netdev - Re: Netlink limitations

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Message-ID: <20101109233550.GD11005@canuck.infradead.org>
Date:	Tue, 9 Nov 2010 18:35:50 -0500
From:	Thomas Graf <tgraf@...radead.org>
To:	Jan Engelhardt <jengelh@...ozas.de>
Cc:	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>, pablo@...filter.org,
	netdev@...r.kernel.org
Subject: Re: Netlink limitations

On Tue, Nov 09, 2010 at 11:02:30PM +0100, Jan Engelhardt wrote:
> 
> On Tuesday 2010-11-09 22:40, Thomas Graf wrote:
> >The addition won't be a revolution but it the increased header size,
> >8 vs. 12 bytes isn't a big deal and gives us some additional room to
> >work with in the future.
> >
> >struct nlattr_ext {
> >	u16	oldlen;		/* 0 */
> >	u16	kind;		/* TCA_* */
> >	u8	type;		/* NLA_U32 */
> >	u8	flags;		/* NLA_F_* */
> >	u16	reserved;
> >	u32	length;
> >};
> 
> And while we're discussing this, surely there are no objections
> to bumping NLA_ALIGN to 8 at the same time..

We can't do that. That would break _everything_.
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