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| author | Neal Cardwell <ncardwell@google.com> | 2012-09-22 04:18:54 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-22 15:47:10 -0400 |
| commit | 623df484a777f3c00c1ea3d6a7565b8d8ac688a1 (patch) | |
| tree | 6394f6b3bac15a274dbaecc4c5d46761f838f2ca /include/net | |
| parent | de46584675fad02b7f8255f31be0ea1be5cd185b (diff) | |
| download | linux-3.10-623df484a777f3c00c1ea3d6a7565b8d8ac688a1.tar.gz linux-3.10-623df484a777f3c00c1ea3d6a7565b8d8ac688a1.tar.bz2 linux-3.10-623df484a777f3c00c1ea3d6a7565b8d8ac688a1.zip | |
tcp: extract code to compute SYNACK RTT
In preparation for adding another spot where we compute the SYNACK
RTT, extract this code so that it can be shared.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/tcp.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index a8cb00c0c6d..a718d0e3d8e 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1137,6 +1137,15 @@ static inline void tcp_openreq_init(struct request_sock *req, ireq->loc_port = tcp_hdr(skb)->dest; } +/* Compute time elapsed between SYNACK and the ACK completing 3WHS */ +static inline void tcp_synack_rtt_meas(struct sock *sk, + struct request_sock *req) +{ + if (tcp_rsk(req)->snt_synack) + tcp_valid_rtt_meas(sk, + tcp_time_stamp - tcp_rsk(req)->snt_synack); +} + extern void tcp_enter_memory_pressure(struct sock *sk); static inline int keepalive_intvl_when(const struct tcp_sock *tp) |