Release 4.11 net/ipv6/xfrm6_tunnel.c
/*
* 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 unsigned 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 | 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 / 吉藤英明 | 45 | 88.24% | 2 | 33.33% |
Eric Dumazet | 3 | 5.88% | 2 | 33.33% |
Al Viro | 2 | 3.92% | 1 | 16.67% |
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 / 吉藤英明 | 14 | 87.50% | 1 | 33.33% |
Dave Jones | 1 | 6.25% | 1 | 33.33% |
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 / 吉藤英明 | 43 | 70.49% | 2 | 40.00% |
Alexey Dobriyan | 16 | 26.23% | 1 | 20.00% |
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 / 吉藤英明 | 38 | 70.37% | 1 | 16.67% |
Alexey Dobriyan | 7 | 12.96% | 1 | 16.67% |
Eric Dumazet | 5 | 9.26% | 2 | 33.33% |
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 / 吉藤英明 | 46 | 74.19% | 1 | 50.00% |
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 / 吉藤英明 | 192 | 79.67% | 2 | 40.00% |
Alexey Dobriyan | 46 | 19.09% | 1 | 20.00% |
Eric Dumazet | 2 | 0.83% | 1 | 20.00% |
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 / 吉藤英明 | 64 | 81.01% | 1 | 20.00% |
Alexey Dobriyan | 9 | 11.39% | 1 | 20.00% |
Al Viro | 4 | 5.06% | 2 | 40.00% |
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 | 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 / 吉藤英明 | 85 | 75.89% | 2 | 40.00% |
Alexey Dobriyan | 16 | 14.29% | 1 | 20.00% |
Eric Dumazet | 10 | 8.93% | 1 | 20.00% |
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 | 18 | 60.00% | 4 | 80.00% |
Hideaki Yoshifuji / 吉藤英明 | 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 / 吉藤英明 | 18 | 60.00% | 1 | 50.00% |
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 / 吉藤英明 | 37 | 56.06% | 1 | 11.11% |
Alexey Dobriyan | 14 | 21.21% | 1 | 11.11% |
Herbert Xu | 7 | 10.61% | 3 | 33.33% |
Arnaldo Carvalho de Melo | 3 | 4.55% | 1 | 11.11% |
Eric Dumazet | 2 | 3.03% | 1 | 11.11% |
Nicolas Dichtel | 2 | 3.03% | 1 | 11.11% |
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 / 吉藤英明 | 105 | 93.75% | 1 | 25.00% |
Herbert Xu | 4 | 3.57% | 1 | 25.00% |
Brian Haley | 2 | 1.79% | 1 | 25.00% |
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 / 吉藤英明 | 38 | 76.00% | 1 | 33.33% |
Herbert Xu | 10 | 20.00% | 1 | 33.33% |
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 / 吉藤英明 | 25 | 67.57% | 1 | 50.00% |
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 | 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 | 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 | 99 | 63.87% | 3 | 37.50% |
Hideaki Yoshifuji / 吉藤英明 | 26 | 16.77% | 1 | 12.50% |
Ilpo Järvinen | 13 | 8.39% | 1 | 12.50% |
Kazunori Miyazawa | 12 | 7.74% | 1 | 12.50% |
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 / 吉藤英明 | 20 | 45.45% | 1 | 20.00% |
Alexey Dobriyan | 11 | 25.00% | 1 | 20.00% |
Kazunori Miyazawa | 10 | 22.73% | 1 | 20.00% |
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 / 吉藤英明 | 919 | 56.97% | 5 | 10.87% |
Alexey Dobriyan | 441 | 27.34% | 4 | 8.70% |
Herbert Xu | 79 | 4.90% | 11 | 23.91% |
Eric Dumazet | 63 | 3.91% | 6 | 13.04% |
Kazunori Miyazawa | 44 | 2.73% | 1 | 2.17% |
Ilpo Järvinen | 13 | 0.81% | 1 | 2.17% |
Al Viro | 12 | 0.74% | 4 | 8.70% |
David S. Miller | 10 | 0.62% | 1 | 2.17% |
Masahide Nakamura | 9 | 0.56% | 2 | 4.35% |
Arjan van de Ven | 3 | 0.19% | 1 | 2.17% |
Arnaldo Carvalho de Melo | 3 | 0.19% | 1 | 2.17% |
Christoph Lameter | 3 | 0.19% | 2 | 4.35% |
Thomas Gleixner | 3 | 0.19% | 1 | 2.17% |
Tejun Heo | 3 | 0.19% | 1 | 2.17% |
Dave Jones | 2 | 0.12% | 1 | 2.17% |
Brian Haley | 2 | 0.12% | 1 | 2.17% |
Nicolas Dichtel | 2 | 0.12% | 1 | 2.17% |
Stephen Hemminger | 1 | 0.06% | 1 | 2.17% |
Ian Morris | 1 | 0.06% | 1 | 2.17% |
Total | 1613 | 100.00% | 46 | 100.00% |
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