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tcp: don't check mtu probe completion in the loop

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It seems that no variables clash such that we couldn't do
the check just once later on. Therefore move it.

Also kill dead obvious comment, dead argument and add
unlikely since this mtu probe does not happen too often.

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 2009-03-14 14:23:04 +00:00 committed by David S. Miller
parent c887e6d2d9
commit 72211e9050
1 changed files with 6 additions and 7 deletions
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13
net/ipv4/tcp_input.c
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@ -2836,7 +2836,7 @@ static void tcp_mtup_probe_failed(struct sock *sk)
icsk->icsk_mtup.probe_size = 0;
}
static void tcp_mtup_probe_success(struct sock *sk, struct sk_buff *skb)
static void tcp_mtup_probe_success(struct sock *sk)
{
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
@ -3219,12 +3219,6 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets,
acked_pcount = tcp_skb_pcount(skb);
}
/* MTU probing checks */
if (fully_acked && icsk->icsk_mtup.probe_size &&
!after(tp->mtu_probe.probe_seq_end, scb->end_seq)) {
tcp_mtup_probe_success(sk, skb);
}
if (sacked & TCPCB_RETRANS) {
if (sacked & TCPCB_SACKED_RETRANS)
tp->retrans_out -= acked_pcount;
@ -3287,6 +3281,11 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets,
const struct tcp_congestion_ops *ca_ops
= inet_csk(sk)->icsk_ca_ops;
if (unlikely(icsk->icsk_mtup.probe_size &&
!after(tp->mtu_probe.probe_seq_end, tp->snd_una))) {
tcp_mtup_probe_success(sk);
}
tcp_ack_update_rtt(sk, flag, seq_rtt);
tcp_rearm_rto(sk);