458	head = skb_peek_tail(list_: &flow->queue);
3459	if (!head || skb_is_gso(skb: head))
3460	goto out;
3461
3462	orig_truesize = head->truesize;
3463	orig_len = head->len;
3464
3465	if (skb->len + head->len > max_amsdu_len)
3466	goto out;
3467
3468	nfrags = 1 + skb_shinfo(skb)->nr_frags;
3469	nfrags += 1 + skb_shinfo(head)->nr_frags;
3470	frag_tail = &skb_shinfo(head)->frag_list;
3471	while (*frag_tail) {
3472	nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3473	frag_tail = &(*frag_tail)->next;
3474	n++;
3475	}
3476
3477	if (max_subframes && n > max_subframes)
3478	goto out;
3479
3480	if (max_frags && nfrags > max_frags)
3481	goto out;
3482
3483	if (!drv_can_aggregate_in_amsdu(local, head, skb))
3484	goto out;
3485
3486	if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, skb: head))
3487	goto out;
3488
3489	/* If n == 2, the "while (*frag_tail)" loop above didn't execute
3490	* and frag_tail should be &skb_shinfo(head)->frag_list.
3491	* However, ieee80211_amsdu_prepare_head() can reallocate it.
3492	* Reload frag_tail to have it pointing to the correct place.
3493	*/
3494	if (n == 2)
3495	frag_tail = &skb_shinfo(head)->frag_list;
3496
3497	/*
3498	* Pad out the previous subframe to a multiple of 4 by adding the
3499	* padding to the next one, that's being added. Note that head->len
3500	* is the length of the full A-MSDU, but that works since each time
3501	* we add a new subframe we pad out the previous one to a multiple
3502	* of 4 and thus it no longer matters in the next round.
3503	*/
3504	hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3505	if ((head->len - hdrlen) & 3)
3506	pad = 4 - ((head->len - hdrlen) & 3);
3507
3508	if (!ieee80211_amsdu_realloc_pad(local, skb, headroom: sizeof(rfc1042_header) +
3509	2 + pad))
3510	goto out_recalc;
3511
3512	ret = true;
3513	data = skb_push(skb, ETH_ALEN + 2);
3514	ether_addr_copy(dst: data, src: da);
3515	ether_addr_copy(dst: data + ETH_ALEN, src: sa);
3516
3517	data += 2 * ETH_ALEN;
3518	len = cpu_to_be16(subframe_len);
3519	memcpy(data, &len, 2);
3520	memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3521
3522	memset(skb_push(skb, pad), 0, pad);
3523
3524	head->len += skb->len;
3525	head->data_len += skb->len;
3526	*frag_tail = skb;
3527
3528	out_recalc:
3529	fq->memory_usage += head->truesize - orig_truesize;
3530	if (head->len != orig_len) {
3531	flow->backlog += head->len - orig_len;
3532	tin->backlog_bytes += head->len - orig_len;
3533	}
3534	out:
3535	spin_unlock_bh(lock: &fq->lock);
3536
3537	return ret;
3538	}
3539
3540	/*
3541	* Can be called while the sta lock is held. Anything that can cause packets to
3542	* be generated will cause deadlock!
3543	*/
3544	static ieee80211_tx_result
3545	ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3546	struct sta_info *sta, u8 pn_offs,
3547	struct ieee80211_key *key,
3548	struct ieee80211_tx_data *tx)
3549	{
3550	struct sk_buff *skb = tx->skb;
3551	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3552	struct ieee80211_hdr *hdr = (void *)skb->data;
3553	u8 tid = IEEE80211_NUM_TIDS;
3554
3555	if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) &&
3556	ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE)
3557	return TX_DROP;
3558
3559	if (key)
3560	info->control.hw_key = &key->conf;
3561
3562	dev_sw_netstats_tx_add(dev: skb->dev, packets: 1, len: skb->len);
3563
3564	if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3565	tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3566	hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3567	} else {
3568	info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3569	hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3570	sdata->sequence_number += 0x10;
3571	}
3572
3573	if (skb_shinfo(skb)->gso_size)
3574	sta->deflink.tx_stats.msdu[tid] +=
3575	DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3576	else
3577	sta->deflink.tx_stats.msdu[tid]++;
3578
3579	info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3580
3581	/* statistics normally done by ieee80211_tx_h_stats (but that
3582	* has to consider fragmentation, so is more complex)
3583	*/
3584	sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3585	sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++;
3586
3587	if (pn_offs) {
3588	u64 pn;
3589	u8 *crypto_hdr = skb->data + pn_offs;
3590
3591	switch (key->conf.cipher) {
3592	case WLAN_CIPHER_SUITE_CCMP:
3593	case WLAN_CIPHER_SUITE_CCMP_256:
3594	case WLAN_CIPHER_SUITE_GCMP:
3595	case WLAN_CIPHER_SUITE_GCMP_256:
3596	pn = atomic64_inc_return(v: &key->conf.tx_pn);
3597	crypto_hdr[0] = pn;
3598	crypto_hdr[1] = pn >> 8;
3599	crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3600	crypto_hdr[4] = pn >> 16;
3601	crypto_hdr[5] = pn >> 24;
3602	crypto_hdr[6] = pn >> 32;
3603	crypto_hdr[7] = pn >> 40;
3604	break;
3605	}
3606	}
3607
3608	return TX_CONTINUE;
3609	}
3610
3611	static netdev_features_t
3612	ieee80211_sdata_netdev_features(struct ieee80211_sub_if_data *sdata)
3613	{
3614	if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
3615	return sdata->vif.netdev_features;
3616
3617	if (!sdata->bss)
3618	return 0;
3619
3620	sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
3621	return sdata->vif.netdev_features;
3622	}
3623
3624	static struct sk_buff *
3625	ieee80211_tx_skb_fixup(struct sk_buff *skb, netdev_features_t features)
3626	{
3627	if (skb_is_gso(skb)) {
3628	struct sk_buff *segs;
3629
3630	segs = skb_gso_segment(skb, features);
3631	if (!segs)
3632	return skb;
3633	if (IS_ERR(ptr: segs))
3634	goto free;
3635
3636	consume_skb(skb);
3637	return segs;
3638	}
3639
3640	if (skb_needs_linearize(skb, features) && __skb_linearize(skb))
3641	goto free;
3642
3643	if (skb->ip_summed == CHECKSUM_PARTIAL) {
3644	int ofs = skb_checksum_start_offset(skb);
3645
3646	if (skb->encapsulation)
3647	skb_set_inner_transport_header(skb, offset: ofs);
3648	else
3649	skb_set_transport_header(skb, offset: ofs);
3650
3651	if (skb_csum_hwoffload_help(skb, features))
3652	goto free;
3653	}
3654
3655	skb_mark_not_on_list(skb);
3656	return skb;
3657
3658	free:
3659	kfree_skb(skb);
3660	return NULL;
3661	}
3662
3663	void __ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3664	struct sta_info *sta,
3665	struct ieee80211_fast_tx *fast_tx,
3666	struct sk_buff *skb, bool ampdu,
3667	const u8 *da, const u8 *sa)
3668	{
3669	struct ieee80211_local *local = sdata->local;
3670	struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3671	struct ieee80211_tx_info *info;
3672	struct ieee80211_tx_data tx;
3673	ieee80211_tx_result r;
3674	int hw_headroom = sdata->local->hw.extra_tx_headroom;
3675	int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3676
3677	skb = skb_share_check(skb, GFP_ATOMIC);
3678	if (unlikely(!skb))
3679	return;
3680
3681	if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3682	ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb, da, sa))
3683	return;
3684
3685	/* will not be crypto-handled beyond what we do here, so use false
3686	* as the may-encrypt argument for the resize to not account for
3687	* more room than we already have in 'extra_head'
3688	*/
3689	if (unlikely(ieee80211_skb_resize(sdata, skb,
3690	max_t(int, extra_head + hw_headroom -
3691	skb_headroom(skb), 0),
3692	ENCRYPT_NO)))
3693	goto free;
3694
3695	hdr = skb_push(skb, len: extra_head);
3696	memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3697	memcpy(skb->data + fast_tx->da_offs, da, ETH_ALEN);
3698	memcpy(skb->data + fast_tx->sa_offs, sa, ETH_ALEN);
3699
3700	info = IEEE80211_SKB_CB(skb);
3701	memset(info, 0, sizeof(*info));
3702	info->band = fast_tx->band;
3703	info->control.vif = &sdata->vif;
3704	info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3705	IEEE80211_TX_CTL_DONTFRAG;
3706	info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT |
3707	u32_encode_bits(IEEE80211_LINK_UNSPECIFIED,
3708	field: IEEE80211_TX_CTRL_MLO_LINK);
3709
3710	#ifdef CONFIG_MAC80211_DEBUGFS
3711	if (local->force_tx_status)
3712	info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3713	#endif
3714
3715	if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3716	u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3717
3718	*ieee80211_get_qos_ctl(hdr) = tid;
3719	}
3720
3721	__skb_queue_head_init(list: &tx.skbs);
3722
3723	tx.flags = IEEE80211_TX_UNICAST;
3724	tx.local = local;
3725	tx.sdata = sdata;
3726	tx.sta = sta;
3727	tx.key = fast_tx->key;
3728
3729	if (ieee80211_queue_skb(local, sdata, sta, skb))
3730	return;
3731
3732	tx.skb = skb;
3733	r = ieee80211_xmit_fast_finish(sdata, sta, pn_offs: fast_tx->pn_offs,
3734	key: fast_tx->key, tx: &tx);
3735	tx.skb = NULL;
3736	if (r == TX_DROP)
3737	goto free;
3738
3739	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3740	sdata = container_of(sdata->bss,
3741	struct ieee80211_sub_if_data, u.ap);
3742
3743	__skb_queue_tail(list: &tx.skbs, newsk: skb);
3744	ieee80211_tx_frags(local, vif: &sdata->vif, sta, skbs: &tx.skbs, txpending: false);
3745	return;
3746
3747	free:
3748	kfree_skb(skb);
3749	}
3750
3751	static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3752	struct sta_info *sta,
3753	struct ieee80211_fast_tx *fast_tx,
3754	struct sk_buff *skb)
3755	{
3756	u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3757	struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3758	struct tid_ampdu_tx *tid_tx = NULL;
3759	struct sk_buff *next;
3760	struct ethhdr eth;
3761	u8 tid = IEEE80211_NUM_TIDS;
3762
3763	/* control port protocol needs a lot of special handling */
3764	if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3765	return false;
3766
3767	/* only RFC 1042 SNAP */
3768	if (ethertype < ETH_P_802_3_MIN)
3769	return false;
3770
3771	/* don't handle TX status request here either */
3772	if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3773	return false;
3774
3775	if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3776	tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3777	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3778	if (tid_tx) {
3779	if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3780	return false;
3781	if (tid_tx->timeout)
3782	tid_tx->last_tx = jiffies;
3783	}
3784	}
3785
3786	memcpy(&eth, skb->data, ETH_HLEN - 2);
3787
3788	/* after this point (skb is modified) we cannot return false */
3789	skb = ieee80211_tx_skb_fixup(skb, features: ieee80211_sdata_netdev_features(sdata));
3790	if (!skb)
3791	return true;
3792
3793	skb_list_walk_safe(skb, skb, next) {
3794	skb_mark_not_on_list(skb);
3795	__ieee80211_xmit_fast(sdata, sta, fast_tx, skb, ampdu: tid_tx,
3796	da: eth.h_dest, sa: eth.h_source);
3797	}
3798
3799	return true;
3800	}
3801
3802	struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3803	struct ieee80211_txq *txq)
3804	{
3805	struct ieee80211_local *local = hw_to_local(hw);
3806	struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3807	struct ieee80211_hdr *hdr;
3808	struct sk_buff *skb = NULL;
3809	struct fq *fq = &local->fq;
3810	struct fq_tin *tin = &txqi->tin;
3811	struct ieee80211_tx_info *info;
3812	struct ieee80211_tx_data tx;
3813	ieee80211_tx_result r;
3814	struct ieee80211_vif *vif = txq->vif;
3815	int q = vif->hw_queue[txq->ac];
3816	unsigned long flags;
3817	bool q_stopped;
3818
3819	WARN_ON_ONCE(softirq_count() == 0);
3820
3821	if (!ieee80211_txq_airtime_check(hw, txq))
3822	return NULL;
3823
3824	begin:
3825	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3826	q_stopped = local->queue_stop_reasons[q];
3827	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
3828
3829	if (unlikely(q_stopped)) {
3830	/* mark for waking later */
3831	set_bit(nr: IEEE80211_TXQ_DIRTY, addr: &txqi->flags);
3832	return NULL;
3833	}
3834
3835	spin_lock_bh(lock: &fq->lock);
3836
3837	/* Make sure fragments stay together. */
3838	skb = __skb_dequeue(list: &txqi->frags);
3839	if (unlikely(skb)) {
3840	if (!(IEEE80211_SKB_CB(skb)->control.flags &
3841	IEEE80211_TX_INTCFL_NEED_TXPROCESSING))
3842	goto out;
3843	IEEE80211_SKB_CB(skb)->control.flags &=
3844	~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
3845	} else {
3846	if (unlikely(test_bit(IEEE80211_TXQ_STOP, &txqi->flags)))
3847	goto out;
3848
3849	skb = fq_tin_dequeue(fq, tin, dequeue_func: fq_tin_dequeue_func);
3850	}
3851
3852	if (!skb)
3853	goto out;
3854
3855	spin_unlock_bh(lock: &fq->lock);
3856
3857	hdr = (struct ieee80211_hdr *)skb->data;
3858	info = IEEE80211_SKB_CB(skb);
3859
3860	memset(&tx, 0, sizeof(tx));
3861	__skb_queue_head_init(list: &tx.skbs);
3862	tx.local = local;
3863	tx.skb = skb;
3864	tx.sdata = vif_to_sdata(p: info->control.vif);
3865
3866	if (txq->sta) {
3867	tx.sta = container_of(txq->sta, struct sta_info, sta);
3868	/*
3869	* Drop unicast frames to unauthorised stations unless they are
3870	* injected frames or EAPOL frames from the local station.
3871	*/
3872	if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3873	ieee80211_is_data(hdr->frame_control) &&
3874	!ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3875	tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3876	!is_multicast_ether_addr(hdr->addr1) &&
3877	!test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3878	(!(info->control.flags &
3879	IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3880	!ieee80211_is_our_addr(tx.sdata, hdr->addr2,
3881	NULL)))) {
3882	I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3883	ieee80211_free_txskb(hw: &local->hw, skb);
3884	goto begin;
3885	}
3886	}
3887
3888	/*
3889	* The key can be removed while the packet was queued, so need to call
3890	* this here to get the current key.
3891	*/
3892	r = ieee80211_tx_h_select_key(tx: &tx);
3893	if (r != TX_CONTINUE) {
3894	ieee80211_free_txskb(hw: &local->hw, skb);
3895	goto begin;
3896	}
3897
3898	if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3899	info->flags |= (IEEE80211_TX_CTL_AMPDU |
3900	IEEE80211_TX_CTL_DONTFRAG);
3901
3902	if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
3903	if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3904	r = ieee80211_tx_h_rate_ctrl(tx: &tx);
3905	if (r != TX_CONTINUE) {
3906	ieee80211_free_txskb(hw: &local->hw, skb);
3907	goto begin;
3908	}
3909	}
3910	goto encap_out;
3911	}
3912
3913	if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3914	struct sta_info *sta = container_of(txq->sta, struct sta_info,
3915	sta);
3916	u8 pn_offs = 0;
3917
3918	if (tx.key &&
3919	(tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3920	pn_offs = ieee80211_hdrlen(fc: hdr->frame_control);
3921
3922	r = ieee80211_xmit_fast_finish(sdata: sta->sdata, sta, pn_offs,
3923	key: tx.key, tx: &tx);
3924	if (r != TX_CONTINUE) {
3925	ieee80211_free_txskb(hw: &local->hw, skb);
3926	goto begin;
3927	}
3928	} else {
3929	if (invoke_tx_handlers_late(tx: &tx))
3930	goto begin;
3931
3932	skb = __skb_dequeue(list: &tx.skbs);
3933	info = IEEE80211_SKB_CB(skb);
3934
3935	if (!skb_queue_empty(list: &tx.skbs)) {
3936	spin_lock_bh(lock: &fq->lock);
3937	skb_queue_splice_tail(list: &tx.skbs, head: &txqi->frags);
3938	spin_unlock_bh(lock: &fq->lock);
3939	}
3940	}
3941
3942	if (skb_has_frag_list(skb) &&
3943	!ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3944	if (skb_linearize(skb)) {
3945	ieee80211_free_txskb(hw: &local->hw, skb);
3946	goto begin;
3947	}
3948	}
3949
3950	switch (tx.sdata->vif.type) {
3951	case NL80211_IFTYPE_MONITOR:
3952	if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3953	vif = &tx.sdata->vif;
3954	break;
3955	}
3956	tx.sdata = rcu_dereference(local->monitor_sdata);
3957	if (tx.sdata) {
3958	vif = &tx.sdata->vif;
3959	info->hw_queue =
3960	vif->hw_queue[skb_get_queue_mapping(skb)];
3961	} else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3962	ieee80211_free_txskb(hw: &local->hw, skb);
3963	goto begin;
3964	} else {
3965	info->control.vif = NULL;
3966	return skb;
3967	}
3968	break;
3969	case NL80211_IFTYPE_AP_VLAN:
3970	tx.sdata = container_of(tx.sdata->bss,
3971	struct ieee80211_sub_if_data, u.ap);
3972	fallthrough;
3973	default:
3974	vif = &tx.sdata->vif;
3975	break;
3976	}
3977
3978	encap_out:
3979	info->control.vif = vif;
3980
3981	if (tx.sta &&
3982	wiphy_ext_feature_isset(wiphy: local->hw.wiphy, ftidx: NL80211_EXT_FEATURE_AQL)) {
3983	bool ampdu = txq->ac != IEEE80211_AC_VO;
3984	u32 airtime;
3985
3986	airtime = ieee80211_calc_expected_tx_airtime(hw, vif, pubsta: txq->sta,
3987	len: skb->len, ampdu);
3988	if (airtime) {
3989	airtime = ieee80211_info_set_tx_time_est(info, tx_time_est: airtime);
3990	ieee80211_sta_update_pending_airtime(local, sta: tx.sta,
3991	ac: txq->ac,
3992	tx_airtime: airtime,
3993	tx_completed: false);
3994	}
3995	}
3996
3997	return skb;
3998
3999	out:
4000	spin_unlock_bh(lock: &fq->lock);
4001
4002	return skb;
4003	}
4004	EXPORT_SYMBOL(ieee80211_tx_dequeue);
4005
4006	static inline s32 ieee80211_sta_deficit(struct sta_info *sta, u8 ac)
4007	{
4008	struct airtime_info *air_info = &sta->airtime[ac];
4009
4010	return air_info->deficit - atomic_read(v: &air_info->aql_tx_pending);
4011	}
4012
4013	static void
4014	ieee80211_txq_set_active(struct txq_info *txqi)
4015	{
4016	struct sta_info *sta;
4017
4018	if (!txqi->txq.sta)
4019	return;
4020
4021	sta = container_of(txqi->txq.sta, struct sta_info, sta);
4022	sta->airtime[txqi->txq.ac].last_active = jiffies;
4023	}
4024
4025	static bool
4026	ieee80211_txq_keep_active(struct txq_info *txqi)
4027	{
4028	struct sta_info *sta;
4029
4030	if (!txqi->txq.sta)
4031	return false;
4032
4033	sta = container_of(txqi->txq.sta, struct sta_info, sta);
4034	if (ieee80211_sta_deficit(sta, ac: txqi->txq.ac) >= 0)
4035	return false;
4036
4037	return ieee80211_sta_keep_active(sta, ac: txqi->txq.ac);
4038	}
4039
4040	struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
4041	{
4042	struct ieee80211_local *local = hw_to_local(hw);
4043	struct ieee80211_txq *ret = NULL;
4044	struct txq_info *txqi = NULL, *head = NULL;
4045	bool found_eligible_txq = false;
4046
4047	spin_lock_bh(lock: &local->active_txq_lock[ac]);
4048
4049	if (!local->schedule_round[ac])
4050	goto out;
4051
4052	begin:
4053	txqi = list_first_entry_or_null(&local->active_txqs[ac],
4054	struct txq_info,
4055	schedule_order);
4056	if (!txqi)
4057	goto out;
4058
4059	if (txqi == head) {
4060	if (!found_eligible_txq)
4061	goto out;
4062	else
4063	found_eligible_txq = false;
4064	}
4065
4066	if (!head)
4067	head = txqi;
4068
4069	if (txqi->txq.sta) {
4070	struct sta_info *sta = container_of(txqi->txq.sta,
4071	struct sta_info, sta);
4072	bool aql_check = ieee80211_txq_airtime_check(hw, txq: &txqi->txq);
4073	s32 deficit = ieee80211_sta_deficit(sta, ac: txqi->txq.ac);
4074
4075	if (aql_check)
4076	found_eligible_txq = true;
4077
4078	if (deficit < 0)
4079	sta->airtime[txqi->txq.ac].deficit +=
4080	sta->airtime_weight;
4081
4082	if (deficit < 0 || !aql_check) {
4083	list_move_tail(list: &txqi->schedule_order,
4084	head: &local->active_txqs[txqi->txq.ac]);
4085	goto begin;
4086	}
4087	}
4088
4089	if (txqi->schedule_round == local->schedule_round[ac])
4090	goto out;
4091
4092	list_del_init(entry: &txqi->schedule_order);
4093	txqi->schedule_round = local->schedule_round[ac];
4094	ret = &txqi->txq;
4095
4096	out:
4097	spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4098	return ret;
4099	}
4100	EXPORT_SYMBOL(ieee80211_next_txq);
4101
4102	void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
4103	struct ieee80211_txq *txq,
4104	bool force)
4105	{
4106	struct ieee80211_local *local = hw_to_local(hw);
4107	struct txq_info *txqi = to_txq_info(txq);
4108	bool has_queue;
4109
4110	spin_lock_bh(lock: &local->active_txq_lock[txq->ac]);
4111
4112	has_queue = force || txq_has_queue(txq);
4113	if (list_empty(head: &txqi->schedule_order) &&
4114	(has_queue || ieee80211_txq_keep_active(txqi))) {
4115	/* If airtime accounting is active, always enqueue STAs at the
4116	* head of the list to ensure that they only get moved to the
4117	* back by the airtime DRR scheduler once they have a negative
4118	* deficit. A station that already has a negative deficit will
4119	* get immediately moved to the back of the list on the next
4120	* call to ieee80211_next_txq().
4121	*/
4122	if (txqi->txq.sta && local->airtime_flags && has_queue &&
4123	wiphy_ext_feature_isset(wiphy: local->hw.wiphy,
4124	ftidx: NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
4125	list_add(new: &txqi->schedule_order,
4126	head: &local->active_txqs[txq->ac]);
4127	else
4128	list_add_tail(new: &txqi->schedule_order,
4129	head: &local->active_txqs[txq->ac]);
4130	if (has_queue)
4131	ieee80211_txq_set_active(txqi);
4132	}
4133
4134	spin_unlock_bh(lock: &local->active_txq_lock[txq->ac]);
4135	}
4136	EXPORT_SYMBOL(__ieee80211_schedule_txq);
4137
4138	DEFINE_STATIC_KEY_FALSE(aql_disable);
4139
4140	bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
4141	struct ieee80211_txq *txq)
4142	{
4143	struct sta_info *sta;
4144	struct ieee80211_local *local = hw_to_local(hw);
4145
4146	if (!wiphy_ext_feature_isset(wiphy: local->hw.wiphy, ftidx: NL80211_EXT_FEATURE_AQL))
4147	return true;
4148
4149	if (static_branch_unlikely(&aql_disable))
4150	return true;
4151
4152	if (!txq->sta)
4153	return true;
4154
4155	if (unlikely(txq->tid == IEEE80211_NUM_TIDS))
4156	return true;
4157
4158	sta = container_of(txq->sta, struct sta_info, sta);
4159	if (atomic_read(v: &sta->airtime[txq->ac].aql_tx_pending) <
4160	sta->airtime[txq->ac].aql_limit_low)
4161	return true;
4162
4163	if (atomic_read(v: &local->aql_total_pending_airtime) <
4164	local->aql_threshold &&
4165	atomic_read(v: &sta->airtime[txq->ac].aql_tx_pending) <
4166	sta->airtime[txq->ac].aql_limit_high)
4167	return true;
4168
4169	return false;
4170	}
4171	EXPORT_SYMBOL(ieee80211_txq_airtime_check);
4172
4173	static bool
4174	ieee80211_txq_schedule_airtime_check(struct ieee80211_local *local, u8 ac)
4175	{
4176	unsigned int num_txq = 0;
4177	struct txq_info *txq;
4178	u32 aql_limit;
4179
4180	if (!wiphy_ext_feature_isset(wiphy: local->hw.wiphy, ftidx: NL80211_EXT_FEATURE_AQL))
4181	return true;
4182
4183	list_for_each_entry(txq, &local->active_txqs[ac], schedule_order)
4184	num_txq++;
4185
4186	aql_limit = (num_txq - 1) * local->aql_txq_limit_low[ac] / 2 +
4187	local->aql_txq_limit_high[ac];
4188
4189	return atomic_read(v: &local->aql_ac_pending_airtime[ac]) < aql_limit;
4190	}
4191
4192	bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
4193	struct ieee80211_txq *txq)
4194	{
4195	struct ieee80211_local *local = hw_to_local(hw);
4196	struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
4197	struct sta_info *sta;
4198	u8 ac = txq->ac;
4199
4200	spin_lock_bh(lock: &local->active_txq_lock[ac]);
4201
4202	if (!txqi->txq.sta)
4203	goto out;
4204
4205	if (list_empty(head: &txqi->schedule_order))
4206	goto out;
4207
4208	if (!ieee80211_txq_schedule_airtime_check(local, ac))
4209	goto out;
4210
4211	list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
4212	schedule_order) {
4213	if (iter == txqi)
4214	break;
4215
4216	if (!iter->txq.sta) {
4217	list_move_tail(list: &iter->schedule_order,
4218	head: &local->active_txqs[ac]);
4219	continue;
4220	}
4221	sta = container_of(iter->txq.sta, struct sta_info, sta);
4222	if (ieee80211_sta_deficit(sta, ac) < 0)
4223	sta->airtime[ac].deficit += sta->airtime_weight;
4224	list_move_tail(list: &iter->schedule_order, head: &local->active_txqs[ac]);
4225	}
4226
4227	sta = container_of(txqi->txq.sta, struct sta_info, sta);
4228	if (sta->airtime[ac].deficit >= 0)
4229	goto out;
4230
4231	sta->airtime[ac].deficit += sta->airtime_weight;
4232	list_move_tail(list: &txqi->schedule_order, head: &local->active_txqs[ac]);
4233	spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4234
4235	return false;
4236	out:
4237	if (!list_empty(head: &txqi->schedule_order))
4238	list_del_init(entry: &txqi->schedule_order);
4239	spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4240
4241	return true;
4242	}
4243	EXPORT_SYMBOL(ieee80211_txq_may_transmit);
4244
4245	void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
4246	{
4247	struct ieee80211_local *local = hw_to_local(hw);
4248
4249	spin_lock_bh(lock: &local->active_txq_lock[ac]);
4250
4251	if (ieee80211_txq_schedule_airtime_check(local, ac)) {
4252	local->schedule_round[ac]++;
4253	if (!local->schedule_round[ac])
4254	local->schedule_round[ac]++;
4255	} else {
4256	local->schedule_round[ac] = 0;
4257	}
4258
4259	spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4260	}
4261	EXPORT_SYMBOL(ieee80211_txq_schedule_start);
4262
4263	void __ieee80211_subif_start_xmit(struct sk_buff *skb,
4264	struct net_device *dev,
4265	u32 info_flags,
4266	u32 ctrl_flags,
4267	u64 *cookie)
4268	{
4269	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4270	struct ieee80211_local *local = sdata->local;
4271	struct sta_info *sta;
4272	struct sk_buff *next;
4273	int len = skb->len;
4274
4275	if (unlikely(!ieee80211_sdata_running(sdata) || skb->len < ETH_HLEN)) {
4276	kfree_skb(skb);
4277	return;
4278	}
4279
4280	sk_pacing_shift_update(sk: skb->sk, val: sdata->local->hw.tx_sk_pacing_shift);
4281
4282	rcu_read_lock();
4283
4284	if (ieee80211_vif_is_mesh(vif: &sdata->vif) &&
4285	ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT) &&
4286	ieee80211_mesh_xmit_fast(sdata, skb, ctrl_flags))
4287	goto out;
4288
4289	if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta))
4290	goto out_free;
4291
4292	if (IS_ERR(ptr: sta))
4293	sta = NULL;
4294
4295	skb_set_queue_mapping(skb, queue_mapping: ieee80211_select_queue(sdata, sta, skb));
4296	ieee80211_aggr_check(sdata, sta, skb);
4297
4298	if (sta) {
4299	struct ieee80211_fast_tx *fast_tx;
4300
4301	fast_tx = rcu_dereference(sta->fast_tx);
4302
4303	if (fast_tx &&
4304	ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
4305	goto out;
4306	}
4307
4308	/* the frame could be fragmented, software-encrypted, and other
4309	* things so we cannot really handle checksum or GSO offload.
4310	* fix it up in software before we handle anything else.
4311	*/
4312	skb = ieee80211_tx_skb_fixup(skb, features: 0);
4313	if (!skb) {
4314	len = 0;
4315	goto out;
4316	}
4317
4318	skb_list_walk_safe(skb, skb, next) {
4319	skb_mark_not_on_list(skb);
4320
4321	if (skb->protocol == sdata->control_port_protocol)
4322	ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
4323
4324	skb = ieee80211_build_hdr(sdata, skb, info_flags,
4325	sta, ctrl_flags, cookie);
4326	if (IS_ERR(ptr: skb)) {
4327	kfree_skb_list(segs: next);
4328	goto out;
4329	}
4330
4331	dev_sw_netstats_tx_add(dev, packets: 1, len: skb->len);
4332
4333	ieee80211_xmit(sdata, sta, skb);
4334	}
4335	goto out;
4336	out_free:
4337	kfree_skb(skb);
4338	len = 0;
4339	out:
4340	if (len)
4341	ieee80211_tpt_led_trig_tx(local, bytes: len);
4342	rcu_read_unlock();
4343	}
4344
4345	static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4346	{
4347	struct ethhdr *eth;
4348	int err;
4349
4350	err = skb_ensure_writable(skb, ETH_HLEN);
4351	if (unlikely(err))
4352	return err;
4353
4354	eth = (void *)skb->data;
4355	ether_addr_copy(dst: eth->h_dest, src: sta->sta.addr);
4356
4357	return 0;
4358	}
4359
4360	static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4361	struct net_device *dev)
4362	{
4363	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4364	const struct ethhdr *eth = (void *)skb->data;
4365	const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4366	__be16 ethertype;
4367
4368	switch (sdata->vif.type) {
4369	case NL80211_IFTYPE_AP_VLAN:
4370	if (sdata->u.vlan.sta)
4371	return false;
4372	if (sdata->wdev.use_4addr)
4373	return false;
4374	fallthrough;
4375	case NL80211_IFTYPE_AP:
4376	/* check runtime toggle for this bss */
4377	if (!sdata->bss->multicast_to_unicast)
4378	return false;
4379	break;
4380	default:
4381	return false;
4382	}
4383
4384	/* multicast to unicast conversion only for some payload */
4385	ethertype = eth->h_proto;
4386	if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4387	ethertype = ethvlan->h_vlan_encapsulated_proto;
4388	switch (ethertype) {
4389	case htons(ETH_P_ARP):
4390	case htons(ETH_P_IP):
4391	case htons(ETH_P_IPV6):
4392	break;
4393	default:
4394	return false;
4395	}
4396
4397	return true;
4398	}
4399
4400	static void
4401	ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4402	struct sk_buff_head *queue)
4403	{
4404	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4405	struct ieee80211_local *local = sdata->local;
4406	const struct ethhdr *eth = (struct ethhdr *)skb->data;
4407	struct sta_info *sta, *first = NULL;
4408	struct sk_buff *cloned_skb;
4409
4410	rcu_read_lock();
4411
4412	list_for_each_entry_rcu(sta, &local->sta_list, list) {
4413	if (sdata != sta->sdata)
4414	/* AP-VLAN mismatch */
4415	continue;
4416	if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4417	/* do not send back to source */
4418	continue;
4419	if (!first) {
4420	first = sta;
4421	continue;
4422	}
4423	cloned_skb = skb_clone(skb, GFP_ATOMIC);
4424	if (!cloned_skb)
4425	goto multicast;
4426	if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4427	dev_kfree_skb(cloned_skb);
4428	goto multicast;
4429	}
4430	__skb_queue_tail(list: queue, newsk: cloned_skb);
4431	}
4432
4433	if (likely(first)) {
4434	if (unlikely(ieee80211_change_da(skb, first)))
4435	goto multicast;
4436	__skb_queue_tail(list: queue, newsk: skb);
4437	} else {
4438	/* no STA connected, drop */
4439	kfree_skb(skb);
4440	skb = NULL;
4441	}
4442
4443	goto out;
4444	multicast:
4445	__skb_queue_purge(list: queue);
4446	__skb_queue_tail(list: queue, newsk: skb);
4447	out:
4448	rcu_read_unlock();
4449	}
4450
4451	static void ieee80211_mlo_multicast_tx_one(struct ieee80211_sub_if_data *sdata,
4452	struct sk_buff *skb, u32 ctrl_flags,
4453	unsigned int link_id)
4454	{
4455	struct sk_buff *out;
4456
4457	out = skb_copy(skb, GFP_ATOMIC);
4458	if (!out)
4459	return;
4460
4461	ctrl_flags |= u32_encode_bits(v: link_id, field: IEEE80211_TX_CTRL_MLO_LINK);
4462	__ieee80211_subif_start_xmit(skb: out, dev: sdata->dev, info_flags: 0, ctrl_flags, NULL);
4463	}
4464
4465	static void ieee80211_mlo_multicast_tx(struct net_device *dev,
4466	struct sk_buff *skb)
4467	{
4468	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4469	unsigned long links = sdata->vif.active_links;
4470	unsigned int link;
4471	u32 ctrl_flags = IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX;
4472
4473	if (hweight16(links) == 1) {
4474	ctrl_flags |= u32_encode_bits(__ffs(links),
4475	field: IEEE80211_TX_CTRL_MLO_LINK);
4476
4477	__ieee80211_subif_start_xmit(skb, dev: sdata->dev, info_flags: 0, ctrl_flags,
4478	NULL);
4479	return;
4480	}
4481
4482	for_each_set_bit(link, &links, IEEE80211_MLD_MAX_NUM_LINKS) {
4483	ieee80211_mlo_multicast_tx_one(sdata, skb, ctrl_flags, link_id: link);
4484	ctrl_flags = 0;
4485	}
4486	kfree_skb(skb);
4487	}
4488
4489	/**
4490	* ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4491	* @skb: packet to be sent
4492	* @dev: incoming interface
4493	*
4494	* On failure skb will be freed.
4495	*
4496	* Returns: the netdev TX status (but really only %NETDEV_TX_OK)
4497	*/
4498	netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4499	struct net_device *dev)
4500	{
4501	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4502	const struct ethhdr *eth = (void *)skb->data;
4503
4504	if (likely(!is_multicast_ether_addr(eth->h_dest)))
4505	goto normal;
4506
4507	if (unlikely(!ieee80211_sdata_running(sdata))) {
4508	kfree_skb(skb);
4509	return NETDEV_TX_OK;
4510	}
4511
4512	if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4513	struct sk_buff_head queue;
4514
4515	__skb_queue_head_init(list: &queue);
4516	ieee80211_convert_to_unicast(skb, dev, queue: &queue);
4517	while ((skb = __skb_dequeue(list: &queue)))
4518	__ieee80211_subif_start_xmit(skb, dev, info_flags: 0,
4519	IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4520	NULL);
4521	} else if (ieee80211_vif_is_mld(vif: &sdata->vif) &&
4522	sdata->vif.type == NL80211_IFTYPE_AP &&
4523	!ieee80211_hw_check(&sdata->local->hw, MLO_MCAST_MULTI_LINK_TX)) {
4524	ieee80211_mlo_multicast_tx(dev, skb);
4525	} else {
4526	normal:
4527	__ieee80211_subif_start_xmit(skb, dev, info_flags: 0,
4528	IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4529	NULL);
4530	}
4531
4532	return NETDEV_TX_OK;
4533	}
4534
4535
4536
4537	static bool __ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4538	struct sk_buff *skb, struct sta_info *sta,
4539	bool txpending)
4540	{
4541	struct ieee80211_local *local = sdata->local;
4542	struct ieee80211_tx_control control = {};
4543	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4544	struct ieee80211_sta *pubsta = NULL;
4545	unsigned long flags;
4546	int q = info->hw_queue;
4547
4548	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4549
4550	if (local->queue_stop_reasons[q] ||
4551	(!txpending && !skb_queue_empty(list: &local->pending[q]))) {
4552	if (txpending)
4553	skb_queue_head(list: &local->pending[q], newsk: skb);
4554	else
4555	skb_queue_tail(list: &local->pending[q], newsk: skb);
4556
4557	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
4558
4559	return false;
4560	}
4561
4562	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
4563
4564	if (sta && sta->uploaded)
4565	pubsta = &sta->sta;
4566
4567	control.sta = pubsta;
4568
4569	drv_tx(local, control: &control, skb);
4570
4571	return true;
4572	}
4573
4574	static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4575	struct sk_buff *skb, struct sta_info *sta,
4576	bool txpending)
4577	{
4578	struct ieee80211_local *local = sdata->local;
4579	struct sk_buff *next;
4580	bool ret = true;
4581
4582	if (ieee80211_queue_skb(local, sdata, sta, skb))
4583	return true;
4584
4585	skb_list_walk_safe(skb, skb, next) {
4586	skb_mark_not_on_list(skb);
4587	if (!__ieee80211_tx_8023(sdata, skb, sta, txpending))
4588	ret = false;
4589	}
4590
4591	return ret;
4592	}
4593
4594	static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4595	struct net_device *dev, struct sta_info *sta,
4596	struct ieee80211_key *key, struct sk_buff *skb)
4597	{
4598	struct ieee80211_tx_info *info;
4599	struct ieee80211_local *local = sdata->local;
4600	struct tid_ampdu_tx *tid_tx;
4601	struct sk_buff *seg, *next;
4602	unsigned int skbs = 0, len = 0;
4603	u16 queue;
4604	u8 tid;
4605
4606	queue = ieee80211_select_queue(sdata, sta, skb);
4607	skb_set_queue_mapping(skb, queue_mapping: queue);
4608
4609	if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4610	test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4611	goto out_free;
4612
4613	skb = skb_share_check(skb, GFP_ATOMIC);
4614	if (unlikely(!skb))
4615	return;
4616
4617	ieee80211_aggr_check(sdata, sta, skb);
4618
4619	tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4620	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4621	if (tid_tx) {
4622	if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4623	/* fall back to non-offload slow path */
4624	__ieee80211_subif_start_xmit(skb, dev, info_flags: 0,
4625	IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4626	NULL);
4627	return;
4628	}
4629
4630	if (tid_tx->timeout)
4631	tid_tx->last_tx = jiffies;
4632	}
4633
4634	skb = ieee80211_tx_skb_fixup(skb, features: ieee80211_sdata_netdev_features(sdata));
4635	if (!skb)
4636	return;
4637
4638	info = IEEE80211_SKB_CB(skb);
4639	memset(info, 0, sizeof(*info));
4640
4641	info->hw_queue = sdata->vif.hw_queue[queue];
4642
4643	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4644	sdata = container_of(sdata->bss,
4645	struct ieee80211_sub_if_data, u.ap);
4646
4647	info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4648	info->control.vif = &sdata->vif;
4649
4650	if (key)
4651	info->control.hw_key = &key->conf;
4652
4653	skb_list_walk_safe(skb, seg, next) {
4654	skbs++;
4655	len += seg->len;
4656	if (seg != skb)
4657	memcpy(IEEE80211_SKB_CB(seg), info, sizeof(*info));
4658	}
4659
4660	if (unlikely(skb->sk &&
4661	skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
4662	info->status_data = ieee80211_store_ack_skb(local, skb,
4663	info_flags: &info->flags, NULL);
4664	if (info->status_data)
4665	info->status_data_idr = 1;
4666	}
4667
4668	dev_sw_netstats_tx_add(dev, packets: skbs, len);
4669	sta->deflink.tx_stats.packets[queue] += skbs;
4670	sta->deflink.tx_stats.bytes[queue] += len;
4671
4672	ieee80211_tpt_led_trig_tx(local, bytes: len);
4673
4674	ieee80211_tx_8023(sdata, skb, sta, txpending: false);
4675
4676	return;
4677
4678	out_free:
4679	kfree_skb(skb);
4680	}
4681
4682	netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4683	struct net_device *dev)
4684	{
4685	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4686	struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4687	struct ieee80211_key *key;
4688	struct sta_info *sta;
4689
4690	if (unlikely(!ieee80211_sdata_running(sdata) || skb->len < ETH_HLEN)) {
4691	kfree_skb(skb);
4692	return NETDEV_TX_OK;
4693	}
4694
4695	rcu_read_lock();
4696
4697	if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta)) {
4698	kfree_skb(skb);
4699	goto out;
4700	}
4701
4702	if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4703	!test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4704	sdata->control_port_protocol == ehdr->h_proto))
4705	goto skip_offload;
4706
4707	key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4708	if (!key)
4709	key = rcu_dereference(sdata->default_unicast_key);
4710
4711	if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4712	key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4713	goto skip_offload;
4714
4715	sk_pacing_shift_update(sk: skb->sk, val: sdata->local->hw.tx_sk_pacing_shift);
4716	ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4717	goto out;
4718
4719	skip_offload:
4720	ieee80211_subif_start_xmit(skb, dev);
4721	out:
4722	rcu_read_unlock();
4723
4724	return NETDEV_TX_OK;
4725	}
4726
4727	struct sk_buff *
4728	ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4729	struct sk_buff *skb, u32 info_flags)
4730	{
4731	struct ieee80211_hdr *hdr;
4732	struct ieee80211_tx_data tx = {
4733	.local = sdata->local,
4734	.sdata = sdata,
4735	};
4736	struct sta_info *sta;
4737
4738	rcu_read_lock();
4739
4740	if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta)) {
4741	kfree_skb(skb);
4742	skb = ERR_PTR(error: -EINVAL);
4743	goto out;
4744	}
4745
4746	skb = ieee80211_build_hdr(sdata, skb, info_flags, sta,
4747	IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
4748	if (IS_ERR(ptr: skb))
4749	goto out;
4750
4751	hdr = (void *)skb->data;
4752	tx.sta = sta_info_get(sdata, addr: hdr->addr1);
4753	tx.skb = skb;
4754
4755	if (ieee80211_tx_h_select_key(tx: &tx) != TX_CONTINUE) {
4756	rcu_read_unlock();
4757	kfree_skb(skb);
4758	return ERR_PTR(error: -EINVAL);
4759	}
4760
4761	out:
4762	rcu_read_unlock();
4763	return skb;
4764	}
4765
4766	/*
4767	* ieee80211_clear_tx_pending may not be called in a context where
4768	* it is possible that it packets could come in again.
4769	*/
4770	void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4771	{
4772	struct sk_buff *skb;
4773	int i;
4774
4775	for (i = 0; i < local->hw.queues; i++) {
4776	while ((skb = skb_dequeue(list: &local->pending[i])) != NULL)
4777	ieee80211_free_txskb(hw: &local->hw, skb);
4778	}
4779	}
4780
4781	/*
4782	* Returns false if the frame couldn't be transmitted but was queued instead,
4783	* which in this case means re-queued -- take as an indication to stop sending
4784	* more pending frames.
4785	*/
4786	static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4787	struct sk_buff *skb)
4788	{
4789	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4790	struct ieee80211_sub_if_data *sdata;
4791	struct sta_info *sta;
4792	struct ieee80211_hdr *hdr;
4793	bool result;
4794	struct ieee80211_chanctx_conf *chanctx_conf;
4795
4796	sdata = vif_to_sdata(p: info->control.vif);
4797
4798	if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4799	/* update band only for non-MLD */
4800	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
4801	chanctx_conf =
4802	rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
4803	if (unlikely(!chanctx_conf)) {
4804	dev_kfree_skb(skb);
4805	return true;
4806	}
4807	info->band = chanctx_conf->def.chan->band;
4808	}
4809	result = ieee80211_tx(sdata, NULL, skb, txpending: true);
4810	} else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4811	if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta)) {
4812	dev_kfree_skb(skb);
4813	return true;
4814	}
4815
4816	if (IS_ERR(ptr: sta) || (sta && !sta->uploaded))
4817	sta = NULL;
4818
4819	result = ieee80211_tx_8023(sdata, skb, sta, txpending: true);
4820	} else {
4821	struct sk_buff_head skbs;
4822
4823	__skb_queue_head_init(list: &skbs);
4824	__skb_queue_tail(list: &skbs, newsk: skb);
4825
4826	hdr = (struct ieee80211_hdr *)skb->data;
4827	sta = sta_info_get(sdata, addr: hdr->addr1);
4828
4829	result = __ieee80211_tx(local, skbs: &skbs, sta, txpending: true);
4830	}
4831
4832	return result;
4833	}
4834
4835	/*
4836	* Transmit all pending packets. Called from tasklet.
4837	*/
4838	void ieee80211_tx_pending(struct tasklet_struct *t)
4839	{
4840	struct ieee80211_local *local = from_tasklet(local, t,
4841	tx_pending_tasklet);
4842	unsigned long flags;
4843	int i;
4844	bool txok;
4845
4846	rcu_read_lock();
4847
4848	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4849	for (i = 0; i < local->hw.queues; i++) {
4850	/*
4851	* If queue is stopped by something other than due to pending
4852	* frames, or we have no pending frames, proceed to next queue.
4853	*/
4854	if (local->queue_stop_reasons[i] ||
4855	skb_queue_empty(list: &local->pending[i]))
4856	continue;
4857
4858	while (!skb_queue_empty(list: &local->pending[i])) {
4859	struct sk_buff *skb = __skb_dequeue(list: &local->pending[i]);
4860	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4861
4862	if (WARN_ON(!info->control.vif)) {
4863	ieee80211_free_txskb(hw: &local->hw, skb);
4864	continue;
4865	}
4866
4867	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock,
4868	flags);
4869
4870	txok = ieee80211_tx_pending_skb(local, skb);
4871	spin_lock_irqsave(&local->queue_stop_reason_lock,
4872	flags);
4873	if (!txok)
4874	break;
4875	}
4876	}
4877	spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
4878
4879	rcu_read_unlock();
4880	}
4881
4882	/* functions for drivers to get certain frames */
4883
4884	static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4885	struct ieee80211_link_data *link,
4886	struct ps_data *ps, struct sk_buff *skb,
4887	bool is_template)
4888	{
4889	u8 *pos, *tim;
4890	int aid0 = 0;
4891	int i, have_bits = 0, n1, n2;
4892	struct ieee80211_bss_conf *link_conf = link->conf;
4893
4894	/* Generate bitmap for TIM only if there are any STAs in power save
4895	* mode. */
4896	if (atomic_read(v: &ps->num_sta_ps) > 0)
4897	/* in the hope that this is faster than
4898	* checking byte-for-byte */
4899	have_bits = !bitmap_empty(src: (unsigned long *)ps->tim,
4900	IEEE80211_MAX_AID+1);
4901	if (!is_template) {
4902	if (ps->dtim_count == 0)
4903	ps->dtim_count = link_conf->dtim_period - 1;
4904	else
4905	ps->dtim_count--;
4906	}
4907
4908	tim = pos = skb_put(skb, len: 5);
4909	*pos++ = WLAN_EID_TIM;
4910	*pos++ = 3;
4911	*pos++ = ps->dtim_count;
4912	*pos++ = link_conf->dtim_period;
4913
4914	if (ps->dtim_count == 0 && !skb_queue_empty(list: &ps->bc_buf))
4915	aid0 = 1;
4916
4917	ps->dtim_bc_mc = aid0 == 1;
4918
4919	if (have_bits) {
4920	/* Find largest even number N1 so that bits numbered 1 through
4921	* (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4922	* (N2 + 1) x 8 through 2007 are 0. */
4923	n1 = 0;
4924	for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4925	if (ps->tim[i]) {
4926	n1 = i & 0xfe;
4927	break;
4928	}
4929	}
4930	n2 = n1;
4931	for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4932	if (ps->tim[i]) {
4933	n2 = i;
4934	break;
4935	}
4936	}
4937
4938	/* Bitmap control */
4939	*pos++ = n1 | aid0;
4940	/* Part Virt Bitmap */
4941	skb_put_data(skb, data: ps->tim + n1, len: n2 - n1 + 1);
4942
4943	tim[1] = n2 - n1 + 4;
4944	} else {
4945	*pos++ = aid0; /* Bitmap control */
4946
4947	if (ieee80211_get_link_sband(link)->band != NL80211_BAND_S1GHZ) {
4948	tim[1] = 4;
4949	/* Part Virt Bitmap */
4950	skb_put_u8(skb, val: 0);
4951	}
4952	}
4953	}
4954
4955	static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4956	struct ieee80211_link_data *link,
4957	struct ps_data *ps, struct sk_buff *skb,
4958	bool is_template)
4959	{
4960	struct ieee80211_local *local = sdata->local;
4961
4962	/*
4963	* Not very nice, but we want to allow the driver to call
4964	* ieee80211_beacon_get() as a response to the set_tim()
4965	* callback. That, however, is already invoked under the
4966	* sta_lock to guarantee consistent and race-free update
4967	* of the tim bitmap in mac80211 and the driver.
4968	*/
4969	if (local->tim_in_locked_section) {
4970	__ieee80211_beacon_add_tim(sdata, link, ps, skb, is_template);
4971	} else {
4972	spin_lock_bh(lock: &local->tim_lock);
4973	__ieee80211_beacon_add_tim(sdata, link, ps, skb, is_template);
4974	spin_unlock_bh(lock: &local->tim_lock);
4975	}
4976
4977	return 0;
4978	}
4979
4980	static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4981	struct beacon_data *beacon,
4982	struct ieee80211_link_data *link)
4983	{
4984	u8 *beacon_data, count, max_count = 1;
4985	struct probe_resp *resp;
4986	size_t beacon_data_len;
4987	u16 *bcn_offsets;
4988	int i;
4989
4990	switch (sdata->vif.type) {
4991	case NL80211_IFTYPE_AP:
4992	beacon_data = beacon->tail;
4993	beacon_data_len = beacon->tail_len;
4994	break;
4995	case NL80211_IFTYPE_ADHOC:
4996	beacon_data = beacon->head;
4997	beacon_data_len = beacon->head_len;
4998	break;
4999	case NL80211_IFTYPE_MESH_POINT:
5000	beacon_data = beacon->head;
5001	beacon_data_len = beacon->head_len;
5002	break;
5003	default:
5004	return;
5005	}
5006
5007	resp = rcu_dereference(link->u.ap.probe_resp);
5008
5009	bcn_offsets = beacon->cntdwn_counter_offsets;
5010	count = beacon->cntdwn_current_counter;
5011	if (link->conf->csa_active)
5012	max_count = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
5013
5014	for (i = 0; i < max_count; ++i) {
5015	if (bcn_offsets[i]) {
5016	if (WARN_ON_ONCE(bcn_offsets[i] >= beacon_data_len))
5017	return;
5018	beacon_data[bcn_offsets[i]] = count;
5019	}
5020
5021	if (sdata->vif.type == NL80211_IFTYPE_AP && resp) {
5022	u16 *resp_offsets = resp->cntdwn_counter_offsets;
5023
5024	resp->data[resp_offsets[i]] = count;
5025	}
5026	}
5027	}
5028
5029	static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
5030	{
5031	beacon->cntdwn_current_counter--;
5032
5033	/* the counter should never reach 0 */
5034	WARN_ON_ONCE(!beacon->cntdwn_current_counter);
5035
5036	return beacon->cntdwn_current_counter;
5037	}
5038
5039	u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif, unsigned int link_id)
5040	{
5041	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5042	struct ieee80211_link_data *link;
5043	struct beacon_data *beacon = NULL;
5044	u8 count = 0;
5045
5046	if (WARN_ON(link_id >= IEEE80211_MLD_MAX_NUM_LINKS))
5047	return 0;
5048
5049	rcu_read_lock();
5050
5051	link = rcu_dereference(sdata->link[link_id]);
5052	if (!link)
5053	goto unlock;
5054
5055	if (sdata->vif.type == NL80211_IFTYPE_AP)
5056	beacon = rcu_dereference(link->u.ap.beacon);
5057	else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
5058	beacon = rcu_dereference(sdata->u.ibss.presp);
5059	else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
5060	beacon = rcu_dereference(sdata->u.mesh.beacon);
5061
5062	if (!beacon)
5063	goto unlock;
5064
5065	count = __ieee80211_beacon_update_cntdwn(beacon);
5066
5067	unlock:
5068	rcu_read_unlock();
5069	return count;
5070	}
5071	EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
5072
5073	void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
5074	{
5075	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5076	struct beacon_data *beacon = NULL;
5077
5078	rcu_read_lock();
5079
5080	if (sdata->vif.type == NL80211_IFTYPE_AP)
5081	beacon = rcu_dereference(sdata->deflink.u.ap.beacon);
5082	else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
5083	beacon = rcu_dereference(sdata->u.ibss.presp);
5084	else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
5085	beacon = rcu_dereference(sdata->u.mesh.beacon);
5086
5087	if (!beacon)
5088	goto unlock;
5089
5090	if (counter < beacon->cntdwn_current_counter)
5091	beacon->cntdwn_current_counter = counter;
5092
5093	unlock:
5094	rcu_read_unlock();
5095	}
5096	EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
5097
5098	bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif,
5099	unsigned int link_id)
5100	{
5101	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5102	struct ieee80211_link_data *link;
5103	struct beacon_data *beacon = NULL;
5104	u8 *beacon_data;
5105	size_t beacon_data_len;
5106	int ret = false;
5107
5108	if (!ieee80211_sdata_running(sdata))
5109	return false;
5110
5111	if (WARN_ON(link_id >= IEEE80211_MLD_MAX_NUM_LINKS))
5112	return 0;
5113
5114	rcu_read_lock();
5115
5116	link = rcu_dereference(sdata->link[link_id]);
5117	if (!link)
5118	goto out;
5119
5120	if (vif->type == NL80211_IFTYPE_AP) {
5121	beacon = rcu_dereference(link->u.ap.beacon);
5122	if (WARN_ON(!beacon || !beacon->tail))
5123	goto out;
5124	beacon_data = beacon->tail;
5125	beacon_data_len = beacon->tail_len;
5126	} else if (vif->type == NL80211_IFTYPE_ADHOC) {
5127	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5128
5129	beacon = rcu_dereference(ifibss->presp);
5130	if (!beacon)
5131	goto out;
5132
5133	beacon_data = beacon->head;
5134	beacon_data_len = beacon->head_len;
5135	} else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
5136	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5137
5138	beacon = rcu_dereference(ifmsh->beacon);
5139	if (!beacon)
5140	goto out;
5141
5142	beacon_data = beacon->head;
5143	beacon_data_len = beacon->head_len;
5144	} else {
5145	WARN_ON(1);
5146	goto out;
5147	}
5148
5149	if (!beacon->cntdwn_counter_offsets[0])
5150	goto out;
5151
5152	if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
5153	goto out;
5154
5155	if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
5156	ret = true;
5157
5158	out:
5159	rcu_read_unlock();
5160
5161	return ret;
5162	}
5163	EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
5164
5165	static int ieee80211_beacon_protect(struct sk_buff *skb,
5166	struct ieee80211_local *local,
5167	struct ieee80211_sub_if_data *sdata,
5168	struct ieee80211_link_data *link)
5169	{
5170	ieee80211_tx_result res;
5171	struct ieee80211_tx_data tx;
5172	struct sk_buff *check_skb;
5173
5174	memset(&tx, 0, sizeof(tx));
5175	tx.key = rcu_dereference(link->default_beacon_key);
5176	if (!tx.key)
5177	return 0;
5178
5179	if (unlikely(tx.key->flags & KEY_FLAG_TAINTED)) {
5180	tx.key = NULL;
5181	return -EINVAL;
5182	}
5183
5184	if (!(tx.key->conf.flags & IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
5185	tx.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
5186	IEEE80211_SKB_CB(skb)->control.hw_key = &tx.key->conf;
5187
5188	tx.local = local;
5189	tx.sdata = sdata;
5190	__skb_queue_head_init(list: &tx.skbs);
5191	__skb_queue_tail(list: &tx.skbs, newsk: skb);
5192	res = ieee80211_tx_h_encrypt(tx: &tx);
5193	check_skb = __skb_dequeue(list: &tx.skbs);
5194	/* we may crash after this, but it'd be a bug in crypto */
5195	WARN_ON(check_skb != skb);
5196	if (WARN_ON_ONCE(res != TX_CONTINUE))
5197	return -EINVAL;
5198
5199	return 0;
5200	}
5201
5202	static void
5203	ieee80211_beacon_get_finish(struct ieee80211_hw *hw,
5204	struct ieee80211_vif *vif,
5205	struct ieee80211_link_data *link,
5206	struct ieee80211_mutable_offsets *offs,
5207	struct beacon_data *beacon,
5208	struct sk_buff *skb,
5209	struct ieee80211_chanctx_conf *chanctx_conf,
5210	u16 csa_off_base)
5211	{
5212	struct ieee80211_local *local = hw_to_local(hw);
5213	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5214	struct ieee80211_tx_info *info;
5215	enum nl80211_band band;
5216	struct ieee80211_tx_rate_control txrc;
5217
5218	/* CSA offsets */
5219	if (offs && beacon) {
5220	u16 i;
5221
5222	for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
5223	u16 csa_off = beacon->cntdwn_counter_offsets[i];
5224
5225	if (!csa_off)
5226	continue;
5227
5228	offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
5229	}
5230	}
5231
5232	band = chanctx_conf->def.chan->band;
5233	info = IEEE80211_SKB_CB(skb);
5234	info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5235	info->flags |= IEEE80211_TX_CTL_NO_ACK;
5236	info->band = band;
5237
5238	memset(&txrc, 0, sizeof(txrc));
5239	txrc.hw = hw;
5240	txrc.sband = local->hw.wiphy->bands[band];
5241	txrc.bss_conf = link->conf;
5242	txrc.skb = skb;
5243	txrc.reported_rate.idx = -1;
5244	if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
5245	txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
5246	else
5247	txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
5248	txrc.bss = true;
5249	rate_control_get_rate(sdata, NULL, txrc: &txrc);
5250
5251	info->control.vif = vif;
5252	info->control.flags |= u32_encode_bits(v: link->link_id,
5253	field: IEEE80211_TX_CTRL_MLO_LINK);
5254	info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
5255	IEEE80211_TX_CTL_ASSIGN_SEQ |
5256	IEEE80211_TX_CTL_FIRST_FRAGMENT;
5257	}
5258
5259	static void
5260	ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon,
5261	u8 i)
5262	{
5263	if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt ||
5264	i > beacon->mbssid_ies->cnt)
5265	return;
5266
5267	if (i < beacon->mbssid_ies->cnt) {
5268	skb_put_data(skb, data: beacon->mbssid_ies->elem[i].data,
5269	len: beacon->mbssid_ies->elem[i].len);
5270
5271	if (beacon->rnr_ies && beacon->rnr_ies->cnt) {
5272	skb_put_data(skb, data: beacon->rnr_ies->elem[i].data,
5273	len: beacon->rnr_ies->elem[i].len);
5274
5275	for (i = beacon->mbssid_ies->cnt; i < beacon->rnr_ies->cnt; i++)
5276	skb_put_data(skb, data: beacon->rnr_ies->elem[i].data,
5277	len: beacon->rnr_ies->elem[i].len);
5278	}
5279	return;
5280	}
5281
5282	/* i == beacon->mbssid_ies->cnt, include all MBSSID elements */
5283	for (i = 0; i < beacon->mbssid_ies->cnt; i++)
5284	skb_put_data(skb, data: beacon->mbssid_ies->elem[i].data,
5285	len: beacon->mbssid_ies->elem[i].len);
5286	}
5287
5288	static struct sk_buff *
5289	ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
5290	struct ieee80211_vif *vif,
5291	struct ieee80211_link_data *link,
5292	struct ieee80211_mutable_offsets *offs,
5293	bool is_template,
5294	struct beacon_data *beacon,
5295	struct ieee80211_chanctx_conf *chanctx_conf,
5296	u8 ema_index)
5297	{
5298	struct ieee80211_local *local = hw_to_local(hw);
5299	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5300	struct ieee80211_if_ap *ap = &sdata->u.ap;
5301	struct sk_buff *skb = NULL;
5302	u16 csa_off_base = 0;
5303	int mbssid_len;
5304
5305	if (beacon->cntdwn_counter_offsets[0]) {
5306	if (!is_template)
5307	ieee80211_beacon_update_cntdwn(vif, link->link_id);
5308
5309	ieee80211_set_beacon_cntdwn(sdata, beacon, link);
5310	}
5311
5312	/* headroom, head length,
5313	* tail length, maximum TIM length and multiple BSSID length
5314	*/
5315	mbssid_len = ieee80211_get_mbssid_beacon_len(elems: beacon->mbssid_ies,
5316	rnr_elems: beacon->rnr_ies,
5317	i: ema_index);
5318
5319	skb = dev_alloc_skb(length: local->tx_headroom + beacon->head_len +
5320	beacon->tail_len + 256 +
5321	local->hw.extra_beacon_tailroom + mbssid_len);
5322	if (!skb)
5323	return NULL;
5324
5325	skb_reserve(skb, len: local->tx_headroom);
5326	skb_put_data(skb, data: beacon->head, len: beacon->head_len);
5327
5328	ieee80211_beacon_add_tim(sdata, link, ps: &ap->ps, skb, is_template);
5329
5330	if (offs) {
5331	offs->tim_offset = beacon->head_len;
5332	offs->tim_length = skb->len - beacon->head_len;
5333	offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0];
5334
5335	if (mbssid_len) {
5336	ieee80211_beacon_add_mbssid(skb, beacon, i: ema_index);
5337	offs->mbssid_off = skb->len - mbssid_len;
5338	}
5339
5340	/* for AP the csa offsets are from tail */
5341	csa_off_base = skb->len;
5342	}
5343
5344	if (beacon->tail)
5345	skb_put_data(skb, data: beacon->tail, len: beacon->tail_len);
5346
5347	if (ieee80211_beacon_protect(skb, local, sdata, link) < 0)
5348	return NULL;
5349
5350	ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5351	chanctx_conf, csa_off_base);
5352	return skb;
5353	}
5354
5355	static struct ieee80211_ema_beacons *
5356	ieee80211_beacon_get_ap_ema_list(struct ieee80211_hw *hw,
5357	struct ieee80211_vif *vif,
5358	struct ieee80211_link_data *link,
5359	struct ieee80211_mutable_offsets *offs,
5360	bool is_template, struct beacon_data *beacon,
5361	struct ieee80211_chanctx_conf *chanctx_conf)
5362	{
5363	struct ieee80211_ema_beacons *ema = NULL;
5364
5365	if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt)
5366	return NULL;
5367
5368	ema = kzalloc(struct_size(ema, bcn, beacon->mbssid_ies->cnt),
5369	GFP_ATOMIC);
5370	if (!ema)
5371	return NULL;
5372
5373	for (ema->cnt = 0; ema->cnt < beacon->mbssid_ies->cnt; ema->cnt++) {
5374	ema->bcn[ema->cnt].skb =
5375	ieee80211_beacon_get_ap(hw, vif, link,
5376	offs: &ema->bcn[ema->cnt].offs,
5377	is_template, beacon,
5378	chanctx_conf, ema_index: ema->cnt);
5379	if (!ema->bcn[ema->cnt].skb)
5380	break;
5381	}
5382
5383	if (ema->cnt == beacon->mbssid_ies->cnt)
5384	return ema;
5385
5386	ieee80211_beacon_free_ema_list(ema_beacons: ema);
5387	return NULL;
5388	}
5389
5390	#define IEEE80211_INCLUDE_ALL_MBSSID_ELEMS -1
5391
5392	static struct sk_buff *
5393	__ieee80211_beacon_get(struct ieee80211_hw *hw,
5394	struct ieee80211_vif *vif,
5395	struct ieee80211_mutable_offsets *offs,
5396	bool is_template,
5397	unsigned int link_id,
5398	int ema_index,
5399	struct ieee80211_ema_beacons **ema_beacons)
5400	{
5401	struct ieee80211_local *local = hw_to_local(hw);
5402	struct beacon_data *beacon = NULL;
5403	struct sk_buff *skb = NULL;
5404	struct ieee80211_sub_if_data *sdata = NULL;
5405	struct ieee80211_chanctx_conf *chanctx_conf;
5406	struct ieee80211_link_data *link;
5407
5408	rcu_read_lock();
5409
5410	sdata = vif_to_sdata(p: vif);
5411	link = rcu_dereference(sdata->link[link_id]);
5412	if (!link)
5413	goto out;
5414	chanctx_conf =
5415	rcu_dereference(link->conf->chanctx_conf);
5416
5417	if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
5418	goto out;
5419
5420	if (offs)
5421	memset(offs, 0, sizeof(*offs));
5422
5423	if (sdata->vif.type == NL80211_IFTYPE_AP) {
5424	beacon = rcu_dereference(link->u.ap.beacon);
5425	if (!beacon)
5426	goto out;
5427
5428	if (ema_beacons) {
5429	*ema_beacons =
5430	ieee80211_beacon_get_ap_ema_list(hw, vif, link,
5431	offs,
5432	is_template,
5433	beacon,
5434	chanctx_conf);
5435	} else {
5436	if (beacon->mbssid_ies && beacon->mbssid_ies->cnt) {
5437	if (ema_index >= beacon->mbssid_ies->cnt)
5438	goto out; /* End of MBSSID elements */
5439
5440	if (ema_index <= IEEE80211_INCLUDE_ALL_MBSSID_ELEMS)
5441	ema_index = beacon->mbssid_ies->cnt;
5442	} else {
5443	ema_index = 0;
5444	}
5445
5446	skb = ieee80211_beacon_get_ap(hw, vif, link, offs,
5447	is_template, beacon,
5448	chanctx_conf,
5449	ema_index);
5450	}
5451	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
5452	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5453	struct ieee80211_hdr *hdr;
5454
5455	beacon = rcu_dereference(ifibss->presp);
5456	if (!beacon)
5457	goto out;
5458
5459	if (beacon->cntdwn_counter_offsets[0]) {
5460	if (!is_template)
5461	__ieee80211_beacon_update_cntdwn(beacon);
5462
5463	ieee80211_set_beacon_cntdwn(sdata, beacon, link);
5464	}
5465
5466	skb = dev_alloc_skb(length: local->tx_headroom + beacon->head_len +
5467	local->hw.extra_beacon_tailroom);
5468	if (!skb)
5469	goto out;
5470	skb_reserve(skb, len: local->tx_headroom);
5471	skb_put_data(skb, data: beacon->head, len: beacon->head_len);
5472
5473	hdr = (struct ieee80211_hdr *) skb->data;
5474	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5475	IEEE80211_STYPE_BEACON);
5476
5477	ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5478	chanctx_conf, csa_off_base: 0);
5479	} else if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
5480	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5481
5482	beacon = rcu_dereference(ifmsh->beacon);
5483	if (!beacon)
5484	goto out;
5485
5486	if (beacon->cntdwn_counter_offsets[0]) {
5487	if (!is_template)
5488	/* TODO: For mesh csa_counter is in TU, so
5489	* decrementing it by one isn't correct, but
5490	* for now we leave it consistent with overall
5491	* mac80211's behavior.
5492	*/
5493	__ieee80211_beacon_update_cntdwn(beacon);
5494
5495	ieee80211_set_beacon_cntdwn(sdata, beacon, link);
5496	}
5497
5498	if (ifmsh->sync_ops)
5499	ifmsh->sync_ops->adjust_tsf(sdata, beacon);
5500
5501	skb = dev_alloc_skb(length: local->tx_headroom +
5502	beacon->head_len +
5503	256 + /* TIM IE */
5504	beacon->tail_len +
5505	local->hw.extra_beacon_tailroom);
5506	if (!skb)
5507	goto out;
5508	skb_reserve(skb, len: local->tx_headroom);
5509	skb_put_data(skb, data: beacon->head, len: beacon->head_len);
5510	ieee80211_beacon_add_tim(sdata, link, ps: &ifmsh->ps, skb,
5511	is_template);
5512
5513	if (offs) {
5514	offs->tim_offset = beacon->head_len;
5515	offs->tim_length = skb->len - beacon->head_len;
5516	}
5517
5518	skb_put_data(skb, data: beacon->tail, len: beacon->tail_len);
5519	ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5520	chanctx_conf, csa_off_base: 0);
5521	} else {
5522	WARN_ON(1);
5523	goto out;
5524	}
5525
5526	out:
5527	rcu_read_unlock();
5528	return skb;
5529
5530	}
5531
5532	struct sk_buff *
5533	ieee80211_beacon_get_template(struct ieee80211_hw *hw,
5534	struct ieee80211_vif *vif,
5535	struct ieee80211_mutable_offsets *offs,
5536	unsigned int link_id)
5537	{
5538	return __ieee80211_beacon_get(hw, vif, offs, is_template: true, link_id,
5539	IEEE80211_INCLUDE_ALL_MBSSID_ELEMS, NULL);
5540	}
5541	EXPORT_SYMBOL(ieee80211_beacon_get_template);
5542
5543	struct sk_buff *
5544	ieee80211_beacon_get_template_ema_index(struct ieee80211_hw *hw,
5545	struct ieee80211_vif *vif,
5546	struct ieee80211_mutable_offsets *offs,
5547	unsigned int link_id, u8 ema_index)
5548	{
5549	return __ieee80211_beacon_get(hw, vif, offs, is_template: true, link_id, ema_index,
5550	NULL);
5551	}
5552	EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_index);
5553
5554	void ieee80211_beacon_free_ema_list(struct ieee80211_ema_beacons *ema_beacons)
5555	{
5556	u8 i;
5557
5558	if (!ema_beacons)
5559	return;
5560
5561	for (i = 0; i < ema_beacons->cnt; i++)
5562	kfree_skb(skb: ema_beacons->bcn[i].skb);
5563
5564	kfree(objp: ema_beacons);
5565	}
5566	EXPORT_SYMBOL(ieee80211_beacon_free_ema_list);
5567
5568	struct ieee80211_ema_beacons *
5569	ieee80211_beacon_get_template_ema_list(struct ieee80211_hw *hw,
5570	struct ieee80211_vif *vif,
5571	unsigned int link_id)
5572	{
5573	struct ieee80211_ema_beacons *ema_beacons = NULL;
5574
5575	WARN_ON(__ieee80211_beacon_get(hw, vif, NULL, true, link_id, 0,
5576	&ema_beacons));
5577
5578	return ema_beacons;
5579	}
5580	EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_list);
5581
5582	struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
5583	struct ieee80211_vif *vif,
5584	u16 *tim_offset, u16 *tim_length,
5585	unsigned int link_id)
5586	{
5587	struct ieee80211_mutable_offsets offs = {};
5588	struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, offs: &offs, is_template: false,
5589	link_id,
5590	IEEE80211_INCLUDE_ALL_MBSSID_ELEMS,
5591	NULL);
5592	struct sk_buff *copy;
5593
5594	if (!bcn)
5595	return bcn;
5596
5597	if (tim_offset)
5598	*tim_offset = offs.tim_offset;
5599
5600	if (tim_length)
5601	*tim_length = offs.tim_length;
5602
5603	if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
5604	!hw_to_local(hw)->monitors)
5605	return bcn;
5606
5607	/* send a copy to monitor interfaces */
5608	copy = skb_copy(skb: bcn, GFP_ATOMIC);
5609	if (!copy)
5610	return bcn;
5611
5612	ieee80211_tx_monitor(local: hw_to_local(hw), skb: copy, retry_count: 1, send_to_cooked: false, NULL);
5613
5614	return bcn;
5615	}
5616	EXPORT_SYMBOL(ieee80211_beacon_get_tim);
5617
5618	struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
5619	struct ieee80211_vif *vif)
5620	{
5621	struct sk_buff *skb = NULL;
5622	struct probe_resp *presp = NULL;
5623	struct ieee80211_hdr *hdr;
5624	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5625
5626	if (sdata->vif.type != NL80211_IFTYPE_AP)
5627	return NULL;
5628
5629	rcu_read_lock();
5630	presp = rcu_dereference(sdata->deflink.u.ap.probe_resp);
5631	if (!presp)
5632	goto out;
5633
5634	skb = dev_alloc_skb(length: presp->len);
5635	if (!skb)
5636	goto out;
5637
5638	skb_put_data(skb, data: presp->data, len: presp->len);
5639
5640	hdr = (struct ieee80211_hdr *) skb->data;
5641	memset(hdr->addr1, 0, sizeof(hdr->addr1));
5642
5643	out:
5644	rcu_read_unlock();
5645	return skb;
5646	}
5647	EXPORT_SYMBOL(ieee80211_proberesp_get);
5648
5649	struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
5650	struct ieee80211_vif *vif)
5651	{
5652	struct sk_buff *skb = NULL;
5653	struct fils_discovery_data *tmpl = NULL;
5654	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5655
5656	if (sdata->vif.type != NL80211_IFTYPE_AP)
5657	return NULL;
5658
5659	rcu_read_lock();
5660	tmpl = rcu_dereference(sdata->deflink.u.ap.fils_discovery);
5661	if (!tmpl) {
5662	rcu_read_unlock();
5663	return NULL;
5664	}
5665
5666	skb = dev_alloc_skb(length: sdata->local->hw.extra_tx_headroom + tmpl->len);
5667	if (skb) {
5668	skb_reserve(skb, len: sdata->local->hw.extra_tx_headroom);
5669	skb_put_data(skb, data: tmpl->data, len: tmpl->len);
5670	}
5671
5672	rcu_read_unlock();
5673	return skb;
5674	}
5675	EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5676
5677	struct sk_buff *
5678	ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5679	struct ieee80211_vif *vif)
5680	{
5681	struct sk_buff *skb = NULL;
5682	struct unsol_bcast_probe_resp_data *tmpl = NULL;
5683	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5684
5685	if (sdata->vif.type != NL80211_IFTYPE_AP)
5686	return NULL;
5687
5688	rcu_read_lock();
5689	tmpl = rcu_dereference(sdata->deflink.u.ap.unsol_bcast_probe_resp);
5690	if (!tmpl) {
5691	rcu_read_unlock();
5692	return NULL;
5693	}
5694
5695	skb = dev_alloc_skb(length: sdata->local->hw.extra_tx_headroom + tmpl->len);
5696	if (skb) {
5697	skb_reserve(skb, len: sdata->local->hw.extra_tx_headroom);
5698	skb_put_data(skb, data: tmpl->data, len: tmpl->len);
5699	}
5700
5701	rcu_read_unlock();
5702	return skb;
5703	}
5704	EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5705
5706	struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5707	struct ieee80211_vif *vif)
5708	{
5709	struct ieee80211_sub_if_data *sdata;
5710	struct ieee80211_pspoll *pspoll;
5711	struct ieee80211_local *local;
5712	struct sk_buff *skb;
5713
5714	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5715	return NULL;
5716
5717	sdata = vif_to_sdata(p: vif);
5718	local = sdata->local;
5719
5720	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + sizeof(*pspoll));
5721	if (!skb)
5722	return NULL;
5723
5724	skb_reserve(skb, len: local->hw.extra_tx_headroom);
5725
5726	pspoll = skb_put_zero(skb, len: sizeof(*pspoll));
5727	pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5728	IEEE80211_STYPE_PSPOLL);
5729	pspoll->aid = cpu_to_le16(sdata->vif.cfg.aid);
5730
5731	/* aid in PS-Poll has its two MSBs each set to 1 */
5732	pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5733
5734	memcpy(pspoll->bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN);
5735	memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5736
5737	return skb;
5738	}
5739	EXPORT_SYMBOL(ieee80211_pspoll_get);
5740
5741	struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5742	struct ieee80211_vif *vif,
5743	int link_id, bool qos_ok)
5744	{
5745	struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5746	struct ieee80211_local *local = sdata->local;
5747	struct ieee80211_link_data *link = NULL;
5748	struct ieee80211_hdr_3addr *nullfunc;
5749	struct sk_buff *skb;
5750	bool qos = false;
5751
5752	if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5753	return NULL;
5754
5755	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom +
5756	sizeof(*nullfunc) + 2);
5757	if (!skb)
5758	return NULL;
5759
5760	rcu_read_lock();
5761	if (qos_ok) {
5762	struct sta_info *sta;
5763
5764	sta = sta_info_get(sdata, addr: vif->cfg.ap_addr);
5765	qos = sta && sta->sta.wme;
5766	}
5767
5768	if (link_id >= 0) {
5769	link = rcu_dereference(sdata->link[link_id]);
5770	if (WARN_ON_ONCE(!link)) {
5771	rcu_read_unlock();
5772	kfree_skb(skb);
5773	return NULL;
5774	}
5775	}
5776
5777	skb_reserve(skb, len: local->hw.extra_tx_headroom);
5778
5779	nullfunc = skb_put_zero(skb, len: sizeof(*nullfunc));
5780	nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5781	IEEE80211_STYPE_NULLFUNC |
5782	IEEE80211_FCTL_TODS);
5783	if (qos) {
5784	__le16 qoshdr = cpu_to_le16(7);
5785
5786	BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5787	IEEE80211_STYPE_NULLFUNC) !=
5788	IEEE80211_STYPE_QOS_NULLFUNC);
5789	nullfunc->frame_control |=
5790	cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5791	skb->priority = 7;
5792	skb_set_queue_mapping(skb, queue_mapping: IEEE80211_AC_VO);
5793	skb_put_data(skb, data: &qoshdr, len: sizeof(qoshdr));
5794	}
5795
5796	if (link) {
5797	memcpy(nullfunc->addr1, link->conf->bssid, ETH_ALEN);
5798	memcpy(nullfunc->addr2, link->conf->addr, ETH_ALEN);
5799	memcpy(nullfunc->addr3, link->conf->bssid, ETH_ALEN);
5800	} else {
5801	memcpy(nullfunc->addr1, vif->cfg.ap_addr, ETH_ALEN);
5802	memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5803	memcpy(nullfunc->addr3, vif->cfg.ap_addr, ETH_ALEN);
5804	}
5805	rcu_read_unlock();
5806
5807	return skb;
5808	}
5809	EXPORT_SYMBOL(ieee80211_nullfunc_get);
5810
5811	struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5812	const u8 *src_addr,
5813	const u8 *ssid, size_t ssid_len,
5814	size_t tailroom)
5815	{
5816	struct ieee80211_local *local = hw_to_local(hw);
5817	struct ieee80211_hdr_3addr *hdr;
5818	struct sk_buff *skb;
5819	size_t ie_ssid_len;
5820	u8 *pos;
5821
5822	ie_ssid_len = 2 + ssid_len;
5823
5824	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + sizeof(*hdr) +
5825	ie_ssid_len + tailroom);
5826	if (!skb)
5827	return NULL;
5828
5829	skb_reserve(skb, len: local->hw.extra_tx_headroom);
5830
5831	hdr = skb_put_zero(skb, len: sizeof(*hdr));
5832	hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5833	IEEE80211_STYPE_PROBE_REQ);
5834	eth_broadcast_addr(addr: hdr->addr1);
5835	memcpy(hdr->addr2, src_addr, ETH_ALEN);
5836	eth_broadcast_addr(addr: hdr->addr3);
5837
5838	pos = skb_put(skb, len: ie_ssid_len);
5839	*pos++ = WLAN_EID_SSID;
5840	*pos++ = ssid_len;
5841	if (ssid_len)
5842	memcpy(pos, ssid, ssid_len);
5843	pos += ssid_len;
5844
5845	return skb;
5846	}
5847	EXPORT_SYMBOL(ieee80211_probereq_get);
5848
5849	void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5850	const void *frame, size_t frame_len,
5851	const struct ieee80211_tx_info *frame_txctl,
5852	struct ieee80211_rts *rts)
5853	{
5854	const struct ieee80211_hdr *hdr = frame;
5855
5856	rts->frame_control =
5857	cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5858	rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5859	frame_txctl);
5860	memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5861	memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5862	}
5863	EXPORT_SYMBOL(ieee80211_rts_get);
5864
5865	void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5866	const void *frame, size_t frame_len,
5867	const struct ieee80211_tx_info *frame_txctl,
5868	struct ieee80211_cts *cts)
5869	{
5870	const struct ieee80211_hdr *hdr = frame;
5871
5872	cts->frame_control =
5873	cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5874	cts->duration = ieee80211_ctstoself_duration(hw, vif,
5875	frame_len, frame_txctl);
5876	memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5877	}
5878	EXPORT_SYMBOL(ieee80211_ctstoself_get);
5879
5880	struct sk_buff *
5881	ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5882	struct ieee80211_vif *vif)
5883	{
5884	struct ieee80211_local *local = hw_to_local(hw);
5885	struct sk_buff *skb = NULL;
5886	struct ieee80211_tx_data tx;
5887	struct ieee80211_sub_if_data *sdata;
5888	struct ps_data *ps;
5889	struct ieee80211_tx_info *info;
5890	struct ieee80211_chanctx_conf *chanctx_conf;
5891
5892	sdata = vif_to_sdata(p: vif);
5893
5894	rcu_read_lock();
5895	chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
5896
5897	if (!chanctx_conf)
5898	goto out;
5899
5900	if (sdata->vif.type == NL80211_IFTYPE_AP) {
5901	struct beacon_data *beacon =
5902	rcu_dereference(sdata->deflink.u.ap.beacon);
5903
5904	if (!beacon || !beacon->head)
5905	goto out;
5906
5907	ps = &sdata->u.ap.ps;
5908	} else if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
5909	ps = &sdata->u.mesh.ps;
5910	} else {
5911	goto out;
5912	}
5913
5914	if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5915	goto out; /* send buffered bc/mc only after DTIM beacon */
5916
5917	while (1) {
5918	skb = skb_dequeue(list: &ps->bc_buf);
5919	if (!skb)
5920	goto out;
5921	local->total_ps_buffered--;
5922
5923	if (!skb_queue_empty(list: &ps->bc_buf) && skb->len >= 2) {
5924	struct ieee80211_hdr *hdr =
5925	(struct ieee80211_hdr *) skb->data;
5926	/* more buffered multicast/broadcast frames ==> set
5927	* MoreData flag in IEEE 802.11 header to inform PS
5928	* STAs */
5929	hdr->frame_control |=
5930	cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5931	}
5932
5933	if (sdata->vif.type == NL80211_IFTYPE_AP)
5934	sdata = IEEE80211_DEV_TO_SUB_IF(dev: skb->dev);
5935	if (!ieee80211_tx_prepare(sdata, tx: &tx, NULL, skb))
5936	break;
5937	ieee80211_free_txskb(hw, skb);
5938	}
5939
5940	info = IEEE80211_SKB_CB(skb);
5941
5942	tx.flags |= IEEE80211_TX_PS_BUFFERED;
5943	info->band = chanctx_conf->def.chan->band;
5944
5945	if (invoke_tx_handlers(tx: &tx))
5946	skb = NULL;
5947	out:
5948	rcu_read_unlock();
5949
5950	return skb;
5951	}
5952	EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5953
5954	int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5955	{
5956	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5957	struct ieee80211_sub_if_data *sdata = sta->sdata;
5958	struct ieee80211_local *local = sdata->local;
5959	int ret;
5960	u32 queues;
5961
5962	lockdep_assert_wiphy(local->hw.wiphy);
5963
5964	/* only some cases are supported right now */
5965	switch (sdata->vif.type) {
5966	case NL80211_IFTYPE_STATION:
5967	case NL80211_IFTYPE_AP:
5968	case NL80211_IFTYPE_AP_VLAN:
5969	break;
5970	default:
5971	WARN_ON(1);
5972	return -EINVAL;
5973	}
5974
5975	if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5976	return -EINVAL;
5977
5978	if (sta->reserved_tid == tid) {
5979	ret = 0;
5980	goto out;
5981	}
5982
5983	if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5984	sdata_err(sdata, "TID reservation already active\n");
5985	ret = -EALREADY;
5986	goto out;
5987	}
5988
5989	ieee80211_stop_vif_queues(local: sdata->local, sdata,
5990	reason: IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5991
5992	synchronize_net();
5993
5994	/* Tear down BA sessions so we stop aggregating on this TID */
5995	if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5996	set_sta_flag(sta, flag: WLAN_STA_BLOCK_BA);
5997	__ieee80211_stop_tx_ba_session(sta, tid,
5998	reason: AGG_STOP_LOCAL_REQUEST);
5999	}
6000
6001	queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
6002	__ieee80211_flush_queues(local, sdata, queues, drop: false);
6003
6004	sta->reserved_tid = tid;
6005
6006	ieee80211_wake_vif_queues(local, sdata,
6007	reason: IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
6008
6009	if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
6010	clear_sta_flag(sta, flag: WLAN_STA_BLOCK_BA);
6011
6012	ret = 0;
6013	out:
6014	return ret;
6015	}
6016	EXPORT_SYMBOL(ieee80211_reserve_tid);
6017
6018	void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
6019	{
6020	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
6021	struct ieee80211_sub_if_data *sdata = sta->sdata;
6022
6023	lockdep_assert_wiphy(sdata->local->hw.wiphy);
6024
6025	/* only some cases are supported right now */
6026	switch (sdata->vif.type) {
6027	case NL80211_IFTYPE_STATION:
6028	case NL80211_IFTYPE_AP:
6029	case NL80211_IFTYPE_AP_VLAN:
6030	break;
6031	default:
6032	WARN_ON(1);
6033	return;
6034	}
6035
6036	if (tid != sta->reserved_tid) {
6037	sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
6038	return;
6039	}
6040
6041	sta->reserved_tid = IEEE80211_TID_UNRESERVED;
6042	}
6043	EXPORT_SYMBOL(ieee80211_unreserve_tid);
6044
6045	void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
6046	struct sk_buff *skb, int tid, int link_id,
6047	enum nl80211_band band)
6048	{
6049	const struct ieee80211_hdr *hdr = (void *)skb->data;
6050	int ac = ieee80211_ac_from_tid(tid);
6051	unsigned int link;
6052
6053	skb_reset_mac_header(skb);
6054	skb_set_queue_mapping(skb, queue_mapping: ac);
6055	skb->priority = tid;
6056
6057	skb->dev = sdata->dev;
6058
6059	BUILD_BUG_ON(IEEE80211_LINK_UNSPECIFIED < IEEE80211_MLD_MAX_NUM_LINKS);
6060	BUILD_BUG_ON(!FIELD_FIT(IEEE80211_TX_CTRL_MLO_LINK,
6061	IEEE80211_LINK_UNSPECIFIED));
6062
6063	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
6064	link = 0;
6065	} else if (link_id >= 0) {
6066	link = link_id;
6067	} else if (memcmp(p: sdata->vif.addr, q: hdr->addr2, ETH_ALEN) == 0) {
6068	/* address from the MLD */
6069	link = IEEE80211_LINK_UNSPECIFIED;
6070	} else {
6071	/* otherwise must be addressed from a link */
6072	rcu_read_lock();
6073	for (link = 0; link < ARRAY_SIZE(sdata->vif.link_conf); link++) {
6074	struct ieee80211_bss_conf *link_conf;
6075
6076	link_conf = rcu_dereference(sdata->vif.link_conf[link]);
6077	if (!link_conf)
6078	continue;
6079	if (memcmp(p: link_conf->addr, q: hdr->addr2, ETH_ALEN) == 0)
6080	break;
6081	}
6082	rcu_read_unlock();
6083
6084	if (WARN_ON_ONCE(link == ARRAY_SIZE(sdata->vif.link_conf)))
6085	link = ffs(sdata->vif.active_links) - 1;
6086	}
6087
6088	IEEE80211_SKB_CB(skb)->control.flags |=
6089	u32_encode_bits(v: link, field: IEEE80211_TX_CTRL_MLO_LINK);
6090
6091	/*
6092	* The other path calling ieee80211_xmit is from the tasklet,
6093	* and while we can handle concurrent transmissions locking
6094	* requirements are that we do not come into tx with bhs on.
6095	*/
6096	local_bh_disable();
6097	IEEE80211_SKB_CB(skb)->band = band;
6098	ieee80211_xmit(sdata, NULL, skb);
6099	local_bh_enable();
6100	}
6101
6102	void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
6103	struct sk_buff *skb, int tid, int link_id)
6104	{
6105	struct ieee80211_chanctx_conf *chanctx_conf;
6106	enum nl80211_band band;
6107
6108	rcu_read_lock();
6109	if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
6110	WARN_ON(link_id >= 0);
6111	chanctx_conf =
6112	rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
6113	if (WARN_ON(!chanctx_conf)) {
6114	rcu_read_unlock();
6115	kfree_skb(skb);
6116	return;
6117	}
6118	band = chanctx_conf->def.chan->band;
6119	} else {
6120	WARN_ON(link_id >= 0 &&
6121	!(sdata->vif.active_links & BIT(link_id)));
6122	/* MLD transmissions must not rely on the band */
6123	band = 0;
6124	}
6125
6126	__ieee80211_tx_skb_tid_band(sdata, skb, tid, link_id, band);
6127	rcu_read_unlock();
6128	}
6129
6130	int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
6131	const u8 *buf, size_t len,
6132	const u8 *dest, __be16 proto, bool unencrypted,
6133	int link_id, u64 *cookie)
6134	{
6135	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
6136	struct ieee80211_local *local = sdata->local;
6137	struct sta_info *sta;
6138	struct sk_buff *skb;
6139	struct ethhdr *ehdr;
6140	u32 ctrl_flags = 0;
6141	u32 flags = 0;
6142	int err;
6143
6144	/* mutex lock is only needed for incrementing the cookie counter */
6145	lockdep_assert_wiphy(local->hw.wiphy);
6146
6147	/* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
6148	* or Pre-Authentication
6149	*/
6150	if (proto != sdata->control_port_protocol &&
6151	proto != cpu_to_be16(ETH_P_PREAUTH))
6152	return -EINVAL;
6153
6154	if (proto == sdata->control_port_protocol)
6155	ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
6156	IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
6157
6158	if (unencrypted)
6159	flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
6160
6161	if (cookie)
6162	ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
6163
6164	flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
6165
6166	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom +
6167	sizeof(struct ethhdr) + len);
6168	if (!skb)
6169	return -ENOMEM;
6170
6171	skb_reserve(skb, len: local->hw.extra_tx_headroom + sizeof(struct ethhdr));
6172
6173	skb_put_data(skb, data: buf, len);
6174
6175	ehdr = skb_push(skb, len: sizeof(struct ethhdr));
6176	memcpy(ehdr->h_dest, dest, ETH_ALEN);
6177
6178	/* we may override the SA for MLO STA later */
6179	if (link_id < 0) {
6180	ctrl_flags |= u32_encode_bits(IEEE80211_LINK_UNSPECIFIED,
6181	field: IEEE80211_TX_CTRL_MLO_LINK);
6182	memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
6183	} else {
6184	struct ieee80211_bss_conf *link_conf;
6185
6186	ctrl_flags |= u32_encode_bits(v: link_id,
6187	field: IEEE80211_TX_CTRL_MLO_LINK);
6188
6189	rcu_read_lock();
6190	link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
6191	if (!link_conf) {
6192	dev_kfree_skb(skb);
6193	rcu_read_unlock();
6194	return -ENOLINK;
6195	}
6196	memcpy(ehdr->h_source, link_conf->addr, ETH_ALEN);
6197	rcu_read_unlock();
6198	}
6199
6200	ehdr->h_proto = proto;
6201
6202	skb->dev = dev;
6203	skb->protocol = proto;
6204	skb_reset_network_header(skb);
6205	skb_reset_mac_header(skb);
6206
6207	if (local->hw.queues < IEEE80211_NUM_ACS)
6208	goto start_xmit;
6209
6210	/* update QoS header to prioritize control port frames if possible,
6211	* priorization also happens for control port frames send over
6212	* AF_PACKET
6213	*/
6214	rcu_read_lock();
6215	err = ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta);
6216	if (err) {
6217	dev_kfree_skb(skb);
6218	rcu_read_unlock();
6219	return err;
6220	}
6221
6222	if (!IS_ERR(ptr: sta)) {
6223	u16 queue = ieee80211_select_queue(sdata, sta, skb);
6224
6225	skb_set_queue_mapping(skb, queue_mapping: queue);
6226
6227	/*
6228	* for MLO STA, the SA should be the AP MLD address, but
6229	* the link ID has been selected already
6230	*/
6231	if (sta && sta->sta.mlo)
6232	memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
6233	}
6234	rcu_read_unlock();
6235
6236	start_xmit:
6237	local_bh_disable();
6238	__ieee80211_subif_start_xmit(skb, dev: skb->dev, info_flags: flags, ctrl_flags, cookie);
6239	local_bh_enable();
6240
6241	return 0;
6242	}
6243
6244	int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
6245	const u8 *buf, size_t len)
6246	{
6247	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
6248	struct ieee80211_local *local = sdata->local;
6249	struct sk_buff *skb;
6250
6251	skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + len +
6252	30 + /* header size */
6253	18); /* 11s header size */
6254	if (!skb)
6255	return -ENOMEM;
6256
6257	skb_reserve(skb, len: local->hw.extra_tx_headroom);
6258	skb_put_data(skb, data: buf, len);
6259
6260	skb->dev = dev;
6261	skb->protocol = htons(ETH_P_802_3);
6262	skb_reset_network_header(skb);
6263	skb_reset_mac_header(skb);
6264
6265	local_bh_disable();
6266	__ieee80211_subif_start_xmit(skb, dev: skb->dev, info_flags: 0,
6267	ctrl_flags: IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,
6268	NULL);
6269	local_bh_enable();
6270
6271	return 0;
6272	}
6273