netdev - Re: [PATCH net-next 6/6] netdevsim: Add simple FIB resource controller via devlink

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Message-ID: <e9c59b0c-328e-d343-6e8d-d19f643d2e9d@cumulusnetworks.com>
Date:   Thu, 5 Apr 2018 15:06:41 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net,
        roopa@...ulusnetworks.com, shm@...ulusnetworks.com,
        jiri@...lanox.com, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, andy.roulin@...il.com
Subject: Re: [PATCH net-next 6/6] netdevsim: Add simple FIB resource
 controller via devlink

On 4/5/18 2:10 PM, David Ahern wrote:
> 
> The ASIC here is the kernel tables in a namespace. It does not make
> sense to have 2 devlink instances for a single namespace.

I put this example controller in netdevsim per a suggestion from Ido.
The netdevsim seemed like a good idea given that modules intention --
testing network facilities. Perhaps I should have done this as a
completely standalone module ...

The intention is to treat the kernel's tables *per namespace* as a
standalone entity that can be managed very similar to ASIC resources.
Given that I can add a resource controller module
(drivers/net/kern_res_mgr.c?) that creates a 'struct device' per network
namespace with a devlink instance. In this case the device would very
much be tied to the namespace 1:1.