netdev - [PATCH 2/3] TCP_DEFER_ACCEPT updates

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Message-Id: <1204405268.5792.31.camel@tng>
Date:	Sat, 01 Mar 2008 16:01:08 -0500
From:	Patrick McManus <mcmanus@...ksong.com>
To:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH 2/3] TCP_DEFER_ACCEPT updates - dont retxmt synack

    a socket in LISTEN that had completed its 3 way handshake, but not notified
    userspace because of SO_DEFER_ACCEPT, would retransmit the already
    acked syn-ack during the time it was waiting for the first data byte
    from the peer.


Signed-off-by: Patrick McManus <mcmanus@...ksong.com>
Acked-by: Eric Dumazet <dada1@...mosbay.com>

----

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 03cc323..7216f5e 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -461,8 +461,9 @@ void inet_csk_reqsk_queue_prune(struct sock *parent,
                reqp=&lopt->syn_table[i];
                while ((req = *reqp) != NULL) {
                        if (time_after_eq(now, req->expires)) {
-                               if ((req->retrans < (inet_rsk(req)->acked ? max_retries : thresh))
-                                   && !req->rsk_ops->rtx_syn_ack(parent, req, NULL)) {
+                               if ((req->retrans < (inet_rsk(req)->acked ? max_retries : thresh))
+                                   &&  (inet_rsk(req)->acked ||
+                                        !req->rsk_ops->rtx_syn_ack(parent, req, NULL))) {
                                        unsigned long timeo;

                                        if (req->retrans++ == 0)


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