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Merge tag 'pci-v6.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
[linux-2.6-block.git] / net / mac80211 / tx.c
CommitLineData
d2912cb1 1// SPDX-License-Identifier: GPL-2.0-only
e2ebc74d
JB		 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>
d98ad83e 7 * Copyright 2013-2014 Intel Mobile Communications GmbH
d19bac3d 8 * Copyright (C) 2018-2025 Intel Corporation
e2ebc74d 9 *
e2ebc74d
JB		 10 * Transmit and frame generation functions.
11 */
12
13#include <linux/kernel.h>
14#include <linux/slab.h>
15#include <linux/skbuff.h>
ebceec86 16#include <linux/if_vlan.h>
e2ebc74d
JB		 17#include <linux/etherdevice.h>
18#include <linux/bitmap.h>
d4e46a3d 19#include <linux/rcupdate.h>
bc3b2d7f 20#include <linux/export.h>
881d966b 21#include <net/net_namespace.h>
e2ebc74d
JB		 22#include <net/ieee80211_radiotap.h>
23#include <net/cfg80211.h>
24#include <net/mac80211.h>
5caa328e
MK		 25#include <net/codel.h>
26#include <net/codel_impl.h>
5f60d5f6 27#include <linux/unaligned.h>
fa962b92 28#include <net/fq_impl.h>
76a853f8 29#include <net/sock.h>
d457a0e3 30#include <net/gso.h>
e2ebc74d
JB		 31
32#include "ieee80211_i.h"
24487981 33#include "driver-ops.h"
2c8dccc7 34#include "led.h"
33b64eb2 35#include "mesh.h"
e2ebc74d
JB		 36#include "wep.h"
37#include "wpa.h"
38#include "wme.h"
2c8dccc7 39#include "rate.h"
e2ebc74d 40
e2ebc74d
JB		 41/* misc utils */
42
252b86c4
JB		 43static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
44 struct sk_buff *skb, int group_addr,
03f93c3d 45 int next_frag_len)
e2ebc74d 46{
2400dfe2 47 int rate, mrate, erp, dur, i;
2e92e6f2 48 struct ieee80211_rate *txrate;
e2ebc74d 49 struct ieee80211_local *local = tx->local;
8318d78a 50 struct ieee80211_supported_band *sband;
358c8d9d 51 struct ieee80211_hdr *hdr;
252b86c4 52 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2103dec1 53
95cd470c
FF		 54 /* assume HW handles this */
55 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
56 return 0;
57
e6a9854b 58 /* uh huh? */
0d528d85 59 if (WARN_ON_ONCE(tx->rate.idx < 0))
e6a9854b 60 return 0;
e2ebc74d 61
2d56577b 62 sband = local->hw.wiphy->bands[info->band];
0d528d85 63 txrate = &sband->bitrates[tx->rate.idx];
8318d78a 64
e6a9854b 65 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d 66
89b8c02a
TP		 67 /* device is expected to do this */
68 if (sband->band == NL80211_BAND_S1GHZ)
69 return 0;
70
e2ebc74d
JB		 71 /*
72 * data and mgmt (except PS Poll):
73 * - during CFP: 32768
74 * - during contention period:
75 * if addr1 is group address: 0
76 * if more fragments = 0 and addr1 is individual address: time to
77 * transmit one ACK plus SIFS
78 * if more fragments = 1 and addr1 is individual address: time to
79 * transmit next fragment plus 2 x ACK plus 3 x SIFS
80 *
81 * IEEE 802.11, 9.6:
82 * - control response frame (CTS or ACK) shall be transmitted using the
83 * same rate as the immediately previous frame in the frame exchange
84 * sequence, if this rate belongs to the PHY mandatory rates, or else
85 * at the highest possible rate belonging to the PHY rates in the
86 * BSSBasicRateSet
87 */
252b86c4 88 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 89 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 90 /* TODO: These control frames are not currently sent by
ccd7b362 91 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 92 * needs to be updated to support duration field calculation.
93 *
94 * RTS: time needed to transmit pending data/mgmt frame plus
95 * one CTS frame plus one ACK frame plus 3 x SIFS
96 * CTS: duration of immediately previous RTS minus time
97 * required to transmit CTS and its SIFS
98 * ACK: 0 if immediately previous directed data/mgmt had
99 * more=0, with more=1 duration in ACK frame is duration
100 * from previous frame minus time needed to transmit ACK
101 * and its SIFS
102 * PS Poll: BIT(15) | BIT(14) | aid
103 */
104 return 0;
105 }
106
107 /* data/mgmt */
108 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 109 return cpu_to_le16(32768);
e2ebc74d
JB		 110
111 if (group_addr) /* Group address as the destination - no ACK */
112 return 0;
113
114 /* Individual destination address:
115 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
116 * CTS and ACK frames shall be transmitted using the highest rate in
117 * basic rate set that is less than or equal to the rate of the
118 * immediately previous frame and that is using the same modulation
119 * (CCK or OFDM). If no basic rate set matches with these requirements,
120 * the highest mandatory rate of the PHY that is less than or equal to
121 * the rate of the previous frame is used.
122 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
123 */
124 rate = -1;
8318d78a
JB		 125 /* use lowest available if everything fails */
126 mrate = sband->bitrates[0].bitrate;
127 for (i = 0; i < sband->n_bitrates; i++) {
128 struct ieee80211_rate *r = &sband->bitrates[i];
61f02611 129 u32 flag;
e2ebc74d 130
8318d78a
JB		 131 if (r->bitrate > txrate->bitrate)
132 break;
e2ebc74d 133
bda3933a 134 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
2400dfe2 135 rate = r->bitrate;
8318d78a
JB		 136
137 switch (sband->band) {
63fa0426 138 case NL80211_BAND_2GHZ:
61f02611 139 case NL80211_BAND_LC:
39eac2de 140 if (tx->sdata->deflink.operating_11g_mode)
8318d78a
JB		 141 flag = IEEE80211_RATE_MANDATORY_G;
142 else
143 flag = IEEE80211_RATE_MANDATORY_B;
8318d78a 144 break;
57fbcce3 145 case NL80211_BAND_5GHZ:
c5b9a7f8 146 case NL80211_BAND_6GHZ:
61f02611 147 flag = IEEE80211_RATE_MANDATORY_A;
8318d78a 148 break;
61f02611
JB		 149 default:
150 flag = 0;
8318d78a
JB		 151 WARN_ON(1);
152 break;
153 }
61f02611
JB		 154
155 if (r->flags & flag)
156 mrate = r->bitrate;
e2ebc74d
JB		 157 }
158 if (rate == -1) {
159 /* No matching basic rate found; use highest suitable mandatory
160 * PHY rate */
2400dfe2 161 rate = mrate;
e2ebc74d
JB		 162 }
163
6674f210
SW		 164 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
165 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 166 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 167 dur = 0;
168 else
169 /* Time needed to transmit ACK
170 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
171 * to closest integer */
4ee73f33 172 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
2400dfe2 173 tx->sdata->vif.bss_conf.use_short_preamble);
e2ebc74d
JB		 174
175 if (next_frag_len) {
176 /* Frame is fragmented: duration increases with time needed to
177 * transmit next fragment plus ACK and 2 x SIFS. */
178 dur *= 2; /* ACK + SIFS */
179 /* next fragment */
4ee73f33 180 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 181 txrate->bitrate, erp,
2400dfe2 182 tx->sdata->vif.bss_conf.use_short_preamble);
e2ebc74d
JB		 183 }
184
03f93c3d 185 return cpu_to_le16(dur);
e2ebc74d
JB		 186}
187
e2ebc74d 188/* tx handlers */
5c1b98a5
KV		 189static ieee80211_tx_result debug_noinline
190ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
191{
192 struct ieee80211_local *local = tx->local;
0c74211d 193 struct ieee80211_if_managed *ifmgd;
94a5b3ac 194 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
5c1b98a5
KV		 195
196 /* driver doesn't support power save */
30686bf7 197 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
5c1b98a5
KV		 198 return TX_CONTINUE;
199
200 /* hardware does dynamic power save */
30686bf7 201 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
5c1b98a5
KV		 202 return TX_CONTINUE;
203
204 /* dynamic power save disabled */
205 if (local->hw.conf.dynamic_ps_timeout <= 0)
206 return TX_CONTINUE;
207
208 /* we are scanning, don't enable power save */
209 if (local->scanning)
210 return TX_CONTINUE;
211
212 if (!local->ps_sdata)
213 return TX_CONTINUE;
214
215 /* No point if we're going to suspend */
216 if (local->quiescing)
217 return TX_CONTINUE;
218
0c74211d
KV		 219 /* dynamic ps is supported only in managed mode */
220 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
221 return TX_CONTINUE;
222
94a5b3ac
AO		 223 if (unlikely(info->flags & IEEE80211_TX_INTFL_OFFCHAN_TX_OK))
224 return TX_CONTINUE;
225
0c74211d
KV		 226 ifmgd = &tx->sdata->u.mgd;
227
228 /*
229 * Don't wakeup from power save if u-apsd is enabled, voip ac has
230 * u-apsd enabled and the frame is in voip class. This effectively
231 * means that even if all access categories have u-apsd enabled, in
232 * practise u-apsd is only used with the voip ac. This is a
233 * workaround for the case when received voip class packets do not
234 * have correct qos tag for some reason, due the network or the
235 * peer application.
236 *
dc41e4d4 237 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 238 * changed via debugfs, user needs to reassociate manually to have
239 * everything in sync.
240 */
4875d30d
JB		 241 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
242 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
243 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 244 return TX_CONTINUE;
245
5c1b98a5
KV		 246 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
247 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 248 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 249 IEEE80211_QUEUE_STOP_REASON_PS,
250 false);
db28569a 251 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
9fa659f9
JB		 252 wiphy_work_queue(local->hw.wiphy,
253 &local->dynamic_ps_disable_work);
5c1b98a5
KV		 254 }
255
5db1c07c
LC		 256 /* Don't restart the timer if we're not disassociated */
257 if (!ifmgd->associated)
258 return TX_CONTINUE;
259
5c1b98a5
KV		 260 mod_timer(&local->dynamic_ps_timer, jiffies +
261 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
262
263 return TX_CONTINUE;
264}
e2ebc74d 265
d9e8a70f 266static ieee80211_tx_result debug_noinline
5cf121c3 267ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 268{
358c8d9d 269
e039fa4a 270 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 271 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 272 bool assoc = false;
e2ebc74d 273
e039fa4a 274 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 275 return TX_CONTINUE;
58d4185e 276
b23b025f
BG		 277 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
278 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff 279 !ieee80211_is_probe_req(hdr->frame_control) &&
30b2f0be 280 !ieee80211_is_any_nullfunc(hdr->frame_control))
a9a6ffff
KV		 281 /*
282 * When software scanning only nullfunc frames (to notify
283 * the sleep state to the AP) and probe requests (for the
284 * active scan) are allowed, all other frames should not be
285 * sent and we should not get here, but if we do
286 * nonetheless, drop them to avoid sending them
287 * off-channel. See the link below and
288 * ieee80211_start_scan() for more.
289 *
290 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
291 */
9ae54c84 292 return TX_DROP;
e2ebc74d 293
239281f8
RL		 294 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
295 return TX_CONTINUE;
296
5cf121c3 297 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 298 return TX_CONTINUE;
e2ebc74d 299
c2c98fde
JB		 300 if (tx->sta)
301 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 302
5cf121c3 303 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 304 if (unlikely(!assoc &&
358c8d9d 305 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 306#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 307 sdata_info(tx->sdata,
308 "dropped data frame to not associated station %pM\n",
309 hdr->addr1);
310#endif
e2ebc74d 311 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 312 return TX_DROP;
e2ebc74d 313 }
72f15d53
MB		 314 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
315 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
29623892
JB		 316 /*
317 * No associated STAs - no need to send multicast
318 * frames.
319 */
320 return TX_DROP;
e2ebc74d
JB		 321 }
322
9ae54c84 323 return TX_CONTINUE;
e2ebc74d
JB		 324}
325
e2ebc74d
JB		 326/* This function is called whenever the AP is about to exceed the maximum limit
327 * of buffered frames for power saving STAs. This situation should not really
328 * happen often during normal operation, so dropping the oldest buffered packet
329 * from each queue should be OK to make some room for new frames. */
330static void purge_old_ps_buffers(struct ieee80211_local *local)
331{
332 int total = 0, purged = 0;
333 struct sk_buff *skb;
334 struct ieee80211_sub_if_data *sdata;
335 struct sta_info *sta;
336
79010420 337 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 338 struct ps_data *ps;
339
340 if (sdata->vif.type == NL80211_IFTYPE_AP)
341 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 342 else if (ieee80211_vif_is_mesh(&sdata->vif))
343 ps = &sdata->u.mesh.ps;
d012a605 344 else
e2ebc74d 345 continue;
d012a605
MP		 346
347 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 348 if (skb) {
349 purged++;
6b07d9ca 350 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 351 }
d012a605 352 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 353 }
e2ebc74d 354
948d887d
JB		 355 /*
356 * Drop one frame from each station from the lowest-priority
357 * AC that has frames at all.
358 */
d0709a65 359 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 360 int ac;
361
362 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
363 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
364 total += skb_queue_len(&sta->ps_tx_buf[ac]);
365 if (skb) {
366 purged++;
c3e7724b 367 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 368 break;
369 }
e2ebc74d 370 }
e2ebc74d 371 }
d0709a65 372
e2ebc74d 373 local->total_ps_buffered = total;
bdcbd8e0 374 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 375}
376
9ae54c84 377static ieee80211_tx_result
5cf121c3 378ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 379{
e039fa4a 380 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 381 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 382 struct ps_data *ps;
e039fa4a 383
7d54d0dd
JB		 384 /*
385 * broadcast/multicast frame
386 *
3f52b7e3 387 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 388 * the frame is buffered to be sent after DTIM beacon frame.
389 * This is done either by the hardware or us.
390 */
391
3f52b7e3 392 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 393 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
394 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
395 if (!tx->sdata->bss)
396 return TX_CONTINUE;
397
398 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 399 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
400 ps = &tx->sdata->u.mesh.ps;
d012a605 401 } else {
3e122be0 402 return TX_CONTINUE;
d012a605
MP		 403 }
404
3e122be0
JB		 405
406 /* no buffering for ordered frames */
358c8d9d 407 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 408 return TX_CONTINUE;
7d54d0dd 409
08b99399
JB		 410 if (ieee80211_is_probe_req(hdr->frame_control))
411 return TX_CONTINUE;
412
30686bf7 413 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 414 info->hw_queue = tx->sdata->vif.cab_queue;
415
9ec1190d
FF		 416 /* no stations in PS mode and no buffered packets */
417 if (!atomic_read(&ps->num_sta_ps) && skb_queue_empty(&ps->bc_buf))
9ae54c84 418 return TX_CONTINUE;
7d54d0dd 419
62b517cb 420 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 421
62b517cb 422 /* device releases frame after DTIM beacon */
30686bf7 423 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 424 return TX_CONTINUE;
62b1208e 425
7d54d0dd 426 /* buffered in mac80211 */
62b1208e
JB		 427 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
428 purge_old_ps_buffers(tx->local);
429
d012a605 430 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 431 ps_dbg(tx->sdata,
432 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 433 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 434 } else
435 tx->local->total_ps_buffered++;
e2ebc74d 436
d012a605 437 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 438
62b1208e 439 return TX_QUEUED;
e2ebc74d
JB		 440}
441
fb733336
JM		 442static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
443 struct sk_buff *skb)
444{
445 if (!ieee80211_is_mgmt(fc))
446 return 0;
447
c2c98fde 448 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 449 return 0;
450
d8ca16db 451 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 452 return 0;
453
454 return 1;
455}
456
9ae54c84 457static ieee80211_tx_result
5cf121c3 458ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 459{
460 struct sta_info *sta = tx->sta;
e039fa4a 461 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 462 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 463 struct ieee80211_local *local = tx->local;
e2ebc74d 464
02f2f1a9 465 if (unlikely(!sta))
9ae54c84 466 return TX_CONTINUE;
e2ebc74d 467
c2c98fde 468 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 469 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
470 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 471 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 472 int ac = skb_get_queue_mapping(tx->skb);
473
08b99399 474 if (ieee80211_is_mgmt(hdr->frame_control) &&
2c9abe65 475 !ieee80211_is_bufferable_mmpdu(tx->skb)) {
08b99399
JB		 476 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
477 return TX_CONTINUE;
478 }
479
bdcbd8e0
JB		 480 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
481 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 482 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
483 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 484
485 /* sync with ieee80211_sta_ps_deliver_wakeup */
486 spin_lock(&sta->ps_lock);
487 /*
488 * STA woke up the meantime and all the frames on ps_tx_buf have
489 * been queued to pending queue. No reordering can happen, go
490 * ahead and Tx the packet.
491 */
492 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
5ac2e350
JB		 493 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
494 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 495 spin_unlock(&sta->ps_lock);
496 return TX_CONTINUE;
497 }
498
948d887d
JB		 499 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
500 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 501 ps_dbg(tx->sdata,
502 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
503 sta->sta.addr, ac);
c3e7724b 504 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 505 } else
506 tx->local->total_ps_buffered++;
004c872e 507
e039fa4a 508 info->control.jiffies = jiffies;
5061b0c2 509 info->control.vif = &tx->sdata->vif;
cc20ff2c 510 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
03c8c06f 511 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 512 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 513 spin_unlock(&sta->ps_lock);
3393a608
JO		 514
515 if (!timer_pending(&local->sta_cleanup))
516 mod_timer(&local->sta_cleanup,
517 round_jiffies(jiffies +
518 STA_INFO_CLEANUP_INTERVAL));
519
c868cb35
JB		 520 /*
521 * We queued up some frames, so the TIM bit might
522 * need to be set, recalculate it.
523 */
524 sta_info_recalc_tim(sta);
525
9ae54c84 526 return TX_QUEUED;
bdcbd8e0
JB		 527 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
528 ps_dbg(tx->sdata,
529 "STA %pM in PS mode, but polling/in SP -> send frame\n",
530 sta->sta.addr);
e2ebc74d 531 }
e2ebc74d 532
9ae54c84 533 return TX_CONTINUE;
e2ebc74d
JB		 534}
535
d9e8a70f 536static ieee80211_tx_result debug_noinline
5cf121c3 537ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 538{
5cf121c3 539 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 540 return TX_CONTINUE;
e2ebc74d 541
5cf121c3 542 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 543 return ieee80211_tx_h_unicast_ps_buf(tx);
544 else
545 return ieee80211_tx_h_multicast_ps_buf(tx);
546}
547
a621fa4d
JB		 548static ieee80211_tx_result debug_noinline
549ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
550{
551 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
552
af61a165
JB		 553 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
554 if (tx->sdata->control_port_no_encrypt)
555 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
556 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
9c1c98a3 557 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 558 }
a621fa4d
JB		 559
560 return TX_CONTINUE;
561}
562
ccdde7c7
JB		 563static struct ieee80211_key *
564ieee80211_select_link_key(struct ieee80211_tx_data *tx)
565{
566 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
567 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
ccdde7c7
JB		 568 struct ieee80211_link_data *link;
569 unsigned int link_id;
570
ccdde7c7
JB		 571 link_id = u32_get_bits(info->control.flags, IEEE80211_TX_CTRL_MLO_LINK);
572 if (link_id == IEEE80211_LINK_UNSPECIFIED) {
573 link = &tx->sdata->deflink;
574 } else {
575 link = rcu_dereference(tx->sdata->link[link_id]);
576 if (!link)
577 return NULL;
578 }
579
1d10575b
MS		 580 if (ieee80211_is_group_privacy_action(tx->skb))
581 return rcu_dereference(link->default_multicast_key);
582 else if (ieee80211_is_mgmt(hdr->frame_control) &&
583 is_multicast_ether_addr(hdr->addr1) &&
584 ieee80211_is_robust_mgmt_frame(tx->skb))
ccdde7c7 585 return rcu_dereference(link->default_mgmt_key);
1d10575b 586 else if (is_multicast_ether_addr(hdr->addr1))
ccdde7c7 587 return rcu_dereference(link->default_multicast_key);
ccdde7c7
JB		 588
589 return NULL;
590}
591
d9e8a70f 592static ieee80211_tx_result debug_noinline
5cf121c3 593ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 594{
46e6de15 595 struct ieee80211_key *key;
e039fa4a 596 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 597 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 598
a0761a30 599 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) {
e2ebc74d 600 tx->key = NULL;
a0761a30
JB		 601 return TX_CONTINUE;
602 }
603
604 if (tx->sta &&
605 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 606 tx->key = key;
ccdde7c7 607 else if ((key = ieee80211_select_link_key(tx)))
f7e0104c
JB		 608 tx->key = key;
609 else if (!is_multicast_ether_addr(hdr->addr1) &&
610 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 611 tx->key = key;
e8f4fb7c 612 else
4922f71f 613 tx->key = NULL;
e2ebc74d
JB		 614
615 if (tx->key) {
813d7669
JB		 616 bool skip_hw = false;
617
011bfcc4 618 /* TODO: add threshold stuff again */
176e4f84 619
97359d12
JB		 620 switch (tx->key->conf.cipher) {
621 case WLAN_CIPHER_SUITE_WEP40:
622 case WLAN_CIPHER_SUITE_WEP104:
97359d12 623 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 624 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 625 tx->key = NULL;
626 break;
97359d12 627 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 628 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 629 case WLAN_CIPHER_SUITE_GCMP:
630 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 631 if (!ieee80211_is_data_present(hdr->frame_control) &&
632 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 633 tx->skb) &&
634 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 635 tx->key = NULL;
3b43a187
KV		 636 else
637 skip_hw = (tx->key->conf.flags &
e548c49e 638 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 639 ieee80211_is_mgmt(hdr->frame_control);
fb733336 640 break;
97359d12 641 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 642 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 643 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
644 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 645 if (!ieee80211_is_mgmt(hdr->frame_control))
646 tx->key = NULL;
647 break;
176e4f84 648 }
813d7669 649
e54faf29 650 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
61304336
WG		 651 !ieee80211_is_deauth(hdr->frame_control)) &&
652 tx->skb->protocol != tx->sdata->control_port_protocol)
95acac61
JB		 653 return TX_DROP;
654
f12553eb 655 if (!skip_hw && tx->key &&
382b1655 656 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 657 info->control.hw_key = &tx->key->conf;
2463ec86 658 } else if (ieee80211_is_data_present(hdr->frame_control) && tx->sta &&
a0761a30
JB		 659 test_sta_flag(tx->sta, WLAN_STA_USES_ENCRYPTION)) {
660 return TX_DROP;
e2ebc74d
JB		 661 }
662
9ae54c84 663 return TX_CONTINUE;
e2ebc74d
JB		 664}
665
d9e8a70f 666static ieee80211_tx_result debug_noinline
5cf121c3 667ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 668{
e039fa4a 669 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 670 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
671 struct ieee80211_supported_band *sband;
a2c40249 672 u32 len;
e6a9854b 673 struct ieee80211_tx_rate_control txrc;
0d528d85 674 struct ieee80211_sta_rates *ratetbl = NULL;
3187ba0c 675 bool encap = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
c2c98fde 676 bool assoc = false;
8318d78a 677
e6a9854b 678 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 679
2d56577b 680 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 681
a2c40249 682 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 683 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 684
685 /* set up the tx rate control struct we give the RC algo */
005e472b 686 txrc.hw = &tx->local->hw;
e6a9854b
JB		 687 txrc.sband = sband;
688 txrc.bss_conf = &tx->sdata->vif.bss_conf;
689 txrc.skb = tx->skb;
690 txrc.reported_rate.idx = -1;
2ffbe6d3 691
e7a7ef9a 692 if (unlikely(info->control.flags & IEEE80211_TX_CTRL_DONT_USE_RATE_MASK)) {
ab9177d8
JB		 693 txrc.rate_idx_mask = ~0;
694 } else {
695 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
696
697 if (tx->sdata->rc_has_mcs_mask[info->band])
698 txrc.rate_idx_mcs_mask =
699 tx->sdata->rc_rateidx_mcs_mask[info->band];
700 }
2ffbe6d3 701
8f0729b1 702 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 703 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 704 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
705 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 706
707 /* set up RTS protection if desired */
b9a5f8ca 708 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 709 txrc.rts = true;
e2ebc74d 710 }
e2ebc74d 711
0d528d85 712 info->control.use_rts = txrc.rts;
991fec09
FF		 713 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
714
e6a9854b
JB		 715 /*
716 * Use short preamble if the BSS can handle it, but not for
717 * management frames unless we know the receiver can handle
718 * that -- the management frame might be to a station that
719 * just wants a probe response.
720 */
721 if (tx->sdata->vif.bss_conf.use_short_preamble &&
3187ba0c 722 (ieee80211_is_tx_data(tx->skb) ||
c2c98fde 723 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 724 txrc.short_preamble = true;
725
726 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 727
dfdfc2be
SE		 728 /* don't ask rate control when rate already injected via radiotap */
729 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
730 return TX_CONTINUE;
731
c2c98fde
JB		 732 if (tx->sta)
733 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 734
735 /*
736 * Lets not bother rate control if we're associated and cannot
737 * talk to the sta. This should not happen.
738 */
c2c98fde 739 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 740 !rate_usable_index_exists(sband, &tx->sta->sta),
741 "%s: Dropped data frame as no usable bitrate found while "
742 "scanning and associated. Target station: "
743 "%pM on %d GHz band\n",
3187ba0c
RL		 744 tx->sdata->name,
745 encap ? ((struct ethhdr *)hdr)->h_dest : hdr->addr1,
2d56577b 746 info->band ? 5 : 2))
b770b43e 747 return TX_DROP;
2e92e6f2 748
b770b43e
LR		 749 /*
750 * If we're associated with the sta at this point we know we can at
751 * least send the frame at the lowest bit rate.
752 */
e6a9854b
JB		 753 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
754
0d528d85
FF		 755 if (tx->sta && !info->control.skip_table)
756 ratetbl = rcu_dereference(tx->sta->sta.rates);
757
758 if (unlikely(info->control.rates[0].idx < 0)) {
759 if (ratetbl) {
760 struct ieee80211_tx_rate rate = {
761 .idx = ratetbl->rate[0].idx,
762 .flags = ratetbl->rate[0].flags,
763 .count = ratetbl->rate[0].count
764 };
765
766 if (ratetbl->rate[0].idx < 0)
767 return TX_DROP;
768
769 tx->rate = rate;
770 } else {
771 return TX_DROP;
772 }
773 } else {
774 tx->rate = info->control.rates[0];
775 }
e6a9854b 776
c1ce5a74 777 if (txrc.reported_rate.idx < 0) {
0d528d85 778 txrc.reported_rate = tx->rate;
3187ba0c 779 if (tx->sta && ieee80211_is_tx_data(tx->skb))
046d2e7c 780 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 781 } else if (tx->sta)
046d2e7c 782 tx->sta->deflink.tx_stats.last_rate = txrc.reported_rate;
e039fa4a 783
0d528d85
FF		 784 if (ratetbl)
785 return TX_CONTINUE;
786
e6a9854b
JB		 787 if (unlikely(!info->control.rates[0].count))
788 info->control.rates[0].count = 1;
e2ebc74d 789
9955151d
GS		 790 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
791 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
792 info->control.rates[0].count = 1;
793
e6a9854b
JB		 794 return TX_CONTINUE;
795}
796
ba8c3d6f
FF		 797static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
798{
799 u16 *seq = &sta->tid_seq[tid];
800 __le16 ret = cpu_to_le16(*seq);
801
802 /* Increase the sequence number. */
803 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
804
805 return ret;
806}
807
f591fa5d
JB		 808static ieee80211_tx_result debug_noinline
809ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
810{
811 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
812 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 813 int tid;
814
25d834e1
JB		 815 /*
816 * Packet injection may want to control the sequence
817 * number, if we have no matching interface then we
818 * neither assign one ourselves nor ask the driver to.
819 */
5061b0c2 820 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 821 return TX_CONTINUE;
822
f591fa5d
JB		 823 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
824 return TX_CONTINUE;
825
826 if (ieee80211_hdrlen(hdr->frame_control) < 24)
827 return TX_CONTINUE;
828
49a59543
JB		 829 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
830 return TX_CONTINUE;
831
29c3e95f
MV		 832 if (info->control.flags & IEEE80211_TX_CTRL_NO_SEQNO)
833 return TX_CONTINUE;
834
963d0e8d
JB		 835 /* SNS11 from 802.11be 10.3.2.14 */
836 if (unlikely(is_multicast_ether_addr(hdr->addr1) &&
f1871abd 837 ieee80211_vif_is_mld(info->control.vif) &&
963d0e8d
JB		 838 info->control.vif->type == NL80211_IFTYPE_AP)) {
839 if (info->control.flags & IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX)
840 tx->sdata->mld_mcast_seq += 0x10;
841 hdr->seq_ctrl = cpu_to_le16(tx->sdata->mld_mcast_seq);
842 return TX_CONTINUE;
843 }
844
94778280
JB		 845 /*
846 * Anything but QoS data that has a sequence number field
847 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 848 * counter. QoS data frames with a multicast destination
849 * also use the global counter (802.11-2012 9.3.2.10).
94778280 850 */
c4c205f3
BC		 851 if (!ieee80211_is_data_qos(hdr->frame_control) ||
852 is_multicast_ether_addr(hdr->addr1)) {
94778280 853 /* driver should assign sequence number */
f591fa5d 854 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 855 /* for pure STA mode without beacons, we can do it */
856 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
857 tx->sdata->sequence_number += 0x10;
79c892b8 858 if (tx->sta)
046d2e7c 859 tx->sta->deflink.tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 860 return TX_CONTINUE;
861 }
862
863 /*
864 * This should be true for injected/management frames only, for
865 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
866 * above since they are not QoS-data frames.
867 */
868 if (!tx->sta)
869 return TX_CONTINUE;
870
871 /* include per-STA, per-TID sequence counter */
a1f2ba04 872 tid = ieee80211_get_tid(hdr);
046d2e7c 873 tx->sta->deflink.tx_stats.msdu[tid]++;
f591fa5d 874
bb42f2d1 875 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 876
877 return TX_CONTINUE;
878}
879
252b86c4 880static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 881 struct sk_buff *skb, int hdrlen,
882 int frag_threshold)
883{
252b86c4 884 struct ieee80211_local *local = tx->local;
a1a3fcec 885 struct ieee80211_tx_info *info;
252b86c4 886 struct sk_buff *tmp;
2de8e0d9
JB		 887 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
888 int pos = hdrlen + per_fragm;
889 int rem = skb->len - hdrlen - per_fragm;
890
891 if (WARN_ON(rem < 0))
892 return -EINVAL;
893
252b86c4
JB		 894 /* first fragment was already added to queue by caller */
895
2de8e0d9
JB		 896 while (rem) {
897 int fraglen = per_fragm;
898
899 if (fraglen > rem)
900 fraglen = rem;
901 rem -= fraglen;
902 tmp = dev_alloc_skb(local->tx_headroom +
903 frag_threshold +
23a5f0af 904 IEEE80211_ENCRYPT_HEADROOM +
2de8e0d9
JB		 905 IEEE80211_ENCRYPT_TAILROOM);
906 if (!tmp)
907 return -ENOMEM;
252b86c4
JB		 908
909 __skb_queue_tail(&tx->skbs, tmp);
910
2475b1cc 911 skb_reserve(tmp,
23a5f0af 912 local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM);
2475b1cc 913
2de8e0d9
JB		 914 /* copy control information */
915 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 916
917 info = IEEE80211_SKB_CB(tmp);
918 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
919 IEEE80211_TX_CTL_FIRST_FRAGMENT);
920
921 if (rem)
922 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
923
2de8e0d9
JB		 924 skb_copy_queue_mapping(tmp, skb);
925 tmp->priority = skb->priority;
2de8e0d9 926 tmp->dev = skb->dev;
2de8e0d9
JB		 927
928 /* copy header and data */
59ae1d12
JB		 929 skb_put_data(tmp, skb->data, hdrlen);
930 skb_put_data(tmp, skb->data + pos, fraglen);
2de8e0d9
JB		 931
932 pos += fraglen;
933 }
934
252b86c4 935 /* adjust first fragment's length */
338f977f 936 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 937 return 0;
938}
939
d9e8a70f 940static ieee80211_tx_result debug_noinline
e2454948
JB		 941ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
942{
2de8e0d9
JB		 943 struct sk_buff *skb = tx->skb;
944 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
945 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 946 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 947 int hdrlen;
948 int fragnum;
e2454948 949
252b86c4
JB		 950 /* no matter what happens, tx->skb moves to tx->skbs */
951 __skb_queue_tail(&tx->skbs, skb);
952 tx->skb = NULL;
953
a26eb27a
JB		 954 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
955 return TX_CONTINUE;
956
f3fe4e93 957 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
e2454948
JB		 958 return TX_CONTINUE;
959
eefce91a
JB		 960 /*
961 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 962 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 963 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 964 */
8b30b1fe 965 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 966 return TX_DROP;
967
065e9605 968 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 969
a26eb27a 970 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 971 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 972 return TX_DROP;
e6a9854b 973
2de8e0d9
JB		 974 /*
975 * Now fragment the frame. This will allocate all the fragments and
976 * chain them (using skb as the first fragment) to skb->next.
977 * During transmission, we will remove the successfully transmitted
978 * fragments from this list. When the low-level driver rejects one
979 * of the fragments then we will simply pretend to accept the skb
980 * but store it away as pending.
981 */
252b86c4 982 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 983 return TX_DROP;
e6a9854b 984
2de8e0d9
JB		 985 /* update duration/seq/flags of fragments */
986 fragnum = 0;
252b86c4
JB		 987
988 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 989 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 990
2de8e0d9
JB		 991 hdr = (void *)skb->data;
992 info = IEEE80211_SKB_CB(skb);
e6a9854b 993
252b86c4 994 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 995 hdr->frame_control |= morefrags;
e6a9854b
JB		 996 /*
997 * No multi-rate retries for fragmented frames, that
998 * would completely throw off the NAV at other STAs.
999 */
1000 info->control.rates[1].idx = -1;
1001 info->control.rates[2].idx = -1;
1002 info->control.rates[3].idx = -1;
e3e1a0bc 1003 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 1004 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 1005 } else {
1006 hdr->frame_control &= ~morefrags;
e6a9854b 1007 }
2de8e0d9
JB		 1008 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
1009 fragnum++;
252b86c4 1010 }
e2ebc74d 1011
9ae54c84 1012 return TX_CONTINUE;
e2ebc74d
JB		 1013}
1014
feff1f2f
JB		 1015static ieee80211_tx_result debug_noinline
1016ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
1017{
252b86c4 1018 struct sk_buff *skb;
560d2682 1019 int ac = -1;
feff1f2f
JB		 1020
1021 if (!tx->sta)
1022 return TX_CONTINUE;
1023
252b86c4 1024 skb_queue_walk(&tx->skbs, skb) {
560d2682 1025 ac = skb_get_queue_mapping(skb);
046d2e7c 1026 tx->sta->deflink.tx_stats.bytes[ac] += skb->len;
252b86c4 1027 }
560d2682 1028 if (ac >= 0)
046d2e7c 1029 tx->sta->deflink.tx_stats.packets[ac]++;
feff1f2f
JB		 1030
1031 return TX_CONTINUE;
1032}
1033
d9e8a70f 1034static ieee80211_tx_result debug_noinline
e2454948
JB		 1035ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1036{
1037 if (!tx->key)
1038 return TX_CONTINUE;
1039
97359d12
JB		 1040 switch (tx->key->conf.cipher) {
1041 case WLAN_CIPHER_SUITE_WEP40:
1042 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1043 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1044 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1045 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1046 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1047 return ieee80211_crypto_ccmp_encrypt(
1048 tx, IEEE80211_CCMP_MIC_LEN);
1049 case WLAN_CIPHER_SUITE_CCMP_256:
1050 return ieee80211_crypto_ccmp_encrypt(
1051 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1052 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1053 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1054 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1055 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1056 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1057 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1058 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1059 case WLAN_CIPHER_SUITE_GCMP:
1060 case WLAN_CIPHER_SUITE_GCMP_256:
1061 return ieee80211_crypto_gcmp_encrypt(tx);
e2454948
JB		 1062 }
1063
e2454948
JB		 1064 return TX_DROP;
1065}
1066
d9e8a70f 1067static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1068ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1069{
252b86c4 1070 struct sk_buff *skb;
2de8e0d9
JB		 1071 struct ieee80211_hdr *hdr;
1072 int next_len;
1073 bool group_addr;
03f93c3d 1074
252b86c4 1075 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1076 hdr = (void *) skb->data;
7e0aae47
JM		 1077 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1078 break; /* must not overwrite AID */
252b86c4
JB		 1079 if (!skb_queue_is_last(&tx->skbs, skb)) {
1080 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1081 next_len = next->len;
1082 } else
1083 next_len = 0;
2de8e0d9 1084 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1085
2de8e0d9 1086 hdr->duration_id =
252b86c4
JB		 1087 ieee80211_duration(tx, skb, group_addr, next_len);
1088 }
03f93c3d
JB		 1089
1090 return TX_CONTINUE;
1091}
1092
e2ebc74d
JB		 1093/* actual transmit path */
1094
a622ab72
JB		 1095static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1096 struct sk_buff *skb,
1097 struct ieee80211_tx_info *info,
1098 struct tid_ampdu_tx *tid_tx,
1099 int tid)
1100{
1101 bool queued = false;
285fa695 1102 bool reset_agg_timer = false;
aa454580 1103 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1104
1105 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
285fa695 1106 reset_agg_timer = true;
0ab33703
JB		 1107 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1108 /*
1109 * nothing -- this aggregation session is being started
1110 * but that might still fail with the driver
1111 */
ba8c3d6f 1112 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1113 spin_lock(&tx->sta->lock);
1114 /*
1115 * Need to re-check now, because we may get here
1116 *
1117 * 1) in the window during which the setup is actually
1118 * already done, but not marked yet because not all
1119 * packets are spliced over to the driver pending
1120 * queue yet -- if this happened we acquire the lock
1121 * either before or after the splice happens, but
1122 * need to recheck which of these cases happened.
1123 *
1124 * 2) during session teardown, if the OPERATIONAL bit
1125 * was cleared due to the teardown but the pointer
1126 * hasn't been assigned NULL yet (or we loaded it
1127 * before it was assigned) -- in this case it may
1128 * now be NULL which means we should just let the
1129 * packet pass through because splicing the frames
1130 * back is already done.
1131 */
40b275b6 1132 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1133
1134 if (!tid_tx) {
1135 /* do nothing, let packet pass through */
1136 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
285fa695 1137 reset_agg_timer = true;
a622ab72
JB		 1138 } else {
1139 queued = true;
f6d4671a
EG		 1140 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1141 clear_sta_flag(tx->sta, WLAN_STA_SP);
1142 ps_dbg(tx->sta->sdata,
1143 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1144 tx->sta->sta.addr, tx->sta->sta.aid);
1145 }
a622ab72 1146 info->control.vif = &tx->sdata->vif;
cc20ff2c 1147 info->control.flags |= IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
facde7f3 1148 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1149 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1150 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1151 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1152 }
1153 spin_unlock(&tx->sta->lock);
aa454580
HS		 1154
1155 if (purge_skb)
c3e7724b 1156 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1157 }
1158
285fa695 1159 /* reset session timer */
914eac24 1160 if (reset_agg_timer)
12d3952f 1161 tid_tx->last_tx = jiffies;
285fa695 1162
a622ab72
JB		 1163 return queued;
1164}
1165
8b0f5cb6
FF		 1166void ieee80211_aggr_check(struct ieee80211_sub_if_data *sdata,
1167 struct sta_info *sta, struct sk_buff *skb)
1a791550
FF		 1168{
1169 struct rate_control_ref *ref = sdata->local->rate_ctrl;
1170 u16 tid;
1171
1172 if (!ref || !(ref->ops->capa & RATE_CTRL_CAPA_AMPDU_TRIGGER))
1173 return;
1174
3979c8e6
JB		 1175 if (!sta ||
1176 (!sta->sta.valid_links && !sta->sta.deflink.ht_cap.ht_supported) ||
1a791550
FF		 1177 !sta->sta.wme || skb_get_queue_mapping(skb) == IEEE80211_AC_VO ||
1178 skb->protocol == sdata->control_port_protocol)
1179 return;
1180
1181 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1182 if (likely(sta->ampdu_mlme.tid_tx[tid]))
1183 return;
1184
1185 ieee80211_start_tx_ba_session(&sta->sta, tid, 0);
1186}
1187
58d4185e
JB		 1188/*
1189 * initialises @tx
7c10770f
JB		 1190 * pass %NULL for the station if unknown, a valid pointer if known
1191 * or an ERR_PTR() if the station is known not to exist
58d4185e 1192 */
9ae54c84 1193static ieee80211_tx_result
3b8d81e0
JB		 1194ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1195 struct ieee80211_tx_data *tx,
7c10770f 1196 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1197{
3b8d81e0 1198 struct ieee80211_local *local = sdata->local;
58d4185e 1199 struct ieee80211_hdr *hdr;
e039fa4a 1200 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1a791550 1201 bool aggr_check = false;
68f2b517 1202 int tid;
e2ebc74d
JB		 1203
1204 memset(tx, 0, sizeof(*tx));
1205 tx->skb = skb;
e2ebc74d 1206 tx->local = local;
3b8d81e0 1207 tx->sdata = sdata;
252b86c4 1208 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1209
cd8ffc80
JB		 1210 /*
1211 * If this flag is set to true anywhere, and we get here,
1212 * we are doing the needed processing, so remove the flag
1213 * now.
1214 */
cc20ff2c 1215 info->control.flags &= ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
cd8ffc80 1216
58d4185e
JB		 1217 hdr = (struct ieee80211_hdr *) skb->data;
1218
7c10770f
JB		 1219 if (likely(sta)) {
1220 if (!IS_ERR(sta))
1221 tx->sta = sta;
1222 } else {
1223 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1224 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1225 if (!tx->sta && sdata->wdev.use_4addr)
1226 return TX_DROP;
10cb8e61 1227 } else if (tx->sdata->control_port_protocol == tx->skb->protocol) {
7c10770f
JB		 1228 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1229 }
1a791550 1230 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1)) {
7c10770f 1231 tx->sta = sta_info_get(sdata, hdr->addr1);
1a791550
FF		 1232 aggr_check = true;
1233 }
3f0e0b22 1234 }
58d4185e 1235
cd8ffc80 1236 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1237 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1238 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1239 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1240 struct tid_ampdu_tx *tid_tx;
1241
a1f2ba04 1242 tid = ieee80211_get_tid(hdr);
a622ab72 1243 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1a791550
FF		 1244 if (!tid_tx && aggr_check) {
1245 ieee80211_aggr_check(sdata, tx->sta, skb);
1246 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1247 }
1248
a622ab72
JB		 1249 if (tid_tx) {
1250 bool queued;
cd8ffc80 1251
a622ab72
JB		 1252 queued = ieee80211_tx_prep_agg(tx, skb, info,
1253 tid_tx, tid);
1254
1255 if (unlikely(queued))
1256 return TX_QUEUED;
1257 }
8b30b1fe
S		 1258 }
1259
badffb72 1260 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1261 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1262 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1263 } else
5cf121c3 1264 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1265
a26eb27a
JB		 1266 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1267 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1268 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1269 info->flags & IEEE80211_TX_CTL_AMPDU)
1270 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1271 }
1272
e2ebc74d 1273 if (!tx->sta)
e039fa4a 1274 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1275 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1276 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1277 ieee80211_check_fast_xmit(tx->sta);
1278 }
58d4185e 1279
e039fa4a 1280 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1281
9ae54c84 1282 return TX_CONTINUE;
e2ebc74d
JB		 1283}
1284
80a83cfc
MK		 1285static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1286 struct ieee80211_vif *vif,
dbef5362 1287 struct sta_info *sta,
80a83cfc 1288 struct sk_buff *skb)
ba8c3d6f
FF		 1289{
1290 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1291 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1292 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1293
c3732a7b
FF		 1294 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1295 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1296 return NULL;
ba8c3d6f 1297
cc20ff2c 1298 if (!(info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) &&
50ff477a 1299 unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
adf8ed01 1300 if ((!ieee80211_is_mgmt(hdr->frame_control) ||
2c9abe65 1301 ieee80211_is_bufferable_mmpdu(skb) ||
0eeb2b67 1302 vif->type == NL80211_IFTYPE_STATION) &&
adf8ed01
JB		 1303 sta && sta->uploaded) {
1304 /*
1305 * This will be NULL if the driver didn't set the
1306 * opt-in hardware flag.
1307 */
1308 txq = sta->sta.txq[IEEE80211_NUM_TIDS];
1309 }
1310 } else if (sta) {
ba8c3d6f
FF		 1311 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1312
dbef5362
MK		 1313 if (!sta->uploaded)
1314 return NULL;
1315
1316 txq = sta->sta.txq[tid];
94450963 1317 } else {
ba8c3d6f
FF		 1318 txq = vif->txq;
1319 }
1320
1321 if (!txq)
80a83cfc 1322 return NULL;
ba8c3d6f 1323
80a83cfc
MK		 1324 return to_txq_info(txq);
1325}
ba8c3d6f 1326
5caa328e
MK		 1327static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1328{
7d360f60
FF		 1329 struct sk_buff *next;
1330 codel_time_t now = codel_get_time();
1331
1332 skb_list_walk_safe(skb, skb, next)
1333 IEEE80211_SKB_CB(skb)->control.enqueue_time = now;
5caa328e
MK		 1334}
1335
5caa328e
MK		 1336static u32 codel_skb_len_func(const struct sk_buff *skb)
1337{
1338 return skb->len;
1339}
1340
1341static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1342{
1343 const struct ieee80211_tx_info *info;
1344
1345 info = (const struct ieee80211_tx_info *)skb->cb;
1346 return info->control.enqueue_time;
1347}
1348
1349static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1350 void *ctx)
1351{
1352 struct ieee80211_local *local;
1353 struct txq_info *txqi;
1354 struct fq *fq;
1355 struct fq_flow *flow;
1356
1357 txqi = ctx;
1358 local = vif_to_sdata(txqi->txq.vif)->local;
1359 fq = &local->fq;
1360
1361 if (cvars == &txqi->def_cvars)
bf9009bf 1362 flow = &txqi->tin.default_flow;
5caa328e
MK		 1363 else
1364 flow = &fq->flows[cvars - local->cvars];
1365
1366 return fq_flow_dequeue(fq, flow);
1367}
1368
1369static void codel_drop_func(struct sk_buff *skb,
1370 void *ctx)
1371{
1372 struct ieee80211_local *local;
1373 struct ieee80211_hw *hw;
1374 struct txq_info *txqi;
1375
1376 txqi = ctx;
1377 local = vif_to_sdata(txqi->txq.vif)->local;
1378 hw = &local->hw;
1379
1380 ieee80211_free_txskb(hw, skb);
1381}
1382
fa962b92
MK		 1383static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1384 struct fq_tin *tin,
1385 struct fq_flow *flow)
1386{
5caa328e
MK		 1387 struct ieee80211_local *local;
1388 struct txq_info *txqi;
1389 struct codel_vars *cvars;
1390 struct codel_params *cparams;
1391 struct codel_stats *cstats;
1392
1393 local = container_of(fq, struct ieee80211_local, fq);
1394 txqi = container_of(tin, struct txq_info, tin);
48763769 1395 cparams = &local->cparams;
8d51dbb8 1396 cstats = &txqi->cstats;
5caa328e 1397
bf9009bf 1398 if (flow == &tin->default_flow)
5caa328e
MK		 1399 cvars = &txqi->def_cvars;
1400 else
1401 cvars = &local->cvars[flow - fq->flows];
1402
1403 return codel_dequeue(txqi,
1404 &flow->backlog,
1405 cparams,
1406 cvars,
1407 cstats,
1408 codel_skb_len_func,
1409 codel_skb_time_func,
1410 codel_drop_func,
1411 codel_dequeue_func);
fa962b92
MK		 1412}
1413
1414static void fq_skb_free_func(struct fq *fq,
1415 struct fq_tin *tin,
1416 struct fq_flow *flow,
1417 struct sk_buff *skb)
1418{
1419 struct ieee80211_local *local;
1420
1421 local = container_of(fq, struct ieee80211_local, fq);
1422 ieee80211_free_txskb(&local->hw, skb);
1423}
1424
80a83cfc
MK		 1425static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1426 struct txq_info *txqi,
1427 struct sk_buff *skb)
1428{
fa962b92
MK		 1429 struct fq *fq = &local->fq;
1430 struct fq_tin *tin = &txqi->tin;
f2af2df8 1431 u32 flow_idx = fq_flow_idx(fq, skb);
f2ac7e30 1432
5caa328e 1433 ieee80211_set_skb_enqueue_time(skb);
f2af2df8
FF		 1434
1435 spin_lock_bh(&fq->lock);
73bc9e0a
JB		 1436 /*
1437 * For management frames, don't really apply codel etc.,
1438 * we don't want to apply any shaping or anything we just
1439 * want to simplify the driver API by having them on the
1440 * txqi.
1441 */
ca47b462
JB		 1442 if (unlikely(txqi->txq.tid == IEEE80211_NUM_TIDS)) {
1443 IEEE80211_SKB_CB(skb)->control.flags |=
1444 IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
73bc9e0a 1445 __skb_queue_tail(&txqi->frags, skb);
ca47b462 1446 } else {
73bc9e0a
JB		 1447 fq_tin_enqueue(fq, tin, flow_idx, skb,
1448 fq_skb_free_func);
ca47b462 1449 }
f2af2df8 1450 spin_unlock_bh(&fq->lock);
fa962b92 1451}
ba8c3d6f 1452
2a9e2579
JB		 1453static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1454 struct fq_flow *flow, struct sk_buff *skb,
1455 void *data)
1456{
1457 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1458
1459 return info->control.vif == data;
1460}
1461
1462void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1463 struct ieee80211_sub_if_data *sdata)
1464{
1465 struct fq *fq = &local->fq;
1466 struct txq_info *txqi;
1467 struct fq_tin *tin;
1468 struct ieee80211_sub_if_data *ap;
1469
1470 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1471 return;
1472
1473 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1474
1475 if (!ap->vif.txq)
1476 return;
1477
1478 txqi = to_txq_info(ap->vif.txq);
1479 tin = &txqi->tin;
1480
1481 spin_lock_bh(&fq->lock);
1482 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1483 fq_skb_free_func);
1484 spin_unlock_bh(&fq->lock);
1485}
1486
fa962b92
MK		 1487void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1488 struct sta_info *sta,
1489 struct txq_info *txqi, int tid)
1490{
1491 fq_tin_init(&txqi->tin);
5caa328e 1492 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1493 codel_stats_init(&txqi->cstats);
bb42f2d1 1494 __skb_queue_head_init(&txqi->frags);
942741da 1495 INIT_LIST_HEAD(&txqi->schedule_order);
fa962b92
MK		 1496
1497 txqi->txq.vif = &sdata->vif;
1498
adf8ed01 1499 if (!sta) {
fa962b92
MK		 1500 sdata->vif.txq = &txqi->txq;
1501 txqi->txq.tid = 0;
1502 txqi->txq.ac = IEEE80211_AC_BE;
adf8ed01
JB		 1503
1504 return;
80a83cfc 1505 }
adf8ed01
JB		 1506
1507 if (tid == IEEE80211_NUM_TIDS) {
0eeb2b67
SS		 1508 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
1509 /* Drivers need to opt in to the management MPDU TXQ */
1510 if (!ieee80211_hw_check(&sdata->local->hw,
1511 STA_MMPDU_TXQ))
1512 return;
1513 } else if (!ieee80211_hw_check(&sdata->local->hw,
1514 BUFF_MMPDU_TXQ)) {
1515 /* Drivers need to opt in to the bufferable MMPDU TXQ */
adf8ed01 1516 return;
0eeb2b67 1517 }
adf8ed01
JB		 1518 txqi->txq.ac = IEEE80211_AC_VO;
1519 } else {
1520 txqi->txq.ac = ieee80211_ac_from_tid(tid);
1521 }
1522
1523 txqi->txq.sta = &sta->sta;
1524 txqi->txq.tid = tid;
1525 sta->sta.txq[tid] = &txqi->txq;
fa962b92 1526}
ba8c3d6f 1527
fa962b92
MK		 1528void ieee80211_txq_purge(struct ieee80211_local *local,
1529 struct txq_info *txqi)
1530{
1531 struct fq *fq = &local->fq;
1532 struct fq_tin *tin = &txqi->tin;
1533
b4809e94 1534 spin_lock_bh(&fq->lock);
fa962b92 1535 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1536 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
b4809e94
THJ		 1537 spin_unlock_bh(&fq->lock);
1538
942741da
FF		 1539 spin_lock_bh(&local->active_txq_lock[txqi->txq.ac]);
1540 list_del_init(&txqi->schedule_order);
1541 spin_unlock_bh(&local->active_txq_lock[txqi->txq.ac]);
fa962b92
MK		 1542}
1543
2fe4a29a
THJ		 1544void ieee80211_txq_set_params(struct ieee80211_local *local)
1545{
1546 if (local->hw.wiphy->txq_limit)
1547 local->fq.limit = local->hw.wiphy->txq_limit;
1548 else
1549 local->hw.wiphy->txq_limit = local->fq.limit;
1550
1551 if (local->hw.wiphy->txq_memory_limit)
1552 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1553 else
1554 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1555
1556 if (local->hw.wiphy->txq_quantum)
1557 local->fq.quantum = local->hw.wiphy->txq_quantum;
1558 else
1559 local->hw.wiphy->txq_quantum = local->fq.quantum;
1560}
1561
fa962b92
MK		 1562int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1563{
1564 struct fq *fq = &local->fq;
1565 int ret;
5caa328e 1566 int i;
3ff23cd5
THJ		 1567 bool supp_vht = false;
1568 enum nl80211_band band;
fa962b92 1569
fa962b92
MK		 1570 ret = fq_init(fq, 4096);
1571 if (ret)
1572 return ret;
1573
3ff23cd5
THJ		 1574 /*
1575 * If the hardware doesn't support VHT, it is safe to limit the maximum
1576 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1577 */
1578 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1579 struct ieee80211_supported_band *sband;
1580
1581 sband = local->hw.wiphy->bands[band];
1582 if (!sband)
1583 continue;
1584
1585 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1586 }
1587
1588 if (!supp_vht)
1589 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1590
5caa328e 1591 codel_params_init(&local->cparams);
5caa328e
MK		 1592 local->cparams.interval = MS2TIME(100);
1593 local->cparams.target = MS2TIME(20);
1594 local->cparams.ecn = true;
1595
f40db02e
JB		 1596 local->cvars = kvcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1597 GFP_KERNEL);
5caa328e 1598 if (!local->cvars) {
59a7c828 1599 spin_lock_bh(&fq->lock);
5caa328e 1600 fq_reset(fq, fq_skb_free_func);
59a7c828 1601 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1602 return -ENOMEM;
1603 }
1604
1605 for (i = 0; i < fq->flows_cnt; i++)
1606 codel_vars_init(&local->cvars[i]);
1607
2fe4a29a
THJ		 1608 ieee80211_txq_set_params(local);
1609
fa962b92
MK		 1610 return 0;
1611}
1612
1613void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1614{
1615 struct fq *fq = &local->fq;
1616
f40db02e 1617 kvfree(local->cvars);
5caa328e
MK		 1618 local->cvars = NULL;
1619
59a7c828 1620 spin_lock_bh(&fq->lock);
fa962b92 1621 fq_reset(fq, fq_skb_free_func);
59a7c828 1622 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1623}
1624
bb42f2d1
THJ		 1625static bool ieee80211_queue_skb(struct ieee80211_local *local,
1626 struct ieee80211_sub_if_data *sdata,
1627 struct sta_info *sta,
1628 struct sk_buff *skb)
1629{
bb42f2d1
THJ		 1630 struct ieee80211_vif *vif;
1631 struct txq_info *txqi;
bb42f2d1 1632
107395f9 1633 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
bb42f2d1
THJ		 1634 return false;
1635
bb42f2d1
THJ		 1636 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1637 sdata = container_of(sdata->bss,
1638 struct ieee80211_sub_if_data, u.ap);
1639
1640 vif = &sdata->vif;
dbef5362 1641 txqi = ieee80211_get_txq(local, vif, sta, skb);
bb42f2d1
THJ		 1642
1643 if (!txqi)
1644 return false;
1645
bb42f2d1 1646 ieee80211_txq_enqueue(local, txqi, skb);
bb42f2d1 1647
18667600 1648 schedule_and_wake_txq(local, txqi);
bb42f2d1
THJ		 1649
1650 return true;
1651}
1652
11127e91
JB		 1653static bool ieee80211_tx_frags(struct ieee80211_local *local,
1654 struct ieee80211_vif *vif,
4fd0328d 1655 struct sta_info *sta,
11127e91
JB		 1656 struct sk_buff_head *skbs,
1657 bool txpending)
e2ebc74d 1658{
80a83cfc 1659 struct ieee80211_tx_control control = {};
252b86c4 1660 struct sk_buff *skb, *tmp;
3b8d81e0 1661 unsigned long flags;
e2ebc74d 1662
252b86c4 1663 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1664 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1665 int q = info->hw_queue;
1666
1667#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1668 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1669 __skb_unlink(skb, skbs);
c3e7724b 1670 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1671 continue;
1672 }
1673#endif
3b8d81e0
JB		 1674
1675 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1676 if (local->queue_stop_reasons[q] ||
7bb45683 1677 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1678 if (unlikely(info->flags &
a7679ed5
SF		 1679 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1680 if (local->queue_stop_reasons[q] &
1681 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1682 /*
1683 * Drop off-channel frames if queues
1684 * are stopped for any reason other
1685 * than off-channel operation. Never
1686 * queue them.
1687 */
1688 spin_unlock_irqrestore(
1689 &local->queue_stop_reason_lock,
1690 flags);
1691 ieee80211_purge_tx_queue(&local->hw,
1692 skbs);
1693 return true;
1694 }
1695 } else {
1696
6c17b77b 1697 /*
a7679ed5
SF		 1698 * Since queue is stopped, queue up frames for
1699 * later transmission from the tx-pending
1700 * tasklet when the queue is woken again.
6c17b77b 1701 */
a7679ed5
SF		 1702 if (txpending)
1703 skb_queue_splice_init(skbs,
1704 &local->pending[q]);
1705 else
1706 skb_queue_splice_tail_init(skbs,
1707 &local->pending[q]);
1708
1709 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1710 flags);
1711 return false;
6c17b77b 1712 }
7bb45683 1713 }
3b8d81e0 1714 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1715
11127e91 1716 info->control.vif = vif;
4fd0328d 1717 control.sta = sta ? &sta->sta : NULL;
f0e72851 1718
11127e91 1719 __skb_unlink(skb, skbs);
80a83cfc 1720 drv_tx(local, &control, skb);
11127e91 1721 }
5061b0c2 1722
11127e91
JB		 1723 return true;
1724}
1725
1726/*
1727 * Returns false if the frame couldn't be transmitted but was queued instead.
1728 */
1729static bool __ieee80211_tx(struct ieee80211_local *local,
30f6cf96
FF		 1730 struct sk_buff_head *skbs, struct sta_info *sta,
1731 bool txpending)
11127e91
JB		 1732{
1733 struct ieee80211_tx_info *info;
1734 struct ieee80211_sub_if_data *sdata;
1735 struct ieee80211_vif *vif;
11127e91 1736 struct sk_buff *skb;
958574cb 1737 bool result;
5061b0c2 1738
11127e91
JB		 1739 if (WARN_ON(skb_queue_empty(skbs)))
1740 return true;
ec25acc4 1741
11127e91 1742 skb = skb_peek(skbs);
11127e91
JB		 1743 info = IEEE80211_SKB_CB(skb);
1744 sdata = vif_to_sdata(info->control.vif);
1745 if (sta && !sta->uploaded)
1746 sta = NULL;
1747
11127e91
JB		 1748 switch (sdata->vif.type) {
1749 case NL80211_IFTYPE_MONITOR:
9d40f7e3
FF		 1750 if ((sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
1751 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
c82b5a74
JB		 1752 vif = &sdata->vif;
1753 break;
1754 }
4b6f1dd6 1755 sdata = rcu_dereference(local->monitor_sdata);
8f4fa087 1756 if (sdata && ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
4b6f1dd6 1757 vif = &sdata->vif;
3a25a8c8
JB		 1758 info->hw_queue =
1759 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1760 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1761 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1762 return true;
1763 } else
4b6f1dd6 1764 vif = NULL;
11127e91
JB		 1765 break;
1766 case NL80211_IFTYPE_AP_VLAN:
1767 sdata = container_of(sdata->bss,
1768 struct ieee80211_sub_if_data, u.ap);
fc0561dc 1769 fallthrough;
11127e91
JB		 1770 default:
1771 vif = &sdata->vif;
1772 break;
e2ebc74d 1773 }
2de8e0d9 1774
4fd0328d 1775 result = ieee80211_tx_frags(local, vif, sta, skbs, txpending);
11127e91 1776
4db4e0a1 1777 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1778
11127e91 1779 return result;
e2ebc74d
JB		 1780}
1781
97b045d6
JB		 1782/*
1783 * Invoke TX handlers, return 0 on success and non-zero if the
1784 * frame was dropped or queued.
bb42f2d1
THJ		 1785 *
1786 * The handlers are split into an early and late part. The latter is everything
1787 * that can be sensitive to reordering, and will be deferred to after packets
1788 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1789 */
bb42f2d1 1790static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1791{
97b045d6 1792 ieee80211_tx_result res = TX_DROP;
97b045d6 1793
9aa4aee3
JB		 1794#define CALL_TXH(txh) \
1795 do { \
1796 res = txh(tx); \
1797 if (res != TX_CONTINUE) \
1798 goto txh_done; \
1799 } while (0)
1800
5c1b98a5 1801 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1802 CALL_TXH(ieee80211_tx_h_check_assoc);
1803 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1804 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1805 CALL_TXH(ieee80211_tx_h_select_key);
c6fcf6bc 1806
bb42f2d1
THJ		 1807 txh_done:
1808 if (unlikely(res == TX_DROP)) {
1809 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1810 if (tx->skb)
1811 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1812 else
1813 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1814 return -1;
1815 } else if (unlikely(res == TX_QUEUED)) {
1816 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1817 return -1;
1818 }
1819
1820 return 0;
1821}
1822
1823/*
1824 * Late handlers can be called while the sta lock is held. Handlers that can
1825 * cause packets to be generated will cause deadlock!
1826 */
1827static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1828{
1829 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1830 ieee80211_tx_result res = TX_CONTINUE;
1831
18688c80
FF		 1832 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
1833 CALL_TXH(ieee80211_tx_h_rate_ctrl);
1834
aa5b5492
JB		 1835 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1836 __skb_queue_tail(&tx->skbs, tx->skb);
1837 tx->skb = NULL;
c6fcf6bc 1838 goto txh_done;
aa5b5492 1839 }
c6fcf6bc
JB		 1840
1841 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1842 CALL_TXH(ieee80211_tx_h_sequence);
1843 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1844 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1845 CALL_TXH(ieee80211_tx_h_stats);
1846 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1847 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1848 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1849#undef CALL_TXH
97b045d6 1850
d9e8a70f 1851 txh_done:
97b045d6 1852 if (unlikely(res == TX_DROP)) {
5479d0e7 1853 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1854 if (tx->skb)
c3e7724b 1855 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1856 else
1f98ab7f 1857 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1858 return -1;
1859 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1860 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1861 return -1;
1862 }
1863
1864 return 0;
1865}
1866
bb42f2d1
THJ		 1867static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1868{
1869 int r = invoke_tx_handlers_early(tx);
1870
1871 if (r)
1872 return r;
1873 return invoke_tx_handlers_late(tx);
1874}
1875
06be6b14
FF		 1876bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1877 struct ieee80211_vif *vif, struct sk_buff *skb,
1878 int band, struct ieee80211_sta **sta)
1879{
1880 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1881 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1882 struct ieee80211_tx_data tx;
88724a81 1883 struct sk_buff *skb2;
06be6b14 1884
7c10770f 1885 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1886 return false;
1887
1888 info->band = band;
1889 info->control.vif = vif;
1890 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1891
1892 if (invoke_tx_handlers(&tx))
1893 return false;
1894
1895 if (sta) {
1896 if (tx.sta)
1897 *sta = &tx.sta->sta;
1898 else
1899 *sta = NULL;
1900 }
1901
88724a81
JB		 1902 /* this function isn't suitable for fragmented data frames */
1903 skb2 = __skb_dequeue(&tx.skbs);
1904 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1905 ieee80211_free_txskb(hw, skb2);
1906 ieee80211_purge_tx_queue(hw, &tx.skbs);
1907 return false;
1908 }
1909
06be6b14
FF		 1910 return true;
1911}
1912EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1913
7bb45683
JB		 1914/*
1915 * Returns false if the frame couldn't be transmitted but was queued instead.
1916 */
1917static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f 1918 struct sta_info *sta, struct sk_buff *skb,
08aca29a 1919 bool txpending)
e2ebc74d 1920{
3b8d81e0 1921 struct ieee80211_local *local = sdata->local;
5cf121c3 1922 struct ieee80211_tx_data tx;
97b045d6 1923 ieee80211_tx_result res_prepare;
e039fa4a 1924 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1925 bool result = true;
e2ebc74d 1926
e2ebc74d
JB		 1927 if (unlikely(skb->len < 10)) {
1928 dev_kfree_skb(skb);
7bb45683 1929 return true;
e2ebc74d
JB		 1930 }
1931
58d4185e 1932 /* initialises tx */
7c10770f 1933 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1934
cd8ffc80 1935 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1936 ieee80211_free_txskb(&local->hw, skb);
55de908a 1937 return true;
cd8ffc80 1938 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1939 return true;
e2ebc74d
JB		 1940 }
1941
3a25a8c8
JB		 1942 /* set up hw_queue value early */
1943 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1944 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1945 info->hw_queue =
1946 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1947
bb42f2d1 1948 if (invoke_tx_handlers_early(&tx))
6eae4a6c 1949 return true;
bb42f2d1
THJ		 1950
1951 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1952 return true;
1953
1954 if (!invoke_tx_handlers_late(&tx))
30f6cf96 1955 result = __ieee80211_tx(local, &tx.skbs, tx.sta, txpending);
55de908a 1956
7bb45683 1957 return result;
e2ebc74d
JB		 1958}
1959
1960/* device xmit handlers */
1961
14f46c1e
JB		 1962enum ieee80211_encrypt {
1963 ENCRYPT_NO,
1964 ENCRYPT_MGMT,
1965 ENCRYPT_DATA,
1966};
1967
3bff1865 1968static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a 1969 struct sk_buff *skb,
14f46c1e
JB		 1970 int head_need,
1971 enum ieee80211_encrypt encrypt)
23c0752a 1972{
3bff1865 1973 struct ieee80211_local *local = sdata->local;
9d0f50b8 1974 bool enc_tailroom;
23c0752a
JB		 1975 int tail_need = 0;
1976
14f46c1e
JB		 1977 enc_tailroom = encrypt == ENCRYPT_MGMT ||
1978 (encrypt == ENCRYPT_DATA &&
1979 sdata->crypto_tx_tailroom_needed_cnt);
9d0f50b8
FF		 1980
1981 if (enc_tailroom) {
23c0752a
JB		 1982 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1983 tail_need -= skb_tailroom(skb);
1984 tail_need = max_t(int, tail_need, 0);
1985 }
1986
c70f59a2 1987 if (skb_cloned(skb) &&
30686bf7 1988 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
9d0f50b8 1989 !skb_clone_writable(skb, ETH_HLEN) || enc_tailroom))
23c0752a 1990 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1991 else if (head_need || tail_need)
23c0752a 1992 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1993 else
1994 return 0;
23c0752a
JB		 1995
1996 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1997 wiphy_debug(local->hw.wiphy,
1998 "failed to reallocate TX buffer\n");
23c0752a
JB		 1999 return -ENOMEM;
2000 }
2001
23c0752a
JB		 2002 return 0;
2003}
2004
7c10770f 2005void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
08aca29a 2006 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 2007{
3b8d81e0 2008 struct ieee80211_local *local = sdata->local;
e039fa4a 2009 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
14f46c1e 2010 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 2011 int headroom;
14f46c1e 2012 enum ieee80211_encrypt encrypt;
e2ebc74d 2013
14f46c1e
JB		 2014 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)
2015 encrypt = ENCRYPT_NO;
2016 else if (ieee80211_is_mgmt(hdr->frame_control))
2017 encrypt = ENCRYPT_MGMT;
2018 else
2019 encrypt = ENCRYPT_DATA;
23c0752a 2020
3b8d81e0 2021 headroom = local->tx_headroom;
14f46c1e 2022 if (encrypt != ENCRYPT_NO)
23a5f0af 2023 headroom += IEEE80211_ENCRYPT_HEADROOM;
23c0752a
JB		 2024 headroom -= skb_headroom(skb);
2025 headroom = max_t(int, 0, headroom);
2026
14f46c1e 2027 if (ieee80211_skb_resize(sdata, skb, headroom, encrypt)) {
c3e7724b 2028 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 2029 return;
e2ebc74d
JB		 2030 }
2031
14f46c1e 2032 /* reload after potential resize */
740c1aa3 2033 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 2034 info->control.vif = &sdata->vif;
e2ebc74d 2035
3f52b7e3
MP		 2036 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2037 if (ieee80211_is_data(hdr->frame_control) &&
2038 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 2039 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 2040 return; /* skb queued: don't free */
2041 } else {
2042 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
2043 }
98aed9fd 2044 }
cca89496 2045
2154c81c 2046 ieee80211_set_qos_hdr(sdata, skb);
08aca29a 2047 ieee80211_tx(sdata, sta, skb, false);
e2ebc74d
JB		 2048}
2049
bddc0c41
MV		 2050static bool ieee80211_validate_radiotap_len(struct sk_buff *skb)
2051{
2052 struct ieee80211_radiotap_header *rthdr =
2053 (struct ieee80211_radiotap_header *)skb->data;
2054
2055 /* check for not even having the fixed radiotap header part */
2056 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2057 return false; /* too short to be possibly valid */
2058
2059 /* is it a header version we can trust to find length from? */
2060 if (unlikely(rthdr->it_version))
2061 return false; /* only version 0 is supported */
2062
2063 /* does the skb contain enough to deliver on the alleged length? */
2064 if (unlikely(skb->len < ieee80211_get_radiotap_len(skb->data)))
2065 return false; /* skb too short for claimed rt header extent */
2066
2067 return true;
2068}
2069
cb17ed29
MV		 2070bool ieee80211_parse_tx_radiotap(struct sk_buff *skb,
2071 struct net_device *dev)
73b9f03a 2072{
cb17ed29 2073 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
73b9f03a
JB		 2074 struct ieee80211_radiotap_iterator iterator;
2075 struct ieee80211_radiotap_header *rthdr =
2076 (struct ieee80211_radiotap_header *) skb->data;
2077 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2078 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
2079 NULL);
2080 u16 txflags;
dfdfc2be
SE		 2081 u16 rate = 0;
2082 bool rate_found = false;
2083 u8 rate_retries = 0;
2084 u16 rate_flags = 0;
f66b60f6 2085 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 2086 u16 vht_known;
2087 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 2088 int i;
73b9f03a 2089
bddc0c41
MV		 2090 if (!ieee80211_validate_radiotap_len(skb))
2091 return false;
cb17ed29 2092
73b9f03a
JB		 2093 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2094 IEEE80211_TX_CTL_DONTFRAG;
2095
2096 /*
2097 * for every radiotap entry that is present
2098 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2099 * entries present, or -EINVAL on error)
2100 */
2101
2102 while (!ret) {
2103 ret = ieee80211_radiotap_iterator_next(&iterator);
2104
2105 if (ret)
2106 continue;
2107
2108 /* see if this argument is something we can use */
2109 switch (iterator.this_arg_index) {
2110 /*
2111 * You must take care when dereferencing iterator.this_arg
2112 * for multibyte types... the pointer is not aligned. Use
2113 * get_unaligned((type *)iterator.this_arg) to dereference
2114 * iterator.this_arg for type "type" safely on all arches.
2115 */
2116 case IEEE80211_RADIOTAP_FLAGS:
2117 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2118 /*
2119 * this indicates that the skb we have been
2120 * handed has the 32-bit FCS CRC at the end...
2121 * we should react to that by snipping it off
2122 * because it will be recomputed and added
2123 * on transmission
2124 */
2125 if (skb->len < (iterator._max_length + FCS_LEN))
2126 return false;
2127
2128 skb_trim(skb, skb->len - FCS_LEN);
2129 }
2130 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2131 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2132 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2133 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2134 break;
2135
2136 case IEEE80211_RADIOTAP_TX_FLAGS:
2137 txflags = get_unaligned_le16(iterator.this_arg);
2138 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2139 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e02281e7
MV		 2140 if (txflags & IEEE80211_RADIOTAP_F_TX_NOSEQNO)
2141 info->control.flags |= IEEE80211_TX_CTRL_NO_SEQNO;
30df8130
MV		 2142 if (txflags & IEEE80211_RADIOTAP_F_TX_ORDER)
2143 info->control.flags |=
2144 IEEE80211_TX_CTRL_DONT_REORDER;
73b9f03a
JB		 2145 break;
2146
dfdfc2be
SE		 2147 case IEEE80211_RADIOTAP_RATE:
2148 rate = *iterator.this_arg;
2149 rate_flags = 0;
2150 rate_found = true;
2151 break;
2152
ef246a14
JB		 2153 case IEEE80211_RADIOTAP_ANTENNA:
2154 /* this can appear multiple times, keep a bitmap */
2155 info->control.antennas |= BIT(*iterator.this_arg);
2156 break;
2157
dfdfc2be
SE		 2158 case IEEE80211_RADIOTAP_DATA_RETRIES:
2159 rate_retries = *iterator.this_arg;
2160 break;
2161
2162 case IEEE80211_RADIOTAP_MCS:
2163 mcs_known = iterator.this_arg[0];
2164 mcs_flags = iterator.this_arg[1];
2165 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2166 break;
2167
2168 rate_found = true;
2169 rate = iterator.this_arg[2];
2170 rate_flags = IEEE80211_TX_RC_MCS;
2171
2172 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2173 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2174 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2175
f66b60f6 2176 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2177 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2178 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be 2179 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
f1864e19
PB		 2180
2181 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_FEC &&
2182 mcs_flags & IEEE80211_RADIOTAP_MCS_FEC_LDPC)
2183 info->flags |= IEEE80211_TX_CTL_LDPC;
549fdd34
PB		 2184
2185 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_STBC) {
2186 u8 stbc = u8_get_bits(mcs_flags,
2187 IEEE80211_RADIOTAP_MCS_STBC_MASK);
2188
2189 info->flags |=
2190 u32_encode_bits(stbc,
2191 IEEE80211_TX_CTL_STBC);
2192 }
dfdfc2be
SE		 2193 break;
2194
646e76bb
LB		 2195 case IEEE80211_RADIOTAP_VHT:
2196 vht_known = get_unaligned_le16(iterator.this_arg);
2197 rate_found = true;
2198
2199 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2200 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2201 (iterator.this_arg[2] &
2202 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2203 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2204 if (vht_known &
2205 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2206 if (iterator.this_arg[3] == 1)
2207 rate_flags |=
2208 IEEE80211_TX_RC_40_MHZ_WIDTH;
2209 else if (iterator.this_arg[3] == 4)
2210 rate_flags |=
2211 IEEE80211_TX_RC_80_MHZ_WIDTH;
2212 else if (iterator.this_arg[3] == 11)
2213 rate_flags |=
2214 IEEE80211_TX_RC_160_MHZ_WIDTH;
2215 }
2216
2217 vht_mcs = iterator.this_arg[4] >> 4;
13cb6d82
LB		 2218 if (vht_mcs > 11)
2219 vht_mcs = 0;
646e76bb 2220 vht_nss = iterator.this_arg[4] & 0xF;
13cb6d82
LB		 2221 if (!vht_nss || vht_nss > 8)
2222 vht_nss = 1;
646e76bb
LB		 2223 break;
2224
73b9f03a
JB		 2225 /*
2226 * Please update the file
429ff87b 2227 * Documentation/networking/mac80211-injection.rst
73b9f03a
JB		 2228 * when parsing new fields here.
2229 */
2230
2231 default:
2232 break;
2233 }
2234 }
2235
2236 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2237 return false;
2238
dfdfc2be 2239 if (rate_found) {
bddc0c41
MV		 2240 struct ieee80211_supported_band *sband =
2241 local->hw.wiphy->bands[info->band];
2242
dfdfc2be
SE		 2243 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2244
2245 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2246 info->control.rates[i].idx = -1;
2247 info->control.rates[i].flags = 0;
2248 info->control.rates[i].count = 0;
2249 }
2250
2251 if (rate_flags & IEEE80211_TX_RC_MCS) {
ef246a14
JB		 2252 /* reset antennas if not enough */
2253 if (IEEE80211_HT_MCS_CHAINS(rate) >
2254 hweight8(info->control.antennas))
2255 info->control.antennas = 0;
2256
dfdfc2be 2257 info->control.rates[0].idx = rate;
646e76bb 2258 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
ef246a14
JB		 2259 /* reset antennas if not enough */
2260 if (vht_nss > hweight8(info->control.antennas))
2261 info->control.antennas = 0;
2262
646e76bb
LB		 2263 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2264 vht_nss);
bddc0c41 2265 } else if (sband) {
dfdfc2be
SE		 2266 for (i = 0; i < sband->n_bitrates; i++) {
2267 if (rate * 5 != sband->bitrates[i].bitrate)
2268 continue;
2269
2270 info->control.rates[0].idx = i;
2271 break;
2272 }
2273 }
2274
07310a63
FF		 2275 if (info->control.rates[0].idx < 0)
2276 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2277
dfdfc2be
SE		 2278 info->control.rates[0].flags = rate_flags;
2279 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2280 local->hw.max_rate_tries);
2281 }
2282
73b9f03a
JB		 2283 return true;
2284}
2285
d0cf9c0d
SH		 2286netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2287 struct net_device *dev)
e2ebc74d
JB		 2288{
2289 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2290 struct ieee80211_chanctx_conf *chanctx_conf;
3b8d81e0 2291 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2292 struct ieee80211_hdr *hdr;
5d9cf4a5 2293 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2294 struct cfg80211_chan_def *chandef;
9b8a74e3 2295 u16 len_rthdr;
5d9cf4a5 2296 int hdrlen;
e2ebc74d 2297
c95014e1
AW		 2298 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2299 if (unlikely(!ieee80211_sdata_running(sdata)))
2300 goto fail;
2301
cb17ed29
MV		 2302 memset(info, 0, sizeof(*info));
2303 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2304 IEEE80211_TX_CTL_INJECTED;
9b8a74e3 2305
bddc0c41
MV		 2306 /* Sanity-check the length of the radiotap header */
2307 if (!ieee80211_validate_radiotap_len(skb))
cb17ed29 2308 goto fail;
9b8a74e3 2309
cb17ed29 2310 /* we now know there is a radiotap header with a length we can use */
9b8a74e3
AG		 2311 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2312
e2ebc74d
JB		 2313 /*
2314 * fix up the pointers accounting for the radiotap
2315 * header still being in there. We are being given
2316 * a precooked IEEE80211 header so no need for
2317 * normal processing
2318 */
9b8a74e3 2319 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2320 /*
9b8a74e3
AG		 2321 * these are just fixed to the end of the rt area since we
2322 * don't have any better information and at this point, nobody cares
e2ebc74d 2323 */
9b8a74e3
AG		 2324 skb_set_network_header(skb, len_rthdr);
2325 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2326
5d9cf4a5
JB		 2327 if (skb->len < len_rthdr + 2)
2328 goto fail;
2329
2330 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2331 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2332
2333 if (skb->len < len_rthdr + hdrlen)
2334 goto fail;
2335
f75f5c6f
HS		 2336 /*
2337 * Initialize skb->protocol if the injected frame is a data frame
2338 * carrying a rfc1042 header
2339 */
5d9cf4a5
JB		 2340 if (ieee80211_is_data(hdr->frame_control) &&
2341 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2342 u8 *payload = (u8 *)hdr + hdrlen;
2343
b203ca39 2344 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2345 skb->protocol = cpu_to_be16((payload[6] << 8) |
2346 payload[7]);
f75f5c6f
HS		 2347 }
2348
5d9cf4a5
JB		 2349 rcu_read_lock();
2350
2351 /*
2352 * We process outgoing injected frames that have a local address
2353 * we handle as though they are non-injected frames.
2354 * This code here isn't entirely correct, the local MAC address
2355 * isn't always enough to find the interface to use; for proper
70d9c599 2356 * VLAN support we have an nl80211-based mechanism.
b226a826
JB		 2357 *
2358 * This is necessary, for example, for old hostapd versions that
2359 * don't use nl80211-based management TX/RX.
5d9cf4a5 2360 */
5d9cf4a5
JB		 2361 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2362 if (!ieee80211_sdata_running(tmp_sdata))
2363 continue;
2364 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
70d9c599 2365 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
5d9cf4a5 2366 continue;
b203ca39 2367 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2368 sdata = tmp_sdata;
2369 break;
2370 }
2371 }
7351c6bd 2372
d0a9123e 2373 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
55de908a
JB		 2374 if (!chanctx_conf) {
2375 tmp_sdata = rcu_dereference(local->monitor_sdata);
2376 if (tmp_sdata)
2377 chanctx_conf =
d0a9123e 2378 rcu_dereference(tmp_sdata->vif.bss_conf.chanctx_conf);
55de908a 2379 }
55de908a 2380
b4a7ff75 2381 if (chanctx_conf)
b4932836 2382 chandef = &chanctx_conf->def;
b4a7ff75
FF		 2383 else
2384 goto fail_rcu;
55de908a 2385
49c17da3
JB		 2386 /*
2387 * If driver/HW supports IEEE80211_CHAN_CAN_MONITOR we still
2388 * shouldn't transmit on disabled channels.
2389 */
2390 if (!cfg80211_chandef_usable(local->hw.wiphy, chandef,
2391 IEEE80211_CHAN_DISABLED))
2392 goto fail_rcu;
2393
55de908a
JB		 2394 /*
2395 * Frame injection is not allowed if beaconing is not allowed
2396 * or if we need radar detection. Beaconing is usually not allowed when
2397 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2398 * Passive scan is also used in world regulatory domains where
2399 * your country is not known and as such it should be treated as
2400 * NO TX unless the channel is explicitly allowed in which case
2401 * your current regulatory domain would not have the passive scan
2402 * flag.
2403 *
2404 * Since AP mode uses monitor interfaces to inject/TX management
2405 * frames we can make AP mode the exception to this rule once it
2406 * supports radar detection as its implementation can deal with
2407 * radar detection by itself. We can do that later by adding a
2408 * monitor flag interfaces used for AP support.
2409 */
b4932836
JD		 2410 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2411 sdata->vif.type))
55de908a
JB		 2412 goto fail_rcu;
2413
73c4e195 2414 info->band = chandef->chan->band;
109843b0 2415
96a7109a
JA		 2416 /* Initialize skb->priority according to frame type and TID class,
2417 * with respect to the sub interface that the frame will actually
2418 * be transmitted on. If the DONT_REORDER flag is set, the original
2419 * skb-priority is preserved to assure frames injected with this
2420 * flag are not reordered relative to each other.
2421 */
2422 ieee80211_select_queue_80211(sdata, skb, hdr);
2423 skb_set_queue_mapping(skb, ieee80211_ac_from_tid(skb->priority));
2424
bddc0c41
MV		 2425 /*
2426 * Process the radiotap header. This will now take into account the
2427 * selected chandef above to accurately set injection rates and
2428 * retransmissions.
2429 */
2430 if (!ieee80211_parse_tx_radiotap(skb, dev))
2431 goto fail_rcu;
2432
cb17ed29
MV		 2433 /* remove the injection radiotap header */
2434 skb_pull(skb, len_rthdr);
109843b0 2435
08aca29a 2436 ieee80211_xmit(sdata, NULL, skb);
5d9cf4a5
JB		 2437 rcu_read_unlock();
2438
e2ebc74d 2439 return NETDEV_TX_OK;
9b8a74e3 2440
55de908a
JB		 2441fail_rcu:
2442 rcu_read_unlock();
9b8a74e3
AG		 2443fail:
2444 dev_kfree_skb(skb);
2445 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2446}
2447
97ffe757 2448static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2449{
97ffe757 2450 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2451
97ffe757
JB		 2452 return ethertype == ETH_P_TDLS &&
2453 skb->len > 14 &&
2454 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2455}
2456
50ff477a
JC		 2457int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2458 struct sk_buff *skb,
2459 struct sta_info **sta_out)
97ffe757
JB		 2460{
2461 struct sta_info *sta;
2462
2463 switch (sdata->vif.type) {
2464 case NL80211_IFTYPE_AP_VLAN:
2465 sta = rcu_dereference(sdata->u.vlan.sta);
2466 if (sta) {
2467 *sta_out = sta;
2468 return 0;
2469 } else if (sdata->wdev.use_4addr) {
2470 return -ENOLINK;
2471 }
fc0561dc 2472 fallthrough;
97ffe757
JB		 2473 case NL80211_IFTYPE_AP:
2474 case NL80211_IFTYPE_OCB:
2475 case NL80211_IFTYPE_ADHOC:
2476 if (is_multicast_ether_addr(skb->data)) {
2477 *sta_out = ERR_PTR(-ENOENT);
2478 return 0;
2479 }
2480 sta = sta_info_get_bss(sdata, skb->data);
2481 break;
97ffe757
JB		 2482#ifdef CONFIG_MAC80211_MESH
2483 case NL80211_IFTYPE_MESH_POINT:
2484 /* determined much later */
2485 *sta_out = NULL;
2486 return 0;
2487#endif
2488 case NL80211_IFTYPE_STATION:
2489 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2490 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2491 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2492 if (test_sta_flag(sta,
2493 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2494 *sta_out = sta;
2495 return 0;
2496 }
2497
2498 /*
2499 * TDLS link during setup - throw out frames to
2500 * peer. Allow TDLS-setup frames to unauthorized
2501 * peers for the special case of a link teardown
2502 * after a TDLS sta is removed due to being
2503 * unreachable.
2504 */
11d62caf 2505 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2506 return -EINVAL;
2507 }
2508
2509 }
2510
81151ce4 2511 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr);
97ffe757
JB		 2512 if (!sta)
2513 return -ENOLINK;
2514 break;
2515 default:
2516 return -EINVAL;
2517 }
2518
2519 *sta_out = sta ?: ERR_PTR(-ENOENT);
2520 return 0;
ad38bfc9
MG		 2521}
2522
a7528198 2523static u16 ieee80211_store_ack_skb(struct ieee80211_local *local,
5d8983c8 2524 struct sk_buff *skb,
a7528198
MT		 2525 u32 *info_flags,
2526 u64 *cookie)
5d8983c8 2527{
a7528198 2528 struct sk_buff *ack_skb;
5d8983c8
JC		 2529 u16 info_id = 0;
2530
a7528198
MT		 2531 if (skb->sk)
2532 ack_skb = skb_clone_sk(skb);
2533 else
2534 ack_skb = skb_clone(skb, GFP_ATOMIC);
2535
5d8983c8
JC		 2536 if (ack_skb) {
2537 unsigned long flags;
2538 int id;
2539
2540 spin_lock_irqsave(&local->ack_status_lock, flags);
2541 id = idr_alloc(&local->ack_status_frames, ack_skb,
f2b18bac 2542 1, 0x2000, GFP_ATOMIC);
5d8983c8
JC		 2543 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2544
2545 if (id >= 0) {
2546 info_id = id;
2547 *info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a7528198
MT		 2548 if (cookie) {
2549 *cookie = ieee80211_mgmt_tx_cookie(local);
2550 IEEE80211_SKB_CB(ack_skb)->ack.cookie = *cookie;
2551 }
5d8983c8
JC		 2552 } else {
2553 kfree_skb(ack_skb);
2554 }
2555 }
2556
2557 return info_id;
2558}
2559
e2ebc74d 2560/**
4c9451ed
JB		 2561 * ieee80211_build_hdr - build 802.11 header in the given frame
2562 * @sdata: virtual interface to build the header for
2563 * @skb: the skb to build the header in
24d342c5 2564 * @info_flags: skb flags to set
f0daf54f 2565 * @sta: the station pointer
06016772 2566 * @ctrl_flags: info control flags to set
f0daf54f 2567 * @cookie: cookie pointer to fill (if not %NULL)
e2ebc74d 2568 *
4c9451ed
JB		 2569 * This function takes the skb with 802.3 header and reformats the header to
2570 * the appropriate IEEE 802.11 header based on which interface the packet is
2571 * being transmitted on.
2572 *
2573 * Note that this function also takes care of the TX status request and
2574 * potential unsharing of the SKB - this needs to be interleaved with the
2575 * header building.
e2ebc74d 2576 *
4c9451ed
JB		 2577 * The function requires the read-side RCU lock held
2578 *
2579 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2580 */
4c9451ed 2581static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2582 struct sk_buff *skb, u32 info_flags,
a7528198
MT		 2583 struct sta_info *sta, u32 ctrl_flags,
2584 u64 *cookie)
e2ebc74d 2585{
133b8226 2586 struct ieee80211_local *local = sdata->local;
489ee919 2587 struct ieee80211_tx_info *info;
dcf33963 2588 int head_need;
065e9605
HH		 2589 u16 ethertype, hdrlen, meshhdrlen = 0;
2590 __le16 fc;
e2ebc74d 2591 struct ieee80211_hdr hdr;
ff67bb86 2592 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2593 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2594 const u8 *encaps_data;
2595 int encaps_len, skip_header_bytes;
97ffe757
JB		 2596 bool wme_sta = false, authorized = false;
2597 bool tdls_peer;
a729cff8 2598 bool multicast;
a729cff8 2599 u16 info_id = 0;
eef25a66 2600 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
57fbcce3 2601 enum nl80211_band band;
4c9451ed 2602 int ret;
963d0e8d 2603 u8 link_id = u32_get_bits(ctrl_flags, IEEE80211_TX_CTRL_MLO_LINK);
e2ebc74d 2604
97ffe757
JB		 2605 if (IS_ERR(sta))
2606 sta = NULL;
2607
276d9e82
JN		 2608#ifdef CONFIG_MAC80211_DEBUGFS
2609 if (local->force_tx_status)
2610 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
2611#endif
2612
e2ebc74d
JB		 2613 /* convert Ethernet header to proper 802.11 header (based on
2614 * operation mode) */
2615 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2616 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2617
f1871abd 2618 if (!ieee80211_vif_is_mld(&sdata->vif))
eef25a66
JB		 2619 chanctx_conf =
2620 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
27f852de 2621
51fb61e7 2622 switch (sdata->vif.type) {
05c914fe 2623 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2624 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2625 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2626 /* RA TA DA SA */
2627 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2628 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2629 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2630 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2631 hdrlen = 30;
c2c98fde 2632 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2633 wme_sta = sta->sta.wme;
f14543ee 2634 }
f1871abd 2635 if (!ieee80211_vif_is_mld(&sdata->vif)) {
eef25a66
JB		 2636 struct ieee80211_sub_if_data *ap_sdata;
2637
2638 /* override chanctx_conf from AP (we don't have one) */
2639 ap_sdata = container_of(sdata->bss,
2640 struct ieee80211_sub_if_data,
2641 u.ap);
2642 chanctx_conf =
2643 rcu_dereference(ap_sdata->vif.bss_conf.chanctx_conf);
2644 }
97ffe757 2645 if (sdata->wdev.use_4addr)
f14543ee 2646 break;
fc0561dc 2647 fallthrough;
f14543ee 2648 case NL80211_IFTYPE_AP:
065e9605 2649 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2650 /* DA BSSID SA */
2651 memcpy(hdr.addr1, skb->data, ETH_ALEN);
3e0278b7 2652
f1871abd 2653 if (ieee80211_vif_is_mld(&sdata->vif) && sta && !sta->sta.mlo) {
3e0278b7
AO		 2654 struct ieee80211_link_data *link;
2655
2656 link_id = sta->deflink.link_id;
2657 link = rcu_dereference(sdata->link[link_id]);
2658 if (WARN_ON(!link)) {
2659 ret = -ENOLINK;
2660 goto free;
2661 }
2662 memcpy(hdr.addr2, link->conf->addr, ETH_ALEN);
a6ba64d0
JB		 2663 } else if (link_id == IEEE80211_LINK_UNSPECIFIED ||
2664 (sta && sta->sta.mlo)) {
3e0278b7 2665 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
963d0e8d
JB		 2666 } else {
2667 struct ieee80211_bss_conf *conf;
2668
2669 conf = rcu_dereference(sdata->vif.link_conf[link_id]);
2670 if (unlikely(!conf)) {
2671 ret = -ENOLINK;
2672 goto free;
2673 }
2674
2675 memcpy(hdr.addr2, conf->addr, ETH_ALEN);
3e0278b7
AO		 2676 }
2677
e2ebc74d
JB		 2678 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2679 hdrlen = 24;
cf966838 2680 break;
33b64eb2 2681#ifdef CONFIG_MAC80211_MESH
05c914fe 2682 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2683 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2684 struct sta_info *next_hop;
2685 bool mpp_lookup = true;
2686
bf7cd94d 2687 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2688 if (mpath) {
2689 mpp_lookup = false;
2690 next_hop = rcu_dereference(mpath->next_hop);
2691 if (!next_hop ||
2692 !(mpath->flags & (MESH_PATH_ACTIVE |
2693 MESH_PATH_RESOLVING)))
2694 mpp_lookup = true;
2695 }
2696
ab1c7906 2697 if (mpp_lookup) {
bf7cd94d 2698 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2699 if (mppath)
2700 mppath->exp_time = jiffies;
2701 }
163df6cf
CYY		 2702
2703 if (mppath && mpath)
2bdaf386 2704 mesh_path_del(sdata, mpath->dst);
b8bacc18 2705 }
79617dee 2706
f76b57b4 2707 /*
9d52501b
JF		 2708 * Use address extension if it is a packet from
2709 * another interface or if we know the destination
2710 * is being proxied by a portal (i.e. portal address
2711 * differs from proxied address)
f76b57b4 2712 */
b203ca39
JP		 2713 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2714 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2715 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2716 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2717 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2718 NULL, NULL);
79617dee 2719 } else {
27f01124
TP		 2720 /* DS -> MBSS (802.11-2012 13.11.3.3).
2721 * For unicast with unknown forwarding information,
2722 * destination might be in the MBSS or if that fails
2723 * forwarded to another mesh gate. In either case
2724 * resolution will be handled in ieee80211_xmit(), so
2725 * leave the original DA. This also works for mcast */
2726 const u8 *mesh_da = skb->data;
2727
2728 if (mppath)
2729 mesh_da = mppath->mpp;
2730 else if (mpath)
2731 mesh_da = mpath->dst;
79617dee 2732
3c5772a5 2733 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2734 mesh_da, sdata->vif.addr);
27f01124
TP		 2735 if (is_multicast_ether_addr(mesh_da))
2736 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2737 meshhdrlen = ieee80211_new_mesh_header(
2738 sdata, &mesh_hdr,
2739 skb->data + ETH_ALEN, NULL);
3c5772a5 2740 else
27f01124 2741 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2742 meshhdrlen = ieee80211_new_mesh_header(
2743 sdata, &mesh_hdr, skb->data,
2744 skb->data + ETH_ALEN);
79617dee 2745
79617dee 2746 }
8828f81a
RM		 2747
2748 /* For injected frames, fill RA right away as nexthop lookup
2749 * will be skipped.
2750 */
2751 if ((ctrl_flags & IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP) &&
2752 is_zero_ether_addr(hdr.addr1))
2753 memcpy(hdr.addr1, skb->data, ETH_ALEN);
33b64eb2
LCC		 2754 break;
2755#endif
05c914fe 2756 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2757 /* we already did checks when looking up the RA STA */
2758 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2759
97ffe757 2760 if (tdls_peer) {
8cc07265 2761 /* For TDLS only one link can be valid with peer STA */
d42fcaec 2762 int tdls_link_id = ieee80211_tdls_sta_link_id(sta);
8cc07265
AN		 2763 struct ieee80211_link_data *link;
2764
941c93cd
AN		 2765 /* DA SA BSSID */
2766 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2767 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
8cc07265
AN		 2768 link = rcu_dereference(sdata->link[tdls_link_id]);
2769 if (WARN_ON_ONCE(!link)) {
2770 ret = -EINVAL;
2771 goto free;
2772 }
2773 memcpy(hdr.addr3, link->u.mgd.bssid, ETH_ALEN);
941c93cd
AN		 2774 hdrlen = 24;
2775 } else if (sdata->u.mgd.use_4addr &&
2776 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2777 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2778 IEEE80211_FCTL_TODS);
f14543ee 2779 /* RA TA DA SA */
bfd8403a 2780 memcpy(hdr.addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
47846c9b 2781 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2782 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2783 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2784 hdrlen = 30;
2785 } else {
2786 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2787 /* BSSID SA DA */
8a9be422 2788 memcpy(hdr.addr1, sdata->vif.cfg.ap_addr, ETH_ALEN);
f14543ee
FF		 2789 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2790 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2791 hdrlen = 24;
2792 }
cf966838 2793 break;
239281f8
RL		 2794 case NL80211_IFTYPE_OCB:
2795 /* DA SA BSSID */
2796 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2797 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2798 eth_broadcast_addr(hdr.addr3);
2799 hdrlen = 24;
239281f8 2800 break;
05c914fe 2801 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2802 /* DA SA BSSID */
2803 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2804 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2805 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2806 hdrlen = 24;
cf966838
JB		 2807 break;
2808 default:
4c9451ed
JB		 2809 ret = -EINVAL;
2810 goto free;
e2ebc74d
JB		 2811 }
2812
27f852de 2813 if (!chanctx_conf) {
f1871abd 2814 if (!ieee80211_vif_is_mld(&sdata->vif)) {
eef25a66
JB		 2815 ret = -ENOTCONN;
2816 goto free;
2817 }
2818 /* MLD transmissions must not rely on the band */
2819 band = 0;
2820 } else {
2821 band = chanctx_conf->def.chan->band;
27f852de 2822 }
27f852de 2823
a729cff8 2824 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2825
97ffe757
JB		 2826 /* sta is always NULL for mesh */
2827 if (sta) {
2828 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2829 wme_sta = sta->sta.wme;
2830 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2831 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2832 wme_sta = true;
97ffe757 2833 }
4777be41 2834
527871d7
JB		 2835 /* receiver does QoS (which also means we do) use it */
2836 if (wme_sta) {
065e9605 2837 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2838 hdrlen += 2;
2839 }
2840
2841 /*
238814fd
JB		 2842 * Drop unicast frames to unauthorised stations unless they are
2843 * EAPOL frames from the local station.
ce3edf6d 2844 */
55182e4a 2845 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2846 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2847 !multicast && !authorized &&
55182e4a 2848 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
0d5891e3 2849 !ieee80211_is_our_addr(sdata, skb->data + ETH_ALEN, NULL)))) {
ce3edf6d 2850#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2851 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2852 sdata->name, hdr.addr1);
ce3edf6d
JB		 2853#endif
2854
2855 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2856
4c9451ed
JB		 2857 ret = -EPERM;
2858 goto free;
ce3edf6d
JB		 2859 }
2860
0499bead 2861 if (unlikely(!multicast &&
d7500fbf 2862 (sk_requests_wifi_status(skb->sk) ||
0499bead 2863 ctrl_flags & IEEE80211_TX_CTL_REQ_TX_STATUS)))
a7528198
MT		 2864 info_id = ieee80211_store_ack_skb(local, skb, &info_flags,
2865 cookie);
a729cff8 2866
7e244707
HS		 2867 /*
2868 * If the skb is shared we need to obtain our own copy.
2869 */
a4926abb
RL		 2870 skb = skb_share_check(skb, GFP_ATOMIC);
2871 if (unlikely(!skb)) {
2872 ret = -ENOMEM;
2873 goto free;
7e244707
HS		 2874 }
2875
065e9605 2876 hdr.frame_control = fc;
e2ebc74d
JB		 2877 hdr.duration_id = 0;
2878 hdr.seq_ctrl = 0;
2879
2880 skip_header_bytes = ETH_HLEN;
2881 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2882 encaps_data = bridge_tunnel_header;
2883 encaps_len = sizeof(bridge_tunnel_header);
2884 skip_header_bytes -= 2;
e5c5d22e 2885 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2886 encaps_data = rfc1042_header;
2887 encaps_len = sizeof(rfc1042_header);
2888 skip_header_bytes -= 2;
2889 } else {
2890 encaps_data = NULL;
2891 encaps_len = 0;
2892 }
2893
2894 skb_pull(skb, skip_header_bytes);
23c0752a 2895 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2896
23c0752a
JB		 2897 /*
2898 * So we need to modify the skb header and hence need a copy of
2899 * that. The head_need variable above doesn't, so far, include
2900 * the needed header space that we don't need right away. If we
2901 * can, then we don't reallocate right now but only after the
2902 * frame arrives at the master device (if it does...)
2903 *
2904 * If we cannot, however, then we will reallocate to include all
2905 * the ever needed space. Also, if we need to reallocate it anyway,
2906 * make it big enough for everything we may ever need.
2907 */
e2ebc74d 2908
3a5be7d4 2909 if (head_need > 0 || skb_cloned(skb)) {
23a5f0af 2910 head_need += IEEE80211_ENCRYPT_HEADROOM;
23c0752a
JB		 2911 head_need += local->tx_headroom;
2912 head_need = max_t(int, 0, head_need);
14f46c1e 2913 if (ieee80211_skb_resize(sdata, skb, head_need, ENCRYPT_DATA)) {
c3e7724b 2914 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2915 skb = NULL;
4c9451ed 2916 return ERR_PTR(-ENOMEM);
c3e7724b 2917 }
e2ebc74d
JB		 2918 }
2919
eae4430e 2920 if (encaps_data)
e2ebc74d 2921 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2922
e4ab7eb0 2923#ifdef CONFIG_MAC80211_MESH
eae4430e 2924 if (meshhdrlen > 0)
33b64eb2 2925 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2926#endif
33b64eb2 2927
065e9605 2928 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2929 __le16 *qos_control;
2930
d58ff351 2931 qos_control = skb_push(skb, 2);
c29b9b9b
JB		 2932 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2933 /*
2934 * Maybe we could actually set some fields here, for now just
2935 * initialise to zero to indicate no special operation.
2936 */
2937 *qos_control = 0;
2938 } else
2939 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2940
d57a544d 2941 skb_reset_mac_header(skb);
e2ebc74d 2942
489ee919 2943 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2944 memset(info, 0, sizeof(*info));
2945
a729cff8 2946 info->flags = info_flags;
f498f6ab
JB		 2947 if (info_id) {
2948 info->status_data = info_id;
2949 info->status_data_idr = 1;
2950 }
73c4e195 2951 info->band = band;
9dd19538
JB		 2952
2953 if (likely(!cookie)) {
2954 ctrl_flags |= u32_encode_bits(link_id,
69d41b5a 2955 IEEE80211_TX_CTRL_MLO_LINK);
9dd19538
JB		 2956 } else {
2957 unsigned int pre_conf_link_id;
2958
2959 /*
2960 * ctrl_flags already have been set by
2961 * ieee80211_tx_control_port(), here
2962 * we just sanity check that
2963 */
2964
2965 pre_conf_link_id = u32_get_bits(ctrl_flags,
2966 IEEE80211_TX_CTRL_MLO_LINK);
2967
2968 if (pre_conf_link_id != link_id &&
2969 link_id != IEEE80211_LINK_UNSPECIFIED) {
9d13aff9 2970#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
9dd19538
JB		 2971 net_info_ratelimited("%s: dropped frame to %pM with bad link ID request (%d vs. %d)\n",
2972 sdata->name, hdr.addr1,
2973 pre_conf_link_id, link_id);
2974#endif
2975 ret = -EINVAL;
2976 goto free;
2977 }
2978 }
2979
2980 info->control.flags = ctrl_flags;
a729cff8 2981
4c9451ed
JB		 2982 return skb;
2983 free:
2984 kfree_skb(skb);
2985 return ERR_PTR(ret);
2986}
2987
17c18bf8
JB		 2988/*
2989 * fast-xmit overview
2990 *
2991 * The core idea of this fast-xmit is to remove per-packet checks by checking
2992 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2993 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2994 * much less work can be done per packet. For example, fragmentation must be
2995 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2996 * in the code here.
2997 *
2998 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2999 * header and other data to aid packet processing in ieee80211_xmit_fast().
3000 *
3001 * The most difficult part of this is that when any of these assumptions
3002 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
3003 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
3004 * since the per-packet code no longer checks the conditions. This is reflected
3005 * by the calls to these functions throughout the rest of the code, and must be
3006 * maintained if any of the TX path checks change.
3007 */
3008
3009void ieee80211_check_fast_xmit(struct sta_info *sta)
3010{
3011 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
3012 struct ieee80211_local *local = sta->local;
3013 struct ieee80211_sub_if_data *sdata = sta->sdata;
3014 struct ieee80211_hdr *hdr = (void *)build.hdr;
3015 struct ieee80211_chanctx_conf *chanctx_conf;
3016 __le16 fc;
3017
30686bf7 3018 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 3019 return;
3020
d5edb9ae
FF		 3021 if (ieee80211_vif_is_mesh(&sdata->vif))
3022 mesh_fast_tx_flush_sta(sdata, sta);
3023
17c18bf8
JB		 3024 /* Locking here protects both the pointer itself, and against concurrent
3025 * invocations winning data access races to, e.g., the key pointer that
3026 * is used.
3027 * Without it, the invocation of this function right after the key
3028 * pointer changes wouldn't be sufficient, as another CPU could access
3029 * the pointer, then stall, and then do the cache update after the CPU
3030 * that invalidated the key.
3031 * With the locking, such scenarios cannot happen as the check for the
3032 * key and the fast-tx assignment are done atomically, so the CPU that
3033 * modifies the key will either wait or other one will see the key
3034 * cleared/changed already.
3035 */
3036 spin_lock_bh(&sta->lock);
30686bf7
JB		 3037 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
3038 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 3039 sdata->vif.type == NL80211_IFTYPE_STATION)
3040 goto out;
3041
bcbc84af 3042 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED) || !sta->uploaded)
17c18bf8
JB		 3043 goto out;
3044
3045 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
3046 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 3047 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
3048 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 3049 goto out;
3050
3051 if (sdata->noack_map)
3052 goto out;
3053
3054 /* fast-xmit doesn't handle fragmentation at all */
725b812c 3055 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
f3fe4e93 3056 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
17c18bf8
JB		 3057 goto out;
3058
f1871abd 3059 if (!ieee80211_vif_is_mld(&sdata->vif)) {
eef25a66
JB		 3060 rcu_read_lock();
3061 chanctx_conf =
3062 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
3063 if (!chanctx_conf) {
3064 rcu_read_unlock();
3065 goto out;
3066 }
3067 build.band = chanctx_conf->def.chan->band;
17c18bf8 3068 rcu_read_unlock();
eef25a66
JB		 3069 } else {
3070 /* MLD transmissions must not rely on the band */
3071 build.band = 0;
17c18bf8 3072 }
17c18bf8
JB		 3073
3074 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
3075
3076 switch (sdata->vif.type) {
3ffd8840
JB		 3077 case NL80211_IFTYPE_ADHOC:
3078 /* DA SA BSSID */
3079 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3080 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3081 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
3082 build.hdr_len = 24;
3083 break;
17c18bf8
JB		 3084 case NL80211_IFTYPE_STATION:
3085 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
8cc07265 3086 /* For TDLS only one link can be valid with peer STA */
d42fcaec 3087 int tdls_link_id = ieee80211_tdls_sta_link_id(sta);
8cc07265
AN		 3088 struct ieee80211_link_data *link;
3089
17c18bf8
JB		 3090 /* DA SA BSSID */
3091 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
3092 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
9480adfe 3093 rcu_read_lock();
8cc07265 3094 link = rcu_dereference(sdata->link[tdls_link_id]);
9480adfe
JB		 3095 if (!WARN_ON_ONCE(!link))
3096 memcpy(hdr->addr3, link->u.mgd.bssid, ETH_ALEN);
3097 rcu_read_unlock();
17c18bf8
JB		 3098 build.hdr_len = 24;
3099 break;
3100 }
3101
3102 if (sdata->u.mgd.use_4addr) {
3103 /* non-regular ethertype cannot use the fastpath */
3104 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3105 IEEE80211_FCTL_TODS);
3106 /* RA TA DA SA */
bfd8403a 3107 memcpy(hdr->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN);
17c18bf8
JB		 3108 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3109 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3110 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3111 build.hdr_len = 30;
3112 break;
3113 }
3114 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
3115 /* BSSID SA DA */
8a9be422 3116 memcpy(hdr->addr1, sdata->vif.cfg.ap_addr, ETH_ALEN);
17c18bf8
JB		 3117 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3118 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
3119 build.hdr_len = 24;
3120 break;
3121 case NL80211_IFTYPE_AP_VLAN:
3122 if (sdata->wdev.use_4addr) {
3123 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
3124 IEEE80211_FCTL_TODS);
3125 /* RA TA DA SA */
3126 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
3127 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3128 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
3129 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
3130 build.hdr_len = 30;
3131 break;
3132 }
fc0561dc 3133 fallthrough;
17c18bf8
JB		 3134 case NL80211_IFTYPE_AP:
3135 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
3136 /* DA BSSID SA */
3137 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
f1871abd 3138 if (sta->sta.mlo || !ieee80211_vif_is_mld(&sdata->vif)) {
0f13f3c3
JB		 3139 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
3140 } else {
3141 unsigned int link_id = sta->deflink.link_id;
3142 struct ieee80211_link_data *link;
3143
3144 rcu_read_lock();
3145 link = rcu_dereference(sdata->link[link_id]);
3146 if (WARN_ON(!link)) {
3147 rcu_read_unlock();
3148 goto out;
3149 }
3150 memcpy(hdr->addr2, link->conf->addr, ETH_ALEN);
3151 rcu_read_unlock();
3152 }
17c18bf8
JB		 3153 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
3154 build.hdr_len = 24;
3155 break;
3156 default:
3157 /* not handled on fast-xmit */
3158 goto out;
3159 }
3160
3161 if (sta->sta.wme) {
3162 build.hdr_len += 2;
3163 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
3164 }
3165
3166 /* We store the key here so there's no point in using rcu_dereference()
3167 * but that's fine because the code that changes the pointers will call
3168 * this function after doing so. For a single CPU that would be enough,
3169 * for multiple see the comment above.
3170 */
3171 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
3172 if (!build.key)
3173 build.key = rcu_access_pointer(sdata->default_unicast_key);
3174 if (build.key) {
e495c247 3175 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 3176
3177 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
3178 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
9de18d81
DS		 3179 mmic = build.key->conf.flags &
3180 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
3181 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
17c18bf8
JB		 3182
3183 /* don't handle software crypto */
3184 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
3185 goto out;
3186
62872a9b
AW		 3187 /* Key is being removed */
3188 if (build.key->flags & KEY_FLAG_TAINTED)
3189 goto out;
3190
17c18bf8
JB		 3191 switch (build.key->conf.cipher) {
3192 case WLAN_CIPHER_SUITE_CCMP:
3193 case WLAN_CIPHER_SUITE_CCMP_256:
96fc6efb 3194 if (gen_iv)
17c18bf8 3195 build.pn_offs = build.hdr_len;
17c18bf8
JB		 3196 if (gen_iv || iv_spc)
3197 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
3198 break;
3199 case WLAN_CIPHER_SUITE_GCMP:
3200 case WLAN_CIPHER_SUITE_GCMP_256:
96fc6efb 3201 if (gen_iv)
17c18bf8 3202 build.pn_offs = build.hdr_len;
17c18bf8
JB		 3203 if (gen_iv || iv_spc)
3204 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
3205 break;
e495c247
JB		 3206 case WLAN_CIPHER_SUITE_TKIP:
3207 /* cannot handle MMIC or IV generation in xmit-fast */
3208 if (mmic || gen_iv)
3209 goto out;
3210 if (iv_spc)
3211 build.hdr_len += IEEE80211_TKIP_IV_LEN;
3212 break;
3213 case WLAN_CIPHER_SUITE_WEP40:
3214 case WLAN_CIPHER_SUITE_WEP104:
3215 /* cannot handle IV generation in fast-xmit */
3216 if (gen_iv)
3217 goto out;
3218 if (iv_spc)
3219 build.hdr_len += IEEE80211_WEP_IV_LEN;
3220 break;
3221 case WLAN_CIPHER_SUITE_AES_CMAC:
3222 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
3223 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
3224 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3225 WARN(1,
3226 "management cipher suite 0x%x enabled for data\n",
3227 build.key->conf.cipher);
17c18bf8 3228 goto out;
e495c247
JB		 3229 default:
3230 /* we don't know how to generate IVs for this at all */
3231 if (WARN_ON(gen_iv))
3232 goto out;
17c18bf8
JB		 3233 }
3234
3235 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3236 }
3237
3238 hdr->frame_control = fc;
3239
3240 memcpy(build.hdr + build.hdr_len,
3241 rfc1042_header, sizeof(rfc1042_header));
3242 build.hdr_len += sizeof(rfc1042_header);
3243
3244 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3245 /* if the kmemdup fails, continue w/o fast_tx */
17c18bf8
JB		 3246
3247 out:
3248 /* we might have raced against another call to this function */
3249 old = rcu_dereference_protected(sta->fast_tx,
3250 lockdep_is_held(&sta->lock));
3251 rcu_assign_pointer(sta->fast_tx, fast_tx);
3252 if (old)
3253 kfree_rcu(old, rcu_head);
3254 spin_unlock_bh(&sta->lock);
3255}
3256
3257void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3258{
3259 struct sta_info *sta;
3260
3261 rcu_read_lock();
3262 list_for_each_entry_rcu(sta, &local->sta_list, list)
3263 ieee80211_check_fast_xmit(sta);
3264 rcu_read_unlock();
3265}
3266
3267void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3268{
3269 struct ieee80211_local *local = sdata->local;
3270 struct sta_info *sta;
3271
3272 rcu_read_lock();
3273
3274 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3275 if (sdata != sta->sdata &&
3276 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3277 continue;
3278 ieee80211_check_fast_xmit(sta);
3279 }
3280
3281 rcu_read_unlock();
3282}
3283
3284void ieee80211_clear_fast_xmit(struct sta_info *sta)
3285{
3286 struct ieee80211_fast_tx *fast_tx;
3287
3288 spin_lock_bh(&sta->lock);
3289 fast_tx = rcu_dereference_protected(sta->fast_tx,
3290 lockdep_is_held(&sta->lock));
3291 RCU_INIT_POINTER(sta->fast_tx, NULL);
3292 spin_unlock_bh(&sta->lock);
3293
3294 if (fast_tx)
3295 kfree_rcu(fast_tx, rcu_head);
3296}
3297
6e0456b5 3298static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
166ac9d5 3299 struct sk_buff *skb, int headroom)
6e0456b5 3300{
166ac9d5 3301 if (skb_headroom(skb) < headroom) {
6e0456b5
FF		 3302 I802_DEBUG_INC(local->tx_expand_skb_head);
3303
166ac9d5 3304 if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) {
6e0456b5
FF		 3305 wiphy_debug(local->hw.wiphy,
3306 "failed to reallocate TX buffer\n");
3307 return false;
3308 }
3309 }
3310
6e0456b5
FF		 3311 return true;
3312}
3313
3314static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3315 struct ieee80211_fast_tx *fast_tx,
3316 struct sk_buff *skb)
3317{
3318 struct ieee80211_local *local = sdata->local;
3319 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3320 struct ieee80211_hdr *hdr;
06f2bb1e 3321 struct ethhdr *amsdu_hdr;
6e0456b5
FF		 3322 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3323 int subframe_len = skb->len - hdr_len;
3324 void *data;
06f2bb1e 3325 u8 *qc, *h_80211_src, *h_80211_dst;
a3e2f4b6 3326 const u8 *bssid;
6e0456b5
FF		 3327
3328 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3329 return false;
3330
3331 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3332 return true;
3333
f50d2ff8
CKC		 3334 if (!ieee80211_amsdu_realloc_pad(local, skb,
3335 sizeof(*amsdu_hdr) +
3336 local->hw.extra_tx_headroom))
6e0456b5
FF		 3337 return false;
3338
06f2bb1e
MB		 3339 data = skb_push(skb, sizeof(*amsdu_hdr));
3340 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3341 hdr = data;
3342 amsdu_hdr = data + hdr_len;
3343 /* h_80211_src/dst is addr* field within hdr */
3344 h_80211_src = data + fast_tx->sa_offs;
3345 h_80211_dst = data + fast_tx->da_offs;
6e0456b5 3346
06f2bb1e
MB		 3347 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3348 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3349 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
6e0456b5 3350
a3e2f4b6
MB		 3351 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3352 * fields needs to be changed to BSSID for A-MSDU frames depending
3353 * on FromDS/ToDS values.
3354 */
3355 switch (sdata->vif.type) {
3356 case NL80211_IFTYPE_STATION:
8a9be422 3357 bssid = sdata->vif.cfg.ap_addr;
a3e2f4b6
MB		 3358 break;
3359 case NL80211_IFTYPE_AP:
3360 case NL80211_IFTYPE_AP_VLAN:
3361 bssid = sdata->vif.addr;
3362 break;
3363 default:
3364 bssid = NULL;
3365 }
3366
3367 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3368 ether_addr_copy(h_80211_src, bssid);
3369
3370 if (bssid && ieee80211_has_tods(hdr->frame_control))
3371 ether_addr_copy(h_80211_dst, bssid);
3372
6e0456b5
FF		 3373 qc = ieee80211_get_qos_ctl(hdr);
3374 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3375
3376 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3377
3378 return true;
3379}
3380
3381static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3382 struct sta_info *sta,
3383 struct ieee80211_fast_tx *fast_tx,
d5edb9ae
FF		 3384 struct sk_buff *skb,
3385 const u8 *da, const u8 *sa)
6e0456b5
FF		 3386{
3387 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3388 struct fq *fq = &local->fq;
3389 struct fq_tin *tin;
3390 struct fq_flow *flow;
6e0456b5
FF		 3391 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3392 struct ieee80211_txq *txq = sta->sta.txq[tid];
3393 struct txq_info *txqi;
3394 struct sk_buff **frag_tail, *head;
3395 int subframe_len = skb->len - ETH_ALEN;
3396 u8 max_subframes = sta->sta.max_amsdu_subframes;
3397 int max_frags = local->hw.max_tx_fragments;
4c51541d 3398 int max_amsdu_len = sta->sta.cur->max_amsdu_len;
eb9b64e3 3399 int orig_truesize;
f2af2df8 3400 u32 flow_idx;
6e0456b5
FF		 3401 __be16 len;
3402 void *data;
3403 bool ret = false;
fa962b92 3404 unsigned int orig_len;
66eb02d8 3405 int n = 2, nfrags, pad = 0;
166ac9d5 3406 u16 hdrlen;
6e0456b5
FF		 3407
3408 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3409 return false;
3410
4f2e3eb6
RL		 3411 if (sdata->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED)
3412 return false;
3413
d5edb9ae
FF		 3414 if (ieee80211_vif_is_mesh(&sdata->vif))
3415 return false;
3416
344f8e00
SS		 3417 if (skb_is_gso(skb))
3418 return false;
3419
6e0456b5
FF		 3420 if (!txq)
3421 return false;
3422
3423 txqi = to_txq_info(txq);
3424 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3425 return false;
3426
4c51541d 3427 if (sta->sta.cur->max_rc_amsdu_len)
6e0456b5 3428 max_amsdu_len = min_t(int, max_amsdu_len,
4c51541d 3429 sta->sta.cur->max_rc_amsdu_len);
6e0456b5 3430
4c51541d 3431 if (sta->sta.cur->max_tid_amsdu_len[tid])
edba6bda 3432 max_amsdu_len = min_t(int, max_amsdu_len,
4c51541d 3433 sta->sta.cur->max_tid_amsdu_len[tid]);
edba6bda 3434
f2af2df8
FF		 3435 flow_idx = fq_flow_idx(fq, skb);
3436
fa962b92 3437 spin_lock_bh(&fq->lock);
6e0456b5 3438
fa962b92
MK		 3439 /* TODO: Ideally aggregation should be done on dequeue to remain
3440 * responsive to environment changes.
3441 */
3442
3443 tin = &txqi->tin;
bf9009bf 3444 flow = fq_flow_classify(fq, tin, flow_idx, skb);
fa962b92 3445 head = skb_peek_tail(&flow->queue);
344f8e00 3446 if (!head || skb_is_gso(head))
6e0456b5
FF		 3447 goto out;
3448
eb9b64e3 3449 orig_truesize = head->truesize;
fa962b92
MK		 3450 orig_len = head->len;
3451
6e0456b5
FF		 3452 if (skb->len + head->len > max_amsdu_len)
3453 goto out;
3454
6e0456b5
FF		 3455 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3456 nfrags += 1 + skb_shinfo(head)->nr_frags;
3457 frag_tail = &skb_shinfo(head)->frag_list;
3458 while (*frag_tail) {
3459 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3460 frag_tail = &(*frag_tail)->next;
3461 n++;
3462 }
3463
3464 if (max_subframes && n > max_subframes)
3465 goto out;
3466
3467 if (max_frags && nfrags > max_frags)
3468 goto out;
9739fe29
SS		 3469
3470 if (!drv_can_aggregate_in_amsdu(local, head, skb))
3471 goto out;
6e0456b5 3472
1eb50790 3473 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
6e0456b5
FF		 3474 goto out;
3475
fe94bac6
CKC		 3476 /* If n == 2, the "while (*frag_tail)" loop above didn't execute
3477 * and frag_tail should be &skb_shinfo(head)->frag_list.
3478 * However, ieee80211_amsdu_prepare_head() can reallocate it.
3479 * Reload frag_tail to have it pointing to the correct place.
3480 */
3481 if (n == 2)
3482 frag_tail = &skb_shinfo(head)->frag_list;
3483
166ac9d5
SS		 3484 /*
3485 * Pad out the previous subframe to a multiple of 4 by adding the
3486 * padding to the next one, that's being added. Note that head->len
3487 * is the length of the full A-MSDU, but that works since each time
3488 * we add a new subframe we pad out the previous one to a multiple
3489 * of 4 and thus it no longer matters in the next round.
3490 */
3491 hdrlen = fast_tx->hdr_len - sizeof(rfc1042_header);
3492 if ((head->len - hdrlen) & 3)
3493 pad = 4 - ((head->len - hdrlen) & 3);
3494
3495 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) +
3496 2 + pad))
aa58acf3 3497 goto out_recalc;
6e0456b5
FF		 3498
3499 ret = true;
3500 data = skb_push(skb, ETH_ALEN + 2);
d5edb9ae
FF		 3501 ether_addr_copy(data, da);
3502 ether_addr_copy(data + ETH_ALEN, sa);
6e0456b5
FF		 3503
3504 data += 2 * ETH_ALEN;
3505 len = cpu_to_be16(subframe_len);
3506 memcpy(data, &len, 2);
3507 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3508
166ac9d5
SS		 3509 memset(skb_push(skb, pad), 0, pad);
3510
6e0456b5
FF		 3511 head->len += skb->len;
3512 head->data_len += skb->len;
3513 *frag_tail = skb;
3514
aa58acf3 3515out_recalc:
eb9b64e3 3516 fq->memory_usage += head->truesize - orig_truesize;
aa58acf3
JB		 3517 if (head->len != orig_len) {
3518 flow->backlog += head->len - orig_len;
3519 tin->backlog_bytes += head->len - orig_len;
aa58acf3 3520 }
6e0456b5 3521out:
fa962b92 3522 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3523
3524 return ret;
3525}
3526
bb42f2d1
THJ		 3527/*
3528 * Can be called while the sta lock is held. Anything that can cause packets to
3529 * be generated will cause deadlock!
3530 */
03c3911d
RL		 3531static ieee80211_tx_result
3532ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3533 struct sta_info *sta, u8 pn_offs,
3534 struct ieee80211_key *key,
3535 struct ieee80211_tx_data *tx)
bb42f2d1 3536{
03c3911d 3537 struct sk_buff *skb = tx->skb;
bb42f2d1
THJ		 3538 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3539 struct ieee80211_hdr *hdr = (void *)skb->data;
3540 u8 tid = IEEE80211_NUM_TIDS;
3541
03c3911d
RL		 3542 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL) &&
3543 ieee80211_tx_h_rate_ctrl(tx) != TX_CONTINUE)
3544 return TX_DROP;
3545
bb42f2d1
THJ		 3546 if (key)
3547 info->control.hw_key = &key->conf;
3548
36ec144f 3549 dev_sw_netstats_tx_add(skb->dev, 1, skb->len);
bb42f2d1
THJ		 3550
3551 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3552 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
bb42f2d1
THJ		 3553 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3554 } else {
3555 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3556 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3557 sdata->sequence_number += 0x10;
3558 }
3559
3560 if (skb_shinfo(skb)->gso_size)
046d2e7c 3561 sta->deflink.tx_stats.msdu[tid] +=
bb42f2d1
THJ		 3562 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3563 else
046d2e7c 3564 sta->deflink.tx_stats.msdu[tid]++;
bb42f2d1
THJ		 3565
3566 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3567
3568 /* statistics normally done by ieee80211_tx_h_stats (but that
3569 * has to consider fragmentation, so is more complex)
3570 */
046d2e7c
S		 3571 sta->deflink.tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3572 sta->deflink.tx_stats.packets[skb_get_queue_mapping(skb)]++;
bb42f2d1
THJ		 3573
3574 if (pn_offs) {
3575 u64 pn;
3576 u8 *crypto_hdr = skb->data + pn_offs;
3577
3578 switch (key->conf.cipher) {
3579 case WLAN_CIPHER_SUITE_CCMP:
3580 case WLAN_CIPHER_SUITE_CCMP_256:
3581 case WLAN_CIPHER_SUITE_GCMP:
3582 case WLAN_CIPHER_SUITE_GCMP_256:
3583 pn = atomic64_inc_return(&key->conf.tx_pn);
3584 crypto_hdr[0] = pn;
3585 crypto_hdr[1] = pn >> 8;
96fc6efb 3586 crypto_hdr[3] = 0x20 | (key->conf.keyidx << 6);
bb42f2d1
THJ		 3587 crypto_hdr[4] = pn >> 16;
3588 crypto_hdr[5] = pn >> 24;
3589 crypto_hdr[6] = pn >> 32;
3590 crypto_hdr[7] = pn >> 40;
3591 break;
3592 }
3593 }
03c3911d
RL		 3594
3595 return TX_CONTINUE;
bb42f2d1
THJ		 3596}
3597
7d360f60
FF		 3598static netdev_features_t
3599ieee80211_sdata_netdev_features(struct ieee80211_sub_if_data *sdata)
17c18bf8 3600{
7d360f60
FF		 3601 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
3602 return sdata->vif.netdev_features;
17c18bf8 3603
7d360f60
FF		 3604 if (!sdata->bss)
3605 return 0;
17c18bf8 3606
7d360f60
FF		 3607 sdata = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
3608 return sdata->vif.netdev_features;
3609}
17c18bf8 3610
7d360f60
FF		 3611static struct sk_buff *
3612ieee80211_tx_skb_fixup(struct sk_buff *skb, netdev_features_t features)
3613{
3614 if (skb_is_gso(skb)) {
3615 struct sk_buff *segs;
17c18bf8 3616
7d360f60
FF		 3617 segs = skb_gso_segment(skb, features);
3618 if (!segs)
3619 return skb;
3620 if (IS_ERR(segs))
3621 goto free;
3622
3623 consume_skb(skb);
3624 return segs;
17c18bf8
JB		 3625 }
3626
7d360f60
FF		 3627 if (skb_needs_linearize(skb, features) && __skb_linearize(skb))
3628 goto free;
3629
3630 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3631 int ofs = skb_checksum_start_offset(skb);
3632
3633 if (skb->encapsulation)
3634 skb_set_inner_transport_header(skb, ofs);
3635 else
3636 skb_set_transport_header(skb, ofs);
3637
3638 if (skb_csum_hwoffload_help(skb, features))
3639 goto free;
3640 }
3641
3642 skb_mark_not_on_list(skb);
3643 return skb;
3644
3645free:
3646 kfree_skb(skb);
3647 return NULL;
3648}
3649
d5edb9ae
FF		 3650void __ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3651 struct sta_info *sta,
3652 struct ieee80211_fast_tx *fast_tx,
3653 struct sk_buff *skb, bool ampdu,
3654 const u8 *da, const u8 *sa)
7d360f60
FF		 3655{
3656 struct ieee80211_local *local = sdata->local;
3657 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3658 struct ieee80211_tx_info *info;
3659 struct ieee80211_tx_data tx;
3660 ieee80211_tx_result r;
3661 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3662 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
17c18bf8 3663
a4926abb
RL		 3664 skb = skb_share_check(skb, GFP_ATOMIC);
3665 if (unlikely(!skb))
7d360f60 3666 return;
17c18bf8 3667
6e0456b5 3668 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
d5edb9ae 3669 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb, da, sa))
7d360f60 3670 return;
6e0456b5 3671
17c18bf8
JB		 3672 /* will not be crypto-handled beyond what we do here, so use false
3673 * as the may-encrypt argument for the resize to not account for
3674 * more room than we already have in 'extra_head'
3675 */
3676 if (unlikely(ieee80211_skb_resize(sdata, skb,
3677 max_t(int, extra_head + hw_headroom -
3678 skb_headroom(skb), 0),
7d360f60
FF		 3679 ENCRYPT_NO)))
3680 goto free;
17c18bf8 3681
d58ff351 3682 hdr = skb_push(skb, extra_head);
17c18bf8 3683 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
d5edb9ae
FF		 3684 memcpy(skb->data + fast_tx->da_offs, da, ETH_ALEN);
3685 memcpy(skb->data + fast_tx->sa_offs, sa, ETH_ALEN);
17c18bf8 3686
35f432a0 3687 info = IEEE80211_SKB_CB(skb);
17c18bf8
JB		 3688 memset(info, 0, sizeof(*info));
3689 info->band = fast_tx->band;
3690 info->control.vif = &sdata->vif;
3691 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
592234e9 3692 IEEE80211_TX_CTL_DONTFRAG;
69d41b5a
JB		 3693 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT |
3694 u32_encode_bits(IEEE80211_LINK_UNSPECIFIED,
3695 IEEE80211_TX_CTRL_MLO_LINK);
17c18bf8 3696
276d9e82
JN		 3697#ifdef CONFIG_MAC80211_DEBUGFS
3698 if (local->force_tx_status)
3699 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
3700#endif
3701
a786f96d 3702 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
d5edb9ae
FF		 3703 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3704
a786f96d
FF		 3705 *ieee80211_get_qos_ctl(hdr) = tid;
3706 }
3707
17c18bf8
JB		 3708 __skb_queue_head_init(&tx.skbs);
3709
3710 tx.flags = IEEE80211_TX_UNICAST;
3711 tx.local = local;
3712 tx.sdata = sdata;
3713 tx.sta = sta;
3714 tx.key = fast_tx->key;
3715
bb42f2d1 3716 if (ieee80211_queue_skb(local, sdata, sta, skb))
7d360f60 3717 return;
17c18bf8 3718
03c3911d
RL		 3719 tx.skb = skb;
3720 r = ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3721 fast_tx->key, &tx);
3722 tx.skb = NULL;
7d360f60
FF		 3723 if (r == TX_DROP)
3724 goto free;
17c18bf8
JB		 3725
3726 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3727 sdata = container_of(sdata->bss,
3728 struct ieee80211_sub_if_data, u.ap);
3729
3730 __skb_queue_tail(&tx.skbs, skb);
4fd0328d 3731 ieee80211_tx_frags(local, &sdata->vif, sta, &tx.skbs, false);
7d360f60
FF		 3732 return;
3733
3734free:
3735 kfree_skb(skb);
3736}
3737
3738static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
3739 struct sta_info *sta,
3740 struct ieee80211_fast_tx *fast_tx,
3741 struct sk_buff *skb)
3742{
3743 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3744 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3745 struct tid_ampdu_tx *tid_tx = NULL;
3746 struct sk_buff *next;
d5edb9ae 3747 struct ethhdr eth;
7d360f60
FF		 3748 u8 tid = IEEE80211_NUM_TIDS;
3749
3750 /* control port protocol needs a lot of special handling */
3751 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3752 return false;
3753
3754 /* only RFC 1042 SNAP */
3755 if (ethertype < ETH_P_802_3_MIN)
3756 return false;
3757
3758 /* don't handle TX status request here either */
d7500fbf 3759 if (sk_requests_wifi_status(skb->sk))
7d360f60
FF		 3760 return false;
3761
3762 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3763 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3764 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
3765 if (tid_tx) {
3766 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3767 return false;
3768 if (tid_tx->timeout)
3769 tid_tx->last_tx = jiffies;
3770 }
3771 }
3772
d5edb9ae
FF		 3773 memcpy(&eth, skb->data, ETH_HLEN - 2);
3774
7d360f60
FF		 3775 /* after this point (skb is modified) we cannot return false */
3776 skb = ieee80211_tx_skb_fixup(skb, ieee80211_sdata_netdev_features(sdata));
3777 if (!skb)
3778 return true;
3779
3780 skb_list_walk_safe(skb, skb, next) {
3781 skb_mark_not_on_list(skb);
d5edb9ae
FF		 3782 __ieee80211_xmit_fast(sdata, sta, fast_tx, skb, tid_tx,
3783 eth.h_dest, eth.h_source);
7d360f60
FF		 3784 }
3785
17c18bf8
JB		 3786 return true;
3787}
3788
e0e2efff
THJ		 3789struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3790 struct ieee80211_txq *txq)
3791{
3792 struct ieee80211_local *local = hw_to_local(hw);
3793 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3794 struct ieee80211_hdr *hdr;
3795 struct sk_buff *skb = NULL;
3796 struct fq *fq = &local->fq;
3797 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3798 struct ieee80211_tx_info *info;
3799 struct ieee80211_tx_data tx;
3800 ieee80211_tx_result r;
21a5d4c3 3801 struct ieee80211_vif *vif = txq->vif;
4444bc21 3802 int q = vif->hw_queue[txq->ac];
ef6e1997 3803 unsigned long flags;
4444bc21 3804 bool q_stopped;
e0e2efff 3805
fb0e76ab
ES		 3806 WARN_ON_ONCE(softirq_count() == 0);
3807
7a89233a
THJ		 3808 if (!ieee80211_txq_airtime_check(hw, txq))
3809 return NULL;
3810
ded4698b 3811begin:
ef6e1997 3812 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4444bc21 3813 q_stopped = local->queue_stop_reasons[q];
ef6e1997 3814 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
e0e2efff 3815
4444bc21
AW		 3816 if (unlikely(q_stopped)) {
3817 /* mark for waking later */
3818 set_bit(IEEE80211_TXQ_DIRTY, &txqi->flags);
3819 return NULL;
3820 }
e0e2efff 3821
4444bc21
AW		 3822 spin_lock_bh(&fq->lock);
3823
bb42f2d1
THJ		 3824 /* Make sure fragments stay together. */
3825 skb = __skb_dequeue(&txqi->frags);
ca47b462
JB		 3826 if (unlikely(skb)) {
3827 if (!(IEEE80211_SKB_CB(skb)->control.flags &
3828 IEEE80211_TX_INTCFL_NEED_TXPROCESSING))
3829 goto out;
3830 IEEE80211_SKB_CB(skb)->control.flags &=
3831 ~IEEE80211_TX_INTCFL_NEED_TXPROCESSING;
3832 } else {
592234e9
AW		 3833 if (unlikely(test_bit(IEEE80211_TXQ_STOP, &txqi->flags)))
3834 goto out;
3835
ca47b462
JB		 3836 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3837 }
bb42f2d1 3838
e0e2efff
THJ		 3839 if (!skb)
3840 goto out;
3841
ded4698b
FF		 3842 spin_unlock_bh(&fq->lock);
3843
e0e2efff 3844 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3845 info = IEEE80211_SKB_CB(skb);
3846
3847 memset(&tx, 0, sizeof(tx));
3848 __skb_queue_head_init(&tx.skbs);
3849 tx.local = local;
3850 tx.skb = skb;
3851 tx.sdata = vif_to_sdata(info->control.vif);
3852
804fc6a2 3853 if (txq->sta) {
bb42f2d1 3854 tx.sta = container_of(txq->sta, struct sta_info, sta);
ce2e1ca7
JM		 3855 /*
3856 * Drop unicast frames to unauthorised stations unless they are
804fc6a2 3857 * injected frames or EAPOL frames from the local station.
ce2e1ca7 3858 */
804fc6a2
MV		 3859 if (unlikely(!(info->flags & IEEE80211_TX_CTL_INJECTED) &&
3860 ieee80211_is_data(hdr->frame_control) &&
be8c827f 3861 !ieee80211_vif_is_mesh(&tx.sdata->vif) &&
ce2e1ca7
JM		 3862 tx.sdata->vif.type != NL80211_IFTYPE_OCB &&
3863 !is_multicast_ether_addr(hdr->addr1) &&
3864 !test_sta_flag(tx.sta, WLAN_STA_AUTHORIZED) &&
3865 (!(info->control.flags &
3866 IEEE80211_TX_CTRL_PORT_CTRL_PROTO) ||
3579f4c2
JB		 3867 !ieee80211_is_our_addr(tx.sdata, hdr->addr2,
3868 NULL)))) {
ce2e1ca7
JM		 3869 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
3870 ieee80211_free_txskb(&local->hw, skb);
3871 goto begin;
3872 }
3873 }
bb42f2d1
THJ		 3874
3875 /*
3876 * The key can be removed while the packet was queued, so need to call
3877 * this here to get the current key.
3878 */
3879 r = ieee80211_tx_h_select_key(&tx);
3880 if (r != TX_CONTINUE) {
3881 ieee80211_free_txskb(&local->hw, skb);
3882 goto begin;
3883 }
3884
c1f4c9ed 3885 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
592234e9
AW		 3886 info->flags |= (IEEE80211_TX_CTL_AMPDU |
3887 IEEE80211_TX_CTL_DONTFRAG);
c1f4c9ed 3888
3187ba0c
RL		 3889 if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
3890 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
3891 r = ieee80211_tx_h_rate_ctrl(&tx);
3892 if (r != TX_CONTINUE) {
3893 ieee80211_free_txskb(&local->hw, skb);
3894 goto begin;
3895 }
3896 }
50ff477a 3897 goto encap_out;
3187ba0c 3898 }
50ff477a 3899
bb42f2d1 3900 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3901 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3902 sta);
bb42f2d1 3903 u8 pn_offs = 0;
e0e2efff 3904
bb42f2d1
THJ		 3905 if (tx.key &&
3906 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3907 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3908
03c3911d
RL		 3909 r = ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3910 tx.key, &tx);
3911 if (r != TX_CONTINUE) {
3912 ieee80211_free_txskb(&local->hw, skb);
3913 goto begin;
3914 }
bb42f2d1
THJ		 3915 } else {
3916 if (invoke_tx_handlers_late(&tx))
3917 goto begin;
3918
3919 skb = __skb_dequeue(&tx.skbs);
c98d8836 3920 info = IEEE80211_SKB_CB(skb);
bb42f2d1 3921
ded4698b
FF		 3922 if (!skb_queue_empty(&tx.skbs)) {
3923 spin_lock_bh(&fq->lock);
bb42f2d1 3924 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
ded4698b
FF		 3925 spin_unlock_bh(&fq->lock);
3926 }
e0e2efff
THJ		 3927 }
3928
233e98dc 3929 if (skb_has_frag_list(skb) &&
1e1430d5
JB		 3930 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3931 if (skb_linearize(skb)) {
3932 ieee80211_free_txskb(&local->hw, skb);
3933 goto begin;
3934 }
3935 }
3936
53168215
JB		 3937 switch (tx.sdata->vif.type) {
3938 case NL80211_IFTYPE_MONITOR:
9d40f7e3
FF		 3939 if ((tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) ||
3940 ieee80211_hw_check(&local->hw, NO_VIRTUAL_MONITOR)) {
53168215
JB		 3941 vif = &tx.sdata->vif;
3942 break;
3943 }
3944 tx.sdata = rcu_dereference(local->monitor_sdata);
8f4fa087
JB		 3945 if (tx.sdata &&
3946 ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF)) {
53168215
JB		 3947 vif = &tx.sdata->vif;
3948 info->hw_queue =
3949 vif->hw_queue[skb_get_queue_mapping(skb)];
3950 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3951 ieee80211_free_txskb(&local->hw, skb);
3952 goto begin;
3953 } else {
91cdcbbc
JB		 3954 info->control.vif = NULL;
3955 return skb;
53168215
JB		 3956 }
3957 break;
3958 case NL80211_IFTYPE_AP_VLAN:
3959 tx.sdata = container_of(tx.sdata->bss,
3960 struct ieee80211_sub_if_data, u.ap);
fc0561dc 3961 fallthrough;
53168215
JB		 3962 default:
3963 vif = &tx.sdata->vif;
3964 break;
3965 }
3966
50ff477a 3967encap_out:
c98d8836 3968 info->control.vif = vif;
7a89233a 3969
51d3cfaf 3970 if (tx.sta &&
ca98c47d 3971 wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL)) {
3ff901cb 3972 bool ampdu = txq->ac != IEEE80211_AC_VO;
7a89233a
THJ		 3973 u32 airtime;
3974
3975 airtime = ieee80211_calc_expected_tx_airtime(hw, vif, txq->sta,
3ff901cb 3976 skb->len, ampdu);
7a89233a
THJ		 3977 if (airtime) {
3978 airtime = ieee80211_info_set_tx_time_est(info, airtime);
3979 ieee80211_sta_update_pending_airtime(local, tx.sta,
3980 txq->ac,
3981 airtime,
3982 false);
3983 }
3984 }
3985
ded4698b 3986 return skb;
21a5d4c3 3987
e0e2efff
THJ		 3988out:
3989 spin_unlock_bh(&fq->lock);
3990
e0e2efff
THJ		 3991 return skb;
3992}
3993EXPORT_SYMBOL(ieee80211_tx_dequeue);
3994
9c1be3cd
FF		 3995static inline s32 ieee80211_sta_deficit(struct sta_info *sta, u8 ac)
3996{
3997 struct airtime_info *air_info = &sta->airtime[ac];
3998
3999 return air_info->deficit - atomic_read(&air_info->aql_tx_pending);
4000}
4001
8ccc0702
FF		 4002static void
4003ieee80211_txq_set_active(struct txq_info *txqi)
4004{
4005 struct sta_info *sta;
4006
4007 if (!txqi->txq.sta)
4008 return;
4009
4010 sta = container_of(txqi->txq.sta, struct sta_info, sta);
ea855f0b 4011 sta->airtime[txqi->txq.ac].last_active = jiffies;
8ccc0702
FF		 4012}
4013
4014static bool
4015ieee80211_txq_keep_active(struct txq_info *txqi)
4016{
4017 struct sta_info *sta;
8ccc0702
FF		 4018
4019 if (!txqi->txq.sta)
4020 return false;
4021
4022 sta = container_of(txqi->txq.sta, struct sta_info, sta);
4023 if (ieee80211_sta_deficit(sta, txqi->txq.ac) >= 0)
4024 return false;
4025
ea855f0b 4026 return ieee80211_sta_keep_active(sta, txqi->txq.ac);
8ccc0702
FF		 4027}
4028
18667600
THJ		 4029struct ieee80211_txq *ieee80211_next_txq(struct ieee80211_hw *hw, u8 ac)
4030{
4031 struct ieee80211_local *local = hw_to_local(hw);
5b989c18 4032 struct ieee80211_txq *ret = NULL;
942741da
FF		 4033 struct txq_info *txqi = NULL, *head = NULL;
4034 bool found_eligible_txq = false;
18667600 4035
942741da 4036 spin_lock_bh(&local->active_txq_lock[ac]);
18667600 4037
8e4bac06
FF		 4038 if (!local->schedule_round[ac])
4039 goto out;
4040
942741da
FF		 4041 begin:
4042 txqi = list_first_entry_or_null(&local->active_txqs[ac],
4043 struct txq_info,
4044 schedule_order);
4045 if (!txqi)
2433647b
THJ		 4046 goto out;
4047
942741da
FF		 4048 if (txqi == head) {
4049 if (!found_eligible_txq)
4050 goto out;
4051 else
4052 found_eligible_txq = false;
2433647b 4053 }
3ace10f5 4054
942741da
FF		 4055 if (!head)
4056 head = txqi;
3ace10f5 4057
942741da
FF		 4058 if (txqi->txq.sta) {
4059 struct sta_info *sta = container_of(txqi->txq.sta,
4060 struct sta_info, sta);
4061 bool aql_check = ieee80211_txq_airtime_check(hw, &txqi->txq);
9c1be3cd 4062 s32 deficit = ieee80211_sta_deficit(sta, txqi->txq.ac);
2433647b 4063
942741da
FF		 4064 if (aql_check)
4065 found_eligible_txq = true;
2433647b 4066
942741da
FF		 4067 if (deficit < 0)
4068 sta->airtime[txqi->txq.ac].deficit +=
4069 sta->airtime_weight;
2433647b 4070
942741da
FF		 4071 if (deficit < 0 || !aql_check) {
4072 list_move_tail(&txqi->schedule_order,
4073 &local->active_txqs[txqi->txq.ac]);
4074 goto begin;
2433647b 4075 }
b4809e94
THJ		 4076 }
4077
942741da 4078 if (txqi->schedule_round == local->schedule_round[ac])
5b989c18 4079 goto out;
18667600 4080
942741da
FF		 4081 list_del_init(&txqi->schedule_order);
4082 txqi->schedule_round = local->schedule_round[ac];
4083 ret = &txqi->txq;
5b989c18
FF		 4084
4085out:
942741da
FF		 4086 spin_unlock_bh(&local->active_txq_lock[ac]);
4087 return ret;
390298e8 4088}
942741da 4089EXPORT_SYMBOL(ieee80211_next_txq);
2433647b 4090
942741da 4091void __ieee80211_schedule_txq(struct ieee80211_hw *hw,
2433647b 4092 struct ieee80211_txq *txq,
942741da 4093 bool force)
2433647b
THJ		 4094{
4095 struct ieee80211_local *local = hw_to_local(hw);
4096 struct txq_info *txqi = to_txq_info(txq);
8ccc0702 4097 bool has_queue;
2433647b 4098
942741da
FF		 4099 spin_lock_bh(&local->active_txq_lock[txq->ac]);
4100
8ccc0702 4101 has_queue = force || txq_has_queue(txq);
942741da 4102 if (list_empty(&txqi->schedule_order) &&
8ccc0702 4103 (has_queue || ieee80211_txq_keep_active(txqi))) {
942741da
FF		 4104 /* If airtime accounting is active, always enqueue STAs at the
4105 * head of the list to ensure that they only get moved to the
4106 * back by the airtime DRR scheduler once they have a negative
4107 * deficit. A station that already has a negative deficit will
4108 * get immediately moved to the back of the list on the next
4109 * call to ieee80211_next_txq().
4110 */
8ccc0702 4111 if (txqi->txq.sta && local->airtime_flags && has_queue &&
942741da
FF		 4112 wiphy_ext_feature_isset(local->hw.wiphy,
4113 NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
4114 list_add(&txqi->schedule_order,
4115 &local->active_txqs[txq->ac]);
4116 else
4117 list_add_tail(&txqi->schedule_order,
4118 &local->active_txqs[txq->ac]);
8ccc0702
FF		 4119 if (has_queue)
4120 ieee80211_txq_set_active(txqi);
942741da 4121 }
2433647b 4122
942741da 4123 spin_unlock_bh(&local->active_txq_lock[txq->ac]);
2433647b 4124}
942741da 4125EXPORT_SYMBOL(__ieee80211_schedule_txq);
390298e8 4126
e908435e
LB		 4127DEFINE_STATIC_KEY_FALSE(aql_disable);
4128
3ace10f5
KY		 4129bool ieee80211_txq_airtime_check(struct ieee80211_hw *hw,
4130 struct ieee80211_txq *txq)
4131{
942741da 4132 struct sta_info *sta;
3ace10f5
KY		 4133 struct ieee80211_local *local = hw_to_local(hw);
4134
911bde0f 4135 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
3ace10f5
KY		 4136 return true;
4137
e908435e
LB		 4138 if (static_branch_unlikely(&aql_disable))
4139 return true;
4140
3ace10f5
KY		 4141 if (!txq->sta)
4142 return true;
4143
73bc9e0a
JB		 4144 if (unlikely(txq->tid == IEEE80211_NUM_TIDS))
4145 return true;
4146
942741da
FF		 4147 sta = container_of(txq->sta, struct sta_info, sta);
4148 if (atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
4149 sta->airtime[txq->ac].aql_limit_low)
3ace10f5
KY		 4150 return true;
4151
4152 if (atomic_read(&local->aql_total_pending_airtime) <
4153 local->aql_threshold &&
942741da
FF		 4154 atomic_read(&sta->airtime[txq->ac].aql_tx_pending) <
4155 sta->airtime[txq->ac].aql_limit_high)
3ace10f5
KY		 4156 return true;
4157
4158 return false;
4159}
4160EXPORT_SYMBOL(ieee80211_txq_airtime_check);
4161
8e4bac06
FF		 4162static bool
4163ieee80211_txq_schedule_airtime_check(struct ieee80211_local *local, u8 ac)
4164{
4165 unsigned int num_txq = 0;
4166 struct txq_info *txq;
4167 u32 aql_limit;
4168
4169 if (!wiphy_ext_feature_isset(local->hw.wiphy, NL80211_EXT_FEATURE_AQL))
4170 return true;
4171
4172 list_for_each_entry(txq, &local->active_txqs[ac], schedule_order)
4173 num_txq++;
4174
4175 aql_limit = (num_txq - 1) * local->aql_txq_limit_low[ac] / 2 +
4176 local->aql_txq_limit_high[ac];
4177
4178 return atomic_read(&local->aql_ac_pending_airtime[ac]) < aql_limit;
4179}
4180
b4809e94
THJ		 4181bool ieee80211_txq_may_transmit(struct ieee80211_hw *hw,
4182 struct ieee80211_txq *txq)
4183{
4184 struct ieee80211_local *local = hw_to_local(hw);
942741da
FF		 4185 struct txq_info *iter, *tmp, *txqi = to_txq_info(txq);
4186 struct sta_info *sta;
4187 u8 ac = txq->ac;
b4809e94 4188
942741da 4189 spin_lock_bh(&local->active_txq_lock[ac]);
b4809e94 4190
942741da
FF		 4191 if (!txqi->txq.sta)
4192 goto out;
2433647b 4193
942741da 4194 if (list_empty(&txqi->schedule_order))
b4809e94
THJ		 4195 goto out;
4196
8e4bac06
FF		 4197 if (!ieee80211_txq_schedule_airtime_check(local, ac))
4198 goto out;
4199
942741da
FF		 4200 list_for_each_entry_safe(iter, tmp, &local->active_txqs[ac],
4201 schedule_order) {
4202 if (iter == txqi)
4203 break;
b4809e94 4204
942741da
FF		 4205 if (!iter->txq.sta) {
4206 list_move_tail(&iter->schedule_order,
4207 &local->active_txqs[ac]);
4208 continue;
4209 }
4210 sta = container_of(iter->txq.sta, struct sta_info, sta);
9c1be3cd 4211 if (ieee80211_sta_deficit(sta, ac) < 0)
942741da
FF		 4212 sta->airtime[ac].deficit += sta->airtime_weight;
4213 list_move_tail(&iter->schedule_order, &local->active_txqs[ac]);
b4809e94
THJ		 4214 }
4215
942741da
FF		 4216 sta = container_of(txqi->txq.sta, struct sta_info, sta);
4217 if (sta->airtime[ac].deficit >= 0)
4218 goto out;
4219
4220 sta->airtime[ac].deficit += sta->airtime_weight;
4221 list_move_tail(&txqi->schedule_order, &local->active_txqs[ac]);
4222 spin_unlock_bh(&local->active_txq_lock[ac]);
b4809e94 4223
942741da 4224 return false;
b4809e94 4225out:
942741da
FF		 4226 if (!list_empty(&txqi->schedule_order))
4227 list_del_init(&txqi->schedule_order);
4228 spin_unlock_bh(&local->active_txq_lock[ac]);
4229
4230 return true;
b4809e94
THJ		 4231}
4232EXPORT_SYMBOL(ieee80211_txq_may_transmit);
4233
18667600 4234void ieee80211_txq_schedule_start(struct ieee80211_hw *hw, u8 ac)
18667600
THJ		 4235{
4236 struct ieee80211_local *local = hw_to_local(hw);
4237
942741da 4238 spin_lock_bh(&local->active_txq_lock[ac]);
8e4bac06
FF		 4239
4240 if (ieee80211_txq_schedule_airtime_check(local, ac)) {
4241 local->schedule_round[ac]++;
4242 if (!local->schedule_round[ac])
4243 local->schedule_round[ac]++;
4244 } else {
4245 local->schedule_round[ac] = 0;
4246 }
4247
942741da 4248 spin_unlock_bh(&local->active_txq_lock[ac]);
18667600 4249}
5b989c18 4250EXPORT_SYMBOL(ieee80211_txq_schedule_start);
18667600 4251
4c9451ed
JB		 4252void __ieee80211_subif_start_xmit(struct sk_buff *skb,
4253 struct net_device *dev,
06016772 4254 u32 info_flags,
a7528198
MT		 4255 u32 ctrl_flags,
4256 u64 *cookie)
4c9451ed
JB		 4257{
4258 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1974da8b 4259 struct ieee80211_local *local = sdata->local;
97ffe757 4260 struct sta_info *sta;
80616c0d 4261 struct sk_buff *next;
30f6cf96 4262 int len = skb->len;
4c9451ed 4263
c95014e1 4264 if (unlikely(!ieee80211_sdata_running(sdata) || skb->len < ETH_HLEN)) {
4c9451ed
JB		 4265 kfree_skb(skb);
4266 return;
4267 }
4268
d5edb9ae
FF		 4269 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
4270
4c9451ed 4271 rcu_read_lock();
e2ebc74d 4272
d5edb9ae
FF		 4273 if (ieee80211_vif_is_mesh(&sdata->vif) &&
4274 ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT) &&
4275 ieee80211_mesh_xmit_fast(sdata, skb, ctrl_flags))
4276 goto out;
4277
2d981fdd
JB		 4278 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
4279 goto out_free;
4c9451ed 4280
1974da8b
FF		 4281 if (IS_ERR(sta))
4282 sta = NULL;
4283
107395f9 4284 skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, sta, skb));
08a46c64
FF		 4285 ieee80211_aggr_check(sdata, sta, skb);
4286
1974da8b 4287 if (sta) {
17c18bf8
JB		 4288 struct ieee80211_fast_tx *fast_tx;
4289
4290 fast_tx = rcu_dereference(sta->fast_tx);
4291
4292 if (fast_tx &&
bb42f2d1 4293 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 4294 goto out;
4295 }
4296
7d360f60
FF		 4297 /* the frame could be fragmented, software-encrypted, and other
4298 * things so we cannot really handle checksum or GSO offload.
4299 * fix it up in software before we handle anything else.
4300 */
4301 skb = ieee80211_tx_skb_fixup(skb, 0);
4302 if (!skb) {
4303 len = 0;
4304 goto out;
2d981fdd
JB		 4305 }
4306
9f3ef3d7
JD		 4307 skb_list_walk_safe(skb, skb, next) {
4308 skb_mark_not_on_list(skb);
80616c0d 4309
5af7fef3
MT		 4310 if (skb->protocol == sdata->control_port_protocol)
4311 ctrl_flags |= IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
4312
06016772 4313 skb = ieee80211_build_hdr(sdata, skb, info_flags,
a7528198 4314 sta, ctrl_flags, cookie);
9f3ef3d7
JD		 4315 if (IS_ERR(skb)) {
4316 kfree_skb_list(next);
80616c0d 4317 goto out;
9f3ef3d7 4318 }
e2ebc74d 4319
36ec144f 4320 dev_sw_netstats_tx_add(dev, 1, skb->len);
80616c0d 4321
08aca29a 4322 ieee80211_xmit(sdata, sta, skb);
80616c0d 4323 }
2d981fdd
JB		 4324 goto out;
4325 out_free:
4326 kfree_skb(skb);
30f6cf96 4327 len = 0;
4c9451ed 4328 out:
30f6cf96
FF		 4329 if (len)
4330 ieee80211_tpt_led_trig_tx(local, len);
55de908a 4331 rcu_read_unlock();
e2ebc74d
JB		 4332}
4333
ebceec86
MB		 4334static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
4335{
4336 struct ethhdr *eth;
4337 int err;
4338
4339 err = skb_ensure_writable(skb, ETH_HLEN);
4340 if (unlikely(err))
4341 return err;
4342
4343 eth = (void *)skb->data;
4344 ether_addr_copy(eth->h_dest, sta->sta.addr);
4345
4346 return 0;
4347}
4348
4349static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
4350 struct net_device *dev)
4351{
4352 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4353 const struct ethhdr *eth = (void *)skb->data;
4354 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
4355 __be16 ethertype;
4356
ebceec86
MB		 4357 switch (sdata->vif.type) {
4358 case NL80211_IFTYPE_AP_VLAN:
4359 if (sdata->u.vlan.sta)
4360 return false;
4361 if (sdata->wdev.use_4addr)
4362 return false;
fc0561dc 4363 fallthrough;
ebceec86
MB		 4364 case NL80211_IFTYPE_AP:
4365 /* check runtime toggle for this bss */
4366 if (!sdata->bss->multicast_to_unicast)
4367 return false;
4368 break;
4369 default:
4370 return false;
4371 }
4372
4373 /* multicast to unicast conversion only for some payload */
4374 ethertype = eth->h_proto;
4375 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
4376 ethertype = ethvlan->h_vlan_encapsulated_proto;
4377 switch (ethertype) {
4378 case htons(ETH_P_ARP):
4379 case htons(ETH_P_IP):
4380 case htons(ETH_P_IPV6):
4381 break;
4382 default:
4383 return false;
4384 }
4385
4386 return true;
4387}
4388
4389static void
4390ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
4391 struct sk_buff_head *queue)
4392{
4393 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4394 struct ieee80211_local *local = sdata->local;
4395 const struct ethhdr *eth = (struct ethhdr *)skb->data;
4396 struct sta_info *sta, *first = NULL;
4397 struct sk_buff *cloned_skb;
4398
4399 rcu_read_lock();
4400
4401 list_for_each_entry_rcu(sta, &local->sta_list, list) {
4402 if (sdata != sta->sdata)
4403 /* AP-VLAN mismatch */
4404 continue;
4405 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
4406 /* do not send back to source */
4407 continue;
4408 if (!first) {
4409 first = sta;
4410 continue;
4411 }
4412 cloned_skb = skb_clone(skb, GFP_ATOMIC);
4413 if (!cloned_skb)
4414 goto multicast;
4415 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
4416 dev_kfree_skb(cloned_skb);
4417 goto multicast;
4418 }
4419 __skb_queue_tail(queue, cloned_skb);
4420 }
4421
4422 if (likely(first)) {
4423 if (unlikely(ieee80211_change_da(skb, first)))
4424 goto multicast;
4425 __skb_queue_tail(queue, skb);
4426 } else {
4427 /* no STA connected, drop */
4428 kfree_skb(skb);
4429 skb = NULL;
4430 }
4431
4432 goto out;
4433multicast:
4434 __skb_queue_purge(queue);
4435 __skb_queue_tail(queue, skb);
4436out:
4437 rcu_read_unlock();
4438}
4439
963d0e8d
JB		 4440static void ieee80211_mlo_multicast_tx_one(struct ieee80211_sub_if_data *sdata,
4441 struct sk_buff *skb, u32 ctrl_flags,
4442 unsigned int link_id)
4443{
4444 struct sk_buff *out;
4445
4446 out = skb_copy(skb, GFP_ATOMIC);
4447 if (!out)
4448 return;
4449
4450 ctrl_flags |= u32_encode_bits(link_id, IEEE80211_TX_CTRL_MLO_LINK);
4451 __ieee80211_subif_start_xmit(out, sdata->dev, 0, ctrl_flags, NULL);
4452}
4453
4454static void ieee80211_mlo_multicast_tx(struct net_device *dev,
4455 struct sk_buff *skb)
4456{
4457 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
7b3b9ac8 4458 unsigned long links = sdata->vif.active_links;
963d0e8d
JB		 4459 unsigned int link;
4460 u32 ctrl_flags = IEEE80211_TX_CTRL_MCAST_MLO_FIRST_TX;
4461
4462 if (hweight16(links) == 1) {
cf08e29d 4463 ctrl_flags |= u32_encode_bits(__ffs(links),
963d0e8d
JB		 4464 IEEE80211_TX_CTRL_MLO_LINK);
4465
4466 __ieee80211_subif_start_xmit(skb, sdata->dev, 0, ctrl_flags,
4467 NULL);
4468 return;
4469 }
4470
4471 for_each_set_bit(link, &links, IEEE80211_MLD_MAX_NUM_LINKS) {
4472 ieee80211_mlo_multicast_tx_one(sdata, skb, ctrl_flags, link);
4473 ctrl_flags = 0;
4474 }
4475 kfree_skb(skb);
4476}
4477
4c9451ed
JB		 4478/**
4479 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
4480 * @skb: packet to be sent
4481 * @dev: incoming interface
4482 *
4483 * On failure skb will be freed.
cef71047
JB		 4484 *
4485 * Returns: the netdev TX status (but really only %NETDEV_TX_OK)
4c9451ed 4486 */
24d342c5
LK		 4487netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
4488 struct net_device *dev)
4489{
963d0e8d
JB		 4490 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4491 const struct ethhdr *eth = (void *)skb->data;
4492
4493 if (likely(!is_multicast_ether_addr(eth->h_dest)))
4494 goto normal;
4495
78085418
ZS		 4496 if (unlikely(!ieee80211_sdata_running(sdata))) {
4497 kfree_skb(skb);
4498 return NETDEV_TX_OK;
4499 }
4500
ebceec86
MB		 4501 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
4502 struct sk_buff_head queue;
4503
4504 __skb_queue_head_init(&queue);
4505 ieee80211_convert_to_unicast(skb, dev, &queue);
4506 while ((skb = __skb_dequeue(&queue)))
963d0e8d
JB		 4507 __ieee80211_subif_start_xmit(skb, dev, 0,
4508 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4509 NULL);
f1871abd 4510 } else if (ieee80211_vif_is_mld(&sdata->vif) &&
1a4a6a22
MS		 4511 ((sdata->vif.type == NL80211_IFTYPE_AP &&
4512 !ieee80211_hw_check(&sdata->local->hw, MLO_MCAST_MULTI_LINK_TX)) ||
4513 (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
4514 !sdata->wdev.use_4addr))) {
963d0e8d 4515 ieee80211_mlo_multicast_tx(dev, skb);
ebceec86 4516 } else {
963d0e8d
JB		 4517normal:
4518 __ieee80211_subif_start_xmit(skb, dev, 0,
4519 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4520 NULL);
ebceec86
MB		 4521 }
4522
24d342c5
LK		 4523 return NETDEV_TX_OK;
4524}
e2ebc74d 4525
7d360f60
FF		 4526
4527
4528static bool __ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4529 struct sk_buff *skb, struct sta_info *sta,
4530 bool txpending)
50ff477a
JC		 4531{
4532 struct ieee80211_local *local = sdata->local;
4533 struct ieee80211_tx_control control = {};
4534 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4535 struct ieee80211_sta *pubsta = NULL;
4536 unsigned long flags;
4537 int q = info->hw_queue;
4538
50ff477a
JC		 4539 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
4540
4541 if (local->queue_stop_reasons[q] ||
4542 (!txpending && !skb_queue_empty(&local->pending[q]))) {
4543 if (txpending)
4544 skb_queue_head(&local->pending[q], skb);
4545 else
4546 skb_queue_tail(&local->pending[q], skb);
4547
4548 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4549
4550 return false;
4551 }
4552
4553 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
4554
4555 if (sta && sta->uploaded)
4556 pubsta = &sta->sta;
4557
4558 control.sta = pubsta;
4559
4560 drv_tx(local, &control, skb);
4561
4562 return true;
4563}
4564
7d360f60
FF		 4565static bool ieee80211_tx_8023(struct ieee80211_sub_if_data *sdata,
4566 struct sk_buff *skb, struct sta_info *sta,
4567 bool txpending)
4568{
4569 struct ieee80211_local *local = sdata->local;
4570 struct sk_buff *next;
4571 bool ret = true;
4572
4573 if (ieee80211_queue_skb(local, sdata, sta, skb))
4574 return true;
4575
4576 skb_list_walk_safe(skb, skb, next) {
4577 skb_mark_not_on_list(skb);
4578 if (!__ieee80211_tx_8023(sdata, skb, sta, txpending))
4579 ret = false;
4580 }
4581
4582 return ret;
4583}
4584
50ff477a
JC		 4585static void ieee80211_8023_xmit(struct ieee80211_sub_if_data *sdata,
4586 struct net_device *dev, struct sta_info *sta,
6aea26ce 4587 struct ieee80211_key *key, struct sk_buff *skb)
50ff477a 4588{
a4926abb 4589 struct ieee80211_tx_info *info;
50ff477a 4590 struct ieee80211_local *local = sdata->local;
96ae9cd0 4591 struct tid_ampdu_tx *tid_tx;
7d360f60
FF		 4592 struct sk_buff *seg, *next;
4593 unsigned int skbs = 0, len = 0;
4594 u16 queue;
96ae9cd0 4595 u8 tid;
50ff477a 4596
7d360f60
FF		 4597 queue = ieee80211_select_queue(sdata, sta, skb);
4598 skb_set_queue_mapping(skb, queue);
5f8d69ea 4599
50ff477a
JC		 4600 if (unlikely(test_bit(SCAN_SW_SCANNING, &local->scanning)) &&
4601 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state))
4602 goto out_free;
4603
a4926abb
RL		 4604 skb = skb_share_check(skb, GFP_ATOMIC);
4605 if (unlikely(!skb))
4606 return;
4607
08a46c64
FF		 4608 ieee80211_aggr_check(sdata, sta, skb);
4609
aea6a3f0
FF		 4610 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
4611 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
4612 if (tid_tx) {
4613 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
4614 /* fall back to non-offload slow path */
963d0e8d
JB		 4615 __ieee80211_subif_start_xmit(skb, dev, 0,
4616 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC,
4617 NULL);
aea6a3f0 4618 return;
96ae9cd0 4619 }
aea6a3f0 4620
aea6a3f0
FF		 4621 if (tid_tx->timeout)
4622 tid_tx->last_tx = jiffies;
96ae9cd0
FF		 4623 }
4624
7d360f60
FF		 4625 skb = ieee80211_tx_skb_fixup(skb, ieee80211_sdata_netdev_features(sdata));
4626 if (!skb)
4627 return;
50ff477a 4628
7d360f60
FF		 4629 info = IEEE80211_SKB_CB(skb);
4630 memset(info, 0, sizeof(*info));
50ff477a 4631
7d360f60 4632 info->hw_queue = sdata->vif.hw_queue[queue];
50ff477a
JC		 4633
4634 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
4635 sdata = container_of(sdata->bss,
4636 struct ieee80211_sub_if_data, u.ap);
4637
cc20ff2c 4638 info->flags |= IEEE80211_TX_CTL_HW_80211_ENCAP;
50ff477a
JC		 4639 info->control.vif = &sdata->vif;
4640
ae045152
FF		 4641 if (key)
4642 info->control.hw_key = &key->conf;
4643
7d360f60
FF		 4644 skb_list_walk_safe(skb, seg, next) {
4645 skbs++;
4646 len += seg->len;
4647 if (seg != skb)
4648 memcpy(IEEE80211_SKB_CB(seg), info, sizeof(*info));
4649 }
4650
d7500fbf 4651 if (unlikely(sk_requests_wifi_status(skb->sk))) {
f498f6ab
JB		 4652 info->status_data = ieee80211_store_ack_skb(local, skb,
4653 &info->flags, NULL);
4654 if (info->status_data)
4655 info->status_data_idr = 1;
4656 }
7d360f60
FF		 4657
4658 dev_sw_netstats_tx_add(dev, skbs, len);
4659 sta->deflink.tx_stats.packets[queue] += skbs;
4660 sta->deflink.tx_stats.bytes[queue] += len;
4661
4662 ieee80211_tpt_led_trig_tx(local, len);
4663
30f6cf96 4664 ieee80211_tx_8023(sdata, skb, sta, false);
50ff477a
JC		 4665
4666 return;
4667
4668out_free:
4669 kfree_skb(skb);
4670}
4671
4672netdev_tx_t ieee80211_subif_start_xmit_8023(struct sk_buff *skb,
4673 struct net_device *dev)
4674{
4675 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
aea6a3f0 4676 struct ethhdr *ehdr = (struct ethhdr *)skb->data;
6aea26ce 4677 struct ieee80211_key *key;
50ff477a 4678 struct sta_info *sta;
50ff477a 4679
c95014e1 4680 if (unlikely(!ieee80211_sdata_running(sdata) || skb->len < ETH_HLEN)) {
50ff477a
JC		 4681 kfree_skb(skb);
4682 return NETDEV_TX_OK;
4683 }
4684
4685 rcu_read_lock();
4686
6aea26ce 4687 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
50ff477a 4688 kfree_skb(skb);
6aea26ce
FF		 4689 goto out;
4690 }
4691
4692 if (unlikely(IS_ERR_OR_NULL(sta) || !sta->uploaded ||
4693 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
b101dd2d
FF		 4694 sdata->control_port_protocol == ehdr->h_proto))
4695 goto skip_offload;
4696
4697 key = rcu_dereference(sta->ptk[sta->ptk_idx]);
4698 if (!key)
4699 key = rcu_dereference(sdata->default_unicast_key);
4700
4701 if (key && (!(key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE) ||
4702 key->conf.cipher == WLAN_CIPHER_SUITE_TKIP))
4703 goto skip_offload;
4704
7d360f60 4705 sk_pacing_shift_update(skb->sk, sdata->local->hw.tx_sk_pacing_shift);
b101dd2d
FF		 4706 ieee80211_8023_xmit(sdata, dev, sta, key, skb);
4707 goto out;
50ff477a 4708
b101dd2d
FF		 4709skip_offload:
4710 ieee80211_subif_start_xmit(skb, dev);
6aea26ce 4711out:
50ff477a
JC		 4712 rcu_read_unlock();
4713
4714 return NETDEV_TX_OK;
4715}
4716
7528ec57
JB		 4717struct sk_buff *
4718ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
4719 struct sk_buff *skb, u32 info_flags)
4720{
4721 struct ieee80211_hdr *hdr;
4722 struct ieee80211_tx_data tx = {
4723 .local = sdata->local,
4724 .sdata = sdata,
4725 };
97ffe757 4726 struct sta_info *sta;
7528ec57
JB		 4727
4728 rcu_read_lock();
4729
97ffe757
JB		 4730 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4731 kfree_skb(skb);
4732 skb = ERR_PTR(-EINVAL);
4733 goto out;
4734 }
4735
963d0e8d
JB		 4736 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta,
4737 IEEE80211_TX_CTRL_MLO_LINK_UNSPEC, NULL);
7528ec57
JB		 4738 if (IS_ERR(skb))
4739 goto out;
4740
4741 hdr = (void *)skb->data;
4742 tx.sta = sta_info_get(sdata, hdr->addr1);
4743 tx.skb = skb;
4744
4745 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
4746 rcu_read_unlock();
4747 kfree_skb(skb);
4748 return ERR_PTR(-EINVAL);
4749 }
4750
4751out:
4752 rcu_read_unlock();
4753 return skb;
4754}
4755
e2530083
JB		 4756/*
4757 * ieee80211_clear_tx_pending may not be called in a context where
4758 * it is possible that it packets could come in again.
4759 */
e2ebc74d
JB		 4760void ieee80211_clear_tx_pending(struct ieee80211_local *local)
4761{
1f98ab7f 4762 struct sk_buff *skb;
2de8e0d9 4763 int i;
e2ebc74d 4764
1f98ab7f
FF		 4765 for (i = 0; i < local->hw.queues; i++) {
4766 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
4767 ieee80211_free_txskb(&local->hw, skb);
4768 }
e2ebc74d
JB		 4769}
4770
7bb45683
JB		 4771/*
4772 * Returns false if the frame couldn't be transmitted but was queued instead,
4773 * which in this case means re-queued -- take as an indication to stop sending
4774 * more pending frames.
4775 */
cd8ffc80
JB		 4776static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
4777 struct sk_buff *skb)
4778{
4779 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
4780 struct ieee80211_sub_if_data *sdata;
4781 struct sta_info *sta;
4782 struct ieee80211_hdr *hdr;
7bb45683 4783 bool result;
55de908a 4784 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 4785
5061b0c2 4786 sdata = vif_to_sdata(info->control.vif);
cd8ffc80 4787
cc20ff2c 4788 if (info->control.flags & IEEE80211_TX_INTCFL_NEED_TXPROCESSING) {
eef25a66 4789 /* update band only for non-MLD */
f1871abd 4790 if (!ieee80211_vif_is_mld(&sdata->vif)) {
eef25a66
JB		 4791 chanctx_conf =
4792 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
4793 if (unlikely(!chanctx_conf)) {
4794 dev_kfree_skb(skb);
4795 return true;
4796 }
4797 info->band = chanctx_conf->def.chan->band;
55de908a 4798 }
08aca29a 4799 result = ieee80211_tx(sdata, NULL, skb, true);
cc20ff2c 4800 } else if (info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP) {
50ff477a
JC		 4801 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
4802 dev_kfree_skb(skb);
4803 return true;
4804 }
4805
4806 if (IS_ERR(sta) || (sta && !sta->uploaded))
4807 sta = NULL;
4808
30f6cf96 4809 result = ieee80211_tx_8023(sdata, skb, sta, true);
cd8ffc80 4810 } else {
252b86c4
JB		 4811 struct sk_buff_head skbs;
4812
4813 __skb_queue_head_init(&skbs);
4814 __skb_queue_tail(&skbs, skb);
4815
cd8ffc80 4816 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 4817 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 4818
30f6cf96 4819 result = __ieee80211_tx(local, &skbs, sta, true);
cd8ffc80
JB		 4820 }
4821
cd8ffc80
JB		 4822 return result;
4823}
4824
e2530083 4825/*
3b8d81e0 4826 * Transmit all pending packets. Called from tasklet.
e2530083 4827 */
da1cad73 4828void ieee80211_tx_pending(struct tasklet_struct *t)
e2ebc74d 4829{
da1cad73
AP		 4830 struct ieee80211_local *local = from_tasklet(local, t,
4831 tx_pending_tasklet);
2a577d98 4832 unsigned long flags;
cd8ffc80 4833 int i;
3b8d81e0 4834 bool txok;
e2ebc74d 4835
f0e72851 4836 rcu_read_lock();
e2530083 4837
3b8d81e0 4838 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 4839 for (i = 0; i < local->hw.queues; i++) {
4840 /*
4841 * If queue is stopped by something other than due to pending
4842 * frames, or we have no pending frames, proceed to next queue.
4843 */
3b8d81e0 4844 if (local->queue_stop_reasons[i] ||
2a577d98 4845 skb_queue_empty(&local->pending[i]))
e2ebc74d 4846 continue;
e2530083 4847
2a577d98 4848 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 4849 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 4850 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 4851
a7bc376c 4852 if (WARN_ON(!info->control.vif)) {
c3e7724b 4853 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 4854 continue;
4855 }
4856
3b8d81e0
JB		 4857 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
4858 flags);
4859
4860 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 4861 spin_lock_irqsave(&local->queue_stop_reason_lock,
4862 flags);
4863 if (!txok)
2a577d98 4864 break;
e2ebc74d
JB		 4865 }
4866 }
3b8d81e0 4867 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 4868
f0e72851 4869 rcu_read_unlock();
e2ebc74d
JB		 4870}
4871
4872/* functions for drivers to get certain frames */
4873
eac70c13 4874static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
d8675a63 4875 struct ieee80211_link_data *link,
6ec8c332 4876 struct ps_data *ps, struct sk_buff *skb,
d8675a63 4877 bool is_template)
e2ebc74d
JB		 4878{
4879 u8 *pos, *tim;
4880 int aid0 = 0;
4881 int i, have_bits = 0, n1, n2;
d8675a63 4882 struct ieee80211_bss_conf *link_conf = link->conf;
e2ebc74d
JB		 4883
4884 /* Generate bitmap for TIM only if there are any STAs in power save
4885 * mode. */
d012a605 4886 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 4887 /* in the hope that this is faster than
4888 * checking byte-for-byte */
f359d3fe 4889 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 4890 IEEE80211_MAX_AID+1);
6ec8c332
AO		 4891 if (!is_template) {
4892 if (ps->dtim_count == 0)
6e8912a5 4893 ps->dtim_count = link_conf->dtim_period - 1;
6ec8c332
AO		 4894 else
4895 ps->dtim_count--;
4896 }
e2ebc74d 4897
209d70d3 4898 tim = pos = skb_put(skb, 5);
e2ebc74d 4899 *pos++ = WLAN_EID_TIM;
209d70d3 4900 *pos++ = 3;
d012a605 4901 *pos++ = ps->dtim_count;
6e8912a5 4902 *pos++ = link_conf->dtim_period;
e2ebc74d 4903
d012a605 4904 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 4905 aid0 = 1;
4906
d012a605 4907 ps->dtim_bc_mc = aid0 == 1;
512119b3 4908
e2ebc74d
JB		 4909 if (have_bits) {
4910 /* Find largest even number N1 so that bits numbered 1 through
4911 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
4912 * (N2 + 1) x 8 through 2007 are 0. */
4913 n1 = 0;
4914 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 4915 if (ps->tim[i]) {
e2ebc74d
JB		 4916 n1 = i & 0xfe;
4917 break;
4918 }
4919 }
4920 n2 = n1;
4921 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 4922 if (ps->tim[i]) {
e2ebc74d
JB		 4923 n2 = i;
4924 break;
4925 }
4926 }
4927
4928 /* Bitmap control */
4929 *pos++ = n1 | aid0;
4930 /* Part Virt Bitmap */
209d70d3 4931 skb_put_data(skb, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 4932
4933 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 4934 } else {
4935 *pos++ = aid0; /* Bitmap control */
209d70d3
KF		 4936
4937 if (ieee80211_get_link_sband(link)->band != NL80211_BAND_S1GHZ) {
4938 tim[1] = 4;
4939 /* Part Virt Bitmap */
4940 skb_put_u8(skb, 0);
4941 }
e2ebc74d 4942 }
e2ebc74d
JB		 4943}
4944
eac70c13 4945static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
d8675a63 4946 struct ieee80211_link_data *link,
6ec8c332 4947 struct ps_data *ps, struct sk_buff *skb,
d8675a63 4948 bool is_template)
eac70c13
MP		 4949{
4950 struct ieee80211_local *local = sdata->local;
4951
4952 /*
4953 * Not very nice, but we want to allow the driver to call
4954 * ieee80211_beacon_get() as a response to the set_tim()
4955 * callback. That, however, is already invoked under the
4956 * sta_lock to guarantee consistent and race-free update
4957 * of the tim bitmap in mac80211 and the driver.
4958 */
4959 if (local->tim_in_locked_section) {
d8675a63 4960 __ieee80211_beacon_add_tim(sdata, link, ps, skb, is_template);
eac70c13 4961 } else {
1b91731d 4962 spin_lock_bh(&local->tim_lock);
d8675a63 4963 __ieee80211_beacon_add_tim(sdata, link, ps, skb, is_template);
1b91731d 4964 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 4965 }
4966
4967 return 0;
4968}
4969
8552a434 4970static void ieee80211_set_beacon_cntdwn(struct ieee80211_sub_if_data *sdata,
6e8912a5 4971 struct beacon_data *beacon,
d8675a63 4972 struct ieee80211_link_data *link)
73da7d5b 4973{
5f9404ab 4974 u8 *beacon_data, count, max_count = 1;
73da7d5b 4975 struct probe_resp *resp;
cd7760e6 4976 size_t beacon_data_len;
5f9404ab 4977 u16 *bcn_offsets;
0d06d9ba 4978 int i;
cd7760e6
SW		 4979
4980 switch (sdata->vif.type) {
4981 case NL80211_IFTYPE_AP:
4982 beacon_data = beacon->tail;
4983 beacon_data_len = beacon->tail_len;
4984 break;
4985 case NL80211_IFTYPE_ADHOC:
4986 beacon_data = beacon->head;
4987 beacon_data_len = beacon->head_len;
4988 break;
b8456a14
CYY		 4989 case NL80211_IFTYPE_MESH_POINT:
4990 beacon_data = beacon->head;
4991 beacon_data_len = beacon->head_len;
4992 break;
cd7760e6
SW		 4993 default:
4994 return;
4995 }
73da7d5b 4996
d8675a63 4997 resp = rcu_dereference(link->u.ap.probe_resp);
5f9404ab
JC		 4998
4999 bcn_offsets = beacon->cntdwn_counter_offsets;
5000 count = beacon->cntdwn_current_counter;
d8675a63 5001 if (link->conf->csa_active)
5f9404ab 5002 max_count = IEEE80211_MAX_CNTDWN_COUNTERS_NUM;
0d06d9ba 5003
5f9404ab
JC		 5004 for (i = 0; i < max_count; ++i) {
5005 if (bcn_offsets[i]) {
d8675a63 5006 if (WARN_ON_ONCE(bcn_offsets[i] >= beacon_data_len))
0d06d9ba 5007 return;
5f9404ab 5008 beacon_data[bcn_offsets[i]] = count;
73da7d5b 5009 }
af296bdb 5010
5f9404ab
JC		 5011 if (sdata->vif.type == NL80211_IFTYPE_AP && resp) {
5012 u16 *resp_offsets = resp->cntdwn_counter_offsets;
5013
5014 resp->data[resp_offsets[i]] = count;
5015 }
73da7d5b 5016 }
1af586c9
AO		 5017}
5018
d19bac3d
JB		 5019static u8 __ieee80211_beacon_update_cntdwn(struct ieee80211_link_data *link,
5020 struct beacon_data *beacon)
e996ec2a 5021{
d19bac3d
JB		 5022 if (beacon->cntdwn_current_counter == 1) {
5023 /*
5024 * Channel switch handling is done by a worker thread while
5025 * beacons get pulled from hardware timers. It's therefore
5026 * possible that software threads are slow enough to not be
5027 * able to complete CSA handling in a single beacon interval,
5028 * in which case we get here. There isn't much to do about
5029 * it, other than letting the user know that the AP isn't
5030 * behaving correctly.
5031 */
5032 link_err_once(link,
5033 "beacon TX faster than countdown (channel/color switch) completion\n");
5034 return 0;
5035 }
e996ec2a 5036
d19bac3d 5037 beacon->cntdwn_current_counter--;
e996ec2a 5038
8552a434 5039 return beacon->cntdwn_current_counter;
e996ec2a
WD		 5040}
5041
480e7048 5042u8 ieee80211_beacon_update_cntdwn(struct ieee80211_vif *vif, unsigned int link_id)
1af586c9
AO		 5043{
5044 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
480e7048 5045 struct ieee80211_link_data *link;
af296bdb
MK		 5046 struct beacon_data *beacon = NULL;
5047 u8 count = 0;
0d06d9ba 5048
480e7048
AKS		 5049 if (WARN_ON(link_id >= IEEE80211_MLD_MAX_NUM_LINKS))
5050 return 0;
5051
af296bdb
MK		 5052 rcu_read_lock();
5053
480e7048
AKS		 5054 link = rcu_dereference(sdata->link[link_id]);
5055 if (!link)
5056 goto unlock;
5057
af296bdb 5058 if (sdata->vif.type == NL80211_IFTYPE_AP)
480e7048 5059 beacon = rcu_dereference(link->u.ap.beacon);
af296bdb
MK		 5060 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
5061 beacon = rcu_dereference(sdata->u.ibss.presp);
5062 else if (ieee80211_vif_is_mesh(&sdata->vif))
5063 beacon = rcu_dereference(sdata->u.mesh.beacon);
5064
5065 if (!beacon)
5066 goto unlock;
5067
d19bac3d 5068 count = __ieee80211_beacon_update_cntdwn(link, beacon);
1af586c9 5069
af296bdb
MK		 5070unlock:
5071 rcu_read_unlock();
5072 return count;
73da7d5b 5073}
8552a434 5074EXPORT_SYMBOL(ieee80211_beacon_update_cntdwn);
73da7d5b 5075
8552a434 5076void ieee80211_beacon_set_cntdwn(struct ieee80211_vif *vif, u8 counter)
03737001
GG		 5077{
5078 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5079 struct beacon_data *beacon = NULL;
5080
5081 rcu_read_lock();
5082
5083 if (sdata->vif.type == NL80211_IFTYPE_AP)
bfd8403a 5084 beacon = rcu_dereference(sdata->deflink.u.ap.beacon);
03737001
GG		 5085 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
5086 beacon = rcu_dereference(sdata->u.ibss.presp);
5087 else if (ieee80211_vif_is_mesh(&sdata->vif))
5088 beacon = rcu_dereference(sdata->u.mesh.beacon);
5089
5090 if (!beacon)
5091 goto unlock;
5092
8552a434
JC		 5093 if (counter < beacon->cntdwn_current_counter)
5094 beacon->cntdwn_current_counter = counter;
03737001
GG		 5095
5096unlock:
5097 rcu_read_unlock();
5098}
8552a434 5099EXPORT_SYMBOL(ieee80211_beacon_set_cntdwn);
03737001 5100
6030b3a4
AKS		 5101bool ieee80211_beacon_cntdwn_is_complete(struct ieee80211_vif *vif,
5102 unsigned int link_id)
73da7d5b
SW		 5103{
5104 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
6030b3a4 5105 struct ieee80211_link_data *link;
73da7d5b
SW		 5106 struct beacon_data *beacon = NULL;
5107 u8 *beacon_data;
5108 size_t beacon_data_len;
73da7d5b
SW		 5109 int ret = false;
5110
5111 if (!ieee80211_sdata_running(sdata))
5112 return false;
5113
6030b3a4
AKS		 5114 if (WARN_ON(link_id >= IEEE80211_MLD_MAX_NUM_LINKS))
5115 return 0;
5116
73da7d5b 5117 rcu_read_lock();
6030b3a4
AKS		 5118
5119 link = rcu_dereference(sdata->link[link_id]);
5120 if (!link)
5121 goto out;
5122
73da7d5b 5123 if (vif->type == NL80211_IFTYPE_AP) {
6030b3a4 5124 beacon = rcu_dereference(link->u.ap.beacon);
73da7d5b
SW		 5125 if (WARN_ON(!beacon || !beacon->tail))
5126 goto out;
5127 beacon_data = beacon->tail;
5128 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 5129 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
5130 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
5131
5132 beacon = rcu_dereference(ifibss->presp);
5133 if (!beacon)
5134 goto out;
5135
b8456a14
CYY		 5136 beacon_data = beacon->head;
5137 beacon_data_len = beacon->head_len;
5138 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
5139 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
5140
5141 beacon = rcu_dereference(ifmsh->beacon);
5142 if (!beacon)
5143 goto out;
5144
cd7760e6
SW		 5145 beacon_data = beacon->head;
5146 beacon_data_len = beacon->head_len;
73da7d5b
SW		 5147 } else {
5148 WARN_ON(1);
5149 goto out;
5150 }
5151
8552a434 5152 if (!beacon->cntdwn_counter_offsets[0])
10d78f27
MK		 5153 goto out;
5154
8552a434 5155 if (WARN_ON_ONCE(beacon->cntdwn_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 5156 goto out;
5157
8552a434 5158 if (beacon_data[beacon->cntdwn_counter_offsets[0]] == 1)
73da7d5b 5159 ret = true;
8552a434 5160
73da7d5b
SW		 5161 out:
5162 rcu_read_unlock();
5163
5164 return ret;
5165}
8552a434 5166EXPORT_SYMBOL(ieee80211_beacon_cntdwn_is_complete);
73da7d5b 5167
0a3a8436
JM		 5168static int ieee80211_beacon_protect(struct sk_buff *skb,
5169 struct ieee80211_local *local,
6e8912a5 5170 struct ieee80211_sub_if_data *sdata,
d8675a63 5171 struct ieee80211_link_data *link)
0a3a8436
JM		 5172{
5173 ieee80211_tx_result res;
5174 struct ieee80211_tx_data tx;
95247705 5175 struct sk_buff *check_skb;
0a3a8436
JM		 5176
5177 memset(&tx, 0, sizeof(tx));
d8675a63 5178 tx.key = rcu_dereference(link->default_beacon_key);
0a3a8436
JM		 5179 if (!tx.key)
5180 return 0;
3ffcc659
JB		 5181
5182 if (unlikely(tx.key->flags & KEY_FLAG_TAINTED)) {
5183 tx.key = NULL;
5184 return -EINVAL;
5185 }
5186
d1b9bb65
JB		 5187 if (!(tx.key->conf.flags & IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
5188 tx.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
5189 IEEE80211_SKB_CB(skb)->control.hw_key = &tx.key->conf;
5190
0a3a8436
JM		 5191 tx.local = local;
5192 tx.sdata = sdata;
5193 __skb_queue_head_init(&tx.skbs);
5194 __skb_queue_tail(&tx.skbs, skb);
5195 res = ieee80211_tx_h_encrypt(&tx);
95247705
JB		 5196 check_skb = __skb_dequeue(&tx.skbs);
5197 /* we may crash after this, but it'd be a bug in crypto */
5198 WARN_ON(check_skb != skb);
0a3a8436 5199 if (WARN_ON_ONCE(res != TX_CONTINUE))
95247705 5200 return -EINVAL;
0a3a8436
JM		 5201
5202 return 0;
5203}
5204
a6e34fde
AD		 5205static void
5206ieee80211_beacon_get_finish(struct ieee80211_hw *hw,
5207 struct ieee80211_vif *vif,
d8675a63 5208 struct ieee80211_link_data *link,
a6e34fde
AD		 5209 struct ieee80211_mutable_offsets *offs,
5210 struct beacon_data *beacon,
5211 struct sk_buff *skb,
5212 struct ieee80211_chanctx_conf *chanctx_conf,
d8675a63 5213 u16 csa_off_base)
a6e34fde
AD		 5214{
5215 struct ieee80211_local *local = hw_to_local(hw);
5216 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5217 struct ieee80211_tx_info *info;
5218 enum nl80211_band band;
5219 struct ieee80211_tx_rate_control txrc;
5220
5221 /* CSA offsets */
5222 if (offs && beacon) {
5223 u16 i;
5224
5225 for (i = 0; i < IEEE80211_MAX_CNTDWN_COUNTERS_NUM; i++) {
5226 u16 csa_off = beacon->cntdwn_counter_offsets[i];
5227
5228 if (!csa_off)
5229 continue;
5230
5231 offs->cntdwn_counter_offs[i] = csa_off_base + csa_off;
5232 }
5233 }
5234
5235 band = chanctx_conf->def.chan->band;
5236 info = IEEE80211_SKB_CB(skb);
5237 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
5238 info->flags |= IEEE80211_TX_CTL_NO_ACK;
5239 info->band = band;
5240
5241 memset(&txrc, 0, sizeof(txrc));
5242 txrc.hw = hw;
5243 txrc.sband = local->hw.wiphy->bands[band];
d8675a63 5244 txrc.bss_conf = link->conf;
a6e34fde
AD		 5245 txrc.skb = skb;
5246 txrc.reported_rate.idx = -1;
5247 if (sdata->beacon_rate_set && sdata->beacon_rateidx_mask[band])
5248 txrc.rate_idx_mask = sdata->beacon_rateidx_mask[band];
5249 else
5250 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
5251 txrc.bss = true;
5252 rate_control_get_rate(sdata, NULL, &txrc);
5253
5254 info->control.vif = vif;
8b06d13e
JB		 5255 info->control.flags |= u32_encode_bits(link->link_id,
5256 IEEE80211_TX_CTRL_MLO_LINK);
a6e34fde
AD		 5257 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
5258 IEEE80211_TX_CTL_ASSIGN_SEQ |
5259 IEEE80211_TX_CTL_FIRST_FRAGMENT;
5260}
5261
2b3171c6 5262static void
bd54f3c2
AD		 5263ieee80211_beacon_add_mbssid(struct sk_buff *skb, struct beacon_data *beacon,
5264 u8 i)
2b3171c6 5265{
bd54f3c2
AD		 5266 if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt ||
5267 i > beacon->mbssid_ies->cnt)
5268 return;
2b3171c6 5269
bd54f3c2
AD		 5270 if (i < beacon->mbssid_ies->cnt) {
5271 skb_put_data(skb, beacon->mbssid_ies->elem[i].data,
5272 beacon->mbssid_ies->elem[i].len);
68b9bea2
AD		 5273
5274 if (beacon->rnr_ies && beacon->rnr_ies->cnt) {
5275 skb_put_data(skb, beacon->rnr_ies->elem[i].data,
5276 beacon->rnr_ies->elem[i].len);
5277
5278 for (i = beacon->mbssid_ies->cnt; i < beacon->rnr_ies->cnt; i++)
5279 skb_put_data(skb, beacon->rnr_ies->elem[i].data,
5280 beacon->rnr_ies->elem[i].len);
5281 }
2b3171c6 5282 return;
bd54f3c2 5283 }
2b3171c6 5284
bd54f3c2 5285 /* i == beacon->mbssid_ies->cnt, include all MBSSID elements */
2b3171c6
LB		 5286 for (i = 0; i < beacon->mbssid_ies->cnt; i++)
5287 skb_put_data(skb, beacon->mbssid_ies->elem[i].data,
5288 beacon->mbssid_ies->elem[i].len);
5289}
5290
a6e34fde
AD		 5291static struct sk_buff *
5292ieee80211_beacon_get_ap(struct ieee80211_hw *hw,
5293 struct ieee80211_vif *vif,
d8675a63 5294 struct ieee80211_link_data *link,
a6e34fde
AD		 5295 struct ieee80211_mutable_offsets *offs,
5296 bool is_template,
5297 struct beacon_data *beacon,
bd54f3c2
AD		 5298 struct ieee80211_chanctx_conf *chanctx_conf,
5299 u8 ema_index)
a6e34fde
AD		 5300{
5301 struct ieee80211_local *local = hw_to_local(hw);
5302 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5303 struct ieee80211_if_ap *ap = &sdata->u.ap;
5304 struct sk_buff *skb = NULL;
5305 u16 csa_off_base = 0;
2b3171c6 5306 int mbssid_len;
a6e34fde
AD		 5307
5308 if (beacon->cntdwn_counter_offsets[0]) {
5309 if (!is_template)
480e7048 5310 ieee80211_beacon_update_cntdwn(vif, link->link_id);
a6e34fde 5311
d8675a63 5312 ieee80211_set_beacon_cntdwn(sdata, beacon, link);
a6e34fde
AD		 5313 }
5314
5315 /* headroom, head length,
2b3171c6 5316 * tail length, maximum TIM length and multiple BSSID length
a6e34fde 5317 */
bd54f3c2 5318 mbssid_len = ieee80211_get_mbssid_beacon_len(beacon->mbssid_ies,
68b9bea2 5319 beacon->rnr_ies,
bd54f3c2
AD		 5320 ema_index);
5321
a6e34fde
AD		 5322 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
5323 beacon->tail_len + 256 +
2b3171c6 5324 local->hw.extra_beacon_tailroom + mbssid_len);
a6e34fde
AD		 5325 if (!skb)
5326 return NULL;
5327
5328 skb_reserve(skb, local->tx_headroom);
5329 skb_put_data(skb, beacon->head, beacon->head_len);
5330
d8675a63 5331 ieee80211_beacon_add_tim(sdata, link, &ap->ps, skb, is_template);
a6e34fde
AD		 5332
5333 if (offs) {
5334 offs->tim_offset = beacon->head_len;
5335 offs->tim_length = skb->len - beacon->head_len;
5336 offs->cntdwn_counter_offs[0] = beacon->cntdwn_counter_offsets[0];
5337
2b3171c6 5338 if (mbssid_len) {
bd54f3c2 5339 ieee80211_beacon_add_mbssid(skb, beacon, ema_index);
2b3171c6
LB		 5340 offs->mbssid_off = skb->len - mbssid_len;
5341 }
5342
a6e34fde
AD		 5343 /* for AP the csa offsets are from tail */
5344 csa_off_base = skb->len;
5345 }
5346
5347 if (beacon->tail)
5348 skb_put_data(skb, beacon->tail, beacon->tail_len);
5349
786c5be9
DA		 5350 if (ieee80211_beacon_protect(skb, local, sdata, link) < 0) {
5351 dev_kfree_skb(skb);
a6e34fde 5352 return NULL;
786c5be9 5353 }
a6e34fde 5354
d8675a63
JB		 5355 ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5356 chanctx_conf, csa_off_base);
a6e34fde
AD		 5357 return skb;
5358}
5359
bd54f3c2
AD		 5360static struct ieee80211_ema_beacons *
5361ieee80211_beacon_get_ap_ema_list(struct ieee80211_hw *hw,
5362 struct ieee80211_vif *vif,
5363 struct ieee80211_link_data *link,
5364 struct ieee80211_mutable_offsets *offs,
5365 bool is_template, struct beacon_data *beacon,
5366 struct ieee80211_chanctx_conf *chanctx_conf)
5367{
5368 struct ieee80211_ema_beacons *ema = NULL;
5369
5370 if (!beacon->mbssid_ies || !beacon->mbssid_ies->cnt)
5371 return NULL;
5372
5373 ema = kzalloc(struct_size(ema, bcn, beacon->mbssid_ies->cnt),
5374 GFP_ATOMIC);
5375 if (!ema)
5376 return NULL;
5377
5378 for (ema->cnt = 0; ema->cnt < beacon->mbssid_ies->cnt; ema->cnt++) {
5379 ema->bcn[ema->cnt].skb =
5380 ieee80211_beacon_get_ap(hw, vif, link,
5381 &ema->bcn[ema->cnt].offs,
5382 is_template, beacon,
5383 chanctx_conf, ema->cnt);
5384 if (!ema->bcn[ema->cnt].skb)
5385 break;
5386 }
5387
5388 if (ema->cnt == beacon->mbssid_ies->cnt)
5389 return ema;
5390
5391 ieee80211_beacon_free_ema_list(ema);
5392 return NULL;
5393}
5394
5395#define IEEE80211_INCLUDE_ALL_MBSSID_ELEMS -1
5396
6ec8c332
AO		 5397static struct sk_buff *
5398__ieee80211_beacon_get(struct ieee80211_hw *hw,
5399 struct ieee80211_vif *vif,
5400 struct ieee80211_mutable_offsets *offs,
6e8912a5 5401 bool is_template,
bd54f3c2
AD		 5402 unsigned int link_id,
5403 int ema_index,
5404 struct ieee80211_ema_beacons **ema_beacons)
e2ebc74d
JB		 5405{
5406 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 5407 struct beacon_data *beacon = NULL;
9d139c81 5408 struct sk_buff *skb = NULL;
e2ebc74d 5409 struct ieee80211_sub_if_data *sdata = NULL;
55de908a 5410 struct ieee80211_chanctx_conf *chanctx_conf;
d8675a63 5411 struct ieee80211_link_data *link;
8318d78a 5412
5dfdaf58 5413 rcu_read_lock();
e2ebc74d 5414
32bfd35d 5415 sdata = vif_to_sdata(vif);
d8675a63
JB		 5416 link = rcu_dereference(sdata->link[link_id]);
5417 if (!link)
5418 goto out;
6e8912a5 5419 chanctx_conf =
d8675a63 5420 rcu_dereference(link->conf->chanctx_conf);
e2ebc74d 5421
55de908a 5422 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 5423 goto out;
5424
6ec8c332
AO		 5425 if (offs)
5426 memset(offs, 0, sizeof(*offs));
eddcbb94 5427
05c914fe 5428 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d8675a63 5429 beacon = rcu_dereference(link->u.ap.beacon);
a6e34fde 5430 if (!beacon)
9d139c81 5431 goto out;
a6e34fde 5432
bd54f3c2
AD		 5433 if (ema_beacons) {
5434 *ema_beacons =
5435 ieee80211_beacon_get_ap_ema_list(hw, vif, link,
5436 offs,
5437 is_template,
5438 beacon,
5439 chanctx_conf);
5440 } else {
5441 if (beacon->mbssid_ies && beacon->mbssid_ies->cnt) {
5442 if (ema_index >= beacon->mbssid_ies->cnt)
5443 goto out; /* End of MBSSID elements */
5444
5445 if (ema_index <= IEEE80211_INCLUDE_ALL_MBSSID_ELEMS)
5446 ema_index = beacon->mbssid_ies->cnt;
5447 } else {
5448 ema_index = 0;
5449 }
5450
5451 skb = ieee80211_beacon_get_ap(hw, vif, link, offs,
5452 is_template, beacon,
5453 chanctx_conf,
5454 ema_index);
5455 }
05c914fe 5456 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 5457 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 5458 struct ieee80211_hdr *hdr;
33b64eb2 5459
af296bdb
MK		 5460 beacon = rcu_dereference(ifibss->presp);
5461 if (!beacon)
9d139c81
JB		 5462 goto out;
5463
8552a434 5464 if (beacon->cntdwn_counter_offsets[0]) {
1af586c9 5465 if (!is_template)
d19bac3d 5466 __ieee80211_beacon_update_cntdwn(link, beacon);
cd7760e6 5467
d8675a63 5468 ieee80211_set_beacon_cntdwn(sdata, beacon, link);
1af586c9 5469 }
cd7760e6 5470
af296bdb 5471 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 5472 local->hw.extra_beacon_tailroom);
9d139c81
JB		 5473 if (!skb)
5474 goto out;
c3ffeab4 5475 skb_reserve(skb, local->tx_headroom);
59ae1d12 5476 skb_put_data(skb, beacon->head, beacon->head_len);
9d139c81
JB		 5477
5478 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 5479 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5480 IEEE80211_STYPE_BEACON);
a6e34fde 5481
d8675a63
JB		 5482 ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5483 chanctx_conf, 0);
902acc78 5484 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 5485 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 5486
af296bdb
MK		 5487 beacon = rcu_dereference(ifmsh->beacon);
5488 if (!beacon)
ac1bd846 5489 goto out;
ac1bd846 5490
8552a434 5491 if (beacon->cntdwn_counter_offsets[0]) {
1af586c9
AO		 5492 if (!is_template)
5493 /* TODO: For mesh csa_counter is in TU, so
5494 * decrementing it by one isn't correct, but
5495 * for now we leave it consistent with overall
5496 * mac80211's behavior.
5497 */
d19bac3d 5498 __ieee80211_beacon_update_cntdwn(link, beacon);
1af586c9 5499
d8675a63 5500 ieee80211_set_beacon_cntdwn(sdata, beacon, link);
1af586c9 5501 }
b8456a14 5502
dbf498fb 5503 if (ifmsh->sync_ops)
445cd452 5504 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
dbf498fb 5505
3b69a9c5 5506 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 5507 beacon->head_len +
3f52b7e3 5508 256 + /* TIM IE */
af296bdb 5509 beacon->tail_len +
70dabeb7 5510 local->hw.extra_beacon_tailroom);
902acc78
JB		 5511 if (!skb)
5512 goto out;
2b5e1967 5513 skb_reserve(skb, local->tx_headroom);
59ae1d12 5514 skb_put_data(skb, beacon->head, beacon->head_len);
d8675a63
JB		 5515 ieee80211_beacon_add_tim(sdata, link, &ifmsh->ps, skb,
5516 is_template);
6ec8c332
AO		 5517
5518 if (offs) {
af296bdb
MK		 5519 offs->tim_offset = beacon->head_len;
5520 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 5521 }
5522
59ae1d12 5523 skb_put_data(skb, beacon->tail, beacon->tail_len);
d8675a63
JB		 5524 ieee80211_beacon_get_finish(hw, vif, link, offs, beacon, skb,
5525 chanctx_conf, 0);
9d139c81
JB		 5526 } else {
5527 WARN_ON(1);
5dfdaf58 5528 goto out;
e2ebc74d
JB		 5529 }
5530
e6a9854b 5531 out:
5dfdaf58 5532 rcu_read_unlock();
e2ebc74d 5533 return skb;
6ec8c332
AO		 5534
5535}
5536
5537struct sk_buff *
5538ieee80211_beacon_get_template(struct ieee80211_hw *hw,
5539 struct ieee80211_vif *vif,
6e8912a5
ST		 5540 struct ieee80211_mutable_offsets *offs,
5541 unsigned int link_id)
6ec8c332 5542{
bd54f3c2
AD		 5543 return __ieee80211_beacon_get(hw, vif, offs, true, link_id,
5544 IEEE80211_INCLUDE_ALL_MBSSID_ELEMS, NULL);
6ec8c332
AO		 5545}
5546EXPORT_SYMBOL(ieee80211_beacon_get_template);
5547
bd54f3c2
AD		 5548struct sk_buff *
5549ieee80211_beacon_get_template_ema_index(struct ieee80211_hw *hw,
5550 struct ieee80211_vif *vif,
5551 struct ieee80211_mutable_offsets *offs,
5552 unsigned int link_id, u8 ema_index)
5553{
5554 return __ieee80211_beacon_get(hw, vif, offs, true, link_id, ema_index,
5555 NULL);
5556}
5557EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_index);
5558
5559void ieee80211_beacon_free_ema_list(struct ieee80211_ema_beacons *ema_beacons)
5560{
5561 u8 i;
5562
5563 if (!ema_beacons)
5564 return;
5565
5566 for (i = 0; i < ema_beacons->cnt; i++)
5567 kfree_skb(ema_beacons->bcn[i].skb);
5568
5569 kfree(ema_beacons);
5570}
5571EXPORT_SYMBOL(ieee80211_beacon_free_ema_list);
5572
5573struct ieee80211_ema_beacons *
5574ieee80211_beacon_get_template_ema_list(struct ieee80211_hw *hw,
5575 struct ieee80211_vif *vif,
5576 unsigned int link_id)
5577{
5578 struct ieee80211_ema_beacons *ema_beacons = NULL;
5579
1afa18e9 5580 WARN_ON(__ieee80211_beacon_get(hw, vif, NULL, true, link_id, 0,
bd54f3c2
AD		 5581 &ema_beacons));
5582
5583 return ema_beacons;
5584}
5585EXPORT_SYMBOL(ieee80211_beacon_get_template_ema_list);
5586
6ec8c332
AO		 5587struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
5588 struct ieee80211_vif *vif,
6e8912a5
ST		 5589 u16 *tim_offset, u16 *tim_length,
5590 unsigned int link_id)
6ec8c332
AO		 5591{
5592 struct ieee80211_mutable_offsets offs = {};
6e8912a5 5593 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false,
bd54f3c2
AD		 5594 link_id,
5595 IEEE80211_INCLUDE_ALL_MBSSID_ELEMS,
5596 NULL);
35afa588 5597 struct sk_buff *copy;
35afa588
HS		 5598
5599 if (!bcn)
5600 return bcn;
6ec8c332
AO		 5601
5602 if (tim_offset)
5603 *tim_offset = offs.tim_offset;
5604
5605 if (tim_length)
5606 *tim_length = offs.tim_length;
5607
35afa588
HS		 5608 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
5609 !hw_to_local(hw)->monitors)
5610 return bcn;
5611
5612 /* send a copy to monitor interfaces */
5613 copy = skb_copy(bcn, GFP_ATOMIC);
5614 if (!copy)
5615 return bcn;
5616
286e6967 5617 ieee80211_tx_monitor(hw_to_local(hw), copy, 1, NULL);
35afa588 5618
6ec8c332 5619 return bcn;
e2ebc74d 5620}
eddcbb94 5621EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 5622
02945821
AN		 5623struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
5624 struct ieee80211_vif *vif)
5625{
aa7a0080
ES		 5626 struct sk_buff *skb = NULL;
5627 struct probe_resp *presp = NULL;
02945821
AN		 5628 struct ieee80211_hdr *hdr;
5629 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5630
5631 if (sdata->vif.type != NL80211_IFTYPE_AP)
5632 return NULL;
5633
5634 rcu_read_lock();
bfd8403a 5635 presp = rcu_dereference(sdata->deflink.u.ap.probe_resp);
02945821
AN		 5636 if (!presp)
5637 goto out;
5638
aa7a0080 5639 skb = dev_alloc_skb(presp->len);
02945821
AN		 5640 if (!skb)
5641 goto out;
5642
59ae1d12 5643 skb_put_data(skb, presp->data, presp->len);
aa7a0080 5644
02945821
AN		 5645 hdr = (struct ieee80211_hdr *) skb->data;
5646 memset(hdr->addr1, 0, sizeof(hdr->addr1));
5647
5648out:
5649 rcu_read_unlock();
5650 return skb;
5651}
5652EXPORT_SYMBOL(ieee80211_proberesp_get);
5653
295b02c4
AD		 5654struct sk_buff *ieee80211_get_fils_discovery_tmpl(struct ieee80211_hw *hw,
5655 struct ieee80211_vif *vif)
5656{
5657 struct sk_buff *skb = NULL;
5658 struct fils_discovery_data *tmpl = NULL;
5659 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5660
5661 if (sdata->vif.type != NL80211_IFTYPE_AP)
5662 return NULL;
5663
5664 rcu_read_lock();
bfd8403a 5665 tmpl = rcu_dereference(sdata->deflink.u.ap.fils_discovery);
295b02c4
AD		 5666 if (!tmpl) {
5667 rcu_read_unlock();
5668 return NULL;
5669 }
5670
5671 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5672 if (skb) {
5673 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5674 skb_put_data(skb, tmpl->data, tmpl->len);
5675 }
5676
5677 rcu_read_unlock();
5678 return skb;
5679}
5680EXPORT_SYMBOL(ieee80211_get_fils_discovery_tmpl);
5681
632189a0
AD		 5682struct sk_buff *
5683ieee80211_get_unsol_bcast_probe_resp_tmpl(struct ieee80211_hw *hw,
5684 struct ieee80211_vif *vif)
5685{
5686 struct sk_buff *skb = NULL;
5687 struct unsol_bcast_probe_resp_data *tmpl = NULL;
5688 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5689
5690 if (sdata->vif.type != NL80211_IFTYPE_AP)
5691 return NULL;
5692
5693 rcu_read_lock();
bfd8403a 5694 tmpl = rcu_dereference(sdata->deflink.u.ap.unsol_bcast_probe_resp);
632189a0
AD		 5695 if (!tmpl) {
5696 rcu_read_unlock();
5697 return NULL;
5698 }
5699
5700 skb = dev_alloc_skb(sdata->local->hw.extra_tx_headroom + tmpl->len);
5701 if (skb) {
5702 skb_reserve(skb, sdata->local->hw.extra_tx_headroom);
5703 skb_put_data(skb, tmpl->data, tmpl->len);
5704 }
5705
5706 rcu_read_unlock();
5707 return skb;
5708}
5709EXPORT_SYMBOL(ieee80211_get_unsol_bcast_probe_resp_tmpl);
5710
7044cc56
KV		 5711struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
5712 struct ieee80211_vif *vif)
5713{
5714 struct ieee80211_sub_if_data *sdata;
7044cc56
KV		 5715 struct ieee80211_pspoll *pspoll;
5716 struct ieee80211_local *local;
5717 struct sk_buff *skb;
5718
5719 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5720 return NULL;
5721
5722 sdata = vif_to_sdata(vif);
7044cc56
KV		 5723 local = sdata->local;
5724
5725 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 5726 if (!skb)
7044cc56 5727 return NULL;
d15b8459 5728
7044cc56
KV		 5729 skb_reserve(skb, local->hw.extra_tx_headroom);
5730
b080db58 5731 pspoll = skb_put_zero(skb, sizeof(*pspoll));
7044cc56
KV		 5732 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
5733 IEEE80211_STYPE_PSPOLL);
f276e20b 5734 pspoll->aid = cpu_to_le16(sdata->vif.cfg.aid);
7044cc56
KV		 5735
5736 /* aid in PS-Poll has its two MSBs each set to 1 */
5737 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
5738
bfd8403a 5739 memcpy(pspoll->bssid, sdata->deflink.u.mgd.bssid, ETH_ALEN);
7044cc56
KV		 5740 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
5741
5742 return skb;
5743}
5744EXPORT_SYMBOL(ieee80211_pspoll_get);
5745
5746struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
7b6ddeaf 5747 struct ieee80211_vif *vif,
0ab26380 5748 int link_id, bool qos_ok)
7044cc56 5749{
0ab26380
JB		 5750 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5751 struct ieee80211_local *local = sdata->local;
5752 struct ieee80211_link_data *link = NULL;
7044cc56 5753 struct ieee80211_hdr_3addr *nullfunc;
7044cc56 5754 struct sk_buff *skb;
7b6ddeaf 5755 bool qos = false;
7044cc56
KV		 5756
5757 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
5758 return NULL;
5759
0ab26380
JB		 5760 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
5761 sizeof(*nullfunc) + 2);
5762 if (!skb)
5763 return NULL;
7044cc56 5764
0ab26380 5765 rcu_read_lock();
7b6ddeaf
JB		 5766 if (qos_ok) {
5767 struct sta_info *sta;
5768
0ab26380 5769 sta = sta_info_get(sdata, vif->cfg.ap_addr);
7b6ddeaf 5770 qos = sta && sta->sta.wme;
7b6ddeaf
JB		 5771 }
5772
0ab26380
JB		 5773 if (link_id >= 0) {
5774 link = rcu_dereference(sdata->link[link_id]);
5775 if (WARN_ON_ONCE(!link)) {
5776 rcu_read_unlock();
5777 kfree_skb(skb);
5778 return NULL;
5779 }
5780 }
d15b8459 5781
7044cc56
KV		 5782 skb_reserve(skb, local->hw.extra_tx_headroom);
5783
b080db58 5784 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
7044cc56
KV		 5785 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
5786 IEEE80211_STYPE_NULLFUNC |
5787 IEEE80211_FCTL_TODS);
7b6ddeaf 5788 if (qos) {
e0ba7095 5789 __le16 qoshdr = cpu_to_le16(7);
7b6ddeaf
JB		 5790
5791 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
5792 IEEE80211_STYPE_NULLFUNC) !=
5793 IEEE80211_STYPE_QOS_NULLFUNC);
5794 nullfunc->frame_control |=
5795 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
5796 skb->priority = 7;
5797 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
e0ba7095 5798 skb_put_data(skb, &qoshdr, sizeof(qoshdr));
7b6ddeaf
JB		 5799 }
5800
0ab26380
JB		 5801 if (link) {
5802 memcpy(nullfunc->addr1, link->conf->bssid, ETH_ALEN);
5803 memcpy(nullfunc->addr2, link->conf->addr, ETH_ALEN);
5804 memcpy(nullfunc->addr3, link->conf->bssid, ETH_ALEN);
5805 } else {
5806 memcpy(nullfunc->addr1, vif->cfg.ap_addr, ETH_ALEN);
5807 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
5808 memcpy(nullfunc->addr3, vif->cfg.ap_addr, ETH_ALEN);
5809 }
5810 rcu_read_unlock();
7044cc56
KV		 5811
5812 return skb;
5813}
5814EXPORT_SYMBOL(ieee80211_nullfunc_get);
5815
05e54ea6 5816struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 5817 const u8 *src_addr,
05e54ea6 5818 const u8 *ssid, size_t ssid_len,
b9a9ada1 5819 size_t tailroom)
05e54ea6 5820{
a344d677 5821 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 5822 struct ieee80211_hdr_3addr *hdr;
5823 struct sk_buff *skb;
5824 size_t ie_ssid_len;
5825 u8 *pos;
5826
05e54ea6
KV		 5827 ie_ssid_len = 2 + ssid_len;
5828
5829 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 5830 ie_ssid_len + tailroom);
d15b8459 5831 if (!skb)
05e54ea6 5832 return NULL;
05e54ea6
KV		 5833
5834 skb_reserve(skb, local->hw.extra_tx_headroom);
5835
b080db58 5836 hdr = skb_put_zero(skb, sizeof(*hdr));
05e54ea6
KV		 5837 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
5838 IEEE80211_STYPE_PROBE_REQ);
e83e6541 5839 eth_broadcast_addr(hdr->addr1);
a344d677 5840 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 5841 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 5842
5843 pos = skb_put(skb, ie_ssid_len);
5844 *pos++ = WLAN_EID_SSID;
5845 *pos++ = ssid_len;
88c868c4 5846 if (ssid_len)
05e54ea6
KV		 5847 memcpy(pos, ssid, ssid_len);
5848 pos += ssid_len;
5849
05e54ea6
KV		 5850 return skb;
5851}
5852EXPORT_SYMBOL(ieee80211_probereq_get);
5853
32bfd35d 5854void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 5855 const void *frame, size_t frame_len,
e039fa4a 5856 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 5857 struct ieee80211_rts *rts)
5858{
5859 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 5860
065e9605
HH		 5861 rts->frame_control =
5862 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 5863 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
5864 frame_txctl);
e2ebc74d
JB		 5865 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
5866 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
5867}
5868EXPORT_SYMBOL(ieee80211_rts_get);
5869
32bfd35d 5870void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 5871 const void *frame, size_t frame_len,
e039fa4a 5872 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 5873 struct ieee80211_cts *cts)
5874{
5875 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 5876
065e9605
HH		 5877 cts->frame_control =
5878 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 5879 cts->duration = ieee80211_ctstoself_duration(hw, vif,
5880 frame_len, frame_txctl);
e2ebc74d
JB		 5881 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
5882}
5883EXPORT_SYMBOL(ieee80211_ctstoself_get);
5884
5885struct sk_buff *
32bfd35d 5886ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 5887 struct ieee80211_vif *vif)
e2ebc74d
JB		 5888{
5889 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 5890 struct sk_buff *skb = NULL;
5cf121c3 5891 struct ieee80211_tx_data tx;
e2ebc74d 5892 struct ieee80211_sub_if_data *sdata;
d012a605 5893 struct ps_data *ps;
e039fa4a 5894 struct ieee80211_tx_info *info;
55de908a 5895 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 5896
32bfd35d 5897 sdata = vif_to_sdata(vif);
5dfdaf58 5898
5dfdaf58 5899 rcu_read_lock();
d0a9123e 5900 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
5dfdaf58 5901
d012a605
MP		 5902 if (!chanctx_conf)
5903 goto out;
5904
5905 if (sdata->vif.type == NL80211_IFTYPE_AP) {
5906 struct beacon_data *beacon =
bfd8403a 5907 rcu_dereference(sdata->deflink.u.ap.beacon);
d012a605
MP		 5908
5909 if (!beacon || !beacon->head)
5910 goto out;
5911
5912 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 5913 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
5914 ps = &sdata->u.mesh.ps;
d012a605 5915 } else {
747cf5e9 5916 goto out;
d012a605 5917 }
5dfdaf58 5918
d012a605 5919 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 5920 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 5921
e2ebc74d 5922 while (1) {
d012a605 5923 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 5924 if (!skb)
747cf5e9 5925 goto out;
e2ebc74d
JB		 5926 local->total_ps_buffered--;
5927
d012a605 5928 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 5929 struct ieee80211_hdr *hdr =
5930 (struct ieee80211_hdr *) skb->data;
5931 /* more buffered multicast/broadcast frames ==> set
5932 * MoreData flag in IEEE 802.11 header to inform PS
5933 * STAs */
5934 hdr->frame_control |=
5935 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
5936 }
5937
112c44b2 5938 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 5939 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 5940 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 5941 break;
6b07d9ca 5942 ieee80211_free_txskb(hw, skb);
e2ebc74d 5943 }
e039fa4a
JB		 5944
5945 info = IEEE80211_SKB_CB(skb);
5946
5cf121c3 5947 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 5948 info->band = chanctx_conf->def.chan->band;
e2ebc74d 5949
97b045d6 5950 if (invoke_tx_handlers(&tx))
e2ebc74d 5951 skb = NULL;
97b045d6 5952 out:
d0709a65 5953 rcu_read_unlock();
e2ebc74d
JB		 5954
5955 return skb;
5956}
5957EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 5958
b6da911b
LK		 5959int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
5960{
5961 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
5962 struct ieee80211_sub_if_data *sdata = sta->sdata;
5963 struct ieee80211_local *local = sdata->local;
5964 int ret;
5965 u32 queues;
5966
4d3acf43 5967 lockdep_assert_wiphy(local->hw.wiphy);
b6da911b
LK		 5968
5969 /* only some cases are supported right now */
5970 switch (sdata->vif.type) {
5971 case NL80211_IFTYPE_STATION:
5972 case NL80211_IFTYPE_AP:
5973 case NL80211_IFTYPE_AP_VLAN:
5974 break;
5975 default:
5976 WARN_ON(1);
5977 return -EINVAL;
5978 }
5979
5980 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
5981 return -EINVAL;
5982
5983 if (sta->reserved_tid == tid) {
5984 ret = 0;
5985 goto out;
5986 }
5987
5988 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
5989 sdata_err(sdata, "TID reservation already active\n");
5990 ret = -EALREADY;
5991 goto out;
5992 }
5993
5994 ieee80211_stop_vif_queues(sdata->local, sdata,
5995 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
5996
5997 synchronize_net();
5998
5999 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 6000 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 6001 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
6002 __ieee80211_stop_tx_ba_session(sta, tid,
6003 AGG_STOP_LOCAL_REQUEST);
6004 }
6005
6006 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 6007 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 6008
6009 sta->reserved_tid = tid;
6010
6011 ieee80211_wake_vif_queues(local, sdata,
6012 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
6013
30686bf7 6014 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 6015 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
6016
6017 ret = 0;
6018 out:
6019 return ret;
6020}
6021EXPORT_SYMBOL(ieee80211_reserve_tid);
6022
6023void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
6024{
6025 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
6026 struct ieee80211_sub_if_data *sdata = sta->sdata;
6027
4d3acf43 6028 lockdep_assert_wiphy(sdata->local->hw.wiphy);
b6da911b
LK		 6029
6030 /* only some cases are supported right now */
6031 switch (sdata->vif.type) {
6032 case NL80211_IFTYPE_STATION:
6033 case NL80211_IFTYPE_AP:
6034 case NL80211_IFTYPE_AP_VLAN:
6035 break;
6036 default:
6037 WARN_ON(1);
6038 return;
6039 }
6040
6041 if (tid != sta->reserved_tid) {
6042 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
6043 return;
6044 }
6045
6046 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
6047}
6048EXPORT_SYMBOL(ieee80211_unreserve_tid);
6049
55de908a 6050void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
e1e68b14 6051 struct sk_buff *skb, int tid, int link_id,
08aca29a 6052 enum nl80211_band band)
3b8d81e0 6053{
69d41b5a 6054 const struct ieee80211_hdr *hdr = (void *)skb->data;
731977e9 6055 int ac = ieee80211_ac_from_tid(tid);
69d41b5a 6056 unsigned int link;
3a25a8c8 6057
d57a544d 6058 skb_reset_mac_header(skb);
3a25a8c8 6059 skb_set_queue_mapping(skb, ac);
cf6bb79a 6060 skb->priority = tid;
cf0277e7 6061
89afe614
JB		 6062 skb->dev = sdata->dev;
6063
69d41b5a
JB		 6064 BUILD_BUG_ON(IEEE80211_LINK_UNSPECIFIED < IEEE80211_MLD_MAX_NUM_LINKS);
6065 BUILD_BUG_ON(!FIELD_FIT(IEEE80211_TX_CTRL_MLO_LINK,
6066 IEEE80211_LINK_UNSPECIFIED));
6067
f1871abd 6068 if (!ieee80211_vif_is_mld(&sdata->vif)) {
69d41b5a 6069 link = 0;
e1e68b14
JB		 6070 } else if (link_id >= 0) {
6071 link = link_id;
69d41b5a
JB		 6072 } else if (memcmp(sdata->vif.addr, hdr->addr2, ETH_ALEN) == 0) {
6073 /* address from the MLD */
6074 link = IEEE80211_LINK_UNSPECIFIED;
6075 } else {
6076 /* otherwise must be addressed from a link */
d8675a63 6077 rcu_read_lock();
69d41b5a 6078 for (link = 0; link < ARRAY_SIZE(sdata->vif.link_conf); link++) {
d8675a63
JB		 6079 struct ieee80211_bss_conf *link_conf;
6080
6081 link_conf = rcu_dereference(sdata->vif.link_conf[link]);
6082 if (!link_conf)
6083 continue;
6084 if (memcmp(link_conf->addr, hdr->addr2, ETH_ALEN) == 0)
69d41b5a
JB		 6085 break;
6086 }
d8675a63 6087 rcu_read_unlock();
69d41b5a
JB		 6088
6089 if (WARN_ON_ONCE(link == ARRAY_SIZE(sdata->vif.link_conf)))
7b3b9ac8 6090 link = ffs(sdata->vif.active_links) - 1;
69d41b5a
JB		 6091 }
6092
6093 IEEE80211_SKB_CB(skb)->control.flags |=
6094 u32_encode_bits(link, IEEE80211_TX_CTRL_MLO_LINK);
6095
3d34deb6
JB		 6096 /*
6097 * The other path calling ieee80211_xmit is from the tasklet,
6098 * and while we can handle concurrent transmissions locking
6099 * requirements are that we do not come into tx with bhs on.
6100 */
6101 local_bh_disable();
73c4e195 6102 IEEE80211_SKB_CB(skb)->band = band;
08aca29a 6103 ieee80211_xmit(sdata, NULL, skb);
3d34deb6 6104 local_bh_enable();
3b8d81e0 6105}
91180649 6106
eef25a66 6107void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
e1e68b14 6108 struct sk_buff *skb, int tid, int link_id)
eef25a66
JB		 6109{
6110 struct ieee80211_chanctx_conf *chanctx_conf;
6111 enum nl80211_band band;
6112
6113 rcu_read_lock();
f1871abd 6114 if (!ieee80211_vif_is_mld(&sdata->vif)) {
e1e68b14 6115 WARN_ON(link_id >= 0);
eef25a66
JB		 6116 chanctx_conf =
6117 rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
6118 if (WARN_ON(!chanctx_conf)) {
6119 rcu_read_unlock();
6120 kfree_skb(skb);
6121 return;
6122 }
6123 band = chanctx_conf->def.chan->band;
6124 } else {
e1e68b14 6125 WARN_ON(link_id >= 0 &&
7b3b9ac8 6126 !(sdata->vif.active_links & BIT(link_id)));
eef25a66
JB		 6127 /* MLD transmissions must not rely on the band */
6128 band = 0;
6129 }
6130
e1e68b14 6131 __ieee80211_tx_skb_tid_band(sdata, skb, tid, link_id, band);
eef25a66
JB		 6132 rcu_read_unlock();
6133}
6134
91180649
DK		 6135int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
6136 const u8 *buf, size_t len,
dca9ca2d 6137 const u8 *dest, __be16 proto, bool unencrypted,
67207bab 6138 int link_id, u64 *cookie)
91180649
DK		 6139{
6140 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
6141 struct ieee80211_local *local = sdata->local;
10cb8e61 6142 struct sta_info *sta;
91180649
DK		 6143 struct sk_buff *skb;
6144 struct ethhdr *ehdr;
b95d2ccd 6145 u32 ctrl_flags = 0;
a7528198 6146 u32 flags = 0;
dd820ed6 6147 int err;
91180649 6148
0cd8080e
JB		 6149 /* mutex lock is only needed for incrementing the cookie counter */
6150 lockdep_assert_wiphy(local->hw.wiphy);
6151
91180649
DK		 6152 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
6153 * or Pre-Authentication
6154 */
6155 if (proto != sdata->control_port_protocol &&
6156 proto != cpu_to_be16(ETH_P_PREAUTH))
6157 return -EINVAL;
6158
b95d2ccd 6159 if (proto == sdata->control_port_protocol)
5af7fef3
MT		 6160 ctrl_flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO |
6161 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP;
b95d2ccd 6162
91180649 6163 if (unencrypted)
a7528198
MT		 6164 flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
6165
6166 if (cookie)
6167 ctrl_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
6168
10cb8e61 6169 flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX;
91180649
DK		 6170
6171 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
6172 sizeof(struct ethhdr) + len);
6173 if (!skb)
6174 return -ENOMEM;
6175
6176 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
6177
6178 skb_put_data(skb, buf, len);
6179
6180 ehdr = skb_push(skb, sizeof(struct ethhdr));
6181 memcpy(ehdr->h_dest, dest, ETH_ALEN);
67207bab 6182
9dd19538 6183 /* we may override the SA for MLO STA later */
67207bab 6184 if (link_id < 0) {
9dd19538
JB		 6185 ctrl_flags |= u32_encode_bits(IEEE80211_LINK_UNSPECIFIED,
6186 IEEE80211_TX_CTRL_MLO_LINK);
67207bab
AO		 6187 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
6188 } else {
6189 struct ieee80211_bss_conf *link_conf;
6190
9dd19538
JB		 6191 ctrl_flags |= u32_encode_bits(link_id,
6192 IEEE80211_TX_CTRL_MLO_LINK);
6193
67207bab
AO		 6194 rcu_read_lock();
6195 link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
6196 if (!link_conf) {
6197 dev_kfree_skb(skb);
6198 rcu_read_unlock();
6199 return -ENOLINK;
6200 }
6201 memcpy(ehdr->h_source, link_conf->addr, ETH_ALEN);
6202 rcu_read_unlock();
6203 }
6204
91180649
DK		 6205 ehdr->h_proto = proto;
6206
6207 skb->dev = dev;
10cb8e61 6208 skb->protocol = proto;
91180649
DK		 6209 skb_reset_network_header(skb);
6210 skb_reset_mac_header(skb);
6211
d873697e
HG		 6212 if (local->hw.queues < IEEE80211_NUM_ACS)
6213 goto start_xmit;
6214
10cb8e61 6215 /* update QoS header to prioritize control port frames if possible,
4b482281 6216 * prioritization also happens for control port frames send over
10cb8e61
MT		 6217 * AF_PACKET
6218 */
6219 rcu_read_lock();
dd820ed6
JB		 6220 err = ieee80211_lookup_ra_sta(sdata, skb, &sta);
6221 if (err) {
62b03f45 6222 dev_kfree_skb(skb);
dd820ed6
JB		 6223 rcu_read_unlock();
6224 return err;
6225 }
10cb8e61 6226
dd820ed6 6227 if (!IS_ERR(sta)) {
107395f9 6228 u16 queue = ieee80211_select_queue(sdata, sta, skb);
10cb8e61
MT		 6229
6230 skb_set_queue_mapping(skb, queue);
9dd19538
JB		 6231
6232 /*
6233 * for MLO STA, the SA should be the AP MLD address, but
6234 * the link ID has been selected already
6235 */
55f0a489 6236 if (sta && sta->sta.mlo)
9dd19538 6237 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
10cb8e61 6238 }
10cb8e61
MT		 6239 rcu_read_unlock();
6240
d873697e 6241start_xmit:
e7441c92 6242 local_bh_disable();
a7528198 6243 __ieee80211_subif_start_xmit(skb, skb->dev, flags, ctrl_flags, cookie);
e7441c92 6244 local_bh_enable();
91180649
DK		 6245
6246 return 0;
6247}
8828f81a
RM		 6248
6249int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev,
6250 const u8 *buf, size_t len)
6251{
6252 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
6253 struct ieee80211_local *local = sdata->local;
6254 struct sk_buff *skb;
6255
6256 skb = dev_alloc_skb(local->hw.extra_tx_headroom + len +
6257 30 + /* header size */
6258 18); /* 11s header size */
6259 if (!skb)
6260 return -ENOMEM;
6261
6262 skb_reserve(skb, local->hw.extra_tx_headroom);
6263 skb_put_data(skb, buf, len);
6264
6265 skb->dev = dev;
6266 skb->protocol = htons(ETH_P_802_3);
6267 skb_reset_network_header(skb);
6268 skb_reset_mac_header(skb);
6269
6270 local_bh_disable();
6271 __ieee80211_subif_start_xmit(skb, skb->dev, 0,
a7528198
MT		 6272 IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP,
6273 NULL);
e7441c92 6274 local_bh_enable();
91180649
DK		 6275
6276 return 0;
6277}
Linux 6.x block layer and io_uring tree(s)