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Date: Mon, 1 Oct 2007 15:29:44 +0300 From: "Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi> To: David Miller <davem@...emloft.net> Cc: netdev@...r.kernel.org Subject: [PATCH 4/4] [TCP]: Wrap-safed reordering detection FRTO check In case somebody has a suggestion about a better place for this check, which must guarantee execution "early enough" (i.e, before the wrap can occur), I'm very open to them. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@...sinki.fi> --- net/ipv4/tcp_input.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index cec2611..e22ffe7 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -3024,6 +3024,9 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) /* See if we can take anything off of the retransmit queue. */ flag |= tcp_clean_rtx_queue(sk, &seq_rtt); + /* Guarantee sacktag reordering detection against wrap-arounds */ + if (before(tp->frto_highmark, tp->snd_una)) + tp->frto_highmark = 0; if (tp->frto_counter) frto_cwnd = tcp_process_frto(sk, flag); -- 1.5.0.6 - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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