netdev - Re: [PATCH net] netdevsim: Restore per-network namespace accounting for fib entries

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Date:   Tue, 13 Aug 2019 08:41:18 -0600
From:   David Ahern <dsahern@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>, David Miller <davem@...emloft.net>
Cc:     dsahern@...nel.org, netdev@...r.kernel.org
Subject: Re: [PATCH net] netdevsim: Restore per-network namespace accounting
 for fib entries

On 8/13/19 1:14 AM, Jiri Pirko wrote:
> Mon, Aug 12, 2019 at 05:28:02PM CEST, davem@...emloft.net wrote:
>> From: Jiri Pirko <jiri@...nulli.us>
>> Date: Mon, 12 Aug 2019 10:36:35 +0200
>>
>>> I understand it with real devices, but dummy testing device, who's
>>> purpose is just to test API. Why?
>>
>> Because you'll break all of the wonderful testing infrastructure
>> people like David have created.
>  
> Are you referring to selftests? There is no such test there :(

I  have one now and will be submitting it after net merges with net-next.

> But if it would be, could implement the limitations
> properly (like using cgroups), change the tests and remove this
> code from netdevsim?

The intent of this code and test is to have a s/w model similar to how
mlxsw works - responding to notifiers and deciding to reject a change.
You are currently adding (or trying to) more devlink based s/w tests, so
you must see the value of netdevsim as a source of testing.