vn_rlimit_trunc
err = vn_rlimit_trunc(vap->va_size, td);
error = vn_rlimit_trunc(vap->va_size, td);
error = vn_rlimit_trunc(size, td);
int vn_rlimit_trunc(u_quad_t size, struct thread *td);
error = vn_rlimit_trunc(vap->va_size, td);