netdev - Re: [patch net-next RFC 0/6] Introduce devlink interface and first drivers to use it

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Message-ID: <20160203133356.GA2219@nanopsycho.orion>
Date:	Wed, 3 Feb 2016 14:33:56 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
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, jbenc@...hat.com
Subject: Re: [patch net-next RFC 0/6] Introduce devlink interface and first
 drivers to use it

Wed, Feb 03, 2016 at 02:31:33PM CET, brouer@...hat.com wrote:
>On Wed,  3 Feb 2016 11:47:56 +0100
>Jiri Pirko <jiri@...nulli.us> wrote:
>
>> From: Jiri Pirko <jiri@...lanox.com>
>> 
>> There a is need for some userspace API that would allow to expose things
>> that are not directly related to any device class like net_device of
>> ib_device, but rather chip-wide/switch-ASIC-wide stuff.
>> 
>> Use cases:
>> 1) get/set of port type (Ethernet/InfiniBand)
>> 2) monitoring of hardware messages to and from chip
>> 3) setting up port splitters - split port into multiple ones and squash again,
>>    enables usage of splitter cable
>> 4) setting up shared buffers - shared among multiple ports within one chip
>> 
>> First patch of this set introduces a new generic Netlink based interface,
>> called "devlink". It is similar to nl80211 model and it is heavily
>> influenced by it, including the API definition. The devlink introduction patch
>> implements use cases 1) and 2). Other 2 are in development atm and will
>> be addressed by follow-ups.
>> 
>> It is very convenient for drivers to use devlink, as you can see in other
>> patches in this set.
>> 
>> Counterpart for devlink is userspace tool called "dl". Command line interface
>> and outputs are derived from "ip" tool so it should be easy for users to get
>> used to it.
>> 
>> It is available here:
>> https://github.com/jpirko/devlink
>
>IHMO this very short command name "dl" is not an advantage.  It is
>simply too unspecific and short for a good Google search.  E.g. when
>searching for good examples for using "dl".  I think "devlink" would be
>better.  If you like short commands do: alias dl="devlink"

I was thinking about using "devlink". Decided to go with shortened
version so this is in-line with "ip". But you have a point.