Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

7 files changed, 2349 insertions, 0 deletions

diff --git a/examples/tep_termination/Makefile b/examples/tep_termination/Makefile
new file mode 100644
index 00000000..448e6183
--- /dev/null
+++ b/examples/tep_termination/Makefile
@@ -0,0 +1,56 @@
+#   BSD LICENSE
+#
+#   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
+#       from this software without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+ifneq ($(CONFIG_RTE_EXEC_ENV),"linuxapp")
+$(error This application can only operate in a linuxapp environment, \
+please change the definition of the RTE_TARGET environment variable)
+endif
+
+# binary name
+APP = tep_termination
+
+# all source are stored in SRCS-y
+SRCS-y := main.c vxlan_setup.c vxlan.c
+
+CFLAGS += -O3
+CFLAGS += $(WERROR_FLAGS)
+CFLAGS += -D_GNU_SOURCE
+
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/examples/tep_termination/main.c b/examples/tep_termination/main.c
new file mode 100644
index 00000000..f97d552a
--- /dev/null
+++ b/examples/tep_termination/main.c
@@ -0,0 +1,1275 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <arpa/inet.h>
+#include <getopt.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/virtio_net.h>
+#include <linux/virtio_ring.h>
+#include <signal.h>
+#include <stdint.h>
+#include <sys/eventfd.h>
+#include <sys/param.h>
+#include <unistd.h>
+
+#include <rte_atomic.h>
+#include <rte_cycles.h>
+#include <rte_ethdev.h>
+#include <rte_log.h>
+#include <rte_string_fns.h>
+#include <rte_malloc.h>
+#include <rte_virtio_net.h>
+
+#include "main.h"
+#include "vxlan.h"
+#include "vxlan_setup.h"
+
+/* the maximum number of external ports supported */
+#define MAX_SUP_PORTS 1
+
+/**
+ * Calculate the number of buffers needed per port
+ */
+#define NUM_MBUFS_PER_PORT ((MAX_QUEUES * RTE_TEST_RX_DESC_DEFAULT) +\
+				(nb_switching_cores * MAX_PKT_BURST) +\
+				(nb_switching_cores * \
+				RTE_TEST_TX_DESC_DEFAULT) +\
+				(nb_switching_cores * MBUF_CACHE_SIZE))
+
+#define MBUF_CACHE_SIZE 128
+#define MBUF_SIZE (2048 + sizeof(struct rte_mbuf) + RTE_PKTMBUF_HEADROOM)
+
+#define MAX_PKT_BURST 32	/* Max burst size for RX/TX */
+#define BURST_TX_DRAIN_US 100	/* TX drain every ~100us */
+
+/* Defines how long we wait between retries on RX */
+#define BURST_RX_WAIT_US 15
+
+#define BURST_RX_RETRIES 4	/* Number of retries on RX. */
+
+#define JUMBO_FRAME_MAX_SIZE    0x2600
+
+/* State of virtio device. */
+#define DEVICE_MAC_LEARNING 0
+#define DEVICE_RX	    1
+#define DEVICE_SAFE_REMOVE  2
+
+/* Config_core_flag status definitions. */
+#define REQUEST_DEV_REMOVAL 1
+#define ACK_DEV_REMOVAL     0
+
+/* Configurable number of RX/TX ring descriptors */
+#define RTE_TEST_RX_DESC_DEFAULT 1024
+#define RTE_TEST_TX_DESC_DEFAULT 512
+
+/* Get first 4 bytes in mbuf headroom. */
+#define MBUF_HEADROOM_UINT32(mbuf) (*(uint32_t *)((uint8_t *)(mbuf) \
+		+ sizeof(struct rte_mbuf)))
+
+#define INVALID_PORT_ID 0xFF
+
+/* Size of buffers used for snprintfs. */
+#define MAX_PRINT_BUFF 6072
+
+/* Maximum character device basename size. */
+#define MAX_BASENAME_SZ 20
+
+/* Maximum long option length for option parsing. */
+#define MAX_LONG_OPT_SZ 64
+
+/* Used to compare MAC addresses. */
+#define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL
+
+#define CMD_LINE_OPT_NB_DEVICES "nb-devices"
+#define CMD_LINE_OPT_UDP_PORT "udp-port"
+#define CMD_LINE_OPT_TX_CHECKSUM "tx-checksum"
+#define CMD_LINE_OPT_TSO_SEGSZ "tso-segsz"
+#define CMD_LINE_OPT_FILTER_TYPE "filter-type"
+#define CMD_LINE_OPT_ENCAP "encap"
+#define CMD_LINE_OPT_DECAP "decap"
+#define CMD_LINE_OPT_RX_RETRY "rx-retry"
+#define CMD_LINE_OPT_RX_RETRY_DELAY "rx-retry-delay"
+#define CMD_LINE_OPT_RX_RETRY_NUM "rx-retry-num"
+#define CMD_LINE_OPT_STATS "stats"
+#define CMD_LINE_OPT_DEV_BASENAME "dev-basename"
+
+/* mask of enabled ports */
+static uint32_t enabled_port_mask;
+
+/*Number of switching cores enabled*/
+static uint32_t nb_switching_cores;
+
+/* number of devices/queues to support*/
+uint16_t nb_devices = 2;
+
+/* max ring descriptor, ixgbe, i40e, e1000 all are 4096. */
+#define MAX_RING_DESC 4096
+
+struct vpool {
+	struct rte_mempool *pool;
+	struct rte_ring *ring;
+	uint32_t buf_size;
+} vpool_array[MAX_QUEUES+MAX_QUEUES];
+
+/* UDP tunneling port */
+uint16_t udp_port = 4789;
+
+/* enable/disable inner TX checksum */
+uint8_t tx_checksum = 0;
+
+/* TCP segment size */
+uint16_t tso_segsz = 0;
+
+/* enable/disable decapsulation */
+uint8_t rx_decap = 1;
+
+/* enable/disable encapsulation */
+uint8_t tx_encap = 1;
+
+/* RX filter type for tunneling packet */
+uint8_t filter_idx = 1;
+
+/* overlay packet operation */
+struct ol_switch_ops overlay_options = {
+	.port_configure = vxlan_port_init,
+	.tunnel_setup = vxlan_link,
+	.tunnel_destroy = vxlan_unlink,
+	.tx_handle = vxlan_tx_pkts,
+	.rx_handle = vxlan_rx_pkts,
+	.param_handle = NULL,
+};
+
+/* Enable stats. */
+uint32_t enable_stats = 0;
+/* Enable retries on RX. */
+static uint32_t enable_retry = 1;
+/* Specify timeout (in useconds) between retries on RX. */
+static uint32_t burst_rx_delay_time = BURST_RX_WAIT_US;
+/* Specify the number of retries on RX. */
+static uint32_t burst_rx_retry_num = BURST_RX_RETRIES;
+
+/* Character device basename. Can be set by user. */
+static char dev_basename[MAX_BASENAME_SZ] = "vhost-net";
+
+static unsigned lcore_ids[RTE_MAX_LCORE];
+uint8_t ports[RTE_MAX_ETHPORTS];
+
+static unsigned nb_ports; /**< The number of ports specified in command line */
+
+/* ethernet addresses of ports */
+struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
+
+/* heads for the main used and free linked lists for the data path. */
+static struct virtio_net_data_ll *ll_root_used;
+static struct virtio_net_data_ll *ll_root_free;
+
+/**
+ * Array of data core structures containing information on
+ * individual core linked lists.
+ */
+static struct lcore_info lcore_info[RTE_MAX_LCORE];
+
+/* Used for queueing bursts of TX packets. */
+struct mbuf_table {
+	unsigned len;
+	unsigned txq_id;
+	struct rte_mbuf *m_table[MAX_PKT_BURST];
+};
+
+/* TX queue for each data core. */
+struct mbuf_table lcore_tx_queue[RTE_MAX_LCORE];
+
+struct device_statistics dev_statistics[MAX_DEVICES];
+
+/**
+ * Set character device basename.
+ */
+static int
+us_vhost_parse_basename(const char *q_arg)
+{
+	/* parse number string */
+	if (strlen(q_arg) >= MAX_BASENAME_SZ)
+		return -1;
+	else
+		snprintf((char *)&dev_basename, MAX_BASENAME_SZ, "%s", q_arg);
+
+	return 0;
+}
+
+/**
+ * Parse the portmask provided at run time.
+ */
+static int
+parse_portmask(const char *portmask)
+{
+	char *end = NULL;
+	unsigned long pm;
+
+	/* parse hexadecimal string */
+	pm = strtoul(portmask, &end, 16);
+	if ((portmask[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (pm == 0)
+		return -1;
+
+	return pm;
+}
+
+/**
+ * Parse num options at run time.
+ */
+static int
+parse_num_opt(const char *q_arg, uint32_t max_valid_value)
+{
+	char *end = NULL;
+	unsigned long num;
+
+	/* parse unsigned int string */
+	num = strtoul(q_arg, &end, 10);
+	if ((q_arg[0] == '\0') || (end == NULL) || (*end != '\0'))
+		return -1;
+
+	if (num > max_valid_value)
+		return -1;
+
+	return num;
+}
+
+/**
+ * Display usage
+ */
+static void
+tep_termination_usage(const char *prgname)
+{
+	RTE_LOG(INFO, VHOST_CONFIG, "%s [EAL options] -- -p PORTMASK\n"
+	"               --udp-port: UDP destination port for VXLAN packet\n"
+	"		--nb-devices[1-64]: The number of virtIO device\n"
+	"               --tx-checksum [0|1]: inner Tx checksum offload\n"
+	"               --tso-segsz [0-N]: TCP segment size\n"
+	"               --decap [0|1]: tunneling packet decapsulation\n"
+	"               --encap [0|1]: tunneling packet encapsulation\n"
+	"               --filter-type[1-3]: filter type for tunneling packet\n"
+	"                   1: Inner MAC and tenent ID\n"
+	"                   2: Inner MAC and VLAN, and tenent ID\n"
+	"                   3: Outer MAC, Inner MAC and tenent ID\n"
+	"		-p PORTMASK: Set mask for ports to be used by application\n"
+	"		--rx-retry [0|1]: disable/enable(default) retries on rx."
+	"		 Enable retry if destintation queue is full\n"
+	"		--rx-retry-delay [0-N]: timeout(in usecond) between retries on RX."
+	"		 This makes effect only if retries on rx enabled\n"
+	"		--rx-retry-num [0-N]: the number of retries on rx."
+	"		 This makes effect only if retries on rx enabled\n"
+	"		--stats [0-N]: 0: Disable stats, N: Time in seconds to print stats\n"
+	"		--dev-basename: The basename to be used for the character device.\n",
+	       prgname);
+}
+
+/**
+ * Parse the arguments given in the command line of the application.
+ */
+static int
+tep_termination_parse_args(int argc, char **argv)
+{
+	int opt, ret;
+	int option_index;
+	unsigned i;
+	const char *prgname = argv[0];
+	static struct option long_option[] = {
+		{CMD_LINE_OPT_NB_DEVICES, required_argument, NULL, 0},
+		{CMD_LINE_OPT_UDP_PORT, required_argument, NULL, 0},
+		{CMD_LINE_OPT_TX_CHECKSUM, required_argument, NULL, 0},
+		{CMD_LINE_OPT_TSO_SEGSZ, required_argument, NULL, 0},
+		{CMD_LINE_OPT_DECAP, required_argument, NULL, 0},
+		{CMD_LINE_OPT_ENCAP, required_argument, NULL, 0},
+		{CMD_LINE_OPT_FILTER_TYPE, required_argument, NULL, 0},
+		{CMD_LINE_OPT_RX_RETRY, required_argument, NULL, 0},
+		{CMD_LINE_OPT_RX_RETRY_DELAY, required_argument, NULL, 0},
+		{CMD_LINE_OPT_RX_RETRY_NUM, required_argument, NULL, 0},
+		{CMD_LINE_OPT_STATS, required_argument, NULL, 0},
+		{CMD_LINE_OPT_DEV_BASENAME, required_argument, NULL, 0},
+		{NULL, 0, 0, 0},
+	};
+
+	/* Parse command line */
+	while ((opt = getopt_long(argc, argv, "p:",
+			long_option, &option_index)) != EOF) {
+		switch (opt) {
+		/* Portmask */
+		case 'p':
+			enabled_port_mask = parse_portmask(optarg);
+			if (enabled_port_mask == 0) {
+				RTE_LOG(INFO, VHOST_CONFIG,
+					"Invalid portmask\n");
+				tep_termination_usage(prgname);
+				return -1;
+			}
+			break;
+		case 0:
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_NB_DEVICES,
+				sizeof(CMD_LINE_OPT_NB_DEVICES))) {
+				ret = parse_num_opt(optarg, MAX_DEVICES);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+					"Invalid argument for nb-devices [0-%d]\n",
+					MAX_DEVICES);
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					nb_devices = ret;
+			}
+
+			/* Enable/disable retries on RX. */
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_RX_RETRY,
+				sizeof(CMD_LINE_OPT_RX_RETRY))) {
+				ret = parse_num_opt(optarg, 1);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for rx-retry [0|1]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					enable_retry = ret;
+			}
+
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_TSO_SEGSZ,
+				sizeof(CMD_LINE_OPT_TSO_SEGSZ))) {
+				ret = parse_num_opt(optarg, INT16_MAX);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for TCP segment size [0-N]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					tso_segsz = ret;
+			}
+
+			if (!strncmp(long_option[option_index].name,
+					CMD_LINE_OPT_UDP_PORT,
+					sizeof(CMD_LINE_OPT_UDP_PORT))) {
+				ret = parse_num_opt(optarg, INT16_MAX);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for UDP port [0-N]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					udp_port = ret;
+			}
+
+			/* Specify the retries delay time (in useconds) on RX.*/
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_RX_RETRY_DELAY,
+				sizeof(CMD_LINE_OPT_RX_RETRY_DELAY))) {
+				ret = parse_num_opt(optarg, INT32_MAX);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for rx-retry-delay [0-N]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					burst_rx_delay_time = ret;
+			}
+
+			/* Specify the retries number on RX. */
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_RX_RETRY_NUM,
+				sizeof(CMD_LINE_OPT_RX_RETRY_NUM))) {
+				ret = parse_num_opt(optarg, INT32_MAX);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for rx-retry-num [0-N]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					burst_rx_retry_num = ret;
+			}
+
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_TX_CHECKSUM,
+				sizeof(CMD_LINE_OPT_TX_CHECKSUM))) {
+				ret = parse_num_opt(optarg, 1);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for tx-checksum [0|1]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					tx_checksum = ret;
+			}
+
+			if (!strncmp(long_option[option_index].name,
+					CMD_LINE_OPT_FILTER_TYPE,
+					sizeof(CMD_LINE_OPT_FILTER_TYPE))) {
+				ret = parse_num_opt(optarg, 3);
+				if ((ret == -1) || (ret == 0)) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for filter type [1-3]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					filter_idx = ret - 1;
+			}
+
+			/* Enable/disable encapsulation on RX. */
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_DECAP,
+				sizeof(CMD_LINE_OPT_DECAP))) {
+				ret = parse_num_opt(optarg, 1);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for decap [0|1]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					rx_decap = ret;
+			}
+
+			/* Enable/disable encapsulation on TX. */
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_ENCAP,
+				sizeof(CMD_LINE_OPT_ENCAP))) {
+				ret = parse_num_opt(optarg, 1);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for encap [0|1]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					tx_encap = ret;
+			}
+
+			/* Enable/disable stats. */
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_STATS,
+				sizeof(CMD_LINE_OPT_STATS))) {
+				ret = parse_num_opt(optarg, INT32_MAX);
+				if (ret == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+							"Invalid argument for stats [0..N]\n");
+					tep_termination_usage(prgname);
+					return -1;
+				} else
+					enable_stats = ret;
+			}
+
+			/* Set character device basename. */
+			if (!strncmp(long_option[option_index].name,
+				CMD_LINE_OPT_DEV_BASENAME,
+				sizeof(CMD_LINE_OPT_DEV_BASENAME))) {
+				if (us_vhost_parse_basename(optarg) == -1) {
+					RTE_LOG(INFO, VHOST_CONFIG,
+						"Invalid argument for character "
+						"device basename (Max %d characters)\n",
+						MAX_BASENAME_SZ);
+					tep_termination_usage(prgname);
+					return -1;
+				}
+			}
+
+			break;
+
+			/* Invalid option - print options. */
+		default:
+			tep_termination_usage(prgname);
+			return -1;
+		}
+	}
+
+	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
+		if (enabled_port_mask & (1 << i))
+			ports[nb_ports++] = (uint8_t)i;
+	}
+
+	if ((nb_ports ==  0) || (nb_ports > MAX_SUP_PORTS)) {
+		RTE_LOG(INFO, VHOST_PORT, "Current enabled port number is %u,"
+			"but only %u port can be enabled\n", nb_ports,
+			MAX_SUP_PORTS);
+		return -1;
+	}
+
+	return 0;
+}
+
+/**
+ * Update the global var NB_PORTS and array PORTS
+ * according to system ports number and return valid ports number
+ */
+static unsigned
+check_ports_num(unsigned max_nb_ports)
+{
+	unsigned valid_nb_ports = nb_ports;
+	unsigned portid;
+
+	if (nb_ports > max_nb_ports) {
+		RTE_LOG(INFO, VHOST_PORT, "\nSpecified port number(%u) "
+			" exceeds total system port number(%u)\n",
+			nb_ports, max_nb_ports);
+		nb_ports = max_nb_ports;
+	}
+
+	for (portid = 0; portid < nb_ports; portid++) {
+		if (ports[portid] >= max_nb_ports) {
+			RTE_LOG(INFO, VHOST_PORT,
+				"\nSpecified port ID(%u) exceeds max "
+				" system port ID(%u)\n",
+				ports[portid], (max_nb_ports - 1));
+			ports[portid] = INVALID_PORT_ID;
+			valid_nb_ports--;
+		}
+	}
+	return valid_nb_ports;
+}
+
+/**
+ * This function routes the TX packet to the correct interface. This may be a local device
+ * or the physical port.
+ */
+static inline void __attribute__((always_inline))
+virtio_tx_route(struct vhost_dev *vdev, struct rte_mbuf *m)
+{
+	struct mbuf_table *tx_q;
+	struct rte_mbuf **m_table;
+	unsigned len, ret = 0;
+	const uint16_t lcore_id = rte_lcore_id();
+	struct virtio_net *dev = vdev->dev;
+
+	LOG_DEBUG(VHOST_DATA, "(%"PRIu64") TX: MAC address is external\n",
+		dev->device_fh);
+
+	/* Add packet to the port tx queue */
+	tx_q = &lcore_tx_queue[lcore_id];
+	len = tx_q->len;
+
+	tx_q->m_table[len] = m;
+	len++;
+	if (enable_stats) {
+		dev_statistics[dev->device_fh].tx_total++;
+		dev_statistics[dev->device_fh].tx++;
+	}
+
+	if (unlikely(len == MAX_PKT_BURST)) {
+		m_table = (struct rte_mbuf **)tx_q->m_table;
+		ret = overlay_options.tx_handle(ports[0],
+			(uint16_t)tx_q->txq_id, m_table,
+			(uint16_t)tx_q->len);
+
+		/* Free any buffers not handled by TX and update
+		 * the port stats.
+		 */
+		if (unlikely(ret < len)) {
+			do {
+				rte_pktmbuf_free(m_table[ret]);
+			} while (++ret < len);
+		}
+
+		len = 0;
+	}
+
+	tx_q->len = len;
+	return;
+}
+
+/**
+ * This function is called by each data core. It handles all
+ * RX/TX registered with the core. For TX the specific lcore
+ * linked list is used. For RX, MAC addresses are compared
+ * with all devices in the main linked list.
+ */
+static int
+switch_worker(__rte_unused void *arg)
+{
+	struct rte_mempool *mbuf_pool = arg;
+	struct virtio_net *dev = NULL;
+	struct vhost_dev *vdev = NULL;
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct virtio_net_data_ll *dev_ll;
+	struct mbuf_table *tx_q;
+	volatile struct lcore_ll_info *lcore_ll;
+	const uint64_t drain_tsc = (rte_get_tsc_hz() + US_PER_S - 1)
+					/ US_PER_S * BURST_TX_DRAIN_US;
+	uint64_t prev_tsc, diff_tsc, cur_tsc, ret_count = 0;
+	unsigned i, ret = 0;
+	const uint16_t lcore_id = rte_lcore_id();
+	const uint16_t num_cores = (uint16_t)rte_lcore_count();
+	uint16_t rx_count = 0;
+	uint16_t tx_count;
+	uint32_t retry = 0;
+
+	RTE_LOG(INFO, VHOST_DATA, "Procesing on Core %u started\n", lcore_id);
+	lcore_ll = lcore_info[lcore_id].lcore_ll;
+	prev_tsc = 0;
+
+	tx_q = &lcore_tx_queue[lcore_id];
+	for (i = 0; i < num_cores; i++) {
+		if (lcore_ids[i] == lcore_id) {
+			tx_q->txq_id = i;
+			break;
+		}
+	}
+
+	while (1) {
+		cur_tsc = rte_rdtsc();
+		/*
+		 * TX burst queue drain
+		 */
+		diff_tsc = cur_tsc - prev_tsc;
+		if (unlikely(diff_tsc > drain_tsc)) {
+
+			if (tx_q->len) {
+				LOG_DEBUG(VHOST_DATA, "TX queue drained after "
+					"timeout with burst size %u\n",
+					tx_q->len);
+				ret = overlay_options.tx_handle(ports[0],
+					(uint16_t)tx_q->txq_id,
+					(struct rte_mbuf **)tx_q->m_table,
+					(uint16_t)tx_q->len);
+				if (unlikely(ret < tx_q->len)) {
+					do {
+						rte_pktmbuf_free(tx_q->m_table[ret]);
+					} while (++ret < tx_q->len);
+				}
+
+				tx_q->len = 0;
+			}
+
+			prev_tsc = cur_tsc;
+
+		}
+
+		rte_prefetch0(lcore_ll->ll_root_used);
+
+		/**
+		 * Inform the configuration core that we have exited
+		 * the linked list and that no devices are
+		 * in use if requested.
+		 */
+		if (lcore_ll->dev_removal_flag == REQUEST_DEV_REMOVAL)
+			lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
+
+		/*
+		 * Process devices
+		 */
+		dev_ll = lcore_ll->ll_root_used;
+
+		while (dev_ll != NULL) {
+			vdev = dev_ll->vdev;
+			dev = vdev->dev;
+
+			if (unlikely(vdev->remove)) {
+				dev_ll = dev_ll->next;
+				overlay_options.tunnel_destroy(vdev);
+				vdev->ready = DEVICE_SAFE_REMOVE;
+				continue;
+			}
+			if (likely(vdev->ready == DEVICE_RX)) {
+				/* Handle guest RX */
+				rx_count = rte_eth_rx_burst(ports[0],
+					vdev->rx_q, pkts_burst, MAX_PKT_BURST);
+
+				if (rx_count) {
+					/*
+					* Retry is enabled and the queue is
+					* full then we wait and retry to
+					* avoid packet loss. Here MAX_PKT_BURST
+					* must be less than virtio queue size
+					*/
+					if (enable_retry && unlikely(rx_count >
+						rte_vring_available_entries(dev, VIRTIO_RXQ))) {
+						for (retry = 0; retry < burst_rx_retry_num;
+							retry++) {
+							rte_delay_us(burst_rx_delay_time);
+							if (rx_count <= rte_vring_available_entries(dev, VIRTIO_RXQ))
+								break;
+						}
+					}
+
+					ret_count = overlay_options.rx_handle(dev, pkts_burst, rx_count);
+					if (enable_stats) {
+						rte_atomic64_add(
+						&dev_statistics[dev->device_fh].rx_total_atomic,
+						rx_count);
+						rte_atomic64_add(
+						&dev_statistics[dev->device_fh].rx_atomic, ret_count);
+					}
+					while (likely(rx_count)) {
+						rx_count--;
+						rte_pktmbuf_free(pkts_burst[rx_count]);
+					}
+
+				}
+			}
+
+			if (likely(!vdev->remove)) {
+				/* Handle guest TX*/
+				tx_count = rte_vhost_dequeue_burst(dev,
+						VIRTIO_TXQ, mbuf_pool,
+						pkts_burst, MAX_PKT_BURST);
+				/* If this is the first received packet we need to learn the MAC */
+				if (unlikely(vdev->ready == DEVICE_MAC_LEARNING) && tx_count) {
+					if (vdev->remove ||
+						(overlay_options.tunnel_setup(vdev, pkts_burst[0]) == -1)) {
+						while (tx_count)
+							rte_pktmbuf_free(pkts_burst[--tx_count]);
+					}
+				}
+				while (tx_count)
+					virtio_tx_route(vdev, pkts_burst[--tx_count]);
+			}
+
+			/* move to the next device in the list */
+			dev_ll = dev_ll->next;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * Add an entry to a used linked list. A free entry must first be found
+ * in the free linked list using get_data_ll_free_entry();
+ */
+static void
+add_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
+	struct virtio_net_data_ll *ll_dev)
+{
+	struct virtio_net_data_ll *ll = *ll_root_addr;
+
+	/* Set next as NULL and use a compiler barrier to avoid reordering. */
+	ll_dev->next = NULL;
+	rte_compiler_barrier();
+
+	/* If ll == NULL then this is the first device. */
+	if (ll) {
+		/* Increment to the tail of the linked list. */
+		while (ll->next != NULL)
+			ll = ll->next;
+
+		ll->next = ll_dev;
+	} else {
+		*ll_root_addr = ll_dev;
+	}
+}
+
+/**
+ * Remove an entry from a used linked list. The entry must then be added to
+ * the free linked list using put_data_ll_free_entry().
+ */
+static void
+rm_data_ll_entry(struct virtio_net_data_ll **ll_root_addr,
+	struct virtio_net_data_ll *ll_dev,
+	struct virtio_net_data_ll *ll_dev_last)
+{
+	struct virtio_net_data_ll *ll = *ll_root_addr;
+
+	if (unlikely((ll == NULL) || (ll_dev == NULL)))
+		return;
+
+	if (ll_dev == ll)
+		*ll_root_addr = ll_dev->next;
+	else
+		if (likely(ll_dev_last != NULL))
+			ll_dev_last->next = ll_dev->next;
+		else
+			RTE_LOG(ERR, VHOST_CONFIG,
+				"Remove entry form ll failed.\n");
+}
+
+/**
+ * Find and return an entry from the free linked list.
+ */
+static struct virtio_net_data_ll *
+get_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr)
+{
+	struct virtio_net_data_ll *ll_free = *ll_root_addr;
+	struct virtio_net_data_ll *ll_dev;
+
+	if (ll_free == NULL)
+		return NULL;
+
+	ll_dev = ll_free;
+	*ll_root_addr = ll_free->next;
+
+	return ll_dev;
+}
+
+/**
+ * Place an entry back on to the free linked list.
+ */
+static void
+put_data_ll_free_entry(struct virtio_net_data_ll **ll_root_addr,
+	struct virtio_net_data_ll *ll_dev)
+{
+	struct virtio_net_data_ll *ll_free = *ll_root_addr;
+
+	if (ll_dev == NULL)
+		return;
+
+	ll_dev->next = ll_free;
+	*ll_root_addr = ll_dev;
+}
+
+/**
+ * Creates a linked list of a given size.
+ */
+static struct virtio_net_data_ll *
+alloc_data_ll(uint32_t size)
+{
+	struct virtio_net_data_ll *ll_new;
+	uint32_t i;
+
+	/* Malloc and then chain the linked list. */
+	ll_new = malloc(size * sizeof(struct virtio_net_data_ll));
+	if (ll_new == NULL) {
+		RTE_LOG(ERR, VHOST_CONFIG,
+			"Failed to allocate memory for ll_new.\n");
+		return NULL;
+	}
+
+	for (i = 0; i < size - 1; i++) {
+		ll_new[i].vdev = NULL;
+		ll_new[i].next = &ll_new[i+1];
+	}
+	ll_new[i].next = NULL;
+
+	return ll_new;
+}
+
+/**
+ * Create the main linked list along with each individual cores
+ * linked list. A used and a free list are created to manage entries.
+ */
+static int
+init_data_ll(void)
+{
+	int lcore;
+
+	RTE_LCORE_FOREACH_SLAVE(lcore) {
+		lcore_info[lcore].lcore_ll =
+			malloc(sizeof(struct lcore_ll_info));
+		if (lcore_info[lcore].lcore_ll == NULL) {
+			RTE_LOG(ERR, VHOST_CONFIG,
+				"Failed to allocate memory for lcore_ll.\n");
+			return -1;
+		}
+
+		lcore_info[lcore].lcore_ll->device_num = 0;
+		lcore_info[lcore].lcore_ll->dev_removal_flag = ACK_DEV_REMOVAL;
+		lcore_info[lcore].lcore_ll->ll_root_used = NULL;
+		if (nb_devices % nb_switching_cores)
+			lcore_info[lcore].lcore_ll->ll_root_free =
+				alloc_data_ll((nb_devices / nb_switching_cores)
+						+ 1);
+		else
+			lcore_info[lcore].lcore_ll->ll_root_free =
+				alloc_data_ll(nb_devices / nb_switching_cores);
+	}
+
+	/* Allocate devices up to a maximum of MAX_DEVICES. */
+	ll_root_free = alloc_data_ll(MIN((nb_devices), MAX_DEVICES));
+
+	return 0;
+}
+
+/**
+ * Remove a device from the specific data core linked list and
+ * from the main linked list. Synchonization occurs through the use
+ * of the lcore dev_removal_flag. Device is made volatile here
+ * to avoid re-ordering of dev->remove=1 which can cause an infinite
+ * loop in the rte_pause loop.
+ */
+static void
+destroy_device(volatile struct virtio_net *dev)
+{
+	struct virtio_net_data_ll *ll_lcore_dev_cur;
+	struct virtio_net_data_ll *ll_main_dev_cur;
+	struct virtio_net_data_ll *ll_lcore_dev_last = NULL;
+	struct virtio_net_data_ll *ll_main_dev_last = NULL;
+	struct vhost_dev *vdev;
+	int lcore;
+
+	dev->flags &= ~VIRTIO_DEV_RUNNING;
+
+	vdev = (struct vhost_dev *)dev->priv;
+
+	/* set the remove flag. */
+	vdev->remove = 1;
+	while (vdev->ready != DEVICE_SAFE_REMOVE)
+		rte_pause();
+
+	/* Search for entry to be removed from lcore ll */
+	ll_lcore_dev_cur = lcore_info[vdev->coreid].lcore_ll->ll_root_used;
+	while (ll_lcore_dev_cur != NULL) {
+		if (ll_lcore_dev_cur->vdev == vdev) {
+			break;
+		} else {
+			ll_lcore_dev_last = ll_lcore_dev_cur;
+			ll_lcore_dev_cur = ll_lcore_dev_cur->next;
+		}
+	}
+
+	if (ll_lcore_dev_cur == NULL) {
+		RTE_LOG(ERR, VHOST_CONFIG,
+			"(%"PRIu64") Failed to find the dev to be destroy.\n",
+			dev->device_fh);
+		return;
+	}
+
+	/* Search for entry to be removed from main ll */
+	ll_main_dev_cur = ll_root_used;
+	ll_main_dev_last = NULL;
+	while (ll_main_dev_cur != NULL) {
+		if (ll_main_dev_cur->vdev == vdev) {
+			break;
+		} else {
+			ll_main_dev_last = ll_main_dev_cur;
+			ll_main_dev_cur = ll_main_dev_cur->next;
+		}
+	}
+
+	/* Remove entries from the lcore and main ll. */
+	rm_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
+			ll_lcore_dev_cur, ll_lcore_dev_last);
+	rm_data_ll_entry(&ll_root_used, ll_main_dev_cur, ll_main_dev_last);
+
+	/* Set the dev_removal_flag on each lcore. */
+	RTE_LCORE_FOREACH_SLAVE(lcore) {
+		lcore_info[lcore].lcore_ll->dev_removal_flag =
+			REQUEST_DEV_REMOVAL;
+	}
+
+	/*
+	 * Once each core has set the dev_removal_flag to
+	 * ACK_DEV_REMOVAL we can be sure that they can no longer access
+	 * the device removed from the linked lists and that the devices
+	 * are no longer in use.
+	 */
+	RTE_LCORE_FOREACH_SLAVE(lcore) {
+		while (lcore_info[lcore].lcore_ll->dev_removal_flag
+			!= ACK_DEV_REMOVAL)
+			rte_pause();
+	}
+
+	/* Add the entries back to the lcore and main free ll.*/
+	put_data_ll_free_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_free,
+				ll_lcore_dev_cur);
+	put_data_ll_free_entry(&ll_root_free, ll_main_dev_cur);
+
+	/* Decrement number of device on the lcore. */
+	lcore_info[vdev->coreid].lcore_ll->device_num--;
+
+	RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been removed "
+		"from data core\n", dev->device_fh);
+
+	rte_free(vdev);
+
+}
+
+/**
+ * A new device is added to a data core. First the device is added
+ * to the main linked list and the allocated to a specific data core.
+ */
+static int
+new_device(struct virtio_net *dev)
+{
+	struct virtio_net_data_ll *ll_dev;
+	int lcore, core_add = 0;
+	uint32_t device_num_min = nb_devices;
+	struct vhost_dev *vdev;
+
+	vdev = rte_zmalloc("vhost device", sizeof(*vdev), RTE_CACHE_LINE_SIZE);
+	if (vdev == NULL) {
+		RTE_LOG(INFO, VHOST_DATA,
+			"(%"PRIu64") Couldn't allocate memory for vhost dev\n",
+			dev->device_fh);
+		return -1;
+	}
+	vdev->dev = dev;
+	dev->priv = vdev;
+	/* Add device to main ll */
+	ll_dev = get_data_ll_free_entry(&ll_root_free);
+	if (ll_dev == NULL) {
+		RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") No free entry found in"
+			" linked list Device limit of %d devices per core"
+			" has been reached\n", dev->device_fh, nb_devices);
+		if (vdev->regions_hpa)
+			rte_free(vdev->regions_hpa);
+		rte_free(vdev);
+		return -1;
+	}
+	ll_dev->vdev = vdev;
+	add_data_ll_entry(&ll_root_used, ll_dev);
+	vdev->rx_q = dev->device_fh;
+
+	/* reset ready flag */
+	vdev->ready = DEVICE_MAC_LEARNING;
+	vdev->remove = 0;
+
+	/* Find a suitable lcore to add the device. */
+	RTE_LCORE_FOREACH_SLAVE(lcore) {
+		if (lcore_info[lcore].lcore_ll->device_num < device_num_min) {
+			device_num_min = lcore_info[lcore].lcore_ll->device_num;
+			core_add = lcore;
+		}
+	}
+	/* Add device to lcore ll */
+	ll_dev = get_data_ll_free_entry(&lcore_info[core_add].lcore_ll->ll_root_free);
+	if (ll_dev == NULL) {
+		RTE_LOG(INFO, VHOST_DATA,
+			"(%"PRIu64") Failed to add device to data core\n",
+			dev->device_fh);
+		vdev->ready = DEVICE_SAFE_REMOVE;
+		destroy_device(dev);
+		rte_free(vdev->regions_hpa);
+		rte_free(vdev);
+		return -1;
+	}
+	ll_dev->vdev = vdev;
+	vdev->coreid = core_add;
+
+	add_data_ll_entry(&lcore_info[vdev->coreid].lcore_ll->ll_root_used,
+			ll_dev);
+
+	/* Initialize device stats */
+	memset(&dev_statistics[dev->device_fh], 0,
+		sizeof(struct device_statistics));
+
+	/* Disable notifications. */
+	rte_vhost_enable_guest_notification(dev, VIRTIO_RXQ, 0);
+	rte_vhost_enable_guest_notification(dev, VIRTIO_TXQ, 0);
+	lcore_info[vdev->coreid].lcore_ll->device_num++;
+	dev->flags |= VIRTIO_DEV_RUNNING;
+
+	RTE_LOG(INFO, VHOST_DATA, "(%"PRIu64") Device has been added to data core %d\n",
+		dev->device_fh, vdev->coreid);
+
+	return 0;
+}
+
+/**
+ * These callback allow devices to be added to the data core when configuration
+ * has been fully complete.
+ */
+static const struct virtio_net_device_ops virtio_net_device_ops = {
+	.new_device =  new_device,
+	.destroy_device = destroy_device,
+};
+
+/**
+ * This is a thread will wake up after a period to print stats if the user has
+ * enabled them.
+ */
+static void
+print_stats(void)
+{
+	struct virtio_net_data_ll *dev_ll;
+	uint64_t tx_dropped, rx_dropped;
+	uint64_t tx, tx_total, rx, rx_total, rx_ip_csum, rx_l4_csum;
+	uint32_t device_fh;
+	const char clr[] = { 27, '[', '2', 'J', '\0' };
+	const char top_left[] = { 27, '[', '1', ';', '1', 'H', '\0' };
+
+	while (1) {
+		sleep(enable_stats);
+
+		/* Clear screen and move to top left */
+		printf("%s%s", clr, top_left);
+
+		printf("\nDevice statistics ================================");
+
+		dev_ll = ll_root_used;
+		while (dev_ll != NULL) {
+			device_fh = (uint32_t)dev_ll->vdev->dev->device_fh;
+			tx_total = dev_statistics[device_fh].tx_total;
+			tx = dev_statistics[device_fh].tx;
+			tx_dropped = tx_total - tx;
+
+			rx_total = rte_atomic64_read(
+				&dev_statistics[device_fh].rx_total_atomic);
+			rx = rte_atomic64_read(
+				&dev_statistics[device_fh].rx_atomic);
+			rx_dropped = rx_total - rx;
+			rx_ip_csum = rte_atomic64_read(
+				&dev_statistics[device_fh].rx_bad_ip_csum);
+			rx_l4_csum = rte_atomic64_read(
+				&dev_statistics[device_fh].rx_bad_l4_csum);
+
+			printf("\nStatistics for device %"PRIu32" ----------"
+					"\nTX total:		%"PRIu64""
+					"\nTX dropped:		%"PRIu64""
+					"\nTX successful:		%"PRIu64""
+					"\nRX total:		%"PRIu64""
+					"\nRX bad IP csum:      %"PRIu64""
+					"\nRX bad L4 csum:      %"PRIu64""
+					"\nRX dropped:		%"PRIu64""
+					"\nRX successful:		%"PRIu64"",
+					device_fh,
+					tx_total,
+					tx_dropped,
+					tx,
+					rx_total,
+					rx_ip_csum,
+					rx_l4_csum,
+					rx_dropped,
+					rx);
+
+			dev_ll = dev_ll->next;
+		}
+		printf("\n================================================\n");
+	}
+}
+
+/**
+ * Main function, does initialisation and calls the per-lcore functions. The CUSE
+ * device is also registered here to handle the IOCTLs.
+ */
+int
+main(int argc, char *argv[])
+{
+	struct rte_mempool *mbuf_pool = NULL;
+	unsigned lcore_id, core_id = 0;
+	unsigned nb_ports, valid_nb_ports;
+	int ret;
+	uint8_t portid;
+	uint16_t queue_id;
+	static pthread_t tid;
+	char thread_name[RTE_MAX_THREAD_NAME_LEN];
+
+	/* init EAL */
+	ret = rte_eal_init(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
+	argc -= ret;
+	argv += ret;
+
+	/* parse app arguments */
+	ret = tep_termination_parse_args(argc, argv);
+	if (ret < 0)
+		rte_exit(EXIT_FAILURE, "Invalid argument\n");
+
+	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++)
+		if (rte_lcore_is_enabled(lcore_id))
+			lcore_ids[core_id++] = lcore_id;
+
+	/* set the number of swithcing cores available */
+	nb_switching_cores = rte_lcore_count()-1;
+
+	/* Get the number of physical ports. */
+	nb_ports = rte_eth_dev_count();
+	if (nb_ports > RTE_MAX_ETHPORTS)
+		nb_ports = RTE_MAX_ETHPORTS;
+
+	/*
+	 * Update the global var NB_PORTS and global array PORTS
+	 * and get value of var VALID_NB_PORTS according to system ports number
+	 */
+	valid_nb_ports = check_ports_num(nb_ports);
+
+	if ((valid_nb_ports == 0) || (valid_nb_ports > MAX_SUP_PORTS)) {
+		rte_exit(EXIT_FAILURE, "Current enabled port number is %u,"
+			"but only %u port can be enabled\n", nb_ports,
+			MAX_SUP_PORTS);
+	}
+	/* Create the mbuf pool. */
+	mbuf_pool = rte_mempool_create(
+			"MBUF_POOL",
+			NUM_MBUFS_PER_PORT
+			* valid_nb_ports,
+			MBUF_SIZE, MBUF_CACHE_SIZE,
+			sizeof(struct rte_pktmbuf_pool_private),
+			rte_pktmbuf_pool_init, NULL,
+			rte_pktmbuf_init, NULL,
+			rte_socket_id(), 0);
+	if (mbuf_pool == NULL)
+		rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
+
+	for (queue_id = 0; queue_id < MAX_QUEUES + 1; queue_id++)
+		vpool_array[queue_id].pool = mbuf_pool;
+
+	/* Set log level. */
+	rte_set_log_level(LOG_LEVEL);
+
+	/* initialize all ports */
+	for (portid = 0; portid < nb_ports; portid++) {
+		/* skip ports that are not enabled */
+		if ((enabled_port_mask & (1 << portid)) == 0) {
+			RTE_LOG(INFO, VHOST_PORT,
+				"Skipping disabled port %d\n", portid);
+			continue;
+		}
+		if (overlay_options.port_configure(portid, mbuf_pool) != 0)
+			rte_exit(EXIT_FAILURE,
+				"Cannot initialize network ports\n");
+	}
+
+	/* Initialise all linked lists. */
+	if (init_data_ll() == -1)
+		rte_exit(EXIT_FAILURE, "Failed to initialize linked list\n");
+
+	/* Initialize device stats */
+	memset(&dev_statistics, 0, sizeof(dev_statistics));
+
+	/* Enable stats if the user option is set. */
+	if (enable_stats) {
+		ret = pthread_create(&tid, NULL, (void *)print_stats, NULL);
+		if (ret != 0)
+			rte_exit(EXIT_FAILURE, "Cannot create print-stats thread\n");
+		snprintf(thread_name, RTE_MAX_THREAD_NAME_LEN, "print-stats");
+		ret = rte_thread_setname(tid, thread_name);
+		if (ret != 0)
+			RTE_LOG(ERR, VHOST_CONFIG, "Cannot set print-stats name\n");
+	}
+
+	/* Launch all data cores. */
+	RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+		rte_eal_remote_launch(switch_worker,
+			mbuf_pool, lcore_id);
+	}
+	rte_vhost_feature_disable(1ULL << VIRTIO_NET_F_MRG_RXBUF);
+
+	/* Register CUSE device to handle IOCTLs. */
+	ret = rte_vhost_driver_register((char *)&dev_basename);
+	if (ret != 0)
+		rte_exit(EXIT_FAILURE, "CUSE device setup failure.\n");
+
+	rte_vhost_driver_callback_register(&virtio_net_device_ops);
+
+	/* Start CUSE session. */
+	rte_vhost_driver_session_start();
+
+	return 0;
+}
diff --git a/examples/tep_termination/main.h b/examples/tep_termination/main.h
new file mode 100644
index 00000000..a34301ad
--- /dev/null
+++ b/examples/tep_termination/main.h
@@ -0,0 +1,129 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _MAIN_H_
+#define _MAIN_H_
+
+#include <rte_ether.h>
+
+#ifdef DEBUG
+#define LOG_LEVEL RTE_LOG_DEBUG
+#define LOG_DEBUG(log_type, fmt, args...) RTE_LOG(DEBUG, log_type, fmt, ##args)
+#else
+#define LOG_LEVEL RTE_LOG_INFO
+#define LOG_DEBUG(log_type, fmt, args...) do {} while (0)
+#endif
+
+/* Macros for printing using RTE_LOG */
+#define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1
+#define RTE_LOGTYPE_VHOST_DATA   RTE_LOGTYPE_USER2
+#define RTE_LOGTYPE_VHOST_PORT   RTE_LOGTYPE_USER3
+
+/* State of virtio device. */
+#define DEVICE_MAC_LEARNING	0
+#define DEVICE_RX		1
+#define DEVICE_SAFE_REMOVE	2
+
+#define MAX_QUEUES 512
+
+/* Max burst size for RX/TX */
+#define MAX_PKT_BURST 32
+
+/* Max number of devices. Limited by the application. */
+#define MAX_DEVICES 64
+
+/* Per-device statistics struct */
+struct device_statistics {
+	uint64_t tx_total;
+	rte_atomic64_t rx_total_atomic;
+	uint64_t rx_total;
+	uint64_t tx;
+	rte_atomic64_t rx_atomic;
+	/**< Bad inner IP csum for tunneling pkt */
+	rte_atomic64_t rx_bad_ip_csum;
+	/**< Bad inner L4 csum for tunneling pkt */
+	rte_atomic64_t rx_bad_l4_csum;
+} __rte_cache_aligned;
+
+/**
+ * Device linked list structure for data path.
+ */
+struct vhost_dev {
+	/**< Pointer to device created by vhost lib. */
+	struct virtio_net      *dev;
+	/**< Number of memory regions for gpa to hpa translation. */
+	uint32_t nregions_hpa;
+	/**< Memory region information for gpa to hpa translation. */
+	struct virtio_memory_regions_hpa *regions_hpa;
+	/**< Device MAC address (Obtained on first TX packet). */
+	struct ether_addr mac_address;
+	/**< RX queue number. */
+	uint16_t rx_q;
+	/**< Data core that the device is added to. */
+	uint16_t coreid;
+	/**< A device is set as ready if the MAC address has been set. */
+	volatile uint8_t ready;
+	/**< Device is marked for removal from the data core. */
+	volatile uint8_t remove;
+} __rte_cache_aligned;
+
+/**
+ * Structure containing data core specific information.
+ */
+struct lcore_ll_info {
+	/**< Pointer to head in free linked list. */
+	struct virtio_net_data_ll *ll_root_free;
+	/**< Pointer to head of used linked list. */
+	struct virtio_net_data_ll *ll_root_used;
+	/**< Number of devices on lcore. */
+	uint32_t device_num;
+	/**< Flag to synchronize device removal. */
+	volatile uint8_t dev_removal_flag;
+};
+
+struct lcore_info {
+	/**< Pointer to data core specific lcore_ll_info struct */
+	struct lcore_ll_info	*lcore_ll;
+};
+
+struct virtio_net_data_ll {
+	/**< Pointer to device created by configuration core. */
+	struct vhost_dev            *vdev;
+	/**< Pointer to next device in linked list. */
+	struct virtio_net_data_ll   *next;
+};
+
+uint32_t
+virtio_dev_rx(struct virtio_net *dev, struct rte_mbuf **pkts, uint32_t count);
+
+#endif /* _MAIN_H_ */
diff --git a/examples/tep_termination/vxlan.c b/examples/tep_termination/vxlan.c
new file mode 100644
index 00000000..5ee1f956
--- /dev/null
+++ b/examples/tep_termination/vxlan.c
@@ -0,0 +1,259 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <stdint.h>
+#include <rte_mbuf.h>
+#include <rte_hash_crc.h>
+#include <rte_byteorder.h>
+#include <rte_udp.h>
+#include <rte_tcp.h>
+#include <rte_sctp.h>
+
+#include "main.h"
+#include "vxlan.h"
+
+static uint16_t
+get_psd_sum(void *l3_hdr, uint16_t ethertype, uint64_t ol_flags)
+{
+	if (ethertype == ETHER_TYPE_IPv4)
+		return rte_ipv4_phdr_cksum(l3_hdr, ol_flags);
+	else /* assume ethertype == ETHER_TYPE_IPv6 */
+		return rte_ipv6_phdr_cksum(l3_hdr, ol_flags);
+}
+
+/**
+ * Parse an ethernet header to fill the ethertype, outer_l2_len, outer_l3_len and
+ * ipproto. This function is able to recognize IPv4/IPv6 with one optional vlan
+ * header.
+ */
+static void
+parse_ethernet(struct ether_hdr *eth_hdr, union tunnel_offload_info *info,
+		uint8_t *l4_proto)
+{
+	struct ipv4_hdr *ipv4_hdr;
+	struct ipv6_hdr *ipv6_hdr;
+	uint16_t ethertype;
+
+	info->outer_l2_len = sizeof(struct ether_hdr);
+	ethertype = rte_be_to_cpu_16(eth_hdr->ether_type);
+
+	if (ethertype == ETHER_TYPE_VLAN) {
+		struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
+		info->outer_l2_len  += sizeof(struct vlan_hdr);
+		ethertype = rte_be_to_cpu_16(vlan_hdr->eth_proto);
+	}
+
+	switch (ethertype) {
+	case ETHER_TYPE_IPv4:
+		ipv4_hdr = (struct ipv4_hdr *)
+			((char *)eth_hdr + info->outer_l2_len);
+		info->outer_l3_len = sizeof(struct ipv4_hdr);
+		*l4_proto = ipv4_hdr->next_proto_id;
+		break;
+	case ETHER_TYPE_IPv6:
+		ipv6_hdr = (struct ipv6_hdr *)
+			((char *)eth_hdr + info->outer_l2_len);
+		info->outer_l3_len = sizeof(struct ipv6_hdr);
+		*l4_proto = ipv6_hdr->proto;
+		break;
+	default:
+		info->outer_l3_len = 0;
+		*l4_proto = 0;
+		break;
+	}
+}
+
+/**
+ * Calculate the checksum of a packet in hardware
+ */
+static uint64_t
+process_inner_cksums(struct ether_hdr *eth_hdr, union tunnel_offload_info *info)
+{
+	void *l3_hdr = NULL;
+	uint8_t l4_proto;
+	uint16_t ethertype;
+	struct ipv4_hdr *ipv4_hdr;
+	struct ipv6_hdr *ipv6_hdr;
+	struct udp_hdr *udp_hdr;
+	struct tcp_hdr *tcp_hdr;
+	struct sctp_hdr *sctp_hdr;
+	uint64_t ol_flags = 0;
+
+	info->l2_len = sizeof(struct ether_hdr);
+	ethertype = rte_be_to_cpu_16(eth_hdr->ether_type);
+
+	if (ethertype == ETHER_TYPE_VLAN) {
+		struct vlan_hdr *vlan_hdr = (struct vlan_hdr *)(eth_hdr + 1);
+		info->l2_len  += sizeof(struct vlan_hdr);
+		ethertype = rte_be_to_cpu_16(vlan_hdr->eth_proto);
+	}
+
+	l3_hdr = (char *)eth_hdr + info->l2_len;
+
+	if (ethertype == ETHER_TYPE_IPv4) {
+		ipv4_hdr = (struct ipv4_hdr *)l3_hdr;
+		ipv4_hdr->hdr_checksum = 0;
+		ol_flags |= PKT_TX_IPV4;
+		ol_flags |= PKT_TX_IP_CKSUM;
+		info->l3_len = sizeof(struct ipv4_hdr);
+		l4_proto = ipv4_hdr->next_proto_id;
+	} else if (ethertype == ETHER_TYPE_IPv6) {
+		ipv6_hdr = (struct ipv6_hdr *)l3_hdr;
+		info->l3_len = sizeof(struct ipv6_hdr);
+		l4_proto = ipv6_hdr->proto;
+		ol_flags |= PKT_TX_IPV6;
+	} else
+		return 0; /* packet type not supported, nothing to do */
+
+	if (l4_proto == IPPROTO_UDP) {
+		udp_hdr = (struct udp_hdr *)((char *)l3_hdr + info->l3_len);
+		ol_flags |= PKT_TX_UDP_CKSUM;
+		udp_hdr->dgram_cksum = get_psd_sum(l3_hdr,
+				ethertype, ol_flags);
+	} else if (l4_proto == IPPROTO_TCP) {
+		tcp_hdr = (struct tcp_hdr *)((char *)l3_hdr + info->l3_len);
+		ol_flags |= PKT_TX_TCP_CKSUM;
+		tcp_hdr->cksum = get_psd_sum(l3_hdr, ethertype,
+				ol_flags);
+		if (tso_segsz != 0) {
+			ol_flags |= PKT_TX_TCP_SEG;
+			info->tso_segsz = tso_segsz;
+			info->l4_len = sizeof(struct tcp_hdr);
+		}
+
+	} else if (l4_proto == IPPROTO_SCTP) {
+		sctp_hdr = (struct sctp_hdr *)((char *)l3_hdr + info->l3_len);
+		sctp_hdr->cksum = 0;
+		ol_flags |= PKT_TX_SCTP_CKSUM;
+	}
+
+	return ol_flags;
+}
+
+int
+decapsulation(struct rte_mbuf *pkt)
+{
+	uint8_t l4_proto = 0;
+	uint16_t outer_header_len;
+	struct udp_hdr *udp_hdr;
+	union tunnel_offload_info info = { .data = 0 };
+	struct ether_hdr *phdr = rte_pktmbuf_mtod(pkt, struct ether_hdr *);
+
+	parse_ethernet(phdr, &info, &l4_proto);
+
+	if (l4_proto != IPPROTO_UDP)
+		return -1;
+
+	udp_hdr = (struct udp_hdr *)((char *)phdr +
+		info.outer_l2_len + info.outer_l3_len);
+
+	/** check udp destination port, 4789 is the default vxlan port
+	 * (rfc7348) or that the rx offload flag is set (i40e only
+	 * currently)*/
+	if (udp_hdr->dst_port != rte_cpu_to_be_16(DEFAULT_VXLAN_PORT) &&
+		(pkt->packet_type & RTE_PTYPE_TUNNEL_MASK) == 0)
+		return -1;
+	outer_header_len = info.outer_l2_len + info.outer_l3_len
+		+ sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr);
+
+	rte_pktmbuf_adj(pkt, outer_header_len);
+
+	return 0;
+}
+
+void
+encapsulation(struct rte_mbuf *m, uint8_t queue_id)
+{
+	uint vport_id;
+	uint64_t ol_flags = 0;
+	uint32_t old_len = m->pkt_len, hash;
+	union tunnel_offload_info tx_offload = { .data = 0 };
+	struct ether_hdr *phdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+
+	/*Allocate space for new ethernet, IPv4, UDP and VXLAN headers*/
+	struct ether_hdr *pneth = (struct ether_hdr *) rte_pktmbuf_prepend(m,
+		sizeof(struct ether_hdr) + sizeof(struct ipv4_hdr)
+		+ sizeof(struct udp_hdr) + sizeof(struct vxlan_hdr));
+
+	struct ipv4_hdr *ip = (struct ipv4_hdr *) &pneth[1];
+	struct udp_hdr *udp = (struct udp_hdr *) &ip[1];
+	struct vxlan_hdr *vxlan = (struct vxlan_hdr *) &udp[1];
+
+	/* convert TX queue ID to vport ID */
+	vport_id = queue_id - 1;
+
+	/* replace original Ethernet header with ours */
+	pneth = rte_memcpy(pneth, &app_l2_hdr[vport_id],
+		sizeof(struct ether_hdr));
+
+	/* copy in IP header */
+	ip = rte_memcpy(ip, &app_ip_hdr[vport_id],
+		sizeof(struct ipv4_hdr));
+	ip->total_length = rte_cpu_to_be_16(m->data_len
+				- sizeof(struct ether_hdr));
+
+	/* outer IP checksum */
+	ol_flags |= PKT_TX_OUTER_IP_CKSUM;
+	ip->hdr_checksum = 0;
+
+	/* inner IP checksum offload */
+	if (tx_checksum) {
+		ol_flags |= process_inner_cksums(phdr, &tx_offload);
+		m->l2_len = tx_offload.l2_len;
+		m->l3_len = tx_offload.l3_len;
+		m->l4_len = tx_offload.l4_len;
+		m->l2_len += ETHER_VXLAN_HLEN;
+	}
+
+	m->outer_l2_len = sizeof(struct ether_hdr);
+	m->outer_l3_len = sizeof(struct ipv4_hdr);
+
+	m->ol_flags |= ol_flags;
+	m->tso_segsz = tx_offload.tso_segsz;
+
+	/*VXLAN HEADER*/
+	vxlan->vx_flags = rte_cpu_to_be_32(VXLAN_HF_VNI);
+	vxlan->vx_vni = rte_cpu_to_be_32(vxdev.out_key << 8);
+
+	/*UDP HEADER*/
+	udp->dgram_cksum = 0;
+	udp->dgram_len = rte_cpu_to_be_16(old_len
+				+ sizeof(struct udp_hdr)
+				+ sizeof(struct vxlan_hdr));
+
+	udp->dst_port = rte_cpu_to_be_16(vxdev.dst_port);
+	hash = rte_hash_crc(phdr, 2 * ETHER_ADDR_LEN, phdr->ether_type);
+	udp->src_port = rte_cpu_to_be_16((((uint64_t) hash * PORT_RANGE) >> 32)
+					+ PORT_MIN);
+
+	return;
+}
diff --git a/examples/tep_termination/vxlan.h b/examples/tep_termination/vxlan.h
new file mode 100644
index 00000000..4242e111
--- /dev/null
+++ b/examples/tep_termination/vxlan.h
@@ -0,0 +1,86 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _VXLAN_H_
+#define _VXLAN_H_
+
+#include <rte_ether.h>
+#include <rte_ip.h>
+
+#define PORT_MIN	49152
+#define PORT_MAX	65535
+#define PORT_RANGE ((PORT_MAX - PORT_MIN) + 1)
+
+#define VXLAN_N_PORTS  2
+#define VXLAN_HF_VNI 0x08000000
+#define DEFAULT_VXLAN_PORT 4789
+
+extern struct ipv4_hdr app_ip_hdr[VXLAN_N_PORTS];
+extern struct ether_hdr app_l2_hdr[VXLAN_N_PORTS];
+extern uint8_t tx_checksum;
+extern uint16_t tso_segsz;
+
+struct vxlan_port {
+	uint32_t vport_id;           /**< VirtIO port id */
+	uint32_t peer_ip;            /**< remote VTEP IP address */
+	struct ether_addr peer_mac;  /**< remote VTEP MAC address */
+	struct ether_addr vport_mac; /**< VirtIO port MAC address */
+} __rte_cache_aligned;
+
+struct vxlan_conf {
+	uint16_t dst_port;      /**< VXLAN UDP destination port */
+	uint32_t port_ip;       /**< DPDK port IP address*/
+	uint32_t in_key;        /**< VLAN  ID */
+	uint32_t out_key;       /**< VXLAN VNI */
+	struct vxlan_port port[VXLAN_N_PORTS]; /**< VXLAN configuration */
+} __rte_cache_aligned;
+
+extern struct vxlan_conf vxdev;
+
+/* structure that caches offload info for the current packet */
+union tunnel_offload_info {
+	uint64_t data;
+	struct {
+		uint64_t l2_len:7; /**< L2 (MAC) Header Length. */
+		uint64_t l3_len:9; /**< L3 (IP) Header Length. */
+		uint64_t l4_len:8; /**< L4 Header Length. */
+		uint64_t tso_segsz:16; /**< TCP TSO segment size */
+		uint64_t outer_l2_len:7; /**< outer L2 Header Length */
+		uint64_t outer_l3_len:16; /**< outer L3 Header Length */
+	};
+} __rte_cache_aligned;
+
+int decapsulation(struct rte_mbuf *pkt);
+void encapsulation(struct rte_mbuf *m, uint8_t queue_id);
+
+#endif /* _VXLAN_H_ */
diff --git a/examples/tep_termination/vxlan_setup.c b/examples/tep_termination/vxlan_setup.c
new file mode 100644
index 00000000..2a48e142
--- /dev/null
+++ b/examples/tep_termination/vxlan_setup.c
@@ -0,0 +1,457 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <getopt.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/virtio_net.h>
+#include <linux/virtio_ring.h>
+#include <sys/param.h>
+#include <unistd.h>
+
+#include <rte_ethdev.h>
+#include <rte_log.h>
+#include <rte_string_fns.h>
+#include <rte_mbuf.h>
+#include <rte_malloc.h>
+#include <rte_ip.h>
+#include <rte_udp.h>
+#include <rte_tcp.h>
+
+#include "main.h"
+#include "rte_virtio_net.h"
+#include "vxlan.h"
+#include "vxlan_setup.h"
+
+#define IPV4_HEADER_LEN 20
+#define UDP_HEADER_LEN  8
+#define VXLAN_HEADER_LEN 8
+
+#define IP_VERSION 0x40
+#define IP_HDRLEN  0x05 /* default IP header length == five 32-bits words. */
+#define IP_DEFTTL  64   /* from RFC 1340. */
+#define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
+
+#define IP_DN_FRAGMENT_FLAG 0x0040
+
+/* Used to compare MAC addresses. */
+#define MAC_ADDR_CMP 0xFFFFFFFFFFFFULL
+
+/* Configurable number of RX/TX ring descriptors */
+#define RTE_TEST_RX_DESC_DEFAULT 1024
+#define RTE_TEST_TX_DESC_DEFAULT 512
+
+/* Default inner VLAN ID */
+#define INNER_VLAN_ID 100
+
+/* VXLAN device */
+struct vxlan_conf vxdev;
+
+struct ipv4_hdr app_ip_hdr[VXLAN_N_PORTS];
+struct ether_hdr app_l2_hdr[VXLAN_N_PORTS];
+
+/* local VTEP IP address */
+uint8_t vxlan_multicast_ips[2][4] = { {239, 1, 1, 1 }, {239, 1, 2, 1 } };
+
+/* Remote VTEP IP address */
+uint8_t vxlan_overlay_ips[2][4] = { {192, 168, 10, 1}, {192, 168, 30, 1} };
+
+/* Remote VTEP MAC address */
+uint8_t peer_mac[6] = {0x00, 0x11, 0x01, 0x00, 0x00, 0x01};
+
+/* VXLAN RX filter type */
+uint8_t tep_filter_type[] = {RTE_TUNNEL_FILTER_IMAC_TENID,
+			RTE_TUNNEL_FILTER_IMAC_IVLAN_TENID,
+			RTE_TUNNEL_FILTER_OMAC_TENID_IMAC,};
+
+/* Options for configuring ethernet port */
+static const struct rte_eth_conf port_conf = {
+	.rxmode = {
+		.split_hdr_size = 0,
+		.header_split   = 0, /**< Header Split disabled */
+		.hw_ip_checksum = 0, /**< IP checksum offload disabled */
+		.hw_vlan_filter = 0, /**< VLAN filtering disabled */
+		.jumbo_frame    = 0, /**< Jumbo Frame Support disabled */
+		.hw_strip_crc   = 0, /**< CRC stripped by hardware */
+	},
+	.txmode = {
+		.mq_mode = ETH_MQ_TX_NONE,
+	},
+};
+
+/**
+ * The one or two device(s) that belongs to the same tenant ID can
+ * be assigned in a VM.
+ */
+const uint16_t tenant_id_conf[] = {
+	1000, 1000, 1001, 1001, 1002, 1002, 1003, 1003,
+	1004, 1004, 1005, 1005, 1006, 1006, 1007, 1007,
+	1008, 1008, 1009, 1009, 1010, 1010, 1011, 1011,
+	1012, 1012, 1013, 1013, 1014, 1014, 1015, 1015,
+	1016, 1016, 1017, 1017, 1018, 1018, 1019, 1019,
+	1020, 1020, 1021, 1021, 1022, 1022, 1023, 1023,
+	1024, 1024, 1025, 1025, 1026, 1026, 1027, 1027,
+	1028, 1028, 1029, 1029, 1030, 1030, 1031, 1031,
+};
+
+/**
+ * Initialises a given port using global settings and with the rx buffers
+ * coming from the mbuf_pool passed as parameter
+ */
+int
+vxlan_port_init(uint8_t port, struct rte_mempool *mbuf_pool)
+{
+	int retval;
+	uint16_t q;
+	struct rte_eth_dev_info dev_info;
+	uint16_t rx_rings, tx_rings = (uint16_t)rte_lcore_count();
+	const uint16_t rx_ring_size = RTE_TEST_RX_DESC_DEFAULT;
+	const uint16_t tx_ring_size = RTE_TEST_TX_DESC_DEFAULT;
+	struct rte_eth_udp_tunnel tunnel_udp;
+	struct rte_eth_rxconf *rxconf;
+	struct rte_eth_txconf *txconf;
+	struct vxlan_conf *pconf = &vxdev;
+
+	pconf->dst_port = udp_port;
+
+	rte_eth_dev_info_get(port, &dev_info);
+
+	if (dev_info.max_rx_queues > MAX_QUEUES) {
+		rte_exit(EXIT_FAILURE,
+			"please define MAX_QUEUES no less than %u in %s\n",
+			dev_info.max_rx_queues, __FILE__);
+	}
+
+	rxconf = &dev_info.default_rxconf;
+	txconf = &dev_info.default_txconf;
+	txconf->txq_flags = 0;
+
+	if (port >= rte_eth_dev_count())
+		return -1;
+
+	rx_rings = nb_devices;
+
+	/* Configure ethernet device. */
+	retval = rte_eth_dev_configure(port, rx_rings, tx_rings, &port_conf);
+	if (retval != 0)
+		return retval;
+
+	/* Setup the queues. */
+	for (q = 0; q < rx_rings; q++) {
+		retval = rte_eth_rx_queue_setup(port, q, rx_ring_size,
+						rte_eth_dev_socket_id(port),
+						rxconf,
+						mbuf_pool);
+		if (retval < 0)
+			return retval;
+	}
+	for (q = 0; q < tx_rings; q++) {
+		retval = rte_eth_tx_queue_setup(port, q, tx_ring_size,
+						rte_eth_dev_socket_id(port),
+						txconf);
+		if (retval < 0)
+			return retval;
+	}
+
+	/* Start the device. */
+	retval  = rte_eth_dev_start(port);
+	if (retval < 0)
+		return retval;
+
+	/* Configure UDP port for UDP tunneling */
+	tunnel_udp.udp_port = udp_port;
+	tunnel_udp.prot_type = RTE_TUNNEL_TYPE_VXLAN;
+	retval = rte_eth_dev_udp_tunnel_port_add(port, &tunnel_udp);
+	if (retval < 0)
+		return retval;
+	rte_eth_macaddr_get(port, &ports_eth_addr[port]);
+	RTE_LOG(INFO, PORT, "Port %u MAC: %02"PRIx8" %02"PRIx8" %02"PRIx8
+			" %02"PRIx8" %02"PRIx8" %02"PRIx8"\n",
+			(unsigned)port,
+			ports_eth_addr[port].addr_bytes[0],
+			ports_eth_addr[port].addr_bytes[1],
+			ports_eth_addr[port].addr_bytes[2],
+			ports_eth_addr[port].addr_bytes[3],
+			ports_eth_addr[port].addr_bytes[4],
+			ports_eth_addr[port].addr_bytes[5]);
+
+	if (tso_segsz != 0) {
+		struct rte_eth_dev_info dev_info;
+		rte_eth_dev_info_get(port, &dev_info);
+		if ((dev_info.tx_offload_capa & DEV_TX_OFFLOAD_TCP_TSO) == 0)
+			RTE_LOG(WARNING, PORT,
+				"hardware TSO offload is not supported\n");
+	}
+	return 0;
+}
+
+static int
+vxlan_rx_process(struct rte_mbuf *pkt)
+{
+	int ret = 0;
+
+	if (rx_decap)
+		ret = decapsulation(pkt);
+
+	return ret;
+}
+
+static void
+vxlan_tx_process(uint8_t queue_id, struct rte_mbuf *pkt)
+{
+	if (tx_encap)
+		encapsulation(pkt, queue_id);
+
+	return;
+}
+
+/*
+ * This function learns the MAC address of the device and set init
+ * L2 header and L3 header info.
+ */
+int
+vxlan_link(struct vhost_dev *vdev, struct rte_mbuf *m)
+{
+	int i, ret;
+	struct ether_hdr *pkt_hdr;
+	struct virtio_net *dev = vdev->dev;
+	uint64_t portid = dev->device_fh;
+	struct ipv4_hdr *ip;
+
+	struct rte_eth_tunnel_filter_conf tunnel_filter_conf;
+
+	if (unlikely(portid > VXLAN_N_PORTS)) {
+		RTE_LOG(INFO, VHOST_DATA,
+			"(%"PRIu64") WARNING: Not configuring device,"
+			"as already have %d ports for VXLAN.",
+			dev->device_fh, VXLAN_N_PORTS);
+		return -1;
+	}
+
+	/* Learn MAC address of guest device from packet */
+	pkt_hdr = rte_pktmbuf_mtod(m, struct ether_hdr *);
+	if (is_same_ether_addr(&(pkt_hdr->s_addr), &vdev->mac_address)) {
+		RTE_LOG(INFO, VHOST_DATA,
+			"(%"PRIu64") WARNING: This device is using an existing"
+			" MAC address and has not been registered.\n",
+			dev->device_fh);
+		return -1;
+	}
+
+	for (i = 0; i < ETHER_ADDR_LEN; i++) {
+		vdev->mac_address.addr_bytes[i] =
+			vxdev.port[portid].vport_mac.addr_bytes[i] =
+			pkt_hdr->s_addr.addr_bytes[i];
+		vxdev.port[portid].peer_mac.addr_bytes[i] = peer_mac[i];
+	}
+
+	memset(&tunnel_filter_conf, 0,
+		sizeof(struct rte_eth_tunnel_filter_conf));
+
+	ether_addr_copy(&ports_eth_addr[0], &tunnel_filter_conf.outer_mac);
+	tunnel_filter_conf.filter_type = tep_filter_type[filter_idx];
+
+	/* inner MAC */
+	ether_addr_copy(&vdev->mac_address, &tunnel_filter_conf.inner_mac);
+
+	tunnel_filter_conf.queue_id = vdev->rx_q;
+	tunnel_filter_conf.tenant_id = tenant_id_conf[vdev->rx_q];
+
+	if (tep_filter_type[filter_idx] == RTE_TUNNEL_FILTER_IMAC_IVLAN_TENID)
+		tunnel_filter_conf.inner_vlan = INNER_VLAN_ID;
+
+	tunnel_filter_conf.tunnel_type = RTE_TUNNEL_TYPE_VXLAN;
+
+	ret = rte_eth_dev_filter_ctrl(ports[0],
+		RTE_ETH_FILTER_TUNNEL,
+		RTE_ETH_FILTER_ADD,
+		&tunnel_filter_conf);
+	if (ret) {
+		RTE_LOG(ERR, VHOST_DATA,
+			"%d Failed to add device MAC address to cloud filter\n",
+		vdev->rx_q);
+		return -1;
+	}
+
+	/* Print out inner MAC and VNI info. */
+	RTE_LOG(INFO, VHOST_DATA,
+		"(%d) MAC_ADDRESS %02x:%02x:%02x:%02x:%02x:%02x and VNI %d registered\n",
+		vdev->rx_q,
+		vdev->mac_address.addr_bytes[0],
+		vdev->mac_address.addr_bytes[1],
+		vdev->mac_address.addr_bytes[2],
+		vdev->mac_address.addr_bytes[3],
+		vdev->mac_address.addr_bytes[4],
+		vdev->mac_address.addr_bytes[5],
+		tenant_id_conf[vdev->rx_q]);
+
+	vxdev.port[portid].vport_id = portid;
+
+	for (i = 0; i < 4; i++) {
+		/* Local VTEP IP */
+		vxdev.port_ip |= vxlan_multicast_ips[portid][i] << (8 * i);
+		/* Remote VTEP IP */
+		vxdev.port[portid].peer_ip |=
+			vxlan_overlay_ips[portid][i] << (8 * i);
+	}
+
+	vxdev.out_key = tenant_id_conf[vdev->rx_q];
+	ether_addr_copy(&vxdev.port[portid].peer_mac,
+			&app_l2_hdr[portid].d_addr);
+	ether_addr_copy(&ports_eth_addr[0],
+			&app_l2_hdr[portid].s_addr);
+	app_l2_hdr[portid].ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
+
+	ip = &app_ip_hdr[portid];
+	ip->version_ihl = IP_VHL_DEF;
+	ip->type_of_service = 0;
+	ip->total_length = 0;
+	ip->packet_id = 0;
+	ip->fragment_offset = IP_DN_FRAGMENT_FLAG;
+	ip->time_to_live = IP_DEFTTL;
+	ip->next_proto_id = IPPROTO_UDP;
+	ip->hdr_checksum = 0;
+	ip->src_addr = vxdev.port_ip;
+	ip->dst_addr = vxdev.port[portid].peer_ip;
+
+	/* Set device as ready for RX. */
+	vdev->ready = DEVICE_RX;
+
+	return 0;
+}
+
+/**
+ * Removes cloud filter. Ensures that nothing is adding buffers to the RX
+ * queue before disabling RX on the device.
+ */
+void
+vxlan_unlink(struct vhost_dev *vdev)
+{
+	unsigned i = 0, rx_count;
+	int ret;
+	struct rte_mbuf *pkts_burst[MAX_PKT_BURST];
+	struct rte_eth_tunnel_filter_conf tunnel_filter_conf;
+
+	if (vdev->ready == DEVICE_RX) {
+		memset(&tunnel_filter_conf, 0,
+			sizeof(struct rte_eth_tunnel_filter_conf));
+
+		ether_addr_copy(&ports_eth_addr[0], &tunnel_filter_conf.outer_mac);
+		ether_addr_copy(&vdev->mac_address, &tunnel_filter_conf.inner_mac);
+		tunnel_filter_conf.tenant_id = tenant_id_conf[vdev->rx_q];
+		tunnel_filter_conf.filter_type = tep_filter_type[filter_idx];
+
+		if (tep_filter_type[filter_idx] ==
+			RTE_TUNNEL_FILTER_IMAC_IVLAN_TENID)
+			tunnel_filter_conf.inner_vlan = INNER_VLAN_ID;
+
+		tunnel_filter_conf.queue_id = vdev->rx_q;
+		tunnel_filter_conf.tunnel_type = RTE_TUNNEL_TYPE_VXLAN;
+
+		ret = rte_eth_dev_filter_ctrl(ports[0],
+				RTE_ETH_FILTER_TUNNEL,
+				RTE_ETH_FILTER_DELETE,
+				&tunnel_filter_conf);
+		if (ret) {
+			RTE_LOG(ERR, VHOST_DATA,
+				"%d Failed to add device MAC address to cloud filter\n",
+				vdev->rx_q);
+			return;
+		}
+		for (i = 0; i < ETHER_ADDR_LEN; i++)
+			vdev->mac_address.addr_bytes[i] = 0;
+
+		/* Clear out the receive buffers */
+		rx_count = rte_eth_rx_burst(ports[0],
+				(uint16_t)vdev->rx_q,
+				pkts_burst, MAX_PKT_BURST);
+
+		while (rx_count) {
+			for (i = 0; i < rx_count; i++)
+				rte_pktmbuf_free(pkts_burst[i]);
+
+			rx_count = rte_eth_rx_burst(ports[0],
+					(uint16_t)vdev->rx_q,
+					pkts_burst, MAX_PKT_BURST);
+		}
+		vdev->ready = DEVICE_MAC_LEARNING;
+	}
+}
+
+/* Transmit packets after encapsulating */
+int
+vxlan_tx_pkts(uint8_t port_id, uint16_t queue_id,
+		struct rte_mbuf **tx_pkts, uint16_t nb_pkts) {
+	int ret = 0;
+	uint16_t i;
+
+	for (i = 0; i < nb_pkts; i++)
+		vxlan_tx_process(queue_id, tx_pkts[i]);
+
+	ret = rte_eth_tx_burst(port_id, queue_id, tx_pkts, nb_pkts);
+
+	return ret;
+}
+
+/* Check for decapsulation and pass packets directly to VIRTIO device */
+int
+vxlan_rx_pkts(struct virtio_net *dev, struct rte_mbuf **pkts_burst,
+		uint32_t rx_count)
+{
+	uint32_t i = 0;
+	uint32_t count = 0;
+	int ret;
+	struct rte_mbuf *pkts_valid[rx_count];
+
+	for (i = 0; i < rx_count; i++) {
+		if (enable_stats) {
+			rte_atomic64_add(
+				&dev_statistics[dev->device_fh].rx_bad_ip_csum,
+				(pkts_burst[i]->ol_flags & PKT_RX_IP_CKSUM_BAD)
+				!= 0);
+			rte_atomic64_add(
+				&dev_statistics[dev->device_fh].rx_bad_ip_csum,
+				(pkts_burst[i]->ol_flags & PKT_RX_L4_CKSUM_BAD)
+				!= 0);
+		}
+		ret = vxlan_rx_process(pkts_burst[i]);
+		if (unlikely(ret < 0))
+			continue;
+
+		pkts_valid[count] = pkts_burst[i];
+			count++;
+	}
+
+	ret = rte_vhost_enqueue_burst(dev, VIRTIO_RXQ, pkts_valid, count);
+	return ret;
+}
diff --git a/examples/tep_termination/vxlan_setup.h b/examples/tep_termination/vxlan_setup.h
new file mode 100644
index 00000000..1846540f
--- /dev/null
+++ b/examples/tep_termination/vxlan_setup.h
@@ -0,0 +1,87 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef VXLAN_SETUP_H_
+#define VXLAN_SETUP_H_
+
+extern uint16_t nb_devices;
+extern uint16_t udp_port;
+extern uint8_t filter_idx;
+extern uint8_t ports[RTE_MAX_ETHPORTS];
+extern struct ether_addr ports_eth_addr[RTE_MAX_ETHPORTS];
+extern uint32_t enable_stats;
+extern struct device_statistics dev_statistics[MAX_DEVICES];
+extern uint8_t rx_decap;
+extern uint8_t tx_encap;
+
+typedef int (*ol_port_configure_t)(uint8_t port,
+				   struct rte_mempool *mbuf_pool);
+
+typedef int (*ol_tunnel_setup_t)(struct vhost_dev *vdev,
+				 struct rte_mbuf *m);
+
+typedef void (*ol_tunnel_destroy_t)(struct vhost_dev *vdev);
+
+typedef int (*ol_tx_handle_t)(uint8_t port_id, uint16_t queue_id,
+			      struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
+
+typedef int (*ol_rx_handle_t)(struct virtio_net *dev, struct rte_mbuf **pkts,
+			      uint32_t count);
+
+typedef int (*ol_param_handle)(struct virtio_net *dev);
+
+struct ol_switch_ops {
+	ol_port_configure_t        port_configure;
+	ol_tunnel_setup_t          tunnel_setup;
+	ol_tunnel_destroy_t        tunnel_destroy;
+	ol_tx_handle_t             tx_handle;
+	ol_rx_handle_t             rx_handle;
+	ol_param_handle            param_handle;
+};
+
+int
+vxlan_port_init(uint8_t port, struct rte_mempool *mbuf_pool);
+
+int
+vxlan_link(struct vhost_dev *vdev, struct rte_mbuf *m);
+
+void
+vxlan_unlink(struct vhost_dev *vdev);
+
+int
+vxlan_tx_pkts(uint8_t port_id, uint16_t queue_id,
+			struct rte_mbuf **tx_pkts, uint16_t nb_pkts);
+int
+vxlan_rx_pkts(struct virtio_net *dev, struct rte_mbuf **pkts, uint32_t count);
+
+#endif /* VXLAN_SETUP_H_ */