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virtio-blk: replace x-iothread with iothread link property

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Up until now -device virtio-blk-pci,x-iothread=<id> was used to assign
an IOThread.  This was a temporary solution while we cleaned up QOM link
properties.

This patch switches over to a QOM link property since it is now possible
to restrict the setter to unrealized instances and automatically unref
the IOThread when the virtio-blk-pci device is freed.

Since the "iothread" property is a QOM property and not a qdev property,
we must alias it explicitly for virtio-blk-pci, as well as CCW and
s390-virtio.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2014-06-10 09:03:20 +02:00
parent 32a877e405
commit 467b3f33e9
4 changed files with 17 additions and 1 deletions
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12
hw/block/virtio-blk.c
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@ -784,12 +784,21 @@ static void virtio_blk_device_unrealize(DeviceState *dev, Error **errp)
virtio_cleanup(vdev);
}
static void virtio_blk_instance_init(Object *obj)
{
VirtIOBlock *s = VIRTIO_BLK(obj);
object_property_add_link(obj, "iothread", TYPE_IOTHREAD,
(Object **)&s->blk.iothread,
qdev_prop_allow_set_link_before_realize,
OBJ_PROP_LINK_UNREF_ON_RELEASE, NULL);
}
static Property virtio_blk_properties[] = {
DEFINE_BLOCK_PROPERTIES(VirtIOBlock, blk.conf),
DEFINE_BLOCK_CHS_PROPERTIES(VirtIOBlock, blk.conf),
DEFINE_PROP_STRING("serial", VirtIOBlock, blk.serial),
DEFINE_PROP_BIT("config-wce", VirtIOBlock, blk.config_wce, 0, true),
DEFINE_PROP_IOTHREAD("x-iothread", VirtIOBlock, blk.iothread),
#ifdef __linux__
DEFINE_PROP_BIT("scsi", VirtIOBlock, blk.scsi, 0, true),
#endif
@ -821,6 +830,7 @@ static const TypeInfo virtio_device_info = {
.name = TYPE_VIRTIO_BLK,
.parent = TYPE_VIRTIO_DEVICE,
.instance_size = sizeof(VirtIOBlock),
.instance_init = virtio_blk_instance_init,
.class_init = virtio_blk_class_init,
};