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) 2018-2022 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
42static __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
137 if (r->bitrate > txrate->bitrate)
138 break;
139
140 if ((rate_flags & r->flags) != rate_flags)
141 continue;
142
143 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
144 rate = r->bitrate;
145
146 switch (sband->band) {
147 case NL80211_BAND_2GHZ:
148 case NL80211_BAND_LC: {
149 u32 flag;
150 if (tx->sdata->deflink.operating_11g_mode)
151 flag = IEEE80211_RATE_MANDATORY_G;
152 else
153 flag = IEEE80211_RATE_MANDATORY_B;
154 if (r->flags & flag)
155 mrate = r->bitrate;
156 break;
157 }
158 case NL80211_BAND_5GHZ:
159 case NL80211_BAND_6GHZ:
160 if (r->flags & IEEE80211_RATE_MANDATORY_A)
161 mrate = r->bitrate;
162 break;
163 case NL80211_BAND_S1GHZ:
164 case NL80211_BAND_60GHZ:
165 /* TODO, for now fall through */
166 case NUM_NL80211_BANDS:
167 WARN_ON(1);
168 break;
169 }
170 }
171 if (rate == -1) {
172 /* No matching basic rate found; use highest suitable mandatory
173 * PHY rate */
174 rate = mrate;
175 }
176
177 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
178 if (ieee80211_is_data_qos(fc: hdr->frame_control) &&
179 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
180 dur = 0;
181 else
182 /* Time needed to transmit ACK
183 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
184 * to closest integer */
185 dur = ieee80211_frame_duration(band: sband->band, len: 10, rate, erp,
186 short_preamble: tx->sdata->vif.bss_conf.use_short_preamble);
187
188 if (next_frag_len) {
189 /* Frame is fragmented: duration increases with time needed to
190 * transmit next fragment plus ACK and 2 x SIFS. */
191 dur *= 2; /* ACK + SIFS */
192 /* next fragment */
193 dur += ieee80211_frame_duration(band: sband->band, len: next_frag_len,
194 rate: txrate->bitrate, erp,
195 short_preamble: tx->sdata->vif.bss_conf.use_short_preamble);
196 }
197
198 return cpu_to_le16(dur);
199}
200
201/* tx handlers */
202static ieee80211_tx_result debug_noinline
203ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
204{
205 struct ieee80211_local *local = tx->local;
206 struct ieee80211_if_managed *ifmgd;
207 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
208
209 /* driver doesn't support power save */
210 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
211 return TX_CONTINUE;
212
213 /* hardware does dynamic power save */
214 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
215 return TX_CONTINUE;
216
217 /* dynamic power save disabled */
218 if (local->hw.conf.dynamic_ps_timeout <= 0)
219 return TX_CONTINUE;
220
221 /* we are scanning, don't enable power save */
222 if (local->scanning)
223 return TX_CONTINUE;
224
225 if (!local->ps_sdata)
226 return TX_CONTINUE;
227
228 /* No point if we're going to suspend */
229 if (local->quiescing)
230 return TX_CONTINUE;
231
232 /* dynamic ps is supported only in managed mode */
233 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
234 return TX_CONTINUE;
235
236 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
237 return TX_CONTINUE;
238
239 ifmgd = &tx->sdata->u.mgd;
240
241 /*
242 * Don't wakeup from power save if u-apsd is enabled, voip ac has
243 * u-apsd enabled and the frame is in voip class. This effectively
244 * means that even if all access categories have u-apsd enabled, in
245 * practise u-apsd is only used with the voip ac. This is a
246 * workaround for the case when received voip class packets do not
247 * have correct qos tag for some reason, due the network or the
248 * peer application.
249 *
250 * Note: ifmgd->uapsd_queues access is racy here. If the value is
251 * changed via debugfs, user needs to reassociate manually to have
252 * everything in sync.
253 */
254 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
255 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
256 skb_get_queue_mapping(skb: tx->skb) == IEEE80211_AC_VO)
257 return TX_CONTINUE;
258
259 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
260 ieee80211_stop_queues_by_reason(hw: &local->hw,
261 queues: IEEE80211_MAX_QUEUE_MAP,
262 reason: IEEE80211_QUEUE_STOP_REASON_PS,
263 refcounted: false);
264 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
265 wiphy_work_queue(wiphy: local->hw.wiphy,
266 work: &local->dynamic_ps_disable_work);
267 }
268
269 /* Don't restart the timer if we're not disassociated */
270 if (!ifmgd->associated)
271 return TX_CONTINUE;
272
273 mod_timer(timer: &local->dynamic_ps_timer, expires: jiffies +
274 msecs_to_jiffies(m: local->hw.conf.dynamic_ps_timeout));
275
276 return TX_CONTINUE;
277}
278
279static ieee80211_tx_result debug_noinline
280ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
281{
282
283 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
284 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
285 bool assoc = false;
286
287 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
288 return TX_CONTINUE;
289
290 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
291 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
292 !ieee80211_is_probe_req(fc: hdr->frame_control) &&
293 !ieee80211_is_any_nullfunc(fc: hdr->frame_control))
294 /*
295 * When software scanning only nullfunc frames (to notify
296 * the sleep state to the AP) and probe requests (for the
297 * active scan) are allowed, all other frames should not be
298 * sent and we should not get here, but if we do
299 * nonetheless, drop them to avoid sending them
300 * off-channel. See the link below and
301 * ieee80211_start_scan() for more.
302 *
303 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
304 */
305 return TX_DROP;
306
307 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
308 return TX_CONTINUE;
309
310 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
311 return TX_CONTINUE;
312
313 if (tx->sta)
314 assoc = test_sta_flag(sta: tx->sta, flag: WLAN_STA_ASSOC);
315
316 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
317 if (unlikely(!assoc &&
318 ieee80211_is_data(hdr->frame_control))) {
319#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
320 sdata_info(tx->sdata,
321 "dropped data frame to not associated station %pM\n",
322 hdr->addr1);
323#endif
324 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
325 return TX_DROP;
326 }
327 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
328 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
329 /*
330 * No associated STAs - no need to send multicast
331 * frames.
332 */
333 return TX_DROP;
334 }
335
336 return TX_CONTINUE;
337}
338
339/* This function is called whenever the AP is about to exceed the maximum limit
340 * of buffered frames for power saving STAs. This situation should not really
341 * happen often during normal operation, so dropping the oldest buffered packet
342 * from each queue should be OK to make some room for new frames. */
343static void purge_old_ps_buffers(struct ieee80211_local *local)
344{
345 int total = 0, purged = 0;
346 struct sk_buff *skb;
347 struct ieee80211_sub_if_data *sdata;
348 struct sta_info *sta;
349
350 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
351 struct ps_data *ps;
352
353 if (sdata->vif.type == NL80211_IFTYPE_AP)
354 ps = &sdata->u.ap.ps;
355 else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
356 ps = &sdata->u.mesh.ps;
357 else
358 continue;
359
360 skb = skb_dequeue(list: &ps->bc_buf);
361 if (skb) {
362 purged++;
363 ieee80211_free_txskb(hw: &local->hw, skb);
364 }
365 total += skb_queue_len(list_: &ps->bc_buf);
366 }
367
368 /*
369 * Drop one frame from each station from the lowest-priority
370 * AC that has frames at all.
371 */
372 list_for_each_entry_rcu(sta, &local->sta_list, list) {
373 int ac;
374
375 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
376 skb = skb_dequeue(list: &sta->ps_tx_buf[ac]);
377 total += skb_queue_len(list_: &sta->ps_tx_buf[ac]);
378 if (skb) {
379 purged++;
380 ieee80211_free_txskb(hw: &local->hw, skb);
381 break;
382 }
383 }
384 }
385
386 local->total_ps_buffered = total;
387 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
388}
389
390static ieee80211_tx_result
391ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
392{
393 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
394 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
395 struct ps_data *ps;
396
397 /*
398 * broadcast/multicast frame
399 *
400 * If any of the associated/peer stations is in power save mode,
401 * the frame is buffered to be sent after DTIM beacon frame.
402 * This is done either by the hardware or us.
403 */
404
405 /* powersaving STAs currently only in AP/VLAN/mesh mode */
406 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
407 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
408 if (!tx->sdata->bss)
409 return TX_CONTINUE;
410
411 ps = &tx->sdata->bss->ps;
412 } else if (ieee80211_vif_is_mesh(vif: &tx->sdata->vif)) {
413 ps = &tx->sdata->u.mesh.ps;
414 } else {
415 return TX_CONTINUE;
416 }
417
418
419 /* no buffering for ordered frames */
420 if (ieee80211_has_order(fc: hdr->frame_control))
421 return TX_CONTINUE;
422
423 if (ieee80211_is_probe_req(fc: hdr->frame_control))
424 return TX_CONTINUE;
425
426 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
427 info->hw_queue = tx->sdata->vif.cab_queue;
428
429 /* no stations in PS mode and no buffered packets */
430 if (!atomic_read(v: &ps->num_sta_ps) && skb_queue_empty(list: &ps->bc_buf))
431 return TX_CONTINUE;
432
433 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
434
435 /* device releases frame after DTIM beacon */
436 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
437 return TX_CONTINUE;
438
439 /* buffered in mac80211 */
440 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
441 purge_old_ps_buffers(local: tx->local);
442
443 if (skb_queue_len(list_: &ps->bc_buf) >= AP_MAX_BC_BUFFER) {
444 ps_dbg(tx->sdata,
445 "BC TX buffer full - dropping the oldest frame\n");
446 ieee80211_free_txskb(hw: &tx->local->hw, skb: skb_dequeue(list: &ps->bc_buf));
447 } else
448 tx->local->total_ps_buffered++;
449
450 skb_queue_tail(list: &ps->bc_buf, newsk: tx->skb);
451
452 return TX_QUEUED;
453}
454
455static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
456 struct sk_buff *skb)
457{
458 if (!ieee80211_is_mgmt(fc))
459 return 0;
460
461 if (sta == NULL || !test_sta_flag(sta, flag: WLAN_STA_MFP))
462 return 0;
463
464 if (!ieee80211_is_robust_mgmt_frame(skb))
465 return 0;
466
467 return 1;
468}
469
470static ieee80211_tx_result
471ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
472{
473 struct sta_info *sta = tx->sta;
474 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
475 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
476 struct ieee80211_local *local = tx->local;
477
478 if (unlikely(!sta))
479 return TX_CONTINUE;
480
481 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
482 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
483 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
484 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
485 int ac = skb_get_queue_mapping(skb: tx->skb);
486
487 if (ieee80211_is_mgmt(fc: hdr->frame_control) &&
488 !ieee80211_is_bufferable_mmpdu(skb: tx->skb)) {
489 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
490 return TX_CONTINUE;
491 }
492
493 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
494 sta->sta.addr, sta->sta.aid, ac);
495 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
496 purge_old_ps_buffers(local: tx->local);
497
498 /* sync with ieee80211_sta_ps_deliver_wakeup */
499 spin_lock(lock: &sta->ps_lock);
500 /*
501 * STA woke up the meantime and all the frames on ps_tx_buf have
502 * been queued to pending queue. No reordering can happen, go
503 * ahead and Tx the packet.
504 */
505 if (!test_sta_flag(sta, flag: WLAN_STA_PS_STA) &&
506 !test_sta_flag(sta, flag: WLAN_STA_PS_DRIVER) &&
507 !test_sta_flag(sta, flag: WLAN_STA_PS_DELIVER)) {
508 spin_unlock(lock: &sta->ps_lock);
509 return TX_CONTINUE;
510 }
511
512 if (skb_queue_len(list_: &sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
513 struct sk_buff *old = skb_dequeue(list: &sta->ps_tx_buf[ac]);
514 ps_dbg(tx->sdata,
515 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
516 sta->sta.addr, ac);
517 ieee80211_free_txskb(hw: &local->hw, skb: old);
518 } else
519 tx->local->total_ps_buffered++;
520
521 info->control.jiffies = jiffies;
522 info->control.vif = &tx->sdata->vif;
523 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
524 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
525 skb_queue_tail(list: &sta->ps_tx_buf[ac], newsk: tx->skb);
526 spin_unlock(lock: &sta->ps_lock);
527
528 if (!timer_pending(timer: &local->sta_cleanup))
529 mod_timer(timer: &local->sta_cleanup,
530 expires: round_jiffies(j: jiffies +
531 STA_INFO_CLEANUP_INTERVAL));
532
533 /*
534 * We queued up some frames, so the TIM bit might
535 * need to be set, recalculate it.
536 */
537 sta_info_recalc_tim(sta);
538
539 return TX_QUEUED;
540 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
541 ps_dbg(tx->sdata,
542 "STA %pM in PS mode, but polling/in SP -> send frame\n",
543 sta->sta.addr);
544 }
545
546 return TX_CONTINUE;
547}
548
549static ieee80211_tx_result debug_noinline
550ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
551{
552 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
553 return TX_CONTINUE;
554
555 if (tx->flags & IEEE80211_TX_UNICAST)
556 return ieee80211_tx_h_unicast_ps_buf(tx);
557 else
558 return ieee80211_tx_h_multicast_ps_buf(tx);
559}
560
561static ieee80211_tx_result debug_noinline
562ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
563{
564 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
565
566 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
567 if (tx->sdata->control_port_no_encrypt)
568 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
569 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
570 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
571 }
572
573 return TX_CONTINUE;
574}
575
576static struct ieee80211_key *
577ieee80211_select_link_key(struct ieee80211_tx_data *tx)
578{
579 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
580 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
581 struct ieee80211_link_data *link;
582 unsigned int link_id;
583
584 link_id = u32_get_bits(v: info->control.flags, field: IEEE80211_TX_CTRL_MLO_LINK);
585 if (link_id == IEEE80211_LINK_UNSPECIFIED) {
586 link = &tx->sdata->deflink;
587 } else {
588 link = rcu_dereference(tx->sdata->link[link_id]);
589 if (!link)
590 return NULL;
591 }
592
593 if (ieee80211_is_group_privacy_action(skb: tx->skb))
594 return rcu_dereference(link->default_multicast_key);
595 else if (ieee80211_is_mgmt(fc: hdr->frame_control) &&
596 is_multicast_ether_addr(addr: hdr->addr1) &&
597 ieee80211_is_robust_mgmt_frame(skb: tx->skb))
598 return rcu_dereference(link->default_mgmt_key);
599 else if (is_multicast_ether_addr(addr: hdr->addr1))
600 return rcu_dereference(link->default_multicast_key);
601
602 return NULL;
603}
604
605static ieee80211_tx_result debug_noinline
606ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
607{
608 struct ieee80211_key *key;
609 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
610 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
611
612 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
613 tx->key = NULL;
614 return TX_CONTINUE;
615 }
616
617 if (tx->sta &&
618 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
619 tx->key = key;
620 else if ((key = ieee80211_select_link_key(tx)))
621 tx->key = key;
622 else if (!is_multicast_ether_addr(addr: hdr->addr1) &&
623 (key = rcu_dereference(tx->sdata->default_unicast_key)))
624 tx->key = key;
625 else
626 tx->key = NULL;
627
628 if (tx->key) {
629 bool skip_hw = false;
630
631 /* TODO: add threshold stuff again */
632
633 switch (tx->key->conf.cipher) {
634 case WLAN_CIPHER_SUITE_WEP40:
635 case WLAN_CIPHER_SUITE_WEP104:
636 case WLAN_CIPHER_SUITE_TKIP:
637 if (!ieee80211_is_data_present(fc: hdr->frame_control))
638 tx->key = NULL;
639 break;
640 case WLAN_CIPHER_SUITE_CCMP:
641 case WLAN_CIPHER_SUITE_CCMP_256:
642 case WLAN_CIPHER_SUITE_GCMP:
643 case WLAN_CIPHER_SUITE_GCMP_256:
644 if (!ieee80211_is_data_present(fc: hdr->frame_control) &&
645 !ieee80211_use_mfp(fc: hdr->frame_control, sta: tx->sta,
646 skb: tx->skb) &&
647 !ieee80211_is_group_privacy_action(skb: tx->skb))
648 tx->key = NULL;
649 else
650 skip_hw = (tx->key->conf.flags &
651 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
652 ieee80211_is_mgmt(fc: hdr->frame_control);
653 break;
654 case WLAN_CIPHER_SUITE_AES_CMAC:
655 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
656 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
657 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
658 if (!ieee80211_is_mgmt(fc: hdr->frame_control))
659 tx->key = NULL;
660 break;
661 }
662
663 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
664 !ieee80211_is_deauth(hdr->frame_control)) &&
665 tx->skb->protocol != tx->sdata->control_port_protocol)
666 return TX_DROP;
667
668 if (!skip_hw && tx->key &&
669 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
670 info->control.hw_key = &tx->key->conf;
671 } else if (ieee80211_is_data_present(fc: hdr->frame_control) && tx->sta &&
672 test_sta_flag(sta: tx->sta, flag: WLAN_STA_USES_ENCRYPTION)) {
673 return TX_DROP;
674 }
675
676 return TX_CONTINUE;
677}
678
679static ieee80211_tx_result debug_noinline
680ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
681{
682 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
683 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
684 struct ieee80211_supported_band *sband;
685 u32 len;
686 struct ieee80211_tx_rate_control txrc;
687 struct ieee80211_sta_rates *ratetbl = NULL;
688 bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
689 bool assoc = false;
690
691 memset(&txrc, 0, sizeof(txrc));
692
693 sband = tx->local->hw.wiphy->bands[info->band];
694
695 len = min_t(u32, tx->skb->len + FCS_LEN,
696 tx->local->hw.wiphy->frag_threshold);
697
698 /* set up the tx rate control struct we give the RC algo */
699 txrc.hw = &tx->local->hw;
700 txrc.sband = sband;
701 txrc.bss_conf = &tx->sdata->vif.bss_conf;
702 txrc.skb = tx->skb;
703 txrc.reported_rate.idx = -1;
704 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
705
706 if (tx->sdata->rc_has_mcs_mask[info->band])
707 txrc.rate_idx_mcs_mask =
708 tx->sdata->rc_rateidx_mcs_mask[info->band];
709
710 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
711 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
712 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
713 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
714
715 /* set up RTS protection if desired */
716 if (len > tx->local->hw.wiphy->rts_threshold) {
717 txrc.rts = true;
718 }
719
720 info->control.use_rts = txrc.rts;
721 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
722
723 /*
724 * Use short preamble if the BSS can handle it, but not for
725 * management frames unless we know the receiver can handle
726 * that -- the management frame might be to a station that
727 * just wants a probe response.
728 */
729 if (tx->sdata->vif.bss_conf.use_short_preamble &&
730 (ieee80211_is_tx_data(skb: tx->skb) ||
731 (tx->sta && test_sta_flag(sta: tx->sta, flag: WLAN_STA_SHORT_PREAMBLE))))
732 txrc.short_preamble = true;
733
734 info->control.short_preamble = txrc.short_preamble;
735
736 /* don't ask rate control when rate already injected via radiotap */
737 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
738 return TX_CONTINUE;
739
740 if (tx->sta)
741 assoc = test_sta_flag(sta: tx->sta, flag: WLAN_STA_ASSOC);
742
743 /*
744 * Lets not bother rate control if we're associated and cannot
745 * talk to the sta. This should not happen.
746 */
747 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
748 !rate_usable_index_exists(sband, &tx->sta->sta),
749 "%s: Dropped data frame as no usable bitrate found while "
750 "scanning and associated. Target station: "
751 "%pM on %d GHz band\n",
752 tx->sdata->name,
753 encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
754 info->band ? 5 : 2))
755 return TX_DROP;
756
757 /*
758 * If we're associated with the sta at this point we know we can at
759 * least send the frame at the lowest bit rate.
760 */
761 rate_control_get_rate(sdata: tx->sdata, sta: tx->sta, txrc: &txrc);
762
763 if (tx->sta && !info->control.skip_table)
764 ratetbl = rcu_dereference(tx->sta->sta.rates);
765
766 if (unlikely(info->control.rates[0].idx < 0)) {
767 if (ratetbl) {
768 struct ieee80211_tx_rate rate = {
769 .idx = ratetbl->rate[0].idx,
770 .flags = ratetbl->rate[0].flags,
771 .count = ratetbl->rate[0].count
772 };
773
774 if (ratetbl->rate[0].idx < 0)
775 return TX_DROP;
776
777 tx->rate = rate;
778 } else {
779 return TX_DROP;
780 }
781 } else {
782 tx->rate = info->control.rates[0];
783 }
784
785 if (txrc.reported_rate.idx < 0) {
786 txrc.reported_rate = tx->rate;
787 if (tx->sta && ieee80211_is_tx_data(skb: tx->skb))
788 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
789 } else if (tx->sta)
790 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
791
792 if (ratetbl)
793 return TX_CONTINUE;
794
795 if (unlikely(!info->control.rates[0].count))
796 info->control.rates[0].count = 1;
797
798 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
799 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
800 info->control.rates[0].count = 1;
801
802 return TX_CONTINUE;
803}
804
805static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
806{
807 u16 *seq = &sta->tid_seq[tid];
808 __le16 ret = cpu_to_le16(*seq);
809
810 /* Increase the sequence number. */
811 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
812
813 return ret;
814}
815
816static ieee80211_tx_result debug_noinline
817ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
818{
819 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
820 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
821 int tid;
822
823 /*
824 * Packet injection may want to control the sequence
825 * number, if we have no matching interface then we
826 * neither assign one ourselves nor ask the driver to.
827 */
828 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
829 return TX_CONTINUE;
830
831 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
832 return TX_CONTINUE;
833
834 if (ieee80211_hdrlen(fc: hdr->frame_control) < 24)
835 return TX_CONTINUE;
836
837 if (ieee80211_is_qos_nullfunc(fc: hdr->frame_control))
838 return TX_CONTINUE;
839
840 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
841 return TX_CONTINUE;
842
843 /* SNS11 from 802.11be 10.3.2.14 */
844 if (unlikely(is_multicast_ether_addr(hdr->addr1) &&
845 ieee80211_vif_is_mld(info->control.vif) &&
846 info->control.vif->type == NL80211_IFTYPE_AP)) {
847 if (info->control.flags & IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX)
848 tx->sdata->mld_mcast_seq += 0x10;
849 hdr->seq_ctrl = cpu_to_le16(tx->sdata->mld_mcast_seq);
850 return TX_CONTINUE;
851 }
852
853 /*
854 * Anything but QoS data that has a sequence number field
855 * (is long enough) gets a sequence number from the global
856 * counter. QoS data frames with a multicast destination
857 * also use the global counter (802.11-2012 9.3.2.10).
858 */
859 if (!ieee80211_is_data_qos(fc: hdr->frame_control) ||
860 is_multicast_ether_addr(addr: hdr->addr1)) {
861 /* driver should assign sequence number */
862 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
863 /* for pure STA mode without beacons, we can do it */
864 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
865 tx->sdata->sequence_number += 0x10;
866 if (tx->sta)
867 tx->sta->deflink.tx_stats.msdu[IEEE80211_NUM_TIDS]++;
868 return TX_CONTINUE;
869 }
870
871 /*
872 * This should be true for injected/management frames only, for
873 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
874 * above since they are not QoS-data frames.
875 */
876 if (!tx->sta)
877 return TX_CONTINUE;
878
879 /* include per-STA, per-TID sequence counter */
880 tid = ieee80211_get_tid(hdr);
881 tx->sta->deflink.tx_stats.msdu[tid]++;
882
883 hdr->seq_ctrl = ieee80211_tx_next_seq(sta: tx->sta, tid);
884
885 return TX_CONTINUE;
886}
887
888static int ieee80211_fragment(struct ieee80211_tx_data *tx,
889 struct sk_buff *skb, int hdrlen,
890 int frag_threshold)
891{
892 struct ieee80211_local *local = tx->local;
893 struct ieee80211_tx_info *info;
894 struct sk_buff *tmp;
895 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
896 int pos = hdrlen + per_fragm;
897 int rem = skb->len - hdrlen - per_fragm;
898
899 if (WARN_ON(rem < 0))
900 return -EINVAL;
901
902 /* first fragment was already added to queue by caller */
903
904 while (rem) {
905 int fraglen = per_fragm;
906
907 if (fraglen > rem)
908 fraglen = rem;
909 rem -= fraglen;
910 tmp = dev_alloc_skb(length: local->tx_headroom +
911 frag_threshold +
912 IEEE80211_ENCRYPT_HEADROOM +
913 IEEE80211_ENCRYPT_TAILROOM);
914 if (!tmp)
915 return -ENOMEM;
916
917 __skb_queue_tail(list: &tx->skbs, newsk: tmp);
918
919 skb_reserve(skb: tmp,
920 len: local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM);
921
922 /* copy control information */
923 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
924
925 info = IEEE80211_SKB_CB(skb: tmp);
926 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
927 IEEE80211_TX_CTL_FIRST_FRAGMENT);
928
929 if (rem)
930 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
931
932 skb_copy_queue_mapping(to: tmp, from: skb);
933 tmp->priority = skb->priority;
934 tmp->dev = skb->dev;
935
936 /* copy header and data */
937 skb_put_data(skb: tmp, data: skb->data, len: hdrlen);
938 skb_put_data(skb: tmp, data: skb->data + pos, len: fraglen);
939
940 pos += fraglen;
941 }
942
943 /* adjust first fragment's length */
944 skb_trim(skb, len: hdrlen + per_fragm);
945 return 0;
946}
947
948static ieee80211_tx_result debug_noinline
949ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
950{
951 struct sk_buff *skb = tx->skb;
952 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
953 struct ieee80211_hdr *hdr = (void *)skb->data;
954 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
955 int hdrlen;
956 int fragnum;
957
958 /* no matter what happens, tx->skb moves to tx->skbs */
959 __skb_queue_tail(list: &tx->skbs, newsk: skb);
960 tx->skb = NULL;
961
962 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
963 return TX_CONTINUE;
964
965 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
966 return TX_CONTINUE;
967
968 /*
969 * Warn when submitting a fragmented A-MPDU frame and drop it.
970 * This scenario is handled in ieee80211_tx_prepare but extra
971 * caution taken here as fragmented ampdu may cause Tx stop.
972 */
973 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
974 return TX_DROP;
975
976 hdrlen = ieee80211_hdrlen(fc: hdr->frame_control);
977
978 /* internal error, why isn't DONTFRAG set? */
979 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
980 return TX_DROP;
981
982 /*
983 * Now fragment the frame. This will allocate all the fragments and
984 * chain them (using skb as the first fragment) to skb->next.
985 * During transmission, we will remove the successfully transmitted
986 * fragments from this list. When the low-level driver rejects one
987 * of the fragments then we will simply pretend to accept the skb
988 * but store it away as pending.
989 */
990 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
991 return TX_DROP;
992
993 /* update duration/seq/flags of fragments */
994 fragnum = 0;
995
996 skb_queue_walk(&tx->skbs, skb) {
997 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
998
999 hdr = (void *)skb->data;
1000 info = IEEE80211_SKB_CB(skb);
1001
1002 if (!skb_queue_is_last(list: &tx->skbs, skb)) {
1003 hdr->frame_control |= morefrags;
1004 /*
1005 * No multi-rate retries for fragmented frames, that
1006 * would completely throw off the NAV at other STAs.
1007 */
1008 info->control.rates[1].idx = -1;
1009 info->control.rates[2].idx = -1;
1010 info->control.rates[3].idx = -1;
1011 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
1012 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
1013 } else {
1014 hdr->frame_control &= ~morefrags;
1015 }
1016 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
1017 fragnum++;
1018 }
1019
1020 return TX_CONTINUE;
1021}
1022
1023static ieee80211_tx_result debug_noinline
1024ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1025{
1026 struct sk_buff *skb;
1027 int ac = -1;
1028
1029 if (!tx->sta)
1030 return TX_CONTINUE;
1031
1032 skb_queue_walk(&tx->skbs, skb) {
1033 ac = skb_get_queue_mapping(skb);
1034 tx->sta->deflink.tx_stats.bytes[ac] += skb->len;
1035 }
1036 if (ac >= 0)
1037 tx->sta->deflink.tx_stats.packets[ac]++;
1038
1039 return TX_CONTINUE;
1040}
1041
1042static ieee80211_tx_result debug_noinline
1043ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1044{
1045 if (!tx->key)
1046 return TX_CONTINUE;
1047
1048 switch (tx->key->conf.cipher) {
1049 case WLAN_CIPHER_SUITE_WEP40:
1050 case WLAN_CIPHER_SUITE_WEP104:
1051 return ieee80211_crypto_wep_encrypt(tx);
1052 case WLAN_CIPHER_SUITE_TKIP:
1053 return ieee80211_crypto_tkip_encrypt(tx);
1054 case WLAN_CIPHER_SUITE_CCMP:
1055 return ieee80211_crypto_ccmp_encrypt(
1056 tx, IEEE80211_CCMP_MIC_LEN);
1057 case WLAN_CIPHER_SUITE_CCMP_256:
1058 return ieee80211_crypto_ccmp_encrypt(
1059 tx, IEEE80211_CCMP_256_MIC_LEN);
1060 case WLAN_CIPHER_SUITE_AES_CMAC:
1061 return ieee80211_crypto_aes_cmac_encrypt(tx);
1062 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1063 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
1064 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1065 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1066 return ieee80211_crypto_aes_gmac_encrypt(tx);
1067 case WLAN_CIPHER_SUITE_GCMP:
1068 case WLAN_CIPHER_SUITE_GCMP_256:
1069 return ieee80211_crypto_gcmp_encrypt(tx);
1070 }
1071
1072 return TX_DROP;
1073}
1074
1075static ieee80211_tx_result debug_noinline
1076ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1077{
1078 struct sk_buff *skb;
1079 struct ieee80211_hdr *hdr;
1080 int next_len;
1081 bool group_addr;
1082
1083 skb_queue_walk(&tx->skbs, skb) {
1084 hdr = (void *) skb->data;
1085 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1086 break; /* must not overwrite AID */
1087 if (!skb_queue_is_last(list: &tx->skbs, skb)) {
1088 struct sk_buff *next = skb_queue_next(list: &tx->skbs, skb);
1089 next_len = next->len;
1090 } else
1091 next_len = 0;
1092 group_addr = is_multicast_ether_addr(addr: hdr->addr1);
1093
1094 hdr->duration_id =
1095 ieee80211_duration(tx, skb, group_addr, next_frag_len: next_len);
1096 }
1097
1098 return TX_CONTINUE;
1099}
1100
1101/* actual transmit path */
1102
1103static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1104 struct sk_buff *skb,
1105 struct ieee80211_tx_info *info,
1106 struct tid_ampdu_tx *tid_tx,
1107 int tid)
1108{
1109 bool queued = false;
1110 bool reset_agg_timer = false;
1111 struct sk_buff *purge_skb = NULL;
1112
1113 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1114 reset_agg_timer = true;
1115 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1116 /*
1117 * nothing -- this aggregation session is being started
1118 * but that might still fail with the driver
1119 */
1120 } else if (!tx->sta->sta.txq[tid]) {
1121 spin_lock(lock: &tx->sta->lock);
1122 /*
1123 * Need to re-check now, because we may get here
1124 *
1125 * 1) in the window during which the setup is actually
1126 * already done, but not marked yet because not all
1127 * packets are spliced over to the driver pending
1128 * queue yet -- if this happened we acquire the lock
1129 * either before or after the splice happens, but
1130 * need to recheck which of these cases happened.
1131 *
1132 * 2) during session teardown, if the OPERATIONAL bit
1133 * was cleared due to the teardown but the pointer
1134 * hasn't been assigned NULL yet (or we loaded it
1135 * before it was assigned) -- in this case it may
1136 * now be NULL which means we should just let the
1137 * packet pass through because splicing the frames
1138 * back is already done.
1139 */
1140 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
1141
1142 if (!tid_tx) {
1143 /* do nothing, let packet pass through */
1144 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1145 reset_agg_timer = true;
1146 } else {
1147 queued = true;
1148 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1149 clear_sta_flag(sta: tx->sta, flag: WLAN_STA_SP);
1150 ps_dbg(tx->sta->sdata,
1151 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1152 tx->sta->sta.addr, tx->sta->sta.aid);
1153 }
1154 info->control.vif = &tx->sdata->vif;
1155 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1156 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
1157 __skb_queue_tail(list: &tid_tx->pending, newsk: skb);
1158 if (skb_queue_len(list_: &tid_tx->pending) > STA_MAX_TX_BUFFER)
1159 purge_skb = __skb_dequeue(list: &tid_tx->pending);
1160 }
1161 spin_unlock(lock: &tx->sta->lock);
1162
1163 if (purge_skb)
1164 ieee80211_free_txskb(hw: &tx->local->hw, skb: purge_skb);
1165 }
1166
1167 /* reset session timer */
1168 if (reset_agg_timer)
1169 tid_tx->last_tx = jiffies;
1170
1171 return queued;
1172}
1173
1174void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
1175 struct sta_info *sta, struct sk_buff *skb)
1176{
1177 struct rate_control_ref *ref = sdata->local->rate_ctrl;
1178 u16 tid;
1179
1180 if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
1181 return;
1182
1183 if (!sta || !sta->sta.deflink.ht_cap.ht_supported ||
1184 !sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
1185 skb->protocol == sdata->control_port_protocol)
1186 return;
1187
1188 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1189 if (likely(sta->ampdu_mlme.tid_tx[tid]))
1190 return;
1191
1192 ieee80211_start_tx_ba_session(sta: &sta->sta, tid, timeout: 0);
1193}
1194
1195/*
1196 * initialises @tx
1197 * pass %NULL for the station if unknown, a valid pointer if known
1198 * or an ERR_PTR() if the station is known not to exist
1199 */
1200static ieee80211_tx_result
1201ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1202 struct ieee80211_tx_data *tx,
1203 struct sta_info *sta, struct sk_buff *skb)
1204{
1205 struct ieee80211_local *local = sdata->local;
1206 struct ieee80211_hdr *hdr;
1207 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1208 bool aggr_check = false;
1209 int tid;
1210
1211 memset(tx, 0, sizeof(*tx));
1212 tx->skb = skb;
1213 tx->local = local;
1214 tx->sdata = sdata;
1215 __skb_queue_head_init(list: &tx->skbs);
1216
1217 /*
1218 * If this flag is set to true anywhere, and we get here,
1219 * we are doing the needed processing, so remove the flag
1220 * now.
1221 */
1222 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1223
1224 hdr = (struct ieee80211_hdr *) skb->data;
1225
1226 if (likely(sta)) {
1227 if (!IS_ERR(ptr: sta))
1228 tx->sta = sta;
1229 } else {
1230 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1231 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1232 if (!tx->sta && sdata->wdev.use_4addr)
1233 return TX_DROP;
1234 } else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
1235 tx->sta = sta_info_get_bss(sdata, addr: hdr->addr1);
1236 }
1237 if (!tx->sta && !is_multicast_ether_addr(addr: hdr->addr1)) {
1238 tx->sta = sta_info_get(sdata, addr: hdr->addr1);
1239 aggr_check = true;
1240 }
1241 }
1242
1243 if (tx->sta && ieee80211_is_data_qos(fc: hdr->frame_control) &&
1244 !ieee80211_is_qos_nullfunc(fc: hdr->frame_control) &&
1245 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1246 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
1247 struct tid_ampdu_tx *tid_tx;
1248
1249 tid = ieee80211_get_tid(hdr);
1250 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1251 if (!tid_tx && aggr_check) {
1252 ieee80211_aggr_check(sdata, sta: tx->sta, skb);
1253 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1254 }
1255
1256 if (tid_tx) {
1257 bool queued;
1258
1259 queued = ieee80211_tx_prep_agg(tx, skb, info,
1260 tid_tx, tid);
1261
1262 if (unlikely(queued))
1263 return TX_QUEUED;
1264 }
1265 }
1266
1267 if (is_multicast_ether_addr(addr: hdr->addr1)) {
1268 tx->flags &= ~IEEE80211_TX_UNICAST;
1269 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1270 } else
1271 tx->flags |= IEEE80211_TX_UNICAST;
1272
1273 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1274 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1275 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1276 info->flags & IEEE80211_TX_CTL_AMPDU)
1277 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
1278 }
1279
1280 if (!tx->sta)
1281 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1282 else if (test_and_clear_sta_flag(sta: tx->sta, flag: WLAN_STA_CLEAR_PS_FILT)) {
1283 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
1284 ieee80211_check_fast_xmit(sta: tx->sta);
1285 }
1286
1287 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
1288
1289 return TX_CONTINUE;
1290}
1291
1292static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1293 struct ieee80211_vif *vif,
1294 struct sta_info *sta,
1295 struct sk_buff *skb)
1296{
1297 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1298 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1299 struct ieee80211_txq *txq = NULL;
1300
1301 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1302 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
1303 return NULL;
1304
1305 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
1306 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
1307 if ((!ieee80211_is_mgmt(fc: hdr->frame_control) ||
1308 ieee80211_is_bufferable_mmpdu(skb) ||
1309 vif->type == NL80211_IFTYPE_STATION) &&
1310 sta && sta->uploaded) {
1311 /*
1312 * This will be NULL if the driver didn't set the
1313 * opt-in hardware flag.
1314 */
1315 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1316 }
1317 } else if (sta) {
1318 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1319
1320 if (!sta->uploaded)
1321 return NULL;
1322
1323 txq = sta->sta.txq[tid];
1324 } else {
1325 txq = vif->txq;
1326 }
1327
1328 if (!txq)
1329 return NULL;
1330
1331 return to_txq_info(txq);
1332}
1333
1334static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1335{
1336 struct sk_buff *next;
1337 codel_time_t now = codel_get_time();
1338
1339 skb_list_walk_safe(skb, skb, next)
1340 IEEE80211_SKB_CB(skb)->control.enqueue_time = now;
1341}
1342
1343static u32 codel_skb_len_func(const struct sk_buff *skb)
1344{
1345 return skb->len;
1346}
1347
1348static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1349{
1350 const struct ieee80211_tx_info *info;
1351
1352 info = (const struct ieee80211_tx_info *)skb->cb;
1353 return info->control.enqueue_time;
1354}
1355
1356static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1357 void *ctx)
1358{
1359 struct ieee80211_local *local;
1360 struct txq_info *txqi;
1361 struct fq *fq;
1362 struct fq_flow *flow;
1363
1364 txqi = ctx;
1365 local = vif_to_sdata(p: txqi->txq.vif)->local;
1366 fq = &local->fq;
1367
1368 if (cvars == &txqi->def_cvars)
1369 flow = &txqi->tin.default_flow;
1370 else
1371 flow = &fq->flows[cvars - local->cvars];
1372
1373 return fq_flow_dequeue(fq, flow);
1374}
1375
1376static void codel_drop_func(struct sk_buff *skb,
1377 void *ctx)
1378{
1379 struct ieee80211_local *local;
1380 struct ieee80211_hw *hw;
1381 struct txq_info *txqi;
1382
1383 txqi = ctx;
1384 local = vif_to_sdata(p: txqi->txq.vif)->local;
1385 hw = &local->hw;
1386
1387 ieee80211_free_txskb(hw, skb);
1388}
1389
1390static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1391 struct fq_tin *tin,
1392 struct fq_flow *flow)
1393{
1394 struct ieee80211_local *local;
1395 struct txq_info *txqi;
1396 struct codel_vars *cvars;
1397 struct codel_params *cparams;
1398 struct codel_stats *cstats;
1399
1400 local = container_of(fq, struct ieee80211_local, fq);
1401 txqi = container_of(tin, struct txq_info, tin);
1402 cstats = &txqi->cstats;
1403
1404 if (txqi->txq.sta) {
1405 struct sta_info *sta = container_of(txqi->txq.sta,
1406 struct sta_info, sta);
1407 cparams = &sta->cparams;
1408 } else {
1409 cparams = &local->cparams;
1410 }
1411
1412 if (flow == &tin->default_flow)
1413 cvars = &txqi->def_cvars;
1414 else
1415 cvars = &local->cvars[flow - fq->flows];
1416
1417 return codel_dequeue(ctx: txqi,
1418 backlog: &flow->backlog,
1419 params: cparams,
1420 vars: cvars,
1421 stats: cstats,
1422 skb_len_func: codel_skb_len_func,
1423 skb_time_func: codel_skb_time_func,
1424 drop_func: codel_drop_func,
1425 dequeue_func: codel_dequeue_func);
1426}
1427
1428static void fq_skb_free_func(struct fq *fq,
1429 struct fq_tin *tin,
1430 struct fq_flow *flow,
1431 struct sk_buff *skb)
1432{
1433 struct ieee80211_local *local;
1434
1435 local = container_of(fq, struct ieee80211_local, fq);
1436 ieee80211_free_txskb(hw: &local->hw, skb);
1437}
1438
1439static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1440 struct txq_info *txqi,
1441 struct sk_buff *skb)
1442{
1443 struct fq *fq = &local->fq;
1444 struct fq_tin *tin = &txqi->tin;
1445 u32 flow_idx = fq_flow_idx(fq, skb);
1446
1447 ieee80211_set_skb_enqueue_time(skb);
1448
1449 spin_lock_bh(lock: &fq->lock);
1450 /*
1451 * For management frames, don't really apply codel etc.,
1452 * we don't want to apply any shaping or anything we just
1453 * want to simplify the driver API by having them on the
1454 * txqi.
1455 */
1456 if (unlikely(txqi->txq.tid == IEEE80211_NUM_TIDS)) {
1457 IEEE80211_SKB_CB(skb)->control.flags |=
1458 IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
1459 __skb_queue_tail(list: &txqi->frags, newsk: skb);
1460 } else {
1461 fq_tin_enqueue(fq, tin, idx: flow_idx, skb,
1462 free_func: fq_skb_free_func);
1463 }
1464 spin_unlock_bh(lock: &fq->lock);
1465}
1466
1467static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1468 struct fq_flow *flow, struct sk_buff *skb,
1469 void *data)
1470{
1471 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1472
1473 return info->control.vif == data;
1474}
1475
1476void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1477 struct ieee80211_sub_if_data *sdata)
1478{
1479 struct fq *fq = &local->fq;
1480 struct txq_info *txqi;
1481 struct fq_tin *tin;
1482 struct ieee80211_sub_if_data *ap;
1483
1484 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1485 return;
1486
1487 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1488
1489 if (!ap->vif.txq)
1490 return;
1491
1492 txqi = to_txq_info(txq: ap->vif.txq);
1493 tin = &txqi->tin;
1494
1495 spin_lock_bh(lock: &fq->lock);
1496 fq_tin_filter(fq, tin, filter_func: fq_vlan_filter_func, filter_data: &sdata->vif,
1497 free_func: fq_skb_free_func);
1498 spin_unlock_bh(lock: &fq->lock);
1499}
1500
1501void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1502 struct sta_info *sta,
1503 struct txq_info *txqi, int tid)
1504{
1505 fq_tin_init(tin: &txqi->tin);
1506 codel_vars_init(vars: &txqi->def_cvars);
1507 codel_stats_init(stats: &txqi->cstats);
1508 __skb_queue_head_init(list: &txqi->frags);
1509 INIT_LIST_HEAD(list: &txqi->schedule_order);
1510
1511 txqi->txq.vif = &sdata->vif;
1512
1513 if (!sta) {
1514 sdata->vif.txq = &txqi->txq;
1515 txqi->txq.tid = 0;
1516 txqi->txq.ac = IEEE80211_AC_BE;
1517
1518 return;
1519 }
1520
1521 if (tid == IEEE80211_NUM_TIDS) {
1522 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1523 /* Drivers need to opt in to the management MPDU TXQ */
1524 if (!ieee80211_hw_check(&sdata->local->hw,
1525 STA_MMPDU_TXQ))
1526 return;
1527 } else if (!ieee80211_hw_check(&sdata->local->hw,
1528 BUFF_MMPDU_TXQ)) {
1529 /* Drivers need to opt in to the bufferable MMPDU TXQ */
1530 return;
1531 }
1532 txqi->txq.ac = IEEE80211_AC_VO;
1533 } else {
1534 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1535 }
1536
1537 txqi->txq.sta = &sta->sta;
1538 txqi->txq.tid = tid;
1539 sta->sta.txq[tid] = &txqi->txq;
1540}
1541
1542void ieee80211_txq_purge(struct ieee80211_local *local,
1543 struct txq_info *txqi)
1544{
1545 struct fq *fq = &local->fq;
1546 struct fq_tin *tin = &txqi->tin;
1547
1548 spin_lock_bh(lock: &fq->lock);
1549 fq_tin_reset(fq, tin, free_func: fq_skb_free_func);
1550 ieee80211_purge_tx_queue(hw: &local->hw, skbs: &txqi->frags);
1551 spin_unlock_bh(lock: &fq->lock);
1552
1553 spin_lock_bh(lock: &local->active_txq_lock[txqi->txq.ac]);
1554 list_del_init(entry: &txqi->schedule_order);
1555 spin_unlock_bh(lock: &local->active_txq_lock[txqi->txq.ac]);
1556}
1557
1558void ieee80211_txq_set_params(struct ieee80211_local *local)
1559{
1560 if (local->hw.wiphy->txq_limit)
1561 local->fq.limit = local->hw.wiphy->txq_limit;
1562 else
1563 local->hw.wiphy->txq_limit = local->fq.limit;
1564
1565 if (local->hw.wiphy->txq_memory_limit)
1566 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1567 else
1568 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1569
1570 if (local->hw.wiphy->txq_quantum)
1571 local->fq.quantum = local->hw.wiphy->txq_quantum;
1572 else
1573 local->hw.wiphy->txq_quantum = local->fq.quantum;
1574}
1575
1576int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1577{
1578 struct fq *fq = &local->fq;
1579 int ret;
1580 int i;
1581 bool supp_vht = false;
1582 enum nl80211_band band;
1583
1584 ret = fq_init(fq, flows_cnt: 4096);
1585 if (ret)
1586 return ret;
1587
1588 /*
1589 * If the hardware doesn't support VHT, it is safe to limit the maximum
1590 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1591 */
1592 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1593 struct ieee80211_supported_band *sband;
1594
1595 sband = local->hw.wiphy->bands[band];
1596 if (!sband)
1597 continue;
1598
1599 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1600 }
1601
1602 if (!supp_vht)
1603 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1604
1605 codel_params_init(params: &local->cparams);
1606 local->cparams.interval = MS2TIME(100);
1607 local->cparams.target = MS2TIME(20);
1608 local->cparams.ecn = true;
1609
1610 local->cvars = kcalloc(n: fq->flows_cnt, size: sizeof(local->cvars[0]),
1611 GFP_KERNEL);
1612 if (!local->cvars) {
1613 spin_lock_bh(lock: &fq->lock);
1614 fq_reset(fq, free_func: fq_skb_free_func);
1615 spin_unlock_bh(lock: &fq->lock);
1616 return -ENOMEM;
1617 }
1618
1619 for (i = 0; i < fq->flows_cnt; i++)
1620 codel_vars_init(vars: &local->cvars[i]);
1621
1622 ieee80211_txq_set_params(local);
1623
1624 return 0;
1625}
1626
1627void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1628{
1629 struct fq *fq = &local->fq;
1630
1631 kfree(objp: local->cvars);
1632 local->cvars = NULL;
1633
1634 spin_lock_bh(lock: &fq->lock);
1635 fq_reset(fq, free_func: fq_skb_free_func);
1636 spin_unlock_bh(lock: &fq->lock);
1637}
1638
1639static bool ieee80211_queue_skb(struct ieee80211_local *local,
1640 struct ieee80211_sub_if_data *sdata,
1641 struct sta_info *sta,
1642 struct sk_buff *skb)
1643{
1644 struct ieee80211_vif *vif;
1645 struct txq_info *txqi;
1646
1647 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1648 return false;
1649
1650 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1651 sdata = container_of(sdata->bss,
1652 struct ieee80211_sub_if_data, u.ap);
1653
1654 vif = &sdata->vif;
1655 txqi = ieee80211_get_txq(local, vif, sta, skb);
1656
1657 if (!txqi)
1658 return false;
1659
1660 ieee80211_txq_enqueue(local, txqi, skb);
1661
1662 schedule_and_wake_txq(local, txqi);
1663
1664 return true;
1665}
1666
1667static bool ieee80211_tx_frags(struct ieee80211_local *local,
1668 struct ieee80211_vif *vif,
1669 struct sta_info *sta,
1670 struct sk_buff_head *skbs,
1671 bool txpending)
1672{
1673 struct ieee80211_tx_control control = {};
1674 struct sk_buff *skb, *tmp;
1675 unsigned long flags;
1676
1677 skb_queue_walk_safe(skbs, skb, tmp) {
1678 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1679 int q = info->hw_queue;
1680
1681#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1682 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1683 __skb_unlink(skb, list: skbs);
1684 ieee80211_free_txskb(hw: &local->hw, skb);
1685 continue;
1686 }
1687#endif
1688
1689 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1690 if (local->queue_stop_reasons[q] ||
1691 (!txpending && !skb_queue_empty(list: &local->pending[q]))) {
1692 if (unlikely(info->flags &
1693 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1694 if (local->queue_stop_reasons[q] &
1695 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1696 /*
1697 * Drop off-channel frames if queues
1698 * are stopped for any reason other
1699 * than off-channel operation. Never
1700 * queue them.
1701 */
1702 spin_unlock_irqrestore(
1703 lock: &local->queue_stop_reason_lock,
1704 flags);
1705 ieee80211_purge_tx_queue(hw: &local->hw,
1706 skbs);
1707 return true;
1708 }
1709 } else {
1710
1711 /*
1712 * Since queue is stopped, queue up frames for
1713 * later transmission from the tx-pending
1714 * tasklet when the queue is woken again.
1715 */
1716 if (txpending)
1717 skb_queue_splice_init(list: skbs,
1718 head: &local->pending[q]);
1719 else
1720 skb_queue_splice_tail_init(list: skbs,
1721 head: &local->pending[q]);
1722
1723 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock,
1724 flags);
1725 return false;
1726 }
1727 }
1728 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
1729
1730 info->control.vif = vif;
1731 control.sta = sta ? &sta->sta : NULL;
1732
1733 __skb_unlink(skb, list: skbs);
1734 drv_tx(local, control: &control, skb);
1735 }
1736
1737 return true;
1738}
1739
1740/*
1741 * Returns false if the frame couldn't be transmitted but was queued instead.
1742 */
1743static bool __ieee80211_tx(struct ieee80211_local *local,
1744 struct sk_buff_head *skbs, struct sta_info *sta,
1745 bool txpending)
1746{
1747 struct ieee80211_tx_info *info;
1748 struct ieee80211_sub_if_data *sdata;
1749 struct ieee80211_vif *vif;
1750 struct sk_buff *skb;
1751 bool result;
1752
1753 if (WARN_ON(skb_queue_empty(skbs)))
1754 return true;
1755
1756 skb = skb_peek(list_: skbs);
1757 info = IEEE80211_SKB_CB(skb);
1758 sdata = vif_to_sdata(p: info->control.vif);
1759 if (sta && !sta->uploaded)
1760 sta = NULL;
1761
1762 switch (sdata->vif.type) {
1763 case NL80211_IFTYPE_MONITOR:
1764 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1765 vif = &sdata->vif;
1766 break;
1767 }
1768 sdata = rcu_dereference(local->monitor_sdata);
1769 if (sdata) {
1770 vif = &sdata->vif;
1771 info->hw_queue =
1772 vif->hw_queue[skb_get_queue_mapping(skb)];
1773 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
1774 ieee80211_purge_tx_queue(hw: &local->hw, skbs);
1775 return true;
1776 } else
1777 vif = NULL;
1778 break;
1779 case NL80211_IFTYPE_AP_VLAN:
1780 sdata = container_of(sdata->bss,
1781 struct ieee80211_sub_if_data, u.ap);
1782 fallthrough;
1783 default:
1784 vif = &sdata->vif;
1785 break;
1786 }
1787
1788 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
1789
1790 WARN_ON_ONCE(!skb_queue_empty(skbs));
1791
1792 return result;
1793}
1794
1795/*
1796 * Invoke TX handlers, return 0 on success and non-zero if the
1797 * frame was dropped or queued.
1798 *
1799 * The handlers are split into an early and late part. The latter is everything
1800 * that can be sensitive to reordering, and will be deferred to after packets
1801 * are dequeued from the intermediate queues (when they are enabled).
1802 */
1803static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
1804{
1805 ieee80211_tx_result res = TX_DROP;
1806
1807#define CALL_TXH(txh) \
1808 do { \
1809 res = txh(tx); \
1810 if (res != TX_CONTINUE) \
1811 goto txh_done; \
1812 } while (0)
1813
1814 CALL_TXH(ieee80211_tx_h_dynamic_ps);
1815 CALL_TXH(ieee80211_tx_h_check_assoc);
1816 CALL_TXH(ieee80211_tx_h_ps_buf);
1817 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
1818 CALL_TXH(ieee80211_tx_h_select_key);
1819
1820 txh_done:
1821 if (unlikely(res == TX_DROP)) {
1822 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1823 if (tx->skb)
1824 ieee80211_free_txskb(hw: &tx->local->hw, skb: tx->skb);
1825 else
1826 ieee80211_purge_tx_queue(hw: &tx->local->hw, skbs: &tx->skbs);
1827 return -1;
1828 } else if (unlikely(res == TX_QUEUED)) {
1829 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1830 return -1;
1831 }
1832
1833 return 0;
1834}
1835
1836/*
1837 * Late handlers can be called while the sta lock is held. Handlers that can
1838 * cause packets to be generated will cause deadlock!
1839 */
1840static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1841{
1842 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb: tx->skb);
1843 ieee80211_tx_result res = TX_CONTINUE;
1844
1845 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1846 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1847
1848 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1849 __skb_queue_tail(list: &tx->skbs, newsk: tx->skb);
1850 tx->skb = NULL;
1851 goto txh_done;
1852 }
1853
1854 CALL_TXH(ieee80211_tx_h_michael_mic_add);
1855 CALL_TXH(ieee80211_tx_h_sequence);
1856 CALL_TXH(ieee80211_tx_h_fragment);
1857 /* handlers after fragment must be aware of tx info fragmentation! */
1858 CALL_TXH(ieee80211_tx_h_stats);
1859 CALL_TXH(ieee80211_tx_h_encrypt);
1860 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1861 CALL_TXH(ieee80211_tx_h_calculate_duration);
1862#undef CALL_TXH
1863
1864 txh_done:
1865 if (unlikely(res == TX_DROP)) {
1866 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1867 if (tx->skb)
1868 ieee80211_free_txskb(hw: &tx->local->hw, skb: tx->skb);
1869 else
1870 ieee80211_purge_tx_queue(hw: &tx->local->hw, skbs: &tx->skbs);
1871 return -1;
1872 } else if (unlikely(res == TX_QUEUED)) {
1873 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1874 return -1;
1875 }
1876
1877 return 0;
1878}
1879
1880static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1881{
1882 int r = invoke_tx_handlers_early(tx);
1883
1884 if (r)
1885 return r;
1886 return invoke_tx_handlers_late(tx);
1887}
1888
1889bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1890 struct ieee80211_vif *vif, struct sk_buff *skb,
1891 int band, struct ieee80211_sta **sta)
1892{
1893 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
1894 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1895 struct ieee80211_tx_data tx;
1896 struct sk_buff *skb2;
1897
1898 if (ieee80211_tx_prepare(sdata, tx: &tx, NULL, skb) == TX_DROP)
1899 return false;
1900
1901 info->band = band;
1902 info->control.vif = vif;
1903 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1904
1905 if (invoke_tx_handlers(tx: &tx))
1906 return false;
1907
1908 if (sta) {
1909 if (tx.sta)
1910 *sta = &tx.sta->sta;
1911 else
1912 *sta = NULL;
1913 }
1914
1915 /* this function isn't suitable for fragmented data frames */
1916 skb2 = __skb_dequeue(list: &tx.skbs);
1917 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1918 ieee80211_free_txskb(hw, skb: skb2);
1919 ieee80211_purge_tx_queue(hw, skbs: &tx.skbs);
1920 return false;
1921 }
1922
1923 return true;
1924}
1925EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1926
1927/*
1928 * Returns false if the frame couldn't be transmitted but was queued instead.
1929 */
1930static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
1931 struct sta_info *sta, struct sk_buff *skb,
1932 bool txpending)
1933{
1934 struct ieee80211_local *local = sdata->local;
1935 struct ieee80211_tx_data tx;
1936 ieee80211_tx_result res_prepare;
1937 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1938 bool result = true;
1939
1940 if (unlikely(skb->len < 10)) {
1941 dev_kfree_skb(skb);
1942 return true;
1943 }
1944
1945 /* initialises tx */
1946 res_prepare = ieee80211_tx_prepare(sdata, tx: &tx, sta, skb);
1947
1948 if (unlikely(res_prepare == TX_DROP)) {
1949 ieee80211_free_txskb(hw: &local->hw, skb);
1950 return true;
1951 } else if (unlikely(res_prepare == TX_QUEUED)) {
1952 return true;
1953 }
1954
1955 /* set up hw_queue value early */
1956 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
1957 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1958 info->hw_queue =
1959 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1960
1961 if (invoke_tx_handlers_early(tx: &tx))
1962 return true;
1963
1964 if (ieee80211_queue_skb(local, sdata, sta: tx.sta, skb: tx.skb))
1965 return true;
1966
1967 if (!invoke_tx_handlers_late(tx: &tx))
1968 result = __ieee80211_tx(local, skbs: &tx.skbs, sta: tx.sta, txpending);
1969
1970 return result;
1971}
1972
1973/* device xmit handlers */
1974
1975enum ieee80211_encrypt {
1976 ENCRYPT_NO,
1977 ENCRYPT_MGMT,
1978 ENCRYPT_DATA,
1979};
1980
1981static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
1982 struct sk_buff *skb,
1983 int head_need,
1984 enum ieee80211_encrypt encrypt)
1985{
1986 struct ieee80211_local *local = sdata->local;
1987 bool enc_tailroom;
1988 int tail_need = 0;
1989
1990 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1991 (encrypt == ENCRYPT_DATA &&
1992 sdata->crypto_tx_tailroom_needed_cnt);
1993
1994 if (enc_tailroom) {
1995 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1996 tail_need -= skb_tailroom(skb);
1997 tail_need = max_t(int, tail_need, 0);
1998 }
1999
2000 if (skb_cloned(skb) &&
2001 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
2002 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
2003 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
2004 else if (head_need || tail_need)
2005 I802_DEBUG_INC(local->tx_expand_skb_head);
2006 else
2007 return 0;
2008
2009 if (pskb_expand_head(skb, nhead: head_need, ntail: tail_need, GFP_ATOMIC)) {
2010 wiphy_debug(local->hw.wiphy,
2011 "failed to reallocate TX buffer\n");
2012 return -ENOMEM;
2013 }
2014
2015 return 0;
2016}
2017
2018void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
2019 struct sta_info *sta, struct sk_buff *skb)
2020{
2021 struct ieee80211_local *local = sdata->local;
2022 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2023 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
2024 int headroom;
2025 enum ieee80211_encrypt encrypt;
2026
2027 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
2028 encrypt = ENCRYPT_NO;
2029 else if (ieee80211_is_mgmt(fc: hdr->frame_control))
2030 encrypt = ENCRYPT_MGMT;
2031 else
2032 encrypt = ENCRYPT_DATA;
2033
2034 headroom = local->tx_headroom;
2035 if (encrypt != ENCRYPT_NO)
2036 headroom += IEEE80211_ENCRYPT_HEADROOM;
2037 headroom -= skb_headroom(skb);
2038 headroom = max_t(int, 0, headroom);
2039
2040 if (ieee80211_skb_resize(sdata, skb, head_need: headroom, encrypt)) {
2041 ieee80211_free_txskb(hw: &local->hw, skb);
2042 return;
2043 }
2044
2045 /* reload after potential resize */
2046 hdr = (struct ieee80211_hdr *) skb->data;
2047 info->control.vif = &sdata->vif;
2048
2049 if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
2050 if (ieee80211_is_data(fc: hdr->frame_control) &&
2051 is_unicast_ether_addr(addr: hdr->addr1)) {
2052 if (mesh_nexthop_resolve(sdata, skb))
2053 return; /* skb queued: don't free */
2054 } else {
2055 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2056 }
2057 }
2058
2059 ieee80211_set_qos_hdr(sdata, skb);
2060 ieee80211_tx(sdata, sta, skb, txpending: false);
2061}
2062
2063static bool ieee80211_validate_radiotap_len(struct sk_buff *skb)
2064{
2065 struct ieee80211_radiotap_header *rthdr =
2066 (struct ieee80211_radiotap_header *)skb->data;
2067
2068 /* check for not even having the fixed radiotap header part */
2069 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2070 return false; /* too short to be possibly valid */
2071
2072 /* is it a header version we can trust to find length from? */
2073 if (unlikely(rthdr->it_version))
2074 return false; /* only version 0 is supported */
2075
2076 /* does the skb contain enough to deliver on the alleged length? */
2077 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2078 return false; /* skb too short for claimed rt header extent */
2079
2080 return true;
2081}
2082
2083bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2084 struct net_device *dev)
2085{
2086 struct ieee80211_local *local = wdev_priv(wdev: dev->ieee80211_ptr);
2087 struct ieee80211_radiotap_iterator iterator;
2088 struct ieee80211_radiotap_header *rthdr =
2089 (struct ieee80211_radiotap_header *) skb->data;
2090 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2091 int ret = ieee80211_radiotap_iterator_init(iterator: &iterator, radiotap_header: rthdr, max_length: skb->len,
2092 NULL);
2093 u16 txflags;
2094 u16 rate = 0;
2095 bool rate_found = false;
2096 u8 rate_retries = 0;
2097 u16 rate_flags = 0;
2098 u8 mcs_known, mcs_flags, mcs_bw;
2099 u16 vht_known;
2100 u8 vht_mcs = 0, vht_nss = 0;
2101 int i;
2102
2103 if (!ieee80211_validate_radiotap_len(skb))
2104 return false;
2105
2106 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2107 IEEE80211_TX_CTL_DONTFRAG;
2108
2109 /*
2110 * for every radiotap entry that is present
2111 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2112 * entries present, or -EINVAL on error)
2113 */
2114
2115 while (!ret) {
2116 ret = ieee80211_radiotap_iterator_next(iterator: &iterator);
2117
2118 if (ret)
2119 continue;
2120
2121 /* see if this argument is something we can use */
2122 switch (iterator.this_arg_index) {
2123 /*
2124 * You must take care when dereferencing iterator.this_arg
2125 * for multibyte types... the pointer is not aligned. Use
2126 * get_unaligned((type *)iterator.this_arg) to dereference
2127 * iterator.this_arg for type "type" safely on all arches.
2128 */
2129 case IEEE80211_RADIOTAP_FLAGS:
2130 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2131 /*
2132 * this indicates that the skb we have been
2133 * handed has the 32-bit FCS CRC at the end...
2134 * we should react to that by snipping it off
2135 * because it will be recomputed and added
2136 * on transmission
2137 */
2138 if (skb->len < (iterator._max_length + FCS_LEN))
2139 return false;
2140
2141 skb_trim(skb, len: skb->len - FCS_LEN);
2142 }
2143 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2144 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2145 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2146 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2147 break;
2148
2149 case IEEE80211_RADIOTAP_TX_FLAGS:
2150 txflags = get_unaligned_le16(p: iterator.this_arg);
2151 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2152 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2153 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2154 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
2155 if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2156 info->control.flags |=
2157 IEEE80211_TX_CTRL_DONT_REORDER;
2158 break;
2159
2160 case IEEE80211_RADIOTAP_RATE:
2161 rate = *iterator.this_arg;
2162 rate_flags = 0;
2163 rate_found = true;
2164 break;
2165
2166 case IEEE80211_RADIOTAP_ANTENNA:
2167 /* this can appear multiple times, keep a bitmap */
2168 info->control.antennas |= BIT(*iterator.this_arg);
2169 break;
2170
2171 case IEEE80211_RADIOTAP_DATA_RETRIES:
2172 rate_retries = *iterator.this_arg;
2173 break;
2174
2175 case IEEE80211_RADIOTAP_MCS:
2176 mcs_known = iterator.this_arg[0];
2177 mcs_flags = iterator.this_arg[1];
2178 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2179 break;
2180
2181 rate_found = true;
2182 rate = iterator.this_arg[2];
2183 rate_flags = IEEE80211_TX_RC_MCS;
2184
2185 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2186 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2187 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2188
2189 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
2190 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
2191 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
2192 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2193
2194 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2195 mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2196 info->flags |= IEEE80211_TX_CTL_LDPC;
2197
2198 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2199 u8 stbc = u8_get_bits(v: mcs_flags,
2200 field: IEEE80211_RADIOTAP_MCS_STBC_MASK);
2201
2202 info->flags |=
2203 u32_encode_bits(v: stbc,
2204 field: IEEE80211_TX_CTL_STBC);
2205 }
2206 break;
2207
2208 case IEEE80211_RADIOTAP_VHT:
2209 vht_known = get_unaligned_le16(p: iterator.this_arg);
2210 rate_found = true;
2211
2212 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2213 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2214 (iterator.this_arg[2] &
2215 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2216 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2217 if (vht_known &
2218 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2219 if (iterator.this_arg[3] == 1)
2220 rate_flags |=
2221 IEEE80211_TX_RC_40_MHZ_WIDTH;
2222 else if (iterator.this_arg[3] == 4)
2223 rate_flags |=
2224 IEEE80211_TX_RC_80_MHZ_WIDTH;
2225 else if (iterator.this_arg[3] == 11)
2226 rate_flags |=
2227 IEEE80211_TX_RC_160_MHZ_WIDTH;
2228 }
2229
2230 vht_mcs = iterator.this_arg[4] >> 4;
2231 if (vht_mcs > 11)
2232 vht_mcs = 0;
2233 vht_nss = iterator.this_arg[4] & 0xF;
2234 if (!vht_nss || vht_nss > 8)
2235 vht_nss = 1;
2236 break;
2237
2238 /*
2239 * Please update the file
2240 * Documentation/networking/mac80211-injection.rst
2241 * when parsing new fields here.
2242 */
2243
2244 default:
2245 break;
2246 }
2247 }
2248
2249 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2250 return false;
2251
2252 if (rate_found) {
2253 struct ieee80211_supported_band *sband =
2254 local->hw.wiphy->bands[info->band];
2255
2256 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2257
2258 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2259 info->control.rates[i].idx = -1;
2260 info->control.rates[i].flags = 0;
2261 info->control.rates[i].count = 0;
2262 }
2263
2264 if (rate_flags & IEEE80211_TX_RC_MCS) {
2265 /* reset antennas if not enough */
2266 if (IEEE80211_HT_MCS_CHAINS(rate) >
2267 hweight8(info->control.antennas))
2268 info->control.antennas = 0;
2269
2270 info->control.rates[0].idx = rate;
2271 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2272 /* reset antennas if not enough */
2273 if (vht_nss > hweight8(info->control.antennas))
2274 info->control.antennas = 0;
2275
2276 ieee80211_rate_set_vht(rate: info->control.rates, mcs: vht_mcs,
2277 nss: vht_nss);
2278 } else if (sband) {
2279 for (i = 0; i < sband->n_bitrates; i++) {
2280 if (rate * 5 != sband->bitrates[i].bitrate)
2281 continue;
2282
2283 info->control.rates[0].idx = i;
2284 break;
2285 }
2286 }
2287
2288 if (info->control.rates[0].idx < 0)
2289 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2290
2291 info->control.rates[0].flags = rate_flags;
2292 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2293 local->hw.max_rate_tries);
2294 }
2295
2296 return true;
2297}
2298
2299netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2300 struct net_device *dev)
2301{
2302 struct ieee80211_local *local = wdev_priv(wdev: dev->ieee80211_ptr);
2303 struct ieee80211_chanctx_conf *chanctx_conf;
2304 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2305 struct ieee80211_hdr *hdr;
2306 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
2307 struct cfg80211_chan_def *chandef;
2308 u16 len_rthdr;
2309 int hdrlen;
2310
2311 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2312 if (unlikely(!ieee80211_sdata_running(sdata)))
2313 goto fail;
2314
2315 memset(info, 0, sizeof(*info));
2316 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2317 IEEE80211_TX_CTL_INJECTED;
2318
2319 /* Sanity-check the length of the radiotap header */
2320 if (!ieee80211_validate_radiotap_len(skb))
2321 goto fail;
2322
2323 /* we now know there is a radiotap header with a length we can use */
2324 len_rthdr = ieee80211_get_radiotap_len(data: skb->data);
2325
2326 /*
2327 * fix up the pointers accounting for the radiotap
2328 * header still being in there. We are being given
2329 * a precooked IEEE80211 header so no need for
2330 * normal processing
2331 */
2332 skb_set_mac_header(skb, offset: len_rthdr);
2333 /*
2334 * these are just fixed to the end of the rt area since we
2335 * don't have any better information and at this point, nobody cares
2336 */
2337 skb_set_network_header(skb, offset: len_rthdr);
2338 skb_set_transport_header(skb, offset: len_rthdr);
2339
2340 if (skb->len < len_rthdr + 2)
2341 goto fail;
2342
2343 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2344 hdrlen = ieee80211_hdrlen(fc: hdr->frame_control);
2345
2346 if (skb->len < len_rthdr + hdrlen)
2347 goto fail;
2348
2349 /*
2350 * Initialize skb->protocol if the injected frame is a data frame
2351 * carrying a rfc1042 header
2352 */
2353 if (ieee80211_is_data(fc: hdr->frame_control) &&
2354 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2355 u8 *payload = (u8 *)hdr + hdrlen;
2356
2357 if (ether_addr_equal(addr1: payload, addr2: rfc1042_header))
2358 skb->protocol = cpu_to_be16((payload[6] << 8) |
2359 payload[7]);
2360 }
2361
2362 rcu_read_lock();
2363
2364 /*
2365 * We process outgoing injected frames that have a local address
2366 * we handle as though they are non-injected frames.
2367 * This code here isn't entirely correct, the local MAC address
2368 * isn't always enough to find the interface to use; for proper
2369 * VLAN support we have an nl80211-based mechanism.
2370 *
2371 * This is necessary, for example, for old hostapd versions that
2372 * don't use nl80211-based management TX/RX.
2373 */
2374 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2375 if (!ieee80211_sdata_running(sdata: tmp_sdata))
2376 continue;
2377 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2378 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2379 continue;
2380 if (ether_addr_equal(addr1: tmp_sdata->vif.addr, addr2: hdr->addr2)) {
2381 sdata = tmp_sdata;
2382 break;
2383 }
2384 }
2385
2386 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
2387 if (!chanctx_conf) {
2388 tmp_sdata = rcu_dereference(local->monitor_sdata);
2389 if (tmp_sdata)
2390 chanctx_conf =
2391 rcu_dereference(tmp_sdata->vif.bss_conf.chanctx_conf);
2392 }
2393
2394 if (chanctx_conf)
2395 chandef = &chanctx_conf->def;
2396 else if (!local->use_chanctx)
2397 chandef = &local->_oper_chandef;
2398 else
2399 goto fail_rcu;
2400
2401 /*
2402 * Frame injection is not allowed if beaconing is not allowed
2403 * or if we need radar detection. Beaconing is usually not allowed when
2404 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2405 * Passive scan is also used in world regulatory domains where
2406 * your country is not known and as such it should be treated as
2407 * NO TX unless the channel is explicitly allowed in which case
2408 * your current regulatory domain would not have the passive scan
2409 * flag.
2410 *
2411 * Since AP mode uses monitor interfaces to inject/TX management
2412 * frames we can make AP mode the exception to this rule once it
2413 * supports radar detection as its implementation can deal with
2414 * radar detection by itself. We can do that later by adding a
2415 * monitor flag interfaces used for AP support.
2416 */
2417 if (!cfg80211_reg_can_beacon(wiphy: local->hw.wiphy, chandef,
2418 iftype: sdata->vif.type))
2419 goto fail_rcu;
2420
2421 info->band = chandef->chan->band;
2422
2423 /* Initialize skb->priority according to frame type and TID class,
2424 * with respect to the sub interface that the frame will actually
2425 * be transmitted on. If the DONT_REORDER flag is set, the original
2426 * skb-priority is preserved to assure frames injected with this
2427 * flag are not reordered relative to each other.
2428 */
2429 ieee80211_select_queue_80211(sdata, skb, hdr);
2430 skb_set_queue_mapping(skb, queue_mapping: ieee80211_ac_from_tid(tid: skb->priority));
2431
2432 /*
2433 * Process the radiotap header. This will now take into account the
2434 * selected chandef above to accurately set injection rates and
2435 * retransmissions.
2436 */
2437 if (!ieee80211_parse_tx_radiotap(skb, dev))
2438 goto fail_rcu;
2439
2440 /* remove the injection radiotap header */
2441 skb_pull(skb, len: len_rthdr);
2442
2443 ieee80211_xmit(sdata, NULL, skb);
2444 rcu_read_unlock();
2445
2446 return NETDEV_TX_OK;
2447
2448fail_rcu:
2449 rcu_read_unlock();
2450fail:
2451 dev_kfree_skb(skb);
2452 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
2453}
2454
2455static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
2456{
2457 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
2458
2459 return ethertype == ETH_P_TDLS &&
2460 skb->len > 14 &&
2461 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2462}
2463
2464int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2465 struct sk_buff *skb,
2466 struct sta_info **sta_out)
2467{
2468 struct sta_info *sta;
2469
2470 switch (sdata->vif.type) {
2471 case NL80211_IFTYPE_AP_VLAN:
2472 sta = rcu_dereference(sdata->u.vlan.sta);
2473 if (sta) {
2474 *sta_out = sta;
2475 return 0;
2476 } else if (sdata->wdev.use_4addr) {
2477 return -ENOLINK;
2478 }
2479 fallthrough;
2480 case NL80211_IFTYPE_AP:
2481 case NL80211_IFTYPE_OCB:
2482 case NL80211_IFTYPE_ADHOC:
2483 if (is_multicast_ether_addr(addr: skb->data)) {
2484 *sta_out = ERR_PTR(error: -ENOENT);
2485 return 0;
2486 }
2487 sta = sta_info_get_bss(sdata, addr: skb->data);
2488 break;
2489#ifdef CONFIG_MAC80211_MESH
2490 case NL80211_IFTYPE_MESH_POINT:
2491 /* determined much later */
2492 *sta_out = NULL;
2493 return 0;
2494#endif
2495 case NL80211_IFTYPE_STATION:
2496 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2497 sta = sta_info_get(sdata, addr: skb->data);
2498 if (sta && test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER)) {
2499 if (test_sta_flag(sta,
2500 flag: WLAN_STA_TDLS_PEER_AUTH)) {
2501 *sta_out = sta;
2502 return 0;
2503 }
2504
2505 /*
2506 * TDLS link during setup - throw out frames to
2507 * peer. Allow TDLS-setup frames to unauthorized
2508 * peers for the special case of a link teardown
2509 * after a TDLS sta is removed due to being
2510 * unreachable.
2511 */
2512 if (!ieee80211_is_tdls_setup(skb))
2513 return -EINVAL;
2514 }
2515
2516 }
2517
2518 sta = sta_info_get(sdata, addr: sdata->vif.cfg.ap_addr);
2519 if (!sta)
2520 return -ENOLINK;
2521 break;
2522 default:
2523 return -EINVAL;
2524 }
2525
2526 *sta_out = sta ?: ERR_PTR(error: -ENOENT);
2527 return 0;
2528}
2529
2530static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
2531 struct sk_buff *skb,
2532 u32 *info_flags,
2533 u64 *cookie)
2534{
2535 struct sk_buff *ack_skb;
2536 u16 info_id = 0;
2537
2538 if (skb->sk)
2539 ack_skb = skb_clone_sk(skb);
2540 else
2541 ack_skb = skb_clone(skb, GFP_ATOMIC);
2542
2543 if (ack_skb) {
2544 unsigned long flags;
2545 int id;
2546
2547 spin_lock_irqsave(&local->ack_status_lock, flags);
2548 id = idr_alloc(&local->ack_status_frames, ptr: ack_skb,
2549 start: 1, end: 0x2000, GFP_ATOMIC);
2550 spin_unlock_irqrestore(lock: &local->ack_status_lock, flags);
2551
2552 if (id >= 0) {
2553 info_id = id;
2554 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2555 if (cookie) {
2556 *cookie = ieee80211_mgmt_tx_cookie(local);
2557 IEEE80211_SKB_CB(skb: ack_skb)->ack.cookie = *cookie;
2558 }
2559 } else {
2560 kfree_skb(skb: ack_skb);
2561 }
2562 }
2563
2564 return info_id;
2565}
2566
2567/**
2568 * ieee80211_build_hdr - build 802.11 header in the given frame
2569 * @sdata: virtual interface to build the header for
2570 * @skb: the skb to build the header in
2571 * @info_flags: skb flags to set
2572 * @sta: the station pointer
2573 * @ctrl_flags: info control flags to set
2574 * @cookie: cookie pointer to fill (if not %NULL)
2575 *
2576 * This function takes the skb with 802.3 header and reformats the header to
2577 * the appropriate IEEE 802.11 header based on which interface the packet is
2578 * being transmitted on.
2579 *
2580 * Note that this function also takes care of the TX status request and
2581 * potential unsharing of the SKB - this needs to be interleaved with the
2582 * header building.
2583 *
2584 * The function requires the read-side RCU lock held
2585 *
2586 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
2587 */
2588static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
2589 struct sk_buff *skb, u32 info_flags,
2590 struct sta_info *sta, u32 ctrl_flags,
2591 u64 *cookie)
2592{
2593 struct ieee80211_local *local = sdata->local;
2594 struct ieee80211_tx_info *info;
2595 int head_need;
2596 u16 ethertype, hdrlen, meshhdrlen = 0;
2597 __le16 fc;
2598 struct ieee80211_hdr hdr;
2599 struct ieee80211s_hdr mesh_hdr __maybe_unused;
2600 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
2601 const u8 *encaps_data;
2602 int encaps_len, skip_header_bytes;
2603 bool wme_sta = false, authorized = false;
2604 bool tdls_peer;
2605 bool multicast;
2606 u16 info_id = 0;
2607 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
2608 enum nl80211_band band;
2609 int ret;
2610 u8 link_id = u32_get_bits(v: ctrl_flags, field: IEEE80211_TX_CTRL_MLO_LINK);
2611
2612 if (IS_ERR(ptr: sta))
2613 sta = NULL;
2614
2615#ifdef CONFIG_MAC80211_DEBUGFS
2616 if (local->force_tx_status)
2617 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2618#endif
2619
2620 /* convert Ethernet header to proper 802.11 header (based on
2621 * operation mode) */
2622 ethertype = (skb->data[12] << 8) | skb->data[13];
2623 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2624
2625 if (!ieee80211_vif_is_mld(vif: &sdata->vif))
2626 chanctx_conf =
2627 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
2628
2629 switch (sdata->vif.type) {
2630 case NL80211_IFTYPE_AP_VLAN:
2631 if (sdata->wdev.use_4addr) {
2632 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2633 /* RA TA DA SA */
2634 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
2635 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2636 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2637 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2638 hdrlen = 30;
2639 authorized = test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED);
2640 wme_sta = sta->sta.wme;
2641 }
2642 if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
2643 struct ieee80211_sub_if_data *ap_sdata;
2644
2645 /* override chanctx_conf from AP (we don't have one) */
2646 ap_sdata = container_of(sdata->bss,
2647 struct ieee80211_sub_if_data,
2648 u.ap);
2649 chanctx_conf =
2650 rcu_dereference(ap_sdata->vif.bss_conf.chanctx_conf);
2651 }
2652 if (sdata->wdev.use_4addr)
2653 break;
2654 fallthrough;
2655 case NL80211_IFTYPE_AP:
2656 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2657 /* DA BSSID SA */
2658 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2659
2660 if (ieee80211_vif_is_mld(vif: &sdata->vif) && sta && !sta->sta.mlo) {
2661 struct ieee80211_link_data *link;
2662
2663 link_id = sta->deflink.link_id;
2664 link = rcu_dereference(sdata->link[link_id]);
2665 if (WARN_ON(!link)) {
2666 ret = -ENOLINK;
2667 goto free;
2668 }
2669 memcpy(hdr.addr2, link->conf->addr, ETH_ALEN);
2670 } else if (link_id == IEEE80211_LINK_UNSPECIFIED ||
2671 (sta && sta->sta.mlo)) {
2672 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2673 } else {
2674 struct ieee80211_bss_conf *conf;
2675
2676 conf = rcu_dereference(sdata->vif.link_conf[link_id]);
2677 if (unlikely(!conf)) {
2678 ret = -ENOLINK;
2679 goto free;
2680 }
2681
2682 memcpy(hdr.addr2, conf->addr, ETH_ALEN);
2683 }
2684
2685 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2686 hdrlen = 24;
2687 break;
2688#ifdef CONFIG_MAC80211_MESH
2689 case NL80211_IFTYPE_MESH_POINT:
2690 if (!is_multicast_ether_addr(addr: skb->data)) {
2691 struct sta_info *next_hop;
2692 bool mpp_lookup = true;
2693
2694 mpath = mesh_path_lookup(sdata, dst: skb->data);
2695 if (mpath) {
2696 mpp_lookup = false;
2697 next_hop = rcu_dereference(mpath->next_hop);
2698 if (!next_hop ||
2699 !(mpath->flags & (MESH_PATH_ACTIVE |
2700 MESH_PATH_RESOLVING)))
2701 mpp_lookup = true;
2702 }
2703
2704 if (mpp_lookup) {
2705 mppath = mpp_path_lookup(sdata, dst: skb->data);
2706 if (mppath)
2707 mppath->exp_time = jiffies;
2708 }
2709
2710 if (mppath && mpath)
2711 mesh_path_del(sdata, addr: mpath->dst);
2712 }
2713
2714 /*
2715 * Use address extension if it is a packet from
2716 * another interface or if we know the destination
2717 * is being proxied by a portal (i.e. portal address
2718 * differs from proxied address)
2719 */
2720 if (ether_addr_equal(addr1: sdata->vif.addr, addr2: skb->data + ETH_ALEN) &&
2721 !(mppath && !ether_addr_equal(addr1: mppath->mpp, addr2: skb->data))) {
2722 hdrlen = ieee80211_fill_mesh_addresses(hdr: &hdr, fc: &fc,
2723 da: skb->data, sa: skb->data + ETH_ALEN);
2724 meshhdrlen = ieee80211_new_mesh_header(sdata, meshhdr: &mesh_hdr,
2725 NULL, NULL);
2726 } else {
2727 /* DS -> MBSS (802.11-2012 13.11.3.3).
2728 * For unicast with unknown forwarding information,
2729 * destination might be in the MBSS or if that fails
2730 * forwarded to another mesh gate. In either case
2731 * resolution will be handled in ieee80211_xmit(), so
2732 * leave the original DA. This also works for mcast */
2733 const u8 *mesh_da = skb->data;
2734
2735 if (mppath)
2736 mesh_da = mppath->mpp;
2737 else if (mpath)
2738 mesh_da = mpath->dst;
2739
2740 hdrlen = ieee80211_fill_mesh_addresses(hdr: &hdr, fc: &fc,
2741 da: mesh_da, sa: sdata->vif.addr);
2742 if (is_multicast_ether_addr(addr: mesh_da))
2743 /* DA TA mSA AE:SA */
2744 meshhdrlen = ieee80211_new_mesh_header(
2745 sdata, meshhdr: &mesh_hdr,
2746 addr4or5: skb->data + ETH_ALEN, NULL);
2747 else
2748 /* RA TA mDA mSA AE:DA SA */
2749 meshhdrlen = ieee80211_new_mesh_header(
2750 sdata, meshhdr: &mesh_hdr, addr4or5: skb->data,
2751 addr6: skb->data + ETH_ALEN);
2752
2753 }
2754
2755 /* For injected frames, fill RA right away as nexthop lookup
2756 * will be skipped.
2757 */
2758 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2759 is_zero_ether_addr(addr: hdr.addr1))
2760 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2761 break;
2762#endif
2763 case NL80211_IFTYPE_STATION:
2764 /* we already did checks when looking up the RA STA */
2765 tdls_peer = test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER);
2766
2767 if (tdls_peer) {
2768 /* For TDLS only one link can be valid with peer STA */
2769 int tdls_link_id = sta->sta.valid_links ?
2770 __ffs(sta->sta.valid_links) : 0;
2771 struct ieee80211_link_data *link;
2772
2773 /* DA SA BSSID */
2774 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2775 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2776 link = rcu_dereference(sdata->link[tdls_link_id]);
2777 if (WARN_ON_ONCE(!link)) {
2778 ret = -EINVAL;
2779 goto free;
2780 }
2781 memcpy(hdr.addr3, link->u.mgd.bssid, ETH_ALEN);
2782 hdrlen = 24;
2783 } else if (sdata->u.mgd.use_4addr &&
2784 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2785 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2786 IEEE80211_FCTL_TODS);
2787 /* RA TA DA SA */
2788 memcpy(hdr.addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
2789 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
2790 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2791 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2792 hdrlen = 30;
2793 } else {
2794 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2795 /* BSSID SA DA */
2796 memcpy(hdr.addr1, sdata->vif.cfg.ap_addr, ETH_ALEN);
2797 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2798 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2799 hdrlen = 24;
2800 }
2801 break;
2802 case NL80211_IFTYPE_OCB:
2803 /* DA SA BSSID */
2804 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2805 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2806 eth_broadcast_addr(addr: hdr.addr3);
2807 hdrlen = 24;
2808 break;
2809 case NL80211_IFTYPE_ADHOC:
2810 /* DA SA BSSID */
2811 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2812 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2813 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
2814 hdrlen = 24;
2815 break;
2816 default:
2817 ret = -EINVAL;
2818 goto free;
2819 }
2820
2821 if (!chanctx_conf) {
2822 if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
2823 ret = -ENOTCONN;
2824 goto free;
2825 }
2826 /* MLD transmissions must not rely on the band */
2827 band = 0;
2828 } else {
2829 band = chanctx_conf->def.chan->band;
2830 }
2831
2832 multicast = is_multicast_ether_addr(addr: hdr.addr1);
2833
2834 /* sta is always NULL for mesh */
2835 if (sta) {
2836 authorized = test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED);
2837 wme_sta = sta->sta.wme;
2838 } else if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
2839 /* For mesh, the use of the QoS header is mandatory */
2840 wme_sta = true;
2841 }
2842
2843 /* receiver does QoS (which also means we do) use it */
2844 if (wme_sta) {
2845 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2846 hdrlen += 2;
2847 }
2848
2849 /*
2850 * Drop unicast frames to unauthorised stations unless they are
2851 * EAPOL frames from the local station.
2852 */
2853 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
2854 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
2855 !multicast && !authorized &&
2856 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
2857 !ieee80211_is_our_addr(sdata, skb->data + ETH_ALEN, NULL)))) {
2858#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2859 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
2860 sdata->name, hdr.addr1);
2861#endif
2862
2863 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2864
2865 ret = -EPERM;
2866 goto free;
2867 }
2868
2869 if (unlikely(!multicast &&
2870 ((skb->sk &&
2871 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS) ||
2872 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
2873 info_id = ieee80211_store_ack_skb(local, skb, info_flags: &info_flags,
2874 cookie);
2875
2876 /*
2877 * If the skb is shared we need to obtain our own copy.
2878 */
2879 skb = skb_share_check(skb, GFP_ATOMIC);
2880 if (unlikely(!skb)) {
2881 ret = -ENOMEM;
2882 goto free;
2883 }
2884
2885 hdr.frame_control = fc;
2886 hdr.duration_id = 0;
2887 hdr.seq_ctrl = 0;
2888
2889 skip_header_bytes = ETH_HLEN;
2890 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2891 encaps_data = bridge_tunnel_header;
2892 encaps_len = sizeof(bridge_tunnel_header);
2893 skip_header_bytes -= 2;
2894 } else if (ethertype >= ETH_P_802_3_MIN) {
2895 encaps_data = rfc1042_header;
2896 encaps_len = sizeof(rfc1042_header);
2897 skip_header_bytes -= 2;
2898 } else {
2899 encaps_data = NULL;
2900 encaps_len = 0;
2901 }
2902
2903 skb_pull(skb, len: skip_header_bytes);
2904 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
2905
2906 /*
2907 * So we need to modify the skb header and hence need a copy of
2908 * that. The head_need variable above doesn't, so far, include
2909 * the needed header space that we don't need right away. If we
2910 * can, then we don't reallocate right now but only after the
2911 * frame arrives at the master device (if it does...)
2912 *
2913 * If we cannot, however, then we will reallocate to include all
2914 * the ever needed space. Also, if we need to reallocate it anyway,
2915 * make it big enough for everything we may ever need.
2916 */
2917
2918 if (head_need > 0 || skb_cloned(skb)) {
2919 head_need += IEEE80211_ENCRYPT_HEADROOM;
2920 head_need += local->tx_headroom;
2921 head_need = max_t(int, 0, head_need);
2922 if (ieee80211_skb_resize(sdata, skb, head_need, encrypt: ENCRYPT_DATA)) {
2923 ieee80211_free_txskb(hw: &local->hw, skb);
2924 skb = NULL;
2925 return ERR_PTR(error: -ENOMEM);
2926 }
2927 }
2928
2929 if (encaps_data)
2930 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
2931
2932#ifdef CONFIG_MAC80211_MESH
2933 if (meshhdrlen > 0)
2934 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
2935#endif
2936
2937 if (ieee80211_is_data_qos(fc)) {
2938 __le16 *qos_control;
2939
2940 qos_control = skb_push(skb, len: 2);
2941 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2942 /*
2943 * Maybe we could actually set some fields here, for now just
2944 * initialise to zero to indicate no special operation.
2945 */
2946 *qos_control = 0;
2947 } else
2948 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2949
2950 skb_reset_mac_header(skb);
2951
2952 info = IEEE80211_SKB_CB(skb);
2953 memset(info, 0, sizeof(*info));
2954
2955 info->flags = info_flags;
2956 if (info_id) {
2957 info->status_data = info_id;
2958 info->status_data_idr = 1;
2959 }
2960 info->band = band;
2961
2962 if (likely(!cookie)) {
2963 ctrl_flags |= u32_encode_bits(v: link_id,
2964 field: IEEE80211_TX_CTRL_MLO_LINK);
2965 } else {
2966 unsigned int pre_conf_link_id;
2967
2968 /*
2969 * ctrl_flags already have been set by
2970 * ieee80211_tx_control_port(), here
2971 * we just sanity check that
2972 */
2973
2974 pre_conf_link_id = u32_get_bits(v: ctrl_flags,
2975 field: IEEE80211_TX_CTRL_MLO_LINK);
2976
2977 if (pre_conf_link_id != link_id &&
2978 link_id != IEEE80211_LINK_UNSPECIFIED) {
2979#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
2980 net_info_ratelimited("%s: dropped frame to %pM with bad link ID request (%d vs. %d)\n",
2981 sdata->name, hdr.addr1,
2982 pre_conf_link_id, link_id);
2983#endif
2984 ret = -EINVAL;
2985 goto free;
2986 }
2987 }
2988
2989 info->control.flags = ctrl_flags;
2990
2991 return skb;
2992 free:
2993 kfree_skb(skb);
2994 return ERR_PTR(error: ret);
2995}
2996
2997/*
2998 * fast-xmit overview
2999 *
3000 * The core idea of this fast-xmit is to remove per-packet checks by checking
3001 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
3002 * checks that are needed to get the sta->fast_tx pointer assigned, after which
3003 * much less work can be done per packet. For example, fragmentation must be
3004 * disabled or the fast_tx pointer will not be set. All the conditions are seen
3005 * in the code here.
3006 *
3007 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
3008 * header and other data to aid packet processing in ieee80211_xmit_fast().
3009 *
3010 * The most difficult part of this is that when any of these assumptions
3011 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
3012 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
3013 * since the per-packet code no longer checks the conditions. This is reflected
3014 * by the calls to these functions throughout the rest of the code, and must be
3015 * maintained if any of the TX path checks change.
3016 */
3017
3018void ieee80211_check_fast_xmit(struct sta_info *sta)
3019{
3020 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
3021 struct ieee80211_local *local = sta->local;
3022 struct ieee80211_sub_if_data *sdata = sta->sdata;
3023 struct ieee80211_hdr *hdr = (void *)build.hdr;
3024 struct ieee80211_chanctx_conf *chanctx_conf;
3025 __le16 fc;
3026
3027 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
3028 return;
3029
3030 if (ieee80211_vif_is_mesh(vif: &sdata->vif))
3031 mesh_fast_tx_flush_sta(sdata, sta);
3032
3033 /* Locking here protects both the pointer itself, and against concurrent
3034 * invocations winning data access races to, e.g., the key pointer that
3035 * is used.
3036 * Without it, the invocation of this function right after the key
3037 * pointer changes wouldn't be sufficient, as another CPU could access
3038 * the pointer, then stall, and then do the cache update after the CPU
3039 * that invalidated the key.
3040 * With the locking, such scenarios cannot happen as the check for the
3041 * key and the fast-tx assignment are done atomically, so the CPU that
3042 * modifies the key will either wait or other one will see the key
3043 * cleared/changed already.
3044 */
3045 spin_lock_bh(lock: &sta->lock);
3046 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
3047 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
3048 sdata->vif.type == NL80211_IFTYPE_STATION)
3049 goto out;
3050
3051 if (!test_sta_flag(sta, flag: WLAN_STA_AUTHORIZED))
3052 goto out;
3053
3054 if (test_sta_flag(sta, flag: WLAN_STA_PS_STA) ||
3055 test_sta_flag(sta, flag: WLAN_STA_PS_DRIVER) ||
3056 test_sta_flag(sta, flag: WLAN_STA_PS_DELIVER) ||
3057 test_sta_flag(sta, flag: WLAN_STA_CLEAR_PS_FILT))
3058 goto out;
3059
3060 if (sdata->noack_map)
3061 goto out;
3062
3063 /* fast-xmit doesn't handle fragmentation at all */
3064 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
3065 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
3066 goto out;
3067
3068 if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
3069 rcu_read_lock();
3070 chanctx_conf =
3071 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
3072 if (!chanctx_conf) {
3073 rcu_read_unlock();
3074 goto out;
3075 }
3076 build.band = chanctx_conf->def.chan->band;
3077 rcu_read_unlock();
3078 } else {
3079 /* MLD transmissions must not rely on the band */
3080 build.band = 0;
3081 }
3082
3083 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
3084
3085 switch (sdata->vif.type) {
3086 case NL80211_IFTYPE_ADHOC:
3087 /* DA SA BSSID */
3088 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3089 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3090 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
3091 build.hdr_len = 24;
3092 break;
3093 case NL80211_IFTYPE_STATION:
3094 if (test_sta_flag(sta, flag: WLAN_STA_TDLS_PEER)) {
3095 /* For TDLS only one link can be valid with peer STA */
3096 int tdls_link_id = sta->sta.valid_links ?
3097 __ffs(sta->sta.valid_links) : 0;
3098 struct ieee80211_link_data *link;
3099
3100 /* DA SA BSSID */
3101 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3102 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3103 link = rcu_dereference(sdata->link[tdls_link_id]);
3104 if (WARN_ON_ONCE(!link))
3105 break;
3106 memcpy(hdr->addr3, link->u.mgd.bssid, ETH_ALEN);
3107 build.hdr_len = 24;
3108 break;
3109 }
3110
3111 if (sdata->u.mgd.use_4addr) {
3112 /* non-regular ethertype cannot use the fastpath */
3113 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3114 IEEE80211_FCTL_TODS);
3115 /* RA TA DA SA */
3116 memcpy(hdr->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
3117 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3118 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3119 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3120 build.hdr_len = 30;
3121 break;
3122 }
3123 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
3124 /* BSSID SA DA */
3125 memcpy(hdr->addr1, sdata->vif.cfg.ap_addr, ETH_ALEN);
3126 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3127 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3128 build.hdr_len = 24;
3129 break;
3130 case NL80211_IFTYPE_AP_VLAN:
3131 if (sdata->wdev.use_4addr) {
3132 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3133 IEEE80211_FCTL_TODS);
3134 /* RA TA DA SA */
3135 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
3136 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3137 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3138 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3139 build.hdr_len = 30;
3140 break;
3141 }
3142 fallthrough;
3143 case NL80211_IFTYPE_AP:
3144 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3145 /* DA BSSID SA */
3146 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3147 if (sta->sta.mlo || !ieee80211_vif_is_mld(vif: &sdata->vif)) {
3148 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3149 } else {
3150 unsigned int link_id = sta->deflink.link_id;
3151 struct ieee80211_link_data *link;
3152
3153 rcu_read_lock();
3154 link = rcu_dereference(sdata->link[link_id]);
3155 if (WARN_ON(!link)) {
3156 rcu_read_unlock();
3157 goto out;
3158 }
3159 memcpy(hdr->addr2, link->conf->addr, ETH_ALEN);
3160 rcu_read_unlock();
3161 }
3162 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3163 build.hdr_len = 24;
3164 break;
3165 default:
3166 /* not handled on fast-xmit */
3167 goto out;
3168 }
3169
3170 if (sta->sta.wme) {
3171 build.hdr_len += 2;
3172 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3173 }
3174
3175 /* We store the key here so there's no point in using rcu_dereference()
3176 * but that's fine because the code that changes the pointers will call
3177 * this function after doing so. For a single CPU that would be enough,
3178 * for multiple see the comment above.
3179 */
3180 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3181 if (!build.key)
3182 build.key = rcu_access_pointer(sdata->default_unicast_key);
3183 if (build.key) {
3184 bool gen_iv, iv_spc, mmic;
3185
3186 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3187 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
3188 mmic = build.key->conf.flags &
3189 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3190 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
3191
3192 /* don't handle software crypto */
3193 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3194 goto out;
3195
3196 /* Key is being removed */
3197 if (build.key->flags & KEY_FLAG_TAINTED)
3198 goto out;
3199
3200 switch (build.key->conf.cipher) {
3201 case WLAN_CIPHER_SUITE_CCMP:
3202 case WLAN_CIPHER_SUITE_CCMP_256:
3203 if (gen_iv)
3204 build.pn_offs = build.hdr_len;
3205 if (gen_iv || iv_spc)
3206 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3207 break;
3208 case WLAN_CIPHER_SUITE_GCMP:
3209 case WLAN_CIPHER_SUITE_GCMP_256:
3210 if (gen_iv)
3211 build.pn_offs = build.hdr_len;
3212 if (gen_iv || iv_spc)
3213 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3214 break;
3215 case WLAN_CIPHER_SUITE_TKIP:
3216 /* cannot handle MMIC or IV generation in xmit-fast */
3217 if (mmic || gen_iv)
3218 goto out;
3219 if (iv_spc)
3220 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3221 break;
3222 case WLAN_CIPHER_SUITE_WEP40:
3223 case WLAN_CIPHER_SUITE_WEP104:
3224 /* cannot handle IV generation in fast-xmit */
3225 if (gen_iv)
3226 goto out;
3227 if (iv_spc)
3228 build.hdr_len += IEEE80211_WEP_IV_LEN;
3229 break;
3230 case WLAN_CIPHER_SUITE_AES_CMAC:
3231 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3232 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3233 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3234 WARN(1,
3235 "management cipher suite 0x%x enabled for data\n",
3236 build.key->conf.cipher);
3237 goto out;
3238 default:
3239 /* we don't know how to generate IVs for this at all */
3240 if (WARN_ON(gen_iv))
3241 goto out;
3242 }
3243
3244 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3245 }
3246
3247 hdr->frame_control = fc;
3248
3249 memcpy(build.hdr + build.hdr_len,
3250 rfc1042_header, sizeof(rfc1042_header));
3251 build.hdr_len += sizeof(rfc1042_header);
3252
3253 fast_tx = kmemdup(p: &build, size: sizeof(build), GFP_ATOMIC);
3254 /* if the kmemdup fails, continue w/o fast_tx */
3255
3256 out:
3257 /* we might have raced against another call to this function */
3258 old = rcu_dereference_protected(sta->fast_tx,
3259 lockdep_is_held(&sta->lock));
3260 rcu_assign_pointer(sta->fast_tx, fast_tx);
3261 if (old)
3262 kfree_rcu(old, rcu_head);
3263 spin_unlock_bh(lock: &sta->lock);
3264}
3265
3266void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3267{
3268 struct sta_info *sta;
3269
3270 rcu_read_lock();
3271 list_for_each_entry_rcu(sta, &local->sta_list, list)
3272 ieee80211_check_fast_xmit(sta);
3273 rcu_read_unlock();
3274}
3275
3276void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3277{
3278 struct ieee80211_local *local = sdata->local;
3279 struct sta_info *sta;
3280
3281 rcu_read_lock();
3282
3283 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3284 if (sdata != sta->sdata &&
3285 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3286 continue;
3287 ieee80211_check_fast_xmit(sta);
3288 }
3289
3290 rcu_read_unlock();
3291}
3292
3293void ieee80211_clear_fast_xmit(struct sta_info *sta)
3294{
3295 struct ieee80211_fast_tx *fast_tx;
3296
3297 spin_lock_bh(lock: &sta->lock);
3298 fast_tx = rcu_dereference_protected(sta->fast_tx,
3299 lockdep_is_held(&sta->lock));
3300 RCU_INIT_POINTER(sta->fast_tx, NULL);
3301 spin_unlock_bh(lock: &sta->lock);
3302
3303 if (fast_tx)
3304 kfree_rcu(fast_tx, rcu_head);
3305}
3306
3307static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3308 struct sk_buff *skb, int headroom)
3309{
3310 if (skb_headroom(skb) < headroom) {
3311 I802_DEBUG_INC(local->tx_expand_skb_head);
3312
3313 if (pskb_expand_head(skb, nhead: headroom, ntail: 0, GFP_ATOMIC)) {
3314 wiphy_debug(local->hw.wiphy,
3315 "failed to reallocate TX buffer\n");
3316 return false;
3317 }
3318 }
3319
3320 return true;
3321}
3322
3323static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3324 struct ieee80211_fast_tx *fast_tx,
3325 struct sk_buff *skb)
3326{
3327 struct ieee80211_local *local = sdata->local;
3328 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3329 struct ieee80211_hdr *hdr;
3330 struct ethhdr *amsdu_hdr;
3331 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3332 int subframe_len = skb->len - hdr_len;
3333 void *data;
3334 u8 *qc, *h_80211_src, *h_80211_dst;
3335 const u8 *bssid;
3336
3337 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3338 return false;
3339
3340 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3341 return true;
3342
3343 if (!ieee80211_amsdu_realloc_pad(local, skb,
3344 headroom: sizeof(*amsdu_hdr) +
3345 local->hw.extra_tx_headroom))
3346 return false;
3347
3348 data = skb_push(skb, len: sizeof(*amsdu_hdr));
3349 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3350 hdr = data;
3351 amsdu_hdr = data + hdr_len;
3352 /* h_80211_src/dst is addr* field within hdr */
3353 h_80211_src = data + fast_tx->sa_offs;
3354 h_80211_dst = data + fast_tx->da_offs;
3355
3356 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3357 ether_addr_copy(dst: amsdu_hdr->h_source, src: h_80211_src);
3358 ether_addr_copy(dst: amsdu_hdr->h_dest, src: h_80211_dst);
3359
3360 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3361 * fields needs to be changed to BSSID for A-MSDU frames depending
3362 * on FromDS/ToDS values.
3363 */
3364 switch (sdata->vif.type) {
3365 case NL80211_IFTYPE_STATION:
3366 bssid = sdata->vif.cfg.ap_addr;
3367 break;
3368 case NL80211_IFTYPE_AP:
3369 case NL80211_IFTYPE_AP_VLAN:
3370 bssid = sdata->vif.addr;
3371 break;
3372 default:
3373 bssid = NULL;
3374 }
3375
3376 if (bssid && ieee80211_has_fromds(fc: hdr->frame_control))
3377 ether_addr_copy(dst: h_80211_src, src: bssid);
3378
3379 if (bssid && ieee80211_has_tods(fc: hdr->frame_control))
3380 ether_addr_copy(dst: h_80211_dst, src: bssid);
3381
3382 qc = ieee80211_get_qos_ctl(hdr);
3383 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3384
3385 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3386
3387 return true;
3388}
3389
3390static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3391 struct sta_info *sta,
3392 struct ieee80211_fast_tx *fast_tx,
3393 struct sk_buff *skb,
3394 const u8 *da, const u8 *sa)
3395{
3396 struct ieee80211_local *local = sdata->local;
3397 struct fq *fq = &local->fq;
3398 struct fq_tin *tin;
3399 struct fq_flow *flow;
3400 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3401 struct ieee80211_txq *txq = sta->sta.txq[tid];
3402 struct txq_info *txqi;
3403 struct sk_buff **frag_tail, *head;
3404 int subframe_len = skb->len - ETH_ALEN;
3405 u8 max_subframes = sta->sta.max_amsdu_subframes;
3406 int max_frags = local->hw.max_tx_fragments;
3407 int max_amsdu_len = sta->sta.cur->max_amsdu_len;
3408 int orig_truesize;
3409 u32 flow_idx;
3410 __be16 len;
3411 void *data;
3412 bool ret = false;
3413 unsigned int orig_len;
3414 int n = 2, nfrags, pad = 0;
3415 u16 hdrlen;
3416
3417 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3418 return false;
3419
3420 if (sdata->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED)
3421 return false;
3422
3423 if (ieee80211_vif_is_mesh(vif: &sdata->vif))
3424 return false;
3425
3426 if (skb_is_gso(skb))
3427 return false;
3428
3429 if (!txq)
3430 return false;
3431
3432 txqi = to_txq_info(txq);
3433 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3434 return false;
3435
3436 if (sta->sta.cur->max_rc_amsdu_len)
3437 max_amsdu_len = min_t(int, max_amsdu_len,
3438 sta->sta.cur->max_rc_amsdu_len);
3439
3440 if (sta->sta.cur->max_tid_amsdu_len[tid])
3441 max_amsdu_len = min_t(int, max_amsdu_len,
3442 sta->sta.cur->max_tid_amsdu_len[tid]);
3443
3444 flow_idx = fq_flow_idx(fq, skb);
3445
3446 spin_lock_bh(lock: &fq->lock);
3447
3448 /* TODO: Ideally aggregation should be done on dequeue to remain
3449 * responsive to environment changes.
3450 */
3451
3452 tin = &txqi->tin;
3453 flow = fq_flow_classify(fq, tin, idx: flow_idx, skb);
3454 head = skb_peek_tail(list_: &flow->queue);
3455 if (!head || skb_is_gso(skb: head))
3456 goto out;
3457
3458 orig_truesize = head->truesize;
3459 orig_len = head->len;
3460
3461 if (skb->len + head->len > max_amsdu_len)
3462 goto out;
3463
3464 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3465 nfrags += 1 + skb_shinfo(head)->nr_frags;
3466 frag_tail = &skb_shinfo(head)->frag_list;
3467 while (*frag_tail) {
3468 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3469 frag_tail = &(*frag_tail)->next;
3470 n++;
3471 }
3472
3473 if (max_subframes && n > max_subframes)
3474 goto out;
3475
3476 if (max_frags && nfrags > max_frags)
3477 goto out;
3478
3479 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3480 goto out;
3481
3482 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, skb: head))
3483 goto out;
3484
3485 /* If n == 2, the "while (*frag_tail)" loop above didn't execute
3486 * and frag_tail should be &skb_shinfo(head)->frag_list.
3487 * However, ieee80211_amsdu_prepare_head() can reallocate it.
3488 * Reload frag_tail to have it pointing to the correct place.
3489 */
3490 if (n == 2)
3491 frag_tail = &skb_shinfo(head)->frag_list;
3492
3493 /*
3494 * Pad out the previous subframe to a multiple of 4 by adding the
3495 * padding to the next one, that's being added. Note that head->len
3496 * is the length of the full A-MSDU, but that works since each time
3497 * we add a new subframe we pad out the previous one to a multiple
3498 * of 4 and thus it no longer matters in the next round.
3499 */
3500 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3501 if ((head->len - hdrlen) & 3)
3502 pad = 4 - ((head->len - hdrlen) & 3);
3503
3504 if (!ieee80211_amsdu_realloc_pad(local, skb, headroom: sizeof(rfc1042_header) +
3505 2 + pad))
3506 goto out_recalc;
3507
3508 ret = true;
3509 data = skb_push(skb, ETH_ALEN + 2);
3510 ether_addr_copy(dst: data, src: da);
3511 ether_addr_copy(dst: data + ETH_ALEN, src: sa);
3512
3513 data += 2 * ETH_ALEN;
3514 len = cpu_to_be16(subframe_len);
3515 memcpy(data, &len, 2);
3516 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3517
3518 memset(skb_push(skb, pad), 0, pad);
3519
3520 head->len += skb->len;
3521 head->data_len += skb->len;
3522 *frag_tail = skb;
3523
3524out_recalc:
3525 fq->memory_usage += head->truesize - orig_truesize;
3526 if (head->len != orig_len) {
3527 flow->backlog += head->len - orig_len;
3528 tin->backlog_bytes += head->len - orig_len;
3529 }
3530out:
3531 spin_unlock_bh(lock: &fq->lock);
3532
3533 return ret;
3534}
3535
3536/*
3537 * Can be called while the sta lock is held. Anything that can cause packets to
3538 * be generated will cause deadlock!
3539 */
3540static ieee80211_tx_result
3541ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3542 struct sta_info *sta, u8 pn_offs,
3543 struct ieee80211_key *key,
3544 struct ieee80211_tx_data *tx)
3545{
3546 struct sk_buff *skb = tx->skb;
3547 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3548 struct ieee80211_hdr *hdr = (void *)skb->data;
3549 u8 tid = IEEE80211_NUM_TIDS;
3550
3551 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) &&
3552 ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE)
3553 return TX_DROP;
3554
3555 if (key)
3556 info->control.hw_key = &key->conf;
3557
3558 dev_sw_netstats_tx_add(dev: skb->dev, packets: 1, len: skb->len);
3559
3560 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3561 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3562 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3563 } else {
3564 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3565 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3566 sdata->sequence_number += 0x10;
3567 }
3568
3569 if (skb_shinfo(skb)->gso_size)
3570 sta->deflink.tx_stats.msdu[tid] +=
3571 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3572 else
3573 sta->deflink.tx_stats.msdu[tid]++;
3574
3575 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3576
3577 /* statistics normally done by ieee80211_tx_h_stats (but that
3578 * has to consider fragmentation, so is more complex)
3579 */
3580 sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3581 sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++;
3582
3583 if (pn_offs) {
3584 u64 pn;
3585 u8 *crypto_hdr = skb->data + pn_offs;
3586
3587 switch (key->conf.cipher) {
3588 case WLAN_CIPHER_SUITE_CCMP:
3589 case WLAN_CIPHER_SUITE_CCMP_256:
3590 case WLAN_CIPHER_SUITE_GCMP:
3591 case WLAN_CIPHER_SUITE_GCMP_256:
3592 pn = atomic64_inc_return(v: &key->conf.tx_pn);
3593 crypto_hdr[0] = pn;
3594 crypto_hdr[1] = pn >> 8;
3595 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
3596 crypto_hdr[4] = pn >> 16;
3597 crypto_hdr[5] = pn >> 24;
3598 crypto_hdr[6] = pn >> 32;
3599 crypto_hdr[7] = pn >> 40;
3600 break;
3601 }
3602 }
3603
3604 return TX_CONTINUE;
3605}
3606
3607static netdev_features_t
3608ieee80211_sdata_netdev_features(struct ieee80211_sub_if_data *sdata)
3609{
3610 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
3611 return sdata->vif.netdev_features;
3612
3613 if (!sdata->bss)
3614 return 0;
3615
3616 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
3617 return sdata->vif.netdev_features;
3618}
3619
3620static struct sk_buff *
3621ieee80211_tx_skb_fixup(struct sk_buff *skb, netdev_features_t features)
3622{
3623 if (skb_is_gso(skb)) {
3624 struct sk_buff *segs;
3625
3626 segs = skb_gso_segment(skb, features);
3627 if (!segs)
3628 return skb;
3629 if (IS_ERR(ptr: segs))
3630 goto free;
3631
3632 consume_skb(skb);
3633 return segs;
3634 }
3635
3636 if (skb_needs_linearize(skb, features) && __skb_linearize(skb))
3637 goto free;
3638
3639 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3640 int ofs = skb_checksum_start_offset(skb);
3641
3642 if (skb->encapsulation)
3643 skb_set_inner_transport_header(skb, offset: ofs);
3644 else
3645 skb_set_transport_header(skb, offset: ofs);
3646
3647 if (skb_csum_hwoffload_help(skb, features))
3648 goto free;
3649 }
3650
3651 skb_mark_not_on_list(skb);
3652 return skb;
3653
3654free:
3655 kfree_skb(skb);
3656 return NULL;
3657}
3658
3659void __ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3660 struct sta_info *sta,
3661 struct ieee80211_fast_tx *fast_tx,
3662 struct sk_buff *skb, bool ampdu,
3663 const u8 *da, const u8 *sa)
3664{
3665 struct ieee80211_local *local = sdata->local;
3666 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3667 struct ieee80211_tx_info *info;
3668 struct ieee80211_tx_data tx;
3669 ieee80211_tx_result r;
3670 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3671 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3672
3673 skb = skb_share_check(skb, GFP_ATOMIC);
3674 if (unlikely(!skb))
3675 return;
3676
3677 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3678 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb, da, sa))
3679 return;
3680
3681 /* will not be crypto-handled beyond what we do here, so use false
3682 * as the may-encrypt argument for the resize to not account for
3683 * more room than we already have in 'extra_head'
3684 */
3685 if (unlikely(ieee80211_skb_resize(sdata, skb,
3686 max_t(int, extra_head + hw_headroom -
3687 skb_headroom(skb), 0),
3688 ENCRYPT_NO)))
3689 goto free;
3690
3691 hdr = skb_push(skb, len: extra_head);
3692 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3693 memcpy(skb->data + fast_tx->da_offs, da, ETH_ALEN);
3694 memcpy(skb->data + fast_tx->sa_offs, sa, ETH_ALEN);
3695
3696 info = IEEE80211_SKB_CB(skb);
3697 memset(info, 0, sizeof(*info));
3698 info->band = fast_tx->band;
3699 info->control.vif = &sdata->vif;
3700 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3701 IEEE80211_TX_CTL_DONTFRAG;
3702 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT |
3703 u32_encode_bits(IEEE80211_LINK_UNSPECIFIED,
3704 field: IEEE80211_TX_CTRL_MLO_LINK);
3705
3706#ifdef CONFIG_MAC80211_DEBUGFS
3707 if (local->force_tx_status)
3708 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3709#endif
3710
3711 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3712 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3713
3714 *ieee80211_get_qos_ctl(hdr) = tid;
3715 }
3716
3717 __skb_queue_head_init(list: &tx.skbs);
3718
3719 tx.flags = IEEE80211_TX_UNICAST;
3720 tx.local = local;
3721 tx.sdata = sdata;
3722 tx.sta = sta;
3723 tx.key = fast_tx->key;
3724
3725 if (ieee80211_queue_skb(local, sdata, sta, skb))
3726 return;
3727
3728 tx.skb = skb;
3729 r = ieee80211_xmit_fast_finish(sdata, sta, pn_offs: fast_tx->pn_offs,
3730 key: fast_tx->key, tx: &tx);
3731 tx.skb = NULL;
3732 if (r == TX_DROP)
3733 goto free;
3734
3735 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3736 sdata = container_of(sdata->bss,
3737 struct ieee80211_sub_if_data, u.ap);
3738
3739 __skb_queue_tail(list: &tx.skbs, newsk: skb);
3740 ieee80211_tx_frags(local, vif: &sdata->vif, sta, skbs: &tx.skbs, txpending: false);
3741 return;
3742
3743free:
3744 kfree_skb(skb);
3745}
3746
3747static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3748 struct sta_info *sta,
3749 struct ieee80211_fast_tx *fast_tx,
3750 struct sk_buff *skb)
3751{
3752 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3753 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3754 struct tid_ampdu_tx *tid_tx = NULL;
3755 struct sk_buff *next;
3756 struct ethhdr eth;
3757 u8 tid = IEEE80211_NUM_TIDS;
3758
3759 /* control port protocol needs a lot of special handling */
3760 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3761 return false;
3762
3763 /* only RFC 1042 SNAP */
3764 if (ethertype < ETH_P_802_3_MIN)
3765 return false;
3766
3767 /* don't handle TX status request here either */
3768 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3769 return false;
3770
3771 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3772 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3773 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3774 if (tid_tx) {
3775 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3776 return false;
3777 if (tid_tx->timeout)
3778 tid_tx->last_tx = jiffies;
3779 }
3780 }
3781
3782 memcpy(&eth, skb->data, ETH_HLEN - 2);
3783
3784 /* after this point (skb is modified) we cannot return false */
3785 skb = ieee80211_tx_skb_fixup(skb, features: ieee80211_sdata_netdev_features(sdata));
3786 if (!skb)
3787 return true;
3788
3789 skb_list_walk_safe(skb, skb, next) {
3790 skb_mark_not_on_list(skb);
3791 __ieee80211_xmit_fast(sdata, sta, fast_tx, skb, ampdu: tid_tx,
3792 da: eth.h_dest, sa: eth.h_source);
3793 }
3794
3795 return true;
3796}
3797
3798struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3799 struct ieee80211_txq *txq)
3800{
3801 struct ieee80211_local *local = hw_to_local(hw);
3802 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3803 struct ieee80211_hdr *hdr;
3804 struct sk_buff *skb = NULL;
3805 struct fq *fq = &local->fq;
3806 struct fq_tin *tin = &txqi->tin;
3807 struct ieee80211_tx_info *info;
3808 struct ieee80211_tx_data tx;
3809 ieee80211_tx_result r;
3810 struct ieee80211_vif *vif = txq->vif;
3811 int q = vif->hw_queue[txq->ac];
3812 unsigned long flags;
3813 bool q_stopped;
3814
3815 WARN_ON_ONCE(softirq_count() == 0);
3816
3817 if (!ieee80211_txq_airtime_check(hw, txq))
3818 return NULL;
3819
3820begin:
3821 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3822 q_stopped = local->queue_stop_reasons[q];
3823 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
3824
3825 if (unlikely(q_stopped)) {
3826 /* mark for waking later */
3827 set_bit(nr: IEEE80211_TXQ_DIRTY, addr: &txqi->flags);
3828 return NULL;
3829 }
3830
3831 spin_lock_bh(lock: &fq->lock);
3832
3833 /* Make sure fragments stay together. */
3834 skb = __skb_dequeue(list: &txqi->frags);
3835 if (unlikely(skb)) {
3836 if (!(IEEE80211_SKB_CB(skb)->control.flags &
3837 IEEE80211_TX_INTCFL_NEED_TXPROCESSING))
3838 goto out;
3839 IEEE80211_SKB_CB(skb)->control.flags &=
3840 ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
3841 } else {
3842 if (unlikely(test_bit(IEEE80211_TXQ_STOP, &txqi->flags)))
3843 goto out;
3844
3845 skb = fq_tin_dequeue(fq, tin, dequeue_func: fq_tin_dequeue_func);
3846 }
3847
3848 if (!skb)
3849 goto out;
3850
3851 spin_unlock_bh(lock: &fq->lock);
3852
3853 hdr = (struct ieee80211_hdr *)skb->data;
3854 info = IEEE80211_SKB_CB(skb);
3855
3856 memset(&tx, 0, sizeof(tx));
3857 __skb_queue_head_init(list: &tx.skbs);
3858 tx.local = local;
3859 tx.skb = skb;
3860 tx.sdata = vif_to_sdata(p: info->control.vif);
3861
3862 if (txq->sta) {
3863 tx.sta = container_of(txq->sta, struct sta_info, sta);
3864 /*
3865 * Drop unicast frames to unauthorised stations unless they are
3866 * injected frames or EAPOL frames from the local station.
3867 */
3868 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3869 ieee80211_is_data(hdr->frame_control) &&
3870 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
3871 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3872 !is_multicast_ether_addr(hdr->addr1) &&
3873 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3874 (!(info->control.flags &
3875 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3876 !ieee80211_is_our_addr(tx.sdata, hdr->addr2,
3877 NULL)))) {
3878 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3879 ieee80211_free_txskb(hw: &local->hw, skb);
3880 goto begin;
3881 }
3882 }
3883
3884 /*
3885 * The key can be removed while the packet was queued, so need to call
3886 * this here to get the current key.
3887 */
3888 r = ieee80211_tx_h_select_key(tx: &tx);
3889 if (r != TX_CONTINUE) {
3890 ieee80211_free_txskb(hw: &local->hw, skb);
3891 goto begin;
3892 }
3893
3894 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3895 info->flags |= (IEEE80211_TX_CTL_AMPDU |
3896 IEEE80211_TX_CTL_DONTFRAG);
3897
3898 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
3899 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3900 r = ieee80211_tx_h_rate_ctrl(tx: &tx);
3901 if (r != TX_CONTINUE) {
3902 ieee80211_free_txskb(hw: &local->hw, skb);
3903 goto begin;
3904 }
3905 }
3906 goto encap_out;
3907 }
3908
3909 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
3910 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3911 sta);
3912 u8 pn_offs = 0;
3913
3914 if (tx.key &&
3915 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3916 pn_offs = ieee80211_hdrlen(fc: hdr->frame_control);
3917
3918 r = ieee80211_xmit_fast_finish(sdata: sta->sdata, sta, pn_offs,
3919 key: tx.key, tx: &tx);
3920 if (r != TX_CONTINUE) {
3921 ieee80211_free_txskb(hw: &local->hw, skb);
3922 goto begin;
3923 }
3924 } else {
3925 if (invoke_tx_handlers_late(tx: &tx))
3926 goto begin;
3927
3928 skb = __skb_dequeue(list: &tx.skbs);
3929
3930 if (!skb_queue_empty(list: &tx.skbs)) {
3931 spin_lock_bh(lock: &fq->lock);
3932 skb_queue_splice_tail(list: &tx.skbs, head: &txqi->frags);
3933 spin_unlock_bh(lock: &fq->lock);
3934 }
3935 }
3936
3937 if (skb_has_frag_list(skb) &&
3938 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3939 if (skb_linearize(skb)) {
3940 ieee80211_free_txskb(hw: &local->hw, skb);
3941 goto begin;
3942 }
3943 }
3944
3945 switch (tx.sdata->vif.type) {
3946 case NL80211_IFTYPE_MONITOR:
3947 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3948 vif = &tx.sdata->vif;
3949 break;
3950 }
3951 tx.sdata = rcu_dereference(local->monitor_sdata);
3952 if (tx.sdata) {
3953 vif = &tx.sdata->vif;
3954 info->hw_queue =
3955 vif->hw_queue[skb_get_queue_mapping(skb)];
3956 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3957 ieee80211_free_txskb(hw: &local->hw, skb);
3958 goto begin;
3959 } else {
3960 vif = NULL;
3961 }
3962 break;
3963 case NL80211_IFTYPE_AP_VLAN:
3964 tx.sdata = container_of(tx.sdata->bss,
3965 struct ieee80211_sub_if_data, u.ap);
3966 fallthrough;
3967 default:
3968 vif = &tx.sdata->vif;
3969 break;
3970 }
3971
3972encap_out:
3973 IEEE80211_SKB_CB(skb)->control.vif = vif;
3974
3975 if (tx.sta &&
3976 wiphy_ext_feature_isset(wiphy: local->hw.wiphy, ftidx: NL80211_EXT_FEATURE_AQL)) {
3977 bool ampdu = txq->ac != IEEE80211_AC_VO;
3978 u32 airtime;
3979
3980 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, pubsta: txq->sta,
3981 len: skb->len, ampdu);
3982 if (airtime) {
3983 airtime = ieee80211_info_set_tx_time_est(info, tx_time_est: airtime);
3984 ieee80211_sta_update_pending_airtime(local, sta: tx.sta,
3985 ac: txq->ac,
3986 tx_airtime: airtime,
3987 tx_completed: false);
3988 }
3989 }
3990
3991 return skb;
3992
3993out:
3994 spin_unlock_bh(lock: &fq->lock);
3995
3996 return skb;
3997}
3998EXPORT_SYMBOL(ieee80211_tx_dequeue);
3999
4000static inline s32 ieee80211_sta_deficit(struct sta_info *sta, u8 ac)
4001{
4002 struct airtime_info *air_info = &sta->airtime[ac];
4003
4004 return air_info->deficit - atomic_read(v: &air_info->aql_tx_pending);
4005}
4006
4007static void
4008ieee80211_txq_set_active(struct txq_info *txqi)
4009{
4010 struct sta_info *sta;
4011
4012 if (!txqi->txq.sta)
4013 return;
4014
4015 sta = container_of(txqi->txq.sta, struct sta_info, sta);
4016 sta->airtime[txqi->txq.ac].last_active = (u32)jiffies;
4017}
4018
4019static bool
4020ieee80211_txq_keep_active(struct txq_info *txqi)
4021{
4022 struct sta_info *sta;
4023 u32 diff;
4024
4025 if (!txqi->txq.sta)
4026 return false;
4027
4028 sta = container_of(txqi->txq.sta, struct sta_info, sta);
4029 if (ieee80211_sta_deficit(sta, ac: txqi->txq.ac) >= 0)
4030 return false;
4031
4032 diff = (u32)jiffies - sta->airtime[txqi->txq.ac].last_active;
4033
4034 return diff <= AIRTIME_ACTIVE_DURATION;
4035}
4036
4037struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
4038{
4039 struct ieee80211_local *local = hw_to_local(hw);
4040 struct ieee80211_txq *ret = NULL;
4041 struct txq_info *txqi = NULL, *head = NULL;
4042 bool found_eligible_txq = false;
4043
4044 spin_lock_bh(lock: &local->active_txq_lock[ac]);
4045
4046 if (!local->schedule_round[ac])
4047 goto out;
4048
4049 begin:
4050 txqi = list_first_entry_or_null(&local->active_txqs[ac],
4051 struct txq_info,
4052 schedule_order);
4053 if (!txqi)
4054 goto out;
4055
4056 if (txqi == head) {
4057 if (!found_eligible_txq)
4058 goto out;
4059 else
4060 found_eligible_txq = false;
4061 }
4062
4063 if (!head)
4064 head = txqi;
4065
4066 if (txqi->txq.sta) {
4067 struct sta_info *sta = container_of(txqi->txq.sta,
4068 struct sta_info, sta);
4069 bool aql_check = ieee80211_txq_airtime_check(hw, txq: &txqi->txq);
4070 s32 deficit = ieee80211_sta_deficit(sta, ac: txqi->txq.ac);
4071
4072 if (aql_check)
4073 found_eligible_txq = true;
4074
4075 if (deficit < 0)
4076 sta->airtime[txqi->txq.ac].deficit +=
4077 sta->airtime_weight;
4078
4079 if (deficit < 0 || !aql_check) {
4080 list_move_tail(list: &txqi->schedule_order,
4081 head: &local->active_txqs[txqi->txq.ac]);
4082 goto begin;
4083 }
4084 }
4085
4086 if (txqi->schedule_round == local->schedule_round[ac])
4087 goto out;
4088
4089 list_del_init(entry: &txqi->schedule_order);
4090 txqi->schedule_round = local->schedule_round[ac];
4091 ret = &txqi->txq;
4092
4093out:
4094 spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4095 return ret;
4096}
4097EXPORT_SYMBOL(ieee80211_next_txq);
4098
4099void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
4100 struct ieee80211_txq *txq,
4101 bool force)
4102{
4103 struct ieee80211_local *local = hw_to_local(hw);
4104 struct txq_info *txqi = to_txq_info(txq);
4105 bool has_queue;
4106
4107 spin_lock_bh(lock: &local->active_txq_lock[txq->ac]);
4108
4109 has_queue = force || txq_has_queue(txq);
4110 if (list_empty(head: &txqi->schedule_order) &&
4111 (has_queue || ieee80211_txq_keep_active(txqi))) {
4112 /* If airtime accounting is active, always enqueue STAs at the
4113 * head of the list to ensure that they only get moved to the
4114 * back by the airtime DRR scheduler once they have a negative
4115 * deficit. A station that already has a negative deficit will
4116 * get immediately moved to the back of the list on the next
4117 * call to ieee80211_next_txq().
4118 */
4119 if (txqi->txq.sta && local->airtime_flags && has_queue &&
4120 wiphy_ext_feature_isset(wiphy: local->hw.wiphy,
4121 ftidx: NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
4122 list_add(new: &txqi->schedule_order,
4123 head: &local->active_txqs[txq->ac]);
4124 else
4125 list_add_tail(new: &txqi->schedule_order,
4126 head: &local->active_txqs[txq->ac]);
4127 if (has_queue)
4128 ieee80211_txq_set_active(txqi);
4129 }
4130
4131 spin_unlock_bh(lock: &local->active_txq_lock[txq->ac]);
4132}
4133EXPORT_SYMBOL(__ieee80211_schedule_txq);
4134
4135DEFINE_STATIC_KEY_FALSE(aql_disable);
4136
4137bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
4138 struct ieee80211_txq *txq)
4139{
4140 struct sta_info *sta;
4141 struct ieee80211_local *local = hw_to_local(hw);
4142
4143 if (!wiphy_ext_feature_isset(wiphy: local->hw.wiphy, ftidx: NL80211_EXT_FEATURE_AQL))
4144 return true;
4145
4146 if (static_branch_unlikely(&aql_disable))
4147 return true;
4148
4149 if (!txq->sta)
4150 return true;
4151
4152 if (unlikely(txq->tid == IEEE80211_NUM_TIDS))
4153 return true;
4154
4155 sta = container_of(txq->sta, struct sta_info, sta);
4156 if (atomic_read(v: &sta->airtime[txq->ac].aql_tx_pending) <
4157 sta->airtime[txq->ac].aql_limit_low)
4158 return true;
4159
4160 if (atomic_read(v: &local->aql_total_pending_airtime) <
4161 local->aql_threshold &&
4162 atomic_read(v: &sta->airtime[txq->ac].aql_tx_pending) <
4163 sta->airtime[txq->ac].aql_limit_high)
4164 return true;
4165
4166 return false;
4167}
4168EXPORT_SYMBOL(ieee80211_txq_airtime_check);
4169
4170static bool
4171ieee80211_txq_schedule_airtime_check(struct ieee80211_local *local, u8 ac)
4172{
4173 unsigned int num_txq = 0;
4174 struct txq_info *txq;
4175 u32 aql_limit;
4176
4177 if (!wiphy_ext_feature_isset(wiphy: local->hw.wiphy, ftidx: NL80211_EXT_FEATURE_AQL))
4178 return true;
4179
4180 list_for_each_entry(txq, &local->active_txqs[ac], schedule_order)
4181 num_txq++;
4182
4183 aql_limit = (num_txq - 1) * local->aql_txq_limit_low[ac] / 2 +
4184 local->aql_txq_limit_high[ac];
4185
4186 return atomic_read(v: &local->aql_ac_pending_airtime[ac]) < aql_limit;
4187}
4188
4189bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
4190 struct ieee80211_txq *txq)
4191{
4192 struct ieee80211_local *local = hw_to_local(hw);
4193 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
4194 struct sta_info *sta;
4195 u8 ac = txq->ac;
4196
4197 spin_lock_bh(lock: &local->active_txq_lock[ac]);
4198
4199 if (!txqi->txq.sta)
4200 goto out;
4201
4202 if (list_empty(head: &txqi->schedule_order))
4203 goto out;
4204
4205 if (!ieee80211_txq_schedule_airtime_check(local, ac))
4206 goto out;
4207
4208 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
4209 schedule_order) {
4210 if (iter == txqi)
4211 break;
4212
4213 if (!iter->txq.sta) {
4214 list_move_tail(list: &iter->schedule_order,
4215 head: &local->active_txqs[ac]);
4216 continue;
4217 }
4218 sta = container_of(iter->txq.sta, struct sta_info, sta);
4219 if (ieee80211_sta_deficit(sta, ac) < 0)
4220 sta->airtime[ac].deficit += sta->airtime_weight;
4221 list_move_tail(list: &iter->schedule_order, head: &local->active_txqs[ac]);
4222 }
4223
4224 sta = container_of(txqi->txq.sta, struct sta_info, sta);
4225 if (sta->airtime[ac].deficit >= 0)
4226 goto out;
4227
4228 sta->airtime[ac].deficit += sta->airtime_weight;
4229 list_move_tail(list: &txqi->schedule_order, head: &local->active_txqs[ac]);
4230 spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4231
4232 return false;
4233out:
4234 if (!list_empty(head: &txqi->schedule_order))
4235 list_del_init(entry: &txqi->schedule_order);
4236 spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4237
4238 return true;
4239}
4240EXPORT_SYMBOL(ieee80211_txq_may_transmit);
4241
4242void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
4243{
4244 struct ieee80211_local *local = hw_to_local(hw);
4245
4246 spin_lock_bh(lock: &local->active_txq_lock[ac]);
4247
4248 if (ieee80211_txq_schedule_airtime_check(local, ac)) {
4249 local->schedule_round[ac]++;
4250 if (!local->schedule_round[ac])
4251 local->schedule_round[ac]++;
4252 } else {
4253 local->schedule_round[ac] = 0;
4254 }
4255
4256 spin_unlock_bh(lock: &local->active_txq_lock[ac]);
4257}
4258EXPORT_SYMBOL(ieee80211_txq_schedule_start);
4259
4260void __ieee80211_subif_start_xmit(struct sk_buff *skb,
4261 struct net_device *dev,
4262 u32 info_flags,
4263 u32 ctrl_flags,
4264 u64 *cookie)
4265{
4266 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4267 struct ieee80211_local *local = sdata->local;
4268 struct sta_info *sta;
4269 struct sk_buff *next;
4270 int len = skb->len;
4271
4272 if (unlikely(!ieee80211_sdata_running(sdata) || skb->len < ETH_HLEN)) {
4273 kfree_skb(skb);
4274 return;
4275 }
4276
4277 sk_pacing_shift_update(sk: skb->sk, val: sdata->local->hw.tx_sk_pacing_shift);
4278
4279 rcu_read_lock();
4280
4281 if (ieee80211_vif_is_mesh(vif: &sdata->vif) &&
4282 ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT) &&
4283 ieee80211_mesh_xmit_fast(sdata, skb, ctrl_flags))
4284 goto out;
4285
4286 if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta))
4287 goto out_free;
4288
4289 if (IS_ERR(ptr: sta))
4290 sta = NULL;
4291
4292 skb_set_queue_mapping(skb, queue_mapping: ieee80211_select_queue(sdata, sta, skb));
4293 ieee80211_aggr_check(sdata, sta, skb);
4294
4295 if (sta) {
4296 struct ieee80211_fast_tx *fast_tx;
4297
4298 fast_tx = rcu_dereference(sta->fast_tx);
4299
4300 if (fast_tx &&
4301 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
4302 goto out;
4303 }
4304
4305 /* the frame could be fragmented, software-encrypted, and other
4306 * things so we cannot really handle checksum or GSO offload.
4307 * fix it up in software before we handle anything else.
4308 */
4309 skb = ieee80211_tx_skb_fixup(skb, features: 0);
4310 if (!skb) {
4311 len = 0;
4312 goto out;
4313 }
4314
4315 skb_list_walk_safe(skb, skb, next) {
4316 skb_mark_not_on_list(skb);
4317
4318 if (skb->protocol == sdata->control_port_protocol)
4319 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
4320
4321 skb = ieee80211_build_hdr(sdata, skb, info_flags,
4322 sta, ctrl_flags, cookie);
4323 if (IS_ERR(ptr: skb)) {
4324 kfree_skb_list(segs: next);
4325 goto out;
4326 }
4327
4328 dev_sw_netstats_tx_add(dev, packets: 1, len: skb->len);
4329
4330 ieee80211_xmit(sdata, sta, skb);
4331 }
4332 goto out;
4333 out_free:
4334 kfree_skb(skb);
4335 len = 0;
4336 out:
4337 if (len)
4338 ieee80211_tpt_led_trig_tx(local, bytes: len);
4339 rcu_read_unlock();
4340}
4341
4342static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4343{
4344 struct ethhdr *eth;
4345 int err;
4346
4347 err = skb_ensure_writable(skb, ETH_HLEN);
4348 if (unlikely(err))
4349 return err;
4350
4351 eth = (void *)skb->data;
4352 ether_addr_copy(dst: eth->h_dest, src: sta->sta.addr);
4353
4354 return 0;
4355}
4356
4357static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4358 struct net_device *dev)
4359{
4360 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4361 const struct ethhdr *eth = (void *)skb->data;
4362 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4363 __be16 ethertype;
4364
4365 switch (sdata->vif.type) {
4366 case NL80211_IFTYPE_AP_VLAN:
4367 if (sdata->u.vlan.sta)
4368 return false;
4369 if (sdata->wdev.use_4addr)
4370 return false;
4371 fallthrough;
4372 case NL80211_IFTYPE_AP:
4373 /* check runtime toggle for this bss */
4374 if (!sdata->bss->multicast_to_unicast)
4375 return false;
4376 break;
4377 default:
4378 return false;
4379 }
4380
4381 /* multicast to unicast conversion only for some payload */
4382 ethertype = eth->h_proto;
4383 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4384 ethertype = ethvlan->h_vlan_encapsulated_proto;
4385 switch (ethertype) {
4386 case htons(ETH_P_ARP):
4387 case htons(ETH_P_IP):
4388 case htons(ETH_P_IPV6):
4389 break;
4390 default:
4391 return false;
4392 }
4393
4394 return true;
4395}
4396
4397static void
4398ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4399 struct sk_buff_head *queue)
4400{
4401 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4402 struct ieee80211_local *local = sdata->local;
4403 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4404 struct sta_info *sta, *first = NULL;
4405 struct sk_buff *cloned_skb;
4406
4407 rcu_read_lock();
4408
4409 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4410 if (sdata != sta->sdata)
4411 /* AP-VLAN mismatch */
4412 continue;
4413 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4414 /* do not send back to source */
4415 continue;
4416 if (!first) {
4417 first = sta;
4418 continue;
4419 }
4420 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4421 if (!cloned_skb)
4422 goto multicast;
4423 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4424 dev_kfree_skb(cloned_skb);
4425 goto multicast;
4426 }
4427 __skb_queue_tail(list: queue, newsk: cloned_skb);
4428 }
4429
4430 if (likely(first)) {
4431 if (unlikely(ieee80211_change_da(skb, first)))
4432 goto multicast;
4433 __skb_queue_tail(list: queue, newsk: skb);
4434 } else {
4435 /* no STA connected, drop */
4436 kfree_skb(skb);
4437 skb = NULL;
4438 }
4439
4440 goto out;
4441multicast:
4442 __skb_queue_purge(list: queue);
4443 __skb_queue_tail(list: queue, newsk: skb);
4444out:
4445 rcu_read_unlock();
4446}
4447
4448static void ieee80211_mlo_multicast_tx_one(struct ieee80211_sub_if_data *sdata,
4449 struct sk_buff *skb, u32 ctrl_flags,
4450 unsigned int link_id)
4451{
4452 struct sk_buff *out;
4453
4454 out = skb_copy(skb, GFP_ATOMIC);
4455 if (!out)
4456 return;
4457
4458 ctrl_flags |= u32_encode_bits(v: link_id, field: IEEE80211_TX_CTRL_MLO_LINK);
4459 __ieee80211_subif_start_xmit(skb: out, dev: sdata->dev, info_flags: 0, ctrl_flags, NULL);
4460}
4461
4462static void ieee80211_mlo_multicast_tx(struct net_device *dev,
4463 struct sk_buff *skb)
4464{
4465 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4466 unsigned long links = sdata->vif.active_links;
4467 unsigned int link;
4468 u32 ctrl_flags = IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX;
4469
4470 if (hweight16(links) == 1) {
4471 ctrl_flags |= u32_encode_bits(__ffs(links),
4472 field: IEEE80211_TX_CTRL_MLO_LINK);
4473
4474 __ieee80211_subif_start_xmit(skb, dev: sdata->dev, info_flags: 0, ctrl_flags,
4475 NULL);
4476 return;
4477 }
4478
4479 for_each_set_bit(link, &links, IEEE80211_MLD_MAX_NUM_LINKS) {
4480 ieee80211_mlo_multicast_tx_one(sdata, skb, ctrl_flags, link_id: link);
4481 ctrl_flags = 0;
4482 }
4483 kfree_skb(skb);
4484}
4485
4486/**
4487 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4488 * @skb: packet to be sent
4489 * @dev: incoming interface
4490 *
4491 * On failure skb will be freed.
4492 *
4493 * Returns: the netdev TX status (but really only %NETDEV_TX_OK)
4494 */
4495netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4496 struct net_device *dev)
4497{
4498 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4499 const struct ethhdr *eth = (void *)skb->data;
4500
4501 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4502 goto normal;
4503
4504 if (unlikely(!ieee80211_sdata_running(sdata))) {
4505 kfree_skb(skb);
4506 return NETDEV_TX_OK;
4507 }
4508
4509 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4510 struct sk_buff_head queue;
4511
4512 __skb_queue_head_init(list: &queue);
4513 ieee80211_convert_to_unicast(skb, dev, queue: &queue);
4514 while ((skb = __skb_dequeue(list: &queue)))
4515 __ieee80211_subif_start_xmit(skb, dev, info_flags: 0,
4516 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4517 NULL);
4518 } else if (ieee80211_vif_is_mld(vif: &sdata->vif) &&
4519 sdata->vif.type == NL80211_IFTYPE_AP &&
4520 !ieee80211_hw_check(&sdata->local->hw, MLO_MCAST_MULTI_LINK_TX)) {
4521 ieee80211_mlo_multicast_tx(dev, skb);
4522 } else {
4523normal:
4524 __ieee80211_subif_start_xmit(skb, dev, info_flags: 0,
4525 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4526 NULL);
4527 }
4528
4529 return NETDEV_TX_OK;
4530}
4531
4532
4533
4534static bool __ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4535 struct sk_buff *skb, struct sta_info *sta,
4536 bool txpending)
4537{
4538 struct ieee80211_local *local = sdata->local;
4539 struct ieee80211_tx_control control = {};
4540 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4541 struct ieee80211_sta *pubsta = NULL;
4542 unsigned long flags;
4543 int q = info->hw_queue;
4544
4545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4546
4547 if (local->queue_stop_reasons[q] ||
4548 (!txpending && !skb_queue_empty(list: &local->pending[q]))) {
4549 if (txpending)
4550 skb_queue_head(list: &local->pending[q], newsk: skb);
4551 else
4552 skb_queue_tail(list: &local->pending[q], newsk: skb);
4553
4554 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
4555
4556 return false;
4557 }
4558
4559 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
4560
4561 if (sta && sta->uploaded)
4562 pubsta = &sta->sta;
4563
4564 control.sta = pubsta;
4565
4566 drv_tx(local, control: &control, skb);
4567
4568 return true;
4569}
4570
4571static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4572 struct sk_buff *skb, struct sta_info *sta,
4573 bool txpending)
4574{
4575 struct ieee80211_local *local = sdata->local;
4576 struct sk_buff *next;
4577 bool ret = true;
4578
4579 if (ieee80211_queue_skb(local, sdata, sta, skb))
4580 return true;
4581
4582 skb_list_walk_safe(skb, skb, next) {
4583 skb_mark_not_on_list(skb);
4584 if (!__ieee80211_tx_8023(sdata, skb, sta, txpending))
4585 ret = false;
4586 }
4587
4588 return ret;
4589}
4590
4591static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4592 struct net_device *dev, struct sta_info *sta,
4593 struct ieee80211_key *key, struct sk_buff *skb)
4594{
4595 struct ieee80211_tx_info *info;
4596 struct ieee80211_local *local = sdata->local;
4597 struct tid_ampdu_tx *tid_tx;
4598 struct sk_buff *seg, *next;
4599 unsigned int skbs = 0, len = 0;
4600 u16 queue;
4601 u8 tid;
4602
4603 queue = ieee80211_select_queue(sdata, sta, skb);
4604 skb_set_queue_mapping(skb, queue_mapping: queue);
4605
4606 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4607 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4608 goto out_free;
4609
4610 skb = skb_share_check(skb, GFP_ATOMIC);
4611 if (unlikely(!skb))
4612 return;
4613
4614 ieee80211_aggr_check(sdata, sta, skb);
4615
4616 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4617 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4618 if (tid_tx) {
4619 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4620 /* fall back to non-offload slow path */
4621 __ieee80211_subif_start_xmit(skb, dev, info_flags: 0,
4622 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4623 NULL);
4624 return;
4625 }
4626
4627 if (tid_tx->timeout)
4628 tid_tx->last_tx = jiffies;
4629 }
4630
4631 skb = ieee80211_tx_skb_fixup(skb, features: ieee80211_sdata_netdev_features(sdata));
4632 if (!skb)
4633 return;
4634
4635 info = IEEE80211_SKB_CB(skb);
4636 memset(info, 0, sizeof(*info));
4637
4638 info->hw_queue = sdata->vif.hw_queue[queue];
4639
4640 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4641 sdata = container_of(sdata->bss,
4642 struct ieee80211_sub_if_data, u.ap);
4643
4644 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
4645 info->control.vif = &sdata->vif;
4646
4647 if (key)
4648 info->control.hw_key = &key->conf;
4649
4650 skb_list_walk_safe(skb, seg, next) {
4651 skbs++;
4652 len += seg->len;
4653 if (seg != skb)
4654 memcpy(IEEE80211_SKB_CB(seg), info, sizeof(*info));
4655 }
4656
4657 if (unlikely(skb->sk &&
4658 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
4659 info->status_data = ieee80211_store_ack_skb(local, skb,
4660 info_flags: &info->flags, NULL);
4661 if (info->status_data)
4662 info->status_data_idr = 1;
4663 }
4664
4665 dev_sw_netstats_tx_add(dev, packets: skbs, len);
4666 sta->deflink.tx_stats.packets[queue] += skbs;
4667 sta->deflink.tx_stats.bytes[queue] += len;
4668
4669 ieee80211_tpt_led_trig_tx(local, bytes: len);
4670
4671 ieee80211_tx_8023(sdata, skb, sta, txpending: false);
4672
4673 return;
4674
4675out_free:
4676 kfree_skb(skb);
4677}
4678
4679netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4680 struct net_device *dev)
4681{
4682 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4683 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
4684 struct ieee80211_key *key;
4685 struct sta_info *sta;
4686
4687 if (unlikely(!ieee80211_sdata_running(sdata) || skb->len < ETH_HLEN)) {
4688 kfree_skb(skb);
4689 return NETDEV_TX_OK;
4690 }
4691
4692 rcu_read_lock();
4693
4694 if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta)) {
4695 kfree_skb(skb);
4696 goto out;
4697 }
4698
4699 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4700 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
4701 sdata->control_port_protocol == ehdr->h_proto))
4702 goto skip_offload;
4703
4704 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4705 if (!key)
4706 key = rcu_dereference(sdata->default_unicast_key);
4707
4708 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4709 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4710 goto skip_offload;
4711
4712 sk_pacing_shift_update(sk: skb->sk, val: sdata->local->hw.tx_sk_pacing_shift);
4713 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4714 goto out;
4715
4716skip_offload:
4717 ieee80211_subif_start_xmit(skb, dev);
4718out:
4719 rcu_read_unlock();
4720
4721 return NETDEV_TX_OK;
4722}
4723
4724struct sk_buff *
4725ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4726 struct sk_buff *skb, u32 info_flags)
4727{
4728 struct ieee80211_hdr *hdr;
4729 struct ieee80211_tx_data tx = {
4730 .local = sdata->local,
4731 .sdata = sdata,
4732 };
4733 struct sta_info *sta;
4734
4735 rcu_read_lock();
4736
4737 if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta)) {
4738 kfree_skb(skb);
4739 skb = ERR_PTR(error: -EINVAL);
4740 goto out;
4741 }
4742
4743 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta,
4744 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
4745 if (IS_ERR(ptr: skb))
4746 goto out;
4747
4748 hdr = (void *)skb->data;
4749 tx.sta = sta_info_get(sdata, addr: hdr->addr1);
4750 tx.skb = skb;
4751
4752 if (ieee80211_tx_h_select_key(tx: &tx) != TX_CONTINUE) {
4753 rcu_read_unlock();
4754 kfree_skb(skb);
4755 return ERR_PTR(error: -EINVAL);
4756 }
4757
4758out:
4759 rcu_read_unlock();
4760 return skb;
4761}
4762
4763/*
4764 * ieee80211_clear_tx_pending may not be called in a context where
4765 * it is possible that it packets could come in again.
4766 */
4767void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4768{
4769 struct sk_buff *skb;
4770 int i;
4771
4772 for (i = 0; i < local->hw.queues; i++) {
4773 while ((skb = skb_dequeue(list: &local->pending[i])) != NULL)
4774 ieee80211_free_txskb(hw: &local->hw, skb);
4775 }
4776}
4777
4778/*
4779 * Returns false if the frame couldn't be transmitted but was queued instead,
4780 * which in this case means re-queued -- take as an indication to stop sending
4781 * more pending frames.
4782 */
4783static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4784 struct sk_buff *skb)
4785{
4786 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4787 struct ieee80211_sub_if_data *sdata;
4788 struct sta_info *sta;
4789 struct ieee80211_hdr *hdr;
4790 bool result;
4791 struct ieee80211_chanctx_conf *chanctx_conf;
4792
4793 sdata = vif_to_sdata(p: info->control.vif);
4794
4795 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
4796 /* update band only for non-MLD */
4797 if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
4798 chanctx_conf =
4799 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
4800 if (unlikely(!chanctx_conf)) {
4801 dev_kfree_skb(skb);
4802 return true;
4803 }
4804 info->band = chanctx_conf->def.chan->band;
4805 }
4806 result = ieee80211_tx(sdata, NULL, skb, txpending: true);
4807 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
4808 if (ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta)) {
4809 dev_kfree_skb(skb);
4810 return true;
4811 }
4812
4813 if (IS_ERR(ptr: sta) || (sta && !sta->uploaded))
4814 sta = NULL;
4815
4816 result = ieee80211_tx_8023(sdata, skb, sta, txpending: true);
4817 } else {
4818 struct sk_buff_head skbs;
4819
4820 __skb_queue_head_init(list: &skbs);
4821 __skb_queue_tail(list: &skbs, newsk: skb);
4822
4823 hdr = (struct ieee80211_hdr *)skb->data;
4824 sta = sta_info_get(sdata, addr: hdr->addr1);
4825
4826 result = __ieee80211_tx(local, skbs: &skbs, sta, txpending: true);
4827 }
4828
4829 return result;
4830}
4831
4832/*
4833 * Transmit all pending packets. Called from tasklet.
4834 */
4835void ieee80211_tx_pending(struct tasklet_struct *t)
4836{
4837 struct ieee80211_local *local = from_tasklet(local, t,
4838 tx_pending_tasklet);
4839 unsigned long flags;
4840 int i;
4841 bool txok;
4842
4843 rcu_read_lock();
4844
4845 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4846 for (i = 0; i < local->hw.queues; i++) {
4847 /*
4848 * If queue is stopped by something other than due to pending
4849 * frames, or we have no pending frames, proceed to next queue.
4850 */
4851 if (local->queue_stop_reasons[i] ||
4852 skb_queue_empty(list: &local->pending[i]))
4853 continue;
4854
4855 while (!skb_queue_empty(list: &local->pending[i])) {
4856 struct sk_buff *skb = __skb_dequeue(list: &local->pending[i]);
4857 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4858
4859 if (WARN_ON(!info->control.vif)) {
4860 ieee80211_free_txskb(hw: &local->hw, skb);
4861 continue;
4862 }
4863
4864 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock,
4865 flags);
4866
4867 txok = ieee80211_tx_pending_skb(local, skb);
4868 spin_lock_irqsave(&local->queue_stop_reason_lock,
4869 flags);
4870 if (!txok)
4871 break;
4872 }
4873 }
4874 spin_unlock_irqrestore(lock: &local->queue_stop_reason_lock, flags);
4875
4876 rcu_read_unlock();
4877}
4878
4879/* functions for drivers to get certain frames */
4880
4881static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4882 struct ieee80211_link_data *link,
4883 struct ps_data *ps, struct sk_buff *skb,
4884 bool is_template)
4885{
4886 u8 *pos, *tim;
4887 int aid0 = 0;
4888 int i, have_bits = 0, n1, n2;
4889 struct ieee80211_bss_conf *link_conf = link->conf;
4890
4891 /* Generate bitmap for TIM only if there are any STAs in power save
4892 * mode. */
4893 if (atomic_read(v: &ps->num_sta_ps) > 0)
4894 /* in the hope that this is faster than
4895 * checking byte-for-byte */
4896 have_bits = !bitmap_empty(src: (unsigned long *)ps->tim,
4897 IEEE80211_MAX_AID+1);
4898 if (!is_template) {
4899 if (ps->dtim_count == 0)
4900 ps->dtim_count = link_conf->dtim_period - 1;
4901 else
4902 ps->dtim_count--;
4903 }
4904
4905 tim = pos = skb_put(skb, len: 5);
4906 *pos++ = WLAN_EID_TIM;
4907 *pos++ = 3;
4908 *pos++ = ps->dtim_count;
4909 *pos++ = link_conf->dtim_period;
4910
4911 if (ps->dtim_count == 0 && !skb_queue_empty(list: &ps->bc_buf))
4912 aid0 = 1;
4913
4914 ps->dtim_bc_mc = aid0 == 1;
4915
4916 if (have_bits) {
4917 /* Find largest even number N1 so that bits numbered 1 through
4918 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4919 * (N2 + 1) x 8 through 2007 are 0. */
4920 n1 = 0;
4921 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
4922 if (ps->tim[i]) {
4923 n1 = i & 0xfe;
4924 break;
4925 }
4926 }
4927 n2 = n1;
4928 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
4929 if (ps->tim[i]) {
4930 n2 = i;
4931 break;
4932 }
4933 }
4934
4935 /* Bitmap control */
4936 *pos++ = n1 | aid0;
4937 /* Part Virt Bitmap */
4938 skb_put_data(skb, data: ps->tim + n1, len: n2 - n1 + 1);
4939
4940 tim[1] = n2 - n1 + 4;
4941 } else {
4942 *pos++ = aid0; /* Bitmap control */
4943
4944 if (ieee80211_get_link_sband(link)->band != NL80211_BAND_S1GHZ) {
4945 tim[1] = 4;
4946 /* Part Virt Bitmap */
4947 skb_put_u8(skb, val: 0);
4948 }
4949 }
4950}
4951
4952static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
4953 struct ieee80211_link_data *link,
4954 struct ps_data *ps, struct sk_buff *skb,
4955 bool is_template)
4956{
4957 struct ieee80211_local *local = sdata->local;
4958
4959 /*
4960 * Not very nice, but we want to allow the driver to call
4961 * ieee80211_beacon_get() as a response to the set_tim()
4962 * callback. That, however, is already invoked under the
4963 * sta_lock to guarantee consistent and race-free update
4964 * of the tim bitmap in mac80211 and the driver.
4965 */
4966 if (local->tim_in_locked_section) {
4967 __ieee80211_beacon_add_tim(sdata, link, ps, skb, is_template);
4968 } else {
4969 spin_lock_bh(lock: &local->tim_lock);
4970 __ieee80211_beacon_add_tim(sdata, link, ps, skb, is_template);
4971 spin_unlock_bh(lock: &local->tim_lock);
4972 }
4973
4974 return 0;
4975}
4976
4977static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
4978 struct beacon_data *beacon,
4979 struct ieee80211_link_data *link)
4980{
4981 u8 *beacon_data, count, max_count = 1;
4982 struct probe_resp *resp;
4983 size_t beacon_data_len;
4984 u16 *bcn_offsets;
4985 int i;
4986
4987 switch (sdata->vif.type) {
4988 case NL80211_IFTYPE_AP:
4989 beacon_data = beacon->tail;
4990 beacon_data_len = beacon->tail_len;
4991 break;
4992 case NL80211_IFTYPE_ADHOC:
4993 beacon_data = beacon->head;
4994 beacon_data_len = beacon->head_len;
4995 break;
4996 case NL80211_IFTYPE_MESH_POINT:
4997 beacon_data = beacon->head;
4998 beacon_data_len = beacon->head_len;
4999 break;
5000 default:
5001 return;
5002 }
5003
5004 resp = rcu_dereference(link->u.ap.probe_resp);
5005
5006 bcn_offsets = beacon->cntdwn_counter_offsets;
5007 count = beacon->cntdwn_current_counter;
5008 if (link->conf->csa_active)
5009 max_count = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
5010
5011 for (i = 0; i < max_count; ++i) {
5012 if (bcn_offsets[i]) {
5013 if (WARN_ON_ONCE(bcn_offsets[i] >= beacon_data_len))
5014 return;
5015 beacon_data[bcn_offsets[i]] = count;
5016 }
5017
5018 if (sdata->vif.type == NL80211_IFTYPE_AP && resp) {
5019 u16 *resp_offsets = resp->cntdwn_counter_offsets;
5020
5021 resp->data[resp_offsets[i]] = count;
5022 }
5023 }
5024}
5025
5026static u8 __ieee80211_beacon_update_cntdwn(struct beacon_data *beacon)
5027{
5028 beacon->cntdwn_current_counter--;
5029
5030 /* the counter should never reach 0 */
5031 WARN_ON_ONCE(!beacon->cntdwn_current_counter);
5032
5033 return beacon->cntdwn_current_counter;
5034}
5035
5036u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif)
5037{
5038 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5039 struct beacon_data *beacon = NULL;
5040 u8 count = 0;
5041
5042 rcu_read_lock();
5043
5044 if (sdata->vif.type == NL80211_IFTYPE_AP)
5045 beacon = rcu_dereference(sdata->deflink.u.ap.beacon);
5046 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
5047 beacon = rcu_dereference(sdata->u.ibss.presp);
5048 else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
5049 beacon = rcu_dereference(sdata->u.mesh.beacon);
5050
5051 if (!beacon)
5052 goto unlock;
5053
5054 count = __ieee80211_beacon_update_cntdwn(beacon);
5055
5056unlock:
5057 rcu_read_unlock();
5058 return count;
5059}
5060EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
5061
5062void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
5063{
5064 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5065 struct beacon_data *beacon = NULL;
5066
5067 rcu_read_lock();
5068
5069 if (sdata->vif.type == NL80211_IFTYPE_AP)
5070 beacon = rcu_dereference(sdata->deflink.u.ap.beacon);
5071 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
5072 beacon = rcu_dereference(sdata->u.ibss.presp);
5073 else if (ieee80211_vif_is_mesh(vif: &sdata->vif))
5074 beacon = rcu_dereference(sdata->u.mesh.beacon);
5075
5076 if (!beacon)
5077 goto unlock;
5078
5079 if (counter < beacon->cntdwn_current_counter)
5080 beacon->cntdwn_current_counter = counter;
5081
5082unlock:
5083 rcu_read_unlock();
5084}
5085EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
5086
5087bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif)
5088{
5089 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5090 struct beacon_data *beacon = NULL;
5091 u8 *beacon_data;
5092 size_t beacon_data_len;
5093 int ret = false;
5094
5095 if (!ieee80211_sdata_running(sdata))
5096 return false;
5097
5098 rcu_read_lock();
5099 if (vif->type == NL80211_IFTYPE_AP) {
5100 beacon = rcu_dereference(sdata->deflink.u.ap.beacon);
5101 if (WARN_ON(!beacon || !beacon->tail))
5102 goto out;
5103 beacon_data = beacon->tail;
5104 beacon_data_len = beacon->tail_len;
5105 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
5106 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5107
5108 beacon = rcu_dereference(ifibss->presp);
5109 if (!beacon)
5110 goto out;
5111
5112 beacon_data = beacon->head;
5113 beacon_data_len = beacon->head_len;
5114 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
5115 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5116
5117 beacon = rcu_dereference(ifmsh->beacon);
5118 if (!beacon)
5119 goto out;
5120
5121 beacon_data = beacon->head;
5122 beacon_data_len = beacon->head_len;
5123 } else {
5124 WARN_ON(1);
5125 goto out;
5126 }
5127
5128 if (!beacon->cntdwn_counter_offsets[0])
5129 goto out;
5130
5131 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
5132 goto out;
5133
5134 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
5135 ret = true;
5136
5137 out:
5138 rcu_read_unlock();
5139
5140 return ret;
5141}
5142EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
5143
5144static int ieee80211_beacon_protect(struct sk_buff *skb,
5145 struct ieee80211_local *local,
5146 struct ieee80211_sub_if_data *sdata,
5147 struct ieee80211_link_data *link)
5148{
5149 ieee80211_tx_result res;
5150 struct ieee80211_tx_data tx;
5151 struct sk_buff *check_skb;
5152
5153 memset(&tx, 0, sizeof(tx));
5154 tx.key = rcu_dereference(link->default_beacon_key);
5155 if (!tx.key)
5156 return 0;
5157
5158 if (unlikely(tx.key->flags & KEY_FLAG_TAINTED)) {
5159 tx.key = NULL;
5160 return -EINVAL;
5161 }
5162
5163 if (!(tx.key->conf.flags & IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
5164 tx.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
5165 IEEE80211_SKB_CB(skb)->control.hw_key = &tx.key->conf;
5166
5167 tx.local = local;
5168 tx.sdata = sdata;
5169 __skb_queue_head_init(list: &tx.skbs);
5170 __skb_queue_tail(list: &tx.skbs, newsk: skb);
5171 res = ieee80211_tx_h_encrypt(tx: &tx);
5172 check_skb = __skb_dequeue(list: &tx.skbs);
5173 /* we may crash after this, but it'd be a bug in crypto */
5174 WARN_ON(check_skb != skb);
5175 if (WARN_ON_ONCE(res != TX_CONTINUE))
5176 return -EINVAL;
5177
5178 return 0;
5179}
5180
5181static void
5182ieee80211_beacon_get_finish(struct ieee80211_hw *hw,
5183 struct ieee80211_vif *vif,
5184 struct ieee80211_link_data *link,
5185 struct ieee80211_mutable_offsets *offs,
5186 struct beacon_data *beacon,
5187 struct sk_buff *skb,
5188 struct ieee80211_chanctx_conf *chanctx_conf,
5189 u16 csa_off_base)
5190{
5191 struct ieee80211_local *local = hw_to_local(hw);
5192 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5193 struct ieee80211_tx_info *info;
5194 enum nl80211_band band;
5195 struct ieee80211_tx_rate_control txrc;
5196
5197 /* CSA offsets */
5198 if (offs && beacon) {
5199 u16 i;
5200
5201 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
5202 u16 csa_off = beacon->cntdwn_counter_offsets[i];
5203
5204 if (!csa_off)
5205 continue;
5206
5207 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
5208 }
5209 }
5210
5211 band = chanctx_conf->def.chan->band;
5212 info = IEEE80211_SKB_CB(skb);
5213 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5214 info->flags |= IEEE80211_TX_CTL_NO_ACK;
5215 info->band = band;
5216
5217 memset(&txrc, 0, sizeof(txrc));
5218 txrc.hw = hw;
5219 txrc.sband = local->hw.wiphy->bands[band];
5220 txrc.bss_conf = link->conf;
5221 txrc.skb = skb;
5222 txrc.reported_rate.idx = -1;
5223 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
5224 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
5225 else
5226 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
5227 txrc.bss = true;
5228 rate_control_get_rate(sdata, NULL, txrc: &txrc);
5229
5230 info->control.vif = vif;
5231 info->control.flags |= u32_encode_bits(v: link->link_id,
5232 field: IEEE80211_TX_CTRL_MLO_LINK);
5233 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
5234 IEEE80211_TX_CTL_ASSIGN_SEQ |
5235 IEEE80211_TX_CTL_FIRST_FRAGMENT;
5236}
5237
5238static void
5239ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon,
5240 u8 i)
5241{
5242 if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt ||
5243 i > beacon->mbssid_ies->cnt)
5244 return;
5245
5246 if (i < beacon->mbssid_ies->cnt) {
5247 skb_put_data(skb, data: beacon->mbssid_ies->elem[i].data,
5248 len: beacon->mbssid_ies->elem[i].len);
5249
5250 if (beacon->rnr_ies && beacon->rnr_ies->cnt) {
5251 skb_put_data(skb, data: beacon->rnr_ies->elem[i].data,
5252 len: beacon->rnr_ies->elem[i].len);
5253
5254 for (i = beacon->mbssid_ies->cnt; i < beacon->rnr_ies->cnt; i++)
5255 skb_put_data(skb, data: beacon->rnr_ies->elem[i].data,
5256 len: beacon->rnr_ies->elem[i].len);
5257 }
5258 return;
5259 }
5260
5261 /* i == beacon->mbssid_ies->cnt, include all MBSSID elements */
5262 for (i = 0; i < beacon->mbssid_ies->cnt; i++)
5263 skb_put_data(skb, data: beacon->mbssid_ies->elem[i].data,
5264 len: beacon->mbssid_ies->elem[i].len);
5265}
5266
5267static struct sk_buff *
5268ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
5269 struct ieee80211_vif *vif,
5270 struct ieee80211_link_data *link,
5271 struct ieee80211_mutable_offsets *offs,
5272 bool is_template,
5273 struct beacon_data *beacon,
5274 struct ieee80211_chanctx_conf *chanctx_conf,
5275 u8 ema_index)
5276{
5277 struct ieee80211_local *local = hw_to_local(hw);
5278 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5279 struct ieee80211_if_ap *ap = &sdata->u.ap;
5280 struct sk_buff *skb = NULL;
5281 u16 csa_off_base = 0;
5282 int mbssid_len;
5283
5284 if (beacon->cntdwn_counter_offsets[0]) {
5285 if (!is_template)
5286 ieee80211_beacon_update_cntdwn(vif);
5287
5288 ieee80211_set_beacon_cntdwn(sdata, beacon, link);
5289 }
5290
5291 /* headroom, head length,
5292 * tail length, maximum TIM length and multiple BSSID length
5293 */
5294 mbssid_len = ieee80211_get_mbssid_beacon_len(elems: beacon->mbssid_ies,
5295 rnr_elems: beacon->rnr_ies,
5296 i: ema_index);
5297
5298 skb = dev_alloc_skb(length: local->tx_headroom + beacon->head_len +
5299 beacon->tail_len + 256 +
5300 local->hw.extra_beacon_tailroom + mbssid_len);
5301 if (!skb)
5302 return NULL;
5303
5304 skb_reserve(skb, len: local->tx_headroom);
5305 skb_put_data(skb, data: beacon->head, len: beacon->head_len);
5306
5307 ieee80211_beacon_add_tim(sdata, link, ps: &ap->ps, skb, is_template);
5308
5309 if (offs) {
5310 offs->tim_offset = beacon->head_len;
5311 offs->tim_length = skb->len - beacon->head_len;
5312 offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0];
5313
5314 if (mbssid_len) {
5315 ieee80211_beacon_add_mbssid(skb, beacon, i: ema_index);
5316 offs->mbssid_off = skb->len - mbssid_len;
5317 }
5318
5319 /* for AP the csa offsets are from tail */
5320 csa_off_base = skb->len;
5321 }
5322
5323 if (beacon->tail)
5324 skb_put_data(skb, data: beacon->tail, len: beacon->tail_len);
5325
5326 if (ieee80211_beacon_protect(skb, local, sdata, link) < 0)
5327 return NULL;
5328
5329 ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5330 chanctx_conf, csa_off_base);
5331 return skb;
5332}
5333
5334static struct ieee80211_ema_beacons *
5335ieee80211_beacon_get_ap_ema_list(struct ieee80211_hw *hw,
5336 struct ieee80211_vif *vif,
5337 struct ieee80211_link_data *link,
5338 struct ieee80211_mutable_offsets *offs,
5339 bool is_template, struct beacon_data *beacon,
5340 struct ieee80211_chanctx_conf *chanctx_conf)
5341{
5342 struct ieee80211_ema_beacons *ema = NULL;
5343
5344 if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt)
5345 return NULL;
5346
5347 ema = kzalloc(struct_size(ema, bcn, beacon->mbssid_ies->cnt),
5348 GFP_ATOMIC);
5349 if (!ema)
5350 return NULL;
5351
5352 for (ema->cnt = 0; ema->cnt < beacon->mbssid_ies->cnt; ema->cnt++) {
5353 ema->bcn[ema->cnt].skb =
5354 ieee80211_beacon_get_ap(hw, vif, link,
5355 offs: &ema->bcn[ema->cnt].offs,
5356 is_template, beacon,
5357 chanctx_conf, ema_index: ema->cnt);
5358 if (!ema->bcn[ema->cnt].skb)
5359 break;
5360 }
5361
5362 if (ema->cnt == beacon->mbssid_ies->cnt)
5363 return ema;
5364
5365 ieee80211_beacon_free_ema_list(ema_beacons: ema);
5366 return NULL;
5367}
5368
5369#define IEEE80211_INCLUDE_ALL_MBSSID_ELEMS -1
5370
5371static struct sk_buff *
5372__ieee80211_beacon_get(struct ieee80211_hw *hw,
5373 struct ieee80211_vif *vif,
5374 struct ieee80211_mutable_offsets *offs,
5375 bool is_template,
5376 unsigned int link_id,
5377 int ema_index,
5378 struct ieee80211_ema_beacons **ema_beacons)
5379{
5380 struct ieee80211_local *local = hw_to_local(hw);
5381 struct beacon_data *beacon = NULL;
5382 struct sk_buff *skb = NULL;
5383 struct ieee80211_sub_if_data *sdata = NULL;
5384 struct ieee80211_chanctx_conf *chanctx_conf;
5385 struct ieee80211_link_data *link;
5386
5387 rcu_read_lock();
5388
5389 sdata = vif_to_sdata(p: vif);
5390 link = rcu_dereference(sdata->link[link_id]);
5391 if (!link)
5392 goto out;
5393 chanctx_conf =
5394 rcu_dereference(link->conf->chanctx_conf);
5395
5396 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
5397 goto out;
5398
5399 if (offs)
5400 memset(offs, 0, sizeof(*offs));
5401
5402 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5403 beacon = rcu_dereference(link->u.ap.beacon);
5404 if (!beacon)
5405 goto out;
5406
5407 if (ema_beacons) {
5408 *ema_beacons =
5409 ieee80211_beacon_get_ap_ema_list(hw, vif, link,
5410 offs,
5411 is_template,
5412 beacon,
5413 chanctx_conf);
5414 } else {
5415 if (beacon->mbssid_ies && beacon->mbssid_ies->cnt) {
5416 if (ema_index >= beacon->mbssid_ies->cnt)
5417 goto out; /* End of MBSSID elements */
5418
5419 if (ema_index <= IEEE80211_INCLUDE_ALL_MBSSID_ELEMS)
5420 ema_index = beacon->mbssid_ies->cnt;
5421 } else {
5422 ema_index = 0;
5423 }
5424
5425 skb = ieee80211_beacon_get_ap(hw, vif, link, offs,
5426 is_template, beacon,
5427 chanctx_conf,
5428 ema_index);
5429 }
5430 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
5431 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5432 struct ieee80211_hdr *hdr;
5433
5434 beacon = rcu_dereference(ifibss->presp);
5435 if (!beacon)
5436 goto out;
5437
5438 if (beacon->cntdwn_counter_offsets[0]) {
5439 if (!is_template)
5440 __ieee80211_beacon_update_cntdwn(beacon);
5441
5442 ieee80211_set_beacon_cntdwn(sdata, beacon, link);
5443 }
5444
5445 skb = dev_alloc_skb(length: local->tx_headroom + beacon->head_len +
5446 local->hw.extra_beacon_tailroom);
5447 if (!skb)
5448 goto out;
5449 skb_reserve(skb, len: local->tx_headroom);
5450 skb_put_data(skb, data: beacon->head, len: beacon->head_len);
5451
5452 hdr = (struct ieee80211_hdr *) skb->data;
5453 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5454 IEEE80211_STYPE_BEACON);
5455
5456 ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5457 chanctx_conf, csa_off_base: 0);
5458 } else if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
5459 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5460
5461 beacon = rcu_dereference(ifmsh->beacon);
5462 if (!beacon)
5463 goto out;
5464
5465 if (beacon->cntdwn_counter_offsets[0]) {
5466 if (!is_template)
5467 /* TODO: For mesh csa_counter is in TU, so
5468 * decrementing it by one isn't correct, but
5469 * for now we leave it consistent with overall
5470 * mac80211's behavior.
5471 */
5472 __ieee80211_beacon_update_cntdwn(beacon);
5473
5474 ieee80211_set_beacon_cntdwn(sdata, beacon, link);
5475 }
5476
5477 if (ifmsh->sync_ops)
5478 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
5479
5480 skb = dev_alloc_skb(length: local->tx_headroom +
5481 beacon->head_len +
5482 256 + /* TIM IE */
5483 beacon->tail_len +
5484 local->hw.extra_beacon_tailroom);
5485 if (!skb)
5486 goto out;
5487 skb_reserve(skb, len: local->tx_headroom);
5488 skb_put_data(skb, data: beacon->head, len: beacon->head_len);
5489 ieee80211_beacon_add_tim(sdata, link, ps: &ifmsh->ps, skb,
5490 is_template);
5491
5492 if (offs) {
5493 offs->tim_offset = beacon->head_len;
5494 offs->tim_length = skb->len - beacon->head_len;
5495 }
5496
5497 skb_put_data(skb, data: beacon->tail, len: beacon->tail_len);
5498 ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5499 chanctx_conf, csa_off_base: 0);
5500 } else {
5501 WARN_ON(1);
5502 goto out;
5503 }
5504
5505 out:
5506 rcu_read_unlock();
5507 return skb;
5508
5509}
5510
5511struct sk_buff *
5512ieee80211_beacon_get_template(struct ieee80211_hw *hw,
5513 struct ieee80211_vif *vif,
5514 struct ieee80211_mutable_offsets *offs,
5515 unsigned int link_id)
5516{
5517 return __ieee80211_beacon_get(hw, vif, offs, is_template: true, link_id,
5518 IEEE80211_INCLUDE_ALL_MBSSID_ELEMS, NULL);
5519}
5520EXPORT_SYMBOL(ieee80211_beacon_get_template);
5521
5522struct sk_buff *
5523ieee80211_beacon_get_template_ema_index(struct ieee80211_hw *hw,
5524 struct ieee80211_vif *vif,
5525 struct ieee80211_mutable_offsets *offs,
5526 unsigned int link_id, u8 ema_index)
5527{
5528 return __ieee80211_beacon_get(hw, vif, offs, is_template: true, link_id, ema_index,
5529 NULL);
5530}
5531EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_index);
5532
5533void ieee80211_beacon_free_ema_list(struct ieee80211_ema_beacons *ema_beacons)
5534{
5535 u8 i;
5536
5537 if (!ema_beacons)
5538 return;
5539
5540 for (i = 0; i < ema_beacons->cnt; i++)
5541 kfree_skb(skb: ema_beacons->bcn[i].skb);
5542
5543 kfree(objp: ema_beacons);
5544}
5545EXPORT_SYMBOL(ieee80211_beacon_free_ema_list);
5546
5547struct ieee80211_ema_beacons *
5548ieee80211_beacon_get_template_ema_list(struct ieee80211_hw *hw,
5549 struct ieee80211_vif *vif,
5550 unsigned int link_id)
5551{
5552 struct ieee80211_ema_beacons *ema_beacons = NULL;
5553
5554 WARN_ON(__ieee80211_beacon_get(hw, vif, NULL, true, link_id, 0,
5555 &ema_beacons));
5556
5557 return ema_beacons;
5558}
5559EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_list);
5560
5561struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
5562 struct ieee80211_vif *vif,
5563 u16 *tim_offset, u16 *tim_length,
5564 unsigned int link_id)
5565{
5566 struct ieee80211_mutable_offsets offs = {};
5567 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, offs: &offs, is_template: false,
5568 link_id,
5569 IEEE80211_INCLUDE_ALL_MBSSID_ELEMS,
5570 NULL);
5571 struct sk_buff *copy;
5572
5573 if (!bcn)
5574 return bcn;
5575
5576 if (tim_offset)
5577 *tim_offset = offs.tim_offset;
5578
5579 if (tim_length)
5580 *tim_length = offs.tim_length;
5581
5582 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
5583 !hw_to_local(hw)->monitors)
5584 return bcn;
5585
5586 /* send a copy to monitor interfaces */
5587 copy = skb_copy(skb: bcn, GFP_ATOMIC);
5588 if (!copy)
5589 return bcn;
5590
5591 ieee80211_tx_monitor(local: hw_to_local(hw), skb: copy, retry_count: 1, send_to_cooked: false, NULL);
5592
5593 return bcn;
5594}
5595EXPORT_SYMBOL(ieee80211_beacon_get_tim);
5596
5597struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
5598 struct ieee80211_vif *vif)
5599{
5600 struct sk_buff *skb = NULL;
5601 struct probe_resp *presp = NULL;
5602 struct ieee80211_hdr *hdr;
5603 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5604
5605 if (sdata->vif.type != NL80211_IFTYPE_AP)
5606 return NULL;
5607
5608 rcu_read_lock();
5609 presp = rcu_dereference(sdata->deflink.u.ap.probe_resp);
5610 if (!presp)
5611 goto out;
5612
5613 skb = dev_alloc_skb(length: presp->len);
5614 if (!skb)
5615 goto out;
5616
5617 skb_put_data(skb, data: presp->data, len: presp->len);
5618
5619 hdr = (struct ieee80211_hdr *) skb->data;
5620 memset(hdr->addr1, 0, sizeof(hdr->addr1));
5621
5622out:
5623 rcu_read_unlock();
5624 return skb;
5625}
5626EXPORT_SYMBOL(ieee80211_proberesp_get);
5627
5628struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
5629 struct ieee80211_vif *vif)
5630{
5631 struct sk_buff *skb = NULL;
5632 struct fils_discovery_data *tmpl = NULL;
5633 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5634
5635 if (sdata->vif.type != NL80211_IFTYPE_AP)
5636 return NULL;
5637
5638 rcu_read_lock();
5639 tmpl = rcu_dereference(sdata->deflink.u.ap.fils_discovery);
5640 if (!tmpl) {
5641 rcu_read_unlock();
5642 return NULL;
5643 }
5644
5645 skb = dev_alloc_skb(length: sdata->local->hw.extra_tx_headroom + tmpl->len);
5646 if (skb) {
5647 skb_reserve(skb, len: sdata->local->hw.extra_tx_headroom);
5648 skb_put_data(skb, data: tmpl->data, len: tmpl->len);
5649 }
5650
5651 rcu_read_unlock();
5652 return skb;
5653}
5654EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5655
5656struct sk_buff *
5657ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5658 struct ieee80211_vif *vif)
5659{
5660 struct sk_buff *skb = NULL;
5661 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5662 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5663
5664 if (sdata->vif.type != NL80211_IFTYPE_AP)
5665 return NULL;
5666
5667 rcu_read_lock();
5668 tmpl = rcu_dereference(sdata->deflink.u.ap.unsol_bcast_probe_resp);
5669 if (!tmpl) {
5670 rcu_read_unlock();
5671 return NULL;
5672 }
5673
5674 skb = dev_alloc_skb(length: sdata->local->hw.extra_tx_headroom + tmpl->len);
5675 if (skb) {
5676 skb_reserve(skb, len: sdata->local->hw.extra_tx_headroom);
5677 skb_put_data(skb, data: tmpl->data, len: tmpl->len);
5678 }
5679
5680 rcu_read_unlock();
5681 return skb;
5682}
5683EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5684
5685struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5686 struct ieee80211_vif *vif)
5687{
5688 struct ieee80211_sub_if_data *sdata;
5689 struct ieee80211_pspoll *pspoll;
5690 struct ieee80211_local *local;
5691 struct sk_buff *skb;
5692
5693 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5694 return NULL;
5695
5696 sdata = vif_to_sdata(p: vif);
5697 local = sdata->local;
5698
5699 skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + sizeof(*pspoll));
5700 if (!skb)
5701 return NULL;
5702
5703 skb_reserve(skb, len: local->hw.extra_tx_headroom);
5704
5705 pspoll = skb_put_zero(skb, len: sizeof(*pspoll));
5706 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5707 IEEE80211_STYPE_PSPOLL);
5708 pspoll->aid = cpu_to_le16(sdata->vif.cfg.aid);
5709
5710 /* aid in PS-Poll has its two MSBs each set to 1 */
5711 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5712
5713 memcpy(pspoll->bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN);
5714 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5715
5716 return skb;
5717}
5718EXPORT_SYMBOL(ieee80211_pspoll_get);
5719
5720struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
5721 struct ieee80211_vif *vif,
5722 int link_id, bool qos_ok)
5723{
5724 struct ieee80211_sub_if_data *sdata = vif_to_sdata(p: vif);
5725 struct ieee80211_local *local = sdata->local;
5726 struct ieee80211_link_data *link = NULL;
5727 struct ieee80211_hdr_3addr *nullfunc;
5728 struct sk_buff *skb;
5729 bool qos = false;
5730
5731 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5732 return NULL;
5733
5734 skb = dev_alloc_skb(length: local->hw.extra_tx_headroom +
5735 sizeof(*nullfunc) + 2);
5736 if (!skb)
5737 return NULL;
5738
5739 rcu_read_lock();
5740 if (qos_ok) {
5741 struct sta_info *sta;
5742
5743 sta = sta_info_get(sdata, addr: vif->cfg.ap_addr);
5744 qos = sta && sta->sta.wme;
5745 }
5746
5747 if (link_id >= 0) {
5748 link = rcu_dereference(sdata->link[link_id]);
5749 if (WARN_ON_ONCE(!link)) {
5750 rcu_read_unlock();
5751 kfree_skb(skb);
5752 return NULL;
5753 }
5754 }
5755
5756 skb_reserve(skb, len: local->hw.extra_tx_headroom);
5757
5758 nullfunc = skb_put_zero(skb, len: sizeof(*nullfunc));
5759 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5760 IEEE80211_STYPE_NULLFUNC |
5761 IEEE80211_FCTL_TODS);
5762 if (qos) {
5763 __le16 qoshdr = cpu_to_le16(7);
5764
5765 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5766 IEEE80211_STYPE_NULLFUNC) !=
5767 IEEE80211_STYPE_QOS_NULLFUNC);
5768 nullfunc->frame_control |=
5769 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5770 skb->priority = 7;
5771 skb_set_queue_mapping(skb, queue_mapping: IEEE80211_AC_VO);
5772 skb_put_data(skb, data: &qoshdr, len: sizeof(qoshdr));
5773 }
5774
5775 if (link) {
5776 memcpy(nullfunc->addr1, link->conf->bssid, ETH_ALEN);
5777 memcpy(nullfunc->addr2, link->conf->addr, ETH_ALEN);
5778 memcpy(nullfunc->addr3, link->conf->bssid, ETH_ALEN);
5779 } else {
5780 memcpy(nullfunc->addr1, vif->cfg.ap_addr, ETH_ALEN);
5781 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5782 memcpy(nullfunc->addr3, vif->cfg.ap_addr, ETH_ALEN);
5783 }
5784 rcu_read_unlock();
5785
5786 return skb;
5787}
5788EXPORT_SYMBOL(ieee80211_nullfunc_get);
5789
5790struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
5791 const u8 *src_addr,
5792 const u8 *ssid, size_t ssid_len,
5793 size_t tailroom)
5794{
5795 struct ieee80211_local *local = hw_to_local(hw);
5796 struct ieee80211_hdr_3addr *hdr;
5797 struct sk_buff *skb;
5798 size_t ie_ssid_len;
5799 u8 *pos;
5800
5801 ie_ssid_len = 2 + ssid_len;
5802
5803 skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + sizeof(*hdr) +
5804 ie_ssid_len + tailroom);
5805 if (!skb)
5806 return NULL;
5807
5808 skb_reserve(skb, len: local->hw.extra_tx_headroom);
5809
5810 hdr = skb_put_zero(skb, len: sizeof(*hdr));
5811 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5812 IEEE80211_STYPE_PROBE_REQ);
5813 eth_broadcast_addr(addr: hdr->addr1);
5814 memcpy(hdr->addr2, src_addr, ETH_ALEN);
5815 eth_broadcast_addr(addr: hdr->addr3);
5816
5817 pos = skb_put(skb, len: ie_ssid_len);
5818 *pos++ = WLAN_EID_SSID;
5819 *pos++ = ssid_len;
5820 if (ssid_len)
5821 memcpy(pos, ssid, ssid_len);
5822 pos += ssid_len;
5823
5824 return skb;
5825}
5826EXPORT_SYMBOL(ieee80211_probereq_get);
5827
5828void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5829 const void *frame, size_t frame_len,
5830 const struct ieee80211_tx_info *frame_txctl,
5831 struct ieee80211_rts *rts)
5832{
5833 const struct ieee80211_hdr *hdr = frame;
5834
5835 rts->frame_control =
5836 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
5837 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5838 frame_txctl);
5839 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5840 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5841}
5842EXPORT_SYMBOL(ieee80211_rts_get);
5843
5844void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5845 const void *frame, size_t frame_len,
5846 const struct ieee80211_tx_info *frame_txctl,
5847 struct ieee80211_cts *cts)
5848{
5849 const struct ieee80211_hdr *hdr = frame;
5850
5851 cts->frame_control =
5852 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
5853 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5854 frame_len, frame_txctl);
5855 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5856}
5857EXPORT_SYMBOL(ieee80211_ctstoself_get);
5858
5859struct sk_buff *
5860ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
5861 struct ieee80211_vif *vif)
5862{
5863 struct ieee80211_local *local = hw_to_local(hw);
5864 struct sk_buff *skb = NULL;
5865 struct ieee80211_tx_data tx;
5866 struct ieee80211_sub_if_data *sdata;
5867 struct ps_data *ps;
5868 struct ieee80211_tx_info *info;
5869 struct ieee80211_chanctx_conf *chanctx_conf;
5870
5871 sdata = vif_to_sdata(p: vif);
5872
5873 rcu_read_lock();
5874 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
5875
5876 if (!chanctx_conf)
5877 goto out;
5878
5879 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5880 struct beacon_data *beacon =
5881 rcu_dereference(sdata->deflink.u.ap.beacon);
5882
5883 if (!beacon || !beacon->head)
5884 goto out;
5885
5886 ps = &sdata->u.ap.ps;
5887 } else if (ieee80211_vif_is_mesh(vif: &sdata->vif)) {
5888 ps = &sdata->u.mesh.ps;
5889 } else {
5890 goto out;
5891 }
5892
5893 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
5894 goto out; /* send buffered bc/mc only after DTIM beacon */
5895
5896 while (1) {
5897 skb = skb_dequeue(list: &ps->bc_buf);
5898 if (!skb)
5899 goto out;
5900 local->total_ps_buffered--;
5901
5902 if (!skb_queue_empty(list: &ps->bc_buf) && skb->len >= 2) {
5903 struct ieee80211_hdr *hdr =
5904 (struct ieee80211_hdr *) skb->data;
5905 /* more buffered multicast/broadcast frames ==> set
5906 * MoreData flag in IEEE 802.11 header to inform PS
5907 * STAs */
5908 hdr->frame_control |=
5909 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5910 }
5911
5912 if (sdata->vif.type == NL80211_IFTYPE_AP)
5913 sdata = IEEE80211_DEV_TO_SUB_IF(dev: skb->dev);
5914 if (!ieee80211_tx_prepare(sdata, tx: &tx, NULL, skb))
5915 break;
5916 ieee80211_free_txskb(hw, skb);
5917 }
5918
5919 info = IEEE80211_SKB_CB(skb);
5920
5921 tx.flags |= IEEE80211_TX_PS_BUFFERED;
5922 info->band = chanctx_conf->def.chan->band;
5923
5924 if (invoke_tx_handlers(tx: &tx))
5925 skb = NULL;
5926 out:
5927 rcu_read_unlock();
5928
5929 return skb;
5930}
5931EXPORT_SYMBOL(ieee80211_get_buffered_bc);
5932
5933int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5934{
5935 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5936 struct ieee80211_sub_if_data *sdata = sta->sdata;
5937 struct ieee80211_local *local = sdata->local;
5938 int ret;
5939 u32 queues;
5940
5941 lockdep_assert_wiphy(local->hw.wiphy);
5942
5943 /* only some cases are supported right now */
5944 switch (sdata->vif.type) {
5945 case NL80211_IFTYPE_STATION:
5946 case NL80211_IFTYPE_AP:
5947 case NL80211_IFTYPE_AP_VLAN:
5948 break;
5949 default:
5950 WARN_ON(1);
5951 return -EINVAL;
5952 }
5953
5954 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5955 return -EINVAL;
5956
5957 if (sta->reserved_tid == tid) {
5958 ret = 0;
5959 goto out;
5960 }
5961
5962 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5963 sdata_err(sdata, "TID reservation already active\n");
5964 ret = -EALREADY;
5965 goto out;
5966 }
5967
5968 ieee80211_stop_vif_queues(local: sdata->local, sdata,
5969 reason: IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5970
5971 synchronize_net();
5972
5973 /* Tear down BA sessions so we stop aggregating on this TID */
5974 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
5975 set_sta_flag(sta, flag: WLAN_STA_BLOCK_BA);
5976 __ieee80211_stop_tx_ba_session(sta, tid,
5977 reason: AGG_STOP_LOCAL_REQUEST);
5978 }
5979
5980 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
5981 __ieee80211_flush_queues(local, sdata, queues, drop: false);
5982
5983 sta->reserved_tid = tid;
5984
5985 ieee80211_wake_vif_queues(local, sdata,
5986 reason: IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5987
5988 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
5989 clear_sta_flag(sta, flag: WLAN_STA_BLOCK_BA);
5990
5991 ret = 0;
5992 out:
5993 return ret;
5994}
5995EXPORT_SYMBOL(ieee80211_reserve_tid);
5996
5997void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5998{
5999 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
6000 struct ieee80211_sub_if_data *sdata = sta->sdata;
6001
6002 lockdep_assert_wiphy(sdata->local->hw.wiphy);
6003
6004 /* only some cases are supported right now */
6005 switch (sdata->vif.type) {
6006 case NL80211_IFTYPE_STATION:
6007 case NL80211_IFTYPE_AP:
6008 case NL80211_IFTYPE_AP_VLAN:
6009 break;
6010 default:
6011 WARN_ON(1);
6012 return;
6013 }
6014
6015 if (tid != sta->reserved_tid) {
6016 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
6017 return;
6018 }
6019
6020 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
6021}
6022EXPORT_SYMBOL(ieee80211_unreserve_tid);
6023
6024void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
6025 struct sk_buff *skb, int tid, int link_id,
6026 enum nl80211_band band)
6027{
6028 const struct ieee80211_hdr *hdr = (void *)skb->data;
6029 int ac = ieee80211_ac_from_tid(tid);
6030 unsigned int link;
6031
6032 skb_reset_mac_header(skb);
6033 skb_set_queue_mapping(skb, queue_mapping: ac);
6034 skb->priority = tid;
6035
6036 skb->dev = sdata->dev;
6037
6038 BUILD_BUG_ON(IEEE80211_LINK_UNSPECIFIED < IEEE80211_MLD_MAX_NUM_LINKS);
6039 BUILD_BUG_ON(!FIELD_FIT(IEEE80211_TX_CTRL_MLO_LINK,
6040 IEEE80211_LINK_UNSPECIFIED));
6041
6042 if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
6043 link = 0;
6044 } else if (link_id >= 0) {
6045 link = link_id;
6046 } else if (memcmp(p: sdata->vif.addr, q: hdr->addr2, ETH_ALEN) == 0) {
6047 /* address from the MLD */
6048 link = IEEE80211_LINK_UNSPECIFIED;
6049 } else {
6050 /* otherwise must be addressed from a link */
6051 rcu_read_lock();
6052 for (link = 0; link < ARRAY_SIZE(sdata->vif.link_conf); link++) {
6053 struct ieee80211_bss_conf *link_conf;
6054
6055 link_conf = rcu_dereference(sdata->vif.link_conf[link]);
6056 if (!link_conf)
6057 continue;
6058 if (memcmp(p: link_conf->addr, q: hdr->addr2, ETH_ALEN) == 0)
6059 break;
6060 }
6061 rcu_read_unlock();
6062
6063 if (WARN_ON_ONCE(link == ARRAY_SIZE(sdata->vif.link_conf)))
6064 link = ffs(sdata->vif.active_links) - 1;
6065 }
6066
6067 IEEE80211_SKB_CB(skb)->control.flags |=
6068 u32_encode_bits(v: link, field: IEEE80211_TX_CTRL_MLO_LINK);
6069
6070 /*
6071 * The other path calling ieee80211_xmit is from the tasklet,
6072 * and while we can handle concurrent transmissions locking
6073 * requirements are that we do not come into tx with bhs on.
6074 */
6075 local_bh_disable();
6076 IEEE80211_SKB_CB(skb)->band = band;
6077 ieee80211_xmit(sdata, NULL, skb);
6078 local_bh_enable();
6079}
6080
6081void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
6082 struct sk_buff *skb, int tid, int link_id)
6083{
6084 struct ieee80211_chanctx_conf *chanctx_conf;
6085 enum nl80211_band band;
6086
6087 rcu_read_lock();
6088 if (!ieee80211_vif_is_mld(vif: &sdata->vif)) {
6089 WARN_ON(link_id >= 0);
6090 chanctx_conf =
6091 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
6092 if (WARN_ON(!chanctx_conf)) {
6093 rcu_read_unlock();
6094 kfree_skb(skb);
6095 return;
6096 }
6097 band = chanctx_conf->def.chan->band;
6098 } else {
6099 WARN_ON(link_id >= 0 &&
6100 !(sdata->vif.active_links & BIT(link_id)));
6101 /* MLD transmissions must not rely on the band */
6102 band = 0;
6103 }
6104
6105 __ieee80211_tx_skb_tid_band(sdata, skb, tid, link_id, band);
6106 rcu_read_unlock();
6107}
6108
6109int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
6110 const u8 *buf, size_t len,
6111 const u8 *dest, __be16 proto, bool unencrypted,
6112 int link_id, u64 *cookie)
6113{
6114 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
6115 struct ieee80211_local *local = sdata->local;
6116 struct sta_info *sta;
6117 struct sk_buff *skb;
6118 struct ethhdr *ehdr;
6119 u32 ctrl_flags = 0;
6120 u32 flags = 0;
6121 int err;
6122
6123 /* mutex lock is only needed for incrementing the cookie counter */
6124 lockdep_assert_wiphy(local->hw.wiphy);
6125
6126 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
6127 * or Pre-Authentication
6128 */
6129 if (proto != sdata->control_port_protocol &&
6130 proto != cpu_to_be16(ETH_P_PREAUTH))
6131 return -EINVAL;
6132
6133 if (proto == sdata->control_port_protocol)
6134 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
6135 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
6136
6137 if (unencrypted)
6138 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
6139
6140 if (cookie)
6141 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
6142
6143 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
6144
6145 skb = dev_alloc_skb(length: local->hw.extra_tx_headroom +
6146 sizeof(struct ethhdr) + len);
6147 if (!skb)
6148 return -ENOMEM;
6149
6150 skb_reserve(skb, len: local->hw.extra_tx_headroom + sizeof(struct ethhdr));
6151
6152 skb_put_data(skb, data: buf, len);
6153
6154 ehdr = skb_push(skb, len: sizeof(struct ethhdr));
6155 memcpy(ehdr->h_dest, dest, ETH_ALEN);
6156
6157 /* we may override the SA for MLO STA later */
6158 if (link_id < 0) {
6159 ctrl_flags |= u32_encode_bits(IEEE80211_LINK_UNSPECIFIED,
6160 field: IEEE80211_TX_CTRL_MLO_LINK);
6161 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
6162 } else {
6163 struct ieee80211_bss_conf *link_conf;
6164
6165 ctrl_flags |= u32_encode_bits(v: link_id,
6166 field: IEEE80211_TX_CTRL_MLO_LINK);
6167
6168 rcu_read_lock();
6169 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
6170 if (!link_conf) {
6171 dev_kfree_skb(skb);
6172 rcu_read_unlock();
6173 return -ENOLINK;
6174 }
6175 memcpy(ehdr->h_source, link_conf->addr, ETH_ALEN);
6176 rcu_read_unlock();
6177 }
6178
6179 ehdr->h_proto = proto;
6180
6181 skb->dev = dev;
6182 skb->protocol = proto;
6183 skb_reset_network_header(skb);
6184 skb_reset_mac_header(skb);
6185
6186 if (local->hw.queues < IEEE80211_NUM_ACS)
6187 goto start_xmit;
6188
6189 /* update QoS header to prioritize control port frames if possible,
6190 * priorization also happens for control port frames send over
6191 * AF_PACKET
6192 */
6193 rcu_read_lock();
6194 err = ieee80211_lookup_ra_sta(sdata, skb, sta_out: &sta);
6195 if (err) {
6196 dev_kfree_skb(skb);
6197 rcu_read_unlock();
6198 return err;
6199 }
6200
6201 if (!IS_ERR(ptr: sta)) {
6202 u16 queue = ieee80211_select_queue(sdata, sta, skb);
6203
6204 skb_set_queue_mapping(skb, queue_mapping: queue);
6205
6206 /*
6207 * for MLO STA, the SA should be the AP MLD address, but
6208 * the link ID has been selected already
6209 */
6210 if (sta && sta->sta.mlo)
6211 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
6212 }
6213 rcu_read_unlock();
6214
6215start_xmit:
6216 local_bh_disable();
6217 __ieee80211_subif_start_xmit(skb, dev: skb->dev, info_flags: flags, ctrl_flags, cookie);
6218 local_bh_enable();
6219
6220 return 0;
6221}
6222
6223int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
6224 const u8 *buf, size_t len)
6225{
6226 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
6227 struct ieee80211_local *local = sdata->local;
6228 struct sk_buff *skb;
6229
6230 skb = dev_alloc_skb(length: local->hw.extra_tx_headroom + len +
6231 30 + /* header size */
6232 18); /* 11s header size */
6233 if (!skb)
6234 return -ENOMEM;
6235
6236 skb_reserve(skb, len: local->hw.extra_tx_headroom);
6237 skb_put_data(skb, data: buf, len);
6238
6239 skb->dev = dev;
6240 skb->protocol = htons(ETH_P_802_3);
6241 skb_reset_network_header(skb);
6242 skb_reset_mac_header(skb);
6243
6244 local_bh_disable();
6245 __ieee80211_subif_start_xmit(skb, dev: skb->dev, info_flags: 0,
6246 ctrl_flags: IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,
6247 NULL);
6248 local_bh_enable();
6249
6250 return 0;
6251}
6252

source code of linux/net/mac80211/tx.c