[dpdk-dev] [RFC v3 1/8] lib/librte_ethdev: introduce GENEVE header TLV option item

[Shiri Kuzin <shirik@nvidia.com>]

The Geneve tunneling protocol is designed to allow the
user to specify some data context on the packet.
The GENEVE TLV (Type-Length-Variable) Option
is the mean intended to present the user data.

In order to support GENEVE TLV Option the new rte_flow
item "rte_flow_item_geneve_opt" is added.
The new item contains the values and masks for the
following fields:
-option class
-option type
-length
-data

New item will be added to testpmd to support match and
raw encap/decap actions.

Signed-off-by: Shiri Kuzin <shirik@nvidia.com>
---
 lib/librte_ethdev/rte_flow.c |  1 +
 lib/librte_ethdev/rte_flow.h | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/lib/librte_ethdev/rte_flow.c b/lib/librte_ethdev/rte_flow.c
index a06f64c..2af7d96 100644
--- a/lib/librte_ethdev/rte_flow.c
+++ b/lib/librte_ethdev/rte_flow.c
@@ -97,6 +97,7 @@ struct rte_flow_desc_data {
 	MK_FLOW_ITEM(L2TPV3OIP, sizeof(struct rte_flow_item_l2tpv3oip)),
 	MK_FLOW_ITEM(PFCP, sizeof(struct rte_flow_item_pfcp)),
 	MK_FLOW_ITEM(ECPRI, sizeof(struct rte_flow_item_ecpri)),
+	MK_FLOW_ITEM(GENEVE_OPT, sizeof(struct rte_flow_item_geneve_opt)),
 };
 
 /** Generate flow_action[] entry. */
diff --git a/lib/librte_ethdev/rte_flow.h b/lib/librte_ethdev/rte_flow.h
index 0977a78..e17a630 100644
--- a/lib/librte_ethdev/rte_flow.h
+++ b/lib/librte_ethdev/rte_flow.h
@@ -543,6 +543,14 @@ enum rte_flow_item_type {
 	 * See struct rte_flow_item_ipv6_frag_ext.
 	 */
 	RTE_FLOW_ITEM_TYPE_IPV6_FRAG_EXT,
+
+	/**
+	 * Matches Geneve Variable Length Option
+	 *
+	 * See struct rte_flow_item_geneve_opt
+	 */
+	RTE_FLOW_ITEM_TYPE_GENEVE_OPT,
+
 };
 
 /**
@@ -1626,7 +1634,32 @@ struct rte_flow_item_ecpri {
 	},
 };
 #endif
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
+/**
+ * RTE_FLOW_ITEM_TYPE_GENEVE_OPT
+ *
+ * Matches a GENEVE Variable Length Option
+ */
+RTE_STD_C11
+struct rte_flow_item_geneve_opt {
+	rte_be16_t option_class;
+	uint8_t option_type;
+	uint8_t option_len;
+	uint32_t *data;
+};
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
 
+/** Default mask for RTE_FLOW_ITEM_TYPE_GENEVE_OPT. */
+#ifndef __cplusplus
+static const struct rte_flow_item_geneve_opt
+rte_flow_item_geneve_opt_mask = {
+	.option_type = 0xff,
+};
+#endif
 /**
  * Matching pattern item definition.
  *
-- 
1.8.3.1