Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2131 insertions, 0 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
new file mode 100644
index 0000000..1838029
--- /dev/null
+++ b/net/ipv6/route.c
@@ -0,0 +1,2131 @@
+/*
+ *	Linux INET6 implementation
+ *	FIB front-end.
+ *
+ *	Authors:
+ *	Pedro Roque		<roque@di.fc.ul.pt>	
+ *
+ *	$Id: route.c,v 1.56 2001/10/31 21:55:55 davem Exp $
+ *
+ *	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.
+ */
+
+#include <linux/config.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/init.h>
+#include <linux/netlink.h>
+#include <linux/if_arp.h>
+
+#ifdef 	CONFIG_PROC_FS
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#endif
+
+#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 <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
+
+
+static int ip6_rt_max_size = 4096;
+static int ip6_rt_gc_min_interval = HZ / 2;
+static int ip6_rt_gc_timeout = 60*HZ;
+int ip6_rt_gc_interval = 30*HZ;
+static int ip6_rt_gc_elasticity = 9;
+static int ip6_rt_mtu_expires = 10*60*HZ;
+static int ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
+
+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(void);
+
+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);
+
+static struct dst_ops ip6_dst_ops = {
+	.family			=	AF_INET6,
+	.protocol		=	__constant_htons(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,
+	.entry_size		=	sizeof(struct rt6_info),
+};
+
+struct rt6_info ip6_null_entry = {
+	.u = {
+		.dst = {
+			.__refcnt	= ATOMIC_INIT(1),
+			.__use		= 1,
+			.dev		= &loopback_dev,
+			.obsolete	= -1,
+			.error		= -ENETUNREACH,
+			.metrics	= { [RTAX_HOPLIMIT - 1] = 255, },
+			.input		= ip6_pkt_discard,
+			.output		= ip6_pkt_discard_out,
+			.ops		= &ip6_dst_ops,
+			.path		= (struct dst_entry*)&ip6_null_entry,
+		}
+	},
+	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
+	.rt6i_metric	= ~(u32) 0,
+	.rt6i_ref	= ATOMIC_INIT(1),
+};
+
+struct fib6_node ip6_routing_table = {
+	.leaf		= &ip6_null_entry,
+	.fn_flags	= RTN_ROOT | RTN_TL_ROOT | RTN_RTINFO,
+};
+
+/* Protects all the ip6 fib */
+
+DEFINE_RWLOCK(rt6_lock);
+
+
+/* allocate dst with ip6_dst_ops */
+static __inline__ struct rt6_info *ip6_dst_alloc(void)
+{
+	return (struct rt6_info *)dst_alloc(&ip6_dst_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;
+
+	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));
+}
+
+/*
+ *	Route lookup. Any rt6_lock is implied.
+ */
+
+static __inline__ struct rt6_info *rt6_device_match(struct rt6_info *rt,
+						    int oif,
+						    int strict)
+{
+	struct rt6_info *local = NULL;
+	struct rt6_info *sprt;
+
+	if (oif) {
+		for (sprt = rt; sprt; sprt = sprt->u.next) {
+			struct net_device *dev = sprt->rt6i_dev;
+			if (dev->ifindex == oif)
+				return sprt;
+			if (dev->flags & IFF_LOOPBACK) {
+				if (sprt->rt6i_idev == NULL ||
+				    sprt->rt6i_idev->dev->ifindex != oif) {
+					if (strict && oif)
+						continue;
+					if (local && (!oif || 
+						      local->rt6i_idev->dev->ifindex == oif))
+						continue;
+				}
+				local = sprt;
+			}
+		}
+
+		if (local)
+			return local;
+
+		if (strict)
+			return &ip6_null_entry;
+	}
+	return rt;
+}
+
+/*
+ *	pointer to the last default router chosen. BH is disabled locally.
+ */
+static struct rt6_info *rt6_dflt_pointer;
+static DEFINE_SPINLOCK(rt6_dflt_lock);
+
+void rt6_reset_dflt_pointer(struct rt6_info *rt)
+{
+	spin_lock_bh(&rt6_dflt_lock);
+	if (rt == NULL || rt == rt6_dflt_pointer) {
+		RT6_TRACE("reset default router: %p->NULL\n", rt6_dflt_pointer);
+		rt6_dflt_pointer = NULL;
+	}
+	spin_unlock_bh(&rt6_dflt_lock);
+}
+
+/* Default Router Selection (RFC 2461 6.3.6) */
+static struct rt6_info *rt6_best_dflt(struct rt6_info *rt, int oif)
+{
+	struct rt6_info *match = NULL;
+	struct rt6_info *sprt;
+	int mpri = 0;
+
+	for (sprt = rt; sprt; sprt = sprt->u.next) {
+		struct neighbour *neigh;
+		int m = 0;
+
+		if (!oif ||
+		    (sprt->rt6i_dev &&
+		     sprt->rt6i_dev->ifindex == oif))
+			m += 8;
+
+		if (rt6_check_expired(sprt))
+			continue;
+
+		if (sprt == rt6_dflt_pointer)
+			m += 4;
+
+		if ((neigh = sprt->rt6i_nexthop) != NULL) {
+			read_lock_bh(&neigh->lock);
+			switch (neigh->nud_state) {
+			case NUD_REACHABLE:
+				m += 3;
+				break;
+
+			case NUD_STALE:
+			case NUD_DELAY:
+			case NUD_PROBE:
+				m += 2;
+				break;
+
+			case NUD_NOARP:
+			case NUD_PERMANENT:
+				m += 1;
+				break;
+
+			case NUD_INCOMPLETE:
+			default:
+				read_unlock_bh(&neigh->lock);
+				continue;
+			}
+			read_unlock_bh(&neigh->lock);
+		} else {
+			continue;
+		}
+
+		if (m > mpri || m >= 12) {
+			match = sprt;
+			mpri = m;
+			if (m >= 12) {
+				/* we choose the last default router if it
+				 * is in (probably) reachable state.
+				 * If route changed, we should do pmtu
+				 * discovery. --yoshfuji
+				 */
+				break;
+			}
+		}
+	}
+
+	spin_lock(&rt6_dflt_lock);
+	if (!match) {
+		/*
+		 *	No default routers are known to be reachable.
+		 *	SHOULD round robin
+		 */
+		if (rt6_dflt_pointer) {
+			for (sprt = rt6_dflt_pointer->u.next;
+			     sprt; sprt = sprt->u.next) {
+				if (sprt->u.dst.obsolete <= 0 &&
+				    sprt->u.dst.error == 0 &&
+				    !rt6_check_expired(sprt)) {
+					match = sprt;
+					break;
+				}
+			}
+			for (sprt = rt;
+			     !match && sprt;
+			     sprt = sprt->u.next) {
+				if (sprt->u.dst.obsolete <= 0 &&
+				    sprt->u.dst.error == 0 &&
+				    !rt6_check_expired(sprt)) {
+					match = sprt;
+					break;
+				}
+				if (sprt == rt6_dflt_pointer)
+					break;
+			}
+		}
+	}
+
+	if (match) {
+		if (rt6_dflt_pointer != match)
+			RT6_TRACE("changed default router: %p->%p\n",
+				  rt6_dflt_pointer, match);
+		rt6_dflt_pointer = match;
+	}
+	spin_unlock(&rt6_dflt_lock);
+
+	if (!match) {
+		/*
+		 * Last Resort: if no default routers found, 
+		 * use addrconf default route.
+		 * We don't record this route.
+		 */
+		for (sprt = ip6_routing_table.leaf;
+		     sprt; sprt = sprt->u.next) {
+			if (!rt6_check_expired(sprt) &&
+			    (sprt->rt6i_flags & RTF_DEFAULT) &&
+			    (!oif ||
+			     (sprt->rt6i_dev &&
+			      sprt->rt6i_dev->ifindex == oif))) {
+				match = sprt;
+				break;
+			}
+		}
+		if (!match) {
+			/* no default route.  give up. */
+			match = &ip6_null_entry;
+		}
+	}
+
+	return match;
+}
+
+struct rt6_info *rt6_lookup(struct in6_addr *daddr, struct in6_addr *saddr,
+			    int oif, int strict)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt;
+
+	read_lock_bh(&rt6_lock);
+	fn = fib6_lookup(&ip6_routing_table, daddr, saddr);
+	rt = rt6_device_match(fn->leaf, oif, strict);
+	dst_hold(&rt->u.dst);
+	rt->u.dst.__use++;
+	read_unlock_bh(&rt6_lock);
+
+	rt->u.dst.lastuse = jiffies;
+	if (rt->u.dst.error == 0)
+		return rt;
+	dst_release(&rt->u.dst);
+	return NULL;
+}
+
+/* ip6_ins_rt is called with FREE rt6_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.
+ */
+
+int ip6_ins_rt(struct rt6_info *rt, struct nlmsghdr *nlh, void *_rtattr)
+{
+	int err;
+
+	write_lock_bh(&rt6_lock);
+	err = fib6_add(&ip6_routing_table, rt, nlh, _rtattr);
+	write_unlock_bh(&rt6_lock);
+
+	return err;
+}
+
+/* No rt6_lock! If COW failed, the function returns dead route entry
+   with dst->error set to errno value.
+ */
+
+static struct rt6_info *rt6_cow(struct rt6_info *ort, struct in6_addr *daddr,
+				struct in6_addr *saddr)
+{
+	int err;
+	struct rt6_info *rt;
+
+	/*
+	 *	Clone the route.
+	 */
+
+	rt = ip6_rt_copy(ort);
+
+	if (rt) {
+		ipv6_addr_copy(&rt->rt6i_dst.addr, daddr);
+
+		if (!(rt->rt6i_flags&RTF_GATEWAY))
+			ipv6_addr_copy(&rt->rt6i_gateway, daddr);
+
+		rt->rt6i_dst.plen = 128;
+		rt->rt6i_flags |= RTF_CACHE;
+		rt->u.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
+
+		rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+
+		dst_hold(&rt->u.dst);
+
+		err = ip6_ins_rt(rt, NULL, NULL);
+		if (err == 0)
+			return rt;
+
+		rt->u.dst.error = err;
+
+		return rt;
+	}
+	dst_hold(&ip6_null_entry.u.dst);
+	return &ip6_null_entry;
+}
+
+#define BACKTRACK() \
+if (rt == &ip6_null_entry && strict) { \
+       while ((fn = fn->parent) != NULL) { \
+		if (fn->fn_flags & RTN_ROOT) { \
+			dst_hold(&rt->u.dst); \
+			goto out; \
+		} \
+		if (fn->fn_flags & RTN_RTINFO) \
+			goto restart; \
+	} \
+}
+
+
+void ip6_route_input(struct sk_buff *skb)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt;
+	int strict;
+	int attempts = 3;
+
+	strict = ipv6_addr_type(&skb->nh.ipv6h->daddr) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL);
+
+relookup:
+	read_lock_bh(&rt6_lock);
+
+	fn = fib6_lookup(&ip6_routing_table, &skb->nh.ipv6h->daddr,
+			 &skb->nh.ipv6h->saddr);
+
+restart:
+	rt = fn->leaf;
+
+	if ((rt->rt6i_flags & RTF_CACHE)) {
+		rt = rt6_device_match(rt, skb->dev->ifindex, strict);
+		BACKTRACK();
+		dst_hold(&rt->u.dst);
+		goto out;
+	}
+
+	rt = rt6_device_match(rt, skb->dev->ifindex, 0);
+	BACKTRACK();
+
+	if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
+		struct rt6_info *nrt;
+		dst_hold(&rt->u.dst);
+		read_unlock_bh(&rt6_lock);
+
+		nrt = rt6_cow(rt, &skb->nh.ipv6h->daddr,
+			      &skb->nh.ipv6h->saddr);
+
+		dst_release(&rt->u.dst);
+		rt = nrt;
+
+		if (rt->u.dst.error != -EEXIST || --attempts <= 0)
+			goto out2;
+
+		/* Race condition! In the gap, when rt6_lock was
+		   released someone could insert this route.  Relookup.
+		*/
+		dst_release(&rt->u.dst);
+		goto relookup;
+	}
+	dst_hold(&rt->u.dst);
+
+out:
+	read_unlock_bh(&rt6_lock);
+out2:
+	rt->u.dst.lastuse = jiffies;
+	rt->u.dst.__use++;
+	skb->dst = (struct dst_entry *) rt;
+}
+
+struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt;
+	int strict;
+	int attempts = 3;
+
+	strict = ipv6_addr_type(&fl->fl6_dst) & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL);
+
+relookup:
+	read_lock_bh(&rt6_lock);
+
+	fn = fib6_lookup(&ip6_routing_table, &fl->fl6_dst, &fl->fl6_src);
+
+restart:
+	rt = fn->leaf;
+
+	if ((rt->rt6i_flags & RTF_CACHE)) {
+		rt = rt6_device_match(rt, fl->oif, strict);
+		BACKTRACK();
+		dst_hold(&rt->u.dst);
+		goto out;
+	}
+	if (rt->rt6i_flags & RTF_DEFAULT) {
+		if (rt->rt6i_metric >= IP6_RT_PRIO_ADDRCONF)
+			rt = rt6_best_dflt(rt, fl->oif);
+	} else {
+		rt = rt6_device_match(rt, fl->oif, strict);
+		BACKTRACK();
+	}
+
+	if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
+		struct rt6_info *nrt;
+		dst_hold(&rt->u.dst);
+		read_unlock_bh(&rt6_lock);
+
+		nrt = rt6_cow(rt, &fl->fl6_dst, &fl->fl6_src);
+
+		dst_release(&rt->u.dst);
+		rt = nrt;
+
+		if (rt->u.dst.error != -EEXIST || --attempts <= 0)
+			goto out2;
+
+		/* Race condition! In the gap, when rt6_lock was
+		   released someone could insert this route.  Relookup.
+		*/
+		dst_release(&rt->u.dst);
+		goto relookup;
+	}
+	dst_hold(&rt->u.dst);
+
+out:
+	read_unlock_bh(&rt6_lock);
+out2:
+	rt->u.dst.lastuse = jiffies;
+	rt->u.dst.__use++;
+	return &rt->u.dst;
+}
+
+
+/*
+ *	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 && 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)
+			ip6_del_rt(rt, NULL, NULL);
+		else
+			dst_release(dst);
+	}
+	return NULL;
+}
+
+static void ip6_link_failure(struct sk_buff *skb)
+{
+	struct rt6_info *rt;
+
+	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0, skb->dev);
+
+	rt = (struct rt6_info *) skb->dst;
+	if (rt) {
+		if (rt->rt6i_flags&RTF_CACHE) {
+			dst_set_expires(&rt->u.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;
+	}
+}
+
+/* Protected by rt6_lock.  */
+static struct dst_entry *ndisc_dst_gc_list;
+static int ipv6_get_mtu(struct net_device *dev);
+
+static inline unsigned int ipv6_advmss(unsigned int mtu)
+{
+	mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
+
+	if (mtu < ip6_rt_min_advmss)
+		mtu = 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;
+}
+
+struct dst_entry *ndisc_dst_alloc(struct net_device *dev, 
+				  struct neighbour *neigh,
+				  struct in6_addr *addr,
+				  int (*output)(struct sk_buff *))
+{
+	struct rt6_info *rt;
+	struct inet6_dev *idev = in6_dev_get(dev);
+
+	if (unlikely(idev == NULL))
+		return NULL;
+
+	rt = ip6_dst_alloc();
+	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);
+
+	rt->rt6i_dev	  = dev;
+	rt->rt6i_idev     = idev;
+	rt->rt6i_nexthop  = neigh;
+	atomic_set(&rt->u.dst.__refcnt, 1);
+	rt->u.dst.metrics[RTAX_HOPLIMIT-1] = 255;
+	rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
+	rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&rt->u.dst));
+	rt->u.dst.output  = output;
+
+#if 0	/* there's no chance to use these for ndisc */
+	rt->u.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
+
+	write_lock_bh(&rt6_lock);
+	rt->u.dst.next = ndisc_dst_gc_list;
+	ndisc_dst_gc_list = &rt->u.dst;
+	write_unlock_bh(&rt6_lock);
+
+	fib6_force_start_gc();
+
+out:
+	return (struct dst_entry *)rt;
+}
+
+int ndisc_dst_gc(int *more)
+{
+	struct dst_entry *dst, *next, **pprev;
+	int freed;
+
+	next = NULL;
+	pprev = &ndisc_dst_gc_list;
+	freed = 0;
+	while ((dst = *pprev) != NULL) {
+		if (!atomic_read(&dst->__refcnt)) {
+			*pprev = dst->next;
+			dst_free(dst);
+			freed++;
+		} else {
+			pprev = &dst->next;
+			(*more)++;
+		}
+	}
+
+	return freed;
+}
+
+static int ip6_dst_gc(void)
+{
+	static unsigned expire = 30*HZ;
+	static unsigned long last_gc;
+	unsigned long now = jiffies;
+
+	if (time_after(last_gc + ip6_rt_gc_min_interval, now) &&
+	    atomic_read(&ip6_dst_ops.entries) <= ip6_rt_max_size)
+		goto out;
+
+	expire++;
+	fib6_run_gc(expire);
+	last_gc = now;
+	if (atomic_read(&ip6_dst_ops.entries) < ip6_dst_ops.gc_thresh)
+		expire = ip6_rt_gc_timeout>>1;
+
+out:
+	expire -= expire>>ip6_rt_gc_elasticity;
+	return (atomic_read(&ip6_dst_ops.entries) > ip6_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;
+
+	idev = in6_dev_get(dev);
+	if (idev) {
+		mtu = idev->cnf.mtu6;
+		in6_dev_put(idev);
+	}
+	return mtu;
+}
+
+int ipv6_get_hoplimit(struct net_device *dev)
+{
+	int hoplimit = ipv6_devconf.hop_limit;
+	struct inet6_dev *idev;
+
+	idev = in6_dev_get(dev);
+	if (idev) {
+		hoplimit = idev->cnf.hop_limit;
+		in6_dev_put(idev);
+	}
+	return hoplimit;
+}
+
+/*
+ *
+ */
+
+int ip6_route_add(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh, void *_rtattr)
+{
+	int err;
+	struct rtmsg *r;
+	struct rtattr **rta;
+	struct rt6_info *rt = NULL;
+	struct net_device *dev = NULL;
+	struct inet6_dev *idev = NULL;
+	int addr_type;
+
+	rta = (struct rtattr **) _rtattr;
+
+	if (rtmsg->rtmsg_dst_len > 128 || rtmsg->rtmsg_src_len > 128)
+		return -EINVAL;
+#ifndef CONFIG_IPV6_SUBTREES
+	if (rtmsg->rtmsg_src_len)
+		return -EINVAL;
+#endif
+	if (rtmsg->rtmsg_ifindex) {
+		err = -ENODEV;
+		dev = dev_get_by_index(rtmsg->rtmsg_ifindex);
+		if (!dev)
+			goto out;
+		idev = in6_dev_get(dev);
+		if (!idev)
+			goto out;
+	}
+
+	if (rtmsg->rtmsg_metric == 0)
+		rtmsg->rtmsg_metric = IP6_RT_PRIO_USER;
+
+	rt = ip6_dst_alloc();
+
+	if (rt == NULL) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	rt->u.dst.obsolete = -1;
+	rt->rt6i_expires = clock_t_to_jiffies(rtmsg->rtmsg_info);
+	if (nlh && (r = NLMSG_DATA(nlh))) {
+		rt->rt6i_protocol = r->rtm_protocol;
+	} else {
+		rt->rt6i_protocol = RTPROT_BOOT;
+	}
+
+	addr_type = ipv6_addr_type(&rtmsg->rtmsg_dst);
+
+	if (addr_type & IPV6_ADDR_MULTICAST)
+		rt->u.dst.input = ip6_mc_input;
+	else
+		rt->u.dst.input = ip6_forward;
+
+	rt->u.dst.output = ip6_output;
+
+	ipv6_addr_prefix(&rt->rt6i_dst.addr, 
+			 &rtmsg->rtmsg_dst, rtmsg->rtmsg_dst_len);
+	rt->rt6i_dst.plen = rtmsg->rtmsg_dst_len;
+	if (rt->rt6i_dst.plen == 128)
+	       rt->u.dst.flags = DST_HOST;
+
+#ifdef CONFIG_IPV6_SUBTREES
+	ipv6_addr_prefix(&rt->rt6i_src.addr, 
+			 &rtmsg->rtmsg_src, rtmsg->rtmsg_src_len);
+	rt->rt6i_src.plen = rtmsg->rtmsg_src_len;
+#endif
+
+	rt->rt6i_metric = rtmsg->rtmsg_metric;
+
+	/* We cannot add true routes via loopback here,
+	   they would result in kernel looping; promote them to reject routes
+	 */
+	if ((rtmsg->rtmsg_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 != &loopback_dev) {
+			if (dev) {
+				dev_put(dev);
+				in6_dev_put(idev);
+			}
+			dev = &loopback_dev;
+			dev_hold(dev);
+			idev = in6_dev_get(dev);
+			if (!idev) {
+				err = -ENODEV;
+				goto out;
+			}
+		}
+		rt->u.dst.output = ip6_pkt_discard_out;
+		rt->u.dst.input = ip6_pkt_discard;
+		rt->u.dst.error = -ENETUNREACH;
+		rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
+		goto install_route;
+	}
+
+	if (rtmsg->rtmsg_flags & RTF_GATEWAY) {
+		struct in6_addr *gw_addr;
+		int gwa_type;
+
+		gw_addr = &rtmsg->rtmsg_gateway;
+		ipv6_addr_copy(&rt->rt6i_gateway, &rtmsg->rtmsg_gateway);
+		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(gw_addr, NULL, rtmsg->rtmsg_ifindex, 1);
+
+			err = -EHOSTUNREACH;
+			if (grt == NULL)
+				goto out;
+			if (dev) {
+				if (dev != grt->rt6i_dev) {
+					dst_release(&grt->u.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->u.dst);
+
+			if (err)
+				goto out;
+		}
+		err = -EINVAL;
+		if (dev == NULL || (dev->flags&IFF_LOOPBACK))
+			goto out;
+	}
+
+	err = -ENODEV;
+	if (dev == NULL)
+		goto out;
+
+	if (rtmsg->rtmsg_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 = rtmsg->rtmsg_flags;
+
+install_route:
+	if (rta && rta[RTA_METRICS-1]) {
+		int attrlen = RTA_PAYLOAD(rta[RTA_METRICS-1]);
+		struct rtattr *attr = RTA_DATA(rta[RTA_METRICS-1]);
+
+		while (RTA_OK(attr, attrlen)) {
+			unsigned flavor = attr->rta_type;
+			if (flavor) {
+				if (flavor > RTAX_MAX) {
+					err = -EINVAL;
+					goto out;
+				}
+				rt->u.dst.metrics[flavor-1] =
+					*(u32 *)RTA_DATA(attr);
+			}
+			attr = RTA_NEXT(attr, attrlen);
+		}
+	}
+
+	if (rt->u.dst.metrics[RTAX_HOPLIMIT-1] == 0)
+		rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1;
+	if (!rt->u.dst.metrics[RTAX_MTU-1])
+		rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(dev);
+	if (!rt->u.dst.metrics[RTAX_ADVMSS-1])
+		rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&rt->u.dst));
+	rt->u.dst.dev = dev;
+	rt->rt6i_idev = idev;
+	return ip6_ins_rt(rt, nlh, _rtattr);
+
+out:
+	if (dev)
+		dev_put(dev);
+	if (idev)
+		in6_dev_put(idev);
+	if (rt)
+		dst_free((struct dst_entry *) rt);
+	return err;
+}
+
+int ip6_del_rt(struct rt6_info *rt, struct nlmsghdr *nlh, void *_rtattr)
+{
+	int err;
+
+	write_lock_bh(&rt6_lock);
+
+	rt6_reset_dflt_pointer(NULL);
+
+	err = fib6_del(rt, nlh, _rtattr);
+	dst_release(&rt->u.dst);
+
+	write_unlock_bh(&rt6_lock);
+
+	return err;
+}
+
+static int ip6_route_del(struct in6_rtmsg *rtmsg, struct nlmsghdr *nlh, void *_rtattr)
+{
+	struct fib6_node *fn;
+	struct rt6_info *rt;
+	int err = -ESRCH;
+
+	read_lock_bh(&rt6_lock);
+
+	fn = fib6_locate(&ip6_routing_table,
+			 &rtmsg->rtmsg_dst, rtmsg->rtmsg_dst_len,
+			 &rtmsg->rtmsg_src, rtmsg->rtmsg_src_len);
+	
+	if (fn) {
+		for (rt = fn->leaf; rt; rt = rt->u.next) {
+			if (rtmsg->rtmsg_ifindex &&
+			    (rt->rt6i_dev == NULL ||
+			     rt->rt6i_dev->ifindex != rtmsg->rtmsg_ifindex))
+				continue;
+			if (rtmsg->rtmsg_flags&RTF_GATEWAY &&
+			    !ipv6_addr_equal(&rtmsg->rtmsg_gateway, &rt->rt6i_gateway))
+				continue;
+			if (rtmsg->rtmsg_metric &&
+			    rtmsg->rtmsg_metric != rt->rt6i_metric)
+				continue;
+			dst_hold(&rt->u.dst);
+			read_unlock_bh(&rt6_lock);
+
+			return ip6_del_rt(rt, nlh, _rtattr);
+		}
+	}
+	read_unlock_bh(&rt6_lock);
+
+	return err;
+}
+
+/*
+ *	Handle redirects
+ */
+void rt6_redirect(struct in6_addr *dest, struct in6_addr *saddr,
+		  struct neighbour *neigh, u8 *lladdr, int on_link)
+{
+	struct rt6_info *rt, *nrt;
+
+	/* Locate old route to this destination. */
+	rt = rt6_lookup(dest, NULL, neigh->dev->ifindex, 1);
+
+	if (rt == NULL)
+		return;
+
+	if (neigh->dev != rt->rt6i_dev)
+		goto out;
+
+	/*
+	 * 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 (!(rt->rt6i_flags&RTF_GATEWAY))
+		goto out;
+
+	/*
+	 *	RFC 2461 specifies that redirects should only be
+	 *	accepted if they come from the nexthop to the target.
+	 *	Due to the way default routers are chosen, this notion
+	 *	is a bit fuzzy and one might need to check all default
+	 *	routers.
+	 */
+	if (!ipv6_addr_equal(saddr, &rt->rt6i_gateway)) {
+		if (rt->rt6i_flags & RTF_DEFAULT) {
+			struct rt6_info *rt1;
+
+			read_lock(&rt6_lock);
+			for (rt1 = ip6_routing_table.leaf; rt1; rt1 = rt1->u.next) {
+				if (ipv6_addr_equal(saddr, &rt1->rt6i_gateway)) {
+					dst_hold(&rt1->u.dst);
+					dst_release(&rt->u.dst);
+					read_unlock(&rt6_lock);
+					rt = rt1;
+					goto source_ok;
+				}
+			}
+			read_unlock(&rt6_lock);
+		}
+		if (net_ratelimit())
+			printk(KERN_DEBUG "rt6_redirect: source isn't a valid nexthop "
+			       "for redirect target\n");
+		goto out;
+	}
+
+source_ok:
+
+	/*
+	 *	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->u.dst);
+
+	/* Duplicate redirect: silently ignore. */
+	if (neigh == rt->u.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->u.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->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(neigh->dev);
+	nrt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&nrt->u.dst));
+
+	if (ip6_ins_rt(nrt, NULL, NULL))
+		goto out;
+
+	if (rt->rt6i_flags&RTF_CACHE) {
+		ip6_del_rt(rt, NULL, NULL);
+		return;
+	}
+
+out:
+        dst_release(&rt->u.dst);
+	return;
+}
+
+/*
+ *	Handle ICMP "packet too big" messages
+ *	i.e. Path MTU discovery
+ */
+
+void rt6_pmtu_discovery(struct in6_addr *daddr, struct in6_addr *saddr,
+			struct net_device *dev, u32 pmtu)
+{
+	struct rt6_info *rt, *nrt;
+	int allfrag = 0;
+
+	rt = rt6_lookup(daddr, saddr, dev->ifindex, 0);
+	if (rt == NULL)
+		return;
+
+	if (pmtu >= dst_mtu(&rt->u.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->u.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->u.dst.metrics[RTAX_MTU-1] = pmtu;
+		if (allfrag)
+			rt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
+		dst_set_expires(&rt->u.dst, 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_cow(rt, daddr, saddr);
+		if (!nrt->u.dst.error) {
+			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.
+			 */
+			dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires);
+			nrt->rt6i_flags |= RTF_DYNAMIC|RTF_EXPIRES;
+		}
+		dst_release(&nrt->u.dst);
+	} else {
+		nrt = ip6_rt_copy(rt);
+		if (nrt == NULL)
+			goto out;
+		ipv6_addr_copy(&nrt->rt6i_dst.addr, daddr);
+		nrt->rt6i_dst.plen = 128;
+		nrt->u.dst.flags |= DST_HOST;
+		nrt->rt6i_nexthop = neigh_clone(rt->rt6i_nexthop);
+		dst_set_expires(&nrt->u.dst, ip6_rt_mtu_expires);
+		nrt->rt6i_flags |= RTF_DYNAMIC|RTF_CACHE|RTF_EXPIRES;
+		nrt->u.dst.metrics[RTAX_MTU-1] = pmtu;
+		if (allfrag)
+			nrt->u.dst.metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;
+		ip6_ins_rt(nrt, NULL, NULL);
+	}
+
+out:
+	dst_release(&rt->u.dst);
+}
+
+/*
+ *	Misc support functions
+ */
+
+static struct rt6_info * ip6_rt_copy(struct rt6_info *ort)
+{
+	struct rt6_info *rt = ip6_dst_alloc();
+
+	if (rt) {
+		rt->u.dst.input = ort->u.dst.input;
+		rt->u.dst.output = ort->u.dst.output;
+
+		memcpy(rt->u.dst.metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32));
+		rt->u.dst.dev = ort->u.dst.dev;
+		if (rt->u.dst.dev)
+			dev_hold(rt->u.dst.dev);
+		rt->rt6i_idev = ort->rt6i_idev;
+		if (rt->rt6i_idev)
+			in6_dev_hold(rt->rt6i_idev);
+		rt->u.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
+	}
+	return rt;
+}
+
+struct rt6_info *rt6_get_dflt_router(struct in6_addr *addr, struct net_device *dev)
+{	
+	struct rt6_info *rt;
+	struct fib6_node *fn;
+
+	fn = &ip6_routing_table;
+
+	write_lock_bh(&rt6_lock);
+	for (rt = fn->leaf; rt; rt=rt->u.next) {
+		if (dev == rt->rt6i_dev &&
+		    ipv6_addr_equal(&rt->rt6i_gateway, addr))
+			break;
+	}
+	if (rt)
+		dst_hold(&rt->u.dst);
+	write_unlock_bh(&rt6_lock);
+	return rt;
+}
+
+struct rt6_info *rt6_add_dflt_router(struct in6_addr *gwaddr,
+				     struct net_device *dev)
+{
+	struct in6_rtmsg rtmsg;
+
+	memset(&rtmsg, 0, sizeof(struct in6_rtmsg));
+	rtmsg.rtmsg_type = RTMSG_NEWROUTE;
+	ipv6_addr_copy(&rtmsg.rtmsg_gateway, gwaddr);
+	rtmsg.rtmsg_metric = 1024;
+	rtmsg.rtmsg_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | RTF_UP | RTF_EXPIRES;
+
+	rtmsg.rtmsg_ifindex = dev->ifindex;
+
+	ip6_route_add(&rtmsg, NULL, NULL);
+	return rt6_get_dflt_router(gwaddr, dev);
+}
+
+void rt6_purge_dflt_routers(void)
+{
+	struct rt6_info *rt;
+
+restart:
+	read_lock_bh(&rt6_lock);
+	for (rt = ip6_routing_table.leaf; rt; rt = rt->u.next) {
+		if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) {
+			dst_hold(&rt->u.dst);
+
+			rt6_reset_dflt_pointer(NULL);
+
+			read_unlock_bh(&rt6_lock);
+
+			ip6_del_rt(rt, NULL, NULL);
+
+			goto restart;
+		}
+	}
+	read_unlock_bh(&rt6_lock);
+}
+
+int ipv6_route_ioctl(unsigned int cmd, void __user *arg)
+{
+	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;
+			
+		rtnl_lock();
+		switch (cmd) {
+		case SIOCADDRT:
+			err = ip6_route_add(&rtmsg, NULL, NULL);
+			break;
+		case SIOCDELRT:
+			err = ip6_route_del(&rtmsg, NULL, NULL);
+			break;
+		default:
+			err = -EINVAL;
+		}
+		rtnl_unlock();
+
+		return err;
+	};
+
+	return -EINVAL;
+}
+
+/*
+ *	Drop the packet on the floor
+ */
+
+int ip6_pkt_discard(struct sk_buff *skb)
+{
+	IP6_INC_STATS(IPSTATS_MIB_OUTNOROUTES);
+	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_NOROUTE, 0, skb->dev);
+	kfree_skb(skb);
+	return 0;
+}
+
+int ip6_pkt_discard_out(struct sk_buff *skb)
+{
+	skb->dev = skb->dst->dev;
+	return ip6_pkt_discard(skb);
+}
+
+/*
+ *	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 rt6_info *rt = ip6_dst_alloc();
+
+	if (rt == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	dev_hold(&loopback_dev);
+	in6_dev_hold(idev);
+
+	rt->u.dst.flags = DST_HOST;
+	rt->u.dst.input = ip6_input;
+	rt->u.dst.output = ip6_output;
+	rt->rt6i_dev = &loopback_dev;
+	rt->rt6i_idev = idev;
+	rt->u.dst.metrics[RTAX_MTU-1] = ipv6_get_mtu(rt->rt6i_dev);
+	rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(dst_mtu(&rt->u.dst));
+	rt->u.dst.metrics[RTAX_HOPLIMIT-1] = -1;
+	rt->u.dst.obsolete = -1;
+
+	rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
+	if (!anycast)
+		rt->rt6i_flags |= RTF_LOCAL;
+	rt->rt6i_nexthop = ndisc_get_neigh(rt->rt6i_dev, &rt->rt6i_gateway);
+	if (rt->rt6i_nexthop == NULL) {
+		dst_free((struct dst_entry *) rt);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	ipv6_addr_copy(&rt->rt6i_dst.addr, addr);
+	rt->rt6i_dst.plen = 128;
+
+	atomic_set(&rt->u.dst.__refcnt, 1);
+
+	return rt;
+}
+
+static int fib6_ifdown(struct rt6_info *rt, void *arg)
+{
+	if (((void*)rt->rt6i_dev == arg || arg == NULL) &&
+	    rt != &ip6_null_entry) {
+		RT6_TRACE("deleted by ifdown %p\n", rt);
+		return -1;
+	}
+	return 0;
+}
+
+void rt6_ifdown(struct net_device *dev)
+{
+	write_lock_bh(&rt6_lock);
+	fib6_clean_tree(&ip6_routing_table, fib6_ifdown, 0, dev);
+	write_unlock_bh(&rt6_lock);
+}
+
+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;
+
+	/* 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->u.dst, RTAX_MTU) &&
+            (dst_mtu(&rt->u.dst) > arg->mtu ||
+             (dst_mtu(&rt->u.dst) < arg->mtu &&
+	      dst_mtu(&rt->u.dst) == idev->cnf.mtu6)))
+		rt->u.dst.metrics[RTAX_MTU-1] = arg->mtu;
+	rt->u.dst.metrics[RTAX_ADVMSS-1] = ipv6_advmss(arg->mtu);
+	return 0;
+}
+
+void rt6_mtu_change(struct net_device *dev, unsigned mtu)
+{
+	struct rt6_mtu_change_arg arg;
+
+	arg.dev = dev;
+	arg.mtu = mtu;
+	read_lock_bh(&rt6_lock);
+	fib6_clean_tree(&ip6_routing_table, rt6_mtu_change_route, 0, &arg);
+	read_unlock_bh(&rt6_lock);
+}
+
+static int inet6_rtm_to_rtmsg(struct rtmsg *r, struct rtattr **rta,
+			      struct in6_rtmsg *rtmsg)
+{
+	memset(rtmsg, 0, sizeof(*rtmsg));
+
+	rtmsg->rtmsg_dst_len = r->rtm_dst_len;
+	rtmsg->rtmsg_src_len = r->rtm_src_len;
+	rtmsg->rtmsg_flags = RTF_UP;
+	if (r->rtm_type == RTN_UNREACHABLE)
+		rtmsg->rtmsg_flags |= RTF_REJECT;
+
+	if (rta[RTA_GATEWAY-1]) {
+		if (rta[RTA_GATEWAY-1]->rta_len != RTA_LENGTH(16))
+			return -EINVAL;
+		memcpy(&rtmsg->rtmsg_gateway, RTA_DATA(rta[RTA_GATEWAY-1]), 16);
+		rtmsg->rtmsg_flags |= RTF_GATEWAY;
+	}
+	if (rta[RTA_DST-1]) {
+		if (RTA_PAYLOAD(rta[RTA_DST-1]) < ((r->rtm_dst_len+7)>>3))
+			return -EINVAL;
+		memcpy(&rtmsg->rtmsg_dst, RTA_DATA(rta[RTA_DST-1]), ((r->rtm_dst_len+7)>>3));
+	}
+	if (rta[RTA_SRC-1]) {
+		if (RTA_PAYLOAD(rta[RTA_SRC-1]) < ((r->rtm_src_len+7)>>3))
+			return -EINVAL;
+		memcpy(&rtmsg->rtmsg_src, RTA_DATA(rta[RTA_SRC-1]), ((r->rtm_src_len+7)>>3));
+	}
+	if (rta[RTA_OIF-1]) {
+		if (rta[RTA_OIF-1]->rta_len != RTA_LENGTH(sizeof(int)))
+			return -EINVAL;
+		memcpy(&rtmsg->rtmsg_ifindex, RTA_DATA(rta[RTA_OIF-1]), sizeof(int));
+	}
+	if (rta[RTA_PRIORITY-1]) {
+		if (rta[RTA_PRIORITY-1]->rta_len != RTA_LENGTH(4))
+			return -EINVAL;
+		memcpy(&rtmsg->rtmsg_metric, RTA_DATA(rta[RTA_PRIORITY-1]), 4);
+	}
+	return 0;
+}
+
+int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+{
+	struct rtmsg *r = NLMSG_DATA(nlh);
+	struct in6_rtmsg rtmsg;
+
+	if (inet6_rtm_to_rtmsg(r, arg, &rtmsg))
+		return -EINVAL;
+	return ip6_route_del(&rtmsg, nlh, arg);
+}
+
+int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
+{
+	struct rtmsg *r = NLMSG_DATA(nlh);
+	struct in6_rtmsg rtmsg;
+
+	if (inet6_rtm_to_rtmsg(r, arg, &rtmsg))
+		return -EINVAL;
+	return ip6_route_add(&rtmsg, nlh, arg);
+}
+
+struct rt6_rtnl_dump_arg
+{
+	struct sk_buff *skb;
+	struct netlink_callback *cb;
+};
+
+static int rt6_fill_node(struct sk_buff *skb, struct rt6_info *rt,
+			 struct in6_addr *dst,
+			 struct in6_addr *src,
+			 int iif,
+			 int type, u32 pid, u32 seq,
+			 struct nlmsghdr *in_nlh, int prefix)
+{
+	struct rtmsg *rtm;
+	struct nlmsghdr  *nlh;
+	unsigned char	 *b = skb->tail;
+	struct rta_cacheinfo ci;
+
+	if (prefix) {	/* user wants prefix routes only */
+		if (!(rt->rt6i_flags & RTF_PREFIX_RT)) {
+			/* success since this is not a prefix route */
+			return 1;
+		}
+	}
+
+	if (!pid && in_nlh) {
+		pid = in_nlh->nlmsg_pid;
+	}
+
+	nlh = NLMSG_PUT(skb, pid, seq, type, sizeof(*rtm));
+	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;
+	rtm->rtm_table = RT_TABLE_MAIN;
+	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) {
+		RTA_PUT(skb, RTA_DST, 16, dst);
+	        rtm->rtm_dst_len = 128;
+	} else if (rtm->rtm_dst_len)
+		RTA_PUT(skb, RTA_DST, 16, &rt->rt6i_dst.addr);
+#ifdef CONFIG_IPV6_SUBTREES
+	if (src) {
+		RTA_PUT(skb, RTA_SRC, 16, src);
+	        rtm->rtm_src_len = 128;
+	} else if (rtm->rtm_src_len)
+		RTA_PUT(skb, RTA_SRC, 16, &rt->rt6i_src.addr);
+#endif
+	if (iif)
+		RTA_PUT(skb, RTA_IIF, 4, &iif);
+	else if (dst) {
+		struct in6_addr saddr_buf;
+		if (ipv6_get_saddr(&rt->u.dst, dst, &saddr_buf) == 0)
+			RTA_PUT(skb, RTA_PREFSRC, 16, &saddr_buf);
+	}
+	if (rtnetlink_put_metrics(skb, rt->u.dst.metrics) < 0)
+		goto rtattr_failure;
+	if (rt->u.dst.neighbour)
+		RTA_PUT(skb, RTA_GATEWAY, 16, &rt->u.dst.neighbour->primary_key);
+	if (rt->u.dst.dev)
+		RTA_PUT(skb, RTA_OIF, sizeof(int), &rt->rt6i_dev->ifindex);
+	RTA_PUT(skb, RTA_PRIORITY, 4, &rt->rt6i_metric);
+	ci.rta_lastuse = jiffies_to_clock_t(jiffies - rt->u.dst.lastuse);
+	if (rt->rt6i_expires)
+		ci.rta_expires = jiffies_to_clock_t(rt->rt6i_expires - jiffies);
+	else
+		ci.rta_expires = 0;
+	ci.rta_used = rt->u.dst.__use;
+	ci.rta_clntref = atomic_read(&rt->u.dst.__refcnt);
+	ci.rta_error = rt->u.dst.error;
+	ci.rta_id = 0;
+	ci.rta_ts = 0;
+	ci.rta_tsage = 0;
+	RTA_PUT(skb, RTA_CACHEINFO, sizeof(ci), &ci);
+	nlh->nlmsg_len = skb->tail - b;
+	return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+	skb_trim(skb, b - skb->data);
+	return -1;
+}
+
+static 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 (arg->cb->nlh->nlmsg_len >= NLMSG_LENGTH(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->skb, rt, NULL, NULL, 0, RTM_NEWROUTE,
+		     NETLINK_CB(arg->cb->skb).pid, arg->cb->nlh->nlmsg_seq,
+		     NULL, prefix);
+}
+
+static int fib6_dump_node(struct fib6_walker_t *w)
+{
+	int res;
+	struct rt6_info *rt;
+
+	for (rt = w->leaf; rt; rt = rt->u.next) {
+		res = rt6_dump_route(rt, w->args);
+		if (res < 0) {
+			/* Frame is full, suspend walking */
+			w->leaf = rt;
+			return 1;
+		}
+		BUG_TRAP(res!=0);
+	}
+	w->leaf = NULL;
+	return 0;
+}
+
+static void fib6_dump_end(struct netlink_callback *cb)
+{
+	struct fib6_walker_t *w = (void*)cb->args[0];
+
+	if (w) {
+		cb->args[0] = 0;
+		fib6_walker_unlink(w);
+		kfree(w);
+	}
+	if (cb->args[1]) {
+		cb->done = (void*)cb->args[1];
+		cb->args[1] = 0;
+	}
+}
+
+static int fib6_dump_done(struct netlink_callback *cb)
+{
+	fib6_dump_end(cb);
+	return cb->done(cb);
+}
+
+int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct rt6_rtnl_dump_arg arg;
+	struct fib6_walker_t *w;
+	int res;
+
+	arg.skb = skb;
+	arg.cb = cb;
+
+	w = (void*)cb->args[0];
+	if (w == NULL) {
+		/* New dump:
+		 * 
+		 * 1. hook callback destructor.
+		 */
+		cb->args[1] = (long)cb->done;
+		cb->done = fib6_dump_done;
+
+		/*
+		 * 2. allocate and initialize walker.
+		 */
+		w = kmalloc(sizeof(*w), GFP_ATOMIC);
+		if (w == NULL)
+			return -ENOMEM;
+		RT6_TRACE("dump<%p", w);
+		memset(w, 0, sizeof(*w));
+		w->root = &ip6_routing_table;
+		w->func = fib6_dump_node;
+		w->args = &arg;
+		cb->args[0] = (long)w;
+		read_lock_bh(&rt6_lock);
+		res = fib6_walk(w);
+		read_unlock_bh(&rt6_lock);
+	} else {
+		w->args = &arg;
+		read_lock_bh(&rt6_lock);
+		res = fib6_walk_continue(w);
+		read_unlock_bh(&rt6_lock);
+	}
+#if RT6_DEBUG >= 3
+	if (res <= 0 && skb->len == 0)
+		RT6_TRACE("%p>dump end\n", w);
+#endif
+	res = res < 0 ? res : skb->len;
+	/* res < 0 is an error. (really, impossible)
+	   res == 0 means that dump is complete, but skb still can contain data.
+	   res > 0 dump is not complete, but frame is full.
+	 */
+	/* Destroy walker, if dump of this table is complete. */
+	if (res <= 0)
+		fib6_dump_end(cb);
+	return res;
+}
+
+int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
+{
+	struct rtattr **rta = arg;
+	int iif = 0;
+	int err = -ENOBUFS;
+	struct sk_buff *skb;
+	struct flowi fl;
+	struct rt6_info *rt;
+
+	skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
+	if (skb == NULL)
+		goto out;
+
+	/* Reserve room for dummy headers, this skb can pass
+	   through good chunk of routing engine.
+	 */
+	skb->mac.raw = skb->data;
+	skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
+
+	memset(&fl, 0, sizeof(fl));
+	if (rta[RTA_SRC-1])
+		ipv6_addr_copy(&fl.fl6_src,
+			       (struct in6_addr*)RTA_DATA(rta[RTA_SRC-1]));
+	if (rta[RTA_DST-1])
+		ipv6_addr_copy(&fl.fl6_dst,
+			       (struct in6_addr*)RTA_DATA(rta[RTA_DST-1]));
+
+	if (rta[RTA_IIF-1])
+		memcpy(&iif, RTA_DATA(rta[RTA_IIF-1]), sizeof(int));
+
+	if (iif) {
+		struct net_device *dev;
+		dev = __dev_get_by_index(iif);
+		if (!dev) {
+			err = -ENODEV;
+			goto out_free;
+		}
+	}
+
+	fl.oif = 0;
+	if (rta[RTA_OIF-1])
+		memcpy(&fl.oif, RTA_DATA(rta[RTA_OIF-1]), sizeof(int));
+
+	rt = (struct rt6_info*)ip6_route_output(NULL, &fl);
+
+	skb->dst = &rt->u.dst;
+
+	NETLINK_CB(skb).dst_pid = NETLINK_CB(in_skb).pid;
+	err = rt6_fill_node(skb, rt, 
+			    &fl.fl6_dst, &fl.fl6_src,
+			    iif,
+			    RTM_NEWROUTE, NETLINK_CB(in_skb).pid,
+			    nlh->nlmsg_seq, nlh, 0);
+	if (err < 0) {
+		err = -EMSGSIZE;
+		goto out_free;
+	}
+
+	err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
+	if (err > 0)
+		err = 0;
+out:
+	return err;
+out_free:
+	kfree_skb(skb);
+	goto out;	
+}
+
+void inet6_rt_notify(int event, struct rt6_info *rt, struct nlmsghdr *nlh)
+{
+	struct sk_buff *skb;
+	int size = NLMSG_SPACE(sizeof(struct rtmsg)+256);
+
+	skb = alloc_skb(size, gfp_any());
+	if (!skb) {
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_ROUTE, ENOBUFS);
+		return;
+	}
+	if (rt6_fill_node(skb, rt, NULL, NULL, 0, event, 0, 0, nlh, 0) < 0) {
+		kfree_skb(skb);
+		netlink_set_err(rtnl, 0, RTMGRP_IPV6_ROUTE, EINVAL);
+		return;
+	}
+	NETLINK_CB(skb).dst_groups = RTMGRP_IPV6_ROUTE;
+	netlink_broadcast(rtnl, skb, 0, RTMGRP_IPV6_ROUTE, gfp_any());
+}
+
+/*
+ *	/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 rt6_proc_arg *arg = (struct rt6_proc_arg *) p_arg;
+	int i;
+
+	if (arg->skip < arg->offset / RT6_INFO_LEN) {
+		arg->skip++;
+		return 0;
+	}
+
+	if (arg->len >= arg->length)
+		return 0;
+
+	for (i=0; i<16; i++) {
+		sprintf(arg->buffer + arg->len, "%02x",
+			rt->rt6i_dst.addr.s6_addr[i]);
+		arg->len += 2;
+	}
+	arg->len += sprintf(arg->buffer + arg->len, " %02x ",
+			    rt->rt6i_dst.plen);
+
+#ifdef CONFIG_IPV6_SUBTREES
+	for (i=0; i<16; i++) {
+		sprintf(arg->buffer + arg->len, "%02x",
+			rt->rt6i_src.addr.s6_addr[i]);
+		arg->len += 2;
+	}
+	arg->len += sprintf(arg->buffer + arg->len, " %02x ",
+			    rt->rt6i_src.plen);
+#else
+	sprintf(arg->buffer + arg->len,
+		"00000000000000000000000000000000 00 ");
+	arg->len += 36;
+#endif
+
+	if (rt->rt6i_nexthop) {
+		for (i=0; i<16; i++) {
+			sprintf(arg->buffer + arg->len, "%02x",
+				rt->rt6i_nexthop->primary_key[i]);
+			arg->len += 2;
+		}
+	} else {
+		sprintf(arg->buffer + arg->len,
+			"00000000000000000000000000000000");
+		arg->len += 32;
+	}
+	arg->len += sprintf(arg->buffer + arg->len,
+			    " %08x %08x %08x %08x %8s\n",
+			    rt->rt6i_metric, atomic_read(&rt->u.dst.__refcnt),
+			    rt->u.dst.__use, rt->rt6i_flags, 
+			    rt->rt6i_dev ? rt->rt6i_dev->name : "");
+	return 0;
+}
+
+static int rt6_proc_info(char *buffer, char **start, off_t offset, int length)
+{
+	struct rt6_proc_arg arg;
+	arg.buffer = buffer;
+	arg.offset = offset;
+	arg.length = length;
+	arg.skip = 0;
+	arg.len = 0;
+
+	read_lock_bh(&rt6_lock);
+	fib6_clean_tree(&ip6_routing_table, rt6_info_route, 0, &arg);
+	read_unlock_bh(&rt6_lock);
+
+	*start = buffer;
+	if (offset)
+		*start += offset % RT6_INFO_LEN;
+
+	arg.len -= offset % RT6_INFO_LEN;
+
+	if (arg.len > length)
+		arg.len = length;
+	if (arg.len < 0)
+		arg.len = 0;
+
+	return arg.len;
+}
+
+extern struct rt6_statistics rt6_stats;
+
+static int rt6_stats_seq_show(struct seq_file *seq, void *v)
+{
+	seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n",
+		      rt6_stats.fib_nodes, rt6_stats.fib_route_nodes,
+		      rt6_stats.fib_rt_alloc, rt6_stats.fib_rt_entries,
+		      rt6_stats.fib_rt_cache,
+		      atomic_read(&ip6_dst_ops.entries),
+		      rt6_stats.fib_discarded_routes);
+
+	return 0;
+}
+
+static int rt6_stats_seq_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rt6_stats_seq_show, NULL);
+}
+
+static struct file_operations rt6_stats_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = rt6_stats_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = single_release,
+};
+#endif	/* CONFIG_PROC_FS */
+
+#ifdef CONFIG_SYSCTL
+
+static int flush_delay;
+
+static
+int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, struct file * filp,
+			      void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+	if (write) {
+		proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+		fib6_run_gc(flush_delay <= 0 ? ~0UL : (unsigned long)flush_delay);
+		return 0;
+	} else
+		return -EINVAL;
+}
+
+ctl_table ipv6_route_table[] = {
+        {
+		.ctl_name	=	NET_IPV6_ROUTE_FLUSH, 
+		.procname	=	"flush",
+         	.data		=	&flush_delay,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&ipv6_sysctl_rtcache_flush
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_GC_THRESH,
+		.procname	=	"gc_thresh",
+         	.data		=	&ip6_dst_ops.gc_thresh,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_MAX_SIZE,
+		.procname	=	"max_size",
+         	.data		=	&ip6_rt_max_size,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_GC_MIN_INTERVAL,
+		.procname	=	"gc_min_interval",
+         	.data		=	&ip6_rt_gc_min_interval,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec_jiffies,
+		.strategy	=	&sysctl_jiffies,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_GC_TIMEOUT,
+		.procname	=	"gc_timeout",
+         	.data		=	&ip6_rt_gc_timeout,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec_jiffies,
+		.strategy	=	&sysctl_jiffies,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_GC_INTERVAL,
+		.procname	=	"gc_interval",
+         	.data		=	&ip6_rt_gc_interval,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec_jiffies,
+		.strategy	=	&sysctl_jiffies,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_GC_ELASTICITY,
+		.procname	=	"gc_elasticity",
+         	.data		=	&ip6_rt_gc_elasticity,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec_jiffies,
+		.strategy	=	&sysctl_jiffies,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_MTU_EXPIRES,
+		.procname	=	"mtu_expires",
+         	.data		=	&ip6_rt_mtu_expires,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec_jiffies,
+		.strategy	=	&sysctl_jiffies,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_MIN_ADVMSS,
+		.procname	=	"min_adv_mss",
+         	.data		=	&ip6_rt_min_advmss,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec_jiffies,
+		.strategy	=	&sysctl_jiffies,
+	},
+	{
+		.ctl_name	=	NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS,
+		.procname	=	"gc_min_interval_ms",
+         	.data		=	&ip6_rt_gc_min_interval,
+		.maxlen		=	sizeof(int),
+		.mode		=	0644,
+         	.proc_handler	=	&proc_dointvec_ms_jiffies,
+		.strategy	=	&sysctl_ms_jiffies,
+	},
+	{ .ctl_name = 0 }
+};
+
+#endif
+
+void __init ip6_route_init(void)
+{
+	struct proc_dir_entry *p;
+
+	ip6_dst_ops.kmem_cachep = kmem_cache_create("ip6_dst_cache",
+						     sizeof(struct rt6_info),
+						     0, SLAB_HWCACHE_ALIGN,
+						     NULL, NULL);
+	if (!ip6_dst_ops.kmem_cachep)
+		panic("cannot create ip6_dst_cache");
+
+	fib6_init();
+#ifdef 	CONFIG_PROC_FS
+	p = proc_net_create("ipv6_route", 0, rt6_proc_info);
+	if (p)
+		p->owner = THIS_MODULE;
+
+	proc_net_fops_create("rt6_stats", S_IRUGO, &rt6_stats_seq_fops);
+#endif
+#ifdef CONFIG_XFRM
+	xfrm6_init();
+#endif
+}
+
+void ip6_route_cleanup(void)
+{
+#ifdef CONFIG_PROC_FS
+	proc_net_remove("ipv6_route");
+	proc_net_remove("rt6_stats");
+#endif
+#ifdef CONFIG_XFRM
+	xfrm6_fini();
+#endif
+	rt6_ifdown(NULL);
+	fib6_gc_cleanup();
+	kmem_cache_destroy(ip6_dst_ops.kmem_cachep);
+}