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tcp: add tcp_time_stamp_ms() helper

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In preparation of adding usec TCP TS values, add tcp_time_stamp_ms()
for contexts needing ms based values.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2023-10-20 12:57:38 +00:00 committed by David S. Miller
parent 73ed8e0338
commit 99d679556d
3 changed files with 7 additions and 2 deletions
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5
include/net/tcp.h
View File

@ -804,6 +804,11 @@ static inline u32 tcp_time_stamp(const struct tcp_sock *tp)
return div_u64(tp->tcp_mstamp, USEC_PER_SEC / TCP_TS_HZ);
}
static inline u32 tcp_time_stamp_ms(const struct tcp_sock *tp)
{
return div_u64(tp->tcp_mstamp, USEC_PER_MSEC);
}
/* Convert a nsec timestamp into TCP TSval timestamp (ms based currently) */
static inline u64 tcp_ns_to_ts(u64 ns)
{

2
net/ipv4/tcp_input.c
View File

@ -2856,7 +2856,7 @@ void tcp_enter_recovery(struct sock *sk, bool ece_ack)
static void tcp_update_rto_time(struct tcp_sock *tp)
{
if (tp->rto_stamp) {
tp->total_rto_time += tcp_time_stamp(tp) - tp->rto_stamp;
tp->total_rto_time += tcp_time_stamp_ms(tp) - tp->rto_stamp;
tp->rto_stamp = 0;
}
}

2
net/ipv4/tcp_timer.c
View File

@ -422,7 +422,7 @@ static void tcp_update_rto_stats(struct sock *sk)
if (!icsk->icsk_retransmits) {
tp->total_rto_recoveries++;
tp->rto_stamp = tcp_time_stamp(tp);
tp->rto_stamp = tcp_time_stamp_ms(tp);
}
icsk->icsk_retransmits++;
tp->total_rto++;