ldi_vp_from_name
(void) ldi_vp_from_name(buf, &vd->vdev_name_vp);
(void) ldi_vp_from_name(vd->vdev_path, &vd->vdev_name_vp);
if ((ret = ldi_vp_from_name(pathname, &vp)) != 0)
extern int ldi_vp_from_name(const char *, vnode_t **);