[IPV6]: ROUTE: Set appropriate information before inserting a route.

	   2. It is gatewayed route or NONEXTHOP route. Action: clone it.

	 */

	if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {

		nrt = rt6_cow(rt, daddr, saddr, NULL);

		if (!nrt->u.dst.error) {

		nrt = rt6_alloc_cow(rt, daddr, saddr);

		if (!nrt)

			goto out;

		nrt->u.dst.metrics[RTAX_MTU-1] = pmtu;

		if (allfrag)

			nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;

		/* According to RFC 1981, detecting PMTU increase shouldn't be

			   happened within 5 mins, the recommended timer is 10 mins.

			   Here this route expiration time is set to ip6_rt_mtu_expires

			   which is 10 mins. After 10 mins the decreased pmtu is expired

			   and detecting PMTU increase will be automatically happened.

		 * happened within 5 mins, the recommended timer is 10 mins.

		 * Here this route expiration time is set to ip6_rt_mtu_expires

		 * which is 10 mins. After 10 mins the decreased pmtu is expired

		 * and detecting PMTU increase will be automatically happened.

		 */

		dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires);

		nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;

		}

		dst_release(&nrt->u.dst);

		ip6_ins_rt(nrt, NULL, NULL, NULL);

	} else {

		nrt = ip6_rt_copy(rt);

		if (nrt == NULL)