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authorAndrey Vagin <avagin@openvz.org>2013-02-11 05:50:17 +0000
committerDavid S. Miller <davem@davemloft.net>2013-02-13 13:22:15 -0500
commitceaa1fef65a7c2e017b260b879b310dd24888083 (patch)
treef511458ce6431cd4b5f5b46f4c633f73e49a3589 /net/ipv4/tcp.c
parentd0023f820e003857248d14f2213ac3930283f16c (diff)
downloadlinux-stericsson-ceaa1fef65a7c2e017b260b879b310dd24888083.tar.gz
tcp: adding a per-socket timestamp offset
This functionality is used for restoring tcp sockets. A tcp timestamp depends on how long a system has been running, so it's differ for each host. The solution is to set a per-socket offset. A per-socket offset for a TIME_WAIT socket is inherited from a proper tcp socket. tcp_request_sock doesn't have a timestamp offset, because the repair mode for them are not implemented. 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> Cc: Eric Dumazet <edumazet@google.com> Cc: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 2c7e5963c2ea..8a90bda96038 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -400,6 +400,8 @@ void tcp_init_sock(struct sock *sk)
tcp_enable_early_retrans(tp);
icsk->icsk_ca_ops = &tcp_init_congestion_ops;
+ tp->tsoffset = 0;
+
sk->sk_state = TCP_CLOSE;
sk->sk_write_space = sk_stream_write_space;