RE: [PATCH v3 4/7] ethdev: add meter color mark flow action

[Ori Kam <orika@nvidia.com>]

Hi Alexander,

Small comment, maybe worth saying that the marking is done on a metadata and not on a packet field.

> -----Original Message-----
> From: Alexander Kozyrev <akozyrev@nvidia.com>
> Sent: Wednesday, June 1, 2022 6:44 AM
> To: dev@dpdk.org
> Cc: cristian.dumitrescu@intel.com; jerinjacobk@gmail.com; Ori Kam <orika@nvidia.com>; NBU-
> Contact-Thomas Monjalon (EXTERNAL) <thomas@monjalon.net>; ivan.malov@oktetlabs.ru;
> andrew.rybchenko@oktetlabs.ru; ferruh.yigit@xilinx.com; mohammad.abdul.awal@intel.com;
> qi.z.zhang@intel.com; jerinj@marvell.com; ajit.khaparde@broadcom.com;
> bruce.richardson@intel.com
> Subject: [PATCH v3 4/7] ethdev: add meter color mark flow action
> 
> Create a new Flow API action: METER_MARK.
> It Meters an IP packet stream and marks its packets with colors.
> Unlike the METER action, it performs no policing at all.
> A user has the flexibility to create any policies with the help of
> the METER_COLOR item later, only meter profile is mandatory here.
> 
> Signed-off-by: Alexander Kozyrev <akozyrev@nvidia.com>
> ---
>  doc/guides/prog_guide/rte_flow.rst     | 25 +++++++++++++++++++++++
>  doc/guides/rel_notes/release_22_07.rst |  1 +
>  lib/ethdev/rte_flow.c                  |  1 +
>  lib/ethdev/rte_flow.h                  | 28 ++++++++++++++++++++++++++
>  4 files changed, 55 insertions(+)
> 
> diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
> index 018def1033..90f0ebc9bc 100644
> --- a/doc/guides/prog_guide/rte_flow.rst
> +++ b/doc/guides/prog_guide/rte_flow.rst
> @@ -3411,6 +3411,31 @@ This action is meant to use the same structure as `Action:
> PORT_REPRESENTOR`_.
> 
>  See also `Item: REPRESENTED_PORT`_.
> 
> +Action: ``METER_MARK``
> +^^^^^^^^^^^^^^^^^^^^^^
> +
> +Meters an IP packet stream and marks its packets with colors.
> +
> +Unlike the ``METER`` action, policing is optional and may be
> +performed later with the help of the ``METER_COLOR`` item.
> +The profile and/or policy objects have to be created
> +using the rte_mtr_profile_add()/rte_mtr_policy_add() API.
> +Pointers to these objects are used as action parameters
> +and need to be retrieved using the rte_mtr_profile_get() API
> +and rte_mtr_policy_get() API respectively.
> +
> +.. _table_rte_flow_action_meter_mark:
> +
> +.. table:: METER_MARK
> +
> +   +------------------+----------------------+
> +   | Field            | Value                |
> +   +==================+======================+
> +   | ``profile``      | Meter profile object |
> +   +------------------+----------------------+
> +   | ``policy``       | Meter policy object  |
> +   +------------------+----------------------+
> +
>  Negative types
>  ~~~~~~~~~~~~~~
> 
> diff --git a/doc/guides/rel_notes/release_22_07.rst b/doc/guides/rel_notes/release_22_07.rst
> index 6d030bead5..fca7d07e4b 100644
> --- a/doc/guides/rel_notes/release_22_07.rst
> +++ b/doc/guides/rel_notes/release_22_07.rst
> @@ -74,6 +74,7 @@ New Features
>    * Added METER_COLOR item to match Color Marker set by a Meter.
>    * Added ability to set Color Marker via modify_field Flow API.
>    * Added Meter API to get a pointer to profile/policy by their ID.
> +  * Added METER_MARK action for Metering with lockless profile/policy access.
> 
>  * **Updated Intel iavf driver.**
> 
> diff --git a/lib/ethdev/rte_flow.c b/lib/ethdev/rte_flow.c
> index 07d7e998c0..9049d3bad3 100644
> --- a/lib/ethdev/rte_flow.c
> +++ b/lib/ethdev/rte_flow.c
> @@ -262,6 +262,7 @@ static const struct rte_flow_desc_data rte_flow_desc_action[] = {
>  	MK_FLOW_ACTION(CONNTRACK, sizeof(struct rte_flow_action_conntrack)),
>  	MK_FLOW_ACTION(PORT_REPRESENTOR, sizeof(struct rte_flow_action_ethdev)),
>  	MK_FLOW_ACTION(REPRESENTED_PORT, sizeof(struct rte_flow_action_ethdev)),
> +	MK_FLOW_ACTION(METER_MARK, sizeof(struct rte_flow_action_meter_mark)),
>  };
> 
>  int
> diff --git a/lib/ethdev/rte_flow.h b/lib/ethdev/rte_flow.h
> index 9754f6630a..2dc80ad9ef 100644
> --- a/lib/ethdev/rte_flow.h
> +++ b/lib/ethdev/rte_flow.h
> @@ -2906,6 +2906,15 @@ enum rte_flow_action_type {
>  	 * @see struct rte_flow_action_ethdev
>  	 */
>  	RTE_FLOW_ACTION_TYPE_REPRESENTED_PORT,
> +
> +	/**
> +	 * Traffic metering and marking (MTR).
> +	 * the entity represented by the given ethdev.
> +	 *
> +	 * @see struct rte_flow_action_meter_mark
> +	 * See file rte_mtr.h for MTR profile object configuration.
> +	 */
> +	RTE_FLOW_ACTION_TYPE_METER_MARK,
>  };
> 
>  /**
> @@ -3775,6 +3784,25 @@ struct rte_flow_action_modify_field {
>  	uint32_t width; /**< Number of bits to use from a source field. */
>  };
> 
> +/**
> + * RTE_FLOW_ACTION_TYPE_METER_MARK
> + *
> + * Traffic metering and marking (MTR).
> + *
> + * Meters an IP packet stream and marks its packets either
> + * green, yellow, or red according to the specified profile.
> + * The policy is optional and may be specified for defining
> + * subsequent actions based on a color assigned by MTR.
> + * Alternatively, the METER_COLOR item may be used for this.
> + */
> +struct rte_flow_action_meter_mark {
> +
> +	/**< Profile config retrieved with rte_mtr_profile_get(). */
> +	struct rte_flow_meter_profile *profile;
> +	/**< Policy config retrieved with rte_mtr_policy_get(). */
> +	struct rte_flow_meter_policy *policy;
> +};
> +
>  /* Mbuf dynamic field offset for metadata. */
>  extern int32_t rte_flow_dynf_metadata_offs;
> 
> --
> 2.18.2


Acked-by: Ori Kam <orika@nvidia.com>
Best,
Ori