mirror of https://github.com/hak5/openwrt.git
mac80211: add support for reporting tx status without attached skb
Signed-off-by: Felix Fietkau <nbd@openwrt.org> SVN-Revision: 43297lede-17.01
Felix Fietkau
parent
7b0b8556d8
commit
9cd492b3e1
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@ -0,0 +1,33 @@
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 15 Nov 2014 22:13:38 +0100
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Subject: [PATCH] mac80211: minstrel_ht: add a small optimization to
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minstrel_aggr_check
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Check the queue mapping earlier, skb->queue_mapping is more likely than
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skb->data to still be in d-cache.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/net/mac80211/rc80211_minstrel_ht.c
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+++ b/net/mac80211/rc80211_minstrel_ht.c
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@@ -690,6 +690,9 @@ minstrel_aggr_check(struct ieee80211_sta
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struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
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u16 tid;
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+ if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
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+ return;
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+
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if (unlikely(!ieee80211_is_data_qos(hdr->frame_control)))
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return;
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@@ -700,9 +703,6 @@ minstrel_aggr_check(struct ieee80211_sta
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if (likely(sta->ampdu_mlme.tid_tx[tid]))
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return;
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- if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)
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- return;
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-
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ieee80211_start_tx_ba_session(pubsta, tid, 5000);
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}
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@ -0,0 +1,33 @@
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 15 Nov 2014 22:16:36 +0100
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Subject: [PATCH] mac80211: minstrel_ht: move aggregation check to
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.get_rate()
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Preparation for adding a no-skb tx status path
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/net/mac80211/rc80211_minstrel_ht.c
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+++ b/net/mac80211/rc80211_minstrel_ht.c
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@@ -782,9 +782,6 @@ minstrel_ht_tx_status(void *priv, struct
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if (time_after(jiffies, mi->stats_update + (mp->update_interval / 2 * HZ) / 1000)) {
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update = true;
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minstrel_ht_update_stats(mp, mi);
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- if (!(info->flags & IEEE80211_TX_CTL_AMPDU) &&
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- mi->max_prob_rate / MCS_GROUP_RATES != MINSTREL_CCK_GROUP)
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- minstrel_aggr_check(sta, skb);
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}
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if (update)
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@@ -1026,6 +1023,10 @@ minstrel_ht_get_rate(void *priv, struct
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if (!msp->is_ht)
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return mac80211_minstrel.get_rate(priv, sta, &msp->legacy, txrc);
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+ if (!(info->flags & IEEE80211_TX_CTL_AMPDU) &&
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+ mi->max_prob_rate / MCS_GROUP_RATES != MINSTREL_CCK_GROUP)
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+ minstrel_aggr_check(sta, txrc->skb);
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+
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info->flags |= mi->tx_flags;
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minstrel_ht_check_cck_shortpreamble(mp, mi, txrc->short_preamble);
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@ -0,0 +1,43 @@
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 15 Nov 2014 22:23:44 +0100
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Subject: [PATCH] mac80211: add tx_status_noskb to rate_control_ops
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This op works like .tx_status, except it does not need access to the
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skb. This will be used by drivers that cannot match tx status
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information to specific packets.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/include/net/mac80211.h
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+++ b/include/net/mac80211.h
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@@ -4727,6 +4727,10 @@ struct rate_control_ops {
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void (*free_sta)(void *priv, struct ieee80211_sta *sta,
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void *priv_sta);
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+ void (*tx_status_noskb)(void *priv,
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+ struct ieee80211_supported_band *sband,
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+ struct ieee80211_sta *sta, void *priv_sta,
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+ struct ieee80211_tx_info *info);
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void (*tx_status)(void *priv, struct ieee80211_supported_band *sband,
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struct ieee80211_sta *sta, void *priv_sta,
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struct sk_buff *skb);
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--- a/net/mac80211/rate.h
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+++ b/net/mac80211/rate.h
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@@ -37,11 +37,15 @@ static inline void rate_control_tx_statu
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struct rate_control_ref *ref = local->rate_ctrl;
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struct ieee80211_sta *ista = &sta->sta;
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void *priv_sta = sta->rate_ctrl_priv;
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+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
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return;
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- ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
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+ if (ref->ops->tx_status)
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+ ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
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+ else
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+ ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
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}
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@ -0,0 +1,31 @@
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 15 Nov 2014 22:38:07 +0100
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Subject: [PATCH] mac80211: minstrel: switch to .tx_status_noskb
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/net/mac80211/rc80211_minstrel.c
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+++ b/net/mac80211/rc80211_minstrel.c
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@@ -223,11 +223,10 @@ minstrel_update_stats(struct minstrel_pr
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static void
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minstrel_tx_status(void *priv, struct ieee80211_supported_band *sband,
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struct ieee80211_sta *sta, void *priv_sta,
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- struct sk_buff *skb)
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+ struct ieee80211_tx_info *info)
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{
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struct minstrel_priv *mp = priv;
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struct minstrel_sta_info *mi = priv_sta;
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- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_tx_rate *ar = info->status.rates;
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int i, ndx;
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int success;
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@@ -674,7 +673,7 @@ static u32 minstrel_get_expected_through
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const struct rate_control_ops mac80211_minstrel = {
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.name = "minstrel",
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- .tx_status = minstrel_tx_status,
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+ .tx_status_noskb = minstrel_tx_status,
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.get_rate = minstrel_get_rate,
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.rate_init = minstrel_rate_init,
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.alloc = minstrel_alloc,
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@ -0,0 +1,41 @@
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 15 Nov 2014 22:38:21 +0100
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Subject: [PATCH] mac80211: minstrel_ht: switch to .tx_status_noskb
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/net/mac80211/rc80211_minstrel_ht.c
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+++ b/net/mac80211/rc80211_minstrel_ht.c
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@@ -709,11 +709,10 @@ minstrel_aggr_check(struct ieee80211_sta
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static void
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minstrel_ht_tx_status(void *priv, struct ieee80211_supported_band *sband,
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struct ieee80211_sta *sta, void *priv_sta,
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- struct sk_buff *skb)
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+ struct ieee80211_tx_info *info)
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{
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struct minstrel_ht_sta_priv *msp = priv_sta;
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struct minstrel_ht_sta *mi = &msp->ht;
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- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_tx_rate *ar = info->status.rates;
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struct minstrel_rate_stats *rate, *rate2;
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struct minstrel_priv *mp = priv;
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@@ -721,7 +720,8 @@ minstrel_ht_tx_status(void *priv, struct
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int i;
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if (!msp->is_ht)
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- return mac80211_minstrel.tx_status(priv, sband, sta, &msp->legacy, skb);
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+ return mac80211_minstrel.tx_status_noskb(priv, sband, sta,
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+ &msp->legacy, info);
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/* This packet was aggregated but doesn't carry status info */
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if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
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@@ -1343,7 +1343,7 @@ static u32 minstrel_ht_get_expected_thro
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static const struct rate_control_ops mac80211_minstrel_ht = {
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.name = "minstrel_ht",
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- .tx_status = minstrel_ht_tx_status,
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+ .tx_status_noskb = minstrel_ht_tx_status,
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.get_rate = minstrel_ht_get_rate,
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.rate_init = minstrel_ht_rate_init,
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.rate_update = minstrel_ht_rate_update,
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@ -0,0 +1,219 @@
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From: Felix Fietkau <nbd@openwrt.org>
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Date: Sat, 15 Nov 2014 23:50:27 +0100
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Subject: [PATCH] mac80211: add ieee80211_tx_status_noskb
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This can be used by drivers that cannot reliably map tx status
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information onto specific skbs.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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---
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--- a/include/net/mac80211.h
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+++ b/include/net/mac80211.h
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@@ -3517,6 +3517,28 @@ void ieee80211_tx_status(struct ieee8021
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struct sk_buff *skb);
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/**
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+ * ieee80211_tx_status_noskb - transmit status callback without skb
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+ *
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+ * This function can be used as a replacement for ieee80211_tx_status
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+ * in drivers that cannot reliably map tx status information back to
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+ * specific skbs.
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+ *
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+ * This function may not be called in IRQ context. Calls to this function
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+ * for a single hardware must be synchronized against each other. Calls
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+ * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe()
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+ * may not be mixed for a single hardware. Must not run concurrently with
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+ * ieee80211_rx() or ieee80211_rx_ni().
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+ *
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+ * @hw: the hardware the frame was transmitted by
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+ * @sta: the receiver station to which this packet is sent
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+ * (NULL for multicast packets)
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+ * @info: tx status information
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+ */
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+void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
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+ struct ieee80211_sta *sta,
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+ struct ieee80211_tx_info *info);
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+
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+/**
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* ieee80211_tx_status_ni - transmit status callback (in process context)
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*
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* Like ieee80211_tx_status() but can be called in process context.
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--- a/net/mac80211/rate.h
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+++ b/net/mac80211/rate.h
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@@ -49,6 +49,23 @@ static inline void rate_control_tx_statu
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}
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+static inline void
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+rate_control_tx_status_noskb(struct ieee80211_local *local,
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+ struct ieee80211_supported_band *sband,
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+ struct sta_info *sta,
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+ struct ieee80211_tx_info *info)
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+{
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+ struct rate_control_ref *ref = local->rate_ctrl;
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+ struct ieee80211_sta *ista = &sta->sta;
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+ void *priv_sta = sta->rate_ctrl_priv;
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+
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+ if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
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+ return;
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+
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+ ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
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+}
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+
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+
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static inline void rate_control_rate_init(struct sta_info *sta)
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{
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struct ieee80211_local *local = sta->sdata->local;
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--- a/net/mac80211/status.c
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+++ b/net/mac80211/status.c
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@@ -541,10 +541,9 @@ static void ieee80211_tx_latency_end_msr
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#define STA_LOST_TDLS_PKT_THRESHOLD 10
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#define STA_LOST_TDLS_PKT_TIME (10*HZ) /* 10secs since last ACK */
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-static void ieee80211_lost_packet(struct sta_info *sta, struct sk_buff *skb)
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+static void ieee80211_lost_packet(struct sta_info *sta,
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+ struct ieee80211_tx_info *info)
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{
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- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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-
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/* This packet was aggregated but doesn't carry status info */
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if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
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!(info->flags & IEEE80211_TX_STAT_AMPDU))
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@@ -571,24 +570,13 @@ static void ieee80211_lost_packet(struct
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sta->lost_packets = 0;
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}
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-void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
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+static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
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+ struct ieee80211_tx_info *info,
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+ int *retry_count)
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{
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- struct sk_buff *skb2;
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- struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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- struct ieee80211_local *local = hw_to_local(hw);
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- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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- __le16 fc;
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- struct ieee80211_supported_band *sband;
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- struct ieee80211_sub_if_data *sdata;
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- struct net_device *prev_dev = NULL;
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- struct sta_info *sta, *tmp;
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- int retry_count = -1, i;
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int rates_idx = -1;
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- bool send_to_cooked;
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- bool acked;
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- struct ieee80211_bar *bar;
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- int rtap_len;
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- int shift = 0;
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+ int count = -1;
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+ int i;
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for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
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if ((info->flags & IEEE80211_TX_CTL_AMPDU) &&
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@@ -606,12 +594,94 @@ void ieee80211_tx_status(struct ieee8021
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break;
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}
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- retry_count += info->status.rates[i].count;
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+ count += info->status.rates[i].count;
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}
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rates_idx = i - 1;
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- if (retry_count < 0)
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- retry_count = 0;
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+ if (count < 0)
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+ count = 0;
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+
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+ *retry_count = count;
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+ return rates_idx;
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+}
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+
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+void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
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+ struct ieee80211_sta *pubsta,
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+ struct ieee80211_tx_info *info)
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+{
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+ struct ieee80211_local *local = hw_to_local(hw);
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+ struct ieee80211_supported_band *sband;
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+ int retry_count;
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+ int rates_idx;
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+ bool acked;
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+
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+ rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
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+
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+ sband = hw->wiphy->bands[info->band];
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+
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+ acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
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+ if (pubsta) {
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+ struct sta_info *sta;
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+
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+ sta = container_of(pubsta, struct sta_info, sta);
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+
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+ if (info->flags & IEEE80211_TX_STATUS_EOSP)
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+ clear_sta_flag(sta, WLAN_STA_SP);
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+
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+ if (!acked)
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+ sta->tx_retry_failed++;
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+ sta->tx_retry_count += retry_count;
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+
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+ if (acked) {
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+ sta->last_rx = jiffies;
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+
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+ if (sta->lost_packets)
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+ sta->lost_packets = 0;
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+
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+ /* Track when last TDLS packet was ACKed */
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+ if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
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+ sta->last_tdls_pkt_time = jiffies;
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+ } else {
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+ ieee80211_lost_packet(sta, info);
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+ }
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+
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+ rate_control_tx_status_noskb(local, sband, sta, info);
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+ }
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+
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+ if (acked) {
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+ local->dot11TransmittedFrameCount++;
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+ if (!pubsta)
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+ local->dot11MulticastTransmittedFrameCount++;
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+ if (retry_count > 0)
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+ local->dot11RetryCount++;
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+ if (retry_count > 1)
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+ local->dot11MultipleRetryCount++;
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+ } else {
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+ local->dot11FailedCount++;
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+ }
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+}
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+EXPORT_SYMBOL(ieee80211_tx_status_noskb);
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+
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+void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
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+{
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+ struct sk_buff *skb2;
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+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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+ struct ieee80211_local *local = hw_to_local(hw);
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+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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+ __le16 fc;
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+ struct ieee80211_supported_band *sband;
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+ struct ieee80211_sub_if_data *sdata;
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+ struct net_device *prev_dev = NULL;
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+ struct sta_info *sta, *tmp;
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+ int retry_count;
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+ int rates_idx;
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+ bool send_to_cooked;
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+ bool acked;
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+ struct ieee80211_bar *bar;
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+ int rtap_len;
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+ int shift = 0;
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+
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+ rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
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rcu_read_lock();
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@@ -716,7 +786,7 @@ void ieee80211_tx_status(struct ieee8021
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if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
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sta->last_tdls_pkt_time = jiffies;
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} else {
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- ieee80211_lost_packet(sta, skb);
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+ ieee80211_lost_packet(sta, info);
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}
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}
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