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27 March 2024, 02:37:15 UTC
Revision e3e12028315749b7fa2edbc37328e5847be9ede9 authored by Andrew Vagin on 27 August 2013, 08:21:55 UTC, committed by David S. Miller on 29 August 2013, 19:11:12 UTC 
tcp: don't apply tsoffset if rcv_tsecr is zero
 
The zero value means that tsecr is not valid, so it's a special case.

tsoffset is used to customize tcp_time_stamp for one socket.
tsoffset is usually zero, it's used when a socket was moved from one
host to another host.

Currently this issue affects logic of tcp_rcv_rtt_measure_ts. Due to
incorrect value of rcv_tsecr, tcp_rcv_rtt_measure_ts sets rto to
TCP_RTO_MAX.

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>
1 parent c7781a6
History
Tip revision: e3e12028315749b7fa2edbc37328e5847be9ede9 authored by Andrew Vagin on 27 August 2013, 08:21:55 UTC
tcp: don't apply tsoffset if rcv_tsecr is zero
Tip revision: e3e1202
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