Release 4.11 net/mac80211/status.c

/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
 * Copyright 2008-2010  Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/export.h>
#include <linux/etherdevice.h>
#include <net/mac80211.h>
#include <asm/unaligned.h>
#include "ieee80211_i.h"
#include "rate.h"
#include "mesh.h"
#include "led.h"
#include "wme.h"




void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
				 struct sk_buff *skb)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	int tmp;

	skb->pkt_type = IEEE80211_TX_STATUS_MSG;
	skb_queue_tail(info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS ?
		       &local->skb_queue : &local->skb_queue_unreliable, skb);
	tmp = skb_queue_len(&local->skb_queue) +
		skb_queue_len(&local->skb_queue_unreliable);
	while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT &&
	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
		ieee80211_free_txskb(hw, skb);
		tmp--;
		I802_DEBUG_INC(local->tx_status_drop);
	}
	tasklet_schedule(&local->tasklet);
}
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EXPORT_SYMBOL(ieee80211_tx_status_irqsafe);



static void ieee80211_handle_filtered_frame(struct ieee80211_local *local,
					    struct sta_info *sta,
					    struct sk_buff *skb)
{
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (void *)skb->data;
	int ac;

	if (info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
			   IEEE80211_TX_CTL_AMPDU)) {
		ieee80211_free_txskb(&local->hw, skb);
		return;
	}

	/*
         * This skb 'survived' a round-trip through the driver, and
         * hopefully the driver didn't mangle it too badly. However,
         * we can definitely not rely on the control information
         * being correct. Clear it so we don't get junk there, and
         * indicate that it needs new processing, but must not be
         * modified/encrypted again.
         */
	memset(&info->control, 0, sizeof(info->control));

	info->control.jiffies = jiffies;
	info->control.vif = &sta->sdata->vif;
	info->flags |= IEEE80211_TX_INTFL_NEED_TXPROCESSING |
		       IEEE80211_TX_INTFL_RETRANSMISSION;
	info->flags &= ~IEEE80211_TX_TEMPORARY_FLAGS;

	sta->status_stats.filtered++;

	/*
         * Clear more-data bit on filtered frames, it might be set
         * but later frames might time out so it might have to be
         * clear again ... It's all rather unlikely (this frame
         * should time out first, right?) but let's not confuse
         * peers unnecessarily.
         */
	if (hdr->frame_control & cpu_to_le16(IEEE80211_FCTL_MOREDATA))
		hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA);

	if (ieee80211_is_data_qos(hdr->frame_control)) {
		u8 *p = ieee80211_get_qos_ctl(hdr);
		int tid = *p & IEEE80211_QOS_CTL_TID_MASK;

		/*
                 * Clear EOSP if set, this could happen e.g.
                 * if an absence period (us being a P2P GO)
                 * shortens the SP.
                 */
		if (*p & IEEE80211_QOS_CTL_EOSP)
			*p &= ~IEEE80211_QOS_CTL_EOSP;
		ac = ieee80211_ac_from_tid(tid);
	} else {
		ac = IEEE80211_AC_BE;
	}

	/*
         * Clear the TX filter mask for this STA when sending the next
         * packet. If the STA went to power save mode, this will happen
         * when it wakes up for the next time.
         */
	set_sta_flag(sta, WLAN_STA_CLEAR_PS_FILT);
	ieee80211_clear_fast_xmit(sta);

	/*
         * This code races in the following way:
         *
         *  (1) STA sends frame indicating it will go to sleep and does so
         *  (2) hardware/firmware adds STA to filter list, passes frame up
         *  (3) hardware/firmware processes TX fifo and suppresses a frame
         *  (4) we get TX status before having processed the frame and
         *      knowing that the STA has gone to sleep.
         *
         * This is actually quite unlikely even when both those events are
         * processed from interrupts coming in quickly after one another or
         * even at the same time because we queue both TX status events and
         * RX frames to be processed by a tasklet and process them in the
         * same order that they were received or TX status last. Hence, there
         * is no race as long as the frame RX is processed before the next TX
         * status, which drivers can ensure, see below.
         *
         * Note that this can only happen if the hardware or firmware can
         * actually add STAs to the filter list, if this is done by the
         * driver in response to set_tim() (which will only reduce the race
         * this whole filtering tries to solve, not completely solve it)
         * this situation cannot happen.
         *
         * To completely solve this race drivers need to make sure that they
         *  (a) don't mix the irq-safe/not irq-safe TX status/RX processing
         *      functions and
         *  (b) always process RX events before TX status events if ordering
         *      can be unknown, for example with different interrupt status
         *      bits.
         *  (c) if PS mode transitions are manual (i.e. the flag
         *      %IEEE80211_HW_AP_LINK_PS is set), always process PS state
         *      changes before calling TX status events if ordering can be
         *      unknown.
         */
	if (test_sta_flag(sta, WLAN_STA_PS_STA) &&
	    skb_queue_len(&sta->tx_filtered[ac]) < STA_MAX_TX_BUFFER) {
		skb_queue_tail(&sta->tx_filtered[ac], skb);
		sta_info_recalc_tim(sta);

		if (!timer_pending(&local->sta_cleanup))
			mod_timer(&local->sta_cleanup,
				  round_jiffies(jiffies +
						STA_INFO_CLEANUP_INTERVAL));
		return;
	}

	if (!test_sta_flag(sta, WLAN_STA_PS_STA) &&
	    !(info->flags & IEEE80211_TX_INTFL_RETRIED)) {
		/* Software retry the packet once */
		info->flags |= IEEE80211_TX_INTFL_RETRIED;
		ieee80211_add_pending_skb(local, skb);
		return;
	}

	ps_dbg_ratelimited(sta->sdata,
			   "dropped TX filtered frame, queue_len=%d PS=%d @%lu\n",
			   skb_queue_len(&sta->tx_filtered[ac]),
			   !!test_sta_flag(sta, WLAN_STA_PS_STA), jiffies);
	ieee80211_free_txskb(&local->hw, skb);
}

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static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
{
	struct tid_ampdu_tx *tid_tx;

	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
	if (!tid_tx || !tid_tx->bar_pending)
		return;

	tid_tx->bar_pending = false;
	ieee80211_send_bar(&sta->sdata->vif, addr, tid, tid_tx->failed_bar_ssn);
}

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static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
{
	struct ieee80211_mgmt *mgmt = (void *) skb->data;
	struct ieee80211_local *local = sta->local;
	struct ieee80211_sub_if_data *sdata = sta->sdata;

	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))
		sta->status_stats.last_ack = jiffies;

	if (ieee80211_is_data_qos(mgmt->frame_control)) {
		struct ieee80211_hdr *hdr = (void *) skb->data;
		u8 *qc = ieee80211_get_qos_ctl(hdr);
		u16 tid = qc[0] & 0xf;

		ieee80211_check_pending_bar(sta, hdr->addr1, tid);
	}

	if (ieee80211_is_action(mgmt->frame_control) &&
	    mgmt->u.action.category == WLAN_CATEGORY_HT &&
	    mgmt->u.action.u.ht_smps.action == WLAN_HT_ACTION_SMPS &&
	    ieee80211_sdata_running(sdata)) {
		enum ieee80211_smps_mode smps_mode;

		switch (mgmt->u.action.u.ht_smps.smps_control) {
		case WLAN_HT_SMPS_CONTROL_DYNAMIC:
			smps_mode = IEEE80211_SMPS_DYNAMIC;
			break;
		case WLAN_HT_SMPS_CONTROL_STATIC:
			smps_mode = IEEE80211_SMPS_STATIC;
			break;
		case WLAN_HT_SMPS_CONTROL_DISABLED:
		default: /* shouldn't happen since we don't send that */
			smps_mode = IEEE80211_SMPS_OFF;
			break;
		}

		if (sdata->vif.type == NL80211_IFTYPE_STATION) {
			/*
                         * This update looks racy, but isn't -- if we come
                         * here we've definitely got a station that we're
                         * talking to, and on a managed interface that can
                         * only be the AP. And the only other place updating
                         * this variable in managed mode is before association.
                         */
			sdata->smps_mode = smps_mode;
			ieee80211_queue_work(&local->hw, &sdata->recalc_smps);
		} else if (sdata->vif.type == NL80211_IFTYPE_AP ||
			   sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
			sta->known_smps_mode = smps_mode;
		}
	}
}

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static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
{
	struct tid_ampdu_tx *tid_tx;

	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
	if (!tid_tx)
		return;

	tid_tx->failed_bar_ssn = ssn;
	tid_tx->bar_pending = true;
}

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static int ieee80211_tx_radiotap_len(struct ieee80211_tx_info *info)
{
	int len = sizeof(struct ieee80211_radiotap_header);

	/* IEEE80211_RADIOTAP_RATE rate */
	if (info->status.rates[0].idx >= 0 &&
	    !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
					     IEEE80211_TX_RC_VHT_MCS)))
		len += 2;

	/* IEEE80211_RADIOTAP_TX_FLAGS */
	len += 2;

	/* IEEE80211_RADIOTAP_DATA_RETRIES */
	len += 1;

	/* IEEE80211_RADIOTAP_MCS
         * IEEE80211_RADIOTAP_VHT */
	if (info->status.rates[0].idx >= 0) {
		if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS)
			len += 3;
		else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS)
			len = ALIGN(len, 2) + 12;
	}

	return len;
}

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static void

ieee80211_add_tx_radiotap_header(struct ieee80211_local *local,
				 struct ieee80211_supported_band *sband,
				 struct sk_buff *skb, int retry_count,
				 int rtap_len, int shift)
{
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
	struct ieee80211_radiotap_header *rthdr;
	unsigned char *pos;
	u16 txflags;

	rthdr = (struct ieee80211_radiotap_header *) skb_push(skb, rtap_len);

	memset(rthdr, 0, rtap_len);
	rthdr->it_len = cpu_to_le16(rtap_len);
	rthdr->it_present =
		cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) |
			    (1 << IEEE80211_RADIOTAP_DATA_RETRIES));
	pos = (unsigned char *)(rthdr + 1);

	/*
         * XXX: Once radiotap gets the bitmap reset thing the vendor
         *      extensions proposal contains, we can actually report
         *      the whole set of tries we did.
         */

	/* IEEE80211_RADIOTAP_RATE */
	if (info->status.rates[0].idx >= 0 &&
	    !(info->status.rates[0].flags & (IEEE80211_TX_RC_MCS |
					     IEEE80211_TX_RC_VHT_MCS))) {
		u16 rate;

		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_RATE);
		rate = sband->bitrates[info->status.rates[0].idx].bitrate;
		*pos = DIV_ROUND_UP(rate, 5 * (1 << shift));
		/* padding for tx flags */
		pos += 2;
	}

	/* IEEE80211_RADIOTAP_TX_FLAGS */
	txflags = 0;
	if (!(info->flags & IEEE80211_TX_STAT_ACK) &&
	    !is_multicast_ether_addr(hdr->addr1))
		txflags |= IEEE80211_RADIOTAP_F_TX_FAIL;

	if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
		txflags |= IEEE80211_RADIOTAP_F_TX_CTS;
	if (info->status.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
		txflags |= IEEE80211_RADIOTAP_F_TX_RTS;

	put_unaligned_le16(txflags, pos);
	pos += 2;

	/* IEEE80211_RADIOTAP_DATA_RETRIES */
	/* for now report the total retry_count */
	*pos = retry_count;
	pos++;

	if (info->status.rates[0].idx < 0)
		return;

	/* IEEE80211_RADIOTAP_MCS
         * IEEE80211_RADIOTAP_VHT */
	if (info->status.rates[0].flags & IEEE80211_TX_RC_MCS) {
		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_MCS);
		pos[0] = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
			 IEEE80211_RADIOTAP_MCS_HAVE_GI |
			 IEEE80211_RADIOTAP_MCS_HAVE_BW;
		if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
			pos[1] |= IEEE80211_RADIOTAP_MCS_SGI;
		if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
			pos[1] |= IEEE80211_RADIOTAP_MCS_BW_40;
		if (info->status.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD)
			pos[1] |= IEEE80211_RADIOTAP_MCS_FMT_GF;
		pos[2] = info->status.rates[0].idx;
		pos += 3;
	} else if (info->status.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
		u16 known = local->hw.radiotap_vht_details &
			(IEEE80211_RADIOTAP_VHT_KNOWN_GI |
			 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH);

		rthdr->it_present |= cpu_to_le32(1 << IEEE80211_RADIOTAP_VHT);

		/* required alignment from rthdr */
		pos = (u8 *)rthdr + ALIGN(pos - (u8 *)rthdr, 2);

		/* u16 known - IEEE80211_RADIOTAP_VHT_KNOWN_* */
		put_unaligned_le16(known, pos);
		pos += 2;

		/* u8 flags - IEEE80211_RADIOTAP_VHT_FLAG_* */
		if (info->status.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
			*pos |= IEEE80211_RADIOTAP_VHT_FLAG_SGI;
		pos++;

		/* u8 bandwidth */
		if (info->status.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
			*pos = 1;
		else if (info->status.rates[0].flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
			*pos = 4;
		else if (info->status.rates[0].flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
			*pos = 11;
		else /* IEEE80211_TX_RC_{20_MHZ_WIDTH,FIXME:DUP_DATA} */
			*pos = 0;
		pos++;

		/* u8 mcs_nss[4] */
		*pos = (ieee80211_rate_get_vht_mcs(&info->status.rates[0]) << 4) |
			ieee80211_rate_get_vht_nss(&info->status.rates[0]);
		pos += 4;

		/* u8 coding */
		pos++;
		/* u8 group_id */
		pos++;
		/* u16 partial_aid */
		pos += 2;
	}
}

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/*
 * Handles the tx for TDLS teardown frames.
 * If the frame wasn't ACKed by the peer - it will be re-sent through the AP
 */


static void ieee80211_tdls_td_tx_handle(struct ieee80211_local *local,
					struct ieee80211_sub_if_data *sdata,
					struct sk_buff *skb, u32 flags)
{
	struct sk_buff *teardown_skb;
	struct sk_buff *orig_teardown_skb;
	bool is_teardown = false;

	/* Get the teardown data we need and free the lock */
	spin_lock(&sdata->u.mgd.teardown_lock);
	teardown_skb = sdata->u.mgd.teardown_skb;
	orig_teardown_skb = sdata->u.mgd.orig_teardown_skb;
	if ((skb == orig_teardown_skb) && teardown_skb) {
		sdata->u.mgd.teardown_skb = NULL;
		sdata->u.mgd.orig_teardown_skb = NULL;
		is_teardown = true;
	}
	spin_unlock(&sdata->u.mgd.teardown_lock);

	if (is_teardown) {
		/* This mechanism relies on being able to get ACKs */
		WARN_ON(!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS));

		/* Check if peer has ACKed */
		if (flags & IEEE80211_TX_STAT_ACK) {
			dev_kfree_skb_any(teardown_skb);
		} else {
			tdls_dbg(sdata,
				 "TDLS Resending teardown through AP\n");

			ieee80211_subif_start_xmit(teardown_skb, skb->dev);
		}
	}
}

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static struct ieee80211_sub_if_data *

ieee80211_sdata_from_skb(struct ieee80211_local *local, struct sk_buff *skb)
{
	struct ieee80211_sub_if_data *sdata;

	if (skb->dev) {
		list_for_each_entry_rcu(sdata, &local->interfaces, list) {
			if (!sdata->dev)
				continue;

			if (skb->dev == sdata->dev)
				return sdata;
		}

		return NULL;
	}

	return rcu_dereference(local->p2p_sdata);
}

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static void ieee80211_report_ack_skb(struct ieee80211_local *local,
				     struct ieee80211_tx_info *info,
				     bool acked, bool dropped)
{
	struct sk_buff *skb;
	unsigned long flags;

	spin_lock_irqsave(&local->ack_status_lock, flags);
	skb = idr_remove(&local->ack_status_frames, info->ack_frame_id);
	spin_unlock_irqrestore(&local->ack_status_lock, flags);

	if (!skb)
		return;

	if (dropped) {
		dev_kfree_skb_any(skb);
		return;
	}

	if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX) {
		u64 cookie = IEEE80211_SKB_CB(skb)->ack.cookie;
		struct ieee80211_sub_if_data *sdata;
		struct ieee80211_hdr *hdr = (void *)skb->data;

		rcu_read_lock();
		sdata = ieee80211_sdata_from_skb(local, skb);
		if (sdata) {
			if (ieee80211_is_nullfunc(hdr->frame_control) ||
			    ieee80211_is_qos_nullfunc(hdr->frame_control))
				cfg80211_probe_status(sdata->dev, hdr->addr1,
						      cookie, acked,
						      GFP_ATOMIC);
			else
				cfg80211_mgmt_tx_status(&sdata->wdev, cookie,
							skb->data, skb->len,
							acked, GFP_ATOMIC);
		}
		rcu_read_unlock();

		dev_kfree_skb_any(skb);
	} else {
		/* consumes skb */
		skb_complete_wifi_ack(skb, acked);
	}
}

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static void ieee80211_report_used_skb(struct ieee80211_local *local,
				      struct sk_buff *skb, bool dropped)
{
	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
	struct ieee80211_hdr *hdr = (void *)skb->data;
	bool acked = info->flags & IEEE80211_TX_STAT_ACK;

	if (dropped)
		acked = false;

	if (info->flags & IEEE80211_TX_INTFL_MLME_CONN_TX) {
		struct ieee80211_sub_if_data *sdata;

		rcu_read_lock();

		sdata = ieee80211_sdata_from_skb(local, skb);

		if (!sdata) {
			skb->dev = NULL;
		} else {
			unsigned int hdr_size =
				ieee80211_hdrlen(hdr->frame_control);

			/* Check to see if packet is a TDLS teardown packet */
			if (ieee80211_is_data(hdr->frame_control) &&
			    (ieee80211_get_tdls_action(skb, hdr_size) ==
			     WLAN_TDLS_TEARDOWN))
				ieee80211_tdls_td_tx_handle(local, sdata, skb,
							    info->flags);
			else
				ieee80211_mgd_conn_tx_status(sdata,
							     hdr->frame_control,
							     acked);
		}

		rcu_read_unlock();
	} else if (info->ack_frame_id) {
		ieee80211_report_ack_skb(local, info, acked, dropped);
	}

	if (!dropped && skb->destructor) {
		skb->wifi_acked_valid = 1;
		skb->wifi_acked = acked;
	}
}

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66.67%
Liad Kaufman
46
22.44%
1
16.67%
Dan Carpenter
1
0.49%
1
16.67%
Total
205
100.00%
6
100.00%

/*
 * Use a static threshold for now, best value to be determined
 * by testing ...
 * Should it depend on:
 *  - on # of retransmissions
 *  - current throughput (higher value for higher tpt)?
 */

#define STA_LOST_PKT_THRESHOLD	50

#define STA_LOST_TDLS_PKT_THRESHOLD	10

#define STA_LOST_TDLS_PKT_TIME		(10*HZ) 
/* 10secs since last ACK */



static void ieee80211_lost_packet(struct sta_info *sta,
				  struct ieee80211_tx_info *info)
{
	/* If driver relies on its own algorithm for station kickout, skip
         * mac80211 packet loss mechanism.
         */
	if (ieee80211_hw_check(&sta->local->hw, REPORTS_LOW_ACK))
		return;

	/* This packet was aggregated but doesn't carry status info */
	if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
	    !(info->flags & IEEE80211_TX_STAT_AMPDU))
		return;

	sta->status_stats.lost_packets++;
	if (!sta->sta.tdls &&
	    sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
		return;

	/*
         * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
         * of the last packets were lost, and that no ACK was received in the
         * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
         * mechanism.
         */
	if (sta->sta.tdls &&
	    (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
	     time_before(jiffies,
			 sta->status_stats.last_tdls_pkt_time +
			 STA_LOST_TDLS_PKT_TIME)))
		return;

	cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
				    sta->status_stats.lost_packets, GFP_ATOMIC);
	sta->status_stats.lost_packets = 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Felix Fietkau
73
51.41%
2
40.00%
Liad Kaufman
41
28.87%
1
20.00%
Rajkumar Manoharan
16
11.27%
1
20.00%
Johannes Berg
12
8.45%
1
20.00%
Total
142
100.00%
5
100.00%



static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
				  struct ieee80211_tx_info *info,
				  int *retry_count)
{
	int rates_idx = -1;
	int count = -1;
	int i;

	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
		if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
		    !(info->flags & IEEE80211_TX_STAT_AMPDU)) {
			/* just the first aggr frame carry status info */
			info->status.rates[i].idx = -1;
			info->status.rates[i].count = 0;
			break;
		} else if (info->status.rates[i].idx < 0) {
			break;
		} else if (i >= hw->max_report_rates) {
			/* the HW cannot have attempted that rate */
			info->status.rates[i].idx = -1;
			info->status.rates[i].count = 0;
			break;
		}

		count += info->status.rates[i].count;
	}
	rates_idx = i - 1;

	if (count < 0)
		count = 0;

	*retry_count = count;
	return rates_idx;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Johannes Berg
85
43.37%
1
12.50%
Lorenzo Bianconi
51
26.02%
1
12.50%
Helmut Schaa
29
14.80%
3
37.50%
Felix Fietkau
24
12.24%
1
12.50%
Juuso Oikarinen
6
3.06%
1
12.50%
Simon Wunderlich
1
0.51%
1
12.50%
Total
196
100.00%
8
100.00%



void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
			       struct ieee80211_sta *pubsta,
			       struct ieee80211_tx_info *info)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_supported_band *sband;
	int retry_count;
	bool acked, noack_success;

	ieee80211_tx_get_rates(hw, info, &retry_count);

	sband = hw->wiphy->bands[info->band];

	acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
	noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);

	if (pubsta) {
		struct sta_info *sta;

		sta = container_of(pubsta, struct sta_info, sta);

		if (!acked)
			sta->status_stats.retry_failed++;
		sta->status_stats.retry_count += retry_count;

		if (acked) {
			sta->status_stats.last_ack = jiffies;

			if (sta->status_stats.lost_packets)
				sta->status_stats.lost_packets = 0;

			/* Track when last TDLS packet was ACKed */
			if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
				sta->status_stats.last_tdls_pkt_time = jiffies;
		} else {
			ieee80211_lost_packet(sta, info);
		}

		rate_control_tx_status_noskb(local, sband, sta, info);
	}

	if (acked || noack_success) {
		I802_DEBUG_INC(local->dot11TransmittedFrameCount);
		if (!pubsta)
			I802_DEBUG_INC(local->dot11MulticastTransmittedFrameCount);
		if (retry_count > 0)
			I802_DEBUG_INC(local->dot11RetryCount);
		if (retry_count >