vn_path_to_global_path
error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN);
error = vn_path_to_global_path(td, vp, pathbuf,
error = vn_path_to_global_path(td, nd.ni_vp, pathbuf,
int vn_path_to_global_path(struct thread *td, struct vnode *vp,