netdev - Re: [PATCH nf-next] netfilter: nfnetlink

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Message-ID: <20130319225243.GA3657@localhost>
Date:	Tue, 19 Mar 2013 23:52:43 +0100
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev <netdev@...r.kernel.org>,
	Netfilter Developer Mailing List 
	<netfilter-devel@...r.kernel.org>
Subject: Re: [PATCH nf-next] netfilter: nfnetlink_queue: zero copy support

On Sun, Mar 17, 2013 at 08:15:55PM -0700, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> nfqnl_build_packet_message() actually copy the packet
> inside the netlink message, while it can instead use
> zero copy.
> 
> Make sure the skb 'copy' is the last component of the
> cooked netlink message, as we cant add anything after it.
> 
> Patch cooked in Copenhagen at Netfilter Workshop ;)
> 
> Still to be addressed in separate patches :
> 
> -GRO/GSO packets are segmented in nf_queue()
> and checksummed in nfqnl_build_packet_message().
> 
> Proper support for GSO/GRO packets (no segmentation,
> and no checksumming) needs application cooperation, if we
> want no regressions.

Applied, thanks.
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