Commit c7781a6e authored Aug 27, 2013 by Andrew Vagin Committed by David S. Miller Aug 29, 2013

tcp: initialize rcv_tstamp for restored sockets



u32 rcv_tstamp;     /* timestamp of last received ACK */

Its value used in tcp_retransmit_timer, which closes socket
if the last ack was received more then TCP_RTO_MAX ago.

Currently rcv_tstamp is initialized to zero and if tcp_retransmit_timer
is called before receiving a first ack, the connection is closed.

This patch initializes rcv_tstamp to a timestamp, when a socket was
restored.

Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Reported-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 282a1dff

net/ipv4/tcp_output.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -2814,6 +2814,8 @@ void tcp_connect_init(struct sock *sk)

		if (likely(!tp->repair))
		tp->rcv_nxt = 0;
		else
		tp->rcv_tstamp = tcp_time_stamp;
		tp->rcv_wup = tp->rcv_nxt;
		tp->copied_seq = tp->rcv_nxt;

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