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Commit 623df484 authored by Neal Cardwell's avatar Neal Cardwell Committed by David S. Miller
Browse files

tcp: extract code to compute SYNACK RTT 



In preparation for adding another spot where we compute the SYNACK
RTT, extract this code so that it can be shared.

Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent de465846

include/net/tcp.h

+9 −0
Original line number Diff line number Diff line
@@ -1137,6 +1137,15 @@ static inline void tcp_openreq_init(struct request_sock *req, 
	ireq->loc_port = tcp_hdr(skb)->dest;

}



/* Compute time elapsed between SYNACK and the ACK completing 3WHS */

static inline void tcp_synack_rtt_meas(struct sock *sk,

				       struct request_sock *req)

{

	if (tcp_rsk(req)->snt_synack)

		tcp_valid_rtt_meas(sk,

		    tcp_time_stamp - tcp_rsk(req)->snt_synack);

}



extern void tcp_enter_memory_pressure(struct sock *sk);



static inline int keepalive_intvl_when(const struct tcp_sock *tp)

net/ipv4/tcp_ipv4.c

+1 −3
Original line number Diff line number Diff line
@@ -1733,9 +1733,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb, 
		newtp->advmss = tcp_sk(sk)->rx_opt.user_mss;



	tcp_initialize_rcv_mss(newsk);

	if (tcp_rsk(req)->snt_synack)

		tcp_valid_rtt_meas(newsk,

		    tcp_time_stamp - tcp_rsk(req)->snt_synack);

	tcp_synack_rtt_meas(newsk, req);

	newtp->total_retrans = req->retrans;



#ifdef CONFIG_TCP_MD5SIG

net/ipv6/tcp_ipv6.c

+1 −3
Original line number Diff line number Diff line
@@ -1348,9 +1348,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, 
		newtp->advmss = tcp_sk(sk)->rx_opt.user_mss;



	tcp_initialize_rcv_mss(newsk);

	if (tcp_rsk(req)->snt_synack)

		tcp_valid_rtt_meas(newsk,

		    tcp_time_stamp - tcp_rsk(req)->snt_synack);

	tcp_synack_rtt_meas(newsk, req);

	newtp->total_retrans = req->retrans;



	newinet->inet_daddr = newinet->inet_saddr = LOOPBACK4_IPV6;