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nl80211: Fix external_auth check for offloaded authentication
[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
e2ebc74d
JB		 7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 *
13 * Transmit and frame generation functions.
14 */
15
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/skbuff.h>
ebceec86 19#include <linux/if_vlan.h>
e2ebc74d
JB		 20#include <linux/etherdevice.h>
21#include <linux/bitmap.h>
d4e46a3d 22#include <linux/rcupdate.h>
bc3b2d7f 23#include <linux/export.h>
881d966b 24#include <net/net_namespace.h>
e2ebc74d
JB		 25#include <net/ieee80211_radiotap.h>
26#include <net/cfg80211.h>
27#include <net/mac80211.h>
5caa328e
MK		 28#include <net/codel.h>
29#include <net/codel_impl.h>
e2ebc74d 30#include <asm/unaligned.h>
fa962b92 31#include <net/fq_impl.h>
e2ebc74d
JB		 32
33#include "ieee80211_i.h"
24487981 34#include "driver-ops.h"
2c8dccc7 35#include "led.h"
33b64eb2 36#include "mesh.h"
e2ebc74d
JB		 37#include "wep.h"
38#include "wpa.h"
39#include "wme.h"
2c8dccc7 40#include "rate.h"
e2ebc74d 41
e2ebc74d
JB		 42/* misc utils */
43
5a490510
JB		 44static inline void ieee80211_tx_stats(struct net_device *dev, u32 len)
45{
46 struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
47
48 u64_stats_update_begin(&tstats->syncp);
49 tstats->tx_packets++;
50 tstats->tx_bytes += len;
51 u64_stats_update_end(&tstats->syncp);
52}
53
252b86c4
JB		 54static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
55 struct sk_buff *skb, int group_addr,
03f93c3d 56 int next_frag_len)
e2ebc74d 57{
2103dec1 58 int rate, mrate, erp, dur, i, shift = 0;
2e92e6f2 59 struct ieee80211_rate *txrate;
e2ebc74d 60 struct ieee80211_local *local = tx->local;
8318d78a 61 struct ieee80211_supported_band *sband;
358c8d9d 62 struct ieee80211_hdr *hdr;
252b86c4 63 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2103dec1
SW		 64 struct ieee80211_chanctx_conf *chanctx_conf;
65 u32 rate_flags = 0;
66
95cd470c
FF		 67 /* assume HW handles this */
68 if (tx->rate.flags & (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS))
69 return 0;
70
2103dec1
SW		 71 rcu_read_lock();
72 chanctx_conf = rcu_dereference(tx->sdata->vif.chanctx_conf);
73 if (chanctx_conf) {
74 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
75 rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
76 }
77 rcu_read_unlock();
e6a9854b 78
e6a9854b 79 /* uh huh? */
0d528d85 80 if (WARN_ON_ONCE(tx->rate.idx < 0))
e6a9854b 81 return 0;
e2ebc74d 82
2d56577b 83 sband = local->hw.wiphy->bands[info->band];
0d528d85 84 txrate = &sband->bitrates[tx->rate.idx];
8318d78a 85
e6a9854b 86 erp = txrate->flags & IEEE80211_RATE_ERP_G;
e2ebc74d
JB		 87
88 /*
89 * data and mgmt (except PS Poll):
90 * - during CFP: 32768
91 * - during contention period:
92 * if addr1 is group address: 0
93 * if more fragments = 0 and addr1 is individual address: time to
94 * transmit one ACK plus SIFS
95 * if more fragments = 1 and addr1 is individual address: time to
96 * transmit next fragment plus 2 x ACK plus 3 x SIFS
97 *
98 * IEEE 802.11, 9.6:
99 * - control response frame (CTS or ACK) shall be transmitted using the
100 * same rate as the immediately previous frame in the frame exchange
101 * sequence, if this rate belongs to the PHY mandatory rates, or else
102 * at the highest possible rate belonging to the PHY rates in the
103 * BSSBasicRateSet
104 */
252b86c4 105 hdr = (struct ieee80211_hdr *)skb->data;
358c8d9d 106 if (ieee80211_is_ctl(hdr->frame_control)) {
e2ebc74d 107 /* TODO: These control frames are not currently sent by
ccd7b362 108 * mac80211, but should they be implemented, this function
e2ebc74d
JB		 109 * needs to be updated to support duration field calculation.
110 *
111 * RTS: time needed to transmit pending data/mgmt frame plus
112 * one CTS frame plus one ACK frame plus 3 x SIFS
113 * CTS: duration of immediately previous RTS minus time
114 * required to transmit CTS and its SIFS
115 * ACK: 0 if immediately previous directed data/mgmt had
116 * more=0, with more=1 duration in ACK frame is duration
117 * from previous frame minus time needed to transmit ACK
118 * and its SIFS
119 * PS Poll: BIT(15) | BIT(14) | aid
120 */
121 return 0;
122 }
123
124 /* data/mgmt */
125 if (0 /* FIX: data/mgmt during CFP */)
03f93c3d 126 return cpu_to_le16(32768);
e2ebc74d
JB		 127
128 if (group_addr) /* Group address as the destination - no ACK */
129 return 0;
130
131 /* Individual destination address:
132 * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes)
133 * CTS and ACK frames shall be transmitted using the highest rate in
134 * basic rate set that is less than or equal to the rate of the
135 * immediately previous frame and that is using the same modulation
136 * (CCK or OFDM). If no basic rate set matches with these requirements,
137 * the highest mandatory rate of the PHY that is less than or equal to
138 * the rate of the previous frame is used.
139 * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
140 */
141 rate = -1;
8318d78a
JB		 142 /* use lowest available if everything fails */
143 mrate = sband->bitrates[0].bitrate;
144 for (i = 0; i < sband->n_bitrates; i++) {
145 struct ieee80211_rate *r = &sband->bitrates[i];
e2ebc74d 146
8318d78a
JB		 147 if (r->bitrate > txrate->bitrate)
148 break;
e2ebc74d 149
2103dec1
SW		 150 if ((rate_flags & r->flags) != rate_flags)
151 continue;
152
bda3933a 153 if (tx->sdata->vif.bss_conf.basic_rates & BIT(i))
2103dec1 154 rate = DIV_ROUND_UP(r->bitrate, 1 << shift);
8318d78a
JB		 155
156 switch (sband->band) {
57fbcce3 157 case NL80211_BAND_2GHZ: {
8318d78a
JB		 158 u32 flag;
159 if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
160 flag = IEEE80211_RATE_MANDATORY_G;
161 else
162 flag = IEEE80211_RATE_MANDATORY_B;
163 if (r->flags & flag)
164 mrate = r->bitrate;
165 break;
166 }
57fbcce3 167 case NL80211_BAND_5GHZ:
8318d78a
JB		 168 if (r->flags & IEEE80211_RATE_MANDATORY_A)
169 mrate = r->bitrate;
170 break;
57fbcce3 171 case NL80211_BAND_60GHZ:
3a0c52a6 172 /* TODO, for now fall through */
57fbcce3 173 case NUM_NL80211_BANDS:
8318d78a
JB		 174 WARN_ON(1);
175 break;
176 }
e2ebc74d
JB		 177 }
178 if (rate == -1) {
179 /* No matching basic rate found; use highest suitable mandatory
180 * PHY rate */
2103dec1 181 rate = DIV_ROUND_UP(mrate, 1 << shift);
e2ebc74d
JB		 182 }
183
6674f210
SW		 184 /* Don't calculate ACKs for QoS Frames with NoAck Policy set */
185 if (ieee80211_is_data_qos(hdr->frame_control) &&
c26a0e10 186 *(ieee80211_get_qos_ctl(hdr)) & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
6674f210
SW		 187 dur = 0;
188 else
189 /* Time needed to transmit ACK
190 * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
191 * to closest integer */
4ee73f33 192 dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
438b61b7
SW		 193 tx->sdata->vif.bss_conf.use_short_preamble,
194 shift);
e2ebc74d
JB		 195
196 if (next_frag_len) {
197 /* Frame is fragmented: duration increases with time needed to
198 * transmit next fragment plus ACK and 2 x SIFS. */
199 dur *= 2; /* ACK + SIFS */
200 /* next fragment */
4ee73f33 201 dur += ieee80211_frame_duration(sband->band, next_frag_len,
8318d78a 202 txrate->bitrate, erp,
438b61b7
SW		 203 tx->sdata->vif.bss_conf.use_short_preamble,
204 shift);
e2ebc74d
JB		 205 }
206
03f93c3d 207 return cpu_to_le16(dur);
e2ebc74d
JB		 208}
209
e2ebc74d 210/* tx handlers */
5c1b98a5
KV		 211static ieee80211_tx_result debug_noinline
212ieee80211_tx_h_dynamic_ps(struct ieee80211_tx_data *tx)
213{
214 struct ieee80211_local *local = tx->local;
0c74211d 215 struct ieee80211_if_managed *ifmgd;
5c1b98a5
KV		 216
217 /* driver doesn't support power save */
30686bf7 218 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS))
5c1b98a5
KV		 219 return TX_CONTINUE;
220
221 /* hardware does dynamic power save */
30686bf7 222 if (ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS))
5c1b98a5
KV		 223 return TX_CONTINUE;
224
225 /* dynamic power save disabled */
226 if (local->hw.conf.dynamic_ps_timeout <= 0)
227 return TX_CONTINUE;
228
229 /* we are scanning, don't enable power save */
230 if (local->scanning)
231 return TX_CONTINUE;
232
233 if (!local->ps_sdata)
234 return TX_CONTINUE;
235
236 /* No point if we're going to suspend */
237 if (local->quiescing)
238 return TX_CONTINUE;
239
0c74211d
KV		 240 /* dynamic ps is supported only in managed mode */
241 if (tx->sdata->vif.type != NL80211_IFTYPE_STATION)
242 return TX_CONTINUE;
243
244 ifmgd = &tx->sdata->u.mgd;
245
246 /*
247 * Don't wakeup from power save if u-apsd is enabled, voip ac has
248 * u-apsd enabled and the frame is in voip class. This effectively
249 * means that even if all access categories have u-apsd enabled, in
250 * practise u-apsd is only used with the voip ac. This is a
251 * workaround for the case when received voip class packets do not
252 * have correct qos tag for some reason, due the network or the
253 * peer application.
254 *
dc41e4d4 255 * Note: ifmgd->uapsd_queues access is racy here. If the value is
0c74211d
KV		 256 * changed via debugfs, user needs to reassociate manually to have
257 * everything in sync.
258 */
4875d30d
JB		 259 if ((ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) &&
260 (ifmgd->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) &&
261 skb_get_queue_mapping(tx->skb) == IEEE80211_AC_VO)
0c74211d
KV		 262 return TX_CONTINUE;
263
5c1b98a5
KV		 264 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
265 ieee80211_stop_queues_by_reason(&local->hw,
445ea4e8 266 IEEE80211_MAX_QUEUE_MAP,
cca07b00
LC		 267 IEEE80211_QUEUE_STOP_REASON_PS,
268 false);
db28569a 269 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
5c1b98a5
KV		 270 ieee80211_queue_work(&local->hw,
271 &local->dynamic_ps_disable_work);
272 }
273
5db1c07c
LC		 274 /* Don't restart the timer if we're not disassociated */
275 if (!ifmgd->associated)
276 return TX_CONTINUE;
277
5c1b98a5
KV		 278 mod_timer(&local->dynamic_ps_timer, jiffies +
279 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
280
281 return TX_CONTINUE;
282}
e2ebc74d 283
d9e8a70f 284static ieee80211_tx_result debug_noinline
5cf121c3 285ieee80211_tx_h_check_assoc(struct ieee80211_tx_data *tx)
e2ebc74d 286{
358c8d9d 287
e039fa4a 288 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
e039fa4a 289 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
c2c98fde 290 bool assoc = false;
e2ebc74d 291
e039fa4a 292 if (unlikely(info->flags & IEEE80211_TX_CTL_INJECTED))
9ae54c84 293 return TX_CONTINUE;
58d4185e 294
b23b025f
BG		 295 if (unlikely(test_bit(SCAN_SW_SCANNING, &tx->local->scanning)) &&
296 test_bit(SDATA_STATE_OFFCHANNEL, &tx->sdata->state) &&
a9a6ffff
KV		 297 !ieee80211_is_probe_req(hdr->frame_control) &&
298 !ieee80211_is_nullfunc(hdr->frame_control))
299 /*
300 * When software scanning only nullfunc frames (to notify
301 * the sleep state to the AP) and probe requests (for the
302 * active scan) are allowed, all other frames should not be
303 * sent and we should not get here, but if we do
304 * nonetheless, drop them to avoid sending them
305 * off-channel. See the link below and
306 * ieee80211_start_scan() for more.
307 *
308 * http://article.gmane.org/gmane.linux.kernel.wireless.general/30089
309 */
9ae54c84 310 return TX_DROP;
e2ebc74d 311
239281f8
RL		 312 if (tx->sdata->vif.type == NL80211_IFTYPE_OCB)
313 return TX_CONTINUE;
314
1be7fe8d
BJ		 315 if (tx->sdata->vif.type == NL80211_IFTYPE_WDS)
316 return TX_CONTINUE;
317
5cf121c3 318 if (tx->flags & IEEE80211_TX_PS_BUFFERED)
9ae54c84 319 return TX_CONTINUE;
e2ebc74d 320
c2c98fde
JB		 321 if (tx->sta)
322 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
e2ebc74d 323
5cf121c3 324 if (likely(tx->flags & IEEE80211_TX_UNICAST)) {
c2c98fde 325 if (unlikely(!assoc &&
358c8d9d 326 ieee80211_is_data(hdr->frame_control))) {
e2ebc74d 327#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0
JB		 328 sdata_info(tx->sdata,
329 "dropped data frame to not associated station %pM\n",
330 hdr->addr1);
331#endif
e2ebc74d 332 I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc);
9ae54c84 333 return TX_DROP;
e2ebc74d 334 }
72f15d53
MB		 335 } else if (unlikely(ieee80211_is_data(hdr->frame_control) &&
336 ieee80211_vif_get_num_mcast_if(tx->sdata) == 0)) {
29623892
JB		 337 /*
338 * No associated STAs - no need to send multicast
339 * frames.
340 */
341 return TX_DROP;
e2ebc74d
JB		 342 }
343
9ae54c84 344 return TX_CONTINUE;
e2ebc74d
JB		 345}
346
e2ebc74d
JB		 347/* This function is called whenever the AP is about to exceed the maximum limit
348 * of buffered frames for power saving STAs. This situation should not really
349 * happen often during normal operation, so dropping the oldest buffered packet
350 * from each queue should be OK to make some room for new frames. */
351static void purge_old_ps_buffers(struct ieee80211_local *local)
352{
353 int total = 0, purged = 0;
354 struct sk_buff *skb;
355 struct ieee80211_sub_if_data *sdata;
356 struct sta_info *sta;
357
79010420 358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
d012a605
MP		 359 struct ps_data *ps;
360
361 if (sdata->vif.type == NL80211_IFTYPE_AP)
362 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 363 else if (ieee80211_vif_is_mesh(&sdata->vif))
364 ps = &sdata->u.mesh.ps;
d012a605 365 else
e2ebc74d 366 continue;
d012a605
MP		 367
368 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d
JB		 369 if (skb) {
370 purged++;
6b07d9ca 371 ieee80211_free_txskb(&local->hw, skb);
e2ebc74d 372 }
d012a605 373 total += skb_queue_len(&ps->bc_buf);
e2ebc74d 374 }
e2ebc74d 375
948d887d
JB		 376 /*
377 * Drop one frame from each station from the lowest-priority
378 * AC that has frames at all.
379 */
d0709a65 380 list_for_each_entry_rcu(sta, &local->sta_list, list) {
948d887d
JB		 381 int ac;
382
383 for (ac = IEEE80211_AC_BK; ac >= IEEE80211_AC_VO; ac--) {
384 skb = skb_dequeue(&sta->ps_tx_buf[ac]);
385 total += skb_queue_len(&sta->ps_tx_buf[ac]);
386 if (skb) {
387 purged++;
c3e7724b 388 ieee80211_free_txskb(&local->hw, skb);
948d887d
JB		 389 break;
390 }
e2ebc74d 391 }
e2ebc74d 392 }
d0709a65 393
e2ebc74d 394 local->total_ps_buffered = total;
bdcbd8e0 395 ps_dbg_hw(&local->hw, "PS buffers full - purged %d frames\n", purged);
e2ebc74d
JB		 396}
397
9ae54c84 398static ieee80211_tx_result
5cf121c3 399ieee80211_tx_h_multicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 400{
e039fa4a 401 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 402 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d012a605 403 struct ps_data *ps;
e039fa4a 404
7d54d0dd
JB		 405 /*
406 * broadcast/multicast frame
407 *
3f52b7e3 408 * If any of the associated/peer stations is in power save mode,
7d54d0dd
JB		 409 * the frame is buffered to be sent after DTIM beacon frame.
410 * This is done either by the hardware or us.
411 */
412
3f52b7e3 413 /* powersaving STAs currently only in AP/VLAN/mesh mode */
d012a605
MP		 414 if (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
415 tx->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
416 if (!tx->sdata->bss)
417 return TX_CONTINUE;
418
419 ps = &tx->sdata->bss->ps;
3f52b7e3
MP		 420 } else if (ieee80211_vif_is_mesh(&tx->sdata->vif)) {
421 ps = &tx->sdata->u.mesh.ps;
d012a605 422 } else {
3e122be0 423 return TX_CONTINUE;
d012a605
MP		 424 }
425
3e122be0
JB		 426
427 /* no buffering for ordered frames */
358c8d9d 428 if (ieee80211_has_order(hdr->frame_control))
9ae54c84 429 return TX_CONTINUE;
7d54d0dd 430
08b99399
JB		 431 if (ieee80211_is_probe_req(hdr->frame_control))
432 return TX_CONTINUE;
433
30686bf7 434 if (ieee80211_hw_check(&tx->local->hw, QUEUE_CONTROL))
f4d57941
JB		 435 info->hw_queue = tx->sdata->vif.cab_queue;
436
7d54d0dd 437 /* no stations in PS mode */
d012a605 438 if (!atomic_read(&ps->num_sta_ps))
9ae54c84 439 return TX_CONTINUE;
7d54d0dd 440
62b517cb 441 info->flags |= IEEE80211_TX_CTL_SEND_AFTER_DTIM;
62b1208e 442
62b517cb 443 /* device releases frame after DTIM beacon */
30686bf7 444 if (!ieee80211_hw_check(&tx->local->hw, HOST_BROADCAST_PS_BUFFERING))
62b1208e 445 return TX_CONTINUE;
62b1208e 446
7d54d0dd 447 /* buffered in mac80211 */
62b1208e
JB		 448 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
449 purge_old_ps_buffers(tx->local);
450
d012a605 451 if (skb_queue_len(&ps->bc_buf) >= AP_MAX_BC_BUFFER) {
bdcbd8e0
JB		 452 ps_dbg(tx->sdata,
453 "BC TX buffer full - dropping the oldest frame\n");
6b07d9ca 454 ieee80211_free_txskb(&tx->local->hw, skb_dequeue(&ps->bc_buf));
62b1208e
JB		 455 } else
456 tx->local->total_ps_buffered++;
e2ebc74d 457
d012a605 458 skb_queue_tail(&ps->bc_buf, tx->skb);
7d54d0dd 459
62b1208e 460 return TX_QUEUED;
e2ebc74d
JB		 461}
462
fb733336
JM		 463static int ieee80211_use_mfp(__le16 fc, struct sta_info *sta,
464 struct sk_buff *skb)
465{
466 if (!ieee80211_is_mgmt(fc))
467 return 0;
468
c2c98fde 469 if (sta == NULL || !test_sta_flag(sta, WLAN_STA_MFP))
fb733336
JM		 470 return 0;
471
d8ca16db 472 if (!ieee80211_is_robust_mgmt_frame(skb))
fb733336
JM		 473 return 0;
474
475 return 1;
476}
477
9ae54c84 478static ieee80211_tx_result
5cf121c3 479ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d
JB		 480{
481 struct sta_info *sta = tx->sta;
e039fa4a 482 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
08b99399 483 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
3393a608 484 struct ieee80211_local *local = tx->local;
e2ebc74d 485
02f2f1a9 486 if (unlikely(!sta))
9ae54c84 487 return TX_CONTINUE;
e2ebc74d 488
c2c98fde 489 if (unlikely((test_sta_flag(sta, WLAN_STA_PS_STA) ||
5ac2e350
JB		 490 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
491 test_sta_flag(sta, WLAN_STA_PS_DELIVER)) &&
02f2f1a9 492 !(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER))) {
948d887d
JB		 493 int ac = skb_get_queue_mapping(tx->skb);
494
08b99399
JB		 495 if (ieee80211_is_mgmt(hdr->frame_control) &&
496 !ieee80211_is_bufferable_mmpdu(hdr->frame_control)) {
497 info->flags |= IEEE80211_TX_CTL_NO_PS_BUFFER;
498 return TX_CONTINUE;
499 }
500
bdcbd8e0
JB		 501 ps_dbg(sta->sdata, "STA %pM aid %d: PS buffer for AC %d\n",
502 sta->sta.addr, sta->sta.aid, ac);
e2ebc74d
JB		 503 if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER)
504 purge_old_ps_buffers(tx->local);
1d147bfa
EG		 505
506 /* sync with ieee80211_sta_ps_deliver_wakeup */
507 spin_lock(&sta->ps_lock);
508 /*
509 * STA woke up the meantime and all the frames on ps_tx_buf have
510 * been queued to pending queue. No reordering can happen, go
511 * ahead and Tx the packet.
512 */
513 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
5ac2e350
JB		 514 !test_sta_flag(sta, WLAN_STA_PS_DRIVER) &&
515 !test_sta_flag(sta, WLAN_STA_PS_DELIVER)) {
1d147bfa
EG		 516 spin_unlock(&sta->ps_lock);
517 return TX_CONTINUE;
518 }
519
948d887d
JB		 520 if (skb_queue_len(&sta->ps_tx_buf[ac]) >= STA_MAX_TX_BUFFER) {
521 struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf[ac]);
bdcbd8e0
JB		 522 ps_dbg(tx->sdata,
523 "STA %pM TX buffer for AC %d full - dropping oldest frame\n",
524 sta->sta.addr, ac);
c3e7724b 525 ieee80211_free_txskb(&local->hw, old);
e2ebc74d
JB		 526 } else
527 tx->local->total_ps_buffered++;
004c872e 528
e039fa4a 529 info->control.jiffies = jiffies;
5061b0c2 530 info->control.vif = &tx->sdata->vif;
8f77f384 531 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
03c8c06f 532 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
948d887d 533 skb_queue_tail(&sta->ps_tx_buf[ac], tx->skb);
1d147bfa 534 spin_unlock(&sta->ps_lock);
3393a608
JO		 535
536 if (!timer_pending(&local->sta_cleanup))
537 mod_timer(&local->sta_cleanup,
538 round_jiffies(jiffies +
539 STA_INFO_CLEANUP_INTERVAL));
540
c868cb35
JB		 541 /*
542 * We queued up some frames, so the TIM bit might
543 * need to be set, recalculate it.
544 */
545 sta_info_recalc_tim(sta);
546
9ae54c84 547 return TX_QUEUED;
bdcbd8e0
JB		 548 } else if (unlikely(test_sta_flag(sta, WLAN_STA_PS_STA))) {
549 ps_dbg(tx->sdata,
550 "STA %pM in PS mode, but polling/in SP -> send frame\n",
551 sta->sta.addr);
e2ebc74d 552 }
e2ebc74d 553
9ae54c84 554 return TX_CONTINUE;
e2ebc74d
JB		 555}
556
d9e8a70f 557static ieee80211_tx_result debug_noinline
5cf121c3 558ieee80211_tx_h_ps_buf(struct ieee80211_tx_data *tx)
e2ebc74d 559{
5cf121c3 560 if (unlikely(tx->flags & IEEE80211_TX_PS_BUFFERED))
9ae54c84 561 return TX_CONTINUE;
e2ebc74d 562
5cf121c3 563 if (tx->flags & IEEE80211_TX_UNICAST)
e2ebc74d
JB		 564 return ieee80211_tx_h_unicast_ps_buf(tx);
565 else
566 return ieee80211_tx_h_multicast_ps_buf(tx);
567}
568
a621fa4d
JB		 569static ieee80211_tx_result debug_noinline
570ieee80211_tx_h_check_control_port_protocol(struct ieee80211_tx_data *tx)
571{
572 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
573
af61a165
JB		 574 if (unlikely(tx->sdata->control_port_protocol == tx->skb->protocol)) {
575 if (tx->sdata->control_port_no_encrypt)
576 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
577 info->control.flags |= IEEE80211_TX_CTRL_PORT_CTRL_PROTO;
9c1c98a3 578 info->flags |= IEEE80211_TX_CTL_USE_MINRATE;
af61a165 579 }
a621fa4d
JB		 580
581 return TX_CONTINUE;
582}
583
d9e8a70f 584static ieee80211_tx_result debug_noinline
5cf121c3 585ieee80211_tx_h_select_key(struct ieee80211_tx_data *tx)
e2ebc74d 586{
46e6de15 587 struct ieee80211_key *key;
e039fa4a 588 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
358c8d9d 589 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
d4e46a3d 590
3b8d81e0 591 if (unlikely(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT))
e2ebc74d 592 tx->key = NULL;
2475b1cc
MS		 593 else if (tx->sta &&
594 (key = rcu_dereference(tx->sta->ptk[tx->sta->ptk_idx])))
d4e46a3d 595 tx->key = key;
46f6b060
MH		 596 else if (ieee80211_is_group_privacy_action(tx->skb) &&
597 (key = rcu_dereference(tx->sdata->default_multicast_key)))
598 tx->key = key;
3cfcf6ac 599 else if (ieee80211_is_mgmt(hdr->frame_control) &&
ecbcd324 600 is_multicast_ether_addr(hdr->addr1) &&
d8ca16db 601 ieee80211_is_robust_mgmt_frame(tx->skb) &&
3cfcf6ac
JM		 602 (key = rcu_dereference(tx->sdata->default_mgmt_key)))
603 tx->key = key;
f7e0104c
JB		 604 else if (is_multicast_ether_addr(hdr->addr1) &&
605 (key = rcu_dereference(tx->sdata->default_multicast_key)))
606 tx->key = key;
607 else if (!is_multicast_ether_addr(hdr->addr1) &&
608 (key = rcu_dereference(tx->sdata->default_unicast_key)))
d4e46a3d 609 tx->key = key;
e8f4fb7c 610 else
4922f71f 611 tx->key = NULL;
e2ebc74d
JB		 612
613 if (tx->key) {
813d7669
JB		 614 bool skip_hw = false;
615
011bfcc4 616 /* TODO: add threshold stuff again */
176e4f84 617
97359d12
JB		 618 switch (tx->key->conf.cipher) {
619 case WLAN_CIPHER_SUITE_WEP40:
620 case WLAN_CIPHER_SUITE_WEP104:
97359d12 621 case WLAN_CIPHER_SUITE_TKIP:
358c8d9d 622 if (!ieee80211_is_data_present(hdr->frame_control))
176e4f84
JB		 623 tx->key = NULL;
624 break;
97359d12 625 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db 626 case WLAN_CIPHER_SUITE_CCMP_256:
00b9cfa3
JM		 627 case WLAN_CIPHER_SUITE_GCMP:
628 case WLAN_CIPHER_SUITE_GCMP_256:
fb733336
JM		 629 if (!ieee80211_is_data_present(hdr->frame_control) &&
630 !ieee80211_use_mfp(hdr->frame_control, tx->sta,
46f6b060
MH		 631 tx->skb) &&
632 !ieee80211_is_group_privacy_action(tx->skb))
fb733336 633 tx->key = NULL;
3b43a187
KV		 634 else
635 skip_hw = (tx->key->conf.flags &
e548c49e 636 IEEE80211_KEY_FLAG_SW_MGMT_TX) &&
3b43a187 637 ieee80211_is_mgmt(hdr->frame_control);
fb733336 638 break;
97359d12 639 case WLAN_CIPHER_SUITE_AES_CMAC:
56c52da2 640 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
8ade538b
JM		 641 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
642 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
3cfcf6ac
JM		 643 if (!ieee80211_is_mgmt(hdr->frame_control))
644 tx->key = NULL;
645 break;
176e4f84 646 }
813d7669 647
e54faf29
JB		 648 if (unlikely(tx->key && tx->key->flags & KEY_FLAG_TAINTED &&
649 !ieee80211_is_deauth(hdr->frame_control)))
95acac61
JB		 650 return TX_DROP;
651
f12553eb 652 if (!skip_hw && tx->key &&
382b1655 653 tx->key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
813d7669 654 info->control.hw_key = &tx->key->conf;
e2ebc74d
JB		 655 }
656
9ae54c84 657 return TX_CONTINUE;
e2ebc74d
JB		 658}
659
d9e8a70f 660static ieee80211_tx_result debug_noinline
5cf121c3 661ieee80211_tx_h_rate_ctrl(struct ieee80211_tx_data *tx)
e2ebc74d 662{
e039fa4a 663 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
e6a9854b
JB		 664 struct ieee80211_hdr *hdr = (void *)tx->skb->data;
665 struct ieee80211_supported_band *sband;
a2c40249 666 u32 len;
e6a9854b 667 struct ieee80211_tx_rate_control txrc;
0d528d85 668 struct ieee80211_sta_rates *ratetbl = NULL;
c2c98fde 669 bool assoc = false;
8318d78a 670
e6a9854b 671 memset(&txrc, 0, sizeof(txrc));
e2ebc74d 672
2d56577b 673 sband = tx->local->hw.wiphy->bands[info->band];
58d4185e 674
a2c40249 675 len = min_t(u32, tx->skb->len + FCS_LEN,
b9a5f8ca 676 tx->local->hw.wiphy->frag_threshold);
e6a9854b
JB		 677
678 /* set up the tx rate control struct we give the RC algo */
005e472b 679 txrc.hw = &tx->local->hw;
e6a9854b
JB		 680 txrc.sband = sband;
681 txrc.bss_conf = &tx->sdata->vif.bss_conf;
682 txrc.skb = tx->skb;
683 txrc.reported_rate.idx = -1;
2d56577b 684 txrc.rate_idx_mask = tx->sdata->rc_rateidx_mask[info->band];
2ffbe6d3
FF		 685
686 if (tx->sdata->rc_has_mcs_mask[info->band])
687 txrc.rate_idx_mcs_mask =
688 tx->sdata->rc_rateidx_mcs_mask[info->band];
689
8f0729b1 690 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 691 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 692 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
693 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 694
695 /* set up RTS protection if desired */
b9a5f8ca 696 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 697 txrc.rts = true;
e2ebc74d 698 }
e2ebc74d 699
0d528d85 700 info->control.use_rts = txrc.rts;
991fec09
FF		 701 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
702
e6a9854b
JB		 703 /*
704 * Use short preamble if the BSS can handle it, but not for
705 * management frames unless we know the receiver can handle
706 * that -- the management frame might be to a station that
707 * just wants a probe response.
708 */
709 if (tx->sdata->vif.bss_conf.use_short_preamble &&
710 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 711 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 712 txrc.short_preamble = true;
713
714 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 715
dfdfc2be
SE		 716 /* don't ask rate control when rate already injected via radiotap */
717 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
718 return TX_CONTINUE;
719
c2c98fde
JB		 720 if (tx->sta)
721 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 722
723 /*
724 * Lets not bother rate control if we're associated and cannot
725 * talk to the sta. This should not happen.
726 */
c2c98fde 727 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 728 !rate_usable_index_exists(sband, &tx->sta->sta),
729 "%s: Dropped data frame as no usable bitrate found while "
730 "scanning and associated. Target station: "
731 "%pM on %d GHz band\n",
47846c9b 732 tx->sdata->name, hdr->addr1,
2d56577b 733 info->band ? 5 : 2))
b770b43e 734 return TX_DROP;
2e92e6f2 735
b770b43e
LR		 736 /*
737 * If we're associated with the sta at this point we know we can at
738 * least send the frame at the lowest bit rate.
739 */
e6a9854b
JB		 740 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
741
0d528d85
FF		 742 if (tx->sta && !info->control.skip_table)
743 ratetbl = rcu_dereference(tx->sta->sta.rates);
744
745 if (unlikely(info->control.rates[0].idx < 0)) {
746 if (ratetbl) {
747 struct ieee80211_tx_rate rate = {
748 .idx = ratetbl->rate[0].idx,
749 .flags = ratetbl->rate[0].flags,
750 .count = ratetbl->rate[0].count
751 };
752
753 if (ratetbl->rate[0].idx < 0)
754 return TX_DROP;
755
756 tx->rate = rate;
757 } else {
758 return TX_DROP;
759 }
760 } else {
761 tx->rate = info->control.rates[0];
762 }
e6a9854b 763
c1ce5a74 764 if (txrc.reported_rate.idx < 0) {
0d528d85 765 txrc.reported_rate = tx->rate;
c1ce5a74 766 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 767 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 768 } else if (tx->sta)
e5a9f8d0 769 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 770
0d528d85
FF		 771 if (ratetbl)
772 return TX_CONTINUE;
773
e6a9854b
JB		 774 if (unlikely(!info->control.rates[0].count))
775 info->control.rates[0].count = 1;
e2ebc74d 776
9955151d
GS		 777 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
778 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
779 info->control.rates[0].count = 1;
780
e6a9854b
JB		 781 return TX_CONTINUE;
782}
783
ba8c3d6f
FF		 784static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
785{
786 u16 *seq = &sta->tid_seq[tid];
787 __le16 ret = cpu_to_le16(*seq);
788
789 /* Increase the sequence number. */
790 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
791
792 return ret;
793}
794
f591fa5d
JB		 795static ieee80211_tx_result debug_noinline
796ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
797{
798 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
799 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 800 u8 *qc;
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)) {
94778280 828 /* driver should assign sequence number */
f591fa5d 829 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 830 /* for pure STA mode without beacons, we can do it */
831 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
832 tx->sdata->sequence_number += 0x10;
79c892b8 833 if (tx->sta)
e5a9f8d0 834 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 835 return TX_CONTINUE;
836 }
837
838 /*
839 * This should be true for injected/management frames only, for
840 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
841 * above since they are not QoS-data frames.
842 */
843 if (!tx->sta)
844 return TX_CONTINUE;
845
846 /* include per-STA, per-TID sequence counter */
847
848 qc = ieee80211_get_qos_ctl(hdr);
849 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
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
NM		 1140 /* reset session timer */
1141 if (reset_agg_timer && tid_tx->timeout)
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;
a622ab72 1161 u8 *qc;
e2ebc74d
JB		 1162
1163 memset(tx, 0, sizeof(*tx));
1164 tx->skb = skb;
e2ebc74d 1165 tx->local = local;
3b8d81e0 1166 tx->sdata = sdata;
252b86c4 1167 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1168
cd8ffc80
JB		 1169 /*
1170 * If this flag is set to true anywhere, and we get here,
1171 * we are doing the needed processing, so remove the flag
1172 * now.
1173 */
1174 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1175
58d4185e
JB		 1176 hdr = (struct ieee80211_hdr *) skb->data;
1177
7c10770f
JB		 1178 if (likely(sta)) {
1179 if (!IS_ERR(sta))
1180 tx->sta = sta;
1181 } else {
1182 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1183 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1184 if (!tx->sta && sdata->wdev.use_4addr)
1185 return TX_DROP;
1186 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1187 IEEE80211_TX_CTL_INJECTED) ||
1188 tx->sdata->control_port_protocol == tx->skb->protocol) {
1189 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1190 }
1191 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1192 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1193 }
58d4185e 1194
cd8ffc80 1195 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1196 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1197 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1198 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1199 struct tid_ampdu_tx *tid_tx;
1200
8b30b1fe
S		 1201 qc = ieee80211_get_qos_ctl(hdr);
1202 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1203
a622ab72
JB		 1204 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1205 if (tid_tx) {
1206 bool queued;
cd8ffc80 1207
a622ab72
JB		 1208 queued = ieee80211_tx_prep_agg(tx, skb, info,
1209 tid_tx, tid);
1210
1211 if (unlikely(queued))
1212 return TX_QUEUED;
1213 }
8b30b1fe
S		 1214 }
1215
badffb72 1216 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1217 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1218 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1219 } else
5cf121c3 1220 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1221
a26eb27a
JB		 1222 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1223 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1224 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1225 info->flags & IEEE80211_TX_CTL_AMPDU)
1226 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1227 }
1228
e2ebc74d 1229 if (!tx->sta)
e039fa4a 1230 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1231 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1232 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1233 ieee80211_check_fast_xmit(tx->sta);
1234 }
58d4185e 1235
e039fa4a 1236 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1237
9ae54c84 1238 return TX_CONTINUE;
e2ebc74d
JB		 1239}
1240
80a83cfc
MK		 1241static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1242 struct ieee80211_vif *vif,
dbef5362 1243 struct sta_info *sta,
80a83cfc 1244 struct sk_buff *skb)
ba8c3d6f
FF		 1245{
1246 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1247 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1248 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1249
c3732a7b
FF		 1250 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1251 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1252 return NULL;
ba8c3d6f
FF		 1253
1254 if (!ieee80211_is_data(hdr->frame_control))
80a83cfc 1255 return NULL;
ba8c3d6f 1256
dbef5362 1257 if (sta) {
ba8c3d6f
FF		 1258 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1259
dbef5362
MK		 1260 if (!sta->uploaded)
1261 return NULL;
1262
1263 txq = sta->sta.txq[tid];
ba8c3d6f
FF		 1264 } else if (vif) {
1265 txq = vif->txq;
1266 }
1267
1268 if (!txq)
80a83cfc 1269 return NULL;
ba8c3d6f 1270
80a83cfc
MK		 1271 return to_txq_info(txq);
1272}
ba8c3d6f 1273
5caa328e
MK		 1274static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1275{
1276 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1277}
1278
5caa328e
MK		 1279static u32 codel_skb_len_func(const struct sk_buff *skb)
1280{
1281 return skb->len;
1282}
1283
1284static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1285{
1286 const struct ieee80211_tx_info *info;
1287
1288 info = (const struct ieee80211_tx_info *)skb->cb;
1289 return info->control.enqueue_time;
1290}
1291
1292static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1293 void *ctx)
1294{
1295 struct ieee80211_local *local;
1296 struct txq_info *txqi;
1297 struct fq *fq;
1298 struct fq_flow *flow;
1299
1300 txqi = ctx;
1301 local = vif_to_sdata(txqi->txq.vif)->local;
1302 fq = &local->fq;
1303
1304 if (cvars == &txqi->def_cvars)
1305 flow = &txqi->def_flow;
1306 else
1307 flow = &fq->flows[cvars - local->cvars];
1308
1309 return fq_flow_dequeue(fq, flow);
1310}
1311
1312static void codel_drop_func(struct sk_buff *skb,
1313 void *ctx)
1314{
1315 struct ieee80211_local *local;
1316 struct ieee80211_hw *hw;
1317 struct txq_info *txqi;
1318
1319 txqi = ctx;
1320 local = vif_to_sdata(txqi->txq.vif)->local;
1321 hw = &local->hw;
1322
1323 ieee80211_free_txskb(hw, skb);
1324}
1325
fa962b92
MK		 1326static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1327 struct fq_tin *tin,
1328 struct fq_flow *flow)
1329{
5caa328e
MK		 1330 struct ieee80211_local *local;
1331 struct txq_info *txqi;
1332 struct codel_vars *cvars;
1333 struct codel_params *cparams;
1334 struct codel_stats *cstats;
1335
1336 local = container_of(fq, struct ieee80211_local, fq);
1337 txqi = container_of(tin, struct txq_info, tin);
8d51dbb8 1338 cstats = &txqi->cstats;
5caa328e 1339
484a54c2
THJ		 1340 if (txqi->txq.sta) {
1341 struct sta_info *sta = container_of(txqi->txq.sta,
1342 struct sta_info, sta);
1343 cparams = &sta->cparams;
1344 } else {
1345 cparams = &local->cparams;
1346 }
1347
5caa328e
MK		 1348 if (flow == &txqi->def_flow)
1349 cvars = &txqi->def_cvars;
1350 else
1351 cvars = &local->cvars[flow - fq->flows];
1352
1353 return codel_dequeue(txqi,
1354 &flow->backlog,
1355 cparams,
1356 cvars,
1357 cstats,
1358 codel_skb_len_func,
1359 codel_skb_time_func,
1360 codel_drop_func,
1361 codel_dequeue_func);
fa962b92
MK		 1362}
1363
1364static void fq_skb_free_func(struct fq *fq,
1365 struct fq_tin *tin,
1366 struct fq_flow *flow,
1367 struct sk_buff *skb)
1368{
1369 struct ieee80211_local *local;
1370
1371 local = container_of(fq, struct ieee80211_local, fq);
1372 ieee80211_free_txskb(&local->hw, skb);
1373}
1374
1375static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1376 struct fq_tin *tin,
1377 int idx,
1378 struct sk_buff *skb)
1379{
1380 struct txq_info *txqi;
1381
1382 txqi = container_of(tin, struct txq_info, tin);
1383 return &txqi->def_flow;
1384}
1385
80a83cfc
MK		 1386static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1387 struct txq_info *txqi,
1388 struct sk_buff *skb)
1389{
fa962b92
MK		 1390 struct fq *fq = &local->fq;
1391 struct fq_tin *tin = &txqi->tin;
f2ac7e30 1392
5caa328e 1393 ieee80211_set_skb_enqueue_time(skb);
fa962b92
MK		 1394 fq_tin_enqueue(fq, tin, skb,
1395 fq_skb_free_func,
1396 fq_flow_get_default_func);
1397}
ba8c3d6f 1398
2a9e2579
JB		 1399static bool fq_vlan_filter_func(struct fq *fq, struct fq_tin *tin,
1400 struct fq_flow *flow, struct sk_buff *skb,
1401 void *data)
1402{
1403 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1404
1405 return info->control.vif == data;
1406}
1407
1408void ieee80211_txq_remove_vlan(struct ieee80211_local *local,
1409 struct ieee80211_sub_if_data *sdata)
1410{
1411 struct fq *fq = &local->fq;
1412 struct txq_info *txqi;
1413 struct fq_tin *tin;
1414 struct ieee80211_sub_if_data *ap;
1415
1416 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN))
1417 return;
1418
1419 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1420
1421 if (!ap->vif.txq)
1422 return;
1423
1424 txqi = to_txq_info(ap->vif.txq);
1425 tin = &txqi->tin;
1426
1427 spin_lock_bh(&fq->lock);
1428 fq_tin_filter(fq, tin, fq_vlan_filter_func, &sdata->vif,
1429 fq_skb_free_func);
1430 spin_unlock_bh(&fq->lock);
1431}
1432
fa962b92
MK		 1433void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1434 struct sta_info *sta,
1435 struct txq_info *txqi, int tid)
1436{
1437 fq_tin_init(&txqi->tin);
1438 fq_flow_init(&txqi->def_flow);
5caa328e 1439 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1440 codel_stats_init(&txqi->cstats);
bb42f2d1 1441 __skb_queue_head_init(&txqi->frags);
fa962b92
MK		 1442
1443 txqi->txq.vif = &sdata->vif;
1444
1445 if (sta) {
1446 txqi->txq.sta = &sta->sta;
1447 sta->sta.txq[tid] = &txqi->txq;
1448 txqi->txq.tid = tid;
731977e9 1449 txqi->txq.ac = ieee80211_ac_from_tid(tid);
fa962b92
MK		 1450 } else {
1451 sdata->vif.txq = &txqi->txq;
1452 txqi->txq.tid = 0;
1453 txqi->txq.ac = IEEE80211_AC_BE;
80a83cfc 1454 }
fa962b92 1455}
ba8c3d6f 1456
fa962b92
MK		 1457void ieee80211_txq_purge(struct ieee80211_local *local,
1458 struct txq_info *txqi)
1459{
1460 struct fq *fq = &local->fq;
1461 struct fq_tin *tin = &txqi->tin;
1462
1463 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1464 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
fa962b92
MK		 1465}
1466
1467int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1468{
1469 struct fq *fq = &local->fq;
1470 int ret;
5caa328e 1471 int i;
3ff23cd5
THJ		 1472 bool supp_vht = false;
1473 enum nl80211_band band;
fa962b92
MK		 1474
1475 if (!local->ops->wake_tx_queue)
1476 return 0;
1477
1478 ret = fq_init(fq, 4096);
1479 if (ret)
1480 return ret;
1481
3ff23cd5
THJ		 1482 /*
1483 * If the hardware doesn't support VHT, it is safe to limit the maximum
1484 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1485 */
1486 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1487 struct ieee80211_supported_band *sband;
1488
1489 sband = local->hw.wiphy->bands[band];
1490 if (!sband)
1491 continue;
1492
1493 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1494 }
1495
1496 if (!supp_vht)
1497 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1498
5caa328e 1499 codel_params_init(&local->cparams);
5caa328e
MK		 1500 local->cparams.interval = MS2TIME(100);
1501 local->cparams.target = MS2TIME(20);
1502 local->cparams.ecn = true;
1503
1504 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1505 GFP_KERNEL);
1506 if (!local->cvars) {
59a7c828 1507 spin_lock_bh(&fq->lock);
5caa328e 1508 fq_reset(fq, fq_skb_free_func);
59a7c828 1509 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1510 return -ENOMEM;
1511 }
1512
1513 for (i = 0; i < fq->flows_cnt; i++)
1514 codel_vars_init(&local->cvars[i]);
1515
fa962b92
MK		 1516 return 0;
1517}
1518
1519void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1520{
1521 struct fq *fq = &local->fq;
1522
1523 if (!local->ops->wake_tx_queue)
1524 return;
1525
5caa328e
MK		 1526 kfree(local->cvars);
1527 local->cvars = NULL;
1528
59a7c828 1529 spin_lock_bh(&fq->lock);
fa962b92 1530 fq_reset(fq, fq_skb_free_func);
59a7c828 1531 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1532}
1533
bb42f2d1
THJ		 1534static bool ieee80211_queue_skb(struct ieee80211_local *local,
1535 struct ieee80211_sub_if_data *sdata,
1536 struct sta_info *sta,
1537 struct sk_buff *skb)
1538{
bb42f2d1
THJ		 1539 struct fq *fq = &local->fq;
1540 struct ieee80211_vif *vif;
1541 struct txq_info *txqi;
bb42f2d1
THJ		 1542
1543 if (!local->ops->wake_tx_queue ||
1544 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1545 return false;
1546
bb42f2d1
THJ		 1547 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1548 sdata = container_of(sdata->bss,
1549 struct ieee80211_sub_if_data, u.ap);
1550
1551 vif = &sdata->vif;
dbef5362 1552 txqi = ieee80211_get_txq(local, vif, sta, skb);
bb42f2d1
THJ		 1553
1554 if (!txqi)
1555 return false;
1556
bb42f2d1
THJ		 1557 spin_lock_bh(&fq->lock);
1558 ieee80211_txq_enqueue(local, txqi, skb);
1559 spin_unlock_bh(&fq->lock);
1560
e7881bd5 1561 drv_wake_tx_queue(local, txqi);
bb42f2d1
THJ		 1562
1563 return true;
1564}
1565
11127e91
JB		 1566static bool ieee80211_tx_frags(struct ieee80211_local *local,
1567 struct ieee80211_vif *vif,
1568 struct ieee80211_sta *sta,
1569 struct sk_buff_head *skbs,
1570 bool txpending)
e2ebc74d 1571{
80a83cfc 1572 struct ieee80211_tx_control control = {};
252b86c4 1573 struct sk_buff *skb, *tmp;
3b8d81e0 1574 unsigned long flags;
e2ebc74d 1575
252b86c4 1576 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1577 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1578 int q = info->hw_queue;
1579
1580#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1581 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1582 __skb_unlink(skb, skbs);
c3e7724b 1583 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1584 continue;
1585 }
1586#endif
3b8d81e0
JB		 1587
1588 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1589 if (local->queue_stop_reasons[q] ||
7bb45683 1590 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1591 if (unlikely(info->flags &
a7679ed5
SF		 1592 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1593 if (local->queue_stop_reasons[q] &
1594 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1595 /*
1596 * Drop off-channel frames if queues
1597 * are stopped for any reason other
1598 * than off-channel operation. Never
1599 * queue them.
1600 */
1601 spin_unlock_irqrestore(
1602 &local->queue_stop_reason_lock,
1603 flags);
1604 ieee80211_purge_tx_queue(&local->hw,
1605 skbs);
1606 return true;
1607 }
1608 } else {
1609
6c17b77b 1610 /*
a7679ed5
SF		 1611 * Since queue is stopped, queue up frames for
1612 * later transmission from the tx-pending
1613 * tasklet when the queue is woken again.
6c17b77b 1614 */
a7679ed5
SF		 1615 if (txpending)
1616 skb_queue_splice_init(skbs,
1617 &local->pending[q]);
1618 else
1619 skb_queue_splice_tail_init(skbs,
1620 &local->pending[q]);
1621
1622 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1623 flags);
1624 return false;
6c17b77b 1625 }
7bb45683 1626 }
3b8d81e0 1627 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1628
11127e91 1629 info->control.vif = vif;
80a83cfc 1630 control.sta = sta;
f0e72851 1631
11127e91 1632 __skb_unlink(skb, skbs);
80a83cfc 1633 drv_tx(local, &control, skb);
11127e91 1634 }
5061b0c2 1635
11127e91
JB		 1636 return true;
1637}
1638
1639/*
1640 * Returns false if the frame couldn't be transmitted but was queued instead.
1641 */
1642static bool __ieee80211_tx(struct ieee80211_local *local,
1643 struct sk_buff_head *skbs, int led_len,
1644 struct sta_info *sta, bool txpending)
1645{
1646 struct ieee80211_tx_info *info;
1647 struct ieee80211_sub_if_data *sdata;
1648 struct ieee80211_vif *vif;
1649 struct ieee80211_sta *pubsta;
1650 struct sk_buff *skb;
1651 bool result = true;
1652 __le16 fc;
5061b0c2 1653
11127e91
JB		 1654 if (WARN_ON(skb_queue_empty(skbs)))
1655 return true;
ec25acc4 1656
11127e91
JB		 1657 skb = skb_peek(skbs);
1658 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1659 info = IEEE80211_SKB_CB(skb);
1660 sdata = vif_to_sdata(info->control.vif);
1661 if (sta && !sta->uploaded)
1662 sta = NULL;
1663
1664 if (sta)
1665 pubsta = &sta->sta;
1666 else
1667 pubsta = NULL;
1668
1669 switch (sdata->vif.type) {
1670 case NL80211_IFTYPE_MONITOR:
d8212184 1671 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1672 vif = &sdata->vif;
1673 break;
1674 }
4b6f1dd6 1675 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1676 if (sdata) {
4b6f1dd6 1677 vif = &sdata->vif;
3a25a8c8
JB		 1678 info->hw_queue =
1679 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1680 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1681 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1682 return true;
1683 } else
4b6f1dd6 1684 vif = NULL;
11127e91
JB		 1685 break;
1686 case NL80211_IFTYPE_AP_VLAN:
1687 sdata = container_of(sdata->bss,
1688 struct ieee80211_sub_if_data, u.ap);
1689 /* fall through */
1690 default:
1691 vif = &sdata->vif;
1692 break;
e2ebc74d 1693 }
2de8e0d9 1694
cb831b53
JB		 1695 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1696 txpending);
11127e91 1697
74e4dbfd 1698 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1699
4db4e0a1 1700 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1701
11127e91 1702 return result;
e2ebc74d
JB		 1703}
1704
97b045d6
JB		 1705/*
1706 * Invoke TX handlers, return 0 on success and non-zero if the
1707 * frame was dropped or queued.
bb42f2d1
THJ		 1708 *
1709 * The handlers are split into an early and late part. The latter is everything
1710 * that can be sensitive to reordering, and will be deferred to after packets
1711 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1712 */
bb42f2d1 1713static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1714{
97b045d6 1715 ieee80211_tx_result res = TX_DROP;
97b045d6 1716
9aa4aee3
JB		 1717#define CALL_TXH(txh) \
1718 do { \
1719 res = txh(tx); \
1720 if (res != TX_CONTINUE) \
1721 goto txh_done; \
1722 } while (0)
1723
5c1b98a5 1724 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1725 CALL_TXH(ieee80211_tx_h_check_assoc);
1726 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1727 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1728 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1729 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1730 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1731
bb42f2d1
THJ		 1732 txh_done:
1733 if (unlikely(res == TX_DROP)) {
1734 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1735 if (tx->skb)
1736 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1737 else
1738 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1739 return -1;
1740 } else if (unlikely(res == TX_QUEUED)) {
1741 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1742 return -1;
1743 }
1744
1745 return 0;
1746}
1747
1748/*
1749 * Late handlers can be called while the sta lock is held. Handlers that can
1750 * cause packets to be generated will cause deadlock!
1751 */
1752static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1753{
1754 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1755 ieee80211_tx_result res = TX_CONTINUE;
1756
aa5b5492
JB		 1757 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1758 __skb_queue_tail(&tx->skbs, tx->skb);
1759 tx->skb = NULL;
c6fcf6bc 1760 goto txh_done;
aa5b5492 1761 }
c6fcf6bc
JB		 1762
1763 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1764 CALL_TXH(ieee80211_tx_h_sequence);
1765 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1766 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1767 CALL_TXH(ieee80211_tx_h_stats);
1768 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1769 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1770 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1771#undef CALL_TXH
97b045d6 1772
d9e8a70f 1773 txh_done:
97b045d6 1774 if (unlikely(res == TX_DROP)) {
5479d0e7 1775 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1776 if (tx->skb)
c3e7724b 1777 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1778 else
1f98ab7f 1779 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1780 return -1;
1781 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1782 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1783 return -1;
1784 }
1785
1786 return 0;
1787}
1788
bb42f2d1
THJ		 1789static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1790{
1791 int r = invoke_tx_handlers_early(tx);
1792
1793 if (r)
1794 return r;
1795 return invoke_tx_handlers_late(tx);
1796}
1797
06be6b14
FF		 1798bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1799 struct ieee80211_vif *vif, struct sk_buff *skb,
1800 int band, struct ieee80211_sta **sta)
1801{
1802 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1803 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1804 struct ieee80211_tx_data tx;
88724a81 1805 struct sk_buff *skb2;
06be6b14 1806
7c10770f 1807 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1808 return false;
1809
1810 info->band = band;
1811 info->control.vif = vif;
1812 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1813
1814 if (invoke_tx_handlers(&tx))
1815 return false;
1816
1817 if (sta) {
1818 if (tx.sta)
1819 *sta = &tx.sta->sta;
1820 else
1821 *sta = NULL;
1822 }
1823
88724a81
JB		 1824 /* this function isn't suitable for fragmented data frames */
1825 skb2 = __skb_dequeue(&tx.skbs);
1826 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1827 ieee80211_free_txskb(hw, skb2);
1828 ieee80211_purge_tx_queue(hw, &tx.skbs);
1829 return false;
1830 }
1831
06be6b14
FF		 1832 return true;
1833}
1834EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1835
7bb45683
JB		 1836/*
1837 * Returns false if the frame couldn't be transmitted but was queued instead.
1838 */
1839static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f
JB		 1840 struct sta_info *sta, struct sk_buff *skb,
1841 bool txpending)
e2ebc74d 1842{
3b8d81e0 1843 struct ieee80211_local *local = sdata->local;
5cf121c3 1844 struct ieee80211_tx_data tx;
97b045d6 1845 ieee80211_tx_result res_prepare;
e039fa4a 1846 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1847 bool result = true;
74e4dbfd 1848 int led_len;
e2ebc74d 1849
e2ebc74d
JB		 1850 if (unlikely(skb->len < 10)) {
1851 dev_kfree_skb(skb);
7bb45683 1852 return true;
e2ebc74d
JB		 1853 }
1854
58d4185e 1855 /* initialises tx */
74e4dbfd 1856 led_len = skb->len;
7c10770f 1857 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1858
cd8ffc80 1859 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1860 ieee80211_free_txskb(&local->hw, skb);
55de908a 1861 return true;
cd8ffc80 1862 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1863 return true;
e2ebc74d
JB		 1864 }
1865
3a25a8c8
JB		 1866 /* set up hw_queue value early */
1867 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1868 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1869 info->hw_queue =
1870 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1871
bb42f2d1
THJ		 1872 if (invoke_tx_handlers_early(&tx))
1873 return false;
1874
1875 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1876 return true;
1877
1878 if (!invoke_tx_handlers_late(&tx))
74e4dbfd
JB		 1879 result = __ieee80211_tx(local, &tx.skbs, led_len,
1880 tx.sta, txpending);
55de908a 1881
7bb45683 1882 return result;
e2ebc74d
JB		 1883}
1884
1885/* device xmit handlers */
1886
3bff1865 1887static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1888 struct sk_buff *skb,
1889 int head_need, bool may_encrypt)
1890{
3bff1865 1891 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1892 int tail_need = 0;
1893
3bff1865 1894 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1895 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1896 tail_need -= skb_tailroom(skb);
1897 tail_need = max_t(int, tail_need, 0);
1898 }
1899
c70f59a2 1900 if (skb_cloned(skb) &&
30686bf7 1901 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
c70f59a2 1902 !skb_clone_writable(skb, ETH_HLEN) ||
17c18bf8 1903 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
23c0752a 1904 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1905 else if (head_need || tail_need)
23c0752a 1906 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1907 else
1908 return 0;
23c0752a
JB		 1909
1910 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1911 wiphy_debug(local->hw.wiphy,
1912 "failed to reallocate TX buffer\n");
23c0752a
JB		 1913 return -ENOMEM;
1914 }
1915
23c0752a
JB		 1916 return 0;
1917}
1918
7c10770f
JB		 1919void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1920 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1921{
3b8d81e0 1922 struct ieee80211_local *local = sdata->local;
e039fa4a 1923 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1924 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1925 int headroom;
23c0752a 1926 bool may_encrypt;
e2ebc74d 1927
3b8d81e0 1928 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1929
3b8d81e0 1930 headroom = local->tx_headroom;
23c0752a 1931 if (may_encrypt)
2475b1cc 1932 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1933 headroom -= skb_headroom(skb);
1934 headroom = max_t(int, 0, headroom);
1935
3bff1865 1936 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1937 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1938 return;
e2ebc74d
JB		 1939 }
1940
740c1aa3 1941 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1942 info->control.vif = &sdata->vif;
e2ebc74d 1943
3f52b7e3
MP		 1944 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1945 if (ieee80211_is_data(hdr->frame_control) &&
1946 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1947 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1948 return; /* skb queued: don't free */
1949 } else {
1950 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1951 }
98aed9fd 1952 }
cca89496 1953
2154c81c 1954 ieee80211_set_qos_hdr(sdata, skb);
7c10770f 1955 ieee80211_tx(sdata, sta, skb, false);
e2ebc74d
JB		 1956}
1957
dfdfc2be
SE		 1958static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1959 struct sk_buff *skb)
73b9f03a
JB		 1960{
1961 struct ieee80211_radiotap_iterator iterator;
1962 struct ieee80211_radiotap_header *rthdr =
1963 (struct ieee80211_radiotap_header *) skb->data;
1964 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 1965 struct ieee80211_supported_band *sband =
1966 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 1967 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1968 NULL);
1969 u16 txflags;
dfdfc2be
SE		 1970 u16 rate = 0;
1971 bool rate_found = false;
1972 u8 rate_retries = 0;
1973 u16 rate_flags = 0;
f66b60f6 1974 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 1975 u16 vht_known;
1976 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 1977 int i;
73b9f03a
JB		 1978
1979 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1980 IEEE80211_TX_CTL_DONTFRAG;
1981
1982 /*
1983 * for every radiotap entry that is present
1984 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1985 * entries present, or -EINVAL on error)
1986 */
1987
1988 while (!ret) {
1989 ret = ieee80211_radiotap_iterator_next(&iterator);
1990
1991 if (ret)
1992 continue;
1993
1994 /* see if this argument is something we can use */
1995 switch (iterator.this_arg_index) {
1996 /*
1997 * You must take care when dereferencing iterator.this_arg
1998 * for multibyte types... the pointer is not aligned. Use
1999 * get_unaligned((type *)iterator.this_arg) to dereference
2000 * iterator.this_arg for type "type" safely on all arches.
2001 */
2002 case IEEE80211_RADIOTAP_FLAGS:
2003 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
2004 /*
2005 * this indicates that the skb we have been
2006 * handed has the 32-bit FCS CRC at the end...
2007 * we should react to that by snipping it off
2008 * because it will be recomputed and added
2009 * on transmission
2010 */
2011 if (skb->len < (iterator._max_length + FCS_LEN))
2012 return false;
2013
2014 skb_trim(skb, skb->len - FCS_LEN);
2015 }
2016 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
2017 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
2018 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
2019 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
2020 break;
2021
2022 case IEEE80211_RADIOTAP_TX_FLAGS:
2023 txflags = get_unaligned_le16(iterator.this_arg);
2024 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
2025 info->flags |= IEEE80211_TX_CTL_NO_ACK;
2026 break;
2027
dfdfc2be
SE		 2028 case IEEE80211_RADIOTAP_RATE:
2029 rate = *iterator.this_arg;
2030 rate_flags = 0;
2031 rate_found = true;
2032 break;
2033
2034 case IEEE80211_RADIOTAP_DATA_RETRIES:
2035 rate_retries = *iterator.this_arg;
2036 break;
2037
2038 case IEEE80211_RADIOTAP_MCS:
2039 mcs_known = iterator.this_arg[0];
2040 mcs_flags = iterator.this_arg[1];
2041 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2042 break;
2043
2044 rate_found = true;
2045 rate = iterator.this_arg[2];
2046 rate_flags = IEEE80211_TX_RC_MCS;
2047
2048 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2049 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2050 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2051
f66b60f6 2052 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2053 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2054 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 2055 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2056 break;
2057
646e76bb
LB		 2058 case IEEE80211_RADIOTAP_VHT:
2059 vht_known = get_unaligned_le16(iterator.this_arg);
2060 rate_found = true;
2061
2062 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2063 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2064 (iterator.this_arg[2] &
2065 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2066 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2067 if (vht_known &
2068 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2069 if (iterator.this_arg[3] == 1)
2070 rate_flags |=
2071 IEEE80211_TX_RC_40_MHZ_WIDTH;
2072 else if (iterator.this_arg[3] == 4)
2073 rate_flags |=
2074 IEEE80211_TX_RC_80_MHZ_WIDTH;
2075 else if (iterator.this_arg[3] == 11)
2076 rate_flags |=
2077 IEEE80211_TX_RC_160_MHZ_WIDTH;
2078 }
2079
2080 vht_mcs = iterator.this_arg[4] >> 4;
2081 vht_nss = iterator.this_arg[4] & 0xF;
2082 break;
2083
73b9f03a
JB		 2084 /*
2085 * Please update the file
2086 * Documentation/networking/mac80211-injection.txt
2087 * when parsing new fields here.
2088 */
2089
2090 default:
2091 break;
2092 }
2093 }
2094
2095 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2096 return false;
2097
dfdfc2be
SE		 2098 if (rate_found) {
2099 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2100
2101 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2102 info->control.rates[i].idx = -1;
2103 info->control.rates[i].flags = 0;
2104 info->control.rates[i].count = 0;
2105 }
2106
2107 if (rate_flags & IEEE80211_TX_RC_MCS) {
2108 info->control.rates[0].idx = rate;
646e76bb
LB		 2109 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2110 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2111 vht_nss);
dfdfc2be
SE		 2112 } else {
2113 for (i = 0; i < sband->n_bitrates; i++) {
2114 if (rate * 5 != sband->bitrates[i].bitrate)
2115 continue;
2116
2117 info->control.rates[0].idx = i;
2118 break;
2119 }
2120 }
2121
07310a63
FF		 2122 if (info->control.rates[0].idx < 0)
2123 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2124
dfdfc2be
SE		 2125 info->control.rates[0].flags = rate_flags;
2126 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2127 local->hw.max_rate_tries);
2128 }
2129
73b9f03a
JB		 2130 /*
2131 * remove the radiotap header
2132 * iterator->_max_length was sanity-checked against
2133 * skb->len by iterator init
2134 */
2135 skb_pull(skb, iterator._max_length);
2136
2137 return true;
2138}
2139
d0cf9c0d
SH		 2140netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2141 struct net_device *dev)
e2ebc74d
JB		 2142{
2143 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2144 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2145 struct ieee80211_radiotap_header *prthdr =
2146 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2147 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2148 struct ieee80211_hdr *hdr;
5d9cf4a5 2149 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2150 struct cfg80211_chan_def *chandef;
9b8a74e3 2151 u16 len_rthdr;
5d9cf4a5 2152 int hdrlen;
e2ebc74d 2153
9b8a74e3
AG		 2154 /* check for not even having the fixed radiotap header part */
2155 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2156 goto fail; /* too short to be possibly valid */
2157
2158 /* is it a header version we can trust to find length from? */
2159 if (unlikely(prthdr->it_version))
2160 goto fail; /* only version 0 is supported */
2161
2162 /* then there must be a radiotap header with a length we can use */
2163 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2164
2165 /* does the skb contain enough to deliver on the alleged length? */
2166 if (unlikely(skb->len < len_rthdr))
2167 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2168
e2ebc74d
JB		 2169 /*
2170 * fix up the pointers accounting for the radiotap
2171 * header still being in there. We are being given
2172 * a precooked IEEE80211 header so no need for
2173 * normal processing
2174 */
9b8a74e3 2175 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2176 /*
9b8a74e3
AG		 2177 * these are just fixed to the end of the rt area since we
2178 * don't have any better information and at this point, nobody cares
e2ebc74d 2179 */
9b8a74e3
AG		 2180 skb_set_network_header(skb, len_rthdr);
2181 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2182
5d9cf4a5
JB		 2183 if (skb->len < len_rthdr + 2)
2184 goto fail;
2185
2186 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2187 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2188
2189 if (skb->len < len_rthdr + hdrlen)
2190 goto fail;
2191
f75f5c6f
HS		 2192 /*
2193 * Initialize skb->protocol if the injected frame is a data frame
2194 * carrying a rfc1042 header
2195 */
5d9cf4a5
JB		 2196 if (ieee80211_is_data(hdr->frame_control) &&
2197 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2198 u8 *payload = (u8 *)hdr + hdrlen;
2199
b203ca39 2200 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2201 skb->protocol = cpu_to_be16((payload[6] << 8) |
2202 payload[7]);
f75f5c6f
HS		 2203 }
2204
3b8d81e0
JB		 2205 memset(info, 0, sizeof(*info));
2206
5d9cf4a5 2207 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2208 IEEE80211_TX_CTL_INJECTED;
2209
5d9cf4a5
JB		 2210 rcu_read_lock();
2211
2212 /*
2213 * We process outgoing injected frames that have a local address
2214 * we handle as though they are non-injected frames.
2215 * This code here isn't entirely correct, the local MAC address
2216 * isn't always enough to find the interface to use; for proper
2217 * VLAN/WDS support we will need a different mechanism (which
2218 * likely isn't going to be monitor interfaces).
2219 */
2220 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2221
2222 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2223 if (!ieee80211_sdata_running(tmp_sdata))
2224 continue;
2225 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2226 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2227 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2228 continue;
b203ca39 2229 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2230 sdata = tmp_sdata;
2231 break;
2232 }
2233 }
7351c6bd 2234
55de908a
JB		 2235 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2236 if (!chanctx_conf) {
2237 tmp_sdata = rcu_dereference(local->monitor_sdata);
2238 if (tmp_sdata)
2239 chanctx_conf =
2240 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2241 }
55de908a 2242
b4a7ff75 2243 if (chanctx_conf)
b4932836 2244 chandef = &chanctx_conf->def;
b4a7ff75 2245 else if (!local->use_chanctx)
b4932836 2246 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2247 else
2248 goto fail_rcu;
55de908a
JB		 2249
2250 /*
2251 * Frame injection is not allowed if beaconing is not allowed
2252 * or if we need radar detection. Beaconing is usually not allowed when
2253 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2254 * Passive scan is also used in world regulatory domains where
2255 * your country is not known and as such it should be treated as
2256 * NO TX unless the channel is explicitly allowed in which case
2257 * your current regulatory domain would not have the passive scan
2258 * flag.
2259 *
2260 * Since AP mode uses monitor interfaces to inject/TX management
2261 * frames we can make AP mode the exception to this rule once it
2262 * supports radar detection as its implementation can deal with
2263 * radar detection by itself. We can do that later by adding a
2264 * monitor flag interfaces used for AP support.
2265 */
b4932836
JD		 2266 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2267 sdata->vif.type))
55de908a
JB		 2268 goto fail_rcu;
2269
73c4e195 2270 info->band = chandef->chan->band;
109843b0
LB		 2271
2272 /* process and remove the injection radiotap header */
2273 if (!ieee80211_parse_tx_radiotap(local, skb))
2274 goto fail_rcu;
2275
7c10770f 2276 ieee80211_xmit(sdata, NULL, skb);
5d9cf4a5
JB		 2277 rcu_read_unlock();
2278
e2ebc74d 2279 return NETDEV_TX_OK;
9b8a74e3 2280
55de908a
JB		 2281fail_rcu:
2282 rcu_read_unlock();
9b8a74e3
AG		 2283fail:
2284 dev_kfree_skb(skb);
2285 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2286}
2287
97ffe757 2288static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2289{
97ffe757 2290 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2291
97ffe757
JB		 2292 return ethertype == ETH_P_TDLS &&
2293 skb->len > 14 &&
2294 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2295}
2296
2297static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2298 struct sk_buff *skb,
2299 struct sta_info **sta_out)
2300{
2301 struct sta_info *sta;
2302
2303 switch (sdata->vif.type) {
2304 case NL80211_IFTYPE_AP_VLAN:
2305 sta = rcu_dereference(sdata->u.vlan.sta);
2306 if (sta) {
2307 *sta_out = sta;
2308 return 0;
2309 } else if (sdata->wdev.use_4addr) {
2310 return -ENOLINK;
2311 }
2312 /* fall through */
2313 case NL80211_IFTYPE_AP:
2314 case NL80211_IFTYPE_OCB:
2315 case NL80211_IFTYPE_ADHOC:
2316 if (is_multicast_ether_addr(skb->data)) {
2317 *sta_out = ERR_PTR(-ENOENT);
2318 return 0;
2319 }
2320 sta = sta_info_get_bss(sdata, skb->data);
2321 break;
2322 case NL80211_IFTYPE_WDS:
2323 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2324 break;
2325#ifdef CONFIG_MAC80211_MESH
2326 case NL80211_IFTYPE_MESH_POINT:
2327 /* determined much later */
2328 *sta_out = NULL;
2329 return 0;
2330#endif
2331 case NL80211_IFTYPE_STATION:
2332 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2333 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2334 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2335 if (test_sta_flag(sta,
2336 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2337 *sta_out = sta;
2338 return 0;
2339 }
2340
2341 /*
2342 * TDLS link during setup - throw out frames to
2343 * peer. Allow TDLS-setup frames to unauthorized
2344 * peers for the special case of a link teardown
2345 * after a TDLS sta is removed due to being
2346 * unreachable.
2347 */
11d62caf 2348 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2349 return -EINVAL;
2350 }
2351
2352 }
2353
2354 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2355 if (!sta)
2356 return -ENOLINK;
2357 break;
2358 default:
2359 return -EINVAL;
2360 }
2361
2362 *sta_out = sta ?: ERR_PTR(-ENOENT);
2363 return 0;
ad38bfc9
MG		 2364}
2365
e2ebc74d 2366/**
4c9451ed
JB		 2367 * ieee80211_build_hdr - build 802.11 header in the given frame
2368 * @sdata: virtual interface to build the header for
2369 * @skb: the skb to build the header in
24d342c5 2370 * @info_flags: skb flags to set
e2ebc74d 2371 *
4c9451ed
JB		 2372 * This function takes the skb with 802.3 header and reformats the header to
2373 * the appropriate IEEE 802.11 header based on which interface the packet is
2374 * being transmitted on.
2375 *
2376 * Note that this function also takes care of the TX status request and
2377 * potential unsharing of the SKB - this needs to be interleaved with the
2378 * header building.
e2ebc74d 2379 *
4c9451ed
JB		 2380 * The function requires the read-side RCU lock held
2381 *
2382 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2383 */
4c9451ed 2384static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2385 struct sk_buff *skb, u32 info_flags,
97ffe757 2386 struct sta_info *sta)
e2ebc74d 2387{
133b8226 2388 struct ieee80211_local *local = sdata->local;
489ee919 2389 struct ieee80211_tx_info *info;
dcf33963 2390 int head_need;
065e9605
HH		 2391 u16 ethertype, hdrlen, meshhdrlen = 0;
2392 __le16 fc;
e2ebc74d 2393 struct ieee80211_hdr hdr;
ff67bb86 2394 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2395 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2396 const u8 *encaps_data;
2397 int encaps_len, skip_header_bytes;
97ffe757
JB		 2398 bool wme_sta = false, authorized = false;
2399 bool tdls_peer;
a729cff8 2400 bool multicast;
a729cff8 2401 u16 info_id = 0;
55de908a
JB		 2402 struct ieee80211_chanctx_conf *chanctx_conf;
2403 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2404 enum nl80211_band band;
4c9451ed 2405 int ret;
e2ebc74d 2406
97ffe757
JB		 2407 if (IS_ERR(sta))
2408 sta = NULL;
2409
e2ebc74d
JB		 2410 /* convert Ethernet header to proper 802.11 header (based on
2411 * operation mode) */
2412 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2413 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2414
51fb61e7 2415 switch (sdata->vif.type) {
05c914fe 2416 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2417 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2418 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2419 /* RA TA DA SA */
2420 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2421 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2422 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2423 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2424 hdrlen = 30;
c2c98fde 2425 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2426 wme_sta = sta->sta.wme;
f14543ee 2427 }
55de908a
JB		 2428 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2429 u.ap);
2430 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2431 if (!chanctx_conf) {
2432 ret = -ENOTCONN;
2433 goto free;
2434 }
4bf88530 2435 band = chanctx_conf->def.chan->band;
97ffe757 2436 if (sdata->wdev.use_4addr)
f14543ee
FF		 2437 break;
2438 /* fall through */
2439 case NL80211_IFTYPE_AP:
fe80123d
AB		 2440 if (sdata->vif.type == NL80211_IFTYPE_AP)
2441 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2442 if (!chanctx_conf) {
2443 ret = -ENOTCONN;
2444 goto free;
2445 }
065e9605 2446 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2447 /* DA BSSID SA */
2448 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2449 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2450 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2451 hdrlen = 24;
4bf88530 2452 band = chanctx_conf->def.chan->band;
cf966838 2453 break;
05c914fe 2454 case NL80211_IFTYPE_WDS:
065e9605 2455 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2456 /* RA TA DA SA */
2457 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2458 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2459 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2460 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2461 hdrlen = 30;
55de908a
JB		 2462 /*
2463 * This is the exception! WDS style interfaces are prohibited
2464 * when channel contexts are in used so this must be valid
2465 */
675a0b04 2466 band = local->hw.conf.chandef.chan->band;
cf966838 2467 break;
33b64eb2 2468#ifdef CONFIG_MAC80211_MESH
05c914fe 2469 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2470 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2471 struct sta_info *next_hop;
2472 bool mpp_lookup = true;
2473
bf7cd94d 2474 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2475 if (mpath) {
2476 mpp_lookup = false;
2477 next_hop = rcu_dereference(mpath->next_hop);
2478 if (!next_hop ||
2479 !(mpath->flags & (MESH_PATH_ACTIVE |
2480 MESH_PATH_RESOLVING)))
2481 mpp_lookup = true;
2482 }
2483
ab1c7906 2484 if (mpp_lookup) {
bf7cd94d 2485 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2486 if (mppath)
2487 mppath->exp_time = jiffies;
2488 }
163df6cf
CYY		 2489
2490 if (mppath && mpath)
2bdaf386 2491 mesh_path_del(sdata, mpath->dst);
b8bacc18 2492 }
79617dee 2493
f76b57b4 2494 /*
9d52501b
JF		 2495 * Use address extension if it is a packet from
2496 * another interface or if we know the destination
2497 * is being proxied by a portal (i.e. portal address
2498 * differs from proxied address)
f76b57b4 2499 */
b203ca39
JP		 2500 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2501 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2502 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2503 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2504 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2505 NULL, NULL);
79617dee 2506 } else {
27f01124
TP		 2507 /* DS -> MBSS (802.11-2012 13.11.3.3).
2508 * For unicast with unknown forwarding information,
2509 * destination might be in the MBSS or if that fails
2510 * forwarded to another mesh gate. In either case
2511 * resolution will be handled in ieee80211_xmit(), so
2512 * leave the original DA. This also works for mcast */
2513 const u8 *mesh_da = skb->data;
2514
2515 if (mppath)
2516 mesh_da = mppath->mpp;
2517 else if (mpath)
2518 mesh_da = mpath->dst;
79617dee 2519
3c5772a5 2520 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2521 mesh_da, sdata->vif.addr);
27f01124
TP		 2522 if (is_multicast_ether_addr(mesh_da))
2523 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2524 meshhdrlen = ieee80211_new_mesh_header(
2525 sdata, &mesh_hdr,
2526 skb->data + ETH_ALEN, NULL);
3c5772a5 2527 else
27f01124 2528 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2529 meshhdrlen = ieee80211_new_mesh_header(
2530 sdata, &mesh_hdr, skb->data,
2531 skb->data + ETH_ALEN);
79617dee 2532
79617dee 2533 }
55de908a 2534 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2535 if (!chanctx_conf) {
2536 ret = -ENOTCONN;
2537 goto free;
2538 }
4bf88530 2539 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 2540 break;
2541#endif
05c914fe 2542 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2543 /* we already did checks when looking up the RA STA */
2544 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2545
97ffe757 2546 if (tdls_peer) {
941c93cd
AN		 2547 /* DA SA BSSID */
2548 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2549 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2550 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2551 hdrlen = 24;
2552 } else if (sdata->u.mgd.use_4addr &&
2553 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2554 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2555 IEEE80211_FCTL_TODS);
f14543ee 2556 /* RA TA DA SA */
941c93cd 2557 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2558 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2559 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2560 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2561 hdrlen = 30;
2562 } else {
2563 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2564 /* BSSID SA DA */
941c93cd 2565 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2566 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2567 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2568 hdrlen = 24;
2569 }
55de908a 2570 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2571 if (!chanctx_conf) {
2572 ret = -ENOTCONN;
2573 goto free;
2574 }
4bf88530 2575 band = chanctx_conf->def.chan->band;
cf966838 2576 break;
239281f8
RL		 2577 case NL80211_IFTYPE_OCB:
2578 /* DA SA BSSID */
2579 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2580 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2581 eth_broadcast_addr(hdr.addr3);
2582 hdrlen = 24;
2583 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2584 if (!chanctx_conf) {
2585 ret = -ENOTCONN;
2586 goto free;
2587 }
239281f8
RL		 2588 band = chanctx_conf->def.chan->band;
2589 break;
05c914fe 2590 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2591 /* DA SA BSSID */
2592 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2593 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2594 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2595 hdrlen = 24;
55de908a 2596 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2597 if (!chanctx_conf) {
2598 ret = -ENOTCONN;
2599 goto free;
2600 }
4bf88530 2601 band = chanctx_conf->def.chan->band;
cf966838
JB		 2602 break;
2603 default:
4c9451ed
JB		 2604 ret = -EINVAL;
2605 goto free;
e2ebc74d
JB		 2606 }
2607
a729cff8 2608 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2609
97ffe757
JB		 2610 /* sta is always NULL for mesh */
2611 if (sta) {
2612 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2613 wme_sta = sta->sta.wme;
2614 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2615 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2616 wme_sta = true;
97ffe757 2617 }
4777be41 2618
527871d7
JB		 2619 /* receiver does QoS (which also means we do) use it */
2620 if (wme_sta) {
065e9605 2621 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2622 hdrlen += 2;
2623 }
2624
2625 /*
238814fd
JB		 2626 * Drop unicast frames to unauthorised stations unless they are
2627 * EAPOL frames from the local station.
ce3edf6d 2628 */
55182e4a 2629 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2630 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2631 !multicast && !authorized &&
55182e4a 2632 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2633 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2634#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2635 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2636 sdata->name, hdr.addr1);
ce3edf6d
JB		 2637#endif
2638
2639 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2640
4c9451ed
JB		 2641 ret = -EPERM;
2642 goto free;
ce3edf6d
JB		 2643 }
2644
a729cff8
JB		 2645 if (unlikely(!multicast && skb->sk &&
2646 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
bf7fa551 2647 struct sk_buff *ack_skb = skb_clone_sk(skb);
a729cff8 2648
bf7fa551 2649 if (ack_skb) {
a729cff8 2650 unsigned long flags;
9475af6e 2651 int id;
a729cff8
JB		 2652
2653 spin_lock_irqsave(&local->ack_status_lock, flags);
bf7fa551 2654 id = idr_alloc(&local->ack_status_frames, ack_skb,
9475af6e 2655 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2656 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2657
9475af6e 2658 if (id >= 0) {
a729cff8
JB		 2659 info_id = id;
2660 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a729cff8 2661 } else {
bf7fa551 2662 kfree_skb(ack_skb);
a729cff8 2663 }
a729cff8
JB		 2664 }
2665 }
2666
7e244707
HS		 2667 /*
2668 * If the skb is shared we need to obtain our own copy.
2669 */
2670 if (skb_shared(skb)) {
a729cff8
JB		 2671 struct sk_buff *tmp_skb = skb;
2672
2673 /* can't happen -- skb is a clone if info_id != 0 */
2674 WARN_ON(info_id);
2675
f8a0a781 2676 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2677 kfree_skb(tmp_skb);
2678
4c9451ed
JB		 2679 if (!skb) {
2680 ret = -ENOMEM;
2681 goto free;
2682 }
7e244707
HS		 2683 }
2684
065e9605 2685 hdr.frame_control = fc;
e2ebc74d
JB		 2686 hdr.duration_id = 0;
2687 hdr.seq_ctrl = 0;
2688
2689 skip_header_bytes = ETH_HLEN;
2690 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2691 encaps_data = bridge_tunnel_header;
2692 encaps_len = sizeof(bridge_tunnel_header);
2693 skip_header_bytes -= 2;
e5c5d22e 2694 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2695 encaps_data = rfc1042_header;
2696 encaps_len = sizeof(rfc1042_header);
2697 skip_header_bytes -= 2;
2698 } else {
2699 encaps_data = NULL;
2700 encaps_len = 0;
2701 }
2702
2703 skb_pull(skb, skip_header_bytes);
23c0752a 2704 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2705
23c0752a
JB		 2706 /*
2707 * So we need to modify the skb header and hence need a copy of
2708 * that. The head_need variable above doesn't, so far, include
2709 * the needed header space that we don't need right away. If we
2710 * can, then we don't reallocate right now but only after the
2711 * frame arrives at the master device (if it does...)
2712 *
2713 * If we cannot, however, then we will reallocate to include all
2714 * the ever needed space. Also, if we need to reallocate it anyway,
2715 * make it big enough for everything we may ever need.
2716 */
e2ebc74d 2717
3a5be7d4 2718 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2719 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2720 head_need += local->tx_headroom;
2721 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2722 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2723 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2724 skb = NULL;
4c9451ed 2725 return ERR_PTR(-ENOMEM);
c3e7724b 2726 }
e2ebc74d
JB		 2727 }
2728
eae4430e 2729 if (encaps_data)
e2ebc74d 2730 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2731
e4ab7eb0 2732#ifdef CONFIG_MAC80211_MESH
eae4430e 2733 if (meshhdrlen > 0)
33b64eb2 2734 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2735#endif
33b64eb2 2736
065e9605 2737 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2738 __le16 *qos_control;
2739
d58ff351 2740 qos_control = skb_push(skb, 2);
c29b9b9b
JB		 2741 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2742 /*
2743 * Maybe we could actually set some fields here, for now just
2744 * initialise to zero to indicate no special operation.
2745 */
2746 *qos_control = 0;
2747 } else
2748 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2749
d57a544d 2750 skb_reset_mac_header(skb);
e2ebc74d 2751
489ee919 2752 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2753 memset(info, 0, sizeof(*info));
2754
a729cff8
JB		 2755 info->flags = info_flags;
2756 info->ack_frame_id = info_id;
73c4e195 2757 info->band = band;
a729cff8 2758
4c9451ed
JB		 2759 return skb;
2760 free:
2761 kfree_skb(skb);
2762 return ERR_PTR(ret);
2763}
2764
17c18bf8
JB		 2765/*
2766 * fast-xmit overview
2767 *
2768 * The core idea of this fast-xmit is to remove per-packet checks by checking
2769 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2770 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2771 * much less work can be done per packet. For example, fragmentation must be
2772 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2773 * in the code here.
2774 *
2775 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2776 * header and other data to aid packet processing in ieee80211_xmit_fast().
2777 *
2778 * The most difficult part of this is that when any of these assumptions
2779 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2780 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2781 * since the per-packet code no longer checks the conditions. This is reflected
2782 * by the calls to these functions throughout the rest of the code, and must be
2783 * maintained if any of the TX path checks change.
2784 */
2785
2786void ieee80211_check_fast_xmit(struct sta_info *sta)
2787{
2788 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2789 struct ieee80211_local *local = sta->local;
2790 struct ieee80211_sub_if_data *sdata = sta->sdata;
2791 struct ieee80211_hdr *hdr = (void *)build.hdr;
2792 struct ieee80211_chanctx_conf *chanctx_conf;
2793 __le16 fc;
2794
30686bf7 2795 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2796 return;
2797
2798 /* Locking here protects both the pointer itself, and against concurrent
2799 * invocations winning data access races to, e.g., the key pointer that
2800 * is used.
2801 * Without it, the invocation of this function right after the key
2802 * pointer changes wouldn't be sufficient, as another CPU could access
2803 * the pointer, then stall, and then do the cache update after the CPU
2804 * that invalidated the key.
2805 * With the locking, such scenarios cannot happen as the check for the
2806 * key and the fast-tx assignment are done atomically, so the CPU that
2807 * modifies the key will either wait or other one will see the key
2808 * cleared/changed already.
2809 */
2810 spin_lock_bh(&sta->lock);
30686bf7
JB		 2811 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2812 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2813 sdata->vif.type == NL80211_IFTYPE_STATION)
2814 goto out;
2815
2816 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2817 goto out;
2818
2819 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2820 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2821 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2822 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2823 goto out;
2824
2825 if (sdata->noack_map)
2826 goto out;
2827
2828 /* fast-xmit doesn't handle fragmentation at all */
725b812c 2829 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
f3fe4e93 2830 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
17c18bf8
JB		 2831 goto out;
2832
2833 rcu_read_lock();
2834 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2835 if (!chanctx_conf) {
2836 rcu_read_unlock();
2837 goto out;
2838 }
2839 build.band = chanctx_conf->def.chan->band;
2840 rcu_read_unlock();
2841
2842 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2843
2844 switch (sdata->vif.type) {
3ffd8840
JB		 2845 case NL80211_IFTYPE_ADHOC:
2846 /* DA SA BSSID */
2847 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2848 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2849 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2850 build.hdr_len = 24;
2851 break;
17c18bf8
JB		 2852 case NL80211_IFTYPE_STATION:
2853 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2854 /* DA SA BSSID */
2855 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2856 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2857 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2858 build.hdr_len = 24;
2859 break;
2860 }
2861
2862 if (sdata->u.mgd.use_4addr) {
2863 /* non-regular ethertype cannot use the fastpath */
2864 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2865 IEEE80211_FCTL_TODS);
2866 /* RA TA DA SA */
2867 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2868 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2869 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2870 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2871 build.hdr_len = 30;
2872 break;
2873 }
2874 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2875 /* BSSID SA DA */
2876 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2877 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2878 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2879 build.hdr_len = 24;
2880 break;
2881 case NL80211_IFTYPE_AP_VLAN:
2882 if (sdata->wdev.use_4addr) {
2883 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2884 IEEE80211_FCTL_TODS);
2885 /* RA TA DA SA */
2886 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2887 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2888 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2889 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2890 build.hdr_len = 30;
2891 break;
2892 }
2893 /* fall through */
2894 case NL80211_IFTYPE_AP:
2895 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2896 /* DA BSSID SA */
2897 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2898 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2899 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2900 build.hdr_len = 24;
2901 break;
2902 default:
2903 /* not handled on fast-xmit */
2904 goto out;
2905 }
2906
2907 if (sta->sta.wme) {
2908 build.hdr_len += 2;
2909 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2910 }
2911
2912 /* We store the key here so there's no point in using rcu_dereference()
2913 * but that's fine because the code that changes the pointers will call
2914 * this function after doing so. For a single CPU that would be enough,
2915 * for multiple see the comment above.
2916 */
2917 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2918 if (!build.key)
2919 build.key = rcu_access_pointer(sdata->default_unicast_key);
2920 if (build.key) {
e495c247 2921 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 2922
2923 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2924 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
9de18d81
DS		 2925 mmic = build.key->conf.flags &
2926 (IEEE80211_KEY_FLAG_GENERATE_MMIC |
2927 IEEE80211_KEY_FLAG_PUT_MIC_SPACE);
17c18bf8
JB		 2928
2929 /* don't handle software crypto */
2930 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2931 goto out;
2932
2933 switch (build.key->conf.cipher) {
2934 case WLAN_CIPHER_SUITE_CCMP:
2935 case WLAN_CIPHER_SUITE_CCMP_256:
2936 /* add fixed key ID */
2937 if (gen_iv) {
2938 (build.hdr + build.hdr_len)[3] =
2939 0x20 | (build.key->conf.keyidx << 6);
2940 build.pn_offs = build.hdr_len;
2941 }
2942 if (gen_iv || iv_spc)
2943 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2944 break;
2945 case WLAN_CIPHER_SUITE_GCMP:
2946 case WLAN_CIPHER_SUITE_GCMP_256:
2947 /* add fixed key ID */
2948 if (gen_iv) {
2949 (build.hdr + build.hdr_len)[3] =
2950 0x20 | (build.key->conf.keyidx << 6);
2951 build.pn_offs = build.hdr_len;
2952 }
2953 if (gen_iv || iv_spc)
2954 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2955 break;
e495c247
JB		 2956 case WLAN_CIPHER_SUITE_TKIP:
2957 /* cannot handle MMIC or IV generation in xmit-fast */
2958 if (mmic || gen_iv)
2959 goto out;
2960 if (iv_spc)
2961 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2962 break;
2963 case WLAN_CIPHER_SUITE_WEP40:
2964 case WLAN_CIPHER_SUITE_WEP104:
2965 /* cannot handle IV generation in fast-xmit */
2966 if (gen_iv)
2967 goto out;
2968 if (iv_spc)
2969 build.hdr_len += IEEE80211_WEP_IV_LEN;
2970 break;
2971 case WLAN_CIPHER_SUITE_AES_CMAC:
2972 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2973 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2974 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2975 WARN(1,
2976 "management cipher suite 0x%x enabled for data\n",
2977 build.key->conf.cipher);
17c18bf8 2978 goto out;
e495c247
JB		 2979 default:
2980 /* we don't know how to generate IVs for this at all */
2981 if (WARN_ON(gen_iv))
2982 goto out;
2983 /* pure hardware keys are OK, of course */
2984 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2985 break;
2986 /* cipher scheme might require space allocation */
2987 if (iv_spc &&
2988 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2989 goto out;
2990 if (iv_spc)
2991 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 2992 }
2993
2994 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2995 }
2996
2997 hdr->frame_control = fc;
2998
2999 memcpy(build.hdr + build.hdr_len,
3000 rfc1042_header, sizeof(rfc1042_header));
3001 build.hdr_len += sizeof(rfc1042_header);
3002
3003 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
3004 /* if the kmemdup fails, continue w/o fast_tx */
3005 if (!fast_tx)
3006 goto out;
3007
3008 out:
3009 /* we might have raced against another call to this function */
3010 old = rcu_dereference_protected(sta->fast_tx,
3011 lockdep_is_held(&sta->lock));
3012 rcu_assign_pointer(sta->fast_tx, fast_tx);
3013 if (old)
3014 kfree_rcu(old, rcu_head);
3015 spin_unlock_bh(&sta->lock);
3016}
3017
3018void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
3019{
3020 struct sta_info *sta;
3021
3022 rcu_read_lock();
3023 list_for_each_entry_rcu(sta, &local->sta_list, list)
3024 ieee80211_check_fast_xmit(sta);
3025 rcu_read_unlock();
3026}
3027
3028void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
3029{
3030 struct ieee80211_local *local = sdata->local;
3031 struct sta_info *sta;
3032
3033 rcu_read_lock();
3034
3035 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3036 if (sdata != sta->sdata &&
3037 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3038 continue;
3039 ieee80211_check_fast_xmit(sta);
3040 }
3041
3042 rcu_read_unlock();
3043}
3044
3045void ieee80211_clear_fast_xmit(struct sta_info *sta)
3046{
3047 struct ieee80211_fast_tx *fast_tx;
3048
3049 spin_lock_bh(&sta->lock);
3050 fast_tx = rcu_dereference_protected(sta->fast_tx,
3051 lockdep_is_held(&sta->lock));
3052 RCU_INIT_POINTER(sta->fast_tx, NULL);
3053 spin_unlock_bh(&sta->lock);
3054
3055 if (fast_tx)
3056 kfree_rcu(fast_tx, rcu_head);
3057}
3058
6e0456b5
FF		 3059static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3060 struct sk_buff *skb, int headroom,
3061 int *subframe_len)
3062{
3063 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3064 int padding = (4 - amsdu_len) & 3;
3065
3066 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3067 I802_DEBUG_INC(local->tx_expand_skb_head);
3068
3069 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3070 wiphy_debug(local->hw.wiphy,
3071 "failed to reallocate TX buffer\n");
3072 return false;
3073 }
3074 }
3075
3076 if (padding) {
3077 *subframe_len += padding;
b080db58 3078 skb_put_zero(skb, padding);
6e0456b5
FF		 3079 }
3080
3081 return true;
3082}
3083
3084static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3085 struct ieee80211_fast_tx *fast_tx,
3086 struct sk_buff *skb)
3087{
3088 struct ieee80211_local *local = sdata->local;
3089 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3090 struct ieee80211_hdr *hdr;
06f2bb1e 3091 struct ethhdr *amsdu_hdr;
6e0456b5
FF		 3092 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3093 int subframe_len = skb->len - hdr_len;
3094 void *data;
06f2bb1e 3095 u8 *qc, *h_80211_src, *h_80211_dst;
a3e2f4b6 3096 const u8 *bssid;
6e0456b5
FF		 3097
3098 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3099 return false;
3100
3101 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3102 return true;
3103
06f2bb1e 3104 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr),
6e0456b5
FF		 3105 &subframe_len))
3106 return false;
3107
06f2bb1e
MB		 3108 data = skb_push(skb, sizeof(*amsdu_hdr));
3109 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3110 hdr = data;
3111 amsdu_hdr = data + hdr_len;
3112 /* h_80211_src/dst is addr* field within hdr */
3113 h_80211_src = data + fast_tx->sa_offs;
3114 h_80211_dst = data + fast_tx->da_offs;
6e0456b5 3115
06f2bb1e
MB		 3116 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3117 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3118 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
6e0456b5 3119
a3e2f4b6
MB		 3120 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3121 * fields needs to be changed to BSSID for A-MSDU frames depending
3122 * on FromDS/ToDS values.
3123 */
3124 switch (sdata->vif.type) {
3125 case NL80211_IFTYPE_STATION:
3126 bssid = sdata->u.mgd.bssid;
3127 break;
3128 case NL80211_IFTYPE_AP:
3129 case NL80211_IFTYPE_AP_VLAN:
3130 bssid = sdata->vif.addr;
3131 break;
3132 default:
3133 bssid = NULL;
3134 }
3135
3136 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3137 ether_addr_copy(h_80211_src, bssid);
3138
3139 if (bssid && ieee80211_has_tods(hdr->frame_control))
3140 ether_addr_copy(h_80211_dst, bssid);
3141
6e0456b5
FF		 3142 qc = ieee80211_get_qos_ctl(hdr);
3143 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3144
3145 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3146
3147 return true;
3148}
3149
3150static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3151 struct sta_info *sta,
3152 struct ieee80211_fast_tx *fast_tx,
3153 struct sk_buff *skb)
3154{
3155 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3156 struct fq *fq = &local->fq;
3157 struct fq_tin *tin;
3158 struct fq_flow *flow;
6e0456b5
FF		 3159 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3160 struct ieee80211_txq *txq = sta->sta.txq[tid];
3161 struct txq_info *txqi;
3162 struct sk_buff **frag_tail, *head;
3163 int subframe_len = skb->len - ETH_ALEN;
3164 u8 max_subframes = sta->sta.max_amsdu_subframes;
3165 int max_frags = local->hw.max_tx_fragments;
3166 int max_amsdu_len = sta->sta.max_amsdu_len;
3167 __be16 len;
3168 void *data;
3169 bool ret = false;
fa962b92 3170 unsigned int orig_len;
6e0456b5
FF		 3171 int n = 1, nfrags;
3172
3173 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3174 return false;
3175
3176 if (!txq)
3177 return false;
3178
3179 txqi = to_txq_info(txq);
3180 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3181 return false;
3182
3183 if (sta->sta.max_rc_amsdu_len)
3184 max_amsdu_len = min_t(int, max_amsdu_len,
3185 sta->sta.max_rc_amsdu_len);
3186
fa962b92 3187 spin_lock_bh(&fq->lock);
6e0456b5 3188
fa962b92
MK		 3189 /* TODO: Ideally aggregation should be done on dequeue to remain
3190 * responsive to environment changes.
3191 */
3192
3193 tin = &txqi->tin;
3194 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3195 head = skb_peek_tail(&flow->queue);
6e0456b5
FF		 3196 if (!head)
3197 goto out;
3198
fa962b92
MK		 3199 orig_len = head->len;
3200
6e0456b5
FF		 3201 if (skb->len + head->len > max_amsdu_len)
3202 goto out;
3203
3204 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3205 goto out;
3206
3207 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3208 nfrags += 1 + skb_shinfo(head)->nr_frags;
3209 frag_tail = &skb_shinfo(head)->frag_list;
3210 while (*frag_tail) {
3211 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3212 frag_tail = &(*frag_tail)->next;
3213 n++;
3214 }
3215
3216 if (max_subframes && n > max_subframes)
3217 goto out;
3218
3219 if (max_frags && nfrags > max_frags)
3220 goto out;
3221
3222 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3223 &subframe_len))
3224 goto out;
3225
3226 ret = true;
3227 data = skb_push(skb, ETH_ALEN + 2);
3228 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3229
3230 data += 2 * ETH_ALEN;
3231 len = cpu_to_be16(subframe_len);
3232 memcpy(data, &len, 2);
3233 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3234
3235 head->len += skb->len;
3236 head->data_len += skb->len;
3237 *frag_tail = skb;
3238
fa962b92
MK		 3239 flow->backlog += head->len - orig_len;
3240 tin->backlog_bytes += head->len - orig_len;
3241
3242 fq_recalc_backlog(fq, tin, flow);
3243
6e0456b5 3244out:
fa962b92 3245 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3246
3247 return ret;
3248}
3249
bb42f2d1
THJ		 3250/*
3251 * Can be called while the sta lock is held. Anything that can cause packets to
3252 * be generated will cause deadlock!
3253 */
3254static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3255 struct sta_info *sta, u8 pn_offs,
3256 struct ieee80211_key *key,
3257 struct sk_buff *skb)
3258{
3259 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3260 struct ieee80211_hdr *hdr = (void *)skb->data;
3261 u8 tid = IEEE80211_NUM_TIDS;
3262
3263 if (key)
3264 info->control.hw_key = &key->conf;
3265
3266 ieee80211_tx_stats(skb->dev, skb->len);
3267
3268 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3269 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
bb42f2d1
THJ		 3270 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3271 } else {
3272 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3273 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3274 sdata->sequence_number += 0x10;
3275 }
3276
3277 if (skb_shinfo(skb)->gso_size)
3278 sta->tx_stats.msdu[tid] +=
3279 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3280 else
3281 sta->tx_stats.msdu[tid]++;
3282
3283 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3284
3285 /* statistics normally done by ieee80211_tx_h_stats (but that
3286 * has to consider fragmentation, so is more complex)
3287 */
3288 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3289 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3290
3291 if (pn_offs) {
3292 u64 pn;
3293 u8 *crypto_hdr = skb->data + pn_offs;
3294
3295 switch (key->conf.cipher) {
3296 case WLAN_CIPHER_SUITE_CCMP:
3297 case WLAN_CIPHER_SUITE_CCMP_256:
3298 case WLAN_CIPHER_SUITE_GCMP:
3299 case WLAN_CIPHER_SUITE_GCMP_256:
3300 pn = atomic64_inc_return(&key->conf.tx_pn);
3301 crypto_hdr[0] = pn;
3302 crypto_hdr[1] = pn >> 8;
3303 crypto_hdr[4] = pn >> 16;
3304 crypto_hdr[5] = pn >> 24;
3305 crypto_hdr[6] = pn >> 32;
3306 crypto_hdr[7] = pn >> 40;
3307 break;
3308 }
3309 }
3310}
3311
17c18bf8 3312static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
bb42f2d1 3313 struct sta_info *sta,
17c18bf8
JB		 3314 struct ieee80211_fast_tx *fast_tx,
3315 struct sk_buff *skb)
3316{
3317 struct ieee80211_local *local = sdata->local;
3318 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3319 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3320 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3321 struct ethhdr eth;
35f432a0 3322 struct ieee80211_tx_info *info;
17c18bf8
JB		 3323 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3324 struct ieee80211_tx_data tx;
3325 ieee80211_tx_result r;
3326 struct tid_ampdu_tx *tid_tx = NULL;
3327 u8 tid = IEEE80211_NUM_TIDS;
3328
3329 /* control port protocol needs a lot of special handling */
3330 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3331 return false;
3332
3333 /* only RFC 1042 SNAP */
3334 if (ethertype < ETH_P_802_3_MIN)
3335 return false;
3336
3337 /* don't handle TX status request here either */
3338 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3339 return false;
3340
3341 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3342 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3343 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3344 if (tid_tx) {
3345 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3346 return false;
3347 if (tid_tx->timeout)
3348 tid_tx->last_tx = jiffies;
3349 }
17c18bf8
JB		 3350 }
3351
3352 /* after this point (skb is modified) we cannot return false */
3353
3354 if (skb_shared(skb)) {
3355 struct sk_buff *tmp_skb = skb;
3356
3357 skb = skb_clone(skb, GFP_ATOMIC);
3358 kfree_skb(tmp_skb);
3359
3360 if (!skb)
3361 return true;
3362 }
3363
6e0456b5
FF		 3364 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3365 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3366 return true;
3367
17c18bf8
JB		 3368 /* will not be crypto-handled beyond what we do here, so use false
3369 * as the may-encrypt argument for the resize to not account for
3370 * more room than we already have in 'extra_head'
3371 */
3372 if (unlikely(ieee80211_skb_resize(sdata, skb,
3373 max_t(int, extra_head + hw_headroom -
3374 skb_headroom(skb), 0),
3375 false))) {
3376 kfree_skb(skb);
3377 return true;
3378 }
3379
3380 memcpy(&eth, skb->data, ETH_HLEN - 2);
d58ff351 3381 hdr = skb_push(skb, extra_head);
17c18bf8
JB		 3382 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3383 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3384 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3385
35f432a0 3386 info = IEEE80211_SKB_CB(skb);
17c18bf8
JB		 3387 memset(info, 0, sizeof(*info));
3388 info->band = fast_tx->band;
3389 info->control.vif = &sdata->vif;
3390 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3391 IEEE80211_TX_CTL_DONTFRAG |
3392 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
bb42f2d1 3393 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
17c18bf8 3394
a786f96d
FF		 3395 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3396 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3397 *ieee80211_get_qos_ctl(hdr) = tid;
3398 }
3399
17c18bf8
JB		 3400 __skb_queue_head_init(&tx.skbs);
3401
3402 tx.flags = IEEE80211_TX_UNICAST;
3403 tx.local = local;
3404 tx.sdata = sdata;
3405 tx.sta = sta;
3406 tx.key = fast_tx->key;
3407
30686bf7 3408 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3409 tx.skb = skb;
3410 r = ieee80211_tx_h_rate_ctrl(&tx);
3411 skb = tx.skb;
3412 tx.skb = NULL;
3413
3414 if (r != TX_CONTINUE) {
3415 if (r != TX_QUEUED)
3416 kfree_skb(skb);
3417 return true;
3418 }
3419 }
3420
bb42f2d1
THJ		 3421 if (ieee80211_queue_skb(local, sdata, sta, skb))
3422 return true;
17c18bf8 3423
bb42f2d1
THJ		 3424 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3425 fast_tx->key, skb);
17c18bf8
JB		 3426
3427 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3428 sdata = container_of(sdata->bss,
3429 struct ieee80211_sub_if_data, u.ap);
3430
3431 __skb_queue_tail(&tx.skbs, skb);
3432 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3433 return true;
3434}
3435
e0e2efff
THJ		 3436struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3437 struct ieee80211_txq *txq)
3438{
3439 struct ieee80211_local *local = hw_to_local(hw);
3440 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3441 struct ieee80211_hdr *hdr;
3442 struct sk_buff *skb = NULL;
3443 struct fq *fq = &local->fq;
3444 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3445 struct ieee80211_tx_info *info;
3446 struct ieee80211_tx_data tx;
3447 ieee80211_tx_result r;
53168215 3448 struct ieee80211_vif *vif;
e0e2efff
THJ		 3449
3450 spin_lock_bh(&fq->lock);
3451
3452 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3453 goto out;
3454
bb42f2d1
THJ		 3455 /* Make sure fragments stay together. */
3456 skb = __skb_dequeue(&txqi->frags);
3457 if (skb)
3458 goto out;
3459
3460begin:
e0e2efff
THJ		 3461 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3462 if (!skb)
3463 goto out;
3464
e0e2efff 3465 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3466 info = IEEE80211_SKB_CB(skb);
3467
3468 memset(&tx, 0, sizeof(tx));
3469 __skb_queue_head_init(&tx.skbs);
3470 tx.local = local;
3471 tx.skb = skb;
3472 tx.sdata = vif_to_sdata(info->control.vif);
3473
3474 if (txq->sta)
3475 tx.sta = container_of(txq->sta, struct sta_info, sta);
3476
3477 /*
3478 * The key can be removed while the packet was queued, so need to call
3479 * this here to get the current key.
3480 */
3481 r = ieee80211_tx_h_select_key(&tx);
3482 if (r != TX_CONTINUE) {
3483 ieee80211_free_txskb(&local->hw, skb);
3484 goto begin;
3485 }
3486
c1f4c9ed
FF		 3487 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3488 info->flags |= IEEE80211_TX_CTL_AMPDU;
3489 else
3490 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3491
bb42f2d1 3492 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3493 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3494 sta);
bb42f2d1 3495 u8 pn_offs = 0;
e0e2efff 3496
bb42f2d1
THJ		 3497 if (tx.key &&
3498 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3499 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3500
3501 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3502 tx.key, skb);
3503 } else {
3504 if (invoke_tx_handlers_late(&tx))
3505 goto begin;
3506
3507 skb = __skb_dequeue(&tx.skbs);
3508
3509 if (!skb_queue_empty(&tx.skbs))
3510 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
e0e2efff
THJ		 3511 }
3512
1e1430d5
JB		 3513 if (skb && skb_has_frag_list(skb) &&
3514 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3515 if (skb_linearize(skb)) {
3516 ieee80211_free_txskb(&local->hw, skb);
3517 goto begin;
3518 }
3519 }
3520
53168215
JB		 3521 switch (tx.sdata->vif.type) {
3522 case NL80211_IFTYPE_MONITOR:
3523 if (tx.sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
3524 vif = &tx.sdata->vif;
3525 break;
3526 }
3527 tx.sdata = rcu_dereference(local->monitor_sdata);
3528 if (tx.sdata) {
3529 vif = &tx.sdata->vif;
3530 info->hw_queue =
3531 vif->hw_queue[skb_get_queue_mapping(skb)];
3532 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
3533 ieee80211_free_txskb(&local->hw, skb);
3534 goto begin;
3535 } else {
3536 vif = NULL;
3537 }
3538 break;
3539 case NL80211_IFTYPE_AP_VLAN:
3540 tx.sdata = container_of(tx.sdata->bss,
3541 struct ieee80211_sub_if_data, u.ap);
3542 /* fall through */
3543 default:
3544 vif = &tx.sdata->vif;
3545 break;
3546 }
3547
3548 IEEE80211_SKB_CB(skb)->control.vif = vif;
e0e2efff
THJ		 3549out:
3550 spin_unlock_bh(&fq->lock);
3551
e0e2efff
THJ		 3552 return skb;
3553}
3554EXPORT_SYMBOL(ieee80211_tx_dequeue);
3555
4c9451ed
JB		 3556void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3557 struct net_device *dev,
3558 u32 info_flags)
3559{
3560 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
97ffe757 3561 struct sta_info *sta;
80616c0d 3562 struct sk_buff *next;
4c9451ed
JB		 3563
3564 if (unlikely(skb->len < ETH_HLEN)) {
3565 kfree_skb(skb);
3566 return;
3567 }
3568
3569 rcu_read_lock();
e2ebc74d 3570
2d981fdd
JB		 3571 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3572 goto out_free;
4c9451ed 3573
17c18bf8
JB		 3574 if (!IS_ERR_OR_NULL(sta)) {
3575 struct ieee80211_fast_tx *fast_tx;
3576
3577 fast_tx = rcu_dereference(sta->fast_tx);
3578
3579 if (fast_tx &&
bb42f2d1 3580 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 3581 goto out;
3582 }
3583
80616c0d
JB		 3584 if (skb_is_gso(skb)) {
3585 struct sk_buff *segs;
680a0dab 3586
80616c0d
JB		 3587 segs = skb_gso_segment(skb, 0);
3588 if (IS_ERR(segs)) {
2d981fdd 3589 goto out_free;
80616c0d
JB		 3590 } else if (segs) {
3591 consume_skb(skb);
3592 skb = segs;
3593 }
3594 } else {
3595 /* we cannot process non-linear frames on this path */
3596 if (skb_linearize(skb)) {
3597 kfree_skb(skb);
3598 goto out;
3599 }
3600
3601 /* the frame could be fragmented, software-encrypted, and other
3602 * things so we cannot really handle checksum offload with it -
3603 * fix it up in software before we handle anything else.
3604 */
3605 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3606 skb_set_transport_header(skb,
3607 skb_checksum_start_offset(skb));
80616c0d
JB		 3608 if (skb_checksum_help(skb))
3609 goto out_free;
3610 }
2d981fdd
JB		 3611 }
3612
80616c0d
JB		 3613 next = skb;
3614 while (next) {
3615 skb = next;
3616 next = skb->next;
4c9451ed 3617
80616c0d
JB		 3618 skb->prev = NULL;
3619 skb->next = NULL;
3620
3621 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3622 if (IS_ERR(skb))
3623 goto out;
e2ebc74d 3624
5a490510 3625 ieee80211_tx_stats(dev, skb->len);
80616c0d
JB		 3626
3627 ieee80211_xmit(sdata, sta, skb);
3628 }
2d981fdd
JB		 3629 goto out;
3630 out_free:
3631 kfree_skb(skb);
4c9451ed 3632 out:
55de908a 3633 rcu_read_unlock();
e2ebc74d
JB		 3634}
3635
ebceec86
MB		 3636static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3637{
3638 struct ethhdr *eth;
3639 int err;
3640
3641 err = skb_ensure_writable(skb, ETH_HLEN);
3642 if (unlikely(err))
3643 return err;
3644
3645 eth = (void *)skb->data;
3646 ether_addr_copy(eth->h_dest, sta->sta.addr);
3647
3648 return 0;
3649}
3650
3651static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3652 struct net_device *dev)
3653{
3654 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3655 const struct ethhdr *eth = (void *)skb->data;
3656 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3657 __be16 ethertype;
3658
3659 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3660 return false;
3661
3662 switch (sdata->vif.type) {
3663 case NL80211_IFTYPE_AP_VLAN:
3664 if (sdata->u.vlan.sta)
3665 return false;
3666 if (sdata->wdev.use_4addr)
3667 return false;
3668 /* fall through */
3669 case NL80211_IFTYPE_AP:
3670 /* check runtime toggle for this bss */
3671 if (!sdata->bss->multicast_to_unicast)
3672 return false;
3673 break;
3674 default:
3675 return false;
3676 }
3677
3678 /* multicast to unicast conversion only for some payload */
3679 ethertype = eth->h_proto;
3680 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
3681 ethertype = ethvlan->h_vlan_encapsulated_proto;
3682 switch (ethertype) {
3683 case htons(ETH_P_ARP):
3684 case htons(ETH_P_IP):
3685 case htons(ETH_P_IPV6):
3686 break;
3687 default:
3688 return false;
3689 }
3690
3691 return true;
3692}
3693
3694static void
3695ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
3696 struct sk_buff_head *queue)
3697{
3698 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3699 struct ieee80211_local *local = sdata->local;
3700 const struct ethhdr *eth = (struct ethhdr *)skb->data;
3701 struct sta_info *sta, *first = NULL;
3702 struct sk_buff *cloned_skb;
3703
3704 rcu_read_lock();
3705
3706 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3707 if (sdata != sta->sdata)
3708 /* AP-VLAN mismatch */
3709 continue;
3710 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
3711 /* do not send back to source */
3712 continue;
3713 if (!first) {
3714 first = sta;
3715 continue;
3716 }
3717 cloned_skb = skb_clone(skb, GFP_ATOMIC);
3718 if (!cloned_skb)
3719 goto multicast;
3720 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
3721 dev_kfree_skb(cloned_skb);
3722 goto multicast;
3723 }
3724 __skb_queue_tail(queue, cloned_skb);
3725 }
3726
3727 if (likely(first)) {
3728 if (unlikely(ieee80211_change_da(skb, first)))
3729 goto multicast;
3730 __skb_queue_tail(queue, skb);
3731 } else {
3732 /* no STA connected, drop */
3733 kfree_skb(skb);
3734 skb = NULL;
3735 }
3736
3737 goto out;
3738multicast:
3739 __skb_queue_purge(queue);
3740 __skb_queue_tail(queue, skb);
3741out:
3742 rcu_read_unlock();
3743}
3744
4c9451ed
JB		 3745/**
3746 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3747 * @skb: packet to be sent
3748 * @dev: incoming interface
3749 *
3750 * On failure skb will be freed.
3751 */
24d342c5
LK		 3752netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3753 struct net_device *dev)
3754{
ebceec86
MB		 3755 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
3756 struct sk_buff_head queue;
3757
3758 __skb_queue_head_init(&queue);
3759 ieee80211_convert_to_unicast(skb, dev, &queue);
3760 while ((skb = __skb_dequeue(&queue)))
3761 __ieee80211_subif_start_xmit(skb, dev, 0);
3762 } else {
3763 __ieee80211_subif_start_xmit(skb, dev, 0);
3764 }
3765
24d342c5
LK		 3766 return NETDEV_TX_OK;
3767}
e2ebc74d 3768
7528ec57
JB		 3769struct sk_buff *
3770ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3771 struct sk_buff *skb, u32 info_flags)
3772{
3773 struct ieee80211_hdr *hdr;
3774 struct ieee80211_tx_data tx = {
3775 .local = sdata->local,
3776 .sdata = sdata,
3777 };
97ffe757 3778 struct sta_info *sta;
7528ec57
JB		 3779
3780 rcu_read_lock();
3781
97ffe757
JB		 3782 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3783 kfree_skb(skb);
3784 skb = ERR_PTR(-EINVAL);
3785 goto out;
3786 }
3787
3788 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
7528ec57
JB		 3789 if (IS_ERR(skb))
3790 goto out;
3791
3792 hdr = (void *)skb->data;
3793 tx.sta = sta_info_get(sdata, hdr->addr1);
3794 tx.skb = skb;
3795
3796 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3797 rcu_read_unlock();
3798 kfree_skb(skb);
3799 return ERR_PTR(-EINVAL);
3800 }
3801
3802out:
3803 rcu_read_unlock();
3804 return skb;
3805}
3806
e2530083
JB		 3807/*
3808 * ieee80211_clear_tx_pending may not be called in a context where
3809 * it is possible that it packets could come in again.
3810 */
e2ebc74d
JB		 3811void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3812{
1f98ab7f 3813 struct sk_buff *skb;
2de8e0d9 3814 int i;
e2ebc74d 3815
1f98ab7f
FF		 3816 for (i = 0; i < local->hw.queues; i++) {
3817 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3818 ieee80211_free_txskb(&local->hw, skb);
3819 }
e2ebc74d
JB		 3820}
3821
7bb45683
JB		 3822/*
3823 * Returns false if the frame couldn't be transmitted but was queued instead,
3824 * which in this case means re-queued -- take as an indication to stop sending
3825 * more pending frames.
3826 */
cd8ffc80
JB		 3827static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3828 struct sk_buff *skb)
3829{
3830 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3831 struct ieee80211_sub_if_data *sdata;
3832 struct sta_info *sta;
3833 struct ieee80211_hdr *hdr;
7bb45683 3834 bool result;
55de908a 3835 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 3836
5061b0c2 3837 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 3838
3839 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 3840 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3841 if (unlikely(!chanctx_conf)) {
3842 dev_kfree_skb(skb);
3843 return true;
3844 }
73c4e195 3845 info->band = chanctx_conf->def.chan->band;
7c10770f 3846 result = ieee80211_tx(sdata, NULL, skb, true);
cd8ffc80 3847 } else {
252b86c4
JB		 3848 struct sk_buff_head skbs;
3849
3850 __skb_queue_head_init(&skbs);
3851 __skb_queue_tail(&skbs, skb);
3852
cd8ffc80 3853 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 3854 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 3855
74e4dbfd 3856 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 3857 }
3858
cd8ffc80
JB		 3859 return result;
3860}
3861
e2530083 3862/*
3b8d81e0 3863 * Transmit all pending packets. Called from tasklet.
e2530083 3864 */
e2ebc74d
JB		 3865void ieee80211_tx_pending(unsigned long data)
3866{
3867 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 3868 unsigned long flags;
cd8ffc80 3869 int i;
3b8d81e0 3870 bool txok;
e2ebc74d 3871
f0e72851 3872 rcu_read_lock();
e2530083 3873
3b8d81e0 3874 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 3875 for (i = 0; i < local->hw.queues; i++) {
3876 /*
3877 * If queue is stopped by something other than due to pending
3878 * frames, or we have no pending frames, proceed to next queue.
3879 */
3b8d81e0 3880 if (local->queue_stop_reasons[i] ||
2a577d98 3881 skb_queue_empty(&local->pending[i]))
e2ebc74d 3882 continue;
e2530083 3883
2a577d98 3884 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 3885 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 3886 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 3887
a7bc376c 3888 if (WARN_ON(!info->control.vif)) {
c3e7724b 3889 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 3890 continue;
3891 }
3892
3b8d81e0
JB		 3893 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3894 flags);
3895
3896 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 3897 spin_lock_irqsave(&local->queue_stop_reason_lock,
3898 flags);
3899 if (!txok)
2a577d98 3900 break;
e2ebc74d 3901 }
7236fe29
JB		 3902
3903 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 3904 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 3905 }
3b8d81e0 3906 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 3907
f0e72851 3908 rcu_read_unlock();
e2ebc74d
JB		 3909}
3910
3911/* functions for drivers to get certain frames */
3912
eac70c13 3913static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3914 struct ps_data *ps, struct sk_buff *skb,
3915 bool is_template)
e2ebc74d
JB		 3916{
3917 u8 *pos, *tim;
3918 int aid0 = 0;
3919 int i, have_bits = 0, n1, n2;
3920
3921 /* Generate bitmap for TIM only if there are any STAs in power save
3922 * mode. */
d012a605 3923 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 3924 /* in the hope that this is faster than
3925 * checking byte-for-byte */
f359d3fe 3926 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 3927 IEEE80211_MAX_AID+1);
6ec8c332
AO		 3928 if (!is_template) {
3929 if (ps->dtim_count == 0)
3930 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3931 else
3932 ps->dtim_count--;
3933 }
e2ebc74d 3934
4df864c1 3935 tim = pos = skb_put(skb, 6);
e2ebc74d
JB		 3936 *pos++ = WLAN_EID_TIM;
3937 *pos++ = 4;
d012a605 3938 *pos++ = ps->dtim_count;
8860020e 3939 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 3940
d012a605 3941 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 3942 aid0 = 1;
3943
d012a605 3944 ps->dtim_bc_mc = aid0 == 1;
512119b3 3945
e2ebc74d
JB		 3946 if (have_bits) {
3947 /* Find largest even number N1 so that bits numbered 1 through
3948 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3949 * (N2 + 1) x 8 through 2007 are 0. */
3950 n1 = 0;
3951 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 3952 if (ps->tim[i]) {
e2ebc74d
JB		 3953 n1 = i & 0xfe;
3954 break;
3955 }
3956 }
3957 n2 = n1;
3958 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 3959 if (ps->tim[i]) {
e2ebc74d
JB		 3960 n2 = i;
3961 break;
3962 }
3963 }
3964
3965 /* Bitmap control */
3966 *pos++ = n1 | aid0;
3967 /* Part Virt Bitmap */
5220da39 3968 skb_put(skb, n2 - n1);
d012a605 3969 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 3970
3971 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 3972 } else {
3973 *pos++ = aid0; /* Bitmap control */
3974 *pos++ = 0; /* Part Virt Bitmap */
3975 }
e2ebc74d
JB		 3976}
3977
eac70c13 3978static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3979 struct ps_data *ps, struct sk_buff *skb,
3980 bool is_template)
eac70c13
MP		 3981{
3982 struct ieee80211_local *local = sdata->local;
3983
3984 /*
3985 * Not very nice, but we want to allow the driver to call
3986 * ieee80211_beacon_get() as a response to the set_tim()
3987 * callback. That, however, is already invoked under the
3988 * sta_lock to guarantee consistent and race-free update
3989 * of the tim bitmap in mac80211 and the driver.
3990 */
3991 if (local->tim_in_locked_section) {
6ec8c332 3992 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 3993 } else {
1b91731d 3994 spin_lock_bh(&local->tim_lock);
6ec8c332 3995 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 3996 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 3997 }
3998
3999 return 0;
4000}
4001
1af586c9
AO		 4002static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
4003 struct beacon_data *beacon)
73da7d5b
SW		 4004{
4005 struct probe_resp *resp;
cd7760e6
SW		 4006 u8 *beacon_data;
4007 size_t beacon_data_len;
0d06d9ba 4008 int i;
af296bdb 4009 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 4010
4011 switch (sdata->vif.type) {
4012 case NL80211_IFTYPE_AP:
4013 beacon_data = beacon->tail;
4014 beacon_data_len = beacon->tail_len;
4015 break;
4016 case NL80211_IFTYPE_ADHOC:
4017 beacon_data = beacon->head;
4018 beacon_data_len = beacon->head_len;
4019 break;
b8456a14
CYY		 4020 case NL80211_IFTYPE_MESH_POINT:
4021 beacon_data = beacon->head;
4022 beacon_data_len = beacon->head_len;
4023 break;
cd7760e6
SW		 4024 default:
4025 return;
4026 }
73da7d5b 4027
af296bdb 4028 rcu_read_lock();
0d06d9ba 4029 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 4030 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 4031
af296bdb
MK		 4032 if (beacon->csa_counter_offsets[i]) {
4033 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
4034 beacon_data_len)) {
0d06d9ba
AO		 4035 rcu_read_unlock();
4036 return;
4037 }
af296bdb
MK		 4038
4039 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 4040 }
af296bdb
MK		 4041
4042 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
4043 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 4044 }
af296bdb 4045 rcu_read_unlock();
1af586c9
AO		 4046}
4047
e996ec2a
WD		 4048static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
4049{
4050 beacon->csa_current_counter--;
4051
4052 /* the counter should never reach 0 */
4053 WARN_ON_ONCE(!beacon->csa_current_counter);
4054
4055 return beacon->csa_current_counter;
4056}
4057
1af586c9
AO		 4058u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
4059{
4060 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 4061 struct beacon_data *beacon = NULL;
4062 u8 count = 0;
0d06d9ba 4063
af296bdb
MK		 4064 rcu_read_lock();
4065
4066 if (sdata->vif.type == NL80211_IFTYPE_AP)
4067 beacon = rcu_dereference(sdata->u.ap.beacon);
4068 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4069 beacon = rcu_dereference(sdata->u.ibss.presp);
4070 else if (ieee80211_vif_is_mesh(&sdata->vif))
4071 beacon = rcu_dereference(sdata->u.mesh.beacon);
4072
4073 if (!beacon)
4074 goto unlock;
4075
e996ec2a 4076 count = __ieee80211_csa_update_counter(beacon);
1af586c9 4077
af296bdb
MK		 4078unlock:
4079 rcu_read_unlock();
4080 return count;
73da7d5b 4081}
1af586c9 4082EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b
SW		 4083
4084bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4085{
4086 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4087 struct beacon_data *beacon = NULL;
4088 u8 *beacon_data;
4089 size_t beacon_data_len;
73da7d5b
SW		 4090 int ret = false;
4091
4092 if (!ieee80211_sdata_running(sdata))
4093 return false;
4094
4095 rcu_read_lock();
4096 if (vif->type == NL80211_IFTYPE_AP) {
4097 struct ieee80211_if_ap *ap = &sdata->u.ap;
4098
4099 beacon = rcu_dereference(ap->beacon);
4100 if (WARN_ON(!beacon || !beacon->tail))
4101 goto out;
4102 beacon_data = beacon->tail;
4103 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 4104 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4105 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4106
4107 beacon = rcu_dereference(ifibss->presp);
4108 if (!beacon)
4109 goto out;
4110
b8456a14
CYY		 4111 beacon_data = beacon->head;
4112 beacon_data_len = beacon->head_len;
4113 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4114 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4115
4116 beacon = rcu_dereference(ifmsh->beacon);
4117 if (!beacon)
4118 goto out;
4119
cd7760e6
SW		 4120 beacon_data = beacon->head;
4121 beacon_data_len = beacon->head_len;
73da7d5b
SW		 4122 } else {
4123 WARN_ON(1);
4124 goto out;
4125 }
4126
10d78f27
MK		 4127 if (!beacon->csa_counter_offsets[0])
4128 goto out;
4129
af296bdb 4130 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 4131 goto out;
4132
af296bdb 4133 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 4134 ret = true;
4135 out:
4136 rcu_read_unlock();
4137
4138 return ret;
4139}
4140EXPORT_SYMBOL(ieee80211_csa_is_complete);
4141
6ec8c332
AO		 4142static struct sk_buff *
4143__ieee80211_beacon_get(struct ieee80211_hw *hw,
4144 struct ieee80211_vif *vif,
4145 struct ieee80211_mutable_offsets *offs,
4146 bool is_template)
e2ebc74d
JB		 4147{
4148 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 4149 struct beacon_data *beacon = NULL;
9d139c81 4150 struct sk_buff *skb = NULL;
e039fa4a 4151 struct ieee80211_tx_info *info;
e2ebc74d 4152 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 4153 enum nl80211_band band;
e00cfce0 4154 struct ieee80211_tx_rate_control txrc;
55de908a 4155 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 4156 int csa_off_base = 0;
8318d78a 4157
5dfdaf58 4158 rcu_read_lock();
e2ebc74d 4159
32bfd35d 4160 sdata = vif_to_sdata(vif);
55de908a 4161 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 4162
55de908a 4163 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 4164 goto out;
4165
6ec8c332
AO		 4166 if (offs)
4167 memset(offs, 0, sizeof(*offs));
eddcbb94 4168
05c914fe 4169 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 4170 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 4171
af296bdb 4172 beacon = rcu_dereference(ap->beacon);
3ad97fbc 4173 if (beacon) {
10d78f27 4174 if (beacon->csa_counter_offsets[0]) {
1af586c9 4175 if (!is_template)
e996ec2a 4176 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 4177
4178 ieee80211_set_csa(sdata, beacon);
4179 }
73da7d5b 4180
902acc78
JB		 4181 /*
4182 * headroom, head length,
4183 * tail length and maximum TIM length
4184 */
4185 skb = dev_alloc_skb(local->tx_headroom +
4186 beacon->head_len +
70dabeb7
FF		 4187 beacon->tail_len + 256 +
4188 local->hw.extra_beacon_tailroom);
902acc78
JB		 4189 if (!skb)
4190 goto out;
33b64eb2 4191
902acc78 4192 skb_reserve(skb, local->tx_headroom);
59ae1d12 4193 skb_put_data(skb, beacon->head, beacon->head_len);
33b64eb2 4194
6ec8c332
AO		 4195 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4196 is_template);
33b64eb2 4197
6ec8c332
AO		 4198 if (offs) {
4199 offs->tim_offset = beacon->head_len;
4200 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 4201
4202 /* for AP the csa offsets are from tail */
4203 csa_off_base = skb->len;
6ec8c332 4204 }
eddcbb94 4205
902acc78 4206 if (beacon->tail)
59ae1d12
JB		 4207 skb_put_data(skb, beacon->tail,
4208 beacon->tail_len);
9d139c81
JB		 4209 } else
4210 goto out;
05c914fe 4211 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 4212 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 4213 struct ieee80211_hdr *hdr;
33b64eb2 4214
af296bdb
MK		 4215 beacon = rcu_dereference(ifibss->presp);
4216 if (!beacon)
9d139c81
JB		 4217 goto out;
4218
10d78f27 4219 if (beacon->csa_counter_offsets[0]) {
1af586c9 4220 if (!is_template)
e996ec2a 4221 __ieee80211_csa_update_counter(beacon);
cd7760e6 4222
af296bdb 4223 ieee80211_set_csa(sdata, beacon);
1af586c9 4224 }
cd7760e6 4225
af296bdb 4226 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 4227 local->hw.extra_beacon_tailroom);
9d139c81
JB		 4228 if (!skb)
4229 goto out;
c3ffeab4 4230 skb_reserve(skb, local->tx_headroom);
59ae1d12 4231 skb_put_data(skb, beacon->head, beacon->head_len);
9d139c81
JB		 4232
4233 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 4234 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4235 IEEE80211_STYPE_BEACON);
902acc78 4236 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 4237 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 4238
af296bdb
MK		 4239 beacon = rcu_dereference(ifmsh->beacon);
4240 if (!beacon)
ac1bd846 4241 goto out;
ac1bd846 4242
10d78f27 4243 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 4244 if (!is_template)
4245 /* TODO: For mesh csa_counter is in TU, so
4246 * decrementing it by one isn't correct, but
4247 * for now we leave it consistent with overall
4248 * mac80211's behavior.
4249 */
e996ec2a 4250 __ieee80211_csa_update_counter(beacon);
1af586c9 4251
af296bdb 4252 ieee80211_set_csa(sdata, beacon);
1af586c9 4253 }
b8456a14 4254
dbf498fb 4255 if (ifmsh->sync_ops)
445cd452 4256 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
dbf498fb 4257
3b69a9c5 4258 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 4259 beacon->head_len +
3f52b7e3 4260 256 + /* TIM IE */
af296bdb 4261 beacon->tail_len +
70dabeb7 4262 local->hw.extra_beacon_tailroom);
902acc78
JB		 4263 if (!skb)
4264 goto out;
2b5e1967 4265 skb_reserve(skb, local->tx_headroom);
59ae1d12 4266 skb_put_data(skb, beacon->head, beacon->head_len);
6ec8c332
AO		 4267 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4268
4269 if (offs) {
af296bdb
MK		 4270 offs->tim_offset = beacon->head_len;
4271 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 4272 }
4273
59ae1d12 4274 skb_put_data(skb, beacon->tail, beacon->tail_len);
9d139c81
JB		 4275 } else {
4276 WARN_ON(1);
5dfdaf58 4277 goto out;
e2ebc74d
JB		 4278 }
4279
1af586c9 4280 /* CSA offsets */
af296bdb 4281 if (offs && beacon) {
1af586c9
AO		 4282 int i;
4283
4284 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 4285 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 4286
4287 if (!csa_off)
4288 continue;
4289
4290 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4291 }
4292 }
4293
4bf88530 4294 band = chanctx_conf->def.chan->band;
55de908a 4295
e039fa4a
JB		 4296 info = IEEE80211_SKB_CB(skb);
4297
3b8d81e0 4298 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 4299 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 4300 info->band = band;
e00cfce0
JM		 4301
4302 memset(&txrc, 0, sizeof(txrc));
4303 txrc.hw = hw;
e31583cd 4304 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 4305 txrc.bss_conf = &sdata->vif.bss_conf;
4306 txrc.skb = skb;
4307 txrc.reported_rate.idx = -1;
37eb0b16 4308 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
8f0729b1 4309 txrc.bss = true;
e00cfce0 4310 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 4311
4312 info->control.vif = vif;
f591fa5d 4313
a472e71b
JL		 4314 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4315 IEEE80211_TX_CTL_ASSIGN_SEQ |
4316 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 4317 out:
5dfdaf58 4318 rcu_read_unlock();
e2ebc74d 4319 return skb;
6ec8c332
AO		 4320
4321}
4322
4323struct sk_buff *
4324ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4325 struct ieee80211_vif *vif,
4326 struct ieee80211_mutable_offsets *offs)
4327{
4328 return __ieee80211_beacon_get(hw, vif, offs, true);
4329}
4330EXPORT_SYMBOL(ieee80211_beacon_get_template);
4331
4332struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4333 struct ieee80211_vif *vif,
4334 u16 *tim_offset, u16 *tim_length)
4335{
4336 struct ieee80211_mutable_offsets offs = {};
4337 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 4338 struct sk_buff *copy;
4339 struct ieee80211_supported_band *sband;
4340 int shift;
4341
4342 if (!bcn)
4343 return bcn;
6ec8c332
AO		 4344
4345 if (tim_offset)
4346 *tim_offset = offs.tim_offset;
4347
4348 if (tim_length)
4349 *tim_length = offs.tim_length;
4350
35afa588
HS		 4351 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4352 !hw_to_local(hw)->monitors)
4353 return bcn;
4354
4355 /* send a copy to monitor interfaces */
4356 copy = skb_copy(bcn, GFP_ATOMIC);
4357 if (!copy)
4358 return bcn;
4359
4360 shift = ieee80211_vif_get_shift(vif);
21a8e9dd
MSS		 4361 sband = ieee80211_get_sband(vif_to_sdata(vif));
4362 if (!sband)
4363 return bcn;
4364
35afa588
HS		 4365 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4366
6ec8c332 4367 return bcn;
e2ebc74d 4368}
eddcbb94 4369EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4370
02945821
AN		 4371struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4372 struct ieee80211_vif *vif)
4373{
4374 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4375 struct sk_buff *skb = NULL;
4376 struct probe_resp *presp = NULL;
02945821
AN		 4377 struct ieee80211_hdr *hdr;
4378 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4379
4380 if (sdata->vif.type != NL80211_IFTYPE_AP)
4381 return NULL;
4382
4383 rcu_read_lock();
4384
4385 ap = &sdata->u.ap;
4386 presp = rcu_dereference(ap->probe_resp);
4387 if (!presp)
4388 goto out;
4389
aa7a0080 4390 skb = dev_alloc_skb(presp->len);
02945821
AN		 4391 if (!skb)
4392 goto out;
4393
59ae1d12 4394 skb_put_data(skb, presp->data, presp->len);
aa7a0080 4395
02945821
AN		 4396 hdr = (struct ieee80211_hdr *) skb->data;
4397 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4398
4399out:
4400 rcu_read_unlock();
4401 return skb;
4402}
4403EXPORT_SYMBOL(ieee80211_proberesp_get);
4404
7044cc56
KV		 4405struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4406 struct ieee80211_vif *vif)
4407{
4408 struct ieee80211_sub_if_data *sdata;
4409 struct ieee80211_if_managed *ifmgd;
4410 struct ieee80211_pspoll *pspoll;
4411 struct ieee80211_local *local;
4412 struct sk_buff *skb;
4413
4414 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4415 return NULL;
4416
4417 sdata = vif_to_sdata(vif);
4418 ifmgd = &sdata->u.mgd;
4419 local = sdata->local;
4420
4421 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4422 if (!skb)
7044cc56 4423 return NULL;
d15b8459 4424
7044cc56
KV		 4425 skb_reserve(skb, local->hw.extra_tx_headroom);
4426
b080db58 4427 pspoll = skb_put_zero(skb, sizeof(*pspoll));
7044cc56
KV		 4428 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4429 IEEE80211_STYPE_PSPOLL);
4430 pspoll->aid = cpu_to_le16(ifmgd->aid);
4431
4432 /* aid in PS-Poll has its two MSBs each set to 1 */
4433 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4434
4435 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4436 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4437
4438 return skb;
4439}
4440EXPORT_SYMBOL(ieee80211_pspoll_get);
4441
4442struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
7b6ddeaf
JB		 4443 struct ieee80211_vif *vif,
4444 bool qos_ok)
7044cc56
KV		 4445{
4446 struct ieee80211_hdr_3addr *nullfunc;
4447 struct ieee80211_sub_if_data *sdata;
4448 struct ieee80211_if_managed *ifmgd;
4449 struct ieee80211_local *local;
4450 struct sk_buff *skb;
7b6ddeaf 4451 bool qos = false;
7044cc56
KV		 4452
4453 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4454 return NULL;
4455
4456 sdata = vif_to_sdata(vif);
4457 ifmgd = &sdata->u.mgd;
4458 local = sdata->local;
4459
7b6ddeaf
JB		 4460 if (qos_ok) {
4461 struct sta_info *sta;
4462
4463 rcu_read_lock();
4464 sta = sta_info_get(sdata, ifmgd->bssid);
4465 qos = sta && sta->sta.wme;
4466 rcu_read_unlock();
4467 }
4468
4469 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
4470 sizeof(*nullfunc) + 2);
d15b8459 4471 if (!skb)
7044cc56 4472 return NULL;
d15b8459 4473
7044cc56
KV		 4474 skb_reserve(skb, local->hw.extra_tx_headroom);
4475
b080db58 4476 nullfunc = skb_put_zero(skb, sizeof(*nullfunc));
7044cc56
KV		 4477 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4478 IEEE80211_STYPE_NULLFUNC |
4479 IEEE80211_FCTL_TODS);
7b6ddeaf
JB		 4480 if (qos) {
4481 __le16 qos = cpu_to_le16(7);
4482
4483 BUILD_BUG_ON((IEEE80211_STYPE_QOS_NULLFUNC |
4484 IEEE80211_STYPE_NULLFUNC) !=
4485 IEEE80211_STYPE_QOS_NULLFUNC);
4486 nullfunc->frame_control |=
4487 cpu_to_le16(IEEE80211_STYPE_QOS_NULLFUNC);
4488 skb->priority = 7;
4489 skb_set_queue_mapping(skb, IEEE80211_AC_VO);
4490 skb_put_data(skb, &qos, sizeof(qos));
4491 }
4492
7044cc56
KV		 4493 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4494 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4495 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4496
4497 return skb;
4498}
4499EXPORT_SYMBOL(ieee80211_nullfunc_get);
4500
05e54ea6 4501struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4502 const u8 *src_addr,
05e54ea6 4503 const u8 *ssid, size_t ssid_len,
b9a9ada1 4504 size_t tailroom)
05e54ea6 4505{
a344d677 4506 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4507 struct ieee80211_hdr_3addr *hdr;
4508 struct sk_buff *skb;
4509 size_t ie_ssid_len;
4510 u8 *pos;
4511
05e54ea6
KV		 4512 ie_ssid_len = 2 + ssid_len;
4513
4514 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4515 ie_ssid_len + tailroom);
d15b8459 4516 if (!skb)
05e54ea6 4517 return NULL;
05e54ea6
KV		 4518
4519 skb_reserve(skb, local->hw.extra_tx_headroom);
4520
b080db58 4521 hdr = skb_put_zero(skb, sizeof(*hdr));
05e54ea6
KV		 4522 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4523 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4524 eth_broadcast_addr(hdr->addr1);
a344d677 4525 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4526 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4527
4528 pos = skb_put(skb, ie_ssid_len);
4529 *pos++ = WLAN_EID_SSID;
4530 *pos++ = ssid_len;
88c868c4 4531 if (ssid_len)
05e54ea6
KV		 4532 memcpy(pos, ssid, ssid_len);
4533 pos += ssid_len;
4534
05e54ea6
KV		 4535 return skb;
4536}
4537EXPORT_SYMBOL(ieee80211_probereq_get);
4538
32bfd35d 4539void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4540 const void *frame, size_t frame_len,
e039fa4a 4541 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4542 struct ieee80211_rts *rts)
4543{
4544 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4545
065e9605
HH		 4546 rts->frame_control =
4547 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4548 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4549 frame_txctl);
e2ebc74d
JB		 4550 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4551 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4552}
4553EXPORT_SYMBOL(ieee80211_rts_get);
4554
32bfd35d 4555void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4556 const void *frame, size_t frame_len,
e039fa4a 4557 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4558 struct ieee80211_cts *cts)
4559{
4560 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4561
065e9605
HH		 4562 cts->frame_control =
4563 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4564 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4565 frame_len, frame_txctl);
e2ebc74d
JB		 4566 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4567}
4568EXPORT_SYMBOL(ieee80211_ctstoself_get);
4569
4570struct sk_buff *
32bfd35d 4571ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4572 struct ieee80211_vif *vif)
e2ebc74d
JB		 4573{
4574 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4575 struct sk_buff *skb = NULL;
5cf121c3 4576 struct ieee80211_tx_data tx;
e2ebc74d 4577 struct ieee80211_sub_if_data *sdata;
d012a605 4578 struct ps_data *ps;
e039fa4a 4579 struct ieee80211_tx_info *info;
55de908a 4580 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4581
32bfd35d 4582 sdata = vif_to_sdata(vif);
5dfdaf58 4583
5dfdaf58 4584 rcu_read_lock();
55de908a 4585 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4586
d012a605
MP		 4587 if (!chanctx_conf)
4588 goto out;
4589
4590 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4591 struct beacon_data *beacon =
4592 rcu_dereference(sdata->u.ap.beacon);
4593
4594 if (!beacon || !beacon->head)
4595 goto out;
4596
4597 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4598 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4599 ps = &sdata->u.mesh.ps;
d012a605 4600 } else {
747cf5e9 4601 goto out;
d012a605 4602 }
5dfdaf58 4603
d012a605 4604 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4605 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4606
e2ebc74d 4607 while (1) {
d012a605 4608 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4609 if (!skb)
747cf5e9 4610 goto out;
e2ebc74d
JB		 4611 local->total_ps_buffered--;
4612
d012a605 4613 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4614 struct ieee80211_hdr *hdr =
4615 (struct ieee80211_hdr *) skb->data;
4616 /* more buffered multicast/broadcast frames ==> set
4617 * MoreData flag in IEEE 802.11 header to inform PS
4618 * STAs */
4619 hdr->frame_control |=
4620 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4621 }
4622
112c44b2 4623 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4624 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4625 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4626 break;
6b07d9ca 4627 ieee80211_free_txskb(hw, skb);
e2ebc74d 4628 }
e039fa4a
JB		 4629
4630 info = IEEE80211_SKB_CB(skb);
4631
5cf121c3 4632 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4633 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4634
97b045d6 4635 if (invoke_tx_handlers(&tx))
e2ebc74d 4636 skb = NULL;
97b045d6 4637 out:
d0709a65 4638 rcu_read_unlock();
e2ebc74d
JB		 4639
4640 return skb;
4641}
4642EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 4643
b6da911b
LK		 4644int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4645{
4646 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4647 struct ieee80211_sub_if_data *sdata = sta->sdata;
4648 struct ieee80211_local *local = sdata->local;
4649 int ret;
4650 u32 queues;
4651
4652 lockdep_assert_held(&local->sta_mtx);
4653
4654 /* only some cases are supported right now */
4655 switch (sdata->vif.type) {
4656 case NL80211_IFTYPE_STATION:
4657 case NL80211_IFTYPE_AP:
4658 case NL80211_IFTYPE_AP_VLAN:
4659 break;
4660 default:
4661 WARN_ON(1);
4662 return -EINVAL;
4663 }
4664
4665 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4666 return -EINVAL;
4667
4668 if (sta->reserved_tid == tid) {
4669 ret = 0;
4670 goto out;
4671 }
4672
4673 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4674 sdata_err(sdata, "TID reservation already active\n");
4675 ret = -EALREADY;
4676 goto out;
4677 }
4678
4679 ieee80211_stop_vif_queues(sdata->local, sdata,
4680 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4681
4682 synchronize_net();
4683
4684 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 4685 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 4686 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4687 __ieee80211_stop_tx_ba_session(sta, tid,
4688 AGG_STOP_LOCAL_REQUEST);
4689 }
4690
4691 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 4692 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 4693
4694 sta->reserved_tid = tid;
4695
4696 ieee80211_wake_vif_queues(local, sdata,
4697 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4698
30686bf7 4699 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 4700 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4701
4702 ret = 0;
4703 out:
4704 return ret;
4705}
4706EXPORT_SYMBOL(ieee80211_reserve_tid);
4707
4708void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4709{
4710 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4711 struct ieee80211_sub_if_data *sdata = sta->sdata;
4712
4713 lockdep_assert_held(&sdata->local->sta_mtx);
4714
4715 /* only some cases are supported right now */
4716 switch (sdata->vif.type) {
4717 case NL80211_IFTYPE_STATION:
4718 case NL80211_IFTYPE_AP:
4719 case NL80211_IFTYPE_AP_VLAN:
4720 break;
4721 default:
4722 WARN_ON(1);
4723 return;
4724 }
4725
4726 if (tid != sta->reserved_tid) {
4727 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4728 return;
4729 }
4730
4731 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4732}
4733EXPORT_SYMBOL(ieee80211_unreserve_tid);
4734
55de908a
JB		 4735void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4736 struct sk_buff *skb, int tid,
57fbcce3 4737 enum nl80211_band band)
3b8d81e0 4738{
731977e9 4739 int ac = ieee80211_ac_from_tid(tid);
3a25a8c8 4740
d57a544d 4741 skb_reset_mac_header(skb);
3a25a8c8 4742 skb_set_queue_mapping(skb, ac);
cf6bb79a 4743 skb->priority = tid;
cf0277e7 4744
89afe614
JB		 4745 skb->dev = sdata->dev;
4746
3d34deb6
JB		 4747 /*
4748 * The other path calling ieee80211_xmit is from the tasklet,
4749 * and while we can handle concurrent transmissions locking
4750 * requirements are that we do not come into tx with bhs on.
4751 */
4752 local_bh_disable();
73c4e195 4753 IEEE80211_SKB_CB(skb)->band = band;
7c10770f 4754 ieee80211_xmit(sdata, NULL, skb);
3d34deb6 4755 local_bh_enable();
3b8d81e0 4756}
Linux 6.x block layer and io_uring tree(s)