TCP send queue contains two types of data:
* unacknowledged data, which have been sent out
* data, which have not been sent
Currently only the size of all data is save, but it's not enough for
proper restoring of TCP connections.
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
If a TCP socket will get live-migrated from one box to another the
timestamps (which are typically ON) will get screwed up -- the new
kernel will generate TS values that has nothing to do with what they
were on dump. The solution is to yet again fix the kernel and put a
"timestamp offset" on a socket.
v2: don't fail if TCP_TIMESTAMP is unsupported
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
rcv_wscale is a symetric parameter with snd_wscale.
Both this parameters are set on a connection handshake.
Without this value a remote window size can't be interpreted correctly,
because a value from a packet should be shifted on rcv_wscale.
This patch doesn't break a back compatibility, a rcv window
will be restored with the same bug (rcv_wscale = 0).
v2: Update to a new kernel interface:
[PATCH] tcp: restore rcv_wscale in a repair mode (v2)
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
