diff options
| author | Eric Dumazet <edumazet@google.com> | 2023-10-20 12:57:42 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-10-23 09:35:01 +0100 |
| commit | 003e07a1e48e9423647d2fef1c86b4caab3a94be (patch) | |
| tree | 2f9ab2156cf5cb6b24543d4076ff954d619596e5 /net/ipv4 | |
| parent | d1a02ed66fe62aa2edd77bd54e270ebc33bd12ff (diff) | |
tcp: move tcp_ns_to_ts() to net/ipv4/syncookies.c
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>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/syncookies.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index 3b4dafefb4b0..62395fdb0ca5 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -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; |