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virtio: migrate vdev->broken flag

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Send a subsection if the vdev->broken flag is set.  This allows live
migration of broken virtio devices.

The subsection is only sent if vdev->broken has been set.  In most cases
the flag will be clear and no subsection will be sent.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Stefan Hajnoczi 2016-09-21 16:52:20 +01:00 committed by Michael S. Tsirkin
parent f5ed36635d
commit 791b1daf72
1 changed files with 19 additions and 0 deletions
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19
hw/virtio/virtio.c
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@ -1343,6 +1343,13 @@ static bool virtio_extra_state_needed(void *opaque)
k->has_extra_state(qbus->parent);
}
static bool virtio_broken_needed(void *opaque)
{
VirtIODevice *vdev = opaque;
return vdev->broken;
}
static const VMStateDescription vmstate_virtqueue = {
.name = "virtqueue_state",
.version_id = 1,
@ -1457,6 +1464,17 @@ static const VMStateDescription vmstate_virtio_64bit_features = {
}
};
static const VMStateDescription vmstate_virtio_broken = {
.name = "virtio/broken",
.version_id = 1,
.minimum_version_id = 1,
.needed = &virtio_broken_needed,
.fields = (VMStateField[]) {
VMSTATE_BOOL(broken, VirtIODevice),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_virtio = {
.name = "virtio",
.version_id = 1,
@ -1470,6 +1488,7 @@ static const VMStateDescription vmstate_virtio = {
&vmstate_virtio_64bit_features,
&vmstate_virtio_virtqueues,
&vmstate_virtio_ringsize,
&vmstate_virtio_broken,
&vmstate_virtio_extra_state,
NULL
}