netdev - Re: [PATCH 3/3] [UDP]: Only increment counter on first peek/recv

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Date:	Wed, 05 Dec 2007 01:54:09 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert@...dor.apana.org.au
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 3/3] [UDP]: Only increment counter on first peek/recv

From: Herbert Xu <herbert@...dor.apana.org.au>
Date: Wed, 5 Dec 2007 00:03:10 +1100

> [UDP]: Only increment counter on first peek/recv
> 
> The previous move of the the UDP inDatagrams counter caused each
> peek of the same packet to be counted separately.  This may be
> undesirable.
> 
> This patch fixes this by adding a bit to sk_buff to record whether
> this packet has already been seen through skb_recv_datagram.  We
> then only increment the counter when the packet is seen for the
> first time.
> 
> The only dodgy part is the fact that skb_recv_datagram doesn't have
> a good way of returning this new bit of information.  So I've added
> a new function __skb_recv_datagram that does return this and made
> skb_recv_datagram a wrapper around it.
> 
> The plan is to eventually replace all uses of skb_recv_datagram with
> this new function at which time it can be renamed its proper name.
> 
> Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>

Applied, thanks for fixing all of this Herbert.
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