netdev - Re: [patch net-next 3/9] mlx4: Implement port type setting via devlink interface

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Message-ID: <20160223153023.GJ2140@nanopsycho.orion>
Date:	Tue, 23 Feb 2016 16:30:23 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, idosch@...lanox.com,
	eladr@...lanox.com, yotamg@...lanox.com, ogerlitz@...lanox.com,
	yishaih@...lanox.com, dledford@...hat.com, sean.hefty@...el.com,
	hal.rosenstock@...il.com, eugenia@...lanox.com,
	roopa@...ulusnetworks.com, nikolay@...ulusnetworks.com,
	hadarh@...lanox.com, jhs@...atatu.com, john.fastabend@...il.com,
	jeffrey.t.kirsher@...el.com, brouer@...hat.com, ivecera@...hat.com,
	rami.rosen@...el.com
Subject: Re: [patch net-next 3/9] mlx4: Implement port type setting via
 devlink interface

Tue, Feb 23, 2016 at 04:16:11PM CET, hannes@...essinduktion.org wrote:

<snip>

>>>1) is easily solvable, just drop the ifindex style attributes and always
>>>force the user to enter the bus and bus-topology id.
>>
>>But why? Use can easily get that info and map it to devlink index. It
>>aligns with nl80211 iface.
>>
>>Do you really want to do commands like:
>>myhost:~$ dl dev show pci_0000:01:00.0
>> ?
>
>Yes, exactly I would. I would put them into a boot-up script based on my
>system configuration and can be sure it will work the next boot, too, and
>adapt them when I replace the hardware or do some configuration changes.
>
>I think sysadmins or scripts are the primary users of this interface not
>kernel developers which switch their settings around all the time, no?

I can easily add this to the userspace tool to accept "pci_0000:01:00.0"
format and to map it internally to devlink index. No problem.