Release 4.15 net/ipv6/ip6mr.c

Directory: net/ipv6
/*
 *      Linux IPv6 multicast routing support for BSD pim6sd
 *      Based on net/ipv4/ipmr.c.
 *
 *      (c) 2004 Mickael Hoerdt, <hoerdt@clarinet.u-strasbg.fr>
 *              LSIIT Laboratory, Strasbourg, France
 *      (c) 2004 Jean-Philippe Andriot, <jean-philippe.andriot@6WIND.com>
 *              6WIND, Paris, France
 *      Copyright (C)2007,2008 USAGI/WIDE Project
 *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
 *
 *      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.
 *
 */

#include <linux/uaccess.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
#include <linux/socket.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/compat.h>
#include <net/protocol.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/raw.h>
#include <linux/notifier.h>
#include <linux/if_arp.h>
#include <net/checksum.h>
#include <net/netlink.h>
#include <net/fib_rules.h>

#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <linux/mroute6.h>
#include <linux/pim.h>
#include <net/addrconf.h>
#include <linux/netfilter_ipv6.h>
#include <linux/export.h>
#include <net/ip6_checksum.h>
#include <linux/netconf.h>


struct mr6_table {
	
struct list_head	list;
	
possible_net_t		net;
	
u32			id;
	
struct sock		*mroute6_sk;
	
struct timer_list	ipmr_expire_timer;
	
struct list_head	mfc6_unres_queue;
	
struct list_head	mfc6_cache_array[MFC6_LINES];
	
struct mif_device	vif6_table[MAXMIFS];
	
int			maxvif;
	
atomic_t		cache_resolve_queue_len;
	
bool			mroute_do_assert;
	
bool			mroute_do_pim;
#ifdef CONFIG_IPV6_PIMSM_V2
	
int			mroute_reg_vif_num;
#endif
};


struct ip6mr_rule {
	
struct fib_rule		common;
};


struct ip6mr_result {
	
struct mr6_table	*mrt;
};

/* Big lock, protecting vif table, mrt cache and mroute socket state.
   Note that the changes are semaphored via rtnl_lock.
 */

static DEFINE_RWLOCK(mrt_lock);

/*
 *      Multicast router control variables
 */


#define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL)

/* Special spinlock for queue of unresolved entries */
static DEFINE_SPINLOCK(mfc_unres_lock);

/* We return to original Alan's scheme. Hash table of resolved
   entries is changed only in process context and protected
   with weak lock mrt_lock. Queue of unresolved entries is protected
   with strong spinlock mfc_unres_lock.

   In this case data path is free of exclusive locks at all.
 */


static struct kmem_cache *mrt_cachep __read_mostly;

static struct mr6_table *ip6mr_new_table(struct net *net, u32 id);
static void ip6mr_free_table(struct mr6_table *mrt);

static void ip6_mr_forward(struct net *net, struct mr6_table *mrt,
			   struct sk_buff *skb, struct mfc6_cache *cache);
static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
			      mifi_t mifi, int assert);
static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
			       struct mfc6_cache *c, struct rtmsg *rtm);
static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc,
			      int cmd);
static void mrt6msg_netlink_event(struct mr6_table *mrt, struct sk_buff *pkt);
static int ip6mr_rtm_dumproute(struct sk_buff *skb,
			       struct netlink_callback *cb);
static void mroute_clean_tables(struct mr6_table *mrt, bool all);
static void ipmr_expire_process(struct timer_list *t);

#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES

#define ip6mr_for_each_table(mrt, net) \
	list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)



static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
{
	struct mr6_table *mrt;

	ip6mr_for_each_table(mrt, net) {
		if (mrt->id == id)
			return mrt;
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 43 100.00% 1 100.00%
Total 43 100.00% 1 100.00%



static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6,
			    struct mr6_table **mrt)
{
	int err;
	struct ip6mr_result res;
	struct fib_lookup_arg arg = {
		.result = &res,
		.flags = FIB_LOOKUP_NOREF,
        };

	err = fib_rules_lookup(net->ipv6.mr6_rules_ops,
			       flowi6_to_flowi(flp6), 0, &arg);
	if (err < 0)
		return err;
	*mrt = res.mrt;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 71 82.56% 1 33.33%
Hannes Frederic Sowa 9 10.47% 1 33.33%
David S. Miller 6 6.98% 1 33.33%
Total 86 100.00% 3 100.00%



static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp,
			     int flags, struct fib_lookup_arg *arg)
{
	struct ip6mr_result *res = arg->result;
	struct mr6_table *mrt;

	switch (rule->action) {
	case FR_ACT_TO_TBL:
		break;
	case FR_ACT_UNREACHABLE:
		return -ENETUNREACH;
	case FR_ACT_PROHIBIT:
		return -EACCES;
	case FR_ACT_BLACKHOLE:
	default:
		return -EINVAL;
	}

	mrt = ip6mr_get_table(rule->fr_net, rule->table);
	if (!mrt)
		return -EAGAIN;
	res->mrt = mrt;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 102 99.03% 1 50.00%
Ian Morris 1 0.97% 1 50.00%
Total 103 100.00% 2 100.00%



static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags)
{
	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%


static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = {
	FRA_GENERIC_POLICY,
};



static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
				struct fib_rule_hdr *frh, struct nlattr **tb)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 30 100.00% 1 100.00%
Total 30 100.00% 1 100.00%



static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
			      struct nlattr **tb)
{
	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
			   struct fib_rule_hdr *frh)
{
	frh->dst_len = 0;
	frh->src_len = 0;
	frh->tos     = 0;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 42 100.00% 1 100.00%
Total 42 100.00% 1 100.00%


static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = {
	.family		= RTNL_FAMILY_IP6MR,
	.rule_size	= sizeof(struct ip6mr_rule),
	.addr_size	= sizeof(struct in6_addr),
	.action		= ip6mr_rule_action,
	.match		= ip6mr_rule_match,
	.configure	= ip6mr_rule_configure,
	.compare	= ip6mr_rule_compare,
	.fill		= ip6mr_rule_fill,
	.nlgroup	= RTNLGRP_IPV6_RULE,
	.policy		= ip6mr_rule_policy,
	.owner		= THIS_MODULE,
};



static int __net_init ip6mr_rules_init(struct net *net)
{
	struct fib_rules_ops *ops;
	struct mr6_table *mrt;
	int err;

	ops = fib_rules_register(&ip6mr_rules_ops_template, net);
	if (IS_ERR(ops))
		return PTR_ERR(ops);

	INIT_LIST_HEAD(&net->ipv6.mr6_tables);

	mrt = ip6mr_new_table(net, RT6_TABLE_DFLT);
	if (!mrt) {
		err = -ENOMEM;
		goto err1;
	}

	err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0);
	if (err < 0)
		goto err2;

	net->ipv6.mr6_rules_ops = ops;
	return 0;

err2:
	ip6mr_free_table(mrt);
err1:
	fib_rules_unregister(ops);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 130 98.48% 1 33.33%
Ian Morris 1 0.76% 1 33.33%
Américo Wang 1 0.76% 1 33.33%
Total 132 100.00% 3 100.00%



static void __net_exit ip6mr_rules_exit(struct net *net)
{
	struct mr6_table *mrt, *next;

	rtnl_lock();
	list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) {
		list_del(&mrt->list);
		ip6mr_free_table(mrt);
	}
	fib_rules_unregister(net->ipv6.mr6_rules_ops);
	rtnl_unlock();
}
Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 44 73.33% 1 25.00%
Eric Dumazet 10 16.67% 1 25.00%
Américo Wang 3 5.00% 1 25.00%
Hannes Frederic Sowa 3 5.00% 1 25.00%
Total 60 100.00% 4 100.00%

#else

#define ip6mr_for_each_table(mrt, net) \
	for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)



static struct mr6_table *ip6mr_get_table(struct net *net, u32 id)
{
	return net->ipv6.mrt6;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 23 100.00% 1 100.00%
Total 23 100.00% 1 100.00%



static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6,
			    struct mr6_table **mrt)
{
	*mrt = net->ipv6.mrt6;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 32 94.12% 1 50.00%
David S. Miller 2 5.88% 1 50.00%
Total 34 100.00% 2 100.00%



static int __net_init ip6mr_rules_init(struct net *net)
{
	net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT);
	return net->ipv6.mrt6 ? 0 : -ENOMEM;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 37 100.00% 1 100.00%
Total 37 100.00% 1 100.00%



static void __net_exit ip6mr_rules_exit(struct net *net)
{
	rtnl_lock();
	ip6mr_free_table(net->ipv6.mrt6);
	net->ipv6.mrt6 = NULL;
	rtnl_unlock();
}
Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 21 60.00% 1 50.00%
Hannes Frederic Sowa 14 40.00% 1 50.00%
Total 35 100.00% 2 100.00%

#endif



static struct mr6_table *ip6mr_new_table(struct net *net, u32 id)
{
	struct mr6_table *mrt;
	unsigned int i;

	mrt = ip6mr_get_table(net, id);
	if (mrt)
		return mrt;

	mrt = kzalloc(sizeof(*mrt), GFP_KERNEL);
	if (!mrt)
		return NULL;
	mrt->id = id;
	write_pnet(&mrt->net, net);

	/* Forwarding cache */
	for (i = 0; i < MFC6_LINES; i++)
		INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]);

	INIT_LIST_HEAD(&mrt->mfc6_unres_queue);

	timer_setup(&mrt->ipmr_expire_timer, ipmr_expire_process, 0);

#ifdef CONFIG_IPV6_PIMSM_V2
	mrt->mroute_reg_vif_num = -1;
#endif
#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
	list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables);
#endif
	return mrt;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 155 98.10% 1 33.33%
Kees Cook 2 1.27% 1 33.33%
Ian Morris 1 0.63% 1 33.33%
Total 158 100.00% 3 100.00%



static void ip6mr_free_table(struct mr6_table *mrt)
{
	del_timer_sync(&mrt->ipmr_expire_timer);
	mroute_clean_tables(mrt, true);
	kfree(mrt);
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 28 90.32% 2 50.00%
Nikolay Aleksandrov 2 6.45% 1 25.00%
Américo Wang 1 3.23% 1 25.00%
Total 31 100.00% 4 100.00%

#ifdef CONFIG_PROC_FS


struct ipmr_mfc_iter {
	
struct seq_net_private p;
	
struct mr6_table *mrt;
	
struct list_head *cache;
	
int ct;
};




static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net,
					   struct ipmr_mfc_iter *it, loff_t pos)
{
	struct mr6_table *mrt = it->mrt;
	struct mfc6_cache *mfc;

	read_lock(&mrt_lock);
	for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) {
		it->cache = &mrt->mfc6_cache_array[it->ct];
		list_for_each_entry(mfc, it->cache, list)
			if (pos-- == 0)
				return mfc;
	}
	read_unlock(&mrt_lock);

	spin_lock_bh(&mfc_unres_lock);
	it->cache = &mrt->mfc6_unres_queue;
	list_for_each_entry(mfc, it->cache, list)
		if (pos-- == 0)
			return mfc;
	spin_unlock_bh(&mfc_unres_lock);

	it->cache = NULL;
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 101 68.24% 1 14.29%
Patrick McHardy 40 27.03% 4 57.14%
Benjamin Thery 7 4.73% 2 28.57%
Total 148 100.00% 7 100.00%

/*
 *      The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif
 */


struct ipmr_vif_iter {
	
struct seq_net_private p;
	
struct mr6_table *mrt;
	
int ct;
};



static struct mif_device *ip6mr_vif_seq_idx(struct net *net,
					    struct ipmr_vif_iter *iter,
					    loff_t pos)
{
	struct mr6_table *mrt = iter->mrt;

	for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) {
		if (!MIF_EXISTS(mrt, iter->ct))
			continue;
		if (pos-- == 0)
			return &mrt->vif6_table[iter->ct];
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 67 77.01% 1 20.00%
Patrick McHardy 12 13.79% 2 40.00%
Benjamin Thery 8 9.20% 2 40.00%
Total 87 100.00% 5 100.00%


static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos)
	
__acquires(mrt_lock)
{
	struct ipmr_vif_iter *iter = seq->private;
	struct net *net = seq_file_net(seq);
	struct mr6_table *mrt;

	mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
	if (!mrt)
		return ERR_PTR(-ENOENT);

	iter->mrt = mrt;

	read_lock(&mrt_lock);
	return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1)
		: SEQ_START_TOKEN;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 44 45.36% 1 25.00%
Patrick McHardy 40 41.24% 1 25.00%
Benjamin Thery 12 12.37% 1 25.00%
Ian Morris 1 1.03% 1 25.00%
Total 97 100.00% 4 100.00%



static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct ipmr_vif_iter *iter = seq->private;
	struct net *net = seq_file_net(seq);
	struct mr6_table *mrt = iter->mrt;

	++*pos;
	if (v == SEQ_START_TOKEN)
		return ip6mr_vif_seq_idx(net, iter, 0);

	while (++iter->ct < mrt->maxvif) {
		if (!MIF_EXISTS(mrt, iter->ct))
			continue;
		return &mrt->vif6_table[iter->ct];
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 81 75.00% 1 20.00%
Benjamin Thery 15 13.89% 2 40.00%
Patrick McHardy 12 11.11% 2 40.00%
Total 108 100.00% 5 100.00%


static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v)
	
__releases(mrt_lock)
{
	read_unlock(&mrt_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



static int ip6mr_vif_seq_show(struct seq_file *seq, void *v)
{
	struct ipmr_vif_iter *iter = seq->private;
	struct mr6_table *mrt = iter->mrt;

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq,
			 "Interface      BytesIn  PktsIn  BytesOut PktsOut Flags\n");
	} else {
		const struct mif_device *vif = v;
		const char *name = vif->dev ? vif->dev->name : "none";

		seq_printf(seq,
			   "%2td %-10s %8ld %7ld  %8ld %7ld %05X\n",
			   vif - mrt->vif6_table,
			   name, vif->bytes_in, vif->pkt_in,
			   vif->bytes_out, vif->pkt_out,
			   vif->flags);
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 93 81.58% 1 20.00%
Patrick McHardy 14 12.28% 2 40.00%
Benjamin Thery 6 5.26% 1 20.00%
Al Viro 1 0.88% 1 20.00%
Total 114 100.00% 5 100.00%


static const struct seq_operations ip6mr_vif_seq_ops = {
	.start = ip6mr_vif_seq_start,
	.next  = ip6mr_vif_seq_next,
	.stop  = ip6mr_vif_seq_stop,
	.show  = ip6mr_vif_seq_show,
};



static int ip6mr_vif_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &ip6mr_vif_seq_ops,
			    sizeof(struct ipmr_vif_iter));
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 30 90.91% 1 50.00%
Benjamin Thery 3 9.09% 1 50.00%
Total 33 100.00% 2 100.00%


static const struct file_operations ip6mr_vif_fops = {
	.owner	 = THIS_MODULE,
	.open    = ip6mr_vif_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_net,
};



static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct ipmr_mfc_iter *it = seq->private;
	struct net *net = seq_file_net(seq);
	struct mr6_table *mrt;

	mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
	if (!mrt)
		return ERR_PTR(-ENOENT);

	it->mrt = mrt;
	return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1)
		: SEQ_START_TOKEN;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 40 45.98% 1 25.00%
Hideaki Yoshifuji / 吉藤英明 34 39.08% 1 25.00%
Benjamin Thery 12 13.79% 1 25.00%
Ian Morris 1 1.15% 1 25.00%
Total 87 100.00% 4 100.00%



static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct mfc6_cache *mfc = v;
	struct ipmr_mfc_iter *it = seq->private;
	struct net *net = seq_file_net(seq);
	struct mr6_table *mrt = it->mrt;

	++*pos;

	if (v == SEQ_START_TOKEN)
		return ipmr_mfc_seq_idx(net, seq->private, 0);

	if (mfc->list.next != it->cache)
		return list_entry(mfc->list.next, struct mfc6_cache, list);

	if (it->cache == &mrt->mfc6_unres_queue)
		goto end_of_list;

	BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]);

	while (++it->ct < MFC6_LINES) {
		it->cache = &mrt->mfc6_cache_array[it->ct];
		if (list_empty(it->cache))
			continue;
		return list_first_entry(it->cache, struct mfc6_cache, list);
	}

	/* exhausted cache_array, show unresolved */
	read_unlock(&mrt_lock);
	it->cache = &mrt->mfc6_unres_queue;
	it->ct = 0;

	spin_lock_bh(&mfc_unres_lock);
	if (!list_empty(it->cache))
		return list_first_entry(it->cache, struct mfc6_cache, list);

 end_of_list:
	spin_unlock_bh(&mfc_unres_lock);
	it->cache = NULL;

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 157 62.55% 1 14.29%
Patrick McHardy 79 31.47% 4 57.14%
Benjamin Thery 15 5.98% 2 28.57%
Total 251 100.00% 7 100.00%



static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v)
{
	struct ipmr_mfc_iter *it = seq->private;
	struct mr6_table *mrt = it->mrt;

	if (it->cache == &mrt->mfc6_unres_queue)
		spin_unlock_bh(&mfc_unres_lock);
	else if (it->cache == &mrt->mfc6_cache_array[it->ct])
		read_unlock(&mrt_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 53 72.60% 1 16.67%
Patrick McHardy 12 16.44% 3 50.00%
Richard Laing 6 8.22% 1 16.67%
Benjamin Thery 2 2.74% 1 16.67%
Total 73 100.00% 6 100.00%



static int ipmr_mfc_seq_show(struct seq_file *seq, void *v)
{
	int n;

	if (v == SEQ_START_TOKEN) {
		seq_puts(seq,
			 "Group                            "
			 "Origin                           "
			 "Iif      Pkts  Bytes     Wrong  Oifs\n");
	} else {
		const struct mfc6_cache *mfc = v;
		const struct ipmr_mfc_iter *it = seq->private;
		struct mr6_table *mrt = it->mrt;

		seq_printf(seq, "%pI6 %pI6 %-3hd",
			   &mfc->mf6c_mcastgrp, &mfc->mf6c_origin,
			   mfc->mf6c_parent);

		if (it->cache != &mrt->mfc6_unres_queue) {
			seq_printf(seq, " %8lu %8lu %8lu",
				   mfc->mfc_un.res.pkt,
				   mfc->mfc_un.res.bytes,
				   mfc->mfc_un.res.wrong_if);
			for (n = mfc->mfc_un.res.minvif;
			     n < mfc->mfc_un.res.maxvif; n++) {
				if (MIF_EXISTS(mrt, n) &&
				    mfc->mfc_un.res.ttls[n] < 255)
					seq_printf(seq,
						   " %2d:%-3d",
						   n, mfc->mfc_un.res.ttls[n]);
			}
		} else {
			/* unresolved mfc_caches don't contain
                         * pkt, bytes and wrong_if values
                         */
			seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul);
		}
		seq_putc(seq, '\n');
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 176 77.88% 1 12.50%
Benjamin Thery 35 15.49% 3 37.50%
Patrick McHardy 13 5.75% 3 37.50%
Harvey Harrison 2 0.88% 1 12.50%
Total 226 100.00% 8 100.00%


static const struct seq_operations ipmr_mfc_seq_ops = {
	.start = ipmr_mfc_seq_start,
	.next  = ipmr_mfc_seq_next,
	.stop  = ipmr_mfc_seq_stop,
	.show  = ipmr_mfc_seq_show,
};



static int ipmr_mfc_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &ipmr_mfc_seq_ops,
			    sizeof(struct ipmr_mfc_iter));
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 30 90.91% 1 50.00%
Benjamin Thery 3 9.09% 1 50.00%
Total 33 100.00% 2 100.00%


static const struct file_operations ip6mr_mfc_fops = {
	.owner	 = THIS_MODULE,
	.open    = ipmr_mfc_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_net,
};
#endif

#ifdef CONFIG_IPV6_PIMSM_V2



static int pim6_rcv(struct sk_buff *skb)
{
	struct pimreghdr *pim;
	struct ipv6hdr   *encap;
	struct net_device  *reg_dev = NULL;
	struct net *net = dev_net(skb->dev);
	struct mr6_table *mrt;
	struct flowi6 fl6 = {
		.flowi6_iif	= skb->dev->ifindex,
		.flowi6_mark	= skb->mark,
        };
	int reg_vif_num;

	if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap)))
		goto drop;

	pim = (struct pimreghdr *)skb_transport_header(skb);
	if (pim->type != ((PIM_VERSION << 4) | PIM_TYPE_REGISTER) ||
	    (pim->flags & PIM_NULL_REGISTER) ||
	    (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
			     sizeof(*pim), IPPROTO_PIM,
			     csum_partial((void *)pim, sizeof(*pim), 0)) &&
	     csum_fold(skb_checksum(skb, 0, skb->len, 0))))
		goto drop;

	/* check if the inner packet is destined to mcast group */
	encap = (struct ipv6hdr *)(skb_transport_header(skb) +
				   sizeof(*pim));

	if (!ipv6_addr_is_multicast(&encap->daddr) ||
	    encap->payload_len == 0 ||
	    ntohs(encap->payload_len) + sizeof(*pim) > skb->len)
		goto drop;

	if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0)
		goto drop;
	reg_vif_num = mrt->mroute_reg_vif_num;

	read_lock(&mrt_lock);
	if (reg_vif_num >= 0)
		reg_dev = mrt->vif6_table[reg_vif_num].dev;
	if (reg_dev)
		dev_hold(reg_dev);
	read_unlock(&mrt_lock);

	if (!reg_dev)
		goto drop;

	skb->mac_header = skb->network_header;
	skb_pull(skb, (u8 *)encap - skb->data);
	skb_reset_network_header(skb);
	skb->protocol = htons(ETH_P_IPV6);
	skb->ip_summed = CHECKSUM_NONE;

	skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev));

	netif_rx(skb);

	dev_put(reg_dev);
	return 0;
 drop:
	kfree_skb(skb);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 291 72.75% 2 15.38%
Patrick McHardy 46 11.50% 2 15.38%
Thomas Goff 31 7.75% 1 7.69%
Benjamin Thery 17 4.25% 2 15.38%
Nicolas Dichtel 5 1.25% 1 7.69%
David S. Miller 5 1.25% 1 7.69%
Eric Dumazet 2 0.50% 1 7.69%
Cesar Eduardo Barros 1 0.25% 1 7.69%
Ian Morris 1 0.25% 1 7.69%
Nikolay Aleksandrov 1 0.25% 1 7.69%
Total 400 100.00% 13 100.00%


static const struct inet6_protocol pim6_protocol = {
	.handler	=	pim6_rcv,
};

/* Service routines creating virtual interfaces: PIMREG */



static netdev_tx_t reg_vif_xmit(struct sk_buff *skb,
				      struct net_device *dev)
{
	struct net *net = dev_net(dev);
	struct mr6_table *mrt;
	struct flowi6 fl6 = {
		.flowi6_oif	= dev->ifindex,
		.flowi6_iif	= skb->skb_iif ? : LOOPBACK_IFINDEX,
		.flowi6_mark	= skb->mark,
        };
	int err;

	err = ip6mr_fib_lookup(net, &fl6, &mrt);
	if (err < 0) {
		kfree_skb(skb);
		return err;
	}

	read_lock(&mrt_lock);
	dev->stats.tx_bytes += skb->len;
	dev->stats.tx_packets++;
	ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT);
	read_unlock(&mrt_lock);
	kfree_skb(skb);
	return NETDEV_TX_OK;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 55 38.46% 1 9.09%
Patrick McHardy 54 37.76% 3 27.27%
Benjamin Thery 13 9.09% 2 18.18%
Ben Greear 7 4.90% 1 9.09%
David S. Miller 6 4.20% 1 9.09%
Pavel Emelyanov 4 2.80% 1 9.09%
Cong Wang 3 2.10% 1 9.09%
Stephen Hemminger 1 0.70% 1 9.09%
Total 143 100.00% 11 100.00%



static int reg_vif_get_iflink(const struct net_device *dev)
{
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Nicolas Dichtel 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%


static const struct net_device_ops reg_vif_netdev_ops = {
	.ndo_start_xmit	= reg_vif_xmit,
	.ndo_get_iflink = reg_vif_get_iflink,
};



static void reg_vif_setup(struct net_device *dev)
{
	dev->type		= ARPHRD_PIMREG;
	dev->mtu		= 1500 - sizeof(struct ipv6hdr) - 8;
	dev->flags		= IFF_NOARP;
	dev->netdev_ops		= &reg_vif_netdev_ops;
	dev->needs_free_netdev	= true;
	dev->features		|= NETIF_F_NETNS_LOCAL;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 45 80.36% 1 25.00%
Thomas Goff 6 10.71% 1 25.00%
Stephen Hemminger 3 5.36% 1 25.00%
David S. Miller 2 3.57% 1 25.00%
Total 56 100.00% 4 100.00%



static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt)
{
	struct net_device *dev;
	char name[IFNAMSIZ];

	if (mrt->id == RT6_TABLE_DFLT)
		sprintf(name, "pim6reg");
	else
		sprintf(name, "pim6reg%u", mrt->id);

	dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup);
	if (!dev)
		return NULL;

	dev_net_set(dev, net);

	if (register_netdevice(dev)) {
		free_netdev(dev);
		return NULL;
	}

	if (dev_open(dev))
		goto failure;

	dev_hold(dev);
	return dev;

failure:
	unregister_netdevice(dev);
	return NULL;
}
Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 70 54.26% 1 14.29%
Patrick McHardy 39 30.23% 1 14.29%
Benjamin Thery 11 8.53% 1 14.29%
Wang Chen 5 3.88% 1 14.29%
Tom Gundersen 2 1.55% 1 14.29%
Ian Morris 1 0.78% 1 14.29%
Pavel Emelyanov 1 0.78% 1 14.29%
Total 129 100.00% 7 100.00%

#endif

/*
 *      Delete a VIF entry
 */



static int mif6_delete(struct mr6_table *mrt, int vifi, int notify,
		       struct list_head *head)
{
	struct mif_device *v;
	struct net_device *dev;
	struct inet6_dev *in6_dev;

	if (vifi < 0 || vifi >= mrt->maxvif)
		return -EADDRNOTAVAIL;

	v = &mrt->vif6_table[vifi];

	write_lock_bh(&mrt_lock);
	dev = v->dev;
	v->dev = NULL;

	if (!dev) {
		write_unlock_bh(&mrt_lock);
		return -EADDRNOTAVAIL;
	}

#ifdef CONFIG_IPV6_PIMSM_V2
	if (vifi == mrt->mroute_reg_vif_num)
		mrt->mroute_reg_vif_num = -1;
#endif

	if (vifi + 1 == mrt->maxvif) {
		int tmp;
		for (tmp = vifi - 1; tmp >= 0; tmp--) {
			if (MIF_EXISTS(mrt, tmp))
				break;
		}
		mrt->maxvif = tmp + 1;
	}

	write_unlock_bh(&mrt_lock);

	dev_set_allmulti(dev, -1);

	in6_dev = __in6_dev_get(dev);
	if (in6_dev) {
		in6_dev->cnf.mc_forwarding--;
		inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF,
					     NETCONFA_MC_FORWARDING,
					     dev->ifindex, &in6_dev->cnf);
	}

	if ((v->flags & MIFF_REGISTER) && !notify)
		unregister_netdevice_queue(dev, head);

	dev_put(dev);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 168 66.93% 2 18.18%
Thomas Goff 23 9.16% 1 9.09%
Nicolas Dichtel 21 8.37% 1 9.09%
Benjamin Thery 12 4.78% 3 27.27%
Patrick McHardy 9 3.59% 1 9.09%
Eric Dumazet 8 3.19% 1 9.09%
Nikolay Aleksandrov 8 3.19% 1 9.09%
David Ahern 2 0.80% 1 9.09%
Total 251 100.00% 11 100.00%



static inline void ip6mr_cache_free(struct mfc6_cache *c)
{
	kmem_cache_free(mrt_cachep, c);
}

Contributors
Person Tokens Prop Commits CommitProp
Benjamin Thery 19 100.00% 1 100.00%
Total 19 100.00% 1 100.00%

/* Destroy an unresolved cache entry, killing queued skbs
   and reporting error to netlink readers.
 */



static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c)
{
	struct net *net = read_pnet(&mrt->net);
	struct sk_buff *skb;

	atomic_dec(&mrt->cache_resolve_queue_len);

	while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) {
		if (ipv6_hdr(skb)->version == 0) {
			struct nlmsghdr *nlh = skb_pull(skb,
							sizeof(struct ipv6hdr));
			nlh->nlmsg_type = NLMSG_ERROR;
			nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr));
			skb_trim(skb, nlh->nlmsg_len);
			((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT;
			rtnl_unicast(skb, net, NETLINK_CB(skb).portid);
		} else
			kfree_skb(skb);
	}

	ip6mr_cache_free(c);
}


Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 138 84.66% 1 14.29%
Patrick McHardy 19 11.66% 2 28.57%
Benjamin Thery 3 1.84% 2 28.57%
Hong Zhi Guo 2 1.23% 1 14.29%
Eric W. Biedermann 1 0.61% 1 14.29%
Total 163 100.00% 7 100.00%

/* Timer process for all the unresolved queue. */



static void ipmr_do_expire_process(struct mr6_table *mrt)
{
	unsigned long now = jiffies;
	unsigned long expires = 10 * HZ;
	struct mfc6_cache *c, *next;

	list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
		if (time_after(c->mfc_un.unres.expires, now)) {
			/* not yet... */
			unsigned long interval = c->mfc_un.unres.expires - now;
			if (interval < expires)
				expires = interval;
			continue;
		}

		list_del(&c->list);
		mr6_netlink_event(mrt, c, RTM_DELROUTE);
		ip6mr_destroy_unres(mrt, c);
	}

	if (!list_empty(&mrt->mfc6_unres_queue))
		mod_timer(&mrt->ipmr_expire_timer, jiffies + expires);
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 94 69.63% 1 16.67%
Patrick McHardy 32 23.70% 4 66.67%
Nicolas Dichtel 9 6.67% 1 16.67%
Total 135 100.00% 6 100.00%



static void ipmr_expire_process(struct timer_list *t)
{
	struct mr6_table *mrt = from_timer(mrt, t, ipmr_expire_timer);

	if (!spin_trylock(&mfc_unres_lock)) {
		mod_timer(&mrt->ipmr_expire_timer, jiffies + 1);
		return;
	}

	if (!list_empty(&mrt->mfc6_unres_queue))
		ipmr_do_expire_process(mrt);

	spin_unlock(&mfc_unres_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 42 59.15% 1 20.00%
Patrick McHardy 17 23.94% 3 60.00%
Kees Cook 12 16.90% 1 20.00%
Total 71 100.00% 5 100.00%

/* Fill oifs list. It is called under write locked mrt_lock. */



static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache,
				    unsigned char *ttls)
{
	int vifi;

	cache->mfc_un.res.minvif = MAXMIFS;
	cache->mfc_un.res.maxvif = 0;
	memset(cache->mfc_un.res.ttls, 255, MAXMIFS);

	for (vifi = 0; vifi < mrt->maxvif; vifi++) {
		if (MIF_EXISTS(mrt, vifi) &&
		    ttls[vifi] && ttls[vifi] < 255) {
			cache->mfc_un.res.ttls[vifi] = ttls[vifi];
			if (cache->mfc_un.res.minvif > vifi)
				cache->mfc_un.res.minvif = vifi;
			if (cache->mfc_un.res.maxvif <= vifi)
				cache->mfc_un.res.maxvif = vifi + 1;
		}
	}
	cache->mfc_un.res.lastuse = jiffies;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 150 87.72% 1 14.29%
Nikolay Aleksandrov 10 5.85% 1 14.29%
Patrick McHardy 7 4.09% 2 28.57%
Benjamin Thery 2 1.17% 2 28.57%
Rami Rosen 2 1.17% 1 14.29%
Total 171 100.00% 7 100.00%



static int mif6_add(struct net *net, struct mr6_table *mrt,
		    struct mif6ctl *vifc, int mrtsock)
{
	int vifi = vifc->mif6c_mifi;
	struct mif_device *v = &mrt->vif6_table[vifi];
	struct net_device *dev;
	struct inet6_dev *in6_dev;
	int err;

	/* Is vif busy ? */
	if (MIF_EXISTS(mrt, vifi))
		return -EADDRINUSE;

	switch (vifc->mif6c_flags) {
#ifdef CONFIG_IPV6_PIMSM_V2
	case MIFF_REGISTER:
		/*
                 * Special Purpose VIF in PIM
                 * All the packets will be sent to the daemon
                 */
		if (mrt->mroute_reg_vif_num >= 0)
			return -EADDRINUSE;
		dev = ip6mr_reg_vif(net, mrt);
		if (!dev)
			return -ENOBUFS;
		err = dev_set_allmulti(dev, 1);
		if (err) {
			unregister_netdevice(dev);
			dev_put(dev);
			return err;
		}
		break;
#endif
	case 0:
		dev = dev_get_by_index(net, vifc->mif6c_pifi);
		if (!dev)
			return -EADDRNOTAVAIL;
		err = dev_set_allmulti(dev, 1);
		if (err) {
			dev_put(dev);
			return err;
		}
		break;
	default:
		return -EINVAL;
	}

	in6_dev = __in6_dev_get(dev);
	if (in6_dev) {
		in6_dev->cnf.mc_forwarding++;
		inet6_netconf_notify_devconf(dev_net(dev), RTM_NEWNETCONF,
					     NETCONFA_MC_FORWARDING,
					     dev->ifindex, &in6_dev->cnf);
	}

	/*
         *      Fill in the VIF structures
         */
	v->rate_limit = vifc->vifc_rate_limit;
	v->flags = vifc->mif6c_flags;
	if (!mrtsock)
		v->flags |= VIFF_STATIC;
	v->threshold = vifc->vifc_threshold;
	v->bytes_in = 0;
	v->bytes_out = 0;
	v->pkt_in = 0;
	v->pkt_out = 0;
	v->link = dev->ifindex;
	if (v->flags & MIFF_REGISTER)
		v->link = dev_get_iflink(dev);

	/* And finish update writing critical data */
	write_lock_bh(&mrt_lock);
	v->dev = dev;
#ifdef CONFIG_IPV6_PIMSM_V2
	if (v->flags & MIFF_REGISTER)
		mrt->mroute_reg_vif_num = vifi;
#endif
	if (vifi + 1 > mrt->maxvif)
		mrt->maxvif = vifi + 1;
	write_unlock_bh(&mrt_lock);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 251 65.36% 2 15.38%
Wang Chen 54 14.06% 2 15.38%
Nicolas Dichtel 24 6.25% 2 15.38%
Thomas Goff 23 5.99% 1 7.69%
Benjamin Thery 17 4.43% 3 23.08%
Patrick McHardy 13 3.39% 2 15.38%
David Ahern 2 0.52% 1 7.69%
Total 384 100.00% 13 100.00%



static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt,
					   const struct in6_addr *origin,
					   const struct in6_addr *mcastgrp)
{
	int line = MFC6_HASH(mcastgrp, origin);
	struct mfc6_cache *c;

	list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
		if (ipv6_addr_equal(&c->mf6c_origin, origin) &&
		    ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp))
			return c;
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 59 75.64% 1 20.00%
Patrick McHardy 14 17.95% 2 40.00%
Benjamin Thery 3 3.85% 1 20.00%
Eric Dumazet 2 2.56% 1 20.00%
Total 78 100.00% 5 100.00%

/* Look for a (*,*,oif) entry */


static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt,
						      mifi_t mifi)
{
	int line = MFC6_HASH(&in6addr_any, &in6addr_any);
	struct mfc6_cache *c;

	list_for_each_entry(c, &mrt->mfc6_cache_array[line], list)
		if (ipv6_addr_any(&c->mf6c_origin) &&
		    ipv6_addr_any(&c->mf6c_mcastgrp) &&
		    (c->mfc_un.res.ttls[mifi] < 255))
			return c;

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Nicolas Dichtel 80 100.00% 1 100.00%
Total 80 100.00% 1 100.00%

/* Look for a (*,G) entry */


static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt,
					       struct in6_addr *mcastgrp,
					       mifi_t mifi)
{
	int line = MFC6_HASH(mcastgrp, &in6addr_any);
	struct mfc6_cache *c, *proxy;

	if (ipv6_addr_any(mcastgrp))
		goto skip;

	list_for_each_entry(c, &mrt->mfc6_cache_array[line], list)
		if (ipv6_addr_any(&c->mf6c_origin) &&
		    ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) {
			if (c->mfc_un.res.ttls[mifi] < 255)
				return c;

			/* It's ok if the mifi is part of the static tree */
			proxy = ip6mr_cache_find_any_parent(mrt,
							    c->mf6c_parent);
			if (proxy && proxy->mfc_un.res.ttls[mifi] < 255)
				return c;
		}

skip:
	return ip6mr_cache_find_any_parent(mrt, mifi);
}

Contributors
Person Tokens Prop Commits CommitProp
Nicolas Dichtel 140 100.00% 1 100.00%
Total 140 100.00% 1 100.00%

/*
 *      Allocate a multicast cache entry
 */


static struct mfc6_cache *ip6mr_cache_alloc(void)
{
	struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL);
	if (!c)
		return NULL;
	c->mfc_un.res.last_assert = jiffies - MFC_ASSERT_THRESH - 1;
	c->mfc_un.res.minvif = MAXMIFS;
	return c;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 39 68.42% 1 16.67%
Thomas Goff 14 24.56% 1 16.67%
Ian Morris 1 1.75% 1 16.67%
Rami Rosen 1 1.75% 1 16.67%
Patrick McHardy 1 1.75% 1 16.67%
Joe Perches 1 1.75% 1 16.67%
Total 57 100.00% 6 100.00%



static struct mfc6_cache *ip6mr_cache_alloc_unres(void)
{
	struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC);
	if (!c)
		return NULL;
	skb_queue_head_init(&c->mfc_un.unres.unresolved);
	c->mfc_un.unres.expires = jiffies + 10 * HZ;
	return c;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 56 94.92% 1 25.00%
Ian Morris 1 1.69% 1 25.00%
Patrick McHardy 1 1.69% 1 25.00%
Joe Perches 1 1.69% 1 25.00%
Total 59 100.00% 4 100.00%

/*
 *      A cache entry has gone into a resolved state from queued
 */



static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt,
				struct mfc6_cache *uc, struct mfc6_cache *c)
{
	struct sk_buff *skb;

	/*
         *      Play the pending entries through our router
         */

	while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) {
		if (ipv6_hdr(skb)->version == 0) {
			struct nlmsghdr *nlh = skb_pull(skb,
							sizeof(struct ipv6hdr));

			if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) {
				nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh;
			} else {
				nlh->nlmsg_type = NLMSG_ERROR;
				nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr));
				skb_trim(skb, nlh->nlmsg_len);
				((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE;
			}
			rtnl_unicast(skb, net, NETLINK_CB(skb).portid);
		} else
			ip6_mr_forward(net, mrt, skb, c);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 168 88.42% 2 28.57%
Patrick McHardy 18 9.47% 3 42.86%
Hong Zhi Guo 3 1.58% 1 14.29%
Eric W. Biedermann 1 0.53% 1 14.29%
Total 190 100.00% 7 100.00%

/*
 *      Bounce a cache query up to pim6sd and netlink.
 *
 *      Called under mrt_lock.
 */



static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
			      mifi_t mifi, int assert)
{
	struct sk_buff *skb;
	struct mrt6msg *msg;
	int ret;

#ifdef CONFIG_IPV6_PIMSM_V2
	if (assert == MRT6MSG_WHOLEPKT)
		skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt)
						+sizeof(*msg));
	else
#endif
		skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC);

	if (!skb)
		return -ENOBUFS;

	/* I suppose that internal messages
         * do not require checksums */

	skb->ip_summed = CHECKSUM_UNNECESSARY;

#ifdef CONFIG_IPV6_PIMSM_V2
	if (assert == MRT6MSG_WHOLEPKT) {
		/* Ugly, but we have no choice with this interface.
                   Duplicate old header, fix length etc.
                   And all this only to mangle msg->im6_msgtype and
                   to set msg->im6_mbz to "mbz" :-)
                 */
		skb_push(skb, -skb_network_offset(pkt));

		skb_push(skb, sizeof(*msg));
		skb_reset_transport_header(skb);
		msg = (struct mrt6msg *)skb_transport_header(skb);
		msg->im6_mbz = 0;
		msg->im6_msgtype = MRT6MSG_WHOLEPKT;
		msg->im6_mif = mrt->mroute_reg_vif_num;
		msg->im6_pad = 0;
		msg->im6_src = ipv6_hdr(pkt)->saddr;
		msg->im6_dst = ipv6_hdr(pkt)->daddr;

		skb->ip_summed = CHECKSUM_UNNECESSARY;
	} else
#endif
	{
	/*
         *      Copy the IP header
         */

	skb_put(skb, sizeof(struct ipv6hdr));
	skb_reset_network_header(skb);
	skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr));

	/*
         *      Add our header
         */
	skb_put(skb, sizeof(*msg));
	skb_reset_transport_header(skb);
	msg = (struct mrt6msg *)skb_transport_header(skb);

	msg->im6_mbz = 0;
	msg->im6_msgtype = assert;
	msg->im6_mif = mifi;
	msg->im6_pad = 0;
	msg->im6_src = ipv6_hdr(pkt)->saddr;
	msg->im6_dst = ipv6_hdr(pkt)->daddr;

	skb_dst_set(skb, dst_clone(skb_dst(pkt)));
	skb->ip_summed = CHECKSUM_UNNECESSARY;
	}

	if (!mrt->mroute6_sk) {
		kfree_skb(skb);
		return -EINVAL;
	}

	mrt6msg_netlink_event(mrt, skb);

	/*
         *      Deliver to user space multicast routing algorithms
         */
	ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb);
	if (ret < 0) {
		net_warn_ratelimited("mroute6: pending queue full, dropping entries\n");
		kfree_skb(skb);
	}

	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 354 89.39% 2 16.67%
Benjamin Thery 13 3.28% 3 25.00%
Eric Dumazet 7 1.77% 1 8.33%
Julien Gomes 7 1.77% 1 8.33%
Patrick McHardy 5 1.26% 1 8.33%
Alexey Dobriyan 4 1.01% 1 8.33%
Rami Rosen 3 0.76% 1 8.33%
Joe Perches 2 0.51% 1 8.33%
Ian Morris 1 0.25% 1 8.33%
Total 396 100.00% 12 100.00%

/*
 *      Queue a packet for resolution. It gets locked cache entry!
 */


static int

ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb)
{
	bool found = false;
	int err;
	struct mfc6_cache *c;

	spin_lock_bh(&mfc_unres_lock);
	list_for_each_entry(c, &mrt->mfc6_unres_queue, list) {
		if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) &&
		    ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) {
			found = true;
			break;
		}
	}

	if (!found) {
		/*
                 *      Create a new entry if allowable
                 */

		if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 ||
		    (c = ip6mr_cache_alloc_unres()) == NULL) {
			spin_unlock_bh(&mfc_unres_lock);

			kfree_skb(skb);
			return -ENOBUFS;
		}

		/*
                 *      Fill in the new cache entry
                 */
		c->mf6c_parent = -1;
		c->mf6c_origin = ipv6_hdr(skb)->saddr;
		c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr;

		/*
                 *      Reflect first query at pim6sd
                 */
		err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE);
		if (err < 0) {
			/* If the report failed throw the cache entry
                           out - Brad Parker
                         */
			spin_unlock_bh(&mfc_unres_lock);

			ip6mr_cache_free(c);
			kfree_skb(skb);
			return err;
		}

		atomic_inc(&mrt->cache_resolve_queue_len);
		list_add(&c->list, &mrt->mfc6_unres_queue);
		mr6_netlink_event(mrt, c, RTM_NEWROUTE);

		ipmr_do_expire_process(mrt);
	}

	/*
         *      See if we can append the packet
         */
	if (c->mfc_un.unres.unresolved.qlen > 3) {
		kfree_skb(skb);
		err = -ENOBUFS;
	} else {
		skb_queue_tail(&c->mfc_un.unres.unresolved, skb);
		err = 0;
	}

	spin_unlock_bh(&mfc_unres_lock);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 238 79.60% 1 11.11%
Patrick McHardy 38 12.71% 4 44.44%
Benjamin Thery 11 3.68% 2 22.22%
Nicolas Dichtel 9 3.01% 1 11.11%
Rami Rosen 3 1.00% 1 11.11%
Total 299 100.00% 9 100.00%

/*
 *      MFC6 cache manipulation by user space
 */



static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc,
			    int parent)
{
	int line;
	struct mfc6_cache *c, *next;

	line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);

	list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) {
		if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
		    ipv6_addr_equal(&c->mf6c_mcastgrp,
				    &mfc->mf6cc_mcastgrp.sin6_addr) &&
		    (parent == -1 || parent == c->mf6c_parent)) {
			write_lock_bh(&mrt_lock);
			list_del(&c->list);
			write_unlock_bh(&mrt_lock);

			mr6_netlink_event(mrt, c, RTM_DELROUTE);
			ip6mr_cache_free(c);
			return 0;
		}
	}
	return -ENOENT;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 102 68.46% 1 14.29%
Nicolas Dichtel 25 16.78% 2 28.57%
Patrick McHardy 18 12.08% 2 28.57%
Benjamin Thery 4 2.68% 2 28.57%
Total 149 100.00% 7 100.00%



static int ip6mr_device_event(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);
	struct mr6_table *mrt;
	struct mif_device *v;
	int ct;

	if (event != NETDEV_UNREGISTER)
		return NOTIFY_DONE;

	ip6mr_for_each_table(mrt, net) {
		v = &mrt->vif6_table[0];
		for (ct = 0; ct < mrt->maxvif; ct++, v++) {
			if (v->dev == dev)
				mif6_delete(mrt, ct, 1, NULL);
		}
	}

	return NOTIFY_DONE;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 85 70.25% 1 14.29%
Patrick McHardy 16 13.22% 2 28.57%
Benjamin Thery 13 10.74% 1 14.29%
Jiri Pirko 3 2.48% 1 14.29%
Nikolay Aleksandrov 3 2.48% 1 14.29%
Eric Dumazet 1 0.83% 1 14.29%
Total 121 100.00% 7 100.00%


static struct notifier_block ip6_mr_notifier = {
	.notifier_call = ip6mr_device_event
};

/*
 *      Setup for IP multicast routing
 */



static int __net_init ip6mr_net_init(struct net *net)
{
	int err;

	err = ip6mr_rules_init(net);
	if (err < 0)
		goto fail;

#ifdef CONFIG_PROC_FS
	err = -ENOMEM;
	if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops))
		goto proc_vif_fail;
	if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops))
		goto proc_cache_fail;
#endif

	return 0;

#ifdef CONFIG_PROC_FS
proc_cache_fail:
	remove_proc_entry("ip6_mr_vif", net->proc_net);
proc_vif_fail:
	ip6mr_rules_exit(net);
#endif
fail:
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Benjamin Thery 86 76.79% 3 42.86%
Gao Feng 15 13.39% 2 28.57%
Patrick McHardy 11 9.82% 2 28.57%
Total 112 100.00% 7 100.00%



static void __net_exit ip6mr_net_exit(struct net *net)
{
#ifdef CONFIG_PROC_FS
	remove_proc_entry("ip6_mr_cache", net->proc_net);
	remove_proc_entry("ip6_mr_vif", net->proc_net);
#endif
	ip6mr_rules_exit(net);
}

Contributors
Person Tokens Prop Commits CommitProp
Benjamin Thery 28 70.00% 3 60.00%
Gao Feng 10 25.00% 1 20.00%
Patrick McHardy 2 5.00% 1 20.00%
Total 40 100.00% 5 100.00%


static struct pernet_operations ip6mr_net_ops = {
	.init = ip6mr_net_init,
	.exit = ip6mr_net_exit,
};



int __init ip6_mr_init(void)
{
	int err;

	mrt_cachep = kmem_cache_create("ip6_mrt_cache",
				       sizeof(struct mfc6_cache),
				       0, SLAB_HWCACHE_ALIGN,
				       NULL);
	if (!mrt_cachep)
		return -ENOMEM;

	err = register_pernet_subsys(&ip6mr_net_ops);
	if (err)
		goto reg_pernet_fail;

	err = register_netdevice_notifier(&ip6_mr_notifier);
	if (err)
		goto reg_notif_fail;
#ifdef CONFIG_IPV6_PIMSM_V2
	if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) {
		pr_err("%s: can't add PIM protocol\n", __func__);
		err = -EAGAIN;
		goto add_proto_fail;
	}
#endif
	rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL,
		      ip6mr_rtm_dumproute, 0);
	return 0;
#ifdef CONFIG_IPV6_PIMSM_V2
add_proto_fail:
	unregister_netdevice_notifier(&ip6_mr_notifier);
#endif
reg_notif_fail:
	unregister_pernet_subsys(&ip6mr_net_ops);
reg_pernet_fail:
	kmem_cache_destroy(mrt_cachep);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Goff 43 28.67% 1 11.11%
Hideaki Yoshifuji / 吉藤英明 37 24.67% 1 11.11%
Benjamin Thery 27 18.00% 2 22.22%
Wang Chen 26 17.33% 1 11.11%
Patrick McHardy 11 7.33% 1 11.11%
Joe Perches 4 2.67% 1 11.11%
Greg Rose 1 0.67% 1 11.11%
Florian Westphal 1 0.67% 1 11.11%
Total 150 100.00% 9 100.00%



void ip6_mr_cleanup(void)
{
	rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE);
#ifdef CONFIG_IPV6_PIMSM_V2
	inet6_del_protocol(&pim6_protocol, IPPROTO_PIM);
#endif
	unregister_netdevice_notifier(&ip6_mr_notifier);
	unregister_pernet_subsys(&ip6mr_net_ops);
	kmem_cache_destroy(mrt_cachep);
}

Contributors
Person Tokens Prop Commits CommitProp
Duan Jiong 20 45.45% 1 25.00%
Wang Chen 17 38.64% 1 25.00%
Benjamin Thery 6 13.64% 1 25.00%
Hideaki Yoshifuji / 吉藤英明 1 2.27% 1 25.00%
Total 44 100.00% 4 100.00%



static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt,
			 struct mf6cctl *mfc, int mrtsock, int parent)
{
	bool found = false;
	int line;
	struct mfc6_cache *uc, *c;
	unsigned char ttls[MAXMIFS];
	int i;

	if (mfc->mf6cc_parent >= MAXMIFS)
		return -ENFILE;

	memset(ttls, 255, MAXMIFS);
	for (i = 0; i < MAXMIFS; i++) {
		if (IF_ISSET(i, &mfc->mf6cc_ifset))
			ttls[i] = 1;

	}

	line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr);

	list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) {
		if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) &&
		    ipv6_addr_equal(&c->mf6c_mcastgrp,
				    &mfc->mf6cc_mcastgrp.sin6_addr) &&
		    (parent == -1 || parent == mfc->mf6cc_parent)) {
			found = true;
			break;
		}
	}

	if (found) {
		write_lock_bh(&mrt_lock);
		c->mf6c_parent = mfc->mf6cc_parent;
		ip6mr_update_thresholds(mrt, c, ttls);
		if (!mrtsock)
			c->mfc_flags |= MFC_STATIC;
		write_unlock_bh(&mrt_lock);
		mr6_netlink_event(mrt, c, RTM_NEWROUTE);
		return 0;
	}

	if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) &&
	    !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr))
		return -EINVAL;

	c = ip6mr_cache_alloc();
	if (!c)
		return -ENOMEM;

	c->mf6c_origin = mfc->mf6cc_origin.sin6_addr;
	c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr;
	c->mf6c_parent = mfc->mf6cc_parent;
	ip6mr_update_thresholds(mrt, c, ttls);
	if (!mrtsock)
		c->mfc_flags |= MFC_STATIC;

	write_lock_bh(&mrt_lock);
	list_add(&c->list, &mrt->mfc6_cache_array[line]);
	write_unlock_bh(&mrt_lock);

	/*
         *      Check to see if we resolved a queued list. If so we
         *      need to send on the frames and tidy up.
         */
	found = false;
	spin_lock_bh(&mfc_unres_lock);
	list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) {
		if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) &&
		    ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) {
			list_del(&uc->list);
			atomic_dec(&mrt->cache_resolve_queue_len);
			found = true;
			break;
		}
	}
	if (list_empty(&mrt->mfc6_unres_queue))
		del_timer(&mrt->ipmr_expire_timer);
	spin_unlock_bh(&mfc_unres_lock);

	if (found) {
		ip6mr_cache_resolve(net, mrt, uc, c);
		ip6mr_cache_free(uc);
	}
	mr6_netlink_event(mrt, c, RTM_NEWROUTE);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 345 69.70% 1 7.69%
Patrick McHardy 86 17.37% 5 38.46%
Nicolas Dichtel 45 9.09% 2 15.38%
Benjamin Thery 15 3.03% 3 23.08%
Rami Rosen 3 0.61% 1 7.69%
Ian Morris 1 0.20% 1 7.69%
Total 495 100.00% 13 100.00%

/*
 *      Close the multicast socket, and clear the vif tables etc
 */



static void mroute_clean_tables(struct mr6_table *mrt, bool all)
{
	int i;
	LIST_HEAD(list);
	struct mfc6_cache *c, *next;

	/*
         *      Shut down all active vif entries
         */
	for (i = 0; i < mrt->maxvif; i++) {
		if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC))
			continue;
		mif6_delete(mrt, i, 0, &list);
	}
	unregister_netdevice_many(&list);

	/*
         *      Wipe the cache
         */
	for (i = 0; i < MFC6_LINES; i++) {
		list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) {
			if (!all && (c->mfc_flags & MFC_STATIC))
				continue;
			write_lock_bh(&mrt_lock);
			list_del(&c->list);
			write_unlock_bh(&mrt_lock);

			mr6_netlink_event(mrt, c, RTM_DELROUTE);
			ip6mr_cache_free(c);
		}
	}

	if (atomic_read(&mrt->cache_resolve_queue_len) != 0) {
		spin_lock_bh(&mfc_unres_lock);
		list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) {
			list_del(&c->list);
			mr6_netlink_event(mrt, c, RTM_DELROUTE);
			ip6mr_destroy_unres(mrt, c);
		}
		spin_unlock_bh(&mfc_unres_lock);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 126 56.50% 1 9.09%
Patrick McHardy 46 20.63% 3 27.27%
Nicolas Dichtel 18 8.07% 1 9.09%
Eric Dumazet 14 6.28% 1 9.09%
Nikolay Aleksandrov 13 5.83% 2 18.18%
Benjamin Thery 6 2.69% 3 27.27%
Total 223 100.00% 11 100.00%



static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk)
{
	int err = 0;
	struct net *net = sock_net(sk);

	rtnl_lock();
	write_lock_bh(&mrt_lock);
	if (likely(mrt->mroute6_sk == NULL)) {
		mrt->mroute6_sk = sk;
		net->ipv6.devconf_all->mc_forwarding++;
	} else {
		err = -EADDRINUSE;
	}
	write_unlock_bh(&mrt_lock);

	if (!err)
		inet6_netconf_notify_devconf(net, RTM_NEWNETCONF,
					     NETCONFA_MC_FORWARDING,
					     NETCONFA_IFINDEX_ALL,
					     net->ipv6.devconf_all);
	rtnl_unlock();

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 42 38.18% 1 12.50%
Eric Dumazet 20 18.18% 1 12.50%
Nicolas Dichtel 15 13.64% 1 12.50%
Benjamin Thery 14 12.73% 2 25.00%
Thomas Goff 10 9.09% 1 12.50%
Patrick McHardy 7 6.36% 1 12.50%
David Ahern 2 1.82% 1 12.50%
Total 110 100.00% 8 100.00%



int ip6mr_sk_done(struct sock *sk)
{
	int err = -EACCES;
	struct net *net = sock_net(sk);
	struct mr6_table *mrt;

	if (sk->sk_type != SOCK_RAW ||
	    inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
		return err;

	rtnl_lock();
	ip6mr_for_each_table(mrt, net) {
		if (sk == mrt->mroute6_sk) {
			write_lock_bh(&mrt_lock);
			mrt->mroute6_sk = NULL;
			net->ipv6.devconf_all->mc_forwarding--;
			write_unlock_bh(&mrt_lock);
			inet6_netconf_notify_devconf(net, RTM_NEWNETCONF,
						     NETCONFA_MC_FORWARDING,
						     NETCONFA_IFINDEX_ALL,
						     net->ipv6.devconf_all);

			mroute_clean_tables(mrt, false);
			err = 0;
			break;
		}
	}
	rtnl_unlock();

	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 45 33.58% 1 9.09%
Patrick McHardy 21 15.67% 2 18.18%
Francesco Ruggeri 20 14.93% 1 9.09%
Nicolas Dichtel 15 11.19% 1 9.09%
Benjamin Thery 14 10.45% 2 18.18%
Thomas Goff 9 6.72% 1 9.09%
Eric Dumazet 6 4.48% 1 9.09%
David Ahern 2 1.49% 1 9.09%
Nikolay Aleksandrov 2 1.49% 1 9.09%
Total 134 100.00% 11 100.00%



struct sock *mroute6_socket(struct net *net, struct sk_buff *skb)
{
	struct mr6_table *mrt;
	struct flowi6 fl6 = {
		.flowi6_iif	= skb->skb_iif ? : LOOPBACK_IFINDEX,
		.flowi6_oif	= skb->dev->ifindex,
		.flowi6_mark	= skb->mark,
        };

	if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0)
		return NULL;

	return mrt->mroute6_sk;
}

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 68 88.31% 2 50.00%
David S. Miller 6 7.79% 1 25.00%
Julian Anastasov 3 3.90% 1 25.00%
Total 77 100.00% 4 100.00%

/*
 *      Socket options and virtual interface manipulation. The whole
 *      virtual interface system is a complete heap, but unfortunately
 *      that's how BSD mrouted happens to think. Maybe one day with a proper
 *      MOSPF/PIM router set up we can clean this up.
 */



int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
{
	int ret, parent = 0;
	struct mif6ctl vif;
	struct mf6cctl mfc;
	mifi_t mifi;
	struct net *net = sock_net(sk);
	struct mr6_table *mrt;

	if (sk->sk_type != SOCK_RAW ||
	    inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
		return -EOPNOTSUPP;

	mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
	if (!mrt)
		return -ENOENT;

	if (optname != MRT6_INIT) {
		if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN))
			return -EACCES;
	}

	switch (optname) {
	case MRT6_INIT:
		if (optlen < sizeof(int))
			return -EINVAL;

		return ip6mr_sk_init(mrt, sk);

	case MRT6_DONE:
		return ip6mr_sk_done(sk);

	case MRT6_ADD_MIF:
		if (optlen < sizeof(vif))
			return -EINVAL;
		if (copy_from_user(&vif, optval, sizeof(vif)))
			return -EFAULT;
		if (vif.mif6c_mifi >= MAXMIFS)
			return -ENFILE;
		rtnl_lock();
		ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk);
		rtnl_unlock();
		return ret;

	case MRT6_DEL_MIF:
		if (optlen < sizeof(mifi_t))
			return -EINVAL;
		if (copy_from_user(&mifi, optval, sizeof(mifi_t)))
			return -EFAULT;
		rtnl_lock();
		ret = mif6_delete(mrt, mifi, 0, NULL);
		rtnl_unlock();
		return ret;

	/*
         *      Manipulate the forwarding caches. These live
         *      in a sort of kernel/user symbiosis.
         */
	case MRT6_ADD_MFC:
	case MRT6_DEL_MFC:
		parent = -1;
		/* fall through */
	case MRT6_ADD_MFC_PROXY:
	case MRT6_DEL_MFC_PROXY:
		if (optlen < sizeof(mfc))
			return -EINVAL;
		if (copy_from_user(&mfc, optval, sizeof(mfc)))
			return -EFAULT;
		if (parent == 0)
			parent = mfc.mf6cc_parent;
		rtnl_lock();
		if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY)
			ret = ip6mr_mfc_delete(mrt, &mfc, parent);
		else
			ret = ip6mr_mfc_add(net, mrt, &mfc,
					    sk == mrt->mroute6_sk, parent);
		rtnl_unlock();
		return ret;

	/*
         *      Control PIM assert (to activate pim will activate assert)
         */
	case MRT6_ASSERT:
	{
		int v;

		if (optlen != sizeof(v))
			return -EINVAL;
		if (get_user(v, (int __user *)optval))
			return -EFAULT;
		mrt->mroute_do_assert = v;
		return 0;
	}

#ifdef CONFIG_IPV6_PIMSM_V2
	case MRT6_PIM:
	{
		int v;

		if (optlen != sizeof(v))
			return -EINVAL;
		if (get_user(v, (int __user *)optval))
			return -EFAULT;
		v = !!v;
		rtnl_lock();
		ret = 0;
		if (v != mrt->mroute_do_pim) {
			mrt->mroute_do_pim = v;
			mrt->mroute_do_assert = v;
		}
		rtnl_unlock();
		return ret;
	}

#endif
#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES
	case MRT6_TABLE:
	{
		u32 v;

		if (optlen != sizeof(u32))
			return -EINVAL;
		if (get_user(v, (u32 __user *)optval))
			return -EFAULT;
		/* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */
		if (v != RT_TABLE_DEFAULT && v >= 100000000)
			return -EINVAL;
		if (sk == mrt->mroute6_sk)
			return -EBUSY;

		rtnl_lock();
		ret = 0;
		if (!ip6mr_new_table(net, v))
			ret = -ENOMEM;
		raw6_sk(sk)->ip6mr_table = v;
		rtnl_unlock();
		return ret;
	}
#endif
	/*
         *      Spurious command, or MRT6_VERSION which you cannot
         *      set.
         */
	default:
		return -ENOPROTOOPT;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 390 58.65% 2 11.11%
Patrick McHardy 138 20.75% 2 11.11%
Nicolas Dichtel 35 5.26% 1 5.56%
Joe Perches 26 3.91% 1 5.56%
Benjamin Thery 26 3.91% 2 11.11%
Xin Long 21 3.16% 1 5.56%
Dan Carpenter 15 2.26% 1 5.56%
Eric W. Biedermann 5 0.75% 1 5.56%
Nikolay Aleksandrov 2 0.30% 1 5.56%
Rami Rosen 2 0.30% 2 11.11%
Eric Dumazet 2 0.30% 1 5.56%
Gustavo A. R. Silva 1 0.15% 1 5.56%
Ian Morris 1 0.15% 1 5.56%
David S. Miller 1 0.15% 1 5.56%
Total 665 100.00% 18 100.00%

/*
 *      Getsock opt support for the multicast routing system.
 */



int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval,
			  int __user *optlen)
{
	int olr;
	int val;
	struct net *net = sock_net(sk);
	struct mr6_table *mrt;

	if (sk->sk_type != SOCK_RAW ||
	    inet_sk(sk)->inet_num != IPPROTO_ICMPV6)
		return -EOPNOTSUPP;

	mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
	if (!mrt)
		return -ENOENT;

	switch (optname) {
	case MRT6_VERSION:
		val = 0x0305;
		break;
#ifdef CONFIG_IPV6_PIMSM_V2
	case MRT6_PIM:
		val = mrt->mroute_do_pim;
		break;
#endif
	case MRT6_ASSERT:
		val = mrt->mroute_do_assert;
		break;
	default:
		return -ENOPROTOOPT;
	}

	if (get_user(olr, optlen))
		return -EFAULT;

	olr = min_t(int, olr, sizeof(int));
	if (olr < 0)
		return -EINVAL;

	if (put_user(olr, optlen))
		return -EFAULT;
	if (copy_to_user(optval, &val, olr))
		return -EFAULT;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 138 67.65% 2 28.57%
Patrick McHardy 32 15.69% 2 28.57%
Xin Long 21 10.29% 1 14.29%
Benjamin Thery 12 5.88% 1 14.29%
Ian Morris 1 0.49% 1 14.29%
Total 204 100.00% 7 100.00%

/*
 *      The IP multicast ioctl support routines.
 */



int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg)
{
	struct sioc_sg_req6 sr;
	struct sioc_mif_req6 vr;
	struct mif_device *vif;
	struct mfc6_cache *c;
	struct net *net = sock_net(sk);
	struct mr6_table *mrt;

	mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
	if (!mrt)
		return -ENOENT;

	switch (cmd) {
	case SIOCGETMIFCNT_IN6:
		if (copy_from_user(&vr, arg, sizeof(vr)))
			return -EFAULT;
		if (vr.mifi >= mrt->maxvif)
			return -EINVAL;
		read_lock(&mrt_lock);
		vif = &mrt->vif6_table[vr.mifi];
		if (MIF_EXISTS(mrt, vr.mifi)) {
			vr.icount = vif->pkt_in;
			vr.ocount = vif->pkt_out;
			vr.ibytes = vif->bytes_in;
			vr.obytes = vif->bytes_out;
			read_unlock(&mrt_lock);

			if (copy_to_user(arg, &vr, sizeof(vr)))
				return -EFAULT;
			return 0;
		}
		read_unlock(&mrt_lock);
		return -EADDRNOTAVAIL;
	case SIOCGETSGCNT_IN6:
		if (copy_from_user(&sr, arg, sizeof(sr)))
			return -EFAULT;

		read_lock(&mrt_lock);
		c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr);
		if (c) {
			sr.pktcnt = c->mfc_un.res.pkt;
			sr.bytecnt = c->mfc_un.res.bytes;
			sr.wrong_if = c->mfc_un.res.wrong_if;
			read_unlock(&mrt_lock);

			if (copy_to_user(arg, &sr, sizeof(sr)))
				return -EFAULT;
			return 0;
		}
		read_unlock(&mrt_lock);
		return -EADDRNOTAVAIL;
	default:
		return -ENOIOCTLCMD;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 305 86.16% 1 16.67%
Patrick McHardy 34 9.60% 2 33.33%
Benjamin Thery 14 3.95% 2 33.33%
Ian Morris 1 0.28% 1 16.67%
Total 354 100.00% 6 100.00%

#ifdef CONFIG_COMPAT

struct compat_sioc_sg_req6 {
	
struct sockaddr_in6 src;
	
struct sockaddr_in6 grp;
	
compat_ulong_t pktcnt;
	
compat_ulong_t bytecnt;
	
compat_ulong_t wrong_if;
};


struct compat_sioc_mif_req6 {
	
mifi_t	mifi;
	
compat_ulong_t icount;
	
compat_ulong_t ocount;
	
compat_ulong_t ibytes;
	
compat_ulong_t obytes;
};



int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
{
	struct compat_sioc_sg_req6 sr;
	struct compat_sioc_mif_req6 vr;
	struct mif_device *vif;
	struct mfc6_cache *c;
	struct net *net = sock_net(sk);
	struct mr6_table *mrt;

	mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT);
	if (!mrt)
		return -ENOENT;

	switch (cmd) {
	case SIOCGETMIFCNT_IN6:
		if (copy_from_user(&vr, arg, sizeof(vr)))
			return -EFAULT;
		if (vr.mifi >= mrt->maxvif)
			return -EINVAL;
		read_lock(&mrt_lock);
		vif = &mrt->vif6_table[vr.mifi];
		if (MIF_EXISTS(mrt, vr.mifi)) {
			vr.icount = vif->pkt_in;
			vr.ocount = vif->pkt_out;
			vr.ibytes = vif->bytes_in;
			vr.obytes = vif->bytes_out;
			read_unlock(&mrt_lock);

			if (copy_to_user(arg, &vr, sizeof(vr)))
				return -EFAULT;
			return 0;
		}
		read_unlock(&mrt_lock);
		return -EADDRNOTAVAIL;
	case SIOCGETSGCNT_IN6:
		if (copy_from_user(&sr, arg, sizeof(sr)))
			return -EFAULT;

		read_lock(&mrt_lock);
		c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr);
		if (c) {
			sr.pktcnt = c->mfc_un.res.pkt;
			sr.bytecnt = c->mfc_un.res.bytes;
			sr.wrong_if = c->mfc_un.res.wrong_if;
			read_unlock(&mrt_lock);

			if (copy_to_user(arg, &sr, sizeof(sr)))
				return -EFAULT;
			return 0;
		}
		read_unlock(&mrt_lock);
		return -EADDRNOTAVAIL;
	default:
		return -ENOIOCTLCMD;
	}
}
Contributors
Person Tokens Prop Commits CommitProp
David S. Miller 354 99.72% 1 50.00%
Ian Morris 1 0.28% 1 50.00%
Total 355 100.00% 2 100.00%

#endif



static inline int ip6mr_forward2_finish(struct net *net, struct sock *sk, struct sk_buff *skb)
{
	__IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
			IPSTATS_MIB_OUTFORWDATAGRAMS);
	__IP6_ADD_STATS(net, ip6_dst_idev(skb_dst(skb)),
			IPSTATS_MIB_OUTOCTETS, skb->len);
	return dst_output(net, sk, skb);
}

Contributors
Person Tokens Prop Commits CommitProp
Vincent Bernat 17 25.76% 1 9.09%
Hideaki Yoshifuji / 吉藤英明 17 25.76% 1 9.09%
Eric W. Biedermann 11 16.67% 4 36.36%
Rami Rosen 8 12.12% 1 9.09%
David S. Miller 7 10.61% 1 9.09%
Eric Dumazet 5 7.58% 2 18.18%
Denis V. Lunev 1 1.52% 1 9.09%
Total 66 100.00% 11 100.00%

/*
 *      Processing handlers for ip6mr_forward
 */



static int ip6mr_forward2(struct net *net, struct mr6_table *mrt,
			  struct sk_buff *skb, struct mfc6_cache *c, int vifi)
{
	struct ipv6hdr *ipv6h;
	struct mif_device *vif = &mrt->vif6_table[vifi];
	struct net_device *dev;
	struct dst_entry *dst;
	struct flowi6 fl6;

	if (!vif->dev)
		goto out_free;

#ifdef CONFIG_IPV6_PIMSM_V2
	if (vif->flags & MIFF_REGISTER) {
		vif->pkt_out++;
		vif->bytes_out += skb->len;
		vif->dev->stats.tx_bytes += skb->len;
		vif->dev->stats.tx_packets++;
		ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT);
		goto out_free;
	}
#endif

	ipv6h = ipv6_hdr(skb);

	fl6 = (struct flowi6) {
		.flowi6_oif = vif->link,
		.daddr = ipv6h->daddr,
        };

	dst = ip6_route_output(net, NULL, &fl6);
	if (dst->error) {
		dst_release(dst);
		goto out_free;
	}

	skb_dst_drop(skb);
	skb_dst_set(skb, dst);

	/*
         * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally
         * not only before forwarding, but after forwarding on all output
         * interfaces. It is clear, if mrouter runs a multicasting
         * program, it should receive packets not depending to what interface
         * program is joined.
         * If we will not make it, the program will have to join on all
         * interfaces. On the other hand, multihoming host (or router, but
         * not mrouter) cannot join to more than one interface - it will
         * result in receiving multiple packets.
         */
	dev = vif->dev;
	skb->dev = dev;
	vif->pkt_out++;
	vif->bytes_out += skb->len;

	/* We are about to write */
	/* XXX: extension headers? */
	if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev)))
		goto out_free;

	ipv6h = ipv6_hdr(skb);
	ipv6h->hop_limit--;

	IP6CB(skb)->flags |= IP6SKB_FORWARDED;

	return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD,
		       net, NULL, skb, skb->dev, dev,
		       ip6mr_forward2_finish);

out_free:
	kfree_skb(skb);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 255 83.61% 2 13.33%
Patrick McHardy 12 3.93% 2 13.33%
Li RongQing 9 2.95% 1 6.67%
David S. Miller 9 2.95% 2 13.33%
Eric Dumazet 5 1.64% 1 6.67%
Pavel Emelyanov 4 1.31% 1 6.67%
Ilpo Järvinen 3 0.98% 1 6.67%
Benjamin Thery 3 0.98% 1 6.67%
Eric W. Biedermann 2 0.66% 1 6.67%
Jan Engelhardt 1 0.33% 1 6.67%
Ian Morris 1 0.33% 1 6.67%
Changli Gao 1 0.33% 1 6.67%
Total 305 100.00% 15 100.00%



static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev)
{
	int ct;

	for (ct = mrt->maxvif - 1; ct >= 0; ct--) {
		if (mrt->vif6_table[ct].dev == dev)
			break;
	}
	return ct;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 46 83.64% 1 33.33%
Patrick McHardy 7 12.73% 1 33.33%
Benjamin Thery 2 3.64% 1 33.33%
Total 55 100.00% 3 100.00%



static void ip6_mr_forward(struct net *net, struct mr6_table *mrt,
			   struct sk_buff *skb, struct mfc6_cache *cache)
{
	int psend = -1;
	int vif, ct;
	int true_vifi = ip6mr_find_vif(mrt, skb->dev);

	vif = cache->mf6c_parent;
	cache->mfc_un.res.pkt++;
	cache->mfc_un.res.bytes += skb->len;
	cache->mfc_un.res.lastuse = jiffies;

	if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) {
		struct mfc6_cache *cache_proxy;

		/* For an (*,G) entry, we only check that the incoming
                 * interface is part of the static tree.
                 */
		cache_proxy = ip6mr_cache_find_any_parent(mrt, vif);
		if (cache_proxy &&
		    cache_proxy->mfc_un.res.ttls[true_vifi] < 255)
			goto forward;
	}

	/*
         * Wrong interface: drop packet and (maybe) send PIM assert.
         */
	if (mrt->vif6_table[vif].dev != skb->dev) {
		cache->mfc_un.res.wrong_if++;

		if (true_vifi >= 0 && mrt->mroute_do_assert &&
		    /* pimsm uses asserts, when switching from RPT to SPT,
                       so that we cannot check that packet arrived on an oif.
                       It is bad, but otherwise we would need to move pretty
                       large chunk of pimd to kernel. Ough... --ANK
                     */
		    (mrt->mroute_do_pim ||
		     cache->mfc_un.res.ttls[true_vifi] < 255) &&
		    time_after(jiffies,
			       cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) {
			cache->mfc_un.res.last_assert = jiffies;
			ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF);
		}
		goto dont_forward;
	}

forward:
	mrt->vif6_table[vif].pkt_in++;
	mrt->vif6_table[vif].bytes_in += skb->len;

	/*
         *      Forward the frame
         */
	if (ipv6_addr_any(&cache->mf6c_origin) &&
	    ipv6_addr_any(&cache->mf6c_mcastgrp)) {
		if (true_vifi >= 0 &&
		    true_vifi != cache->mf6c_parent &&
		    ipv6_hdr(skb)->hop_limit >
				cache->mfc_un.res.ttls[cache->mf6c_parent]) {
			/* It's an (*,*) entry and the packet is not coming from
                         * the upstream: forward the packet to the upstream
                         * only.
                         */
			psend = cache->mf6c_parent;
			goto last_forward;
		}
		goto dont_forward;
	}
	for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) {
		/* For (*,G) entry, don't forward to the incoming interface */
		if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) &&
		    ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) {
			if (psend != -1) {
				struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
				if (skb2)
					ip6mr_forward2(net, mrt, skb2, cache, psend);
			}
			psend = ct;
		}
	}
last_forward:
	if (psend != -1) {
		ip6mr_forward2(net, mrt, skb, cache, psend);
		return;
	}

dont_forward:
	kfree_skb(skb);
}


Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 277 59.06% 2 22.22%
Nicolas Dichtel 149 31.77% 1 11.11%
Patrick McHardy 24 5.12% 2 22.22%
Nikolay Aleksandrov 10 2.13% 1 11.11%
Benjamin Thery 6 1.28% 1 11.11%
Rami Rosen 2 0.43% 1 11.11%
Fabian Frederick 1 0.21% 1 11.11%
Total 469 100.00% 9 100.00%

/*
 *      Multicast packets for forwarding arrive here
 */



int ip6_mr_input(struct sk_buff *skb)
{
	struct mfc6_cache *cache;
	struct net *net = dev_net(skb->dev);
	struct mr6_table *mrt;
	struct flowi6 fl6 = {
		.flowi6_iif	= skb->dev->ifindex,
		.flowi6_mark	= skb->mark,
        };
	int err;

	err = ip6mr_fib_lookup(net, &fl6, &mrt);
	if (err < 0) {
		kfree_skb(skb);
		return err;
	}

	read_lock(&mrt_lock);
	cache = ip6mr_cache_find(mrt,
				 &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr);
	if (!cache) {
		int vif = ip6mr_find_vif(mrt, skb->dev);

		if (vif >= 0)
			cache = ip6mr_cache_find_any(mrt,
						     &ipv6_hdr(skb)->daddr,
						     vif);
	}

	/*
         *      No usable cache entry
         */
	if (!cache) {
		int vif;

		vif = ip6mr_find_vif(mrt, skb->dev);
		if (vif >= 0) {
			int err = ip6mr_cache_unresolved(mrt, vif, skb);
			read_unlock(&mrt_lock);

			return err;
		}
		read_unlock(&mrt_lock);
		kfree_skb(skb);
		return -ENODEV;
	}

	ip6_mr_forward(net, mrt, skb, cache);

	read_unlock(&mrt_lock);

	return 0;
}


Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 119 48.97% 1 11.11%
Patrick McHardy 55 22.63% 3 33.33%
Nicolas Dichtel 41 16.87% 1 11.11%
Benjamin Thery 14 5.76% 1 11.11%
Ben Greear 7 2.88% 1 11.11%
David S. Miller 5 2.06% 1 11.11%
Ian Morris 2 0.82% 1 11.11%
Total 243 100.00% 9 100.00%



static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
			       struct mfc6_cache *c, struct rtmsg *rtm)
{
	struct rta_mfc_stats mfcs;
	struct nlattr *mp_attr;
	struct rtnexthop *nhp;
	unsigned long lastuse;
	int ct;

	/* If cache is unresolved, don't try to parse IIF and OIF */
	if (c->mf6c_parent >= MAXMIFS) {
		rtm->rtm_flags |= RTNH_F_UNRESOLVED;
		return -ENOENT;
	}

	if (MIF_EXISTS(mrt, c->mf6c_parent) &&
	    nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0)
		return -EMSGSIZE;
	mp_attr = nla_nest_start(skb, RTA_MULTIPATH);
	if (!mp_attr)
		return -EMSGSIZE;

	for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) {
		if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) {
			nhp = nla_reserve_nohdr(skb, sizeof(*nhp));
			if (!nhp) {
				nla_nest_cancel(skb, mp_attr);
				return -EMSGSIZE;
			}

			nhp->rtnh_flags = 0;
			nhp->rtnh_hops = c->mfc_un.res.ttls[ct];
			nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex;
			nhp->rtnh_len = sizeof(*nhp);
		}
	}

	nla_nest_end(skb, mp_attr);

	lastuse = READ_ONCE(c->mfc_un.res.lastuse);
	lastuse = time_after_eq(jiffies, lastuse) ? jiffies - lastuse : 0;

	mfcs.mfcs_packets = c->mfc_un.res.pkt;
	mfcs.mfcs_bytes = c->mfc_un.res.bytes;
	mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if;
	if (nla_put_64bit(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs, RTA_PAD) ||
	    nla_put_u64_64bit(skb, RTA_EXPIRES, jiffies_to_clock_t(lastuse),
			      RTA_PAD))
		return -EMSGSIZE;

	rtm->rtm_type = RTN_MULTICAST;
	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 157 42.66% 2 12.50%
Nicolas Dichtel 126 34.24% 4 25.00%
Nikolay Aleksandrov 62 16.85% 3 18.75%
Patrick McHardy 10 2.72% 3 18.75%
Thomas Graf 9 2.45% 1 6.25%
Ian Morris 2 0.54% 1 6.25%
Benjamin Thery 1 0.27% 1 6.25%
Dan Carpenter 1 0.27% 1 6.25%
Total 368 100.00% 16 100.00%



int ip6mr_get_route(struct net *net, struct sk_buff *skb, struct rtmsg *rtm,
		    u32 portid)
{
	int err;
	struct mr6_table *mrt;
	struct mfc6_cache *cache;
	struct rt6_info *rt = (struct rt6_info *)skb_dst(skb);

	mrt = ip6mr_get_table(net, RT6_TABLE_DFLT);
	if (!mrt)
		return -ENOENT;

	read_lock(&mrt_lock);
	cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr);
	if (!cache && skb->dev) {
		int vif = ip6mr_find_vif(mrt, skb->dev);

		if (vif >= 0)
			cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr,
						     vif);
	}

	if (!cache) {
		struct sk_buff *skb2;
		struct ipv6hdr *iph;
		struct net_device *dev;
		int vif;

		dev = skb->dev;
		if (!dev || (vif = ip6mr_find_vif(mrt, dev)) < 0) {
			read_unlock(&mrt_lock);
			return -ENODEV;
		}

		/* really correct? */
		skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC);
		if (!skb2) {
			read_unlock(&mrt_lock);
			return -ENOMEM;
		}

		NETLINK_CB(skb2).portid = portid;
		skb_reset_transport_header(skb2);

		skb_put(skb2, sizeof(struct ipv6hdr));
		skb_reset_network_header(skb2);

		iph = ipv6_hdr(skb2);
		iph->version = 0;
		iph->priority = 0;
		iph->flow_lbl[0] = 0;
		iph->flow_lbl[1] = 0;
		iph->flow_lbl[2] = 0;
		iph->payload_len = 0;
		iph->nexthdr = IPPROTO_NONE;
		iph->hop_limit = 0;
		iph->saddr = rt->rt6i_src.addr;
		iph->daddr = rt->rt6i_dst.addr;

		err = ip6mr_cache_unresolved(mrt, vif, skb2);
		read_unlock(&mrt_lock);

		return err;
	}

	if (rtm->rtm_flags & RTM_F_NOTIFY)
		cache->mfc_flags |= MFC_NOTIFY;

	err = __ip6mr_fill_mroute(mrt, skb, cache, rtm);
	read_unlock(&mrt_lock);
	return err;
}

Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 304 75.43% 1 9.09%
Nicolas Dichtel 45 11.17% 1 9.09%
Patrick McHardy 29 7.20% 4 36.36%
Nikolay Aleksandrov 11 2.73% 1 9.09%
Benjamin Thery 7 1.74% 1 9.09%
Eric Dumazet 3 0.74% 1 9.09%
Ian Morris 2 0.50% 1 9.09%
Alexey Dobriyan 2 0.50% 1 9.09%
Total 403 100.00% 11 100.00%



static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
			     u32 portid, u32 seq, struct mfc6_cache *c, int cmd,
			     int flags)
{
	struct nlmsghdr *nlh;
	struct rtmsg *rtm;
	int err;

	nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags);
	if (!nlh)
		return -EMSGSIZE;

	rtm = nlmsg_data(nlh);
	rtm->rtm_family   = RTNL_FAMILY_IP6MR;
	rtm->rtm_dst_len  = 128;
	rtm->rtm_src_len  = 128;
	rtm->rtm_tos      = 0;
	rtm->rtm_table    = mrt->id;
	if (nla_put_u32(skb, RTA_TABLE, mrt->id))
		goto nla_put_failure;
	rtm->rtm_type = RTN_MULTICAST;
	rtm->rtm_scope    = RT_SCOPE_UNIVERSE;
	if (c->mfc_flags & MFC_STATIC)
		rtm->rtm_protocol = RTPROT_STATIC;
	else
		rtm->rtm_protocol = RTPROT_MROUTED;
	rtm->rtm_flags    = 0;

	if (nla_put_in6_addr(skb, RTA_SRC, &c->mf6c_origin) ||
	    nla_put_in6_addr(skb, RTA_DST, &c->mf6c_mcastgrp))
		goto nla_put_failure;
	err = __ip6mr_fill_mroute(mrt, skb, c, rtm);
	/* do not break the dump if cache is unresolved */
	if (err < 0 && err != -ENOENT)
		goto nla_put_failure;

	nlmsg_end(skb, nlh);
	return 0;

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

Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 182 72.80% 1 9.09%
Nicolas Dichtel 46 18.40% 5 45.45%
David S. Miller 14 5.60% 1 9.09%
Johannes Berg 3 1.20% 1 9.09%
Eric W. Biedermann 2 0.80% 1 9.09%
Jiri Benc 2 0.80% 1 9.09%
Ian Morris 1 0.40% 1 9.09%
Total 250 100.00% 11 100.00%



static int mr6_msgsize(bool unresolved, int maxvif)
{
	size_t len =
		NLMSG_ALIGN(sizeof(struct rtmsg))
		+ nla_total_size(4)	/* RTA_TABLE */
		+ nla_total_size(sizeof(struct in6_addr))	/* RTA_SRC */
		+ nla_total_size(sizeof(struct in6_addr))	/* RTA_DST */
		;

	if (!unresolved)
		len = len
		      + nla_total_size(4)	/* RTA_IIF */
		      + nla_total_size(0)	/* RTA_MULTIPATH */
		      + maxvif * NLA_ALIGN(sizeof(struct rtnexthop))
						/* RTA_MFC_STATS */
		      + nla_total_size_64bit(sizeof(struct rta_mfc_stats))
		;

	return len;
}

Contributors
Person Tokens Prop Commits CommitProp
Nicolas Dichtel 95 100.00% 2 100.00%
Total 95 100.00% 2 100.00%



static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc,
			      int cmd)
{
	struct net *net = read_pnet(&mrt->net);
	struct sk_buff *skb;
	int err = -ENOBUFS;

	skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif),
			GFP_ATOMIC);
	if (!skb)
		goto errout;

	err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0);
	if (err < 0)
		goto errout;

	rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC);
	return;

errout:
	kfree_skb(skb);
	if (err < 0)
		rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err);
}

Contributors
Person Tokens Prop Commits CommitProp
Nicolas Dichtel 136 99.27% 2 66.67%
Ian Morris 1 0.73% 1 33.33%
Total 137 100.00% 3 100.00%



static size_t mrt6msg_netlink_msgsize(size_t payloadlen)
{
	size_t len =
		NLMSG_ALIGN(sizeof(struct rtgenmsg))
		+ nla_total_size(1)	/* IP6MRA_CREPORT_MSGTYPE */
		+ nla_total_size(4)	/* IP6MRA_CREPORT_MIF_ID */
					/* IP6MRA_CREPORT_SRC_ADDR */
		+ nla_total_size(sizeof(struct in6_addr))
					/* IP6MRA_CREPORT_DST_ADDR */
		+ nla_total_size(sizeof(struct in6_addr))
					/* IP6MRA_CREPORT_PKT */
		+ nla_total_size(payloadlen)
		;

	return len;
}

Contributors
Person Tokens Prop Commits CommitProp
Julien Gomes 62 100.00% 1 100.00%
Total 62 100.00% 1 100.00%



static void mrt6msg_netlink_event(struct mr6_table *mrt, struct sk_buff *pkt)
{
	struct net *net = read_pnet(&mrt->net);
	struct nlmsghdr *nlh;
	struct rtgenmsg *rtgenm;
	struct mrt6msg *msg;
	struct sk_buff *skb;
	struct nlattr *nla;
	int payloadlen;

	payloadlen = pkt->len - sizeof(struct mrt6msg);
	msg = (struct mrt6msg *)skb_transport_header(pkt);

	skb = nlmsg_new(mrt6msg_netlink_msgsize(payloadlen), GFP_ATOMIC);
	if (!skb)
		goto errout;

	nlh = nlmsg_put(skb, 0, 0, RTM_NEWCACHEREPORT,
			sizeof(struct rtgenmsg), 0);
	if (!nlh)
		goto errout;
	rtgenm = nlmsg_data(nlh);
	rtgenm->rtgen_family = RTNL_FAMILY_IP6MR;
	if (nla_put_u8(skb, IP6MRA_CREPORT_MSGTYPE, msg->im6_msgtype) ||
	    nla_put_u32(skb, IP6MRA_CREPORT_MIF_ID, msg->im6_mif) ||
	    nla_put_in6_addr(skb, IP6MRA_CREPORT_SRC_ADDR,
			     &msg->im6_src) ||
	    nla_put_in6_addr(skb, IP6MRA_CREPORT_DST_ADDR,
			     &msg->im6_dst))
		goto nla_put_failure;

	nla = nla_reserve(skb, IP6MRA_CREPORT_PKT, payloadlen);
	if (!nla || skb_copy_bits(pkt, sizeof(struct mrt6msg),
				  nla_data(nla), payloadlen))
		goto nla_put_failure;

	nlmsg_end(skb, nlh);

	rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE_R, NULL, GFP_ATOMIC);
	return;

nla_put_failure:
	nlmsg_cancel(skb, nlh);
errout:
	kfree_skb(skb);
	rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE_R, -ENOBUFS);
}

Contributors
Person Tokens Prop Commits CommitProp
Julien Gomes 280 100.00% 1 100.00%
Total 280 100.00% 1 100.00%



static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct net *net = sock_net(skb->sk);
	struct mr6_table *mrt;
	struct mfc6_cache *mfc;
	unsigned int t = 0, s_t;
	unsigned int h = 0, s_h;
	unsigned int e = 0, s_e;

	s_t = cb->args[0];
	s_h = cb->args[1];
	s_e = cb->args[2];

	read_lock(&mrt_lock);
	ip6mr_for_each_table(mrt, net) {
		if (t < s_t)
			goto next_table;
		if (t > s_t)
			s_h = 0;
		for (h = s_h; h < MFC6_LINES; h++) {
			list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) {
				if (e < s_e)
					goto next_entry;
				if (ip6mr_fill_mroute(mrt, skb,
						      NETLINK_CB(cb->skb).portid,
						      cb->nlh->nlmsg_seq,
						      mfc, RTM_NEWROUTE,
						      NLM_F_MULTI) < 0)
					goto done;
next_entry:
				e++;
			}
			e = s_e = 0;
		}
		spin_lock_bh(&mfc_unres_lock);
		list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) {
			if (e < s_e)
				goto next_entry2;
			if (ip6mr_fill_mroute(mrt, skb,
					      NETLINK_CB(cb->skb).portid,
					      cb->nlh->nlmsg_seq,
					      mfc, RTM_NEWROUTE,
					      NLM_F_MULTI) < 0) {
				spin_unlock_bh(&mfc_unres_lock);
				goto done;
			}
next_entry2:
			e++;
		}
		spin_unlock_bh(&mfc_unres_lock);
		e = s_e = 0;
		s_h = 0;
next_table:
		t++;
	}
done:
	read_unlock(&mrt_lock);

	cb->args[2] = e;
	cb->args[1] = h;
	cb->args[0] = t;

	return skb->len;
}
Contributors
Person Tokens Prop Commits CommitProp
Patrick McHardy 246 73.21% 1 20.00%
Nicolas Dichtel 89 26.49% 3 60.00%
Eric W. Biedermann 1 0.30% 1 20.00%
Total 336 100.00% 5 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Hideaki Yoshifuji / 吉藤英明 6251 50.08% 3 2.24%
Patrick McHardy 2713 21.74% 8 5.97%
Nicolas Dichtel 1211 9.70% 14 10.45%
Benjamin Thery 572 4.58% 11 8.21%
David S. Miller 467 3.74% 6 4.48%
Julien Gomes 365 2.92% 1 0.75%
Thomas Goff 159 1.27% 3 2.24%
Nikolay Aleksandrov 127 1.02% 8 5.97%
Wang Chen 102 0.82% 3 2.24%
Eric Dumazet 86 0.69% 8 5.97%
Xin Long 42 0.34% 1 0.75%
Joe Perches 36 0.29% 5 3.73%
Rami Rosen 27 0.22% 4 2.99%
Hannes Frederic Sowa 26 0.21% 2 1.49%
Gao Feng 25 0.20% 2 1.49%
Eric W. Biedermann 24 0.19% 8 5.97%
Ian Morris 24 0.19% 1 0.75%
Francesco Ruggeri 20 0.16% 1 0.75%
Stephen Hemminger 20 0.16% 4 2.99%
Duan Jiong 20 0.16% 1 0.75%
Kees Cook 18 0.14% 1 0.75%
Vincent Bernat 17 0.14% 1 0.75%
Dan Carpenter 16 0.13% 2 1.49%
Ben Greear 14 0.11% 2 1.49%
Thomas Graf 9 0.07% 1 0.75%
Pavel Emelyanov 9 0.07% 1 0.75%
Li RongQing 9 0.07% 1 0.75%
David Ahern 8 0.06% 1 0.75%
Alexey Dobriyan 7 0.06% 2 1.49%
Richard Laing 6 0.05% 1 0.75%
Américo Wang 5 0.04% 3 2.24%
Hong Zhi Guo 5 0.04% 1 0.75%
Julian Anastasov 3 0.02% 1 0.75%
Paul Gortmaker 3 0.02% 1 0.75%
Tejun Heo 3 0.02% 1 0.75%
Cong Wang 3 0.02% 1 0.75%
Dave Jones 3 0.02% 1 0.75%
Ilpo Järvinen 3 0.02% 1 0.75%
Johannes Berg 3 0.02% 1 0.75%
Jiri Pirko 3 0.02% 1 0.75%
Jiri Benc 2 0.02% 1 0.75%
Harvey Harrison 2 0.02% 1 0.75%
Tom Gundersen 2 0.02% 1 0.75%
James Morris 1 0.01% 1 0.75%
Changli Gao 1 0.01% 1 0.75%
Florian Westphal 1 0.01% 1 0.75%
Gustavo A. R. Silva 1 0.01% 1 0.75%
Linus Torvalds 1 0.01% 1 0.75%
Denis V. Lunev 1 0.01% 1 0.75%
Andi Kleen 1 0.01% 1 0.75%
Greg Rose 1 0.01% 1 0.75%
Al Viro 1 0.01% 1 0.75%
Cesar Eduardo Barros 1 0.01% 1 0.75%
Jan Engelhardt 1 0.01% 1 0.75%
Fabian Frederick 1 0.01% 1 0.75%
Total 12482 100.00% 134 100.00%
Directory: net/ipv6

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Patrick McHardy	43	100.00%	1	100.00%
Total	43	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.15 net/ipv6/ip6mr.c

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