netdev - Re: [PATCH net-next v2 2/4] net: add IPv4 routing FIB support for switchdev

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Message-Id: <20150302.173109.749741045898697218.davem@davemloft.net>
Date:	Mon, 02 Mar 2015 17:31:09 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	sridhar.samudrala@...el.com
Cc:	sfeldma@...il.com, netdev@...r.kernel.org, jiri@...nulli.us,
	roopa@...ulusnetworks.com
Subject: Re: [PATCH net-next v2 2/4] net: add IPv4 routing FIB support for
 switchdev

From: "Samudrala, Sridhar" <sridhar.samudrala@...el.com>
Date: Mon, 02 Mar 2015 14:27:04 -0800

> Don't we need ndo's to offload adding/deleting neighbor table entries
> and router interface or gateway addresses?
> Is it expected that the switch driver can program the hardware in
> response to the neighbor update events?

The neighbour layer is used to translate IPv4 nexthop addresses into
MAC addresses.  The neighbour layer sends notifications when neigh
entries change, and that is what the driver listens to in order to
reprogram the hardware when necessary.

The rocker driver implementation of these callbacks should have made
this clear.
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