File 0110-virtio-blk-implement-per-device-mig.patch of Package qemu.6354

From 70ab8b40816652737d8f38c18843cbb860f9473e Mon Sep 17 00:00:00 2001
From: Greg Kurz <gkurz@linux.vnet.ibm.com>
Date: Tue, 24 Jun 2014 19:19:23 +0200
Subject: [PATCH] virtio-blk: implement per-device migration calls

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit b2b295a74a17ec8b2eec166cbc65b65307a97ee2)
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 hw/block/virtio-blk.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 63d4ccdf2b..a50be54d21 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -588,12 +588,16 @@ static void virtio_blk_set_status(VirtIODevice *vdev, uint8_t status)
 
 static void virtio_blk_save(QEMUFile *f, void *opaque)
 {
-    VirtIOBlock *s = opaque;
-    VirtIODevice *vdev = VIRTIO_DEVICE(s);
-    VirtIOBlockReq *req = s->rq;
+    VirtIODevice *vdev = VIRTIO_DEVICE(opaque);
 
     virtio_save(vdev, f);
+}
     
+static void virtio_blk_save_device(VirtIODevice *vdev, QEMUFile *f)
+{
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
+    VirtIOBlockReq *req = s->rq;
+
     while (req) {
         qemu_put_sbyte(f, 1);
         qemu_put_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem));
@@ -606,15 +610,17 @@ static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id)
 {
     VirtIOBlock *s = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(s);
-    int ret;
 
     if (version_id != 2)
         return -EINVAL;
 
-    ret = virtio_load(vdev, f, version_id);
-    if (ret) {
-        return ret;
-    }
+    return virtio_load(vdev, f, version_id);
+}
+
+static int virtio_blk_load_device(VirtIODevice *vdev, QEMUFile *f,
+                                  int version_id)
+{
+    VirtIOBlock *s = VIRTIO_BLK(vdev);
 
     while (qemu_get_sbyte(f)) {
         VirtIOBlockReq *req = virtio_blk_alloc_request(s);
@@ -773,6 +779,8 @@ static void virtio_blk_class_init(ObjectClass *klass, void *data)
     vdc->get_features = virtio_blk_get_features;
     vdc->set_status = virtio_blk_set_status;
     vdc->reset = virtio_blk_reset;
+    vdc->save = virtio_blk_save_device;
+    vdc->load = virtio_blk_load_device;
 }
 
 static const TypeInfo virtio_device_info = {