netdev - Re: [PATCH 2/6] vxlan: Group Policy extension

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Date:	Tue, 13 Jan 2015 01:03:57 +0000
From:	Thomas Graf <tgraf@...g.ch>
To:	Tom Herbert <therbert@...gle.com>
Cc:	David Miller <davem@...emloft.net>, Jesse Gross <jesse@...ira.com>,
	Stephen Hemminger <stephen@...workplumber.org>,
	Pravin B Shelar <pshelar@...ira.com>,
	Alexei Starovoitov <alexei.starovoitov@...il.com>,
	Linux Netdev List <netdev@...r.kernel.org>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>
Subject: Re: [PATCH 2/6] vxlan: Group Policy extension

On 01/12/15 at 10:14am, Tom Herbert wrote:
> > diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
> > index f7d0d2d..9f07bf5 100644
> > --- a/include/uapi/linux/if_link.h
> > +++ b/include/uapi/linux/if_link.h
> > @@ -370,10 +370,18 @@ enum {
> >         IFLA_VXLAN_UDP_CSUM,
> >         IFLA_VXLAN_UDP_ZERO_CSUM6_TX,
> >         IFLA_VXLAN_UDP_ZERO_CSUM6_RX,
> > +       IFLA_VXLAN_EXTENSION,
> >         __IFLA_VXLAN_MAX
> >  };
> >  #define IFLA_VXLAN_MAX (__IFLA_VXLAN_MAX - 1)
> >
> > +enum {
> > +       IFLA_VXLAN_EXT_UNSPEC,
> > +       IFLA_VXLAN_EXT_GBP,
> > +       __IFLA_VXLAN_EXT_MAX,
> > +};
> > +#define IFLA_VXLAN_EXT_MAX (__IFLA_VXLAN_EXT_MAX - 1)
> > +
> 
> Creating a level of indirection for extensions seems overly
> complicated to me. Why not just define IFLA_VXLAN_GBP as just another
> enum above?

I think it's cleaner to group them in a nested attribute.
It clearly separates the optional extensions from the base
attributes. RCO, GPE, GBP can all live in there.
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