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authorNir Weiner <nir.weiner@oracle.com>2019-04-16 15:59:11 +0300
committerMichael S. Tsirkin <mst@redhat.com>2019-06-02 21:32:06 -0400
commit4ea57425584798ccde1da6343cbfbb22497f2e4e (patch)
treef27b426846bd2780869fec38c267dce1eba8c189 /hw/scsi
parentc6d369fd78c654fa618e382b39da850393b8a0da (diff)
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vhost-scsi: Add VMState descriptor
As preparation of enabling migration of vhost-scsi device, define it’s VMState. Note, we keep the convention of verifying in the pre_save() method that the vhost backend must be stopped before attempting to save the device state. Similar to how it is done for vhost-vsock. Reviewed-by: Bijan Mottahedeh <bijan.mottahedeh@oracle.com> Reviewed-by: Liran Alon <liran.alon@oracle.com> Signed-off-by: Nir Weiner <nir.weiner@oracle.com> Message-Id: <20190416125912.44001-3-liran.alon@oracle.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'hw/scsi')
-rw-r--r--hw/scsi/vhost-scsi.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c
index ca42cff..eb0cf9e 100644
--- a/hw/scsi/vhost-scsi.c
+++ b/hw/scsi/vhost-scsi.c
@@ -139,6 +139,28 @@ static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq)
{
}
+static int vhost_scsi_pre_save(void *opaque)
+{
+ VHostSCSICommon *vsc = opaque;
+
+ /* At this point, backend must be stopped, otherwise
+ * it might keep writing to memory. */
+ assert(!vsc->dev.started);
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_virtio_vhost_scsi = {
+ .name = "virtio-vhost_scsi",
+ .minimum_version_id = 1,
+ .version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_VIRTIO_DEVICE,
+ VMSTATE_END_OF_LIST()
+ },
+ .pre_save = vhost_scsi_pre_save,
+};
+
static void vhost_scsi_realize(DeviceState *dev, Error **errp)
{
VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev);
@@ -256,6 +278,7 @@ static void vhost_scsi_class_init(ObjectClass *klass, void *data)
FWPathProviderClass *fwc = FW_PATH_PROVIDER_CLASS(klass);
dc->props = vhost_scsi_properties;
+ dc->vmsd = &vmstate_virtio_vhost_scsi;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
vdc->realize = vhost_scsi_realize;
vdc->unrealize = vhost_scsi_unrealize;