libqos: drop duplicated virtio_vring.h structs

The descriptor element, used, and avail vring structs are defined in
virtio_ring.h.  There is no need to duplicate them in libqos virtio.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1462798061-30382-6-git-send-email-stefanha@redhat.com

tests/libqos/virtio.c

@@ -135,7 +135,7 @@ void qvring_init(const QGuestAllocator *alloc, QVirtQueue *vq, uint64_t addr)
     int i;
 
     vq->desc = addr;
-    vq->avail = vq->desc + vq->size*sizeof(QVRingDesc);
+    vq->avail = vq->desc + vq->size * sizeof(struct vring_desc);
     vq->used = (uint64_t)((vq->avail + sizeof(uint16_t) * (3 + vq->size)
         + vq->align - 1) & ~(vq->align - 1));
 
@@ -156,7 +156,7 @@ void qvring_init(const QGuestAllocator *alloc, QVirtQueue *vq, uint64_t addr)
     /* vq->used->flags */
     writew(vq->used, 0);
     /* vq->used->avail_event */
-    writew(vq->used+2+(sizeof(struct QVRingUsedElem)*vq->size), 0);
+    writew(vq->used + 2 + sizeof(struct vring_used_elem) * vq->size, 0);
 }
 
 QVRingIndirectDesc *qvring_indirect_desc_setup(QVirtioDevice *d,
@@ -167,7 +167,7 @@ QVRingIndirectDesc *qvring_indirect_desc_setup(QVirtioDevice *d,
 
     indirect->index = 0;
     indirect->elem = elem;
-    indirect->desc = guest_alloc(alloc, sizeof(QVRingDesc)*elem);
+    indirect->desc = guest_alloc(alloc, sizeof(struct vring_desc) * elem);
 
     for (i = 0; i < elem - 1; ++i) {
         /* indirect->desc[i].addr */
@@ -240,7 +240,7 @@ uint32_t qvirtqueue_add_indirect(QVirtQueue *vq, QVRingIndirectDesc *indirect)
     writeq(vq->desc + (16 * vq->free_head), indirect->desc);
     /* vq->desc[vq->free_head].len */
     writel(vq->desc + (16 * vq->free_head) + 8,
-                                        sizeof(QVRingDesc) * indirect->elem);
+           sizeof(struct vring_desc) * indirect->elem);
     /* vq->desc[vq->free_head].flags */
     writew(vq->desc + (16 * vq->free_head) + 12, VRING_DESC_F_INDIRECT);
 
@@ -265,7 +265,7 @@ void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice *d, QVirtQueue *vq,
     /* Must read after idx is updated */
     flags = readw(vq->avail);
     avail_event = readw(vq->used + 4 +
-                                (sizeof(struct QVRingUsedElem) * vq->size));
+                                sizeof(struct vring_used_elem) * vq->size);
 
     /* < 1 because we add elements to avail queue one by one */
     if ((flags & VRING_USED_F_NO_NOTIFY) == 0 &&

tests/libqos/virtio.h

@@ -11,6 +11,7 @@
 #define LIBQOS_VIRTIO_H
 
 #include "libqos/malloc.h"
+#include "standard-headers/linux/virtio_ring.h"
 
 #define QVIRTIO_F_BAD_FEATURE           0x40000000
 
@@ -19,36 +20,10 @@ typedef struct QVirtioDevice {
     uint16_t device_type;
 } QVirtioDevice;
 
-typedef struct QVRingDesc {
-    uint64_t addr;
-    uint32_t len;
-    uint16_t flags;
-    uint16_t next;
-} QVRingDesc;
-
-typedef struct QVRingAvail {
-    uint16_t flags;
-    uint16_t idx;
-    uint16_t ring[0]; /* This is an array of uint16_t */
-    uint16_t used_event;
-} QVRingAvail;
-
-typedef struct QVRingUsedElem {
-    uint32_t id;
-    uint32_t len;
-} QVRingUsedElem;
-
-typedef struct QVRingUsed {
-    uint16_t flags;
-    uint16_t idx;
-    QVRingUsedElem ring[0]; /* This is an array of QVRingUsedElem structs */
-    uint16_t avail_event;
-} QVRingUsed;
-
 typedef struct QVirtQueue {
-    uint64_t desc; /* This points to an array of QVRingDesc */
-    uint64_t avail; /* This points to a QVRingAvail */
-    uint64_t used; /* This points to a QVRingDesc */
+    uint64_t desc; /* This points to an array of struct vring_desc */
+    uint64_t avail; /* This points to a struct vring_avail */
+    uint64_t used; /* This points to a struct vring_desc */
     uint16_t index;
     uint32_t size;
     uint32_t free_head;
@@ -59,7 +34,7 @@ typedef struct QVirtQueue {
 } QVirtQueue;
 
 typedef struct QVRingIndirectDesc {
-    uint64_t desc; /* This points to an array fo QVRingDesc */
+    uint64_t desc; /* This points to an array fo struct vring_desc */
     uint16_t index;
     uint16_t elem;
 } QVRingIndirectDesc;
@@ -110,9 +85,9 @@ typedef struct QVirtioBus {
 
 static inline uint32_t qvring_size(uint32_t num, uint32_t align)
 {
-    return ((sizeof(struct QVRingDesc) * num + sizeof(uint16_t) * (3 + num)
+    return ((sizeof(struct vring_desc) * num + sizeof(uint16_t) * (3 + num)
         + align - 1) & ~(align - 1))
-        + sizeof(uint16_t) * 3 + sizeof(struct QVRingUsedElem) * num;
+        + sizeof(uint16_t) * 3 + sizeof(struct vring_used_elem) * num;
 }
 
 uint8_t qvirtio_config_readb(const QVirtioBus *bus, QVirtioDevice *d,