netdev - Re: [PATCH] inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet

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Date:	Sat, 10 Jul 2010 21:45:18 -0700
From:	Dimitris Michailidis <dm@...lsio.com>
To:	Changli Gao <xiaosuo@...il.com>
CC:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	"Pekka Savola (ipv6)" <pekkas@...core.fi>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	Tom Herbert <therbert@...gle.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] inet, inet6: make tcp_sendmsg() and tcp_sendpage() through
 inet_sendmsg() and inet_sendpage()

Changli Gao wrote:

> diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
> index 3ceb025..1e5bad1 100644
> --- a/net/ipv4/af_inet.c
> +++ b/net/ipv4/af_inet.c
> @@ -727,28 +727,31 @@ int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
>  	sock_rps_record_flow(sk);
>  
>  	/* We may need to bind the socket. */
> -	if (!inet_sk(sk)->inet_num && inet_autobind(sk))
> +	if (!sk->sk_prot->no_autobind &&
> +	    !inet_sk(sk)->inet_num && inet_autobind(sk))
>  		return -EAGAIN;

I think it's better to test inet_num first since usually it's not 0.  With 
the above ordering protocols with no_autobind==false end up making two 
comparisons.
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