mirror of https://gitee.com/openkylin/linux.git
[TCP]: Move accounting from tso_acked to clean_rtx_queue
The accounting code is pretty much the same, so it's a shame we do it in two places. I'm not too sure if added fully_acked check in MTU probing is really what we want perhaps the added end_seq could be used in the after() comparison. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ilpo Järvinen
David S. Miller
parent
5af4ec236f
commit
13fcf850cc
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@ -2525,14 +2525,12 @@ static void tcp_rearm_rto(struct sock *sk)
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}
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}
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static int tcp_tso_acked(struct sock *sk, struct sk_buff *skb,
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__u32 now, __s32 *seq_rtt)
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static u32 tcp_tso_acked(struct sock *sk, struct sk_buff *skb)
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{
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struct tcp_sock *tp = tcp_sk(sk);
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struct tcp_skb_cb *scb = TCP_SKB_CB(skb);
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__u32 seq = tp->snd_una;
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__u32 packets_acked;
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int acked = 0;
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/* If we get here, the whole TSO packet has not been
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* acked.
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@ -2545,39 +2543,11 @@ static int tcp_tso_acked(struct sock *sk, struct sk_buff *skb,
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packets_acked -= tcp_skb_pcount(skb);
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if (packets_acked) {
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__u8 sacked = scb->sacked;
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acked |= FLAG_DATA_ACKED;
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if (sacked) {
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if (sacked & TCPCB_RETRANS) {
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if (sacked & TCPCB_SACKED_RETRANS)
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tp->retrans_out -= packets_acked;
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acked |= FLAG_RETRANS_DATA_ACKED;
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*seq_rtt = -1;
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} else if (*seq_rtt < 0)
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*seq_rtt = now - scb->when;
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if (sacked & TCPCB_SACKED_ACKED)
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tp->sacked_out -= packets_acked;
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if (sacked & TCPCB_LOST)
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tp->lost_out -= packets_acked;
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if (sacked & TCPCB_URG) {
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if (tp->urg_mode &&
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!before(seq, tp->snd_up))
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tp->urg_mode = 0;
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}
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} else if (*seq_rtt < 0)
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*seq_rtt = now - scb->when;
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/* hint's skb might be NULL but we don't need to care */
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tp->fastpath_cnt_hint -= min_t(u32, packets_acked,
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tp->fastpath_cnt_hint);
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tp->packets_out -= packets_acked;
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BUG_ON(tcp_skb_pcount(skb) == 0);
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BUG_ON(!before(scb->seq, scb->end_seq));
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}
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return acked;
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return packets_acked;
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}
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/* Remove acknowledged frames from the retransmission queue. */
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@ -2587,6 +2557,7 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p)
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const struct inet_connection_sock *icsk = inet_csk(sk);
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struct sk_buff *skb;
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__u32 now = tcp_time_stamp;
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int fully_acked = 1;
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int acked = 0;
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int prior_packets = tp->packets_out;
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__s32 seq_rtt = -1;
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@ -2595,6 +2566,8 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p)
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while ((skb = tcp_write_queue_head(sk)) &&
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skb != tcp_send_head(sk)) {
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struct tcp_skb_cb *scb = TCP_SKB_CB(skb);
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u32 end_seq;
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u32 packets_acked;
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__u8 sacked = scb->sacked;
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/* If our packet is before the ack sequence we can
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@ -2602,11 +2575,19 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p)
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* the other end.
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*/
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if (after(scb->end_seq, tp->snd_una)) {
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if (tcp_skb_pcount(skb) > 1 &&
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after(tp->snd_una, scb->seq))
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acked |= tcp_tso_acked(sk, skb,
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now, &seq_rtt);
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break;
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if (tcp_skb_pcount(skb) == 1 ||
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!after(tp->snd_una, scb->seq))
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break;
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packets_acked = tcp_tso_acked(sk, skb);
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if (!packets_acked)
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break;
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fully_acked = 0;
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end_seq = tp->snd_una;
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} else {
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packets_acked = tcp_skb_pcount(skb);
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end_seq = scb->end_seq;
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}
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/* Initial outgoing SYN's get put onto the write_queue
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@ -2624,7 +2605,7 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p)
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}
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/* MTU probing checks */
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if (icsk->icsk_mtup.probe_size) {
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if (fully_acked && icsk->icsk_mtup.probe_size) {
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if (!after(tp->mtu_probe.probe_seq_end, TCP_SKB_CB(skb)->end_seq)) {
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tcp_mtup_probe_success(sk, skb);
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}
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@ -2633,27 +2614,32 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p)
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if (sacked) {
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if (sacked & TCPCB_RETRANS) {
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if (sacked & TCPCB_SACKED_RETRANS)
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tp->retrans_out -= tcp_skb_pcount(skb);
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tp->retrans_out -= packets_acked;
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acked |= FLAG_RETRANS_DATA_ACKED;
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seq_rtt = -1;
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} else if (seq_rtt < 0) {
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seq_rtt = now - scb->when;
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last_ackt = skb->tstamp;
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if (fully_acked)
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last_ackt = skb->tstamp;
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}
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if (sacked & TCPCB_SACKED_ACKED)
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tp->sacked_out -= tcp_skb_pcount(skb);
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tp->sacked_out -= packets_acked;
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if (sacked & TCPCB_LOST)
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tp->lost_out -= tcp_skb_pcount(skb);
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tp->lost_out -= packets_acked;
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if (sacked & TCPCB_URG) {
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if (tp->urg_mode &&
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!before(scb->end_seq, tp->snd_up))
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if (tp->urg_mode && !before(end_seq, tp->snd_up))
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tp->urg_mode = 0;
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}
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} else if (seq_rtt < 0) {
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seq_rtt = now - scb->when;
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last_ackt = skb->tstamp;
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if (fully_acked)
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last_ackt = skb->tstamp;
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}
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tp->packets_out -= tcp_skb_pcount(skb);
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tp->packets_out -= packets_acked;
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if (!fully_acked)
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break;
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tcp_unlink_write_queue(skb, sk);
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sk_stream_free_skb(sk, skb);
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tcp_clear_all_retrans_hints(tp);
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@ -2668,6 +2654,9 @@ static int tcp_clean_rtx_queue(struct sock *sk, __s32 *seq_rtt_p)
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tcp_rearm_rto(sk);
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tp->fackets_out -= min(pkts_acked, tp->fackets_out);
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/* hint's skb might be NULL but we don't need to care */
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tp->fastpath_cnt_hint -= min_t(u32, pkts_acked,
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tp->fastpath_cnt_hint);
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if (tcp_is_reno(tp))
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tcp_remove_reno_sacks(sk, pkts_acked);
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