netdev - Re: [PATCH 6/6] openvswitch: Support VXLAN Group Policy extension

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Date:	Thu, 8 Jan 2015 10:22:12 +0000
From:	Thomas Graf <tgraf@...g.ch>
To:	Jesse Gross <jesse@...ira.com>
Cc:	David Miller <davem@...emloft.net>,
	Stephen Hemminger <stephen@...workplumber.org>,
	Pravin Shelar <pshelar@...ira.com>,
	netdev <netdev@...r.kernel.org>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>
Subject: Re: [PATCH 6/6] openvswitch: Support VXLAN Group Policy extension

On 01/07/15 at 05:18pm, Jesse Gross wrote:
> On Wed, Jan 7, 2015 at 3:01 PM, Thomas Graf <tgraf@...g.ch> wrote:
> > The encoding will be based on struct ovs_vxlan_opts which is extended
> > as needed by appending new members to the end of the struct. Parsers
> > will look at the provided length to see which fields are provided.
> 
> But this means that if there are two extensions that are conflicting
> or if one is retired you still need to carry the earlier members of
> the struct. Why not make them real netlink attributes?

I figured that due to the limited space available in the VXLAN header
the structure would never grow big. I have no problem converting this
to use Netlink attributes internally though. Will address this in v2.
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