+/**
+ * Get how many avail entries are left in the queue
+ *
+ * @param vid
+ * virtio-net device ID
+ * @param queue_id
+ * virtio queue index
+ *
+ * @return
+ * num of avail entires left
+ */
+uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id);
+
+/**
+ * This function adds buffers to the virtio devices RX virtqueue. Buffers can
+ * be received from the physical port or from another virtual device. A packet
+ * count is returned to indicate the number of packets that were succesfully
+ * added to the RX queue.
+ * @param vid
+ * virtio-net device ID
+ * @param queue_id
+ * virtio queue index in mq case
+ * @param pkts
+ * array to contain packets to be enqueued
+ * @param count
+ * packets num to be enqueued
+ * @return
+ * num of packets enqueued
+ */
+uint16_t rte_vhost_enqueue_burst(int vid, uint16_t queue_id,
+ struct rte_mbuf **pkts, uint16_t count);
+
+/**
+ * This function gets guest buffers from the virtio device TX virtqueue,
+ * construct host mbufs, copies guest buffer content to host mbufs and
+ * store them in pkts to be processed.
+ * @param vid
+ * virtio-net device
+ * @param queue_id
+ * virtio queue index in mq case
+ * @param mbuf_pool
+ * mbuf_pool where host mbuf is allocated.
+ * @param pkts
+ * array to contain packets to be dequeued
+ * @param count
+ * packets num to be dequeued
+ * @return
+ * num of packets dequeued
+ */
+uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
+ struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count);