root/net/mac80211/status.c

DEFINITIONS

1. ieee80211_tx_status_irqsafe
2. ieee80211_handle_filtered_frame
3. ieee80211_check_pending_bar
4. ieee80211_frame_acked
5. ieee80211_set_bar_pending
6. ieee80211_tx_radiotap_len
7. ieee80211_add_tx_radiotap_header
8. ieee80211_tdls_td_tx_handle
9. ieee80211_sdata_from_skb
10. ieee80211_report_ack_skb
11. ieee80211_report_used_skb
12. ieee80211_lost_packet
13. ieee80211_tx_get_rates
14. ieee80211_tx_monitor
15. __ieee80211_tx_status
16. ieee80211_tx_status
17. ieee80211_tx_status_ext
18. ieee80211_tx_rate_update
19. ieee80211_report_low_ack
20. ieee80211_free_txskb
21. ieee80211_purge_tx_queue

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2002-2005, Instant802 Networks, Inc.
   4  * Copyright 2005-2006, Devicescape Software, Inc.
   5  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   6  * Copyright 2008-2010  Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2013-2014  Intel Mobile Communications GmbH
   8  */
   9 
  10 #include <linux/export.h>
  11 #include <linux/etherdevice.h>
  12 #include <net/mac80211.h>
  13 #include <asm/unaligned.h>
  14 #include "ieee80211_i.h"
  15 #include "rate.h"
  16 #include "mesh.h"
  17 #include "led.h"
  18 #include "wme.h"
  19 
  20 
  21 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
  22                                  struct sk_buff *skb)
  23 {
  24         struct ieee80211_local *local = hw_to_local(hw);
  25         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  26         int tmp;
  27 
  28         skb->pkt_type = IEEE80211_TX_STATUS_MSG;
  29         skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
  30                        &local->skb_queue : &local->skb_queue_unreliable, skb);
  31         tmp = skb_queue_len(&local->skb_queue) +
  32                 skb_queue_len(&local->skb_queue_unreliable);
  33         while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
  34                (skb = skb_dequeue(&local->skb_queue_unreliable))) {
  35                 ieee80211_free_txskb(hw, skb);
  36                 tmp--;
  37                 I802_DEBUG_INC(local->tx_status_drop);
  38         }
  39         tasklet_schedule(&local->tasklet);
  40 }
  41 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
  42 
  43 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
  44                                             struct sta_info *sta,
  45                                             struct sk_buff *skb)
  46 {
  47         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
  48         struct ieee80211_hdr *hdr = (void *)skb->data;
  49         int ac;
  50 
  51         if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
  52                            IEEE80211_TX_CTL_AMPDU)) {
  53                 ieee80211_free_txskb(&local->hw, skb);
  54                 return;
  55         }
  56 
  57         /*
  58          * This skb 'survived' a round-trip through the driver, and
  59          * hopefully the driver didn't mangle it too badly. However,
  60          * we can definitely not rely on the control information
  61          * being correct. Clear it so we don't get junk there, and
  62          * indicate that it needs new processing, but must not be
  63          * modified/encrypted again.
  64          */
  65         memset(&info->control, 0, sizeof(info->control));
  66 
  67         info->control.jiffies = jiffies;
  68         info->control.vif = &sta->sdata->vif;
  69         info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
  70                        IEEE80211_TX_INTFL_RETRANSMISSION;
  71         info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
  72 
  73         sta->status_stats.filtered++;
  74 
  75         /*
  76          * Clear more-data bit on filtered frames, it might be set
  77          * but later frames might time out so it might have to be
  78          * clear again ... It's all rather unlikely (this frame
  79          * should time out first, right?) but let's not confuse
  80          * peers unnecessarily.
  81          */
  82         if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
  83                 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
  84 
  85         if (ieee80211_is_data_qos(hdr->frame_control)) {
  86                 u8 *p = ieee80211_get_qos_ctl(hdr);
  87                 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
  88 
  89                 /*
  90                  * Clear EOSP if set, this could happen e.g.
  91                  * if an absence period (us being a P2P GO)
  92                  * shortens the SP.
  93                  */
  94                 if (*p & IEEE80211_QOS_CTL_EOSP)
  95                         *p &= ~IEEE80211_QOS_CTL_EOSP;
  96                 ac = ieee80211_ac_from_tid(tid);
  97         } else {
  98                 ac = IEEE80211_AC_BE;
  99         }
 100 
 101         /*
 102          * Clear the TX filter mask for this STA when sending the next
 103          * packet. If the STA went to power save mode, this will happen
 104          * when it wakes up for the next time.
 105          */
 106         set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
 107         ieee80211_clear_fast_xmit(sta);
 108 
 109         /*
 110          * This code races in the following way:
 111          *
 112          *  (1) STA sends frame indicating it will go to sleep and does so
 113          *  (2) hardware/firmware adds STA to filter list, passes frame up
 114          *  (3) hardware/firmware processes TX fifo and suppresses a frame
 115          *  (4) we get TX status before having processed the frame and
 116          *      knowing that the STA has gone to sleep.
 117          *
 118          * This is actually quite unlikely even when both those events are
 119          * processed from interrupts coming in quickly after one another or
 120          * even at the same time because we queue both TX status events and
 121          * RX frames to be processed by a tasklet and process them in the
 122          * same order that they were received or TX status last. Hence, there
 123          * is no race as long as the frame RX is processed before the next TX
 124          * status, which drivers can ensure, see below.
 125          *
 126          * Note that this can only happen if the hardware or firmware can
 127          * actually add STAs to the filter list, if this is done by the
 128          * driver in response to set_tim() (which will only reduce the race
 129          * this whole filtering tries to solve, not completely solve it)
 130          * this situation cannot happen.
 131          *
 132          * To completely solve this race drivers need to make sure that they
 133          *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
 134          *      functions and
 135          *  (b) always process RX events before TX status events if ordering
 136          *      can be unknown, for example with different interrupt status
 137          *      bits.
 138          *  (c) if PS mode transitions are manual (i.e. the flag
 139          *      %IEEE80211_HW_AP_LINK_PS is set), always process PS state
 140          *      changes before calling TX status events if ordering can be
 141          *      unknown.
 142          */
 143         if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
 144             skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
 145                 skb_queue_tail(&sta->tx_filtered[ac], skb);
 146                 sta_info_recalc_tim(sta);
 147 
 148                 if (!timer_pending(&local->sta_cleanup))
 149                         mod_timer(&local->sta_cleanup,
 150                                   round_jiffies(jiffies +
 151                                                 STA_INFO_CLEANUP_INTERVAL));
 152                 return;
 153         }
 154 
 155         if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
 156             !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
 157                 /* Software retry the packet once */
 158                 info->flags |= IEEE80211_TX_INTFL_RETRIED;
 159                 ieee80211_add_pending_skb(local, skb);
 160                 return;
 161         }
 162 
 163         ps_dbg_ratelimited(sta->sdata,
 164                            "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
 165                            skb_queue_len(&sta->tx_filtered[ac]),
 166                            !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
 167         ieee80211_free_txskb(&local->hw, skb);
 168 }
 169 
 170 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
 171 {
 172         struct tid_ampdu_tx *tid_tx;
 173 
 174         tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 175         if (!tid_tx || !tid_tx->bar_pending)
 176                 return;
 177 
 178         tid_tx->bar_pending = false;
 179         ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
 180 }
 181 
 182 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
 183 {
 184         struct ieee80211_mgmt *mgmt = (void *) skb->data;
 185         struct ieee80211_local *local = sta->local;
 186         struct ieee80211_sub_if_data *sdata = sta->sdata;
 187         struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
 188 
 189         if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
 190                 sta->status_stats.last_ack = jiffies;
 191                 if (txinfo->status.is_valid_ack_signal) {
 192                         sta->status_stats.last_ack_signal =
 193                                          (s8)txinfo->status.ack_signal;
 194                         sta->status_stats.ack_signal_filled = true;
 195                         ewma_avg_signal_add(&sta->status_stats.avg_ack_signal,
 196                                             -txinfo->status.ack_signal);
 197                 }
 198         }
 199 
 200         if (ieee80211_is_data_qos(mgmt->frame_control)) {
 201                 struct ieee80211_hdr *hdr = (void *) skb->data;
 202                 u8 *qc = ieee80211_get_qos_ctl(hdr);
 203                 u16 tid = qc[0] & 0xf;
 204 
 205                 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
 206         }
 207 
 208         if (ieee80211_is_action(mgmt->frame_control) &&
 209             !ieee80211_has_protected(mgmt->frame_control) &&
 210             mgmt->u.action.category == WLAN_CATEGORY_HT &&
 211             mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
 212             ieee80211_sdata_running(sdata)) {
 213                 enum ieee80211_smps_mode smps_mode;
 214 
 215                 switch (mgmt->u.action.u.ht_smps.smps_control) {
 216                 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
 217                         smps_mode = IEEE80211_SMPS_DYNAMIC;
 218                         break;
 219                 case WLAN_HT_SMPS_CONTROL_STATIC:
 220                         smps_mode = IEEE80211_SMPS_STATIC;
 221                         break;
 222                 case WLAN_HT_SMPS_CONTROL_DISABLED:
 223                 default: /* shouldn't happen since we don't send that */
 224                         smps_mode = IEEE80211_SMPS_OFF;
 225                         break;
 226                 }
 227 
 228                 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
 229                         /*
 230                          * This update looks racy, but isn't -- if we come
 231                          * here we've definitely got a station that we're
 232                          * talking to, and on a managed interface that can
 233                          * only be the AP. And the only other place updating
 234                          * this variable in managed mode is before association.
 235                          */
 236                         sdata->smps_mode = smps_mode;
 237                         ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
 238                 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
 239                            sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
 240                         sta->known_smps_mode = smps_mode;
 241                 }
 242         }
 243 }
 244 
 245 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
 246 {
 247         struct tid_ampdu_tx *tid_tx;
 248 
 249         tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
 250         if (!tid_tx)
 251                 return;
 252 
 253         tid_tx->failed_bar_ssn = ssn;
 254         tid_tx->bar_pending = true;
 255 }
 256 
 257 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info,
 258                                      struct ieee80211_tx_status *status)
 259 {
 260         int len = sizeof(struct ieee80211_radiotap_header);
 261 
 262         /* IEEE80211_RADIOTAP_RATE rate */
 263         if (status && status->rate && !(status->rate->flags &
 264                                         (RATE_INFO_FLAGS_MCS |
 265                                          RATE_INFO_FLAGS_DMG |
 266                                          RATE_INFO_FLAGS_EDMG |
 267                                          RATE_INFO_FLAGS_VHT_MCS |
 268                                          RATE_INFO_FLAGS_HE_MCS)))
 269                 len += 2;
 270         else if (info->status.rates[0].idx >= 0 &&
 271                  !(info->status.rates[0].flags &
 272                    (IEEE80211_TX_RC_MCS | IEEE80211_TX_RC_VHT_MCS)))
 273                 len += 2;
 274 
 275         /* IEEE80211_RADIOTAP_TX_FLAGS */
 276         len += 2;
 277 
 278         /* IEEE80211_RADIOTAP_DATA_RETRIES */
 279         len += 1;
 280 
 281         /* IEEE80211_RADIOTAP_MCS
 282          * IEEE80211_RADIOTAP_VHT */
 283         if (status && status->rate) {
 284                 if (status->rate->flags & RATE_INFO_FLAGS_MCS)
 285                         len += 3;
 286                 else if (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)
 287                         len = ALIGN(len, 2) + 12;
 288                 else if (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)
 289                         len = ALIGN(len, 2) + 12;
 290         } else if (info->status.rates[0].idx >= 0) {
 291                 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
 292                         len += 3;
 293                 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
 294                         len = ALIGN(len, 2) + 12;
 295         }
 296 
 297         return len;
 298 }
 299 
 300 static void
 301 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
 302                                  struct ieee80211_supported_band *sband,
 303                                  struct sk_buff *skb, int retry_count,
 304                                  int rtap_len, int shift,
 305                                  struct ieee80211_tx_status *status)
 306 {
 307         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 308         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 309         struct ieee80211_radiotap_header *rthdr;
 310         unsigned char *pos;
 311         u16 legacy_rate = 0;
 312         u16 txflags;
 313 
 314         rthdr = skb_push(skb, rtap_len);
 315 
 316         memset(rthdr, 0, rtap_len);
 317         rthdr->it_len = cpu_to_le16(rtap_len);
 318         rthdr->it_present =
 319                 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
 320                             (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
 321         pos = (unsigned char *)(rthdr + 1);
 322 
 323         /*
 324          * XXX: Once radiotap gets the bitmap reset thing the vendor
 325          *      extensions proposal contains, we can actually report
 326          *      the whole set of tries we did.
 327          */
 328 
 329         /* IEEE80211_RADIOTAP_RATE */
 330 
 331         if (status && status->rate) {
 332                 if (!(status->rate->flags & (RATE_INFO_FLAGS_MCS |
 333                                              RATE_INFO_FLAGS_DMG |
 334                                              RATE_INFO_FLAGS_EDMG |
 335                                              RATE_INFO_FLAGS_VHT_MCS |
 336                                              RATE_INFO_FLAGS_HE_MCS)))
 337                         legacy_rate = status->rate->legacy;
 338         } else if (info->status.rates[0].idx >= 0 &&
 339                  !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
 340                                                   IEEE80211_TX_RC_VHT_MCS)))
 341                 legacy_rate =
 342                         sband->bitrates[info->status.rates[0].idx].bitrate;
 343 
 344         if (legacy_rate) {
 345                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
 346                 *pos = DIV_ROUND_UP(legacy_rate, 5 * (1 << shift));
 347                 /* padding for tx flags */
 348                 pos += 2;
 349         }
 350 
 351         /* IEEE80211_RADIOTAP_TX_FLAGS */
 352         txflags = 0;
 353         if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
 354             !is_multicast_ether_addr(hdr->addr1))
 355                 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
 356 
 357         if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
 358                 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
 359         if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
 360                 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
 361 
 362         put_unaligned_le16(txflags, pos);
 363         pos += 2;
 364 
 365         /* IEEE80211_RADIOTAP_DATA_RETRIES */
 366         /* for now report the total retry_count */
 367         *pos = retry_count;
 368         pos++;
 369 
 370         if (status && status->rate &&
 371             (status->rate->flags & RATE_INFO_FLAGS_MCS)) {
 372                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
 373                 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 374                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 375                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 376                 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
 377                         pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 378                 if (status->rate->bw == RATE_INFO_BW_40)
 379                         pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 380                 pos[2] = status->rate->mcs;
 381                 pos += 3;
 382         } else if (status && status->rate &&
 383                    (status->rate->flags & RATE_INFO_FLAGS_VHT_MCS)) {
 384                 u16 known = local->hw.radiotap_vht_details &
 385                         (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 386                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 387 
 388                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
 389 
 390                 /* required alignment from rthdr */
 391                 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 392 
 393                 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 394                 put_unaligned_le16(known, pos);
 395                 pos += 2;
 396 
 397                 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 398                 if (status->rate->flags & RATE_INFO_FLAGS_SHORT_GI)
 399                         *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 400                 pos++;
 401 
 402                 /* u8 bandwidth */
 403                 switch (status->rate->bw) {
 404                 case RATE_INFO_BW_160:
 405                         *pos = 11;
 406                         break;
 407                 case RATE_INFO_BW_80:
 408                         *pos = 4;
 409                         break;
 410                 case RATE_INFO_BW_40:
 411                         *pos = 1;
 412                         break;
 413                 default:
 414                         *pos = 0;
 415                         break;
 416                 }
 417                 pos++;
 418 
 419                 /* u8 mcs_nss[4] */
 420                 *pos = (status->rate->mcs << 4) | status->rate->nss;
 421                 pos += 4;
 422 
 423                 /* u8 coding */
 424                 pos++;
 425                 /* u8 group_id */
 426                 pos++;
 427                 /* u16 partial_aid */
 428                 pos += 2;
 429         } else if (status && status->rate &&
 430                    (status->rate->flags & RATE_INFO_FLAGS_HE_MCS)) {
 431                 struct ieee80211_radiotap_he *he;
 432 
 433                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_HE);
 434 
 435                 /* required alignment from rthdr */
 436                 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 437                 he = (struct ieee80211_radiotap_he *)pos;
 438 
 439                 he->data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_FORMAT_SU |
 440                                         IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
 441                                         IEEE80211_RADIOTAP_HE_DATA1_DATA_DCM_KNOWN |
 442                                         IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN);
 443 
 444                 he->data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN);
 445 
 446 #define HE_PREP(f, val) le16_encode_bits(val, IEEE80211_RADIOTAP_HE_##f)
 447 
 448                 he->data6 |= HE_PREP(DATA6_NSTS, status->rate->nss);
 449 
 450 #define CHECK_GI(s) \
 451         BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_GI_##s != \
 452         (int)NL80211_RATE_INFO_HE_GI_##s)
 453 
 454                 CHECK_GI(0_8);
 455                 CHECK_GI(1_6);
 456                 CHECK_GI(3_2);
 457 
 458                 he->data3 |= HE_PREP(DATA3_DATA_MCS, status->rate->mcs);
 459                 he->data3 |= HE_PREP(DATA3_DATA_DCM, status->rate->he_dcm);
 460 
 461                 he->data5 |= HE_PREP(DATA5_GI, status->rate->he_gi);
 462 
 463                 switch (status->rate->bw) {
 464                 case RATE_INFO_BW_20:
 465                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 466                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_20MHZ);
 467                         break;
 468                 case RATE_INFO_BW_40:
 469                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 470                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_40MHZ);
 471                         break;
 472                 case RATE_INFO_BW_80:
 473                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 474                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_80MHZ);
 475                         break;
 476                 case RATE_INFO_BW_160:
 477                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 478                                              IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_160MHZ);
 479                         break;
 480                 case RATE_INFO_BW_HE_RU:
 481 #define CHECK_RU_ALLOC(s) \
 482         BUILD_BUG_ON(IEEE80211_RADIOTAP_HE_DATA5_DATA_BW_RU_ALLOC_##s##T != \
 483         NL80211_RATE_INFO_HE_RU_ALLOC_##s + 4)
 484 
 485                         CHECK_RU_ALLOC(26);
 486                         CHECK_RU_ALLOC(52);
 487                         CHECK_RU_ALLOC(106);
 488                         CHECK_RU_ALLOC(242);
 489                         CHECK_RU_ALLOC(484);
 490                         CHECK_RU_ALLOC(996);
 491                         CHECK_RU_ALLOC(2x996);
 492 
 493                         he->data5 |= HE_PREP(DATA5_DATA_BW_RU_ALLOC,
 494                                              status->rate->he_ru_alloc + 4);
 495                         break;
 496                 default:
 497                         WARN_ONCE(1, "Invalid SU BW %d\n", status->rate->bw);
 498                 }
 499 
 500                 pos += sizeof(struct ieee80211_radiotap_he);
 501         }
 502 
 503         if ((status && status->rate) || info->status.rates[0].idx < 0)
 504                 return;
 505 
 506         /* IEEE80211_RADIOTAP_MCS
 507          * IEEE80211_RADIOTAP_VHT */
 508         if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
 509                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
 510                 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
 511                          IEEE80211_RADIOTAP_MCS_HAVE_GI |
 512                          IEEE80211_RADIOTAP_MCS_HAVE_BW;
 513                 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 514                         pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
 515                 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 516                         pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
 517                 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
 518                         pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
 519                 pos[2] = info->status.rates[0].idx;
 520                 pos += 3;
 521         } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
 522                 u16 known = local->hw.radiotap_vht_details &
 523                         (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
 524                          IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
 525 
 526                 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
 527 
 528                 /* required alignment from rthdr */
 529                 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
 530 
 531                 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
 532                 put_unaligned_le16(known, pos);
 533                 pos += 2;
 534 
 535                 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
 536                 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
 537                         *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
 538                 pos++;
 539 
 540                 /* u8 bandwidth */
 541                 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
 542                         *pos = 1;
 543                 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
 544                         *pos = 4;
 545                 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
 546                         *pos = 11;
 547                 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
 548                         *pos = 0;
 549                 pos++;
 550 
 551                 /* u8 mcs_nss[4] */
 552                 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
 553                         ieee80211_rate_get_vht_nss(&info->status.rates[0]);
 554                 pos += 4;
 555 
 556                 /* u8 coding */
 557                 pos++;
 558                 /* u8 group_id */
 559                 pos++;
 560                 /* u16 partial_aid */
 561                 pos += 2;
 562         }
 563 }
 564 
 565 /*
 566  * Handles the tx for TDLS teardown frames.
 567  * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
 568  */
 569 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
 570                                         struct ieee80211_sub_if_data *sdata,
 571                                         struct sk_buff *skb, u32 flags)
 572 {
 573         struct sk_buff *teardown_skb;
 574         struct sk_buff *orig_teardown_skb;
 575         bool is_teardown = false;
 576 
 577         /* Get the teardown data we need and free the lock */
 578         spin_lock(&sdata->u.mgd.teardown_lock);
 579         teardown_skb = sdata->u.mgd.teardown_skb;
 580         orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
 581         if ((skb == orig_teardown_skb) && teardown_skb) {
 582                 sdata->u.mgd.teardown_skb = NULL;
 583                 sdata->u.mgd.orig_teardown_skb = NULL;
 584                 is_teardown = true;
 585         }
 586         spin_unlock(&sdata->u.mgd.teardown_lock);
 587 
 588         if (is_teardown) {
 589                 /* This mechanism relies on being able to get ACKs */
 590                 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
 591 
 592                 /* Check if peer has ACKed */
 593                 if (flags & IEEE80211_TX_STAT_ACK) {
 594                         dev_kfree_skb_any(teardown_skb);
 595                 } else {
 596                         tdls_dbg(sdata,
 597                                  "TDLS Resending teardown through AP\n");
 598 
 599                         ieee80211_subif_start_xmit(teardown_skb, skb->dev);
 600                 }
 601         }
 602 }
 603 
 604 static struct ieee80211_sub_if_data *
 605 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
 606 {
 607         struct ieee80211_sub_if_data *sdata;
 608 
 609         if (skb->dev) {
 610                 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 611                         if (!sdata->dev)
 612                                 continue;
 613 
 614                         if (skb->dev == sdata->dev)
 615                                 return sdata;
 616                 }
 617 
 618                 return NULL;
 619         }
 620 
 621         return rcu_dereference(local->p2p_sdata);
 622 }
 623 
 624 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
 625                                      struct ieee80211_tx_info *info,
 626                                      bool acked, bool dropped)
 627 {
 628         struct sk_buff *skb;
 629         unsigned long flags;
 630 
 631         spin_lock_irqsave(&local->ack_status_lock, flags);
 632         skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
 633         spin_unlock_irqrestore(&local->ack_status_lock, flags);
 634 
 635         if (!skb)
 636                 return;
 637 
 638         if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
 639                 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
 640                 struct ieee80211_sub_if_data *sdata;
 641                 struct ieee80211_hdr *hdr = (void *)skb->data;
 642 
 643                 rcu_read_lock();
 644                 sdata = ieee80211_sdata_from_skb(local, skb);
 645                 if (sdata) {
 646                         if (ieee80211_is_any_nullfunc(hdr->frame_control))
 647                                 cfg80211_probe_status(sdata->dev, hdr->addr1,
 648                                                       cookie, acked,
 649                                                       info->status.ack_signal,
 650                                                       info->status.is_valid_ack_signal,
 651                                                       GFP_ATOMIC);
 652                         else
 653                                 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
 654                                                         skb->data, skb->len,
 655                                                         acked, GFP_ATOMIC);
 656                 }
 657                 rcu_read_unlock();
 658 
 659                 dev_kfree_skb_any(skb);
 660         } else if (dropped) {
 661                 dev_kfree_skb_any(skb);
 662         } else {
 663                 /* consumes skb */
 664                 skb_complete_wifi_ack(skb, acked);
 665         }
 666 }
 667 
 668 static void ieee80211_report_used_skb(struct ieee80211_local *local,
 669                                       struct sk_buff *skb, bool dropped)
 670 {
 671         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 672         struct ieee80211_hdr *hdr = (void *)skb->data;
 673         bool acked = info->flags & IEEE80211_TX_STAT_ACK;
 674 
 675         if (dropped)
 676                 acked = false;
 677 
 678         if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
 679                 struct ieee80211_sub_if_data *sdata;
 680 
 681                 rcu_read_lock();
 682 
 683                 sdata = ieee80211_sdata_from_skb(local, skb);
 684 
 685                 if (!sdata) {
 686                         skb->dev = NULL;
 687                 } else {
 688                         unsigned int hdr_size =
 689                                 ieee80211_hdrlen(hdr->frame_control);
 690 
 691                         /* Check to see if packet is a TDLS teardown packet */
 692                         if (ieee80211_is_data(hdr->frame_control) &&
 693                             (ieee80211_get_tdls_action(skb, hdr_size) ==
 694                              WLAN_TDLS_TEARDOWN))
 695                                 ieee80211_tdls_td_tx_handle(local, sdata, skb,
 696                                                             info->flags);
 697                         else
 698                                 ieee80211_mgd_conn_tx_status(sdata,
 699                                                              hdr->frame_control,
 700                                                              acked);
 701                 }
 702 
 703                 rcu_read_unlock();
 704         } else if (info->ack_frame_id) {
 705                 ieee80211_report_ack_skb(local, info, acked, dropped);
 706         }
 707 
 708         if (!dropped && skb->destructor) {
 709                 skb->wifi_acked_valid = 1;
 710                 skb->wifi_acked = acked;
 711         }
 712 
 713         ieee80211_led_tx(local);
 714 
 715         if (skb_has_frag_list(skb)) {
 716                 kfree_skb_list(skb_shinfo(skb)->frag_list);
 717                 skb_shinfo(skb)->frag_list = NULL;
 718         }
 719 }
 720 
 721 /*
 722  * Use a static threshold for now, best value to be determined
 723  * by testing ...
 724  * Should it depend on:
 725  *  - on # of retransmissions
 726  *  - current throughput (higher value for higher tpt)?
 727  */
 728 #define STA_LOST_PKT_THRESHOLD  50
 729 #define STA_LOST_TDLS_PKT_THRESHOLD     10
 730 #define STA_LOST_TDLS_PKT_TIME          (10*HZ) /* 10secs since last ACK */
 731 
 732 static void ieee80211_lost_packet(struct sta_info *sta,
 733                                   struct ieee80211_tx_info *info)
 734 {
 735         /* If driver relies on its own algorithm for station kickout, skip
 736          * mac80211 packet loss mechanism.
 737          */
 738         if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
 739                 return;
 740 
 741         /* This packet was aggregated but doesn't carry status info */
 742         if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 743             !(info->flags & IEEE80211_TX_STAT_AMPDU))
 744                 return;
 745 
 746         sta->status_stats.lost_packets++;
 747         if (!sta->sta.tdls &&
 748             sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
 749                 return;
 750 
 751         /*
 752          * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
 753          * of the last packets were lost, and that no ACK was received in the
 754          * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
 755          * mechanism.
 756          */
 757         if (sta->sta.tdls &&
 758             (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
 759              time_before(jiffies,
 760                          sta->status_stats.last_tdls_pkt_time +
 761                          STA_LOST_TDLS_PKT_TIME)))
 762                 return;
 763 
 764         cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
 765                                     sta->status_stats.lost_packets, GFP_ATOMIC);
 766         sta->status_stats.lost_packets = 0;
 767 }
 768 
 769 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
 770                                   struct ieee80211_tx_info *info,
 771                                   int *retry_count)
 772 {
 773         int rates_idx = -1;
 774         int count = -1;
 775         int i;
 776 
 777         for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
 778                 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
 779                     !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
 780                         /* just the first aggr frame carry status info */
 781                         info->status.rates[i].idx = -1;
 782                         info->status.rates[i].count = 0;
 783                         break;
 784                 } else if (info->status.rates[i].idx < 0) {
 785                         break;
 786                 } else if (i >= hw->max_report_rates) {
 787                         /* the HW cannot have attempted that rate */
 788                         info->status.rates[i].idx = -1;
 789                         info->status.rates[i].count = 0;
 790                         break;
 791                 }
 792 
 793                 count += info->status.rates[i].count;
 794         }
 795         rates_idx = i - 1;
 796 
 797         if (count < 0)
 798                 count = 0;
 799 
 800         *retry_count = count;
 801         return rates_idx;
 802 }
 803 
 804 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
 805                           struct ieee80211_supported_band *sband,
 806                           int retry_count, int shift, bool send_to_cooked,
 807                           struct ieee80211_tx_status *status)
 808 {
 809         struct sk_buff *skb2;
 810         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 811         struct ieee80211_sub_if_data *sdata;
 812         struct net_device *prev_dev = NULL;
 813         int rtap_len;
 814 
 815         /* send frame to monitor interfaces now */
 816         rtap_len = ieee80211_tx_radiotap_len(info, status);
 817         if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
 818                 pr_err("ieee80211_tx_status: headroom too small\n");
 819                 dev_kfree_skb(skb);
 820                 return;
 821         }
 822         ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
 823                                          rtap_len, shift, status);
 824 
 825         /* XXX: is this sufficient for BPF? */
 826         skb_reset_mac_header(skb);
 827         skb->ip_summed = CHECKSUM_UNNECESSARY;
 828         skb->pkt_type = PACKET_OTHERHOST;
 829         skb->protocol = htons(ETH_P_802_2);
 830         memset(skb->cb, 0, sizeof(skb->cb));
 831 
 832         rcu_read_lock();
 833         list_for_each_entry_rcu(sdata, &local->interfaces, list) {
 834                 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
 835                         if (!ieee80211_sdata_running(sdata))
 836                                 continue;
 837 
 838                         if ((sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) &&
 839                             !send_to_cooked)
 840                                 continue;
 841 
 842                         if (prev_dev) {
 843                                 skb2 = skb_clone(skb, GFP_ATOMIC);
 844                                 if (skb2) {
 845                                         skb2->dev = prev_dev;
 846                                         netif_rx(skb2);
 847                                 }
 848                         }
 849 
 850                         prev_dev = sdata->dev;
 851                 }
 852         }
 853         if (prev_dev) {
 854                 skb->dev = prev_dev;
 855                 netif_rx(skb);
 856                 skb = NULL;
 857         }
 858         rcu_read_unlock();
 859         dev_kfree_skb(skb);
 860 }
 861 
 862 static void __ieee80211_tx_status(struct ieee80211_hw *hw,
 863                                   struct ieee80211_tx_status *status)
 864 {
 865         struct sk_buff *skb = status->skb;
 866         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 867         struct ieee80211_local *local = hw_to_local(hw);
 868         struct ieee80211_tx_info *info = status->info;
 869         struct sta_info *sta;
 870         __le16 fc;
 871         struct ieee80211_supported_band *sband;
 872         int retry_count;
 873         int rates_idx;
 874         bool send_to_cooked;
 875         bool acked;
 876         struct ieee80211_bar *bar;
 877         int shift = 0;
 878         int tid = IEEE80211_NUM_TIDS;
 879 
 880         rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
 881 
 882         sband = local->hw.wiphy->bands[info->band];
 883         fc = hdr->frame_control;
 884 
 885         if (status->sta) {
 886                 sta = container_of(status->sta, struct sta_info, sta);
 887                 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
 888 
 889                 if (info->flags & IEEE80211_TX_STATUS_EOSP)
 890                         clear_sta_flag(sta, WLAN_STA_SP);
 891 
 892                 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
 893 
 894                 /* mesh Peer Service Period support */
 895                 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
 896                     ieee80211_is_data_qos(fc))
 897                         ieee80211_mpsp_trigger_process(
 898                                 ieee80211_get_qos_ctl(hdr), sta, true, acked);
 899 
 900                 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
 901                         /*
 902                          * The STA is in power save mode, so assume
 903                          * that this TX packet failed because of that.
 904                          */
 905                         ieee80211_handle_filtered_frame(local, sta, skb);
 906                         return;
 907                 }
 908 
 909                 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
 910                     (ieee80211_is_data(hdr->frame_control)) &&
 911                     (rates_idx != -1))
 912                         sta->tx_stats.last_rate =
 913                                 info->status.rates[rates_idx];
 914 
 915                 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
 916                     (ieee80211_is_data_qos(fc))) {
 917                         u16 ssn;
 918                         u8 *qc;
 919 
 920                         qc = ieee80211_get_qos_ctl(hdr);
 921                         tid = qc[0] & 0xf;
 922                         ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
 923                                                 & IEEE80211_SCTL_SEQ);
 924                         ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
 925                                            tid, ssn);
 926                 } else if (ieee80211_is_data_qos(fc)) {
 927                         u8 *qc = ieee80211_get_qos_ctl(hdr);
 928 
 929                         tid = qc[0] & 0xf;
 930                 }
 931 
 932                 if (!acked && ieee80211_is_back_req(fc)) {
 933                         u16 control;
 934 
 935                         /*
 936                          * BAR failed, store the last SSN and retry sending
 937                          * the BAR when the next unicast transmission on the
 938                          * same TID succeeds.
 939                          */
 940                         bar = (struct ieee80211_bar *) skb->data;
 941                         control = le16_to_cpu(bar->control);
 942                         if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
 943                                 u16 ssn = le16_to_cpu(bar->start_seq_num);
 944 
 945                                 tid = (control &
 946                                        IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
 947                                       IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
 948 
 949                                 ieee80211_set_bar_pending(sta, tid, ssn);
 950                         }
 951                 }
 952 
 953                 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
 954                         ieee80211_handle_filtered_frame(local, sta, skb);
 955                         return;
 956                 } else {
 957                         if (!acked)
 958                                 sta->status_stats.retry_failed++;
 959                         sta->status_stats.retry_count += retry_count;
 960 
 961                         if (ieee80211_is_data_present(fc)) {
 962                                 if (!acked)
 963                                         sta->status_stats.msdu_failed[tid]++;
 964 
 965                                 sta->status_stats.msdu_retries[tid] +=
 966                                         retry_count;
 967                         }
 968                 }
 969 
 970                 rate_control_tx_status(local, sband, status);
 971                 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
 972                         ieee80211s_update_metric(local, sta, status);
 973 
 974                 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
 975                         ieee80211_frame_acked(sta, skb);
 976 
 977                 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
 978                     ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
 979                         ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
 980                                                 acked, info->status.tx_time);
 981 
 982                 if (info->status.tx_time &&
 983                     wiphy_ext_feature_isset(local->hw.wiphy,
 984                                             NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
 985                         ieee80211_sta_register_airtime(&sta->sta, tid,
 986                                                        info->status.tx_time, 0);
 987 
 988                 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
 989                         if (info->flags & IEEE80211_TX_STAT_ACK) {
 990                                 if (sta->status_stats.lost_packets)
 991                                         sta->status_stats.lost_packets = 0;
 992 
 993                                 /* Track when last TDLS packet was ACKed */
 994                                 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
 995                                         sta->status_stats.last_tdls_pkt_time =
 996                                                 jiffies;
 997                         } else {
 998                                 ieee80211_lost_packet(sta, info);
 999                         }
1000                 }
1001         }
1002 
1003         /* SNMP counters
1004          * Fragments are passed to low-level drivers as separate skbs, so these
1005          * are actually fragments, not frames. Update frame counters only for
1006          * the first fragment of the frame. */
1007         if ((info->flags & IEEE80211_TX_STAT_ACK) ||
1008             (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
1009                 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
1010                         I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1011                         if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
1012                                 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1013                         if (retry_count > 0)
1014                                 I802_DEBUG_INC(local->dot11RetryCount);
1015                         if (retry_count > 1)
1016                                 I802_DEBUG_INC(local->dot11MultipleRetryCount);
1017                 }
1018 
1019                 /* This counter shall be incremented for an acknowledged MPDU
1020                  * with an individual address in the address 1 field or an MPDU
1021                  * with a multicast address in the address 1 field of type Data
1022                  * or Management. */
1023                 if (!is_multicast_ether_addr(hdr->addr1) ||
1024                     ieee80211_is_data(fc) ||
1025                     ieee80211_is_mgmt(fc))
1026                         I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
1027         } else {
1028                 if (ieee80211_is_first_frag(hdr->seq_ctrl))
1029                         I802_DEBUG_INC(local->dot11FailedCount);
1030         }
1031 
1032         if (ieee80211_is_any_nullfunc(fc) &&
1033             ieee80211_has_pm(fc) &&
1034             ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
1035             !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
1036             local->ps_sdata && !(local->scanning)) {
1037                 if (info->flags & IEEE80211_TX_STAT_ACK) {
1038                         local->ps_sdata->u.mgd.flags |=
1039                                         IEEE80211_STA_NULLFUNC_ACKED;
1040                 } else
1041                         mod_timer(&local->dynamic_ps_timer, jiffies +
1042                                         msecs_to_jiffies(10));
1043         }
1044 
1045         ieee80211_report_used_skb(local, skb, false);
1046 
1047         /* this was a transmitted frame, but now we want to reuse it */
1048         skb_orphan(skb);
1049 
1050         /* Need to make a copy before skb->cb gets cleared */
1051         send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
1052                          !(ieee80211_is_data(fc));
1053 
1054         /*
1055          * This is a bit racy but we can avoid a lot of work
1056          * with this test...
1057          */
1058         if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
1059                 dev_kfree_skb(skb);
1060                 return;
1061         }
1062 
1063         /* send to monitor interfaces */
1064         ieee80211_tx_monitor(local, skb, sband, retry_count, shift,
1065                              send_to_cooked, status);
1066 }
1067 
1068 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
1069 {
1070         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
1071         struct ieee80211_local *local = hw_to_local(hw);
1072         struct ieee80211_tx_status status = {
1073                 .skb = skb,
1074                 .info = IEEE80211_SKB_CB(skb),
1075         };
1076         struct rhlist_head *tmp;
1077         struct sta_info *sta;
1078 
1079         rcu_read_lock();
1080 
1081         for_each_sta_info(local, hdr->addr1, sta, tmp) {
1082                 /* skip wrong virtual interface */
1083                 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
1084                         continue;
1085 
1086                 status.sta = &sta->sta;
1087                 break;
1088         }
1089 
1090         __ieee80211_tx_status(hw, &status);
1091         rcu_read_unlock();
1092 }
1093 EXPORT_SYMBOL(ieee80211_tx_status);
1094 
1095 void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
1096                              struct ieee80211_tx_status *status)
1097 {
1098         struct ieee80211_local *local = hw_to_local(hw);
1099         struct ieee80211_tx_info *info = status->info;
1100         struct ieee80211_sta *pubsta = status->sta;
1101         struct ieee80211_supported_band *sband;
1102         int retry_count;
1103         bool acked, noack_success;
1104 
1105         if (status->skb)
1106                 return __ieee80211_tx_status(hw, status);
1107 
1108         if (!status->sta)
1109                 return;
1110 
1111         ieee80211_tx_get_rates(hw, info, &retry_count);
1112 
1113         sband = hw->wiphy->bands[info->band];
1114 
1115         acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
1116         noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
1117 
1118         if (pubsta) {
1119                 struct sta_info *sta;
1120 
1121                 sta = container_of(pubsta, struct sta_info, sta);
1122 
1123                 if (!acked)
1124                         sta->status_stats.retry_failed++;
1125                 sta->status_stats.retry_count += retry_count;
1126 
1127                 if (acked) {
1128                         sta->status_stats.last_ack = jiffies;
1129 
1130                         if (sta->status_stats.lost_packets)
1131                                 sta->status_stats.lost_packets = 0;
1132 
1133                         /* Track when last TDLS packet was ACKed */
1134                         if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
1135                                 sta->status_stats.last_tdls_pkt_time = jiffies;
1136                 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
1137                         return;
1138                 } else {
1139                         ieee80211_lost_packet(sta, info);
1140                 }
1141 
1142                 rate_control_tx_status(local, sband, status);
1143                 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
1144                         ieee80211s_update_metric(local, sta, status);
1145         }
1146 
1147         if (acked || noack_success) {
1148                 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
1149                 if (!pubsta)
1150                         I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
1151                 if (retry_count > 0)
1152                         I802_DEBUG_INC(local->dot11RetryCount);
1153                 if (retry_count > 1)
1154                         I802_DEBUG_INC(local->dot11MultipleRetryCount);
1155         } else {
1156                 I802_DEBUG_INC(local->dot11FailedCount);
1157         }
1158 }
1159 EXPORT_SYMBOL(ieee80211_tx_status_ext);
1160 
1161 void ieee80211_tx_rate_update(struct ieee80211_hw *hw,
1162                               struct ieee80211_sta *pubsta,
1163                               struct ieee80211_tx_info *info)
1164 {
1165         struct ieee80211_local *local = hw_to_local(hw);
1166         struct ieee80211_supported_band *sband = hw->wiphy->bands[info->band];
1167         struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1168         struct ieee80211_tx_status status = {
1169                 .info = info,
1170                 .sta = pubsta,
1171         };
1172 
1173         rate_control_tx_status(local, sband, &status);
1174 
1175         if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL))
1176                 sta->tx_stats.last_rate = info->status.rates[0];
1177 }
1178 EXPORT_SYMBOL(ieee80211_tx_rate_update);
1179 
1180 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
1181 {
1182         struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
1183         cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
1184                                     num_packets, GFP_ATOMIC);
1185 }
1186 EXPORT_SYMBOL(ieee80211_report_low_ack);
1187 
1188 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
1189 {
1190         struct ieee80211_local *local = hw_to_local(hw);
1191 
1192         ieee80211_report_used_skb(local, skb, true);
1193         dev_kfree_skb_any(skb);
1194 }
1195 EXPORT_SYMBOL(ieee80211_free_txskb);
1196 
1197 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1198                               struct sk_buff_head *skbs)
1199 {
1200         struct sk_buff *skb;
1201 
1202         while ((skb = __skb_dequeue(skbs)))
1203                 ieee80211_free_txskb(hw, skb);
1204 }