ethdev: add fuzzy match in flow API

[dpdk.git] / lib / librte_ether / rte_flow.h

diff --git a/lib/librte_ether/rte_flow.h b/lib/librte_ether/rte_flow.h
index 057f7e7..cfbed30 100644 (file)
--- a/lib/librte_ether/rte_flow.h
+++ b/lib/librte_ether/rte_flow.h
@@ -297,6 +297,18 @@ enum rte_flow_item_type {
         * See struct rte_flow_item_gre.
         */
        RTE_FLOW_ITEM_TYPE_GRE,
+
+       /**
+        * [META]
+        *
+        * Fuzzy pattern match, expect faster than default.
+        *
+        * This is for device that support fuzzy matching option.
+        * Usually a fuzzy matching is fast but the cost is accuracy.
+        *
+        * See struct rte_flow_item_fuzzy.
+        */
+       RTE_FLOW_ITEM_TYPE_FUZZY,
 };
 
 /**
@@ -694,6 +706,31 @@ static const struct rte_flow_item_gre rte_flow_item_gre_mask = {
 };
 #endif
 
+/**
+ * RTE_FLOW_ITEM_TYPE_FUZZY
+ *
+ * Fuzzy pattern match, expect faster than default.
+ *
+ * This is for device that support fuzzy match option.
+ * Usually a fuzzy match is fast but the cost is accuracy.
+ * i.e. Signature Match only match pattern's hash value, but it is
+ * possible two different patterns have the same hash value.
+ *
+ * Matching accuracy level can be configure by threshold.
+ * Driver can divide the range of threshold and map to different
+ * accuracy levels that device support.
+ */
+struct rte_flow_item_fuzzy {
+       uint32_t thresh; /**< Accuracy threshold*/
+};
+
+/** Default mask for RTE_FLOW_ITEM_TYPE_FUZZY. */
+#ifndef __cplusplus
+static const struct rte_flow_item_fuzzy rte_flow_item_fuzzy_mask = {
+       .thresh = 0xffffffff,
+};
+#endif
+
 /**
  * Matching pattern item definition.
  *