From: Ophir Munk <ophi...@mellanox.com>
GENEVE is a widely used tunneling protocol in modern Virtualized
Networks. testpmd already supports parsing of several tunneling
protocols including VXLAN, VXLAN-GPE, GRE. This commit adds GENEVE
parsing of inner protocols (IPv4-0x0800, IPv6-0x86dd, Ethernet-0x6558)
based on IETF draft-ietf-nvo3-geneve-09. GENEVE is considered more
flexible than the other protocols. In terms of protocol format GENEVE
header has a variable length options as opposed to other tunneling
protocols which have a fixed header size.
Signed-off-by: Ophir Munk <ophi...@mellanox.com>
---
app/test-pmd/csumonly.c | 70 ++++++++++++++++++++++++++++++++++++++++++-
app/test-pmd/testpmd.h | 1 +
lib/librte_net/meson.build | 3 +-
lib/librte_net/rte_geneve.h | 72 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 144 insertions(+), 2 deletions(-)
create mode 100644 lib/librte_net/rte_geneve.h
diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index 7ece398..eb87b9b 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -43,6 +43,7 @@
#include <rte_flow.h>
#include <rte_gro.h>
#include <rte_gso.h>
+#include <rte_geneve.h>
#include "testpmd.h"
@@ -63,6 +64,7 @@
#endif
uint16_t vxlan_gpe_udp_port = 4790;
+uint16_t geneve_udp_port = RTE_GENEVE_DEFAULT_PORT;
/* structure that caches offload info for the current packet */
struct testpmd_offload_info {
@@ -333,6 +335,64 @@ parse_vxlan_gpe(struct rte_udp_hdr *udp_hdr,
info->l2_len += RTE_ETHER_VXLAN_GPE_HLEN;
}
+/* Fill in outer layers length */
+static void
+update_tunnel_outer(struct testpmd_offload_info *info)
+{
+ info->is_tunnel = 1;
+ info->outer_ethertype = info->ethertype;
+ info->outer_l2_len = info->l2_len;
+ info->outer_l3_len = info->l3_len;
+ info->outer_l4_proto = info->l4_proto;
+}
+
+/* Parse a geneve header */
+static void
+parse_geneve(struct rte_udp_hdr *udp_hdr,
+ struct testpmd_offload_info *info)
+{
+ struct rte_ether_hdr *eth_hdr;
+ struct rte_ipv4_hdr *ipv4_hdr;
+ struct rte_ipv6_hdr *ipv6_hdr;
+ struct rte_geneve_hdr *geneve_hdr;
+ uint16_t geneve_len;
+
+ /* Check udp destination port. */
+ if (udp_hdr->dst_port != _htons(geneve_udp_port))
+ return;
+
+ geneve_hdr = (struct rte_geneve_hdr *)((char *)udp_hdr +
+ sizeof(struct rte_udp_hdr));
+ geneve_len = sizeof(struct rte_geneve_hdr) + geneve_hdr->opt_len * 4;
+ if (!geneve_hdr->proto || geneve_hdr->proto ==
+ _htons(RTE_GENEVE_TYPE_IPV4)) {
+ update_tunnel_outer(info);
+ ipv4_hdr = (struct rte_ipv4_hdr *)((char *)geneve_hdr +
+ geneve_len);
+ parse_ipv4(ipv4_hdr, info);
+ info->ethertype = _htons(RTE_ETHER_TYPE_IPV4);
+ info->l2_len = 0;
+ } else if (geneve_hdr->proto == _htons(RTE_GENEVE_TYPE_IPV6)) {
+ update_tunnel_outer(info);
+ ipv6_hdr = (struct rte_ipv6_hdr *)((char *)geneve_hdr +
+ geneve_len);
+ info->ethertype = _htons(RTE_ETHER_TYPE_IPV6);
+ parse_ipv6(ipv6_hdr, info);
+ info->l2_len = 0;
+
+ } else if (geneve_hdr->proto == _htons(RTE_GENEVE_TYPE_ETH)) {
+ update_tunnel_outer(info);
+ eth_hdr = (struct rte_ether_hdr *)((char *)geneve_hdr +
+ geneve_len);
+ parse_ethernet(eth_hdr, info);
+ } else
+ return;
+
+ info->l2_len +=
+ (sizeof(struct rte_udp_hdr) + sizeof(struct rte_geneve_hdr) +
+ ((struct rte_geneve_hdr *)geneve_hdr)->opt_len * 4);
+}
+
/* Parse a gre header */
static void
parse_gre(struct simple_gre_hdr *gre_hdr, struct testpmd_offload_info *info)
@@ -865,9 +925,17 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
}
parse_vxlan(udp_hdr, &info,
m->packet_type);
- if (info.is_tunnel)
+ if (info.is_tunnel) {
tx_ol_flags |=
PKT_TX_TUNNEL_VXLAN;
+ goto tunnel_update;
+ }
+ parse_geneve(udp_hdr, &info);
+ if (info.is_tunnel) {
+ tx_ol_flags |=
+ PKT_TX_TUNNEL_GENEVE;
+ goto tunnel_update;
+ }
} else if (info.l4_proto == IPPROTO_GRE) {
struct simple_gre_hdr *gre_hdr;
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index a8ae5cc..f405d4e 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -452,6 +452,7 @@ extern struct fwd_lcore **fwd_lcores;
extern struct fwd_stream **fwd_streams;
extern uint16_t vxlan_gpe_udp_port; /**< UDP port of tunnel VXLAN-GPE. */
+extern uint16_t geneve_udp_port; /**< UDP port of tunnel GENEVE. */
extern portid_t nb_peer_eth_addrs; /**< Number of peer ethernet addresses. */
extern struct rte_ether_addr peer_eth_addrs[RTE_MAX_ETHPORTS];
diff --git a/lib/librte_net/meson.build b/lib/librte_net/meson.build
index 24ed825..52d3a97 100644
--- a/lib/librte_net/meson.build
+++ b/lib/librte_net/meson.build
@@ -16,7 +16,8 @@ headers = files('rte_ip.h',
'rte_net_crc.h',
'rte_mpls.h',
'rte_higig.h',
- 'rte_ecpri.h')
+ 'rte_ecpri.h',
+ 'rte_geneve.h')
sources = files('rte_arp.c', 'rte_ether.c', 'rte_net.c', 'rte_net_crc.c')
deps += ['mbuf']
diff --git a/lib/librte_net/rte_geneve.h b/lib/librte_net/rte_geneve.h
new file mode 100644
index 0000000..d50f5b3
--- /dev/null
+++ b/lib/librte_net/rte_geneve.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2020 Mellanox Technologies, Ltd
+ */
+
+#ifndef _RTE_GENEVE_H_
+#define _RTE_GENEVE_H_
+
+/**
+ * @file
+ *
+ * GENEVE-related definitions
+ */
+
+#include <stdint.h>
+
+#include <rte_udp.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** GENEVE default port. */
+#define RTE_GENEVE_DEFAULT_PORT 6081
+
+/**
+ * GENEVE protocol header. (draft-ietf-nvo3-geneve-09)
+ * Contains:
+ * 2-bits version (must be 0).
+ * 6-bits option length in four byte multiples, not including the eight
+ * bytes of the fixed tunnel header.
+ * 1-bit control packet.
+ * 1-bit critical options in packet.
+ * 6-bits reserved
+ * 16-bits Protocol Type. The protocol data unit after the Geneve header
+ * following the EtherType convention. Ethernet itself is represented by
+ * the value 0x6558.
+ * 24-bits Virtual Network Identifier (VNI). Virtual network unique identified.
+ * 8-bits reserved bits (must be 0 on transmission and ignored on receipt).
+ * More-bits (optional) variable length options.
+ */
+__extension__
+struct rte_geneve_hdr {
+#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
+ uint8_t ver:2; /**< Version (2). */
+ uint8_t opt_len:6; /**< Options length (6). */
+ uint8_t oam:1; /**< Control packet (1). */
+ uint8_t critical:1; /**< Critical packet (1). */
+ uint8_t rsvd1:6; /**< Reserved (6). */
+#else
+ uint8_t opt_len:6; /**< Options length (6). */
+ uint8_t ver:2; /**< Version (2). */
+ uint8_t rsvd1:6; /**< Reserved (6). */
+ uint8_t critical:1; /**< Critical packet (1). */
+ uint8_t oam:1; /**< Control packet (1). */
+#endif
+ rte_be16_t proto; /**< Protocol type (16). */
+ uint8_t vni[3]; /**< Virtual network identifier (24). */
+ uint8_t rsvd2; /**< Reserved (8). */
+ uint8_t opts[]; /**<Variable length options. */
+} __rte_packed;
+
+/* GENEVE next protocol types */
+#define RTE_GENEVE_TYPE_IPV4 0x0800 /**< IPv4 Protocol. */
+#define RTE_GENEVE_TYPE_IPV6 0x86dd /**< IPv6 Protocol. */
+#define RTE_GENEVE_TYPE_ETH 0x6558 /**< Ethernet Protocol. */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* RTE_GENEVE_H_ */
--
2.8.4
