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diff --git a/examples/vhost_xen/virtio-net.h b/examples/vhost_xen/virtio-net.h
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+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2014 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 _VIRTIO_NET_H_
+#define _VIRTIO_NET_H_
+
+#include <stdint.h>
+
+#define VQ_DESC_NUM 256
+/* Used to indicate that the device is running on a data core */
+#define VIRTIO_DEV_RUNNING 1
+
+/*
+ * Structure contains variables relevant to TX/RX virtqueues.
+ */
+struct vhost_virtqueue
+{
+	struct vring_desc  *desc;             /* Virtqueue descriptor ring. */
+	struct vring_avail *avail;            /* Virtqueue available ring. */
+	struct vring_used  *used;             /* Virtqueue used ring. */
+	uint32_t           size;              /* Size of descriptor ring. */
+	uint32_t           vhost_hlen;        /* Vhost header length (varies depending on RX merge buffers. */
+	volatile uint16_t  last_used_idx;     /* Last index used on the available ring */
+	volatile uint16_t  last_used_idx_res; /* Used for multiple devices reserving buffers. */
+} __rte_cache_aligned;
+
+/*
+ * Device structure contains all configuration information relating to the device.
+ */
+struct virtio_net
+{
+	struct vhost_virtqueue	*virtqueue_tx;	/* Contains all TX virtqueue information. */
+	struct vhost_virtqueue	*virtqueue_rx;	/* Contains all RX virtqueue information. */
+	struct virtio_memory    *mem;           /* QEMU memory and memory region information. */
+	struct ether_addr       mac_address;    /* Device MAC address (Obtained on first TX packet). */
+	uint32_t                flags;          /* Device flags. Only used to check if device is running on data core. */
+	uint32_t                vlan_tag;       /* Vlan tag for device. Currently set to device_id (0-63). */
+	uint32_t                vmdq_rx_q;
+	uint64_t                device_fh;      /* device identifier. */
+	uint16_t                coreid;
+	volatile uint8_t        ready;          /* A device is set as ready if the MAC address has been set. */
+	volatile uint8_t        remove;         /* Device is marked for removal from the data core. */
+	uint32_t                virtio_idx;     /* Index of virtio device */
+	uint32_t                dom_id;         /* Domain id of xen guest */
+} ___rte_cache_aligned;
+
+/*
+ * Device linked list structure for configuration.
+ */
+struct virtio_net_config_ll
+{
+	struct virtio_net		dev;	/* Virtio device. */
+	struct virtio_net_config_ll	*next; /* Next entry on linked list. */
+};
+
+/*
+ * Information relating to memory regions including offsets to addresses in QEMUs memory file.
+ */
+struct virtio_memory_regions {
+	uint64_t	guest_phys_address;     /* Base guest physical address of region. */
+	uint64_t	guest_phys_address_end;	/* End guest physical address of region. */
+	uint64_t	memory_size;		/* Size of region. */
+	uint64_t	userspace_address;      /* Base userspace address of region. */
+	uint64_t	address_offset;         /* Offset of region for address translation. */
+};
+
+/*
+ * Memory structure includes region and mapping information.
+ */
+struct virtio_memory {
+	uint32_t			nregions;	/* Number of memory regions. */
+	struct virtio_memory_regions 	regions[0];	/* Memory region information. */
+};
+
+/*
+ * Device operations to add/remove device.
+ */
+struct virtio_net_device_ops {
+	int (* new_device)(struct virtio_net *);	/* Add device. */
+	void (* destroy_device)	(volatile struct virtio_net *);	/* Remove device. */
+};
+
+#endif