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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_ipv4.c
parentsch_dsmark: Fix uninitialized variable warning. (diff)
downloadlinux-dev-385e20706facd376f27863bd55b7cc7720d3f27b.tar.xz
linux-dev-385e20706facd376f27863bd55b7cc7720d3f27b.zip
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 'net/ipv4/tcp_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 5ab2aac5ca19..d8fe25db79f2 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -483,6 +483,7 @@ void tcp_v4_err(struct sk_buff *icmp_skb, u32 info)
skb = tcp_write_queue_head(sk);
BUG_ON(!skb);
+ skb_mstamp_get(&tp->tcp_mstamp);
remaining = icsk->icsk_rto -
min(icsk->icsk_rto,
tcp_time_stamp - tcp_skb_timestamp(skb));