netdev - Re: [patch net-next v2 00/10] Add support for resource abstraction

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Date:   Wed, 27 Dec 2017 14:08:03 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     David Ahern <dsa@...ulusnetworks.com>, netdev@...r.kernel.org,
        davem@...emloft.net, arkadis@...lanox.com, mlxsw@...lanox.com,
        vivien.didelot@...oirfairelinux.com, f.fainelli@...il.com,
        michael.chan@...adcom.com, ganeshgr@...lsio.com,
        saeedm@...lanox.com, matanb@...lanox.com, leonro@...lanox.com,
        idosch@...lanox.com, jakub.kicinski@...ronome.com, ast@...nel.org,
        daniel@...earbox.net, simon.horman@...ronome.com,
        pieter.jansenvanvuuren@...ronome.com, john.hurley@...ronome.com,
        alexander.h.duyck@...el.com, linville@...driver.com,
        gospo@...adcom.com, steven.lin1@...adcom.com, yuvalm@...lanox.com,
        ogerlitz@...lanox.com, roopa@...ulusnetworks.com
Subject: Re: [patch net-next v2 00/10] Add support for resource abstraction

> This is misunderstanding I believe. This is not about ABI. That is well
> defined by the netlink attributes. This is about meaning of particular
> ASIC-specific internal resources.

I would agree that the netlink attributed are clearly defined. But the
meta information, what this ASIC specific internal resource means when
you combine these attributes, is unclear. This meta information is
also part of the ABI, and documenting giving users a hit what it
means, and why they should change it, would be good practice.

Look at sysfs. open/read/write are clearly defined, which is the
equivalent of the netlink attributes. The meta information we document
in Documentation/ABI/, what a file name means, what a value means,
what other values it can take, etc.

     Andrew