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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * xfrm6_policy.c: based on xfrm4_policy.c
4 *
5 * Authors:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
10 * YOSHIFUJI Hideaki
11 * Split up af-specific portion
12 *
13 */
14
15#include <linux/err.h>
16#include <linux/kernel.h>
17#include <linux/netdevice.h>
18#include <net/addrconf.h>
19#include <net/dst.h>
20#include <net/xfrm.h>
21#include <net/ip.h>
22#include <net/ipv6.h>
23#include <net/ip6_route.h>
24#include <net/l3mdev.h>
25#if IS_ENABLED(CONFIG_IPV6_MIP6)
26#include <net/mip6.h>
27#endif
28
29static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
30 const xfrm_address_t *saddr,
31 const xfrm_address_t *daddr,
32 u32 mark)
33{
34 struct flowi6 fl6;
35 struct dst_entry *dst;
36 int err;
37
38 memset(&fl6, 0, sizeof(fl6));
39 fl6.flowi6_oif = l3mdev_master_ifindex_by_index(net, oif);
40 fl6.flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF;
41 fl6.flowi6_mark = mark;
42 memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
43 if (saddr)
44 memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr));
45
46 dst = ip6_route_output(net, NULL, &fl6);
47
48 err = dst->error;
49 if (dst->error) {
50 dst_release(dst);
51 dst = ERR_PTR(err);
52 }
53
54 return dst;
55}
56
57static int xfrm6_get_saddr(struct net *net, int oif,
58 xfrm_address_t *saddr, xfrm_address_t *daddr,
59 u32 mark)
60{
61 struct dst_entry *dst;
62 struct net_device *dev;
63
64 dst = xfrm6_dst_lookup(net, 0, oif, NULL, daddr, mark);
65 if (IS_ERR(dst))
66 return -EHOSTUNREACH;
67
68 dev = ip6_dst_idev(dst)->dev;
69 ipv6_dev_get_saddr(dev_net(dev), dev, &daddr->in6, 0, &saddr->in6);
70 dst_release(dst);
71 return 0;
72}
73
74static int xfrm6_get_tos(const struct flowi *fl)
75{
76 return 0;
77}
78
79static int xfrm6_init_path(struct xfrm_dst *path, struct dst_entry *dst,
80 int nfheader_len)
81{
82 if (dst->ops->family == AF_INET6) {
83 struct rt6_info *rt = (struct rt6_info *)dst;
84 path->path_cookie = rt6_get_cookie(rt);
85 }
86
87 path->u.rt6.rt6i_nfheader_len = nfheader_len;
88
89 return 0;
90}
91
92static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
93 const struct flowi *fl)
94{
95 struct rt6_info *rt = (struct rt6_info *)xdst->route;
96
97 xdst->u.dst.dev = dev;
98 dev_hold(dev);
99
100 xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
101 if (!xdst->u.rt6.rt6i_idev) {
102 dev_put(dev);
103 return -ENODEV;
104 }
105
106 /* Sheit... I remember I did this right. Apparently,
107 * it was magically lost, so this code needs audit */
108 xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
109 RTF_LOCAL);
110 xdst->u.rt6.rt6i_metric = rt->rt6i_metric;
111 xdst->u.rt6.rt6i_node = rt->rt6i_node;
112 xdst->route_cookie = rt6_get_cookie(rt);
113 xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway;
114 xdst->u.rt6.rt6i_dst = rt->rt6i_dst;
115 xdst->u.rt6.rt6i_src = rt->rt6i_src;
116 INIT_LIST_HEAD(&xdst->u.rt6.rt6i_uncached);
117 rt6_uncached_list_add(&xdst->u.rt6);
118 atomic_inc(&dev_net(dev)->ipv6.rt6_stats->fib_rt_uncache);
119
120 return 0;
121}
122
123static inline void
124_decode_session6(struct sk_buff *skb, struct flowi *fl, int reverse)
125{
126 struct flowi6 *fl6 = &fl->u.ip6;
127 int onlyproto = 0;
128 const struct ipv6hdr *hdr = ipv6_hdr(skb);
129 u32 offset = sizeof(*hdr);
130 struct ipv6_opt_hdr *exthdr;
131 const unsigned char *nh = skb_network_header(skb);
132 u16 nhoff = IP6CB(skb)->nhoff;
133 int oif = 0;
134 u8 nexthdr;
135
136 if (!nhoff)
137 nhoff = offsetof(struct ipv6hdr, nexthdr);
138
139 nexthdr = nh[nhoff];
140
141 if (skb_dst(skb))
142 oif = skb_dst(skb)->dev->ifindex;
143
144 memset(fl6, 0, sizeof(struct flowi6));
145 fl6->flowi6_mark = skb->mark;
146 fl6->flowi6_oif = reverse ? skb->skb_iif : oif;
147
148 fl6->daddr = reverse ? hdr->saddr : hdr->daddr;
149 fl6->saddr = reverse ? hdr->daddr : hdr->saddr;
150
151 while (nh + offset + 1 < skb->data ||
152 pskb_may_pull(skb, nh + offset + 1 - skb->data)) {
153 nh = skb_network_header(skb);
154 exthdr = (struct ipv6_opt_hdr *)(nh + offset);
155
156 switch (nexthdr) {
157 case NEXTHDR_FRAGMENT:
158 onlyproto = 1;
159 /* fall through */
160 case NEXTHDR_ROUTING:
161 case NEXTHDR_HOP:
162 case NEXTHDR_DEST:
163 offset += ipv6_optlen(exthdr);
164 nexthdr = exthdr->nexthdr;
165 exthdr = (struct ipv6_opt_hdr *)(nh + offset);
166 break;
167
168 case IPPROTO_UDP:
169 case IPPROTO_UDPLITE:
170 case IPPROTO_TCP:
171 case IPPROTO_SCTP:
172 case IPPROTO_DCCP:
173 if (!onlyproto && (nh + offset + 4 < skb->data ||
174 pskb_may_pull(skb, nh + offset + 4 - skb->data))) {
175 __be16 *ports;
176
177 nh = skb_network_header(skb);
178 ports = (__be16 *)(nh + offset);
179 fl6->fl6_sport = ports[!!reverse];
180 fl6->fl6_dport = ports[!reverse];
181 }
182 fl6->flowi6_proto = nexthdr;
183 return;
184
185 case IPPROTO_ICMPV6:
186 if (!onlyproto && (nh + offset + 2 < skb->data ||
187 pskb_may_pull(skb, nh + offset + 2 - skb->data))) {
188 u8 *icmp;
189
190 nh = skb_network_header(skb);
191 icmp = (u8 *)(nh + offset);
192 fl6->fl6_icmp_type = icmp[0];
193 fl6->fl6_icmp_code = icmp[1];
194 }
195 fl6->flowi6_proto = nexthdr;
196 return;
197
198#if IS_ENABLED(CONFIG_IPV6_MIP6)
199 case IPPROTO_MH:
200 offset += ipv6_optlen(exthdr);
201 if (!onlyproto && (nh + offset + 3 < skb->data ||
202 pskb_may_pull(skb, nh + offset + 3 - skb->data))) {
203 struct ip6_mh *mh;
204
205 nh = skb_network_header(skb);
206 mh = (struct ip6_mh *)(nh + offset);
207 fl6->fl6_mh_type = mh->ip6mh_type;
208 }
209 fl6->flowi6_proto = nexthdr;
210 return;
211#endif
212
213 /* XXX Why are there these headers? */
214 case IPPROTO_AH:
215 case IPPROTO_ESP:
216 case IPPROTO_COMP:
217 default:
218 fl6->fl6_ipsec_spi = 0;
219 fl6->flowi6_proto = nexthdr;
220 return;
221 }
222 }
223}
224
225static void xfrm6_update_pmtu(struct dst_entry *dst, struct sock *sk,
226 struct sk_buff *skb, u32 mtu)
227{
228 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
229 struct dst_entry *path = xdst->route;
230
231 path->ops->update_pmtu(path, sk, skb, mtu);
232}
233
234static void xfrm6_redirect(struct dst_entry *dst, struct sock *sk,
235 struct sk_buff *skb)
236{
237 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
238 struct dst_entry *path = xdst->route;
239
240 path->ops->redirect(path, sk, skb);
241}
242
243static void xfrm6_dst_destroy(struct dst_entry *dst)
244{
245 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
246
247 if (likely(xdst->u.rt6.rt6i_idev))
248 in6_dev_put(xdst->u.rt6.rt6i_idev);
249 dst_destroy_metrics_generic(dst);
250 if (xdst->u.rt6.rt6i_uncached_list)
251 rt6_uncached_list_del(&xdst->u.rt6);
252 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) {
265 struct inet6_dev *loopback_idev =
266 in6_dev_get(dev_net(dev)->loopback_dev);
267 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 *)xfrm_dst_child(&xdst->u.dst);
274 } while (xdst->u.dst.xfrm);
275
276 __in6_dev_put(loopback_idev);
277 }
278
279 xfrm_dst_ifdown(dst, dev);
280}
281
282static struct dst_ops xfrm6_dst_ops_template = {
283 .family = AF_INET6,
284 .update_pmtu = xfrm6_update_pmtu,
285 .redirect = xfrm6_redirect,
286 .cow_metrics = dst_cow_metrics_generic,
287 .destroy = xfrm6_dst_destroy,
288 .ifdown = xfrm6_dst_ifdown,
289 .local_out = __ip6_local_out,
290 .gc_thresh = 32768,
291};
292
293static const struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
294 .dst_ops = &xfrm6_dst_ops_template,
295 .dst_lookup = xfrm6_dst_lookup,
296 .get_saddr = xfrm6_get_saddr,
297 .decode_session = _decode_session6,
298 .get_tos = xfrm6_get_tos,
299 .init_path = xfrm6_init_path,
300 .fill_dst = xfrm6_fill_dst,
301 .blackhole_route = ip6_blackhole_route,
302};
303
304static int __init xfrm6_policy_init(void)
305{
306 return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo, AF_INET6);
307}
308
309static void xfrm6_policy_fini(void)
310{
311 xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo);
312}
313
314#ifdef CONFIG_SYSCTL
315static struct ctl_table xfrm6_policy_table[] = {
316 {
317 .procname = "xfrm6_gc_thresh",
318 .data = &init_net.xfrm.xfrm6_dst_ops.gc_thresh,
319 .maxlen = sizeof(int),
320 .mode = 0644,
321 .proc_handler = proc_dointvec,
322 },
323 { }
324};
325
326static int __net_init xfrm6_net_sysctl_init(struct net *net)
327{
328 struct ctl_table *table;
329 struct ctl_table_header *hdr;
330
331 table = xfrm6_policy_table;
332 if (!net_eq(net, &init_net)) {
333 table = kmemdup(table, sizeof(xfrm6_policy_table), GFP_KERNEL);
334 if (!table)
335 goto err_alloc;
336
337 table[0].data = &net->xfrm.xfrm6_dst_ops.gc_thresh;
338 }
339
340 hdr = register_net_sysctl(net, "net/ipv6", table);
341 if (!hdr)
342 goto err_reg;
343
344 net->ipv6.sysctl.xfrm6_hdr = hdr;
345 return 0;
346
347err_reg:
348 if (!net_eq(net, &init_net))
349 kfree(table);
350err_alloc:
351 return -ENOMEM;
352}
353
354static void __net_exit xfrm6_net_sysctl_exit(struct net *net)
355{
356 struct ctl_table *table;
357
358 if (!net->ipv6.sysctl.xfrm6_hdr)
359 return;
360
361 table = net->ipv6.sysctl.xfrm6_hdr->ctl_table_arg;
362 unregister_net_sysctl_table(net->ipv6.sysctl.xfrm6_hdr);
363 if (!net_eq(net, &init_net))
364 kfree(table);
365}
366#else /* CONFIG_SYSCTL */
367static inline int xfrm6_net_sysctl_init(struct net *net)
368{
369 return 0;
370}
371
372static inline void xfrm6_net_sysctl_exit(struct net *net)
373{
374}
375#endif
376
377static int __net_init xfrm6_net_init(struct net *net)
378{
379 int ret;
380
381 memcpy(&net->xfrm.xfrm6_dst_ops, &xfrm6_dst_ops_template,
382 sizeof(xfrm6_dst_ops_template));
383 ret = dst_entries_init(&net->xfrm.xfrm6_dst_ops);
384 if (ret)
385 return ret;
386
387 ret = xfrm6_net_sysctl_init(net);
388 if (ret)
389 dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);
390
391 return ret;
392}
393
394static void __net_exit xfrm6_net_exit(struct net *net)
395{
396 xfrm6_net_sysctl_exit(net);
397 dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);
398}
399
400static struct pernet_operations xfrm6_net_ops = {
401 .init = xfrm6_net_init,
402 .exit = xfrm6_net_exit,
403};
404
405int __init xfrm6_init(void)
406{
407 int ret;
408
409 ret = xfrm6_policy_init();
410 if (ret)
411 goto out;
412 ret = xfrm6_state_init();
413 if (ret)
414 goto out_policy;
415
416 ret = xfrm6_protocol_init();
417 if (ret)
418 goto out_state;
419
420 register_pernet_subsys(&xfrm6_net_ops);
421out:
422 return ret;
423out_state:
424 xfrm6_state_fini();
425out_policy:
426 xfrm6_policy_fini();
427 goto out;
428}
429
430void xfrm6_fini(void)
431{
432 unregister_pernet_subsys(&xfrm6_net_ops);
433 xfrm6_protocol_fini();
434 xfrm6_policy_fini();
435 xfrm6_state_fini();
436}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * xfrm6_policy.c: based on xfrm4_policy.c
4 *
5 * Authors:
6 * Mitsuru KANDA @USAGI
7 * Kazunori MIYAZAWA @USAGI
8 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
9 * IPv6 support
10 * YOSHIFUJI Hideaki
11 * Split up af-specific portion
12 *
13 */
14
15#include <linux/err.h>
16#include <linux/kernel.h>
17#include <linux/netdevice.h>
18#include <net/addrconf.h>
19#include <net/dst.h>
20#include <net/xfrm.h>
21#include <net/ip.h>
22#include <net/ipv6.h>
23#include <net/ip6_route.h>
24#include <net/l3mdev.h>
25
26static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
27 const xfrm_address_t *saddr,
28 const xfrm_address_t *daddr,
29 u32 mark)
30{
31 struct flowi6 fl6;
32 struct dst_entry *dst;
33 int err;
34
35 memset(&fl6, 0, sizeof(fl6));
36 fl6.flowi6_l3mdev = l3mdev_master_ifindex_by_index(net, oif);
37 fl6.flowi6_mark = mark;
38 memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
39 if (saddr)
40 memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr));
41
42 dst = ip6_route_output(net, NULL, &fl6);
43
44 err = dst->error;
45 if (dst->error) {
46 dst_release(dst);
47 dst = ERR_PTR(err);
48 }
49
50 return dst;
51}
52
53static int xfrm6_get_saddr(struct net *net, int oif,
54 xfrm_address_t *saddr, xfrm_address_t *daddr,
55 u32 mark)
56{
57 struct dst_entry *dst;
58 struct net_device *dev;
59
60 dst = xfrm6_dst_lookup(net, 0, oif, NULL, daddr, mark);
61 if (IS_ERR(dst))
62 return -EHOSTUNREACH;
63
64 dev = ip6_dst_idev(dst)->dev;
65 ipv6_dev_get_saddr(dev_net(dev), dev, &daddr->in6, 0, &saddr->in6);
66 dst_release(dst);
67 return 0;
68}
69
70static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
71 const struct flowi *fl)
72{
73 struct rt6_info *rt = (struct rt6_info *)xdst->route;
74
75 xdst->u.dst.dev = dev;
76 netdev_hold(dev, &xdst->u.dst.dev_tracker, GFP_ATOMIC);
77
78 xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
79 if (!xdst->u.rt6.rt6i_idev) {
80 netdev_put(dev, &xdst->u.dst.dev_tracker);
81 return -ENODEV;
82 }
83
84 /* Sheit... I remember I did this right. Apparently,
85 * it was magically lost, so this code needs audit */
86 xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
87 RTF_LOCAL);
88 xdst->route_cookie = rt6_get_cookie(rt);
89 xdst->u.rt6.rt6i_gateway = rt->rt6i_gateway;
90 xdst->u.rt6.rt6i_dst = rt->rt6i_dst;
91 xdst->u.rt6.rt6i_src = rt->rt6i_src;
92 rt6_uncached_list_add(&xdst->u.rt6);
93
94 return 0;
95}
96
97static void xfrm6_update_pmtu(struct dst_entry *dst, struct sock *sk,
98 struct sk_buff *skb, u32 mtu,
99 bool confirm_neigh)
100{
101 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
102 struct dst_entry *path = xdst->route;
103
104 path->ops->update_pmtu(path, sk, skb, mtu, confirm_neigh);
105}
106
107static void xfrm6_redirect(struct dst_entry *dst, struct sock *sk,
108 struct sk_buff *skb)
109{
110 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
111 struct dst_entry *path = xdst->route;
112
113 path->ops->redirect(path, sk, skb);
114}
115
116static void xfrm6_dst_destroy(struct dst_entry *dst)
117{
118 struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
119
120 dst_destroy_metrics_generic(dst);
121 rt6_uncached_list_del(&xdst->u.rt6);
122 if (likely(xdst->u.rt6.rt6i_idev))
123 in6_dev_put(xdst->u.rt6.rt6i_idev);
124 xfrm_dst_destroy(xdst);
125}
126
127static void xfrm6_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
128{
129 struct xfrm_dst *xdst;
130
131 xdst = (struct xfrm_dst *)dst;
132 if (xdst->u.rt6.rt6i_idev->dev == dev) {
133 struct inet6_dev *loopback_idev =
134 in6_dev_get(dev_net(dev)->loopback_dev);
135
136 do {
137 in6_dev_put(xdst->u.rt6.rt6i_idev);
138 xdst->u.rt6.rt6i_idev = loopback_idev;
139 in6_dev_hold(loopback_idev);
140 xdst = (struct xfrm_dst *)xfrm_dst_child(&xdst->u.dst);
141 } while (xdst->u.dst.xfrm);
142
143 __in6_dev_put(loopback_idev);
144 }
145
146 xfrm_dst_ifdown(dst, dev);
147}
148
149static struct dst_ops xfrm6_dst_ops_template = {
150 .family = AF_INET6,
151 .update_pmtu = xfrm6_update_pmtu,
152 .redirect = xfrm6_redirect,
153 .cow_metrics = dst_cow_metrics_generic,
154 .destroy = xfrm6_dst_destroy,
155 .ifdown = xfrm6_dst_ifdown,
156 .local_out = __ip6_local_out,
157 .gc_thresh = 32768,
158};
159
160static const struct xfrm_policy_afinfo xfrm6_policy_afinfo = {
161 .dst_ops = &xfrm6_dst_ops_template,
162 .dst_lookup = xfrm6_dst_lookup,
163 .get_saddr = xfrm6_get_saddr,
164 .fill_dst = xfrm6_fill_dst,
165 .blackhole_route = ip6_blackhole_route,
166};
167
168static int __init xfrm6_policy_init(void)
169{
170 return xfrm_policy_register_afinfo(&xfrm6_policy_afinfo, AF_INET6);
171}
172
173static void xfrm6_policy_fini(void)
174{
175 xfrm_policy_unregister_afinfo(&xfrm6_policy_afinfo);
176}
177
178#ifdef CONFIG_SYSCTL
179static struct ctl_table xfrm6_policy_table[] = {
180 {
181 .procname = "xfrm6_gc_thresh",
182 .data = &init_net.xfrm.xfrm6_dst_ops.gc_thresh,
183 .maxlen = sizeof(int),
184 .mode = 0644,
185 .proc_handler = proc_dointvec,
186 },
187 { }
188};
189
190static int __net_init xfrm6_net_sysctl_init(struct net *net)
191{
192 struct ctl_table *table;
193 struct ctl_table_header *hdr;
194
195 table = xfrm6_policy_table;
196 if (!net_eq(net, &init_net)) {
197 table = kmemdup(table, sizeof(xfrm6_policy_table), GFP_KERNEL);
198 if (!table)
199 goto err_alloc;
200
201 table[0].data = &net->xfrm.xfrm6_dst_ops.gc_thresh;
202 }
203
204 hdr = register_net_sysctl_sz(net, "net/ipv6", table,
205 ARRAY_SIZE(xfrm6_policy_table));
206 if (!hdr)
207 goto err_reg;
208
209 net->ipv6.sysctl.xfrm6_hdr = hdr;
210 return 0;
211
212err_reg:
213 if (!net_eq(net, &init_net))
214 kfree(table);
215err_alloc:
216 return -ENOMEM;
217}
218
219static void __net_exit xfrm6_net_sysctl_exit(struct net *net)
220{
221 struct ctl_table *table;
222
223 if (!net->ipv6.sysctl.xfrm6_hdr)
224 return;
225
226 table = net->ipv6.sysctl.xfrm6_hdr->ctl_table_arg;
227 unregister_net_sysctl_table(net->ipv6.sysctl.xfrm6_hdr);
228 if (!net_eq(net, &init_net))
229 kfree(table);
230}
231#else /* CONFIG_SYSCTL */
232static inline int xfrm6_net_sysctl_init(struct net *net)
233{
234 return 0;
235}
236
237static inline void xfrm6_net_sysctl_exit(struct net *net)
238{
239}
240#endif
241
242static int __net_init xfrm6_net_init(struct net *net)
243{
244 int ret;
245
246 memcpy(&net->xfrm.xfrm6_dst_ops, &xfrm6_dst_ops_template,
247 sizeof(xfrm6_dst_ops_template));
248 ret = dst_entries_init(&net->xfrm.xfrm6_dst_ops);
249 if (ret)
250 return ret;
251
252 ret = xfrm6_net_sysctl_init(net);
253 if (ret)
254 dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);
255
256 return ret;
257}
258
259static void __net_exit xfrm6_net_exit(struct net *net)
260{
261 xfrm6_net_sysctl_exit(net);
262 dst_entries_destroy(&net->xfrm.xfrm6_dst_ops);
263}
264
265static struct pernet_operations xfrm6_net_ops = {
266 .init = xfrm6_net_init,
267 .exit = xfrm6_net_exit,
268};
269
270int __init xfrm6_init(void)
271{
272 int ret;
273
274 ret = xfrm6_policy_init();
275 if (ret)
276 goto out;
277 ret = xfrm6_state_init();
278 if (ret)
279 goto out_policy;
280
281 ret = xfrm6_protocol_init();
282 if (ret)
283 goto out_state;
284
285 ret = register_pernet_subsys(&xfrm6_net_ops);
286 if (ret)
287 goto out_protocol;
288out:
289 return ret;
290out_protocol:
291 xfrm6_protocol_fini();
292out_state:
293 xfrm6_state_fini();
294out_policy:
295 xfrm6_policy_fini();
296 goto out;
297}
298
299void xfrm6_fini(void)
300{
301 unregister_pernet_subsys(&xfrm6_net_ops);
302 xfrm6_protocol_fini();
303 xfrm6_policy_fini();
304 xfrm6_state_fini();
305}