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authorNeal Cardwell <ncardwell@google.com>2012-09-22 04:18:54 +0000
committerDavid S. Miller <davem@davemloft.net>2012-09-22 15:47:10 -0400
commit623df484a777f3c00c1ea3d6a7565b8d8ac688a1 (patch)
tree6394f6b3bac15a274dbaecc4c5d46761f838f2ca /include/net/tcp.h
parentde46584675fad02b7f8255f31be0ea1be5cd185b (diff)
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/tcp.h')
-rw-r--r--include/net/tcp.h9
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)