netdev - Re: [RFC] net,socket: introduce build_sockaddr_check helper to catch overflow at build time

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Message-Id: <20091022.044914.36401063.davem@davemloft.net>
Date:	Thu, 22 Oct 2009 04:49:14 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	gorcunov@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [RFC] net,socket: introduce build_sockaddr_check helper to
 catch overflow at build time

From: Cyrill Gorcunov <gorcunov@...il.com>
Date: Wed, 21 Oct 2009 21:07:32 +0400

> net,socket: introduce build_sockaddr_check helper to catch overflow at build time
> 
> proto_ops->getname implies copying protocol specific data
> into storage unit (particulary to __kernel_sockaddr_storage).
> So when one implements new protocol he either may keep this
> in mind (or may not).
> 
> Lets introduce build_sockaddr_check helper which check if
> storage unit is not overfowed. Note that the check is build
> time and introduce no slowdown at execution time.
> 
> Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>

Nice idea, and I wonder if we can automate it even further.
Perhaps some tag that gets put on the socket address type
definition or similar?
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