linux-kernel - Re: [PATCH 2/5] AF_RXRPC: Move generic skbuff stuff from XFRM code to generic code [try #2]

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Date:	Fri, 16 Mar 2007 13:36:08 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	David Howells <dhowells@...hat.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org, herbert.xu@...hat.com,
	linux-kernel@...r.kernel.org, hch@...radead.org,
	arjan@...radead.org
Subject: Re: [PATCH 2/5] AF_RXRPC: Move generic skbuff stuff from XFRM code to generic code [try #2]

On Fri, Mar 16, 2007 at 12:50:21PM +0000, David Howells wrote:
> Move generic skbuff stuff from XFRM code to generic code so that AF_RXRPC can
> use it too.
> 
> Signed-Off-By: David Howells <dhowells@...hat.com>
> ---
> 
>  include/linux/skbuff.h |    4 +
>  include/net/esp.h      |    2 -
>  net/core/skbuff.c      |  173 ++++++++++++++++++++++++++++++++++++++++++++++++
>  net/xfrm/xfrm_algo.c   |  169 -----------------------------------------------
>  4 files changed, 177 insertions(+), 171 deletions(-)

> --- a/include/linux/skbuff.h
> +++ b/include/linux/skbuff.h
> @@ -1481,5 +1481,9 @@ static inline int skb_is_gso(const struct sk_buff *skb)
>  	return skb_shinfo(skb)->gso_size;
>  }
>  
> +struct scatterlist;

normally we try to put structure forward declarations at the top of the
header instead of spreading it around all over.

> +extern int skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg, int offset, int len);
> +extern int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer);

please make sure no line is longer than 80 characters.  Also shouldn't
prototypes normally be above inlines?  Or at least grouped into logical
areas?

> +/*
> + * fill a scatter-gather list with pointers into a part of a socket buffer
> + * chain
> + */

This could probably use a kdoc comment now that it's a public symbol.

> +/*
> + * Check that skb data bits are writable. If they are not, copy data
> + * to newly created private area. If "tailbits" is given, make sure that
> + * tailbits bytes beyond current end of skb are writable.
> + *
> + * Returns amount of elements of scatterlist to load for subsequent
> + * transformations and pointer to writable trailer skb.
> + */

Same here.
-
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