aboutsummaryrefslogtreecommitdiffstats
path: root/include/net/tcp.h
diff options
context:
space:
mode:
authorEric Dumazet <edumazet@google.com>2019-11-07 11:51:18 -0800
committerDavid S. Miller <davem@davemloft.net>2019-11-07 16:17:52 -0800
commit200ecef67b8d09d16ec55f91c92751dcc7a38d40 (patch)
tree7bb22e541a0be9b507e4fe53f2d3de219ce41def /include/net/tcp.h
parentselftests: Add source route tests to fib_tests (diff)
downloadlinux-dev-200ecef67b8d09d16ec55f91c92751dcc7a38d40.tar.xz
linux-dev-200ecef67b8d09d16ec55f91c92751dcc7a38d40.zip
tcp: Remove one extra ktime_get_ns() from cookie_init_timestamp
tcp_make_synack() already uses tcp_clock_ns(), and can pass the value to cookie_init_timestamp() to avoid another call to ktime_get_ns() helper. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/tcp.h')
-rw-r--r--include/net/tcp.h12
1 files changed, 9 insertions, 3 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h
index ab4eb5eb5d07..36f195fb576a 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -537,7 +537,7 @@ static inline u32 tcp_cookie_time(void)
u32 __cookie_v4_init_sequence(const struct iphdr *iph, const struct tcphdr *th,
u16 *mssp);
__u32 cookie_v4_init_sequence(const struct sk_buff *skb, __u16 *mss);
-u64 cookie_init_timestamp(struct request_sock *req);
+u64 cookie_init_timestamp(struct request_sock *req, u64 now);
bool cookie_timestamp_decode(const struct net *net,
struct tcp_options_received *opt);
bool cookie_ecn_ok(const struct tcp_options_received *opt,
@@ -757,10 +757,16 @@ static inline u32 tcp_time_stamp(const struct tcp_sock *tp)
return div_u64(tp->tcp_mstamp, USEC_PER_SEC / TCP_TS_HZ);
}
+/* Convert a nsec timestamp into TCP TSval timestamp (ms based currently) */
+static inline u32 tcp_ns_to_ts(u64 ns)
+{
+ return div_u64(ns, NSEC_PER_SEC / TCP_TS_HZ);
+}
+
/* Could use tcp_clock_us() / 1000, but this version uses a single divide */
static inline u32 tcp_time_stamp_raw(void)
{
- return div_u64(tcp_clock_ns(), NSEC_PER_SEC / TCP_TS_HZ);
+ return tcp_ns_to_ts(tcp_clock_ns());
}
void tcp_mstamp_refresh(struct tcp_sock *tp);
@@ -772,7 +778,7 @@ static inline u32 tcp_stamp_us_delta(u64 t1, u64 t0)
static inline u32 tcp_skb_timestamp(const struct sk_buff *skb)
{
- return div_u64(skb->skb_mstamp_ns, NSEC_PER_SEC / TCP_TS_HZ);
+ return tcp_ns_to_ts(skb->skb_mstamp_ns);
}
/* provide the departure time in us unit */