netdev - Re: [RFC PATCH net-next 0/8] Expose devlink port attributes

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Date:   Wed, 3 Jun 2020 12:45:04 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Danielle Ratson <danieller@...lanox.com>, netdev@...r.kernel.org,
        davem@...emloft.net, michael.chan@...adcom.com,
        jeffrey.t.kirsher@...el.com, saeedm@...lanox.com, leon@...nel.org,
        jiri@...lanox.com, idosch@...lanox.com, snelson@...sando.io,
        drivers@...sando.io, andrew@...n.ch, vivien.didelot@...il.com,
        f.fainelli@...il.com, mlxsw@...lanox.com
Subject: Re: [RFC PATCH net-next 0/8] Expose devlink port attributes

Tue, Jun 02, 2020 at 09:33:11PM CEST, kuba@...nel.org wrote:
>On Tue,  2 Jun 2020 14:31:11 +0300 Danielle Ratson wrote:
>> Currently, user has no way of knowing if a port can be split and into
>> how many ports.
>> 
>> Among other things, it is currently impossible to write generic tests
>> for port split.
>> 
>> In order to be able to expose the information regarding the split
>> capability to user space, set the required attributes and pass them to
>> netlink.
>> 
>> Patch 1: Move set attribute from devlink_port_attrs to devlink_port.
>> Patch 2: Move switch_port attribute from devlink_port_attrs to devlink_port
>> Patch 3: Replace devlink_port_attrs_set parameters with a struct.
>> Patch 4: Set and initialize lanes attribute in the driver.
>> Patch 5: Add lanes attribute to devlink port and pass to netlink.
>> Patch 6: Set and initialize splittable attribute in the driver.
>> Patch 7: Add splittable attribute to devlink port and pass them to netlink.
>> Patch 8: Add a split port test.
>
>Since we have the splitability and number of lanes now understood by
>the core - can the code also start doing more input checking?

Yep, that should certainly be done so some of the checks can move from
the drivers. Do you want to have this done as a part of this patchset or
a separate one?