vn_getsize_locked
error = vn_getsize_locked(tmp->vp, &zsize, td->td_ucred);
error = vn_getsize_locked(vp, obj_size, td->td_ucred);
if (vn_getsize_locked(vp, &size, curthread->td_ucred) != 0)
error = vn_getsize_locked(vp, size, cred);
error = vn_getsize_locked(vp, &size, cred);
error = vn_getsize_locked(outvp, &outsize, outcred);
int vn_getsize_locked(struct vnode *vp, off_t *size, struct ucred *active_cred);
if (vn_getsize_locked(vp, &size, td->td_ucred) != 0)