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tcp: extract code to compute SYNACK RTT

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

Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Neal Cardwell
2012-09-22 04:18:54 +00:00
committed by David S. Miller
parent de46584675
commit 623df484a7
3 changed files with 11 additions and 6 deletions
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9
include/net/tcp.h
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@@ -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)