linux-kernel - Re: [PATCH][RFC 23/23]: Support for zero-copy TCP transmit of user space data

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Message-ID: <e2e108260812160800h66e525f2p8c6c78b1b73630d1@mail.gmail.com>
Date:	Tue, 16 Dec 2008 17:00:07 +0100
From:	"Bart Van Assche" <bart.vanassche@...il.com>
To:	"Evgeniy Polyakov" <zbr@...emap.net>
Cc:	"Vladislav Bolkhovitin" <vst@...b.net>, linux-scsi@...r.kernel.org,
	"James Bottomley" <James.Bottomley@...senpartnership.com>,
	linux-kernel@...r.kernel.org, scst-devel@...ts.sourceforge.net,
	netdev@...r.kernel.org
Subject: Re: [PATCH][RFC 23/23]: Support for zero-copy TCP transmit of user space data

On Wed, Dec 10, 2008 at 10:45 PM, Evgeniy Polyakov <zbr@...emap.net> wrote:
> Another approach is to increase skb's shared data (at the end of the
> skb->data), and this approach was not frowned upon too much either, but
> it requires to mess with skb->destructor, which may not be appropriate
> in some cases. If iscsi does not use sockets (it does iirc), things are
> much simpler.

Hello Evgeniy,

Any idea whether it would be acceptable to extend "struct sock" with
one or two pointers to callback functions ? These callback functions
could be called from skb_release_data() etc. through the "struct sock*
sk" member of "struct sk_buff".

Bart.
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