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Merge tag 'xtensa-20180820' of git://github.com/jcmvbkbc/linux-xtensa
[linux-2.6-block.git] / net / mac80211 / tx.c
CommitLineData
e2ebc74d
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
d98ad83e 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
914eac24 7 * Copyright (C) 2018 Intel Corporation
e2ebc74d
JB		 8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 *
14 * Transmit and frame generation functions.
15 */
16
17#include <linux/kernel.h>
18#include <linux/slab.h>
19#include <linux/skbuff.h>
ebceec86 20#include <linux/if_vlan.h>
e2ebc74d
JB		 21#include <linux/etherdevice.h>
22#include <linux/bitmap.h>
d4e46a3d 23#include <linux/rcupdate.h>
bc3b2d7f 24#include <linux/export.h>
881d966b 25#include <net/net_namespace.h>
e2ebc74d
JB		 26#include <net/ieee80211_radiotap.h>
27#include <net/cfg80211.h>
28#include <net/mac80211.h>
5caa328e
MK		 29#include <net/codel.h>
30#include <net/codel_impl.h>
e2ebc74d 31#include <asm/unaligned.h>
fa962b92 32#include <net/fq_impl.h>
e2ebc74d
JB		 33
34#include "ieee80211_i.h"
24487981 35#include "driver-ops.h"
2c8dccc7 36#include "led.h"
33b64eb2 37#include "mesh.h"
e2ebc74d
JB		 38#include "wep.h"
39#include "wpa.h"
40#include "wme.h"
2c8dccc7 41#include "rate.h"
e2ebc74d 42
e2ebc74d
JB		 43/* misc utils */
44
5a490510
JB		 45static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
46{
47 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
48
49 u64_stats_update_begin(&tstats->syncp);
50 tstats->tx_packets++;
51 tstats->tx_bytes += len;
52 u64_stats_update_end(&tstats->syncp);
53}
54
252b86c4
JB		 55static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
56 struct sk_buff *skb, int group_addr,
03f93c3d 57 int next_frag_len)
e2ebc74d 58{
2103dec1 59 int rate, mrate, erp, dur, i, shift = 0;
2e92e6f2 60 struct ieee80211_rate *txrate;
e2ebc74d 61 struct ieee80211_local *local = tx->local;
8318d78a 62 struct ieee80211_supported_band *sband;
358c8d9d 63 struct ieee80211_hdr *hdr;
252b86c4 64 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2103dec1
SW		 65 struct ieee80211_chanctx_conf *chanctx_conf;
66 u32 rate_flags = 0;
67
95cd470c
FF		 68 /* assume HW handles this */
69 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
70 return 0;
71
2103dec1
SW		 72 rcu_read_lock();
73 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
74 if (chanctx_conf) {
75 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
76 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
77 }
78 rcu_read_unlock();
e6a9854b 79
e6a9854b 80 /* uh huh? */
0d528d85 81 if (WARN_ON_ONCE(tx->rate.idx < 0))
e6a9854b 82 return 0;
e2ebc74d 83
2d56577b 84 sband = local->hw.wiphy->bands[info->band];
0d528d85 85 txrate = &sband->bitrates[tx->rate.idx];
8318d78a 86
e6a9854b 87 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d
JB		 88
89 /*
90 * data and mgmt (except PS Poll):
91 * - during CFP: 32768
92 * - during contention period:
93 * if addr1 is group address: 0
94 * if more fragments = 0 and addr1 is individual address: time to
95 * transmit one ACK plus SIFS
96 * if more fragments = 1 and addr1 is individual address: time to
97 * transmit next fragment plus 2 x ACK plus 3 x SIFS
98 *
99 * IEEE 802.11, 9.6:
100 * - control response frame (CTS or ACK) shall be transmitted using the
101 * same rate as the immediately previous frame in the frame exchange
102 * sequence, if this rate belongs to the PHY mandatory rates, or else
103 * at the highest possible rate belonging to the PHY rates in the
104 * BSSBasicRateSet
105 */
252b86c4 106 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 107 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 108 /* TODO: These control frames are not currently sent by
ccd7b362 109 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 110 * needs to be updated to support duration field calculation.
111 *
112 * RTS: time needed to transmit pending data/mgmt frame plus
113 * one CTS frame plus one ACK frame plus 3 x SIFS
114 * CTS: duration of immediately previous RTS minus time
115 * required to transmit CTS and its SIFS
116 * ACK: 0 if immediately previous directed data/mgmt had
117 * more=0, with more=1 duration in ACK frame is duration
118 * from previous frame minus time needed to transmit ACK
119 * and its SIFS
120 * PS Poll: BIT(15) | BIT(14) | aid
121 */
122 return 0;
123 }
124
125 /* data/mgmt */
126 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 127 return cpu_to_le16(32768);
e2ebc74d
JB		 128
129 if (group_addr) /* Group address as the destination - no ACK */
130 return 0;
131
132 /* Individual destination address:
133 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
134 * CTS and ACK frames shall be transmitted using the highest rate in
135 * basic rate set that is less than or equal to the rate of the
136 * immediately previous frame and that is using the same modulation
137 * (CCK or OFDM). If no basic rate set matches with these requirements,
138 * the highest mandatory rate of the PHY that is less than or equal to
139 * the rate of the previous frame is used.
140 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
141 */
142 rate = -1;
8318d78a
JB		 143 /* use lowest available if everything fails */
144 mrate = sband->bitrates[0].bitrate;
145 for (i = 0; i < sband->n_bitrates; i++) {
146 struct ieee80211_rate *r = &sband->bitrates[i];
e2ebc74d 147
8318d78a
JB		 148 if (r->bitrate > txrate->bitrate)
149 break;
e2ebc74d 150
2103dec1
SW		 151 if ((rate_flags & r->flags) != rate_flags)
152 continue;
153
bda3933a 154 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
2103dec1 155 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
8318d78a
JB		 156
157 switch (sband->band) {
57fbcce3 158 case NL80211_BAND_2GHZ: {
8318d78a
JB		 159 u32 flag;
160 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
161 flag = IEEE80211_RATE_MANDATORY_G;
162 else
163 flag = IEEE80211_RATE_MANDATORY_B;
164 if (r->flags & flag)
165 mrate = r->bitrate;
166 break;
167 }
57fbcce3 168 case NL80211_BAND_5GHZ:
8318d78a
JB		 169 if (r->flags & IEEE80211_RATE_MANDATORY_A)
170 mrate = r->bitrate;
171 break;
57fbcce3 172 case NL80211_BAND_60GHZ:
3a0c52a6 173 /* TODO, for now fall through */
57fbcce3 174 case NUM_NL80211_BANDS:
8318d78a
JB		 175 WARN_ON(1);
176 break;
177 }
e2ebc74d
JB		 178 }
179 if (rate == -1) {
180 /* No matching basic rate found; use highest suitable mandatory
181 * PHY rate */
2103dec1 182 rate = DIV_ROUND_UP(mrate, 1 << shift);
e2ebc74d
JB		 183 }
184
6674f210
SW		 185 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
186 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 187 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 188 dur = 0;
189 else
190 /* Time needed to transmit ACK
191 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
192 * to closest integer */
4ee73f33 193 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
438b61b7
SW		 194 tx->sdata->vif.bss_conf.use_short_preamble,
195 shift);
e2ebc74d
JB		 196
197 if (next_frag_len) {
198 /* Frame is fragmented: duration increases with time needed to
199 * transmit next fragment plus ACK and 2 x SIFS. */
200 dur *= 2; /* ACK + SIFS */
201 /* next fragment */
4ee73f33 202 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 203 txrate->bitrate, erp,
438b61b7
SW		 204 tx->sdata->vif.bss_conf.use_short_preamble,
205 shift);
e2ebc74d
JB		 206 }
207
03f93c3d 208 return cpu_to_le16(dur);
e2ebc74d
JB		 209}
210
e2ebc74d 211/* tx handlers */
5c1b98a5
KV		 212static ieee80211_tx_result debug_noinline
213ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
214{
215 struct ieee80211_local *local = tx->local;
0c74211d 216 struct ieee80211_if_managed *ifmgd;
5c1b98a5
KV		 217
218 /* driver doesn't support power save */
30686bf7 219 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
5c1b98a5
KV		 220 return TX_CONTINUE;
221
222 /* hardware does dynamic power save */
30686bf7 223 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
5c1b98a5
KV		 224 return TX_CONTINUE;
225
226 /* dynamic power save disabled */
227 if (local->hw.conf.dynamic_ps_timeout <= 0)
228 return TX_CONTINUE;
229
230 /* we are scanning, don't enable power save */
231 if (local->scanning)
232 return TX_CONTINUE;
233
234 if (!local->ps_sdata)
235 return TX_CONTINUE;
236
237 /* No point if we're going to suspend */
238 if (local->quiescing)
239 return TX_CONTINUE;
240
0c74211d
KV		 241 /* dynamic ps is supported only in managed mode */
242 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
243 return TX_CONTINUE;
244
245 ifmgd = &tx->sdata->u.mgd;
246
247 /*
248 * Don't wakeup from power save if u-apsd is enabled, voip ac has
249 * u-apsd enabled and the frame is in voip class. This effectively
250 * means that even if all access categories have u-apsd enabled, in
251 * practise u-apsd is only used with the voip ac. This is a
252 * workaround for the case when received voip class packets do not
253 * have correct qos tag for some reason, due the network or the
254 * peer application.
255 *
dc41e4d4 256 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 257 * changed via debugfs, user needs to reassociate manually to have
258 * everything in sync.
259 */
4875d30d
JB		 260 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
261 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
262 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 263 return TX_CONTINUE;
264
5c1b98a5
KV		 265 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
266 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 267 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 268 IEEE80211_QUEUE_STOP_REASON_PS,
269 false);
db28569a 270 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
5c1b98a5
KV		 271 ieee80211_queue_work(&local->hw,
272 &local->dynamic_ps_disable_work);
273 }
274
5db1c07c
LC		 275 /* Don't restart the timer if we're not disassociated */
276 if (!ifmgd->associated)
277 return TX_CONTINUE;
278
5c1b98a5
KV		 279 mod_timer(&local->dynamic_ps_timer, jiffies +
280 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
281
282 return TX_CONTINUE;
283}
e2ebc74d 284
d9e8a70f 285static ieee80211_tx_result debug_noinline
5cf121c3 286ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 287{
358c8d9d 288
e039fa4a 289 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 290 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 291 bool assoc = false;
e2ebc74d 292
e039fa4a 293 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 294 return TX_CONTINUE;
58d4185e 295
b23b025f
BG		 296 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
297 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff
KV		 298 !ieee80211_is_probe_req(hdr->frame_control) &&
299 !ieee80211_is_nullfunc(hdr->frame_control))
300 /*
301 * When software scanning only nullfunc frames (to notify
302 * the sleep state to the AP) and probe requests (for the
303 * active scan) are allowed, all other frames should not be
304 * sent and we should not get here, but if we do
305 * nonetheless, drop them to avoid sending them
306 * off-channel. See the link below and
307 * ieee80211_start_scan() for more.
308 *
309 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
310 */
9ae54c84 311 return TX_DROP;
e2ebc74d 312
239281f8
RL		 313 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
314 return TX_CONTINUE;
315
1be7fe8d
BJ		 316 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
317 return TX_CONTINUE;
318
5cf121c3 319 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 320 return TX_CONTINUE;
e2ebc74d 321
c2c98fde
JB		 322 if (tx->sta)
323 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 324
5cf121c3 325 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 326 if (unlikely(!assoc &&
358c8d9d 327 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 328#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 329 sdata_info(tx->sdata,
330 "dropped data frame to not associated station %pM\n",
331 hdr->addr1);
332#endif
e2ebc74d 333 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 334 return TX_DROP;
e2ebc74d 335 }
72f15d53
MB		 336 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
337 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
29623892
JB		 338 /*
339 * No associated STAs - no need to send multicast
340 * frames.
341 */
342 return TX_DROP;
e2ebc74d
JB		 343 }
344
9ae54c84 345 return TX_CONTINUE;
e2ebc74d
JB		 346}
347
e2ebc74d
JB		 348/* This function is called whenever the AP is about to exceed the maximum limit
349 * of buffered frames for power saving STAs. This situation should not really
350 * happen often during normal operation, so dropping the oldest buffered packet
351 * from each queue should be OK to make some room for new frames. */
352static void purge_old_ps_buffers(struct ieee80211_local *local)
353{
354 int total = 0, purged = 0;
355 struct sk_buff *skb;
356 struct ieee80211_sub_if_data *sdata;
357 struct sta_info *sta;
358
79010420 359 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 360 struct ps_data *ps;
361
362 if (sdata->vif.type == NL80211_IFTYPE_AP)
363 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 364 else if (ieee80211_vif_is_mesh(&sdata->vif))
365 ps = &sdata->u.mesh.ps;
d012a605 366 else
e2ebc74d 367 continue;
d012a605
MP		 368
369 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 370 if (skb) {
371 purged++;
6b07d9ca 372 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 373 }
d012a605 374 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 375 }
e2ebc74d 376
948d887d
JB		 377 /*
378 * Drop one frame from each station from the lowest-priority
379 * AC that has frames at all.
380 */
d0709a65 381 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 382 int ac;
383
384 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
385 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
386 total += skb_queue_len(&sta->ps_tx_buf[ac]);
387 if (skb) {
388 purged++;
c3e7724b 389 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 390 break;
391 }
e2ebc74d 392 }
e2ebc74d 393 }
d0709a65 394
e2ebc74d 395 local->total_ps_buffered = total;
bdcbd8e0 396 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 397}
398
9ae54c84 399static ieee80211_tx_result
5cf121c3 400ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 401{
e039fa4a 402 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 403 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 404 struct ps_data *ps;
e039fa4a 405
7d54d0dd
JB		 406 /*
407 * broadcast/multicast frame
408 *
3f52b7e3 409 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 410 * the frame is buffered to be sent after DTIM beacon frame.
411 * This is done either by the hardware or us.
412 */
413
3f52b7e3 414 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 415 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
416 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
417 if (!tx->sdata->bss)
418 return TX_CONTINUE;
419
420 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 421 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
422 ps = &tx->sdata->u.mesh.ps;
d012a605 423 } else {
3e122be0 424 return TX_CONTINUE;
d012a605
MP		 425 }
426
3e122be0
JB		 427
428 /* no buffering for ordered frames */
358c8d9d 429 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 430 return TX_CONTINUE;
7d54d0dd 431
08b99399
JB		 432 if (ieee80211_is_probe_req(hdr->frame_control))
433 return TX_CONTINUE;
434
30686bf7 435 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 436 info->hw_queue = tx->sdata->vif.cab_queue;
437
7d54d0dd 438 /* no stations in PS mode */
d012a605 439 if (!atomic_read(&ps->num_sta_ps))
9ae54c84 440 return TX_CONTINUE;
7d54d0dd 441
62b517cb 442 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 443
62b517cb 444 /* device releases frame after DTIM beacon */
30686bf7 445 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 446 return TX_CONTINUE;
62b1208e 447
7d54d0dd 448 /* buffered in mac80211 */
62b1208e
JB		 449 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
450 purge_old_ps_buffers(tx->local);
451
d012a605 452 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 453 ps_dbg(tx->sdata,
454 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 455 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 456 } else
457 tx->local->total_ps_buffered++;
e2ebc74d 458
d012a605 459 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 460
62b1208e 461 return TX_QUEUED;
e2ebc74d
JB		 462}
463
fb733336
JM		 464static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
465 struct sk_buff *skb)
466{
467 if (!ieee80211_is_mgmt(fc))
468 return 0;
469
c2c98fde 470 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 471 return 0;
472
d8ca16db 473 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 474 return 0;
475
476 return 1;
477}
478
9ae54c84 479static ieee80211_tx_result
5cf121c3 480ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 481{
482 struct sta_info *sta = tx->sta;
e039fa4a 483 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 484 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 485 struct ieee80211_local *local = tx->local;
e2ebc74d 486
02f2f1a9 487 if (unlikely(!sta))
9ae54c84 488 return TX_CONTINUE;
e2ebc74d 489
c2c98fde 490 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 491 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
492 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 493 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 494 int ac = skb_get_queue_mapping(tx->skb);
495
08b99399
JB		 496 if (ieee80211_is_mgmt(hdr->frame_control) &&
497 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
498 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
499 return TX_CONTINUE;
500 }
501
bdcbd8e0
JB		 502 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
503 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 504 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
505 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 506
507 /* sync with ieee80211_sta_ps_deliver_wakeup */
508 spin_lock(&sta->ps_lock);
509 /*
510 * STA woke up the meantime and all the frames on ps_tx_buf have
511 * been queued to pending queue. No reordering can happen, go
512 * ahead and Tx the packet.
513 */
514 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
5ac2e350
JB		 515 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
516 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 517 spin_unlock(&sta->ps_lock);
518 return TX_CONTINUE;
519 }
520
948d887d
JB		 521 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
522 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 523 ps_dbg(tx->sdata,
524 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
525 sta->sta.addr, ac);
c3e7724b 526 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 527 } else
528 tx->local->total_ps_buffered++;
004c872e 529
e039fa4a 530 info->control.jiffies = jiffies;
5061b0c2 531 info->control.vif = &tx->sdata->vif;
8f77f384 532 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
03c8c06f 533 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 534 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 535 spin_unlock(&sta->ps_lock);
3393a608
JO		 536
537 if (!timer_pending(&local->sta_cleanup))
538 mod_timer(&local->sta_cleanup,
539 round_jiffies(jiffies +
540 STA_INFO_CLEANUP_INTERVAL));
541
c868cb35
JB		 542 /*
543 * We queued up some frames, so the TIM bit might
544 * need to be set, recalculate it.
545 */
546 sta_info_recalc_tim(sta);
547
9ae54c84 548 return TX_QUEUED;
bdcbd8e0
JB		 549 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
550 ps_dbg(tx->sdata,
551 "STA %pM in PS mode, but polling/in SP -> send frame\n",
552 sta->sta.addr);
e2ebc74d 553 }
e2ebc74d 554
9ae54c84 555 return TX_CONTINUE;
e2ebc74d
JB		 556}
557
d9e8a70f 558static ieee80211_tx_result debug_noinline
5cf121c3 559ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 560{
5cf121c3 561 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 562 return TX_CONTINUE;
e2ebc74d 563
5cf121c3 564 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 565 return ieee80211_tx_h_unicast_ps_buf(tx);
566 else
567 return ieee80211_tx_h_multicast_ps_buf(tx);
568}
569
a621fa4d
JB		 570static ieee80211_tx_result debug_noinline
571ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
572{
573 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
574
af61a165
JB		 575 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
576 if (tx->sdata->control_port_no_encrypt)
577 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
578 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
9c1c98a3 579 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 580 }
a621fa4d
JB		 581
582 return TX_CONTINUE;
583}
584
d9e8a70f 585static ieee80211_tx_result debug_noinline
5cf121c3 586ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 587{
46e6de15 588 struct ieee80211_key *key;
e039fa4a 589 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 590 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 591
3b8d81e0 592 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 593 tx->key = NULL;
2475b1cc
MS		 594 else if (tx->sta &&
595 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 596 tx->key = key;
46f6b060
MH		 597 else if (ieee80211_is_group_privacy_action(tx->skb) &&
598 (key = rcu_dereference(tx->sdata->default_multicast_key)))
599 tx->key = key;
3cfcf6ac 600 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324 601 is_multicast_ether_addr(hdr->addr1) &&
d8ca16db 602 ieee80211_is_robust_mgmt_frame(tx->skb) &&
3cfcf6ac
JM		 603 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
604 tx->key = key;
f7e0104c
JB		 605 else if (is_multicast_ether_addr(hdr->addr1) &&
606 (key = rcu_dereference(tx->sdata->default_multicast_key)))
607 tx->key = key;
608 else if (!is_multicast_ether_addr(hdr->addr1) &&
609 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 610 tx->key = key;
e8f4fb7c 611 else
4922f71f 612 tx->key = NULL;
e2ebc74d
JB		 613
614 if (tx->key) {
813d7669
JB		 615 bool skip_hw = false;
616
011bfcc4 617 /* TODO: add threshold stuff again */
176e4f84 618
97359d12
JB		 619 switch (tx->key->conf.cipher) {
620 case WLAN_CIPHER_SUITE_WEP40:
621 case WLAN_CIPHER_SUITE_WEP104:
97359d12 622 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 623 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 624 tx->key = NULL;
625 break;
97359d12 626 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 627 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 628 case WLAN_CIPHER_SUITE_GCMP:
629 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 630 if (!ieee80211_is_data_present(hdr->frame_control) &&
631 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 632 tx->skb) &&
633 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 634 tx->key = NULL;
3b43a187
KV		 635 else
636 skip_hw = (tx->key->conf.flags &
e548c49e 637 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 638 ieee80211_is_mgmt(hdr->frame_control);
fb733336 639 break;
97359d12 640 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 641 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 642 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
643 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 644 if (!ieee80211_is_mgmt(hdr->frame_control))
645 tx->key = NULL;
646 break;
176e4f84 647 }
813d7669 648
e54faf29
JB		 649 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
650 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 651 return TX_DROP;
652
f12553eb 653 if (!skip_hw && tx->key &&
382b1655 654 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 655 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 656 }
657
9ae54c84 658 return TX_CONTINUE;
e2ebc74d
JB		 659}
660
d9e8a70f 661static ieee80211_tx_result debug_noinline
5cf121c3 662ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 663{
e039fa4a 664 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 665 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
666 struct ieee80211_supported_band *sband;
a2c40249 667 u32 len;
e6a9854b 668 struct ieee80211_tx_rate_control txrc;
0d528d85 669 struct ieee80211_sta_rates *ratetbl = NULL;
c2c98fde 670 bool assoc = false;
8318d78a 671
e6a9854b 672 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 673
2d56577b 674 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 675
a2c40249 676 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 677 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 678
679 /* set up the tx rate control struct we give the RC algo */
005e472b 680 txrc.hw = &tx->local->hw;
e6a9854b
JB		 681 txrc.sband = sband;
682 txrc.bss_conf = &tx->sdata->vif.bss_conf;
683 txrc.skb = tx->skb;
684 txrc.reported_rate.idx = -1;
2d56577b 685 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
2ffbe6d3
FF		 686
687 if (tx->sdata->rc_has_mcs_mask[info->band])
688 txrc.rate_idx_mcs_mask =
689 tx->sdata->rc_rateidx_mcs_mask[info->band];
690
8f0729b1 691 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 692 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 693 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
694 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 695
696 /* set up RTS protection if desired */
b9a5f8ca 697 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 698 txrc.rts = true;
e2ebc74d 699 }
e2ebc74d 700
0d528d85 701 info->control.use_rts = txrc.rts;
991fec09
FF		 702 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
703
e6a9854b
JB		 704 /*
705 * Use short preamble if the BSS can handle it, but not for
706 * management frames unless we know the receiver can handle
707 * that -- the management frame might be to a station that
708 * just wants a probe response.
709 */
710 if (tx->sdata->vif.bss_conf.use_short_preamble &&
711 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 712 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 713 txrc.short_preamble = true;
714
715 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 716
dfdfc2be
SE		 717 /* don't ask rate control when rate already injected via radiotap */
718 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
719 return TX_CONTINUE;
720
c2c98fde
JB		 721 if (tx->sta)
722 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 723
724 /*
725 * Lets not bother rate control if we're associated and cannot
726 * talk to the sta. This should not happen.
727 */
c2c98fde 728 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 729 !rate_usable_index_exists(sband, &tx->sta->sta),
730 "%s: Dropped data frame as no usable bitrate found while "
731 "scanning and associated. Target station: "
732 "%pM on %d GHz band\n",
47846c9b 733 tx->sdata->name, hdr->addr1,
2d56577b 734 info->band ? 5 : 2))
b770b43e 735 return TX_DROP;
2e92e6f2 736
b770b43e
LR		 737 /*
738 * If we're associated with the sta at this point we know we can at
739 * least send the frame at the lowest bit rate.
740 */
e6a9854b
JB		 741 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
742
0d528d85
FF		 743 if (tx->sta && !info->control.skip_table)
744 ratetbl = rcu_dereference(tx->sta->sta.rates);
745
746 if (unlikely(info->control.rates[0].idx < 0)) {
747 if (ratetbl) {
748 struct ieee80211_tx_rate rate = {
749 .idx = ratetbl->rate[0].idx,
750 .flags = ratetbl->rate[0].flags,
751 .count = ratetbl->rate[0].count
752 };
753
754 if (ratetbl->rate[0].idx < 0)
755 return TX_DROP;
756
757 tx->rate = rate;
758 } else {
759 return TX_DROP;
760 }
761 } else {
762 tx->rate = info->control.rates[0];
763 }
e6a9854b 764
c1ce5a74 765 if (txrc.reported_rate.idx < 0) {
0d528d85 766 txrc.reported_rate = tx->rate;
c1ce5a74 767 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 768 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 769 } else if (tx->sta)
e5a9f8d0 770 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 771
0d528d85
FF		 772 if (ratetbl)
773 return TX_CONTINUE;
774
e6a9854b
JB		 775 if (unlikely(!info->control.rates[0].count))
776 info->control.rates[0].count = 1;
e2ebc74d 777
9955151d
GS		 778 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
779 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
780 info->control.rates[0].count = 1;
781
e6a9854b
JB		 782 return TX_CONTINUE;
783}
784
ba8c3d6f
FF		 785static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
786{
787 u16 *seq = &sta->tid_seq[tid];
788 __le16 ret = cpu_to_le16(*seq);
789
790 /* Increase the sequence number. */
791 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
792
793 return ret;
794}
795
f591fa5d
JB		 796static ieee80211_tx_result debug_noinline
797ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
798{
799 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
800 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 801 int tid;
802
25d834e1
JB		 803 /*
804 * Packet injection may want to control the sequence
805 * number, if we have no matching interface then we
806 * neither assign one ourselves nor ask the driver to.
807 */
5061b0c2 808 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 809 return TX_CONTINUE;
810
f591fa5d
JB		 811 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
812 return TX_CONTINUE;
813
814 if (ieee80211_hdrlen(hdr->frame_control) < 24)
815 return TX_CONTINUE;
816
49a59543
JB		 817 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
818 return TX_CONTINUE;
819
94778280
JB		 820 /*
821 * Anything but QoS data that has a sequence number field
822 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 823 * counter. QoS data frames with a multicast destination
824 * also use the global counter (802.11-2012 9.3.2.10).
94778280 825 */
c4c205f3
BC		 826 if (!ieee80211_is_data_qos(hdr->frame_control) ||
827 is_multicast_ether_addr(hdr->addr1)) {
b9771d41
JB		 828 if (tx->flags & IEEE80211_TX_NO_SEQNO)
829 return TX_CONTINUE;
94778280 830 /* driver should assign sequence number */
f591fa5d 831 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 832 /* for pure STA mode without beacons, we can do it */
833 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
834 tx->sdata->sequence_number += 0x10;
79c892b8 835 if (tx->sta)
e5a9f8d0 836 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 837 return TX_CONTINUE;
838 }
839
840 /*
841 * This should be true for injected/management frames only, for
842 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
843 * above since they are not QoS-data frames.
844 */
845 if (!tx->sta)
846 return TX_CONTINUE;
847
848 /* include per-STA, per-TID sequence counter */
a1f2ba04 849 tid = ieee80211_get_tid(hdr);
e5a9f8d0 850 tx->sta->tx_stats.msdu[tid]++;
f591fa5d 851
bb42f2d1 852 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 853
854 return TX_CONTINUE;
855}
856
252b86c4 857static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 858 struct sk_buff *skb, int hdrlen,
859 int frag_threshold)
860{
252b86c4 861 struct ieee80211_local *local = tx->local;
a1a3fcec 862 struct ieee80211_tx_info *info;
252b86c4 863 struct sk_buff *tmp;
2de8e0d9
JB		 864 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
865 int pos = hdrlen + per_fragm;
866 int rem = skb->len - hdrlen - per_fragm;
867
868 if (WARN_ON(rem < 0))
869 return -EINVAL;
870
252b86c4
JB		 871 /* first fragment was already added to queue by caller */
872
2de8e0d9
JB		 873 while (rem) {
874 int fraglen = per_fragm;
875
876 if (fraglen > rem)
877 fraglen = rem;
878 rem -= fraglen;
879 tmp = dev_alloc_skb(local->tx_headroom +
880 frag_threshold +
2475b1cc 881 tx->sdata->encrypt_headroom +
2de8e0d9
JB		 882 IEEE80211_ENCRYPT_TAILROOM);
883 if (!tmp)
884 return -ENOMEM;
252b86c4
JB		 885
886 __skb_queue_tail(&tx->skbs, tmp);
887
2475b1cc
MS		 888 skb_reserve(tmp,
889 local->tx_headroom + tx->sdata->encrypt_headroom);
890
2de8e0d9
JB		 891 /* copy control information */
892 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 893
894 info = IEEE80211_SKB_CB(tmp);
895 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
896 IEEE80211_TX_CTL_FIRST_FRAGMENT);
897
898 if (rem)
899 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
900
2de8e0d9
JB		 901 skb_copy_queue_mapping(tmp, skb);
902 tmp->priority = skb->priority;
2de8e0d9 903 tmp->dev = skb->dev;
2de8e0d9
JB		 904
905 /* copy header and data */
59ae1d12
JB		 906 skb_put_data(tmp, skb->data, hdrlen);
907 skb_put_data(tmp, skb->data + pos, fraglen);
2de8e0d9
JB		 908
909 pos += fraglen;
910 }
911
252b86c4 912 /* adjust first fragment's length */
338f977f 913 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 914 return 0;
915}
916
d9e8a70f 917static ieee80211_tx_result debug_noinline
e2454948
JB		 918ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
919{
2de8e0d9
JB		 920 struct sk_buff *skb = tx->skb;
921 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
922 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 923 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 924 int hdrlen;
925 int fragnum;
e2454948 926
252b86c4
JB		 927 /* no matter what happens, tx->skb moves to tx->skbs */
928 __skb_queue_tail(&tx->skbs, skb);
929 tx->skb = NULL;
930
a26eb27a
JB		 931 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
932 return TX_CONTINUE;
933
f3fe4e93 934 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
e2454948
JB		 935 return TX_CONTINUE;
936
eefce91a
JB		 937 /*
938 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 939 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 940 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 941 */
8b30b1fe 942 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 943 return TX_DROP;
944
065e9605 945 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 946
a26eb27a 947 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 948 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 949 return TX_DROP;
e6a9854b 950
2de8e0d9
JB		 951 /*
952 * Now fragment the frame. This will allocate all the fragments and
953 * chain them (using skb as the first fragment) to skb->next.
954 * During transmission, we will remove the successfully transmitted
955 * fragments from this list. When the low-level driver rejects one
956 * of the fragments then we will simply pretend to accept the skb
957 * but store it away as pending.
958 */
252b86c4 959 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 960 return TX_DROP;
e6a9854b 961
2de8e0d9
JB		 962 /* update duration/seq/flags of fragments */
963 fragnum = 0;
252b86c4
JB		 964
965 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 966 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 967
2de8e0d9
JB		 968 hdr = (void *)skb->data;
969 info = IEEE80211_SKB_CB(skb);
e6a9854b 970
252b86c4 971 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 972 hdr->frame_control |= morefrags;
e6a9854b
JB		 973 /*
974 * No multi-rate retries for fragmented frames, that
975 * would completely throw off the NAV at other STAs.
976 */
977 info->control.rates[1].idx = -1;
978 info->control.rates[2].idx = -1;
979 info->control.rates[3].idx = -1;
e3e1a0bc 980 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 981 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 982 } else {
983 hdr->frame_control &= ~morefrags;
e6a9854b 984 }
2de8e0d9
JB		 985 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
986 fragnum++;
252b86c4 987 }
e2ebc74d 988
9ae54c84 989 return TX_CONTINUE;
e2ebc74d
JB		 990}
991
feff1f2f
JB		 992static ieee80211_tx_result debug_noinline
993ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
994{
252b86c4 995 struct sk_buff *skb;
560d2682 996 int ac = -1;
feff1f2f
JB		 997
998 if (!tx->sta)
999 return TX_CONTINUE;
1000
252b86c4 1001 skb_queue_walk(&tx->skbs, skb) {
560d2682 1002 ac = skb_get_queue_mapping(skb);
e5a9f8d0 1003 tx->sta->tx_stats.bytes[ac] += skb->len;
252b86c4 1004 }
560d2682 1005 if (ac >= 0)
e5a9f8d0 1006 tx->sta->tx_stats.packets[ac]++;
feff1f2f
JB		 1007
1008 return TX_CONTINUE;
1009}
1010
d9e8a70f 1011static ieee80211_tx_result debug_noinline
e2454948
JB		 1012ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1013{
1014 if (!tx->key)
1015 return TX_CONTINUE;
1016
97359d12
JB		 1017 switch (tx->key->conf.cipher) {
1018 case WLAN_CIPHER_SUITE_WEP40:
1019 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1020 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1021 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1022 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1023 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1024 return ieee80211_crypto_ccmp_encrypt(
1025 tx, IEEE80211_CCMP_MIC_LEN);
1026 case WLAN_CIPHER_SUITE_CCMP_256:
1027 return ieee80211_crypto_ccmp_encrypt(
1028 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1029 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1030 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1031 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1032 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1033 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1034 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1035 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1036 case WLAN_CIPHER_SUITE_GCMP:
1037 case WLAN_CIPHER_SUITE_GCMP_256:
1038 return ieee80211_crypto_gcmp_encrypt(tx);
3ffc2a90 1039 default:
d32a1028 1040 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1041 }
1042
e2454948
JB		 1043 return TX_DROP;
1044}
1045
d9e8a70f 1046static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1047ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1048{
252b86c4 1049 struct sk_buff *skb;
2de8e0d9
JB		 1050 struct ieee80211_hdr *hdr;
1051 int next_len;
1052 bool group_addr;
03f93c3d 1053
252b86c4 1054 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1055 hdr = (void *) skb->data;
7e0aae47
JM		 1056 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1057 break; /* must not overwrite AID */
252b86c4
JB		 1058 if (!skb_queue_is_last(&tx->skbs, skb)) {
1059 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1060 next_len = next->len;
1061 } else
1062 next_len = 0;
2de8e0d9 1063 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1064
2de8e0d9 1065 hdr->duration_id =
252b86c4
JB		 1066 ieee80211_duration(tx, skb, group_addr, next_len);
1067 }
03f93c3d
JB		 1068
1069 return TX_CONTINUE;
1070}
1071
e2ebc74d
JB		 1072/* actual transmit path */
1073
a622ab72
JB		 1074static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1075 struct sk_buff *skb,
1076 struct ieee80211_tx_info *info,
1077 struct tid_ampdu_tx *tid_tx,
1078 int tid)
1079{
1080 bool queued = false;
285fa695 1081 bool reset_agg_timer = false;
aa454580 1082 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1083
1084 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1085 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1086 reset_agg_timer = true;
0ab33703
JB		 1087 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1088 /*
1089 * nothing -- this aggregation session is being started
1090 * but that might still fail with the driver
1091 */
ba8c3d6f 1092 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1093 spin_lock(&tx->sta->lock);
1094 /*
1095 * Need to re-check now, because we may get here
1096 *
1097 * 1) in the window during which the setup is actually
1098 * already done, but not marked yet because not all
1099 * packets are spliced over to the driver pending
1100 * queue yet -- if this happened we acquire the lock
1101 * either before or after the splice happens, but
1102 * need to recheck which of these cases happened.
1103 *
1104 * 2) during session teardown, if the OPERATIONAL bit
1105 * was cleared due to the teardown but the pointer
1106 * hasn't been assigned NULL yet (or we loaded it
1107 * before it was assigned) -- in this case it may
1108 * now be NULL which means we should just let the
1109 * packet pass through because splicing the frames
1110 * back is already done.
1111 */
40b275b6 1112 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1113
1114 if (!tid_tx) {
1115 /* do nothing, let packet pass through */
1116 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1117 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1118 reset_agg_timer = true;
a622ab72
JB		 1119 } else {
1120 queued = true;
f6d4671a
EG		 1121 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1122 clear_sta_flag(tx->sta, WLAN_STA_SP);
1123 ps_dbg(tx->sta->sdata,
1124 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1125 tx->sta->sta.addr, tx->sta->sta.aid);
1126 }
a622ab72
JB		 1127 info->control.vif = &tx->sdata->vif;
1128 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
facde7f3 1129 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1130 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1131 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1132 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1133 }
1134 spin_unlock(&tx->sta->lock);
aa454580
HS		 1135
1136 if (purge_skb)
c3e7724b 1137 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1138 }
1139
285fa695 1140 /* reset session timer */
914eac24 1141 if (reset_agg_timer)
12d3952f 1142 tid_tx->last_tx = jiffies;
285fa695 1143
a622ab72
JB		 1144 return queued;
1145}
1146
58d4185e
JB		 1147/*
1148 * initialises @tx
7c10770f
JB		 1149 * pass %NULL for the station if unknown, a valid pointer if known
1150 * or an ERR_PTR() if the station is known not to exist
58d4185e 1151 */
9ae54c84 1152static ieee80211_tx_result
3b8d81e0
JB		 1153ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1154 struct ieee80211_tx_data *tx,
7c10770f 1155 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1156{
3b8d81e0 1157 struct ieee80211_local *local = sdata->local;
58d4185e 1158 struct ieee80211_hdr *hdr;
e039fa4a 1159 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1160 int tid;
e2ebc74d
JB		 1161
1162 memset(tx, 0, sizeof(*tx));
1163 tx->skb = skb;
e2ebc74d 1164 tx->local = local;
3b8d81e0 1165 tx->sdata = sdata;
252b86c4 1166 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1167
cd8ffc80
JB		 1168 /*
1169 * If this flag is set to true anywhere, and we get here,
1170 * we are doing the needed processing, so remove the flag
1171 * now.
1172 */
1173 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1174
58d4185e
JB		 1175 hdr = (struct ieee80211_hdr *) skb->data;
1176
7c10770f
JB		 1177 if (likely(sta)) {
1178 if (!IS_ERR(sta))
1179 tx->sta = sta;
1180 } else {
1181 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1182 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1183 if (!tx->sta && sdata->wdev.use_4addr)
1184 return TX_DROP;
1185 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1186 IEEE80211_TX_CTL_INJECTED) ||
1187 tx->sdata->control_port_protocol == tx->skb->protocol) {
1188 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1189 }
1190 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1191 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1192 }
58d4185e 1193
cd8ffc80 1194 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1195 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1196 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1197 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1198 struct tid_ampdu_tx *tid_tx;
1199
a1f2ba04 1200 tid = ieee80211_get_tid(hdr);
8b30b1fe 1201
a622ab72
JB		 1202 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1203 if (tid_tx) {
1204 bool queued;
cd8ffc80 1205
a622ab72
JB		 1206 queued = ieee80211_tx_prep_agg(tx, skb, info,
1207 tid_tx, tid);
1208
1209 if (unlikely(queued))
1210 return TX_QUEUED;
1211 }
8b30b1fe
S		 1212 }
1213
badffb72 1214 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1215 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1216 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1217 } else
5cf121c3 1218 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1219
a26eb27a
JB		 1220 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1221 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1222 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1223 info->flags & IEEE80211_TX_CTL_AMPDU)
1224 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1225 }
1226
e2ebc74d 1227 if (!tx->sta)
e039fa4a 1228 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1229 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1230 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1231 ieee80211_check_fast_xmit(tx->sta);
1232 }
58d4185e 1233
e039fa4a 1234 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1235
9ae54c84 1236 return TX_CONTINUE;
e2ebc74d
JB		 1237}
1238
80a83cfc
MK		 1239static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1240 struct ieee80211_vif *vif,
dbef5362 1241 struct sta_info *sta,
80a83cfc 1242 struct sk_buff *skb)
ba8c3d6f
FF		 1243{
1244 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1245 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1246 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1247
c3732a7b
FF		 1248 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1249 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1250 return NULL;
ba8c3d6f 1251
0832b603 1252 if (!ieee80211_is_data_present(hdr->frame_control))
80a83cfc 1253 return NULL;
ba8c3d6f 1254
dbef5362 1255 if (sta) {
ba8c3d6f
FF		 1256 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1257
dbef5362
MK		 1258 if (!sta->uploaded)
1259 return NULL;
1260
1261 txq = sta->sta.txq[tid];
ba8c3d6f
FF		 1262 } else if (vif) {
1263 txq = vif->txq;
1264 }
1265
1266 if (!txq)
80a83cfc 1267 return NULL;
ba8c3d6f 1268
80a83cfc
MK		 1269 return to_txq_info(txq);
1270}
ba8c3d6f 1271
5caa328e
MK		 1272static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1273{
1274 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1275}
1276
5caa328e
MK		 1277static u32 codel_skb_len_func(const struct sk_buff *skb)
1278{
1279 return skb->len;
1280}
1281
1282static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1283{
1284 const struct ieee80211_tx_info *info;
1285
1286 info = (const struct ieee80211_tx_info *)skb->cb;
1287 return info->control.enqueue_time;
1288}
1289
1290static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1291 void *ctx)
1292{
1293 struct ieee80211_local *local;
1294 struct txq_info *txqi;
1295 struct fq *fq;
1296 struct fq_flow *flow;
1297
1298 txqi = ctx;
1299 local = vif_to_sdata(txqi->txq.vif)->local;
1300 fq = &local->fq;
1301
1302 if (cvars == &txqi->def_cvars)
1303 flow = &txqi->def_flow;
1304 else
1305 flow = &fq->flows[cvars - local->cvars];
1306
1307 return fq_flow_dequeue(fq, flow);
1308}
1309
1310static void codel_drop_func(struct sk_buff *skb,
1311 void *ctx)
1312{
1313 struct ieee80211_local *local;
1314 struct ieee80211_hw *hw;
1315 struct txq_info *txqi;
1316
1317 txqi = ctx;
1318 local = vif_to_sdata(txqi->txq.vif)->local;
1319 hw = &local->hw;
1320
1321 ieee80211_free_txskb(hw, skb);
1322}
1323
fa962b92
MK		 1324static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1325 struct fq_tin *tin,
1326 struct fq_flow *flow)
1327{
5caa328e
MK		 1328 struct ieee80211_local *local;
1329 struct txq_info *txqi;
1330 struct codel_vars *cvars;
1331 struct codel_params *cparams;
1332 struct codel_stats *cstats;
1333
1334 local = container_of(fq, struct ieee80211_local, fq);
1335 txqi = container_of(tin, struct txq_info, tin);
8d51dbb8 1336 cstats = &txqi->cstats;
5caa328e 1337
484a54c2
THJ		 1338 if (txqi->txq.sta) {
1339 struct sta_info *sta = container_of(txqi->txq.sta,
1340 struct sta_info, sta);
1341 cparams = &sta->cparams;
1342 } else {
1343 cparams = &local->cparams;
1344 }
1345
5caa328e
MK		 1346 if (flow == &txqi->def_flow)
1347 cvars = &txqi->def_cvars;
1348 else
1349 cvars = &local->cvars[flow - fq->flows];
1350
1351 return codel_dequeue(txqi,
1352 &flow->backlog,
1353 cparams,
1354 cvars,
1355 cstats,
1356 codel_skb_len_func,
1357 codel_skb_time_func,
1358 codel_drop_func,
1359 codel_dequeue_func);
fa962b92
MK		 1360}
1361
1362static void fq_skb_free_func(struct fq *fq,
1363 struct fq_tin *tin,
1364 struct fq_flow *flow,
1365 struct sk_buff *skb)
1366{
1367 struct ieee80211_local *local;
1368
1369 local = container_of(fq, struct ieee80211_local, fq);
1370 ieee80211_free_txskb(&local->hw, skb);
1371}
1372
1373static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1374 struct fq_tin *tin,
1375 int idx,
1376 struct sk_buff *skb)
1377{
1378 struct txq_info *txqi;
1379
1380 txqi = container_of(tin, struct txq_info, tin);
1381 return &txqi->def_flow;
1382}
1383
80a83cfc
MK		 1384static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1385 struct txq_info *txqi,
1386 struct sk_buff *skb)
1387{
fa962b92
MK		 1388 struct fq *fq = &local->fq;
1389 struct fq_tin *tin = &txqi->tin;
f2ac7e30 1390
5caa328e 1391 ieee80211_set_skb_enqueue_time(skb);
fa962b92
MK		 1392 fq_tin_enqueue(fq, tin, skb,
1393 fq_skb_free_func,
1394 fq_flow_get_default_func);
1395}
ba8c3d6f 1396
2a9e2579
JB		 1397static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1398 struct fq_flow *flow, struct sk_buff *skb,
1399 void *data)
1400{
1401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1402
1403 return info->control.vif == data;
1404}
1405
1406void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1407 struct ieee80211_sub_if_data *sdata)
1408{
1409 struct fq *fq = &local->fq;
1410 struct txq_info *txqi;
1411 struct fq_tin *tin;
1412 struct ieee80211_sub_if_data *ap;
1413
1414 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1415 return;
1416
1417 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1418
1419 if (!ap->vif.txq)
1420 return;
1421
1422 txqi = to_txq_info(ap->vif.txq);
1423 tin = &txqi->tin;
1424
1425 spin_lock_bh(&fq->lock);
1426 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1427 fq_skb_free_func);
1428 spin_unlock_bh(&fq->lock);
1429}
1430
fa962b92
MK		 1431void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1432 struct sta_info *sta,
1433 struct txq_info *txqi, int tid)
1434{
1435 fq_tin_init(&txqi->tin);
1436 fq_flow_init(&txqi->def_flow);
5caa328e 1437 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1438 codel_stats_init(&txqi->cstats);
bb42f2d1 1439 __skb_queue_head_init(&txqi->frags);
fa962b92
MK		 1440
1441 txqi->txq.vif = &sdata->vif;
1442
1443 if (sta) {
1444 txqi->txq.sta = &sta->sta;
1445 sta->sta.txq[tid] = &txqi->txq;
1446 txqi->txq.tid = tid;
731977e9 1447 txqi->txq.ac = ieee80211_ac_from_tid(tid);
fa962b92
MK		 1448 } else {
1449 sdata->vif.txq = &txqi->txq;
1450 txqi->txq.tid = 0;
1451 txqi->txq.ac = IEEE80211_AC_BE;
80a83cfc 1452 }
fa962b92 1453}
ba8c3d6f 1454
fa962b92
MK		 1455void ieee80211_txq_purge(struct ieee80211_local *local,
1456 struct txq_info *txqi)
1457{
1458 struct fq *fq = &local->fq;
1459 struct fq_tin *tin = &txqi->tin;
1460
1461 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1462 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
fa962b92
MK		 1463}
1464
2fe4a29a
THJ		 1465void ieee80211_txq_set_params(struct ieee80211_local *local)
1466{
1467 if (local->hw.wiphy->txq_limit)
1468 local->fq.limit = local->hw.wiphy->txq_limit;
1469 else
1470 local->hw.wiphy->txq_limit = local->fq.limit;
1471
1472 if (local->hw.wiphy->txq_memory_limit)
1473 local->fq.memory_limit = local->hw.wiphy->txq_memory_limit;
1474 else
1475 local->hw.wiphy->txq_memory_limit = local->fq.memory_limit;
1476
1477 if (local->hw.wiphy->txq_quantum)
1478 local->fq.quantum = local->hw.wiphy->txq_quantum;
1479 else
1480 local->hw.wiphy->txq_quantum = local->fq.quantum;
1481}
1482
fa962b92
MK		 1483int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1484{
1485 struct fq *fq = &local->fq;
1486 int ret;
5caa328e 1487 int i;
3ff23cd5
THJ		 1488 bool supp_vht = false;
1489 enum nl80211_band band;
fa962b92
MK		 1490
1491 if (!local->ops->wake_tx_queue)
1492 return 0;
1493
1494 ret = fq_init(fq, 4096);
1495 if (ret)
1496 return ret;
1497
3ff23cd5
THJ		 1498 /*
1499 * If the hardware doesn't support VHT, it is safe to limit the maximum
1500 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1501 */
1502 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1503 struct ieee80211_supported_band *sband;
1504
1505 sband = local->hw.wiphy->bands[band];
1506 if (!sband)
1507 continue;
1508
1509 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1510 }
1511
1512 if (!supp_vht)
1513 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1514
5caa328e 1515 codel_params_init(&local->cparams);
5caa328e
MK		 1516 local->cparams.interval = MS2TIME(100);
1517 local->cparams.target = MS2TIME(20);
1518 local->cparams.ecn = true;
1519
1520 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1521 GFP_KERNEL);
1522 if (!local->cvars) {
59a7c828 1523 spin_lock_bh(&fq->lock);
5caa328e 1524 fq_reset(fq, fq_skb_free_func);
59a7c828 1525 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1526 return -ENOMEM;
1527 }
1528
1529 for (i = 0; i < fq->flows_cnt; i++)
1530 codel_vars_init(&local->cvars[i]);
1531
2fe4a29a
THJ		 1532 ieee80211_txq_set_params(local);
1533
fa962b92
MK		 1534 return 0;
1535}
1536
1537void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1538{
1539 struct fq *fq = &local->fq;
1540
1541 if (!local->ops->wake_tx_queue)
1542 return;
1543
5caa328e
MK		 1544 kfree(local->cvars);
1545 local->cvars = NULL;
1546
59a7c828 1547 spin_lock_bh(&fq->lock);
fa962b92 1548 fq_reset(fq, fq_skb_free_func);
59a7c828 1549 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1550}
1551
bb42f2d1
THJ		 1552static bool ieee80211_queue_skb(struct ieee80211_local *local,
1553 struct ieee80211_sub_if_data *sdata,
1554 struct sta_info *sta,
1555 struct sk_buff *skb)
1556{
bb42f2d1
THJ		 1557 struct fq *fq = &local->fq;
1558 struct ieee80211_vif *vif;
1559 struct txq_info *txqi;
bb42f2d1
THJ		 1560
1561 if (!local->ops->wake_tx_queue ||
1562 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1563 return false;
1564
bb42f2d1
THJ		 1565 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1566 sdata = container_of(sdata->bss,
1567 struct ieee80211_sub_if_data, u.ap);
1568
1569 vif = &sdata->vif;
dbef5362 1570 txqi = ieee80211_get_txq(local, vif, sta, skb);
bb42f2d1
THJ		 1571
1572 if (!txqi)
1573 return false;
1574
bb42f2d1
THJ		 1575 spin_lock_bh(&fq->lock);
1576 ieee80211_txq_enqueue(local, txqi, skb);
1577 spin_unlock_bh(&fq->lock);
1578
e7881bd5 1579 drv_wake_tx_queue(local, txqi);
bb42f2d1
THJ		 1580
1581 return true;
1582}
1583
11127e91
JB		 1584static bool ieee80211_tx_frags(struct ieee80211_local *local,
1585 struct ieee80211_vif *vif,
1586 struct ieee80211_sta *sta,
1587 struct sk_buff_head *skbs,
1588 bool txpending)
e2ebc74d 1589{
80a83cfc 1590 struct ieee80211_tx_control control = {};
252b86c4 1591 struct sk_buff *skb, *tmp;
3b8d81e0 1592 unsigned long flags;
e2ebc74d 1593
252b86c4 1594 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1595 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1596 int q = info->hw_queue;
1597
1598#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1599 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1600 __skb_unlink(skb, skbs);
c3e7724b 1601 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1602 continue;
1603 }
1604#endif
3b8d81e0
JB		 1605
1606 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1607 if (local->queue_stop_reasons[q] ||
7bb45683 1608 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1609 if (unlikely(info->flags &
a7679ed5
SF		 1610 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1611 if (local->queue_stop_reasons[q] &
1612 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1613 /*
1614 * Drop off-channel frames if queues
1615 * are stopped for any reason other
1616 * than off-channel operation. Never
1617 * queue them.
1618 */
1619 spin_unlock_irqrestore(
1620 &local->queue_stop_reason_lock,
1621 flags);
1622 ieee80211_purge_tx_queue(&local->hw,
1623 skbs);
1624 return true;
1625 }
1626 } else {
1627
6c17b77b 1628 /*
a7679ed5
SF		 1629 * Since queue is stopped, queue up frames for
1630 * later transmission from the tx-pending
1631 * tasklet when the queue is woken again.
6c17b77b 1632 */
a7679ed5
SF		 1633 if (txpending)
1634 skb_queue_splice_init(skbs,
1635 &local->pending[q]);
1636 else
1637 skb_queue_splice_tail_init(skbs,
1638 &local->pending[q]);
1639
1640 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1641 flags);
1642 return false;
6c17b77b 1643 }
7bb45683 1644 }
3b8d81e0 1645 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1646
11127e91 1647 info->control.vif = vif;
80a83cfc 1648 control.sta = sta;
f0e72851 1649
11127e91 1650 __skb_unlink(skb, skbs);
80a83cfc 1651 drv_tx(local, &control, skb);
11127e91 1652 }
5061b0c2 1653
11127e91
JB		 1654 return true;
1655}
1656
1657/*
1658 * Returns false if the frame couldn't be transmitted but was queued instead.
1659 */
1660static bool __ieee80211_tx(struct ieee80211_local *local,
1661 struct sk_buff_head *skbs, int led_len,
1662 struct sta_info *sta, bool txpending)
1663{
1664 struct ieee80211_tx_info *info;
1665 struct ieee80211_sub_if_data *sdata;
1666 struct ieee80211_vif *vif;
1667 struct ieee80211_sta *pubsta;
1668 struct sk_buff *skb;
1669 bool result = true;
1670 __le16 fc;
5061b0c2 1671
11127e91
JB		 1672 if (WARN_ON(skb_queue_empty(skbs)))
1673 return true;
ec25acc4 1674
11127e91
JB		 1675 skb = skb_peek(skbs);
1676 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1677 info = IEEE80211_SKB_CB(skb);
1678 sdata = vif_to_sdata(info->control.vif);
1679 if (sta && !sta->uploaded)
1680 sta = NULL;
1681
1682 if (sta)
1683 pubsta = &sta->sta;
1684 else
1685 pubsta = NULL;
1686
1687 switch (sdata->vif.type) {
1688 case NL80211_IFTYPE_MONITOR:
d8212184 1689 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1690 vif = &sdata->vif;
1691 break;
1692 }
4b6f1dd6 1693 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1694 if (sdata) {
4b6f1dd6 1695 vif = &sdata->vif;
3a25a8c8
JB		 1696 info->hw_queue =
1697 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1698 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1699 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1700 return true;
1701 } else
4b6f1dd6 1702 vif = NULL;
11127e91
JB		 1703 break;
1704 case NL80211_IFTYPE_AP_VLAN:
1705 sdata = container_of(sdata->bss,
1706 struct ieee80211_sub_if_data, u.ap);
1707 /* fall through */
1708 default:
1709 vif = &sdata->vif;
1710 break;
e2ebc74d 1711 }
2de8e0d9 1712
cb831b53
JB		 1713 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1714 txpending);
11127e91 1715
74e4dbfd 1716 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1717
4db4e0a1 1718 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1719
11127e91 1720 return result;
e2ebc74d
JB		 1721}
1722
97b045d6
JB		 1723/*
1724 * Invoke TX handlers, return 0 on success and non-zero if the
1725 * frame was dropped or queued.
bb42f2d1
THJ		 1726 *
1727 * The handlers are split into an early and late part. The latter is everything
1728 * that can be sensitive to reordering, and will be deferred to after packets
1729 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1730 */
bb42f2d1 1731static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1732{
97b045d6 1733 ieee80211_tx_result res = TX_DROP;
97b045d6 1734
9aa4aee3
JB		 1735#define CALL_TXH(txh) \
1736 do { \
1737 res = txh(tx); \
1738 if (res != TX_CONTINUE) \
1739 goto txh_done; \
1740 } while (0)
1741
5c1b98a5 1742 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1743 CALL_TXH(ieee80211_tx_h_check_assoc);
1744 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1745 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1746 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1747 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1748 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1749
bb42f2d1
THJ		 1750 txh_done:
1751 if (unlikely(res == TX_DROP)) {
1752 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1753 if (tx->skb)
1754 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1755 else
1756 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1757 return -1;
1758 } else if (unlikely(res == TX_QUEUED)) {
1759 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1760 return -1;
1761 }
1762
1763 return 0;
1764}
1765
1766/*
1767 * Late handlers can be called while the sta lock is held. Handlers that can
1768 * cause packets to be generated will cause deadlock!
1769 */
1770static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1771{
1772 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1773 ieee80211_tx_result res = TX_CONTINUE;
1774
aa5b5492
JB		 1775 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1776 __skb_queue_tail(&tx->skbs, tx->skb);
1777 tx->skb = NULL;
c6fcf6bc 1778 goto txh_done;
aa5b5492 1779 }
c6fcf6bc
JB		 1780
1781 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1782 CALL_TXH(ieee80211_tx_h_sequence);
1783 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1784 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1785 CALL_TXH(ieee80211_tx_h_stats);
1786 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1787 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1788 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1789#undef CALL_TXH
97b045d6 1790
d9e8a70f 1791 txh_done:
97b045d6 1792 if (unlikely(res == TX_DROP)) {
5479d0e7 1793 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1794 if (tx->skb)
c3e7724b 1795 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1796 else
1f98ab7f 1797 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1798 return -1;
1799 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1800 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1801 return -1;
1802 }
1803
1804 return 0;
1805}
1806
bb42f2d1
THJ		 1807static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1808{
1809 int r = invoke_tx_handlers_early(tx);
1810
1811 if (r)
1812 return r;
1813 return invoke_tx_handlers_late(tx);
1814}
1815
06be6b14
FF		 1816bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1817 struct ieee80211_vif *vif, struct sk_buff *skb,
1818 int band, struct ieee80211_sta **sta)
1819{
1820 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1821 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1822 struct ieee80211_tx_data tx;
88724a81 1823 struct sk_buff *skb2;
06be6b14 1824
7c10770f 1825 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1826 return false;
1827
1828 info->band = band;
1829 info->control.vif = vif;
1830 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1831
1832 if (invoke_tx_handlers(&tx))
1833 return false;
1834
1835 if (sta) {
1836 if (tx.sta)
1837 *sta = &tx.sta->sta;
1838 else
1839 *sta = NULL;
1840 }
1841
88724a81
JB		 1842 /* this function isn't suitable for fragmented data frames */
1843 skb2 = __skb_dequeue(&tx.skbs);
1844 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1845 ieee80211_free_txskb(hw, skb2);
1846 ieee80211_purge_tx_queue(hw, &tx.skbs);
1847 return false;
1848 }
1849
06be6b14
FF		 1850 return true;
1851}
1852EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1853
7bb45683
JB		 1854/*
1855 * Returns false if the frame couldn't be transmitted but was queued instead.
1856 */
1857static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f 1858 struct sta_info *sta, struct sk_buff *skb,
b9771d41 1859 bool txpending, u32 txdata_flags)
e2ebc74d 1860{
3b8d81e0 1861 struct ieee80211_local *local = sdata->local;
5cf121c3 1862 struct ieee80211_tx_data tx;
97b045d6 1863 ieee80211_tx_result res_prepare;
e039fa4a 1864 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1865 bool result = true;
74e4dbfd 1866 int led_len;
e2ebc74d 1867
e2ebc74d
JB		 1868 if (unlikely(skb->len < 10)) {
1869 dev_kfree_skb(skb);
7bb45683 1870 return true;
e2ebc74d
JB		 1871 }
1872
58d4185e 1873 /* initialises tx */
74e4dbfd 1874 led_len = skb->len;
7c10770f 1875 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1876
b9771d41
JB		 1877 tx.flags |= txdata_flags;
1878
cd8ffc80 1879 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1880 ieee80211_free_txskb(&local->hw, skb);
55de908a 1881 return true;
cd8ffc80 1882 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1883 return true;
e2ebc74d
JB		 1884 }
1885
3a25a8c8
JB		 1886 /* set up hw_queue value early */
1887 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1888 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1889 info->hw_queue =
1890 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1891
bb42f2d1
THJ		 1892 if (invoke_tx_handlers_early(&tx))
1893 return false;
1894
1895 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1896 return true;
1897
1898 if (!invoke_tx_handlers_late(&tx))
74e4dbfd
JB		 1899 result = __ieee80211_tx(local, &tx.skbs, led_len,
1900 tx.sta, txpending);
55de908a 1901
7bb45683 1902 return result;
e2ebc74d
JB		 1903}
1904
1905/* device xmit handlers */
1906
3bff1865 1907static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1908 struct sk_buff *skb,
1909 int head_need, bool may_encrypt)
1910{
3bff1865 1911 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1912 int tail_need = 0;
1913
3bff1865 1914 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1915 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1916 tail_need -= skb_tailroom(skb);
1917 tail_need = max_t(int, tail_need, 0);
1918 }
1919
c70f59a2 1920 if (skb_cloned(skb) &&
30686bf7 1921 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
c70f59a2 1922 !skb_clone_writable(skb, ETH_HLEN) ||
17c18bf8 1923 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
23c0752a 1924 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1925 else if (head_need || tail_need)
23c0752a 1926 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1927 else
1928 return 0;
23c0752a
JB		 1929
1930 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1931 wiphy_debug(local->hw.wiphy,
1932 "failed to reallocate TX buffer\n");
23c0752a
JB		 1933 return -ENOMEM;
1934 }
1935
23c0752a
JB		 1936 return 0;
1937}
1938
7c10770f 1939void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
b9771d41
JB		 1940 struct sta_info *sta, struct sk_buff *skb,
1941 u32 txdata_flags)
e2ebc74d 1942{
3b8d81e0 1943 struct ieee80211_local *local = sdata->local;
e039fa4a 1944 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
11b05ba3 1945 struct ieee80211_hdr *hdr;
e2ebc74d 1946 int headroom;
23c0752a 1947 bool may_encrypt;
e2ebc74d 1948
3b8d81e0 1949 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1950
3b8d81e0 1951 headroom = local->tx_headroom;
23c0752a 1952 if (may_encrypt)
2475b1cc 1953 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1954 headroom -= skb_headroom(skb);
1955 headroom = max_t(int, 0, headroom);
1956
3bff1865 1957 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1958 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1959 return;
e2ebc74d
JB		 1960 }
1961
740c1aa3 1962 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1963 info->control.vif = &sdata->vif;
e2ebc74d 1964
3f52b7e3
MP		 1965 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1966 if (ieee80211_is_data(hdr->frame_control) &&
1967 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1968 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1969 return; /* skb queued: don't free */
1970 } else {
1971 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1972 }
98aed9fd 1973 }
cca89496 1974
2154c81c 1975 ieee80211_set_qos_hdr(sdata, skb);
b9771d41 1976 ieee80211_tx(sdata, sta, skb, false, txdata_flags);
e2ebc74d
JB		 1977}
1978
dfdfc2be
SE		 1979static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1980 struct sk_buff *skb)
73b9f03a
JB		 1981{
1982 struct ieee80211_radiotap_iterator iterator;
1983 struct ieee80211_radiotap_header *rthdr =
1984 (struct ieee80211_radiotap_header *) skb->data;
1985 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 1986 struct ieee80211_supported_band *sband =
1987 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 1988 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1989 NULL);
1990 u16 txflags;
dfdfc2be
SE		 1991 u16 rate = 0;
1992 bool rate_found = false;
1993 u8 rate_retries = 0;
1994 u16 rate_flags = 0;
f66b60f6 1995 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 1996 u16 vht_known;
1997 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 1998 int i;
73b9f03a
JB		 1999
2000 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
2001 IEEE80211_TX_CTL_DONTFRAG;
2002
2003 /*
2004 * for every radiotap entry that is present
2005 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
2006 * entries present, or -EINVAL on error)
2007 */
2008
2009 while (!ret) {
2010 ret = ieee80211_radiotap_iterator_next(&iterator);
2011
2012 if (ret)
2013 continue;
2014
2015 /* see if this argument is something we can use */
2016 switch (iterator.this_arg_index) {
2017 /*
2018 * You must take care when dereferencing iterator.this_arg
2019 * for multibyte types... the pointer is not aligned. Use
2020 * get_unaligned((type *)iterator.this_arg) to dereference
2021 * iterator.this_arg for type "type" safely on all arches.
2022 */
2023 case IEEE80211_RADIOTAP_FLAGS:
2024 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2025 /*
2026 * this indicates that the skb we have been
2027 * handed has the 32-bit FCS CRC at the end...
2028 * we should react to that by snipping it off
2029 * because it will be recomputed and added
2030 * on transmission
2031 */
2032 if (skb->len < (iterator._max_length + FCS_LEN))
2033 return false;
2034
2035 skb_trim(skb, skb->len - FCS_LEN);
2036 }
2037 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2038 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2039 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2040 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2041 break;
2042
2043 case IEEE80211_RADIOTAP_TX_FLAGS:
2044 txflags = get_unaligned_le16(iterator.this_arg);
2045 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2046 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2047 break;
2048
dfdfc2be
SE		 2049 case IEEE80211_RADIOTAP_RATE:
2050 rate = *iterator.this_arg;
2051 rate_flags = 0;
2052 rate_found = true;
2053 break;
2054
2055 case IEEE80211_RADIOTAP_DATA_RETRIES:
2056 rate_retries = *iterator.this_arg;
2057 break;
2058
2059 case IEEE80211_RADIOTAP_MCS:
2060 mcs_known = iterator.this_arg[0];
2061 mcs_flags = iterator.this_arg[1];
2062 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2063 break;
2064
2065 rate_found = true;
2066 rate = iterator.this_arg[2];
2067 rate_flags = IEEE80211_TX_RC_MCS;
2068
2069 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2070 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2071 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2072
f66b60f6 2073 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2074 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2075 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 2076 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2077 break;
2078
646e76bb
LB		 2079 case IEEE80211_RADIOTAP_VHT:
2080 vht_known = get_unaligned_le16(iterator.this_arg);
2081 rate_found = true;
2082
2083 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2084 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2085 (iterator.this_arg[2] &
2086 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2087 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2088 if (vht_known &
2089 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2090 if (iterator.this_arg[3] == 1)
2091 rate_flags |=
2092 IEEE80211_TX_RC_40_MHZ_WIDTH;
2093 else if (iterator.this_arg[3] == 4)
2094 rate_flags |=
2095 IEEE80211_TX_RC_80_MHZ_WIDTH;
2096 else if (iterator.this_arg[3] == 11)
2097 rate_flags |=
2098 IEEE80211_TX_RC_160_MHZ_WIDTH;
2099 }
2100
2101 vht_mcs = iterator.this_arg[4] >> 4;
2102 vht_nss = iterator.this_arg[4] & 0xF;
2103 break;
2104
73b9f03a
JB		 2105 /*
2106 * Please update the file
2107 * Documentation/networking/mac80211-injection.txt
2108 * when parsing new fields here.
2109 */
2110
2111 default:
2112 break;
2113 }
2114 }
2115
2116 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2117 return false;
2118
dfdfc2be
SE		 2119 if (rate_found) {
2120 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2121
2122 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2123 info->control.rates[i].idx = -1;
2124 info->control.rates[i].flags = 0;
2125 info->control.rates[i].count = 0;
2126 }
2127
2128 if (rate_flags & IEEE80211_TX_RC_MCS) {
2129 info->control.rates[0].idx = rate;
646e76bb
LB		 2130 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2131 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2132 vht_nss);
dfdfc2be
SE		 2133 } else {
2134 for (i = 0; i < sband->n_bitrates; i++) {
2135 if (rate * 5 != sband->bitrates[i].bitrate)
2136 continue;
2137
2138 info->control.rates[0].idx = i;
2139 break;
2140 }
2141 }
2142
07310a63
FF		 2143 if (info->control.rates[0].idx < 0)
2144 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2145
dfdfc2be
SE		 2146 info->control.rates[0].flags = rate_flags;
2147 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2148 local->hw.max_rate_tries);
2149 }
2150
73b9f03a
JB		 2151 /*
2152 * remove the radiotap header
2153 * iterator->_max_length was sanity-checked against
2154 * skb->len by iterator init
2155 */
2156 skb_pull(skb, iterator._max_length);
2157
2158 return true;
2159}
2160
d0cf9c0d
SH		 2161netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2162 struct net_device *dev)
e2ebc74d
JB		 2163{
2164 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2165 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2166 struct ieee80211_radiotap_header *prthdr =
2167 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2168 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2169 struct ieee80211_hdr *hdr;
5d9cf4a5 2170 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2171 struct cfg80211_chan_def *chandef;
9b8a74e3 2172 u16 len_rthdr;
5d9cf4a5 2173 int hdrlen;
e2ebc74d 2174
9b8a74e3
AG		 2175 /* check for not even having the fixed radiotap header part */
2176 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2177 goto fail; /* too short to be possibly valid */
2178
2179 /* is it a header version we can trust to find length from? */
2180 if (unlikely(prthdr->it_version))
2181 goto fail; /* only version 0 is supported */
2182
2183 /* then there must be a radiotap header with a length we can use */
2184 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2185
2186 /* does the skb contain enough to deliver on the alleged length? */
2187 if (unlikely(skb->len < len_rthdr))
2188 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2189
e2ebc74d
JB		 2190 /*
2191 * fix up the pointers accounting for the radiotap
2192 * header still being in there. We are being given
2193 * a precooked IEEE80211 header so no need for
2194 * normal processing
2195 */
9b8a74e3 2196 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2197 /*
9b8a74e3
AG		 2198 * these are just fixed to the end of the rt area since we
2199 * don't have any better information and at this point, nobody cares
e2ebc74d 2200 */
9b8a74e3
AG		 2201 skb_set_network_header(skb, len_rthdr);
2202 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2203
5d9cf4a5
JB		 2204 if (skb->len < len_rthdr + 2)
2205 goto fail;
2206
2207 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2208 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2209
2210 if (skb->len < len_rthdr + hdrlen)
2211 goto fail;
2212
f75f5c6f
HS		 2213 /*
2214 * Initialize skb->protocol if the injected frame is a data frame
2215 * carrying a rfc1042 header
2216 */
5d9cf4a5
JB		 2217 if (ieee80211_is_data(hdr->frame_control) &&
2218 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2219 u8 *payload = (u8 *)hdr + hdrlen;
2220
b203ca39 2221 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2222 skb->protocol = cpu_to_be16((payload[6] << 8) |
2223 payload[7]);
f75f5c6f
HS		 2224 }
2225
3b8d81e0
JB		 2226 memset(info, 0, sizeof(*info));
2227
5d9cf4a5 2228 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2229 IEEE80211_TX_CTL_INJECTED;
2230
5d9cf4a5
JB		 2231 rcu_read_lock();
2232
2233 /*
2234 * We process outgoing injected frames that have a local address
2235 * we handle as though they are non-injected frames.
2236 * This code here isn't entirely correct, the local MAC address
2237 * isn't always enough to find the interface to use; for proper
2238 * VLAN/WDS support we will need a different mechanism (which
2239 * likely isn't going to be monitor interfaces).
2240 */
2241 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2242
2243 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2244 if (!ieee80211_sdata_running(tmp_sdata))
2245 continue;
2246 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2247 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2248 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2249 continue;
b203ca39 2250 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2251 sdata = tmp_sdata;
2252 break;
2253 }
2254 }
7351c6bd 2255
55de908a
JB		 2256 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2257 if (!chanctx_conf) {
2258 tmp_sdata = rcu_dereference(local->monitor_sdata);
2259 if (tmp_sdata)
2260 chanctx_conf =
2261 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2262 }
55de908a 2263
b4a7ff75 2264 if (chanctx_conf)
b4932836 2265 chandef = &chanctx_conf->def;
b4a7ff75 2266 else if (!local->use_chanctx)
b4932836 2267 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2268 else
2269 goto fail_rcu;
55de908a
JB		 2270
2271 /*
2272 * Frame injection is not allowed if beaconing is not allowed
2273 * or if we need radar detection. Beaconing is usually not allowed when
2274 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2275 * Passive scan is also used in world regulatory domains where
2276 * your country is not known and as such it should be treated as
2277 * NO TX unless the channel is explicitly allowed in which case
2278 * your current regulatory domain would not have the passive scan
2279 * flag.
2280 *
2281 * Since AP mode uses monitor interfaces to inject/TX management
2282 * frames we can make AP mode the exception to this rule once it
2283 * supports radar detection as its implementation can deal with
2284 * radar detection by itself. We can do that later by adding a
2285 * monitor flag interfaces used for AP support.
2286 */
b4932836
JD		 2287 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2288 sdata->vif.type))
55de908a
JB		 2289 goto fail_rcu;
2290
73c4e195 2291 info->band = chandef->chan->band;
109843b0
LB		 2292
2293 /* process and remove the injection radiotap header */
2294 if (!ieee80211_parse_tx_radiotap(local, skb))
2295 goto fail_rcu;
2296
b9771d41 2297 ieee80211_xmit(sdata, NULL, skb, 0);
5d9cf4a5
JB		 2298 rcu_read_unlock();
2299
e2ebc74d 2300 return NETDEV_TX_OK;
9b8a74e3 2301
55de908a
JB		 2302fail_rcu:
2303 rcu_read_unlock();
9b8a74e3
AG		 2304fail:
2305 dev_kfree_skb(skb);
2306 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2307}
2308
97ffe757 2309static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2310{
97ffe757 2311 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2312
97ffe757
JB		 2313 return ethertype == ETH_P_TDLS &&
2314 skb->len > 14 &&
2315 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2316}
2317
2318static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2319 struct sk_buff *skb,
2320 struct sta_info **sta_out)
2321{
2322 struct sta_info *sta;
2323
2324 switch (sdata->vif.type) {
2325 case NL80211_IFTYPE_AP_VLAN:
2326 sta = rcu_dereference(sdata->u.vlan.sta);
2327 if (sta) {
2328 *sta_out = sta;
2329 return 0;
2330 } else if (sdata->wdev.use_4addr) {
2331 return -ENOLINK;
2332 }
2333 /* fall through */
2334 case NL80211_IFTYPE_AP:
2335 case NL80211_IFTYPE_OCB:
2336 case NL80211_IFTYPE_ADHOC:
2337 if (is_multicast_ether_addr(skb->data)) {
2338 *sta_out = ERR_PTR(-ENOENT);
2339 return 0;
2340 }
2341 sta = sta_info_get_bss(sdata, skb->data);
2342 break;
2343 case NL80211_IFTYPE_WDS:
2344 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2345 break;
2346#ifdef CONFIG_MAC80211_MESH
2347 case NL80211_IFTYPE_MESH_POINT:
2348 /* determined much later */
2349 *sta_out = NULL;
2350 return 0;
2351#endif
2352 case NL80211_IFTYPE_STATION:
2353 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2354 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2355 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2356 if (test_sta_flag(sta,
2357 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2358 *sta_out = sta;
2359 return 0;
2360 }
2361
2362 /*
2363 * TDLS link during setup - throw out frames to
2364 * peer. Allow TDLS-setup frames to unauthorized
2365 * peers for the special case of a link teardown
2366 * after a TDLS sta is removed due to being
2367 * unreachable.
2368 */
11d62caf 2369 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2370 return -EINVAL;
2371 }
2372
2373 }
2374
2375 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2376 if (!sta)
2377 return -ENOLINK;
2378 break;
2379 default:
2380 return -EINVAL;
2381 }
2382
2383 *sta_out = sta ?: ERR_PTR(-ENOENT);
2384 return 0;
ad38bfc9
MG		 2385}
2386
e2ebc74d 2387/**
4c9451ed
JB		 2388 * ieee80211_build_hdr - build 802.11 header in the given frame
2389 * @sdata: virtual interface to build the header for
2390 * @skb: the skb to build the header in
24d342c5 2391 * @info_flags: skb flags to set
e2ebc74d 2392 *
4c9451ed
JB		 2393 * This function takes the skb with 802.3 header and reformats the header to
2394 * the appropriate IEEE 802.11 header based on which interface the packet is
2395 * being transmitted on.
2396 *
2397 * Note that this function also takes care of the TX status request and
2398 * potential unsharing of the SKB - this needs to be interleaved with the
2399 * header building.
e2ebc74d 2400 *
4c9451ed
JB		 2401 * The function requires the read-side RCU lock held
2402 *
2403 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2404 */
4c9451ed 2405static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2406 struct sk_buff *skb, u32 info_flags,
97ffe757 2407 struct sta_info *sta)
e2ebc74d 2408{
133b8226 2409 struct ieee80211_local *local = sdata->local;
489ee919 2410 struct ieee80211_tx_info *info;
dcf33963 2411 int head_need;
065e9605
HH		 2412 u16 ethertype, hdrlen, meshhdrlen = 0;
2413 __le16 fc;
e2ebc74d 2414 struct ieee80211_hdr hdr;
ff67bb86 2415 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2416 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2417 const u8 *encaps_data;
2418 int encaps_len, skip_header_bytes;
97ffe757
JB		 2419 bool wme_sta = false, authorized = false;
2420 bool tdls_peer;
a729cff8 2421 bool multicast;
a729cff8 2422 u16 info_id = 0;
55de908a
JB		 2423 struct ieee80211_chanctx_conf *chanctx_conf;
2424 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2425 enum nl80211_band band;
4c9451ed 2426 int ret;
e2ebc74d 2427
97ffe757
JB		 2428 if (IS_ERR(sta))
2429 sta = NULL;
2430
e2ebc74d
JB		 2431 /* convert Ethernet header to proper 802.11 header (based on
2432 * operation mode) */
2433 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2434 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2435
51fb61e7 2436 switch (sdata->vif.type) {
05c914fe 2437 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2438 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2439 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2440 /* RA TA DA SA */
2441 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2442 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2443 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2444 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2445 hdrlen = 30;
c2c98fde 2446 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2447 wme_sta = sta->sta.wme;
f14543ee 2448 }
55de908a
JB		 2449 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2450 u.ap);
2451 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2452 if (!chanctx_conf) {
2453 ret = -ENOTCONN;
2454 goto free;
2455 }
4bf88530 2456 band = chanctx_conf->def.chan->band;
97ffe757 2457 if (sdata->wdev.use_4addr)
f14543ee
FF		 2458 break;
2459 /* fall through */
2460 case NL80211_IFTYPE_AP:
fe80123d
AB		 2461 if (sdata->vif.type == NL80211_IFTYPE_AP)
2462 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2463 if (!chanctx_conf) {
2464 ret = -ENOTCONN;
2465 goto free;
2466 }
065e9605 2467 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2468 /* DA BSSID SA */
2469 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2470 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2471 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2472 hdrlen = 24;
4bf88530 2473 band = chanctx_conf->def.chan->band;
cf966838 2474 break;
05c914fe 2475 case NL80211_IFTYPE_WDS:
065e9605 2476 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2477 /* RA TA DA SA */
2478 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2479 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2480 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2481 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2482 hdrlen = 30;
55de908a
JB		 2483 /*
2484 * This is the exception! WDS style interfaces are prohibited
2485 * when channel contexts are in used so this must be valid
2486 */
675a0b04 2487 band = local->hw.conf.chandef.chan->band;
cf966838 2488 break;
33b64eb2 2489#ifdef CONFIG_MAC80211_MESH
05c914fe 2490 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2491 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2492 struct sta_info *next_hop;
2493 bool mpp_lookup = true;
2494
bf7cd94d 2495 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2496 if (mpath) {
2497 mpp_lookup = false;
2498 next_hop = rcu_dereference(mpath->next_hop);
2499 if (!next_hop ||
2500 !(mpath->flags & (MESH_PATH_ACTIVE |
2501 MESH_PATH_RESOLVING)))
2502 mpp_lookup = true;
2503 }
2504
ab1c7906 2505 if (mpp_lookup) {
bf7cd94d 2506 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2507 if (mppath)
2508 mppath->exp_time = jiffies;
2509 }
163df6cf
CYY		 2510
2511 if (mppath && mpath)
2bdaf386 2512 mesh_path_del(sdata, mpath->dst);
b8bacc18 2513 }
79617dee 2514
f76b57b4 2515 /*
9d52501b
JF		 2516 * Use address extension if it is a packet from
2517 * another interface or if we know the destination
2518 * is being proxied by a portal (i.e. portal address
2519 * differs from proxied address)
f76b57b4 2520 */
b203ca39
JP		 2521 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2522 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2523 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2524 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2525 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2526 NULL, NULL);
79617dee 2527 } else {
27f01124
TP		 2528 /* DS -> MBSS (802.11-2012 13.11.3.3).
2529 * For unicast with unknown forwarding information,
2530 * destination might be in the MBSS or if that fails
2531 * forwarded to another mesh gate. In either case
2532 * resolution will be handled in ieee80211_xmit(), so
2533 * leave the original DA. This also works for mcast */
2534 const u8 *mesh_da = skb->data;
2535
2536 if (mppath)
2537 mesh_da = mppath->mpp;
2538 else if (mpath)
2539 mesh_da = mpath->dst;
79617dee 2540
3c5772a5 2541 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2542 mesh_da, sdata->vif.addr);
27f01124
TP		 2543 if (is_multicast_ether_addr(mesh_da))
2544 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2545 meshhdrlen = ieee80211_new_mesh_header(
2546 sdata, &mesh_hdr,
2547 skb->data + ETH_ALEN, NULL);
3c5772a5 2548 else
27f01124 2549 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2550 meshhdrlen = ieee80211_new_mesh_header(
2551 sdata, &mesh_hdr, skb->data,
2552 skb->data + ETH_ALEN);
79617dee 2553
79617dee 2554 }
55de908a 2555 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2556 if (!chanctx_conf) {
2557 ret = -ENOTCONN;
2558 goto free;
2559 }
4bf88530 2560 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 2561 break;
2562#endif
05c914fe 2563 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2564 /* we already did checks when looking up the RA STA */
2565 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2566
97ffe757 2567 if (tdls_peer) {
941c93cd
AN		 2568 /* DA SA BSSID */
2569 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2570 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2571 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2572 hdrlen = 24;
2573 } else if (sdata->u.mgd.use_4addr &&
2574 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2575 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2576 IEEE80211_FCTL_TODS);
f14543ee 2577 /* RA TA DA SA */
941c93cd 2578 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2579 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2580 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2581 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2582 hdrlen = 30;
2583 } else {
2584 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2585 /* BSSID SA DA */
941c93cd 2586 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2587 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2588 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2589 hdrlen = 24;
2590 }
55de908a 2591 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2592 if (!chanctx_conf) {
2593 ret = -ENOTCONN;
2594 goto free;
2595 }
4bf88530 2596 band = chanctx_conf->def.chan->band;
cf966838 2597 break;
239281f8
RL		 2598 case NL80211_IFTYPE_OCB:
2599 /* DA SA BSSID */
2600 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2601 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2602 eth_broadcast_addr(hdr.addr3);
2603 hdrlen = 24;
2604 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2605 if (!chanctx_conf) {
2606 ret = -ENOTCONN;
2607 goto free;
2608 }
239281f8
RL		 2609 band = chanctx_conf->def.chan->band;
2610 break;
05c914fe 2611 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2612 /* DA SA BSSID */
2613 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2614 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2615 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2616 hdrlen = 24;
55de908a 2617 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2618 if (!chanctx_conf) {
2619 ret = -ENOTCONN;
2620 goto free;
2621 }
4bf88530 2622 band = chanctx_conf->def.chan->band;
cf966838
JB		 2623 break;
2624 default:
4c9451ed
JB		 2625 ret = -EINVAL;
2626 goto free;
e2ebc74d
JB		 2627 }
2628
a729cff8 2629 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2630
97ffe757
JB		 2631 /* sta is always NULL for mesh */
2632 if (sta) {
2633 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2634 wme_sta = sta->sta.wme;
2635 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2636 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2637 wme_sta = true;
97ffe757 2638 }
4777be41 2639
527871d7
JB		 2640 /* receiver does QoS (which also means we do) use it */
2641 if (wme_sta) {
065e9605 2642 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2643 hdrlen += 2;
2644 }
2645
2646 /*
238814fd
JB		 2647 * Drop unicast frames to unauthorised stations unless they are
2648 * EAPOL frames from the local station.
ce3edf6d 2649 */
55182e4a 2650 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2651 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2652 !multicast && !authorized &&
55182e4a 2653 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2654 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2655#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2656 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2657 sdata->name, hdr.addr1);
ce3edf6d
JB		 2658#endif
2659
2660 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2661
4c9451ed
JB		 2662 ret = -EPERM;
2663 goto free;
ce3edf6d
JB		 2664 }
2665
a729cff8
JB		 2666 if (unlikely(!multicast && skb->sk &&
2667 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
bf7fa551 2668 struct sk_buff *ack_skb = skb_clone_sk(skb);
a729cff8 2669
bf7fa551 2670 if (ack_skb) {
a729cff8 2671 unsigned long flags;
9475af6e 2672 int id;
a729cff8
JB		 2673
2674 spin_lock_irqsave(&local->ack_status_lock, flags);
bf7fa551 2675 id = idr_alloc(&local->ack_status_frames, ack_skb,
9475af6e 2676 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2677 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2678
9475af6e 2679 if (id >= 0) {
a729cff8
JB		 2680 info_id = id;
2681 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a729cff8 2682 } else {
bf7fa551 2683 kfree_skb(ack_skb);
a729cff8 2684 }
a729cff8
JB		 2685 }
2686 }
2687
7e244707
HS		 2688 /*
2689 * If the skb is shared we need to obtain our own copy.
2690 */
2691 if (skb_shared(skb)) {
a729cff8
JB		 2692 struct sk_buff *tmp_skb = skb;
2693
2694 /* can't happen -- skb is a clone if info_id != 0 */
2695 WARN_ON(info_id);
2696
f8a0a781 2697 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2698 kfree_skb(tmp_skb);
2699
4c9451ed
JB		 2700 if (!skb) {
2701 ret = -ENOMEM;
2702 goto free;
2703 }
7e244707
HS		 2704 }
2705
065e9605 2706 hdr.frame_control = fc;
e2ebc74d
JB		 2707 hdr.duration_id = 0;
2708 hdr.seq_ctrl = 0;
2709
2710 skip_header_bytes = ETH_HLEN;
2711 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2712 encaps_data = bridge_tunnel_header;
2713 encaps_len = sizeof(bridge_tunnel_header);
2714 skip_header_bytes -= 2;
e5c5d22e 2715 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2716 encaps_data = rfc1042_header;
2717 encaps_len = sizeof(rfc1042_header);
2718 skip_header_bytes -= 2;
2719 } else {
2720 encaps_data = NULL;
2721 encaps_len = 0;
2722 }
2723
2724 skb_pull(skb, skip_header_bytes);
23c0752a 2725 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2726
23c0752a
JB		 2727 /*
2728 * So we need to modify the skb header and hence need a copy of
2729 * that. The head_need variable above doesn't, so far, include
2730 * the needed header space that we don't need right away. If we
2731 * can, then we don't reallocate right now but only after the
2732 * frame arrives at the master device (if it does...)
2733 *
2734 * If we cannot, however, then we will reallocate to include all
2735 * the ever needed space. Also, if we need to reallocate it anyway,
2736 * make it big enough for everything we may ever need.
2737 */
e2ebc74d 2738
3a5be7d4 2739 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2740 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2741 head_need += local->tx_headroom;
2742 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2743 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2744 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2745 skb = NULL;
4c9451ed 2746 return ERR_PTR(-ENOMEM);
c3e7724b 2747 }
e2ebc74d
JB		 2748 }
2749
eae4430e 2750 if (encaps_data)
e2ebc74d 2751 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2752
e4ab7eb0 2753#ifdef CONFIG_MAC80211_MESH
eae4430e 2754 if (meshhdrlen > 0)
33b64eb2 2755 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2756#endif
33b64eb2 2757
065e9605 2758 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2759 __le16 *qos_control;
2760
d58ff351 2761 qos_control = skb_push(skb, 2);
c29b9b9b
JB		 2762 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2763 /*
2764 * Maybe we could actually set some fields here, for now just
2765 * initialise to zero to indicate no special operation.
2766 */
2767 *qos_control = 0;
2768 } else
2769 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2770
d57a544d 2771 skb_reset_mac_header(skb);
e2ebc74d 2772
489ee919 2773 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2774 memset(info, 0, sizeof(*info));
2775
a729cff8
JB		 2776 info->flags = info_flags;
2777 info->ack_frame_id = info_id;
73c4e195 2778 info->band = band;
a729cff8 2779
4c9451ed
JB		 2780 return skb;
2781 free:
2782 kfree_skb(skb);
2783 return ERR_PTR(ret);
2784}
2785
17c18bf8
JB		 2786/*
2787 * fast-xmit overview
2788 *
2789 * The core idea of this fast-xmit is to remove per-packet checks by checking
2790 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2791 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2792 * much less work can be done per packet. For example, fragmentation must be
2793 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2794 * in the code here.
2795 *
2796 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2797 * header and other data to aid packet processing in ieee80211_xmit_fast().
2798 *
2799 * The most difficult part of this is that when any of these assumptions
2800 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2801 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2802 * since the per-packet code no longer checks the conditions. This is reflected
2803 * by the calls to these functions throughout the rest of the code, and must be
2804 * maintained if any of the TX path checks change.
2805 */
2806
2807void ieee80211_check_fast_xmit(struct sta_info *sta)
2808{
2809 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2810 struct ieee80211_local *local = sta->local;
2811 struct ieee80211_sub_if_data *sdata = sta->sdata;
2812 struct ieee80211_hdr *hdr = (void *)build.hdr;
2813 struct ieee80211_chanctx_conf *chanctx_conf;
2814 __le16 fc;
2815
30686bf7 2816 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2817 return;
2818
2819 /* Locking here protects both the pointer itself, and against concurrent
2820 * invocations winning data access races to, e.g., the key pointer that
2821 * is used.
2822 * Without it, the invocation of this function right after the key
2823 * pointer changes wouldn't be sufficient, as another CPU could access
2824 * the pointer, then stall, and then do the cache update after the CPU
2825 * that invalidated the key.
2826 * With the locking, such scenarios cannot happen as the check for the
2827 * key and the fast-tx assignment are done atomically, so the CPU that
2828 * modifies the key will either wait or other one will see the key
2829 * cleared/changed already.
2830 */
2831 spin_lock_bh(&sta->lock);
30686bf7
JB		 2832 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2833 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2834 sdata->vif.type == NL80211_IFTYPE_STATION)
2835 goto out;
2836
2837 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2838 goto out;
2839
2840 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2841 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2842 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2843 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2844 goto out;
2845
2846 if (sdata->noack_map)
2847 goto out;
2848
2849 /* fast-xmit doesn't handle fragmentation at all */
725b812c 2850 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
f3fe4e93 2851 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
17c18bf8
JB		 2852 goto out;
2853
2854 rcu_read_lock();
2855 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2856 if (!chanctx_conf) {
2857 rcu_read_unlock();
2858 goto out;
2859 }
2860 build.band = chanctx_conf->def.chan->band;
2861 rcu_read_unlock();
2862
2863 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2864
2865 switch (sdata->vif.type) {
3ffd8840
JB		 2866 case NL80211_IFTYPE_ADHOC:
2867 /* DA SA BSSID */
2868 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2869 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2870 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2871 build.hdr_len = 24;
2872 break;
17c18bf8
JB		 2873 case NL80211_IFTYPE_STATION:
2874 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2875 /* DA SA BSSID */
2876 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2877 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2878 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2879 build.hdr_len = 24;
2880 break;
2881 }
2882
2883 if (sdata->u.mgd.use_4addr) {
2884 /* non-regular ethertype cannot use the fastpath */
2885 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2886 IEEE80211_FCTL_TODS);
2887 /* RA TA DA SA */
2888 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2889 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2890 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2891 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2892 build.hdr_len = 30;
2893 break;
2894 }
2895 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2896 /* BSSID SA DA */
2897 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2898 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2899 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2900 build.hdr_len = 24;
2901 break;
2902 case NL80211_IFTYPE_AP_VLAN:
2903 if (sdata->wdev.use_4addr) {
2904 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2905 IEEE80211_FCTL_TODS);
2906 /* RA TA DA SA */
2907 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2908 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2909 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2910 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2911 build.hdr_len = 30;
2912 break;
2913 }
2914 /* fall through */
2915 case NL80211_IFTYPE_AP:
2916 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2917 /* DA BSSID SA */
2918 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2919 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2920 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2921 build.hdr_len = 24;
2922 break;
2923 default:
2924 /* not handled on fast-xmit */
2925 goto out;
2926 }
2927
2928 if (sta->sta.wme) {
2929 build.hdr_len += 2;
2930 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2931 }
2932
2933 /* We store the key here so there's no point in using rcu_dereference()
2934 * but that's fine because the code that changes the pointers will call
2935 * this function after doing so. For a single CPU that would be enough,
2936 * for multiple see the comment above.
2937 */
2938 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2939 if (!build.key)
2940 build.key = rcu_access_pointer(sdata->default_unicast_key);
2941 if (build.key) {
e495c247 2942 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 2943
2944 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2945 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
9de18d81
DS		 2946 mmic = build.key->conf.flags &
2947 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
2948 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
17c18bf8
JB		 2949
2950 /* don't handle software crypto */
2951 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2952 goto out;
2953
2954 switch (build.key->conf.cipher) {
2955 case WLAN_CIPHER_SUITE_CCMP:
2956 case WLAN_CIPHER_SUITE_CCMP_256:
2957 /* add fixed key ID */
2958 if (gen_iv) {
2959 (build.hdr + build.hdr_len)[3] =
2960 0x20 | (build.key->conf.keyidx << 6);
2961 build.pn_offs = build.hdr_len;
2962 }
2963 if (gen_iv || iv_spc)
2964 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2965 break;
2966 case WLAN_CIPHER_SUITE_GCMP:
2967 case WLAN_CIPHER_SUITE_GCMP_256:
2968 /* add fixed key ID */
2969 if (gen_iv) {
2970 (build.hdr + build.hdr_len)[3] =
2971 0x20 | (build.key->conf.keyidx << 6);
2972 build.pn_offs = build.hdr_len;
2973 }
2974 if (gen_iv || iv_spc)
2975 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2976 break;
e495c247
JB		 2977 case WLAN_CIPHER_SUITE_TKIP:
2978 /* cannot handle MMIC or IV generation in xmit-fast */
2979 if (mmic || gen_iv)
2980 goto out;
2981 if (iv_spc)
2982 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2983 break;
2984 case WLAN_CIPHER_SUITE_WEP40:
2985 case WLAN_CIPHER_SUITE_WEP104:
2986 /* cannot handle IV generation in fast-xmit */
2987 if (gen_iv)
2988 goto out;
2989 if (iv_spc)
2990 build.hdr_len += IEEE80211_WEP_IV_LEN;
2991 break;
2992 case WLAN_CIPHER_SUITE_AES_CMAC:
2993 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2994 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2995 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2996 WARN(1,
2997 "management cipher suite 0x%x enabled for data\n",
2998 build.key->conf.cipher);
17c18bf8 2999 goto out;
e495c247
JB		 3000 default:
3001 /* we don't know how to generate IVs for this at all */
3002 if (WARN_ON(gen_iv))
3003 goto out;
3004 /* pure hardware keys are OK, of course */
3005 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
3006 break;
3007 /* cipher scheme might require space allocation */
3008 if (iv_spc &&
3009 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
3010 goto out;
3011 if (iv_spc)
3012 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 3013 }
3014
3015 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
3016 }
3017
3018 hdr->frame_control = fc;
3019
3020 memcpy(build.hdr + build.hdr_len,
3021 rfc1042_header, sizeof(rfc1042_header));
3022 build.hdr_len += sizeof(rfc1042_header);
3023
3024 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3025 /* if the kmemdup fails, continue w/o fast_tx */
3026 if (!fast_tx)
3027 goto out;
3028
3029 out:
3030 /* we might have raced against another call to this function */
3031 old = rcu_dereference_protected(sta->fast_tx,
3032 lockdep_is_held(&sta->lock));
3033 rcu_assign_pointer(sta->fast_tx, fast_tx);
3034 if (old)
3035 kfree_rcu(old, rcu_head);
3036 spin_unlock_bh(&sta->lock);
3037}
3038
3039void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3040{
3041 struct sta_info *sta;
3042
3043 rcu_read_lock();
3044 list_for_each_entry_rcu(sta, &local->sta_list, list)
3045 ieee80211_check_fast_xmit(sta);
3046 rcu_read_unlock();
3047}
3048
3049void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3050{
3051 struct ieee80211_local *local = sdata->local;
3052 struct sta_info *sta;
3053
3054 rcu_read_lock();
3055
3056 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3057 if (sdata != sta->sdata &&
3058 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3059 continue;
3060 ieee80211_check_fast_xmit(sta);
3061 }
3062
3063 rcu_read_unlock();
3064}
3065
3066void ieee80211_clear_fast_xmit(struct sta_info *sta)
3067{
3068 struct ieee80211_fast_tx *fast_tx;
3069
3070 spin_lock_bh(&sta->lock);
3071 fast_tx = rcu_dereference_protected(sta->fast_tx,
3072 lockdep_is_held(&sta->lock));
3073 RCU_INIT_POINTER(sta->fast_tx, NULL);
3074 spin_unlock_bh(&sta->lock);
3075
3076 if (fast_tx)
3077 kfree_rcu(fast_tx, rcu_head);
3078}
3079
6e0456b5
FF		 3080static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3081 struct sk_buff *skb, int headroom,
3082 int *subframe_len)
3083{
3084 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3085 int padding = (4 - amsdu_len) & 3;
3086
3087 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3088 I802_DEBUG_INC(local->tx_expand_skb_head);
3089
3090 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3091 wiphy_debug(local->hw.wiphy,
3092 "failed to reallocate TX buffer\n");
3093 return false;
3094 }
3095 }
3096
3097 if (padding) {
3098 *subframe_len += padding;
b080db58 3099 skb_put_zero(skb, padding);
6e0456b5
FF		 3100 }
3101
3102 return true;
3103}
3104
3105static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3106 struct ieee80211_fast_tx *fast_tx,
3107 struct sk_buff *skb)
3108{
3109 struct ieee80211_local *local = sdata->local;
3110 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3111 struct ieee80211_hdr *hdr;
06f2bb1e 3112 struct ethhdr *amsdu_hdr;
6e0456b5
FF		 3113 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3114 int subframe_len = skb->len - hdr_len;
3115 void *data;
06f2bb1e 3116 u8 *qc, *h_80211_src, *h_80211_dst;
a3e2f4b6 3117 const u8 *bssid;
6e0456b5
FF		 3118
3119 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3120 return false;
3121
3122 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3123 return true;
3124
06f2bb1e 3125 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr),
6e0456b5
FF		 3126 &subframe_len))
3127 return false;
3128
06f2bb1e
MB		 3129 data = skb_push(skb, sizeof(*amsdu_hdr));
3130 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3131 hdr = data;
3132 amsdu_hdr = data + hdr_len;
3133 /* h_80211_src/dst is addr* field within hdr */
3134 h_80211_src = data + fast_tx->sa_offs;
3135 h_80211_dst = data + fast_tx->da_offs;
6e0456b5 3136
06f2bb1e
MB		 3137 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3138 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3139 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
6e0456b5 3140
a3e2f4b6
MB		 3141 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3142 * fields needs to be changed to BSSID for A-MSDU frames depending
3143 * on FromDS/ToDS values.
3144 */
3145 switch (sdata->vif.type) {
3146 case NL80211_IFTYPE_STATION:
3147 bssid = sdata->u.mgd.bssid;
3148 break;
3149 case NL80211_IFTYPE_AP:
3150 case NL80211_IFTYPE_AP_VLAN:
3151 bssid = sdata->vif.addr;
3152 break;
3153 default:
3154 bssid = NULL;
3155 }
3156
3157 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3158 ether_addr_copy(h_80211_src, bssid);
3159
3160 if (bssid && ieee80211_has_tods(hdr->frame_control))
3161 ether_addr_copy(h_80211_dst, bssid);
3162
6e0456b5
FF		 3163 qc = ieee80211_get_qos_ctl(hdr);
3164 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3165
3166 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3167
3168 return true;
3169}
3170
3171static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3172 struct sta_info *sta,
3173 struct ieee80211_fast_tx *fast_tx,
3174 struct sk_buff *skb)
3175{
3176 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3177 struct fq *fq = &local->fq;
3178 struct fq_tin *tin;
3179 struct fq_flow *flow;
6e0456b5
FF		 3180 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3181 struct ieee80211_txq *txq = sta->sta.txq[tid];
3182 struct txq_info *txqi;
3183 struct sk_buff **frag_tail, *head;
3184 int subframe_len = skb->len - ETH_ALEN;
3185 u8 max_subframes = sta->sta.max_amsdu_subframes;
3186 int max_frags = local->hw.max_tx_fragments;
3187 int max_amsdu_len = sta->sta.max_amsdu_len;
3188 __be16 len;
3189 void *data;
3190 bool ret = false;
fa962b92 3191 unsigned int orig_len;
6e0456b5
FF		 3192 int n = 1, nfrags;
3193
3194 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3195 return false;
3196
3197 if (!txq)
3198 return false;
3199
3200 txqi = to_txq_info(txq);
3201 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3202 return false;
3203
3204 if (sta->sta.max_rc_amsdu_len)
3205 max_amsdu_len = min_t(int, max_amsdu_len,
3206 sta->sta.max_rc_amsdu_len);
3207
fa962b92 3208 spin_lock_bh(&fq->lock);
6e0456b5 3209
fa962b92
MK		 3210 /* TODO: Ideally aggregation should be done on dequeue to remain
3211 * responsive to environment changes.
3212 */
3213
3214 tin = &txqi->tin;
3215 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3216 head = skb_peek_tail(&flow->queue);
6e0456b5
FF		 3217 if (!head)
3218 goto out;
3219
fa962b92
MK		 3220 orig_len = head->len;
3221
6e0456b5
FF		 3222 if (skb->len + head->len > max_amsdu_len)
3223 goto out;
3224
3225 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3226 goto out;
3227
3228 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3229 nfrags += 1 + skb_shinfo(head)->nr_frags;
3230 frag_tail = &skb_shinfo(head)->frag_list;
3231 while (*frag_tail) {
3232 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3233 frag_tail = &(*frag_tail)->next;
3234 n++;
3235 }
3236
3237 if (max_subframes && n > max_subframes)
3238 goto out;
3239
3240 if (max_frags && nfrags > max_frags)
3241 goto out;
3242
3243 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3244 &subframe_len))
3245 goto out;
3246
3247 ret = true;
3248 data = skb_push(skb, ETH_ALEN + 2);
3249 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3250
3251 data += 2 * ETH_ALEN;
3252 len = cpu_to_be16(subframe_len);
3253 memcpy(data, &len, 2);
3254 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3255
3256 head->len += skb->len;
3257 head->data_len += skb->len;
3258 *frag_tail = skb;
3259
fa962b92
MK		 3260 flow->backlog += head->len - orig_len;
3261 tin->backlog_bytes += head->len - orig_len;
3262
3263 fq_recalc_backlog(fq, tin, flow);
3264
6e0456b5 3265out:
fa962b92 3266 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3267
3268 return ret;
3269}
3270
bb42f2d1
THJ		 3271/*
3272 * Can be called while the sta lock is held. Anything that can cause packets to
3273 * be generated will cause deadlock!
3274 */
3275static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3276 struct sta_info *sta, u8 pn_offs,
3277 struct ieee80211_key *key,
3278 struct sk_buff *skb)
3279{
3280 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3281 struct ieee80211_hdr *hdr = (void *)skb->data;
3282 u8 tid = IEEE80211_NUM_TIDS;
3283
3284 if (key)
3285 info->control.hw_key = &key->conf;
3286
3287 ieee80211_tx_stats(skb->dev, skb->len);
3288
3289 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3290 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
bb42f2d1
THJ		 3291 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3292 } else {
3293 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3294 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3295 sdata->sequence_number += 0x10;
3296 }
3297
3298 if (skb_shinfo(skb)->gso_size)
3299 sta->tx_stats.msdu[tid] +=
3300 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3301 else
3302 sta->tx_stats.msdu[tid]++;
3303
3304 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3305
3306 /* statistics normally done by ieee80211_tx_h_stats (but that
3307 * has to consider fragmentation, so is more complex)
3308 */
3309 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3310 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3311
3312 if (pn_offs) {
3313 u64 pn;
3314 u8 *crypto_hdr = skb->data + pn_offs;
3315
3316 switch (key->conf.cipher) {
3317 case WLAN_CIPHER_SUITE_CCMP:
3318 case WLAN_CIPHER_SUITE_CCMP_256:
3319 case WLAN_CIPHER_SUITE_GCMP:
3320 case WLAN_CIPHER_SUITE_GCMP_256:
3321 pn = atomic64_inc_return(&key->conf.tx_pn);
3322 crypto_hdr[0] = pn;
3323 crypto_hdr[1] = pn >> 8;
3324 crypto_hdr[4] = pn >> 16;
3325 crypto_hdr[5] = pn >> 24;
3326 crypto_hdr[6] = pn >> 32;
3327 crypto_hdr[7] = pn >> 40;
3328 break;
3329 }
3330 }
3331}
3332
17c18bf8 3333static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
bb42f2d1 3334 struct sta_info *sta,
17c18bf8
JB		 3335 struct ieee80211_fast_tx *fast_tx,
3336 struct sk_buff *skb)
3337{
3338 struct ieee80211_local *local = sdata->local;
3339 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3340 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3341 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3342 struct ethhdr eth;
35f432a0 3343 struct ieee80211_tx_info *info;
17c18bf8
JB		 3344 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3345 struct ieee80211_tx_data tx;
3346 ieee80211_tx_result r;
3347 struct tid_ampdu_tx *tid_tx = NULL;
3348 u8 tid = IEEE80211_NUM_TIDS;
3349
3350 /* control port protocol needs a lot of special handling */
3351 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3352 return false;
3353
3354 /* only RFC 1042 SNAP */
3355 if (ethertype < ETH_P_802_3_MIN)
3356 return false;
3357
3358 /* don't handle TX status request here either */
3359 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3360 return false;
3361
3362 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3363 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3364 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3365 if (tid_tx) {
3366 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3367 return false;
3368 if (tid_tx->timeout)
3369 tid_tx->last_tx = jiffies;
3370 }
17c18bf8
JB		 3371 }
3372
3373 /* after this point (skb is modified) we cannot return false */
3374
3375 if (skb_shared(skb)) {
3376 struct sk_buff *tmp_skb = skb;
3377
3378 skb = skb_clone(skb, GFP_ATOMIC);
3379 kfree_skb(tmp_skb);
3380
3381 if (!skb)
3382 return true;
3383 }
3384
6e0456b5
FF		 3385 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3386 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3387 return true;
3388
17c18bf8
JB		 3389 /* will not be crypto-handled beyond what we do here, so use false
3390 * as the may-encrypt argument for the resize to not account for
3391 * more room than we already have in 'extra_head'
3392 */
3393 if (unlikely(ieee80211_skb_resize(sdata, skb,
3394 max_t(int, extra_head + hw_headroom -
3395 skb_headroom(skb), 0),
3396 false))) {
3397 kfree_skb(skb);
3398 return true;
3399 }
3400
3401 memcpy(&eth, skb->data, ETH_HLEN - 2);
d58ff351 3402 hdr = skb_push(skb, extra_head);
17c18bf8
JB		 3403 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3404 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3405 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3406
35f432a0 3407 info = IEEE80211_SKB_CB(skb);
17c18bf8
JB		 3408 memset(info, 0, sizeof(*info));
3409 info->band = fast_tx->band;
3410 info->control.vif = &sdata->vif;
3411 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3412 IEEE80211_TX_CTL_DONTFRAG |
3413 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
bb42f2d1 3414 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
17c18bf8 3415
a786f96d
FF		 3416 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3417 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3418 *ieee80211_get_qos_ctl(hdr) = tid;
3419 }
3420
17c18bf8
JB		 3421 __skb_queue_head_init(&tx.skbs);
3422
3423 tx.flags = IEEE80211_TX_UNICAST;
3424 tx.local = local;
3425 tx.sdata = sdata;
3426 tx.sta = sta;
3427 tx.key = fast_tx->key;
3428
30686bf7 3429 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3430 tx.skb = skb;
3431 r = ieee80211_tx_h_rate_ctrl(&tx);
3432 skb = tx.skb;
3433 tx.skb = NULL;
3434
3435 if (r != TX_CONTINUE) {
3436 if (r != TX_QUEUED)
3437 kfree_skb(skb);
3438 return true;
3439 }
3440 }
3441
bb42f2d1
THJ		 3442 if (ieee80211_queue_skb(local, sdata, sta, skb))
3443 return true;
17c18bf8 3444
bb42f2d1
THJ		 3445 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3446 fast_tx->key, skb);
17c18bf8
JB		 3447
3448 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3449 sdata = container_of(sdata->bss,
3450 struct ieee80211_sub_if_data, u.ap);
3451
3452 __skb_queue_tail(&tx.skbs, skb);
3453 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3454 return true;
3455}
3456
e0e2efff
THJ		 3457struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3458 struct ieee80211_txq *txq)
3459{
3460 struct ieee80211_local *local = hw_to_local(hw);
3461 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3462 struct ieee80211_hdr *hdr;
3463 struct sk_buff *skb = NULL;
3464 struct fq *fq = &local->fq;
3465 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3466 struct ieee80211_tx_info *info;
3467 struct ieee80211_tx_data tx;
3468 ieee80211_tx_result r;
53168215 3469 struct ieee80211_vif *vif;
e0e2efff
THJ		 3470
3471 spin_lock_bh(&fq->lock);
3472
3473 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3474 goto out;
3475
bb42f2d1
THJ		 3476 /* Make sure fragments stay together. */
3477 skb = __skb_dequeue(&txqi->frags);
3478 if (skb)
3479 goto out;
3480
3481begin:
e0e2efff
THJ		 3482 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3483 if (!skb)
3484 goto out;
3485
e0e2efff 3486 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3487 info = IEEE80211_SKB_CB(skb);
3488
3489 memset(&tx, 0, sizeof(tx));
3490 __skb_queue_head_init(&tx.skbs);
3491 tx.local = local;
3492 tx.skb = skb;
3493 tx.sdata = vif_to_sdata(info->control.vif);
3494
3495 if (txq->sta)
3496 tx.sta = container_of(txq->sta, struct sta_info, sta);
3497
3498 /*
3499 * The key can be removed while the packet was queued, so need to call
3500 * this here to get the current key.
3501 */
3502 r = ieee80211_tx_h_select_key(&tx);
3503 if (r != TX_CONTINUE) {
3504 ieee80211_free_txskb(&local->hw, skb);
3505 goto begin;
3506 }
3507
c1f4c9ed
FF		 3508 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3509 info->flags |= IEEE80211_TX_CTL_AMPDU;
3510 else
3511 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3512
bb42f2d1 3513 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3514 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3515 sta);
bb42f2d1 3516 u8 pn_offs = 0;
e0e2efff 3517
bb42f2d1
THJ		 3518 if (tx.key &&
3519 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3520 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3521
3522 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3523 tx.key, skb);
3524 } else {
3525 if (invoke_tx_handlers_late(&tx))
3526 goto begin;
3527
3528 skb = __skb_dequeue(&tx.skbs);
3529
3530 if (!skb_queue_empty(&tx.skbs))
3531 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
e0e2efff
THJ		 3532 }
3533
1e1430d5
JB		 3534 if (skb && skb_has_frag_list(skb) &&
3535 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3536 if (skb_linearize(skb)) {
3537 ieee80211_free_txskb(&local->hw, skb);
3538 goto begin;
3539 }
3540 }
3541
53168215
JB		 3542 switch (tx.sdata->vif.type) {
3543 case NL80211_IFTYPE_MONITOR:
3544 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3545 vif = &tx.sdata->vif;
3546 break;
3547 }
3548 tx.sdata = rcu_dereference(local->monitor_sdata);
3549 if (tx.sdata) {
3550 vif = &tx.sdata->vif;
3551 info->hw_queue =
3552 vif->hw_queue[skb_get_queue_mapping(skb)];
3553 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3554 ieee80211_free_txskb(&local->hw, skb);
3555 goto begin;
3556 } else {
3557 vif = NULL;
3558 }
3559 break;
3560 case NL80211_IFTYPE_AP_VLAN:
3561 tx.sdata = container_of(tx.sdata->bss,
3562 struct ieee80211_sub_if_data, u.ap);
3563 /* fall through */
3564 default:
3565 vif = &tx.sdata->vif;
3566 break;
3567 }
3568
3569 IEEE80211_SKB_CB(skb)->control.vif = vif;
e0e2efff
THJ		 3570out:
3571 spin_unlock_bh(&fq->lock);
3572
e0e2efff
THJ		 3573 return skb;
3574}
3575EXPORT_SYMBOL(ieee80211_tx_dequeue);
3576
4c9451ed
JB		 3577void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3578 struct net_device *dev,
3579 u32 info_flags)
3580{
3581 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
97ffe757 3582 struct sta_info *sta;
80616c0d 3583 struct sk_buff *next;
4c9451ed
JB		 3584
3585 if (unlikely(skb->len < ETH_HLEN)) {
3586 kfree_skb(skb);
3587 return;
3588 }
3589
3590 rcu_read_lock();
e2ebc74d 3591
2d981fdd
JB		 3592 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3593 goto out_free;
4c9451ed 3594
17c18bf8
JB		 3595 if (!IS_ERR_OR_NULL(sta)) {
3596 struct ieee80211_fast_tx *fast_tx;
3597
36148c2b
THJ		 3598 /* We need a bit of data queued to build aggregates properly, so
3599 * instruct the TCP stack to allow more than a single ms of data
3600 * to be queued in the stack. The value is a bit-shift of 1
3601 * second, so 8 is ~4ms of queued data. Only affects local TCP
3602 * sockets.
3603 */
3604 sk_pacing_shift_update(skb->sk, 8);
3605
17c18bf8
JB		 3606 fast_tx = rcu_dereference(sta->fast_tx);
3607
3608 if (fast_tx &&
bb42f2d1 3609 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 3610 goto out;
3611 }
3612
80616c0d
JB		 3613 if (skb_is_gso(skb)) {
3614 struct sk_buff *segs;
680a0dab 3615
80616c0d
JB		 3616 segs = skb_gso_segment(skb, 0);
3617 if (IS_ERR(segs)) {
2d981fdd 3618 goto out_free;
80616c0d
JB		 3619 } else if (segs) {
3620 consume_skb(skb);
3621 skb = segs;
3622 }
3623 } else {
3624 /* we cannot process non-linear frames on this path */
3625 if (skb_linearize(skb)) {
3626 kfree_skb(skb);
3627 goto out;
3628 }
3629
3630 /* the frame could be fragmented, software-encrypted, and other
3631 * things so we cannot really handle checksum offload with it -
3632 * fix it up in software before we handle anything else.
3633 */
3634 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3635 skb_set_transport_header(skb,
3636 skb_checksum_start_offset(skb));
80616c0d
JB		 3637 if (skb_checksum_help(skb))
3638 goto out_free;
3639 }
2d981fdd
JB		 3640 }
3641
80616c0d
JB		 3642 next = skb;
3643 while (next) {
3644 skb = next;
3645 next = skb->next;
4c9451ed 3646
80616c0d
JB		 3647 skb->prev = NULL;
3648 skb->next = NULL;
3649
3650 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3651 if (IS_ERR(skb))
3652 goto out;
e2ebc74d 3653
5a490510 3654 ieee80211_tx_stats(dev, skb->len);
80616c0d 3655
b9771d41 3656 ieee80211_xmit(sdata, sta, skb, 0);
80616c0d 3657 }
2d981fdd
JB		 3658 goto out;
3659 out_free:
3660 kfree_skb(skb);
4c9451ed 3661 out:
55de908a 3662 rcu_read_unlock();
e2ebc74d
JB		 3663}
3664
ebceec86
MB		 3665static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3666{
3667 struct ethhdr *eth;
3668 int err;
3669
3670 err = skb_ensure_writable(skb, ETH_HLEN);
3671 if (unlikely(err))
3672 return err;
3673
3674 eth = (void *)skb->data;
3675 ether_addr_copy(eth->h_dest, sta->sta.addr);
3676
3677 return 0;
3678}
3679
3680static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3681 struct net_device *dev)
3682{
3683 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3684 const struct ethhdr *eth = (void *)skb->data;
3685 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3686 __be16 ethertype;
3687
3688 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3689 return false;
3690
3691 switch (sdata->vif.type) {
3692 case NL80211_IFTYPE_AP_VLAN:
3693 if (sdata->u.vlan.sta)
3694 return false;
3695 if (sdata->wdev.use_4addr)
3696 return false;
3697 /* fall through */
3698 case NL80211_IFTYPE_AP:
3699 /* check runtime toggle for this bss */
3700 if (!sdata->bss->multicast_to_unicast)
3701 return false;
3702 break;
3703 default:
3704 return false;
3705 }
3706
3707 /* multicast to unicast conversion only for some payload */
3708 ethertype = eth->h_proto;
3709 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
3710 ethertype = ethvlan->h_vlan_encapsulated_proto;
3711 switch (ethertype) {
3712 case htons(ETH_P_ARP):
3713 case htons(ETH_P_IP):
3714 case htons(ETH_P_IPV6):
3715 break;
3716 default:
3717 return false;
3718 }
3719
3720 return true;
3721}
3722
3723static void
3724ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
3725 struct sk_buff_head *queue)
3726{
3727 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3728 struct ieee80211_local *local = sdata->local;
3729 const struct ethhdr *eth = (struct ethhdr *)skb->data;
3730 struct sta_info *sta, *first = NULL;
3731 struct sk_buff *cloned_skb;
3732
3733 rcu_read_lock();
3734
3735 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3736 if (sdata != sta->sdata)
3737 /* AP-VLAN mismatch */
3738 continue;
3739 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
3740 /* do not send back to source */
3741 continue;
3742 if (!first) {
3743 first = sta;
3744 continue;
3745 }
3746 cloned_skb = skb_clone(skb, GFP_ATOMIC);
3747 if (!cloned_skb)
3748 goto multicast;
3749 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
3750 dev_kfree_skb(cloned_skb);
3751 goto multicast;
3752 }
3753 __skb_queue_tail(queue, cloned_skb);
3754 }
3755
3756 if (likely(first)) {
3757 if (unlikely(ieee80211_change_da(skb, first)))
3758 goto multicast;
3759 __skb_queue_tail(queue, skb);
3760 } else {
3761 /* no STA connected, drop */
3762 kfree_skb(skb);
3763 skb = NULL;
3764 }
3765
3766 goto out;
3767multicast:
3768 __skb_queue_purge(queue);
3769 __skb_queue_tail(queue, skb);
3770out:
3771 rcu_read_unlock();
3772}
3773
4c9451ed
JB		 3774/**
3775 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3776 * @skb: packet to be sent
3777 * @dev: incoming interface
3778 *
3779 * On failure skb will be freed.
3780 */
24d342c5
LK		 3781netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3782 struct net_device *dev)
3783{
ebceec86
MB		 3784 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
3785 struct sk_buff_head queue;
3786
3787 __skb_queue_head_init(&queue);
3788 ieee80211_convert_to_unicast(skb, dev, &queue);
3789 while ((skb = __skb_dequeue(&queue)))
3790 __ieee80211_subif_start_xmit(skb, dev, 0);
3791 } else {
3792 __ieee80211_subif_start_xmit(skb, dev, 0);
3793 }
3794
24d342c5
LK		 3795 return NETDEV_TX_OK;
3796}
e2ebc74d 3797
7528ec57
JB		 3798struct sk_buff *
3799ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3800 struct sk_buff *skb, u32 info_flags)
3801{
3802 struct ieee80211_hdr *hdr;
3803 struct ieee80211_tx_data tx = {
3804 .local = sdata->local,
3805 .sdata = sdata,
3806 };
97ffe757 3807 struct sta_info *sta;
7528ec57
JB		 3808
3809 rcu_read_lock();
3810
97ffe757
JB		 3811 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3812 kfree_skb(skb);
3813 skb = ERR_PTR(-EINVAL);
3814 goto out;
3815 }
3816
3817 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
7528ec57
JB		 3818 if (IS_ERR(skb))
3819 goto out;
3820
3821 hdr = (void *)skb->data;
3822 tx.sta = sta_info_get(sdata, hdr->addr1);
3823 tx.skb = skb;
3824
3825 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3826 rcu_read_unlock();
3827 kfree_skb(skb);
3828 return ERR_PTR(-EINVAL);
3829 }
3830
3831out:
3832 rcu_read_unlock();
3833 return skb;
3834}
3835
e2530083
JB		 3836/*
3837 * ieee80211_clear_tx_pending may not be called in a context where
3838 * it is possible that it packets could come in again.
3839 */
e2ebc74d
JB		 3840void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3841{
1f98ab7f 3842 struct sk_buff *skb;
2de8e0d9 3843 int i;
e2ebc74d 3844
1f98ab7f
FF		 3845 for (i = 0; i < local->hw.queues; i++) {
3846 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3847 ieee80211_free_txskb(&local->hw, skb);
3848 }
e2ebc74d
JB		 3849}
3850
7bb45683
JB		 3851/*
3852 * Returns false if the frame couldn't be transmitted but was queued instead,
3853 * which in this case means re-queued -- take as an indication to stop sending
3854 * more pending frames.
3855 */
cd8ffc80
JB		 3856static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3857 struct sk_buff *skb)
3858{
3859 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3860 struct ieee80211_sub_if_data *sdata;
3861 struct sta_info *sta;
3862 struct ieee80211_hdr *hdr;
7bb45683 3863 bool result;
55de908a 3864 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 3865
5061b0c2 3866 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 3867
3868 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 3869 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3870 if (unlikely(!chanctx_conf)) {
3871 dev_kfree_skb(skb);
3872 return true;
3873 }
73c4e195 3874 info->band = chanctx_conf->def.chan->band;
b9771d41 3875 result = ieee80211_tx(sdata, NULL, skb, true, 0);
cd8ffc80 3876 } else {
252b86c4
JB		 3877 struct sk_buff_head skbs;
3878
3879 __skb_queue_head_init(&skbs);
3880 __skb_queue_tail(&skbs, skb);
3881
cd8ffc80 3882 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 3883 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 3884
74e4dbfd 3885 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 3886 }
3887
cd8ffc80
JB		 3888 return result;
3889}
3890
e2530083 3891/*
3b8d81e0 3892 * Transmit all pending packets. Called from tasklet.
e2530083 3893 */
e2ebc74d
JB		 3894void ieee80211_tx_pending(unsigned long data)
3895{
3896 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 3897 unsigned long flags;
cd8ffc80 3898 int i;
3b8d81e0 3899 bool txok;
e2ebc74d 3900
f0e72851 3901 rcu_read_lock();
e2530083 3902
3b8d81e0 3903 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 3904 for (i = 0; i < local->hw.queues; i++) {
3905 /*
3906 * If queue is stopped by something other than due to pending
3907 * frames, or we have no pending frames, proceed to next queue.
3908 */
3b8d81e0 3909 if (local->queue_stop_reasons[i] ||
2a577d98 3910 skb_queue_empty(&local->pending[i]))
e2ebc74d 3911 continue;
e2530083 3912
2a577d98 3913 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 3914 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 3915 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 3916
a7bc376c 3917 if (WARN_ON(!info->control.vif)) {
c3e7724b 3918 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 3919 continue;
3920 }
3921
3b8d81e0
JB		 3922 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3923 flags);
3924
3925 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 3926 spin_lock_irqsave(&local->queue_stop_reason_lock,
3927 flags);
3928 if (!txok)
2a577d98 3929 break;
e2ebc74d 3930 }
7236fe29
JB		 3931
3932 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 3933 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 3934 }
3b8d81e0 3935 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 3936
f0e72851 3937 rcu_read_unlock();
e2ebc74d
JB		 3938}
3939
3940/* functions for drivers to get certain frames */
3941
eac70c13 3942static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3943 struct ps_data *ps, struct sk_buff *skb,
3944 bool is_template)
e2ebc74d
JB		 3945{
3946 u8 *pos, *tim;
3947 int aid0 = 0;
3948 int i, have_bits = 0, n1, n2;
3949
3950 /* Generate bitmap for TIM only if there are any STAs in power save
3951 * mode. */
d012a605 3952 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 3953 /* in the hope that this is faster than
3954 * checking byte-for-byte */
f359d3fe 3955 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 3956 IEEE80211_MAX_AID+1);
6ec8c332
AO		 3957 if (!is_template) {
3958 if (ps->dtim_count == 0)
3959 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3960 else
3961 ps->dtim_count--;
3962 }
e2ebc74d 3963
4df864c1 3964 tim = pos = skb_put(skb, 6);
e2ebc74d
JB		 3965 *pos++ = WLAN_EID_TIM;
3966 *pos++ = 4;
d012a605 3967 *pos++ = ps->dtim_count;
8860020e 3968 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 3969
d012a605 3970 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 3971 aid0 = 1;
3972
d012a605 3973 ps->dtim_bc_mc = aid0 == 1;
512119b3 3974
e2ebc74d
JB		 3975 if (have_bits) {
3976 /* Find largest even number N1 so that bits numbered 1 through
3977 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3978 * (N2 + 1) x 8 through 2007 are 0. */
3979 n1 = 0;
3980 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 3981 if (ps->tim[i]) {
e2ebc74d
JB		 3982 n1 = i & 0xfe;
3983 break;
3984 }
3985 }
3986 n2 = n1;
3987 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 3988 if (ps->tim[i]) {
e2ebc74d
JB		 3989 n2 = i;
3990 break;
3991 }
3992 }
3993
3994 /* Bitmap control */
3995 *pos++ = n1 | aid0;
3996 /* Part Virt Bitmap */
5220da39 3997 skb_put(skb, n2 - n1);
d012a605 3998 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 3999
4000 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 4001 } else {
4002 *pos++ = aid0; /* Bitmap control */
4003 *pos++ = 0; /* Part Virt Bitmap */
4004 }
e2ebc74d
JB		 4005}
4006
eac70c13 4007static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 4008 struct ps_data *ps, struct sk_buff *skb,
4009 bool is_template)
eac70c13
MP		 4010{
4011 struct ieee80211_local *local = sdata->local;
4012
4013 /*
4014 * Not very nice, but we want to allow the driver to call
4015 * ieee80211_beacon_get() as a response to the set_tim()
4016 * callback. That, however, is already invoked under the
4017 * sta_lock to guarantee consistent and race-free update
4018 * of the tim bitmap in mac80211 and the driver.
4019 */
4020 if (local->tim_in_locked_section) {
6ec8c332 4021 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 4022 } else {
1b91731d 4023 spin_lock_bh(&local->tim_lock);
6ec8c332 4024 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 4025 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 4026 }
4027
4028 return 0;
4029}
4030
1af586c9
AO		 4031static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
4032 struct beacon_data *beacon)
73da7d5b
SW		 4033{
4034 struct probe_resp *resp;
cd7760e6
SW		 4035 u8 *beacon_data;
4036 size_t beacon_data_len;
0d06d9ba 4037 int i;
af296bdb 4038 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 4039
4040 switch (sdata->vif.type) {
4041 case NL80211_IFTYPE_AP:
4042 beacon_data = beacon->tail;
4043 beacon_data_len = beacon->tail_len;
4044 break;
4045 case NL80211_IFTYPE_ADHOC:
4046 beacon_data = beacon->head;
4047 beacon_data_len = beacon->head_len;
4048 break;
b8456a14
CYY		 4049 case NL80211_IFTYPE_MESH_POINT:
4050 beacon_data = beacon->head;
4051 beacon_data_len = beacon->head_len;
4052 break;
cd7760e6
SW		 4053 default:
4054 return;
4055 }
73da7d5b 4056
af296bdb 4057 rcu_read_lock();
0d06d9ba 4058 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 4059 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 4060
af296bdb
MK		 4061 if (beacon->csa_counter_offsets[i]) {
4062 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
4063 beacon_data_len)) {
0d06d9ba
AO		 4064 rcu_read_unlock();
4065 return;
4066 }
af296bdb
MK		 4067
4068 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 4069 }
af296bdb
MK		 4070
4071 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4072 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 4073 }
af296bdb 4074 rcu_read_unlock();
1af586c9
AO		 4075}
4076
e996ec2a
WD		 4077static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
4078{
4079 beacon->csa_current_counter--;
4080
4081 /* the counter should never reach 0 */
4082 WARN_ON_ONCE(!beacon->csa_current_counter);
4083
4084 return beacon->csa_current_counter;
4085}
4086
1af586c9
AO		 4087u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
4088{
4089 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 4090 struct beacon_data *beacon = NULL;
4091 u8 count = 0;
0d06d9ba 4092
af296bdb
MK		 4093 rcu_read_lock();
4094
4095 if (sdata->vif.type == NL80211_IFTYPE_AP)
4096 beacon = rcu_dereference(sdata->u.ap.beacon);
4097 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4098 beacon = rcu_dereference(sdata->u.ibss.presp);
4099 else if (ieee80211_vif_is_mesh(&sdata->vif))
4100 beacon = rcu_dereference(sdata->u.mesh.beacon);
4101
4102 if (!beacon)
4103 goto unlock;
4104
e996ec2a 4105 count = __ieee80211_csa_update_counter(beacon);
1af586c9 4106
af296bdb
MK		 4107unlock:
4108 rcu_read_unlock();
4109 return count;
73da7d5b 4110}
1af586c9 4111EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b 4112
03737001
GG		 4113void ieee80211_csa_set_counter(struct ieee80211_vif *vif, u8 counter)
4114{
4115 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4116 struct beacon_data *beacon = NULL;
4117
4118 rcu_read_lock();
4119
4120 if (sdata->vif.type == NL80211_IFTYPE_AP)
4121 beacon = rcu_dereference(sdata->u.ap.beacon);
4122 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4123 beacon = rcu_dereference(sdata->u.ibss.presp);
4124 else if (ieee80211_vif_is_mesh(&sdata->vif))
4125 beacon = rcu_dereference(sdata->u.mesh.beacon);
4126
4127 if (!beacon)
4128 goto unlock;
4129
4130 if (counter < beacon->csa_current_counter)
4131 beacon->csa_current_counter = counter;
4132
4133unlock:
4134 rcu_read_unlock();
4135}
4136EXPORT_SYMBOL(ieee80211_csa_set_counter);
4137
73da7d5b
SW		 4138bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4139{
4140 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4141 struct beacon_data *beacon = NULL;
4142 u8 *beacon_data;
4143 size_t beacon_data_len;
73da7d5b
SW		 4144 int ret = false;
4145
4146 if (!ieee80211_sdata_running(sdata))
4147 return false;
4148
4149 rcu_read_lock();
4150 if (vif->type == NL80211_IFTYPE_AP) {
4151 struct ieee80211_if_ap *ap = &sdata->u.ap;
4152
4153 beacon = rcu_dereference(ap->beacon);
4154 if (WARN_ON(!beacon || !beacon->tail))
4155 goto out;
4156 beacon_data = beacon->tail;
4157 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 4158 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4159 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4160
4161 beacon = rcu_dereference(ifibss->presp);
4162 if (!beacon)
4163 goto out;
4164
b8456a14
CYY		 4165 beacon_data = beacon->head;
4166 beacon_data_len = beacon->head_len;
4167 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4168 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4169
4170 beacon = rcu_dereference(ifmsh->beacon);
4171 if (!beacon)
4172 goto out;
4173
cd7760e6
SW		 4174 beacon_data = beacon->head;
4175 beacon_data_len = beacon->head_len;
73da7d5b
SW		 4176 } else {
4177 WARN_ON(1);
4178 goto out;
4179 }
4180
10d78f27
MK		 4181 if (!beacon->csa_counter_offsets[0])
4182 goto out;
4183
af296bdb 4184 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 4185 goto out;
4186
af296bdb 4187 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 4188 ret = true;
4189 out:
4190 rcu_read_unlock();
4191
4192 return ret;
4193}
4194EXPORT_SYMBOL(ieee80211_csa_is_complete);
4195
6ec8c332
AO		 4196static struct sk_buff *
4197__ieee80211_beacon_get(struct ieee80211_hw *hw,
4198 struct ieee80211_vif *vif,
4199 struct ieee80211_mutable_offsets *offs,
4200 bool is_template)
e2ebc74d
JB		 4201{
4202 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 4203 struct beacon_data *beacon = NULL;
9d139c81 4204 struct sk_buff *skb = NULL;
e039fa4a 4205 struct ieee80211_tx_info *info;
e2ebc74d 4206 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 4207 enum nl80211_band band;
e00cfce0 4208 struct ieee80211_tx_rate_control txrc;
55de908a 4209 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 4210 int csa_off_base = 0;
8318d78a 4211
5dfdaf58 4212 rcu_read_lock();
e2ebc74d 4213
32bfd35d 4214 sdata = vif_to_sdata(vif);
55de908a 4215 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 4216
55de908a 4217 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 4218 goto out;
4219
6ec8c332
AO		 4220 if (offs)
4221 memset(offs, 0, sizeof(*offs));
eddcbb94 4222
05c914fe 4223 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 4224 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 4225
af296bdb 4226 beacon = rcu_dereference(ap->beacon);
3ad97fbc 4227 if (beacon) {
10d78f27 4228 if (beacon->csa_counter_offsets[0]) {
1af586c9 4229 if (!is_template)
e996ec2a 4230 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 4231
4232 ieee80211_set_csa(sdata, beacon);
4233 }
73da7d5b 4234
902acc78
JB		 4235 /*
4236 * headroom, head length,
4237 * tail length and maximum TIM length
4238 */
4239 skb = dev_alloc_skb(local->tx_headroom +
4240 beacon->head_len +
70dabeb7
FF		 4241 beacon->tail_len + 256 +
4242 local->hw.extra_beacon_tailroom);
902acc78
JB		 4243 if (!skb)
4244 goto out;
33b64eb2 4245
902acc78 4246 skb_reserve(skb, local->tx_headroom);
59ae1d12 4247 skb_put_data(skb, beacon->head, beacon->head_len);
33b64eb2 4248
6ec8c332
AO		 4249 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4250 is_template);
33b64eb2 4251
6ec8c332
AO		 4252 if (offs) {
4253 offs->tim_offset = beacon->head_len;
4254 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 4255
4256 /* for AP the csa offsets are from tail */
4257 csa_off_base = skb->len;
6ec8c332 4258 }
eddcbb94 4259
902acc78 4260 if (beacon->tail)
59ae1d12
JB		 4261 skb_put_data(skb, beacon->tail,
4262 beacon->tail_len);
9d139c81
JB		 4263 } else
4264 goto out;
05c914fe 4265 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 4266 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 4267 struct ieee80211_hdr *hdr;
33b64eb2 4268
af296bdb
MK		 4269 beacon = rcu_dereference(ifibss->presp);
4270 if (!beacon)
9d139c81
JB		 4271 goto out;
4272
10d78f27 4273 if (beacon->csa_counter_offsets[0]) {
1af586c9 4274 if (!is_template)
e996ec2a 4275 __ieee80211_csa_update_counter(beacon);
cd7760e6 4276
af296bdb 4277 ieee80211_set_csa(sdata, beacon);
1af586c9 4278 }
cd7760e6 4279
af296bdb 4280 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 4281 local->hw.extra_beacon_tailroom);
9d139c81
JB		 4282 if (!skb)
4283 goto out;
c3ffeab4 4284 skb_reserve(skb, local->tx_headroom);
59ae1d12 4285 skb_put_data(skb, beacon->head, beacon->head_len);
9d139c81
JB		 4286
4287 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 4288 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4289 IEEE80211_STYPE_BEACON);
902acc78 4290 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 4291 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 4292
af296bdb
MK		 4293 beacon = rcu_dereference(ifmsh->beacon);
4294 if (!beacon)
ac1bd846 4295 goto out;
ac1bd846 4296
10d78f27 4297 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 4298 if (!is_template)
4299 /* TODO: For mesh csa_counter is in TU, so
4300 * decrementing it by one isn't correct, but
4301 * for now we leave it consistent with overall
4302 * mac80211's behavior.
4303 */
e996ec2a 4304 __ieee80211_csa_update_counter(beacon);
1af586c9 4305
af296bdb 4306 ieee80211_set_csa(sdata, beacon);
1af586c9 4307 }
b8456a14 4308
dbf498fb 4309 if (ifmsh->sync_ops)
445cd452 4310 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
dbf498fb 4311
3b69a9c5 4312 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 4313 beacon->head_len +
3f52b7e3 4314 256 + /* TIM IE */
af296bdb 4315 beacon->tail_len +
70dabeb7 4316 local->hw.extra_beacon_tailroom);
902acc78
JB		 4317 if (!skb)
4318 goto out;
2b5e1967 4319 skb_reserve(skb, local->tx_headroom);
59ae1d12 4320 skb_put_data(skb, beacon->head, beacon->head_len);
6ec8c332
AO		 4321 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4322
4323 if (offs) {
af296bdb
MK		 4324 offs->tim_offset = beacon->head_len;
4325 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 4326 }
4327
59ae1d12 4328 skb_put_data(skb, beacon->tail, beacon->tail_len);
9d139c81
JB		 4329 } else {
4330 WARN_ON(1);
5dfdaf58 4331 goto out;
e2ebc74d
JB		 4332 }
4333
1af586c9 4334 /* CSA offsets */
af296bdb 4335 if (offs && beacon) {
1af586c9
AO		 4336 int i;
4337
4338 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 4339 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 4340
4341 if (!csa_off)
4342 continue;
4343
4344 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4345 }
4346 }
4347
4bf88530 4348 band = chanctx_conf->def.chan->band;
55de908a 4349
e039fa4a
JB		 4350 info = IEEE80211_SKB_CB(skb);
4351
3b8d81e0 4352 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 4353 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 4354 info->band = band;
e00cfce0
JM		 4355
4356 memset(&txrc, 0, sizeof(txrc));
4357 txrc.hw = hw;
e31583cd 4358 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 4359 txrc.bss_conf = &sdata->vif.bss_conf;
4360 txrc.skb = skb;
4361 txrc.reported_rate.idx = -1;
37eb0b16 4362 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
8f0729b1 4363 txrc.bss = true;
e00cfce0 4364 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 4365
4366 info->control.vif = vif;
f591fa5d 4367
a472e71b
JL		 4368 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4369 IEEE80211_TX_CTL_ASSIGN_SEQ |
4370 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 4371 out:
5dfdaf58 4372 rcu_read_unlock();
e2ebc74d 4373 return skb;
6ec8c332
AO		 4374
4375}
4376
4377struct sk_buff *
4378ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4379 struct ieee80211_vif *vif,
4380 struct ieee80211_mutable_offsets *offs)
4381{
4382 return __ieee80211_beacon_get(hw, vif, offs, true);
4383}
4384EXPORT_SYMBOL(ieee80211_beacon_get_template);
4385
4386struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4387 struct ieee80211_vif *vif,
4388 u16 *tim_offset, u16 *tim_length)
4389{
4390 struct ieee80211_mutable_offsets offs = {};
4391 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 4392 struct sk_buff *copy;
4393 struct ieee80211_supported_band *sband;
4394 int shift;
4395
4396 if (!bcn)
4397 return bcn;
6ec8c332
AO		 4398
4399 if (tim_offset)
4400 *tim_offset = offs.tim_offset;
4401
4402 if (tim_length)
4403 *tim_length = offs.tim_length;
4404
35afa588
HS		 4405 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4406 !hw_to_local(hw)->monitors)
4407 return bcn;
4408
4409 /* send a copy to monitor interfaces */
4410 copy = skb_copy(bcn, GFP_ATOMIC);
4411 if (!copy)
4412 return bcn;
4413
4414 shift = ieee80211_vif_get_shift(vif);
21a8e9dd
MSS		 4415 sband = ieee80211_get_sband(vif_to_sdata(vif));
4416 if (!sband)
4417 return bcn;
4418
35afa588
HS		 4419 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4420
6ec8c332 4421 return bcn;
e2ebc74d 4422}
eddcbb94 4423EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4424
02945821
AN		 4425struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4426 struct ieee80211_vif *vif)
4427{
4428 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4429 struct sk_buff *skb = NULL;
4430 struct probe_resp *presp = NULL;
02945821
AN		 4431 struct ieee80211_hdr *hdr;
4432 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4433
4434 if (sdata->vif.type != NL80211_IFTYPE_AP)
4435 return NULL;
4436
4437 rcu_read_lock();
4438
4439 ap = &sdata->u.ap;
4440 presp = rcu_dereference(ap->probe_resp);
4441 if (!presp)
4442 goto out;
4443
aa7a0080 4444 skb = dev_alloc_skb(presp->len);
02945821
AN		 4445 if (!skb)
4446 goto out;
4447
59ae1d12 4448 skb_put_data(skb, presp->data, presp->len);
aa7a0080 4449
02945821
AN		 4450 hdr = (struct ieee80211_hdr *) skb->data;
4451 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4452
4453out:
4454 rcu_read_unlock();
4455 return skb;
4456}
4457EXPORT_SYMBOL(ieee80211_proberesp_get);
4458
7044cc56
KV		 4459struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4460 struct ieee80211_vif *vif)
4461{
4462 struct ieee80211_sub_if_data *sdata;
4463 struct ieee80211_if_managed *ifmgd;
4464 struct ieee80211_pspoll *pspoll;
4465 struct ieee80211_local *local;
4466 struct sk_buff *skb;
4467
4468 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4469 return NULL;
4470
4471 sdata = vif_to_sdata(vif);
4472 ifmgd = &sdata->u.mgd;
4473 local = sdata->local;
4474
4475 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4476 if (!skb)
7044cc56 4477 return NULL;
d15b8459 4478
7044cc56
KV		 4479 skb_reserve(skb, local->hw.extra_tx_headroom);
4480
b080db58 4481 pspoll = skb_put_zero(skb, sizeof(*pspoll));
7044cc56
KV		 4482 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4483 IEEE80211_STYPE_PSPOLL);
4484 pspoll->aid = cpu_to_le16(ifmgd->aid);
4485
4486 /* aid in PS-Poll has its two MSBs each set to 1 */
4487 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4488
4489 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4490 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4491
4492 return skb;
4493}
4494EXPORT_SYMBOL(ieee80211_pspoll_get);
4495
4496struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
7b6ddeaf
JB		 4497 struct ieee80211_vif *vif,
4498 bool qos_ok)
7044cc56
KV		 4499{
4500 struct ieee80211_hdr_3addr *nullfunc;
4501 struct ieee80211_sub_if_data *sdata;
4502 struct ieee80211_if_managed *ifmgd;
4503 struct ieee80211_local *local;
4504 struct sk_buff *skb;
7b6ddeaf 4505 bool qos = false;
7044cc56
KV		 4506
4507 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4508 return NULL;
4509
4510 sdata = vif_to_sdata(vif);
4511 ifmgd = &sdata->u.mgd;
4512 local = sdata->local;
4513
7b6ddeaf
JB		 4514 if (qos_ok) {
4515 struct sta_info *sta;
4516
4517 rcu_read_lock();
4518 sta = sta_info_get(sdata, ifmgd->bssid);
4519 qos = sta && sta->sta.wme;
4520 rcu_read_unlock();
4521 }
4522
4523 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4524 sizeof(*nullfunc) + 2);
d15b8459 4525 if (!skb)
7044cc56 4526 return NULL;
d15b8459 4527
7044cc56
KV		 4528 skb_reserve(skb, local->hw.extra_tx_headroom);
4529
b080db58 4530 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
7044cc56
KV		 4531 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4532 IEEE80211_STYPE_NULLFUNC |
4533 IEEE80211_FCTL_TODS);
7b6ddeaf
JB		 4534 if (qos) {
4535 __le16 qos = cpu_to_le16(7);
4536
4537 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
4538 IEEE80211_STYPE_NULLFUNC) !=
4539 IEEE80211_STYPE_QOS_NULLFUNC);
4540 nullfunc->frame_control |=
4541 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
4542 skb->priority = 7;
4543 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
4544 skb_put_data(skb, &qos, sizeof(qos));
4545 }
4546
7044cc56
KV		 4547 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4548 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4549 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4550
4551 return skb;
4552}
4553EXPORT_SYMBOL(ieee80211_nullfunc_get);
4554
05e54ea6 4555struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4556 const u8 *src_addr,
05e54ea6 4557 const u8 *ssid, size_t ssid_len,
b9a9ada1 4558 size_t tailroom)
05e54ea6 4559{
a344d677 4560 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4561 struct ieee80211_hdr_3addr *hdr;
4562 struct sk_buff *skb;
4563 size_t ie_ssid_len;
4564 u8 *pos;
4565
05e54ea6
KV		 4566 ie_ssid_len = 2 + ssid_len;
4567
4568 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4569 ie_ssid_len + tailroom);
d15b8459 4570 if (!skb)
05e54ea6 4571 return NULL;
05e54ea6
KV		 4572
4573 skb_reserve(skb, local->hw.extra_tx_headroom);
4574
b080db58 4575 hdr = skb_put_zero(skb, sizeof(*hdr));
05e54ea6
KV		 4576 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4577 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4578 eth_broadcast_addr(hdr->addr1);
a344d677 4579 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4580 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4581
4582 pos = skb_put(skb, ie_ssid_len);
4583 *pos++ = WLAN_EID_SSID;
4584 *pos++ = ssid_len;
88c868c4 4585 if (ssid_len)
05e54ea6
KV		 4586 memcpy(pos, ssid, ssid_len);
4587 pos += ssid_len;
4588
05e54ea6
KV		 4589 return skb;
4590}
4591EXPORT_SYMBOL(ieee80211_probereq_get);
4592
32bfd35d 4593void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4594 const void *frame, size_t frame_len,
e039fa4a 4595 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4596 struct ieee80211_rts *rts)
4597{
4598 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4599
065e9605
HH		 4600 rts->frame_control =
4601 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4602 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4603 frame_txctl);
e2ebc74d
JB		 4604 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4605 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4606}
4607EXPORT_SYMBOL(ieee80211_rts_get);
4608
32bfd35d 4609void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4610 const void *frame, size_t frame_len,
e039fa4a 4611 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4612 struct ieee80211_cts *cts)
4613{
4614 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4615
065e9605
HH		 4616 cts->frame_control =
4617 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4618 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4619 frame_len, frame_txctl);
e2ebc74d
JB		 4620 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4621}
4622EXPORT_SYMBOL(ieee80211_ctstoself_get);
4623
4624struct sk_buff *
32bfd35d 4625ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4626 struct ieee80211_vif *vif)
e2ebc74d
JB		 4627{
4628 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4629 struct sk_buff *skb = NULL;
5cf121c3 4630 struct ieee80211_tx_data tx;
e2ebc74d 4631 struct ieee80211_sub_if_data *sdata;
d012a605 4632 struct ps_data *ps;
e039fa4a 4633 struct ieee80211_tx_info *info;
55de908a 4634 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4635
32bfd35d 4636 sdata = vif_to_sdata(vif);
5dfdaf58 4637
5dfdaf58 4638 rcu_read_lock();
55de908a 4639 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4640
d012a605
MP		 4641 if (!chanctx_conf)
4642 goto out;
4643
4644 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4645 struct beacon_data *beacon =
4646 rcu_dereference(sdata->u.ap.beacon);
4647
4648 if (!beacon || !beacon->head)
4649 goto out;
4650
4651 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4652 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4653 ps = &sdata->u.mesh.ps;
d012a605 4654 } else {
747cf5e9 4655 goto out;
d012a605 4656 }
5dfdaf58 4657
d012a605 4658 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4659 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4660
e2ebc74d 4661 while (1) {
d012a605 4662 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4663 if (!skb)
747cf5e9 4664 goto out;
e2ebc74d
JB		 4665 local->total_ps_buffered--;
4666
d012a605 4667 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4668 struct ieee80211_hdr *hdr =
4669 (struct ieee80211_hdr *) skb->data;
4670 /* more buffered multicast/broadcast frames ==> set
4671 * MoreData flag in IEEE 802.11 header to inform PS
4672 * STAs */
4673 hdr->frame_control |=
4674 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4675 }
4676
112c44b2 4677 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4678 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4679 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4680 break;
6b07d9ca 4681 ieee80211_free_txskb(hw, skb);
e2ebc74d 4682 }
e039fa4a
JB		 4683
4684 info = IEEE80211_SKB_CB(skb);
4685
5cf121c3 4686 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4687 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4688
97b045d6 4689 if (invoke_tx_handlers(&tx))
e2ebc74d 4690 skb = NULL;
97b045d6 4691 out:
d0709a65 4692 rcu_read_unlock();
e2ebc74d
JB		 4693
4694 return skb;
4695}
4696EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 4697
b6da911b
LK		 4698int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4699{
4700 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4701 struct ieee80211_sub_if_data *sdata = sta->sdata;
4702 struct ieee80211_local *local = sdata->local;
4703 int ret;
4704 u32 queues;
4705
4706 lockdep_assert_held(&local->sta_mtx);
4707
4708 /* only some cases are supported right now */
4709 switch (sdata->vif.type) {
4710 case NL80211_IFTYPE_STATION:
4711 case NL80211_IFTYPE_AP:
4712 case NL80211_IFTYPE_AP_VLAN:
4713 break;
4714 default:
4715 WARN_ON(1);
4716 return -EINVAL;
4717 }
4718
4719 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4720 return -EINVAL;
4721
4722 if (sta->reserved_tid == tid) {
4723 ret = 0;
4724 goto out;
4725 }
4726
4727 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4728 sdata_err(sdata, "TID reservation already active\n");
4729 ret = -EALREADY;
4730 goto out;
4731 }
4732
4733 ieee80211_stop_vif_queues(sdata->local, sdata,
4734 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4735
4736 synchronize_net();
4737
4738 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 4739 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 4740 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4741 __ieee80211_stop_tx_ba_session(sta, tid,
4742 AGG_STOP_LOCAL_REQUEST);
4743 }
4744
4745 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 4746 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 4747
4748 sta->reserved_tid = tid;
4749
4750 ieee80211_wake_vif_queues(local, sdata,
4751 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4752
30686bf7 4753 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 4754 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4755
4756 ret = 0;
4757 out:
4758 return ret;
4759}
4760EXPORT_SYMBOL(ieee80211_reserve_tid);
4761
4762void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4763{
4764 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4765 struct ieee80211_sub_if_data *sdata = sta->sdata;
4766
4767 lockdep_assert_held(&sdata->local->sta_mtx);
4768
4769 /* only some cases are supported right now */
4770 switch (sdata->vif.type) {
4771 case NL80211_IFTYPE_STATION:
4772 case NL80211_IFTYPE_AP:
4773 case NL80211_IFTYPE_AP_VLAN:
4774 break;
4775 default:
4776 WARN_ON(1);
4777 return;
4778 }
4779
4780 if (tid != sta->reserved_tid) {
4781 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4782 return;
4783 }
4784
4785 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4786}
4787EXPORT_SYMBOL(ieee80211_unreserve_tid);
4788
55de908a
JB		 4789void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4790 struct sk_buff *skb, int tid,
b9771d41 4791 enum nl80211_band band, u32 txdata_flags)
3b8d81e0 4792{
731977e9 4793 int ac = ieee80211_ac_from_tid(tid);
3a25a8c8 4794
d57a544d 4795 skb_reset_mac_header(skb);
3a25a8c8 4796 skb_set_queue_mapping(skb, ac);
cf6bb79a 4797 skb->priority = tid;
cf0277e7 4798
89afe614
JB		 4799 skb->dev = sdata->dev;
4800
3d34deb6
JB		 4801 /*
4802 * The other path calling ieee80211_xmit is from the tasklet,
4803 * and while we can handle concurrent transmissions locking
4804 * requirements are that we do not come into tx with bhs on.
4805 */
4806 local_bh_disable();
73c4e195 4807 IEEE80211_SKB_CB(skb)->band = band;
b9771d41 4808 ieee80211_xmit(sdata, NULL, skb, txdata_flags);
3d34deb6 4809 local_bh_enable();
3b8d81e0 4810}
91180649
DK		 4811
4812int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev,
4813 const u8 *buf, size_t len,
4814 const u8 *dest, __be16 proto, bool unencrypted)
4815{
4816 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
4817 struct ieee80211_local *local = sdata->local;
4818 struct sk_buff *skb;
4819 struct ethhdr *ehdr;
4820 u32 flags;
4821
4822 /* Only accept CONTROL_PORT_PROTOCOL configured in CONNECT/ASSOCIATE
4823 * or Pre-Authentication
4824 */
4825 if (proto != sdata->control_port_protocol &&
4826 proto != cpu_to_be16(ETH_P_PREAUTH))
4827 return -EINVAL;
4828
4829 if (unencrypted)
4830 flags = IEEE80211_TX_INTFL_DONT_ENCRYPT;
4831 else
4832 flags = 0;
4833
4834 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4835 sizeof(struct ethhdr) + len);
4836 if (!skb)
4837 return -ENOMEM;
4838
4839 skb_reserve(skb, local->hw.extra_tx_headroom + sizeof(struct ethhdr));
4840
4841 skb_put_data(skb, buf, len);
4842
4843 ehdr = skb_push(skb, sizeof(struct ethhdr));
4844 memcpy(ehdr->h_dest, dest, ETH_ALEN);
4845 memcpy(ehdr->h_source, sdata->vif.addr, ETH_ALEN);
4846 ehdr->h_proto = proto;
4847
4848 skb->dev = dev;
4849 skb->protocol = htons(ETH_P_802_3);
4850 skb_reset_network_header(skb);
4851 skb_reset_mac_header(skb);
4852
e7441c92 4853 local_bh_disable();
91180649 4854 __ieee80211_subif_start_xmit(skb, skb->dev, flags);
e7441c92 4855 local_bh_enable();
91180649
DK		 4856
4857 return 0;
4858}
Linux 6.x block layer and io_uring tree(s)