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tcp: set timestamps for restored skb-s 

When the repair mode is turned off, the write queue seqs are
updated so that the whole queue is considered to be 'already sent.

The "when" field must be set for such skb. It's used in tcp_rearm_rto
for example. If the "when" field isn't set, the retransmit timeout can
be calculated incorrectly and a tcp connected can stop for two minutes
(TCP_RTO_MAX).

Acked-by: Pavel Emelyanov <xemul@parallels.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>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrey Vagin 2013-08-16 19:04:36 +04:00 committed by David S. Miller
parent 49baea8816
commit 7ed5c5ae96
1 changed files with 7 additions and 0 deletions
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7
net/ipv4/tcp.c
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@ -1120,6 +1120,13 @@ int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
if (!skb)
goto wait_for_memory;
/*
* All packets are restored as if they have
* already been sent.
*/
if (tp->repair)
TCP_SKB_CB(skb)->when = tcp_time_stamp;
/*
* Check whether we can use HW checksum.
*/