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Merge tag 'docs-4.11' of git://git.lwn.net/linux
[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];
37eb0b16
JM		 685 if (txrc.rate_idx_mask == (1 << sband->n_bitrates) - 1)
686 txrc.max_rate_idx = -1;
687 else
688 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
2ffbe6d3
FF		 689
690 if (tx->sdata->rc_has_mcs_mask[info->band])
691 txrc.rate_idx_mcs_mask =
692 tx->sdata->rc_rateidx_mcs_mask[info->band];
693
8f0729b1 694 txrc.bss = (tx->sdata->vif.type == NL80211_IFTYPE_AP ||
4bb62344 695 tx->sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
5765f9f6
BVB		 696 tx->sdata->vif.type == NL80211_IFTYPE_ADHOC ||
697 tx->sdata->vif.type == NL80211_IFTYPE_OCB);
e6a9854b
JB		 698
699 /* set up RTS protection if desired */
b9a5f8ca 700 if (len > tx->local->hw.wiphy->rts_threshold) {
0d528d85 701 txrc.rts = true;
e2ebc74d 702 }
e2ebc74d 703
0d528d85 704 info->control.use_rts = txrc.rts;
991fec09
FF		 705 info->control.use_cts_prot = tx->sdata->vif.bss_conf.use_cts_prot;
706
e6a9854b
JB		 707 /*
708 * Use short preamble if the BSS can handle it, but not for
709 * management frames unless we know the receiver can handle
710 * that -- the management frame might be to a station that
711 * just wants a probe response.
712 */
713 if (tx->sdata->vif.bss_conf.use_short_preamble &&
714 (ieee80211_is_data(hdr->frame_control) ||
c2c98fde 715 (tx->sta && test_sta_flag(tx->sta, WLAN_STA_SHORT_PREAMBLE))))
0d528d85
FF		 716 txrc.short_preamble = true;
717
718 info->control.short_preamble = txrc.short_preamble;
e2ebc74d 719
dfdfc2be
SE		 720 /* don't ask rate control when rate already injected via radiotap */
721 if (info->control.flags & IEEE80211_TX_CTRL_RATE_INJECT)
722 return TX_CONTINUE;
723
c2c98fde
JB		 724 if (tx->sta)
725 assoc = test_sta_flag(tx->sta, WLAN_STA_ASSOC);
b770b43e
LR		 726
727 /*
728 * Lets not bother rate control if we're associated and cannot
729 * talk to the sta. This should not happen.
730 */
c2c98fde 731 if (WARN(test_bit(SCAN_SW_SCANNING, &tx->local->scanning) && assoc &&
b770b43e
LR		 732 !rate_usable_index_exists(sband, &tx->sta->sta),
733 "%s: Dropped data frame as no usable bitrate found while "
734 "scanning and associated. Target station: "
735 "%pM on %d GHz band\n",
47846c9b 736 tx->sdata->name, hdr->addr1,
2d56577b 737 info->band ? 5 : 2))
b770b43e 738 return TX_DROP;
2e92e6f2 739
b770b43e
LR		 740 /*
741 * If we're associated with the sta at this point we know we can at
742 * least send the frame at the lowest bit rate.
743 */
e6a9854b
JB		 744 rate_control_get_rate(tx->sdata, tx->sta, &txrc);
745
0d528d85
FF		 746 if (tx->sta && !info->control.skip_table)
747 ratetbl = rcu_dereference(tx->sta->sta.rates);
748
749 if (unlikely(info->control.rates[0].idx < 0)) {
750 if (ratetbl) {
751 struct ieee80211_tx_rate rate = {
752 .idx = ratetbl->rate[0].idx,
753 .flags = ratetbl->rate[0].flags,
754 .count = ratetbl->rate[0].count
755 };
756
757 if (ratetbl->rate[0].idx < 0)
758 return TX_DROP;
759
760 tx->rate = rate;
761 } else {
762 return TX_DROP;
763 }
764 } else {
765 tx->rate = info->control.rates[0];
766 }
e6a9854b 767
c1ce5a74 768 if (txrc.reported_rate.idx < 0) {
0d528d85 769 txrc.reported_rate = tx->rate;
c1ce5a74 770 if (tx->sta && ieee80211_is_data(hdr->frame_control))
e5a9f8d0 771 tx->sta->tx_stats.last_rate = txrc.reported_rate;
c1ce5a74 772 } else if (tx->sta)
e5a9f8d0 773 tx->sta->tx_stats.last_rate = txrc.reported_rate;
e039fa4a 774
0d528d85
FF		 775 if (ratetbl)
776 return TX_CONTINUE;
777
e6a9854b
JB		 778 if (unlikely(!info->control.rates[0].count))
779 info->control.rates[0].count = 1;
e2ebc74d 780
9955151d
GS		 781 if (WARN_ON_ONCE((info->control.rates[0].count > 1) &&
782 (info->flags & IEEE80211_TX_CTL_NO_ACK)))
783 info->control.rates[0].count = 1;
784
e6a9854b
JB		 785 return TX_CONTINUE;
786}
787
ba8c3d6f
FF		 788static __le16 ieee80211_tx_next_seq(struct sta_info *sta, int tid)
789{
790 u16 *seq = &sta->tid_seq[tid];
791 __le16 ret = cpu_to_le16(*seq);
792
793 /* Increase the sequence number. */
794 *seq = (*seq + 0x10) & IEEE80211_SCTL_SEQ;
795
796 return ret;
797}
798
f591fa5d
JB		 799static ieee80211_tx_result debug_noinline
800ieee80211_tx_h_sequence(struct ieee80211_tx_data *tx)
801{
802 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
803 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data;
f591fa5d
JB		 804 u8 *qc;
805 int tid;
806
25d834e1
JB		 807 /*
808 * Packet injection may want to control the sequence
809 * number, if we have no matching interface then we
810 * neither assign one ourselves nor ask the driver to.
811 */
5061b0c2 812 if (unlikely(info->control.vif->type == NL80211_IFTYPE_MONITOR))
25d834e1
JB		 813 return TX_CONTINUE;
814
f591fa5d
JB		 815 if (unlikely(ieee80211_is_ctl(hdr->frame_control)))
816 return TX_CONTINUE;
817
818 if (ieee80211_hdrlen(hdr->frame_control) < 24)
819 return TX_CONTINUE;
820
49a59543
JB		 821 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
822 return TX_CONTINUE;
823
94778280
JB		 824 /*
825 * Anything but QoS data that has a sequence number field
826 * (is long enough) gets a sequence number from the global
c4c205f3
BC		 827 * counter. QoS data frames with a multicast destination
828 * also use the global counter (802.11-2012 9.3.2.10).
94778280 829 */
c4c205f3
BC		 830 if (!ieee80211_is_data_qos(hdr->frame_control) ||
831 is_multicast_ether_addr(hdr->addr1)) {
94778280 832 /* driver should assign sequence number */
f591fa5d 833 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
94778280
JB		 834 /* for pure STA mode without beacons, we can do it */
835 hdr->seq_ctrl = cpu_to_le16(tx->sdata->sequence_number);
836 tx->sdata->sequence_number += 0x10;
79c892b8 837 if (tx->sta)
e5a9f8d0 838 tx->sta->tx_stats.msdu[IEEE80211_NUM_TIDS]++;
f591fa5d
JB		 839 return TX_CONTINUE;
840 }
841
842 /*
843 * This should be true for injected/management frames only, for
844 * management frames we have set the IEEE80211_TX_CTL_ASSIGN_SEQ
845 * above since they are not QoS-data frames.
846 */
847 if (!tx->sta)
848 return TX_CONTINUE;
849
850 /* include per-STA, per-TID sequence counter */
851
852 qc = ieee80211_get_qos_ctl(hdr);
853 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
e5a9f8d0 854 tx->sta->tx_stats.msdu[tid]++;
f591fa5d 855
bb42f2d1 856 hdr->seq_ctrl = ieee80211_tx_next_seq(tx->sta, tid);
f591fa5d
JB		 857
858 return TX_CONTINUE;
859}
860
252b86c4 861static int ieee80211_fragment(struct ieee80211_tx_data *tx,
2de8e0d9
JB		 862 struct sk_buff *skb, int hdrlen,
863 int frag_threshold)
864{
252b86c4 865 struct ieee80211_local *local = tx->local;
a1a3fcec 866 struct ieee80211_tx_info *info;
252b86c4 867 struct sk_buff *tmp;
2de8e0d9
JB		 868 int per_fragm = frag_threshold - hdrlen - FCS_LEN;
869 int pos = hdrlen + per_fragm;
870 int rem = skb->len - hdrlen - per_fragm;
871
872 if (WARN_ON(rem < 0))
873 return -EINVAL;
874
252b86c4
JB		 875 /* first fragment was already added to queue by caller */
876
2de8e0d9
JB		 877 while (rem) {
878 int fraglen = per_fragm;
879
880 if (fraglen > rem)
881 fraglen = rem;
882 rem -= fraglen;
883 tmp = dev_alloc_skb(local->tx_headroom +
884 frag_threshold +
2475b1cc 885 tx->sdata->encrypt_headroom +
2de8e0d9
JB		 886 IEEE80211_ENCRYPT_TAILROOM);
887 if (!tmp)
888 return -ENOMEM;
252b86c4
JB		 889
890 __skb_queue_tail(&tx->skbs, tmp);
891
2475b1cc
MS		 892 skb_reserve(tmp,
893 local->tx_headroom + tx->sdata->encrypt_headroom);
894
2de8e0d9
JB		 895 /* copy control information */
896 memcpy(tmp->cb, skb->cb, sizeof(tmp->cb));
a1a3fcec
JB		 897
898 info = IEEE80211_SKB_CB(tmp);
899 info->flags &= ~(IEEE80211_TX_CTL_CLEAR_PS_FILT |
900 IEEE80211_TX_CTL_FIRST_FRAGMENT);
901
902 if (rem)
903 info->flags |= IEEE80211_TX_CTL_MORE_FRAMES;
904
2de8e0d9
JB		 905 skb_copy_queue_mapping(tmp, skb);
906 tmp->priority = skb->priority;
2de8e0d9 907 tmp->dev = skb->dev;
2de8e0d9
JB		 908
909 /* copy header and data */
910 memcpy(skb_put(tmp, hdrlen), skb->data, hdrlen);
911 memcpy(skb_put(tmp, fraglen), skb->data + pos, fraglen);
912
913 pos += fraglen;
914 }
915
252b86c4 916 /* adjust first fragment's length */
338f977f 917 skb_trim(skb, hdrlen + per_fragm);
2de8e0d9
JB		 918 return 0;
919}
920
d9e8a70f 921static ieee80211_tx_result debug_noinline
e2454948
JB		 922ieee80211_tx_h_fragment(struct ieee80211_tx_data *tx)
923{
2de8e0d9
JB		 924 struct sk_buff *skb = tx->skb;
925 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
926 struct ieee80211_hdr *hdr = (void *)skb->data;
b9a5f8ca 927 int frag_threshold = tx->local->hw.wiphy->frag_threshold;
2de8e0d9
JB		 928 int hdrlen;
929 int fragnum;
e2454948 930
252b86c4
JB		 931 /* no matter what happens, tx->skb moves to tx->skbs */
932 __skb_queue_tail(&tx->skbs, skb);
933 tx->skb = NULL;
934
a26eb27a
JB		 935 if (info->flags & IEEE80211_TX_CTL_DONTFRAG)
936 return TX_CONTINUE;
937
f3fe4e93 938 if (ieee80211_hw_check(&tx->local->hw, SUPPORTS_TX_FRAG))
e2454948
JB		 939 return TX_CONTINUE;
940
eefce91a
JB		 941 /*
942 * Warn when submitting a fragmented A-MPDU frame and drop it.
3b8d81e0 943 * This scenario is handled in ieee80211_tx_prepare but extra
8d5e0d58 944 * caution taken here as fragmented ampdu may cause Tx stop.
eefce91a 945 */
8b30b1fe 946 if (WARN_ON(info->flags & IEEE80211_TX_CTL_AMPDU))
eefce91a
JB		 947 return TX_DROP;
948
065e9605 949 hdrlen = ieee80211_hdrlen(hdr->frame_control);
e2454948 950
a26eb27a 951 /* internal error, why isn't DONTFRAG set? */
8ccd8f21 952 if (WARN_ON(skb->len + FCS_LEN <= frag_threshold))
2de8e0d9 953 return TX_DROP;
e6a9854b 954
2de8e0d9
JB		 955 /*
956 * Now fragment the frame. This will allocate all the fragments and
957 * chain them (using skb as the first fragment) to skb->next.
958 * During transmission, we will remove the successfully transmitted
959 * fragments from this list. When the low-level driver rejects one
960 * of the fragments then we will simply pretend to accept the skb
961 * but store it away as pending.
962 */
252b86c4 963 if (ieee80211_fragment(tx, skb, hdrlen, frag_threshold))
2de8e0d9 964 return TX_DROP;
e6a9854b 965
2de8e0d9
JB		 966 /* update duration/seq/flags of fragments */
967 fragnum = 0;
252b86c4
JB		 968
969 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 970 const __le16 morefrags = cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
e6a9854b 971
2de8e0d9
JB		 972 hdr = (void *)skb->data;
973 info = IEEE80211_SKB_CB(skb);
e6a9854b 974
252b86c4 975 if (!skb_queue_is_last(&tx->skbs, skb)) {
2de8e0d9 976 hdr->frame_control |= morefrags;
e6a9854b
JB		 977 /*
978 * No multi-rate retries for fragmented frames, that
979 * would completely throw off the NAV at other STAs.
980 */
981 info->control.rates[1].idx = -1;
982 info->control.rates[2].idx = -1;
983 info->control.rates[3].idx = -1;
e3e1a0bc 984 BUILD_BUG_ON(IEEE80211_TX_MAX_RATES != 4);
e6a9854b 985 info->flags &= ~IEEE80211_TX_CTL_RATE_CTRL_PROBE;
2de8e0d9
JB		 986 } else {
987 hdr->frame_control &= ~morefrags;
e6a9854b 988 }
2de8e0d9
JB		 989 hdr->seq_ctrl |= cpu_to_le16(fragnum & IEEE80211_SCTL_FRAG);
990 fragnum++;
252b86c4 991 }
e2ebc74d 992
9ae54c84 993 return TX_CONTINUE;
e2ebc74d
JB		 994}
995
feff1f2f
JB		 996static ieee80211_tx_result debug_noinline
997ieee80211_tx_h_stats(struct ieee80211_tx_data *tx)
998{
252b86c4 999 struct sk_buff *skb;
560d2682 1000 int ac = -1;
feff1f2f
JB		 1001
1002 if (!tx->sta)
1003 return TX_CONTINUE;
1004
252b86c4 1005 skb_queue_walk(&tx->skbs, skb) {
560d2682 1006 ac = skb_get_queue_mapping(skb);
e5a9f8d0 1007 tx->sta->tx_stats.bytes[ac] += skb->len;
252b86c4 1008 }
560d2682 1009 if (ac >= 0)
e5a9f8d0 1010 tx->sta->tx_stats.packets[ac]++;
feff1f2f
JB		 1011
1012 return TX_CONTINUE;
1013}
1014
d9e8a70f 1015static ieee80211_tx_result debug_noinline
e2454948
JB		 1016ieee80211_tx_h_encrypt(struct ieee80211_tx_data *tx)
1017{
1018 if (!tx->key)
1019 return TX_CONTINUE;
1020
97359d12
JB		 1021 switch (tx->key->conf.cipher) {
1022 case WLAN_CIPHER_SUITE_WEP40:
1023 case WLAN_CIPHER_SUITE_WEP104:
e2454948 1024 return ieee80211_crypto_wep_encrypt(tx);
97359d12 1025 case WLAN_CIPHER_SUITE_TKIP:
e2454948 1026 return ieee80211_crypto_tkip_encrypt(tx);
97359d12 1027 case WLAN_CIPHER_SUITE_CCMP:
2b2ba0db
JM		 1028 return ieee80211_crypto_ccmp_encrypt(
1029 tx, IEEE80211_CCMP_MIC_LEN);
1030 case WLAN_CIPHER_SUITE_CCMP_256:
1031 return ieee80211_crypto_ccmp_encrypt(
1032 tx, IEEE80211_CCMP_256_MIC_LEN);
97359d12 1033 case WLAN_CIPHER_SUITE_AES_CMAC:
3cfcf6ac 1034 return ieee80211_crypto_aes_cmac_encrypt(tx);
56c52da2
JM		 1035 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
1036 return ieee80211_crypto_aes_cmac_256_encrypt(tx);
8ade538b
JM		 1037 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
1038 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
1039 return ieee80211_crypto_aes_gmac_encrypt(tx);
00b9cfa3
JM		 1040 case WLAN_CIPHER_SUITE_GCMP:
1041 case WLAN_CIPHER_SUITE_GCMP_256:
1042 return ieee80211_crypto_gcmp_encrypt(tx);
3ffc2a90 1043 default:
d32a1028 1044 return ieee80211_crypto_hw_encrypt(tx);
e2454948
JB		 1045 }
1046
e2454948
JB		 1047 return TX_DROP;
1048}
1049
d9e8a70f 1050static ieee80211_tx_result debug_noinline
03f93c3d
JB		 1051ieee80211_tx_h_calculate_duration(struct ieee80211_tx_data *tx)
1052{
252b86c4 1053 struct sk_buff *skb;
2de8e0d9
JB		 1054 struct ieee80211_hdr *hdr;
1055 int next_len;
1056 bool group_addr;
03f93c3d 1057
252b86c4 1058 skb_queue_walk(&tx->skbs, skb) {
2de8e0d9 1059 hdr = (void *) skb->data;
7e0aae47
JM		 1060 if (unlikely(ieee80211_is_pspoll(hdr->frame_control)))
1061 break; /* must not overwrite AID */
252b86c4
JB		 1062 if (!skb_queue_is_last(&tx->skbs, skb)) {
1063 struct sk_buff *next = skb_queue_next(&tx->skbs, skb);
1064 next_len = next->len;
1065 } else
1066 next_len = 0;
2de8e0d9 1067 group_addr = is_multicast_ether_addr(hdr->addr1);
03f93c3d 1068
2de8e0d9 1069 hdr->duration_id =
252b86c4
JB		 1070 ieee80211_duration(tx, skb, group_addr, next_len);
1071 }
03f93c3d
JB		 1072
1073 return TX_CONTINUE;
1074}
1075
e2ebc74d
JB		 1076/* actual transmit path */
1077
a622ab72
JB		 1078static bool ieee80211_tx_prep_agg(struct ieee80211_tx_data *tx,
1079 struct sk_buff *skb,
1080 struct ieee80211_tx_info *info,
1081 struct tid_ampdu_tx *tid_tx,
1082 int tid)
1083{
1084 bool queued = false;
285fa695 1085 bool reset_agg_timer = false;
aa454580 1086 struct sk_buff *purge_skb = NULL;
a622ab72
JB		 1087
1088 if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1089 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1090 reset_agg_timer = true;
0ab33703
JB		 1091 } else if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
1092 /*
1093 * nothing -- this aggregation session is being started
1094 * but that might still fail with the driver
1095 */
ba8c3d6f 1096 } else if (!tx->sta->sta.txq[tid]) {
a622ab72
JB		 1097 spin_lock(&tx->sta->lock);
1098 /*
1099 * Need to re-check now, because we may get here
1100 *
1101 * 1) in the window during which the setup is actually
1102 * already done, but not marked yet because not all
1103 * packets are spliced over to the driver pending
1104 * queue yet -- if this happened we acquire the lock
1105 * either before or after the splice happens, but
1106 * need to recheck which of these cases happened.
1107 *
1108 * 2) during session teardown, if the OPERATIONAL bit
1109 * was cleared due to the teardown but the pointer
1110 * hasn't been assigned NULL yet (or we loaded it
1111 * before it was assigned) -- in this case it may
1112 * now be NULL which means we should just let the
1113 * packet pass through because splicing the frames
1114 * back is already done.
1115 */
40b275b6 1116 tid_tx = rcu_dereference_protected_tid_tx(tx->sta, tid);
a622ab72
JB		 1117
1118 if (!tid_tx) {
1119 /* do nothing, let packet pass through */
1120 } else if (test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state)) {
1121 info->flags |= IEEE80211_TX_CTL_AMPDU;
285fa695 1122 reset_agg_timer = true;
a622ab72
JB		 1123 } else {
1124 queued = true;
f6d4671a
EG		 1125 if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) {
1126 clear_sta_flag(tx->sta, WLAN_STA_SP);
1127 ps_dbg(tx->sta->sdata,
1128 "STA %pM aid %d: SP frame queued, close the SP w/o telling the peer\n",
1129 tx->sta->sta.addr, tx->sta->sta.aid);
1130 }
a622ab72
JB		 1131 info->control.vif = &tx->sdata->vif;
1132 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING;
facde7f3 1133 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
a622ab72 1134 __skb_queue_tail(&tid_tx->pending, skb);
aa454580
HS		 1135 if (skb_queue_len(&tid_tx->pending) > STA_MAX_TX_BUFFER)
1136 purge_skb = __skb_dequeue(&tid_tx->pending);
a622ab72
JB		 1137 }
1138 spin_unlock(&tx->sta->lock);
aa454580
HS		 1139
1140 if (purge_skb)
c3e7724b 1141 ieee80211_free_txskb(&tx->local->hw, purge_skb);
a622ab72
JB		 1142 }
1143
285fa695
NM		 1144 /* reset session timer */
1145 if (reset_agg_timer && tid_tx->timeout)
12d3952f 1146 tid_tx->last_tx = jiffies;
285fa695 1147
a622ab72
JB		 1148 return queued;
1149}
1150
58d4185e
JB		 1151/*
1152 * initialises @tx
7c10770f
JB		 1153 * pass %NULL for the station if unknown, a valid pointer if known
1154 * or an ERR_PTR() if the station is known not to exist
58d4185e 1155 */
9ae54c84 1156static ieee80211_tx_result
3b8d81e0
JB		 1157ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
1158 struct ieee80211_tx_data *tx,
7c10770f 1159 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1160{
3b8d81e0 1161 struct ieee80211_local *local = sdata->local;
58d4185e 1162 struct ieee80211_hdr *hdr;
e039fa4a 1163 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
68f2b517 1164 int tid;
a622ab72 1165 u8 *qc;
e2ebc74d
JB		 1166
1167 memset(tx, 0, sizeof(*tx));
1168 tx->skb = skb;
e2ebc74d 1169 tx->local = local;
3b8d81e0 1170 tx->sdata = sdata;
252b86c4 1171 __skb_queue_head_init(&tx->skbs);
e2ebc74d 1172
cd8ffc80
JB		 1173 /*
1174 * If this flag is set to true anywhere, and we get here,
1175 * we are doing the needed processing, so remove the flag
1176 * now.
1177 */
1178 info->flags &= ~IEEE80211_TX_INTFL_NEED_TXPROCESSING;
1179
58d4185e
JB		 1180 hdr = (struct ieee80211_hdr *) skb->data;
1181
7c10770f
JB		 1182 if (likely(sta)) {
1183 if (!IS_ERR(sta))
1184 tx->sta = sta;
1185 } else {
1186 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1187 tx->sta = rcu_dereference(sdata->u.vlan.sta);
1188 if (!tx->sta && sdata->wdev.use_4addr)
1189 return TX_DROP;
1190 } else if (info->flags & (IEEE80211_TX_INTFL_NL80211_FRAME_TX |
1191 IEEE80211_TX_CTL_INJECTED) ||
1192 tx->sdata->control_port_protocol == tx->skb->protocol) {
1193 tx->sta = sta_info_get_bss(sdata, hdr->addr1);
1194 }
1195 if (!tx->sta && !is_multicast_ether_addr(hdr->addr1))
1196 tx->sta = sta_info_get(sdata, hdr->addr1);
3f0e0b22 1197 }
58d4185e 1198
cd8ffc80 1199 if (tx->sta && ieee80211_is_data_qos(hdr->frame_control) &&
49a59543 1200 !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
30686bf7
JB		 1201 ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) &&
1202 !ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) {
cd8ffc80
JB		 1203 struct tid_ampdu_tx *tid_tx;
1204
8b30b1fe
S		 1205 qc = ieee80211_get_qos_ctl(hdr);
1206 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
1207
a622ab72
JB		 1208 tid_tx = rcu_dereference(tx->sta->ampdu_mlme.tid_tx[tid]);
1209 if (tid_tx) {
1210 bool queued;
cd8ffc80 1211
a622ab72
JB		 1212 queued = ieee80211_tx_prep_agg(tx, skb, info,
1213 tid_tx, tid);
1214
1215 if (unlikely(queued))
1216 return TX_QUEUED;
1217 }
8b30b1fe
S		 1218 }
1219
badffb72 1220 if (is_multicast_ether_addr(hdr->addr1)) {
5cf121c3 1221 tx->flags &= ~IEEE80211_TX_UNICAST;
e039fa4a 1222 info->flags |= IEEE80211_TX_CTL_NO_ACK;
6fd67e93 1223 } else
5cf121c3 1224 tx->flags |= IEEE80211_TX_UNICAST;
58d4185e 1225
a26eb27a
JB		 1226 if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
1227 if (!(tx->flags & IEEE80211_TX_UNICAST) ||
1228 skb->len + FCS_LEN <= local->hw.wiphy->frag_threshold ||
1229 info->flags & IEEE80211_TX_CTL_AMPDU)
1230 info->flags |= IEEE80211_TX_CTL_DONTFRAG;
58d4185e
JB		 1231 }
1232
e2ebc74d 1233 if (!tx->sta)
e039fa4a 1234 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1 1235 else if (test_and_clear_sta_flag(tx->sta, WLAN_STA_CLEAR_PS_FILT)) {
e039fa4a 1236 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT;
f7418bc1
FF		 1237 ieee80211_check_fast_xmit(tx->sta);
1238 }
58d4185e 1239
e039fa4a 1240 info->flags |= IEEE80211_TX_CTL_FIRST_FRAGMENT;
e2ebc74d 1241
9ae54c84 1242 return TX_CONTINUE;
e2ebc74d
JB		 1243}
1244
80a83cfc
MK		 1245static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
1246 struct ieee80211_vif *vif,
dbef5362 1247 struct sta_info *sta,
80a83cfc 1248 struct sk_buff *skb)
ba8c3d6f
FF		 1249{
1250 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
ba8c3d6f 1251 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
ba8c3d6f 1252 struct ieee80211_txq *txq = NULL;
ba8c3d6f 1253
c3732a7b
FF		 1254 if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
1255 (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
80a83cfc 1256 return NULL;
ba8c3d6f
FF		 1257
1258 if (!ieee80211_is_data(hdr->frame_control))
80a83cfc 1259 return NULL;
ba8c3d6f 1260
dbef5362 1261 if (sta) {
ba8c3d6f
FF		 1262 u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
1263
dbef5362
MK		 1264 if (!sta->uploaded)
1265 return NULL;
1266
1267 txq = sta->sta.txq[tid];
ba8c3d6f
FF		 1268 } else if (vif) {
1269 txq = vif->txq;
1270 }
1271
1272 if (!txq)
80a83cfc 1273 return NULL;
ba8c3d6f 1274
80a83cfc
MK		 1275 return to_txq_info(txq);
1276}
ba8c3d6f 1277
5caa328e
MK		 1278static void ieee80211_set_skb_enqueue_time(struct sk_buff *skb)
1279{
1280 IEEE80211_SKB_CB(skb)->control.enqueue_time = codel_get_time();
1281}
1282
1283static void ieee80211_set_skb_vif(struct sk_buff *skb, struct txq_info *txqi)
1284{
1285 IEEE80211_SKB_CB(skb)->control.vif = txqi->txq.vif;
1286}
1287
1288static u32 codel_skb_len_func(const struct sk_buff *skb)
1289{
1290 return skb->len;
1291}
1292
1293static codel_time_t codel_skb_time_func(const struct sk_buff *skb)
1294{
1295 const struct ieee80211_tx_info *info;
1296
1297 info = (const struct ieee80211_tx_info *)skb->cb;
1298 return info->control.enqueue_time;
1299}
1300
1301static struct sk_buff *codel_dequeue_func(struct codel_vars *cvars,
1302 void *ctx)
1303{
1304 struct ieee80211_local *local;
1305 struct txq_info *txqi;
1306 struct fq *fq;
1307 struct fq_flow *flow;
1308
1309 txqi = ctx;
1310 local = vif_to_sdata(txqi->txq.vif)->local;
1311 fq = &local->fq;
1312
1313 if (cvars == &txqi->def_cvars)
1314 flow = &txqi->def_flow;
1315 else
1316 flow = &fq->flows[cvars - local->cvars];
1317
1318 return fq_flow_dequeue(fq, flow);
1319}
1320
1321static void codel_drop_func(struct sk_buff *skb,
1322 void *ctx)
1323{
1324 struct ieee80211_local *local;
1325 struct ieee80211_hw *hw;
1326 struct txq_info *txqi;
1327
1328 txqi = ctx;
1329 local = vif_to_sdata(txqi->txq.vif)->local;
1330 hw = &local->hw;
1331
1332 ieee80211_free_txskb(hw, skb);
1333}
1334
fa962b92
MK		 1335static struct sk_buff *fq_tin_dequeue_func(struct fq *fq,
1336 struct fq_tin *tin,
1337 struct fq_flow *flow)
1338{
5caa328e
MK		 1339 struct ieee80211_local *local;
1340 struct txq_info *txqi;
1341 struct codel_vars *cvars;
1342 struct codel_params *cparams;
1343 struct codel_stats *cstats;
1344
1345 local = container_of(fq, struct ieee80211_local, fq);
1346 txqi = container_of(tin, struct txq_info, tin);
1347 cparams = &local->cparams;
8d51dbb8 1348 cstats = &txqi->cstats;
5caa328e
MK		 1349
1350 if (flow == &txqi->def_flow)
1351 cvars = &txqi->def_cvars;
1352 else
1353 cvars = &local->cvars[flow - fq->flows];
1354
1355 return codel_dequeue(txqi,
1356 &flow->backlog,
1357 cparams,
1358 cvars,
1359 cstats,
1360 codel_skb_len_func,
1361 codel_skb_time_func,
1362 codel_drop_func,
1363 codel_dequeue_func);
fa962b92
MK		 1364}
1365
1366static void fq_skb_free_func(struct fq *fq,
1367 struct fq_tin *tin,
1368 struct fq_flow *flow,
1369 struct sk_buff *skb)
1370{
1371 struct ieee80211_local *local;
1372
1373 local = container_of(fq, struct ieee80211_local, fq);
1374 ieee80211_free_txskb(&local->hw, skb);
1375}
1376
1377static struct fq_flow *fq_flow_get_default_func(struct fq *fq,
1378 struct fq_tin *tin,
1379 int idx,
1380 struct sk_buff *skb)
1381{
1382 struct txq_info *txqi;
1383
1384 txqi = container_of(tin, struct txq_info, tin);
1385 return &txqi->def_flow;
1386}
1387
80a83cfc
MK		 1388static void ieee80211_txq_enqueue(struct ieee80211_local *local,
1389 struct txq_info *txqi,
1390 struct sk_buff *skb)
1391{
fa962b92
MK		 1392 struct fq *fq = &local->fq;
1393 struct fq_tin *tin = &txqi->tin;
f2ac7e30 1394
5caa328e 1395 ieee80211_set_skb_enqueue_time(skb);
fa962b92
MK		 1396 fq_tin_enqueue(fq, tin, skb,
1397 fq_skb_free_func,
1398 fq_flow_get_default_func);
1399}
ba8c3d6f 1400
fa962b92
MK		 1401void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
1402 struct sta_info *sta,
1403 struct txq_info *txqi, int tid)
1404{
1405 fq_tin_init(&txqi->tin);
1406 fq_flow_init(&txqi->def_flow);
5caa328e 1407 codel_vars_init(&txqi->def_cvars);
8d51dbb8 1408 codel_stats_init(&txqi->cstats);
bb42f2d1 1409 __skb_queue_head_init(&txqi->frags);
fa962b92
MK		 1410
1411 txqi->txq.vif = &sdata->vif;
1412
1413 if (sta) {
1414 txqi->txq.sta = &sta->sta;
1415 sta->sta.txq[tid] = &txqi->txq;
1416 txqi->txq.tid = tid;
731977e9 1417 txqi->txq.ac = ieee80211_ac_from_tid(tid);
fa962b92
MK		 1418 } else {
1419 sdata->vif.txq = &txqi->txq;
1420 txqi->txq.tid = 0;
1421 txqi->txq.ac = IEEE80211_AC_BE;
80a83cfc 1422 }
fa962b92 1423}
ba8c3d6f 1424
fa962b92
MK		 1425void ieee80211_txq_purge(struct ieee80211_local *local,
1426 struct txq_info *txqi)
1427{
1428 struct fq *fq = &local->fq;
1429 struct fq_tin *tin = &txqi->tin;
1430
1431 fq_tin_reset(fq, tin, fq_skb_free_func);
bb42f2d1 1432 ieee80211_purge_tx_queue(&local->hw, &txqi->frags);
fa962b92
MK		 1433}
1434
1435int ieee80211_txq_setup_flows(struct ieee80211_local *local)
1436{
1437 struct fq *fq = &local->fq;
1438 int ret;
5caa328e 1439 int i;
3ff23cd5
THJ		 1440 bool supp_vht = false;
1441 enum nl80211_band band;
fa962b92
MK		 1442
1443 if (!local->ops->wake_tx_queue)
1444 return 0;
1445
1446 ret = fq_init(fq, 4096);
1447 if (ret)
1448 return ret;
1449
3ff23cd5
THJ		 1450 /*
1451 * If the hardware doesn't support VHT, it is safe to limit the maximum
1452 * queue size. 4 Mbytes is 64 max-size aggregates in 802.11n.
1453 */
1454 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1455 struct ieee80211_supported_band *sband;
1456
1457 sband = local->hw.wiphy->bands[band];
1458 if (!sband)
1459 continue;
1460
1461 supp_vht = supp_vht || sband->vht_cap.vht_supported;
1462 }
1463
1464 if (!supp_vht)
1465 fq->memory_limit = 4 << 20; /* 4 Mbytes */
1466
5caa328e 1467 codel_params_init(&local->cparams);
5caa328e
MK		 1468 local->cparams.interval = MS2TIME(100);
1469 local->cparams.target = MS2TIME(20);
1470 local->cparams.ecn = true;
1471
1472 local->cvars = kcalloc(fq->flows_cnt, sizeof(local->cvars[0]),
1473 GFP_KERNEL);
1474 if (!local->cvars) {
59a7c828 1475 spin_lock_bh(&fq->lock);
5caa328e 1476 fq_reset(fq, fq_skb_free_func);
59a7c828 1477 spin_unlock_bh(&fq->lock);
5caa328e
MK		 1478 return -ENOMEM;
1479 }
1480
1481 for (i = 0; i < fq->flows_cnt; i++)
1482 codel_vars_init(&local->cvars[i]);
1483
fa962b92
MK		 1484 return 0;
1485}
1486
1487void ieee80211_txq_teardown_flows(struct ieee80211_local *local)
1488{
1489 struct fq *fq = &local->fq;
1490
1491 if (!local->ops->wake_tx_queue)
1492 return;
1493
5caa328e
MK		 1494 kfree(local->cvars);
1495 local->cvars = NULL;
1496
59a7c828 1497 spin_lock_bh(&fq->lock);
fa962b92 1498 fq_reset(fq, fq_skb_free_func);
59a7c828 1499 spin_unlock_bh(&fq->lock);
ba8c3d6f
FF		 1500}
1501
bb42f2d1
THJ		 1502static bool ieee80211_queue_skb(struct ieee80211_local *local,
1503 struct ieee80211_sub_if_data *sdata,
1504 struct sta_info *sta,
1505 struct sk_buff *skb)
1506{
bb42f2d1
THJ		 1507 struct fq *fq = &local->fq;
1508 struct ieee80211_vif *vif;
1509 struct txq_info *txqi;
bb42f2d1
THJ		 1510
1511 if (!local->ops->wake_tx_queue ||
1512 sdata->vif.type == NL80211_IFTYPE_MONITOR)
1513 return false;
1514
bb42f2d1
THJ		 1515 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1516 sdata = container_of(sdata->bss,
1517 struct ieee80211_sub_if_data, u.ap);
1518
1519 vif = &sdata->vif;
dbef5362 1520 txqi = ieee80211_get_txq(local, vif, sta, skb);
bb42f2d1
THJ		 1521
1522 if (!txqi)
1523 return false;
1524
bb42f2d1
THJ		 1525 spin_lock_bh(&fq->lock);
1526 ieee80211_txq_enqueue(local, txqi, skb);
1527 spin_unlock_bh(&fq->lock);
1528
1529 drv_wake_tx_queue(local, txqi);
1530
1531 return true;
1532}
1533
11127e91
JB		 1534static bool ieee80211_tx_frags(struct ieee80211_local *local,
1535 struct ieee80211_vif *vif,
1536 struct ieee80211_sta *sta,
1537 struct sk_buff_head *skbs,
1538 bool txpending)
e2ebc74d 1539{
80a83cfc 1540 struct ieee80211_tx_control control = {};
252b86c4 1541 struct sk_buff *skb, *tmp;
3b8d81e0 1542 unsigned long flags;
e2ebc74d 1543
252b86c4 1544 skb_queue_walk_safe(skbs, skb, tmp) {
3a25a8c8
JB		 1545 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1546 int q = info->hw_queue;
1547
1548#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
1549 if (WARN_ON_ONCE(q >= local->hw.queues)) {
1550 __skb_unlink(skb, skbs);
c3e7724b 1551 ieee80211_free_txskb(&local->hw, skb);
3a25a8c8
JB		 1552 continue;
1553 }
1554#endif
3b8d81e0
JB		 1555
1556 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
3b8d81e0 1557 if (local->queue_stop_reasons[q] ||
7bb45683 1558 (!txpending && !skb_queue_empty(&local->pending[q]))) {
6c17b77b 1559 if (unlikely(info->flags &
a7679ed5
SF		 1560 IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
1561 if (local->queue_stop_reasons[q] &
1562 ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
1563 /*
1564 * Drop off-channel frames if queues
1565 * are stopped for any reason other
1566 * than off-channel operation. Never
1567 * queue them.
1568 */
1569 spin_unlock_irqrestore(
1570 &local->queue_stop_reason_lock,
1571 flags);
1572 ieee80211_purge_tx_queue(&local->hw,
1573 skbs);
1574 return true;
1575 }
1576 } else {
1577
6c17b77b 1578 /*
a7679ed5
SF		 1579 * Since queue is stopped, queue up frames for
1580 * later transmission from the tx-pending
1581 * tasklet when the queue is woken again.
6c17b77b 1582 */
a7679ed5
SF		 1583 if (txpending)
1584 skb_queue_splice_init(skbs,
1585 &local->pending[q]);
1586 else
1587 skb_queue_splice_tail_init(skbs,
1588 &local->pending[q]);
1589
1590 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1591 flags);
1592 return false;
6c17b77b 1593 }
7bb45683 1594 }
3b8d81e0 1595 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
f8e79ddd 1596
11127e91 1597 info->control.vif = vif;
80a83cfc 1598 control.sta = sta;
f0e72851 1599
11127e91 1600 __skb_unlink(skb, skbs);
80a83cfc 1601 drv_tx(local, &control, skb);
11127e91 1602 }
5061b0c2 1603
11127e91
JB		 1604 return true;
1605}
1606
1607/*
1608 * Returns false if the frame couldn't be transmitted but was queued instead.
1609 */
1610static bool __ieee80211_tx(struct ieee80211_local *local,
1611 struct sk_buff_head *skbs, int led_len,
1612 struct sta_info *sta, bool txpending)
1613{
1614 struct ieee80211_tx_info *info;
1615 struct ieee80211_sub_if_data *sdata;
1616 struct ieee80211_vif *vif;
1617 struct ieee80211_sta *pubsta;
1618 struct sk_buff *skb;
1619 bool result = true;
1620 __le16 fc;
5061b0c2 1621
11127e91
JB		 1622 if (WARN_ON(skb_queue_empty(skbs)))
1623 return true;
ec25acc4 1624
11127e91
JB		 1625 skb = skb_peek(skbs);
1626 fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
1627 info = IEEE80211_SKB_CB(skb);
1628 sdata = vif_to_sdata(info->control.vif);
1629 if (sta && !sta->uploaded)
1630 sta = NULL;
1631
1632 if (sta)
1633 pubsta = &sta->sta;
1634 else
1635 pubsta = NULL;
1636
1637 switch (sdata->vif.type) {
1638 case NL80211_IFTYPE_MONITOR:
d8212184 1639 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
c82b5a74
JB		 1640 vif = &sdata->vif;
1641 break;
1642 }
4b6f1dd6 1643 sdata = rcu_dereference(local->monitor_sdata);
3a25a8c8 1644 if (sdata) {
4b6f1dd6 1645 vif = &sdata->vif;
3a25a8c8
JB		 1646 info->hw_queue =
1647 vif->hw_queue[skb_get_queue_mapping(skb)];
30686bf7 1648 } else if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
63b4d8b3 1649 ieee80211_purge_tx_queue(&local->hw, skbs);
3a25a8c8
JB		 1650 return true;
1651 } else
4b6f1dd6 1652 vif = NULL;
11127e91
JB		 1653 break;
1654 case NL80211_IFTYPE_AP_VLAN:
1655 sdata = container_of(sdata->bss,
1656 struct ieee80211_sub_if_data, u.ap);
1657 /* fall through */
1658 default:
1659 vif = &sdata->vif;
1660 break;
e2ebc74d 1661 }
2de8e0d9 1662
cb831b53
JB		 1663 result = ieee80211_tx_frags(local, vif, pubsta, skbs,
1664 txpending);
11127e91 1665
74e4dbfd 1666 ieee80211_tpt_led_trig_tx(local, fc, led_len);
74e4dbfd 1667
4db4e0a1 1668 WARN_ON_ONCE(!skb_queue_empty(skbs));
252b86c4 1669
11127e91 1670 return result;
e2ebc74d
JB		 1671}
1672
97b045d6
JB		 1673/*
1674 * Invoke TX handlers, return 0 on success and non-zero if the
1675 * frame was dropped or queued.
bb42f2d1
THJ		 1676 *
1677 * The handlers are split into an early and late part. The latter is everything
1678 * that can be sensitive to reordering, and will be deferred to after packets
1679 * are dequeued from the intermediate queues (when they are enabled).
97b045d6 1680 */
bb42f2d1 1681static int invoke_tx_handlers_early(struct ieee80211_tx_data *tx)
97b045d6 1682{
97b045d6 1683 ieee80211_tx_result res = TX_DROP;
97b045d6 1684
9aa4aee3
JB		 1685#define CALL_TXH(txh) \
1686 do { \
1687 res = txh(tx); \
1688 if (res != TX_CONTINUE) \
1689 goto txh_done; \
1690 } while (0)
1691
5c1b98a5 1692 CALL_TXH(ieee80211_tx_h_dynamic_ps);
9aa4aee3
JB		 1693 CALL_TXH(ieee80211_tx_h_check_assoc);
1694 CALL_TXH(ieee80211_tx_h_ps_buf);
a621fa4d 1695 CALL_TXH(ieee80211_tx_h_check_control_port_protocol);
9aa4aee3 1696 CALL_TXH(ieee80211_tx_h_select_key);
30686bf7 1697 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
af65cd96 1698 CALL_TXH(ieee80211_tx_h_rate_ctrl);
c6fcf6bc 1699
bb42f2d1
THJ		 1700 txh_done:
1701 if (unlikely(res == TX_DROP)) {
1702 I802_DEBUG_INC(tx->local->tx_handlers_drop);
1703 if (tx->skb)
1704 ieee80211_free_txskb(&tx->local->hw, tx->skb);
1705 else
1706 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
1707 return -1;
1708 } else if (unlikely(res == TX_QUEUED)) {
1709 I802_DEBUG_INC(tx->local->tx_handlers_queued);
1710 return -1;
1711 }
1712
1713 return 0;
1714}
1715
1716/*
1717 * Late handlers can be called while the sta lock is held. Handlers that can
1718 * cause packets to be generated will cause deadlock!
1719 */
1720static int invoke_tx_handlers_late(struct ieee80211_tx_data *tx)
1721{
1722 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx->skb);
1723 ieee80211_tx_result res = TX_CONTINUE;
1724
aa5b5492
JB		 1725 if (unlikely(info->flags & IEEE80211_TX_INTFL_RETRANSMISSION)) {
1726 __skb_queue_tail(&tx->skbs, tx->skb);
1727 tx->skb = NULL;
c6fcf6bc 1728 goto txh_done;
aa5b5492 1729 }
c6fcf6bc
JB		 1730
1731 CALL_TXH(ieee80211_tx_h_michael_mic_add);
9aa4aee3
JB		 1732 CALL_TXH(ieee80211_tx_h_sequence);
1733 CALL_TXH(ieee80211_tx_h_fragment);
d9e8a70f 1734 /* handlers after fragment must be aware of tx info fragmentation! */
9aa4aee3
JB		 1735 CALL_TXH(ieee80211_tx_h_stats);
1736 CALL_TXH(ieee80211_tx_h_encrypt);
30686bf7 1737 if (!ieee80211_hw_check(&tx->local->hw, HAS_RATE_CONTROL))
8fd369ee 1738 CALL_TXH(ieee80211_tx_h_calculate_duration);
d9e8a70f 1739#undef CALL_TXH
97b045d6 1740
d9e8a70f 1741 txh_done:
97b045d6 1742 if (unlikely(res == TX_DROP)) {
5479d0e7 1743 I802_DEBUG_INC(tx->local->tx_handlers_drop);
252b86c4 1744 if (tx->skb)
c3e7724b 1745 ieee80211_free_txskb(&tx->local->hw, tx->skb);
252b86c4 1746 else
1f98ab7f 1747 ieee80211_purge_tx_queue(&tx->local->hw, &tx->skbs);
97b045d6
JB		 1748 return -1;
1749 } else if (unlikely(res == TX_QUEUED)) {
5479d0e7 1750 I802_DEBUG_INC(tx->local->tx_handlers_queued);
97b045d6
JB		 1751 return -1;
1752 }
1753
1754 return 0;
1755}
1756
bb42f2d1
THJ		 1757static int invoke_tx_handlers(struct ieee80211_tx_data *tx)
1758{
1759 int r = invoke_tx_handlers_early(tx);
1760
1761 if (r)
1762 return r;
1763 return invoke_tx_handlers_late(tx);
1764}
1765
06be6b14
FF		 1766bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
1767 struct ieee80211_vif *vif, struct sk_buff *skb,
1768 int band, struct ieee80211_sta **sta)
1769{
1770 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1771 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1772 struct ieee80211_tx_data tx;
88724a81 1773 struct sk_buff *skb2;
06be6b14 1774
7c10770f 1775 if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
06be6b14
FF		 1776 return false;
1777
1778 info->band = band;
1779 info->control.vif = vif;
1780 info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
1781
1782 if (invoke_tx_handlers(&tx))
1783 return false;
1784
1785 if (sta) {
1786 if (tx.sta)
1787 *sta = &tx.sta->sta;
1788 else
1789 *sta = NULL;
1790 }
1791
88724a81
JB		 1792 /* this function isn't suitable for fragmented data frames */
1793 skb2 = __skb_dequeue(&tx.skbs);
1794 if (WARN_ON(skb2 != skb || !skb_queue_empty(&tx.skbs))) {
1795 ieee80211_free_txskb(hw, skb2);
1796 ieee80211_purge_tx_queue(hw, &tx.skbs);
1797 return false;
1798 }
1799
06be6b14
FF		 1800 return true;
1801}
1802EXPORT_SYMBOL(ieee80211_tx_prepare_skb);
1803
7bb45683
JB		 1804/*
1805 * Returns false if the frame couldn't be transmitted but was queued instead.
1806 */
1807static bool ieee80211_tx(struct ieee80211_sub_if_data *sdata,
7c10770f
JB		 1808 struct sta_info *sta, struct sk_buff *skb,
1809 bool txpending)
e2ebc74d 1810{
3b8d81e0 1811 struct ieee80211_local *local = sdata->local;
5cf121c3 1812 struct ieee80211_tx_data tx;
97b045d6 1813 ieee80211_tx_result res_prepare;
e039fa4a 1814 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
7bb45683 1815 bool result = true;
74e4dbfd 1816 int led_len;
e2ebc74d 1817
e2ebc74d
JB		 1818 if (unlikely(skb->len < 10)) {
1819 dev_kfree_skb(skb);
7bb45683 1820 return true;
e2ebc74d
JB		 1821 }
1822
58d4185e 1823 /* initialises tx */
74e4dbfd 1824 led_len = skb->len;
7c10770f 1825 res_prepare = ieee80211_tx_prepare(sdata, &tx, sta, skb);
e2ebc74d 1826
cd8ffc80 1827 if (unlikely(res_prepare == TX_DROP)) {
c3e7724b 1828 ieee80211_free_txskb(&local->hw, skb);
55de908a 1829 return true;
cd8ffc80 1830 } else if (unlikely(res_prepare == TX_QUEUED)) {
55de908a 1831 return true;
e2ebc74d
JB		 1832 }
1833
3a25a8c8
JB		 1834 /* set up hw_queue value early */
1835 if (!(info->flags & IEEE80211_TX_CTL_TX_OFFCHAN) ||
30686bf7 1836 !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
3a25a8c8
JB		 1837 info->hw_queue =
1838 sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
1839
bb42f2d1
THJ		 1840 if (invoke_tx_handlers_early(&tx))
1841 return false;
1842
1843 if (ieee80211_queue_skb(local, sdata, tx.sta, tx.skb))
1844 return true;
1845
1846 if (!invoke_tx_handlers_late(&tx))
74e4dbfd
JB		 1847 result = __ieee80211_tx(local, &tx.skbs, led_len,
1848 tx.sta, txpending);
55de908a 1849
7bb45683 1850 return result;
e2ebc74d
JB		 1851}
1852
1853/* device xmit handlers */
1854
3bff1865 1855static int ieee80211_skb_resize(struct ieee80211_sub_if_data *sdata,
23c0752a
JB		 1856 struct sk_buff *skb,
1857 int head_need, bool may_encrypt)
1858{
3bff1865 1859 struct ieee80211_local *local = sdata->local;
23c0752a
JB		 1860 int tail_need = 0;
1861
3bff1865 1862 if (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt) {
23c0752a
JB		 1863 tail_need = IEEE80211_ENCRYPT_TAILROOM;
1864 tail_need -= skb_tailroom(skb);
1865 tail_need = max_t(int, tail_need, 0);
1866 }
1867
c70f59a2 1868 if (skb_cloned(skb) &&
30686bf7 1869 (!ieee80211_hw_check(&local->hw, SUPPORTS_CLONED_SKBS) ||
c70f59a2 1870 !skb_clone_writable(skb, ETH_HLEN) ||
17c18bf8 1871 (may_encrypt && sdata->crypto_tx_tailroom_needed_cnt)))
23c0752a 1872 I802_DEBUG_INC(local->tx_expand_skb_head_cloned);
4cd06a34 1873 else if (head_need || tail_need)
23c0752a 1874 I802_DEBUG_INC(local->tx_expand_skb_head);
4cd06a34
FF		 1875 else
1876 return 0;
23c0752a
JB		 1877
1878 if (pskb_expand_head(skb, head_need, tail_need, GFP_ATOMIC)) {
0fb9a9ec
JP		 1879 wiphy_debug(local->hw.wiphy,
1880 "failed to reallocate TX buffer\n");
23c0752a
JB		 1881 return -ENOMEM;
1882 }
1883
23c0752a
JB		 1884 return 0;
1885}
1886
7c10770f
JB		 1887void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1888 struct sta_info *sta, struct sk_buff *skb)
e2ebc74d 1889{
3b8d81e0 1890 struct ieee80211_local *local = sdata->local;
e039fa4a 1891 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
e32f85f7 1892 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
e2ebc74d 1893 int headroom;
23c0752a 1894 bool may_encrypt;
e2ebc74d 1895
3b8d81e0 1896 may_encrypt = !(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT);
23c0752a 1897
3b8d81e0 1898 headroom = local->tx_headroom;
23c0752a 1899 if (may_encrypt)
2475b1cc 1900 headroom += sdata->encrypt_headroom;
23c0752a
JB		 1901 headroom -= skb_headroom(skb);
1902 headroom = max_t(int, 0, headroom);
1903
3bff1865 1904 if (ieee80211_skb_resize(sdata, skb, headroom, may_encrypt)) {
c3e7724b 1905 ieee80211_free_txskb(&local->hw, skb);
3b8d81e0 1906 return;
e2ebc74d
JB		 1907 }
1908
740c1aa3 1909 hdr = (struct ieee80211_hdr *) skb->data;
5061b0c2 1910 info->control.vif = &sdata->vif;
e2ebc74d 1911
3f52b7e3
MP		 1912 if (ieee80211_vif_is_mesh(&sdata->vif)) {
1913 if (ieee80211_is_data(hdr->frame_control) &&
1914 is_unicast_ether_addr(hdr->addr1)) {
bf7cd94d 1915 if (mesh_nexthop_resolve(sdata, skb))
3f52b7e3
MP		 1916 return; /* skb queued: don't free */
1917 } else {
1918 ieee80211_mps_set_frame_flags(sdata, NULL, hdr);
1919 }
98aed9fd 1920 }
cca89496 1921
2154c81c 1922 ieee80211_set_qos_hdr(sdata, skb);
7c10770f 1923 ieee80211_tx(sdata, sta, skb, false);
e2ebc74d
JB		 1924}
1925
dfdfc2be
SE		 1926static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
1927 struct sk_buff *skb)
73b9f03a
JB		 1928{
1929 struct ieee80211_radiotap_iterator iterator;
1930 struct ieee80211_radiotap_header *rthdr =
1931 (struct ieee80211_radiotap_header *) skb->data;
1932 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
dfdfc2be
SE		 1933 struct ieee80211_supported_band *sband =
1934 local->hw.wiphy->bands[info->band];
73b9f03a
JB		 1935 int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len,
1936 NULL);
1937 u16 txflags;
dfdfc2be
SE		 1938 u16 rate = 0;
1939 bool rate_found = false;
1940 u8 rate_retries = 0;
1941 u16 rate_flags = 0;
f66b60f6 1942 u8 mcs_known, mcs_flags, mcs_bw;
646e76bb
LB		 1943 u16 vht_known;
1944 u8 vht_mcs = 0, vht_nss = 0;
dfdfc2be 1945 int i;
73b9f03a
JB		 1946
1947 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1948 IEEE80211_TX_CTL_DONTFRAG;
1949
1950 /*
1951 * for every radiotap entry that is present
1952 * (ieee80211_radiotap_iterator_next returns -ENOENT when no more
1953 * entries present, or -EINVAL on error)
1954 */
1955
1956 while (!ret) {
1957 ret = ieee80211_radiotap_iterator_next(&iterator);
1958
1959 if (ret)
1960 continue;
1961
1962 /* see if this argument is something we can use */
1963 switch (iterator.this_arg_index) {
1964 /*
1965 * You must take care when dereferencing iterator.this_arg
1966 * for multibyte types... the pointer is not aligned. Use
1967 * get_unaligned((type *)iterator.this_arg) to dereference
1968 * iterator.this_arg for type "type" safely on all arches.
1969 */
1970 case IEEE80211_RADIOTAP_FLAGS:
1971 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
1972 /*
1973 * this indicates that the skb we have been
1974 * handed has the 32-bit FCS CRC at the end...
1975 * we should react to that by snipping it off
1976 * because it will be recomputed and added
1977 * on transmission
1978 */
1979 if (skb->len < (iterator._max_length + FCS_LEN))
1980 return false;
1981
1982 skb_trim(skb, skb->len - FCS_LEN);
1983 }
1984 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_WEP)
1985 info->flags &= ~IEEE80211_TX_INTFL_DONT_ENCRYPT;
1986 if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FRAG)
1987 info->flags &= ~IEEE80211_TX_CTL_DONTFRAG;
1988 break;
1989
1990 case IEEE80211_RADIOTAP_TX_FLAGS:
1991 txflags = get_unaligned_le16(iterator.this_arg);
1992 if (txflags & IEEE80211_RADIOTAP_F_TX_NOACK)
1993 info->flags |= IEEE80211_TX_CTL_NO_ACK;
1994 break;
1995
dfdfc2be
SE		 1996 case IEEE80211_RADIOTAP_RATE:
1997 rate = *iterator.this_arg;
1998 rate_flags = 0;
1999 rate_found = true;
2000 break;
2001
2002 case IEEE80211_RADIOTAP_DATA_RETRIES:
2003 rate_retries = *iterator.this_arg;
2004 break;
2005
2006 case IEEE80211_RADIOTAP_MCS:
2007 mcs_known = iterator.this_arg[0];
2008 mcs_flags = iterator.this_arg[1];
2009 if (!(mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_MCS))
2010 break;
2011
2012 rate_found = true;
2013 rate = iterator.this_arg[2];
2014 rate_flags = IEEE80211_TX_RC_MCS;
2015
2016 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_GI &&
2017 mcs_flags & IEEE80211_RADIOTAP_MCS_SGI)
2018 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2019
f66b60f6 2020 mcs_bw = mcs_flags & IEEE80211_RADIOTAP_MCS_BW_MASK;
dfdfc2be 2021 if (mcs_known & IEEE80211_RADIOTAP_MCS_HAVE_BW &&
f66b60f6 2022 mcs_bw == IEEE80211_RADIOTAP_MCS_BW_40)
dfdfc2be
SE		 2023 rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
2024 break;
2025
646e76bb
LB		 2026 case IEEE80211_RADIOTAP_VHT:
2027 vht_known = get_unaligned_le16(iterator.this_arg);
2028 rate_found = true;
2029
2030 rate_flags = IEEE80211_TX_RC_VHT_MCS;
2031 if ((vht_known & IEEE80211_RADIOTAP_VHT_KNOWN_GI) &&
2032 (iterator.this_arg[2] &
2033 IEEE80211_RADIOTAP_VHT_FLAG_SGI))
2034 rate_flags |= IEEE80211_TX_RC_SHORT_GI;
2035 if (vht_known &
2036 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH) {
2037 if (iterator.this_arg[3] == 1)
2038 rate_flags |=
2039 IEEE80211_TX_RC_40_MHZ_WIDTH;
2040 else if (iterator.this_arg[3] == 4)
2041 rate_flags |=
2042 IEEE80211_TX_RC_80_MHZ_WIDTH;
2043 else if (iterator.this_arg[3] == 11)
2044 rate_flags |=
2045 IEEE80211_TX_RC_160_MHZ_WIDTH;
2046 }
2047
2048 vht_mcs = iterator.this_arg[4] >> 4;
2049 vht_nss = iterator.this_arg[4] & 0xF;
2050 break;
2051
73b9f03a
JB		 2052 /*
2053 * Please update the file
2054 * Documentation/networking/mac80211-injection.txt
2055 * when parsing new fields here.
2056 */
2057
2058 default:
2059 break;
2060 }
2061 }
2062
2063 if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */
2064 return false;
2065
dfdfc2be
SE		 2066 if (rate_found) {
2067 info->control.flags |= IEEE80211_TX_CTRL_RATE_INJECT;
2068
2069 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
2070 info->control.rates[i].idx = -1;
2071 info->control.rates[i].flags = 0;
2072 info->control.rates[i].count = 0;
2073 }
2074
2075 if (rate_flags & IEEE80211_TX_RC_MCS) {
2076 info->control.rates[0].idx = rate;
646e76bb
LB		 2077 } else if (rate_flags & IEEE80211_TX_RC_VHT_MCS) {
2078 ieee80211_rate_set_vht(info->control.rates, vht_mcs,
2079 vht_nss);
dfdfc2be
SE		 2080 } else {
2081 for (i = 0; i < sband->n_bitrates; i++) {
2082 if (rate * 5 != sband->bitrates[i].bitrate)
2083 continue;
2084
2085 info->control.rates[0].idx = i;
2086 break;
2087 }
2088 }
2089
07310a63
FF		 2090 if (info->control.rates[0].idx < 0)
2091 info->control.flags &= ~IEEE80211_TX_CTRL_RATE_INJECT;
2092
dfdfc2be
SE		 2093 info->control.rates[0].flags = rate_flags;
2094 info->control.rates[0].count = min_t(u8, rate_retries + 1,
2095 local->hw.max_rate_tries);
2096 }
2097
73b9f03a
JB		 2098 /*
2099 * remove the radiotap header
2100 * iterator->_max_length was sanity-checked against
2101 * skb->len by iterator init
2102 */
2103 skb_pull(skb, iterator._max_length);
2104
2105 return true;
2106}
2107
d0cf9c0d
SH		 2108netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
2109 struct net_device *dev)
e2ebc74d
JB		 2110{
2111 struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
55de908a 2112 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d
JB		 2113 struct ieee80211_radiotap_header *prthdr =
2114 (struct ieee80211_radiotap_header *)skb->data;
3b8d81e0 2115 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
f75f5c6f 2116 struct ieee80211_hdr *hdr;
5d9cf4a5 2117 struct ieee80211_sub_if_data *tmp_sdata, *sdata;
b4932836 2118 struct cfg80211_chan_def *chandef;
9b8a74e3 2119 u16 len_rthdr;
5d9cf4a5 2120 int hdrlen;
e2ebc74d 2121
9b8a74e3
AG		 2122 /* check for not even having the fixed radiotap header part */
2123 if (unlikely(skb->len < sizeof(struct ieee80211_radiotap_header)))
2124 goto fail; /* too short to be possibly valid */
2125
2126 /* is it a header version we can trust to find length from? */
2127 if (unlikely(prthdr->it_version))
2128 goto fail; /* only version 0 is supported */
2129
2130 /* then there must be a radiotap header with a length we can use */
2131 len_rthdr = ieee80211_get_radiotap_len(skb->data);
2132
2133 /* does the skb contain enough to deliver on the alleged length? */
2134 if (unlikely(skb->len < len_rthdr))
2135 goto fail; /* skb too short for claimed rt header extent */
e2ebc74d 2136
e2ebc74d
JB		 2137 /*
2138 * fix up the pointers accounting for the radiotap
2139 * header still being in there. We are being given
2140 * a precooked IEEE80211 header so no need for
2141 * normal processing
2142 */
9b8a74e3 2143 skb_set_mac_header(skb, len_rthdr);
e2ebc74d 2144 /*
9b8a74e3
AG		 2145 * these are just fixed to the end of the rt area since we
2146 * don't have any better information and at this point, nobody cares
e2ebc74d 2147 */
9b8a74e3
AG		 2148 skb_set_network_header(skb, len_rthdr);
2149 skb_set_transport_header(skb, len_rthdr);
e2ebc74d 2150
5d9cf4a5
JB		 2151 if (skb->len < len_rthdr + 2)
2152 goto fail;
2153
2154 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
2155 hdrlen = ieee80211_hdrlen(hdr->frame_control);
2156
2157 if (skb->len < len_rthdr + hdrlen)
2158 goto fail;
2159
f75f5c6f
HS		 2160 /*
2161 * Initialize skb->protocol if the injected frame is a data frame
2162 * carrying a rfc1042 header
2163 */
5d9cf4a5
JB		 2164 if (ieee80211_is_data(hdr->frame_control) &&
2165 skb->len >= len_rthdr + hdrlen + sizeof(rfc1042_header) + 2) {
2166 u8 *payload = (u8 *)hdr + hdrlen;
2167
b203ca39 2168 if (ether_addr_equal(payload, rfc1042_header))
5d9cf4a5
JB		 2169 skb->protocol = cpu_to_be16((payload[6] << 8) |
2170 payload[7]);
f75f5c6f
HS		 2171 }
2172
3b8d81e0
JB		 2173 memset(info, 0, sizeof(*info));
2174
5d9cf4a5 2175 info->flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
73b9f03a
JB		 2176 IEEE80211_TX_CTL_INJECTED;
2177
5d9cf4a5
JB		 2178 rcu_read_lock();
2179
2180 /*
2181 * We process outgoing injected frames that have a local address
2182 * we handle as though they are non-injected frames.
2183 * This code here isn't entirely correct, the local MAC address
2184 * isn't always enough to find the interface to use; for proper
2185 * VLAN/WDS support we will need a different mechanism (which
2186 * likely isn't going to be monitor interfaces).
2187 */
2188 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2189
2190 list_for_each_entry_rcu(tmp_sdata, &local->interfaces, list) {
2191 if (!ieee80211_sdata_running(tmp_sdata))
2192 continue;
2193 if (tmp_sdata->vif.type == NL80211_IFTYPE_MONITOR ||
2194 tmp_sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
2195 tmp_sdata->vif.type == NL80211_IFTYPE_WDS)
2196 continue;
b203ca39 2197 if (ether_addr_equal(tmp_sdata->vif.addr, hdr->addr2)) {
5d9cf4a5
JB		 2198 sdata = tmp_sdata;
2199 break;
2200 }
2201 }
7351c6bd 2202
55de908a
JB		 2203 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2204 if (!chanctx_conf) {
2205 tmp_sdata = rcu_dereference(local->monitor_sdata);
2206 if (tmp_sdata)
2207 chanctx_conf =
2208 rcu_dereference(tmp_sdata->vif.chanctx_conf);
2209 }
55de908a 2210
b4a7ff75 2211 if (chanctx_conf)
b4932836 2212 chandef = &chanctx_conf->def;
b4a7ff75 2213 else if (!local->use_chanctx)
b4932836 2214 chandef = &local->_oper_chandef;
b4a7ff75
FF		 2215 else
2216 goto fail_rcu;
55de908a
JB		 2217
2218 /*
2219 * Frame injection is not allowed if beaconing is not allowed
2220 * or if we need radar detection. Beaconing is usually not allowed when
2221 * the mode or operation (Adhoc, AP, Mesh) does not support DFS.
2222 * Passive scan is also used in world regulatory domains where
2223 * your country is not known and as such it should be treated as
2224 * NO TX unless the channel is explicitly allowed in which case
2225 * your current regulatory domain would not have the passive scan
2226 * flag.
2227 *
2228 * Since AP mode uses monitor interfaces to inject/TX management
2229 * frames we can make AP mode the exception to this rule once it
2230 * supports radar detection as its implementation can deal with
2231 * radar detection by itself. We can do that later by adding a
2232 * monitor flag interfaces used for AP support.
2233 */
b4932836
JD		 2234 if (!cfg80211_reg_can_beacon(local->hw.wiphy, chandef,
2235 sdata->vif.type))
55de908a
JB		 2236 goto fail_rcu;
2237
73c4e195 2238 info->band = chandef->chan->band;
109843b0
LB		 2239
2240 /* process and remove the injection radiotap header */
2241 if (!ieee80211_parse_tx_radiotap(local, skb))
2242 goto fail_rcu;
2243
7c10770f 2244 ieee80211_xmit(sdata, NULL, skb);
5d9cf4a5
JB		 2245 rcu_read_unlock();
2246
e2ebc74d 2247 return NETDEV_TX_OK;
9b8a74e3 2248
55de908a
JB		 2249fail_rcu:
2250 rcu_read_unlock();
9b8a74e3
AG		 2251fail:
2252 dev_kfree_skb(skb);
2253 return NETDEV_TX_OK; /* meaning, we dealt with the skb */
e2ebc74d
JB		 2254}
2255
97ffe757 2256static inline bool ieee80211_is_tdls_setup(struct sk_buff *skb)
ad38bfc9 2257{
97ffe757 2258 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
ad38bfc9 2259
97ffe757
JB		 2260 return ethertype == ETH_P_TDLS &&
2261 skb->len > 14 &&
2262 skb->data[14] == WLAN_TDLS_SNAP_RFTYPE;
2263}
2264
2265static int ieee80211_lookup_ra_sta(struct ieee80211_sub_if_data *sdata,
2266 struct sk_buff *skb,
2267 struct sta_info **sta_out)
2268{
2269 struct sta_info *sta;
2270
2271 switch (sdata->vif.type) {
2272 case NL80211_IFTYPE_AP_VLAN:
2273 sta = rcu_dereference(sdata->u.vlan.sta);
2274 if (sta) {
2275 *sta_out = sta;
2276 return 0;
2277 } else if (sdata->wdev.use_4addr) {
2278 return -ENOLINK;
2279 }
2280 /* fall through */
2281 case NL80211_IFTYPE_AP:
2282 case NL80211_IFTYPE_OCB:
2283 case NL80211_IFTYPE_ADHOC:
2284 if (is_multicast_ether_addr(skb->data)) {
2285 *sta_out = ERR_PTR(-ENOENT);
2286 return 0;
2287 }
2288 sta = sta_info_get_bss(sdata, skb->data);
2289 break;
2290 case NL80211_IFTYPE_WDS:
2291 sta = sta_info_get(sdata, sdata->u.wds.remote_addr);
2292 break;
2293#ifdef CONFIG_MAC80211_MESH
2294 case NL80211_IFTYPE_MESH_POINT:
2295 /* determined much later */
2296 *sta_out = NULL;
2297 return 0;
2298#endif
2299 case NL80211_IFTYPE_STATION:
2300 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
2301 sta = sta_info_get(sdata, skb->data);
11d62caf
JB		 2302 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2303 if (test_sta_flag(sta,
2304 WLAN_STA_TDLS_PEER_AUTH)) {
97ffe757
JB		 2305 *sta_out = sta;
2306 return 0;
2307 }
2308
2309 /*
2310 * TDLS link during setup - throw out frames to
2311 * peer. Allow TDLS-setup frames to unauthorized
2312 * peers for the special case of a link teardown
2313 * after a TDLS sta is removed due to being
2314 * unreachable.
2315 */
11d62caf 2316 if (!ieee80211_is_tdls_setup(skb))
97ffe757
JB		 2317 return -EINVAL;
2318 }
2319
2320 }
2321
2322 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
2323 if (!sta)
2324 return -ENOLINK;
2325 break;
2326 default:
2327 return -EINVAL;
2328 }
2329
2330 *sta_out = sta ?: ERR_PTR(-ENOENT);
2331 return 0;
ad38bfc9
MG		 2332}
2333
e2ebc74d 2334/**
4c9451ed
JB		 2335 * ieee80211_build_hdr - build 802.11 header in the given frame
2336 * @sdata: virtual interface to build the header for
2337 * @skb: the skb to build the header in
24d342c5 2338 * @info_flags: skb flags to set
e2ebc74d 2339 *
4c9451ed
JB		 2340 * This function takes the skb with 802.3 header and reformats the header to
2341 * the appropriate IEEE 802.11 header based on which interface the packet is
2342 * being transmitted on.
2343 *
2344 * Note that this function also takes care of the TX status request and
2345 * potential unsharing of the SKB - this needs to be interleaved with the
2346 * header building.
e2ebc74d 2347 *
4c9451ed
JB		 2348 * The function requires the read-side RCU lock held
2349 *
2350 * Returns: the (possibly reallocated) skb or an ERR_PTR() code
e2ebc74d 2351 */
4c9451ed 2352static struct sk_buff *ieee80211_build_hdr(struct ieee80211_sub_if_data *sdata,
7c10770f 2353 struct sk_buff *skb, u32 info_flags,
97ffe757 2354 struct sta_info *sta)
e2ebc74d 2355{
133b8226 2356 struct ieee80211_local *local = sdata->local;
489ee919 2357 struct ieee80211_tx_info *info;
dcf33963 2358 int head_need;
065e9605
HH		 2359 u16 ethertype, hdrlen, meshhdrlen = 0;
2360 __le16 fc;
e2ebc74d 2361 struct ieee80211_hdr hdr;
ff67bb86 2362 struct ieee80211s_hdr mesh_hdr __maybe_unused;
b8bacc18 2363 struct mesh_path __maybe_unused *mppath = NULL, *mpath = NULL;
e2ebc74d
JB		 2364 const u8 *encaps_data;
2365 int encaps_len, skip_header_bytes;
97ffe757
JB		 2366 bool wme_sta = false, authorized = false;
2367 bool tdls_peer;
a729cff8 2368 bool multicast;
a729cff8 2369 u16 info_id = 0;
55de908a
JB		 2370 struct ieee80211_chanctx_conf *chanctx_conf;
2371 struct ieee80211_sub_if_data *ap_sdata;
57fbcce3 2372 enum nl80211_band band;
4c9451ed 2373 int ret;
e2ebc74d 2374
97ffe757
JB		 2375 if (IS_ERR(sta))
2376 sta = NULL;
2377
e2ebc74d
JB		 2378 /* convert Ethernet header to proper 802.11 header (based on
2379 * operation mode) */
2380 ethertype = (skb->data[12] << 8) | skb->data[13];
065e9605 2381 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
e2ebc74d 2382
51fb61e7 2383 switch (sdata->vif.type) {
05c914fe 2384 case NL80211_IFTYPE_AP_VLAN:
97ffe757 2385 if (sdata->wdev.use_4addr) {
f14543ee
FF		 2386 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
2387 /* RA TA DA SA */
2388 memcpy(hdr.addr1, sta->sta.addr, ETH_ALEN);
47846c9b 2389 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2390 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2391 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2392 hdrlen = 30;
c2c98fde 2393 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
a74a8c84 2394 wme_sta = sta->sta.wme;
f14543ee 2395 }
55de908a
JB		 2396 ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
2397 u.ap);
2398 chanctx_conf = rcu_dereference(ap_sdata->vif.chanctx_conf);
4c9451ed
JB		 2399 if (!chanctx_conf) {
2400 ret = -ENOTCONN;
2401 goto free;
2402 }
4bf88530 2403 band = chanctx_conf->def.chan->band;
97ffe757 2404 if (sdata->wdev.use_4addr)
f14543ee
FF		 2405 break;
2406 /* fall through */
2407 case NL80211_IFTYPE_AP:
fe80123d
AB		 2408 if (sdata->vif.type == NL80211_IFTYPE_AP)
2409 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2410 if (!chanctx_conf) {
2411 ret = -ENOTCONN;
2412 goto free;
2413 }
065e9605 2414 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
e2ebc74d
JB		 2415 /* DA BSSID SA */
2416 memcpy(hdr.addr1, skb->data, ETH_ALEN);
47846c9b 2417 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2418 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
2419 hdrlen = 24;
4bf88530 2420 band = chanctx_conf->def.chan->band;
cf966838 2421 break;
05c914fe 2422 case NL80211_IFTYPE_WDS:
065e9605 2423 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
e2ebc74d
JB		 2424 /* RA TA DA SA */
2425 memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN);
47846c9b 2426 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
e2ebc74d
JB		 2427 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2428 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2429 hdrlen = 30;
55de908a
JB		 2430 /*
2431 * This is the exception! WDS style interfaces are prohibited
2432 * when channel contexts are in used so this must be valid
2433 */
675a0b04 2434 band = local->hw.conf.chandef.chan->band;
cf966838 2435 break;
33b64eb2 2436#ifdef CONFIG_MAC80211_MESH
05c914fe 2437 case NL80211_IFTYPE_MESH_POINT:
b8bacc18 2438 if (!is_multicast_ether_addr(skb->data)) {
163df6cf
CYY		 2439 struct sta_info *next_hop;
2440 bool mpp_lookup = true;
2441
bf7cd94d 2442 mpath = mesh_path_lookup(sdata, skb->data);
163df6cf
CYY		 2443 if (mpath) {
2444 mpp_lookup = false;
2445 next_hop = rcu_dereference(mpath->next_hop);
2446 if (!next_hop ||
2447 !(mpath->flags & (MESH_PATH_ACTIVE |
2448 MESH_PATH_RESOLVING)))
2449 mpp_lookup = true;
2450 }
2451
ab1c7906 2452 if (mpp_lookup) {
bf7cd94d 2453 mppath = mpp_path_lookup(sdata, skb->data);
ab1c7906
HR		 2454 if (mppath)
2455 mppath->exp_time = jiffies;
2456 }
163df6cf
CYY		 2457
2458 if (mppath && mpath)
2bdaf386 2459 mesh_path_del(sdata, mpath->dst);
b8bacc18 2460 }
79617dee 2461
f76b57b4 2462 /*
9d52501b
JF		 2463 * Use address extension if it is a packet from
2464 * another interface or if we know the destination
2465 * is being proxied by a portal (i.e. portal address
2466 * differs from proxied address)
f76b57b4 2467 */
b203ca39
JP		 2468 if (ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN) &&
2469 !(mppath && !ether_addr_equal(mppath->mpp, skb->data))) {
3c5772a5
JC		 2470 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
2471 skb->data, skb->data + ETH_ALEN);
bf7cd94d
JB		 2472 meshhdrlen = ieee80211_new_mesh_header(sdata, &mesh_hdr,
2473 NULL, NULL);
79617dee 2474 } else {
27f01124
TP		 2475 /* DS -> MBSS (802.11-2012 13.11.3.3).
2476 * For unicast with unknown forwarding information,
2477 * destination might be in the MBSS or if that fails
2478 * forwarded to another mesh gate. In either case
2479 * resolution will be handled in ieee80211_xmit(), so
2480 * leave the original DA. This also works for mcast */
2481 const u8 *mesh_da = skb->data;
2482
2483 if (mppath)
2484 mesh_da = mppath->mpp;
2485 else if (mpath)
2486 mesh_da = mpath->dst;
79617dee 2487
3c5772a5 2488 hdrlen = ieee80211_fill_mesh_addresses(&hdr, &fc,
47846c9b 2489 mesh_da, sdata->vif.addr);
27f01124
TP		 2490 if (is_multicast_ether_addr(mesh_da))
2491 /* DA TA mSA AE:SA */
bf7cd94d
JB		 2492 meshhdrlen = ieee80211_new_mesh_header(
2493 sdata, &mesh_hdr,
2494 skb->data + ETH_ALEN, NULL);
3c5772a5 2495 else
27f01124 2496 /* RA TA mDA mSA AE:DA SA */
bf7cd94d
JB		 2497 meshhdrlen = ieee80211_new_mesh_header(
2498 sdata, &mesh_hdr, skb->data,
2499 skb->data + ETH_ALEN);
79617dee 2500
79617dee 2501 }
55de908a 2502 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2503 if (!chanctx_conf) {
2504 ret = -ENOTCONN;
2505 goto free;
2506 }
4bf88530 2507 band = chanctx_conf->def.chan->band;
33b64eb2
LCC		 2508 break;
2509#endif
05c914fe 2510 case NL80211_IFTYPE_STATION:
97ffe757
JB		 2511 /* we already did checks when looking up the RA STA */
2512 tdls_peer = test_sta_flag(sta, WLAN_STA_TDLS_PEER);
941c93cd 2513
97ffe757 2514 if (tdls_peer) {
941c93cd
AN		 2515 /* DA SA BSSID */
2516 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2517 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2518 memcpy(hdr.addr3, sdata->u.mgd.bssid, ETH_ALEN);
2519 hdrlen = 24;
2520 } else if (sdata->u.mgd.use_4addr &&
2521 cpu_to_be16(ethertype) != sdata->control_port_protocol) {
2522 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2523 IEEE80211_FCTL_TODS);
f14543ee 2524 /* RA TA DA SA */
941c93cd 2525 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
47846c9b 2526 memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
f14543ee
FF		 2527 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2528 memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
2529 hdrlen = 30;
2530 } else {
2531 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2532 /* BSSID SA DA */
941c93cd 2533 memcpy(hdr.addr1, sdata->u.mgd.bssid, ETH_ALEN);
f14543ee
FF		 2534 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2535 memcpy(hdr.addr3, skb->data, ETH_ALEN);
2536 hdrlen = 24;
2537 }
55de908a 2538 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2539 if (!chanctx_conf) {
2540 ret = -ENOTCONN;
2541 goto free;
2542 }
4bf88530 2543 band = chanctx_conf->def.chan->band;
cf966838 2544 break;
239281f8
RL		 2545 case NL80211_IFTYPE_OCB:
2546 /* DA SA BSSID */
2547 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2548 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
2549 eth_broadcast_addr(hdr.addr3);
2550 hdrlen = 24;
2551 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2552 if (!chanctx_conf) {
2553 ret = -ENOTCONN;
2554 goto free;
2555 }
239281f8
RL		 2556 band = chanctx_conf->def.chan->band;
2557 break;
05c914fe 2558 case NL80211_IFTYPE_ADHOC:
e2ebc74d
JB		 2559 /* DA SA BSSID */
2560 memcpy(hdr.addr1, skb->data, ETH_ALEN);
2561 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN);
46900298 2562 memcpy(hdr.addr3, sdata->u.ibss.bssid, ETH_ALEN);
e2ebc74d 2563 hdrlen = 24;
55de908a 2564 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
4c9451ed
JB		 2565 if (!chanctx_conf) {
2566 ret = -ENOTCONN;
2567 goto free;
2568 }
4bf88530 2569 band = chanctx_conf->def.chan->band;
cf966838
JB		 2570 break;
2571 default:
4c9451ed
JB		 2572 ret = -EINVAL;
2573 goto free;
e2ebc74d
JB		 2574 }
2575
a729cff8 2576 multicast = is_multicast_ether_addr(hdr.addr1);
e2ebc74d 2577
97ffe757
JB		 2578 /* sta is always NULL for mesh */
2579 if (sta) {
2580 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
2581 wme_sta = sta->sta.wme;
2582 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
2583 /* For mesh, the use of the QoS header is mandatory */
c2c98fde 2584 wme_sta = true;
97ffe757 2585 }
4777be41 2586
527871d7
JB		 2587 /* receiver does QoS (which also means we do) use it */
2588 if (wme_sta) {
065e9605 2589 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
ce3edf6d
JB		 2590 hdrlen += 2;
2591 }
2592
2593 /*
238814fd
JB		 2594 * Drop unicast frames to unauthorised stations unless they are
2595 * EAPOL frames from the local station.
ce3edf6d 2596 */
55182e4a 2597 if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
239281f8 2598 (sdata->vif.type != NL80211_IFTYPE_OCB) &&
a6ececf4 2599 !multicast && !authorized &&
55182e4a 2600 (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
b203ca39 2601 !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
ce3edf6d 2602#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
bdcbd8e0 2603 net_info_ratelimited("%s: dropped frame to %pM (unauthorized port)\n",
4c9451ed 2604 sdata->name, hdr.addr1);
ce3edf6d
JB		 2605#endif
2606
2607 I802_DEBUG_INC(local->tx_handlers_drop_unauth_port);
2608
4c9451ed
JB		 2609 ret = -EPERM;
2610 goto free;
ce3edf6d
JB		 2611 }
2612
a729cff8
JB		 2613 if (unlikely(!multicast && skb->sk &&
2614 skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)) {
bf7fa551 2615 struct sk_buff *ack_skb = skb_clone_sk(skb);
a729cff8 2616
bf7fa551 2617 if (ack_skb) {
a729cff8 2618 unsigned long flags;
9475af6e 2619 int id;
a729cff8
JB		 2620
2621 spin_lock_irqsave(&local->ack_status_lock, flags);
bf7fa551 2622 id = idr_alloc(&local->ack_status_frames, ack_skb,
9475af6e 2623 1, 0x10000, GFP_ATOMIC);
a729cff8
JB		 2624 spin_unlock_irqrestore(&local->ack_status_lock, flags);
2625
9475af6e 2626 if (id >= 0) {
a729cff8
JB		 2627 info_id = id;
2628 info_flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
a729cff8 2629 } else {
bf7fa551 2630 kfree_skb(ack_skb);
a729cff8 2631 }
a729cff8
JB		 2632 }
2633 }
2634
7e244707
HS		 2635 /*
2636 * If the skb is shared we need to obtain our own copy.
2637 */
2638 if (skb_shared(skb)) {
a729cff8
JB		 2639 struct sk_buff *tmp_skb = skb;
2640
2641 /* can't happen -- skb is a clone if info_id != 0 */
2642 WARN_ON(info_id);
2643
f8a0a781 2644 skb = skb_clone(skb, GFP_ATOMIC);
7e244707
HS		 2645 kfree_skb(tmp_skb);
2646
4c9451ed
JB		 2647 if (!skb) {
2648 ret = -ENOMEM;
2649 goto free;
2650 }
7e244707
HS		 2651 }
2652
065e9605 2653 hdr.frame_control = fc;
e2ebc74d
JB		 2654 hdr.duration_id = 0;
2655 hdr.seq_ctrl = 0;
2656
2657 skip_header_bytes = ETH_HLEN;
2658 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) {
2659 encaps_data = bridge_tunnel_header;
2660 encaps_len = sizeof(bridge_tunnel_header);
2661 skip_header_bytes -= 2;
e5c5d22e 2662 } else if (ethertype >= ETH_P_802_3_MIN) {
e2ebc74d
JB		 2663 encaps_data = rfc1042_header;
2664 encaps_len = sizeof(rfc1042_header);
2665 skip_header_bytes -= 2;
2666 } else {
2667 encaps_data = NULL;
2668 encaps_len = 0;
2669 }
2670
2671 skb_pull(skb, skip_header_bytes);
23c0752a 2672 head_need = hdrlen + encaps_len + meshhdrlen - skb_headroom(skb);
e2ebc74d 2673
23c0752a
JB		 2674 /*
2675 * So we need to modify the skb header and hence need a copy of
2676 * that. The head_need variable above doesn't, so far, include
2677 * the needed header space that we don't need right away. If we
2678 * can, then we don't reallocate right now but only after the
2679 * frame arrives at the master device (if it does...)
2680 *
2681 * If we cannot, however, then we will reallocate to include all
2682 * the ever needed space. Also, if we need to reallocate it anyway,
2683 * make it big enough for everything we may ever need.
2684 */
e2ebc74d 2685
3a5be7d4 2686 if (head_need > 0 || skb_cloned(skb)) {
2475b1cc 2687 head_need += sdata->encrypt_headroom;
23c0752a
JB		 2688 head_need += local->tx_headroom;
2689 head_need = max_t(int, 0, head_need);
c3e7724b
FF		 2690 if (ieee80211_skb_resize(sdata, skb, head_need, true)) {
2691 ieee80211_free_txskb(&local->hw, skb);
1c963bec 2692 skb = NULL;
4c9451ed 2693 return ERR_PTR(-ENOMEM);
c3e7724b 2694 }
e2ebc74d
JB		 2695 }
2696
eae4430e 2697 if (encaps_data)
e2ebc74d 2698 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len);
c29b9b9b 2699
e4ab7eb0 2700#ifdef CONFIG_MAC80211_MESH
eae4430e 2701 if (meshhdrlen > 0)
33b64eb2 2702 memcpy(skb_push(skb, meshhdrlen), &mesh_hdr, meshhdrlen);
e4ab7eb0 2703#endif
33b64eb2 2704
065e9605 2705 if (ieee80211_is_data_qos(fc)) {
c29b9b9b
JB		 2706 __le16 *qos_control;
2707
f359d3fe 2708 qos_control = (__le16 *) skb_push(skb, 2);
c29b9b9b
JB		 2709 memcpy(skb_push(skb, hdrlen - 2), &hdr, hdrlen - 2);
2710 /*
2711 * Maybe we could actually set some fields here, for now just
2712 * initialise to zero to indicate no special operation.
2713 */
2714 *qos_control = 0;
2715 } else
2716 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen);
2717
d57a544d 2718 skb_reset_mac_header(skb);
e2ebc74d 2719
489ee919 2720 info = IEEE80211_SKB_CB(skb);
3b8d81e0
JB		 2721 memset(info, 0, sizeof(*info));
2722
a729cff8
JB		 2723 info->flags = info_flags;
2724 info->ack_frame_id = info_id;
73c4e195 2725 info->band = band;
a729cff8 2726
4c9451ed
JB		 2727 return skb;
2728 free:
2729 kfree_skb(skb);
2730 return ERR_PTR(ret);
2731}
2732
17c18bf8
JB		 2733/*
2734 * fast-xmit overview
2735 *
2736 * The core idea of this fast-xmit is to remove per-packet checks by checking
2737 * them out of band. ieee80211_check_fast_xmit() implements the out-of-band
2738 * checks that are needed to get the sta->fast_tx pointer assigned, after which
2739 * much less work can be done per packet. For example, fragmentation must be
2740 * disabled or the fast_tx pointer will not be set. All the conditions are seen
2741 * in the code here.
2742 *
2743 * Once assigned, the fast_tx data structure also caches the per-packet 802.11
2744 * header and other data to aid packet processing in ieee80211_xmit_fast().
2745 *
2746 * The most difficult part of this is that when any of these assumptions
2747 * change, an external trigger (i.e. a call to ieee80211_clear_fast_xmit(),
2748 * ieee80211_check_fast_xmit() or friends) is required to reset the data,
2749 * since the per-packet code no longer checks the conditions. This is reflected
2750 * by the calls to these functions throughout the rest of the code, and must be
2751 * maintained if any of the TX path checks change.
2752 */
2753
2754void ieee80211_check_fast_xmit(struct sta_info *sta)
2755{
2756 struct ieee80211_fast_tx build = {}, *fast_tx = NULL, *old;
2757 struct ieee80211_local *local = sta->local;
2758 struct ieee80211_sub_if_data *sdata = sta->sdata;
2759 struct ieee80211_hdr *hdr = (void *)build.hdr;
2760 struct ieee80211_chanctx_conf *chanctx_conf;
2761 __le16 fc;
2762
30686bf7 2763 if (!ieee80211_hw_check(&local->hw, SUPPORT_FAST_XMIT))
17c18bf8
JB		 2764 return;
2765
2766 /* Locking here protects both the pointer itself, and against concurrent
2767 * invocations winning data access races to, e.g., the key pointer that
2768 * is used.
2769 * Without it, the invocation of this function right after the key
2770 * pointer changes wouldn't be sufficient, as another CPU could access
2771 * the pointer, then stall, and then do the cache update after the CPU
2772 * that invalidated the key.
2773 * With the locking, such scenarios cannot happen as the check for the
2774 * key and the fast-tx assignment are done atomically, so the CPU that
2775 * modifies the key will either wait or other one will see the key
2776 * cleared/changed already.
2777 */
2778 spin_lock_bh(&sta->lock);
30686bf7
JB		 2779 if (ieee80211_hw_check(&local->hw, SUPPORTS_PS) &&
2780 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS) &&
17c18bf8
JB		 2781 sdata->vif.type == NL80211_IFTYPE_STATION)
2782 goto out;
2783
2784 if (!test_sta_flag(sta, WLAN_STA_AUTHORIZED))
2785 goto out;
2786
2787 if (test_sta_flag(sta, WLAN_STA_PS_STA) ||
2788 test_sta_flag(sta, WLAN_STA_PS_DRIVER) ||
f7418bc1
FF		 2789 test_sta_flag(sta, WLAN_STA_PS_DELIVER) ||
2790 test_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT))
17c18bf8
JB		 2791 goto out;
2792
2793 if (sdata->noack_map)
2794 goto out;
2795
2796 /* fast-xmit doesn't handle fragmentation at all */
725b812c 2797 if (local->hw.wiphy->frag_threshold != (u32)-1 &&
f3fe4e93 2798 !ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG))
17c18bf8
JB		 2799 goto out;
2800
2801 rcu_read_lock();
2802 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2803 if (!chanctx_conf) {
2804 rcu_read_unlock();
2805 goto out;
2806 }
2807 build.band = chanctx_conf->def.chan->band;
2808 rcu_read_unlock();
2809
2810 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA);
2811
2812 switch (sdata->vif.type) {
3ffd8840
JB		 2813 case NL80211_IFTYPE_ADHOC:
2814 /* DA SA BSSID */
2815 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2816 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2817 memcpy(hdr->addr3, sdata->u.ibss.bssid, ETH_ALEN);
2818 build.hdr_len = 24;
2819 break;
17c18bf8
JB		 2820 case NL80211_IFTYPE_STATION:
2821 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
2822 /* DA SA BSSID */
2823 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2824 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2825 memcpy(hdr->addr3, sdata->u.mgd.bssid, ETH_ALEN);
2826 build.hdr_len = 24;
2827 break;
2828 }
2829
2830 if (sdata->u.mgd.use_4addr) {
2831 /* non-regular ethertype cannot use the fastpath */
2832 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2833 IEEE80211_FCTL_TODS);
2834 /* RA TA DA SA */
2835 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2836 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2837 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2838 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2839 build.hdr_len = 30;
2840 break;
2841 }
2842 fc |= cpu_to_le16(IEEE80211_FCTL_TODS);
2843 /* BSSID SA DA */
2844 memcpy(hdr->addr1, sdata->u.mgd.bssid, ETH_ALEN);
2845 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2846 build.sa_offs = offsetof(struct ieee80211_hdr, addr2);
2847 build.hdr_len = 24;
2848 break;
2849 case NL80211_IFTYPE_AP_VLAN:
2850 if (sdata->wdev.use_4addr) {
2851 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS |
2852 IEEE80211_FCTL_TODS);
2853 /* RA TA DA SA */
2854 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
2855 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2856 build.da_offs = offsetof(struct ieee80211_hdr, addr3);
2857 build.sa_offs = offsetof(struct ieee80211_hdr, addr4);
2858 build.hdr_len = 30;
2859 break;
2860 }
2861 /* fall through */
2862 case NL80211_IFTYPE_AP:
2863 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
2864 /* DA BSSID SA */
2865 build.da_offs = offsetof(struct ieee80211_hdr, addr1);
2866 memcpy(hdr->addr2, sdata->vif.addr, ETH_ALEN);
2867 build.sa_offs = offsetof(struct ieee80211_hdr, addr3);
2868 build.hdr_len = 24;
2869 break;
2870 default:
2871 /* not handled on fast-xmit */
2872 goto out;
2873 }
2874
2875 if (sta->sta.wme) {
2876 build.hdr_len += 2;
2877 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
2878 }
2879
2880 /* We store the key here so there's no point in using rcu_dereference()
2881 * but that's fine because the code that changes the pointers will call
2882 * this function after doing so. For a single CPU that would be enough,
2883 * for multiple see the comment above.
2884 */
2885 build.key = rcu_access_pointer(sta->ptk[sta->ptk_idx]);
2886 if (!build.key)
2887 build.key = rcu_access_pointer(sdata->default_unicast_key);
2888 if (build.key) {
e495c247 2889 bool gen_iv, iv_spc, mmic;
17c18bf8
JB		 2890
2891 gen_iv = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV;
2892 iv_spc = build.key->conf.flags & IEEE80211_KEY_FLAG_PUT_IV_SPACE;
e495c247 2893 mmic = build.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIC;
17c18bf8
JB		 2894
2895 /* don't handle software crypto */
2896 if (!(build.key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE))
2897 goto out;
2898
2899 switch (build.key->conf.cipher) {
2900 case WLAN_CIPHER_SUITE_CCMP:
2901 case WLAN_CIPHER_SUITE_CCMP_256:
2902 /* add fixed key ID */
2903 if (gen_iv) {
2904 (build.hdr + build.hdr_len)[3] =
2905 0x20 | (build.key->conf.keyidx << 6);
2906 build.pn_offs = build.hdr_len;
2907 }
2908 if (gen_iv || iv_spc)
2909 build.hdr_len += IEEE80211_CCMP_HDR_LEN;
2910 break;
2911 case WLAN_CIPHER_SUITE_GCMP:
2912 case WLAN_CIPHER_SUITE_GCMP_256:
2913 /* add fixed key ID */
2914 if (gen_iv) {
2915 (build.hdr + build.hdr_len)[3] =
2916 0x20 | (build.key->conf.keyidx << 6);
2917 build.pn_offs = build.hdr_len;
2918 }
2919 if (gen_iv || iv_spc)
2920 build.hdr_len += IEEE80211_GCMP_HDR_LEN;
2921 break;
e495c247
JB		 2922 case WLAN_CIPHER_SUITE_TKIP:
2923 /* cannot handle MMIC or IV generation in xmit-fast */
2924 if (mmic || gen_iv)
2925 goto out;
2926 if (iv_spc)
2927 build.hdr_len += IEEE80211_TKIP_IV_LEN;
2928 break;
2929 case WLAN_CIPHER_SUITE_WEP40:
2930 case WLAN_CIPHER_SUITE_WEP104:
2931 /* cannot handle IV generation in fast-xmit */
2932 if (gen_iv)
2933 goto out;
2934 if (iv_spc)
2935 build.hdr_len += IEEE80211_WEP_IV_LEN;
2936 break;
2937 case WLAN_CIPHER_SUITE_AES_CMAC:
2938 case WLAN_CIPHER_SUITE_BIP_CMAC_256:
2939 case WLAN_CIPHER_SUITE_BIP_GMAC_128:
2940 case WLAN_CIPHER_SUITE_BIP_GMAC_256:
2941 WARN(1,
2942 "management cipher suite 0x%x enabled for data\n",
2943 build.key->conf.cipher);
17c18bf8 2944 goto out;
e495c247
JB		 2945 default:
2946 /* we don't know how to generate IVs for this at all */
2947 if (WARN_ON(gen_iv))
2948 goto out;
2949 /* pure hardware keys are OK, of course */
2950 if (!(build.key->flags & KEY_FLAG_CIPHER_SCHEME))
2951 break;
2952 /* cipher scheme might require space allocation */
2953 if (iv_spc &&
2954 build.key->conf.iv_len > IEEE80211_FAST_XMIT_MAX_IV)
2955 goto out;
2956 if (iv_spc)
2957 build.hdr_len += build.key->conf.iv_len;
17c18bf8
JB		 2958 }
2959
2960 fc |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2961 }
2962
2963 hdr->frame_control = fc;
2964
2965 memcpy(build.hdr + build.hdr_len,
2966 rfc1042_header, sizeof(rfc1042_header));
2967 build.hdr_len += sizeof(rfc1042_header);
2968
2969 fast_tx = kmemdup(&build, sizeof(build), GFP_ATOMIC);
2970 /* if the kmemdup fails, continue w/o fast_tx */
2971 if (!fast_tx)
2972 goto out;
2973
2974 out:
2975 /* we might have raced against another call to this function */
2976 old = rcu_dereference_protected(sta->fast_tx,
2977 lockdep_is_held(&sta->lock));
2978 rcu_assign_pointer(sta->fast_tx, fast_tx);
2979 if (old)
2980 kfree_rcu(old, rcu_head);
2981 spin_unlock_bh(&sta->lock);
2982}
2983
2984void ieee80211_check_fast_xmit_all(struct ieee80211_local *local)
2985{
2986 struct sta_info *sta;
2987
2988 rcu_read_lock();
2989 list_for_each_entry_rcu(sta, &local->sta_list, list)
2990 ieee80211_check_fast_xmit(sta);
2991 rcu_read_unlock();
2992}
2993
2994void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata)
2995{
2996 struct ieee80211_local *local = sdata->local;
2997 struct sta_info *sta;
2998
2999 rcu_read_lock();
3000
3001 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3002 if (sdata != sta->sdata &&
3003 (!sta->sdata->bss || sta->sdata->bss != sdata->bss))
3004 continue;
3005 ieee80211_check_fast_xmit(sta);
3006 }
3007
3008 rcu_read_unlock();
3009}
3010
3011void ieee80211_clear_fast_xmit(struct sta_info *sta)
3012{
3013 struct ieee80211_fast_tx *fast_tx;
3014
3015 spin_lock_bh(&sta->lock);
3016 fast_tx = rcu_dereference_protected(sta->fast_tx,
3017 lockdep_is_held(&sta->lock));
3018 RCU_INIT_POINTER(sta->fast_tx, NULL);
3019 spin_unlock_bh(&sta->lock);
3020
3021 if (fast_tx)
3022 kfree_rcu(fast_tx, rcu_head);
3023}
3024
6e0456b5
FF		 3025static bool ieee80211_amsdu_realloc_pad(struct ieee80211_local *local,
3026 struct sk_buff *skb, int headroom,
3027 int *subframe_len)
3028{
3029 int amsdu_len = *subframe_len + sizeof(struct ethhdr);
3030 int padding = (4 - amsdu_len) & 3;
3031
3032 if (skb_headroom(skb) < headroom || skb_tailroom(skb) < padding) {
3033 I802_DEBUG_INC(local->tx_expand_skb_head);
3034
3035 if (pskb_expand_head(skb, headroom, padding, GFP_ATOMIC)) {
3036 wiphy_debug(local->hw.wiphy,
3037 "failed to reallocate TX buffer\n");
3038 return false;
3039 }
3040 }
3041
3042 if (padding) {
3043 *subframe_len += padding;
3044 memset(skb_put(skb, padding), 0, padding);
3045 }
3046
3047 return true;
3048}
3049
3050static bool ieee80211_amsdu_prepare_head(struct ieee80211_sub_if_data *sdata,
3051 struct ieee80211_fast_tx *fast_tx,
3052 struct sk_buff *skb)
3053{
3054 struct ieee80211_local *local = sdata->local;
3055 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3056 struct ieee80211_hdr *hdr;
06f2bb1e 3057 struct ethhdr *amsdu_hdr;
6e0456b5
FF		 3058 int hdr_len = fast_tx->hdr_len - sizeof(rfc1042_header);
3059 int subframe_len = skb->len - hdr_len;
3060 void *data;
06f2bb1e 3061 u8 *qc, *h_80211_src, *h_80211_dst;
a3e2f4b6 3062 const u8 *bssid;
6e0456b5
FF		 3063
3064 if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)
3065 return false;
3066
3067 if (info->control.flags & IEEE80211_TX_CTRL_AMSDU)
3068 return true;
3069
06f2bb1e 3070 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(*amsdu_hdr),
6e0456b5
FF		 3071 &subframe_len))
3072 return false;
3073
06f2bb1e
MB		 3074 data = skb_push(skb, sizeof(*amsdu_hdr));
3075 memmove(data, data + sizeof(*amsdu_hdr), hdr_len);
3076 hdr = data;
3077 amsdu_hdr = data + hdr_len;
3078 /* h_80211_src/dst is addr* field within hdr */
3079 h_80211_src = data + fast_tx->sa_offs;
3080 h_80211_dst = data + fast_tx->da_offs;
6e0456b5 3081
06f2bb1e
MB		 3082 amsdu_hdr->h_proto = cpu_to_be16(subframe_len);
3083 ether_addr_copy(amsdu_hdr->h_source, h_80211_src);
3084 ether_addr_copy(amsdu_hdr->h_dest, h_80211_dst);
6e0456b5 3085
a3e2f4b6
MB		 3086 /* according to IEEE 802.11-2012 8.3.2 table 8-19, the outer SA/DA
3087 * fields needs to be changed to BSSID for A-MSDU frames depending
3088 * on FromDS/ToDS values.
3089 */
3090 switch (sdata->vif.type) {
3091 case NL80211_IFTYPE_STATION:
3092 bssid = sdata->u.mgd.bssid;
3093 break;
3094 case NL80211_IFTYPE_AP:
3095 case NL80211_IFTYPE_AP_VLAN:
3096 bssid = sdata->vif.addr;
3097 break;
3098 default:
3099 bssid = NULL;
3100 }
3101
3102 if (bssid && ieee80211_has_fromds(hdr->frame_control))
3103 ether_addr_copy(h_80211_src, bssid);
3104
3105 if (bssid && ieee80211_has_tods(hdr->frame_control))
3106 ether_addr_copy(h_80211_dst, bssid);
3107
6e0456b5
FF		 3108 qc = ieee80211_get_qos_ctl(hdr);
3109 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
3110
3111 info->control.flags |= IEEE80211_TX_CTRL_AMSDU;
3112
3113 return true;
3114}
3115
3116static bool ieee80211_amsdu_aggregate(struct ieee80211_sub_if_data *sdata,
3117 struct sta_info *sta,
3118 struct ieee80211_fast_tx *fast_tx,
3119 struct sk_buff *skb)
3120{
3121 struct ieee80211_local *local = sdata->local;
fa962b92
MK		 3122 struct fq *fq = &local->fq;
3123 struct fq_tin *tin;
3124 struct fq_flow *flow;
6e0456b5
FF		 3125 u8 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3126 struct ieee80211_txq *txq = sta->sta.txq[tid];
3127 struct txq_info *txqi;
3128 struct sk_buff **frag_tail, *head;
3129 int subframe_len = skb->len - ETH_ALEN;
3130 u8 max_subframes = sta->sta.max_amsdu_subframes;
3131 int max_frags = local->hw.max_tx_fragments;
3132 int max_amsdu_len = sta->sta.max_amsdu_len;
3133 __be16 len;
3134 void *data;
3135 bool ret = false;
fa962b92 3136 unsigned int orig_len;
6e0456b5
FF		 3137 int n = 1, nfrags;
3138
3139 if (!ieee80211_hw_check(&local->hw, TX_AMSDU))
3140 return false;
3141
3142 if (!txq)
3143 return false;
3144
3145 txqi = to_txq_info(txq);
3146 if (test_bit(IEEE80211_TXQ_NO_AMSDU, &txqi->flags))
3147 return false;
3148
3149 if (sta->sta.max_rc_amsdu_len)
3150 max_amsdu_len = min_t(int, max_amsdu_len,
3151 sta->sta.max_rc_amsdu_len);
3152
fa962b92 3153 spin_lock_bh(&fq->lock);
6e0456b5 3154
fa962b92
MK		 3155 /* TODO: Ideally aggregation should be done on dequeue to remain
3156 * responsive to environment changes.
3157 */
3158
3159 tin = &txqi->tin;
3160 flow = fq_flow_classify(fq, tin, skb, fq_flow_get_default_func);
3161 head = skb_peek_tail(&flow->queue);
6e0456b5
FF		 3162 if (!head)
3163 goto out;
3164
fa962b92
MK		 3165 orig_len = head->len;
3166
6e0456b5
FF		 3167 if (skb->len + head->len > max_amsdu_len)
3168 goto out;
3169
3170 if (!ieee80211_amsdu_prepare_head(sdata, fast_tx, head))
3171 goto out;
3172
3173 nfrags = 1 + skb_shinfo(skb)->nr_frags;
3174 nfrags += 1 + skb_shinfo(head)->nr_frags;
3175 frag_tail = &skb_shinfo(head)->frag_list;
3176 while (*frag_tail) {
3177 nfrags += 1 + skb_shinfo(*frag_tail)->nr_frags;
3178 frag_tail = &(*frag_tail)->next;
3179 n++;
3180 }
3181
3182 if (max_subframes && n > max_subframes)
3183 goto out;
3184
3185 if (max_frags && nfrags > max_frags)
3186 goto out;
3187
3188 if (!ieee80211_amsdu_realloc_pad(local, skb, sizeof(rfc1042_header) + 2,
3189 &subframe_len))
3190 goto out;
3191
3192 ret = true;
3193 data = skb_push(skb, ETH_ALEN + 2);
3194 memmove(data, data + ETH_ALEN + 2, 2 * ETH_ALEN);
3195
3196 data += 2 * ETH_ALEN;
3197 len = cpu_to_be16(subframe_len);
3198 memcpy(data, &len, 2);
3199 memcpy(data + 2, rfc1042_header, sizeof(rfc1042_header));
3200
3201 head->len += skb->len;
3202 head->data_len += skb->len;
3203 *frag_tail = skb;
3204
fa962b92
MK		 3205 flow->backlog += head->len - orig_len;
3206 tin->backlog_bytes += head->len - orig_len;
3207
3208 fq_recalc_backlog(fq, tin, flow);
3209
6e0456b5 3210out:
fa962b92 3211 spin_unlock_bh(&fq->lock);
6e0456b5
FF		 3212
3213 return ret;
3214}
3215
bb42f2d1
THJ		 3216/*
3217 * Can be called while the sta lock is held. Anything that can cause packets to
3218 * be generated will cause deadlock!
3219 */
3220static void ieee80211_xmit_fast_finish(struct ieee80211_sub_if_data *sdata,
3221 struct sta_info *sta, u8 pn_offs,
3222 struct ieee80211_key *key,
3223 struct sk_buff *skb)
3224{
3225 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3226 struct ieee80211_hdr *hdr = (void *)skb->data;
3227 u8 tid = IEEE80211_NUM_TIDS;
3228
3229 if (key)
3230 info->control.hw_key = &key->conf;
3231
3232 ieee80211_tx_stats(skb->dev, skb->len);
3233
3234 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3235 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
bb42f2d1
THJ		 3236 hdr->seq_ctrl = ieee80211_tx_next_seq(sta, tid);
3237 } else {
3238 info->flags |= IEEE80211_TX_CTL_ASSIGN_SEQ;
3239 hdr->seq_ctrl = cpu_to_le16(sdata->sequence_number);
3240 sdata->sequence_number += 0x10;
3241 }
3242
3243 if (skb_shinfo(skb)->gso_size)
3244 sta->tx_stats.msdu[tid] +=
3245 DIV_ROUND_UP(skb->len, skb_shinfo(skb)->gso_size);
3246 else
3247 sta->tx_stats.msdu[tid]++;
3248
3249 info->hw_queue = sdata->vif.hw_queue[skb_get_queue_mapping(skb)];
3250
3251 /* statistics normally done by ieee80211_tx_h_stats (but that
3252 * has to consider fragmentation, so is more complex)
3253 */
3254 sta->tx_stats.bytes[skb_get_queue_mapping(skb)] += skb->len;
3255 sta->tx_stats.packets[skb_get_queue_mapping(skb)]++;
3256
3257 if (pn_offs) {
3258 u64 pn;
3259 u8 *crypto_hdr = skb->data + pn_offs;
3260
3261 switch (key->conf.cipher) {
3262 case WLAN_CIPHER_SUITE_CCMP:
3263 case WLAN_CIPHER_SUITE_CCMP_256:
3264 case WLAN_CIPHER_SUITE_GCMP:
3265 case WLAN_CIPHER_SUITE_GCMP_256:
3266 pn = atomic64_inc_return(&key->conf.tx_pn);
3267 crypto_hdr[0] = pn;
3268 crypto_hdr[1] = pn >> 8;
3269 crypto_hdr[4] = pn >> 16;
3270 crypto_hdr[5] = pn >> 24;
3271 crypto_hdr[6] = pn >> 32;
3272 crypto_hdr[7] = pn >> 40;
3273 break;
3274 }
3275 }
3276}
3277
17c18bf8 3278static bool ieee80211_xmit_fast(struct ieee80211_sub_if_data *sdata,
bb42f2d1 3279 struct sta_info *sta,
17c18bf8
JB		 3280 struct ieee80211_fast_tx *fast_tx,
3281 struct sk_buff *skb)
3282{
3283 struct ieee80211_local *local = sdata->local;
3284 u16 ethertype = (skb->data[12] << 8) | skb->data[13];
3285 int extra_head = fast_tx->hdr_len - (ETH_HLEN - 2);
3286 int hw_headroom = sdata->local->hw.extra_tx_headroom;
3287 struct ethhdr eth;
35f432a0 3288 struct ieee80211_tx_info *info;
17c18bf8
JB		 3289 struct ieee80211_hdr *hdr = (void *)fast_tx->hdr;
3290 struct ieee80211_tx_data tx;
3291 ieee80211_tx_result r;
3292 struct tid_ampdu_tx *tid_tx = NULL;
3293 u8 tid = IEEE80211_NUM_TIDS;
3294
3295 /* control port protocol needs a lot of special handling */
3296 if (cpu_to_be16(ethertype) == sdata->control_port_protocol)
3297 return false;
3298
3299 /* only RFC 1042 SNAP */
3300 if (ethertype < ETH_P_802_3_MIN)
3301 return false;
3302
3303 /* don't handle TX status request here either */
3304 if (skb->sk && skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS)
3305 return false;
3306
3307 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3308 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3309 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
472be00d
JB		 3310 if (tid_tx) {
3311 if (!test_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state))
3312 return false;
3313 if (tid_tx->timeout)
3314 tid_tx->last_tx = jiffies;
3315 }
17c18bf8
JB		 3316 }
3317
3318 /* after this point (skb is modified) we cannot return false */
3319
3320 if (skb_shared(skb)) {
3321 struct sk_buff *tmp_skb = skb;
3322
3323 skb = skb_clone(skb, GFP_ATOMIC);
3324 kfree_skb(tmp_skb);
3325
3326 if (!skb)
3327 return true;
3328 }
3329
6e0456b5
FF		 3330 if ((hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) &&
3331 ieee80211_amsdu_aggregate(sdata, sta, fast_tx, skb))
3332 return true;
3333
17c18bf8
JB		 3334 /* will not be crypto-handled beyond what we do here, so use false
3335 * as the may-encrypt argument for the resize to not account for
3336 * more room than we already have in 'extra_head'
3337 */
3338 if (unlikely(ieee80211_skb_resize(sdata, skb,
3339 max_t(int, extra_head + hw_headroom -
3340 skb_headroom(skb), 0),
3341 false))) {
3342 kfree_skb(skb);
3343 return true;
3344 }
3345
3346 memcpy(&eth, skb->data, ETH_HLEN - 2);
3347 hdr = (void *)skb_push(skb, extra_head);
3348 memcpy(skb->data, fast_tx->hdr, fast_tx->hdr_len);
3349 memcpy(skb->data + fast_tx->da_offs, eth.h_dest, ETH_ALEN);
3350 memcpy(skb->data + fast_tx->sa_offs, eth.h_source, ETH_ALEN);
3351
35f432a0 3352 info = IEEE80211_SKB_CB(skb);
17c18bf8
JB		 3353 memset(info, 0, sizeof(*info));
3354 info->band = fast_tx->band;
3355 info->control.vif = &sdata->vif;
3356 info->flags = IEEE80211_TX_CTL_FIRST_FRAGMENT |
3357 IEEE80211_TX_CTL_DONTFRAG |
3358 (tid_tx ? IEEE80211_TX_CTL_AMPDU : 0);
bb42f2d1 3359 info->control.flags = IEEE80211_TX_CTRL_FAST_XMIT;
17c18bf8 3360
a786f96d
FF		 3361 if (hdr->frame_control & cpu_to_le16(IEEE80211_STYPE_QOS_DATA)) {
3362 tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
3363 *ieee80211_get_qos_ctl(hdr) = tid;
3364 }
3365
17c18bf8
JB		 3366 __skb_queue_head_init(&tx.skbs);
3367
3368 tx.flags = IEEE80211_TX_UNICAST;
3369 tx.local = local;
3370 tx.sdata = sdata;
3371 tx.sta = sta;
3372 tx.key = fast_tx->key;
3373
30686bf7 3374 if (!ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) {
17c18bf8
JB		 3375 tx.skb = skb;
3376 r = ieee80211_tx_h_rate_ctrl(&tx);
3377 skb = tx.skb;
3378 tx.skb = NULL;
3379
3380 if (r != TX_CONTINUE) {
3381 if (r != TX_QUEUED)
3382 kfree_skb(skb);
3383 return true;
3384 }
3385 }
3386
bb42f2d1
THJ		 3387 if (ieee80211_queue_skb(local, sdata, sta, skb))
3388 return true;
17c18bf8 3389
bb42f2d1
THJ		 3390 ieee80211_xmit_fast_finish(sdata, sta, fast_tx->pn_offs,
3391 fast_tx->key, skb);
17c18bf8
JB		 3392
3393 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
3394 sdata = container_of(sdata->bss,
3395 struct ieee80211_sub_if_data, u.ap);
3396
3397 __skb_queue_tail(&tx.skbs, skb);
3398 ieee80211_tx_frags(local, &sdata->vif, &sta->sta, &tx.skbs, false);
3399 return true;
3400}
3401
e0e2efff
THJ		 3402struct sk_buff *ieee80211_tx_dequeue(struct ieee80211_hw *hw,
3403 struct ieee80211_txq *txq)
3404{
3405 struct ieee80211_local *local = hw_to_local(hw);
3406 struct txq_info *txqi = container_of(txq, struct txq_info, txq);
3407 struct ieee80211_hdr *hdr;
3408 struct sk_buff *skb = NULL;
3409 struct fq *fq = &local->fq;
3410 struct fq_tin *tin = &txqi->tin;
bb42f2d1
THJ		 3411 struct ieee80211_tx_info *info;
3412 struct ieee80211_tx_data tx;
3413 ieee80211_tx_result r;
e0e2efff
THJ		 3414
3415 spin_lock_bh(&fq->lock);
3416
3417 if (test_bit(IEEE80211_TXQ_STOP, &txqi->flags))
3418 goto out;
3419
bb42f2d1
THJ		 3420 /* Make sure fragments stay together. */
3421 skb = __skb_dequeue(&txqi->frags);
3422 if (skb)
3423 goto out;
3424
3425begin:
e0e2efff
THJ		 3426 skb = fq_tin_dequeue(fq, tin, fq_tin_dequeue_func);
3427 if (!skb)
3428 goto out;
3429
3430 ieee80211_set_skb_vif(skb, txqi);
3431
3432 hdr = (struct ieee80211_hdr *)skb->data;
bb42f2d1
THJ		 3433 info = IEEE80211_SKB_CB(skb);
3434
3435 memset(&tx, 0, sizeof(tx));
3436 __skb_queue_head_init(&tx.skbs);
3437 tx.local = local;
3438 tx.skb = skb;
3439 tx.sdata = vif_to_sdata(info->control.vif);
3440
3441 if (txq->sta)
3442 tx.sta = container_of(txq->sta, struct sta_info, sta);
3443
3444 /*
3445 * The key can be removed while the packet was queued, so need to call
3446 * this here to get the current key.
3447 */
3448 r = ieee80211_tx_h_select_key(&tx);
3449 if (r != TX_CONTINUE) {
3450 ieee80211_free_txskb(&local->hw, skb);
3451 goto begin;
3452 }
3453
c1f4c9ed
FF		 3454 if (test_bit(IEEE80211_TXQ_AMPDU, &txqi->flags))
3455 info->flags |= IEEE80211_TX_CTL_AMPDU;
3456 else
3457 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
3458
bb42f2d1 3459 if (info->control.flags & IEEE80211_TX_CTRL_FAST_XMIT) {
e0e2efff
THJ		 3460 struct sta_info *sta = container_of(txq->sta, struct sta_info,
3461 sta);
bb42f2d1 3462 u8 pn_offs = 0;
e0e2efff 3463
bb42f2d1
THJ		 3464 if (tx.key &&
3465 (tx.key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_IV))
3466 pn_offs = ieee80211_hdrlen(hdr->frame_control);
3467
3468 ieee80211_xmit_fast_finish(sta->sdata, sta, pn_offs,
3469 tx.key, skb);
3470 } else {
3471 if (invoke_tx_handlers_late(&tx))
3472 goto begin;
3473
3474 skb = __skb_dequeue(&tx.skbs);
3475
3476 if (!skb_queue_empty(&tx.skbs))
3477 skb_queue_splice_tail(&tx.skbs, &txqi->frags);
e0e2efff
THJ		 3478 }
3479
1e1430d5
JB		 3480 if (skb && skb_has_frag_list(skb) &&
3481 !ieee80211_hw_check(&local->hw, TX_FRAG_LIST)) {
3482 if (skb_linearize(skb)) {
3483 ieee80211_free_txskb(&local->hw, skb);
3484 goto begin;
3485 }
3486 }
3487
e0e2efff
THJ		 3488out:
3489 spin_unlock_bh(&fq->lock);
3490
e0e2efff
THJ		 3491 return skb;
3492}
3493EXPORT_SYMBOL(ieee80211_tx_dequeue);
3494
4c9451ed
JB		 3495void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3496 struct net_device *dev,
3497 u32 info_flags)
3498{
3499 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
97ffe757 3500 struct sta_info *sta;
80616c0d 3501 struct sk_buff *next;
4c9451ed
JB		 3502
3503 if (unlikely(skb->len < ETH_HLEN)) {
3504 kfree_skb(skb);
3505 return;
3506 }
3507
3508 rcu_read_lock();
e2ebc74d 3509
2d981fdd
JB		 3510 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3511 goto out_free;
4c9451ed 3512
17c18bf8
JB		 3513 if (!IS_ERR_OR_NULL(sta)) {
3514 struct ieee80211_fast_tx *fast_tx;
3515
3516 fast_tx = rcu_dereference(sta->fast_tx);
3517
3518 if (fast_tx &&
bb42f2d1 3519 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
17c18bf8
JB		 3520 goto out;
3521 }
3522
80616c0d
JB		 3523 if (skb_is_gso(skb)) {
3524 struct sk_buff *segs;
680a0dab 3525
80616c0d
JB		 3526 segs = skb_gso_segment(skb, 0);
3527 if (IS_ERR(segs)) {
2d981fdd 3528 goto out_free;
80616c0d
JB		 3529 } else if (segs) {
3530 consume_skb(skb);
3531 skb = segs;
3532 }
3533 } else {
3534 /* we cannot process non-linear frames on this path */
3535 if (skb_linearize(skb)) {
3536 kfree_skb(skb);
3537 goto out;
3538 }
3539
3540 /* the frame could be fragmented, software-encrypted, and other
3541 * things so we cannot really handle checksum offload with it -
3542 * fix it up in software before we handle anything else.
3543 */
3544 if (skb->ip_summed == CHECKSUM_PARTIAL) {
f603f1f3
JB		 3545 skb_set_transport_header(skb,
3546 skb_checksum_start_offset(skb));
80616c0d
JB		 3547 if (skb_checksum_help(skb))
3548 goto out_free;
3549 }
2d981fdd
JB		 3550 }
3551
80616c0d
JB		 3552 next = skb;
3553 while (next) {
3554 skb = next;
3555 next = skb->next;
4c9451ed 3556
80616c0d
JB		 3557 skb->prev = NULL;
3558 skb->next = NULL;
3559
3560 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3561 if (IS_ERR(skb))
3562 goto out;
e2ebc74d 3563
5a490510 3564 ieee80211_tx_stats(dev, skb->len);
80616c0d
JB		 3565
3566 ieee80211_xmit(sdata, sta, skb);
3567 }
2d981fdd
JB		 3568 goto out;
3569 out_free:
3570 kfree_skb(skb);
4c9451ed 3571 out:
55de908a 3572 rcu_read_unlock();
e2ebc74d
JB		 3573}
3574
ebceec86
MB		 3575static int ieee80211_change_da(struct sk_buff *skb, struct sta_info *sta)
3576{
3577 struct ethhdr *eth;
3578 int err;
3579
3580 err = skb_ensure_writable(skb, ETH_HLEN);
3581 if (unlikely(err))
3582 return err;
3583
3584 eth = (void *)skb->data;
3585 ether_addr_copy(eth->h_dest, sta->sta.addr);
3586
3587 return 0;
3588}
3589
3590static bool ieee80211_multicast_to_unicast(struct sk_buff *skb,
3591 struct net_device *dev)
3592{
3593 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3594 const struct ethhdr *eth = (void *)skb->data;
3595 const struct vlan_ethhdr *ethvlan = (void *)skb->data;
3596 __be16 ethertype;
3597
3598 if (likely(!is_multicast_ether_addr(eth->h_dest)))
3599 return false;
3600
3601 switch (sdata->vif.type) {
3602 case NL80211_IFTYPE_AP_VLAN:
3603 if (sdata->u.vlan.sta)
3604 return false;
3605 if (sdata->wdev.use_4addr)
3606 return false;
3607 /* fall through */
3608 case NL80211_IFTYPE_AP:
3609 /* check runtime toggle for this bss */
3610 if (!sdata->bss->multicast_to_unicast)
3611 return false;
3612 break;
3613 default:
3614 return false;
3615 }
3616
3617 /* multicast to unicast conversion only for some payload */
3618 ethertype = eth->h_proto;
3619 if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN)
3620 ethertype = ethvlan->h_vlan_encapsulated_proto;
3621 switch (ethertype) {
3622 case htons(ETH_P_ARP):
3623 case htons(ETH_P_IP):
3624 case htons(ETH_P_IPV6):
3625 break;
3626 default:
3627 return false;
3628 }
3629
3630 return true;
3631}
3632
3633static void
3634ieee80211_convert_to_unicast(struct sk_buff *skb, struct net_device *dev,
3635 struct sk_buff_head *queue)
3636{
3637 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
3638 struct ieee80211_local *local = sdata->local;
3639 const struct ethhdr *eth = (struct ethhdr *)skb->data;
3640 struct sta_info *sta, *first = NULL;
3641 struct sk_buff *cloned_skb;
3642
3643 rcu_read_lock();
3644
3645 list_for_each_entry_rcu(sta, &local->sta_list, list) {
3646 if (sdata != sta->sdata)
3647 /* AP-VLAN mismatch */
3648 continue;
3649 if (unlikely(ether_addr_equal(eth->h_source, sta->sta.addr)))
3650 /* do not send back to source */
3651 continue;
3652 if (!first) {
3653 first = sta;
3654 continue;
3655 }
3656 cloned_skb = skb_clone(skb, GFP_ATOMIC);
3657 if (!cloned_skb)
3658 goto multicast;
3659 if (unlikely(ieee80211_change_da(cloned_skb, sta))) {
3660 dev_kfree_skb(cloned_skb);
3661 goto multicast;
3662 }
3663 __skb_queue_tail(queue, cloned_skb);
3664 }
3665
3666 if (likely(first)) {
3667 if (unlikely(ieee80211_change_da(skb, first)))
3668 goto multicast;
3669 __skb_queue_tail(queue, skb);
3670 } else {
3671 /* no STA connected, drop */
3672 kfree_skb(skb);
3673 skb = NULL;
3674 }
3675
3676 goto out;
3677multicast:
3678 __skb_queue_purge(queue);
3679 __skb_queue_tail(queue, skb);
3680out:
3681 rcu_read_unlock();
3682}
3683
4c9451ed
JB		 3684/**
3685 * ieee80211_subif_start_xmit - netif start_xmit function for 802.3 vifs
3686 * @skb: packet to be sent
3687 * @dev: incoming interface
3688 *
3689 * On failure skb will be freed.
3690 */
24d342c5
LK		 3691netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
3692 struct net_device *dev)
3693{
ebceec86
MB		 3694 if (unlikely(ieee80211_multicast_to_unicast(skb, dev))) {
3695 struct sk_buff_head queue;
3696
3697 __skb_queue_head_init(&queue);
3698 ieee80211_convert_to_unicast(skb, dev, &queue);
3699 while ((skb = __skb_dequeue(&queue)))
3700 __ieee80211_subif_start_xmit(skb, dev, 0);
3701 } else {
3702 __ieee80211_subif_start_xmit(skb, dev, 0);
3703 }
3704
24d342c5
LK		 3705 return NETDEV_TX_OK;
3706}
e2ebc74d 3707
7528ec57
JB		 3708struct sk_buff *
3709ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
3710 struct sk_buff *skb, u32 info_flags)
3711{
3712 struct ieee80211_hdr *hdr;
3713 struct ieee80211_tx_data tx = {
3714 .local = sdata->local,
3715 .sdata = sdata,
3716 };
97ffe757 3717 struct sta_info *sta;
7528ec57
JB		 3718
3719 rcu_read_lock();
3720
97ffe757
JB		 3721 if (ieee80211_lookup_ra_sta(sdata, skb, &sta)) {
3722 kfree_skb(skb);
3723 skb = ERR_PTR(-EINVAL);
3724 goto out;
3725 }
3726
3727 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
7528ec57
JB		 3728 if (IS_ERR(skb))
3729 goto out;
3730
3731 hdr = (void *)skb->data;
3732 tx.sta = sta_info_get(sdata, hdr->addr1);
3733 tx.skb = skb;
3734
3735 if (ieee80211_tx_h_select_key(&tx) != TX_CONTINUE) {
3736 rcu_read_unlock();
3737 kfree_skb(skb);
3738 return ERR_PTR(-EINVAL);
3739 }
3740
3741out:
3742 rcu_read_unlock();
3743 return skb;
3744}
3745
e2530083
JB		 3746/*
3747 * ieee80211_clear_tx_pending may not be called in a context where
3748 * it is possible that it packets could come in again.
3749 */
e2ebc74d
JB		 3750void ieee80211_clear_tx_pending(struct ieee80211_local *local)
3751{
1f98ab7f 3752 struct sk_buff *skb;
2de8e0d9 3753 int i;
e2ebc74d 3754
1f98ab7f
FF		 3755 for (i = 0; i < local->hw.queues; i++) {
3756 while ((skb = skb_dequeue(&local->pending[i])) != NULL)
3757 ieee80211_free_txskb(&local->hw, skb);
3758 }
e2ebc74d
JB		 3759}
3760
7bb45683
JB		 3761/*
3762 * Returns false if the frame couldn't be transmitted but was queued instead,
3763 * which in this case means re-queued -- take as an indication to stop sending
3764 * more pending frames.
3765 */
cd8ffc80
JB		 3766static bool ieee80211_tx_pending_skb(struct ieee80211_local *local,
3767 struct sk_buff *skb)
3768{
3769 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
3770 struct ieee80211_sub_if_data *sdata;
3771 struct sta_info *sta;
3772 struct ieee80211_hdr *hdr;
7bb45683 3773 bool result;
55de908a 3774 struct ieee80211_chanctx_conf *chanctx_conf;
cd8ffc80 3775
5061b0c2 3776 sdata = vif_to_sdata(info->control.vif);
cd8ffc80
JB		 3777
3778 if (info->flags & IEEE80211_TX_INTFL_NEED_TXPROCESSING) {
55de908a
JB		 3779 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
3780 if (unlikely(!chanctx_conf)) {
3781 dev_kfree_skb(skb);
3782 return true;
3783 }
73c4e195 3784 info->band = chanctx_conf->def.chan->band;
7c10770f 3785 result = ieee80211_tx(sdata, NULL, skb, true);
cd8ffc80 3786 } else {
252b86c4
JB		 3787 struct sk_buff_head skbs;
3788
3789 __skb_queue_head_init(&skbs);
3790 __skb_queue_tail(&skbs, skb);
3791
cd8ffc80 3792 hdr = (struct ieee80211_hdr *)skb->data;
abe60632 3793 sta = sta_info_get(sdata, hdr->addr1);
cd8ffc80 3794
74e4dbfd 3795 result = __ieee80211_tx(local, &skbs, skb->len, sta, true);
cd8ffc80
JB		 3796 }
3797
cd8ffc80
JB		 3798 return result;
3799}
3800
e2530083 3801/*
3b8d81e0 3802 * Transmit all pending packets. Called from tasklet.
e2530083 3803 */
e2ebc74d
JB		 3804void ieee80211_tx_pending(unsigned long data)
3805{
3806 struct ieee80211_local *local = (struct ieee80211_local *)data;
2a577d98 3807 unsigned long flags;
cd8ffc80 3808 int i;
3b8d81e0 3809 bool txok;
e2ebc74d 3810
f0e72851 3811 rcu_read_lock();
e2530083 3812
3b8d81e0 3813 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
2a577d98
JB		 3814 for (i = 0; i < local->hw.queues; i++) {
3815 /*
3816 * If queue is stopped by something other than due to pending
3817 * frames, or we have no pending frames, proceed to next queue.
3818 */
3b8d81e0 3819 if (local->queue_stop_reasons[i] ||
2a577d98 3820 skb_queue_empty(&local->pending[i]))
e2ebc74d 3821 continue;
e2530083 3822
2a577d98 3823 while (!skb_queue_empty(&local->pending[i])) {
3b8d81e0 3824 struct sk_buff *skb = __skb_dequeue(&local->pending[i]);
5061b0c2 3825 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
5061b0c2 3826
a7bc376c 3827 if (WARN_ON(!info->control.vif)) {
c3e7724b 3828 ieee80211_free_txskb(&local->hw, skb);
a7bc376c
JB		 3829 continue;
3830 }
3831
3b8d81e0
JB		 3832 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
3833 flags);
3834
3835 txok = ieee80211_tx_pending_skb(local, skb);
3b8d81e0
JB		 3836 spin_lock_irqsave(&local->queue_stop_reason_lock,
3837 flags);
3838 if (!txok)
2a577d98 3839 break;
e2ebc74d 3840 }
7236fe29
JB		 3841
3842 if (skb_queue_empty(&local->pending[i]))
3a25a8c8 3843 ieee80211_propagate_queue_wake(local, i);
e2ebc74d 3844 }
3b8d81e0 3845 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
2a577d98 3846
f0e72851 3847 rcu_read_unlock();
e2ebc74d
JB		 3848}
3849
3850/* functions for drivers to get certain frames */
3851
eac70c13 3852static void __ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3853 struct ps_data *ps, struct sk_buff *skb,
3854 bool is_template)
e2ebc74d
JB		 3855{
3856 u8 *pos, *tim;
3857 int aid0 = 0;
3858 int i, have_bits = 0, n1, n2;
3859
3860 /* Generate bitmap for TIM only if there are any STAs in power save
3861 * mode. */
d012a605 3862 if (atomic_read(&ps->num_sta_ps) > 0)
e2ebc74d
JB		 3863 /* in the hope that this is faster than
3864 * checking byte-for-byte */
f359d3fe 3865 have_bits = !bitmap_empty((unsigned long *)ps->tim,
e2ebc74d 3866 IEEE80211_MAX_AID+1);
6ec8c332
AO		 3867 if (!is_template) {
3868 if (ps->dtim_count == 0)
3869 ps->dtim_count = sdata->vif.bss_conf.dtim_period - 1;
3870 else
3871 ps->dtim_count--;
3872 }
e2ebc74d
JB		 3873
3874 tim = pos = (u8 *) skb_put(skb, 6);
3875 *pos++ = WLAN_EID_TIM;
3876 *pos++ = 4;
d012a605 3877 *pos++ = ps->dtim_count;
8860020e 3878 *pos++ = sdata->vif.bss_conf.dtim_period;
e2ebc74d 3879
d012a605 3880 if (ps->dtim_count == 0 && !skb_queue_empty(&ps->bc_buf))
e2ebc74d
JB		 3881 aid0 = 1;
3882
d012a605 3883 ps->dtim_bc_mc = aid0 == 1;
512119b3 3884
e2ebc74d
JB		 3885 if (have_bits) {
3886 /* Find largest even number N1 so that bits numbered 1 through
3887 * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits
3888 * (N2 + 1) x 8 through 2007 are 0. */
3889 n1 = 0;
3890 for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) {
d012a605 3891 if (ps->tim[i]) {
e2ebc74d
JB		 3892 n1 = i & 0xfe;
3893 break;
3894 }
3895 }
3896 n2 = n1;
3897 for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) {
d012a605 3898 if (ps->tim[i]) {
e2ebc74d
JB		 3899 n2 = i;
3900 break;
3901 }
3902 }
3903
3904 /* Bitmap control */
3905 *pos++ = n1 | aid0;
3906 /* Part Virt Bitmap */
5220da39 3907 skb_put(skb, n2 - n1);
d012a605 3908 memcpy(pos, ps->tim + n1, n2 - n1 + 1);
e2ebc74d
JB		 3909
3910 tim[1] = n2 - n1 + 4;
e2ebc74d
JB		 3911 } else {
3912 *pos++ = aid0; /* Bitmap control */
3913 *pos++ = 0; /* Part Virt Bitmap */
3914 }
e2ebc74d
JB		 3915}
3916
eac70c13 3917static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
6ec8c332
AO		 3918 struct ps_data *ps, struct sk_buff *skb,
3919 bool is_template)
eac70c13
MP		 3920{
3921 struct ieee80211_local *local = sdata->local;
3922
3923 /*
3924 * Not very nice, but we want to allow the driver to call
3925 * ieee80211_beacon_get() as a response to the set_tim()
3926 * callback. That, however, is already invoked under the
3927 * sta_lock to guarantee consistent and race-free update
3928 * of the tim bitmap in mac80211 and the driver.
3929 */
3930 if (local->tim_in_locked_section) {
6ec8c332 3931 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
eac70c13 3932 } else {
1b91731d 3933 spin_lock_bh(&local->tim_lock);
6ec8c332 3934 __ieee80211_beacon_add_tim(sdata, ps, skb, is_template);
1b91731d 3935 spin_unlock_bh(&local->tim_lock);
eac70c13
MP		 3936 }
3937
3938 return 0;
3939}
3940
1af586c9
AO		 3941static void ieee80211_set_csa(struct ieee80211_sub_if_data *sdata,
3942 struct beacon_data *beacon)
73da7d5b
SW		 3943{
3944 struct probe_resp *resp;
cd7760e6
SW		 3945 u8 *beacon_data;
3946 size_t beacon_data_len;
0d06d9ba 3947 int i;
af296bdb 3948 u8 count = beacon->csa_current_counter;
cd7760e6
SW		 3949
3950 switch (sdata->vif.type) {
3951 case NL80211_IFTYPE_AP:
3952 beacon_data = beacon->tail;
3953 beacon_data_len = beacon->tail_len;
3954 break;
3955 case NL80211_IFTYPE_ADHOC:
3956 beacon_data = beacon->head;
3957 beacon_data_len = beacon->head_len;
3958 break;
b8456a14
CYY		 3959 case NL80211_IFTYPE_MESH_POINT:
3960 beacon_data = beacon->head;
3961 beacon_data_len = beacon->head_len;
3962 break;
cd7760e6
SW		 3963 default:
3964 return;
3965 }
73da7d5b 3966
af296bdb 3967 rcu_read_lock();
0d06d9ba 3968 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; ++i) {
af296bdb 3969 resp = rcu_dereference(sdata->u.ap.probe_resp);
0d06d9ba 3970
af296bdb
MK		 3971 if (beacon->csa_counter_offsets[i]) {
3972 if (WARN_ON_ONCE(beacon->csa_counter_offsets[i] >=
3973 beacon_data_len)) {
0d06d9ba
AO		 3974 rcu_read_unlock();
3975 return;
3976 }
af296bdb
MK		 3977
3978 beacon_data[beacon->csa_counter_offsets[i]] = count;
73da7d5b 3979 }
af296bdb
MK		 3980
3981 if (sdata->vif.type == NL80211_IFTYPE_AP && resp)
3982 resp->data[resp->csa_counter_offsets[i]] = count;
73da7d5b 3983 }
af296bdb 3984 rcu_read_unlock();
1af586c9
AO		 3985}
3986
e996ec2a
WD		 3987static u8 __ieee80211_csa_update_counter(struct beacon_data *beacon)
3988{
3989 beacon->csa_current_counter--;
3990
3991 /* the counter should never reach 0 */
3992 WARN_ON_ONCE(!beacon->csa_current_counter);
3993
3994 return beacon->csa_current_counter;
3995}
3996
1af586c9
AO		 3997u8 ieee80211_csa_update_counter(struct ieee80211_vif *vif)
3998{
3999 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
af296bdb
MK		 4000 struct beacon_data *beacon = NULL;
4001 u8 count = 0;
0d06d9ba 4002
af296bdb
MK		 4003 rcu_read_lock();
4004
4005 if (sdata->vif.type == NL80211_IFTYPE_AP)
4006 beacon = rcu_dereference(sdata->u.ap.beacon);
4007 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
4008 beacon = rcu_dereference(sdata->u.ibss.presp);
4009 else if (ieee80211_vif_is_mesh(&sdata->vif))
4010 beacon = rcu_dereference(sdata->u.mesh.beacon);
4011
4012 if (!beacon)
4013 goto unlock;
4014
e996ec2a 4015 count = __ieee80211_csa_update_counter(beacon);
1af586c9 4016
af296bdb
MK		 4017unlock:
4018 rcu_read_unlock();
4019 return count;
73da7d5b 4020}
1af586c9 4021EXPORT_SYMBOL(ieee80211_csa_update_counter);
73da7d5b
SW		 4022
4023bool ieee80211_csa_is_complete(struct ieee80211_vif *vif)
4024{
4025 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4026 struct beacon_data *beacon = NULL;
4027 u8 *beacon_data;
4028 size_t beacon_data_len;
73da7d5b
SW		 4029 int ret = false;
4030
4031 if (!ieee80211_sdata_running(sdata))
4032 return false;
4033
4034 rcu_read_lock();
4035 if (vif->type == NL80211_IFTYPE_AP) {
4036 struct ieee80211_if_ap *ap = &sdata->u.ap;
4037
4038 beacon = rcu_dereference(ap->beacon);
4039 if (WARN_ON(!beacon || !beacon->tail))
4040 goto out;
4041 beacon_data = beacon->tail;
4042 beacon_data_len = beacon->tail_len;
cd7760e6
SW		 4043 } else if (vif->type == NL80211_IFTYPE_ADHOC) {
4044 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
4045
4046 beacon = rcu_dereference(ifibss->presp);
4047 if (!beacon)
4048 goto out;
4049
b8456a14
CYY		 4050 beacon_data = beacon->head;
4051 beacon_data_len = beacon->head_len;
4052 } else if (vif->type == NL80211_IFTYPE_MESH_POINT) {
4053 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4054
4055 beacon = rcu_dereference(ifmsh->beacon);
4056 if (!beacon)
4057 goto out;
4058
cd7760e6
SW		 4059 beacon_data = beacon->head;
4060 beacon_data_len = beacon->head_len;
73da7d5b
SW		 4061 } else {
4062 WARN_ON(1);
4063 goto out;
4064 }
4065
10d78f27
MK		 4066 if (!beacon->csa_counter_offsets[0])
4067 goto out;
4068
af296bdb 4069 if (WARN_ON_ONCE(beacon->csa_counter_offsets[0] > beacon_data_len))
73da7d5b
SW		 4070 goto out;
4071
af296bdb 4072 if (beacon_data[beacon->csa_counter_offsets[0]] == 1)
73da7d5b
SW		 4073 ret = true;
4074 out:
4075 rcu_read_unlock();
4076
4077 return ret;
4078}
4079EXPORT_SYMBOL(ieee80211_csa_is_complete);
4080
6ec8c332
AO		 4081static struct sk_buff *
4082__ieee80211_beacon_get(struct ieee80211_hw *hw,
4083 struct ieee80211_vif *vif,
4084 struct ieee80211_mutable_offsets *offs,
4085 bool is_template)
e2ebc74d
JB		 4086{
4087 struct ieee80211_local *local = hw_to_local(hw);
af296bdb 4088 struct beacon_data *beacon = NULL;
9d139c81 4089 struct sk_buff *skb = NULL;
e039fa4a 4090 struct ieee80211_tx_info *info;
e2ebc74d 4091 struct ieee80211_sub_if_data *sdata = NULL;
57fbcce3 4092 enum nl80211_band band;
e00cfce0 4093 struct ieee80211_tx_rate_control txrc;
55de908a 4094 struct ieee80211_chanctx_conf *chanctx_conf;
1af586c9 4095 int csa_off_base = 0;
8318d78a 4096
5dfdaf58 4097 rcu_read_lock();
e2ebc74d 4098
32bfd35d 4099 sdata = vif_to_sdata(vif);
55de908a 4100 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
e2ebc74d 4101
55de908a 4102 if (!ieee80211_sdata_running(sdata) || !chanctx_conf)
eb3e554b
FF		 4103 goto out;
4104
6ec8c332
AO		 4105 if (offs)
4106 memset(offs, 0, sizeof(*offs));
eddcbb94 4107
05c914fe 4108 if (sdata->vif.type == NL80211_IFTYPE_AP) {
d012a605 4109 struct ieee80211_if_ap *ap = &sdata->u.ap;
d012a605 4110
af296bdb 4111 beacon = rcu_dereference(ap->beacon);
3ad97fbc 4112 if (beacon) {
10d78f27 4113 if (beacon->csa_counter_offsets[0]) {
1af586c9 4114 if (!is_template)
e996ec2a 4115 __ieee80211_csa_update_counter(beacon);
1af586c9
AO		 4116
4117 ieee80211_set_csa(sdata, beacon);
4118 }
73da7d5b 4119
902acc78
JB		 4120 /*
4121 * headroom, head length,
4122 * tail length and maximum TIM length
4123 */
4124 skb = dev_alloc_skb(local->tx_headroom +
4125 beacon->head_len +
70dabeb7
FF		 4126 beacon->tail_len + 256 +
4127 local->hw.extra_beacon_tailroom);
902acc78
JB		 4128 if (!skb)
4129 goto out;
33b64eb2 4130
902acc78
JB		 4131 skb_reserve(skb, local->tx_headroom);
4132 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4133 beacon->head_len);
33b64eb2 4134
6ec8c332
AO		 4135 ieee80211_beacon_add_tim(sdata, &ap->ps, skb,
4136 is_template);
33b64eb2 4137
6ec8c332
AO		 4138 if (offs) {
4139 offs->tim_offset = beacon->head_len;
4140 offs->tim_length = skb->len - beacon->head_len;
1af586c9
AO		 4141
4142 /* for AP the csa offsets are from tail */
4143 csa_off_base = skb->len;
6ec8c332 4144 }
eddcbb94 4145
902acc78
JB		 4146 if (beacon->tail)
4147 memcpy(skb_put(skb, beacon->tail_len),
4148 beacon->tail, beacon->tail_len);
9d139c81
JB		 4149 } else
4150 goto out;
05c914fe 4151 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
46900298 4152 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
9d139c81 4153 struct ieee80211_hdr *hdr;
33b64eb2 4154
af296bdb
MK		 4155 beacon = rcu_dereference(ifibss->presp);
4156 if (!beacon)
9d139c81
JB		 4157 goto out;
4158
10d78f27 4159 if (beacon->csa_counter_offsets[0]) {
1af586c9 4160 if (!is_template)
e996ec2a 4161 __ieee80211_csa_update_counter(beacon);
cd7760e6 4162
af296bdb 4163 ieee80211_set_csa(sdata, beacon);
1af586c9 4164 }
cd7760e6 4165
af296bdb 4166 skb = dev_alloc_skb(local->tx_headroom + beacon->head_len +
70dabeb7 4167 local->hw.extra_beacon_tailroom);
9d139c81
JB		 4168 if (!skb)
4169 goto out;
c3ffeab4 4170 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4171 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4172 beacon->head_len);
9d139c81
JB		 4173
4174 hdr = (struct ieee80211_hdr *) skb->data;
e7827a70
HH		 4175 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4176 IEEE80211_STYPE_BEACON);
902acc78 4177 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
dbf498fb 4178 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
472dbc45 4179
af296bdb
MK		 4180 beacon = rcu_dereference(ifmsh->beacon);
4181 if (!beacon)
ac1bd846 4182 goto out;
ac1bd846 4183
10d78f27 4184 if (beacon->csa_counter_offsets[0]) {
1af586c9
AO		 4185 if (!is_template)
4186 /* TODO: For mesh csa_counter is in TU, so
4187 * decrementing it by one isn't correct, but
4188 * for now we leave it consistent with overall
4189 * mac80211's behavior.
4190 */
e996ec2a 4191 __ieee80211_csa_update_counter(beacon);
1af586c9 4192
af296bdb 4193 ieee80211_set_csa(sdata, beacon);
1af586c9 4194 }
b8456a14 4195
dbf498fb 4196 if (ifmsh->sync_ops)
445cd452 4197 ifmsh->sync_ops->adjust_tsf(sdata, beacon);
dbf498fb 4198
3b69a9c5 4199 skb = dev_alloc_skb(local->tx_headroom +
af296bdb 4200 beacon->head_len +
3f52b7e3 4201 256 + /* TIM IE */
af296bdb 4202 beacon->tail_len +
70dabeb7 4203 local->hw.extra_beacon_tailroom);
902acc78
JB		 4204 if (!skb)
4205 goto out;
2b5e1967 4206 skb_reserve(skb, local->tx_headroom);
af296bdb
MK		 4207 memcpy(skb_put(skb, beacon->head_len), beacon->head,
4208 beacon->head_len);
6ec8c332
AO		 4209 ieee80211_beacon_add_tim(sdata, &ifmsh->ps, skb, is_template);
4210
4211 if (offs) {
af296bdb
MK		 4212 offs->tim_offset = beacon->head_len;
4213 offs->tim_length = skb->len - beacon->head_len;
6ec8c332
AO		 4214 }
4215
af296bdb
MK		 4216 memcpy(skb_put(skb, beacon->tail_len), beacon->tail,
4217 beacon->tail_len);
9d139c81
JB		 4218 } else {
4219 WARN_ON(1);
5dfdaf58 4220 goto out;
e2ebc74d
JB		 4221 }
4222
1af586c9 4223 /* CSA offsets */
af296bdb 4224 if (offs && beacon) {
1af586c9
AO		 4225 int i;
4226
4227 for (i = 0; i < IEEE80211_MAX_CSA_COUNTERS_NUM; i++) {
af296bdb 4228 u16 csa_off = beacon->csa_counter_offsets[i];
1af586c9
AO		 4229
4230 if (!csa_off)
4231 continue;
4232
4233 offs->csa_counter_offs[i] = csa_off_base + csa_off;
4234 }
4235 }
4236
4bf88530 4237 band = chanctx_conf->def.chan->band;
55de908a 4238
e039fa4a
JB		 4239 info = IEEE80211_SKB_CB(skb);
4240
3b8d81e0 4241 info->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
e00cfce0 4242 info->flags |= IEEE80211_TX_CTL_NO_ACK;
e039fa4a 4243 info->band = band;
e00cfce0
JM		 4244
4245 memset(&txrc, 0, sizeof(txrc));
4246 txrc.hw = hw;
e31583cd 4247 txrc.sband = local->hw.wiphy->bands[band];
e00cfce0
JM		 4248 txrc.bss_conf = &sdata->vif.bss_conf;
4249 txrc.skb = skb;
4250 txrc.reported_rate.idx = -1;
37eb0b16 4251 txrc.rate_idx_mask = sdata->rc_rateidx_mask[band];
e31583cd 4252 if (txrc.rate_idx_mask == (1 << txrc.sband->n_bitrates) - 1)
37eb0b16
JM		 4253 txrc.max_rate_idx = -1;
4254 else
4255 txrc.max_rate_idx = fls(txrc.rate_idx_mask) - 1;
8f0729b1 4256 txrc.bss = true;
e00cfce0 4257 rate_control_get_rate(sdata, NULL, &txrc);
e039fa4a
JB		 4258
4259 info->control.vif = vif;
f591fa5d 4260
a472e71b
JL		 4261 info->flags |= IEEE80211_TX_CTL_CLEAR_PS_FILT |
4262 IEEE80211_TX_CTL_ASSIGN_SEQ |
4263 IEEE80211_TX_CTL_FIRST_FRAGMENT;
e6a9854b 4264 out:
5dfdaf58 4265 rcu_read_unlock();
e2ebc74d 4266 return skb;
6ec8c332
AO		 4267
4268}
4269
4270struct sk_buff *
4271ieee80211_beacon_get_template(struct ieee80211_hw *hw,
4272 struct ieee80211_vif *vif,
4273 struct ieee80211_mutable_offsets *offs)
4274{
4275 return __ieee80211_beacon_get(hw, vif, offs, true);
4276}
4277EXPORT_SYMBOL(ieee80211_beacon_get_template);
4278
4279struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
4280 struct ieee80211_vif *vif,
4281 u16 *tim_offset, u16 *tim_length)
4282{
4283 struct ieee80211_mutable_offsets offs = {};
4284 struct sk_buff *bcn = __ieee80211_beacon_get(hw, vif, &offs, false);
35afa588
HS		 4285 struct sk_buff *copy;
4286 struct ieee80211_supported_band *sband;
4287 int shift;
4288
4289 if (!bcn)
4290 return bcn;
6ec8c332
AO		 4291
4292 if (tim_offset)
4293 *tim_offset = offs.tim_offset;
4294
4295 if (tim_length)
4296 *tim_length = offs.tim_length;
4297
35afa588
HS		 4298 if (ieee80211_hw_check(hw, BEACON_TX_STATUS) ||
4299 !hw_to_local(hw)->monitors)
4300 return bcn;
4301
4302 /* send a copy to monitor interfaces */
4303 copy = skb_copy(bcn, GFP_ATOMIC);
4304 if (!copy)
4305 return bcn;
4306
4307 shift = ieee80211_vif_get_shift(vif);
4308 sband = hw->wiphy->bands[ieee80211_get_sdata_band(vif_to_sdata(vif))];
4309 ieee80211_tx_monitor(hw_to_local(hw), copy, sband, 1, shift, false);
4310
6ec8c332 4311 return bcn;
e2ebc74d 4312}
eddcbb94 4313EXPORT_SYMBOL(ieee80211_beacon_get_tim);
e2ebc74d 4314
02945821
AN		 4315struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw,
4316 struct ieee80211_vif *vif)
4317{
4318 struct ieee80211_if_ap *ap = NULL;
aa7a0080
ES		 4319 struct sk_buff *skb = NULL;
4320 struct probe_resp *presp = NULL;
02945821
AN		 4321 struct ieee80211_hdr *hdr;
4322 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4323
4324 if (sdata->vif.type != NL80211_IFTYPE_AP)
4325 return NULL;
4326
4327 rcu_read_lock();
4328
4329 ap = &sdata->u.ap;
4330 presp = rcu_dereference(ap->probe_resp);
4331 if (!presp)
4332 goto out;
4333
aa7a0080 4334 skb = dev_alloc_skb(presp->len);
02945821
AN		 4335 if (!skb)
4336 goto out;
4337
aa7a0080
ES		 4338 memcpy(skb_put(skb, presp->len), presp->data, presp->len);
4339
02945821
AN		 4340 hdr = (struct ieee80211_hdr *) skb->data;
4341 memset(hdr->addr1, 0, sizeof(hdr->addr1));
4342
4343out:
4344 rcu_read_unlock();
4345 return skb;
4346}
4347EXPORT_SYMBOL(ieee80211_proberesp_get);
4348
7044cc56
KV		 4349struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw,
4350 struct ieee80211_vif *vif)
4351{
4352 struct ieee80211_sub_if_data *sdata;
4353 struct ieee80211_if_managed *ifmgd;
4354 struct ieee80211_pspoll *pspoll;
4355 struct ieee80211_local *local;
4356 struct sk_buff *skb;
4357
4358 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4359 return NULL;
4360
4361 sdata = vif_to_sdata(vif);
4362 ifmgd = &sdata->u.mgd;
4363 local = sdata->local;
4364
4365 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*pspoll));
d15b8459 4366 if (!skb)
7044cc56 4367 return NULL;
d15b8459 4368
7044cc56
KV		 4369 skb_reserve(skb, local->hw.extra_tx_headroom);
4370
4371 pspoll = (struct ieee80211_pspoll *) skb_put(skb, sizeof(*pspoll));
4372 memset(pspoll, 0, sizeof(*pspoll));
4373 pspoll->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
4374 IEEE80211_STYPE_PSPOLL);
4375 pspoll->aid = cpu_to_le16(ifmgd->aid);
4376
4377 /* aid in PS-Poll has its two MSBs each set to 1 */
4378 pspoll->aid |= cpu_to_le16(1 << 15 | 1 << 14);
4379
4380 memcpy(pspoll->bssid, ifmgd->bssid, ETH_ALEN);
4381 memcpy(pspoll->ta, vif->addr, ETH_ALEN);
4382
4383 return skb;
4384}
4385EXPORT_SYMBOL(ieee80211_pspoll_get);
4386
4387struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw,
4388 struct ieee80211_vif *vif)
4389{
4390 struct ieee80211_hdr_3addr *nullfunc;
4391 struct ieee80211_sub_if_data *sdata;
4392 struct ieee80211_if_managed *ifmgd;
4393 struct ieee80211_local *local;
4394 struct sk_buff *skb;
4395
4396 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
4397 return NULL;
4398
4399 sdata = vif_to_sdata(vif);
4400 ifmgd = &sdata->u.mgd;
4401 local = sdata->local;
4402
4403 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*nullfunc));
d15b8459 4404 if (!skb)
7044cc56 4405 return NULL;
d15b8459 4406
7044cc56
KV		 4407 skb_reserve(skb, local->hw.extra_tx_headroom);
4408
4409 nullfunc = (struct ieee80211_hdr_3addr *) skb_put(skb,
4410 sizeof(*nullfunc));
4411 memset(nullfunc, 0, sizeof(*nullfunc));
4412 nullfunc->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
4413 IEEE80211_STYPE_NULLFUNC |
4414 IEEE80211_FCTL_TODS);
4415 memcpy(nullfunc->addr1, ifmgd->bssid, ETH_ALEN);
4416 memcpy(nullfunc->addr2, vif->addr, ETH_ALEN);
4417 memcpy(nullfunc->addr3, ifmgd->bssid, ETH_ALEN);
4418
4419 return skb;
4420}
4421EXPORT_SYMBOL(ieee80211_nullfunc_get);
4422
05e54ea6 4423struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw,
a344d677 4424 const u8 *src_addr,
05e54ea6 4425 const u8 *ssid, size_t ssid_len,
b9a9ada1 4426 size_t tailroom)
05e54ea6 4427{
a344d677 4428 struct ieee80211_local *local = hw_to_local(hw);
05e54ea6
KV		 4429 struct ieee80211_hdr_3addr *hdr;
4430 struct sk_buff *skb;
4431 size_t ie_ssid_len;
4432 u8 *pos;
4433
05e54ea6
KV		 4434 ie_ssid_len = 2 + ssid_len;
4435
4436 skb = dev_alloc_skb(local->hw.extra_tx_headroom + sizeof(*hdr) +
b9a9ada1 4437 ie_ssid_len + tailroom);
d15b8459 4438 if (!skb)
05e54ea6 4439 return NULL;
05e54ea6
KV		 4440
4441 skb_reserve(skb, local->hw.extra_tx_headroom);
4442
4443 hdr = (struct ieee80211_hdr_3addr *) skb_put(skb, sizeof(*hdr));
4444 memset(hdr, 0, sizeof(*hdr));
4445 hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
4446 IEEE80211_STYPE_PROBE_REQ);
e83e6541 4447 eth_broadcast_addr(hdr->addr1);
a344d677 4448 memcpy(hdr->addr2, src_addr, ETH_ALEN);
e83e6541 4449 eth_broadcast_addr(hdr->addr3);
05e54ea6
KV		 4450
4451 pos = skb_put(skb, ie_ssid_len);
4452 *pos++ = WLAN_EID_SSID;
4453 *pos++ = ssid_len;
88c868c4 4454 if (ssid_len)
05e54ea6
KV		 4455 memcpy(pos, ssid, ssid_len);
4456 pos += ssid_len;
4457
05e54ea6
KV		 4458 return skb;
4459}
4460EXPORT_SYMBOL(ieee80211_probereq_get);
4461
32bfd35d 4462void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4463 const void *frame, size_t frame_len,
e039fa4a 4464 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4465 struct ieee80211_rts *rts)
4466{
4467 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4468
065e9605
HH		 4469 rts->frame_control =
4470 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
32bfd35d
JB		 4471 rts->duration = ieee80211_rts_duration(hw, vif, frame_len,
4472 frame_txctl);
e2ebc74d
JB		 4473 memcpy(rts->ra, hdr->addr1, sizeof(rts->ra));
4474 memcpy(rts->ta, hdr->addr2, sizeof(rts->ta));
4475}
4476EXPORT_SYMBOL(ieee80211_rts_get);
4477
32bfd35d 4478void ieee80211_ctstoself_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
e2ebc74d 4479 const void *frame, size_t frame_len,
e039fa4a 4480 const struct ieee80211_tx_info *frame_txctl,
e2ebc74d
JB		 4481 struct ieee80211_cts *cts)
4482{
4483 const struct ieee80211_hdr *hdr = frame;
e2ebc74d 4484
065e9605
HH		 4485 cts->frame_control =
4486 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
32bfd35d
JB		 4487 cts->duration = ieee80211_ctstoself_duration(hw, vif,
4488 frame_len, frame_txctl);
e2ebc74d
JB		 4489 memcpy(cts->ra, hdr->addr1, sizeof(cts->ra));
4490}
4491EXPORT_SYMBOL(ieee80211_ctstoself_get);
4492
4493struct sk_buff *
32bfd35d 4494ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
e039fa4a 4495 struct ieee80211_vif *vif)
e2ebc74d
JB		 4496{
4497 struct ieee80211_local *local = hw_to_local(hw);
747cf5e9 4498 struct sk_buff *skb = NULL;
5cf121c3 4499 struct ieee80211_tx_data tx;
e2ebc74d 4500 struct ieee80211_sub_if_data *sdata;
d012a605 4501 struct ps_data *ps;
e039fa4a 4502 struct ieee80211_tx_info *info;
55de908a 4503 struct ieee80211_chanctx_conf *chanctx_conf;
e2ebc74d 4504
32bfd35d 4505 sdata = vif_to_sdata(vif);
5dfdaf58 4506
5dfdaf58 4507 rcu_read_lock();
55de908a 4508 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
5dfdaf58 4509
d012a605
MP		 4510 if (!chanctx_conf)
4511 goto out;
4512
4513 if (sdata->vif.type == NL80211_IFTYPE_AP) {
4514 struct beacon_data *beacon =
4515 rcu_dereference(sdata->u.ap.beacon);
4516
4517 if (!beacon || !beacon->head)
4518 goto out;
4519
4520 ps = &sdata->u.ap.ps;
3f52b7e3
MP		 4521 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4522 ps = &sdata->u.mesh.ps;
d012a605 4523 } else {
747cf5e9 4524 goto out;
d012a605 4525 }
5dfdaf58 4526
d012a605 4527 if (ps->dtim_count != 0 || !ps->dtim_bc_mc)
747cf5e9 4528 goto out; /* send buffered bc/mc only after DTIM beacon */
e039fa4a 4529
e2ebc74d 4530 while (1) {
d012a605 4531 skb = skb_dequeue(&ps->bc_buf);
e2ebc74d 4532 if (!skb)
747cf5e9 4533 goto out;
e2ebc74d
JB		 4534 local->total_ps_buffered--;
4535
d012a605 4536 if (!skb_queue_empty(&ps->bc_buf) && skb->len >= 2) {
e2ebc74d
JB		 4537 struct ieee80211_hdr *hdr =
4538 (struct ieee80211_hdr *) skb->data;
4539 /* more buffered multicast/broadcast frames ==> set
4540 * MoreData flag in IEEE 802.11 header to inform PS
4541 * STAs */
4542 hdr->frame_control |=
4543 cpu_to_le16(IEEE80211_FCTL_MOREDATA);
4544 }
4545
112c44b2 4546 if (sdata->vif.type == NL80211_IFTYPE_AP)
7cbf9d01 4547 sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
7c10770f 4548 if (!ieee80211_tx_prepare(sdata, &tx, NULL, skb))
e2ebc74d 4549 break;
6b07d9ca 4550 ieee80211_free_txskb(hw, skb);
e2ebc74d 4551 }
e039fa4a
JB		 4552
4553 info = IEEE80211_SKB_CB(skb);
4554
5cf121c3 4555 tx.flags |= IEEE80211_TX_PS_BUFFERED;
4bf88530 4556 info->band = chanctx_conf->def.chan->band;
e2ebc74d 4557
97b045d6 4558 if (invoke_tx_handlers(&tx))
e2ebc74d 4559 skb = NULL;
97b045d6 4560 out:
d0709a65 4561 rcu_read_unlock();
e2ebc74d
JB		 4562
4563 return skb;
4564}
4565EXPORT_SYMBOL(ieee80211_get_buffered_bc);
3b8d81e0 4566
b6da911b
LK		 4567int ieee80211_reserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4568{
4569 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4570 struct ieee80211_sub_if_data *sdata = sta->sdata;
4571 struct ieee80211_local *local = sdata->local;
4572 int ret;
4573 u32 queues;
4574
4575 lockdep_assert_held(&local->sta_mtx);
4576
4577 /* only some cases are supported right now */
4578 switch (sdata->vif.type) {
4579 case NL80211_IFTYPE_STATION:
4580 case NL80211_IFTYPE_AP:
4581 case NL80211_IFTYPE_AP_VLAN:
4582 break;
4583 default:
4584 WARN_ON(1);
4585 return -EINVAL;
4586 }
4587
4588 if (WARN_ON(tid >= IEEE80211_NUM_UPS))
4589 return -EINVAL;
4590
4591 if (sta->reserved_tid == tid) {
4592 ret = 0;
4593 goto out;
4594 }
4595
4596 if (sta->reserved_tid != IEEE80211_TID_UNRESERVED) {
4597 sdata_err(sdata, "TID reservation already active\n");
4598 ret = -EALREADY;
4599 goto out;
4600 }
4601
4602 ieee80211_stop_vif_queues(sdata->local, sdata,
4603 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4604
4605 synchronize_net();
4606
4607 /* Tear down BA sessions so we stop aggregating on this TID */
30686bf7 4608 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION)) {
b6da911b
LK		 4609 set_sta_flag(sta, WLAN_STA_BLOCK_BA);
4610 __ieee80211_stop_tx_ba_session(sta, tid,
4611 AGG_STOP_LOCAL_REQUEST);
4612 }
4613
4614 queues = BIT(sdata->vif.hw_queue[ieee802_1d_to_ac[tid]]);
3b24f4c6 4615 __ieee80211_flush_queues(local, sdata, queues, false);
b6da911b
LK		 4616
4617 sta->reserved_tid = tid;
4618
4619 ieee80211_wake_vif_queues(local, sdata,
4620 IEEE80211_QUEUE_STOP_REASON_RESERVE_TID);
4621
30686bf7 4622 if (ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION))
b6da911b
LK		 4623 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
4624
4625 ret = 0;
4626 out:
4627 return ret;
4628}
4629EXPORT_SYMBOL(ieee80211_reserve_tid);
4630
4631void ieee80211_unreserve_tid(struct ieee80211_sta *pubsta, u8 tid)
4632{
4633 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
4634 struct ieee80211_sub_if_data *sdata = sta->sdata;
4635
4636 lockdep_assert_held(&sdata->local->sta_mtx);
4637
4638 /* only some cases are supported right now */
4639 switch (sdata->vif.type) {
4640 case NL80211_IFTYPE_STATION:
4641 case NL80211_IFTYPE_AP:
4642 case NL80211_IFTYPE_AP_VLAN:
4643 break;
4644 default:
4645 WARN_ON(1);
4646 return;
4647 }
4648
4649 if (tid != sta->reserved_tid) {
4650 sdata_err(sdata, "TID to unreserve (%d) isn't reserved\n", tid);
4651 return;
4652 }
4653
4654 sta->reserved_tid = IEEE80211_TID_UNRESERVED;
4655}
4656EXPORT_SYMBOL(ieee80211_unreserve_tid);
4657
55de908a
JB		 4658void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
4659 struct sk_buff *skb, int tid,
57fbcce3 4660 enum nl80211_band band)
3b8d81e0 4661{
731977e9 4662 int ac = ieee80211_ac_from_tid(tid);
3a25a8c8 4663
d57a544d 4664 skb_reset_mac_header(skb);
3a25a8c8 4665 skb_set_queue_mapping(skb, ac);
cf6bb79a 4666 skb->priority = tid;
cf0277e7 4667
89afe614
JB		 4668 skb->dev = sdata->dev;
4669
3d34deb6
JB		 4670 /*
4671 * The other path calling ieee80211_xmit is from the tasklet,
4672 * and while we can handle concurrent transmissions locking
4673 * requirements are that we do not come into tx with bhs on.
4674 */
4675 local_bh_disable();
73c4e195 4676 IEEE80211_SKB_CB(skb)->band = band;
7c10770f 4677 ieee80211_xmit(sdata, NULL, skb);
3d34deb6 4678 local_bh_enable();
3b8d81e0 4679}
Linux 6.x block layer and io_uring tree(s)