netdev - Re: [patch net-next RFC 0/4] introduce infrastructure for support of switch chip datapath

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Message-ID: <5333FFFF.1050005@mojatatu.com>
Date:	Thu, 27 Mar 2014 06:39:59 -0400
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	Jiri Pirko <jiri@...nulli.us>,
	Florian Fainelli <f.fainelli@...il.com>
CC:	Roopa Prabhu <roopa@...ulusnetworks.com>,
	Neil Horman <nhorman@...driver.com>,
	Thomas Graf <tgraf@...g.ch>, netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	Andy Gospodarek <andy@...yhouse.net>,
	dborkman <dborkman@...hat.com>, ogerlitz <ogerlitz@...lanox.com>,
	jesse <jesse@...ira.com>, pshelar <pshelar@...ira.com>,
	azhou <azhou@...ira.com>, Ben Hutchings <ben@...adent.org.uk>,
	Stephen Hemminger <stephen@...workplumber.org>,
	jeffrey.t.kirsher@...el.com, vyasevic <vyasevic@...hat.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	John Fastabend <john.r.fastabend@...el.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Scott Feldman <sfeldma@...ulusnetworks.com>,
	Lennert Buytenhek <buytenh@...tstofly.org>,
	Shrijeet Mukherjee <shm@...ulusnetworks.com>,
	Felix Fietkau <nbd@...nwrt.org>
Subject: Re: [patch net-next RFC 0/4] introduce infrastructure for support
 of switch chip datapath

On 03/27/14 02:56, Jiri Pirko wrote:
> Wed, Mar 26, 2014 at 11:22:51PM CET, f.fainelli@...il.com wrote:

>
> I believe that hawing both sw1p3 and eth0 is the correct way of
> modelling this. sw1p3 is instance if switch chip driver representing the
> actual port of a switch. eth0 is an instance of some other ordinary NIC
> driver (8139too is my favorite :))
>
> This model allows to draw the exact picture.
> Also, when you add the described possibility to use iplink to build
> vlans, bridges whatever on the switch ports, it makes perfect sense to
> have this model.
>
> Merging sw1p3 and eth0 would cause a loose of information and confusion.

I think that if eth0 and sw1p3 have different control interfaces i
agree.

Jiri, sorry - didnt respond to your other email on your patch. My
comment was on newlink() interface - i was wondering about why it was
there i.e as in allowing user space to create switch ports.

cheers,
jamal
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