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| 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 /include/uapi | |
| parent | e6e71054cd9f98c8ebb3a5f66f2776a9736afc87 (diff) | |
| download | linux-6f73601efb35c7003f5c58c2bc6fd08f3652169c.tar.gz linux-6f73601efb35c7003f5c58c2bc6fd08f3652169c.tar.xz | |
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 'include/uapi')
| -rw-r--r-- | include/uapi/linux/tcp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index c4b89a5cb7df..e962faa5ab0d 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -130,6 +130,7 @@ enum { #define TCPI_OPT_WSCALE 4 #define TCPI_OPT_ECN 8 /* ECN was negociated at TCP session init */ #define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */ +#define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */ enum tcp_ca_state { TCP_CA_Open = 0, |