blob: ee5a7065aaccec7fa690af1c72a5785b94e6d6aa [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C)2003,2004 USAGI/WIDE Project
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09008 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +090013 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Authors Mitsuru KANDA <mk@linux-ipv6.org>
19 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
20 *
21 * Based on net/ipv4/xfrm4_tunnel.c
22 *
23 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/module.h>
25#include <linux/xfrm.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Eric Dumazet91cc3bb2009-10-23 18:19:19 +000027#include <linux/rculist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <net/ip.h>
29#include <net/xfrm.h>
30#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/ipv6.h>
32#include <linux/icmpv6.h>
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080033#include <linux/mutex.h>
Alexey Dobriyana1664772010-01-25 10:37:54 +000034#include <net/netns/generic.h>
35
36#define XFRM6_TUNNEL_SPI_BYADDR_HSIZE 256
37#define XFRM6_TUNNEL_SPI_BYSPI_HSIZE 256
38
39#define XFRM6_TUNNEL_SPI_MIN 1
40#define XFRM6_TUNNEL_SPI_MAX 0xffffffff
41
42struct xfrm6_tunnel_net {
43 struct hlist_head spi_byaddr[XFRM6_TUNNEL_SPI_BYADDR_HSIZE];
44 struct hlist_head spi_byspi[XFRM6_TUNNEL_SPI_BYSPI_HSIZE];
45 u32 spi;
46};
47
48static int xfrm6_tunnel_net_id __read_mostly;
49static inline struct xfrm6_tunnel_net *xfrm6_tunnel_pernet(struct net *net)
50{
51 return net_generic(net, xfrm6_tunnel_net_id);
52}
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Linus Torvalds1da177e2005-04-16 15:20:36 -070054/*
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +090055 * xfrm_tunnel_spi things are for allocating unique id ("spi")
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 * per xfrm_address_t.
57 */
58struct xfrm6_tunnel_spi {
Eric Dumazet91cc3bb2009-10-23 18:19:19 +000059 struct hlist_node list_byaddr;
60 struct hlist_node list_byspi;
61 xfrm_address_t addr;
62 u32 spi;
63 atomic_t refcnt;
64 struct rcu_head rcu_head;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065};
66
Eric Dumazet91cc3bb2009-10-23 18:19:19 +000067static DEFINE_SPINLOCK(xfrm6_tunnel_spi_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Christoph Lametere18b8902006-12-06 20:33:20 -080069static struct kmem_cache *xfrm6_tunnel_spi_kmem __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Eric Dumazet95c96172012-04-15 05:58:06 +000071static inline unsigned int xfrm6_tunnel_spi_hash_byaddr(const xfrm_address_t *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Eric Dumazet95c96172012-04-15 05:58:06 +000073 unsigned int h;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
Al Viro8c689a62006-11-08 00:20:21 -080075 h = (__force u32)(addr->a6[0] ^ addr->a6[1] ^ addr->a6[2] ^ addr->a6[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 h ^= h >> 16;
77 h ^= h >> 8;
78 h &= XFRM6_TUNNEL_SPI_BYADDR_HSIZE - 1;
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 return h;
81}
82
Eric Dumazet95c96172012-04-15 05:58:06 +000083static inline unsigned int xfrm6_tunnel_spi_hash_byspi(u32 spi)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084{
85 return spi % XFRM6_TUNNEL_SPI_BYSPI_HSIZE;
86}
87
Eric Dumazetb71d1d42011-04-22 04:53:02 +000088static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
Alexey Dobriyana1664772010-01-25 10:37:54 +000090 struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 struct xfrm6_tunnel_spi *x6spi;
92 struct hlist_node *pos;
93
Eric Dumazet91cc3bb2009-10-23 18:19:19 +000094 hlist_for_each_entry_rcu(x6spi, pos,
Alexey Dobriyana1664772010-01-25 10:37:54 +000095 &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 list_byaddr) {
David S. Millera922ba52006-07-24 13:49:06 -070097 if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 return x6spi;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 }
100
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 return NULL;
102}
103
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000104__be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105{
106 struct xfrm6_tunnel_spi *x6spi;
107 u32 spi;
108
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000109 rcu_read_lock_bh();
Alexey Dobriyana1664772010-01-25 10:37:54 +0000110 x6spi = __xfrm6_tunnel_spi_lookup(net, saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 spi = x6spi ? x6spi->spi : 0;
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000112 rcu_read_unlock_bh();
Al Viro5b122542006-11-01 15:28:58 -0800113 return htonl(spi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114}
115
116EXPORT_SYMBOL(xfrm6_tunnel_spi_lookup);
117
Alexey Dobriyana1664772010-01-25 10:37:54 +0000118static int __xfrm6_tunnel_spi_check(struct net *net, u32 spi)
YOSHIFUJI Hideakidf8ea192008-02-19 22:54:00 +0900119{
Alexey Dobriyana1664772010-01-25 10:37:54 +0000120 struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
YOSHIFUJI Hideakidf8ea192008-02-19 22:54:00 +0900121 struct xfrm6_tunnel_spi *x6spi;
122 int index = xfrm6_tunnel_spi_hash_byspi(spi);
123 struct hlist_node *pos;
124
125 hlist_for_each_entry(x6spi, pos,
Alexey Dobriyana1664772010-01-25 10:37:54 +0000126 &xfrm6_tn->spi_byspi[index],
YOSHIFUJI Hideakidf8ea192008-02-19 22:54:00 +0900127 list_byspi) {
128 if (x6spi->spi == spi)
129 return -1;
130 }
131 return index;
132}
133
Alexey Dobriyana1664772010-01-25 10:37:54 +0000134static u32 __xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
Alexey Dobriyana1664772010-01-25 10:37:54 +0000136 struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 u32 spi;
138 struct xfrm6_tunnel_spi *x6spi;
YOSHIFUJI Hideakidf8ea192008-02-19 22:54:00 +0900139 int index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Alexey Dobriyana1664772010-01-25 10:37:54 +0000141 if (xfrm6_tn->spi < XFRM6_TUNNEL_SPI_MIN ||
142 xfrm6_tn->spi >= XFRM6_TUNNEL_SPI_MAX)
143 xfrm6_tn->spi = XFRM6_TUNNEL_SPI_MIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 else
Alexey Dobriyana1664772010-01-25 10:37:54 +0000145 xfrm6_tn->spi++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
Alexey Dobriyana1664772010-01-25 10:37:54 +0000147 for (spi = xfrm6_tn->spi; spi <= XFRM6_TUNNEL_SPI_MAX; spi++) {
148 index = __xfrm6_tunnel_spi_check(net, spi);
YOSHIFUJI Hideakidf8ea192008-02-19 22:54:00 +0900149 if (index >= 0)
150 goto alloc_spi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 }
Alexey Dobriyana1664772010-01-25 10:37:54 +0000152 for (spi = XFRM6_TUNNEL_SPI_MIN; spi < xfrm6_tn->spi; spi++) {
153 index = __xfrm6_tunnel_spi_check(net, spi);
YOSHIFUJI Hideakidf8ea192008-02-19 22:54:00 +0900154 if (index >= 0)
155 goto alloc_spi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 }
157 spi = 0;
158 goto out;
159alloc_spi:
Alexey Dobriyana1664772010-01-25 10:37:54 +0000160 xfrm6_tn->spi = spi;
Christoph Lameter54e6ecb2006-12-06 20:33:16 -0800161 x6spi = kmem_cache_alloc(xfrm6_tunnel_spi_kmem, GFP_ATOMIC);
David S. Millera922ba52006-07-24 13:49:06 -0700162 if (!x6spi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 goto out;
David S. Millera922ba52006-07-24 13:49:06 -0700164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 memcpy(&x6spi->addr, saddr, sizeof(x6spi->addr));
166 x6spi->spi = spi;
167 atomic_set(&x6spi->refcnt, 1);
168
Alexey Dobriyana1664772010-01-25 10:37:54 +0000169 hlist_add_head_rcu(&x6spi->list_byspi, &xfrm6_tn->spi_byspi[index]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 index = xfrm6_tunnel_spi_hash_byaddr(saddr);
Alexey Dobriyana1664772010-01-25 10:37:54 +0000172 hlist_add_head_rcu(&x6spi->list_byaddr, &xfrm6_tn->spi_byaddr[index]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 return spi;
175}
176
Alexey Dobriyana1664772010-01-25 10:37:54 +0000177__be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178{
179 struct xfrm6_tunnel_spi *x6spi;
180 u32 spi;
181
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000182 spin_lock_bh(&xfrm6_tunnel_spi_lock);
Alexey Dobriyana1664772010-01-25 10:37:54 +0000183 x6spi = __xfrm6_tunnel_spi_lookup(net, saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 if (x6spi) {
185 atomic_inc(&x6spi->refcnt);
186 spi = x6spi->spi;
187 } else
Alexey Dobriyana1664772010-01-25 10:37:54 +0000188 spi = __xfrm6_tunnel_alloc_spi(net, saddr);
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000189 spin_unlock_bh(&xfrm6_tunnel_spi_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
Al Viro5b122542006-11-01 15:28:58 -0800191 return htonl(spi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192}
193
194EXPORT_SYMBOL(xfrm6_tunnel_alloc_spi);
195
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000196static void x6spi_destroy_rcu(struct rcu_head *head)
197{
198 kmem_cache_free(xfrm6_tunnel_spi_kmem,
199 container_of(head, struct xfrm6_tunnel_spi, rcu_head));
200}
201
stephen hemminger6f747ac2010-10-15 05:15:59 +0000202static void xfrm6_tunnel_free_spi(struct net *net, xfrm_address_t *saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203{
Alexey Dobriyana1664772010-01-25 10:37:54 +0000204 struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 struct xfrm6_tunnel_spi *x6spi;
206 struct hlist_node *pos, *n;
207
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000208 spin_lock_bh(&xfrm6_tunnel_spi_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900210 hlist_for_each_entry_safe(x6spi, pos, n,
Alexey Dobriyana1664772010-01-25 10:37:54 +0000211 &xfrm6_tn->spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)],
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 list_byaddr)
213 {
214 if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 if (atomic_dec_and_test(&x6spi->refcnt)) {
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000216 hlist_del_rcu(&x6spi->list_byaddr);
217 hlist_del_rcu(&x6spi->list_byspi);
218 call_rcu(&x6spi->rcu_head, x6spi_destroy_rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 break;
220 }
221 }
222 }
Eric Dumazet91cc3bb2009-10-23 18:19:19 +0000223 spin_unlock_bh(&xfrm6_tunnel_spi_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
227{
Herbert Xu7b277b12007-10-10 15:44:06 -0700228 skb_push(skb, -skb_network_offset(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return 0;
230}
231
Herbert Xue6956332006-04-01 00:52:46 -0800232static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233{
Herbert Xu04663d02007-10-17 21:28:06 -0700234 return skb_network_header(skb)[IP6CB(skb)->nhoff];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
Herbert Xud2acc342006-03-28 01:12:13 -0800237static int xfrm6_tunnel_rcv(struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238{
Alexey Dobriyana1664772010-01-25 10:37:54 +0000239 struct net *net = dev_net(skb->dev);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000240 const struct ipv6hdr *iph = ipv6_hdr(skb);
Al Viroa252cc22006-09-27 18:48:18 -0700241 __be32 spi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000243 spi = xfrm6_tunnel_spi_lookup(net, (const xfrm_address_t *)&iph->saddr);
David S. Miller6ac3f662011-05-24 01:11:51 -0400244 return xfrm6_rcv_spi(skb, IPPROTO_IPV6, spi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245}
246
Herbert Xud2acc342006-03-28 01:12:13 -0800247static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
Brian Haleyd5fdd6b2009-06-23 04:31:07 -0700248 u8 type, u8 code, int offset, __be32 info)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 /* xfrm6_tunnel native err handling */
251 switch (type) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900252 case ICMPV6_DEST_UNREACH:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 switch (code) {
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900254 case ICMPV6_NOROUTE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 case ICMPV6_ADM_PROHIBITED:
256 case ICMPV6_NOT_NEIGHBOUR:
257 case ICMPV6_ADDR_UNREACH:
258 case ICMPV6_PORT_UNREACH:
259 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 break;
261 }
262 break;
263 case ICMPV6_PKT_TOOBIG:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 break;
265 case ICMPV6_TIME_EXCEED:
266 switch (code) {
267 case ICMPV6_EXC_HOPLIMIT:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 break;
269 case ICMPV6_EXC_FRAGTIME:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900270 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 break;
272 }
273 break;
274 case ICMPV6_PARAMPROB:
275 switch (code) {
276 case ICMPV6_HDR_FIELD: break;
277 case ICMPV6_UNK_NEXTHDR: break;
278 case ICMPV6_UNK_OPTION: break;
279 }
280 break;
281 default:
282 break;
283 }
Herbert Xud2acc342006-03-28 01:12:13 -0800284
285 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286}
287
Herbert Xu72cb6962005-06-20 13:18:08 -0700288static int xfrm6_tunnel_init_state(struct xfrm_state *x)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
Masahide NAKAMURA7e49e6d2006-09-22 15:05:15 -0700290 if (x->props.mode != XFRM_MODE_TUNNEL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 return -EINVAL;
292
293 if (x->encap)
294 return -EINVAL;
295
296 x->props.header_len = sizeof(struct ipv6hdr);
297
298 return 0;
299}
300
301static void xfrm6_tunnel_destroy(struct xfrm_state *x)
302{
Alexey Dobriyana1664772010-01-25 10:37:54 +0000303 struct net *net = xs_net(x);
304
305 xfrm6_tunnel_free_spi(net, (xfrm_address_t *)&x->props.saddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306}
307
Eric Dumazet533cb5b2008-01-30 19:11:50 -0800308static const struct xfrm_type xfrm6_tunnel_type = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 .description = "IP6IP6",
310 .owner = THIS_MODULE,
311 .proto = IPPROTO_IPV6,
312 .init_state = xfrm6_tunnel_init_state,
313 .destructor = xfrm6_tunnel_destroy,
314 .input = xfrm6_tunnel_input,
315 .output = xfrm6_tunnel_output,
316};
317
Eric Dumazet3ff2cfa2010-08-30 10:27:10 +0000318static struct xfrm6_tunnel xfrm6_tunnel_handler __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 .handler = xfrm6_tunnel_rcv,
Herbert Xud2acc342006-03-28 01:12:13 -0800320 .err_handler = xfrm6_tunnel_err,
321 .priority = 2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322};
323
Eric Dumazet3ff2cfa2010-08-30 10:27:10 +0000324static struct xfrm6_tunnel xfrm46_tunnel_handler __read_mostly = {
Kazunori MIYAZAWA73d605d2007-02-13 12:55:55 -0800325 .handler = xfrm6_tunnel_rcv,
326 .err_handler = xfrm6_tunnel_err,
327 .priority = 2,
328};
329
Alexey Dobriyana1664772010-01-25 10:37:54 +0000330static int __net_init xfrm6_tunnel_net_init(struct net *net)
331{
332 struct xfrm6_tunnel_net *xfrm6_tn = xfrm6_tunnel_pernet(net);
333 unsigned int i;
334
335 for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++)
336 INIT_HLIST_HEAD(&xfrm6_tn->spi_byaddr[i]);
337 for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++)
338 INIT_HLIST_HEAD(&xfrm6_tn->spi_byspi[i]);
339 xfrm6_tn->spi = 0;
340
341 return 0;
342}
343
344static void __net_exit xfrm6_tunnel_net_exit(struct net *net)
345{
346}
347
348static struct pernet_operations xfrm6_tunnel_net_ops = {
349 .init = xfrm6_tunnel_net_init,
350 .exit = xfrm6_tunnel_net_exit,
351 .id = &xfrm6_tunnel_net_id,
352 .size = sizeof(struct xfrm6_tunnel_net),
353};
354
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355static int __init xfrm6_tunnel_init(void)
356{
Alexey Dobriyane9249602010-01-25 10:28:21 +0000357 int rv;
358
Alexey Dobriyand5aa4072010-02-16 09:05:04 +0000359 xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi",
360 sizeof(struct xfrm6_tunnel_spi),
361 0, SLAB_HWCACHE_ALIGN,
362 NULL);
363 if (!xfrm6_tunnel_spi_kmem)
364 return -ENOMEM;
Alexey Dobriyana1664772010-01-25 10:37:54 +0000365 rv = register_pernet_subsys(&xfrm6_tunnel_net_ops);
366 if (rv < 0)
Alexey Dobriyand5aa4072010-02-16 09:05:04 +0000367 goto out_pernet;
368 rv = xfrm_register_type(&xfrm6_tunnel_type, AF_INET6);
369 if (rv < 0)
370 goto out_type;
371 rv = xfrm6_tunnel_register(&xfrm6_tunnel_handler, AF_INET6);
372 if (rv < 0)
373 goto out_xfrm6;
374 rv = xfrm6_tunnel_register(&xfrm46_tunnel_handler, AF_INET);
375 if (rv < 0)
376 goto out_xfrm46;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 return 0;
Ilpo Järvinen5ce1bbb2008-12-14 23:13:48 -0800378
Alexey Dobriyand5aa4072010-02-16 09:05:04 +0000379out_xfrm46:
Ilpo Järvinen5ce1bbb2008-12-14 23:13:48 -0800380 xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
Alexey Dobriyand5aa4072010-02-16 09:05:04 +0000381out_xfrm6:
Ilpo Järvinen5ce1bbb2008-12-14 23:13:48 -0800382 xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
Alexey Dobriyand5aa4072010-02-16 09:05:04 +0000383out_type:
384 unregister_pernet_subsys(&xfrm6_tunnel_net_ops);
385out_pernet:
386 kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
Alexey Dobriyane9249602010-01-25 10:28:21 +0000387 return rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388}
389
390static void __exit xfrm6_tunnel_fini(void)
391{
Kazunori MIYAZAWA73d605d2007-02-13 12:55:55 -0800392 xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET);
393 xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
David S. Millera922ba52006-07-24 13:49:06 -0700394 xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
Alexey Dobriyand5aa4072010-02-16 09:05:04 +0000395 unregister_pernet_subsys(&xfrm6_tunnel_net_ops);
396 kmem_cache_destroy(xfrm6_tunnel_spi_kmem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397}
398
399module_init(xfrm6_tunnel_init);
400module_exit(xfrm6_tunnel_fini);
401MODULE_LICENSE("GPL");
Masahide NAKAMURAd3d6dd32007-06-26 23:57:49 -0700402MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_IPV6);