diff options
| author | Yuchung Cheng <ycheng@google.com> | 2012-10-19 15:14:44 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-10-22 15:16:06 -0400 |
| commit | 6f73601efb35c7003f5c58c2bc6fd08f3652169c (patch) | |
| tree | f77807af2f6bbe08104b4563eb150e9e425dfce6 /net/ipv4/tcp.c | |
| parent | e6e71054cd9f98c8ebb3a5f66f2776a9736afc87 (diff) | |
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.c')
| -rw-r--r-- | net/ipv4/tcp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index b7c2f439b54f..197c0008503c 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2764,6 +2764,8 @@ void tcp_get_info(const struct sock *sk, struct tcp_info *info) info->tcpi_options |= TCPI_OPT_ECN; if (tp->ecn_flags & TCP_ECN_SEEN) info->tcpi_options |= TCPI_OPT_ECN_SEEN; + if (tp->syn_data_acked) + info->tcpi_options |= TCPI_OPT_SYN_DATA; info->tcpi_rto = jiffies_to_usecs(icsk->icsk_rto); info->tcpi_ato = jiffies_to_usecs(icsk->icsk_ack.ato); |