virtio: refactor code

Type: refactor

Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
Change-Id: I3788cc857023fafcc8eb6d6ff4524425026a75d8

19 files changed, 351 insertions, 355 deletions

diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c
index 0fa2e5d95af..7c8a9b04779 100644
--- a/src/vnet/devices/tap/tap.c
+++ b/src/vnet/devices/tap/tap.c
@@ -272,7 +272,7 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
   else
     ifr.ifr_flags |= IFF_MULTI_QUEUE;
 
-  hdrsz = sizeof (virtio_net_hdr_v1_t);
+  hdrsz = sizeof (vnet_virtio_net_hdr_v1_t);
   if (args->tap_flags & TAP_FLAG_GSO)
     {
       offload = TUN_F_CSUM | TUN_F_TSO4 | TUN_F_TSO6;
@@ -577,7 +577,7 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
       vhost_vring_addr_t addr = { 0 };
       vhost_vring_state_t state = { 0 };
       vhost_vring_file_t file = { 0 };
-      virtio_vring_t *vring;
+      vnet_virtio_vring_t *vring;
       u16 qp = i >> 1;
       int fd = vif->vhost_fds[qp];
 
@@ -595,7 +595,7 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
 	}
 
       addr.index = state.index = file.index = vring->queue_id & 1;
-      state.num = vring->size;
+      state.num = vring->queue_size;
       virtio_log_debug (vif, "VHOST_SET_VRING_NUM fd %d index %u num %u", fd,
 			state.index, state.num);
       _IOCTL (fd, VHOST_SET_VRING_NUM, &state);
@@ -880,7 +880,7 @@ tap_dump_ifs (tap_interface_details_t ** out_tapids)
   vnet_main_t *vnm = vnet_get_main ();
   virtio_main_t *mm = &virtio_main;
   virtio_if_t *vif;
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   vnet_hw_interface_t *hi;
   tap_interface_details_t *r_tapids = NULL;
   tap_interface_details_t *tapid = NULL;
@@ -898,9 +898,9 @@ tap_dump_ifs (tap_interface_details_t ** out_tapids)
     clib_memcpy(tapid->dev_name, hi->name,
                 MIN (ARRAY_LEN (tapid->dev_name) - 1, vec_len (hi->name)));
     vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS(0));
-    tapid->rx_ring_sz = vring->size;
+    tapid->rx_ring_sz = vring->queue_size;
     vring = vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS(0));
-    tapid->tx_ring_sz = vring->size;
+    tapid->tx_ring_sz = vring->queue_size;
     tapid->tap_flags = vif->tap_flags;
     clib_memcpy(&tapid->host_mac_addr, vif->host_mac_addr, 6);
     if (vif->host_if_name)
diff --git a/src/vnet/devices/virtio/device.c b/src/vnet/devices/virtio/device.c
index 17b3a175e20..bd06d0fb648 100644
--- a/src/vnet/devices/virtio/device.c
+++ b/src/vnet/devices/virtio/device.c
@@ -166,11 +166,12 @@ virtio_memset_ring_u32 (u32 *ring, u32 start, u32 ring_size, u32 n_buffers)
 }
 
 static void
-virtio_free_used_device_desc_split (vlib_main_t *vm, virtio_vring_t *vring,
+virtio_free_used_device_desc_split (vlib_main_t *vm,
+				    vnet_virtio_vring_t *vring,
 				    uword node_index)
 {
   u16 used = vring->desc_in_use;
-  u16 sz = vring->size;
+  u16 sz = vring->queue_size;
   u16 mask = sz - 1;
   u16 last = vring->last_used_idx;
   u16 n_left = vring->used->idx - last;
@@ -181,7 +182,7 @@ virtio_free_used_device_desc_split (vlib_main_t *vm, virtio_vring_t *vring,
 
   while (n_left)
     {
-      vring_used_elem_t *e = &vring->used->ring[last & mask];
+      vnet_virtio_vring_used_elem_t *e = &vring->used->ring[last & mask];
       u16 slot, n_buffers;
       slot = n_buffers = e->id;
 
@@ -190,7 +191,7 @@ virtio_free_used_device_desc_split (vlib_main_t *vm, virtio_vring_t *vring,
 	  n_left--;
 	  last++;
 	  n_buffers++;
-	  vring_desc_t *d = &vring->desc[e->id];
+	  vnet_virtio_vring_desc_t *d = &vring->desc[e->id];
 	  u16 next;
 	  while (d->flags & VRING_DESC_F_NEXT)
 	    {
@@ -232,11 +233,12 @@ virtio_free_used_device_desc_split (vlib_main_t *vm, virtio_vring_t *vring,
 }
 
 static void
-virtio_free_used_device_desc_packed (vlib_main_t *vm, virtio_vring_t *vring,
+virtio_free_used_device_desc_packed (vlib_main_t *vm,
+				     vnet_virtio_vring_t *vring,
 				     uword node_index)
 {
-  vring_packed_desc_t *d;
-  u16 sz = vring->size;
+  vnet_virtio_vring_packed_desc_t *d;
+  u16 sz = vring->queue_size;
   u16 last = vring->last_used_idx;
   u16 n_buffers = 0, start;
   u16 flags;
@@ -273,7 +275,7 @@ virtio_free_used_device_desc_packed (vlib_main_t *vm, virtio_vring_t *vring,
 }
 
 static void
-virtio_free_used_device_desc (vlib_main_t *vm, virtio_vring_t *vring,
+virtio_free_used_device_desc (vlib_main_t *vm, vnet_virtio_vring_t *vring,
 			      uword node_index, int packed)
 {
   if (packed)
@@ -284,7 +286,7 @@ virtio_free_used_device_desc (vlib_main_t *vm, virtio_vring_t *vring,
 }
 
 static void
-set_checksum_offsets (vlib_buffer_t *b, virtio_net_hdr_v1_t *hdr,
+set_checksum_offsets (vlib_buffer_t *b, vnet_virtio_net_hdr_v1_t *hdr,
 		      const int is_l2)
 {
   vnet_buffer_oflags_t oflags = vnet_buffer (b)->oflags;
@@ -357,7 +359,8 @@ set_checksum_offsets (vlib_buffer_t *b, virtio_net_hdr_v1_t *hdr,
 }
 
 static void
-set_gso_offsets (vlib_buffer_t *b, virtio_net_hdr_v1_t *hdr, const int is_l2)
+set_gso_offsets (vlib_buffer_t *b, vnet_virtio_net_hdr_v1_t *hdr,
+		 const int is_l2)
 {
   vnet_buffer_oflags_t oflags = vnet_buffer (b)->oflags;
 
@@ -398,17 +401,17 @@ set_gso_offsets (vlib_buffer_t *b, virtio_net_hdr_v1_t *hdr, const int is_l2)
 
 static u16
 add_buffer_to_slot (vlib_main_t *vm, vlib_node_runtime_t *node,
-		    virtio_if_t *vif, virtio_vring_t *vring, u32 bi,
+		    virtio_if_t *vif, vnet_virtio_vring_t *vring, u32 bi,
 		    u16 free_desc_count, u16 avail, u16 next, u16 mask,
 		    int hdr_sz, int do_gso, int csum_offload, int is_pci,
 		    int is_tun, int is_indirect, int is_any_layout)
 {
   u16 n_added = 0;
-  vring_desc_t *d;
+  vnet_virtio_vring_desc_t *d;
   int is_l2 = !is_tun;
   d = &vring->desc[next];
   vlib_buffer_t *b = vlib_get_buffer (vm, bi);
-  virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
+  vnet_virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
   u32 drop_inline = ~0;
 
   clib_memset_u8 (hdr, 0, hdr_sz);
@@ -469,8 +472,8 @@ add_buffer_to_slot (vlib_main_t *vm, vlib_node_runtime_t *node,
       indirect_desc->next_buffer = bi;
       bi = indirect_buffer;
 
-      vring_desc_t *id =
-	(vring_desc_t *) vlib_buffer_get_current (indirect_desc);
+      vnet_virtio_vring_desc_t *id =
+	(vnet_virtio_vring_desc_t *) vlib_buffer_get_current (indirect_desc);
       u32 count = 1;
       if (is_pci)
 	{
@@ -539,7 +542,7 @@ add_buffer_to_slot (vlib_main_t *vm, vlib_node_runtime_t *node,
 	}
       id->flags = 0;
       id->next = 0;
-      d->len = count * sizeof (vring_desc_t);
+      d->len = count * sizeof (vnet_virtio_vring_desc_t);
       d->flags = VRING_DESC_F_INDIRECT;
     }
   else if (is_pci)
@@ -605,16 +608,16 @@ done:
 
 static u16
 add_buffer_to_slot_packed (vlib_main_t *vm, vlib_node_runtime_t *node,
-			   virtio_if_t *vif, virtio_vring_t *vring, u32 bi,
-			   u16 next, int hdr_sz, int do_gso, int csum_offload,
-			   int is_pci, int is_tun, int is_indirect,
-			   int is_any_layout)
+			   virtio_if_t *vif, vnet_virtio_vring_t *vring,
+			   u32 bi, u16 next, int hdr_sz, int do_gso,
+			   int csum_offload, int is_pci, int is_tun,
+			   int is_indirect, int is_any_layout)
 {
   u16 n_added = 0, flags = 0;
   int is_l2 = !is_tun;
-  vring_packed_desc_t *d = &vring->packed_desc[next];
+  vnet_virtio_vring_packed_desc_t *d = &vring->packed_desc[next];
   vlib_buffer_t *b = vlib_get_buffer (vm, bi);
-  virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
+  vnet_virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
   u32 drop_inline = ~0;
 
   clib_memset (hdr, 0, hdr_sz);
@@ -675,8 +678,9 @@ add_buffer_to_slot_packed (vlib_main_t *vm, vlib_node_runtime_t *node,
       indirect_desc->next_buffer = bi;
       bi = indirect_buffer;
 
-      vring_packed_desc_t *id =
-	(vring_packed_desc_t *) vlib_buffer_get_current (indirect_desc);
+      vnet_virtio_vring_packed_desc_t *id =
+	(vnet_virtio_vring_packed_desc_t *) vlib_buffer_get_current (
+	  indirect_desc);
       u32 count = 1;
       if (is_pci)
 	{
@@ -720,7 +724,7 @@ add_buffer_to_slot_packed (vlib_main_t *vm, vlib_node_runtime_t *node,
 	}
       id->flags = 0;
       id->id = 0;
-      d->len = count * sizeof (vring_packed_desc_t);
+      d->len = count * sizeof (vnet_virtio_vring_packed_desc_t);
       flags = VRING_DESC_F_INDIRECT;
     }
   else
@@ -752,12 +756,10 @@ done:
 }
 
 static uword
-virtio_interface_tx_packed_gso_inline (vlib_main_t *vm,
-				       vlib_node_runtime_t *node,
-				       virtio_if_t *vif, virtio_if_type_t type,
-				       virtio_vring_t *vring, u32 *buffers,
-				       u16 n_left, const int do_gso,
-				       const int csum_offload)
+virtio_interface_tx_packed_gso_inline (
+  vlib_main_t *vm, vlib_node_runtime_t *node, virtio_if_t *vif,
+  virtio_if_type_t type, vnet_virtio_vring_t *vring, u32 *buffers, u16 n_left,
+  const int do_gso, const int csum_offload)
 {
   int is_pci = (type == VIRTIO_IF_TYPE_PCI);
   int is_tun = (type == VIRTIO_IF_TYPE_TUN);
@@ -766,7 +768,7 @@ virtio_interface_tx_packed_gso_inline (vlib_main_t *vm,
   int is_any_layout =
     ((vif->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)) != 0);
   const int hdr_sz = vif->virtio_net_hdr_sz;
-  u16 sz = vring->size;
+  u16 sz = vring->queue_size;
   u16 used, next, n_buffers = 0, n_buffers_left = 0;
   u16 n_vectors = n_left;
 
@@ -838,7 +840,7 @@ virtio_interface_tx_packed_gso_inline (vlib_main_t *vm,
 }
 
 static void
-virtio_find_free_desc (virtio_vring_t *vring, u16 size, u16 mask, u16 req,
+virtio_find_free_desc (vnet_virtio_vring_t *vring, u16 size, u16 mask, u16 req,
 		       u16 next, u32 *first_free_desc_index,
 		       u16 *free_desc_count)
 {
@@ -877,7 +879,7 @@ static u16
 virtio_interface_tx_split_gso_inline (vlib_main_t *vm,
 				      vlib_node_runtime_t *node,
 				      virtio_if_t *vif, virtio_if_type_t type,
-				      virtio_vring_t *vring, u32 *buffers,
+				      vnet_virtio_vring_t *vring, u32 *buffers,
 				      u16 n_left, int do_gso, int csum_offload)
 {
   u16 used, next, avail, n_buffers = 0, n_buffers_left = 0;
@@ -887,7 +889,7 @@ virtio_interface_tx_split_gso_inline (vlib_main_t *vm,
     ((vif->features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) != 0);
   int is_any_layout =
     ((vif->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)) != 0);
-  u16 sz = vring->size;
+  u16 sz = vring->queue_size;
   int hdr_sz = vif->virtio_net_hdr_sz;
   u16 mask = sz - 1;
   u16 n_vectors = n_left;
@@ -986,7 +988,7 @@ virtio_interface_tx_split_gso_inline (vlib_main_t *vm,
 static u16
 virtio_interface_tx_gso_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
 				virtio_if_t *vif, virtio_if_type_t type,
-				virtio_vring_t *vring, u32 *buffers,
+				vnet_virtio_vring_t *vring, u32 *buffers,
 				u16 n_left, int packed, int do_gso,
 				int csum_offload)
 {
@@ -1002,7 +1004,7 @@ virtio_interface_tx_gso_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
 
 static u16
 virtio_interface_tx_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
-			    virtio_if_t *vif, virtio_vring_t *vring,
+			    virtio_if_t *vif, vnet_virtio_vring_t *vring,
 			    virtio_if_type_t type, u32 *buffers, u16 n_left,
 			    int packed)
 {
@@ -1035,7 +1037,7 @@ VNET_DEVICE_CLASS_TX_FN (virtio_device_class) (vlib_main_t * vm,
   virtio_if_t *vif = pool_elt_at_index (nm->interfaces, rund->dev_instance);
   vnet_hw_if_tx_frame_t *tf = vlib_frame_scalar_args (frame);
   u16 qid = tf->queue_id;
-  virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, qid);
+  vnet_virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, qid);
   u16 n_left = frame->n_vectors;
   u32 *buffers = vlib_frame_vector_args (frame);
   u32 to[GRO_TO_VECTOR_SIZE (n_left)];
@@ -1127,7 +1129,7 @@ virtio_clear_hw_interface_counters (u32 instance)
 }
 
 static void
-virtio_set_rx_interrupt (virtio_if_t *vif, virtio_vring_t *vring)
+virtio_set_rx_interrupt (virtio_if_t *vif, vnet_virtio_vring_t *vring)
 {
   if (vif->is_packed)
     vring->driver_event->flags &= ~VRING_EVENT_F_DISABLE;
@@ -1136,7 +1138,7 @@ virtio_set_rx_interrupt (virtio_if_t *vif, virtio_vring_t *vring)
 }
 
 static void
-virtio_set_rx_polling (virtio_if_t *vif, virtio_vring_t *vring)
+virtio_set_rx_polling (virtio_if_t *vif, vnet_virtio_vring_t *vring)
 {
   if (vif->is_packed)
     vring->driver_event->flags |= VRING_EVENT_F_DISABLE;
@@ -1151,7 +1153,7 @@ virtio_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
   virtio_main_t *mm = &virtio_main;
   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
   virtio_if_t *vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
-  virtio_vring_t *rx_vring = vec_elt_at_index (vif->rxq_vrings, qid);
+  vnet_virtio_vring_t *rx_vring = vec_elt_at_index (vif->rxq_vrings, qid);
 
   if (vif->type == VIRTIO_IF_TYPE_PCI && !(vif->support_int_mode))
     {
diff --git a/src/vnet/devices/virtio/node.c b/src/vnet/devices/virtio/node.c
index 2d2da189d5d..1de4fb73f7d 100644
--- a/src/vnet/devices/virtio/node.c
+++ b/src/vnet/devices/virtio/node.c
@@ -47,7 +47,7 @@ typedef struct
   u32 hw_if_index;
   u16 ring;
   u16 len;
-  virtio_net_hdr_v1_t hdr;
+  vnet_virtio_net_hdr_v1_t hdr;
 } virtio_input_trace_t;
 
 static u8 *
@@ -69,8 +69,8 @@ format_virtio_input_trace (u8 * s, va_list * args)
 }
 
 static_always_inline void
-virtio_needs_csum (vlib_buffer_t * b0, virtio_net_hdr_v1_t * hdr,
-		   u8 * l4_proto, u8 * l4_hdr_sz, virtio_if_type_t type)
+virtio_needs_csum (vlib_buffer_t *b0, vnet_virtio_net_hdr_v1_t *hdr,
+		   u8 *l4_proto, u8 *l4_hdr_sz, virtio_if_type_t type)
 {
   if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM)
     {
@@ -161,7 +161,7 @@ virtio_needs_csum (vlib_buffer_t * b0, virtio_net_hdr_v1_t * hdr,
 }
 
 static_always_inline void
-fill_gso_buffer_flags (vlib_buffer_t * b0, virtio_net_hdr_v1_t * hdr,
+fill_gso_buffer_flags (vlib_buffer_t *b0, vnet_virtio_net_hdr_v1_t *hdr,
 		       u8 l4_proto, u8 l4_hdr_sz)
 {
   if (hdr->gso_type == VIRTIO_NET_HDR_GSO_TCPV4)
@@ -181,7 +181,7 @@ fill_gso_buffer_flags (vlib_buffer_t * b0, virtio_net_hdr_v1_t * hdr,
 }
 
 static_always_inline u16
-virtio_n_left_to_process (virtio_vring_t * vring, const int packed)
+virtio_n_left_to_process (vnet_virtio_vring_t *vring, const int packed)
 {
   if (packed)
     return vring->desc_in_use;
@@ -190,7 +190,7 @@ virtio_n_left_to_process (virtio_vring_t * vring, const int packed)
 }
 
 static_always_inline u16
-virtio_get_slot_id (virtio_vring_t * vring, const int packed, u16 last,
+virtio_get_slot_id (vnet_virtio_vring_t *vring, const int packed, u16 last,
 		    u16 mask)
 {
   if (packed)
@@ -200,7 +200,7 @@ virtio_get_slot_id (virtio_vring_t * vring, const int packed, u16 last,
 }
 
 static_always_inline u16
-virtio_get_len (virtio_vring_t * vring, const int packed, const int hdr_sz,
+virtio_get_len (vnet_virtio_vring_t *vring, const int packed, const int hdr_sz,
 		u16 last, u16 mask)
 {
   if (packed)
@@ -209,22 +209,24 @@ virtio_get_len (virtio_vring_t * vring, const int packed, const int hdr_sz,
     return vring->used->ring[last & mask].len - hdr_sz;
 }
 
-#define increment_last(last, packed, vring) \
-   do {					    \
-         last++;                            \
-         if (packed && last >= vring->size) \
-           {                                \
-             last = 0;                      \
-             vring->used_wrap_counter ^= 1; \
-           }                                \
-    } while (0)
+#define increment_last(last, packed, vring)                                   \
+  do                                                                          \
+    {                                                                         \
+      last++;                                                                 \
+      if (packed && last >= vring->queue_size)                                \
+	{                                                                     \
+	  last = 0;                                                           \
+	  vring->used_wrap_counter ^= 1;                                      \
+	}                                                                     \
+    }                                                                         \
+  while (0)
 
 static_always_inline uword
-virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
-				vlib_frame_t * frame, virtio_if_t * vif,
-				virtio_vring_t * vring, virtio_if_type_t type,
-				int gso_enabled, int checksum_offload_enabled,
-				int packed)
+virtio_device_input_gso_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
+				vlib_frame_t *frame, virtio_if_t *vif,
+				vnet_virtio_vring_t *vring,
+				virtio_if_type_t type, int gso_enabled,
+				int checksum_offload_enabled, int packed)
 {
   vnet_main_t *vnm = vnet_get_main ();
   u32 thread_index = vm->thread_index;
@@ -234,7 +236,7 @@ virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
   u32 *to_next = 0;
   u32 n_rx_packets = 0;
   u32 n_rx_bytes = 0;
-  u16 mask = vring->size - 1;
+  u16 mask = vring->queue_size - 1;
   u16 last = vring->last_used_idx;
   u16 n_left = virtio_n_left_to_process (vring, packed);
   vlib_buffer_t bt = {};
@@ -267,7 +269,7 @@ virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	{
 	  if (packed)
 	    {
-	      vring_packed_desc_t *d = &vring->packed_desc[last];
+	      vnet_virtio_vring_packed_desc_t *d = &vring->packed_desc[last];
 	      u16 flags = d->flags;
 	      if ((flags & VRING_DESC_F_AVAIL) !=
 		  (vring->used_wrap_counter << 7)
@@ -280,13 +282,13 @@ virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 	    }
 	  u8 l4_proto = 0, l4_hdr_sz = 0;
 	  u16 num_buffers = 1;
-	  virtio_net_hdr_v1_t *hdr;
+	  vnet_virtio_net_hdr_v1_t *hdr;
 	  u16 slot = virtio_get_slot_id (vring, packed, last, mask);
 	  u16 len = virtio_get_len (vring, packed, hdr_sz, last, mask);
 	  u32 bi0 = vring->buffers[slot];
 	  vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
 	  hdr = vlib_buffer_get_current (b0);
-	  if (hdr_sz == sizeof (virtio_net_hdr_v1_t))
+	  if (hdr_sz == sizeof (vnet_virtio_net_hdr_v1_t))
 	    num_buffers = hdr->num_buffers;
 
 	  b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
@@ -408,7 +410,7 @@ virtio_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
 			    vlib_frame_t * frame, virtio_if_t * vif, u16 qid,
 			    virtio_if_type_t type)
 {
-  virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
+  vnet_virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
   const int hdr_sz = vif->virtio_net_hdr_sz;
   uword rv;
 
diff --git a/src/vnet/devices/virtio/pci.c b/src/vnet/devices/virtio/pci.c
index 1d2699bbb36..07744c20301 100644
--- a/src/vnet/devices/virtio/pci.c
+++ b/src/vnet/devices/virtio/pci.c
@@ -116,7 +116,7 @@ virtio_pci_irq_queue_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h,
   line--;
   u16 qid = line;
 
-  virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
+  vnet_virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
   vnet_hw_if_rx_queue_set_int_pending (vnm, vring->queue_index);
 }
 
@@ -198,18 +198,18 @@ static int
 virtio_pci_send_ctrl_msg_packed (vlib_main_t * vm, virtio_if_t * vif,
 				 virtio_ctrl_msg_t * data, u32 len)
 {
-  virtio_vring_t *vring = vif->cxq_vring;
+  vnet_virtio_vring_t *vring = vif->cxq_vring;
   virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
   virtio_ctrl_msg_t result;
   u32 buffer_index;
   vlib_buffer_t *b;
   u16 used, next;
-  u16 sz = vring->size;
+  u16 sz = vring->queue_size;
   u16 flags = 0, first_desc_flags = 0;
 
   used = vring->desc_in_use;
   next = vring->desc_next;
-  vring_packed_desc_t *d = &vring->packed_desc[next];
+  vnet_virtio_vring_packed_desc_t *d = &vring->packed_desc[next];
 
   if (vlib_buffer_alloc (vm, &buffer_index, 1))
     b = vlib_get_buffer (vm, buffer_index);
@@ -317,9 +317,9 @@ virtio_pci_send_ctrl_msg_packed (vlib_main_t * vm, virtio_if_t * vif,
 	 || (flags & VRING_DESC_F_USED) != (vring->used_wrap_counter << 15));
 
   last += 3;
-  if (last >= vring->size)
+  if (last >= vring->queue_size)
     {
-      last = last - vring->size;
+      last = last - vring->queue_size;
       vring->used_wrap_counter ^= 1;
     }
   vring->desc_in_use -= 3;
@@ -338,19 +338,19 @@ static int
 virtio_pci_send_ctrl_msg_split (vlib_main_t * vm, virtio_if_t * vif,
 				virtio_ctrl_msg_t * data, u32 len)
 {
-  virtio_vring_t *vring = vif->cxq_vring;
+  vnet_virtio_vring_t *vring = vif->cxq_vring;
   virtio_net_ctrl_ack_t status = VIRTIO_NET_ERR;
   virtio_ctrl_msg_t result;
   u32 buffer_index;
   vlib_buffer_t *b;
   u16 used, next, avail;
-  u16 sz = vring->size;
+  u16 sz = vring->queue_size;
   u16 mask = sz - 1;
 
   used = vring->desc_in_use;
   next = vring->desc_next;
   avail = vring->avail->idx;
-  vring_desc_t *d = &vring->desc[next];
+  vnet_virtio_vring_desc_t *d = &vring->desc[next];
 
   if (vlib_buffer_alloc (vm, &buffer_index, 1))
     b = vlib_get_buffer (vm, buffer_index);
@@ -403,7 +403,7 @@ virtio_pci_send_ctrl_msg_split (vlib_main_t * vm, virtio_if_t * vif,
 
   while (n_left)
     {
-      vring_used_elem_t *e = &vring->used->ring[last & mask];
+      vnet_virtio_vring_used_elem_t *e = &vring->used->ring[last & mask];
       u16 slot = e->id;
 
       d = &vring->desc[slot];
@@ -600,7 +600,7 @@ virtio_pci_control_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
 {
   clib_error_t *error = 0;
   u16 queue_size = 0;
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   u32 i = 0;
   void *ptr = NULL;
 
@@ -615,34 +615,35 @@ virtio_pci_control_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
   vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
   vring = vec_elt_at_index (vif->cxq_vring, 0);
 
-  i =
-    (((queue_size * sizeof (vring_packed_desc_t)) +
-      sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
-      1) & ~(VIRTIO_PCI_VRING_ALIGN - 1)) + sizeof (vring_desc_event_t);
+  i = (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
+	sizeof (vnet_virtio_vring_desc_event_t) + VNET_VIRTIO_PCI_VRING_ALIGN -
+	1) &
+       ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1)) +
+      sizeof (vnet_virtio_vring_desc_event_t);
 
-  ptr =
-    vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
-					vif->numa_node);
+  ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_VIRTIO_PCI_VRING_ALIGN,
+					    vif->numa_node);
   if (!ptr)
     return vlib_physmem_last_error (vm);
   clib_memset (ptr, 0, i);
 
   vring->packed_desc = ptr;
 
-  vring->driver_event = ptr + (queue_size * sizeof (vring_packed_desc_t));
+  vring->driver_event =
+    ptr + (queue_size * sizeof (vnet_virtio_vring_packed_desc_t));
   vring->driver_event->off_wrap = 0;
   vring->driver_event->flags = VRING_EVENT_F_DISABLE;
 
   vring->device_event =
-    ptr +
-    (((queue_size * sizeof (vring_packed_desc_t)) +
-      sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
-      1) & ~(VIRTIO_PCI_VRING_ALIGN - 1));
+    ptr + (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
+	    sizeof (vnet_virtio_vring_desc_event_t) +
+	    VNET_VIRTIO_PCI_VRING_ALIGN - 1) &
+	   ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1));
   vring->device_event->off_wrap = 0;
   vring->device_event->flags = 0;
 
   vring->queue_id = queue_num;
-  vring->size = queue_size;
+  vring->queue_size = queue_size;
   vring->avail_wrap_counter = 1;
   vring->used_wrap_counter = 1;
 
@@ -650,7 +651,7 @@ virtio_pci_control_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
 
   virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
 		    queue_size);
-  vif->virtio_pci_func->setup_queue (vm, vif, queue_num, (void *) vring);
+  vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring);
   vring->queue_notify_offset =
     vif->notify_off_multiplier *
     vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
@@ -665,8 +666,7 @@ virtio_pci_control_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
 {
   clib_error_t *error = 0;
   u16 queue_size = 0;
-  virtio_vring_t *vring;
-  vring_t vr;
+  vnet_virtio_vring_t *vring;
   u32 i = 0;
   void *ptr = NULL;
 
@@ -685,27 +685,20 @@ virtio_pci_control_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
 
   vec_validate_aligned (vif->cxq_vring, 0, CLIB_CACHE_LINE_BYTES);
   vring = vec_elt_at_index (vif->cxq_vring, 0);
-  i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
-  i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
-  ptr =
-    vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
-					vif->numa_node);
+  i = vnet_virtio_vring_size (queue_size, VNET_VIRTIO_PCI_VRING_ALIGN);
+  i = round_pow2 (i, VNET_VIRTIO_PCI_VRING_ALIGN);
+  ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_VIRTIO_PCI_VRING_ALIGN,
+					    vif->numa_node);
   if (!ptr)
     return vlib_physmem_last_error (vm);
   clib_memset (ptr, 0, i);
-  vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
-  vring->desc = vr.desc;
-  vring->avail = vr.avail;
-  vring->used = vr.used;
+  vnet_virtio_vring_init (vring, queue_size, ptr, VNET_VIRTIO_PCI_VRING_ALIGN);
   vring->queue_id = queue_num;
-  vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
 
   ASSERT (vring->buffers == 0);
-
-  vring->size = queue_size;
   virtio_log_debug (vif, "control-queue: number %u, size %u", queue_num,
 		    queue_size);
-  vif->virtio_pci_func->setup_queue (vm, vif, queue_num, ptr);
+  vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring);
   vring->queue_notify_offset =
     vif->notify_off_multiplier *
     vif->virtio_pci_func->get_queue_notify_off (vm, vif, queue_num);
@@ -731,8 +724,7 @@ virtio_pci_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
 {
   clib_error_t *error = 0;
   u16 queue_size = 0;
-  virtio_vring_t *vring;
-  vring_t vr;
+  vnet_virtio_vring_t *vring;
   u32 i = 0;
   void *ptr = NULL;
 
@@ -762,18 +754,14 @@ virtio_pci_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
 			    CLIB_CACHE_LINE_BYTES);
       vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
     }
-  i = vring_size (queue_size, VIRTIO_PCI_VRING_ALIGN);
-  i = round_pow2 (i, VIRTIO_PCI_VRING_ALIGN);
-  ptr =
-    vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
-					vif->numa_node);
+  i = vnet_virtio_vring_size (queue_size, VNET_VIRTIO_PCI_VRING_ALIGN);
+  i = round_pow2 (i, VNET_VIRTIO_PCI_VRING_ALIGN);
+  ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_VIRTIO_PCI_VRING_ALIGN,
+					    vif->numa_node);
   if (!ptr)
     return vlib_physmem_last_error (vm);
   clib_memset (ptr, 0, i);
-  vring_init (&vr, queue_size, ptr, VIRTIO_PCI_VRING_ALIGN);
-  vring->desc = vr.desc;
-  vring->avail = vr.avail;
-  vring->used = vr.used;
+  vnet_virtio_vring_init (vring, queue_size, ptr, VNET_VIRTIO_PCI_VRING_ALIGN);
   vring->queue_id = queue_num;
   vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
   vring->flow_table = 0;
@@ -791,8 +779,8 @@ virtio_pci_vring_split_init (vlib_main_t * vm, virtio_if_t * vif,
       virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
 			queue_size);
     }
-  vring->size = queue_size;
-  if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, ptr))
+  vring->queue_size = queue_size;
+  if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring))
     return clib_error_return (0, "error in queue address setup");
 
   vring->queue_notify_offset =
@@ -809,7 +797,7 @@ virtio_pci_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
 {
   clib_error_t *error = 0;
   u16 queue_size = 0;
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   u32 i = 0;
   void *ptr = NULL;
 
@@ -835,29 +823,30 @@ virtio_pci_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
       vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (queue_num));
     }
 
-  i =
-    (((queue_size * sizeof (vring_packed_desc_t)) +
-      sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
-      1) & ~(VIRTIO_PCI_VRING_ALIGN - 1)) + sizeof (vring_desc_event_t);
+  i = (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
+	sizeof (vnet_virtio_vring_desc_event_t) + VNET_VIRTIO_PCI_VRING_ALIGN -
+	1) &
+       ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1)) +
+      sizeof (vnet_virtio_vring_desc_event_t);
 
-  ptr =
-    vlib_physmem_alloc_aligned_on_numa (vm, i, VIRTIO_PCI_VRING_ALIGN,
-					vif->numa_node);
+  ptr = vlib_physmem_alloc_aligned_on_numa (vm, i, VNET_VIRTIO_PCI_VRING_ALIGN,
+					    vif->numa_node);
   if (!ptr)
     return vlib_physmem_last_error (vm);
 
   clib_memset (ptr, 0, i);
   vring->packed_desc = ptr;
 
-  vring->driver_event = ptr + (queue_size * sizeof (vring_packed_desc_t));
+  vring->driver_event =
+    ptr + (queue_size * sizeof (vnet_virtio_vring_packed_desc_t));
   vring->driver_event->off_wrap = 0;
   vring->driver_event->flags = VRING_EVENT_F_DISABLE;
 
   vring->device_event =
-    ptr +
-    (((queue_size * sizeof (vring_packed_desc_t)) +
-      sizeof (vring_desc_event_t) + VIRTIO_PCI_VRING_ALIGN -
-      1) & ~(VIRTIO_PCI_VRING_ALIGN - 1));
+    ptr + (((queue_size * sizeof (vnet_virtio_vring_packed_desc_t)) +
+	    sizeof (vnet_virtio_vring_desc_event_t) +
+	    VNET_VIRTIO_PCI_VRING_ALIGN - 1) &
+	   ~(VNET_VIRTIO_PCI_VRING_ALIGN - 1));
   vring->device_event->off_wrap = 0;
   vring->device_event->flags = 0;
 
@@ -879,8 +868,8 @@ virtio_pci_vring_packed_init (vlib_main_t * vm, virtio_if_t * vif,
       virtio_log_debug (vif, "rx-queue: number %u, size %u", queue_num,
 			queue_size);
     }
-  vring->size = queue_size;
-  if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, (void *) vring))
+  vring->queue_size = queue_size;
+  if (vif->virtio_pci_func->setup_queue (vm, vif, queue_num, vring))
     return clib_error_return (0, "error in queue address setup");
 
   vring->queue_notify_offset =
@@ -1553,7 +1542,7 @@ virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
 
   vec_foreach_index (i, vif->rxq_vrings)
   {
-    virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, i);
+    vnet_virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, i);
     if (vring->used)
       {
 	virtio_free_buffers (vm, vring);
@@ -1566,7 +1555,7 @@ virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif)
 
   vec_foreach_index (i, vif->txq_vrings)
   {
-    virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, i);
+    vnet_virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, i);
     if (vring->used)
       {
 	virtio_free_buffers (vm, vring);
diff --git a/src/vnet/devices/virtio/pci.h b/src/vnet/devices/virtio/pci.h
index 70aa9833c2d..db20537bc3f 100644
--- a/src/vnet/devices/virtio/pci.h
+++ b/src/vnet/devices/virtio/pci.h
@@ -87,7 +87,7 @@ typedef enum
 
 #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
 
-#define VIRTIO_PCI_VRING_ALIGN 4096
+#define VNET_VIRTIO_PCI_VRING_ALIGN 4096
 
 typedef enum
 {
@@ -192,8 +192,8 @@ typedef struct _virtio_pci_func
     u16 (*get_queue_size) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id);
   void (*set_queue_size) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id,
 			  u16 queue_size);
-    u8 (*setup_queue) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id,
-		       void *p);
+  u8 (*setup_queue) (vlib_main_t *vm, virtio_if_t *vif, u16 queue_id,
+		     vnet_virtio_vring_t *vring);
   void (*del_queue) (vlib_main_t * vm, virtio_if_t * vif, u16 queue_id);
     u16 (*get_queue_notify_off) (vlib_main_t * vm, virtio_if_t * vif,
 				 u16 queue_id);
diff --git a/src/vnet/devices/virtio/vhost_user.c b/src/vnet/devices/virtio/vhost_user.c
index 0d24ad5aec8..9c585722b48 100644
--- a/src/vnet/devices/virtio/vhost_user.c
+++ b/src/vnet/devices/virtio/vhost_user.c
@@ -689,9 +689,12 @@ vhost_user_socket_read (clib_file_t * uf)
 	  goto close_socket;
 	}
 
-      vring_desc_t *desc = map_user_mem (vui, msg.addr.desc_user_addr);
-      vring_used_t *used = map_user_mem (vui, msg.addr.used_user_addr);
-      vring_avail_t *avail = map_user_mem (vui, msg.addr.avail_user_addr);
+      vnet_virtio_vring_desc_t *desc =
+	map_user_mem (vui, msg.addr.desc_user_addr);
+      vnet_virtio_vring_used_t *used =
+	map_user_mem (vui, msg.addr.used_user_addr);
+      vnet_virtio_vring_avail_t *avail =
+	map_user_mem (vui, msg.addr.avail_user_addr);
 
       if ((desc == NULL) || (used == NULL) || (avail == NULL))
 	{
@@ -1930,7 +1933,8 @@ format_vhost_user_desc (u8 * s, va_list * args)
 {
   char *fmt = va_arg (*args, char *);
   vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
-  vring_desc_t *desc_table = va_arg (*args, vring_desc_t *);
+  vnet_virtio_vring_desc_t *desc_table =
+    va_arg (*args, vnet_virtio_vring_desc_t *);
   int idx = va_arg (*args, int);
   u32 *mem_hint = va_arg (*args, u32 *);
 
@@ -1959,7 +1963,7 @@ vhost_user_show_desc (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
   u32 mem_hint = 0;
   u32 idx;
   u32 n_entries;
-  vring_desc_t *desc_table;
+  vnet_virtio_vring_desc_t *desc_table;
   vhost_user_vring_t *vq = &vui->vrings[q];
 
   if (vq->avail && vq->used)
@@ -1989,7 +1993,8 @@ vhost_user_show_desc (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
 			   desc_table, j, &mem_hint);
 	  if (show_verbose && (desc_table[j].flags & VRING_DESC_F_INDIRECT))
 	    {
-	      n_entries = desc_table[j].len / sizeof (vring_desc_t);
+	      n_entries =
+		desc_table[j].len / sizeof (vnet_virtio_vring_desc_t);
 	      desc_table = map_guest_mem (vui, desc_table[j].addr, &mem_hint);
 	      if (desc_table)
 		{
@@ -2014,7 +2019,8 @@ format_vhost_user_packed_desc (u8 * s, va_list * args)
 {
   char *fmt = va_arg (*args, char *);
   vhost_user_intf_t *vui = va_arg (*args, vhost_user_intf_t *);
-  vring_packed_desc_t *desc_table = va_arg (*args, vring_packed_desc_t *);
+  vnet_virtio_vring_packed_desc_t *desc_table =
+    va_arg (*args, vnet_virtio_vring_packed_desc_t *);
   int idx = va_arg (*args, int);
   u32 *mem_hint = va_arg (*args, u32 *);
 
@@ -2056,7 +2062,7 @@ vhost_user_show_desc_packed (vlib_main_t * vm, vhost_user_intf_t * vui, int q,
   u32 mem_hint = 0;
   u32 idx;
   u32 n_entries;
-  vring_packed_desc_t *desc_table;
+  vnet_virtio_vring_packed_desc_t *desc_table;
   vhost_user_vring_t *vq = &vui->vrings[q];
   u16 off_wrap, event_idx;
 
diff --git a/src/vnet/devices/virtio/vhost_user.h b/src/vnet/devices/virtio/vhost_user.h
index 59db5b4c592..f44951e030a 100644
--- a/src/vnet/devices/virtio/vhost_user.h
+++ b/src/vnet/devices/virtio/vhost_user.h
@@ -186,18 +186,18 @@ typedef struct
   u16 n_since_last_int;
   union
   {
-    vring_desc_t *desc;
-    vring_packed_desc_t *packed_desc;
+    vnet_virtio_vring_desc_t *desc;
+    vnet_virtio_vring_packed_desc_t *packed_desc;
   };
   union
   {
-    vring_avail_t *avail;
-    vring_desc_event_t *avail_event;
+    vnet_virtio_vring_avail_t *avail;
+    vnet_virtio_vring_desc_event_t *avail_event;
   };
   union
   {
-    vring_used_t *used;
-    vring_desc_event_t *used_event;
+    vnet_virtio_vring_used_t *used;
+    vnet_virtio_vring_desc_event_t *used_event;
   };
   uword desc_user_addr;
   uword used_user_addr;
@@ -306,7 +306,7 @@ typedef struct
   u16 device_index; /** The device index */
   u32 virtio_ring_flags; /** Runtime queue flags  **/
   u16 first_desc_len; /** Length of the first data descriptor **/
-  virtio_net_hdr_mrg_rxbuf_t hdr; /** Virtio header **/
+  vnet_virtio_net_hdr_mrg_rxbuf_t hdr; /** Virtio header **/
 } vhost_trace_t;
 
 #define VHOST_USER_RX_BUFFERS_N (2 * VLIB_FRAME_SIZE + 2)
@@ -317,7 +317,7 @@ typedef struct
   u32 rx_buffers_len;
   u32 rx_buffers[VHOST_USER_RX_BUFFERS_N];
 
-  virtio_net_hdr_mrg_rxbuf_t tx_headers[VLIB_FRAME_SIZE];
+  vnet_virtio_net_hdr_mrg_rxbuf_t tx_headers[VLIB_FRAME_SIZE];
   vhost_copy_t copy[VHOST_USER_COPY_ARRAY_N];
 
   /* This is here so it doesn't end-up
diff --git a/src/vnet/devices/virtio/vhost_user_inline.h b/src/vnet/devices/virtio/vhost_user_inline.h
index 5297453c317..8bdff3733a7 100644
--- a/src/vnet/devices/virtio/vhost_user_inline.h
+++ b/src/vnet/devices/virtio/vhost_user_inline.h
@@ -199,12 +199,15 @@ vhost_user_log_dirty_pages_2 (vhost_user_intf_t * vui,
     }
 }
 
-
-#define vhost_user_log_dirty_ring(vui, vq, member) \
-  if (PREDICT_FALSE(vq->log_used)) { \
-    vhost_user_log_dirty_pages_2(vui, vq->log_guest_addr + STRUCT_OFFSET_OF(vring_used_t, member), \
-                             sizeof(vq->used->member), 0); \
-  }
+#define vhost_user_log_dirty_ring(vui, vq, member)                            \
+  if (PREDICT_FALSE (vq->log_used))                                           \
+    {                                                                         \
+      vhost_user_log_dirty_pages_2 (                                          \
+	vui,                                                                  \
+	vq->log_guest_addr +                                                  \
+	  STRUCT_OFFSET_OF (vnet_virtio_vring_used_t, member),                \
+	sizeof (vq->used->member), 0);                                        \
+    }
 
 static_always_inline u8 *
 format_vhost_trace (u8 * s, va_list * va)
@@ -425,7 +428,7 @@ vhost_user_advance_last_avail_table_idx (vhost_user_intf_t * vui,
 {
   if (chained)
     {
-      vring_packed_desc_t *desc_table = vring->packed_desc;
+      vnet_virtio_vring_packed_desc_t *desc_table = vring->packed_desc;
 
       /* pick up the slot of the next avail idx */
       while (desc_table[vring->last_avail_idx & vring->qsz_mask].flags &
@@ -449,9 +452,9 @@ vhost_user_undo_advanced_last_avail_idx (vhost_user_vring_t * vring)
 }
 
 static_always_inline void
-vhost_user_dequeue_descs (vhost_user_vring_t * rxvq,
-			  virtio_net_hdr_mrg_rxbuf_t * hdr,
-			  u16 * n_descs_processed)
+vhost_user_dequeue_descs (vhost_user_vring_t *rxvq,
+			  vnet_virtio_net_hdr_mrg_rxbuf_t *hdr,
+			  u16 *n_descs_processed)
 {
   u16 i;
 
diff --git a/src/vnet/devices/virtio/vhost_user_input.c b/src/vnet/devices/virtio/vhost_user_input.c
index ffa2d374abf..841a9798212 100644
--- a/src/vnet/devices/virtio/vhost_user_input.c
+++ b/src/vnet/devices/virtio/vhost_user_input.c
@@ -102,8 +102,8 @@ vhost_user_rx_trace (vhost_trace_t * t,
 {
   vhost_user_main_t *vum = &vhost_user_main;
   u32 desc_current = txvq->avail->ring[last_avail_idx & txvq->qsz_mask];
-  vring_desc_t *hdr_desc = 0;
-  virtio_net_hdr_mrg_rxbuf_t *hdr;
+  vnet_virtio_vring_desc_t *hdr_desc = 0;
+  vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
   u32 hint = 0;
 
   clib_memset (t, 0, sizeof (*t));
@@ -249,8 +249,8 @@ vhost_user_input_rewind_buffers (vlib_main_t * vm,
 }
 
 static_always_inline void
-vhost_user_handle_rx_offload (vlib_buffer_t * b0, u8 * b0_data,
-			      virtio_net_hdr_t * hdr)
+vhost_user_handle_rx_offload (vlib_buffer_t *b0, u8 *b0_data,
+			      vnet_virtio_net_hdr_t *hdr)
 {
   u8 l4_hdr_sz = 0;
   u8 l4_proto = 0;
@@ -517,7 +517,7 @@ vhost_user_if_input (vlib_main_t *vm, vhost_user_main_t *vum,
       u32 bi_current;
       u16 desc_current;
       u32 desc_data_offset;
-      vring_desc_t *desc_table = txvq->desc;
+      vnet_virtio_vring_desc_t *desc_table = txvq->desc;
 
       if (PREDICT_FALSE (cpu->rx_buffers_len <= 1))
 	{
@@ -580,7 +580,7 @@ vhost_user_if_input (vlib_main_t *vm, vhost_user_main_t *vum,
 
       if (enable_csum)
 	{
-	  virtio_net_hdr_mrg_rxbuf_t *hdr;
+	  vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
 	  u8 *b_data;
 	  u16 current;
 
@@ -769,7 +769,7 @@ vhost_user_mark_desc_consumed (vhost_user_intf_t * vui,
 			       vhost_user_vring_t * txvq, u16 desc_head,
 			       u16 n_descs_processed)
 {
-  vring_packed_desc_t *desc_table = txvq->packed_desc;
+  vnet_virtio_vring_packed_desc_t *desc_table = txvq->packed_desc;
   u16 desc_idx;
   u16 mask = txvq->qsz_mask;
 
@@ -791,8 +791,8 @@ vhost_user_rx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui,
 			    u16 desc_current)
 {
   vhost_user_main_t *vum = &vhost_user_main;
-  vring_packed_desc_t *hdr_desc;
-  virtio_net_hdr_mrg_rxbuf_t *hdr;
+  vnet_virtio_vring_packed_desc_t *hdr_desc;
+  vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
   u32 hint = 0;
 
   clib_memset (t, 0, sizeof (*t));
@@ -923,12 +923,13 @@ one_by_one:
 }
 
 static_always_inline u32
-vhost_user_do_offload (vhost_user_intf_t * vui,
-		       vring_packed_desc_t * desc_table, u16 desc_current,
-		       u16 mask, vlib_buffer_t * b_head, u32 * map_hint)
+vhost_user_do_offload (vhost_user_intf_t *vui,
+		       vnet_virtio_vring_packed_desc_t *desc_table,
+		       u16 desc_current, u16 mask, vlib_buffer_t *b_head,
+		       u32 *map_hint)
 {
   u32 rc = VHOST_USER_INPUT_FUNC_ERROR_NO_ERROR;
-  virtio_net_hdr_mrg_rxbuf_t *hdr;
+  vnet_virtio_net_hdr_mrg_rxbuf_t *hdr;
   u8 *b_data;
   u32 desc_data_offset = vui->virtio_net_hdr_sz;
 
@@ -989,7 +990,7 @@ vhost_user_compute_indirect_desc_len (vhost_user_intf_t * vui,
 				      u32 buffer_data_size, u16 desc_current,
 				      u32 * map_hint)
 {
-  vring_packed_desc_t *desc_table = txvq->packed_desc;
+  vnet_virtio_vring_packed_desc_t *desc_table = txvq->packed_desc;
   u32 desc_len = 0;
   u16 desc_data_offset = vui->virtio_net_hdr_sz;
   u16 desc_idx = desc_current;
@@ -1015,7 +1016,7 @@ vhost_user_compute_chained_desc_len (vhost_user_intf_t * vui,
 				     u32 buffer_data_size, u16 * current,
 				     u16 * n_left)
 {
-  vring_packed_desc_t *desc_table = txvq->packed_desc;
+  vnet_virtio_vring_packed_desc_t *desc_table = txvq->packed_desc;
   u32 desc_len = 0;
   u16 mask = txvq->qsz_mask;
 
@@ -1038,14 +1039,13 @@ vhost_user_compute_chained_desc_len (vhost_user_intf_t * vui,
 }
 
 static_always_inline void
-vhost_user_assemble_packet (vring_packed_desc_t * desc_table,
-			    u16 * desc_idx, vlib_buffer_t * b_head,
-			    vlib_buffer_t ** b_current, u32 ** next,
-			    vlib_buffer_t *** b, u32 * bi_current,
-			    vhost_cpu_t * cpu, u16 * copy_len,
-			    u32 * buffers_used, u32 buffers_required,
-			    u32 * desc_data_offset, u32 buffer_data_size,
-			    u16 mask)
+vhost_user_assemble_packet (vnet_virtio_vring_packed_desc_t *desc_table,
+			    u16 *desc_idx, vlib_buffer_t *b_head,
+			    vlib_buffer_t **b_current, u32 **next,
+			    vlib_buffer_t ***b, u32 *bi_current,
+			    vhost_cpu_t *cpu, u16 *copy_len, u32 *buffers_used,
+			    u32 buffers_required, u32 *desc_data_offset,
+			    u32 buffer_data_size, u16 mask)
 {
   u32 desc_data_l;
 
@@ -1108,7 +1108,7 @@ vhost_user_if_input_packed (vlib_main_t *vm, vhost_user_main_t *vum,
   u32 current_config_index = ~0;
   u16 mask = txvq->qsz_mask;
   u16 desc_current, desc_head, last_used_idx;
-  vring_packed_desc_t *desc_table = 0;
+  vnet_virtio_vring_packed_desc_t *desc_table = 0;
   u32 n_descs_processed = 0;
   u32 rv;
   vlib_buffer_t **b;
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
index 15e39a11692..3b7bf97c3f8 100644
--- a/src/vnet/devices/virtio/vhost_user_output.c
+++ b/src/vnet/devices/virtio/vhost_user_output.c
@@ -127,7 +127,7 @@ vhost_user_tx_trace (vhost_trace_t * t,
   vhost_user_main_t *vum = &vhost_user_main;
   u32 last_avail_idx = rxvq->last_avail_idx;
   u32 desc_current = rxvq->avail->ring[last_avail_idx & rxvq->qsz_mask];
-  vring_desc_t *hdr_desc = 0;
+  vnet_virtio_vring_desc_t *hdr_desc = 0;
   u32 hint = 0;
 
   clib_memset (t, 0, sizeof (*t));
@@ -202,8 +202,8 @@ vhost_user_tx_copy (vhost_user_intf_t * vui, vhost_copy_t * cpy,
 }
 
 static_always_inline void
-vhost_user_handle_tx_offload (vhost_user_intf_t * vui, vlib_buffer_t * b,
-			      virtio_net_hdr_t * hdr)
+vhost_user_handle_tx_offload (vhost_user_intf_t *vui, vlib_buffer_t *b,
+			      vnet_virtio_net_hdr_t *hdr)
 {
   generic_header_offset_t gho = { 0 };
   int is_ip4 = b->flags & VNET_BUFFER_F_IS_IP4;
@@ -282,7 +282,7 @@ vhost_user_mark_desc_available (vlib_main_t * vm, vhost_user_intf_t * vui,
 				vlib_frame_t * frame, u32 n_left)
 {
   u16 desc_idx, flags;
-  vring_packed_desc_t *desc_table = rxvq->packed_desc;
+  vnet_virtio_vring_packed_desc_t *desc_table = rxvq->packed_desc;
   u16 last_used_idx = rxvq->last_used_idx;
 
   if (PREDICT_FALSE (*n_descs_processed == 0))
@@ -314,7 +314,7 @@ vhost_user_mark_desc_available (vlib_main_t * vm, vhost_user_intf_t * vui,
 
   if (chained)
     {
-      vring_packed_desc_t *desc_table = rxvq->packed_desc;
+      vnet_virtio_vring_packed_desc_t *desc_table = rxvq->packed_desc;
 
       while (desc_table[rxvq->last_used_idx & rxvq->qsz_mask].flags &
 	     VRING_DESC_F_NEXT)
@@ -344,7 +344,7 @@ vhost_user_tx_trace_packed (vhost_trace_t * t, vhost_user_intf_t * vui,
   vhost_user_main_t *vum = &vhost_user_main;
   u32 last_avail_idx = rxvq->last_avail_idx;
   u32 desc_current = last_avail_idx & rxvq->qsz_mask;
-  vring_packed_desc_t *hdr_desc = 0;
+  vnet_virtio_vring_packed_desc_t *hdr_desc = 0;
   u32 hint = 0;
 
   clib_memset (t, 0, sizeof (*t));
@@ -388,7 +388,7 @@ vhost_user_device_class_packed (vlib_main_t *vm, vlib_node_runtime_t *node,
   u8 retry = 8;
   u16 copy_len;
   u16 tx_headers_len;
-  vring_packed_desc_t *desc_table;
+  vnet_virtio_vring_packed_desc_t *desc_table;
   u32 or_flags;
   u16 desc_head, desc_index, desc_len;
   u16 n_descs_processed;
@@ -438,7 +438,7 @@ retry:
 	{
 	  indirect = 1;
 	  if (PREDICT_FALSE (desc_table[desc_head].len <
-			     sizeof (vring_packed_desc_t)))
+			     sizeof (vnet_virtio_vring_packed_desc_t)))
 	    {
 	      error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
 	      goto done;
@@ -461,7 +461,7 @@ retry:
       buffer_len = desc_table[desc_index].len;
 
       /* Get a header from the header array */
-      virtio_net_hdr_mrg_rxbuf_t *hdr = &cpu->tx_headers[tx_headers_len];
+      vnet_virtio_net_hdr_mrg_rxbuf_t *hdr = &cpu->tx_headers[tx_headers_len];
       tx_headers_len++;
       hdr->hdr.flags = 0;
       hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
@@ -545,7 +545,7 @@ retry:
 		   * MRG is available
 		   * This is the default setting for the guest VM
 		   */
-		  virtio_net_hdr_mrg_rxbuf_t *hdr =
+		  vnet_virtio_net_hdr_mrg_rxbuf_t *hdr =
 		    &cpu->tx_headers[tx_headers_len - 1];
 
 		  desc_table[desc_index].len = desc_len;
@@ -742,7 +742,7 @@ retry:
     {
       vlib_buffer_t *b0, *current_b0;
       u16 desc_head, desc_index, desc_len;
-      vring_desc_t *desc_table;
+      vnet_virtio_vring_desc_t *desc_table;
       uword buffer_map_addr;
       u32 buffer_len;
       u16 bytes_left;
@@ -773,8 +773,8 @@ retry:
        * I don't know of any driver providing indirect for RX. */
       if (PREDICT_FALSE (rxvq->desc[desc_head].flags & VRING_DESC_F_INDIRECT))
 	{
-	  if (PREDICT_FALSE
-	      (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
+	  if (PREDICT_FALSE (rxvq->desc[desc_head].len <
+			     sizeof (vnet_virtio_vring_desc_t)))
 	    {
 	      error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
 	      goto done;
@@ -796,7 +796,8 @@ retry:
 
       {
 	// Get a header from the header array
-	virtio_net_hdr_mrg_rxbuf_t *hdr = &cpu->tx_headers[tx_headers_len];
+	vnet_virtio_net_hdr_mrg_rxbuf_t *hdr =
+	  &cpu->tx_headers[tx_headers_len];
 	tx_headers_len++;
 	hdr->hdr.flags = 0;
 	hdr->hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
@@ -835,7 +836,7 @@ retry:
 		}
 	      else if (vui->virtio_net_hdr_sz == 12)	//MRG is available
 		{
-		  virtio_net_hdr_mrg_rxbuf_t *hdr =
+		  vnet_virtio_net_hdr_mrg_rxbuf_t *hdr =
 		    &cpu->tx_headers[tx_headers_len - 1];
 
 		  //Move from available to used buffer
@@ -870,8 +871,8 @@ retry:
 		    {
 		      //It is seriously unlikely that a driver will put indirect descriptor
 		      //after non-indirect descriptor.
-		      if (PREDICT_FALSE
-			  (rxvq->desc[desc_head].len < sizeof (vring_desc_t)))
+		      if (PREDICT_FALSE (rxvq->desc[desc_head].len <
+					 sizeof (vnet_virtio_vring_desc_t)))
 			{
 			  error = VHOST_USER_TX_FUNC_ERROR_INDIRECT_OVERFLOW;
 			  goto done;
diff --git a/src/vnet/devices/virtio/virtio.c b/src/vnet/devices/virtio/virtio.c
index bbca81c2d02..ee149350a70 100644
--- a/src/vnet/devices/virtio/virtio.c
+++ b/src/vnet/devices/virtio/virtio.c
@@ -60,7 +60,7 @@ call_read_ready (clib_file_t * uf)
 clib_error_t *
 virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, u16 sz)
 {
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   int i;
 
   if (!is_pow2 (sz))
@@ -85,19 +85,20 @@ virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, u16 sz)
 			    CLIB_CACHE_LINE_BYTES);
       vring = vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (idx));
     }
-  i = sizeof (vring_desc_t) * sz;
+  i = sizeof (vnet_virtio_vring_desc_t) * sz;
   i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
   vring->desc = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
   clib_memset (vring->desc, 0, i);
 
-  i = sizeof (vring_avail_t) + sz * sizeof (vring->avail->ring[0]);
+  i = sizeof (vnet_virtio_vring_avail_t) + sz * sizeof (vring->avail->ring[0]);
   i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
   vring->avail = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
   clib_memset (vring->avail, 0, i);
   // tell kernel that we don't need interrupt
   vring->avail->flags = VRING_AVAIL_F_NO_INTERRUPT;
 
-  i = sizeof (vring_used_t) + sz * sizeof (vring_used_elem_t);
+  i = sizeof (vnet_virtio_vring_used_t) +
+      sz * sizeof (vnet_virtio_vring_used_elem_t);
   i = round_pow2 (i, CLIB_CACHE_LINE_BYTES);
   vring->used = clib_mem_alloc_aligned (i, CLIB_CACHE_LINE_BYTES);
   clib_memset (vring->used, 0, i);
@@ -115,20 +116,20 @@ virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx, u16 sz)
   else
     vring->call_fd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
 
-  vring->size = sz;
+  vring->queue_size = sz;
   vring->kick_fd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
   virtio_log_debug (vif, "vring %u size %u call_fd %d kick_fd %d", idx,
-		    vring->size, vring->call_fd, vring->kick_fd);
+		    vring->queue_size, vring->call_fd, vring->kick_fd);
 
   return 0;
 }
 
 inline void
-virtio_free_buffers (vlib_main_t * vm, virtio_vring_t * vring)
+virtio_free_buffers (vlib_main_t *vm, vnet_virtio_vring_t *vring)
 {
   u16 used = vring->desc_in_use;
   u16 last = vring->last_used_idx;
-  u16 mask = vring->size - 1;
+  u16 mask = vring->queue_size - 1;
 
   while (used)
     {
@@ -141,7 +142,7 @@ virtio_free_buffers (vlib_main_t * vm, virtio_vring_t * vring)
 clib_error_t *
 virtio_vring_free_rx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
 {
-  virtio_vring_t *vring =
+  vnet_virtio_vring_t *vring =
     vec_elt_at_index (vif->rxq_vrings, RX_QUEUE_ACCESS (idx));
 
   clib_file_del_by_index (&file_main, vring->call_file_index);
@@ -163,7 +164,7 @@ virtio_vring_free_rx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
 clib_error_t *
 virtio_vring_free_tx (vlib_main_t * vm, virtio_if_t * vif, u32 idx)
 {
-  virtio_vring_t *vring =
+  vnet_virtio_vring_t *vring =
     vec_elt_at_index (vif->txq_vrings, TX_QUEUE_ACCESS (idx));
 
   close (vring->kick_fd);
@@ -188,7 +189,7 @@ virtio_set_packet_coalesce (virtio_if_t * vif)
 {
   vnet_main_t *vnm = vnet_get_main ();
   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   vif->packet_coalesce = 1;
   vec_foreach (vring, vif->txq_vrings)
   {
@@ -203,7 +204,7 @@ virtio_set_packet_buffering (virtio_if_t * vif, u16 buffering_size)
 {
   vnet_main_t *vnm = vnet_get_main ();
   vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   clib_error_t *error = 0;
   vif->packet_buffering = 1;
 
@@ -221,7 +222,8 @@ virtio_set_packet_buffering (virtio_if_t * vif, u16 buffering_size)
 }
 
 static void
-virtio_vring_fill (vlib_main_t *vm, virtio_if_t *vif, virtio_vring_t *vring)
+virtio_vring_fill (vlib_main_t *vm, virtio_if_t *vif,
+		   vnet_virtio_vring_t *vring)
 {
   if (vif->is_packed)
     virtio_refill_vring_packed (vm, vif, vif->type, vring,
@@ -237,7 +239,7 @@ void
 virtio_vring_set_rx_queues (vlib_main_t *vm, virtio_if_t *vif)
 {
   vnet_main_t *vnm = vnet_get_main ();
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   u32 i = 0;
 
   vnet_hw_if_set_input_node (vnm, vif->hw_if_index, virtio_input_node.index);
@@ -287,7 +289,7 @@ void
 virtio_vring_set_tx_queues (vlib_main_t *vm, virtio_if_t *vif)
 {
   vnet_main_t *vnm = vnet_get_main ();
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
 
   vec_foreach (vring, vif->txq_vrings)
     {
@@ -316,9 +318,9 @@ virtio_set_net_hdr_size (virtio_if_t * vif)
 {
   if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MRG_RXBUF) ||
       vif->features & VIRTIO_FEATURE (VIRTIO_F_VERSION_1))
-    vif->virtio_net_hdr_sz = sizeof (virtio_net_hdr_v1_t);
+    vif->virtio_net_hdr_sz = sizeof (vnet_virtio_net_hdr_v1_t);
   else
-    vif->virtio_net_hdr_sz = sizeof (virtio_net_hdr_t);
+    vif->virtio_net_hdr_sz = sizeof (vnet_virtio_net_hdr_t);
 }
 
 inline void
@@ -329,7 +331,7 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
   virtio_if_t *vif;
   vnet_main_t *vnm = &vnet_main;
   virtio_main_t *mm = &virtio_main;
-  virtio_vring_t *vring;
+  vnet_virtio_vring_t *vring;
   struct feat_struct
   {
     u8 bit;
@@ -442,10 +444,10 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
       {
 	vring = vec_elt_at_index (vif->rxq_vrings, i);
 	vlib_cli_output (vm, "  Virtqueue (RX) %d", vring->queue_id);
-	vlib_cli_output (vm,
-			 "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
-			 vring->size, vring->last_used_idx, vring->desc_next,
-			 vring->desc_in_use);
+	vlib_cli_output (
+	  vm, "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
+	  vring->queue_size, vring->last_used_idx, vring->desc_next,
+	  vring->desc_in_use);
 	if (vif->is_packed)
 	  {
 	    vlib_cli_output (vm,
@@ -476,11 +478,12 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 			     "   id          addr         len  flags  next/id      user_addr\n");
 	    vlib_cli_output (vm,
 			     "  ===== ================== ===== ====== ======= ==================\n");
-	    for (j = 0; j < vring->size; j++)
+	    for (j = 0; j < vring->queue_size; j++)
 	      {
 		if (vif->is_packed)
 		  {
-		    vring_packed_desc_t *desc = &vring->packed_desc[j];
+		    vnet_virtio_vring_packed_desc_t *desc =
+		      &vring->packed_desc[j];
 		    vlib_cli_output (vm,
 				     "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
 				     j, desc->addr,
@@ -489,7 +492,7 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 		  }
 		else
 		  {
-		    vring_desc_t *desc = &vring->desc[j];
+		    vnet_virtio_vring_desc_t *desc = &vring->desc[j];
 		    vlib_cli_output (vm,
 				     "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
 				     j, desc->addr,
@@ -503,10 +506,10 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
       {
 	vring = vec_elt_at_index (vif->txq_vrings, i);
 	vlib_cli_output (vm, "  Virtqueue (TX) %d", vring->queue_id);
-	vlib_cli_output (vm,
-			 "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
-			 vring->size, vring->last_used_idx, vring->desc_next,
-			 vring->desc_in_use);
+	vlib_cli_output (
+	  vm, "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
+	  vring->queue_size, vring->last_used_idx, vring->desc_next,
+	  vring->desc_in_use);
 	if (vif->is_packed)
 	  {
 	    vlib_cli_output (vm,
@@ -547,11 +550,12 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 			     "   id          addr         len  flags  next/id      user_addr\n");
 	    vlib_cli_output (vm,
 			     "  ===== ================== ===== ====== ======== ==================\n");
-	    for (j = 0; j < vring->size; j++)
+	    for (j = 0; j < vring->queue_size; j++)
 	      {
 		if (vif->is_packed)
 		  {
-		    vring_packed_desc_t *desc = &vring->packed_desc[j];
+		    vnet_virtio_vring_packed_desc_t *desc =
+		      &vring->packed_desc[j];
 		    vlib_cli_output (vm,
 				     "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
 				     j, desc->addr,
@@ -560,7 +564,7 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 		  }
 		else
 		  {
-		    vring_desc_t *desc = &vring->desc[j];
+		    vnet_virtio_vring_desc_t *desc = &vring->desc[j];
 		    vlib_cli_output (vm,
 				     "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
 				     j, desc->addr,
@@ -575,10 +579,10 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 	{
 	  vring = vif->cxq_vring;
 	  vlib_cli_output (vm, "  Virtqueue (CTRL) %d", vring->queue_id);
-	  vlib_cli_output (vm,
-			   "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
-			   vring->size, vring->last_used_idx,
-			   vring->desc_next, vring->desc_in_use);
+	  vlib_cli_output (
+	    vm, "    qsz %d, last_used_idx %d, desc_next %d, desc_in_use %d",
+	    vring->queue_size, vring->last_used_idx, vring->desc_next,
+	    vring->desc_in_use);
 	  if (vif->is_packed)
 	    {
 	      vlib_cli_output (vm,
@@ -606,11 +610,12 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 			       "   id          addr         len  flags  next/id      user_addr\n");
 	      vlib_cli_output (vm,
 			       "  ===== ================== ===== ====== ======== ==================\n");
-	      for (j = 0; j < vring->size; j++)
+	      for (j = 0; j < vring->queue_size; j++)
 		{
 		  if (vif->is_packed)
 		    {
-		      vring_packed_desc_t *desc = &vring->packed_desc[j];
+		      vnet_virtio_vring_packed_desc_t *desc =
+			&vring->packed_desc[j];
 		      vlib_cli_output (vm,
 				       "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
 				       j, desc->addr,
@@ -619,7 +624,7 @@ virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 		    }
 		  else
 		    {
-		      vring_desc_t *desc = &vring->desc[j];
+		      vnet_virtio_vring_desc_t *desc = &vring->desc[j];
 		      vlib_cli_output (vm,
 				       "  %-5d 0x%016lx %-5d 0x%04x %-8d 0x%016lx\n",
 				       j, desc->addr,
diff --git a/src/vnet/devices/virtio/virtio.h b/src/vnet/devices/virtio/virtio.h
index 3784a1bf2e9..e12198c3bf8 100644
--- a/src/vnet/devices/virtio/virtio.h
+++ b/src/vnet/devices/virtio/virtio.h
@@ -69,19 +69,19 @@ typedef struct
   {
     struct
     {
-      vring_desc_t *desc;
-      vring_used_t *used;
-      vring_avail_t *avail;
+      vnet_virtio_vring_desc_t *desc;
+      vnet_virtio_vring_used_t *used;
+      vnet_virtio_vring_avail_t *avail;
     };
     struct
     {
-      vring_packed_desc_t *packed_desc;
-      vring_desc_event_t *driver_event;
-      vring_desc_event_t *device_event;
+      vnet_virtio_vring_packed_desc_t *packed_desc;
+      vnet_virtio_vring_desc_event_t *driver_event;
+      vnet_virtio_vring_desc_event_t *device_event;
     };
   };
   u32 *buffers;
-  u16 size;
+  u16 queue_size;
   u16 queue_id;
   u32 queue_index;
   u16 desc_in_use;
@@ -110,7 +110,7 @@ typedef struct
   vnet_hw_if_rx_mode mode;
   virtio_vring_buffering_t *buffering;
   gro_flow_table_t *flow_table;
-} virtio_vring_t;
+} vnet_virtio_vring_t;
 
 typedef union
 {
@@ -135,8 +135,8 @@ typedef struct
   u32 per_interface_next_index;
   u16 num_rxqs;
   u16 num_txqs;
-  virtio_vring_t *rxq_vrings;
-  virtio_vring_t *txq_vrings;
+  vnet_virtio_vring_t *rxq_vrings;
+  vnet_virtio_vring_t *txq_vrings;
   int gso_enabled;
   int csum_offload_enabled;
   union
@@ -194,7 +194,7 @@ typedef struct
     struct			/* native virtio */
     {
       void *bar;
-      virtio_vring_t *cxq_vring;
+      vnet_virtio_vring_t *cxq_vring;
       pci_addr_t pci_addr;
       u32 bar_id;
       u32 notify_off_multiplier;
@@ -235,7 +235,7 @@ clib_error_t *virtio_vring_free_tx (vlib_main_t * vm, virtio_if_t * vif,
 				    u32 idx);
 void virtio_vring_set_rx_queues (vlib_main_t *vm, virtio_if_t *vif);
 void virtio_vring_set_tx_queues (vlib_main_t *vm, virtio_if_t *vif);
-extern void virtio_free_buffers (vlib_main_t * vm, virtio_vring_t * vring);
+extern void virtio_free_buffers (vlib_main_t *vm, vnet_virtio_vring_t *vring);
 extern void virtio_set_net_hdr_size (virtio_if_t * vif);
 extern void virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 			 virtio_if_type_t type);
@@ -254,7 +254,7 @@ format_function_t format_virtio_device_name;
 format_function_t format_virtio_log_name;
 
 static_always_inline void
-virtio_kick (vlib_main_t * vm, virtio_vring_t * vring, virtio_if_t * vif)
+virtio_kick (vlib_main_t *vm, vnet_virtio_vring_t *vring, virtio_if_t *vif)
 {
   if (vif->type == VIRTIO_IF_TYPE_PCI)
     {
@@ -276,7 +276,7 @@ virtio_kick (vlib_main_t * vm, virtio_vring_t * vring, virtio_if_t * vif)
 }
 
 static_always_inline u8
-virtio_txq_is_scheduled (virtio_vring_t *vring)
+virtio_txq_is_scheduled (vnet_virtio_vring_t *vring)
 {
   if (vring)
     return (vring->flags & VRING_TX_SCHEDULED);
@@ -284,19 +284,47 @@ virtio_txq_is_scheduled (virtio_vring_t *vring)
 }
 
 static_always_inline void
-virtio_txq_set_scheduled (virtio_vring_t *vring)
+virtio_txq_set_scheduled (vnet_virtio_vring_t *vring)
 {
   if (vring)
     vring->flags |= VRING_TX_SCHEDULED;
 }
 
 static_always_inline void
-virtio_txq_clear_scheduled (virtio_vring_t *vring)
+virtio_txq_clear_scheduled (vnet_virtio_vring_t *vring)
 {
   if (vring)
     vring->flags &= ~VRING_TX_SCHEDULED;
 }
 
+static_always_inline void
+vnet_virtio_vring_init (vnet_virtio_vring_t *vring, u16 queue_size, void *p,
+			u32 align)
+{
+  vring->queue_size = queue_size;
+  vring->desc = p;
+  vring->avail =
+    (vnet_virtio_vring_avail_t *) ((char *) p +
+				   queue_size *
+				     sizeof (vnet_virtio_vring_desc_t));
+  vring->used =
+    (vnet_virtio_vring_used_t
+       *) ((char *) p + ((sizeof (vnet_virtio_vring_desc_t) * queue_size +
+			  sizeof (u16) * (3 + queue_size) + align - 1) &
+			 ~(align - 1)));
+  vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
+}
+
+static_always_inline u16
+vnet_virtio_vring_size (u16 queue_size, u32 align)
+{
+  return ((sizeof (vnet_virtio_vring_desc_t) * queue_size +
+	   sizeof (u16) * (3 + queue_size) + align - 1) &
+	  ~(align - 1)) +
+	 sizeof (u16) * 3 +
+	 sizeof (vnet_virtio_vring_used_elem_t) * queue_size;
+}
+
 #define virtio_log_debug(vif, f, ...)				\
 {								\
   vlib_log(VLIB_LOG_LEVEL_DEBUG, virtio_main.log_default,	\
diff --git a/src/vnet/devices/virtio/virtio_api.c b/src/vnet/devices/virtio/virtio_api.c
index 11514c75c59..3197a2fab6d 100644
--- a/src/vnet/devices/virtio/virtio_api.c
+++ b/src/vnet/devices/virtio/virtio_api.c
@@ -193,10 +193,10 @@ virtio_pci_send_sw_interface_details (vpe_api_main_t * am,
   pci_address_encode ((vlib_pci_addr_t *) & vif->pci_addr.as_u32,
 		      &mp->pci_addr);
   mp->sw_if_index = htonl (vif->sw_if_index);
-  virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, 0);
-  mp->rx_ring_sz = htons (vring->size);
+  vnet_virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, 0);
+  mp->rx_ring_sz = htons (vring->queue_size);
   vring = vec_elt_at_index (vif->txq_vrings, 0);
-  mp->tx_ring_sz = htons (vring->size);
+  mp->tx_ring_sz = htons (vring->queue_size);
   clib_memcpy (mp->mac_addr, vif->mac_addr, 6);
   mp->features = clib_host_to_net_u64 (vif->features);
 
diff --git a/src/vnet/devices/virtio/virtio_inline.h b/src/vnet/devices/virtio/virtio_inline.h
index 209817d48c7..179f319aa4c 100644
--- a/src/vnet/devices/virtio/virtio_inline.h
+++ b/src/vnet/devices/virtio/virtio_inline.h
@@ -29,11 +29,11 @@ typedef enum
 
 static_always_inline void
 virtio_refill_vring_split (vlib_main_t *vm, virtio_if_t *vif,
-			   virtio_if_type_t type, virtio_vring_t *vring,
+			   virtio_if_type_t type, vnet_virtio_vring_t *vring,
 			   const int hdr_sz, u32 node_index)
 {
   u16 used, next, avail, n_slots, n_refill;
-  u16 sz = vring->size;
+  u16 sz = vring->queue_size;
   u16 mask = sz - 1;
 
 more:
@@ -47,8 +47,9 @@ more:
 
   next = vring->desc_next;
   avail = vring->avail->idx;
-  n_slots = vlib_buffer_alloc_to_ring_from_pool (
-    vm, vring->buffers, next, vring->size, n_refill, vring->buffer_pool_index);
+  n_slots = vlib_buffer_alloc_to_ring_from_pool (vm, vring->buffers, next,
+						 vring->queue_size, n_refill,
+						 vring->buffer_pool_index);
 
   if (PREDICT_FALSE (n_slots != n_refill))
     {
@@ -60,7 +61,7 @@ more:
 
   while (n_slots)
     {
-      vring_desc_t *d = &vring->desc[next];
+      vnet_virtio_vring_desc_t *d = &vring->desc[next];
       ;
       vlib_buffer_t *b = vlib_get_buffer (vm, vring->buffers[next]);
       /*
@@ -94,11 +95,11 @@ more:
 
 static_always_inline void
 virtio_refill_vring_packed (vlib_main_t *vm, virtio_if_t *vif,
-			    virtio_if_type_t type, virtio_vring_t *vring,
+			    virtio_if_type_t type, vnet_virtio_vring_t *vring,
 			    const int hdr_sz, u32 node_index)
 {
   u16 used, next, n_slots, n_refill, flags = 0, first_desc_flags;
-  u16 sz = vring->size;
+  u16 sz = vring->queue_size;
 
 more:
   used = vring->desc_in_use;
@@ -124,7 +125,7 @@ more:
 
   while (n_slots)
     {
-      vring_packed_desc_t *d = &vring->packed_desc[next];
+      vnet_virtio_vring_packed_desc_t *d = &vring->packed_desc[next];
       vlib_buffer_t *b = vlib_get_buffer (vm, vring->buffers[next]);
       /*
        * current_data may not be initialized with 0 and may contain
diff --git a/src/vnet/devices/virtio/virtio_pci_legacy.c b/src/vnet/devices/virtio/virtio_pci_legacy.c
index 1426a7035a2..d7a1c982413 100644
--- a/src/vnet/devices/virtio/virtio_pci_legacy.c
+++ b/src/vnet/devices/virtio/virtio_pci_legacy.c
@@ -176,10 +176,11 @@ virtio_pci_legacy_set_queue_num (vlib_main_t * vm, virtio_if_t * vif,
 }
 
 static u8
-virtio_pci_legacy_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
-			       u16 queue_id, void *p)
+virtio_pci_legacy_setup_queue (vlib_main_t *vm, virtio_if_t *vif, u16 queue_id,
+			       vnet_virtio_vring_t *vring)
 {
-  u64 addr = vlib_physmem_get_pa (vm, p) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
+  u64 addr =
+    vlib_physmem_get_pa (vm, vring->desc) >> VIRTIO_PCI_QUEUE_ADDR_SHIFT;
   u32 addr2 = 0, a = (u32) addr;
   vlib_pci_write_io_u16 (vm, vif->pci_dev_handle, VIRTIO_PCI_QUEUE_SEL,
 			 &queue_id);
diff --git a/src/vnet/devices/virtio/virtio_pci_modern.c b/src/vnet/devices/virtio/virtio_pci_modern.c
index 8e090ffed3a..f7313d84bbd 100644
--- a/src/vnet/devices/virtio/virtio_pci_modern.c
+++ b/src/vnet/devices/virtio/virtio_pci_modern.c
@@ -265,32 +265,24 @@ virtio_pci_modern_set_queue_device (virtio_if_t * vif, u64 queue_device)
 }
 
 static u8
-virtio_pci_modern_setup_queue (vlib_main_t * vm, virtio_if_t * vif,
-			       u16 queue_id, void *p)
+virtio_pci_modern_setup_queue (vlib_main_t *vm, virtio_if_t *vif, u16 queue_id,
+			       vnet_virtio_vring_t *vring)
 {
   u64 desc, avail, used;
-  u16 queue_size = 0;
 
   virtio_pci_modern_set_queue_select (vif, queue_id);
-  queue_size = virtio_pci_modern_get_queue_size (vm, vif, queue_id);
 
   if (vif->is_packed)
     {
-      virtio_vring_t *vring = (virtio_vring_t *) p;
-
       desc = vlib_physmem_get_pa (vm, vring->packed_desc);
       avail = vlib_physmem_get_pa (vm, vring->driver_event);
       used = vlib_physmem_get_pa (vm, vring->device_event);
     }
   else
     {
-      vring_t vr;
-
-      vring_init (&vr, queue_size, p, VIRTIO_PCI_VRING_ALIGN);
-
-      desc = vlib_physmem_get_pa (vm, vr.desc);
-      avail = vlib_physmem_get_pa (vm, vr.avail);
-      used = vlib_physmem_get_pa (vm, vr.used);
+      desc = vlib_physmem_get_pa (vm, vring->desc);
+      avail = vlib_physmem_get_pa (vm, vring->avail);
+      used = vlib_physmem_get_pa (vm, vring->used);
     }
 
   virtio_pci_modern_set_queue_desc (vif, desc);
diff --git a/src/vnet/devices/virtio/virtio_pre_input.c b/src/vnet/devices/virtio/virtio_pre_input.c
index ee6e848310d..eb208fd3a39 100644
--- a/src/vnet/devices/virtio/virtio_pre_input.c
+++ b/src/vnet/devices/virtio/virtio_pre_input.c
@@ -22,7 +22,7 @@
 #include <vnet/devices/virtio/virtio_inline.h>
 
 static_always_inline uword
-virtio_pre_input_inline (vlib_main_t *vm, virtio_vring_t *txq_vring,
+virtio_pre_input_inline (vlib_main_t *vm, vnet_virtio_vring_t *txq_vring,
 			 vnet_hw_if_tx_queue_t *txq, u8 packet_coalesce,
 			 u8 packet_buffering)
 {
@@ -66,7 +66,7 @@ virtio_pre_input (vlib_main_t *vm, vlib_node_runtime_t *node,
     {
       if (vif->packet_coalesce || vif->packet_buffering)
 	{
-	  virtio_vring_t *txq_vring;
+	  vnet_virtio_vring_t *txq_vring;
 	  vec_foreach (txq_vring, vif->txq_vrings)
 	    {
 	      vnet_hw_if_tx_queue_t *txq =
diff --git a/src/vnet/devices/virtio/virtio_process.c b/src/vnet/devices/virtio/virtio_process.c
index f347ef2ab57..18b34e0aa62 100644
--- a/src/vnet/devices/virtio/virtio_process.c
+++ b/src/vnet/devices/virtio/virtio_process.c
@@ -50,7 +50,7 @@ virtio_send_interrupt_process (vlib_main_t * vm,
 	    {
 	      if (vif->packet_coalesce || vif->packet_buffering)
 		{
-		  virtio_vring_t *vring;
+		  vnet_virtio_vring_t *vring;
 		  vec_foreach (vring, vif->rxq_vrings)
 		    {
 		      if (vring->mode == VNET_HW_IF_RX_MODE_INTERRUPT ||
diff --git a/src/vnet/devices/virtio/virtio_std.h b/src/vnet/devices/virtio/virtio_std.h
index 619dd66d5ed..86984339bc2 100644
--- a/src/vnet/devices/virtio/virtio_std.h
+++ b/src/vnet/devices/virtio/virtio_std.h
@@ -64,7 +64,7 @@ typedef enum
 #define _(f,n) f = n,
   foreach_virtio_net_features
 #undef _
-} virtio_net_feature_t;
+} vnet_virtio_net_feature_t;
 
 #define VIRTIO_FEATURE(X) (1ULL << X)
 
@@ -87,7 +87,7 @@ typedef enum
 #define _(f,n) f = n,
   foreach_virtio_event_idx_flags
 #undef _
-} virtio_event_idx_flags_t;
+} vnet_virtio_event_idx_flags_t;
 
 #define VRING_USED_F_NO_NOTIFY  1
 #define VRING_AVAIL_F_NO_INTERRUPT 1
@@ -98,7 +98,7 @@ typedef struct
   u32 len;
   u16 flags;
   u16 next;
-} vring_desc_t;
+} vnet_virtio_vring_desc_t;
 
 typedef struct
 {
@@ -106,38 +106,36 @@ typedef struct
   u16 idx;
   u16 ring[0];
   /*  u16 used_event; */
-} vring_avail_t;
+} vnet_virtio_vring_avail_t;
 
 typedef struct
 {
   u32 id;
   u32 len;
-} vring_used_elem_t;
+} vnet_virtio_vring_used_elem_t;
 
 typedef struct
 {
   u16 flags;
   u16 idx;
-  vring_used_elem_t ring[0];
+  vnet_virtio_vring_used_elem_t ring[0];
   /* u16 avail_event; */
-} vring_used_t;
+} vnet_virtio_vring_used_t;
 
 /* *INDENT-OFF* */
-typedef CLIB_PACKED (struct
-{
-   u64 addr;	// packet data buffer address
-   u32 len;	// packet data buffer size
-   u16 id;	// buffer id
-   u16 flags;	// flags
-}) vring_packed_desc_t;
+typedef CLIB_PACKED (struct {
+  u64 addr;  // packet data buffer address
+  u32 len;   // packet data buffer size
+  u16 id;    // buffer id
+  u16 flags; // flags
+}) vnet_virtio_vring_packed_desc_t;
 
-STATIC_ASSERT_SIZEOF (vring_packed_desc_t, 16);
+STATIC_ASSERT_SIZEOF (vnet_virtio_vring_packed_desc_t, 16);
 
-typedef CLIB_PACKED (struct
-{
+typedef CLIB_PACKED (struct {
   u16 off_wrap;
   u16 flags;
-}) vring_desc_event_t;
+}) vnet_virtio_vring_desc_event_t;
 
 #define VIRTIO_NET_HDR_F_NEEDS_CSUM     1	/* Use csum_start, csum_offset */
 #define VIRTIO_NET_HDR_F_DATA_VALID     2	/* Csum is valid */
@@ -148,8 +146,7 @@ typedef CLIB_PACKED (struct
 #define VIRTIO_NET_HDR_GSO_TCPV6        4	/* GSO frame, IPv6 TCP */
 #define VIRTIO_NET_HDR_GSO_ECN          0x80	/* TCP has ECN set */
 
-typedef CLIB_PACKED (struct
-{
+typedef CLIB_PACKED (struct {
   u8 flags;
   u8 gso_type;
   u16 hdr_len;			/* Ethernet + IP + tcp/udp hdrs */
@@ -157,54 +154,23 @@ typedef CLIB_PACKED (struct
   u16 csum_start;		/* Position to start checksumming from */
   u16 csum_offset;		/* Offset after that to place checksum */
   u16 num_buffers;		/* Number of merged rx buffers */
-}) virtio_net_hdr_v1_t;
+}) vnet_virtio_net_hdr_v1_t;
 
-typedef CLIB_PACKED (struct
-{
+typedef CLIB_PACKED (struct {
   u8 flags;
   u8 gso_type;
   u16 hdr_len;
   u16 gso_size;
   u16 csum_start;
   u16 csum_offset;
-}) virtio_net_hdr_t;
+}) vnet_virtio_net_hdr_t;
 
-typedef CLIB_PACKED (struct
-{
-  virtio_net_hdr_t hdr;
+typedef CLIB_PACKED (struct {
+  vnet_virtio_net_hdr_t hdr;
   u16 num_buffers;
-}) virtio_net_hdr_mrg_rxbuf_t;
+}) vnet_virtio_net_hdr_mrg_rxbuf_t;
 
 /* *INDENT-ON* */
-
-typedef struct
-{
-  u16 num;
-  vring_desc_t *desc;
-  vring_avail_t *avail;
-  vring_used_t *used;
-} vring_t;
-
-static_always_inline void
-vring_init (vring_t * vr, u32 num, void *p, u32 align)
-{
-  vr->num = num;
-  vr->desc = p;
-  vr->avail = (vring_avail_t *) ((char *) p + num * sizeof (vring_desc_t));
-  vr->used =
-    (vring_used_t *) ((char *) p +
-		      ((sizeof (vring_desc_t) * num +
-			sizeof (u16) * (3 + num) + align - 1) & ~(align -
-								  1)));
-}
-
-static_always_inline u16
-vring_size (u32 num, u32 align)
-{
-  return ((sizeof (vring_desc_t) * num + sizeof (u16) * (3 + num)
-	   + align - 1) & ~(align - 1))
-    + sizeof (u16) * 3 + sizeof (vring_used_elem_t) * num;
-}
 #endif
 
 /*