ethdev: add flow action for metering and policing

Metering and policing action typically sits on top of flow classification,
which is why MTR objects are enabled through a newly introduced flow
action.

The configuration of MTR objects is done in their own namespace (rte_mtr)
within the librte_ether library. The MTR object is hooked into ethdev RX
processing path using the "meter" flow action.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>

diff --git a/doc/guides/prog_guide/rte_flow.rst b/doc/guides/prog_guide/rte_flow.rst
index 13e3dbe..bcb438e 100644 (file)
--- a/doc/guides/prog_guide/rte_flow.rst
+++ b/doc/guides/prog_guide/rte_flow.rst
@@ -1371,6 +1371,29 @@ rule or if packets are not addressed to a VF in the first place.
    | ``vf``       | VF ID to redirect packets to   |
    +--------------+--------------------------------+
 
+Action: ``METER``
+^^^^^^^^^^^^^^^^^
+
+Applies a stage of metering and policing.
+
+The metering and policing (MTR) object has to be first created using the
+rte_mtr_create() API function. The ID of the MTR object is specified as
+action parameter. More than one flow can use the same MTR object through
+the meter action. The MTR object can be further updated or queried using
+the rte_mtr* API.
+
+- Non-terminating by default.
+
+.. _table_rte_flow_action_meter:
+
+.. table:: METER
+
+   +--------------+---------------+
+   | Field        | Value         |
+   +==============+===============+
+   | ``mtr_id``   | MTR object ID |
+   +--------------+---------------+
+
 Negative types
 ~~~~~~~~~~~~~~
 

diff --git a/lib/librte_ether/rte_flow.h b/lib/librte_ether/rte_flow.h
index a0ffb71..062e3ac 100644 (file)
--- a/lib/librte_ether/rte_flow.h
+++ b/lib/librte_ether/rte_flow.h
@@ -967,6 +967,14 @@ enum rte_flow_action_type {
         * See struct rte_flow_action_vf.
         */
        RTE_FLOW_ACTION_TYPE_VF,
+
+       /**
+        * Traffic metering and policing (MTR).
+        *
+        * See struct rte_flow_action_meter.
+        * See file rte_mtr.h for MTR object configuration.
+        */
+       RTE_FLOW_ACTION_TYPE_METER,
 };
 
 /**
@@ -1059,6 +1067,20 @@ struct rte_flow_action_vf {
        uint32_t id; /**< VF ID to redirect packets to. */
 };
 
+/**
+ * RTE_FLOW_ACTION_TYPE_METER
+ *
+ * Traffic metering and policing (MTR).
+ *
+ * Packets matched by items of this type can be either dropped or passed to the
+ * next item with their color set by the MTR object.
+ *
+ * Non-terminating by default.
+ */
+struct rte_flow_action_meter {
+       uint32_t mtr_id; /**< MTR object ID created with rte_mtr_create(). */
+};
+
 /**
  * Definition of a single action.
  *