diff options
| author |   Eric Dumazet <edumazet@google.com> | 2017-04-25 10:15:32 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-04-26 14:44:36 -0400 |
| commit | 69e996c58a35db9ca79b3f021a15bcd22202e1c0 (patch) | |
| tree | b01b75a8c41fe86ab2ce1fc88198c4f347268171 /net/ipv4/tcp_input.c | |
| parent | rhashtable: remove insecure_max_entries param (diff) | |
| download | linux-dev-69e996c58a35db9ca79b3f021a15bcd22202e1c0.tar.xz linux-dev-69e996c58a35db9ca79b3f021a15bcd22202e1c0.zip | |
tcp: add tp->tcp_mstamp field
We want to use precise timestamps in TCP stack, but we do not
want to call possibly expensive kernel time services too often.
tp->tcp_mstamp is guaranteed to be updated once per incoming packet.
We will use it in the following patches, removing specific
skb_mstamp_get() calls, and removing ack_time from
struct tcp_sacktag_state.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/ipv4/tcp_input.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 5af2f04f8859..bd18c65df4a9 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -5362,6 +5362,7 @@ void tcp_rcv_established(struct sock *sk, struct sk_buff *skb, { struct tcp_sock *tp = tcp_sk(sk); + skb_mstamp_get(&tp->tcp_mstamp); if (unlikely(!sk->sk_rx_dst)) inet_csk(sk)->icsk_af_ops->sk_rx_dst_set(sk, skb); /* @@ -5922,6 +5923,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb) case TCP_SYN_SENT: tp->rx_opt.saw_tstamp = 0; + skb_mstamp_get(&tp->tcp_mstamp); queued = tcp_rcv_synsent_state_process(sk, skb, th); if (queued >= 0) return queued; @@ -5933,6 +5935,7 @@ int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb) return 0; } + skb_mstamp_get(&tp->tcp_mstamp); tp->rx_opt.saw_tstamp = 0; req = tp->fastopen_rsk; if (req) { |