ufs_setacl_nfs4_internal
int ufs_setacl_nfs4_internal(struct vnode *vp, struct acl *aclp, struct lwp *l, bool lock);
error = ufs_setacl_nfs4_internal(ap->a_vp, ap->a_aclp, l, true);
error = ufs_setacl_nfs4_internal(tvp, child_aclp, l, false);
error = ufs_setacl_nfs4_internal(vp, aclp, l, false);