VD_SIZE_UNKNOWN
if (attr_msg->vdisk_size == VD_SIZE_UNKNOWN) {
if (dsk_size == VD_SIZE_UNKNOWN || dsk_size == 0 || blk_size == 0)
if (dsk_size == VD_SIZE_UNKNOWN || dsk_size == 0 ||
vd->vdisk_size = VD_SIZE_UNKNOWN;
if (old_size != VD_SIZE_UNKNOWN && old_size == new_size &&