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Code Issues Releases Wiki Activity

tcp: move tcp_ns_to_ts() to net/ipv4/syncookies.c

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tcp_ns_to_ts() is only used once from cookie_init_timestamp().

Also add the 'bool usec_ts' parameter to enable usec TS later.

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 12:57:42 +00:00 committed by David S. Miller
parent d1a02ed66f
commit 003e07a1e4
2 changed files with 9 additions and 7 deletions
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6
include/net/tcp.h
View file

@ -824,12 +824,6 @@ 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)
{
return div_u64(ns, NSEC_PER_SEC / TCP_TS_HZ);
}
void tcp_mstamp_refresh(struct tcp_sock *tp);
static inline u32 tcp_stamp_us_delta(u64 t1, u64 t0)

10
net/ipv4/syncookies.c
View file

@ -51,6 +51,14 @@ static u32 cookie_hash(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport,
count, &syncookie_secret[c]);
}
/* Convert one nsec 64bit timestamp to ts (ms or usec resolution) */
static u64 tcp_ns_to_ts(bool usec_ts, u64 val)
{
if (usec_ts)
return div_u64(val, NSEC_PER_USEC);
return div_u64(val, NSEC_PER_MSEC);
}
/*
* when syncookies are in effect and tcp timestamps are enabled we encode
@ -62,7 +70,7 @@ static u32 cookie_hash(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport,
u64 cookie_init_timestamp(struct request_sock *req, u64 now)
{
const struct inet_request_sock *ireq = inet_rsk(req);
u64 ts, ts_now = tcp_ns_to_ts(now);
u64 ts, ts_now = tcp_ns_to_ts(false, now);
u32 options = 0;
options = ireq->wscale_ok ? ireq->snd_wscale : TS_OPT_WSCALE_MASK;