blob: 5f8e128c512d664080251bf6958c89021a1110c1 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * xfrm6_policy.c: based on xfrm4_policy.c
3 *
4 * Authors:
5 * Mitsuru KANDA @USAGI
6 * Kazunori MIYAZAWA @USAGI
7 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
8 * IPv6 support
9 * YOSHIFUJI Hideaki
10 * Split up af-specific portion
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +090011 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 */
13
Herbert Xu66cdb3c2007-11-13 21:37:28 -080014#include <linux/err.h>
15#include <linux/kernel.h>
Herbert Xuaabc9762005-05-03 16:27:10 -070016#include <linux/netdevice.h>
17#include <net/addrconf.h>
Herbert Xu45ff5a32007-11-13 21:35:32 -080018#include <net/dst.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <net/xfrm.h>
20#include <net/ip.h>
21#include <net/ipv6.h>
22#include <net/ip6_route.h>
Amerigo Wang07a93622012-10-29 16:23:10 +000023#if IS_ENABLED(CONFIG_IPV6_MIP6)
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -070024#include <net/mip6.h>
25#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
Linus Torvalds1da177e2005-04-16 15:20:36 -070027static struct xfrm_policy_afinfo xfrm6_policy_afinfo;
28
Alexey Dobriyanc5b3cf42008-11-25 17:51:25 -080029static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos,
David S. Miller5e6b9302011-02-24 00:14:45 -050030 const xfrm_address_t *saddr,
31 const xfrm_address_t *daddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -070032{
David S. Miller7e1dc7b2011-03-12 02:42:11 -050033 struct flowi6 fl6;
Herbert Xu66cdb3c2007-11-13 21:37:28 -080034 struct dst_entry *dst;
35 int err;
36
David S. Miller7e1dc7b2011-03-12 02:42:11 -050037 memset(&fl6, 0, sizeof(fl6));
38 memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
Herbert Xu66cdb3c2007-11-13 21:37:28 -080039 if (saddr)
David S. Miller7e1dc7b2011-03-12 02:42:11 -050040 memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr));
Herbert Xu66cdb3c2007-11-13 21:37:28 -080041
David S. Miller4c9483b2011-03-12 16:22:43 -050042 dst = ip6_route_output(net, NULL, &fl6);
Herbert Xu66cdb3c2007-11-13 21:37:28 -080043
44 err = dst->error;
45 if (dst->error) {
Ville Nuorvala42513202006-10-16 22:10:05 -070046 dst_release(dst);
Herbert Xu66cdb3c2007-11-13 21:37:28 -080047 dst = ERR_PTR(err);
48 }
49
50 return dst;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051}
52
Alexey Dobriyanfbda33b2008-11-25 17:56:49 -080053static int xfrm6_get_saddr(struct net *net,
54 xfrm_address_t *saddr, xfrm_address_t *daddr)
Patrick McHardya1e59ab2006-09-19 12:57:34 -070055{
Herbert Xu66cdb3c2007-11-13 21:37:28 -080056 struct dst_entry *dst;
Brian Haley191cd582008-08-14 15:33:21 -070057 struct net_device *dev;
Patrick McHardya1e59ab2006-09-19 12:57:34 -070058
Alexey Dobriyanfbda33b2008-11-25 17:56:49 -080059 dst = xfrm6_dst_lookup(net, 0, NULL, daddr);
Herbert Xu66cdb3c2007-11-13 21:37:28 -080060 if (IS_ERR(dst))
61 return -EHOSTUNREACH;
62
Brian Haley191cd582008-08-14 15:33:21 -070063 dev = ip6_dst_idev(dst)->dev;
64 ipv6_dev_get_saddr(dev_net(dev), dev,
YOSHIFUJI Hideaki7cbca672008-03-25 09:37:42 +090065 (struct in6_addr *)&daddr->a6, 0,
YOSHIFUJI Hideaki5e5f3f02008-03-03 21:44:34 +090066 (struct in6_addr *)&saddr->a6);
Herbert Xu66cdb3c2007-11-13 21:37:28 -080067 dst_release(dst);
68 return 0;
Patrick McHardya1e59ab2006-09-19 12:57:34 -070069}
70
David S. Miller05d84022011-02-22 17:47:10 -080071static int xfrm6_get_tos(const struct flowi *fl)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 return 0;
Herbert Xu25ee3282007-12-11 09:32:34 -080074}
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Patrick McHardy9d7b0fc2012-08-20 02:56:56 -070076static void xfrm6_init_dst(struct net *net, struct xfrm_dst *xdst)
77{
78 struct rt6_info *rt = (struct rt6_info *)xdst;
79
80 rt6_init_peer(rt, net->ipv6.peers);
81}
82
Masahide NAKAMURAa1b05142007-12-20 20:41:12 -080083static int xfrm6_init_path(struct xfrm_dst *path, struct dst_entry *dst,
84 int nfheader_len)
85{
86 if (dst->ops->family == AF_INET6) {
87 struct rt6_info *rt = (struct rt6_info*)dst;
88 if (rt->rt6i_node)
89 path->path_cookie = rt->rt6i_node->fn_sernum;
90 }
91
92 path->u.rt6.rt6i_nfheader_len = nfheader_len;
93
94 return 0;
95}
96
Herbert Xu87c1e122010-03-02 02:51:56 +000097static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
David S. Miller0c7b3ee2011-02-22 17:48:57 -080098 const struct flowi *fl)
Herbert Xu25ee3282007-12-11 09:32:34 -080099{
100 struct rt6_info *rt = (struct rt6_info*)xdst->route;
101
102 xdst->u.dst.dev = dev;
103 dev_hold(dev);
104
Nicolas Dichtelbc8e4b92010-04-21 16:25:30 -0700105 xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
Cong Wang84c4a9d2013-05-09 22:40:00 +0000106 if (!xdst->u.rt6.rt6i_idev) {
107 dev_put(dev);
Herbert Xu25ee3282007-12-11 09:32:34 -0800108 return -ENODEV;
Cong Wang84c4a9d2013-05-09 22:40:00 +0000109 }
Herbert Xu25ee3282007-12-11 09:32:34 -0800110
David S. Miller97bab732012-06-09 22:36:36 -0700111 rt6_transfer_peer(&xdst->u.rt6, rt);
David S. Miller7cc2edb2011-01-26 13:41:03 -0800112
Herbert Xu25ee3282007-12-11 09:32:34 -0800113 /* Sheit... I remember I did this right. Apparently,
114 * it was magically lost, so this code needs audit */
115 xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
116 RTF_LOCAL);
117 xdst->u.rt6.rt6i_metric = rt->rt6i_metric;
118 xdst->u.rt6.rt6i_node = rt->rt6i_node;
Masahide NAKAMURAa1b05142007-12-20 20:41:12 -0800119 if (rt->rt6i_node)
120 xdst->route_cookie = rt->rt6i_node->fn_sernum;
Herbert Xu25ee3282007-12-11 09:32:34 -0800121 xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway;
122 xdst->u.rt6.rt6i_dst = rt->rt6i_dst;
123 xdst->u.rt6.rt6i_src = rt->rt6i_src;
124
125 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126}
127
128static inline void
Herbert Xud5422ef2007-12-12 10:44:16 -0800129_decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
David S. Miller7e1dc7b2011-03-12 02:42:11 -0500131 struct flowi6 *fl6 = &fl->u.ip6;
Nicolas Dichtel7e3a42a2008-11-01 21:12:07 -0700132 int onlyproto = 0;
Arnaldo Carvalho de Melocfe1fc72007-03-16 17:26:39 -0300133 u16 offset = skb_network_header_len(skb);
Eric Dumazetb71d1d42011-04-22 04:53:02 +0000134 const struct ipv6hdr *hdr = ipv6_hdr(skb);
YOSHIFUJI Hideakie3cae902006-04-18 14:46:52 -0700135 struct ipv6_opt_hdr *exthdr;
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700136 const unsigned char *nh = skb_network_header(skb);
137 u8 nexthdr = nh[IP6CB(skb)->nhoff];
Steffen Klassert84502b52013-10-30 11:16:28 +0100138 int oif = 0;
139
140 if (skb_dst(skb))
141 oif = skb_dst(skb)->dev->ifindex;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
David S. Miller7e1dc7b2011-03-12 02:42:11 -0500143 memset(fl6, 0, sizeof(struct flowi6));
144 fl6->flowi6_mark = skb->mark;
Steffen Klassert84502b52013-10-30 11:16:28 +0100145 fl6->flowi6_oif = reverse ? skb->skb_iif : oif;
Peter Kosyh44b451f2010-07-02 07:47:55 +0000146
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000147 fl6->daddr = reverse ? hdr->saddr : hdr->daddr;
148 fl6->saddr = reverse ? hdr->daddr : hdr->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Wei Yongjun59cae002009-07-02 16:59:49 +0000150 while (nh + offset + 1 < skb->data ||
151 pskb_may_pull(skb, nh + offset + 1 - skb->data)) {
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700152 nh = skb_network_header(skb);
153 exthdr = (struct ipv6_opt_hdr *)(nh + offset);
YOSHIFUJI Hideakie3cae902006-04-18 14:46:52 -0700154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 switch (nexthdr) {
Nicolas Dichtel7e3a42a2008-11-01 21:12:07 -0700156 case NEXTHDR_FRAGMENT:
157 onlyproto = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 case NEXTHDR_ROUTING:
159 case NEXTHDR_HOP:
160 case NEXTHDR_DEST:
161 offset += ipv6_optlen(exthdr);
162 nexthdr = exthdr->nexthdr;
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700163 exthdr = (struct ipv6_opt_hdr *)(nh + offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 break;
165
166 case IPPROTO_UDP:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800167 case IPPROTO_UDPLITE:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 case IPPROTO_TCP:
169 case IPPROTO_SCTP:
Patrick McHardy9e999992005-12-19 14:03:46 -0800170 case IPPROTO_DCCP:
Wei Yongjun59cae002009-07-02 16:59:49 +0000171 if (!onlyproto && (nh + offset + 4 < skb->data ||
172 pskb_may_pull(skb, nh + offset + 4 - skb->data))) {
Al Viro8c689a62006-11-08 00:20:21 -0800173 __be16 *ports = (__be16 *)exthdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
David S. Miller1958b852011-03-12 16:36:19 -0500175 fl6->fl6_sport = ports[!!reverse];
176 fl6->fl6_dport = ports[!reverse];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 }
David S. Miller7e1dc7b2011-03-12 02:42:11 -0500178 fl6->flowi6_proto = nexthdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 return;
180
181 case IPPROTO_ICMPV6:
Nicolas Dichtel7e3a42a2008-11-01 21:12:07 -0700182 if (!onlyproto && pskb_may_pull(skb, nh + offset + 2 - skb->data)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 u8 *icmp = (u8 *)exthdr;
184
David S. Miller1958b852011-03-12 16:36:19 -0500185 fl6->fl6_icmp_type = icmp[0];
186 fl6->fl6_icmp_code = icmp[1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 }
David S. Miller7e1dc7b2011-03-12 02:42:11 -0500188 fl6->flowi6_proto = nexthdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 return;
190
Amerigo Wang07a93622012-10-29 16:23:10 +0000191#if IS_ENABLED(CONFIG_IPV6_MIP6)
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700192 case IPPROTO_MH:
Nicolas Dichtel7e3a42a2008-11-01 21:12:07 -0700193 if (!onlyproto && pskb_may_pull(skb, nh + offset + 3 - skb->data)) {
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700194 struct ip6_mh *mh;
195 mh = (struct ip6_mh *)exthdr;
196
David S. Miller1958b852011-03-12 16:36:19 -0500197 fl6->fl6_mh_type = mh->ip6mh_type;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700198 }
David S. Miller7e1dc7b2011-03-12 02:42:11 -0500199 fl6->flowi6_proto = nexthdr;
Masahide NAKAMURA2ce42722006-08-23 20:39:03 -0700200 return;
201#endif
202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 /* XXX Why are there these headers? */
204 case IPPROTO_AH:
205 case IPPROTO_ESP:
206 case IPPROTO_COMP:
207 default:
David S. Miller1958b852011-03-12 16:36:19 -0500208 fl6->fl6_ipsec_spi = 0;
David S. Miller7e1dc7b2011-03-12 02:42:11 -0500209 fl6->flowi6_proto = nexthdr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 return;
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700211 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 }
213}
214
Daniel Lezcano569d3642008-01-18 03:56:57 -0800215static inline int xfrm6_garbage_collect(struct dst_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
Alexey Dobriyand7c75442010-01-24 22:47:53 -0800217 struct net *net = container_of(ops, struct net, xfrm.xfrm6_dst_ops);
218
219 xfrm6_policy_afinfo.garbage_collect(net);
Eric Dumazetfc66f952010-10-08 06:37:34 +0000220 return dst_entries_get_fast(ops) > ops->gc_thresh * 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
222
David S. Miller6700c272012-07-17 03:29:28 -0700223static void xfrm6_update_pmtu(struct dst_entry *dst, struct sock *sk,
224 struct sk_buff *skb, u32 mtu)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225{
226 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
227 struct dst_entry *path = xdst->route;
228
David S. Miller6700c272012-07-17 03:29:28 -0700229 path->ops->update_pmtu(path, sk, skb, mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
David S. Miller6700c272012-07-17 03:29:28 -0700232static void xfrm6_redirect(struct dst_entry *dst, struct sock *sk,
233 struct sk_buff *skb)
David S. Millerec18d9a2012-07-12 00:25:15 -0700234{
235 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
236 struct dst_entry *path = xdst->route;
237
David S. Miller6700c272012-07-17 03:29:28 -0700238 path->ops->redirect(path, sk, skb);
David S. Millerec18d9a2012-07-12 00:25:15 -0700239}
240
Herbert Xuaabc9762005-05-03 16:27:10 -0700241static void xfrm6_dst_destroy(struct dst_entry *dst)
242{
243 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
244
245 if (likely(xdst->u.rt6.rt6i_idev))
246 in6_dev_put(xdst->u.rt6.rt6i_idev);
David S. Miller62fa8a82011-01-26 20:51:05 -0800247 dst_destroy_metrics_generic(dst);
David S. Miller97bab732012-06-09 22:36:36 -0700248 if (rt6_has_peer(&xdst->u.rt6)) {
249 struct inet_peer *peer = rt6_peer_ptr(&xdst->u.rt6);
250 inet_putpeer(peer);
251 }
Herbert Xuaabc9762005-05-03 16:27:10 -0700252 xfrm_dst_destroy(xdst);
253}
254
255static void xfrm6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
256 int unregister)
257{
258 struct xfrm_dst *xdst;
259
260 if (!unregister)
261 return;
262
263 xdst = (struct xfrm_dst *)dst;
264 if (xdst->u.rt6.rt6i_idev->dev == dev) {
Denis V. Lunev5a3e55d2007-12-07 00:38:10 -0800265 struct inet6_dev *loopback_idev =
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900266 in6_dev_get(dev_net(dev)->loopback_dev);
Herbert Xuaabc9762005-05-03 16:27:10 -0700267 BUG_ON(!loopback_idev);
268
269 do {
270 in6_dev_put(xdst->u.rt6.rt6i_idev);
271 xdst->u.rt6.rt6i_idev = loopback_idev;
272 in6_dev_hold(loopback_idev);
273 xdst = (struct xfrm_dst *)xdst->u.dst.child;
274 } while (xdst->u.dst.xfrm);
275
276 __in6_dev_put(loopback_idev);
277 }
278
279 xfrm_dst_ifdown(dst, dev);
280}
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282static struct dst_ops xfrm6_dst_ops = {
283 .family = AF_INET6,
Harvey Harrison09640e62009-02-01 00:45:17 -0800284 .protocol = cpu_to_be16(ETH_P_IPV6),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 .gc = xfrm6_garbage_collect,
286 .update_pmtu = xfrm6_update_pmtu,
David S. Millerec18d9a2012-07-12 00:25:15 -0700287 .redirect = xfrm6_redirect,
David S. Miller62fa8a82011-01-26 20:51:05 -0800288 .cow_metrics = dst_cow_metrics_generic,
Herbert Xuaabc9762005-05-03 16:27:10 -0700289 .destroy = xfrm6_dst_destroy,
290 .ifdown = xfrm6_dst_ifdown,
Herbert Xu862b82c2007-11-13 21:43:11 -0800291 .local_out = __ip6_local_out,
Steffen Klasserteeb1b732013-10-25 10:21:32 +0200292 .gc_thresh = 32768,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293};
294
295static struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
296 .family = AF_INET6,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 .dst_ops = &xfrm6_dst_ops,
298 .dst_lookup = xfrm6_dst_lookup,
Patrick McHardya1e59ab2006-09-19 12:57:34 -0700299 .get_saddr = xfrm6_get_saddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 .decode_session = _decode_session6,
Herbert Xu25ee3282007-12-11 09:32:34 -0800301 .get_tos = xfrm6_get_tos,
Patrick McHardy9d7b0fc2012-08-20 02:56:56 -0700302 .init_dst = xfrm6_init_dst,
Masahide NAKAMURAa1b05142007-12-20 20:41:12 -0800303 .init_path = xfrm6_init_path,
Herbert Xu25ee3282007-12-11 09:32:34 -0800304 .fill_dst = xfrm6_fill_dst,
David S. Miller2774c132011-03-01 14:59:04 -0800305 .blackhole_route = ip6_blackhole_route,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306};
307
Daniel Lezcano0013cab2007-12-07 00:42:11 -0800308static int __init xfrm6_policy_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309{
Daniel Lezcano0013cab2007-12-07 00:42:11 -0800310 return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311}
312
313static void xfrm6_policy_fini(void)
314{
315 xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo);
316}
317
David S. Millerdb717892009-08-04 20:32:16 -0700318#ifdef CONFIG_SYSCTL
Neil Hormana44a4a02009-07-27 08:22:46 +0000319static struct ctl_table xfrm6_policy_table[] = {
320 {
Neil Hormana44a4a02009-07-27 08:22:46 +0000321 .procname = "xfrm6_gc_thresh",
Alexey Dobriyand7c75442010-01-24 22:47:53 -0800322 .data = &init_net.xfrm.xfrm6_dst_ops.gc_thresh,
Neil Hormana44a4a02009-07-27 08:22:46 +0000323 .maxlen = sizeof(int),
324 .mode = 0644,
325 .proc_handler = proc_dointvec,
326 },
327 { }
328};
329
Michal Kubecek8d068872013-02-06 10:46:33 +0100330static int __net_init xfrm6_net_init(struct net *net)
331{
332 struct ctl_table *table;
333 struct ctl_table_header *hdr;
334
335 table = xfrm6_policy_table;
336 if (!net_eq(net, &init_net)) {
337 table = kmemdup(table, sizeof(xfrm6_policy_table), GFP_KERNEL);
338 if (!table)
339 goto err_alloc;
340
341 table[0].data = &net->xfrm.xfrm6_dst_ops.gc_thresh;
342 }
343
344 hdr = register_net_sysctl(net, "net/ipv6", table);
345 if (!hdr)
346 goto err_reg;
347
348 net->ipv6.sysctl.xfrm6_hdr = hdr;
349 return 0;
350
351err_reg:
352 if (!net_eq(net, &init_net))
353 kfree(table);
354err_alloc:
355 return -ENOMEM;
356}
357
358static void __net_exit xfrm6_net_exit(struct net *net)
359{
360 struct ctl_table *table;
361
362 if (net->ipv6.sysctl.xfrm6_hdr == NULL)
363 return;
364
365 table = net->ipv6.sysctl.xfrm6_hdr->ctl_table_arg;
366 unregister_net_sysctl_table(net->ipv6.sysctl.xfrm6_hdr);
367 if (!net_eq(net, &init_net))
368 kfree(table);
369}
370
371static struct pernet_operations xfrm6_net_ops = {
372 .init = xfrm6_net_init,
373 .exit = xfrm6_net_exit,
374};
David S. Millerdb717892009-08-04 20:32:16 -0700375#endif
Neil Hormana44a4a02009-07-27 08:22:46 +0000376
Daniel Lezcano0013cab2007-12-07 00:42:11 -0800377int __init xfrm6_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
Daniel Lezcano0013cab2007-12-07 00:42:11 -0800379 int ret;
380
Eric Dumazetfc66f952010-10-08 06:37:34 +0000381 dst_entries_init(&xfrm6_dst_ops);
Alexey Dobriyand7c75442010-01-24 22:47:53 -0800382
383 ret = xfrm6_policy_init();
Eric Dumazetfc66f952010-10-08 06:37:34 +0000384 if (ret) {
385 dst_entries_destroy(&xfrm6_dst_ops);
Alexey Dobriyand7c75442010-01-24 22:47:53 -0800386 goto out;
Eric Dumazetfc66f952010-10-08 06:37:34 +0000387 }
Alexey Dobriyand7c75442010-01-24 22:47:53 -0800388 ret = xfrm6_state_init();
389 if (ret)
390 goto out_policy;
391
David S. Millerdb717892009-08-04 20:32:16 -0700392#ifdef CONFIG_SYSCTL
Michal Kubecek8d068872013-02-06 10:46:33 +0100393 register_pernet_subsys(&xfrm6_net_ops);
David S. Millerdb717892009-08-04 20:32:16 -0700394#endif
Daniel Lezcano0013cab2007-12-07 00:42:11 -0800395out:
396 return ret;
397out_policy:
398 xfrm6_policy_fini();
399 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400}
401
402void xfrm6_fini(void)
403{
David S. Millerdb717892009-08-04 20:32:16 -0700404#ifdef CONFIG_SYSCTL
Michal Kubecek8d068872013-02-06 10:46:33 +0100405 unregister_pernet_subsys(&xfrm6_net_ops);
David S. Millerdb717892009-08-04 20:32:16 -0700406#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 xfrm6_policy_fini();
408 xfrm6_state_fini();
Eric Dumazetfc66f952010-10-08 06:37:34 +0000409 dst_entries_destroy(&xfrm6_dst_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410}