From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH v2 5/7] net-tcp: Fast Open client -
 sendmsg(MSG_FASTOPEN)
Date: Wed, 18 Jul 2012 23:30:09 +0200
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	netdev@vger.kernel.org
To: Yuchung Cheng <ycheng@google.com>
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On Wed, 2012-07-18 at 14:01 -0700, Yuchung Cheng wrote:
> sendmsg() (or sendto()) with MSG_FASTOPEN is a combo of connect(2)
> and write(2). The application should replace connect() with it to
> send data in the opening SYN packet.
> 

> index 25d6322..90297db 100644
> --- a/include/linux/socket.h
> +++ b/include/linux/socket.h
> @@ -276,6 +276,7 @@ struct ucred {
>  #else
>  #define MSG_CMSG_COMPAT	0		/* We never have 32 bit fixups */
>  #endif
> +#define MSG_FASTOPEN	0x20000000 /* Send data in TCP SYN */

Could you put MSG_FASTOPEN before MSG_CMSG_CLOEXEC ?