Release 4.8 net/ipv6/xfrm6_tunnel.c

Directory: net/ipv6
/*
 * Copyright (C)2003,2004 USAGI/WIDE Project
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 * Authors      Mitsuru KANDA  <mk@linux-ipv6.org>
 *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
 *
 * Based on net/ipv4/xfrm4_tunnel.c
 *
 */
#include <linux/module.h>
#include <linux/xfrm.h>
#include <linux/slab.h>
#include <linux/rculist.h>
#include <net/ip.h>
#include <net/xfrm.h>
#include <net/ipv6.h>
#include <linux/ipv6.h>
#include <linux/icmpv6.h>
#include <linux/mutex.h>
#include <net/netns/generic.h>


#define XFRM6_TUNNEL_SPI_BYADDR_HSIZE 256

#define XFRM6_TUNNEL_SPI_BYSPI_HSIZE 256


#define XFRM6_TUNNEL_SPI_MIN	1

#define XFRM6_TUNNEL_SPI_MAX	0xffffffff


struct xfrm6_tunnel_net {
	
struct hlist_head spi_byaddr[XFRM6_TUNNEL_SPI_BYADDR_HSIZE];
	
struct hlist_head spi_byspi[XFRM6_TUNNEL_SPI_BYSPI_HSIZE];
	
u32 spi;
};


static int xfrm6_tunnel_net_id __read_mostly;


static inline struct xfrm6_tunnel_net *xfrm6_tunnel_pernet(struct net *net)
{
	return net_generic(net, xfrm6_tunnel_net_id);
}

Contributors
Person Tokens Prop Commits CommitProp
alexey dobriyan alexey dobriyan 22 100.00% 1 100.00%
Total 22 100.00% 1 100.00%

/*
 * xfrm_tunnel_spi things are for allocating unique id ("spi")
 * per xfrm_address_t.
 */

struct xfrm6_tunnel_spi {
	
struct hlist_node	list_byaddr;
	
struct hlist_node	list_byspi;
	
xfrm_address_t		addr;
	
u32			spi;
	
atomic_t		refcnt;
	
struct rcu_head		rcu_head;
};

static DEFINE_SPINLOCK(xfrm6_tunnel_spi_lock);


static struct kmem_cache *xfrm6_tunnel_spi_kmem __read_mostly;



static inline unsigned int xfrm6_tunnel_spi_hash_byaddr(const xfrm_address_t *addr)
{
	unsigned int h;

	h = ipv6_addr_hash((const struct in6_addr *)addr);
	h ^= h >> 16;
	h ^= h >> 8;
	h &= XFRM6_TUNNEL_SPI_BYADDR_HSIZE - 1;

	return h;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 45 88.24% 2 33.33%
eric dumazet eric dumazet 3 5.88% 2 33.33%
al viro al viro 2 3.92% 1 16.67%
dave jones dave jones 1 1.96% 1 16.67%
Total 51 100.00% 6 100.00%



static inline unsigned int xfrm6_tunnel_spi_hash_byspi(u32 spi)
{
	return spi % XFRM6_TUNNEL_SPI_BYSPI_HSIZE;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 14 87.50% 1 33.33%
dave jones dave jones 1 6.25% 1 33.33%
eric dumazet eric dumazet 1 6.25% 1 33.33%
Total 16 100.00% 3 100.00%



static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	struct xfrm6_tunnel_spi *x6spi;

	hlist_for_each_entry_rcu(x6spi,
			     &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
			     list_byaddr) {
		if (xfrm6_addr_equal(&x6spi->addr, saddr))
			return x6spi;
	}

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 43 70.49% 2 40.00%
alexey dobriyan alexey dobriyan 16 26.23% 1 20.00%
eric dumazet eric dumazet 2 3.28% 2 40.00%
Total 61 100.00% 5 100.00%



__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_spi *x6spi;
	u32 spi;

	rcu_read_lock_bh();
	x6spi = __xfrm6_tunnel_spi_lookup(net, saddr);
	spi = x6spi ? x6spi->spi : 0;
	rcu_read_unlock_bh();
	return htonl(spi);
}
Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 38 70.37% 1 16.67%
alexey dobriyan alexey dobriyan 7 12.96% 1 16.67%
eric dumazet eric dumazet 5 9.26% 2 33.33%
al viro al viro 4 7.41% 2 33.33%
Total 54 100.00% 6 100.00%


EXPORT_SYMBOL(xfrm6_tunnel_spi_lookup);



static int __xfrm6_tunnel_spi_check(struct net *net, u32 spi)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	struct xfrm6_tunnel_spi *x6spi;
	int index = xfrm6_tunnel_spi_hash_byspi(spi);

	hlist_for_each_entry(x6spi,
			     &xfrm6_tn->spi_byspi[index],
			     list_byspi) {
		if (x6spi->spi == spi)
			return -1;
	}
	return index;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 46 74.19% 1 50.00%
alexey dobriyan alexey dobriyan 16 25.81% 1 50.00%
Total 62 100.00% 2 100.00%



static u32 __xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	u32 spi;
	struct xfrm6_tunnel_spi *x6spi;
	int index;

	if (xfrm6_tn->spi < XFRM6_TUNNEL_SPI_MIN ||
	    xfrm6_tn->spi >= XFRM6_TUNNEL_SPI_MAX)
		xfrm6_tn->spi = XFRM6_TUNNEL_SPI_MIN;
	else
		xfrm6_tn->spi++;

	for (spi = xfrm6_tn->spi; spi <= XFRM6_TUNNEL_SPI_MAX; spi++) {
		index = __xfrm6_tunnel_spi_check(net, spi);
		if (index >= 0)
			goto alloc_spi;
	}
	for (spi = XFRM6_TUNNEL_SPI_MIN; spi < xfrm6_tn->spi; spi++) {
		index = __xfrm6_tunnel_spi_check(net, spi);
		if (index >= 0)
			goto alloc_spi;
	}
	spi = 0;
	goto out;
alloc_spi:
	xfrm6_tn->spi = spi;
	x6spi = kmem_cache_alloc(xfrm6_tunnel_spi_kmem, GFP_ATOMIC);
	if (!x6spi)
		goto out;

	memcpy(&x6spi->addr, saddr, sizeof(x6spi->addr));
	x6spi->spi = spi;
	atomic_set(&x6spi->refcnt, 1);

	hlist_add_head_rcu(&x6spi->list_byspi, &xfrm6_tn->spi_byspi[index]);

	index = xfrm6_tunnel_spi_hash_byaddr(saddr);
	hlist_add_head_rcu(&x6spi->list_byaddr, &xfrm6_tn->spi_byaddr[index]);
out:
	return spi;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 192 79.67% 2 40.00%
alexey dobriyan alexey dobriyan 46 19.09% 1 20.00%
eric dumazet eric dumazet 2 0.83% 1 20.00%
christoph lameter christoph lameter 1 0.41% 1 20.00%
Total 241 100.00% 5 100.00%



__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_spi *x6spi;
	u32 spi;

	spin_lock_bh(&xfrm6_tunnel_spi_lock);
	x6spi = __xfrm6_tunnel_spi_lookup(net, saddr);
	if (x6spi) {
		atomic_inc(&x6spi->refcnt);
		spi = x6spi->spi;
	} else
		spi = __xfrm6_tunnel_alloc_spi(net, saddr);
	spin_unlock_bh(&xfrm6_tunnel_spi_lock);

	return htonl(spi);
}
Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 64 81.01% 1 20.00%
alexey dobriyan alexey dobriyan 9 11.39% 1 20.00%
al viro al viro 4 5.06% 2 40.00%
eric dumazet eric dumazet 2 2.53% 1 20.00%
Total 79 100.00% 5 100.00%


EXPORT_SYMBOL(xfrm6_tunnel_alloc_spi);



static void x6spi_destroy_rcu(struct rcu_head *head)
{
	kmem_cache_free(xfrm6_tunnel_spi_kmem,
			container_of(head, struct xfrm6_tunnel_spi, rcu_head));
}

Contributors
Person Tokens Prop Commits CommitProp
eric dumazet eric dumazet 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



static void xfrm6_tunnel_free_spi(struct net *net, xfrm_address_t *saddr)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	struct xfrm6_tunnel_spi *x6spi;
	struct hlist_node *n;

	spin_lock_bh(&xfrm6_tunnel_spi_lock);

	hlist_for_each_entry_safe(x6spi, n,
				  &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
				  list_byaddr)
	{
		if (xfrm6_addr_equal(&x6spi->addr, saddr)) {
			if (atomic_dec_and_test(&x6spi->refcnt)) {
				hlist_del_rcu(&x6spi->list_byaddr);
				hlist_del_rcu(&x6spi->list_byspi);
				call_rcu(&x6spi->rcu_head, x6spi_destroy_rcu);
				break;
			}
		}
	}
	spin_unlock_bh(&xfrm6_tunnel_spi_lock);
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 85 75.89% 2 40.00%
alexey dobriyan alexey dobriyan 16 14.29% 1 20.00%
eric dumazet eric dumazet 10 8.93% 1 20.00%
stephen hemminger stephen hemminger 1 0.89% 1 20.00%
Total 112 100.00% 5 100.00%



static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
{
	skb_push(skb, -skb_network_offset(skb));
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
herbert xu herbert xu 18 60.00% 4 80.00%
hideaki yoshifuji hideaki yoshifuji 12 40.00% 1 20.00%
Total 30 100.00% 5 100.00%



static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
{
	return skb_network_header(skb)[IP6CB(skb)->nhoff];
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 18 60.00% 1 50.00%
herbert xu herbert xu 12 40.00% 1 50.00%
Total 30 100.00% 2 100.00%



static int xfrm6_tunnel_rcv(struct sk_buff *skb)
{
	struct net *net = dev_net(skb->dev);
	const struct ipv6hdr *iph = ipv6_hdr(skb);
	__be32 spi;

	spi = xfrm6_tunnel_spi_lookup(net, (const xfrm_address_t *)&iph->saddr);
	return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi, NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 37 56.06% 1 11.11%
alexey dobriyan alexey dobriyan 14 21.21% 1 11.11%
herbert xu herbert xu 7 10.61% 3 33.33%
arnaldo carvalho de melo arnaldo carvalho de melo 3 4.55% 1 11.11%
nicolas dichtel nicolas dichtel 2 3.03% 1 11.11%
eric dumazet eric dumazet 2 3.03% 1 11.11%
al viro al viro 1 1.52% 1 11.11%
Total 66 100.00% 9 100.00%



static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
			    u8 type, u8 code, int offset, __be32 info)
{
	/* xfrm6_tunnel native err handling */
	switch (type) {
	case ICMPV6_DEST_UNREACH:
		switch (code) {
		case ICMPV6_NOROUTE:
		case ICMPV6_ADM_PROHIBITED:
		case ICMPV6_NOT_NEIGHBOUR:
		case ICMPV6_ADDR_UNREACH:
		case ICMPV6_PORT_UNREACH:
		default:
			break;
		}
		break;
	case ICMPV6_PKT_TOOBIG:
		break;
	case ICMPV6_TIME_EXCEED:
		switch (code) {
		case ICMPV6_EXC_HOPLIMIT:
			break;
		case ICMPV6_EXC_FRAGTIME:
		default:
			break;
		}
		break;
	case ICMPV6_PARAMPROB:
		switch (code) {
		case ICMPV6_HDR_FIELD: break;
		case ICMPV6_UNK_NEXTHDR: break;
		case ICMPV6_UNK_OPTION: break;
		}
		break;
	default:
		break;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 105 93.75% 1 25.00%
herbert xu herbert xu 4 3.57% 1 25.00%
brian haley brian haley 2 1.79% 1 25.00%
al viro al viro 1 0.89% 1 25.00%
Total 112 100.00% 4 100.00%



static int xfrm6_tunnel_init_state(struct xfrm_state *x)
{
	if (x->props.mode != XFRM_MODE_TUNNEL)
		return -EINVAL;

	if (x->encap)
		return -EINVAL;

	x->props.header_len = sizeof(struct ipv6hdr);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 38 76.00% 1 33.33%
herbert xu herbert xu 10 20.00% 1 33.33%
masahide nakamura masahide nakamura 2 4.00% 1 33.33%
Total 50 100.00% 3 100.00%



static void xfrm6_tunnel_destroy(struct xfrm_state *x)
{
	struct net *net = xs_net(x);

	xfrm6_tunnel_free_spi(net, (xfrm_address_t *)&x->props.saddr);
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 25 67.57% 1 50.00%
alexey dobriyan alexey dobriyan 12 32.43% 1 50.00%
Total 37 100.00% 2 100.00%


static const struct xfrm_type xfrm6_tunnel_type = {
	.description	= "IP6IP6",
	.owner          = THIS_MODULE,
	.proto		= IPPROTO_IPV6,
	.init_state	= xfrm6_tunnel_init_state,
	.destructor	= xfrm6_tunnel_destroy,
	.input		= xfrm6_tunnel_input,
	.output		= xfrm6_tunnel_output,
};


static struct xfrm6_tunnel xfrm6_tunnel_handler __read_mostly = {
	.handler	= xfrm6_tunnel_rcv,
	.err_handler	= xfrm6_tunnel_err,
	.priority	= 2,
};


static struct xfrm6_tunnel xfrm46_tunnel_handler __read_mostly = {
	.handler	= xfrm6_tunnel_rcv,
	.err_handler	= xfrm6_tunnel_err,
	.priority	= 2,
};



static int __net_init xfrm6_tunnel_net_init(struct net *net)
{
	struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
	unsigned int i;

	for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++)
		INIT_HLIST_HEAD(&xfrm6_tn->spi_byaddr[i]);
	for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++)
		INIT_HLIST_HEAD(&xfrm6_tn->spi_byspi[i]);
	xfrm6_tn->spi = 0;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
alexey dobriyan alexey dobriyan 83 100.00% 1 100.00%
Total 83 100.00% 1 100.00%



static void __net_exit xfrm6_tunnel_net_exit(struct net *net)
{
}

Contributors
Person Tokens Prop Commits CommitProp
alexey dobriyan alexey dobriyan 11 100.00% 1 100.00%
Total 11 100.00% 1 100.00%


static struct pernet_operations xfrm6_tunnel_net_ops = {
	.init	= xfrm6_tunnel_net_init,
	.exit	= xfrm6_tunnel_net_exit,
	.id	= &xfrm6_tunnel_net_id,
	.size	= sizeof(struct xfrm6_tunnel_net),
};



static int __init xfrm6_tunnel_init(void)
{
	int rv;

	xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi",
						  sizeof(struct xfrm6_tunnel_spi),
						  0, SLAB_HWCACHE_ALIGN,
						  NULL);
	if (!xfrm6_tunnel_spi_kmem)
		return -ENOMEM;
	rv = register_pernet_subsys(&xfrm6_tunnel_net_ops);
	if (rv < 0)
		goto out_pernet;
	rv = xfrm_register_type(&xfrm6_tunnel_type, AF_INET6);
	if (rv < 0)
		goto out_type;
	rv = xfrm6_tunnel_register(&xfrm6_tunnel_handler, AF_INET6);
	if (rv < 0)
		goto out_xfrm6;
	rv = xfrm6_tunnel_register(&xfrm46_tunnel_handler, AF_INET);
	if (rv < 0)
		goto out_xfrm46;
	return 0;

out_xfrm46:
	xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
out_xfrm6:
	xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
out_type:
	unregister_pernet_subsys(&xfrm6_tunnel_net_ops);
out_pernet:
	kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
	return rv;
}

Contributors
Person Tokens Prop Commits CommitProp
alexey dobriyan alexey dobriyan 99 63.87% 3 37.50%
hideaki yoshifuji hideaki yoshifuji 26 16.77% 1 12.50%
ilpo jarvinen ilpo jarvinen 13 8.39% 1 12.50%
kazunori miyazawa kazunori miyazawa 12 7.74% 1 12.50%
herbert xu herbert xu 5 3.23% 2 25.00%
Total 155 100.00% 8 100.00%



static void __exit xfrm6_tunnel_fini(void)
{
	xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET);
	xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
	xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
	unregister_pernet_subsys(&xfrm6_tunnel_net_ops);
	kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
}

Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 20 45.45% 1 20.00%
alexey dobriyan alexey dobriyan 11 25.00% 1 20.00%
kazunori miyazawa kazunori miyazawa 10 22.73% 1 20.00%
herbert xu herbert xu 3 6.82% 2 40.00%
Total 44 100.00% 5 100.00%


module_init(xfrm6_tunnel_init);

module_exit(xfrm6_tunnel_fini);
MODULE_LICENSE("GPL");
MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_IPV6);
Overall Contributors
Person Tokens Prop Commits CommitProp
hideaki yoshifuji hideaki yoshifuji 919 57.01% 5 11.11%
alexey dobriyan alexey dobriyan 440 27.30% 3 6.67%
herbert xu herbert xu 79 4.90% 11 24.44%
eric dumazet eric dumazet 63 3.91% 6 13.33%
kazunori miyazawa kazunori miyazawa 44 2.73% 1 2.22%
ilpo jarvinen ilpo jarvinen 13 0.81% 1 2.22%
al viro al viro 12 0.74% 4 8.89%
david s. miller david s. miller 10 0.62% 1 2.22%
masahide nakamura masahide nakamura 9 0.56% 2 4.44%
arnaldo carvalho de melo arnaldo carvalho de melo 3 0.19% 1 2.22%
arjan van de ven arjan van de ven 3 0.19% 1 2.22%
tejun heo tejun heo 3 0.19% 1 2.22%
thomas gleixner thomas gleixner 3 0.19% 1 2.22%
christoph lameter christoph lameter 3 0.19% 2 4.44%
dave jones dave jones 2 0.12% 1 2.22%
nicolas dichtel nicolas dichtel 2 0.12% 1 2.22%
brian haley brian haley 2 0.12% 1 2.22%
ian morris ian morris 1 0.06% 1 2.22%
stephen hemminger stephen hemminger 1 0.06% 1 2.22%
Total 1612 100.00% 45 100.00%
  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
alexey dobriyan	alexey dobriyan	22	100.00%	1	100.00%
	Total	22	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.8 net/ipv6/xfrm6_tunnel.c

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