netdev - Re: [RFC PATCH] net: Add sock_common

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Date:	Thu, 11 Jun 2015 07:25:43 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Firo Yang <firogm@...il.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, gerrit@....abdn.ac.uk,
	yoshfuji@...ux-ipv6.org, jmorris@...ei.org, kuznet@....inr.ac.ru,
	herbert@...dor.apana.org.au, ast@...mgrid.com, dborkman@...hat.com,
	ebiederm@...ssion.com, dan.carpenter@...cle.com,
	Julia.Lawall@...6.fr, kernel-janitors@...r.kernel.org
Subject: Re: [RFC PATCH] net: Add sock_common_listen for TCP and DCCP

On Thu, 2015-06-11 at 19:05 +0800, Firo Yang wrote:
> Code refactoring:
> 1. Move the common code of inet_listen() and inet_dccp_listen() to
> sock_common_listen().
> Add new state SOCK_LISTEN and SOCK_CLOSE for sock_common_listen().
> 
> 2. Modify and rename inet_listen() to tcp_listen().
> 
> 3. Modify and rename inet_dccp_listen() to dccp_listen().
> 
> 4. Add new callback pointer listen in struct proto for
> tcp_listen() and dccp_listen().
> 
> This patch makes codes more modularized and removes redudant codes.
> 
> Signed-off-by: Firo Yang <firogm@...il.com>
> ---
> I test it on my x86 pc.
> 
>  include/net/sock.h  | 18 ++++++++++++++++
>  include/net/tcp.h   |  1 +
>  net/core/sock.c     | 36 +++++++++++++++++++++++++++++++
>  net/dccp/dccp.h     |  2 +-
>  net/dccp/ipv4.c     |  4 ++--
>  net/dccp/ipv6.c     |  3 ++-
>  net/dccp/proto.c    | 62 ++++++++++++++++-------------------------------------
>  net/ipv4/af_inet.c  | 58 +------------------------------------------------
>  net/ipv4/tcp.c      | 35 ++++++++++++++++++++++++++++++
>  net/ipv4/tcp_ipv4.c |  1 +
>  net/ipv6/af_inet6.c |  2 +-
>  net/ipv6/tcp_ipv6.c |  1 +
>  12 files changed, 118 insertions(+), 105 deletions(-)
> 
> diff --git a/include/net/sock.h b/include/net/sock.h
> index 26c1c31..5adc7f4 100644
> --- a/include/net/sock.h
> +++ b/include/net/sock.h
> @@ -934,6 +934,7 @@ struct proto {
>  	int			(*connect)(struct sock *sk,
>  					struct sockaddr *uaddr,
>  					int addr_len);
> +	int			(*listen)(struct sock *sk, int backlog);
>  	int			(*disconnect)(struct sock *sk, int flags);
>  
>  	struct sock *		(*accept)(struct sock *sk, int flags, int *err);
> @@ -1349,6 +1350,21 @@ void sk_prot_clear_portaddr_nulls(struct sock *sk, int size);
>  #define SOCK_BINDADDR_LOCK	4
>  #define SOCK_BINDPORT_LOCK	8
>  
> +/*
> + * Sock common state
> + * These values must be enqual to correspondent TCP state
> + * and DCCP state.
> + */
> +enum {
> +	SOCK_CLOSE	= TCP_CLOSE,
> +	SOCK_LISTEN	= TCP_LISTEN
> +};
> +
> +enum {
> +	SOCKF_CLOSE	= TCPF_CLOSE,
> +	SOCKF_LISTEN	= TCPF_LISTEN,
> +};
> +

You know, TCP_CLOSE and TCP_LISTEN are really legacy states for
sk_state, this is not going to change anytime soon.


I prefer to keep using TCP_xxxx names and not adding aliases.

Otherwise your patch looks fine to me, thanks.



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