Release 4.8 net/ipv6/route.c

Directory: net/ipv6
/*
 *      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.
 */


#define pr_fmt(fmt) "IPv6: " fmt

#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/export.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/dst_metadata.h>
#include <net/xfrm.h>
#include <net/netevent.h>
#include <net/netlink.h>
#include <net/nexthop.h>
#include <net/lwtunnel.h>
#include <net/ip_tunnels.h>
#include <net/l3mdev.h>
#include <trace/events/fib6.h>

#include <asm/uaccess.h>

#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif


enum rt6_nud_state {
	
RT6_NUD_FAIL_HARD = -3,
	
RT6_NUD_FAIL_PROBE = -2,
	
RT6_NUD_FAIL_DO_RR = -1,
	
RT6_NUD_SUCCEED = 1
};

static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort);
static struct dst_entry	*ip6_dst_check(struct dst_entry *dst, u32 cookie);
static unsigned int	 ip6_default_advmss(const struct dst_entry *dst);
static unsigned int	 ip6_mtu(const struct dst_entry *dst);
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 net *net, struct sock *sk, struct sk_buff *skb);
static int		ip6_pkt_prohibit(struct sk_buff *skb);
static int		ip6_pkt_prohibit_out(struct net *net, struct sock *sk, struct sk_buff *skb);
static void		ip6_link_failure(struct sk_buff *skb);
static void		ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
					   struct sk_buff *skb, u32 mtu);
static void		rt6_do_redirect(struct dst_entry *dst, struct sock *sk,
					struct sk_buff *skb);
static void		rt6_dst_from_metrics_check(struct rt6_info *rt);
static int rt6_score_route(struct rt6_info *rt, int oif, int strict);

#ifdef CONFIG_IPV6_ROUTE_INFO
static struct rt6_info *rt6_add_route_info(struct net *net,
					   const struct in6_addr *prefix, int prefixlen,
					   const struct in6_addr *gwaddr, int ifindex,
					   unsigned int pref);
static struct rt6_info *rt6_get_route_info(struct net *net,
					   const struct in6_addr *prefix, int prefixlen,
					   const struct in6_addr *gwaddr, int ifindex);
#endif


struct uncached_list {
	
spinlock_t		lock;
	
struct list_head	head;
};

static DEFINE_PER_CPU_ALIGNED(struct uncached_list, rt6_uncached_list);



static void rt6_uncached_list_add(struct rt6_info *rt)
{
	struct uncached_list *ul = raw_cpu_ptr(&rt6_uncached_list);

	rt->dst.flags |= DST_NOCACHE;
	rt->rt6i_uncached_list = ul;

	spin_lock_bh(&ul->lock);
	list_add_tail(&rt->rt6i_uncached, &ul->head);
	spin_unlock_bh(&ul->lock);
}

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martin kafai lau martin kafai lau 65 100.00% 1 100.00%
Total 65 100.00% 1 100.00%



static void rt6_uncached_list_del(struct rt6_info *rt)
{
	if (!list_empty(&rt->rt6i_uncached)) {
		struct uncached_list *ul = rt->rt6i_uncached_list;

		spin_lock_bh(&ul->lock);
		list_del(&rt->rt6i_uncached);
		spin_unlock_bh(&ul->lock);
	}
}

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martin kafai lau martin kafai lau 57 100.00% 1 100.00%
Total 57 100.00% 1 100.00%



static void rt6_uncached_list_flush_dev(struct net *net, struct net_device *dev)
{
	struct net_device *loopback_dev = net->loopback_dev;
	int cpu;

	if (dev == loopback_dev)
		return;

	for_each_possible_cpu(cpu) {
		struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu);
		struct rt6_info *rt;

		spin_lock_bh(&ul->lock);
		list_for_each_entry(rt, &ul->head, rt6i_uncached) {
			struct inet6_dev *rt_idev = rt->rt6i_idev;
			struct net_device *rt_dev = rt->dst.dev;

			if (rt_idev->dev == dev) {
				rt->rt6i_idev = in6_dev_get(loopback_dev);
				in6_dev_put(rt_idev);
			}

			if (rt_dev == dev) {
				rt->dst.dev = loopback_dev;
				dev_hold(rt->dst.dev);
				dev_put(rt_dev);
			}
		}
		spin_unlock_bh(&ul->lock);
	}
}

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martin kafai lau martin kafai lau 152 95.60% 1 50.00%
eric w. biederman eric w. biederman 7 4.40% 1 50.00%
Total 159 100.00% 2 100.00%



static u32 *rt6_pcpu_cow_metrics(struct rt6_info *rt)
{
	return dst_metrics_write_ptr(rt->dst.from);
}

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martin kafai lau martin kafai lau 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%



static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
{
	struct rt6_info *rt = (struct rt6_info *)dst;

	if (rt->rt6i_flags & RTF_PCPU)
		return rt6_pcpu_cow_metrics(rt);
	else if (rt->rt6i_flags & RTF_CACHE)
		return NULL;
	else
		return dst_cow_metrics_generic(dst, old);
}

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david s. miller david s. miller 30 47.62% 1 20.00%
martin kafai lau martin kafai lau 27 42.86% 3 60.00%
zheng yan zheng yan 6 9.52% 1 20.00%
Total 63 100.00% 5 100.00%



static inline const void *choose_neigh_daddr(struct rt6_info *rt,
					     struct sk_buff *skb,
					     const void *daddr)
{
	struct in6_addr *p = &rt->rt6i_gateway;

	if (!ipv6_addr_any(p))
		return (const void *) p;
	else if (skb)
		return &ipv6_hdr(skb)->daddr;
	return daddr;
}

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david s. miller david s. miller 67 100.00% 3 100.00%
Total 67 100.00% 3 100.00%



static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst,
					  struct sk_buff *skb,
					  const void *daddr)
{
	struct rt6_info *rt = (struct rt6_info *) dst;
	struct neighbour *n;

	daddr = choose_neigh_daddr(rt, skb, daddr);
	n = __ipv6_neigh_lookup(dst->dev, daddr);
	if (n)
		return n;
	return neigh_create(&nd_tbl, daddr, dst->dev);
}

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david s. miller david s. miller 83 100.00% 4 100.00%
Total 83 100.00% 4 100.00%


static struct dst_ops ip6_dst_ops_template = {
	.family			=	AF_INET6,
	.gc			=	ip6_dst_gc,
	.gc_thresh		=	1024,
	.check			=	ip6_dst_check,
	.default_advmss		=	ip6_default_advmss,
	.mtu			=	ip6_mtu,
	.cow_metrics		=	ipv6_cow_metrics,
	.destroy		=	ip6_dst_destroy,
	.ifdown			=	ip6_dst_ifdown,
	.negative_advice	=	ip6_negative_advice,
	.link_failure		=	ip6_link_failure,
	.update_pmtu		=	ip6_rt_update_pmtu,
	.redirect		=	rt6_do_redirect,
	.local_out		=	__ip6_local_out,
	.neigh_lookup		=	ip6_neigh_lookup,
};



static unsigned int ip6_blackhole_mtu(const struct dst_entry *dst)
{
	unsigned int mtu = dst_metric_raw(dst, RTAX_MTU);

	return mtu ? : dst->dev->mtu;
}

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steffen klassert steffen klassert 20 58.82% 3 75.00%
roland dreier roland dreier 14 41.18% 1 25.00%
Total 34 100.00% 4 100.00%



static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, struct sock *sk,
					 struct sk_buff *skb, u32 mtu)
{
}

Contributors
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david s. miller david s. miller 23 100.00% 2 100.00%
Total 23 100.00% 2 100.00%



static void ip6_rt_blackhole_redirect(struct dst_entry *dst, struct sock *sk,
				      struct sk_buff *skb)
{
}

Contributors
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david s. miller david s. miller 20 100.00% 2 100.00%
Total 20 100.00% 2 100.00%


static struct dst_ops ip6_dst_blackhole_ops = {
	.family			=	AF_INET6,
	.destroy		=	ip6_dst_destroy,
	.check			=	ip6_dst_check,
	.mtu			=	ip6_blackhole_mtu,
	.default_advmss		=	ip6_default_advmss,
	.update_pmtu		=	ip6_rt_blackhole_update_pmtu,
	.redirect		=	ip6_rt_blackhole_redirect,
	.cow_metrics		=	dst_cow_metrics_generic,
	.neigh_lookup		=	ip6_neigh_lookup,
};


static const u32 ip6_template_metrics[RTAX_MAX] = {
	[RTAX_HOPLIMIT - 1] = 0,
};


static const struct rt6_info ip6_null_entry_template = {
	.dst = {
		.__refcnt	= ATOMIC_INIT(1),
		.__use		= 1,
		.obsolete	= DST_OBSOLETE_FORCE_CHK,
		.error		= -ENETUNREACH,
		.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 const struct rt6_info ip6_prohibit_entry_template = {
	.dst = {
		.__refcnt	= ATOMIC_INIT(1),
		.__use		= 1,
		.obsolete	= DST_OBSOLETE_FORCE_CHK,
		.error		= -EACCES,
		.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 const struct rt6_info ip6_blk_hole_entry_template = {
	.dst = {
		.__refcnt	= ATOMIC_INIT(1),
		.__use		= 1,
		.obsolete	= DST_OBSOLETE_FORCE_CHK,
		.error		= -EINVAL,
		.input		= dst_discard,
		.output		= dst_discard_out,
        },
	.rt6i_flags	= (RTF_REJECT | RTF_NONEXTHOP),
	.rt6i_protocol  = RTPROT_KERNEL,
	.rt6i_metric	= ~(u32) 0,
	.rt6i_ref	= ATOMIC_INIT(1),
};

#endif



static void rt6_info_init(struct rt6_info *rt)
{
	struct dst_entry *dst = &rt->dst;

	memset(dst + 1, 0, sizeof(*rt) - sizeof(*dst));
	INIT_LIST_HEAD(&rt->rt6i_siblings);
	INIT_LIST_HEAD(&rt->rt6i_uncached);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 21 36.21% 2 22.22%
steffen klassert steffen klassert 14 24.14% 1 11.11%
martin kafai lau martin kafai lau 11 18.97% 2 22.22%
nicolas dichtel nicolas dichtel 8 13.79% 1 11.11%
benjamin thery benjamin thery 2 3.45% 1 11.11%
hideaki yoshifuji hideaki yoshifuji 2 3.45% 2 22.22%
Total 58 100.00% 9 100.00%

/* allocate dst with ip6_dst_ops */


static struct rt6_info *__ip6_dst_alloc(struct net *net,
					struct net_device *dev,
					int flags)
{
	struct rt6_info *rt = dst_alloc(&net->ipv6.ip6_dst_ops, dev,
					0, DST_OBSOLETE_FORCE_CHK, flags);

	if (rt)
		rt6_info_init(rt);

	return rt;
}

Contributors
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martin kafai lau martin kafai lau 52 92.86% 1 33.33%
kazunori miyazawa kazunori miyazawa 2 3.57% 1 33.33%
david s. miller david s. miller 2 3.57% 1 33.33%
Total 56 100.00% 3 100.00%



struct rt6_info *ip6_dst_alloc(struct net *net,
			       struct net_device *dev,
			       int flags)
{
	struct rt6_info *rt = __ip6_dst_alloc(net, dev, flags);

	if (rt) {
		rt->rt6i_pcpu = alloc_percpu_gfp(struct rt6_info *, GFP_ATOMIC);
		if (rt->rt6i_pcpu) {
			int cpu;

			for_each_possible_cpu(cpu) {
				struct rt6_info **p;

				p = per_cpu_ptr(rt->rt6i_pcpu, cpu);
				/* no one shares rt */
				*p =  NULL;
			}
		} else {
			dst_destroy((struct dst_entry *)rt);
			return NULL;
		}
	}

	return rt;
}
Contributors
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martin kafai lau martin kafai lau 112 100.00% 1 100.00%
Total 112 100.00% 1 100.00%


EXPORT_SYMBOL(ip6_dst_alloc);



static void ip6_dst_destroy(struct dst_entry *dst)
{
	struct rt6_info *rt = (struct rt6_info *)dst;
	struct dst_entry *from = dst->from;
	struct inet6_dev *idev;

	dst_destroy_metrics_generic(dst);
	free_percpu(rt->rt6i_pcpu);
	rt6_uncached_list_del(rt);

	idev = rt->rt6i_idev;
	if (idev) {
		rt->rt6i_idev = NULL;
		in6_dev_put(idev);
	}

	dst->from = NULL;
	dst_release(from);
}

Contributors
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hideaki yoshifuji hideaki yoshifuji 49 55.68% 3 37.50%
martin kafai lau martin kafai lau 23 26.14% 2 25.00%
gao feng gao feng 8 9.09% 1 12.50%
zheng yan zheng yan 7 7.95% 1 12.50%
david s. miller david s. miller 1 1.14% 1 12.50%
Total 88 100.00% 8 100.00%



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) {
		if (idev && idev->dev == dev) {
			struct inet6_dev *loopback_idev =
				in6_dev_get(loopback_dev);
			if (loopback_idev) {
				rt->rt6i_idev = loopback_idev;
				in6_dev_put(idev);
			}
		}
	}
}

Contributors
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hideaki yoshifuji hideaki yoshifuji 75 75.76% 4 57.14%
herbert xu herbert xu 10 10.10% 1 14.29%
denis v. lunev denis v. lunev 9 9.09% 1 14.29%
david s. miller david s. miller 5 5.05% 1 14.29%
Total 99 100.00% 7 100.00%



static bool __rt6_check_expired(const struct rt6_info *rt)
{
	if (rt->rt6i_flags & RTF_EXPIRES)
		return time_after(jiffies, rt->dst.expires);
	else
		return false;
}

Contributors
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martin kafai lau martin kafai lau 36 100.00% 1 100.00%
Total 36 100.00% 1 100.00%



static bool rt6_check_expired(const struct rt6_info *rt)
{
	if (rt->rt6i_flags & RTF_EXPIRES) {
		if (time_after(jiffies, rt->dst.expires))
			return true;
	} else if (rt->dst.from) {
		return rt6_check_expired((struct rt6_info *) rt->dst.from);
	}
	return false;
}

Contributors
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gao feng gao feng 44 65.67% 1 25.00%
hideaki yoshifuji hideaki yoshifuji 17 25.37% 1 25.00%
eric dumazet eric dumazet 3 4.48% 1 25.00%
li rongqing li rongqing 3 4.48% 1 25.00%
Total 67 100.00% 4 100.00%

/* Multipath route selection:
 *   Hash based function using packet header and flowlabel.
 * Adapted from fib_info_hashfn()
 */


static int rt6_info_hash_nhsfn(unsigned int candidate_count,
			       const struct flowi6 *fl6)
{
	return get_hash_from_flowi6(fl6) % candidate_count;
}

Contributors
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nicolas dichtel nicolas dichtel 20 83.33% 1 33.33%
tom herbert tom herbert 2 8.33% 1 33.33%
hideaki yoshifuji hideaki yoshifuji 2 8.33% 1 33.33%
Total 24 100.00% 3 100.00%



static struct rt6_info *rt6_multipath_select(struct rt6_info *match,
					     struct flowi6 *fl6, int oif,
					     int strict)
{
	struct rt6_info *sibling, *next_sibling;
	int route_choosen;

	route_choosen = rt6_info_hash_nhsfn(match->rt6i_nsiblings + 1, fl6);
	/* Don't change the route, if route_choosen == 0
         * (siblings does not include ourself)
         */
	if (route_choosen)
		list_for_each_entry_safe(sibling, next_sibling,
				&match->rt6i_siblings, rt6i_siblings) {
			route_choosen--;
			if (route_choosen == 0) {
				if (rt6_score_route(sibling, oif, strict) < 0)
					break;
				match = sibling;
				break;
			}
		}
	return match;
}

Contributors
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nicolas dichtel nicolas dichtel 98 100.00% 2 100.00%
Total 98 100.00% 2 100.00%

/*
 *      Route lookup. Any table->tb6_lock is implied.
 */



static inline struct rt6_info *rt6_device_match(struct net *net,
						    struct rt6_info *rt,
						    const 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->dst.dev;

		if (oif) {
			if (dev->ifindex == oif)
				return sprt;
			if (dev->flags & IFF_LOOPBACK) {
				if (!sprt->rt6i_idev ||
				    sprt->rt6i_idev->dev->ifindex != oif) {
					if (flags & RT6_LOOKUP_F_IFACE)
						continue;
					if (local &&
					    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;
}

Contributors
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hideaki yoshifuji hideaki yoshifuji 93 44.50% 4 33.33%
pre-git pre-git 71 33.97% 3 25.00%
daniel lezcano daniel lezcano 37 17.70% 1 8.33%
eric dumazet eric dumazet 4 1.91% 2 16.67%
david s. miller david s. miller 4 1.91% 2 16.67%
Total 209 100.00% 12 100.00%

#ifdef CONFIG_IPV6_ROUTER_PREF

struct __rt6_probe_work {
	
struct work_struct work;
	
struct in6_addr target;
	
struct net_device *dev;
};



static void rt6_probe_deferred(struct work_struct *w)
{
	struct in6_addr mcaddr;
	struct __rt6_probe_work *work =
		container_of(w, struct __rt6_probe_work, work);

	addrconf_addr_solict_mult(&work->target, &mcaddr);
	ndisc_send_ns(work->dev, &work->target, &mcaddr, NULL);
	dev_put(work->dev);
	kfree(work);
}

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hannes frederic sowa hannes frederic sowa 69 98.57% 1 50.00%
michael busch michael busch 1 1.43% 1 50.00%
Total 70 100.00% 2 100.00%



static void rt6_probe(struct rt6_info *rt)
{
	struct __rt6_probe_work *work;
	struct neighbour *neigh;
	/*
         * 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 (!rt || !(rt->rt6i_flags & RTF_GATEWAY))
		return;
	rcu_read_lock_bh();
	neigh = __ipv6_neigh_lookup_noref(rt->dst.dev, &rt->rt6i_gateway);
	if (neigh) {
		if (neigh->nud_state & NUD_VALID)
			goto out;

		work = NULL;
		write_lock(&neigh->lock);
		if (!(neigh->nud_state & NUD_VALID) &&
		    time_after(jiffies,
			       neigh->updated +
			       rt->rt6i_idev->cnf.rtr_probe_interval)) {
			work = kmalloc(sizeof(*work), GFP_ATOMIC);
			if (work)
				__neigh_set_probe_once(neigh);
		}
		write_unlock(&neigh->lock);
	} else {
		work = kmalloc(sizeof(*work), GFP_ATOMIC);
	}

	if (work) {
		INIT_WORK(&work->work, rt6_probe_deferred);
		work->target = rt->rt6i_gateway;
		dev_hold(rt->dst.dev);
		work->dev = rt->dst.dev;
		schedule_work(&work->work);
	}

out:
	rcu_read_unlock_bh();
}
Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 113 52.07% 5 41.67%
hannes frederic sowa hannes frederic sowa 47 21.66% 1 8.33%
martin kafai lau martin kafai lau 44 20.28% 2 16.67%
eric dumazet eric dumazet 6 2.76% 1 8.33%
jiri benc jiri benc 3 1.38% 1 8.33%
david s. miller david s. miller 3 1.38% 1 8.33%
daniel lezcano daniel lezcano 1 0.46% 1 8.33%
Total 217 100.00% 12 100.00%

#else


static inline void rt6_probe(struct rt6_info *rt)
{
}
Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 10 90.91% 1 50.00%
joe perches joe perches 1 9.09% 1 50.00%
Total 11 100.00% 2 100.00%

#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->dst.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;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 55 78.57% 4 57.14%
david s. miller david s. miller 14 20.00% 2 28.57%
dave jones dave jones 1 1.43% 1 14.29%
Total 70 100.00% 7 100.00%



static inline enum rt6_nud_state rt6_check_neigh(struct rt6_info *rt)
{
	struct neighbour *neigh;
	enum rt6_nud_state ret = RT6_NUD_FAIL_HARD;

	if (rt->rt6i_flags & RTF_NONEXTHOP ||
	    !(rt->rt6i_flags & RTF_GATEWAY))
		return RT6_NUD_SUCCEED;

	rcu_read_lock_bh();
	neigh = __ipv6_neigh_lookup_noref(rt->dst.dev, &rt->rt6i_gateway);
	if (neigh) {
		read_lock(&neigh->lock);
		if (neigh->nud_state & NUD_VALID)
			ret = RT6_NUD_SUCCEED;
#ifdef CONFIG_IPV6_ROUTER_PREF
		else if (!(neigh->nud_state & NUD_FAILED))
			ret = RT6_NUD_SUCCEED;
		else
			ret = RT6_NUD_FAIL_PROBE;
#endif
		read_unlock(&neigh->lock);
	} else {
		ret = IS_ENABLED(CONFIG_IPV6_ROUTER_PREF) ?
		      RT6_NUD_SUCCEED : RT6_NUD_FAIL_DO_RR;
	}
	rcu_read_unlock_bh();

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 85 59.44% 6 42.86%
pre-git pre-git 21 14.69% 3 21.43%
hannes frederic sowa hannes frederic sowa 21 14.69% 2 14.29%
paul marks paul marks 8 5.59% 1 7.14%
jiri benc jiri benc 6 4.20% 1 7.14%
eric dumazet eric dumazet 2 1.40% 1 7.14%
Total 143 100.00% 14 100.00%



static int rt6_score_route(struct rt6_info *rt, int oif,
			   int strict)
{
	int m;

	m = rt6_check_dev(rt, oif);
	if (!m && (strict & RT6_LOOKUP_F_IFACE))
		return RT6_NUD_FAIL_HARD;
#ifdef CONFIG_IPV6_ROUTER_PREF
	m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2;
#endif
	if (strict & RT6_LOOKUP_F_REACHABLE) {
		int n = rt6_check_neigh(rt);
		if (n < 0)
			return n;
	}
	return m;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 65 72.22% 5 62.50%
hannes frederic sowa hannes frederic sowa 17 18.89% 1 12.50%
pre-git pre-git 6 6.67% 1 12.50%
paul marks paul marks 2 2.22% 1 12.50%
Total 90 100.00% 8 100.00%



static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict,
				   int *mpri, struct rt6_info *match,
				   bool *do_rr)
{
	int m;
	bool match_do_rr = false;
	struct inet6_dev *idev = rt->rt6i_idev;
	struct net_device *dev = rt->dst.dev;

	if (dev && !netif_carrier_ok(dev) &&
	    idev->cnf.ignore_routes_with_linkdown)
		goto out;

	if (rt6_check_expired(rt))
		goto out;

	m = rt6_score_route(rt, oif, strict);
	if (m == RT6_NUD_FAIL_DO_RR) {
		match_do_rr = true;
		m = 0; /* lowest valid score */
	} else if (m == RT6_NUD_FAIL_HARD) {
		goto out;
	}

	if (strict & RT6_LOOKUP_F_REACHABLE)
		rt6_probe(rt);

	/* note that m can be RT6_NUD_FAIL_PROBE at this point */
	if (m > *mpri) {
		*do_rr = match_do_rr;
		*mpri = m;
		match = rt;
	}
out:
	return match;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 62 36.69% 6 54.55%
hannes frederic sowa hannes frederic sowa 40 23.67% 1 9.09%
andy gospodarek andy gospodarek 39 23.08% 1 9.09%
david s. miller david s. miller 21 12.43% 1 9.09%
jiri benc jiri benc 4 2.37% 1 9.09%
pre-git pre-git 3 1.78% 1 9.09%
Total 169 100.00% 11 100.00%



static struct rt6_info *find_rr_leaf(struct fib6_node *fn,
				     struct rt6_info *rr_head,
				     u32 metric, int oif, int strict,
				     bool *do_rr)
{
	struct rt6_info *rt, *match, *cont;
	int mpri = -1;

	match = NULL;
	cont = NULL;
	for (rt = rr_head; rt; rt = rt->dst.rt6_next) {
		if (rt->rt6i_metric != metric) {
			cont = rt;
			break;
		}

		match = find_match(rt, oif, strict, &mpri, match, do_rr);
	}

	for (rt = fn->leaf; rt && rt != rr_head; rt = rt->dst.rt6_next) {
		if (rt->rt6i_metric != metric) {
			cont = rt;
			break;
		}

		match = find_match(rt, oif, strict, &mpri, match, do_rr);
	}

	if (match || !cont)
		return match;

	for (rt = cont; rt; rt = rt->dst.rt6_next)
		match = find_match(rt, oif, strict, &mpri, match, do_rr);

	return match;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 106 50.24% 1 14.29%
steffen klassert steffen klassert 81 38.39% 1 14.29%
hideaki yoshifuji hideaki yoshifuji 10 4.74% 3 42.86%
hannes frederic sowa hannes frederic sowa 8 3.79% 1 14.29%
eric dumazet eric dumazet 6 2.84% 1 14.29%
Total 211 100.00% 7 100.00%



static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict)
{
	struct rt6_info *match, *rt0;
	struct net *net;
	bool do_rr = false;

	rt0 = fn->rr_ptr;
	if (!rt0)
		fn->rr_ptr = rt0 = fn->leaf;

	match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict,
			     &do_rr);

	if (do_rr) {
		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;
	}

	net = dev_net(rt0->dst.dev);
	return match ? match : net->ipv6.ip6_null_entry;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 107 71.81% 2 20.00%
daniel lezcano daniel lezcano 14 9.40% 1 10.00%
hideaki yoshifuji hideaki yoshifuji 13 8.72% 4 40.00%
hannes frederic sowa hannes frederic sowa 9 6.04% 1 10.00%
eric dumazet eric dumazet 3 2.01% 1 10.00%
pre-git pre-git 3 2.01% 1 10.00%
Total 149 100.00% 10 100.00%



static bool rt6_is_gw_or_nonexthop(const struct rt6_info *rt)
{
	return (rt->rt6i_flags & (RTF_NONEXTHOP | RTF_GATEWAY));
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%

#ifdef CONFIG_IPV6_ROUTE_INFO


int rt6_route_rcv(struct net_device *dev, u8 *opt, int len,
		  const 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;
	}

	if (rinfo->prefix_len == 0)
		rt = rt6_get_dflt_router(gwaddr, dev);
	else
		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))
			rt6_clean_expires(rt);
		else
			rt6_set_expires(rt, jiffies + HZ * lifetime);

		ip6_rt_put(rt);
	}
	return 0;
}
Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 307 79.74% 3 20.00%
pre-git pre-git 35 9.09% 5 33.33%
duan jiong duan jiong 18 4.68% 1 6.67%
daniel lezcano daniel lezcano 11 2.86% 1 6.67%
gao feng gao feng 7 1.82% 1 6.67%
jens rosenboom jens rosenboom 4 1.04% 1 6.67%
eric dumazet eric dumazet 1 0.26% 1 6.67%
al viro al viro 1 0.26% 1 6.67%
americo wang americo wang 1 0.26% 1 6.67%
Total 385 100.00% 15 100.00%

#endif



static struct fib6_node* fib6_backtrack(struct fib6_node *fn,
					struct in6_addr *saddr)
{
	struct fib6_node *pn;
	while (1) {
		if (fn->fn_flags & RTN_TL_ROOT)
			return NULL;
		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)
			return fn;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 86 95.56% 1 33.33%
hideaki yoshifuji hideaki yoshifuji 3 3.33% 1 33.33%
daniel lezcano daniel lezcano 1 1.11% 1 33.33%
Total 90 100.00% 3 100.00%



static struct rt6_info *ip6_pol_route_lookup(struct net *net,
					     struct fib6_table *table,
					     struct flowi6 *fl6, int flags)
{
	struct fib6_node *fn;
	struct rt6_info *rt;

	read_lock_bh(&table->tb6_lock);
	fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr);
restart:
	rt = fn->leaf;
	rt = rt6_device_match(net, rt, &fl6->saddr, fl6->flowi6_oif, flags);
	if (rt->rt6i_nsiblings && fl6->flowi6_oif == 0)
		rt = rt6_multipath_select(rt, fl6, fl6->flowi6_oif, flags);
	if (rt == net->ipv6.ip6_null_entry) {
		fn = fib6_backtrack(fn, &fl6->saddr);
		if (fn)
			goto restart;
	}
	dst_use(&rt->dst, jiffies);
	read_unlock_bh(&table->tb6_lock);

	trace_fib6_table_lookup(net, rt, table->tb6_id, fl6);

	return rt;

}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 56 30.43% 3 21.43%
thomas graf thomas graf 33 17.93% 1 7.14%
nicolas dichtel nicolas dichtel 27 14.67% 2 14.29%
martin kafai lau martin kafai lau 23 12.50% 1 7.14%
david ahern david ahern 13 7.07% 1 7.14%
david s. miller david s. miller 12 6.52% 1 7.14%
daniel lezcano daniel lezcano 9 4.89% 1 7.14%
pre-git pre-git 8 4.35% 3 21.43%
pavel emelianov pavel emelianov 3 1.63% 1 7.14%
Total 184 100.00% 14 100.00%



struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6,
				    int flags)
{
	return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_lookup);
}
Contributors
Person Tokens Prop Commits CommitProp
florian westphal florian westphal 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(ip6_route_lookup);



struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
			    const struct in6_addr *saddr, int oif, int strict)
{
	struct flowi6 fl6 = {
		.flowi6_oif = oif,
		.daddr = *daddr,
        };
	struct dst_entry *dst;
	int flags = strict ? RT6_LOOKUP_F_IFACE : 0;

	if (saddr) {
		memcpy(&fl6.saddr, saddr, sizeof(*saddr));
		flags |= RT6_LOOKUP_F_HAS_SADDR;
	}

	dst = fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_lookup);
	if (dst->error == 0)
		return (struct rt6_info *) dst;

	dst_release(dst);

	return NULL;
}
Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 92 73.60% 2 22.22%
pre-git pre-git 15 12.00% 2 22.22%
daniel lezcano daniel lezcano 8 6.40% 2 22.22%
david s. miller david s. miller 7 5.60% 1 11.11%
hideaki yoshifuji hideaki yoshifuji 3 2.40% 2 22.22%
Total 125 100.00% 9 100.00%


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,
			struct mx6_config *mxc)
{
	int err;
	struct fib6_table *table;

	table = rt->rt6i_table;
	write_lock_bh(&table->tb6_lock);
	err = fib6_add(&table->tb6_root, rt, info, mxc);
	write_unlock_bh(&table->tb6_lock);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 34 48.57% 3 30.00%
thomas graf thomas graf 25 35.71% 3 30.00%
michal kubecek michal kubecek 4 5.71% 1 10.00%
florian westphal florian westphal 3 4.29% 1 10.00%
mathew richardson mathew richardson 3 4.29% 1 10.00%
jamal hadi salim jamal hadi salim 1 1.43% 1 10.00%
Total 70 100.00% 10 100.00%



int ip6_ins_rt(struct rt6_info *rt)
{
	struct nl_info info = {	.nl_net = dev_net(rt->dst.dev), };
	struct mx6_config mxc = { .mx = NULL, };

	return __ip6_ins_rt(rt, &info, &mxc);
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 17 33.33% 1 12.50%
florian westphal florian westphal 14 27.45% 1 12.50%
denis v. lunev denis v. lunev 11 21.57% 2 25.00%
david s. miller david s. miller 3 5.88% 1 12.50%
hideaki yoshifuji hideaki yoshifuji 3 5.88% 1 12.50%
daniel lezcano daniel lezcano 2 3.92% 1 12.50%
michal kubecek michal kubecek 1 1.96% 1 12.50%
Total 51 100.00% 8 100.00%



static struct rt6_info *ip6_rt_cache_alloc(struct rt6_info *ort,
					   const struct in6_addr *daddr,
					   const struct in6_addr *saddr)
{
	struct rt6_info *rt;

	/*
         *      Clone the route.
         */

	if (ort->rt6i_flags & (RTF_CACHE | RTF_PCPU))
		ort = (struct rt6_info *)ort->dst.from;

	rt = __ip6_dst_alloc(dev_net(ort->dst.dev), ort->dst.dev, 0);

	if (!rt)
		return NULL;

	ip6_rt_copy_init(rt, ort);
	rt->rt6i_flags |= RTF_CACHE;
	rt->rt6i_metric = 0;
	rt->dst.flags |= DST_HOST;
	rt->rt6i_dst.addr = *daddr;
	rt->rt6i_dst.plen = 128;

	if (!rt6_is_gw_or_nonexthop(ort)) {
		if (ort->rt6i_dst.plen != 128 &&
		    ipv6_addr_equal(&ort->rt6i_dst.addr, daddr))
			rt->rt6i_flags |= RTF_ANYCAST;
#ifdef CONFIG_IPV6_SUBTREES
		if (rt->rt6i_src.plen && saddr) {
			rt->rt6i_src.addr = *saddr;
			rt->rt6i_src.plen = 128;
		}
#endif
	}

	return rt;
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 98 47.80% 3 20.00%
pre-git pre-git 81 39.51% 5 33.33%
hideaki yoshifuji hideaki yoshifuji 19 9.27% 3 20.00%
eric dumazet eric dumazet 4 1.95% 2 13.33%
alexey dobriyan alexey dobriyan 2 0.98% 1 6.67%
david s. miller david s. miller 1 0.49% 1 6.67%
Total 205 100.00% 15 100.00%



static struct rt6_info *ip6_rt_pcpu_alloc(struct rt6_info *rt)
{
	struct rt6_info *pcpu_rt;

	pcpu_rt = __ip6_dst_alloc(dev_net(rt->dst.dev),
				  rt->dst.dev, rt->dst.flags);

	if (!pcpu_rt)
		return NULL;
	ip6_rt_copy_init(pcpu_rt, rt);
	pcpu_rt->rt6i_protocol = rt->rt6i_protocol;
	pcpu_rt->rt6i_flags |= RTF_PCPU;
	return pcpu_rt;
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%

/* It should be called with read_lock_bh(&tb6_lock) acquired */


static struct rt6_info *rt6_get_pcpu_route(struct rt6_info *rt)
{
	struct rt6_info *pcpu_rt, **p;

	p = this_cpu_ptr(rt->rt6i_pcpu);
	pcpu_rt = *p;

	if (pcpu_rt) {
		dst_hold(&pcpu_rt->dst);
		rt6_dst_from_metrics_check(pcpu_rt);
	}
	return pcpu_rt;
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 58 100.00% 2 100.00%
Total 58 100.00% 2 100.00%



static struct rt6_info *rt6_make_pcpu_route(struct rt6_info *rt)
{
	struct fib6_table *table = rt->rt6i_table;
	struct rt6_info *pcpu_rt, *prev, **p;

	pcpu_rt = ip6_rt_pcpu_alloc(rt);
	if (!pcpu_rt) {
		struct net *net = dev_net(rt->dst.dev);

		dst_hold(&net->ipv6.ip6_null_entry->dst);
		return net->ipv6.ip6_null_entry;
	}

	read_lock_bh(&table->tb6_lock);
	if (rt->rt6i_pcpu) {
		p = this_cpu_ptr(rt->rt6i_pcpu);
		prev = cmpxchg(p, NULL, pcpu_rt);
		if (prev) {
			/* If someone did it before us, return prev instead */
			dst_destroy(&pcpu_rt->dst);
			pcpu_rt = prev;
		}
	} else {
		/* rt has been removed from the fib6 tree
                 * before we have a chance to acquire the read_lock.
                 * In this case, don't brother to create a pcpu rt
                 * since rt is going away anyway.  The next
                 * dst_check() will trigger a re-lookup.
                 */
		dst_destroy(&pcpu_rt->dst);
		pcpu_rt = rt;
	}
	dst_hold(&pcpu_rt->dst);
	rt6_dst_from_metrics_check(pcpu_rt);
	read_unlock_bh(&table->tb6_lock);
	return pcpu_rt;
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 176 100.00% 3 100.00%
Total 176 100.00% 3 100.00%



struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table,
			       int oif, struct flowi6 *fl6, int flags)
{
	struct fib6_node *fn, *saved_fn;
	struct rt6_info *rt;
	int strict = 0;

	strict |= flags & RT6_LOOKUP_F_IFACE;
	if (net->ipv6.devconf_all->forwarding == 0)
		strict |= RT6_LOOKUP_F_REACHABLE;

	read_lock_bh(&table->tb6_lock);

	fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr);
	saved_fn = fn;

	if (fl6->flowi6_flags & FLOWI_FLAG_SKIP_NH_OIF)
		oif = 0;

redo_rt6_select:
	rt = rt6_select(fn, oif, strict);
	if (rt->rt6i_nsiblings)
		rt = rt6_multipath_select(rt, fl6, oif, strict);
	if (rt == net->ipv6.ip6_null_entry) {
		fn = fib6_backtrack(fn, &fl6->saddr);
		if (fn)
			goto redo_rt6_select;
		else if (strict & RT6_LOOKUP_F_REACHABLE) {
			/* also consider unreachable route */
			strict &= ~RT6_LOOKUP_F_REACHABLE;
			fn = saved_fn;
			goto redo_rt6_select;
		}
	}


	if (rt == net->ipv6.ip6_null_entry || (rt->rt6i_flags & RTF_CACHE)) {
		dst_use(&rt->dst, jiffies);
		read_unlock_bh(&table->tb6_lock);

		rt6_dst_from_metrics_check(rt);

		trace_fib6_table_lookup(net, rt, table->tb6_id, fl6);
		return rt;
	} else if (unlikely((fl6->flowi6_flags & FLOWI_FLAG_KNOWN_NH) &&
			    !(rt->rt6i_flags & RTF_GATEWAY))) {
		/* Create a RTF_CACHE clone which will not be
                 * owned by the fib6 tree.  It is for the special case where
                 * the daddr in the skb during the neighbor look-up is different
                 * from the fl6->daddr used to look-up route here.
                 */

		struct rt6_info *uncached_rt;

		dst_use(&rt->dst, jiffies);
		read_unlock_bh(&table->tb6_lock);

		uncached_rt = ip6_rt_cache_alloc(rt, &fl6->daddr, NULL);
		dst_release(&rt->dst);

		if (uncached_rt)
			rt6_uncached_list_add(uncached_rt);
		else
			uncached_rt = net->ipv6.ip6_null_entry;

		dst_hold(&uncached_rt->dst);

		trace_fib6_table_lookup(net, uncached_rt, table->tb6_id, fl6);
		return uncached_rt;

	} else {
		/* Get a percpu copy */

		struct rt6_info *pcpu_rt;

		rt->dst.lastuse = jiffies;
		rt->dst.__use++;
		pcpu_rt = rt6_get_pcpu_route(rt);

		if (pcpu_rt) {
			read_unlock_bh(&table->tb6_lock);
		} else {
			/* We have to do the read_unlock first
                         * because rt6_make_pcpu_route() may trigger
                         * ip6_dst_gc() which will take the write_lock.
                         */
			dst_hold(&rt->dst);
			read_unlock_bh(&table->tb6_lock);
			pcpu_rt = rt6_make_pcpu_route(rt);
			dst_release(&rt->dst);
		}

		trace_fib6_table_lookup(net, pcpu_rt, table->tb6_id, fl6);
		return pcpu_rt;

	}
}
Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 266 57.20% 8 28.57%
david ahern david ahern 51 10.97% 2 7.14%
pre-git pre-git 38 8.17% 4 14.29%
hideaki yoshifuji hideaki yoshifuji 35 7.53% 7 25.00%
thomas graf thomas graf 25 5.38% 1 3.57%
david s. miller david s. miller 19 4.09% 2 7.14%
nicolas dichtel nicolas dichtel 19 4.09% 2 7.14%
daniel lezcano daniel lezcano 7 1.51% 1 3.57%
pavel emelianov pavel emelianov 5 1.08% 1 3.57%
Total 465 100.00% 28 100.00%


EXPORT_SYMBOL_GPL(ip6_pol_route);



static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *table,
					    struct flowi6 *fl6, int flags)
{
	return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
pavel emelianov pavel emelianov 30 71.43% 1 33.33%
daniel lezcano daniel lezcano 7 16.67% 1 33.33%
david s. miller david s. miller 5 11.90% 1 33.33%
Total 42 100.00% 3 100.00%



static struct dst_entry *ip6_route_input_lookup(struct net *net,
						struct net_device *dev,
						struct flowi6 *fl6, int flags)
{
	if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG)
		flags |= RT6_LOOKUP_F_IFACE;

	return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input);
}

Contributors
Person Tokens Prop Commits CommitProp
shmulik ladkani shmulik ladkani 58 100.00% 1 100.00%
Total 58 100.00% 1 100.00%



void ip6_route_input(struct sk_buff *skb)
{
	const struct ipv6hdr *iph = ipv6_hdr(skb);
	struct net *net = dev_net(skb->dev);
	int flags = RT6_LOOKUP_F_HAS_SADDR;
	struct ip_tunnel_info *tun_info;
	struct flowi6 fl6 = {
		.flowi6_iif = l3mdev_fib_oif(skb->dev),
		.daddr = iph->daddr,
		.saddr = iph->saddr,
		.flowlabel = ip6_flowinfo(iph),
		.flowi6_mark = skb->mark,
		.flowi6_proto = iph->nexthdr,
        };

	tun_info = skb_tunnel_info(skb);
	if (tun_info && !(tun_info->mode & IP_TUNNEL_INFO_TX))
		fl6.flowi6_tun_key.tun_id = tun_info->key.tun_id;
	skb_dst_drop(skb);
	skb_dst_set(skb, ip6_route_input_lookup(net, skb->dev, &fl6, flags));
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 61 40.40% 3 15.79%
jiri benc jiri benc 42 27.81% 3 15.79%
daniel lezcano daniel lezcano 12 7.95% 2 10.53%
david s. miller david s. miller 9 5.96% 1 5.26%
hideaki yoshifuji hideaki yoshifuji 7 4.64% 3 15.79%
eric dumazet eric dumazet 5 3.31% 2 10.53%
shmulik ladkani shmulik ladkani 5 3.31% 1 5.26%
pre-git pre-git 4 2.65% 2 10.53%
david ahern david ahern 3 1.99% 1 5.26%
arnaldo carvalho de melo arnaldo carvalho de melo 3 1.99% 1 5.26%
Total 151 100.00% 19 100.00%



static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table,
					     struct flowi6 *fl6, int flags)
{
	return ip6_pol_route(net, table, fl6->flowi6_oif, fl6, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 12 28.57% 2 25.00%
thomas graf thomas graf 11 26.19% 1 12.50%
daniel lezcano daniel lezcano 7 16.67% 1 12.50%
david s. miller david s. miller 5 11.90% 1 12.50%
hideaki yoshifuji hideaki yoshifuji 4 9.52% 2 25.00%
pavel emelianov pavel emelianov 3 7.14% 1 12.50%
Total 42 100.00% 8 100.00%



struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk,
					 struct flowi6 *fl6, int flags)
{
	struct dst_entry *dst;
	bool any_src;

	dst = l3mdev_get_rt6_dst(net, fl6);
	if (dst)
		return dst;

	fl6->flowi6_iif = LOOPBACK_IFINDEX;

	any_src = ipv6_addr_any(&fl6->saddr);
	if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr) ||
	    (fl6->flowi6_oif && any_src))
		flags |= RT6_LOOKUP_F_IFACE;

	if (!any_src)
		flags |= RT6_LOOKUP_F_HAS_SADDR;
	else if (sk)
		flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs);

	return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_output);
}
Contributors
Person Tokens Prop Commits CommitProp
david ahern david ahern 43 32.09% 4 20.00%
thomas graf thomas graf 39 29.10% 2 10.00%
hideaki yoshifuji hideaki yoshifuji 18 13.43% 3 15.00%
daniel lezcano daniel lezcano 7 5.22% 2 10.00%
brian haley brian haley 6 4.48% 1 5.00%
david s. miller david s. miller 5 3.73% 1 5.00%
david mccullough david mccullough 5 3.73% 1 5.00%
paolo abeni paolo abeni 4 2.99% 1 5.00%
pre-git pre-git 3 2.24% 2 10.00%
jiri olsa jiri olsa 2 1.49% 1 5.00%
florian westphal florian westphal 1 0.75% 1 5.00%
pavel emelianov pavel emelianov 1 0.75% 1 5.00%
Total 134 100.00% 20 100.00%


EXPORT_SYMBOL_GPL(ip6_route_output_flags);



struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig)
{
	struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig;
	struct dst_entry *new = NULL;

	rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, DST_OBSOLETE_NONE, 0);
	if (rt) {
		rt6_info_init(rt);

		new = &rt->dst;
		new->__use = 1;
		new->input = dst_discard;
		new->output = dst_discard_out;

		dst_copy_metrics(new, &ort->dst);
		rt->rt6i_idev = ort->rt6i_idev;
		if (rt->rt6i_idev)
			in6_dev_hold(rt->rt6i_idev);

		rt->rt6i_gateway = ort->rt6i_gateway;
		rt->rt6i_flags = ort->rt6i_flags & ~RTF_PCPU;
		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(dst_orig);
	return new ? new : ERR_PTR(-ENOMEM);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 199 92.56% 7 53.85%
martin kafai lau martin kafai lau 8 3.72% 1 7.69%
steffen klassert steffen klassert 4 1.86% 1 7.69%
herbert xu herbert xu 1 0.47% 1 7.69%
eric w. biederman eric w. biederman 1 0.47% 1 7.69%
alexey dobriyan alexey dobriyan 1 0.47% 1 7.69%
gao feng gao feng 1 0.47% 1 7.69%
Total 215 100.00% 13 100.00%

/*
 *      Destination cache support functions
 */



static void rt6_dst_from_metrics_check(struct rt6_info *rt)
{
	if (rt->dst.from &&
	    dst_metrics_ptr(&rt->dst) != dst_metrics_ptr(rt->dst.from))
		dst_init_metrics(&rt->dst, dst_metrics_ptr(rt->dst.from), true);
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%



static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie)
{
	if (!rt->rt6i_node || (rt->rt6i_node->fn_sernum != cookie))
		return NULL;

	if (rt6_check_expired(rt))
		return NULL;

	return &rt->dst;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 29 55.77% 3 50.00%
hannes frederic sowa hannes frederic sowa 11 21.15% 1 16.67%
martin kafai lau martin kafai lau 10 19.23% 1 16.67%
nicolas dichtel nicolas dichtel 2 3.85% 1 16.67%
Total 52 100.00% 6 100.00%



static struct dst_entry *rt6_dst_from_check(struct rt6_info *rt, u32 cookie)
{
	if (!__rt6_check_expired(rt) &&
	    rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK &&
	    rt6_check((struct rt6_info *)(rt->dst.from), cookie))
		return &rt->dst;
	else
		return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 60 100.00% 2 100.00%
Total 60 100.00% 2 100.00%



static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie)
{
	struct rt6_info *rt;

	rt = (struct rt6_info *) dst;

	/* All IPV6 dsts are created with ->obsolete set to the value
         * DST_OBSOLETE_FORCE_CHK which forces validation calls down
         * into this function always.
         */

	rt6_dst_from_metrics_check(rt);

	if (rt->rt6i_flags & RTF_PCPU ||
	    (unlikely(dst->flags & DST_NOCACHE) && rt->dst.from))
		return rt6_dst_from_check(rt, cookie);
	else
		return rt6_check(rt, cookie);
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 75 96.15% 4 66.67%
hannes frederic sowa hannes frederic sowa 2 2.56% 1 16.67%
pre-git pre-git 1 1.28% 1 16.67%
Total 78 100.00% 6 100.00%



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;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 52 70.27% 3 75.00%
hideaki yoshifuji hideaki yoshifuji 22 29.73% 1 25.00%
Total 74 100.00% 4 100.00%



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_hold(&rt->dst);
			ip6_del_rt(rt);
		} else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) {
			rt->rt6i_node->fn_sernum = -1;
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 78 82.98% 2 50.00%
hannes frederic sowa hannes frederic sowa 13 13.83% 1 25.00%
eric dumazet eric dumazet 3 3.19% 1 25.00%
Total 94 100.00% 4 100.00%



static void rt6_do_update_pmtu(struct rt6_info *rt, u32 mtu)
{
	struct net *net = dev_net(rt->dst.dev);

	rt->rt6i_flags |= RTF_MODIFIED;
	rt->rt6i_pmtu = mtu;
	rt6_update_expires(rt, net->ipv6.sysctl.ip6_rt_mtu_expires);
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 51 96.23% 1 50.00%
alexey kuznetsov alexey kuznetsov 2 3.77% 1 50.00%
Total 53 100.00% 2 100.00%



static bool rt6_cache_allowed_for_pmtu(const struct rt6_info *rt)
{
	return !(rt->rt6i_flags & RTF_CACHE) &&
		(rt->rt6i_flags & RTF_PCPU || rt->rt6i_node);
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 34 100.00% 1 100.00%
Total 34 100.00% 1 100.00%



static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk,
				 const struct ipv6hdr *iph, u32 mtu)
{
	struct rt6_info *rt6 = (struct rt6_info *)dst;

	if (rt6->rt6i_flags & RTF_LOCAL)
		return;

	dst_confirm(dst);
	mtu = max_t(u32, mtu, IPV6_MIN_MTU);
	if (mtu >= dst_mtu(dst))
		return;

	if (!rt6_cache_allowed_for_pmtu(rt6)) {
		rt6_do_update_pmtu(rt6, mtu);
	} else {
		const struct in6_addr *daddr, *saddr;
		struct rt6_info *nrt6;

		if (iph) {
			daddr = &iph->daddr;
			saddr = &iph->saddr;
		} else if (sk) {
			daddr = &sk->sk_v6_daddr;
			saddr = &inet6_sk(sk)->saddr;
		} else {
			return;
		}
		nrt6 = ip6_rt_cache_alloc(rt6, daddr, saddr);
		if (nrt6) {
			rt6_do_update_pmtu(nrt6, mtu);

			/* ip6_ins_rt(nrt6) will bump the
                         * rt6->rt6i_node->fn_sernum
                         * which will fail the next rt6_check() and
                         * invalidate the sk->sk_dst_cache.
                         */
			ip6_ins_rt(nrt6);
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 123 66.49% 3 37.50%
alexey kuznetsov alexey kuznetsov 34 18.38% 1 12.50%
david s. miller david s. miller 23 12.43% 2 25.00%
shirley ma shirley ma 4 2.16% 1 12.50%
herbert xu herbert xu 1 0.54% 1 12.50%
Total 185 100.00% 8 100.00%



static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
			       struct sk_buff *skb, u32 mtu)
{
	__ip6_rt_update_pmtu(dst, sk, skb ? ipv6_hdr(skb) : NULL, mtu);
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%



void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
		     int oif, u32 mark)
{
	const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data;
	struct dst_entry *dst;
	struct flowi6 fl6;

	memset(&fl6, 0, sizeof(fl6));
	fl6.flowi6_oif = oif;
	fl6.flowi6_mark = mark ? mark : IP6_REPLY_MARK(net, skb->mark);
	fl6.daddr = iph->daddr;
	fl6.saddr = iph->saddr;
	fl6.flowlabel = ip6_flowinfo(iph);

	dst = ip6_route_output(net, NULL, &fl6);
	if (!dst->error)
		__ip6_rt_update_pmtu(dst, NULL, iph, ntohl(mtu));
	dst_release(dst);
}
Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 130 88.44% 3 42.86%
lorenzo colitti lorenzo colitti 11 7.48% 1 14.29%
hideaki yoshifuji hideaki yoshifuji 3 2.04% 1 14.29%
martin kafai lau martin kafai lau 2 1.36% 1 14.29%
alexey kuznetsov alexey kuznetsov 1 0.68% 1 14.29%
Total 147 100.00% 7 100.00%


EXPORT_SYMBOL_GPL(ip6_update_pmtu);



void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu)
{
	struct dst_entry *dst;

	ip6_update_pmtu(skb, sock_net(sk), mtu,
			sk->sk_bound_dev_if, sk->sk_mark);

	dst = __sk_dst_get(sk);
	if (!dst || !dst->obsolete ||
	    dst->ops->check(dst, inet6_sk(sk)->dst_cookie))
		return;

	bh_lock_sock(sk);
	if (!sock_owned_by_user(sk) && !ipv6_addr_v4mapped(&sk->sk_v6_daddr))
		ip6_datagram_dst_update(sk, false);
	bh_unlock_sock(sk);
}
Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 73 65.77% 1 33.33%
david s. miller david s. miller 37 33.33% 1 33.33%
alexey kuznetsov alexey kuznetsov 1 0.90% 1 33.33%
Total 111 100.00% 3 100.00%


EXPORT_SYMBOL_GPL(ip6_sk_update_pmtu);

/* Handle redirects */

struct ip6rd_flowi {
	
struct flowi6 fl6;
	
struct in6_addr gateway;
};



static struct rt6_info *__ip6_route_redirect(struct net *net,
					     struct fib6_table *table,
					     struct flowi6 *fl6,
					     int flags)
{
	struct ip6rd_flowi *rdfl = (struct ip6rd_flowi *)fl6;
	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 4861 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, &fl6->daddr, &fl6->saddr);
restart:
	for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
		if (rt6_check_expired(rt))
			continue;
		if (rt->dst.error)
			break;
		if (!(rt->rt6i_flags & RTF_GATEWAY))
			continue;
		if (fl6->flowi6_oif != rt->dst.dev->ifindex)
			continue;
		if (!ipv6_addr_equal(&rdfl->gateway, &rt->rt6i_gateway))
			continue;
		break;
	}

	if (!rt)
		rt = net->ipv6.ip6_null_entry;
	else if (rt->dst.error) {
		rt = net->ipv6.ip6_null_entry;
		goto out;
	}

	if (rt == net->ipv6.ip6_null_entry) {
		fn = fib6_backtrack(fn, &fl6->saddr);
		if (fn)
			goto restart;
	}

out:
	dst_hold(&rt->dst);

	read_unlock_bh(&table->tb6_lock);

	trace_fib6_table_lookup(net, rt, table->tb6_id, fl6);
	return rt;
}Contributors
Person Tokens Prop Commits CommitProp
duan jiong duan jiong 220 84.29% 1 25.00%
martin kafai lau martin kafai lau 28 10.73% 2 50.00%
david ahern david ahern 13 4.98% 1 25.00%
Total 261 100.00% 4 100.00%

;



static struct dst_entry *ip6_route_redirect(struct net *net,
					const struct flowi6 *fl6,
					const struct in6_addr *gateway)
{
	int flags = RT6_LOOKUP_F_HAS_SADDR;
	struct ip6rd_flowi rdfl;

	rdfl.fl6 = *fl6;
	rdfl.gateway = *gateway;

	return fib6_rule_lookup(net, &rdfl.fl6,
				flags, __ip6_route_redirect);
}

Contributors
Person Tokens Prop Commits CommitProp
duan jiong duan jiong 63 100.00% 1 100.00%
Total 63 100.00% 1 100.00%



void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark)
{
	const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data;
	struct dst_entry *dst;
	struct flowi6 fl6;

	memset(&fl6, 0, sizeof(fl6));
	fl6.flowi6_iif = LOOPBACK_IFINDEX;
	fl6.flowi6_oif = oif;
	fl6.flowi6_mark = mark;
	fl6.daddr = iph->daddr;
	fl6.saddr = iph->saddr;
	fl6.flowlabel = ip6_flowinfo(iph);

	dst = ip6_route_redirect(net, &fl6, &ipv6_hdr(skb)->saddr);
	rt6_do_redirect(dst, NULL, skb);
	dst_release(dst);
}
Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 115 86.47% 2 40.00%
duan jiong duan jiong 9 6.77% 1 20.00%
julian anastasov julian anastasov 6 4.51% 1 20.00%
hideaki yoshifuji hideaki yoshifuji 3 2.26% 1 20.00%
Total 133 100.00% 5 100.00%


EXPORT_SYMBOL_GPL(ip6_redirect);



void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
			    u32 mark)
{
	const struct ipv6hdr *iph = ipv6_hdr(skb);
	const struct rd_msg *msg = (struct rd_msg *)icmp6_hdr(skb);
	struct dst_entry *dst;
	struct flowi6 fl6;

	memset(&fl6, 0, sizeof(fl6));
	fl6.flowi6_iif = LOOPBACK_IFINDEX;
	fl6.flowi6_oif = oif;
	fl6.flowi6_mark = mark;
	fl6.daddr = msg->dest;
	fl6.saddr = iph->daddr;

	dst = ip6_route_redirect(net, &fl6, &iph->saddr);
	rt6_do_redirect(dst, NULL, skb);
	dst_release(dst);
}

Contributors
Person Tokens Prop Commits CommitProp
duan jiong duan jiong 127 95.49% 2 66.67%
julian anastasov julian anastasov 6 4.51% 1 33.33%
Total 133 100.00% 3 100.00%



void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk)
{
	ip6_redirect(skb, sock_net(sk), sk->sk_bound_dev_if, sk->sk_mark);
}
Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 33 100.00% 1 100.00%
Total 33 100.00% 1 100.00%


EXPORT_SYMBOL_GPL(ip6_sk_redirect);



static unsigned int ip6_default_advmss(const struct dst_entry *dst)
{
	struct net_device *dev = dst->dev;
	unsigned int mtu = dst_mtu(dst);
	struct net *net = dev_net(dev);

	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;
}

Contributors
Person Tokens Prop Commits CommitProp
al viro al viro 44 45.36% 1 16.67%
david s. miller david s. miller 31 31.96% 1 16.67%
daniel lezcano daniel lezcano 14 14.43% 2 33.33%
shirley ma shirley ma 7 7.22% 1 16.67%
hideaki yoshifuji hideaki yoshifuji 1 1.03% 1 16.67%
Total 97 100.00% 6 100.00%



static unsigned int ip6_mtu(const struct dst_entry *dst)
{
	const struct rt6_info *rt = (const struct rt6_info *)dst;
	unsigned int mtu = rt->rt6i_pmtu;
	struct inet6_dev *idev;

	if (mtu)
		goto out;

	mtu = dst_metric_raw(dst, RTAX_MTU);
	if (mtu)
		goto out;

	mtu = IPV6_MIN_MTU;

	rcu_read_lock();
	idev = __in6_dev_get(dst->dev);
	if (idev)
		mtu = idev->cnf.mtu6;
	rcu_read_unlock();

out:
	return min_t(unsigned int, mtu, IP6_MAX_MTU);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 44 41.51% 1 20.00%
martin kafai lau martin kafai lau 30 28.30% 1 20.00%
steffen klassert steffen klassert 19 17.92% 2 40.00%
eric dumazet eric dumazet 13 12.26% 1 20.00%
Total 106 100.00% 5 100.00%


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 flowi6 *fl6)
{
	struct dst_entry *dst;
	struct rt6_info *rt;
	struct inet6_dev *idev = in6_dev_get(dev);
	struct net *net = dev_net(dev);

	if (unlikely(!idev))
		return ERR_PTR(-ENODEV);

	rt = ip6_dst_alloc(net, dev, 0);
	if (unlikely(!rt)) {
		in6_dev_put(idev);
		dst = ERR_PTR(-ENOMEM);
		goto out;
	}

	rt->dst.flags |= DST_HOST;
	rt->dst.output  = ip6_output;
	atomic_set(&rt->dst.__refcnt, 1);
	rt->rt6i_gateway  = fl6->daddr;
	rt->rt6i_dst.addr = fl6->daddr;
	rt->rt6i_dst.plen = 128;
	rt->rt6i_idev     = idev;
	dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 0);

	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);

	dst = xfrm_lookup(net, &rt->dst, flowi6_to_flowi(fl6), NULL, 0);

out:
	return dst;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 118 51.53% 5 21.74%
hideaki yoshifuji hideaki yoshifuji 35 15.28% 5 21.74%
zheng yan zheng yan 24 10.48% 1 4.35%
gao feng gao feng 11 4.80% 1 4.35%
daniel lezcano daniel lezcano 10 4.37% 2 8.70%
julian anastasov julian anastasov 8 3.49% 1 4.35%
patrick mchardy patrick mchardy 7 3.06% 1 4.35%
eric dumazet eric dumazet 5 2.18% 1 4.35%
shirley ma shirley ma 3 1.31% 1 4.35%
benjamin thery benjamin thery 3 1.31% 1 4.35%
thomas graf thomas graf 2 0.87% 1 4.35%
li rongqing li rongqing 1 0.44% 1 4.35%
alexey dobriyan alexey dobriyan 1 0.44% 1 4.35%
kazunori miyazawa kazunori miyazawa 1 0.44% 1 4.35%
Total 229 100.00% 23 100.00%



int icmp6_dst_gc(void)
{
	struct dst_entry *dst, **pprev;
	int more = 0;

	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;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 72 78.26% 1 25.00%
thomas graf thomas graf 10 10.87% 1 25.00%
stephen hemminger stephen hemminger 6 6.52% 1 25.00%
hideaki yoshifuji hideaki yoshifuji 4 4.35% 1 25.00%
Total 92 100.00% 4 100.00%



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);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 110 100.00% 1 100.00%
Total 110 100.00% 1 100.00%



static int ip6_dst_gc(struct dst_ops *ops)
{
	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;
	int entries;

	entries = dst_entries_get_fast(ops);
	if (time_after(rt_last_gc + rt_min_interval, jiffies) &&
	    entries <= rt_max_size)
		goto out;

	net->ipv6.ip6_rt_gc_expire++;
	fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net, true);
	entries = dst_entries_get_slow(ops);
	if (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 entries > rt_max_size;
}

Contributors
Person Tokens Prop Commits CommitProp
daniel lezcano daniel lezcano 68 38.64% 5 31.25%
pre-git pre-git 38 21.59% 3 18.75%
benjamin thery benjamin thery 36 20.45% 1 6.25%
eric dumazet eric dumazet 17 9.66% 1 6.25%
alexey dobriyan alexey dobriyan 10 5.68% 1 6.25%
randy dunlap randy dunlap 2 1.14% 1 6.25%
arnaldo carvalho de melo arnaldo carvalho de melo 2 1.14% 1 6.25%
michal kubecek michal kubecek 2 1.14% 2 12.50%
li rongqing li rongqing 1 0.57% 1 6.25%
Total 176 100.00% 16 100.00%



static int ip6_convert_metrics(struct mx6_config *mxc,
			       const struct fib6_config *cfg)
{
	bool ecn_ca = false;
	struct nlattr *nla;
	int remaining;
	u32 *mp;

	if (!cfg->fc_mx)
		return 0;

	mp = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL);
	if (unlikely(!mp))
		return -ENOMEM;

	nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) {
		int type = nla_type(nla);
		u32 val;

		if (!type)
			continue;
		if (unlikely(type > RTAX_MAX))
			goto err;

		if (type == RTAX_CC_ALGO) {
			char tmp[TCP_CA_NAME_MAX];

			nla_strlcpy(tmp, nla, sizeof(tmp));
			val = tcp_ca_get_key_by_name(tmp, &ecn_ca);
			if (val == TCP_CA_UNSPEC)
				goto err;
		} else {
			val = nla_get_u32(nla);
		}
		if (type == RTAX_HOPLIMIT && val > 255)
			val = 255;
		if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK))
			goto err;

		mp[type - 1] = val;
		__set_bit(type - 1, mxc->mx_valid);
	}

	if (ecn_ca) {
		__set_bit(RTAX_FEATURES - 1, mxc->mx_valid);
		mp[RTAX_FEATURES - 1] |= DST_FEATURE_ECN_CA;
	}

	mxc->mx = mp;
	return 0;
 err:
	kfree(mp);
	return -EINVAL;
}

Contributors
Person Tokens Prop Commits CommitProp
florian westphal florian westphal 139 53.05% 1 14.29%
daniel borkmann daniel borkmann 108 41.22% 4 57.14%
paolo abeni paolo abeni 14 5.34% 1 14.29%
ian morris ian morris 1 0.38% 1 14.29%
Total 262 100.00% 7 100.00%



static struct rt6_info *ip6_nh_lookup_table(struct net *net,
					    struct fib6_config *cfg,
					    const struct in6_addr *gw_addr)
{
	struct flowi6 fl6 = {
		.flowi6_oif = cfg->fc_ifindex,
		.daddr = *gw_addr,
		.saddr = cfg->fc_prefsrc,
        };
	struct fib6_table *table;
	struct rt6_info *rt;
	int flags = RT6_LOOKUP_F_IFACE;

	table = fib6_get_table(net, cfg->fc_table);
	if (!table)
		return NULL;

	if (!ipv6_addr_any(&cfg->fc_prefsrc))
		flags |= RT6_LOOKUP_F_HAS_SADDR;

	rt = ip6_pol_route(net, table, cfg->fc_ifindex, &fl6, flags);

	/* if table lookup failed, fall back to full lookup */
	if (rt == net->ipv6.ip6_null_entry) {
		ip6_rt_put(rt);
		rt = NULL;
	}

	return rt;
}

Contributors
Person Tokens Prop Commits CommitProp
david ahern david ahern 141 99.30% 1 50.00%
paolo abeni paolo abeni 1 0.70% 1 50.00%
Total 142 100.00% 2 100.00%



static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg)
{
	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;
	int err = -EINVAL;

	if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128)
		goto out;
#ifndef CONFIG_IPV6_SUBTREES
	if (cfg->fc_src_len)
		goto out;
#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;

	err = -ENOBUFS;
	if (cfg->fc_nlinfo.nlh &&
	    !(cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_CREATE)) {
		table = fib6_get_table(net, cfg->fc_table);
		if (!table) {
			pr_warn("NLM_F_CREATE should be specified when creating new route\n");
			table = fib6_new_table(net, cfg->fc_table);
		}
	} else {
		table = fib6_new_table(net, cfg->fc_table);
	}

	if (!table)
		goto out;

	rt = ip6_dst_alloc(net, NULL,
			   (cfg->fc_flags & RTF_ADDRCONF) ? 0 : DST_NOCOUNT);

	if (!rt) {
		err = -ENOMEM;
		goto out;
	}

	if (cfg->fc_flags & RTF_EXPIRES)
		rt6_set_expires(rt, jiffies +
				clock_t_to_jiffies(cfg->fc_expires));
	else
		rt6_clean_expires(rt);

	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 if (cfg->fc_flags & RTF_LOCAL)
		rt->dst.input = ip6_input;
	else
		rt->dst.input = ip6_forward;

	rt->dst.output = ip6_output;

	if (cfg->fc_encap) {
		struct lwtunnel_state *lwtstate;

		err = lwtunnel_build_state(dev, cfg->fc_encap_type,
					   cfg->fc_encap, AF_INET6, cfg,
					   &lwtstate);
		if (err)
			goto out;
		rt->dst.lwtstate = lwtstate_get(lwtstate);
		if (lwtunnel_output_redirect(rt->dst.lwtstate)) {
			rt->dst.lwtstate->orig_output = rt->dst.output;
			rt->dst.output = lwtunnel_output;
		}
		if (lwtunnel_input_redirect(rt->dst.lwtstate)) {
			rt->dst.lwtstate->orig_input = rt->dst.input;
			rt->dst.input = lwtunnel_input;
		}
	}

	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) &&
	     !(cfg->fc_flags & RTF_LOCAL))) {
		/* 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->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
		switch (cfg->fc_type) {
		case RTN_BLACKHOLE:
			rt->dst.error = -EINVAL;
			rt->dst.output = dst_discard_out;
			rt->dst.input = dst_discard;
			break;
		case RTN_PROHIBIT:
			rt->dst.error = -EACCES;
			rt->dst.output = ip6_pkt_prohibit_out;
			rt->dst.input = ip6_pkt_prohibit;
			break;
		case RTN_THROW:
		case RTN_UNREACHABLE:
		default:
			rt->dst.error = (cfg->fc_type == RTN_THROW) ? -EAGAIN
					: (cfg->fc_type == RTN_UNREACHABLE)
					? -EHOSTUNREACH : -ENETUNREACH;
			rt->dst.output = ip6_pkt_discard_out;
			rt->dst.input = ip6_pkt_discard;
			break;
		}
		goto install_route;
	}

	if (cfg->fc_flags & RTF_GATEWAY) {
		const struct in6_addr *gw_addr;
		int gwa_type;

		gw_addr = &cfg->fc_gateway;
		gwa_type = ipv6_addr_type(gw_addr);

		/* if gw_addr is local we will fail to detect this in case
                 * address is still TENTATIVE (DAD in progress). rt6_lookup()
                 * will return already-added prefix route via interface that
                 * prefix route was assigned to, which might be non-loopback.
                 */
		err = -EINVAL;
		if (ipv6_chk_addr_and_flags(net, gw_addr,
					    gwa_type & IPV6_ADDR_LINKLOCAL ?
					    dev : NULL, 0, 0))
			goto out;

		rt->rt6i_gateway = *gw_addr;

		if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) {
			struct rt6_info *grt = NULL;

			/* 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
                         */
			if (!(gwa_type & IPV6_ADDR_UNICAST))
				goto out;

			if (cfg->fc_table) {
				grt = ip6_nh_lookup_table(net, cfg, gw_addr);

				if (grt) {
					if (grt->rt6i_flags & RTF_GATEWAY ||
					    (dev && dev != grt->dst.dev)) {
						ip6_rt_put(grt);
						grt = NULL;
					}
				}
			}

			if (!grt)
				grt = rt6_lookup(net, gw_addr, NULL,
						 cfg->fc_ifindex, 1);

			err = -EHOSTUNREACH;
			if (!grt)
				goto out;
			if (dev) {
				if (dev != grt->dst.dev) {
					ip6_rt_put(grt);
					goto out;
				}
			} else {
				dev = grt->dst.dev;
				idev = grt->rt6i_idev;
				dev_hold(dev);
				in6_dev_hold(grt->rt6i_idev);
			}
			if (!(grt->rt6i_flags & RTF_GATEWAY))
				err = 0;
			ip6_rt_put(grt);

			if (err)
				goto out;
		}
		err = -EINVAL;
		if (!dev || (dev->flags & IFF_LOOPBACK))
			goto out;
	}

	err = -ENODEV;
	if (!dev)
		goto out;

	if (!ipv6_addr_any(&cfg->fc_prefsrc)) {
		if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) {
			err = -EINVAL;
			goto out;
		}
		rt->rt6i_prefsrc.addr = cfg->fc_prefsrc;
		rt->rt6i_prefsrc.plen = 128;
	} else
		rt->rt6i_prefsrc.plen = 0;

	rt->rt6i_flags = cfg->fc_flags;

install_route:
	rt->dst.dev = dev;
	rt->rt6i_idev = idev;
	rt->rt6i_table = table;

	cfg->fc_nlinfo.nl_net = dev_net(dev);

	return rt;
out:
	if (dev)
		dev_put(dev);
	if (idev)
		in6_dev_put(idev);
	if (rt)
		dst_free(&rt->dst);

	return ERR_PTR(err);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 419 32.68% 12 18.46%
hideaki yoshifuji hideaki yoshifuji 127 9.91% 9 13.85%
roopa prabhu roopa prabhu 109 8.50% 4 6.15%
thomas graf thomas graf 85 6.63% 2 3.08%
daniel walter daniel walter 64 4.99% 1 1.54%
matti vaittinen matti vaittinen 60 4.68% 1 1.54%
nicolas dichtel nicolas dichtel 60 4.68% 4 6.15%
kamala r kamala r 53 4.13% 1 1.54%
tom herbert tom herbert 45 3.51% 2 3.08%
vincent bernat vincent bernat 39 3.04% 1 1.54%
florian westphal florian westphal 37 2.89% 2 3.08%
daniel lezcano daniel lezcano 28 2.18% 4 6.15%
maciej zenczykowski maciej zenczykowski 26 2.03% 1 1.54%
david ahern david ahern 24 1.87% 1 1.54%
david s. miller david s. miller 18 1.40% 6 9.23%
jiri benc jiri benc 17 1.33% 1 1.54%
nikola forro nikola forro 14 1.09% 1 1.54%
gao feng gao feng 14 1.09% 1 1.54%
mathew richardson mathew richardson 11 0.86% 1 1.54%
sabrina dubroca sabrina dubroca 10 0.78% 1 1.54%
patrick mchardy patrick mchardy 8 0.62% 1 1.54%
benjamin thery benjamin thery 3 0.23% 1 1.54%
alexey dobriyan alexey dobriyan 3 0.23% 1 1.54%
eric w. biederman eric w. biederman 2 0.16% 2 3.08%
americo wang americo wang 2 0.16% 1 1.54%
joe perches joe perches 2 0.16% 1 1.54%
eric dumazet eric dumazet 1 0.08% 1 1.54%
jamal hadi salim jamal hadi salim 1 0.08% 1 1.54%
Total 1282 100.00% 65 100.00%



int ip6_route_add(struct fib6_config *cfg)
{
	struct mx6_config mxc = { .mx = NULL, };
	struct rt6_info *rt;
	int err;

	rt = ip6_route_info_create(cfg);
	if (IS_ERR(rt)) {
		err = PTR_ERR(rt);
		rt = NULL;
		goto out;
	}

	err = ip6_convert_metrics(&mxc, cfg);
	if (err)
		goto out;

	err = __ip6_ins_rt(rt, &cfg->fc_nlinfo, &mxc);

	kfree(mxc.mx);

	return err;
out:
	if (rt)
		dst_free(&rt->dst);

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 58 49.15% 2 14.29%
florian westphal florian westphal 31 26.27% 1 7.14%
pre-git pre-git 17 14.41% 5 35.71%
thomas graf thomas graf 5 4.24% 2 14.29%
hideaki yoshifuji hideaki yoshifuji 3 2.54% 1 7.14%
patrick mchardy patrick mchardy 2 1.69% 1 7.14%
michal kubecek michal kubecek 1 0.85% 1 7.14%
mathew richardson mathew richardson 1 0.85% 1 7.14%
Total 118 100.00% 14 100.00%



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->dst.dev);

	if (rt == net->ipv6.ip6_null_entry ||
	    rt->dst.flags & DST_NOCACHE) {
		err = -ENOENT;
		goto out;
	}

	table = rt->rt6i_table;
	write_lock_bh(&table->tb6_lock);
	err = fib6_del(rt, info);
	write_unlock_bh(&table->tb6_lock);

out:
	ip6_rt_put(rt);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 30 28.04% 4 23.53%
thomas graf thomas graf 19 17.76% 3 17.65%
gao feng gao feng 14 13.08% 1 5.88%
daniel lezcano daniel lezcano 12 11.21% 1 5.88%
martin kafai lau martin kafai lau 8 7.48% 1 5.88%
patrick mchardy patrick mchardy 8 7.48% 1 5.88%
herbert xu herbert xu 5 4.67% 1 5.88%
mathew richardson mathew richardson 3 2.80% 1 5.88%
hideaki yoshifuji hideaki yoshifuji 3 2.80% 1 5.88%
david s. miller david s. miller 3 2.80% 1 5.88%
jamal hadi salim jamal hadi salim 1 0.93% 1 5.88%
americo wang americo wang 1 0.93% 1 5.88%
Total 107 100.00% 17 100.00%



int ip6_del_rt(struct rt6_info *rt)
{
	struct nl_info info = {
		.nl_net = dev_net(rt->dst.dev),
        };
	return __ip6_del_rt(rt, &info);
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 17 45.95% 1 16.67%
denis v. lunev denis v. lunev 12 32.43% 2 33.33%
david s. miller david s. miller 3 8.11% 1 16.67%
hideaki yoshifuji hideaki yoshifuji 3 8.11% 1 16.67%
daniel lezcano daniel lezcano 2 5.41% 1 16.67%
Total 37 100.00% 6 100.00%



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)
		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 ((rt->rt6i_flags & RTF_CACHE) &&
			    !(cfg->fc_flags & RTF_CACHE))
				continue;
			if (cfg->fc_ifindex &&
			    (!rt->dst.dev ||
			     rt->dst.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;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 138 57.26% 9 39.13%
thomas graf thomas graf 60 24.90% 3 13.04%
martin kafai lau martin kafai lau 20 8.30% 1 4.35%
david s. miller david s. miller 8 3.32% 2 8.70%
daniel lezcano daniel lezcano 6 2.49% 2 8.70%
eric dumazet eric dumazet 3 1.24% 1 4.35%
hideaki yoshifuji hideaki yoshifuji 2 0.83% 1 4.35%
stephen rothwell stephen rothwell 1 0.41% 1 4.35%
jamal hadi salim jamal hadi salim 1 0.41% 1 4.35%
james morris james morris 1 0.41% 1 4.35%
mathew richardson mathew richardson 1 0.41% 1 4.35%
Total 241 100.00% 23 100.00%



static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb)
{
	struct netevent_redirect netevent;
	struct rt6_info *rt, *nrt = NULL;
	struct ndisc_options ndopts;
	struct inet6_dev *in6_dev;
	struct neighbour *neigh;
	struct rd_msg *msg;
	int optlen, on_link;
	u8 *lladdr;

	optlen = skb_tail_pointer(skb) - skb_transport_header(skb);
	optlen -= sizeof(*msg);

	if (optlen < 0) {
		net_dbg_ratelimited("rt6_do_redirect: packet too short\n");
		return;
	}

	msg = (struct rd_msg *)icmp6_hdr(skb);

	if (ipv6_addr_is_multicast(&msg->dest)) {
		net_dbg_ratelimited("rt6_do_redirect: destination address is multicast\n");
		return;
	}

	on_link = 0;
	if (ipv6_addr_equal(&msg->dest, &msg->target)) {
		on_link = 1;
	} else if (ipv6_addr_type(&msg->target) !=
		   (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) {
		net_dbg_ratelimited("rt6_do_redirect: target address is not link-local unicast\n");
		return;
	}

	in6_dev = __in6_dev_get(skb->dev);
	if (!in6_dev)
		return;
	if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects)
		return;

	/* RFC2461 8.1:
         *      The IP source address of the Redirect MUST be the same as the current
         *      first-hop router for the specified ICMP Destination Address.
         */

	if (!ndisc_parse_options(skb->dev, msg->opt, optlen, &ndopts)) {
		net_dbg_ratelimited("rt6_redirect: invalid ND options\n");
		return;
	}

	lladdr = NULL;
	if (ndopts.nd_opts_tgt_lladdr) {
		lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr,
					     skb->dev);
		if (!lladdr) {
			net_dbg_ratelimited("rt6_redirect: invalid link-layer address length\n");
			return;
		}
	}

	rt = (struct rt6_info *) dst;
	if (rt->rt6i_flags & RTF_REJECT) {
		net_dbg_ratelimited("rt6_redirect: source isn't a valid nexthop for redirect target\n");
		return;
	}

	/* 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);

	neigh = __neigh_lookup(&nd_tbl, &msg->target, skb->dev, 1);
	if (!neigh)
		return;

	/*
         *      We have finally decided to accept it.
         */

	ndisc_update(skb->dev, 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)),
		     NDISC_REDIRECT, &ndopts);

	nrt = ip6_rt_cache_alloc(rt, &msg->dest, NULL);
	if (!nrt)
		goto out;

	nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE;
	if (on_link)
		nrt->rt6i_flags &= ~RTF_GATEWAY;

	nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key;

	if (ip6_ins_rt(nrt))
		goto out;

	netevent.old = &rt->dst;
	netevent.new = &nrt->dst;
	netevent.daddr = &msg->dest;
	netevent.neigh = neigh;
	call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);

	if (rt->rt6i_flags & RTF_CACHE) {
		rt = (struct rt6_info *) dst_clone(&rt->dst);
		ip6_del_rt(rt);
	}

out:
	neigh_release(neigh);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 304 59.03% 5 20.83%
hideaki yoshifuji hideaki yoshifuji 77 14.95% 6 25.00%
pre-git pre-git 75 14.56% 5 20.83%
tom tucker tom tucker 26 5.05% 1 4.17%
alexander aring alexander aring 14 2.72% 1 4.17%
simon horman simon horman 6 1.17% 1 4.17%
matthias schiffer matthias schiffer 3 0.58% 1 4.17%
daniel lezcano daniel lezcano 3 0.58% 1 4.17%
martin kafai lau martin kafai lau 3 0.58% 1 4.17%
eric dumazet eric dumazet 2 0.39% 1 4.17%
alexey dobriyan alexey dobriyan 2 0.39% 1 4.17%
Total 515 100.00% 24 100.00%

/*
 *      Misc support functions
 */



static void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
{
	BUG_ON(from->dst.from);

	rt->rt6i_flags &= ~RTF_EXPIRES;
	dst_hold(&from->dst);
	rt->dst.from = &from->dst;
	dst_init_metrics(&rt->dst, dst_metrics_ptr(&from->dst), true);
}

Contributors
Person Tokens Prop Commits CommitProp
martin kafai lau martin kafai lau 69 100.00% 1 100.00%
Total 69 100.00% 1 100.00%



static void ip6_rt_copy_init(struct rt6_info *rt, struct rt6_info *ort)
{
	rt->dst.input = ort->dst.input;
	rt->dst.output = ort->dst.output;
	rt->rt6i_dst = ort->rt6i_dst;
	rt->dst.error = ort->dst.error;
	rt->rt6i_idev = ort->rt6i_idev;
	if (rt->rt6i_idev)
		in6_dev_hold(rt->rt6i_idev);
	rt->dst.lastuse = jiffies;
	rt->rt6i_gateway = ort->rt6i_gateway;
	rt->rt6i_flags = ort->rt6i_flags;
	rt6_set_from(rt, ort);
	rt->rt6i_metric = ort->rt6i_metric;
#ifdef CONFIG_IPV6_SUBTREES
	rt->rt6i_src = ort->rt6i_src;
#endif
	rt->rt6i_prefsrc = ort->rt6i_prefsrc;
	rt->rt6i_table = ort->rt6i_table;
	rt->dst.lwtstate = lwtstate_get(ort->dst.lwtstate);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 73 44.51% 5 26.32%
hideaki yoshifuji hideaki yoshifuji 21 12.80% 1 5.26%
martin kafai lau martin kafai lau 10 6.10% 1 5.26%
ville nuorvala ville nuorvala 10 6.10% 1 5.26%
nicolas dichtel nicolas dichtel 10 6.10% 2 10.53%
thomas graf thomas graf 8 4.88% 1 5.26%
gao feng gao feng 8 4.88% 1 5.26%
florian westphal florian westphal 7 4.27% 1 5.26%
jiri benc jiri benc 6 3.66% 1 5.26%
eric dumazet eric dumazet 5 3.05% 1 5.26%
zheng yan zheng yan 2 1.22% 1 5.26%
alexey dobriyan alexey dobriyan 2 1.22% 1 5.26%
benjamin thery benjamin thery 1 0.61% 1 5.26%
david s. miller david s. miller 1 0.61% 1 5.26%
Total 164 100.00% 19 100.00%

#ifdef CONFIG_IPV6_ROUTE_INFO


static struct rt6_info *rt6_get_route_info(struct net *net,
					   const struct in6_addr *prefix, int prefixlen,
					   const 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)
		return NULL;

	read_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->dst.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:
	read_unlock_bh(&table->tb6_lock);
	return rt;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 143 75.66% 1 11.11%
thomas graf thomas graf 28 14.81% 1 11.11%
daniel lezcano daniel lezcano 7 3.70% 2 22.22%
eric dumazet eric dumazet 5 2.65% 2 22.22%
david s. miller david s. miller 4 2.12% 2 22.22%
li rongqing li rongqing 2 1.06% 1 11.11%
Total 189 100.00% 9 100.00%



static struct rt6_info *rt6_add_route_info(struct net *net,
					   const struct in6_addr *prefix, int prefixlen,
					   const struct in6_addr *gwaddr, int ifindex,
					   unsigned int pref)
{
	struct fib6_config cfg = {
		.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.portid = 0,
		.fc_nlinfo.nlh = NULL,
		.fc_nlinfo.nl_net = net,
        };

	cfg.fc_table = l3mdev_fib_table_by_index(net, ifindex) ? : RT6_TABLE_INFO;
	cfg.fc_dst = *prefix;
	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);
}
Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 75 49.02% 2 20.00%
thomas graf thomas graf 28 18.30% 1 10.00%
daniel lezcano daniel lezcano 27 17.65% 1 10.00%
david ahern david ahern 14 9.15% 1 10.00%
alexey dobriyan alexey dobriyan 4 2.61% 1 10.00%
eric dumazet eric dumazet 3 1.96% 2 20.00%
eric w. biederman eric w. biederman 1 0.65% 1 10.00%
rami rosen rami rosen 1 0.65% 1 10.00%
Total 153 100.00% 10 100.00%

#endif



struct rt6_info *rt6_get_dflt_router(const 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)
		return NULL;

	read_lock_bh(&table->tb6_lock);
	for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) {
		if (dev == rt->dst.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);
	read_unlock_bh(&table->tb6_lock);
	return rt;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 82 57.75% 6 33.33%
hideaki yoshifuji hideaki yoshifuji 24 16.90% 3 16.67%
thomas graf thomas graf 23 16.20% 1 5.56%
eric dumazet eric dumazet 4 2.82% 2 11.11%
david s. miller david s. miller 4 2.82% 2 11.11%
li rongqing li rongqing 2 1.41% 1 5.56%
daniel lezcano daniel lezcano 2 1.41% 2 11.11%
james morris james morris 1 0.70% 1 5.56%
Total 142 100.00% 18 100.00%



struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr,
				     struct net_device *dev,
				     unsigned int pref)
{
	struct fib6_config cfg = {
		.fc_table	= l3mdev_fib_table(dev) ? : 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.portid = 0,
		.fc_nlinfo.nlh = NULL,
		.fc_nlinfo.nl_net = dev_net(dev),
        };

	cfg.fc_gateway = *gwaddr;

	ip6_route_add(&cfg);

	return rt6_get_dflt_router(gwaddr, dev);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 46 40.35% 4 28.57%
thomas graf thomas graf 23 20.18% 1 7.14%
daniel lezcano daniel lezcano 20 17.54% 1 7.14%
hideaki yoshifuji hideaki yoshifuji 14 12.28% 3 21.43%
david ahern david ahern 6 5.26% 1 7.14%
alexey dobriyan alexey dobriyan 2 1.75% 1 7.14%
eric w. biederman eric w. biederman 1 0.88% 1 7.14%
rami rosen rami rosen 1 0.88% 1 7.14%
eric dumazet eric dumazet 1 0.88% 1 7.14%
Total 114 100.00% 14 100.00%



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)
		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) &&
		    (!rt->rt6i_idev || rt->rt6i_idev->cnf.accept_ra != 2)) {
			dst_hold(&rt->dst);
			read_unlock_bh(&table->tb6_lock);
			ip6_del_rt(rt);
			goto restart;
		}
	}
	read_unlock_bh(&table->tb6_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 69 52.67% 4 36.36%
thomas graf thomas graf 30 22.90% 1 9.09%
lorenzo colitti lorenzo colitti 17 12.98% 1 9.09%
daniel lezcano daniel lezcano 6 4.58% 2 18.18%
hideaki yoshifuji hideaki yoshifuji 5 3.82% 1 9.09%
eric dumazet eric dumazet 3 2.29% 1 9.09%
david s. miller david s. miller 1 0.76% 1 9.09%
Total 131 100.00% 11 100.00%



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 = l3mdev_fib_table_by_index(net, rtmsg->rtmsg_ifindex) ?
			 : 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;

	cfg->fc_dst = rtmsg->rtmsg_dst;
	cfg->fc_src = rtmsg->rtmsg_src;
	cfg->fc_gateway = rtmsg->rtmsg_gateway;
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 104 80.00% 1 20.00%
david ahern david ahern 10 7.69% 1 20.00%
benjamin thery benjamin thery 7 5.38% 1 20.00%
daniel lezcano daniel lezcano 6 4.62% 1 20.00%
alexey dobriyan alexey dobriyan 3 2.31% 1 20.00%
Total 130 100.00% 5 100.00%



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 (!ns_capable(net->user_ns, 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;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 115 79.86% 5 50.00%
thomas graf thomas graf 15 10.42% 1 10.00%
daniel lezcano daniel lezcano 7 4.86% 1 10.00%
eric w. biederman eric w. biederman 5 3.47% 1 10.00%
al viro al viro 1 0.69% 1 10.00%
david s. miller david s. miller 1 0.69% 1 10.00%
Total 144 100.00% 10 100.00%

/*
 *      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;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 35 29.41% 2 14.29%
pre-git pre-git 31 26.05% 5 35.71%
denis v. lunev denis v. lunev 21 17.65% 1 7.14%
lv liangying lv liangying 20 16.81% 1 7.14%
arnaldo carvalho de melo arnaldo carvalho de melo 4 3.36% 2 14.29%
thomas graf thomas graf 4 3.36% 1 7.14%
eric dumazet eric dumazet 3 2.52% 1 7.14%
brian haley brian haley 1 0.84% 1 7.14%
Total 119 100.00% 14 100.00%



static int ip6_pkt_discard(struct sk_buff *skb)
{
	return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES);
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 19 90.48% 1 50.00%
hideaki yoshifuji hideaki yoshifuji 2 9.52% 1 50.00%
Total 21 100.00% 2 100.00%



static int ip6_pkt_discard_out(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	skb->dev = skb_dst(skb)->dev;
	return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
}

Contributors
Person Tokens Prop Commits CommitProp
james morris james morris 13 30.95% 1 12.50%
eric dumazet eric dumazet 8 19.05% 2 25.00%
dave craig dave craig 6 14.29% 1 12.50%
hideaki yoshifuji hideaki yoshifuji 5 11.90% 1 12.50%
eric w. biederman eric w. biederman 5 11.90% 1 12.50%
herbert xu herbert xu 4 9.52% 1 12.50%
arnaldo carvalho de melo arnaldo carvalho de melo 1 2.38% 1 12.50%
Total 42 100.00% 8 100.00%



static int ip6_pkt_prohibit(struct sk_buff *skb)
{
	return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 19 90.48% 1 50.00%
hideaki yoshifuji hideaki yoshifuji 2 9.52% 1 50.00%
Total 21 100.00% 2 100.00%



static int ip6_pkt_prohibit_out(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	skb->dev = skb_dst(skb)->dev;
	return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 24 57.14% 1 20.00%
eric dumazet eric dumazet 8 19.05% 2 40.00%
eric w. biederman eric w. biederman 5 11.90% 1 20.00%
hideaki yoshifuji hideaki yoshifuji 5 11.90% 1 20.00%
Total 42 100.00% 5 100.00%

/*
 *      Allocate a dst for local (unicast / anycast) address.
 */



struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
				    const struct in6_addr *addr,
				    bool anycast)
{
	u32 tb_id;
	struct net *net = dev_net(idev->dev);
	struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev,
					    DST_NOCOUNT);
	if (!rt)
		return ERR_PTR(-ENOMEM);

	in6_dev_hold(idev);

	rt->dst.flags |= DST_HOST;
	rt->dst.input = ip6_input;
	rt->dst.output = ip6_output;
	rt->rt6i_idev = idev;

	rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP;
	if (anycast)
		rt->rt6i_flags |= RTF_ANYCAST;
	else
		rt->rt6i_flags |= RTF_LOCAL;

	rt->rt6i_gateway  = *addr;
	rt->rt6i_dst.addr = *addr;
	rt->rt6i_dst.plen = 128;
	tb_id = l3mdev_fib_table(idev->dev) ? : RT6_TABLE_LOCAL;
	rt->rt6i_table = fib6_get_table(net, tb_id);
	rt->dst.flags |= DST_NOCACHE;

	atomic_set(&rt->dst.__refcnt, 1);

	return rt;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 79 40.72% 5 18.52%
hideaki yoshifuji hideaki yoshifuji 38 19.59% 6 22.22%
david ahern david ahern 16 8.25% 1 3.70%
alexey kuznetsov alexey kuznetsov 12 6.19% 1 3.70%
daniel lezcano daniel lezcano 11 5.67% 2 7.41%
david s. miller david s. miller 9 4.64% 6 22.22%
martin kafai lau martin kafai lau 8 4.12% 1 3.70%
thomas graf thomas graf 8 4.12% 1 3.70%
julian anastasov julian anastasov 7 3.61% 1 3.70%
benjamin thery benjamin thery 3 1.55% 1 3.70%
alexey dobriyan alexey dobriyan 2 1.03% 1 3.70%
hannes frederic sowa hannes frederic sowa 1 0.52% 1 3.70%
Total 194 100.00% 27 100.00%

/* remove deleted ip from prefsrc entries */

struct arg_dev_net_ip {
	
struct net_device *dev;
	
struct net *net;
	
struct in6_addr *addr;
};



static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg)
{
	struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev;
	struct net *net = ((struct arg_dev_net_ip *)arg)->net;
	struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr;

	if (((void *)rt->dst.dev == dev || !dev) &&
	    rt != net->ipv6.ip6_null_entry &&
	    ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) {
		/* remove prefsrc entry */
		rt->rt6i_prefsrc.plen = 0;
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
daniel walter daniel walter 112 96.55% 1 33.33%
david s. miller david s. miller 4 3.45% 2 66.67%
Total 116 100.00% 3 100.00%



void rt6_remove_prefsrc(struct inet6_ifaddr *ifp)
{
	struct net *net = dev_net(ifp->idev->dev);
	struct arg_dev_net_ip adni = {
		.dev = ifp->idev->dev,
		.net = net,
		.addr = &ifp->addr,
        };
	fib6_clean_all(net, fib6_remove_prefsrc, &adni);
}

Contributors
Person Tokens Prop Commits CommitProp
daniel walter daniel walter 62 100.00% 1 100.00%
Total 62 100.00% 1 100.00%


#define RTF_RA_ROUTER		(RTF_ADDRCONF | RTF_DEFAULT | RTF_GATEWAY)

#define RTF_CACHE_GATEWAY	(RTF_GATEWAY | RTF_CACHE)

/* Remove routers and update dst entries when gateway turn into host. */


static int fib6_clean_tohost(struct rt6_info *rt, void *arg)
{
	struct in6_addr *gateway = (struct in6_addr *)arg;

	if ((((rt->rt6i_flags & RTF_RA_ROUTER) == RTF_RA_ROUTER) ||
	     ((rt->rt6i_flags & RTF_CACHE_GATEWAY) == RTF_CACHE_GATEWAY)) &&
	     ipv6_addr_equal(gateway, &rt->rt6i_gateway)) {
		return -1;
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
duan jiong duan jiong 74 100.00% 1 100.00%
Total 74 100.00% 1 100.00%



void rt6_clean_tohost(struct net *net, struct in6_addr *gateway)
{
	fib6_clean_all(net, fib6_clean_tohost, gateway);
}

Contributors
Person Tokens Prop Commits CommitProp
duan jiong duan jiong 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%


struct arg_dev_net {
	
struct net_device *dev;
	
struct net *net;
};



static int fib6_ifdown(struct rt6_info *rt, void *arg)
{
	const struct arg_dev_net *adn = arg;
	const struct net_device *dev = adn->dev;

	if ((rt->dst.dev == dev || !dev) &&
	    rt != adn->net->ipv6.ip6_null_entry)
		return -1;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 35 53.85% 2 33.33%
daniel lezcano daniel lezcano 16 24.62% 1 16.67%
stephen hemminger stephen hemminger 10 15.38% 1 16.67%
david s. miller david s. miller 4 6.15% 2 33.33%
Total 65 100.00% 6 100.00%



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, &adn);
	icmp6_clean_all(fib6_ifdown, &adn);
	if (dev)
		rt6_uncached_list_flush_dev(net, dev);
}

Contributors
Person Tokens Prop Commits CommitProp
daniel lezcano daniel lezcano 25 41.67% 2 22.22%
pre-git pre-git 15 25.00% 3 33.33%
david s. miller david s. miller 8 13.33% 1 11.11%
martin kafai lau martin kafai lau 7 11.67% 1 11.11%
eric w. biederman eric w. biederman 4 6.67% 1 11.11%
thomas graf thomas graf 1 1.67% 1 11.11%
Total 60 100.00% 9 100.00%


struct rt6_mtu_change_arg {
	
struct net_device *dev;
	
unsigned int 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)
		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->dst.dev == arg->dev &&
	    !dst_metric_locked(&rt->dst, RTAX_MTU)) {
		if (rt->rt6i_flags & RTF_CACHE) {
			/* For RTF_CACHE with rt6i_pmtu == 0
                         * (i.e. a redirected route),
                         * the metrics of its rt->dst.from has already
                         * been updated.
                         */
			if (rt->rt6i_pmtu && rt->rt6i_pmtu > arg->mtu)
				rt->rt6i_pmtu = arg->mtu;
		} else if (dst_mtu(&rt->dst) >= arg->mtu ||
			   (dst_mtu(&rt->dst) < arg->mtu &&
			    dst_mtu(&rt->dst) == idev->cnf.mtu6)) {
			dst_metric_set(&rt->dst, RTAX_MTU, arg->mtu);
		}
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 51 29.65% 3 20.00%
shirley ma shirley ma 47 27.33% 1 6.67%
martin kafai lau martin kafai lau 38 22.09% 1 6.67%
alexey kuznetsov alexey kuznetsov 12 6.98% 2 13.33%
david s. miller david s. miller 10 5.81% 3 20.00%
linus torvalds linus torvalds 7 4.07% 1 6.67%
herbert xu herbert xu 3 1.74% 1 6.67%
simon arlott simon arlott 2 1.16% 1 6.67%
jim paris jim paris 1 0.58% 1 6.67%
hideaki yoshifuji hideaki yoshifuji 1 0.58% 1 6.67%
Total 172 100.00% 15 100.00%



void rt6_mtu_change(struct net_device *dev, unsigned int mtu)
{
	struct rt6_mtu_change_arg arg = {
		.dev = dev,
		.mtu = mtu,
        };

	fib6_clean_all(dev_net(dev), rt6_mtu_change_route, &arg);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 31 72.09% 3 42.86%
thomas graf thomas graf 6 13.95% 1 14.29%
hideaki yoshifuji hideaki yoshifuji 3 6.98% 1 14.29%
daniel lezcano daniel lezcano 2 4.65% 1 14.29%
eric dumazet eric dumazet 1 2.33% 1 14.29%
Total 43 100.00% 7 100.00%


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 },
	[RTA_MULTIPATH]		= { .len = sizeof(struct rtnexthop) },
	[RTA_PREF]              = { .type = NLA_U8 },
	[RTA_ENCAP_TYPE]	= { .type = NLA_U16 },
	[RTA_ENCAP]		= { .type = NLA_NESTED },
	[RTA_EXPIRES]		= { .type = NLA_U32 },
};



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];
	unsigned int pref;
	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;
	cfg->fc_type = rtm->rtm_type;

	if (rtm->rtm_type == RTN_UNREACHABLE ||
	    rtm->rtm_type == RTN_BLACKHOLE ||
	    rtm->rtm_type == RTN_PROHIBIT ||
	    rtm->rtm_type == RTN_THROW)
		cfg->fc_flags |= RTF_REJECT;

	if (rtm->rtm_type == RTN_LOCAL)
		cfg->fc_flags |= RTF_LOCAL;

	if (rtm->rtm_flags & RTM_F_CLONED)
		cfg->fc_flags |= RTF_CACHE;

	cfg->fc_nlinfo.portid = NETLINK_CB(skb).portid;
	cfg->fc_nlinfo.nlh = nlh;
	cfg->fc_nlinfo.nl_net = sock_net(skb->sk);

	if (tb[RTA_GATEWAY]) {
		cfg->fc_gateway = nla_get_in6_addr(tb[RTA_GATEWAY]);
		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_PREFSRC])
		cfg->fc_prefsrc = nla_get_in6_addr(tb[RTA_PREFSRC]);

	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]);

	if (tb[RTA_MULTIPATH]) {
		cfg->fc_mp = nla_data(tb[RTA_MULTIPATH]);
		cfg->fc_mp_len = nla_len(tb[RTA_MULTIPATH]);
	}

	if (tb[RTA_PREF]) {
		pref = nla_get_u8(tb[RTA_PREF]);
		if (pref != ICMPV6_ROUTER_PREF_LOW &&
		    pref != ICMPV6_ROUTER_PREF_HIGH)
			pref = ICMPV6_ROUTER_PREF_MEDIUM;
		cfg->fc_flags |= RTF_PREF(pref);
	}

	if (tb[RTA_ENCAP])
		cfg->fc_encap = tb[RTA_ENCAP];

	if (tb[RTA_ENCAP_TYPE])
		cfg->fc_encap_type = nla_get_u16(tb[RTA_ENCAP_TYPE]);

	if (tb[RTA_EXPIRES]) {
		unsigned long timeout = addrconf_timeout_fixup(nla_get_u32(tb[RTA_EXPIRES]), HZ);

		if (addrconf_finite_timeout(timeout)) {
			cfg->fc_expires = jiffies_to_clock_t(timeout * HZ);
			cfg->fc_flags |= RTF_EXPIRES;
		}
	}

	err = 0;
errout:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 234 36.17% 1 5.88%
pre-git pre-git 156 24.11% 3 17.65%
nicolas dichtel nicolas dichtel 59 9.12% 3 17.65%
lucien xin lucien xin 52 8.04% 1 5.88%
lubomir rintel lubomir rintel 46 7.11% 1 5.88%
roopa prabhu roopa prabhu 35 5.41% 1 5.88%
daniel walter daniel walter 16 2.47% 1 5.88%
maciej zenczykowski maciej zenczykowski 14 2.16% 1 5.88%
martin kafai lau martin kafai lau 14 2.16% 1 5.88%
benjamin thery benjamin thery 10 1.55% 1 5.88%
jiri benc jiri benc 6 0.93% 1 5.88%
hideaki yoshifuji hideaki yoshifuji 3 0.46% 1 5.88%
eric w. biederman eric w. biederman 2 0.31% 1 5.88%
Total 647 100.00% 17 100.00%


struct rt6_nh {
	
struct rt6_info *rt6_info;
	
struct fib6_config r_cfg;
	
struct mx6_config mxc;
	
struct list_head next;
};



static void ip6_print_replace_route_err(struct list_head *rt6_nh_list)
{
	struct rt6_nh *nh;

	list_for_each_entry(nh, rt6_nh_list, next) {
		pr_warn("IPV6: multipath route replace failed (check consistency of installed routes): %pI6 nexthop %pI6 ifi %d\n",
		        &nh->r_cfg.fc_dst, &nh->r_cfg.fc_gateway,
		        nh->r_cfg.fc_ifindex);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 35 68.63% 1 50.00%
nicolas dichtel nicolas dichtel 16 31.37% 1 50.00%
Total 51 100.00% 2 100.00%



static int ip6_route_info_append(struct list_head *rt6_nh_list,
				 struct rt6_info *rt, struct fib6_config *r_cfg)
{
	struct rt6_nh *nh;
	struct rt6_info *rtnh;
	int err = -EEXIST;

	list_for_each_entry(nh, rt6_nh_list, next) {
		/* check if rt6_info already exists */
		rtnh = nh->rt6_info;

		if (rtnh->dst.dev == rt->dst.dev &&
		    rtnh->rt6i_idev == rt->rt6i_idev &&
		    ipv6_addr_equal(&rtnh->rt6i_gateway,
				    &rt->rt6i_gateway))
			return err;
	}

	nh = kzalloc(sizeof(*nh), GFP_KERNEL);
	if (!nh)
		return -ENOMEM;
	nh->rt6_info = rt;
	err = ip6_convert_metrics(&nh->mxc, r_cfg);
	if (err) {
		kfree(nh);
		return err;
	}
	memcpy(&nh->r_cfg, r_cfg, sizeof(*r_cfg));
	list_add_tail(&nh->next, rt6_nh_list);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 175 100.00% 1 100.00%
Total 175 100.00% 1 100.00%



static int ip6_route_multipath_add(struct fib6_config *cfg)
{
	struct fib6_config r_cfg;
	struct rtnexthop *rtnh;
	struct rt6_info *rt;
	struct rt6_nh *err_nh;
	struct rt6_nh *nh, *nh_safe;
	int remaining;
	int attrlen;
	int err = 1;
	int nhn = 0;
	int replace = (cfg->fc_nlinfo.nlh &&
		       (cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_REPLACE));
	LIST_HEAD(rt6_nh_list);

	remaining = cfg->fc_mp_len;
	rtnh = (struct rtnexthop *)cfg->fc_mp;

	/* Parse a Multipath Entry and build a list (rt6_nh_list) of
         * rt6_info structs per nexthop
         */
	while (rtnh_ok(rtnh, remaining)) {
		memcpy(&r_cfg, cfg, sizeof(*cfg));
		if (rtnh->rtnh_ifindex)
			r_cfg.fc_ifindex = rtnh->rtnh_ifindex;

		attrlen = rtnh_attrlen(rtnh);
		if (attrlen > 0) {
			struct nlattr *nla, *attrs = rtnh_attrs(rtnh);

			nla = nla_find(attrs, attrlen, RTA_GATEWAY);
			if (nla) {
				r_cfg.fc_gateway = nla_get_in6_addr(nla);
				r_cfg.fc_flags |= RTF_GATEWAY;
			}
			r_cfg.fc_encap = nla_find(attrs, attrlen, RTA_ENCAP);
			nla = nla_find(attrs, attrlen, RTA_ENCAP_TYPE);
			if (nla)
				r_cfg.fc_encap_type = nla_get_u16(nla);
		}

		rt = ip6_route_info_create(&r_cfg);
		if (IS_ERR(rt)) {
			err = PTR_ERR(rt);
			rt = NULL;
			goto cleanup;
		}

		err = ip6_route_info_append(&rt6_nh_list, rt, &r_cfg);
		if (err) {
			dst_free(&rt->dst);
			goto cleanup;
		}

		rtnh = rtnh_next(rtnh, &remaining);
	}

	err_nh = NULL;
	list_for_each_entry(nh, &rt6_nh_list, next) {
		err = __ip6_ins_rt(nh->rt6_info, &cfg->fc_nlinfo, &nh->mxc);
		/* nh->rt6_info is used or freed at this point, reset to NULL*/
		nh->rt6_info = NULL;
		if (err) {
			if (replace && nhn)
				ip6_print_replace_route_err(&rt6_nh_list);
			err_nh = nh;
			goto add_errout;
		}

		/* Because each route is added like a single route we remove
                 * these flags after the first nexthop: if there is a collision,
                 * we have already failed to add the first nexthop:
                 * fib6_add_rt2node() has rejected it; when replacing, old
                 * nexthops have been replaced by first new, the rest should
                 * be added to it.
                 */
		cfg->fc_nlinfo.nlh->nlmsg_flags &= ~(NLM_F_EXCL |
						     NLM_F_REPLACE);
		nhn++;
	}

	goto cleanup;

add_errout:
	/* Delete routes that were already added */
	list_for_each_entry(nh, &rt6_nh_list, next) {
		if (err_nh == nh)
			break;
		ip6_route_del(&nh->r_cfg);
	}

cleanup:
	list_for_each_entry_safe(nh, nh_safe, &rt6_nh_list, next) {
		if (nh->rt6_info)
			dst_free(&nh->rt6_info->dst);
		kfree(nh->mxc.mx);
		list_del(&nh->next);
		kfree(nh);
	}

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 460 96.44% 2 50.00%
nicolas dichtel nicolas dichtel 16 3.35% 1 25.00%
jiri benc jiri benc 1 0.21% 1 25.00%
Total 477 100.00% 4 100.00%



static int ip6_route_multipath_del(struct fib6_config *cfg)
{
	struct fib6_config r_cfg;
	struct rtnexthop *rtnh;
	int remaining;
	int attrlen;
	int err = 1, last_err = 0;

	remaining = cfg->fc_mp_len;
	rtnh = (struct rtnexthop *)cfg->fc_mp;

	/* Parse a Multipath Entry */
	while (rtnh_ok(rtnh, remaining)) {
		memcpy(&r_cfg, cfg, sizeof(*cfg));
		if (rtnh->rtnh_ifindex)
			r_cfg.fc_ifindex = rtnh->rtnh_ifindex;

		attrlen = rtnh_attrlen(rtnh);
		if (attrlen > 0) {
			struct nlattr *nla, *attrs = rtnh_attrs(rtnh);

			nla = nla_find(attrs, attrlen, RTA_GATEWAY);
			if (nla) {
				nla_memcpy(&r_cfg.fc_gateway, nla, 16);
				r_cfg.fc_flags |= RTF_GATEWAY;
			}
		}
		err = ip6_route_del(&r_cfg);
		if (err)
			last_err = err;

		rtnh = rtnh_next(rtnh, &remaining);
	}

	return last_err;
}

Contributors
Person Tokens Prop Commits CommitProp
roopa prabhu roopa prabhu 152 82.61% 2 66.67%
nicolas dichtel nicolas dichtel 32 17.39% 1 33.33%
Total 184 100.00% 3 100.00%



static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct fib6_config cfg;
	int err;

	err = rtm_to_fib6_config(skb, nlh, &cfg);
	if (err < 0)
		return err;

	if (cfg.fc_mp)
		return ip6_route_multipath_del(&cfg);
	else
		return ip6_route_del(&cfg);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 31 47.69% 2 28.57%
thomas graf thomas graf 19 29.23% 2 28.57%
nicolas dichtel nicolas dichtel 13 20.00% 1 14.29%
patrick mchardy patrick mchardy 1 1.54% 1 14.29%
roopa prabhu roopa prabhu 1 1.54% 1 14.29%
Total 65 100.00% 7 100.00%



static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh)
{
	struct fib6_config cfg;
	int err;

	err = rtm_to_fib6_config(skb, nlh, &cfg);
	if (err < 0)
		return err;

	if (cfg.fc_mp)
		return ip6_route_multipath_add(&cfg);
	else
		return ip6_route_add(&cfg);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 31 47.69% 3 37.50%
thomas graf thomas graf 19 29.23% 2 25.00%
nicolas dichtel nicolas dichtel 13 20.00% 1 12.50%
patrick mchardy patrick mchardy 1 1.54% 1 12.50%
roopa prabhu roopa prabhu 1 1.54% 1 12.50%
Total 65 100.00% 8 100.00%



static inline size_t rt6_nlmsg_size(struct rt6_info *rt)
{
	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))
	       + nla_total_size(TCP_CA_NAME_MAX) /* RTAX_CC_ALGO */
	       + nla_total_size(1) /* RTA_PREF */
	       + lwtunnel_get_encap_size(rt->dst.lwtstate);
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 74 68.52% 1 16.67%
roopa prabhu roopa prabhu 11 10.19% 1 16.67%
noriaki takamiya noriaki takamiya 8 7.41% 1 16.67%
lubomir rintel lubomir rintel 6 5.56% 1 16.67%
daniel borkmann daniel borkmann 6 5.56% 1 16.67%
jiri benc jiri benc 3 2.78% 1 16.67%
Total 108 100.00% 6 100.00%



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 portid, u32 seq,
			 int prefix, int nowait, unsigned int flags)
{
	u32 metrics[RTAX_MAX];
	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, portid, seq, type, sizeof(*rtm), flags);
	if (!nlh)
		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;
	if (nla_put_u32(skb, RTA_TABLE, table))
		goto nla_put_failure;
	if (rt->rt6i_flags & RTF_REJECT) {
		switch (rt->dst.error) {
		case -EINVAL:
			rtm->rtm_type = RTN_BLACKHOLE;
			break;
		case -EACCES:
			rtm->rtm_type = RTN_PROHIBIT;
			break;
		case -EAGAIN:
			rtm->rtm_type = RTN_THROW;
			break;
		default:
			rtm->rtm_type = RTN_UNREACHABLE;
			break;
		}
	}
	else if (rt->rt6i_flags & RTF_LOCAL)
		rtm->rtm_type = RTN_LOCAL;
	else if (rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK))
		rtm->rtm_type = RTN_LOCAL;
	else
		rtm->rtm_type = RTN_UNICAST;
	rtm->rtm_flags = 0;
	if (!netif_carrier_ok(rt->dst.dev)) {
		rtm->rtm_flags |= RTNH_F_LINKDOWN;
		if (rt->rt6i_idev->cnf.ignore_routes_with_linkdown)
			rtm->rtm_flags |= RTNH_F_DEAD;
	}
	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) {
		if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ROUTEINFO))
			rtm->rtm_protocol = RTPROT_RA;
		else
			rtm->rtm_protocol = RTPROT_KERNEL;
	}

	if (rt->rt6i_flags & RTF_CACHE)
		rtm->rtm_flags |= RTM_F_CLONED;

	if (dst) {
		if (nla_put_in6_addr(skb, RTA_DST, dst))
			goto nla_put_failure;
		rtm->rtm_dst_len = 128;
	} else if (rtm->rtm_dst_len)
		if (nla_put_in6_addr(skb, RTA_DST, &rt->rt6i_dst.addr))
			goto nla_put_failure;
#ifdef CONFIG_IPV6_SUBTREES
	if (src) {
		if (nla_put_in6_addr(skb, RTA_SRC, src))
			goto nla_put_failure;
		rtm->rtm_src_len = 128;
	} else if (rtm->rtm_src_len &&
		   nla_put_in6_addr(skb, RTA_SRC, &rt->rt6i_src.addr))
		goto nla_put_failure;
#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,
						  portid);

			if (err <= 0) {
				if (!nowait) {
					if (err == 0)
						return 0;
					goto nla_put_failure;
				} else {
					if (err == -EMSGSIZE)
						goto nla_put_failure;
				}
			}
		} else
#endif
			if (nla_put_u32(skb, RTA_IIF, iif))
				goto nla_put_failure;
	} else if (dst) {
		struct in6_addr saddr_buf;
		if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0 &&
		    nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf))
			goto nla_put_failure;
	}

	if (rt->rt6i_prefsrc.plen) {
		struct in6_addr saddr_buf;
		saddr_buf = rt->rt6i_prefsrc.addr;
		if (nla_put_in6_addr(skb, RTA_PREFSRC, &saddr_buf))
			goto nla_put_failure;
	}

	memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics));
	if (rt->rt6i_pmtu)
		metrics[RTAX_MTU - 1] = rt->rt6i_pmtu;
	if (rtnetlink_put_metrics(skb, metrics) < 0)
		goto nla_put_failure;

	if (rt->rt6i_flags & RTF_GATEWAY) {
		if (nla_put_in6_addr(skb, RTA_GATEWAY, &rt->rt6i_gateway) < 0)
			goto nla_put_failure;
	}

	if (rt->dst.dev &&
	    nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex))
		goto nla_put_failure;
	if (nla_put_u32(skb, RTA_PRIORITY, rt->rt6i_metric))
		goto nla_put_failure;

	expires = (rt->rt6i_flags & RTF_EXPIRES) ? rt->dst.expires - jiffies : 0;

	if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, rt->dst.error) < 0)
		goto nla_put_failure;

	if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt->rt6i_flags)))
		goto nla_put_failure;

	lwtunnel_fill_encap(skb, rt->dst.lwtstate);

	nlmsg_end(skb, nlh);
	return 0;

nla_put_failure:
	nlmsg_cancel(skb, nlh);
	return -EMSGSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 398 42.39% 6 13.33%
hideaki yoshifuji hideaki yoshifuji 94 10.01% 5 11.11%
david s. miller david s. miller 79 8.41% 4 8.89%
thomas graf thomas graf 54 5.75% 3 6.67%
nicolas dichtel nicolas dichtel 47 5.01% 2 4.44%
martin kafai lau martin kafai lau 39 4.15% 1 2.22%
andy gospodarek andy gospodarek 36 3.83% 2 4.44%
daniel walter daniel walter 29 3.09% 1 2.22%
krishna kumar krishna kumar 24 2.56% 1 2.22%
patrick mchardy patrick mchardy 22 2.34% 2 4.44%
lubomir rintel lubomir rintel 19 2.02% 1 2.22%
maciej zenczykowski maciej zenczykowski 15 1.60% 1 2.22%
brian haley brian haley 13 1.38% 2 4.44%
denis ovsienko denis ovsienko 13 1.38% 1 2.22%
eric dumazet eric dumazet 12 1.28% 2 4.44%
jiri benc jiri benc 10 1.06% 2 4.44%
roopa prabhu roopa prabhu 8 0.85% 1 2.22%
mathew richardson mathew richardson 6 0.64% 1 2.22%
jamal hadi salim jamal hadi salim 6 0.64% 1 2.22%
li wei li wei 5 0.53% 1 2.22%
johannes berg johannes berg 3 0.32% 1 2.22%
benjamin thery benjamin thery 2 0.21% 1 2.22%
eric w. biederman eric w. biederman 2 0.21% 1 2.22%
nikolay aleksandrov nikolay aleksandrov 2 0.21% 1 2.22%
alexey dobriyan alexey dobriyan 1 0.11% 1 2.22%
Total 939 100.00% 45 100.00%



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).portid, arg->cb->nlh->nlmsg_seq,
		     prefix, 0, NLM_F_MULTI);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 62 49.21% 3 27.27%
krishna kumar krishna kumar 29 23.02% 1 9.09%
ville nuorvala ville nuorvala 21 16.67% 1 9.09%
thomas graf thomas graf 4 3.17% 1 9.09%
brian haley brian haley 4 3.17% 1 9.09%
hideaki yoshifuji hideaki yoshifuji 2 1.59% 1 9.09%
jamal hadi salim jamal hadi salim 2 1.59% 1 9.09%
eric w. biederman eric w. biederman 1 0.79% 1 9.09%
mathew richardson mathew richardson 1 0.79% 1 9.09%
Total 126 100.00% 11 100.00%



static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh)
{
	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 flowi6 fl6;
	int err, iif = 0, oif = 0;

	err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
	if (err < 0)
		goto errout;

	err = -EINVAL;
	memset(&fl6, 0, sizeof(fl6));
	rtm = nlmsg_data(nlh);
	fl6.flowlabel = ip6_make_flowinfo(rtm->rtm_tos, 0);

	if (tb[RTA_SRC]) {
		if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr))
			goto errout;

		fl6.saddr = *(struct in6_addr *)nla_data(tb[RTA_SRC]);
	}

	if (tb[RTA_DST]) {
		if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr))
			goto errout;

		fl6.daddr = *(struct in6_addr *)nla_data(tb[RTA_DST]);
	}

	if (tb[RTA_IIF])
		iif = nla_get_u32(tb[RTA_IIF]);

	if (tb[RTA_OIF])
		oif = nla_get_u32(tb[RTA_OIF]);

	if (tb[RTA_MARK])
		fl6.flowi6_mark = nla_get_u32(tb[RTA_MARK]);

	if (iif) {
		struct net_device *dev;
		int flags = 0;

		dev = __dev_get_by_index(net, iif);
		if (!dev) {
			err = -ENODEV;
			goto errout;
		}

		fl6.flowi6_iif = iif;

		if (!ipv6_addr_any(&fl6.saddr))
			flags |= RT6_LOOKUP_F_HAS_SADDR;

		rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6,
							       flags);
	} else {
		fl6.flowi6_oif = oif;

		if (netif_index_is_l3_master(net, oif)) {
			fl6.flowi6_flags = FLOWI_FLAG_L3MDEV_SRC |
					   FLOWI_FLAG_SKIP_NH_OIF;
		}

		rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6);
	}

	skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!skb) {
		ip6_rt_put(rt);
		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));

	skb_dst_set(skb, &rt->dst);

	err = rt6_fill_node(net, skb, rt, &fl6.daddr, &fl6.saddr, iif,
			    RTM_NEWROUTE, NETLINK_CB(in_skb).portid,
			    nlh->nlmsg_seq, 0, 0, 0);
	if (err < 0) {
		kfree_skb(skb);
		goto errout;
	}

	err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
errout:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 169 31.24% 4 12.50%
thomas graf thomas graf 145 26.80% 3 9.38%
shmulik ladkani shmulik ladkani 80 14.79% 2 6.25%
david s. miller david s. miller 24 4.44% 4 12.50%
hannes frederic sowa hannes frederic sowa 20 3.70% 1 3.12%
david ahern david ahern 19 3.51% 1 3.12%
lorenzo colitti lorenzo colitti 19 3.51% 1 3.12%
james morris james morris 17 3.14% 1 3.12%
alexey dobriyan alexey dobriyan 14 2.59% 1 3.12%
denis v. lunev denis v. lunev 10 1.85% 2 6.25%
hideaki yoshifuji hideaki yoshifuji 5 0.92% 2 6.25%
eric dumazet eric dumazet 4 0.74% 1 3.12%
eric w. biederman eric w. biederman 3 0.55% 2 6.25%
arnaldo carvalho de melo arnaldo carvalho de melo 3 0.55% 1 3.12%
jamal hadi salim jamal hadi salim 2 0.37% 1 3.12%
brian haley brian haley 2 0.37% 1 3.12%
daniel lezcano daniel lezcano 2 0.37% 1 3.12%
mathew richardson mathew richardson 1 0.18% 1 3.12%
krishna kumar krishna kumar 1 0.18% 1 3.12%
americo wang americo wang 1 0.18% 1 3.12%
Total 541 100.00% 32 100.00%



void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info,
		     unsigned int nlm_flags)
{
	struct sk_buff *skb;
	struct net *net = info->nl_net;
	u32 seq;
	int err;

	err = -ENOBUFS;
	seq = info->nlh ? info->nlh->nlmsg_seq : 0;

	skb = nlmsg_new(rt6_nlmsg_size(rt), gfp_any());
	if (!skb)
		goto errout;

	err = rt6_fill_node(net, skb, rt, NULL, NULL, 0,
				event, info->portid, seq, 0, 0, nlm_flags);
	if (err < 0) {
		/* -EMSGSIZE implies BUG in rt6_nlmsg_size() */
		WARN_ON(err == -EMSGSIZE);
		kfree_skb(skb);
		goto errout;
	}
	rtnl_notify(skb, net, info->portid, RTNLGRP_IPV6_ROUTE,
		    info->nlh, gfp_any());
	return;
errout:
	if (err < 0)
		rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err);
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 57 32.39% 5 20.83%
thomas graf thomas graf 45 25.57% 3 12.50%
patrick mchardy patrick mchardy 21 11.93% 2 8.33%
denis v. lunev denis v. lunev 16 9.09% 2 8.33%
daniel lezcano daniel lezcano 11 6.25% 1 4.17%
roopa prabhu roopa prabhu 8 4.55% 2 8.33%
jamal hadi salim jamal hadi salim 6 3.41% 2 8.33%
mathew richardson mathew richardson 3 1.70% 1 4.17%
brian haley brian haley 2 1.14% 1 4.17%
krishna kumar krishna kumar 2 1.14% 1 4.17%
eric w. biederman eric w. biederman 2 1.14% 1 4.17%
david s. miller david s. miller 1 0.57% 1 4.17%
hideaki yoshifuji hideaki yoshifuji 1 0.57% 1 4.17%
pablo neira ayuso pablo neira ayuso 1 0.57% 1 4.17%
Total 176 100.00% 24 100.00%



static int ip6_route_dev_notify(struct notifier_block *this,
				unsigned long event, void *ptr)
{
	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
	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;
}

Contributors
Person Tokens Prop Commits CommitProp
daniel lezcano daniel lezcano 130 94.20% 1 33.33%
jiri pirko jiri pirko 5 3.62% 1 33.33%
hideaki yoshifuji hideaki yoshifuji 3 2.17% 1 33.33%
Total 138 100.00% 3 100.00%

/*
 *      /proc
 */

#ifdef CONFIG_PROC_FS


static const struct file_operations ipv6_route_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= ipv6_route_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= seq_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,
		   dst_entries_get_slow(&net->ipv6.ip6_dst_ops),
		   net->ipv6.rt6_stats->fib_discarded_routes);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 33 34.02% 3 30.00%
daniel lezcano daniel lezcano 32 32.99% 2 20.00%
benjamin thery benjamin thery 16 16.49% 2 20.00%
randy dunlap randy dunlap 15 15.46% 2 20.00%
eric dumazet eric dumazet 1 1.03% 1 10.00%
Total 97 100.00% 10 100.00%



static int rt6_stats_seq_open(struct inode *inode, struct file *file)
{
	return single_open_net(inode, file, rt6_stats_seq_show);
}

Contributors
Person Tokens Prop Commits CommitProp
randy dunlap randy dunlap 19 73.08% 1 20.00%
pavel emelianov pavel emelianov 4 15.38% 2 40.00%
daniel lezcano daniel lezcano 2 7.69% 1 20.00%
pre-git pre-git 1 3.85% 1 20.00%
Total 26 100.00% 5 100.00%


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(struct ctl_table *ctl, int write,
			      void __user *buffer, size_t *lenp, loff_t *ppos)
{
	struct net *net;
	int delay;
	if (!write)
		return -EINVAL;

	net = (struct net *)ctl->extra1;
	delay = net->ipv6.sysctl.flush_delay;
	proc_dointvec(ctl, write, buffer, lenp, ppos);
	fib6_run_gc(delay <= 0 ? 0 : (unsigned long)delay, net, delay > 0);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 43 42.16% 1 11.11%
lucian adrian grijincu lucian adrian grijincu 24 23.53% 1 11.11%
daniel lezcano daniel lezcano 18 17.65% 2 22.22%
linus torvalds linus torvalds 6 5.88% 1 11.11%
michal kubecek michal kubecek 5 4.90% 1 11.11%
hideaki yoshifuji hideaki yoshifuji 4 3.92% 1 11.11%
joe perches joe perches 1 0.98% 1 11.11%
al viro al viro 1 0.98% 1 11.11%
Total 102 100.00% 9 100.00%


struct 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[0].extra1 = net;
		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;

		/* Don't export sysctls to unprivileged users */
		if (net->user_ns != &init_user_ns)
			table[0].procname = NULL;
	}

	return table;
}
Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 134 58.52% 1 11.11%
daniel lezcano daniel lezcano 45 19.65% 2 22.22%
eric w. biederman eric w. biederman 19 8.30% 1 11.11%
alexey dobriyan alexey dobriyan 18 7.86% 3 33.33%
lucian adrian grijincu lucian adrian grijincu 9 3.93% 1 11.11%
benjamin thery benjamin thery 4 1.75% 1 11.11%
Total 229 100.00% 9 100.00%

#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));

	if (dst_entries_init(&net->ipv6.ip6_dst_ops) < 0)
		goto out_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_entries;
	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;
	dst_init_metrics(&net->ipv6.ip6_null_entry->dst,
			 ip6_template_metrics, true);

#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;
	dst_init_metrics(&net->ipv6.ip6_prohibit_entry->dst,
			 ip6_template_metrics, true);

	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;
	dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst,
			 ip6_template_metrics, true);
#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;

	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_entries:
	dst_entries_destroy(&net->ipv6.ip6_dst_ops);
out_ip6_dst_ops:
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
daniel lezcano daniel lezcano 234 47.85% 4 26.67%
peter zijlstra peter zijlstra 123 25.15% 2 13.33%
david s. miller david s. miller 48 9.82% 2 13.33%
benjamin thery benjamin thery 44 9.00% 2 13.33%
eric dumazet eric dumazet 30 6.13% 1 6.67%
alexey dobriyan alexey dobriyan 8 1.64% 2 13.33%
denis v. lunev denis v. lunev 1 0.20% 1 6.67%
pavel emelianov pavel emelianov 1 0.20% 1 6.67%
Total 489 100.00% 15 100.00%



static void __net_exit ip6_route_net_exit(struct net *net)
{
	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
	dst_entries_destroy(&net->ipv6.ip6_dst_ops);
}

Contributors
Person Tokens Prop Commits CommitProp
daniel lezcano daniel lezcano 43 79.63% 1 33.33%
xiaotian feng xiaotian feng 10 18.52% 1 33.33%
alexey dobriyan alexey dobriyan 1 1.85% 1 33.33%
Total 54 100.00% 3 100.00%



static int __net_init ip6_route_net_init_late(struct net *net)
{
#ifdef CONFIG_PROC_FS
	proc_create("ipv6_route", 0, net->proc_net, &ipv6_route_proc_fops);
	proc_create("rt6_stats", S_IRUGO, net->proc_net, &rt6_stats_seq_fops);
#endif
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 38 79.17% 1 50.00%
gao feng gao feng 10 20.83% 1 50.00%
Total 48 100.00% 2 100.00%



static void __net_exit ip6_route_net_exit_late(struct net *net)
{
#ifdef CONFIG_PROC_FS
	remove_proc_entry("ipv6_route", net->proc_net);
	remove_proc_entry("rt6_stats", net->proc_net);
#endif
}

Contributors
Person Tokens Prop Commits CommitProp
thomas graf thomas graf 25 71.43% 1 50.00%
gao feng gao feng 10 28.57% 1 50.00%
Total 35 100.00% 2 100.00%


static struct pernet_operations ip6_route_net_ops = {
	.init = ip6_route_net_init,
	.exit = ip6_route_net_exit,
};



static int __net_init ipv6_inetpeer_init(struct net *net)
{
	struct inet_peer_base *bp = kmalloc(sizeof(*bp), GFP_KERNEL);

	if (!bp)
		return -ENOMEM;
	inet_peer_base_init(bp);
	net->ipv6.peers = bp;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%



static void __net_exit ipv6_inetpeer_exit(struct net *net)
{
	struct inet_peer_base *bp = net->ipv6.peers;

	net->ipv6.peers = NULL;
	inetpeer_invalidate_tree(bp);
	kfree(bp);
}

Contributors
Person Tokens Prop Commits CommitProp
david s. miller david s. miller 41 100.00% 2 100.00%
Total 41 100.00% 2 100.00%


static struct pernet_operations ipv6_inetpeer_ops = {
	.init	=	ipv6_inetpeer_init,
	.exit	=	ipv6_inetpeer_exit,
};


static struct pernet_operations ip6_route_net_late_ops = {
	.init = ip6_route_net_init_late,
	.exit = ip6_route_net_exit_late,
};


static struct notifier_block ip6_route_dev_notifier = {
	.notifier_call = ip6_route_dev_notify,
	.priority = 0,
};



int __init ip6_route_init(void)
{
	int ret;
	int cpu;

	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 = dst_entries_init(&ip6_dst_blackhole_ops);
	if (ret)
		goto out_kmem_cache;

	ret = register_pernet_subsys(&ipv6_inetpeer_ops);
	if (ret)
		goto out_dst_entries;

	ret = register_pernet_subsys(&ip6_route_net_ops);
	if (ret)
		goto out_register_inetpeer;

	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 = register_pernet_subsys(&ip6_route_net_late_ops);
	if (ret)
		goto fib6_rules_init;

	ret = -ENOBUFS;
	if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, NULL) ||
	    __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, NULL) ||
	    __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL, NULL))
		goto out_register_late_subsys;

	ret = register_netdevice_notifier(&ip6_route_dev_notifier);
	if (ret)
		goto out_register_late_subsys;

	for_each_possible_cpu(cpu) {
		struct uncached_list *ul = per_cpu_ptr(&rt6_uncached_list, cpu);

		INIT_LIST_HEAD(&ul->head);
		spin_lock_init(&ul->lock);
	}

out:
	return ret;

out_register_late_subsys:
	unregister_pernet_subsys(&ip6_route_net_late_ops);
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_register_inetpeer:
	unregister_pernet_subsys(&ipv6_inetpeer_ops);
out_dst_entries:
	dst_entries_destroy(&ip6_dst_blackhole_ops);
out_kmem_cache:
	kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep);
	goto out;
}

Contributors
Person Tokens Prop Commits CommitProp
daniel lezcano daniel lezcano 212 51.71% 6 27.27%
thomas graf thomas graf 59 14.39% 3 13.64%
martin kafai lau martin kafai lau 38 9.27% 1 4.55%
david s. miller david s. miller 29 7.07% 3 13.64%
pre-git pre-git 29 7.07% 4 18.18%
eric dumazet eric dumazet 23 5.61% 1 4.55%
arnaud ebalard arnaud ebalard 8 1.95% 1 4.55%
greg rose greg rose 6 1.46% 1 4.55%
benjamin thery benjamin thery 3 0.73% 1 4.55%
hideaki yoshifuji hideaki yoshifuji 3 0.73% 1 4.55%
Total 410 100.00% 22 100.00%



void ip6_route_cleanup(void)
{
	unregister_netdevice_notifier(&ip6_route_dev_notifier);
	unregister_pernet_subsys(&ip6_route_net_late_ops);
	fib6_rules_cleanup();
	xfrm6_fini();
	fib6_gc_cleanup();
	unregister_pernet_subsys(&ipv6_inetpeer_ops);
	unregister_pernet_subsys(&ip6_route_net_ops);
	dst_entries_destroy(&ip6_dst_blackhole_ops);
	kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep);
}
Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 13 24.53% 4 28.57%
daniel lezcano daniel lezcano 11 20.75% 2 14.29%
david s. miller david s. miller 6 11.32% 1 7.14%
thomas graf thomas graf 6 11.32% 1 7.14%
xiaotian feng xiaotian feng 6 11.32% 1 7.14%
daniel mcneil daniel mcneil 5 9.43% 1 7.14%
hideaki yoshifuji hideaki yoshifuji 2 3.77% 1 7.14%
benjamin thery benjamin thery 2 3.77% 1 7.14%
kazunori miyazawa kazunori miyazawa 1 1.89% 1 7.14%
eric w. biederman eric w. biederman 1 1.89% 1 7.14%
Total 53 100.00% 14 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
pre-git pre-git 3205 16.33% 26 5.65%
david s. miller david s. miller 2354 12.00% 50 10.87%
hideaki yoshifuji hideaki yoshifuji 2311 11.78% 84 18.26%
martin kafai lau martin kafai lau 2293 11.69% 23 5.00%
thomas graf thomas graf 1806 9.20% 18 3.91%
daniel lezcano daniel lezcano 1269 6.47% 21 4.57%
roopa prabhu roopa prabhu 1091 5.56% 5 1.09%
duan jiong duan jiong 559 2.85% 4 0.87%
nicolas dichtel nicolas dichtel 487 2.48% 9 1.96%
david ahern david ahern 369 1.88% 8 1.74%
daniel walter daniel walter 304 1.55% 1 0.22%
hannes frederic sowa hannes frederic sowa 294 1.50% 8 1.74%
florian westphal florian westphal 269 1.37% 6 1.30%
eric dumazet eric dumazet 216 1.10% 14 3.04%
shmulik ladkani shmulik ladkani 143 0.73% 2 0.43%
steffen klassert steffen klassert 143 0.73% 5 1.09%
benjamin thery benjamin thery 136 0.69% 6 1.30%
gao feng gao feng 127 0.65% 5 1.09%
peter zijlstra peter zijlstra 123 0.63% 2 0.43%
daniel borkmann daniel borkmann 114 0.58% 4 0.87%
jiri benc jiri benc 110 0.56% 7 1.52%
alexey kuznetsov alexey kuznetsov 101 0.51% 3 0.65%
alexey dobriyan alexey dobriyan 91 0.46% 5 1.09%
lubomir rintel lubomir rintel 82 0.42% 1 0.22%
denis v. lunev denis v. lunev 80 0.41% 7 1.52%
eric w. biederman eric w. biederman 77 0.39% 9 1.96%
andy gospodarek andy gospodarek 75 0.38% 2 0.43%
kamala r kamala r 73 0.37% 1 0.22%
patrick mchardy patrick mchardy 71 0.36% 7 1.52%
randy dunlap randy dunlap 68 0.35% 4 0.87%
lucien xin lucien xin 63 0.32% 1 0.22%
shirley ma shirley ma 61 0.31% 3 0.65%
matti vaittinen matti vaittinen 60 0.31% 1 0.22%
krishna kumar krishna kumar 60 0.31% 2 0.43%
maciej zenczykowski maciej zenczykowski 55 0.28% 1 0.22%
pavel emelianov pavel emelianov 48 0.24% 7 1.52%
lorenzo colitti lorenzo colitti 47 0.24% 3 0.65%
al viro al viro 47 0.24% 3 0.65%
tom herbert tom herbert 47 0.24% 3 0.65%
james morris james morris 42 0.21% 3 0.65%
zheng yan zheng yan 39 0.20% 1 0.22%
vincent bernat vincent bernat 39 0.20% 1 0.22%
herbert xu herbert xu 33 0.17% 6 1.30%
lucian adrian grijincu lucian adrian grijincu 33 0.17% 1 0.22%
ville nuorvala ville nuorvala 31 0.16% 2 0.43%
mathew richardson mathew richardson 30 0.15% 1 0.22%
tom tucker tom tucker 29 0.15% 1 0.22%
brian haley brian haley 28 0.14% 4 0.87%
julian anastasov julian anastasov 27 0.14% 2 0.43%
paolo abeni paolo abeni 21 0.11% 3 0.65%
jamal hadi salim jamal hadi salim 20 0.10% 2 0.43%
lv liangying lv liangying 20 0.10% 1 0.22%
roland dreier roland dreier 17 0.09% 1 0.22%
xiaotian feng xiaotian feng 16 0.08% 1 0.22%
stephen hemminger stephen hemminger 16 0.08% 2 0.43%
jean-mickael guerin jean-mickael guerin 15 0.08% 1 0.22%
nikola forro nikola forro 14 0.07% 1 0.22%
alexander aring alexander aring 14 0.07% 1 0.22%
linus torvalds linus torvalds 13 0.07% 2 0.43%
denis ovsienko denis ovsienko 13 0.07% 1 0.22%
michal kubecek michal kubecek 13 0.07% 3 0.65%
arnaldo carvalho de melo arnaldo carvalho de melo 13 0.07% 4 0.87%
joe perches joe perches 12 0.06% 3 0.65%
li rongqing li rongqing 10 0.05% 4 0.87%
paul marks paul marks 10 0.05% 1 0.22%
sabrina dubroca sabrina dubroca 10 0.05% 1 0.22%
kazunori miyazawa kazunori miyazawa 10 0.05% 2 0.43%
noriaki takamiya noriaki takamiya 8 0.04% 1 0.22%
arnaud ebalard arnaud ebalard 8 0.04% 1 0.22%
simon horman simon horman 6 0.03% 1 0.22%
greg rose greg rose 6 0.03% 1 0.22%
dave craig dave craig 6 0.03% 1 0.22%
li wei li wei 5 0.03% 1 0.22%
americo wang americo wang 5 0.03% 1 0.22%
jiri pirko jiri pirko 5 0.03% 1 0.22%
daniel mcneil daniel mcneil 5 0.03% 1 0.22%
david mccullough david mccullough 5 0.03% 1 0.22%
jens rosenboom jens rosenboom 4 0.02% 1 0.22%
held bernhard held bernhard 4 0.02% 1 0.22%
tejun heo tejun heo 3 0.02% 1 0.22%
paul gortmaker paul gortmaker 3 0.02% 1 0.22%
changli gao changli gao 3 0.02% 1 0.22%
adrian bunk adrian bunk 3 0.02% 3 0.65%
matthias schiffer matthias schiffer 3 0.02% 1 0.22%
johannes berg johannes berg 3 0.02% 1 0.22%
min zhang min zhang 2 0.01% 1 0.22%
dave jones dave jones 2 0.01% 2 0.43%
jiri olsa jiri olsa 2 0.01% 1 0.22%
simon arlott simon arlott 2 0.01% 1 0.22%
nikolay aleksandrov nikolay aleksandrov 2 0.01% 1 0.22%
rami rosen rami rosen 2 0.01% 1 0.22%
stephen rothwell stephen rothwell 2 0.01% 1 0.22%
ian morris ian morris 1 0.01% 1 0.22%
pablo neira ayuso pablo neira ayuso 1 0.01% 1 0.22%
jim paris jim paris 1 0.01% 1 0.22%
michael busch michael busch 1 0.01% 1 0.22%
arjan van de ven arjan van de ven 1 0.01% 1 0.22%
Total 19621 100.00% 460 100.00%
  Directory: net/ipv6

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
martin kafai lau	martin kafai lau	65	100.00%	1	100.00%
	Total	65	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.8 net/ipv6/route.c

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