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virtio: introduce qemu_get/put_virtqueue_element

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Move allocation to virtio functions also when loading/saving a
VirtQueueElement.  This will also let the load/save functions
keep backwards compatibility when the VirtQueueElement layout
is changed.

Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-01-31 11:28:59 +01:00 • committed by Michael S. Tsirkin
parent 51b19ebe43
commit ab281c1781
5 changed files with 23 additions and 19 deletions
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10
hw/block/virtio-blk.c
View file

@ -808,8 +808,7 @@ static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f)
while (req) {
qemu_put_sbyte(f, 1);
qemu_put_buffer(f, (unsigned char *)&req->elem,
sizeof(VirtQueueElement));
qemu_put_virtqueue_element(f, &req->elem);
req = req->next;
}
qemu_put_sbyte(f, 0);
@ -832,14 +831,11 @@ static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f,
VirtIOBlock *s = VIRTIO_BLK(vdev);
while (qemu_get_sbyte(f)) {
VirtIOBlockReq *req = g_new(VirtIOBlockReq, 1);
VirtIOBlockReq *req;
req = qemu_get_virtqueue_element(f, sizeof(VirtIOBlockReq));
virtio_blk_init_request(s, req);
qemu_get_buffer(f, (unsigned char *)&req->elem,
sizeof(VirtQueueElement));
req->next = s->rq;
s->rq = req;
virtqueue_map(&req->elem);
}
return 0;