netdev - Re: [PATCH] Document the kernel

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Date:	Fri, 10 Dec 2010 09:28:36 -0800
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Martin Lucina <mato@...elna.sk>
Cc:	netdev@...r.kernel.org, Martin Sustrik <sustrik@...bpm.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] Document the kernel_recvmsg() function

On Fri, 10 Dec 2010 11:04:05 +0100 Martin Lucina wrote:

> [Updated and sent to the netdev mailing list, Eric thx for the pointer]
> 
> Hi,
> 
> so, today we spent all day figuring out how the kernel_sendmsg() function

                                                  ^^^^^^^^^^^^^^

Maybe you could document that one also??  Thanks.


> *actually* works. This patch adds some documentation to help the next poor
> sod.
> 
> -mato
> 
> From 1a977fc0b9544c53761ba3c4c26ca1aac2018663 Mon Sep 17 00:00:00 2001
> From: Martin Lucina <mato@...elna.sk>
> Date: Thu, 9 Dec 2010 17:11:18 +0100
> Subject: [PATCH] Document the kernel_recvmsg() function
> 
> Signed-off-by: Martin Lucina <mato@...elna.sk>
> ---
>  net/socket.c |   15 +++++++++++++++
>  1 files changed, 15 insertions(+), 0 deletions(-)
> 
> diff --git a/net/socket.c b/net/socket.c
> index 3ca2fd9..088fb3f 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -732,6 +732,21 @@ static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
>  	return ret;
>  }
>  
> +/**
> + * kernel_recvmsg - Receive a message from a socket (kernel space)
> + * @sock:       The socket to receive the message from
> + * @msg:        Received message
> + * @vec:        Input s/g array for message data
> + * @num:        Size of input s/g array
> + * @size:       Number of bytes to read
> + * @flags:      Message flags (MSG_DONTWAIT, etc...)
> + *
> + * On return the msg structure contains the scatter/gather array passed in the
> + * vec argument. The array is modified so that it consists of the unfilled
> + * portion of the original array.
> + *
> + * The returned value is the total number of bytes received, or an error.
> + */
>  int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
>  		   struct kvec *vec, size_t num, size_t size, int flags)
>  {
> -- 


---
~Randy
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