path: root/net/ipv4/tcp_timer.c
diff options
authorEric Dumazet <edumazet@google.com>2017-05-16 14:00:00 -0700
committerDavid S. Miller <davem@davemloft.net>2017-05-17 16:06:01 -0400
commit385e20706facd376f27863bd55b7cc7720d3f27b (patch)
treeb3e6e53158d3348cd6d6b7b473adfe2f1c5a8d6c /net/ipv4/tcp_timer.c
parentsch_dsmark: Fix uninitialized variable warning. (diff)
tcp: use tp->tcp_mstamp in output path
Idea is to later convert tp->tcp_mstamp to a full u64 counter using usec resolution, so that we can later have fine grained TCP TS clock (RFC 7323), regardless of HZ value. We try to refresh tp->tcp_mstamp only when necessary. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 86934bcf685a..ec7c5473c788 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -339,7 +339,7 @@ static void tcp_probe_timer(struct sock *sk)
start_ts = tcp_skb_timestamp(tcp_send_head(sk));
if (!start_ts)
- skb_mstamp_get(&tcp_send_head(sk)->skb_mstamp);
+ tcp_send_head(sk)->skb_mstamp = tp->tcp_mstamp;
else if (icsk->icsk_user_timeout &&
(s32)(tcp_time_stamp - start_ts) > icsk->icsk_user_timeout)
goto abort;
@@ -561,6 +561,7 @@ void tcp_write_timer_handler(struct sock *sk)
goto out;
+ skb_mstamp_get(&tcp_sk(sk)->tcp_mstamp);
event = icsk->icsk_pending;
switch (event) {