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Commit 77c63127 authored by Yuchung Cheng's avatar Yuchung Cheng Committed by David S. Miller
Browse files

tcp: add tcp_tsopt_ecr_before helper 



a helper to prepare the main RACK patch

Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent af82f4e8

net/ipv4/tcp_input.c

+7 −2
Original line number Diff line number Diff line
@@ -2250,14 +2250,19 @@ static inline void tcp_moderate_cwnd(struct tcp_sock *tp) 
	tp->snd_cwnd_stamp = tcp_time_stamp;

}



static bool tcp_tsopt_ecr_before(const struct tcp_sock *tp, u32 when)

{

	return tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr &&

	       before(tp->rx_opt.rcv_tsecr, when);

}



/* Nothing was retransmitted or returned timestamp is less

 * than timestamp of the first retransmission.

 */

static inline bool tcp_packet_delayed(const struct tcp_sock *tp)

{

	return !tp->retrans_stamp ||

		(tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr &&

		 before(tp->rx_opt.rcv_tsecr, tp->retrans_stamp));

	       tcp_tsopt_ecr_before(tp, tp->retrans_stamp);

}



/* Undo procedures. */