[Qemu-devel] [PATCH v4 07/14] virtio-scsi: Add 'iothread' property to virtio-scsi-pci

[Fam Zheng <famz@redhat.com>]

Similar to this property in virtio-blk for dataplane, add it as a QOM
link in virtio-scsi and an alias in virtio-scsi-pci, in order to assign
an iothread to the device.

Other bus types can be added later.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/scsi/virtio-scsi.c           | 11 +++++++++++
 hw/virtio/virtio-pci.c          |  2 ++
 include/hw/virtio/virtio-scsi.h |  1 +
 3 files changed, 14 insertions(+)

diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 58b4200..91ead26 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -728,6 +728,16 @@ static void virtio_scsi_device_realize(DeviceState *dev, Error **errp)
                     virtio_scsi_save, virtio_scsi_load, s);
 }
 
+static void virtio_scsi_instance_init(Object *obj)
+{
+    VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(obj);
+
+    object_property_add_link(obj, "iothread", TYPE_IOTHREAD,
+                             (Object **)&vs->conf.iothread,
+                             qdev_prop_allow_set_link_before_realize,
+                             OBJ_PROP_LINK_UNREF_ON_RELEASE, &error_abort);
+}
+
 void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
@@ -786,6 +796,7 @@ static const TypeInfo virtio_scsi_info = {
     .name = TYPE_VIRTIO_SCSI,
     .parent = TYPE_VIRTIO_SCSI_COMMON,
     .instance_size = sizeof(VirtIOSCSI),
+    .instance_init = virtio_scsi_instance_init,
     .class_init = virtio_scsi_class_init,
 };
 
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index f560814..6da82b9 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1187,6 +1187,8 @@ static void virtio_scsi_pci_instance_init(Object *obj)
     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
     object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
     object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
+    object_property_add_alias(obj, "iothread", OBJECT(&dev->vdev), "iothread",
+                              &error_abort);
 }
 
 static const TypeInfo virtio_scsi_pci_info = {
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index 8ecce52..1ed93ab 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -153,6 +153,7 @@ struct VirtIOSCSIConf {
     uint32_t cmd_per_lun;
     char *vhostfd;
     char *wwpn;
+    IOThread *iothread;
 };
 
 struct VirtIOSCSICommon;
-- 
1.9.3