netdev - [RFC PATCH net-next 0/2] devlink: Add port stats

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Message-ID: <20220407084050.184989-1-michaelgur@nvidia.com>
Date:   Thu, 7 Apr 2022 11:40:48 +0300
From:   Michael Guralnik <michaelgur@...dia.com>
To:     <netdev@...r.kernel.org>
CC:     <jiri@...dia.com>, <ariela@...dia.com>, <maorg@...dia.com>,
        <saeedm@...dia.com>, <kuba@...nel.org>, <moshe@...dia.com>,
        Michael Guralnik <michaelgur@...dia.com>
Subject: [RFC PATCH net-next 0/2] devlink: Add port stats

This patch set adds port statistics to the devlink port object.
It allows device drivers to dynamically attach and detach counters from a
devlink port object.

The approach of adding object-attached statistics is already supported for trap
with traffic statistics and for the dev object with reload statistics.
For the port object, this will allow the device driver to expose and dynamicly
control a set of metrics related to the port.
Currently we add support only for counters, but later API extensions can be made
to support histograms or configurable counters.

The statistics are exposed to the user with the port get command.

Example:
# devlink -s port show
pci/0000:00:0b.0/65535: type eth netdev eth1 flavour physical port 0 splittable false
  stats:
    counter1 235
    counter2 18

Michael Guralnik (2):
  devlink: Introduce stats to the port object
  devlink: Add statistics to port get

 include/net/devlink.h        |  28 +++++++++
 include/uapi/linux/devlink.h |   4 ++
 net/core/devlink.c           | 119 +++++++++++++++++++++++++++++++++++
 3 files changed, 151 insertions(+)

-- 
2.17.2