upload tizen1.0 sourceHEADmaster2.0alpha

1 files changed, 2816 insertions, 0 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
new file mode 100644
index 00000000..a275c6e1
--- /dev/null
+++ b/net/ipv6/route.c
@@ -0,0 +1,2816 @@
+/*
+ *	Linux INET6 implementation
+ *	FIB front-end.
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+/*	Changes:
+ *
+ *	YOSHIFUJI Hideaki @USAGI
+ *		reworked default router selection.
+ *		- respect outgoing interface
+ *		- select from (probably) reachable routers (i.e.
+ *		routers in REACHABLE, STALE, DELAY or PROBE states).
+ *		- always select the same router if it is (probably)
+ *		reachable.  otherwise, round-robin the list.
+ *	Ville Nuorvala
+ *		Fixed routing subtrees.
+ */
+
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/times.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/route.h>
+#include <linux/netdevice.h>
+#include <linux/in6.h>
+#include <linux/mroute6.h>
+#include <linux/init.h>
+#include <linux/if_arp.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/nsproxy.h>
+#include <linux/slab.h>
+#include <net/net_namespace.h>
+#include <net/snmp.h>
+#include <net/ipv6.h>
+#include <net/ip6_fib.h>
+#include <net/ip6_route.h>
+#include <net/ndisc.h>
+#include <net/addrconf.h>
+#include <net/tcp.h>
+#include <linux/rtnetlink.h>
+#include <net/dst.h>
+#include <net/xfrm.h>
+#include <net/netevent.h>
+#include <net/netlink.h>
+
+#include <asm/uaccess.h>
+
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+
+/* Set to 3 to get tracing. */
+#define RT6_DEBUG 2
+
+#if RT6_DEBUG >= 3
+#define RDBG(x) printk x
+#define RT6_TRACE(x...) printk(KERN_DEBUG x)
+#else
+#define RDBG(x)
+#define RT6_TRACE(x...) do { ; } while (0)
+#endif
+
+#define CLONE_OFFLINK_ROUTE 0
+
+static struct rt6_info * ip6_rt_copy(struct rt6_info *ort);
+static struct dst_entry	*ip6_dst_check(struct dst_entry *dst, u32 cookie);
+static struct dst_entry *ip6_negative_advice(struct dst_entry *);
+static void		ip6_dst_destroy(struct dst_entry *);
+static void		ip6_dst_ifdown(struct dst_entry *,
+				       struct net_device *dev, int how);
+static int		 ip6_dst_gc(struct dst_ops *ops);
+
+static int		ip6_pkt_discard(struct sk_buff *skb);
+static int		ip6_pkt_discard_out(struct sk_buff *skb);
+static void		ip6_link_failure(struct sk_buff *skb);
+static void		ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu);
+
+#ifdef CONFIG_IPV6_ROUTE_INFO
+static struct rt6_info *rt6_add_route_info(struct net *net,
+					   struct in6_addr *prefix, int prefixlen,
+					   struct in6_addr *gwaddr, int ifindex,
+					   unsigned pref);
+static struct rt6_info *rt6_get_route_info(struct net *net,
+					   struct in6_addr *prefix, int prefixlen,
+					   struct in6_addr *gwaddr, int ifindex);
+#endif
+
+static struct dst_ops ip6_dst_ops_template = {
+	.family			=	AF_INET6,
+	.protocol		=	cpu_to_be16(ETH_P_IPV6),
+	.gc			=	ip6_dst_gc,
+	.gc_thresh		=	1024,
+	.check			=	ip6_dst_check,
+	.destroy		=	ip6_dst_destroy,
+	.ifdown			=	ip6_dst_ifdown,
+	.negative_advice	=	ip6_negative_advice,
+	.link_failure		=	ip6_link_failure,
+	.update_pmtu		=	ip6_rt_update_pmtu,
+	.local_out		=	__ip6_local_out,
+	.entries		=	ATOMIC_INIT(0),
+};
+
+static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu)
+{
+}
+
+static struct dst_ops ip6_dst_blackhole_ops = {
+	.family			=	AF_INET6,
+	.protocol		=	cpu_to_be16(ETH_P_IPV6),
+	.destroy		=	ip6_dst_destroy,
+	.check			=	ip6_dst_check,
+	.update_pmtu		=	ip6_rt_blackhole_update_pmtu,
+	.entries		=	ATOMIC_INIT(0),
+};
+
+static struct rt6_info ip6_null_entry_template = {
+	.dst = {
+		.__refcnt	= ATOMIC_INIT(1),
+		.__use		= 1,
+		.obsolete	= -1,
+		.error		= -ENETUNREACH,
+		.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
+		.input		= ip6_pkt_discard,
+		.output		= ip6_pkt_discard_out,
+	},
+	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
+	.rt6i_protocol  = RTPROT_KERNEL,
+	.rt6i_metric	= ~(u32) 0,
+	.rt6i_ref	= ATOMIC_INIT(1),
+};
+
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+
+static int ip6_pkt_prohibit(struct sk_buff *skb);
+static int ip6_pkt_prohibit_out(struct sk_buff *skb);
+
+static struct rt6_info ip6_prohibit_entry_template = {
+	.dst = {
+		.__refcnt	= ATOMIC_INIT(1),
+		.__use		= 1,
+		.obsolete	= -1,
+		.error		= -EACCES,
+		.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
+		.input		= ip6_pkt_prohibit,
+		.output		= ip6_pkt_prohibit_out,
+	},
+	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
+	.rt6i_protocol  = RTPROT_KERNEL,
+	.rt6i_metric	= ~(u32) 0,
+	.rt6i_ref	= ATOMIC_INIT(1),
+};
+
+static struct rt6_info ip6_blk_hole_entry_template = {
+	.dst = {
+		.__refcnt	= ATOMIC_INIT(1),
+		.__use		= 1,
+		.obsolete	= -1,
+		.error		= -EINVAL,
+		.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
+		.input		= dst_discard,
+		.output		= dst_discard,
+	},
+	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
+	.rt6i_protocol  = RTPROT_KERNEL,
+	.rt6i_metric	= ~(u32) 0,
+	.rt6i_ref	= ATOMIC_INIT(1),
+};
+
+#endif
+
+/* allocate dst with ip6_dst_ops */
+static inline struct rt6_info *ip6_dst_alloc(struct dst_ops *ops)
+{
+	return (struct rt6_info *)dst_alloc(ops);
+}
+
+static void ip6_dst_destroy(struct dst_entry *dst)
+{
+	struct rt6_info *rt = (struct rt6_info *)dst;
+	struct inet6_dev *idev = rt->rt6i_idev;
+
+	if (idev != NULL) {
+		rt->rt6i_idev = NULL;
+		in6_dev_put(idev);
+	}
+}
+
+static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
+			   int how)
+{
+	struct rt6_info *rt = (struct rt6_info *)dst;
+	struct inet6_dev *idev = rt->rt6i_idev;
+	struct net_device *loopback_dev =
+		dev_net(dev)->loopback_dev;
+
+	if (dev != loopback_dev && idev != NULL && idev->dev == dev) {
+		struct inet6_dev *loopback_idev =
+			in6_dev_get(loopback_dev);
+		if (loopback_idev != NULL) {
+			rt->rt6i_idev = loopback_idev;
+			in6_dev_put(idev);
+		}
+	}
+}
+
+static __inline__ int rt6_check_expired(const struct rt6_info *rt)
+{
+	return (rt->rt6i_flags & RTF_EXPIRES &&
+		time_after(jiffies, rt->rt6i_expires));
+}
+
+static inline int rt6_need_strict(struct in6_addr *daddr)
+{
+	return (ipv6_addr_type(daddr) &
+		(IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK));
+}
+
+/*
+ *	Route lookup. Any table->tb6_lock is implied.
+ */
+
+static inline struct rt6_info *rt6_device_match(struct net *net,
+						    struct rt6_info *rt,
+						    struct in6_addr *saddr,
+						    int oif,
+						    int flags)
+{
+	struct rt6_info *local = NULL;
+	struct rt6_info *sprt;
+
+	if (!oif && ipv6_addr_any(saddr))
+		goto out;
+
+	for (sprt = rt; sprt; sprt = sprt->dst.rt6_next) {
+		struct net_device *dev = sprt->rt6i_dev;
+
+		if (oif) {
+			if (dev->ifindex == oif)
+				return sprt;
+			if (dev->flags & IFF_LOOPBACK) {
+				if (sprt->rt6i_idev == NULL ||
+				    sprt->rt6i_idev->dev->ifindex != oif) {
+					if (flags & RT6_LOOKUP_F_IFACE && oif)
+						continue;
+					if (local && (!oif ||
+						      local->rt6i_idev->dev->ifindex == oif))
+						continue;
+				}
+				local = sprt;
+			}
+		} else {
+			if (ipv6_chk_addr(net, saddr, dev,
+					  flags & RT6_LOOKUP_F_IFACE))
+				return sprt;
+		}
+	}
+
+	if (oif) {
+		if (local)
+			return local;
+
+		if (flags & RT6_LOOKUP_F_IFACE)
+			return net->ipv6.ip6_null_entry;
+	}
+out:
+	return rt;
+}
+
+#ifdef CONFIG_IPV6_ROUTER_PREF
+static void rt6_probe(struct rt6_info *rt)
+{
+	struct neighbour *neigh = rt ? rt->rt6i_nexthop : NULL;
+	/*
+	 * Okay, this does not seem to be appropriate
+	 * for now, however, we need to check if it
+	 * is really so; aka Router Reachability Probing.
+	 *
+	 * Router Reachability Probe MUST be rate-limited
+	 * to no more than one per minute.
+	 */
+	if (!neigh || (neigh->nud_state & NUD_VALID))
+		return;
+	read_lock_bh(&neigh->lock);
+	if (!(neigh->nud_state & NUD_VALID) &&
+	    time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) {
+		struct in6_addr mcaddr;
+		struct in6_addr *target;
+
+		neigh->updated = jiffies;
+		read_unlock_bh(&neigh->lock);
+
+		target = (struct in6_addr *)&neigh->primary_key;
+		addrconf_addr_solict_mult(target, &mcaddr);
+		ndisc_send_ns(rt->rt6i_dev, NULL, target, &mcaddr, NULL);
+	} else
+		read_unlock_bh(&neigh->lock);
+}
+#else
+static inline void rt6_probe(struct rt6_info *rt)
+{
+}
+#endif
+
+/*
+ * Default Router Selection (RFC 2461 6.3.6)
+ */
+static inline int rt6_check_dev(struct rt6_info *rt, int oif)
+{
+	struct net_device *dev = rt->rt6i_dev;
+	if (!oif || dev->ifindex == oif)
+		return 2;
+	if ((dev->flags & IFF_LOOPBACK) &&
+	    rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif)
+		return 1;
+	return 0;
+}
+
+static inline int rt6_check_neigh(struct rt6_info *rt)
+{
+	struct neighbour *neigh = rt->rt6i_nexthop;
+	int m;
+	if (rt->rt6i_flags & RTF_NONEXTHOP ||
+	    !(rt->rt6i_flags & RTF_GATEWAY))
+		m = 1;
+	else if (neigh) {
+		read_lock_bh(&neigh->lock);
+		if (neigh->nud_state & NUD_VALID)
+			m = 2;
+#ifdef CONFIG_IPV6_ROUTER_PREF
+		else if (neigh->nud_state & NUD_FAILED)
+			m = 0;
+#endif
+		else
+			m = 1;
+		read_unlock_bh(&neigh->lock);
+	} else
+		m = 0;
+	return m;
+}
+
+static int rt6_score_route(struct rt6_info *rt, int oif,
+			   int strict)
+{
+	int m, n;
+
+	m = rt6_check_dev(rt, oif);
+	if (!m && (strict & RT6_LOOKUP_F_IFACE))
+		return -1;
+#ifdef CONFIG_IPV6_ROUTER_PREF
+	m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2;
+#endif
+	n = rt6_check_neigh(rt);
+	if (!n && (strict & RT6_LOOKUP_F_REACHABLE))
+		return -1;
+	return m;
+}
+
+static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict,
+				   int *mpri, struct rt6_info *match)
+{
+	int m;
+
+	if (rt6_check_expired(rt))
+		goto out;
+
+	m = rt6_score_route(rt, oif, strict);
+	if (m < 0)
+		goto out;
+
+	if (m > *mpri) {
+		if (strict & RT6_LOOKUP_F_REACHABLE)
+			rt6_probe(match);
+		*mpri = m;
+		match = rt;
+	} else if (strict & RT6_LOOKUP_F_REACHABLE) {
+		rt6_probe(rt);
+	}
+
+out:
+	return match;
+}
+
+static struct rt6_info *find_rr_leaf(struct fib6_node *fn,
+				     struct rt6_info *rr_head,
+				     u32 metric, int oif, int strict)
+{
+	struct rt6_info *rt, *match;
+	int mpri = -1;
+
+	match = NULL;
+	for (rt = rr_head; rt && rt->rt6i_metric == metric;
+	     rt = rt->dst.rt6_next)
+		match = find_match(rt, oif, strict, &mpri, match);
+	for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric;
+	     rt = rt->dst.rt6_next)
+		match = find_match(rt, oif, strict, &mpri, match);
+
+	return match;
+}
+
+static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict)
+{
+	struct rt6_info *match, *rt0;
+	struct net *net;
+
+	RT6_TRACE("%s(fn->leaf=%p, oif=%d)\n",
+		  __func__, fn->leaf, oif);
+
+	rt0 = fn->rr_ptr;
+	if (!rt0)
+		fn->rr_ptr = rt0 = fn->leaf;
+
+	match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict);
+
+	if (!match &&
+	    (strict & RT6_LOOKUP_F_REACHABLE)) {
+		struct rt6_info *next = rt0->dst.rt6_next;
+
+		/* no entries matched; do round-robin */
+		if (!next || next->rt6i_metric != rt0->rt6i_metric)
+			next = fn->leaf;
+
+		if (next != rt0)
+			fn->rr_ptr = next;
+	}
+
+	RT6_TRACE("%s() => %p\n",
+		  __func__, match);
+
+	net = dev_net(rt0->rt6i_dev);
+	return (match ? match : net->ipv6.ip6_null_entry);
+}
+
+#ifdef CONFIG_IPV6_ROUTE_INFO
+int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
+		  struct in6_addr *gwaddr)
+{
+	struct net *net = dev_net(dev);
+	struct route_info *rinfo = (struct route_info *) opt;
+	struct in6_addr prefix_buf, *prefix;
+	unsigned int pref;
+	unsigned long lifetime;
+	struct rt6_info *rt;
+
+	if (len < sizeof(struct route_info)) {
+		return -EINVAL;
+	}
+
+	/* Sanity check for prefix_len and length */
+	if (rinfo->length > 3) {
+		return -EINVAL;
+	} else if (rinfo->prefix_len > 128) {
+		return -EINVAL;
+	} else if (rinfo->prefix_len > 64) {
+		if (rinfo->length < 2) {
+			return -EINVAL;
+		}
+	} else if (rinfo->prefix_len > 0) {
+		if (rinfo->length < 1) {
+			return -EINVAL;
+		}
+	}
+
+	pref = rinfo->route_pref;
+	if (pref == ICMPV6_ROUTER_PREF_INVALID)
+		return -EINVAL;
+
+	lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ);
+
+	if (rinfo->length == 3)
+		prefix = (struct in6_addr *)rinfo->prefix;
+	else {
+		/* this function is safe */
+		ipv6_addr_prefix(&prefix_buf,
+				 (struct in6_addr *)rinfo->prefix,
+				 rinfo->prefix_len);
+		prefix = &prefix_buf;
+	}
+
+	rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr,
+				dev->ifindex);
+
+	if (rt && !lifetime) {
+		ip6_del_rt(rt);
+		rt = NULL;
+	}
+
+	if (!rt && lifetime)
+		rt = rt6_add_route_info(net, prefix, rinfo->prefix_len, gwaddr, dev->ifindex,
+					pref);
+	else if (rt)
+		rt->rt6i_flags = RTF_ROUTEINFO |
+				 (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref);
+
+	if (rt) {
+		if (!addrconf_finite_timeout(lifetime)) {
+			rt->rt6i_flags &= ~RTF_EXPIRES;
+		} else {
+			rt->rt6i_expires = jiffies + HZ * lifetime;
+			rt->rt6i_flags |= RTF_EXPIRES;
+		}
+		dst_release(&rt->dst);
+	}
+	return 0;
+}
+#endif
+
+#define BACKTRACK(__net, saddr)			\
+do { \
+	if (rt == __net->ipv6.ip6_null_entry) {	\
+		struct fib6_node *pn; \
+		while (1) { \
+			if (fn->fn_flags & RTN_TL_ROOT) \
+				goto out; \
+			pn = fn->parent; \
+			if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \
+				fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); \
+			else \
+				fn = pn; \
+			if (fn->fn_flags & RTN_RTINFO) \
+				goto restart; \
+		} \
+	} \
+} while(0)
+
+static struct rt6_info *ip6_pol_route_lookup(struct net *net,
+					     struct fib6_table *table,
+					     struct flowi *fl, int flags)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt;
+
+	read_lock_bh(&table->tb6_lock);
+	fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
+restart:
+	rt = fn->leaf;
+	rt = rt6_device_match(net, rt, &fl->fl6_src, fl->oif, flags);
+	BACKTRACK(net, &fl->fl6_src);
+out:
+	dst_use(&rt->dst, jiffies);
+	read_unlock_bh(&table->tb6_lock);
+	return rt;
+
+}
+
+struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
+			    const struct in6_addr *saddr, int oif, int strict)
+{
+	struct flowi fl = {
+		.oif = oif,
+		.nl_u = {
+			.ip6_u = {
+				.daddr = *daddr,
+			},
+		},
+	};
+	struct dst_entry *dst;
+	int flags = strict ? RT6_LOOKUP_F_IFACE : 0;
+
+	if (saddr) {
+		memcpy(&fl.fl6_src, saddr, sizeof(*saddr));
+		flags |= RT6_LOOKUP_F_HAS_SADDR;
+	}
+
+	dst = fib6_rule_lookup(net, &fl, flags, ip6_pol_route_lookup);
+	if (dst->error == 0)
+		return (struct rt6_info *) dst;
+
+	dst_release(dst);
+
+	return NULL;
+}
+
+EXPORT_SYMBOL(rt6_lookup);
+
+/* ip6_ins_rt is called with FREE table->tb6_lock.
+   It takes new route entry, the addition fails by any reason the
+   route is freed. In any case, if caller does not hold it, it may
+   be destroyed.
+ */
+
+static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info)
+{
+	int err;
+	struct fib6_table *table;
+
+	table = rt->rt6i_table;
+	write_lock_bh(&table->tb6_lock);
+	err = fib6_add(&table->tb6_root, rt, info);
+	write_unlock_bh(&table->tb6_lock);
+
+	return err;
+}
+
+int ip6_ins_rt(struct rt6_info *rt)
+{
+	struct nl_info info = {
+		.nl_net = dev_net(rt->rt6i_dev),
+	};
+	return __ip6_ins_rt(rt, &info);
+}
+
+static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, struct in6_addr *daddr,
+				      struct in6_addr *saddr)
+{
+	struct rt6_info *rt;
+
+	/*
+	 *	Clone the route.
+	 */
+
+	rt = ip6_rt_copy(ort);
+
+	if (rt) {
+		struct neighbour *neigh;
+		int attempts = !in_softirq();
+
+		if (!(rt->rt6i_flags&RTF_GATEWAY)) {
+			if (rt->rt6i_dst.plen != 128 &&
+			    ipv6_addr_equal(&rt->rt6i_dst.addr, daddr))
+				rt->rt6i_flags |= RTF_ANYCAST;
+			ipv6_addr_copy(&rt->rt6i_gateway, daddr);
+		}
+
+		ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
+		rt->rt6i_dst.plen = 128;
+		rt->rt6i_flags |= RTF_CACHE;
+		rt->dst.flags |= DST_HOST;
+
+#ifdef CONFIG_IPV6_SUBTREES
+		if (rt->rt6i_src.plen && saddr) {
+			ipv6_addr_copy(&rt->rt6i_src.addr, saddr);
+			rt->rt6i_src.plen = 128;
+		}
+#endif
+
+	retry:
+		neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+		if (IS_ERR(neigh)) {
+			struct net *net = dev_net(rt->rt6i_dev);
+			int saved_rt_min_interval =
+				net->ipv6.sysctl.ip6_rt_gc_min_interval;
+			int saved_rt_elasticity =
+				net->ipv6.sysctl.ip6_rt_gc_elasticity;
+
+			if (attempts-- > 0) {
+				net->ipv6.sysctl.ip6_rt_gc_elasticity = 1;
+				net->ipv6.sysctl.ip6_rt_gc_min_interval = 0;
+
+				ip6_dst_gc(&net->ipv6.ip6_dst_ops);
+
+				net->ipv6.sysctl.ip6_rt_gc_elasticity =
+					saved_rt_elasticity;
+				net->ipv6.sysctl.ip6_rt_gc_min_interval =
+					saved_rt_min_interval;
+				goto retry;
+			}
+
+			if (net_ratelimit())
+				printk(KERN_WARNING
+				       "ipv6: Neighbour table overflow.\n");
+			dst_free(&rt->dst);
+			return NULL;
+		}
+		rt->rt6i_nexthop = neigh;
+
+	}
+
+	return rt;
+}
+
+static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, struct in6_addr *daddr)
+{
+	struct rt6_info *rt = ip6_rt_copy(ort);
+	if (rt) {
+		ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
+		rt->rt6i_dst.plen = 128;
+		rt->rt6i_flags |= RTF_CACHE;
+		rt->dst.flags |= DST_HOST;
+		rt->rt6i_nexthop = neigh_clone(ort->rt6i_nexthop);
+	}
+	return rt;
+}
+
+static struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, int oif,
+				      struct flowi *fl, int flags)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt, *nrt;
+	int strict = 0;
+	int attempts = 3;
+	int err;
+	int reachable = net->ipv6.devconf_all->forwarding ? 0 : RT6_LOOKUP_F_REACHABLE;
+
+	strict |= flags & RT6_LOOKUP_F_IFACE;
+
+relookup:
+	read_lock_bh(&table->tb6_lock);
+
+restart_2:
+	fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
+
+restart:
+	rt = rt6_select(fn, oif, strict | reachable);
+
+	BACKTRACK(net, &fl->fl6_src);
+	if (rt == net->ipv6.ip6_null_entry ||
+	    rt->rt6i_flags & RTF_CACHE)
+		goto out;
+
+	dst_hold(&rt->dst);
+	read_unlock_bh(&table->tb6_lock);
+
+	if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP))
+		nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src);
+	else {
+#if CLONE_OFFLINK_ROUTE
+		nrt = rt6_alloc_clone(rt, &fl->fl6_dst);
+#else
+		goto out2;
+#endif
+	}
+
+	dst_release(&rt->dst);
+	rt = nrt ? : net->ipv6.ip6_null_entry;
+
+	dst_hold(&rt->dst);
+	if (nrt) {
+		err = ip6_ins_rt(nrt);
+		if (!err)
+			goto out2;
+	}
+
+	if (--attempts <= 0)
+		goto out2;
+
+	/*
+	 * Race condition! In the gap, when table->tb6_lock was
+	 * released someone could insert this route.  Relookup.
+	 */
+	dst_release(&rt->dst);
+	goto relookup;
+
+out:
+	if (reachable) {
+		reachable = 0;
+		goto restart_2;
+	}
+	dst_hold(&rt->dst);
+	read_unlock_bh(&table->tb6_lock);
+out2:
+	rt->dst.lastuse = jiffies;
+	rt->dst.__use++;
+
+	return rt;
+}
+
+static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *table,
+					    struct flowi *fl, int flags)
+{
+	return ip6_pol_route(net, table, fl->iif, fl, flags);
+}
+
+void ip6_route_input(struct sk_buff *skb)
+{
+	struct ipv6hdr *iph = ipv6_hdr(skb);
+	struct net *net = dev_net(skb->dev);
+	int flags = RT6_LOOKUP_F_HAS_SADDR;
+	struct flowi fl = {
+		.iif = skb->dev->ifindex,
+		.nl_u = {
+			.ip6_u = {
+				.daddr = iph->daddr,
+				.saddr = iph->saddr,
+				.flowlabel = (* (__be32 *) iph)&IPV6_FLOWINFO_MASK,
+			},
+		},
+		.mark = skb->mark,
+		.proto = iph->nexthdr,
+	};
+
+	if (rt6_need_strict(&iph->daddr) && skb->dev->type != ARPHRD_PIMREG)
+		flags |= RT6_LOOKUP_F_IFACE;
+
+	skb_dst_set(skb, fib6_rule_lookup(net, &fl, flags, ip6_pol_route_input));
+}
+
+static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table,
+					     struct flowi *fl, int flags)
+{
+	return ip6_pol_route(net, table, fl->oif, fl, flags);
+}
+
+struct dst_entry * ip6_route_output(struct net *net, struct sock *sk,
+				    struct flowi *fl)
+{
+	int flags = 0;
+
+	if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl->fl6_dst))
+		flags |= RT6_LOOKUP_F_IFACE;
+
+	if (!ipv6_addr_any(&fl->fl6_src))
+		flags |= RT6_LOOKUP_F_HAS_SADDR;
+	else if (sk)
+		flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs);
+
+	return fib6_rule_lookup(net, fl, flags, ip6_pol_route_output);
+}
+
+EXPORT_SYMBOL(ip6_route_output);
+
+int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl)
+{
+	struct rt6_info *ort = (struct rt6_info *) *dstp;
+	struct rt6_info *rt = (struct rt6_info *)
+		dst_alloc(&ip6_dst_blackhole_ops);
+	struct dst_entry *new = NULL;
+
+	if (rt) {
+		new = &rt->dst;
+
+		atomic_set(&new->__refcnt, 1);
+		new->__use = 1;
+		new->input = dst_discard;
+		new->output = dst_discard;
+
+		memcpy(new->metrics, ort->dst.metrics, RTAX_MAX*sizeof(u32));
+		new->dev = ort->dst.dev;
+		if (new->dev)
+			dev_hold(new->dev);
+		rt->rt6i_idev = ort->rt6i_idev;
+		if (rt->rt6i_idev)
+			in6_dev_hold(rt->rt6i_idev);
+		rt->rt6i_expires = 0;
+
+		ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway);
+		rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES;
+		rt->rt6i_metric = 0;
+
+		memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key));
+#ifdef CONFIG_IPV6_SUBTREES
+		memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key));
+#endif
+
+		dst_free(new);
+	}
+
+	dst_release(*dstp);
+	*dstp = new;
+	return (new ? 0 : -ENOMEM);
+}
+EXPORT_SYMBOL_GPL(ip6_dst_blackhole);
+
+/*
+ *	Destination cache support functions
+ */
+
+static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie)
+{
+	struct rt6_info *rt;
+
+	rt = (struct rt6_info *) dst;
+
+	if (rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie))
+		return dst;
+
+	return NULL;
+}
+
+static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
+{
+	struct rt6_info *rt = (struct rt6_info *) dst;
+
+	if (rt) {
+		if (rt->rt6i_flags & RTF_CACHE) {
+			if (rt6_check_expired(rt)) {
+				ip6_del_rt(rt);
+				dst = NULL;
+			}
+		} else {
+			dst_release(dst);
+			dst = NULL;
+		}
+	}
+	return dst;
+}
+
+static void ip6_link_failure(struct sk_buff *skb)
+{
+	struct rt6_info *rt;
+
+	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0);
+
+	rt = (struct rt6_info *) skb_dst(skb);
+	if (rt) {
+		if (rt->rt6i_flags&RTF_CACHE) {
+			dst_set_expires(&rt->dst, 0);
+			rt->rt6i_flags |= RTF_EXPIRES;
+		} else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT))
+			rt->rt6i_node->fn_sernum = -1;
+	}
+}
+
+static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu)
+{
+	struct rt6_info *rt6 = (struct rt6_info*)dst;
+
+	if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) {
+		rt6->rt6i_flags |= RTF_MODIFIED;
+		if (mtu < IPV6_MIN_MTU) {
+			mtu = IPV6_MIN_MTU;
+			dst->metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
+		}
+		dst->metrics[RTAX_MTU-1] = mtu;
+		call_netevent_notifiers(NETEVENT_PMTU_UPDATE, dst);
+	}
+}
+
+static int ipv6_get_mtu(struct net_device *dev);
+
+static inline unsigned int ipv6_advmss(struct net *net, unsigned int mtu)
+{
+	mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
+
+	if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss)
+		mtu = net->ipv6.sysctl.ip6_rt_min_advmss;
+
+	/*
+	 * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and
+	 * corresponding MSS is IPV6_MAXPLEN - tcp_header_size.
+	 * IPV6_MAXPLEN is also valid and means: "any MSS,
+	 * rely only on pmtu discovery"
+	 */
+	if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr))
+		mtu = IPV6_MAXPLEN;
+	return mtu;
+}
+
+static struct dst_entry *icmp6_dst_gc_list;
+static DEFINE_SPINLOCK(icmp6_dst_lock);
+
+struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
+				  struct neighbour *neigh,
+				  const struct in6_addr *addr)
+{
+	struct rt6_info *rt;
+	struct inet6_dev *idev = in6_dev_get(dev);
+	struct net *net = dev_net(dev);
+
+	if (unlikely(idev == NULL))
+		return NULL;
+
+	rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+	if (unlikely(rt == NULL)) {
+		in6_dev_put(idev);
+		goto out;
+	}
+
+	dev_hold(dev);
+	if (neigh)
+		neigh_hold(neigh);
+	else {
+		neigh = ndisc_get_neigh(dev, addr);
+		if (IS_ERR(neigh))
+			neigh = NULL;
+	}
+
+	rt->rt6i_dev	  = dev;
+	rt->rt6i_idev     = idev;
+	rt->rt6i_nexthop  = neigh;
+	atomic_set(&rt->dst.__refcnt, 1);
+	rt->dst.metrics[RTAX_HOPLIMIT-1] = 255;
+	rt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
+	rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->dst));
+	rt->dst.output  = ip6_output;
+
+#if 0	/* there's no chance to use these for ndisc */
+	rt->dst.flags   = ipv6_addr_type(addr) & IPV6_ADDR_UNICAST
+				? DST_HOST
+				: 0;
+	ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
+	rt->rt6i_dst.plen = 128;
+#endif
+
+	spin_lock_bh(&icmp6_dst_lock);
+	rt->dst.next = icmp6_dst_gc_list;
+	icmp6_dst_gc_list = &rt->dst;
+	spin_unlock_bh(&icmp6_dst_lock);
+
+	fib6_force_start_gc(net);
+
+out:
+	return &rt->dst;
+}
+
+int icmp6_dst_gc(void)
+{
+	struct dst_entry *dst, *next, **pprev;
+	int more = 0;
+
+	next = NULL;
+
+	spin_lock_bh(&icmp6_dst_lock);
+	pprev = &icmp6_dst_gc_list;
+
+	while ((dst = *pprev) != NULL) {
+		if (!atomic_read(&dst->__refcnt)) {
+			*pprev = dst->next;
+			dst_free(dst);
+		} else {
+			pprev = &dst->next;
+			++more;
+		}
+	}
+
+	spin_unlock_bh(&icmp6_dst_lock);
+
+	return more;
+}
+
+static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg),
+			    void *arg)
+{
+	struct dst_entry *dst, **pprev;
+
+	spin_lock_bh(&icmp6_dst_lock);
+	pprev = &icmp6_dst_gc_list;
+	while ((dst = *pprev) != NULL) {
+		struct rt6_info *rt = (struct rt6_info *) dst;
+		if (func(rt, arg)) {
+			*pprev = dst->next;
+			dst_free(dst);
+		} else {
+			pprev = &dst->next;
+		}
+	}
+	spin_unlock_bh(&icmp6_dst_lock);
+}
+
+static int ip6_dst_gc(struct dst_ops *ops)
+{
+	unsigned long now = jiffies;
+	struct net *net = container_of(ops, struct net, ipv6.ip6_dst_ops);
+	int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval;
+	int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size;
+	int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity;
+	int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout;
+	unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc;
+
+	if (time_after(rt_last_gc + rt_min_interval, now) &&
+	    atomic_read(&ops->entries) <= rt_max_size)
+		goto out;
+
+	net->ipv6.ip6_rt_gc_expire++;
+	fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net);
+	net->ipv6.ip6_rt_last_gc = now;
+	if (atomic_read(&ops->entries) < ops->gc_thresh)
+		net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1;
+out:
+	net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>rt_elasticity;
+	return (atomic_read(&ops->entries) > rt_max_size);
+}
+
+/* Clean host part of a prefix. Not necessary in radix tree,
+   but results in cleaner routing tables.
+
+   Remove it only when all the things will work!
+ */
+
+static int ipv6_get_mtu(struct net_device *dev)
+{
+	int mtu = IPV6_MIN_MTU;
+	struct inet6_dev *idev;
+
+	rcu_read_lock();
+	idev = __in6_dev_get(dev);
+	if (idev)
+		mtu = idev->cnf.mtu6;
+	rcu_read_unlock();
+	return mtu;
+}
+
+int ip6_dst_hoplimit(struct dst_entry *dst)
+{
+	int hoplimit = dst_metric(dst, RTAX_HOPLIMIT);
+	if (hoplimit < 0) {
+		struct net_device *dev = dst->dev;
+		struct inet6_dev *idev;
+
+		rcu_read_lock();
+		idev = __in6_dev_get(dev);
+		if (idev)
+			hoplimit = idev->cnf.hop_limit;
+		else
+			hoplimit = dev_net(dev)->ipv6.devconf_all->hop_limit;
+		rcu_read_unlock();
+	}
+	return hoplimit;
+}
+
+/*
+ *
+ */
+
+int ip6_route_add(struct fib6_config *cfg)
+{
+	int err;
+	struct net *net = cfg->fc_nlinfo.nl_net;
+	struct rt6_info *rt = NULL;
+	struct net_device *dev = NULL;
+	struct inet6_dev *idev = NULL;
+	struct fib6_table *table;
+	int addr_type;
+
+	if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128)
+		return -EINVAL;
+#ifndef CONFIG_IPV6_SUBTREES
+	if (cfg->fc_src_len)
+		return -EINVAL;
+#endif
+	if (cfg->fc_ifindex) {
+		err = -ENODEV;
+		dev = dev_get_by_index(net, cfg->fc_ifindex);
+		if (!dev)
+			goto out;
+		idev = in6_dev_get(dev);
+		if (!idev)
+			goto out;
+	}
+
+	if (cfg->fc_metric == 0)
+		cfg->fc_metric = IP6_RT_PRIO_USER;
+
+	table = fib6_new_table(net, cfg->fc_table);
+	if (table == NULL) {
+		err = -ENOBUFS;
+		goto out;
+	}
+
+	rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+
+	if (rt == NULL) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	rt->dst.obsolete = -1;
+	rt->rt6i_expires = (cfg->fc_flags & RTF_EXPIRES) ?
+				jiffies + clock_t_to_jiffies(cfg->fc_expires) :
+				0;
+
+	if (cfg->fc_protocol == RTPROT_UNSPEC)
+		cfg->fc_protocol = RTPROT_BOOT;
+	rt->rt6i_protocol = cfg->fc_protocol;
+
+	addr_type = ipv6_addr_type(&cfg->fc_dst);
+
+	if (addr_type & IPV6_ADDR_MULTICAST)
+		rt->dst.input = ip6_mc_input;
+	else
+		rt->dst.input = ip6_forward;
+
+	rt->dst.output = ip6_output;
+
+	ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len);
+	rt->rt6i_dst.plen = cfg->fc_dst_len;
+	if (rt->rt6i_dst.plen == 128)
+	       rt->dst.flags = DST_HOST;
+
+#ifdef CONFIG_IPV6_SUBTREES
+	ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len);
+	rt->rt6i_src.plen = cfg->fc_src_len;
+#endif
+
+	rt->rt6i_metric = cfg->fc_metric;
+
+	/* We cannot add true routes via loopback here,
+	   they would result in kernel looping; promote them to reject routes
+	 */
+	if ((cfg->fc_flags & RTF_REJECT) ||
+	    (dev && (dev->flags&IFF_LOOPBACK) && !(addr_type&IPV6_ADDR_LOOPBACK))) {
+		/* hold loopback dev/idev if we haven't done so. */
+		if (dev != net->loopback_dev) {
+			if (dev) {
+				dev_put(dev);
+				in6_dev_put(idev);
+			}
+			dev = net->loopback_dev;
+			dev_hold(dev);
+			idev = in6_dev_get(dev);
+			if (!idev) {
+				err = -ENODEV;
+				goto out;
+			}
+		}
+		rt->dst.output = ip6_pkt_discard_out;
+		rt->dst.input = ip6_pkt_discard;
+		rt->dst.error = -ENETUNREACH;
+		rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
+		goto install_route;
+	}
+
+	if (cfg->fc_flags & RTF_GATEWAY) {
+		struct in6_addr *gw_addr;
+		int gwa_type;
+
+		gw_addr = &cfg->fc_gateway;
+		ipv6_addr_copy(&rt->rt6i_gateway, gw_addr);
+		gwa_type = ipv6_addr_type(gw_addr);
+
+		if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) {
+			struct rt6_info *grt;
+
+			/* IPv6 strictly inhibits using not link-local
+			   addresses as nexthop address.
+			   Otherwise, router will not able to send redirects.
+			   It is very good, but in some (rare!) circumstances
+			   (SIT, PtP, NBMA NOARP links) it is handy to allow
+			   some exceptions. --ANK
+			 */
+			err = -EINVAL;
+			if (!(gwa_type&IPV6_ADDR_UNICAST))
+				goto out;
+
+			grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1);
+
+			err = -EHOSTUNREACH;
+			if (grt == NULL)
+				goto out;
+			if (dev) {
+				if (dev != grt->rt6i_dev) {
+					dst_release(&grt->dst);
+					goto out;
+				}
+			} else {
+				dev = grt->rt6i_dev;
+				idev = grt->rt6i_idev;
+				dev_hold(dev);
+				in6_dev_hold(grt->rt6i_idev);
+			}
+			if (!(grt->rt6i_flags&RTF_GATEWAY))
+				err = 0;
+			dst_release(&grt->dst);
+
+			if (err)
+				goto out;
+		}
+		err = -EINVAL;
+		if (dev == NULL || (dev->flags&IFF_LOOPBACK))
+			goto out;
+	}
+
+	err = -ENODEV;
+	if (dev == NULL)
+		goto out;
+
+	if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) {
+		rt->rt6i_nexthop = __neigh_lookup_errno(&nd_tbl, &rt->rt6i_gateway, dev);
+		if (IS_ERR(rt->rt6i_nexthop)) {
+			err = PTR_ERR(rt->rt6i_nexthop);
+			rt->rt6i_nexthop = NULL;
+			goto out;
+		}
+	}
+
+	rt->rt6i_flags = cfg->fc_flags;
+
+install_route:
+	if (cfg->fc_mx) {
+		struct nlattr *nla;
+		int remaining;
+
+		nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) {
+			int type = nla_type(nla);
+
+			if (type) {
+				if (type > RTAX_MAX) {
+					err = -EINVAL;
+					goto out;
+				}
+
+				rt->dst.metrics[type - 1] = nla_get_u32(nla);
+			}
+		}
+	}
+
+	if (dst_metric(&rt->dst, RTAX_HOPLIMIT) == 0)
+		rt->dst.metrics[RTAX_HOPLIMIT-1] = -1;
+	if (!dst_mtu(&rt->dst))
+		rt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev);
+	if (!dst_metric(&rt->dst, RTAX_ADVMSS))
+		rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->dst));
+	rt->dst.dev = dev;
+	rt->rt6i_idev = idev;
+	rt->rt6i_table = table;
+
+	cfg->fc_nlinfo.nl_net = dev_net(dev);
+
+	return __ip6_ins_rt(rt, &cfg->fc_nlinfo);
+
+out:
+	if (dev)
+		dev_put(dev);
+	if (idev)
+		in6_dev_put(idev);
+	if (rt)
+		dst_free(&rt->dst);
+	return err;
+}
+
+static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info)
+{
+	int err;
+	struct fib6_table *table;
+	struct net *net = dev_net(rt->rt6i_dev);
+
+	if (rt == net->ipv6.ip6_null_entry)
+		return -ENOENT;
+
+	table = rt->rt6i_table;
+	write_lock_bh(&table->tb6_lock);
+
+	err = fib6_del(rt, info);
+	dst_release(&rt->dst);
+
+	write_unlock_bh(&table->tb6_lock);
+
+	return err;
+}
+
+int ip6_del_rt(struct rt6_info *rt)
+{
+	struct nl_info info = {
+		.nl_net = dev_net(rt->rt6i_dev),
+	};
+	return __ip6_del_rt(rt, &info);
+}
+
+static int ip6_route_del(struct fib6_config *cfg)
+{
+	struct fib6_table *table;
+	struct fib6_node *fn;
+	struct rt6_info *rt;
+	int err = -ESRCH;
+
+	table = fib6_get_table(cfg->fc_nlinfo.nl_net, cfg->fc_table);
+	if (table == NULL)
+		return err;
+
+	read_lock_bh(&table->tb6_lock);
+
+	fn = fib6_locate(&table->tb6_root,
+			 &cfg->fc_dst, cfg->fc_dst_len,
+			 &cfg->fc_src, cfg->fc_src_len);
+
+	if (fn) {
+		for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
+			if (cfg->fc_ifindex &&
+			    (rt->rt6i_dev == NULL ||
+			     rt->rt6i_dev->ifindex != cfg->fc_ifindex))
+				continue;
+			if (cfg->fc_flags & RTF_GATEWAY &&
+			    !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway))
+				continue;
+			if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric)
+				continue;
+			dst_hold(&rt->dst);
+			read_unlock_bh(&table->tb6_lock);
+
+			return __ip6_del_rt(rt, &cfg->fc_nlinfo);
+		}
+	}
+	read_unlock_bh(&table->tb6_lock);
+
+	return err;
+}
+
+/*
+ *	Handle redirects
+ */
+struct ip6rd_flowi {
+	struct flowi fl;
+	struct in6_addr gateway;
+};
+
+static struct rt6_info *__ip6_route_redirect(struct net *net,
+					     struct fib6_table *table,
+					     struct flowi *fl,
+					     int flags)
+{
+	struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl;
+	struct rt6_info *rt;
+	struct fib6_node *fn;
+
+	/*
+	 * Get the "current" route for this destination and
+	 * check if the redirect has come from approriate router.
+	 *
+	 * RFC 2461 specifies that redirects should only be
+	 * accepted if they come from the nexthop to the target.
+	 * Due to the way the routes are chosen, this notion
+	 * is a bit fuzzy and one might need to check all possible
+	 * routes.
+	 */
+
+	read_lock_bh(&table->tb6_lock);
+	fn = fib6_lookup(&table->tb6_root, &fl->fl6_dst, &fl->fl6_src);
+restart:
+	for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
+		/*
+		 * Current route is on-link; redirect is always invalid.
+		 *
+		 * Seems, previous statement is not true. It could
+		 * be node, which looks for us as on-link (f.e. proxy ndisc)
+		 * But then router serving it might decide, that we should
+		 * know truth 8)8) --ANK (980726).
+		 */
+		if (rt6_check_expired(rt))
+			continue;
+		if (!(rt->rt6i_flags & RTF_GATEWAY))
+			continue;
+		if (fl->oif != rt->rt6i_dev->ifindex)
+			continue;
+		if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway))
+			continue;
+		break;
+	}
+
+	if (!rt)
+		rt = net->ipv6.ip6_null_entry;
+	BACKTRACK(net, &fl->fl6_src);
+out:
+	dst_hold(&rt->dst);
+
+	read_unlock_bh(&table->tb6_lock);
+
+	return rt;
+};
+
+static struct rt6_info *ip6_route_redirect(struct in6_addr *dest,
+					   struct in6_addr *src,
+					   struct in6_addr *gateway,
+					   struct net_device *dev)
+{
+	int flags = RT6_LOOKUP_F_HAS_SADDR;
+	struct net *net = dev_net(dev);
+	struct ip6rd_flowi rdfl = {
+		.fl = {
+			.oif = dev->ifindex,
+			.nl_u = {
+				.ip6_u = {
+					.daddr = *dest,
+					.saddr = *src,
+				},
+			},
+		},
+	};
+
+	ipv6_addr_copy(&rdfl.gateway, gateway);
+
+	if (rt6_need_strict(dest))
+		flags |= RT6_LOOKUP_F_IFACE;
+
+	return (struct rt6_info *)fib6_rule_lookup(net, (struct flowi *)&rdfl,
+						   flags, __ip6_route_redirect);
+}
+
+void rt6_redirect(struct in6_addr *dest, struct in6_addr *src,
+		  struct in6_addr *saddr,
+		  struct neighbour *neigh, u8 *lladdr, int on_link)
+{
+	struct rt6_info *rt, *nrt = NULL;
+	struct netevent_redirect netevent;
+	struct net *net = dev_net(neigh->dev);
+
+	rt = ip6_route_redirect(dest, src, saddr, neigh->dev);
+
+	if (rt == net->ipv6.ip6_null_entry) {
+		if (net_ratelimit())
+			printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop "
+			       "for redirect target\n");
+		goto out;
+	}
+
+	/*
+	 *	We have finally decided to accept it.
+	 */
+
+	neigh_update(neigh, lladdr, NUD_STALE,
+		     NEIGH_UPDATE_F_WEAK_OVERRIDE|
+		     NEIGH_UPDATE_F_OVERRIDE|
+		     (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER|
+				     NEIGH_UPDATE_F_ISROUTER))
+		     );
+
+	/*
+	 * Redirect received -> path was valid.
+	 * Look, redirects are sent only in response to data packets,
+	 * so that this nexthop apparently is reachable. --ANK
+	 */
+	dst_confirm(&rt->dst);
+
+	/* Duplicate redirect: silently ignore. */
+	if (neigh == rt->dst.neighbour)
+		goto out;
+
+	nrt = ip6_rt_copy(rt);
+	if (nrt == NULL)
+		goto out;
+
+	nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE;
+	if (on_link)
+		nrt->rt6i_flags &= ~RTF_GATEWAY;
+
+	ipv6_addr_copy(&nrt->rt6i_dst.addr, dest);
+	nrt->rt6i_dst.plen = 128;
+	nrt->dst.flags |= DST_HOST;
+
+	ipv6_addr_copy(&nrt->rt6i_gateway, (struct in6_addr*)neigh->primary_key);
+	nrt->rt6i_nexthop = neigh_clone(neigh);
+	/* Reset pmtu, it may be better */
+	nrt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev);
+	nrt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dev_net(neigh->dev),
+							dst_mtu(&nrt->dst));
+
+	if (ip6_ins_rt(nrt))
+		goto out;
+
+	netevent.old = &rt->dst;
+	netevent.new = &nrt->dst;
+	call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);
+
+	if (rt->rt6i_flags&RTF_CACHE) {
+		ip6_del_rt(rt);
+		return;
+	}
+
+out:
+	dst_release(&rt->dst);
+}
+
+/*
+ *	Handle ICMP "packet too big" messages
+ *	i.e. Path MTU discovery
+ */
+
+static void rt6_do_pmtu_disc(struct in6_addr *daddr, struct in6_addr *saddr,
+			     struct net *net, u32 pmtu, int ifindex)
+{
+	struct rt6_info *rt, *nrt;
+	int allfrag = 0;
+
+	rt = rt6_lookup(net, daddr, saddr, ifindex, 0);
+	if (rt == NULL)
+		return;
+
+	if (pmtu >= dst_mtu(&rt->dst))
+		goto out;
+
+	if (pmtu < IPV6_MIN_MTU) {
+		/*
+		 * According to RFC2460, PMTU is set to the IPv6 Minimum Link
+		 * MTU (1280) and a fragment header should always be included
+		 * after a node receiving Too Big message reporting PMTU is
+		 * less than the IPv6 Minimum Link MTU.
+		 */
+		pmtu = IPV6_MIN_MTU;
+		allfrag = 1;
+	}
+
+	/* New mtu received -> path was valid.
+	   They are sent only in response to data packets,
+	   so that this nexthop apparently is reachable. --ANK
+	 */
+	dst_confirm(&rt->dst);
+
+	/* Host route. If it is static, it would be better
+	   not to override it, but add new one, so that
+	   when cache entry will expire old pmtu
+	   would return automatically.
+	 */
+	if (rt->rt6i_flags & RTF_CACHE) {
+		rt->dst.metrics[RTAX_MTU-1] = pmtu;
+		if (allfrag)
+			rt->dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
+		dst_set_expires(&rt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
+		rt->rt6i_flags |= RTF_MODIFIED|RTF_EXPIRES;
+		goto out;
+	}
+
+	/* Network route.
+	   Two cases are possible:
+	   1. It is connected route. Action: COW
+	   2. It is gatewayed route or NONEXTHOP route. Action: clone it.
+	 */
+	if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP))
+		nrt = rt6_alloc_cow(rt, daddr, saddr);
+	else
+		nrt = rt6_alloc_clone(rt, daddr);
+
+	if (nrt) {
+		nrt->dst.metrics[RTAX_MTU-1] = pmtu;
+		if (allfrag)
+			nrt->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.
+		 */
+		dst_set_expires(&nrt->dst, net->ipv6.sysctl.ip6_rt_mtu_expires);
+		nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
+
+		ip6_ins_rt(nrt);
+	}
+out:
+	dst_release(&rt->dst);
+}
+
+void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
+			struct net_device *dev, u32 pmtu)
+{
+	struct net *net = dev_net(dev);
+
+	/*
+	 * RFC 1981 states that a node "MUST reduce the size of the packets it
+	 * is sending along the path" that caused the Packet Too Big message.
+	 * Since it's not possible in the general case to determine which
+	 * interface was used to send the original packet, we update the MTU
+	 * on the interface that will be used to send future packets. We also
+	 * update the MTU on the interface that received the Packet Too Big in
+	 * case the original packet was forced out that interface with
+	 * SO_BINDTODEVICE or similar. This is the next best thing to the
+	 * correct behaviour, which would be to update the MTU on all
+	 * interfaces.
+	 */
+	rt6_do_pmtu_disc(daddr, saddr, net, pmtu, 0);
+	rt6_do_pmtu_disc(daddr, saddr, net, pmtu, dev->ifindex);
+}
+
+/*
+ *	Misc support functions
+ */
+
+static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
+{
+	struct net *net = dev_net(ort->rt6i_dev);
+	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+
+	if (rt) {
+		rt->dst.input = ort->dst.input;
+		rt->dst.output = ort->dst.output;
+
+		memcpy(rt->dst.metrics, ort->dst.metrics, RTAX_MAX*sizeof(u32));
+		rt->dst.error = ort->dst.error;
+		rt->dst.dev = ort->dst.dev;
+		if (rt->dst.dev)
+			dev_hold(rt->dst.dev);
+		rt->rt6i_idev = ort->rt6i_idev;
+		if (rt->rt6i_idev)
+			in6_dev_hold(rt->rt6i_idev);
+		rt->dst.lastuse = jiffies;
+		rt->rt6i_expires = 0;
+
+		ipv6_addr_copy(&rt->rt6i_gateway, &ort->rt6i_gateway);
+		rt->rt6i_flags = ort->rt6i_flags & ~RTF_EXPIRES;
+		rt->rt6i_metric = 0;
+
+		memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key));
+#ifdef CONFIG_IPV6_SUBTREES
+		memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key));
+#endif
+		rt->rt6i_table = ort->rt6i_table;
+	}
+	return rt;
+}
+
+#ifdef CONFIG_IPV6_ROUTE_INFO
+static struct rt6_info *rt6_get_route_info(struct net *net,
+					   struct in6_addr *prefix, int prefixlen,
+					   struct in6_addr *gwaddr, int ifindex)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt = NULL;
+	struct fib6_table *table;
+
+	table = fib6_get_table(net, RT6_TABLE_INFO);
+	if (table == NULL)
+		return NULL;
+
+	write_lock_bh(&table->tb6_lock);
+	fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0);
+	if (!fn)
+		goto out;
+
+	for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
+		if (rt->rt6i_dev->ifindex != ifindex)
+			continue;
+		if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY))
+			continue;
+		if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr))
+			continue;
+		dst_hold(&rt->dst);
+		break;
+	}
+out:
+	write_unlock_bh(&table->tb6_lock);
+	return rt;
+}
+
+static struct rt6_info *rt6_add_route_info(struct net *net,
+					   struct in6_addr *prefix, int prefixlen,
+					   struct in6_addr *gwaddr, int ifindex,
+					   unsigned pref)
+{
+	struct fib6_config cfg = {
+		.fc_table	= RT6_TABLE_INFO,
+		.fc_metric	= IP6_RT_PRIO_USER,
+		.fc_ifindex	= ifindex,
+		.fc_dst_len	= prefixlen,
+		.fc_flags	= RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO |
+				  RTF_UP | RTF_PREF(pref),
+		.fc_nlinfo.pid = 0,
+		.fc_nlinfo.nlh = NULL,
+		.fc_nlinfo.nl_net = net,
+	};
+
+	ipv6_addr_copy(&cfg.fc_dst, prefix);
+	ipv6_addr_copy(&cfg.fc_gateway, gwaddr);
+
+	/* We should treat it as a default route if prefix length is 0. */
+	if (!prefixlen)
+		cfg.fc_flags |= RTF_DEFAULT;
+
+	ip6_route_add(&cfg);
+
+	return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex);
+}
+#endif
+
+struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *dev)
+{
+	struct rt6_info *rt;
+	struct fib6_table *table;
+
+	table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT);
+	if (table == NULL)
+		return NULL;
+
+	write_lock_bh(&table->tb6_lock);
+	for (rt = table->tb6_root.leaf; rt; rt=rt->dst.rt6_next) {
+		if (dev == rt->rt6i_dev &&
+		    ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) &&
+		    ipv6_addr_equal(&rt->rt6i_gateway, addr))
+			break;
+	}
+	if (rt)
+		dst_hold(&rt->dst);
+	write_unlock_bh(&table->tb6_lock);
+	return rt;
+}
+
+struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
+				     struct net_device *dev,
+				     unsigned int pref)
+{
+	struct fib6_config cfg = {
+		.fc_table	= RT6_TABLE_DFLT,
+		.fc_metric	= IP6_RT_PRIO_USER,
+		.fc_ifindex	= dev->ifindex,
+		.fc_flags	= RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT |
+				  RTF_UP | RTF_EXPIRES | RTF_PREF(pref),
+		.fc_nlinfo.pid = 0,
+		.fc_nlinfo.nlh = NULL,
+		.fc_nlinfo.nl_net = dev_net(dev),
+	};
+
+	ipv6_addr_copy(&cfg.fc_gateway, gwaddr);
+
+	ip6_route_add(&cfg);
+
+	return rt6_get_dflt_router(gwaddr, dev);
+}
+
+void rt6_purge_dflt_routers(struct net *net)
+{
+	struct rt6_info *rt;
+	struct fib6_table *table;
+
+	/* NOTE: Keep consistent with rt6_get_dflt_router */
+	table = fib6_get_table(net, RT6_TABLE_DFLT);
+	if (table == NULL)
+		return;
+
+restart:
+	read_lock_bh(&table->tb6_lock);
+	for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) {
+		if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) {
+			dst_hold(&rt->dst);
+			read_unlock_bh(&table->tb6_lock);
+			ip6_del_rt(rt);
+			goto restart;
+		}
+	}
+	read_unlock_bh(&table->tb6_lock);
+}
+
+static void rtmsg_to_fib6_config(struct net *net,
+				 struct in6_rtmsg *rtmsg,
+				 struct fib6_config *cfg)
+{
+	memset(cfg, 0, sizeof(*cfg));
+
+	cfg->fc_table = RT6_TABLE_MAIN;
+	cfg->fc_ifindex = rtmsg->rtmsg_ifindex;
+	cfg->fc_metric = rtmsg->rtmsg_metric;
+	cfg->fc_expires = rtmsg->rtmsg_info;
+	cfg->fc_dst_len = rtmsg->rtmsg_dst_len;
+	cfg->fc_src_len = rtmsg->rtmsg_src_len;
+	cfg->fc_flags = rtmsg->rtmsg_flags;
+
+	cfg->fc_nlinfo.nl_net = net;
+
+	ipv6_addr_copy(&cfg->fc_dst, &rtmsg->rtmsg_dst);
+	ipv6_addr_copy(&cfg->fc_src, &rtmsg->rtmsg_src);
+	ipv6_addr_copy(&cfg->fc_gateway, &rtmsg->rtmsg_gateway);
+}
+
+int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg)
+{
+	struct fib6_config cfg;
+	struct in6_rtmsg rtmsg;
+	int err;
+
+	switch(cmd) {
+	case SIOCADDRT:		/* Add a route */
+	case SIOCDELRT:		/* Delete a route */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		err = copy_from_user(&rtmsg, arg,
+				     sizeof(struct in6_rtmsg));
+		if (err)
+			return -EFAULT;
+
+		rtmsg_to_fib6_config(net, &rtmsg, &cfg);
+
+		rtnl_lock();
+		switch (cmd) {
+		case SIOCADDRT:
+			err = ip6_route_add(&cfg);
+			break;
+		case SIOCDELRT:
+			err = ip6_route_del(&cfg);
+			break;
+		default:
+			err = -EINVAL;
+		}
+		rtnl_unlock();
+
+		return err;
+	}
+
+	return -EINVAL;
+}
+
+/*
+ *	Drop the packet on the floor
+ */
+
+static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes)
+{
+	int type;
+	struct dst_entry *dst = skb_dst(skb);
+	switch (ipstats_mib_noroutes) {
+	case IPSTATS_MIB_INNOROUTES:
+		type = ipv6_addr_type(&ipv6_hdr(skb)->daddr);
+		if (type == IPV6_ADDR_ANY) {
+			IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst),
+				      IPSTATS_MIB_INADDRERRORS);
+			break;
+		}
+		/* FALLTHROUGH */
+	case IPSTATS_MIB_OUTNOROUTES:
+		IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst),
+			      ipstats_mib_noroutes);
+		break;
+	}
+	icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0);
+	kfree_skb(skb);
+	return 0;
+}
+
+static int ip6_pkt_discard(struct sk_buff *skb)
+{
+	return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES);
+}
+
+static int ip6_pkt_discard_out(struct sk_buff *skb)
+{
+	skb->dev = skb_dst(skb)->dev;
+	return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
+}
+
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+
+static int ip6_pkt_prohibit(struct sk_buff *skb)
+{
+	return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
+}
+
+static int ip6_pkt_prohibit_out(struct sk_buff *skb)
+{
+	skb->dev = skb_dst(skb)->dev;
+	return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
+}
+
+#endif
+
+/*
+ *	Allocate a dst for local (unicast / anycast) address.
+ */
+
+struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
+				    const struct in6_addr *addr,
+				    int anycast)
+{
+	struct net *net = dev_net(idev->dev);
+	struct rt6_info *rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops);
+	struct neighbour *neigh;
+
+	if (rt == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	dev_hold(net->loopback_dev);
+	in6_dev_hold(idev);
+
+	rt->dst.flags = DST_HOST;
+	rt->dst.input = ip6_input;
+	rt->dst.output = ip6_output;
+	rt->rt6i_dev = net->loopback_dev;
+	rt->rt6i_idev = idev;
+	rt->dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
+	rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, dst_mtu(&rt->dst));
+	rt->dst.metrics[RTAX_HOPLIMIT-1] = -1;
+	rt->dst.obsolete = -1;
+
+	rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
+	if (anycast)
+		rt->rt6i_flags |= RTF_ANYCAST;
+	else
+		rt->rt6i_flags |= RTF_LOCAL;
+	neigh = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+	if (IS_ERR(neigh)) {
+		dst_free(&rt->dst);
+
+		/* We are casting this because that is the return
+		 * value type.  But an errno encoded pointer is the
+		 * same regardless of the underlying pointer type,
+		 * and that's what we are returning.  So this is OK.
+		 */
+		return (struct rt6_info *) neigh;
+	}
+	rt->rt6i_nexthop = neigh;
+
+	ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
+	rt->rt6i_dst.plen = 128;
+	rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL);
+
+	atomic_set(&rt->dst.__refcnt, 1);
+
+	return rt;
+}
+
+struct arg_dev_net {
+	struct net_device *dev;
+	struct net *net;
+};
+
+static int fib6_ifdown(struct rt6_info *rt, void *arg)
+{
+	struct net_device *dev = ((struct arg_dev_net *)arg)->dev;
+	struct net *net = ((struct arg_dev_net *)arg)->net;
+
+	if (((void *)rt->rt6i_dev == dev || dev == NULL) &&
+	    rt != net->ipv6.ip6_null_entry) {
+		RT6_TRACE("deleted by ifdown %p\n", rt);
+		return -1;
+	}
+	return 0;
+}
+
+void rt6_ifdown(struct net *net, struct net_device *dev)
+{
+	struct arg_dev_net adn = {
+		.dev = dev,
+		.net = net,
+	};
+
+	fib6_clean_all(net, fib6_ifdown, 0, &adn);
+	icmp6_clean_all(fib6_ifdown, &adn);
+}
+
+struct rt6_mtu_change_arg
+{
+	struct net_device *dev;
+	unsigned mtu;
+};
+
+static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg)
+{
+	struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg;
+	struct inet6_dev *idev;
+	struct net *net = dev_net(arg->dev);
+
+	/* In IPv6 pmtu discovery is not optional,
+	   so that RTAX_MTU lock cannot disable it.
+	   We still use this lock to block changes
+	   caused by addrconf/ndisc.
+	*/
+
+	idev = __in6_dev_get(arg->dev);
+	if (idev == NULL)
+		return 0;
+
+	/* For administrative MTU increase, there is no way to discover
+	   IPv6 PMTU increase, so PMTU increase should be updated here.
+	   Since RFC 1981 doesn't include administrative MTU increase
+	   update PMTU increase is a MUST. (i.e. jumbo frame)
+	 */
+	/*
+	   If new MTU is less than route PMTU, this new MTU will be the
+	   lowest MTU in the path, update the route PMTU to reflect PMTU
+	   decreases; if new MTU is greater than route PMTU, and the
+	   old MTU is the lowest MTU in the path, update the route PMTU
+	   to reflect the increase. In this case if the other nodes' MTU
+	   also have the lowest MTU, TOO BIG MESSAGE will be lead to
+	   PMTU discouvery.
+	 */
+	if (rt->rt6i_dev == arg->dev &&
+	    !dst_metric_locked(&rt->dst, RTAX_MTU) &&
+	    (dst_mtu(&rt->dst) >= arg->mtu ||
+	     (dst_mtu(&rt->dst) < arg->mtu &&
+	      dst_mtu(&rt->dst) == idev->cnf.mtu6))) {
+		rt->dst.metrics[RTAX_MTU-1] = arg->mtu;
+		rt->dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(net, arg->mtu);
+	}
+	return 0;
+}
+
+void rt6_mtu_change(struct net_device *dev, unsigned mtu)
+{
+	struct rt6_mtu_change_arg arg = {
+		.dev = dev,
+		.mtu = mtu,
+	};
+
+	fib6_clean_all(dev_net(dev), rt6_mtu_change_route, 0, &arg);
+}
+
+static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = {
+	[RTA_GATEWAY]           = { .len = sizeof(struct in6_addr) },
+	[RTA_OIF]               = { .type = NLA_U32 },
+	[RTA_IIF]		= { .type = NLA_U32 },
+	[RTA_PRIORITY]          = { .type = NLA_U32 },
+	[RTA_METRICS]           = { .type = NLA_NESTED },
+};
+
+static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh,
+			      struct fib6_config *cfg)
+{
+	struct rtmsg *rtm;
+	struct nlattr *tb[RTA_MAX+1];
+	int err;
+
+	err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
+	if (err < 0)
+		goto errout;
+
+	err = -EINVAL;
+	rtm = nlmsg_data(nlh);
+	memset(cfg, 0, sizeof(*cfg));
+
+	cfg->fc_table = rtm->rtm_table;
+	cfg->fc_dst_len = rtm->rtm_dst_len;
+	cfg->fc_src_len = rtm->rtm_src_len;
+	cfg->fc_flags = RTF_UP;
+	cfg->fc_protocol = rtm->rtm_protocol;
+
+	if (rtm->rtm_type == RTN_UNREACHABLE)
+		cfg->fc_flags |= RTF_REJECT;
+
+	cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid;
+	cfg->fc_nlinfo.nlh = nlh;
+	cfg->fc_nlinfo.nl_net = sock_net(skb->sk);
+
+	if (tb[RTA_GATEWAY]) {
+		nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16);
+		cfg->fc_flags |= RTF_GATEWAY;
+	}
+
+	if (tb[RTA_DST]) {
+		int plen = (rtm->rtm_dst_len + 7) >> 3;
+
+		if (nla_len(tb[RTA_DST]) < plen)
+			goto errout;
+
+		nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen);
+	}
+
+	if (tb[RTA_SRC]) {
+		int plen = (rtm->rtm_src_len + 7) >> 3;
+
+		if (nla_len(tb[RTA_SRC]) < plen)
+			goto errout;
+
+		nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen);
+	}
+
+	if (tb[RTA_OIF])
+		cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]);
+
+	if (tb[RTA_PRIORITY])
+		cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]);
+
+	if (tb[RTA_METRICS]) {
+		cfg->fc_mx = nla_data(tb[RTA_METRICS]);
+		cfg->fc_mx_len = nla_len(tb[RTA_METRICS]);
+	}
+
+	if (tb[RTA_TABLE])
+		cfg->fc_table = nla_get_u32(tb[RTA_TABLE]);
+
+	err = 0;
+errout:
+	return err;
+}
+
+static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+{
+	struct fib6_config cfg;
+	int err;
+
+	err = rtm_to_fib6_config(skb, nlh, &cfg);
+	if (err < 0)
+		return err;
+
+	return ip6_route_del(&cfg);
+}
+
+static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+{
+	struct fib6_config cfg;
+	int err;
+
+	err = rtm_to_fib6_config(skb, nlh, &cfg);
+	if (err < 0)
+		return err;
+
+	return ip6_route_add(&cfg);
+}
+
+static inline size_t rt6_nlmsg_size(void)
+{
+	return NLMSG_ALIGN(sizeof(struct rtmsg))
+	       + nla_total_size(16) /* RTA_SRC */
+	       + nla_total_size(16) /* RTA_DST */
+	       + nla_total_size(16) /* RTA_GATEWAY */
+	       + nla_total_size(16) /* RTA_PREFSRC */
+	       + nla_total_size(4) /* RTA_TABLE */
+	       + nla_total_size(4) /* RTA_IIF */
+	       + nla_total_size(4) /* RTA_OIF */
+	       + nla_total_size(4) /* RTA_PRIORITY */
+	       + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */
+	       + nla_total_size(sizeof(struct rta_cacheinfo));
+}
+
+static int rt6_fill_node(struct net *net,
+			 struct sk_buff *skb, struct rt6_info *rt,
+			 struct in6_addr *dst, struct in6_addr *src,
+			 int iif, int type, u32 pid, u32 seq,
+			 int prefix, int nowait, unsigned int flags)
+{
+	struct rtmsg *rtm;
+	struct nlmsghdr *nlh;
+	long expires;
+	u32 table;
+
+	if (prefix) {	/* user wants prefix routes only */
+		if (!(rt->rt6i_flags & RTF_PREFIX_RT)) {
+			/* success since this is not a prefix route */
+			return 1;
+		}
+	}
+
+	nlh = nlmsg_put(skb, pid, seq, type, sizeof(*rtm), flags);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	rtm = nlmsg_data(nlh);
+	rtm->rtm_family = AF_INET6;
+	rtm->rtm_dst_len = rt->rt6i_dst.plen;
+	rtm->rtm_src_len = rt->rt6i_src.plen;
+	rtm->rtm_tos = 0;
+	if (rt->rt6i_table)
+		table = rt->rt6i_table->tb6_id;
+	else
+		table = RT6_TABLE_UNSPEC;
+	rtm->rtm_table = table;
+	NLA_PUT_U32(skb, RTA_TABLE, table);
+	if (rt->rt6i_flags&RTF_REJECT)
+		rtm->rtm_type = RTN_UNREACHABLE;
+	else if (rt->rt6i_dev && (rt->rt6i_dev->flags&IFF_LOOPBACK))
+		rtm->rtm_type = RTN_LOCAL;
+	else
+		rtm->rtm_type = RTN_UNICAST;
+	rtm->rtm_flags = 0;
+	rtm->rtm_scope = RT_SCOPE_UNIVERSE;
+	rtm->rtm_protocol = rt->rt6i_protocol;
+	if (rt->rt6i_flags&RTF_DYNAMIC)
+		rtm->rtm_protocol = RTPROT_REDIRECT;
+	else if (rt->rt6i_flags & RTF_ADDRCONF)
+		rtm->rtm_protocol = RTPROT_KERNEL;
+	else if (rt->rt6i_flags&RTF_DEFAULT)
+		rtm->rtm_protocol = RTPROT_RA;
+
+	if (rt->rt6i_flags&RTF_CACHE)
+		rtm->rtm_flags |= RTM_F_CLONED;
+
+	if (dst) {
+		NLA_PUT(skb, RTA_DST, 16, dst);
+		rtm->rtm_dst_len = 128;
+	} else if (rtm->rtm_dst_len)
+		NLA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr);
+#ifdef CONFIG_IPV6_SUBTREES
+	if (src) {
+		NLA_PUT(skb, RTA_SRC, 16, src);
+		rtm->rtm_src_len = 128;
+	} else if (rtm->rtm_src_len)
+		NLA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr);
+#endif
+	if (iif) {
+#ifdef CONFIG_IPV6_MROUTE
+		if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) {
+			int err = ip6mr_get_route(net, skb, rtm, nowait);
+			if (err <= 0) {
+				if (!nowait) {
+					if (err == 0)
+						return 0;
+					goto nla_put_failure;
+				} else {
+					if (err == -EMSGSIZE)
+						goto nla_put_failure;
+				}
+			}
+		} else
+#endif
+			NLA_PUT_U32(skb, RTA_IIF, iif);
+	} else if (dst) {
+		struct inet6_dev *idev = ip6_dst_idev(&rt->dst);
+		struct in6_addr saddr_buf;
+		if (ipv6_dev_get_saddr(net, idev ? idev->dev : NULL,
+				       dst, 0, &saddr_buf) == 0)
+			NLA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
+	}
+
+	if (rtnetlink_put_metrics(skb, rt->dst.metrics) < 0)
+		goto nla_put_failure;
+
+	if (rt->dst.neighbour)
+		NLA_PUT(skb, RTA_GATEWAY, 16, &rt->dst.neighbour->primary_key);
+
+	if (rt->dst.dev)
+		NLA_PUT_U32(skb, RTA_OIF, rt->rt6i_dev->ifindex);
+
+	NLA_PUT_U32(skb, RTA_PRIORITY, rt->rt6i_metric);
+
+	if (!(rt->rt6i_flags & RTF_EXPIRES))
+		expires = 0;
+	else if (rt->rt6i_expires - jiffies < INT_MAX)
+		expires = rt->rt6i_expires - jiffies;
+	else
+		expires = INT_MAX;
+
+	if (rtnl_put_cacheinfo(skb, &rt->dst, 0, 0, 0,
+			       expires, rt->dst.error) < 0)
+		goto nla_put_failure;
+
+	return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+int rt6_dump_route(struct rt6_info *rt, void *p_arg)
+{
+	struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg;
+	int prefix;
+
+	if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) {
+		struct rtmsg *rtm = nlmsg_data(arg->cb->nlh);
+		prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0;
+	} else
+		prefix = 0;
+
+	return rt6_fill_node(arg->net,
+		     arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE,
+		     NETLINK_CB(arg->cb->skb).pid, arg->cb->nlh->nlmsg_seq,
+		     prefix, 0, NLM_F_MULTI);
+}
+
+static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
+{
+	struct net *net = sock_net(in_skb->sk);
+	struct nlattr *tb[RTA_MAX+1];
+	struct rt6_info *rt;
+	struct sk_buff *skb;
+	struct rtmsg *rtm;
+	struct flowi fl;
+	int err, iif = 0;
+
+	err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
+	if (err < 0)
+		goto errout;
+
+	err = -EINVAL;
+	memset(&fl, 0, sizeof(fl));
+
+	if (tb[RTA_SRC]) {
+		if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr))
+			goto errout;
+
+		ipv6_addr_copy(&fl.fl6_src, nla_data(tb[RTA_SRC]));
+	}
+
+	if (tb[RTA_DST]) {
+		if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr))
+			goto errout;
+
+		ipv6_addr_copy(&fl.fl6_dst, nla_data(tb[RTA_DST]));
+	}
+
+	if (tb[RTA_IIF])
+		iif = nla_get_u32(tb[RTA_IIF]);
+
+	if (tb[RTA_OIF])
+		fl.oif = nla_get_u32(tb[RTA_OIF]);
+
+	if (iif) {
+		struct net_device *dev;
+		dev = __dev_get_by_index(net, iif);
+		if (!dev) {
+			err = -ENODEV;
+			goto errout;
+		}
+	}
+
+	skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
+	if (skb == NULL) {
+		err = -ENOBUFS;
+		goto errout;
+	}
+
+	/* Reserve room for dummy headers, this skb can pass
+	   through good chunk of routing engine.
+	 */
+	skb_reset_mac_header(skb);
+	skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
+
+	rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl);
+	skb_dst_set(skb, &rt->dst);
+
+	err = rt6_fill_node(net, skb, rt, &fl.fl6_dst, &fl.fl6_src, iif,
+			    RTM_NEWROUTE, NETLINK_CB(in_skb).pid,
+			    nlh->nlmsg_seq, 0, 0, 0);
+	if (err < 0) {
+		kfree_skb(skb);
+		goto errout;
+	}
+
+	err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).pid);
+errout:
+	return err;
+}
+
+void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info)
+{
+	struct sk_buff *skb;
+	struct net *net = info->nl_net;
+	u32 seq;
+	int err;
+
+	err = -ENOBUFS;
+	seq = info->nlh != NULL ? info->nlh->nlmsg_seq : 0;
+
+	skb = nlmsg_new(rt6_nlmsg_size(), gfp_any());
+	if (skb == NULL)
+		goto errout;
+
+	err = rt6_fill_node(net, skb, rt, NULL, NULL, 0,
+				event, info->pid, seq, 0, 0, 0);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in rt6_nlmsg_size() */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(skb);
+		goto errout;
+	}
+	rtnl_notify(skb, net, info->pid, RTNLGRP_IPV6_ROUTE,
+		    info->nlh, gfp_any());
+	return;
+errout:
+	if (err < 0)
+		rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err);
+}
+
+static int ip6_route_dev_notify(struct notifier_block *this,
+				unsigned long event, void *data)
+{
+	struct net_device *dev = (struct net_device *)data;
+	struct net *net = dev_net(dev);
+
+	if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) {
+		net->ipv6.ip6_null_entry->dst.dev = dev;
+		net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev);
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+		net->ipv6.ip6_prohibit_entry->dst.dev = dev;
+		net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev);
+		net->ipv6.ip6_blk_hole_entry->dst.dev = dev;
+		net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev);
+#endif
+	}
+
+	return NOTIFY_OK;
+}
+
+/*
+ *	/proc
+ */
+
+#ifdef CONFIG_PROC_FS
+
+#define RT6_INFO_LEN (32 + 4 + 32 + 4 + 32 + 40 + 5 + 1)
+
+struct rt6_proc_arg
+{
+	char *buffer;
+	int offset;
+	int length;
+	int skip;
+	int len;
+};
+
+static int rt6_info_route(struct rt6_info *rt, void *p_arg)
+{
+	struct seq_file *m = p_arg;
+
+	seq_printf(m, "%pi6 %02x ", &rt->rt6i_dst.addr, rt->rt6i_dst.plen);
+
+#ifdef CONFIG_IPV6_SUBTREES
+	seq_printf(m, "%pi6 %02x ", &rt->rt6i_src.addr, rt->rt6i_src.plen);
+#else
+	seq_puts(m, "00000000000000000000000000000000 00 ");
+#endif
+
+	if (rt->rt6i_nexthop) {
+		seq_printf(m, "%pi6", rt->rt6i_nexthop->primary_key);
+	} else {
+		seq_puts(m, "00000000000000000000000000000000");
+	}
+	seq_printf(m, " %08x %08x %08x %08x %8s\n",
+		   rt->rt6i_metric, atomic_read(&rt->dst.__refcnt),
+		   rt->dst.__use, rt->rt6i_flags,
+		   rt->rt6i_dev ? rt->rt6i_dev->name : "");
+	return 0;
+}
+
+static int ipv6_route_show(struct seq_file *m, void *v)
+{
+	struct net *net = (struct net *)m->private;
+	fib6_clean_all(net, rt6_info_route, 0, m);
+	return 0;
+}
+
+static int ipv6_route_open(struct inode *inode, struct file *file)
+{
+	return single_open_net(inode, file, ipv6_route_show);
+}
+
+static const struct file_operations ipv6_route_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= ipv6_route_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release_net,
+};
+
+static int rt6_stats_seq_show(struct seq_file *seq, void *v)
+{
+	struct net *net = (struct net *)seq->private;
+	seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n",
+		   net->ipv6.rt6_stats->fib_nodes,
+		   net->ipv6.rt6_stats->fib_route_nodes,
+		   net->ipv6.rt6_stats->fib_rt_alloc,
+		   net->ipv6.rt6_stats->fib_rt_entries,
+		   net->ipv6.rt6_stats->fib_rt_cache,
+		   atomic_read(&net->ipv6.ip6_dst_ops.entries),
+		   net->ipv6.rt6_stats->fib_discarded_routes);
+
+	return 0;
+}
+
+static int rt6_stats_seq_open(struct inode *inode, struct file *file)
+{
+	return single_open_net(inode, file, rt6_stats_seq_show);
+}
+
+static const struct file_operations rt6_stats_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = rt6_stats_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = single_release_net,
+};
+#endif	/* CONFIG_PROC_FS */
+
+#ifdef CONFIG_SYSCTL
+
+static
+int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write,
+			      void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	struct net *net = current->nsproxy->net_ns;
+	int delay = net->ipv6.sysctl.flush_delay;
+	if (write) {
+		proc_dointvec(ctl, write, buffer, lenp, ppos);
+		fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net);
+		return 0;
+	} else
+		return -EINVAL;
+}
+
+ctl_table ipv6_route_table_template[] = {
+	{
+		.procname	=	"flush",
+		.data		=	&init_net.ipv6.sysctl.flush_delay,
+		.maxlen		=	sizeof(int),
+		.mode		=	0200,
+		.proc_handler	=	ipv6_sysctl_rtcache_flush
+	},
+	{
+		.procname	=	"gc_thresh",
+		.data		=	&ip6_dst_ops_template.gc_thresh,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec,
+	},
+	{
+		.procname	=	"max_size",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_max_size,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec,
+	},
+	{
+		.procname	=	"gc_min_interval",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_gc_min_interval,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec_jiffies,
+	},
+	{
+		.procname	=	"gc_timeout",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_gc_timeout,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec_jiffies,
+	},
+	{
+		.procname	=	"gc_interval",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_gc_interval,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec_jiffies,
+	},
+	{
+		.procname	=	"gc_elasticity",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_gc_elasticity,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec,
+	},
+	{
+		.procname	=	"mtu_expires",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_mtu_expires,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec_jiffies,
+	},
+	{
+		.procname	=	"min_adv_mss",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_min_advmss,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec,
+	},
+	{
+		.procname	=	"gc_min_interval_ms",
+		.data		=	&init_net.ipv6.sysctl.ip6_rt_gc_min_interval,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+		.proc_handler	=	proc_dointvec_ms_jiffies,
+	},
+	{ }
+};
+
+struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net)
+{
+	struct ctl_table *table;
+
+	table = kmemdup(ipv6_route_table_template,
+			sizeof(ipv6_route_table_template),
+			GFP_KERNEL);
+
+	if (table) {
+		table[0].data = &net->ipv6.sysctl.flush_delay;
+		table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh;
+		table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
+		table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
+		table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
+		table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
+		table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
+		table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
+		table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
+		table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
+	}
+
+	return table;
+}
+#endif
+
+static int __net_init ip6_route_net_init(struct net *net)
+{
+	int ret = -ENOMEM;
+
+	memcpy(&net->ipv6.ip6_dst_ops, &ip6_dst_ops_template,
+	       sizeof(net->ipv6.ip6_dst_ops));
+
+	net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template,
+					   sizeof(*net->ipv6.ip6_null_entry),
+					   GFP_KERNEL);
+	if (!net->ipv6.ip6_null_entry)
+		goto out_ip6_dst_ops;
+	net->ipv6.ip6_null_entry->dst.path =
+		(struct dst_entry *)net->ipv6.ip6_null_entry;
+	net->ipv6.ip6_null_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+	net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template,
+					       sizeof(*net->ipv6.ip6_prohibit_entry),
+					       GFP_KERNEL);
+	if (!net->ipv6.ip6_prohibit_entry)
+		goto out_ip6_null_entry;
+	net->ipv6.ip6_prohibit_entry->dst.path =
+		(struct dst_entry *)net->ipv6.ip6_prohibit_entry;
+	net->ipv6.ip6_prohibit_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+
+	net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template,
+					       sizeof(*net->ipv6.ip6_blk_hole_entry),
+					       GFP_KERNEL);
+	if (!net->ipv6.ip6_blk_hole_entry)
+		goto out_ip6_prohibit_entry;
+	net->ipv6.ip6_blk_hole_entry->dst.path =
+		(struct dst_entry *)net->ipv6.ip6_blk_hole_entry;
+	net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops;
+#endif
+
+	net->ipv6.sysctl.flush_delay = 0;
+	net->ipv6.sysctl.ip6_rt_max_size = 4096;
+	net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2;
+	net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ;
+	net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ;
+	net->ipv6.sysctl.ip6_rt_gc_elasticity = 9;
+	net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ;
+	net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
+
+#ifdef CONFIG_PROC_FS
+	proc_net_fops_create(net, "ipv6_route", 0, &ipv6_route_proc_fops);
+	proc_net_fops_create(net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops);
+#endif
+	net->ipv6.ip6_rt_gc_expire = 30*HZ;
+
+	ret = 0;
+out:
+	return ret;
+
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+out_ip6_prohibit_entry:
+	kfree(net->ipv6.ip6_prohibit_entry);
+out_ip6_null_entry:
+	kfree(net->ipv6.ip6_null_entry);
+#endif
+out_ip6_dst_ops:
+	goto out;
+}
+
+static void __net_exit ip6_route_net_exit(struct net *net)
+{
+#ifdef CONFIG_PROC_FS
+	proc_net_remove(net, "ipv6_route");
+	proc_net_remove(net, "rt6_stats");
+#endif
+	kfree(net->ipv6.ip6_null_entry);
+#ifdef CONFIG_IPV6_MULTIPLE_TABLES
+	kfree(net->ipv6.ip6_prohibit_entry);
+	kfree(net->ipv6.ip6_blk_hole_entry);
+#endif
+}
+
+static struct pernet_operations ip6_route_net_ops = {
+	.init = ip6_route_net_init,
+	.exit = ip6_route_net_exit,
+};
+
+static struct notifier_block ip6_route_dev_notifier = {
+	.notifier_call = ip6_route_dev_notify,
+	.priority = 0,
+};
+
+int __init ip6_route_init(void)
+{
+	int ret;
+
+	ret = -ENOMEM;
+	ip6_dst_ops_template.kmem_cachep =
+		kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0,
+				  SLAB_HWCACHE_ALIGN, NULL);
+	if (!ip6_dst_ops_template.kmem_cachep)
+		goto out;
+
+	ret = register_pernet_subsys(&ip6_route_net_ops);
+	if (ret)
+		goto out_kmem_cache;
+
+	ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep;
+
+	/* Registering of the loopback is done before this portion of code,
+	 * the loopback reference in rt6_info will not be taken, do it
+	 * manually for init_net */
+	init_net.ipv6.ip6_null_entry->dst.dev = init_net.loopback_dev;
+	init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+  #ifdef CONFIG_IPV6_MULTIPLE_TABLES
+	init_net.ipv6.ip6_prohibit_entry->dst.dev = init_net.loopback_dev;
+	init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+	init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev;
+	init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev);
+  #endif
+	ret = fib6_init();
+	if (ret)
+		goto out_register_subsys;
+
+	ret = xfrm6_init();
+	if (ret)
+		goto out_fib6_init;
+
+	ret = fib6_rules_init();
+	if (ret)
+		goto xfrm6_init;
+
+	ret = -ENOBUFS;
+	if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL) ||
+	    __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL) ||
+	    __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL))
+		goto fib6_rules_init;
+
+	ret = register_netdevice_notifier(&ip6_route_dev_notifier);
+	if (ret)
+		goto fib6_rules_init;
+
+out:
+	return ret;
+
+fib6_rules_init:
+	fib6_rules_cleanup();
+xfrm6_init:
+	xfrm6_fini();
+out_fib6_init:
+	fib6_gc_cleanup();
+out_register_subsys:
+	unregister_pernet_subsys(&ip6_route_net_ops);
+out_kmem_cache:
+	kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep);
+	goto out;
+}
+
+void ip6_route_cleanup(void)
+{
+	unregister_netdevice_notifier(&ip6_route_dev_notifier);
+	fib6_rules_cleanup();
+	xfrm6_fini();
+	fib6_gc_cleanup();
+	unregister_pernet_subsys(&ip6_route_net_ops);
+	kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep);
+}