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 2008-2010 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
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.
13 #include <linux/export.h>
14 #include <linux/etherdevice.h>
15 #include <net/mac80211.h>
16 #include <asm/unaligned.h>
17 #include "ieee80211_i.h"
24 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
27 struct ieee80211_local *local = hw_to_local(hw);
28 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
31 skb->pkt_type = IEEE80211_TX_STATUS_MSG;
32 skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
33 &local->skb_queue : &local->skb_queue_unreliable, skb);
34 tmp = skb_queue_len(&local->skb_queue) +
35 skb_queue_len(&local->skb_queue_unreliable);
36 while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
37 (skb = skb_dequeue(&local->skb_queue_unreliable))) {
38 ieee80211_free_txskb(hw, skb);
40 I802_DEBUG_INC(local->tx_status_drop);
42 tasklet_schedule(&local->tasklet);
44 EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);
46 static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
50 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
51 struct ieee80211_hdr *hdr = (void *)skb->data;
55 * This skb 'survived' a round-trip through the driver, and
56 * hopefully the driver didn't mangle it too badly. However,
57 * we can definitely not rely on the control information
58 * being correct. Clear it so we don't get junk there, and
59 * indicate that it needs new processing, but must not be
60 * modified/encrypted again.
62 memset(&info->control, 0, sizeof(info->control));
64 info->control.jiffies = jiffies;
65 info->control.vif = &sta->sdata->vif;
66 info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
67 IEEE80211_TX_INTFL_RETRANSMISSION;
68 info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;
70 sta->status_stats.filtered++;
73 * Clear more-data bit on filtered frames, it might be set
74 * but later frames might time out so it might have to be
75 * clear again ... It's all rather unlikely (this frame
76 * should time out first, right?) but let's not confuse
77 * peers unnecessarily.
79 if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
80 hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);
82 if (ieee80211_is_data_qos(hdr->frame_control)) {
83 u8 *p = ieee80211_get_qos_ctl(hdr);
84 int tid = *p & IEEE80211_QOS_CTL_TID_MASK;
87 * Clear EOSP if set, this could happen e.g.
88 * if an absence period (us being a P2P GO)
91 if (*p & IEEE80211_QOS_CTL_EOSP)
92 *p &= ~IEEE80211_QOS_CTL_EOSP;
93 ac = ieee802_1d_to_ac[tid & 7];
99 * Clear the TX filter mask for this STA when sending the next
100 * packet. If the STA went to power save mode, this will happen
101 * when it wakes up for the next time.
103 set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
104 ieee80211_clear_fast_xmit(sta);
107 * This code races in the following way:
109 * (1) STA sends frame indicating it will go to sleep and does so
110 * (2) hardware/firmware adds STA to filter list, passes frame up
111 * (3) hardware/firmware processes TX fifo and suppresses a frame
112 * (4) we get TX status before having processed the frame and
113 * knowing that the STA has gone to sleep.
115 * This is actually quite unlikely even when both those events are
116 * processed from interrupts coming in quickly after one another or
117 * even at the same time because we queue both TX status events and
118 * RX frames to be processed by a tasklet and process them in the
119 * same order that they were received or TX status last. Hence, there
120 * is no race as long as the frame RX is processed before the next TX
121 * status, which drivers can ensure, see below.
123 * Note that this can only happen if the hardware or firmware can
124 * actually add STAs to the filter list, if this is done by the
125 * driver in response to set_tim() (which will only reduce the race
126 * this whole filtering tries to solve, not completely solve it)
127 * this situation cannot happen.
129 * To completely solve this race drivers need to make sure that they
130 * (a) don't mix the irq-safe/not irq-safe TX status/RX processing
132 * (b) always process RX events before TX status events if ordering
133 * can be unknown, for example with different interrupt status
135 * (c) if PS mode transitions are manual (i.e. the flag
136 * %IEEE80211_HW_AP_LINK_PS is set), always process PS state
137 * changes before calling TX status events if ordering can be
140 if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
141 skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
142 skb_queue_tail(&sta->tx_filtered[ac], skb);
143 sta_info_recalc_tim(sta);
145 if (!timer_pending(&local->sta_cleanup))
146 mod_timer(&local->sta_cleanup,
147 round_jiffies(jiffies +
148 STA_INFO_CLEANUP_INTERVAL));
152 if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
153 !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
154 /* Software retry the packet once */
155 info->flags |= IEEE80211_TX_INTFL_RETRIED;
156 ieee80211_add_pending_skb(local, skb);
160 ps_dbg_ratelimited(sta->sdata,
161 "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
162 skb_queue_len(&sta->tx_filtered[ac]),
163 !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
164 ieee80211_free_txskb(&local->hw, skb);
167 static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
169 struct tid_ampdu_tx *tid_tx;
171 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
172 if (!tid_tx || !tid_tx->bar_pending)
175 tid_tx->bar_pending = false;
176 ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
179 static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
181 struct ieee80211_mgmt *mgmt = (void *) skb->data;
182 struct ieee80211_local *local = sta->local;
183 struct ieee80211_sub_if_data *sdata = sta->sdata;
185 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
186 sta->rx_stats.last_rx = jiffies;
188 if (ieee80211_is_data_qos(mgmt->frame_control)) {
189 struct ieee80211_hdr *hdr = (void *) skb->data;
190 u8 *qc = ieee80211_get_qos_ctl(hdr);
191 u16 tid = qc[0] & 0xf;
193 ieee80211_check_pending_bar(sta, hdr->addr1, tid);
196 if (ieee80211_is_action(mgmt->frame_control) &&
197 !ieee80211_has_protected(mgmt->frame_control) &&
198 mgmt->u.action.category == WLAN_CATEGORY_HT &&
199 mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
200 ieee80211_sdata_running(sdata)) {
201 enum ieee80211_smps_mode smps_mode;
203 switch (mgmt->u.action.u.ht_smps.smps_control) {
204 case WLAN_HT_SMPS_CONTROL_DYNAMIC:
205 smps_mode = IEEE80211_SMPS_DYNAMIC;
207 case WLAN_HT_SMPS_CONTROL_STATIC:
208 smps_mode = IEEE80211_SMPS_STATIC;
210 case WLAN_HT_SMPS_CONTROL_DISABLED:
211 default: /* shouldn't happen since we don't send that */
212 smps_mode = IEEE80211_SMPS_OFF;
216 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
218 * This update looks racy, but isn't -- if we come
219 * here we've definitely got a station that we're
220 * talking to, and on a managed interface that can
221 * only be the AP. And the only other place updating
222 * this variable in managed mode is before association.
224 sdata->smps_mode = smps_mode;
225 ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
226 } else if (sdata->vif.type == NL80211_IFTYPE_AP ||
227 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
228 sta->known_smps_mode = smps_mode;
233 static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
235 struct tid_ampdu_tx *tid_tx;
237 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
241 tid_tx->failed_bar_ssn = ssn;
242 tid_tx->bar_pending = true;
245 static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info)
247 int len = sizeof(struct ieee80211_radiotap_header);
249 /* IEEE80211_RADIOTAP_RATE rate */
250 if (info->status.rates[0].idx >= 0 &&
251 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
252 IEEE80211_TX_RC_VHT_MCS)))
255 /* IEEE80211_RADIOTAP_TX_FLAGS */
258 /* IEEE80211_RADIOTAP_DATA_RETRIES */
261 /* IEEE80211_RADIOTAP_MCS
262 * IEEE80211_RADIOTAP_VHT */
263 if (info->status.rates[0].idx >= 0) {
264 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
266 else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
267 len = ALIGN(len, 2) + 12;
274 ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
275 struct ieee80211_supported_band *sband,
276 struct sk_buff *skb, int retry_count,
277 int rtap_len, int shift)
279 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
280 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
281 struct ieee80211_radiotap_header *rthdr;
285 rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len);
287 memset(rthdr, 0, rtap_len);
288 rthdr->it_len = cpu_to_le16(rtap_len);
290 cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
291 (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
292 pos = (unsigned char *)(rthdr + 1);
295 * XXX: Once radiotap gets the bitmap reset thing the vendor
296 * extensions proposal contains, we can actually report
297 * the whole set of tries we did.
300 /* IEEE80211_RADIOTAP_RATE */
301 if (info->status.rates[0].idx >= 0 &&
302 !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
303 IEEE80211_TX_RC_VHT_MCS))) {
306 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
307 rate = sband->bitrates[info->status.rates[0].idx].bitrate;
308 *pos = DIV_ROUND_UP(rate, 5 * (1 << shift));
309 /* padding for tx flags */
313 /* IEEE80211_RADIOTAP_TX_FLAGS */
315 if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
316 !is_multicast_ether_addr(hdr->addr1))
317 txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;
319 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
320 txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
321 if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
322 txflags |= IEEE80211_RADIOTAP_F_TX_RTS;
324 put_unaligned_le16(txflags, pos);
327 /* IEEE80211_RADIOTAP_DATA_RETRIES */
328 /* for now report the total retry_count */
332 if (info->status.rates[0].idx < 0)
335 /* IEEE80211_RADIOTAP_MCS
336 * IEEE80211_RADIOTAP_VHT */
337 if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
338 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
339 pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
340 IEEE80211_RADIOTAP_MCS_HAVE_GI |
341 IEEE80211_RADIOTAP_MCS_HAVE_BW;
342 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
343 pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
344 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
345 pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
346 if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
347 pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
348 pos[2] = info->status.rates[0].idx;
350 } else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
351 u16 known = local->hw.radiotap_vht_details &
352 (IEEE80211_RADIOTAP_VHT_KNOWN_GI |
353 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);
355 rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);
357 /* required alignment from rthdr */
358 pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);
360 /* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
361 put_unaligned_le16(known, pos);
364 /* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
365 if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
366 *pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
370 if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
372 else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
374 else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
376 else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
381 *pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
382 ieee80211_rate_get_vht_nss(&info->status.rates[0]);
389 /* u16 partial_aid */
395 * Handles the tx for TDLS teardown frames.
396 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
398 static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
399 struct ieee80211_sub_if_data *sdata,
400 struct sk_buff *skb, u32 flags)
402 struct sk_buff *teardown_skb;
403 struct sk_buff *orig_teardown_skb;
404 bool is_teardown = false;
406 /* Get the teardown data we need and free the lock */
407 spin_lock(&sdata->u.mgd.teardown_lock);
408 teardown_skb = sdata->u.mgd.teardown_skb;
409 orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
410 if ((skb == orig_teardown_skb) && teardown_skb) {
411 sdata->u.mgd.teardown_skb = NULL;
412 sdata->u.mgd.orig_teardown_skb = NULL;
415 spin_unlock(&sdata->u.mgd.teardown_lock);
418 /* This mechanism relies on being able to get ACKs */
419 WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));
421 /* Check if peer has ACKed */
422 if (flags & IEEE80211_TX_STAT_ACK) {
423 dev_kfree_skb_any(teardown_skb);
426 "TDLS Resending teardown through AP\n");
428 ieee80211_subif_start_xmit(teardown_skb, skb->dev);
433 static struct ieee80211_sub_if_data *
434 ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
436 struct ieee80211_sub_if_data *sdata;
439 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
443 if (skb->dev == sdata->dev)
450 return rcu_dereference(local->p2p_sdata);
453 static void ieee80211_report_ack_skb(struct ieee80211_local *local,
454 struct ieee80211_tx_info *info,
455 bool acked, bool dropped)
460 spin_lock_irqsave(&local->ack_status_lock, flags);
461 skb = idr_find(&local->ack_status_frames, info->ack_frame_id);
463 idr_remove(&local->ack_status_frames, info->ack_frame_id);
464 spin_unlock_irqrestore(&local->ack_status_lock, flags);
469 if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
470 u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
471 struct ieee80211_sub_if_data *sdata;
472 struct ieee80211_hdr *hdr = (void *)skb->data;
475 sdata = ieee80211_sdata_from_skb(local, skb);
477 if (ieee80211_is_any_nullfunc(hdr->frame_control))
478 cfg80211_probe_status(sdata->dev, hdr->addr1,
482 cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
488 dev_kfree_skb_any(skb);
489 } else if (dropped) {
490 dev_kfree_skb_any(skb);
493 skb_complete_wifi_ack(skb, acked);
497 static void ieee80211_report_used_skb(struct ieee80211_local *local,
498 struct sk_buff *skb, bool dropped)
500 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
501 struct ieee80211_hdr *hdr = (void *)skb->data;
502 bool acked = info->flags & IEEE80211_TX_STAT_ACK;
507 if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
508 struct ieee80211_sub_if_data *sdata;
512 sdata = ieee80211_sdata_from_skb(local, skb);
517 unsigned int hdr_size =
518 ieee80211_hdrlen(hdr->frame_control);
520 /* Check to see if packet is a TDLS teardown packet */
521 if (ieee80211_is_data(hdr->frame_control) &&
522 (ieee80211_get_tdls_action(skb, hdr_size) ==
524 ieee80211_tdls_td_tx_handle(local, sdata, skb,
527 ieee80211_mgd_conn_tx_status(sdata,
533 } else if (info->ack_frame_id) {
534 ieee80211_report_ack_skb(local, info, acked, dropped);
539 * Use a static threshold for now, best value to be determined
541 * Should it depend on:
542 * - on # of retransmissions
543 * - current throughput (higher value for higher tpt)?
545 #define STA_LOST_PKT_THRESHOLD 50
546 #define STA_LOST_TDLS_PKT_THRESHOLD 10
547 #define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
549 static void ieee80211_lost_packet(struct sta_info *sta,
550 struct ieee80211_tx_info *info)
552 /* This packet was aggregated but doesn't carry status info */
553 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
554 !(info->flags & IEEE80211_TX_STAT_AMPDU))
557 sta->status_stats.lost_packets++;
558 if (!sta->sta.tdls &&
559 sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
563 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
564 * of the last packets were lost, and that no ACK was received in the
565 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
569 (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
571 sta->status_stats.last_tdls_pkt_time +
572 STA_LOST_TDLS_PKT_TIME)))
575 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
576 sta->status_stats.lost_packets, GFP_ATOMIC);
577 sta->status_stats.lost_packets = 0;
580 static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
581 struct ieee80211_tx_info *info,
588 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
589 if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
590 !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
591 /* just the first aggr frame carry status info */
592 info->status.rates[i].idx = -1;
593 info->status.rates[i].count = 0;
595 } else if (info->status.rates[i].idx < 0) {
597 } else if (i >= hw->max_report_rates) {
598 /* the HW cannot have attempted that rate */
599 info->status.rates[i].idx = -1;
600 info->status.rates[i].count = 0;
604 count += info->status.rates[i].count;
611 *retry_count = count;
615 void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
616 struct ieee80211_sta *pubsta,
617 struct ieee80211_tx_info *info)
619 struct ieee80211_local *local = hw_to_local(hw);
620 struct ieee80211_supported_band *sband;
623 bool acked, noack_success;
625 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
627 sband = hw->wiphy->bands[info->band];
629 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
630 noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
633 struct sta_info *sta;
635 sta = container_of(pubsta, struct sta_info, sta);
638 sta->status_stats.retry_failed++;
639 sta->status_stats.retry_count += retry_count;
642 sta->rx_stats.last_rx = jiffies;
644 if (sta->status_stats.lost_packets)
645 sta->status_stats.lost_packets = 0;
647 /* Track when last TDLS packet was ACKed */
648 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
649 sta->status_stats.last_tdls_pkt_time = jiffies;
650 } else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
653 ieee80211_lost_packet(sta, info);
656 rate_control_tx_status_noskb(local, sband, sta, info);
659 if (acked || noack_success) {
660 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
662 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
664 I802_DEBUG_INC(local->dot11RetryCount);
666 I802_DEBUG_INC(local->dot11MultipleRetryCount);
668 I802_DEBUG_INC(local->dot11FailedCount);
671 EXPORT_SYMBOL(ieee80211_tx_status_noskb);
673 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
674 struct ieee80211_supported_band *sband,
675 int retry_count, int shift, bool send_to_cooked)
677 struct sk_buff *skb2;
678 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
679 struct ieee80211_sub_if_data *sdata;
680 struct net_device *prev_dev = NULL;
683 /* send frame to monitor interfaces now */
684 rtap_len = ieee80211_tx_radiotap_len(info);
685 if (WARN_ON_ONCE(skb_headroom(skb) < rtap_len)) {
686 pr_err("ieee80211_tx_status: headroom too small\n");
690 ieee80211_add_tx_radiotap_header(local, sband, skb, retry_count,
693 /* XXX: is this sufficient for BPF? */
694 skb_set_mac_header(skb, 0);
695 skb->ip_summed = CHECKSUM_UNNECESSARY;
696 skb->pkt_type = PACKET_OTHERHOST;
697 skb->protocol = htons(ETH_P_802_2);
698 memset(skb->cb, 0, sizeof(skb->cb));
701 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
702 if (sdata->vif.type == NL80211_IFTYPE_MONITOR) {
703 if (!ieee80211_sdata_running(sdata))
706 if ((sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) &&
711 skb2 = skb_clone(skb, GFP_ATOMIC);
713 skb2->dev = prev_dev;
718 prev_dev = sdata->dev;
730 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
732 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
733 struct ieee80211_local *local = hw_to_local(hw);
734 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
736 struct ieee80211_supported_band *sband;
737 struct sta_info *sta;
738 struct rhash_head *tmp;
743 struct ieee80211_bar *bar;
745 int tid = IEEE80211_NUM_TIDS;
746 const struct bucket_table *tbl;
748 rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
752 sband = local->hw.wiphy->bands[info->band];
753 fc = hdr->frame_control;
755 tbl = rht_dereference_rcu(local->sta_hash.tbl, &local->sta_hash);
757 for_each_sta_info(local, tbl, hdr->addr1, sta, tmp) {
758 /* skip wrong virtual interface */
759 if (!ether_addr_equal(hdr->addr2, sta->sdata->vif.addr))
762 shift = ieee80211_vif_get_shift(&sta->sdata->vif);
764 if (info->flags & IEEE80211_TX_STATUS_EOSP)
765 clear_sta_flag(sta, WLAN_STA_SP);
767 acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
768 if (!acked && test_sta_flag(sta, WLAN_STA_PS_STA)) {
770 * The STA is in power save mode, so assume
771 * that this TX packet failed because of that.
773 ieee80211_handle_filtered_frame(local, sta, skb);
778 /* mesh Peer Service Period support */
779 if (ieee80211_vif_is_mesh(&sta->sdata->vif) &&
780 ieee80211_is_data_qos(fc))
781 ieee80211_mpsp_trigger_process(
782 ieee80211_get_qos_ctl(hdr),
785 if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL) &&
786 (ieee80211_is_data(hdr->frame_control)) &&
788 sta->tx_stats.last_rate =
789 info->status.rates[rates_idx];
791 if ((info->flags & IEEE80211_TX_STAT_AMPDU_NO_BACK) &&
792 (ieee80211_is_data_qos(fc))) {
796 qc = ieee80211_get_qos_ctl(hdr);
798 ssn = ((le16_to_cpu(hdr->seq_ctrl) + 0x10)
799 & IEEE80211_SCTL_SEQ);
800 ieee80211_send_bar(&sta->sdata->vif, hdr->addr1,
802 } else if (ieee80211_is_data_qos(fc)) {
803 u8 *qc = ieee80211_get_qos_ctl(hdr);
808 if (!acked && ieee80211_is_back_req(fc)) {
812 * BAR failed, store the last SSN and retry sending
813 * the BAR when the next unicast transmission on the
816 bar = (struct ieee80211_bar *) skb->data;
817 control = le16_to_cpu(bar->control);
818 if (!(control & IEEE80211_BAR_CTRL_MULTI_TID)) {
819 u16 ssn = le16_to_cpu(bar->start_seq_num);
822 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
823 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
825 ieee80211_set_bar_pending(sta, tid, ssn);
829 if (info->flags & IEEE80211_TX_STAT_TX_FILTERED) {
830 ieee80211_handle_filtered_frame(local, sta, skb);
835 sta->status_stats.retry_failed++;
836 sta->status_stats.retry_count += retry_count;
838 if (ieee80211_is_data_present(fc)) {
840 sta->status_stats.msdu_failed[tid]++;
842 sta->status_stats.msdu_retries[tid] +=
847 rate_control_tx_status(local, sband, sta, skb);
848 if (ieee80211_vif_is_mesh(&sta->sdata->vif))
849 ieee80211s_update_metric(local, sta, skb);
851 if (!(info->flags & IEEE80211_TX_CTL_INJECTED) && acked)
852 ieee80211_frame_acked(sta, skb);
854 if ((sta->sdata->vif.type == NL80211_IFTYPE_STATION) &&
855 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
856 ieee80211_sta_tx_notify(sta->sdata, (void *) skb->data,
857 acked, info->status.tx_time);
859 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) {
860 if (info->flags & IEEE80211_TX_STAT_ACK) {
861 if (sta->status_stats.lost_packets)
862 sta->status_stats.lost_packets = 0;
864 /* Track when last TDLS packet was ACKed */
865 if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
866 sta->status_stats.last_tdls_pkt_time =
869 ieee80211_lost_packet(sta, info);
876 ieee80211_led_tx(local);
879 * Fragments are passed to low-level drivers as separate skbs, so these
880 * are actually fragments, not frames. Update frame counters only for
881 * the first fragment of the frame. */
882 if ((info->flags & IEEE80211_TX_STAT_ACK) ||
883 (info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED)) {
884 if (ieee80211_is_first_frag(hdr->seq_ctrl)) {
885 I802_DEBUG_INC(local->dot11TransmittedFrameCount);
886 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
887 I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
889 I802_DEBUG_INC(local->dot11RetryCount);
891 I802_DEBUG_INC(local->dot11MultipleRetryCount);
894 /* This counter shall be incremented for an acknowledged MPDU
895 * with an individual address in the address 1 field or an MPDU
896 * with a multicast address in the address 1 field of type Data
898 if (!is_multicast_ether_addr(hdr->addr1) ||
899 ieee80211_is_data(fc) ||
900 ieee80211_is_mgmt(fc))
901 I802_DEBUG_INC(local->dot11TransmittedFragmentCount);
903 if (ieee80211_is_first_frag(hdr->seq_ctrl))
904 I802_DEBUG_INC(local->dot11FailedCount);
907 if (ieee80211_is_any_nullfunc(fc) && ieee80211_has_pm(fc) &&
908 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) &&
909 !(info->flags & IEEE80211_TX_CTL_INJECTED) &&
910 local->ps_sdata && !(local->scanning)) {
911 if (info->flags & IEEE80211_TX_STAT_ACK) {
912 local->ps_sdata->u.mgd.flags |=
913 IEEE80211_STA_NULLFUNC_ACKED;
915 mod_timer(&local->dynamic_ps_timer, jiffies +
916 msecs_to_jiffies(10));
919 ieee80211_report_used_skb(local, skb, false);
921 /* this was a transmitted frame, but now we want to reuse it */
924 /* Need to make a copy before skb->cb gets cleared */
925 send_to_cooked = !!(info->flags & IEEE80211_TX_CTL_INJECTED) ||
926 !(ieee80211_is_data(fc));
929 * This is a bit racy but we can avoid a lot of work
932 if (!local->monitors && (!send_to_cooked || !local->cooked_mntrs)) {
937 /* send to monitor interfaces */
938 ieee80211_tx_monitor(local, skb, sband, retry_count, shift, send_to_cooked);
940 EXPORT_SYMBOL(ieee80211_tx_status);
942 void ieee80211_report_low_ack(struct ieee80211_sta *pubsta, u32 num_packets)
944 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
945 cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
946 num_packets, GFP_ATOMIC);
948 EXPORT_SYMBOL(ieee80211_report_low_ack);
950 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb)
952 struct ieee80211_local *local = hw_to_local(hw);
954 ieee80211_report_used_skb(local, skb, true);
955 dev_kfree_skb_any(skb);
957 EXPORT_SYMBOL(ieee80211_free_txskb);
959 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
960 struct sk_buff_head *skbs)
964 while ((skb = __skb_dequeue(skbs)))
965 ieee80211_free_txskb(hw, skb);