[dpdk-dev] [PATCH v2 2/5] ethdev: introduce new tunnel VXLAN-GPE

[Xueming Li <xuemingl@mellanox.com>]

VXLAN-GPE enables VXLAN for all protocols. Protocol link:
https://datatracker.ietf.org/doc/draft-ietf-nvo3-vxlan-gpe/

Signed-off-by: Xueming Li <xuemingl@mellanox.com>
---
 lib/librte_ether/rte_eth_ctrl.h  |  3 ++-
 lib/librte_ether/rte_flow.c      |  1 +
 lib/librte_ether/rte_flow.h      | 27 +++++++++++++++++++++++++++
 lib/librte_mbuf/rte_mbuf.c       |  3 +++
 lib/librte_mbuf/rte_mbuf.h       |  1 +
 lib/librte_mbuf/rte_mbuf_ptype.c |  1 +
 lib/librte_mbuf/rte_mbuf_ptype.h | 13 +++++++++++++
 lib/librte_net/rte_ether.h       | 25 +++++++++++++++++++++++++
 8 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/lib/librte_ether/rte_eth_ctrl.h b/lib/librte_ether/rte_eth_ctrl.h
index 668f59acb..5ea8ae24c 100644
--- a/lib/librte_ether/rte_eth_ctrl.h
+++ b/lib/librte_ether/rte_eth_ctrl.h
@@ -54,7 +54,8 @@ extern "C" {
 #define RTE_ETH_FLOW_VXLAN              19 /**< VXLAN protocol based flow */
 #define RTE_ETH_FLOW_GENEVE             20 /**< GENEVE protocol based flow */
 #define RTE_ETH_FLOW_NVGRE              21 /**< NVGRE protocol based flow */
-#define RTE_ETH_FLOW_MAX                22
+#define RTE_ETH_FLOW_VXLAN_GPE          22 /**< VXLAN-GPE protocol based flow */
+#define RTE_ETH_FLOW_MAX                23
 
 /**
  * Feature filter types
diff --git a/lib/librte_ether/rte_flow.c b/lib/librte_ether/rte_flow.c
index 3d8116ebd..fb710fff7 100644
--- a/lib/librte_ether/rte_flow.c
+++ b/lib/librte_ether/rte_flow.c
@@ -50,6 +50,7 @@ static const struct rte_flow_desc_data rte_flow_desc_item[] = {
 	MK_FLOW_ITEM(TCP, sizeof(struct rte_flow_item_tcp)),
 	MK_FLOW_ITEM(SCTP, sizeof(struct rte_flow_item_sctp)),
 	MK_FLOW_ITEM(VXLAN, sizeof(struct rte_flow_item_vxlan)),
+	MK_FLOW_ITEM(VXLAN_GPE, sizeof(struct rte_flow_item_vxlan_gpe)),
 	MK_FLOW_ITEM(MPLS, sizeof(struct rte_flow_item_mpls)),
 	MK_FLOW_ITEM(GRE, sizeof(struct rte_flow_item_gre)),
 	MK_FLOW_ITEM(E_TAG, sizeof(struct rte_flow_item_e_tag)),
diff --git a/lib/librte_ether/rte_flow.h b/lib/librte_ether/rte_flow.h
index bed727df8..c7cfc201a 100644
--- a/lib/librte_ether/rte_flow.h
+++ b/lib/librte_ether/rte_flow.h
@@ -256,6 +256,13 @@ enum rte_flow_item_type {
 	RTE_FLOW_ITEM_TYPE_VXLAN,
 
 	/**
+	 * Matches a VXLAN-GPE header.
+	 *
+	 * See struct rte_flow_item_vxlan_gpe.
+	 */
+	RTE_FLOW_ITEM_TYPE_VXLAN_GPE,
+
+	/**
 	 * Matches a E_TAG header.
 	 *
 	 * See struct rte_flow_item_e_tag.
@@ -676,6 +683,26 @@ static const struct rte_flow_item_vxlan rte_flow_item_vxlan_mask = {
 #endif
 
 /**
+ * RTE_FLOW_ITEM_TYPE_VXLAN_GPE.
+ *
+ * Matches a VXLAN-GPE header.
+ */
+struct rte_flow_item_vxlan_gpe {
+	uint8_t flags; /**< Normally 0x0c (I and P flag). */
+	uint8_t rsvd0[2]; /**< Reserved, normally 0x0000. */
+	uint8_t protocol; /**< Protocol type. */
+	uint8_t vni[3]; /**< VXLAN identifier. */
+	uint8_t rsvd1; /**< Reserved, normally 0x00. */
+};
+
+/** Default mask for RTE_FLOW_ITEM_TYPE_VXLAN_GPE. */
+#ifndef __cplusplus
+static const struct rte_flow_item_vxlan_gpe rte_flow_item_vxlan_gpe_mask = {
+	.vni = "\xff\xff\xff",
+};
+#endif
+
+/**
  * RTE_FLOW_ITEM_TYPE_E_TAG.
  *
  * Matches a E-tag header.
diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 091d388d3..dc90379e5 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -405,6 +405,7 @@ const char *rte_get_tx_ol_flag_name(uint64_t mask)
 	case PKT_TX_TUNNEL_IPIP: return "PKT_TX_TUNNEL_IPIP";
 	case PKT_TX_TUNNEL_GENEVE: return "PKT_TX_TUNNEL_GENEVE";
 	case PKT_TX_TUNNEL_MPLSINUDP: return "PKT_TX_TUNNEL_MPLSINUDP";
+	case PKT_TX_TUNNEL_VXLAN_GPE: return "PKT_TX_TUNNEL_VXLAN_GPE";
 	case PKT_TX_MACSEC: return "PKT_TX_MACSEC";
 	case PKT_TX_SEC_OFFLOAD: return "PKT_TX_SEC_OFFLOAD";
 	default: return NULL;
@@ -439,6 +440,8 @@ rte_get_tx_ol_flag_list(uint64_t mask, char *buf, size_t buflen)
 		  "PKT_TX_TUNNEL_NONE" },
 		{ PKT_TX_TUNNEL_MPLSINUDP, PKT_TX_TUNNEL_MASK,
 		  "PKT_TX_TUNNEL_NONE" },
+		{ PKT_TX_TUNNEL_VXLAN_GPE, PKT_TX_TUNNEL_MASK,
+		  "PKT_TX_TUNNEL_NONE" },
 		{ PKT_TX_MACSEC, PKT_TX_MACSEC, NULL },
 		{ PKT_TX_SEC_OFFLOAD, PKT_TX_SEC_OFFLOAD, NULL },
 	};
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 62740254d..1839cf2ed 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -210,6 +210,7 @@ extern "C" {
 #define PKT_TX_TUNNEL_GENEVE  (0x4ULL << 45)
 /**< TX packet with MPLS-in-UDP RFC 7510 header. */
 #define PKT_TX_TUNNEL_MPLSINUDP (0x5ULL << 45)
+#define PKT_TX_TUNNEL_VXLAN_GPE (0x6ULL << 45)
 /* add new TX TUNNEL type here */
 #define PKT_TX_TUNNEL_MASK    (0xFULL << 45)
 
diff --git a/lib/librte_mbuf/rte_mbuf_ptype.c b/lib/librte_mbuf/rte_mbuf_ptype.c
index 1feefacc6..49106c7df 100644
--- a/lib/librte_mbuf/rte_mbuf_ptype.c
+++ b/lib/librte_mbuf/rte_mbuf_ptype.c
@@ -65,6 +65,7 @@ const char *rte_get_ptype_tunnel_name(uint32_t ptype)
 	case RTE_PTYPE_TUNNEL_GTPU: return "TUNNEL_GTPU";
 	case RTE_PTYPE_TUNNEL_ESP: return "TUNNEL_ESP";
 	case RTE_PTYPE_TUNNEL_L2TP: return "TUNNEL_L2TP";
+	case RTE_PTYPE_TUNNEL_VXLAN_GPE: return "TUNNEL_VXLAN_GPE";
 	default: return "TUNNEL_UNKNOWN";
 	}
 }
diff --git a/lib/librte_mbuf/rte_mbuf_ptype.h b/lib/librte_mbuf/rte_mbuf_ptype.h
index b9a338110..7caf83312 100644
--- a/lib/librte_mbuf/rte_mbuf_ptype.h
+++ b/lib/librte_mbuf/rte_mbuf_ptype.h
@@ -423,6 +423,19 @@ extern "C" {
  */
 #define RTE_PTYPE_TUNNEL_L2TP               0x0000a000
 /**
+ * VXLAN-GPE (VXLAN Generic Protocol Extension) tunneling packet type.
+ *
+ * Packet format:
+ * <'ether type'=0x0800
+ * | 'version'=4, 'protocol'=17
+ * | 'destination port'=4790>
+ * or,
+ * <'ether type'=0x86DD
+ * | 'version'=6, 'next header'=17
+ * | 'destination port'=4790>
+ */
+#define RTE_PTYPE_TUNNEL_VXLAN_GPE          0x0000b000
+/**
  * Mask of tunneling packet types.
  */
 #define RTE_PTYPE_TUNNEL_MASK               0x0000f000
diff --git a/lib/librte_net/rte_ether.h b/lib/librte_net/rte_ether.h
index a271d1c86..a64814179 100644
--- a/lib/librte_net/rte_ether.h
+++ b/lib/librte_net/rte_ether.h
@@ -311,6 +311,31 @@ struct vxlan_hdr {
 /**< VXLAN tunnel header length. */
 
 /**
+ * VXLAN-GPE protocol header.
+ * Contains the 8-bit flag, 8-bit next-protocol, 24-bit VXLAN Network
+ * Identifier and Reserved fields (16 bits and 8 bits).
+ */
+struct vxlan_gpe_hdr {
+	uint8_t vx_flags; /**< flag (8). */
+	uint8_t reserved[2]; /**< Reserved (16). */
+	uint8_t proto; /**< next-protocol (8). */
+	uint32_t vx_vni;   /**< VNI (24) + Reserved (8). */
+} __attribute__((__packed__));
+
+/* VXLAN-GPE next protocol types */
+#define VXLAN_GPE_TYPE_IPv4 1 /**< IPv4 Protocol. */
+#define VXLAN_GPE_TYPE_IPv6 2 /**< IPv6 Protocol. */
+#define VXLAN_GPE_TYPE_ETH  3 /**< Ethernet Protocol. */
+#define VXLAN_GPE_TYPE_NSH  4 /**< NSH Protocol. */
+#define VXLAN_GPE_TYPE_MPLS 5 /**< MPLS Protocol. */
+#define VXLAN_GPE_TYPE_GBP  6 /**< GBP Protocol. */
+#define VXLAN_GPE_TYPE_VBNG 7 /**< vBNG Protocol. */
+
+#define ETHER_VXLAN_GPE_HLEN (sizeof(struct udp_hdr) + \
+			      sizeof(struct vxlan_gpe_hdr))
+/**< VXLAN-GPE tunnel header length. */
+
+/**
  * Extract VLAN tag information into mbuf
  *
  * Software version of VLAN stripping
-- 
2.13.3