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authorYuchung Cheng <ycheng@google.com>2012-10-19 15:14:44 +0000
committerDavid S. Miller <davem@davemloft.net>2012-10-22 15:16:06 -0400
commit6f73601efb35c7003f5c58c2bc6fd08f3652169c (patch)
treef77807af2f6bbe08104b4563eb150e9e425dfce6 /net/ipv4/tcp_minisocks.c
parente6e71054cd9f98c8ebb3a5f66f2776a9736afc87 (diff)
downloadop-kernel-dev-6f73601efb35c7003f5c58c2bc6fd08f3652169c.zip
op-kernel-dev-6f73601efb35c7003f5c58c2bc6fd08f3652169c.tar.gz
tcp: add SYN/data info to TCP_INFO
Add a bit TCPI_OPT_SYN_DATA (32) to the socket option TCP_INFO:tcpi_options. It's set if the data in SYN (sent or received) is acked by SYN-ACK. Server or client application can use this information to check Fast Open success rate. Signed-off-by: Yuchung Cheng <ycheng@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
-rw-r--r--net/ipv4/tcp_minisocks.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 27536ba..a7302d9 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -510,6 +510,7 @@ struct sock *tcp_create_openreq_child(struct sock *sk, struct request_sock *req,
newtp->rx_opt.mss_clamp = req->mss;
TCP_ECN_openreq_child(newtp, req);
newtp->fastopen_rsk = NULL;
+ newtp->syn_data_acked = 0;
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_PASSIVEOPENS);
}
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