On Wed, Jan 18, 2017 at 01:45:14PM -0800, Bart Van Assche wrote:

On 01/18/2017 10:31 AM, Jason Gunthorpe wrote:

quoted

I think it depends on what this tool is supposed to cover, but based
on the description, I would start with netlink-only.

The only place verbs covers a similar ground is in 'device
capabilities' - for some of that you might want to open a new-uAPI
verbs fd, but even the capability data from that would not be
totally offensive to be accessed over netlink.

IMHO netlink should cover almost everything found in sysfs today.

We would need a very strong argument to introduce a netlink API that
duplicates existing sysfs API functionality. Since the sysfs API is
extensible, why not extend that API further? E.g. the SCST sysfs API
shows that more is possible with sysfs than what most kernel drivers
realize.

We didn't look deeply on sysfs mainly because it is unpopular
in netdev community. Maybe we were misled and it is simply not true.

Bart.
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