Commit 4ea57425 authored by Nir Weiner's avatar Nir Weiner Committed by Michael S. Tsirkin
Browse files

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: default avatarBijan Mottahedeh <bijan.mottahedeh@oracle.com>
Reviewed-by: default avatarLiran Alon <liran.alon@oracle.com>
Signed-off-by: default avatarNir Weiner <nir.weiner@oracle.com>
Message-Id: <20190416125912.44001-3-liran.alon@oracle.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent c6d369fd

hw/scsi/vhost-scsi.c

+23 −0
Original line number Diff line number Diff line
@@ -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;