netdev - [PATCH v3 net-next 0/3] net/sched: act_police: add support for packet-per-second policing

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Date:   Fri, 12 Mar 2021 15:08:28 +0100
From:   Simon Horman <simon.horman@...ronome.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        Xingfeng Hu <xingfeng.hu@...igine.com>,
        Baowen Zheng <baowen.zheng@...igine.com>,
        Louis Peens <louis.peens@...ronome.com>,
        Simon Horman <simon.horman@...ronome.com>
Subject: [PATCH v3 net-next 0/3] net/sched: act_police: add support for packet-per-second policing

This series enhances the TC policer action implementation to allow a
policer action instance to enforce a rate-limit based on
packets-per-second, configurable using a packet-per-second rate and burst
parameters.

In the hope of aiding review this is broken up into three patches.

* [PATCH 1/3] flow_offload: add support for packet-per-second policing

  Add support for this feature to the flow_offload API that is used to allow
  programming flows, including TC rules and their actions, into hardware.

* [PATCH 2/3] flow_offload: reject configuration of packet-per-second policing in offload drivers

  Teach all exiting users of the flow_offload API that allow offload of
  policer action instances to reject offload if packet-per-second rate
  limiting is configured: none support it at this time

* [PATCH 3/3] net/sched: act_police: add support for packet-per-second policing

  With the above ground-work in place add the new feature to the TC policer
  action itself

With the above in place the feature may be used.

As follow-ups we plan to provide:
* Corresponding updates to iproute2
* Corresponding self tests (which depend on the iproute2 changes)
* Hardware offload support for the NFP driver

Key changes since v2:
* Added patches 1 and 2, which makes adding patch 3 safe for existing
  hardware offload of the policer action
* Re-worked patch 3 so that a TC policer action instance may be configured
  for packet-per-second or byte-per-second rate limiting, but not both.
* Corrected kdoc usage

Baowen Zheng (2):
  flow_offload: reject configuration of packet-per-second policing in
    offload drivers
  net/sched: act_police: add support for packet-per-second policing

Xingfeng Hu (1):
  flow_offload: add support for packet-per-second policing

 drivers/net/dsa/sja1105/sja1105_flower.c      |  6 ++
 .../chelsio/cxgb4/cxgb4_tc_matchall.c         | 11 ++-
 .../net/ethernet/freescale/enetc/enetc_qos.c  |  5 ++
 .../net/ethernet/mellanox/mlx5/core/en_tc.c   |  4 +
 .../ethernet/mellanox/mlxsw/spectrum_flower.c |  5 ++
 drivers/net/ethernet/mscc/ocelot_flower.c     |  5 ++
 drivers/net/ethernet/mscc/ocelot_net.c        |  6 ++
 .../ethernet/netronome/nfp/flower/qos_conf.c  |  5 ++
 include/net/flow_offload.h                    |  2 +
 include/net/sch_generic.h                     | 14 ++++
 include/net/tc_act/tc_police.h                | 52 +++++++++++++
 include/uapi/linux/pkt_cls.h                  |  2 +
 net/sched/act_police.c                        | 59 +++++++++++++--
 net/sched/cls_api.c                           |  3 +
 net/sched/sch_generic.c                       | 75 ++++++++++++-------
 15 files changed, 221 insertions(+), 33 deletions(-)

-- 
2.20.1