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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Linux INET6 implementation | |
3 | * FIB front-end. | |
4 | * | |
5 | * Authors: | |
1ab1457c | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
1da177e4 | 7 | * |
1da177e4 LT |
8 | * This program is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | /* Changes: | |
15 | * | |
16 | * YOSHIFUJI Hideaki @USAGI | |
17 | * reworked default router selection. | |
18 | * - respect outgoing interface | |
19 | * - select from (probably) reachable routers (i.e. | |
20 | * routers in REACHABLE, STALE, DELAY or PROBE states). | |
21 | * - always select the same router if it is (probably) | |
22 | * reachable. otherwise, round-robin the list. | |
c0bece9f YH |
23 | * Ville Nuorvala |
24 | * Fixed routing subtrees. | |
1da177e4 LT |
25 | */ |
26 | ||
f3213831 JP |
27 | #define pr_fmt(fmt) "IPv6: " fmt |
28 | ||
4fc268d2 | 29 | #include <linux/capability.h> |
1da177e4 | 30 | #include <linux/errno.h> |
bc3b2d7f | 31 | #include <linux/export.h> |
1da177e4 LT |
32 | #include <linux/types.h> |
33 | #include <linux/times.h> | |
34 | #include <linux/socket.h> | |
35 | #include <linux/sockios.h> | |
36 | #include <linux/net.h> | |
37 | #include <linux/route.h> | |
38 | #include <linux/netdevice.h> | |
39 | #include <linux/in6.h> | |
7bc570c8 | 40 | #include <linux/mroute6.h> |
1da177e4 | 41 | #include <linux/init.h> |
1da177e4 | 42 | #include <linux/if_arp.h> |
1da177e4 LT |
43 | #include <linux/proc_fs.h> |
44 | #include <linux/seq_file.h> | |
5b7c931d | 45 | #include <linux/nsproxy.h> |
5a0e3ad6 | 46 | #include <linux/slab.h> |
457c4cbc | 47 | #include <net/net_namespace.h> |
1da177e4 LT |
48 | #include <net/snmp.h> |
49 | #include <net/ipv6.h> | |
50 | #include <net/ip6_fib.h> | |
51 | #include <net/ip6_route.h> | |
52 | #include <net/ndisc.h> | |
53 | #include <net/addrconf.h> | |
54 | #include <net/tcp.h> | |
55 | #include <linux/rtnetlink.h> | |
56 | #include <net/dst.h> | |
57 | #include <net/xfrm.h> | |
8d71740c | 58 | #include <net/netevent.h> |
21713ebc | 59 | #include <net/netlink.h> |
1da177e4 LT |
60 | |
61 | #include <asm/uaccess.h> | |
62 | ||
63 | #ifdef CONFIG_SYSCTL | |
64 | #include <linux/sysctl.h> | |
65 | #endif | |
66 | ||
1716a961 | 67 | static struct rt6_info *ip6_rt_copy(struct rt6_info *ort, |
21efcfa0 | 68 | const struct in6_addr *dest); |
1da177e4 | 69 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie); |
0dbaee3b | 70 | static unsigned int ip6_default_advmss(const struct dst_entry *dst); |
ebb762f2 | 71 | static unsigned int ip6_mtu(const struct dst_entry *dst); |
1da177e4 LT |
72 | static struct dst_entry *ip6_negative_advice(struct dst_entry *); |
73 | static void ip6_dst_destroy(struct dst_entry *); | |
74 | static void ip6_dst_ifdown(struct dst_entry *, | |
75 | struct net_device *dev, int how); | |
569d3645 | 76 | static int ip6_dst_gc(struct dst_ops *ops); |
1da177e4 LT |
77 | |
78 | static int ip6_pkt_discard(struct sk_buff *skb); | |
79 | static int ip6_pkt_discard_out(struct sk_buff *skb); | |
80 | static void ip6_link_failure(struct sk_buff *skb); | |
6700c270 DM |
81 | static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, |
82 | struct sk_buff *skb, u32 mtu); | |
83 | static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, | |
84 | struct sk_buff *skb); | |
1da177e4 | 85 | |
70ceb4f5 | 86 | #ifdef CONFIG_IPV6_ROUTE_INFO |
efa2cea0 | 87 | static struct rt6_info *rt6_add_route_info(struct net *net, |
b71d1d42 ED |
88 | const struct in6_addr *prefix, int prefixlen, |
89 | const struct in6_addr *gwaddr, int ifindex, | |
95c96174 | 90 | unsigned int pref); |
efa2cea0 | 91 | static struct rt6_info *rt6_get_route_info(struct net *net, |
b71d1d42 ED |
92 | const struct in6_addr *prefix, int prefixlen, |
93 | const struct in6_addr *gwaddr, int ifindex); | |
70ceb4f5 YH |
94 | #endif |
95 | ||
06582540 DM |
96 | static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old) |
97 | { | |
98 | struct rt6_info *rt = (struct rt6_info *) dst; | |
99 | struct inet_peer *peer; | |
100 | u32 *p = NULL; | |
101 | ||
8e2ec639 YZ |
102 | if (!(rt->dst.flags & DST_HOST)) |
103 | return NULL; | |
104 | ||
fbfe95a4 | 105 | peer = rt6_get_peer_create(rt); |
06582540 DM |
106 | if (peer) { |
107 | u32 *old_p = __DST_METRICS_PTR(old); | |
108 | unsigned long prev, new; | |
109 | ||
110 | p = peer->metrics; | |
111 | if (inet_metrics_new(peer)) | |
112 | memcpy(p, old_p, sizeof(u32) * RTAX_MAX); | |
113 | ||
114 | new = (unsigned long) p; | |
115 | prev = cmpxchg(&dst->_metrics, old, new); | |
116 | ||
117 | if (prev != old) { | |
118 | p = __DST_METRICS_PTR(prev); | |
119 | if (prev & DST_METRICS_READ_ONLY) | |
120 | p = NULL; | |
121 | } | |
122 | } | |
123 | return p; | |
124 | } | |
125 | ||
f894cbf8 DM |
126 | static inline const void *choose_neigh_daddr(struct rt6_info *rt, |
127 | struct sk_buff *skb, | |
128 | const void *daddr) | |
39232973 DM |
129 | { |
130 | struct in6_addr *p = &rt->rt6i_gateway; | |
131 | ||
a7563f34 | 132 | if (!ipv6_addr_any(p)) |
39232973 | 133 | return (const void *) p; |
f894cbf8 DM |
134 | else if (skb) |
135 | return &ipv6_hdr(skb)->daddr; | |
39232973 DM |
136 | return daddr; |
137 | } | |
138 | ||
f894cbf8 DM |
139 | static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, |
140 | struct sk_buff *skb, | |
141 | const void *daddr) | |
d3aaeb38 | 142 | { |
39232973 DM |
143 | struct rt6_info *rt = (struct rt6_info *) dst; |
144 | struct neighbour *n; | |
145 | ||
f894cbf8 | 146 | daddr = choose_neigh_daddr(rt, skb, daddr); |
39232973 | 147 | n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr); |
f83c7790 DM |
148 | if (n) |
149 | return n; | |
150 | return neigh_create(&nd_tbl, daddr, dst->dev); | |
151 | } | |
152 | ||
8ade06c6 | 153 | static int rt6_bind_neighbour(struct rt6_info *rt, struct net_device *dev) |
f83c7790 | 154 | { |
8ade06c6 DM |
155 | struct neighbour *n = __ipv6_neigh_lookup(&nd_tbl, dev, &rt->rt6i_gateway); |
156 | if (!n) { | |
157 | n = neigh_create(&nd_tbl, &rt->rt6i_gateway, dev); | |
158 | if (IS_ERR(n)) | |
159 | return PTR_ERR(n); | |
160 | } | |
97cac082 | 161 | rt->n = n; |
f83c7790 DM |
162 | |
163 | return 0; | |
d3aaeb38 DM |
164 | } |
165 | ||
9a7ec3a9 | 166 | static struct dst_ops ip6_dst_ops_template = { |
1da177e4 | 167 | .family = AF_INET6, |
09640e63 | 168 | .protocol = cpu_to_be16(ETH_P_IPV6), |
1da177e4 LT |
169 | .gc = ip6_dst_gc, |
170 | .gc_thresh = 1024, | |
171 | .check = ip6_dst_check, | |
0dbaee3b | 172 | .default_advmss = ip6_default_advmss, |
ebb762f2 | 173 | .mtu = ip6_mtu, |
06582540 | 174 | .cow_metrics = ipv6_cow_metrics, |
1da177e4 LT |
175 | .destroy = ip6_dst_destroy, |
176 | .ifdown = ip6_dst_ifdown, | |
177 | .negative_advice = ip6_negative_advice, | |
178 | .link_failure = ip6_link_failure, | |
179 | .update_pmtu = ip6_rt_update_pmtu, | |
6e157b6a | 180 | .redirect = rt6_do_redirect, |
1ac06e03 | 181 | .local_out = __ip6_local_out, |
d3aaeb38 | 182 | .neigh_lookup = ip6_neigh_lookup, |
1da177e4 LT |
183 | }; |
184 | ||
ebb762f2 | 185 | static unsigned int ip6_blackhole_mtu(const struct dst_entry *dst) |
ec831ea7 | 186 | { |
618f9bc7 SK |
187 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
188 | ||
189 | return mtu ? : dst->dev->mtu; | |
ec831ea7 RD |
190 | } |
191 | ||
6700c270 DM |
192 | static void ip6_rt_blackhole_update_pmtu(struct dst_entry *dst, struct sock *sk, |
193 | struct sk_buff *skb, u32 mtu) | |
14e50e57 DM |
194 | { |
195 | } | |
196 | ||
6700c270 DM |
197 | static void ip6_rt_blackhole_redirect(struct dst_entry *dst, struct sock *sk, |
198 | struct sk_buff *skb) | |
b587ee3b DM |
199 | { |
200 | } | |
201 | ||
0972ddb2 HB |
202 | static u32 *ip6_rt_blackhole_cow_metrics(struct dst_entry *dst, |
203 | unsigned long old) | |
204 | { | |
205 | return NULL; | |
206 | } | |
207 | ||
14e50e57 DM |
208 | static struct dst_ops ip6_dst_blackhole_ops = { |
209 | .family = AF_INET6, | |
09640e63 | 210 | .protocol = cpu_to_be16(ETH_P_IPV6), |
14e50e57 DM |
211 | .destroy = ip6_dst_destroy, |
212 | .check = ip6_dst_check, | |
ebb762f2 | 213 | .mtu = ip6_blackhole_mtu, |
214f45c9 | 214 | .default_advmss = ip6_default_advmss, |
14e50e57 | 215 | .update_pmtu = ip6_rt_blackhole_update_pmtu, |
b587ee3b | 216 | .redirect = ip6_rt_blackhole_redirect, |
0972ddb2 | 217 | .cow_metrics = ip6_rt_blackhole_cow_metrics, |
d3aaeb38 | 218 | .neigh_lookup = ip6_neigh_lookup, |
14e50e57 DM |
219 | }; |
220 | ||
62fa8a84 | 221 | static const u32 ip6_template_metrics[RTAX_MAX] = { |
14edd87d | 222 | [RTAX_HOPLIMIT - 1] = 0, |
62fa8a84 DM |
223 | }; |
224 | ||
fb0af4c7 | 225 | static const struct rt6_info ip6_null_entry_template = { |
d8d1f30b CG |
226 | .dst = { |
227 | .__refcnt = ATOMIC_INIT(1), | |
228 | .__use = 1, | |
2c20cbd7 | 229 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
d8d1f30b | 230 | .error = -ENETUNREACH, |
d8d1f30b CG |
231 | .input = ip6_pkt_discard, |
232 | .output = ip6_pkt_discard_out, | |
1da177e4 LT |
233 | }, |
234 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), | |
4f724279 | 235 | .rt6i_protocol = RTPROT_KERNEL, |
1da177e4 LT |
236 | .rt6i_metric = ~(u32) 0, |
237 | .rt6i_ref = ATOMIC_INIT(1), | |
238 | }; | |
239 | ||
101367c2 TG |
240 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
241 | ||
6723ab54 DM |
242 | static int ip6_pkt_prohibit(struct sk_buff *skb); |
243 | static int ip6_pkt_prohibit_out(struct sk_buff *skb); | |
6723ab54 | 244 | |
fb0af4c7 | 245 | static const struct rt6_info ip6_prohibit_entry_template = { |
d8d1f30b CG |
246 | .dst = { |
247 | .__refcnt = ATOMIC_INIT(1), | |
248 | .__use = 1, | |
2c20cbd7 | 249 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
d8d1f30b | 250 | .error = -EACCES, |
d8d1f30b CG |
251 | .input = ip6_pkt_prohibit, |
252 | .output = ip6_pkt_prohibit_out, | |
101367c2 TG |
253 | }, |
254 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), | |
4f724279 | 255 | .rt6i_protocol = RTPROT_KERNEL, |
101367c2 TG |
256 | .rt6i_metric = ~(u32) 0, |
257 | .rt6i_ref = ATOMIC_INIT(1), | |
258 | }; | |
259 | ||
fb0af4c7 | 260 | static const struct rt6_info ip6_blk_hole_entry_template = { |
d8d1f30b CG |
261 | .dst = { |
262 | .__refcnt = ATOMIC_INIT(1), | |
263 | .__use = 1, | |
2c20cbd7 | 264 | .obsolete = DST_OBSOLETE_FORCE_CHK, |
d8d1f30b | 265 | .error = -EINVAL, |
d8d1f30b CG |
266 | .input = dst_discard, |
267 | .output = dst_discard, | |
101367c2 TG |
268 | }, |
269 | .rt6i_flags = (RTF_REJECT | RTF_NONEXTHOP), | |
4f724279 | 270 | .rt6i_protocol = RTPROT_KERNEL, |
101367c2 TG |
271 | .rt6i_metric = ~(u32) 0, |
272 | .rt6i_ref = ATOMIC_INIT(1), | |
273 | }; | |
274 | ||
275 | #endif | |
276 | ||
1da177e4 | 277 | /* allocate dst with ip6_dst_ops */ |
97bab73f | 278 | static inline struct rt6_info *ip6_dst_alloc(struct net *net, |
957c665f | 279 | struct net_device *dev, |
8b96d22d DM |
280 | int flags, |
281 | struct fib6_table *table) | |
1da177e4 | 282 | { |
97bab73f | 283 | struct rt6_info *rt = dst_alloc(&net->ipv6.ip6_dst_ops, dev, |
6f3118b5 | 284 | 0, DST_OBSOLETE_FORCE_CHK, flags); |
cf911662 | 285 | |
97bab73f | 286 | if (rt) { |
8104891b SK |
287 | struct dst_entry *dst = &rt->dst; |
288 | ||
289 | memset(dst + 1, 0, sizeof(*rt) - sizeof(*dst)); | |
8b96d22d | 290 | rt6_init_peer(rt, table ? &table->tb6_peers : net->ipv6.peers); |
6f3118b5 | 291 | rt->rt6i_genid = rt_genid(net); |
97bab73f | 292 | } |
cf911662 | 293 | return rt; |
1da177e4 LT |
294 | } |
295 | ||
296 | static void ip6_dst_destroy(struct dst_entry *dst) | |
297 | { | |
298 | struct rt6_info *rt = (struct rt6_info *)dst; | |
299 | struct inet6_dev *idev = rt->rt6i_idev; | |
300 | ||
97cac082 DM |
301 | if (rt->n) |
302 | neigh_release(rt->n); | |
303 | ||
8e2ec639 YZ |
304 | if (!(rt->dst.flags & DST_HOST)) |
305 | dst_destroy_metrics_generic(dst); | |
306 | ||
38308473 | 307 | if (idev) { |
1da177e4 LT |
308 | rt->rt6i_idev = NULL; |
309 | in6_dev_put(idev); | |
1ab1457c | 310 | } |
1716a961 G |
311 | |
312 | if (!(rt->rt6i_flags & RTF_EXPIRES) && dst->from) | |
313 | dst_release(dst->from); | |
314 | ||
97bab73f DM |
315 | if (rt6_has_peer(rt)) { |
316 | struct inet_peer *peer = rt6_peer_ptr(rt); | |
b3419363 DM |
317 | inet_putpeer(peer); |
318 | } | |
319 | } | |
320 | ||
6431cbc2 DM |
321 | static atomic_t __rt6_peer_genid = ATOMIC_INIT(0); |
322 | ||
323 | static u32 rt6_peer_genid(void) | |
324 | { | |
325 | return atomic_read(&__rt6_peer_genid); | |
326 | } | |
327 | ||
b3419363 DM |
328 | void rt6_bind_peer(struct rt6_info *rt, int create) |
329 | { | |
97bab73f | 330 | struct inet_peer_base *base; |
b3419363 DM |
331 | struct inet_peer *peer; |
332 | ||
97bab73f DM |
333 | base = inetpeer_base_ptr(rt->_rt6i_peer); |
334 | if (!base) | |
335 | return; | |
336 | ||
337 | peer = inet_getpeer_v6(base, &rt->rt6i_dst.addr, create); | |
7b34ca2a DM |
338 | if (peer) { |
339 | if (!rt6_set_peer(rt, peer)) | |
340 | inet_putpeer(peer); | |
341 | else | |
342 | rt->rt6i_peer_genid = rt6_peer_genid(); | |
343 | } | |
1da177e4 LT |
344 | } |
345 | ||
346 | static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev, | |
347 | int how) | |
348 | { | |
349 | struct rt6_info *rt = (struct rt6_info *)dst; | |
350 | struct inet6_dev *idev = rt->rt6i_idev; | |
5a3e55d6 | 351 | struct net_device *loopback_dev = |
c346dca1 | 352 | dev_net(dev)->loopback_dev; |
1da177e4 | 353 | |
97cac082 DM |
354 | if (dev != loopback_dev) { |
355 | if (idev && idev->dev == dev) { | |
356 | struct inet6_dev *loopback_idev = | |
357 | in6_dev_get(loopback_dev); | |
358 | if (loopback_idev) { | |
359 | rt->rt6i_idev = loopback_idev; | |
360 | in6_dev_put(idev); | |
361 | } | |
362 | } | |
363 | if (rt->n && rt->n->dev == dev) { | |
364 | rt->n->dev = loopback_dev; | |
365 | dev_hold(loopback_dev); | |
366 | dev_put(dev); | |
1da177e4 LT |
367 | } |
368 | } | |
369 | } | |
370 | ||
a50feda5 | 371 | static bool rt6_check_expired(const struct rt6_info *rt) |
1da177e4 | 372 | { |
1716a961 G |
373 | if (rt->rt6i_flags & RTF_EXPIRES) { |
374 | if (time_after(jiffies, rt->dst.expires)) | |
a50feda5 | 375 | return true; |
1716a961 | 376 | } else if (rt->dst.from) { |
3fd91fb3 | 377 | return rt6_check_expired((struct rt6_info *) rt->dst.from); |
1716a961 | 378 | } |
a50feda5 | 379 | return false; |
1da177e4 LT |
380 | } |
381 | ||
a50feda5 | 382 | static bool rt6_need_strict(const struct in6_addr *daddr) |
c71099ac | 383 | { |
a02cec21 ED |
384 | return ipv6_addr_type(daddr) & |
385 | (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); | |
c71099ac TG |
386 | } |
387 | ||
1da177e4 | 388 | /* |
c71099ac | 389 | * Route lookup. Any table->tb6_lock is implied. |
1da177e4 LT |
390 | */ |
391 | ||
8ed67789 DL |
392 | static inline struct rt6_info *rt6_device_match(struct net *net, |
393 | struct rt6_info *rt, | |
b71d1d42 | 394 | const struct in6_addr *saddr, |
1da177e4 | 395 | int oif, |
d420895e | 396 | int flags) |
1da177e4 LT |
397 | { |
398 | struct rt6_info *local = NULL; | |
399 | struct rt6_info *sprt; | |
400 | ||
dd3abc4e YH |
401 | if (!oif && ipv6_addr_any(saddr)) |
402 | goto out; | |
403 | ||
d8d1f30b | 404 | for (sprt = rt; sprt; sprt = sprt->dst.rt6_next) { |
d1918542 | 405 | struct net_device *dev = sprt->dst.dev; |
dd3abc4e YH |
406 | |
407 | if (oif) { | |
1da177e4 LT |
408 | if (dev->ifindex == oif) |
409 | return sprt; | |
410 | if (dev->flags & IFF_LOOPBACK) { | |
38308473 | 411 | if (!sprt->rt6i_idev || |
1da177e4 | 412 | sprt->rt6i_idev->dev->ifindex != oif) { |
d420895e | 413 | if (flags & RT6_LOOKUP_F_IFACE && oif) |
1da177e4 | 414 | continue; |
1ab1457c | 415 | if (local && (!oif || |
1da177e4 LT |
416 | local->rt6i_idev->dev->ifindex == oif)) |
417 | continue; | |
418 | } | |
419 | local = sprt; | |
420 | } | |
dd3abc4e YH |
421 | } else { |
422 | if (ipv6_chk_addr(net, saddr, dev, | |
423 | flags & RT6_LOOKUP_F_IFACE)) | |
424 | return sprt; | |
1da177e4 | 425 | } |
dd3abc4e | 426 | } |
1da177e4 | 427 | |
dd3abc4e | 428 | if (oif) { |
1da177e4 LT |
429 | if (local) |
430 | return local; | |
431 | ||
d420895e | 432 | if (flags & RT6_LOOKUP_F_IFACE) |
8ed67789 | 433 | return net->ipv6.ip6_null_entry; |
1da177e4 | 434 | } |
dd3abc4e | 435 | out: |
1da177e4 LT |
436 | return rt; |
437 | } | |
438 | ||
27097255 YH |
439 | #ifdef CONFIG_IPV6_ROUTER_PREF |
440 | static void rt6_probe(struct rt6_info *rt) | |
441 | { | |
f2c31e32 | 442 | struct neighbour *neigh; |
27097255 YH |
443 | /* |
444 | * Okay, this does not seem to be appropriate | |
445 | * for now, however, we need to check if it | |
446 | * is really so; aka Router Reachability Probing. | |
447 | * | |
448 | * Router Reachability Probe MUST be rate-limited | |
449 | * to no more than one per minute. | |
450 | */ | |
97cac082 | 451 | neigh = rt ? rt->n : NULL; |
27097255 | 452 | if (!neigh || (neigh->nud_state & NUD_VALID)) |
fdd6681d | 453 | return; |
27097255 YH |
454 | read_lock_bh(&neigh->lock); |
455 | if (!(neigh->nud_state & NUD_VALID) && | |
52e16356 | 456 | time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) { |
27097255 YH |
457 | struct in6_addr mcaddr; |
458 | struct in6_addr *target; | |
459 | ||
460 | neigh->updated = jiffies; | |
461 | read_unlock_bh(&neigh->lock); | |
462 | ||
463 | target = (struct in6_addr *)&neigh->primary_key; | |
464 | addrconf_addr_solict_mult(target, &mcaddr); | |
d1918542 | 465 | ndisc_send_ns(rt->dst.dev, NULL, target, &mcaddr, NULL); |
f2c31e32 | 466 | } else { |
27097255 | 467 | read_unlock_bh(&neigh->lock); |
f2c31e32 | 468 | } |
27097255 YH |
469 | } |
470 | #else | |
471 | static inline void rt6_probe(struct rt6_info *rt) | |
472 | { | |
27097255 YH |
473 | } |
474 | #endif | |
475 | ||
1da177e4 | 476 | /* |
554cfb7e | 477 | * Default Router Selection (RFC 2461 6.3.6) |
1da177e4 | 478 | */ |
b6f99a21 | 479 | static inline int rt6_check_dev(struct rt6_info *rt, int oif) |
554cfb7e | 480 | { |
d1918542 | 481 | struct net_device *dev = rt->dst.dev; |
161980f4 | 482 | if (!oif || dev->ifindex == oif) |
554cfb7e | 483 | return 2; |
161980f4 DM |
484 | if ((dev->flags & IFF_LOOPBACK) && |
485 | rt->rt6i_idev && rt->rt6i_idev->dev->ifindex == oif) | |
486 | return 1; | |
487 | return 0; | |
554cfb7e | 488 | } |
1da177e4 | 489 | |
b6f99a21 | 490 | static inline int rt6_check_neigh(struct rt6_info *rt) |
1da177e4 | 491 | { |
f2c31e32 | 492 | struct neighbour *neigh; |
398bcbeb | 493 | int m; |
f2c31e32 | 494 | |
97cac082 | 495 | neigh = rt->n; |
4d0c5911 YH |
496 | if (rt->rt6i_flags & RTF_NONEXTHOP || |
497 | !(rt->rt6i_flags & RTF_GATEWAY)) | |
498 | m = 1; | |
499 | else if (neigh) { | |
554cfb7e YH |
500 | read_lock_bh(&neigh->lock); |
501 | if (neigh->nud_state & NUD_VALID) | |
4d0c5911 | 502 | m = 2; |
398bcbeb YH |
503 | #ifdef CONFIG_IPV6_ROUTER_PREF |
504 | else if (neigh->nud_state & NUD_FAILED) | |
505 | m = 0; | |
506 | #endif | |
507 | else | |
ea73ee23 | 508 | m = 1; |
554cfb7e | 509 | read_unlock_bh(&neigh->lock); |
398bcbeb YH |
510 | } else |
511 | m = 0; | |
554cfb7e | 512 | return m; |
1da177e4 LT |
513 | } |
514 | ||
554cfb7e YH |
515 | static int rt6_score_route(struct rt6_info *rt, int oif, |
516 | int strict) | |
1da177e4 | 517 | { |
4d0c5911 | 518 | int m, n; |
1ab1457c | 519 | |
4d0c5911 | 520 | m = rt6_check_dev(rt, oif); |
77d16f45 | 521 | if (!m && (strict & RT6_LOOKUP_F_IFACE)) |
554cfb7e | 522 | return -1; |
ebacaaa0 YH |
523 | #ifdef CONFIG_IPV6_ROUTER_PREF |
524 | m |= IPV6_DECODE_PREF(IPV6_EXTRACT_PREF(rt->rt6i_flags)) << 2; | |
525 | #endif | |
4d0c5911 | 526 | n = rt6_check_neigh(rt); |
557e92ef | 527 | if (!n && (strict & RT6_LOOKUP_F_REACHABLE)) |
554cfb7e YH |
528 | return -1; |
529 | return m; | |
530 | } | |
531 | ||
f11e6659 DM |
532 | static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict, |
533 | int *mpri, struct rt6_info *match) | |
554cfb7e | 534 | { |
f11e6659 DM |
535 | int m; |
536 | ||
537 | if (rt6_check_expired(rt)) | |
538 | goto out; | |
539 | ||
540 | m = rt6_score_route(rt, oif, strict); | |
541 | if (m < 0) | |
542 | goto out; | |
543 | ||
544 | if (m > *mpri) { | |
545 | if (strict & RT6_LOOKUP_F_REACHABLE) | |
546 | rt6_probe(match); | |
547 | *mpri = m; | |
548 | match = rt; | |
549 | } else if (strict & RT6_LOOKUP_F_REACHABLE) { | |
550 | rt6_probe(rt); | |
551 | } | |
552 | ||
553 | out: | |
554 | return match; | |
555 | } | |
556 | ||
557 | static struct rt6_info *find_rr_leaf(struct fib6_node *fn, | |
558 | struct rt6_info *rr_head, | |
559 | u32 metric, int oif, int strict) | |
560 | { | |
561 | struct rt6_info *rt, *match; | |
554cfb7e | 562 | int mpri = -1; |
1da177e4 | 563 | |
f11e6659 DM |
564 | match = NULL; |
565 | for (rt = rr_head; rt && rt->rt6i_metric == metric; | |
d8d1f30b | 566 | rt = rt->dst.rt6_next) |
f11e6659 DM |
567 | match = find_match(rt, oif, strict, &mpri, match); |
568 | for (rt = fn->leaf; rt && rt != rr_head && rt->rt6i_metric == metric; | |
d8d1f30b | 569 | rt = rt->dst.rt6_next) |
f11e6659 | 570 | match = find_match(rt, oif, strict, &mpri, match); |
1da177e4 | 571 | |
f11e6659 DM |
572 | return match; |
573 | } | |
1da177e4 | 574 | |
f11e6659 DM |
575 | static struct rt6_info *rt6_select(struct fib6_node *fn, int oif, int strict) |
576 | { | |
577 | struct rt6_info *match, *rt0; | |
8ed67789 | 578 | struct net *net; |
1da177e4 | 579 | |
f11e6659 DM |
580 | rt0 = fn->rr_ptr; |
581 | if (!rt0) | |
582 | fn->rr_ptr = rt0 = fn->leaf; | |
1da177e4 | 583 | |
f11e6659 | 584 | match = find_rr_leaf(fn, rt0, rt0->rt6i_metric, oif, strict); |
1da177e4 | 585 | |
554cfb7e | 586 | if (!match && |
f11e6659 | 587 | (strict & RT6_LOOKUP_F_REACHABLE)) { |
d8d1f30b | 588 | struct rt6_info *next = rt0->dst.rt6_next; |
f11e6659 | 589 | |
554cfb7e | 590 | /* no entries matched; do round-robin */ |
f11e6659 DM |
591 | if (!next || next->rt6i_metric != rt0->rt6i_metric) |
592 | next = fn->leaf; | |
593 | ||
594 | if (next != rt0) | |
595 | fn->rr_ptr = next; | |
1da177e4 | 596 | } |
1da177e4 | 597 | |
d1918542 | 598 | net = dev_net(rt0->dst.dev); |
a02cec21 | 599 | return match ? match : net->ipv6.ip6_null_entry; |
1da177e4 LT |
600 | } |
601 | ||
70ceb4f5 YH |
602 | #ifdef CONFIG_IPV6_ROUTE_INFO |
603 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, | |
b71d1d42 | 604 | const struct in6_addr *gwaddr) |
70ceb4f5 | 605 | { |
c346dca1 | 606 | struct net *net = dev_net(dev); |
70ceb4f5 YH |
607 | struct route_info *rinfo = (struct route_info *) opt; |
608 | struct in6_addr prefix_buf, *prefix; | |
609 | unsigned int pref; | |
4bed72e4 | 610 | unsigned long lifetime; |
70ceb4f5 YH |
611 | struct rt6_info *rt; |
612 | ||
613 | if (len < sizeof(struct route_info)) { | |
614 | return -EINVAL; | |
615 | } | |
616 | ||
617 | /* Sanity check for prefix_len and length */ | |
618 | if (rinfo->length > 3) { | |
619 | return -EINVAL; | |
620 | } else if (rinfo->prefix_len > 128) { | |
621 | return -EINVAL; | |
622 | } else if (rinfo->prefix_len > 64) { | |
623 | if (rinfo->length < 2) { | |
624 | return -EINVAL; | |
625 | } | |
626 | } else if (rinfo->prefix_len > 0) { | |
627 | if (rinfo->length < 1) { | |
628 | return -EINVAL; | |
629 | } | |
630 | } | |
631 | ||
632 | pref = rinfo->route_pref; | |
633 | if (pref == ICMPV6_ROUTER_PREF_INVALID) | |
3933fc95 | 634 | return -EINVAL; |
70ceb4f5 | 635 | |
4bed72e4 | 636 | lifetime = addrconf_timeout_fixup(ntohl(rinfo->lifetime), HZ); |
70ceb4f5 YH |
637 | |
638 | if (rinfo->length == 3) | |
639 | prefix = (struct in6_addr *)rinfo->prefix; | |
640 | else { | |
641 | /* this function is safe */ | |
642 | ipv6_addr_prefix(&prefix_buf, | |
643 | (struct in6_addr *)rinfo->prefix, | |
644 | rinfo->prefix_len); | |
645 | prefix = &prefix_buf; | |
646 | } | |
647 | ||
efa2cea0 DL |
648 | rt = rt6_get_route_info(net, prefix, rinfo->prefix_len, gwaddr, |
649 | dev->ifindex); | |
70ceb4f5 YH |
650 | |
651 | if (rt && !lifetime) { | |
e0a1ad73 | 652 | ip6_del_rt(rt); |
70ceb4f5 YH |
653 | rt = NULL; |
654 | } | |
655 | ||
656 | if (!rt && lifetime) | |
efa2cea0 | 657 | rt = rt6_add_route_info(net, prefix, rinfo->prefix_len, gwaddr, dev->ifindex, |
70ceb4f5 YH |
658 | pref); |
659 | else if (rt) | |
660 | rt->rt6i_flags = RTF_ROUTEINFO | | |
661 | (rt->rt6i_flags & ~RTF_PREF_MASK) | RTF_PREF(pref); | |
662 | ||
663 | if (rt) { | |
1716a961 G |
664 | if (!addrconf_finite_timeout(lifetime)) |
665 | rt6_clean_expires(rt); | |
666 | else | |
667 | rt6_set_expires(rt, jiffies + HZ * lifetime); | |
668 | ||
d8d1f30b | 669 | dst_release(&rt->dst); |
70ceb4f5 YH |
670 | } |
671 | return 0; | |
672 | } | |
673 | #endif | |
674 | ||
8ed67789 | 675 | #define BACKTRACK(__net, saddr) \ |
982f56f3 | 676 | do { \ |
8ed67789 | 677 | if (rt == __net->ipv6.ip6_null_entry) { \ |
982f56f3 | 678 | struct fib6_node *pn; \ |
e0eda7bb | 679 | while (1) { \ |
982f56f3 YH |
680 | if (fn->fn_flags & RTN_TL_ROOT) \ |
681 | goto out; \ | |
682 | pn = fn->parent; \ | |
683 | if (FIB6_SUBTREE(pn) && FIB6_SUBTREE(pn) != fn) \ | |
8bce65b9 | 684 | fn = fib6_lookup(FIB6_SUBTREE(pn), NULL, saddr); \ |
982f56f3 YH |
685 | else \ |
686 | fn = pn; \ | |
687 | if (fn->fn_flags & RTN_RTINFO) \ | |
688 | goto restart; \ | |
c71099ac | 689 | } \ |
c71099ac | 690 | } \ |
38308473 | 691 | } while (0) |
c71099ac | 692 | |
8ed67789 DL |
693 | static struct rt6_info *ip6_pol_route_lookup(struct net *net, |
694 | struct fib6_table *table, | |
4c9483b2 | 695 | struct flowi6 *fl6, int flags) |
1da177e4 LT |
696 | { |
697 | struct fib6_node *fn; | |
698 | struct rt6_info *rt; | |
699 | ||
c71099ac | 700 | read_lock_bh(&table->tb6_lock); |
4c9483b2 | 701 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
c71099ac TG |
702 | restart: |
703 | rt = fn->leaf; | |
4c9483b2 DM |
704 | rt = rt6_device_match(net, rt, &fl6->saddr, fl6->flowi6_oif, flags); |
705 | BACKTRACK(net, &fl6->saddr); | |
c71099ac | 706 | out: |
d8d1f30b | 707 | dst_use(&rt->dst, jiffies); |
c71099ac | 708 | read_unlock_bh(&table->tb6_lock); |
c71099ac TG |
709 | return rt; |
710 | ||
711 | } | |
712 | ||
ea6e574e FW |
713 | struct dst_entry * ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
714 | int flags) | |
715 | { | |
716 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_lookup); | |
717 | } | |
718 | EXPORT_SYMBOL_GPL(ip6_route_lookup); | |
719 | ||
9acd9f3a YH |
720 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
721 | const struct in6_addr *saddr, int oif, int strict) | |
c71099ac | 722 | { |
4c9483b2 DM |
723 | struct flowi6 fl6 = { |
724 | .flowi6_oif = oif, | |
725 | .daddr = *daddr, | |
c71099ac TG |
726 | }; |
727 | struct dst_entry *dst; | |
77d16f45 | 728 | int flags = strict ? RT6_LOOKUP_F_IFACE : 0; |
c71099ac | 729 | |
adaa70bb | 730 | if (saddr) { |
4c9483b2 | 731 | memcpy(&fl6.saddr, saddr, sizeof(*saddr)); |
adaa70bb TG |
732 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
733 | } | |
734 | ||
4c9483b2 | 735 | dst = fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_lookup); |
c71099ac TG |
736 | if (dst->error == 0) |
737 | return (struct rt6_info *) dst; | |
738 | ||
739 | dst_release(dst); | |
740 | ||
1da177e4 LT |
741 | return NULL; |
742 | } | |
743 | ||
7159039a YH |
744 | EXPORT_SYMBOL(rt6_lookup); |
745 | ||
c71099ac | 746 | /* ip6_ins_rt is called with FREE table->tb6_lock. |
1da177e4 LT |
747 | It takes new route entry, the addition fails by any reason the |
748 | route is freed. In any case, if caller does not hold it, it may | |
749 | be destroyed. | |
750 | */ | |
751 | ||
86872cb5 | 752 | static int __ip6_ins_rt(struct rt6_info *rt, struct nl_info *info) |
1da177e4 LT |
753 | { |
754 | int err; | |
c71099ac | 755 | struct fib6_table *table; |
1da177e4 | 756 | |
c71099ac TG |
757 | table = rt->rt6i_table; |
758 | write_lock_bh(&table->tb6_lock); | |
86872cb5 | 759 | err = fib6_add(&table->tb6_root, rt, info); |
c71099ac | 760 | write_unlock_bh(&table->tb6_lock); |
1da177e4 LT |
761 | |
762 | return err; | |
763 | } | |
764 | ||
40e22e8f TG |
765 | int ip6_ins_rt(struct rt6_info *rt) |
766 | { | |
4d1169c1 | 767 | struct nl_info info = { |
d1918542 | 768 | .nl_net = dev_net(rt->dst.dev), |
4d1169c1 | 769 | }; |
528c4ceb | 770 | return __ip6_ins_rt(rt, &info); |
40e22e8f TG |
771 | } |
772 | ||
1716a961 | 773 | static struct rt6_info *rt6_alloc_cow(struct rt6_info *ort, |
21efcfa0 | 774 | const struct in6_addr *daddr, |
b71d1d42 | 775 | const struct in6_addr *saddr) |
1da177e4 | 776 | { |
1da177e4 LT |
777 | struct rt6_info *rt; |
778 | ||
779 | /* | |
780 | * Clone the route. | |
781 | */ | |
782 | ||
21efcfa0 | 783 | rt = ip6_rt_copy(ort, daddr); |
1da177e4 LT |
784 | |
785 | if (rt) { | |
14deae41 DM |
786 | int attempts = !in_softirq(); |
787 | ||
38308473 | 788 | if (!(rt->rt6i_flags & RTF_GATEWAY)) { |
bb3c3686 | 789 | if (ort->rt6i_dst.plen != 128 && |
21efcfa0 | 790 | ipv6_addr_equal(&ort->rt6i_dst.addr, daddr)) |
58c4fb86 | 791 | rt->rt6i_flags |= RTF_ANYCAST; |
4e3fd7a0 | 792 | rt->rt6i_gateway = *daddr; |
58c4fb86 | 793 | } |
1da177e4 | 794 | |
1da177e4 | 795 | rt->rt6i_flags |= RTF_CACHE; |
1da177e4 LT |
796 | |
797 | #ifdef CONFIG_IPV6_SUBTREES | |
798 | if (rt->rt6i_src.plen && saddr) { | |
4e3fd7a0 | 799 | rt->rt6i_src.addr = *saddr; |
1da177e4 LT |
800 | rt->rt6i_src.plen = 128; |
801 | } | |
802 | #endif | |
803 | ||
14deae41 | 804 | retry: |
8ade06c6 | 805 | if (rt6_bind_neighbour(rt, rt->dst.dev)) { |
d1918542 | 806 | struct net *net = dev_net(rt->dst.dev); |
14deae41 DM |
807 | int saved_rt_min_interval = |
808 | net->ipv6.sysctl.ip6_rt_gc_min_interval; | |
809 | int saved_rt_elasticity = | |
810 | net->ipv6.sysctl.ip6_rt_gc_elasticity; | |
811 | ||
812 | if (attempts-- > 0) { | |
813 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 1; | |
814 | net->ipv6.sysctl.ip6_rt_gc_min_interval = 0; | |
815 | ||
86393e52 | 816 | ip6_dst_gc(&net->ipv6.ip6_dst_ops); |
14deae41 DM |
817 | |
818 | net->ipv6.sysctl.ip6_rt_gc_elasticity = | |
819 | saved_rt_elasticity; | |
820 | net->ipv6.sysctl.ip6_rt_gc_min_interval = | |
821 | saved_rt_min_interval; | |
822 | goto retry; | |
823 | } | |
824 | ||
f3213831 | 825 | net_warn_ratelimited("Neighbour table overflow\n"); |
d8d1f30b | 826 | dst_free(&rt->dst); |
14deae41 DM |
827 | return NULL; |
828 | } | |
95a9a5ba | 829 | } |
1da177e4 | 830 | |
95a9a5ba YH |
831 | return rt; |
832 | } | |
1da177e4 | 833 | |
21efcfa0 ED |
834 | static struct rt6_info *rt6_alloc_clone(struct rt6_info *ort, |
835 | const struct in6_addr *daddr) | |
299d9939 | 836 | { |
21efcfa0 ED |
837 | struct rt6_info *rt = ip6_rt_copy(ort, daddr); |
838 | ||
299d9939 | 839 | if (rt) { |
299d9939 | 840 | rt->rt6i_flags |= RTF_CACHE; |
97cac082 | 841 | rt->n = neigh_clone(ort->n); |
299d9939 YH |
842 | } |
843 | return rt; | |
844 | } | |
845 | ||
8ed67789 | 846 | static struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, int oif, |
4c9483b2 | 847 | struct flowi6 *fl6, int flags) |
1da177e4 LT |
848 | { |
849 | struct fib6_node *fn; | |
519fbd87 | 850 | struct rt6_info *rt, *nrt; |
c71099ac | 851 | int strict = 0; |
1da177e4 | 852 | int attempts = 3; |
519fbd87 | 853 | int err; |
53b7997f | 854 | int reachable = net->ipv6.devconf_all->forwarding ? 0 : RT6_LOOKUP_F_REACHABLE; |
1da177e4 | 855 | |
77d16f45 | 856 | strict |= flags & RT6_LOOKUP_F_IFACE; |
1da177e4 LT |
857 | |
858 | relookup: | |
c71099ac | 859 | read_lock_bh(&table->tb6_lock); |
1da177e4 | 860 | |
8238dd06 | 861 | restart_2: |
4c9483b2 | 862 | fn = fib6_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr); |
1da177e4 LT |
863 | |
864 | restart: | |
4acad72d | 865 | rt = rt6_select(fn, oif, strict | reachable); |
8ed67789 | 866 | |
4c9483b2 | 867 | BACKTRACK(net, &fl6->saddr); |
8ed67789 | 868 | if (rt == net->ipv6.ip6_null_entry || |
8238dd06 | 869 | rt->rt6i_flags & RTF_CACHE) |
1ddef044 | 870 | goto out; |
1da177e4 | 871 | |
d8d1f30b | 872 | dst_hold(&rt->dst); |
c71099ac | 873 | read_unlock_bh(&table->tb6_lock); |
fb9de91e | 874 | |
97cac082 | 875 | if (!rt->n && !(rt->rt6i_flags & RTF_NONEXTHOP)) |
4c9483b2 | 876 | nrt = rt6_alloc_cow(rt, &fl6->daddr, &fl6->saddr); |
7343ff31 | 877 | else if (!(rt->dst.flags & DST_HOST)) |
4c9483b2 | 878 | nrt = rt6_alloc_clone(rt, &fl6->daddr); |
7343ff31 DM |
879 | else |
880 | goto out2; | |
e40cf353 | 881 | |
d8d1f30b | 882 | dst_release(&rt->dst); |
8ed67789 | 883 | rt = nrt ? : net->ipv6.ip6_null_entry; |
1da177e4 | 884 | |
d8d1f30b | 885 | dst_hold(&rt->dst); |
519fbd87 | 886 | if (nrt) { |
40e22e8f | 887 | err = ip6_ins_rt(nrt); |
519fbd87 | 888 | if (!err) |
1da177e4 | 889 | goto out2; |
1da177e4 | 890 | } |
1da177e4 | 891 | |
519fbd87 YH |
892 | if (--attempts <= 0) |
893 | goto out2; | |
894 | ||
895 | /* | |
c71099ac | 896 | * Race condition! In the gap, when table->tb6_lock was |
519fbd87 YH |
897 | * released someone could insert this route. Relookup. |
898 | */ | |
d8d1f30b | 899 | dst_release(&rt->dst); |
519fbd87 YH |
900 | goto relookup; |
901 | ||
902 | out: | |
8238dd06 YH |
903 | if (reachable) { |
904 | reachable = 0; | |
905 | goto restart_2; | |
906 | } | |
d8d1f30b | 907 | dst_hold(&rt->dst); |
c71099ac | 908 | read_unlock_bh(&table->tb6_lock); |
1da177e4 | 909 | out2: |
d8d1f30b CG |
910 | rt->dst.lastuse = jiffies; |
911 | rt->dst.__use++; | |
c71099ac TG |
912 | |
913 | return rt; | |
1da177e4 LT |
914 | } |
915 | ||
8ed67789 | 916 | static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *table, |
4c9483b2 | 917 | struct flowi6 *fl6, int flags) |
4acad72d | 918 | { |
4c9483b2 | 919 | return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags); |
4acad72d PE |
920 | } |
921 | ||
72331bc0 SL |
922 | static struct dst_entry *ip6_route_input_lookup(struct net *net, |
923 | struct net_device *dev, | |
924 | struct flowi6 *fl6, int flags) | |
925 | { | |
926 | if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG) | |
927 | flags |= RT6_LOOKUP_F_IFACE; | |
928 | ||
929 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input); | |
930 | } | |
931 | ||
c71099ac TG |
932 | void ip6_route_input(struct sk_buff *skb) |
933 | { | |
b71d1d42 | 934 | const struct ipv6hdr *iph = ipv6_hdr(skb); |
c346dca1 | 935 | struct net *net = dev_net(skb->dev); |
adaa70bb | 936 | int flags = RT6_LOOKUP_F_HAS_SADDR; |
4c9483b2 DM |
937 | struct flowi6 fl6 = { |
938 | .flowi6_iif = skb->dev->ifindex, | |
939 | .daddr = iph->daddr, | |
940 | .saddr = iph->saddr, | |
38308473 | 941 | .flowlabel = (* (__be32 *) iph) & IPV6_FLOWINFO_MASK, |
4c9483b2 DM |
942 | .flowi6_mark = skb->mark, |
943 | .flowi6_proto = iph->nexthdr, | |
c71099ac | 944 | }; |
adaa70bb | 945 | |
72331bc0 | 946 | skb_dst_set(skb, ip6_route_input_lookup(net, skb->dev, &fl6, flags)); |
c71099ac TG |
947 | } |
948 | ||
8ed67789 | 949 | static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table, |
4c9483b2 | 950 | struct flowi6 *fl6, int flags) |
1da177e4 | 951 | { |
4c9483b2 | 952 | return ip6_pol_route(net, table, fl6->flowi6_oif, fl6, flags); |
c71099ac TG |
953 | } |
954 | ||
9c7a4f9c | 955 | struct dst_entry * ip6_route_output(struct net *net, const struct sock *sk, |
4c9483b2 | 956 | struct flowi6 *fl6) |
c71099ac TG |
957 | { |
958 | int flags = 0; | |
959 | ||
1fb9489b | 960 | fl6->flowi6_iif = LOOPBACK_IFINDEX; |
4dc27d1c | 961 | |
4c9483b2 | 962 | if ((sk && sk->sk_bound_dev_if) || rt6_need_strict(&fl6->daddr)) |
77d16f45 | 963 | flags |= RT6_LOOKUP_F_IFACE; |
c71099ac | 964 | |
4c9483b2 | 965 | if (!ipv6_addr_any(&fl6->saddr)) |
adaa70bb | 966 | flags |= RT6_LOOKUP_F_HAS_SADDR; |
0c9a2ac1 YH |
967 | else if (sk) |
968 | flags |= rt6_srcprefs2flags(inet6_sk(sk)->srcprefs); | |
adaa70bb | 969 | |
4c9483b2 | 970 | return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_output); |
1da177e4 LT |
971 | } |
972 | ||
7159039a | 973 | EXPORT_SYMBOL(ip6_route_output); |
1da177e4 | 974 | |
2774c131 | 975 | struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig) |
14e50e57 | 976 | { |
5c1e6aa3 | 977 | struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig; |
14e50e57 DM |
978 | struct dst_entry *new = NULL; |
979 | ||
f5b0a874 | 980 | rt = dst_alloc(&ip6_dst_blackhole_ops, ort->dst.dev, 1, DST_OBSOLETE_NONE, 0); |
14e50e57 | 981 | if (rt) { |
d8d1f30b | 982 | new = &rt->dst; |
14e50e57 | 983 | |
8104891b SK |
984 | memset(new + 1, 0, sizeof(*rt) - sizeof(*new)); |
985 | rt6_init_peer(rt, net->ipv6.peers); | |
986 | ||
14e50e57 | 987 | new->__use = 1; |
352e512c HX |
988 | new->input = dst_discard; |
989 | new->output = dst_discard; | |
14e50e57 | 990 | |
21efcfa0 ED |
991 | if (dst_metrics_read_only(&ort->dst)) |
992 | new->_metrics = ort->dst._metrics; | |
993 | else | |
994 | dst_copy_metrics(new, &ort->dst); | |
14e50e57 DM |
995 | rt->rt6i_idev = ort->rt6i_idev; |
996 | if (rt->rt6i_idev) | |
997 | in6_dev_hold(rt->rt6i_idev); | |
14e50e57 | 998 | |
4e3fd7a0 | 999 | rt->rt6i_gateway = ort->rt6i_gateway; |
1716a961 G |
1000 | rt->rt6i_flags = ort->rt6i_flags; |
1001 | rt6_clean_expires(rt); | |
14e50e57 DM |
1002 | rt->rt6i_metric = 0; |
1003 | ||
1004 | memcpy(&rt->rt6i_dst, &ort->rt6i_dst, sizeof(struct rt6key)); | |
1005 | #ifdef CONFIG_IPV6_SUBTREES | |
1006 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); | |
1007 | #endif | |
1008 | ||
1009 | dst_free(new); | |
1010 | } | |
1011 | ||
69ead7af DM |
1012 | dst_release(dst_orig); |
1013 | return new ? new : ERR_PTR(-ENOMEM); | |
14e50e57 | 1014 | } |
14e50e57 | 1015 | |
1da177e4 LT |
1016 | /* |
1017 | * Destination cache support functions | |
1018 | */ | |
1019 | ||
1020 | static struct dst_entry *ip6_dst_check(struct dst_entry *dst, u32 cookie) | |
1021 | { | |
1022 | struct rt6_info *rt; | |
1023 | ||
1024 | rt = (struct rt6_info *) dst; | |
1025 | ||
6f3118b5 ND |
1026 | /* All IPV6 dsts are created with ->obsolete set to the value |
1027 | * DST_OBSOLETE_FORCE_CHK which forces validation calls down | |
1028 | * into this function always. | |
1029 | */ | |
1030 | if (rt->rt6i_genid != rt_genid(dev_net(rt->dst.dev))) | |
1031 | return NULL; | |
1032 | ||
6431cbc2 DM |
1033 | if (rt->rt6i_node && (rt->rt6i_node->fn_sernum == cookie)) { |
1034 | if (rt->rt6i_peer_genid != rt6_peer_genid()) { | |
97bab73f | 1035 | if (!rt6_has_peer(rt)) |
6431cbc2 DM |
1036 | rt6_bind_peer(rt, 0); |
1037 | rt->rt6i_peer_genid = rt6_peer_genid(); | |
1038 | } | |
1da177e4 | 1039 | return dst; |
6431cbc2 | 1040 | } |
1da177e4 LT |
1041 | return NULL; |
1042 | } | |
1043 | ||
1044 | static struct dst_entry *ip6_negative_advice(struct dst_entry *dst) | |
1045 | { | |
1046 | struct rt6_info *rt = (struct rt6_info *) dst; | |
1047 | ||
1048 | if (rt) { | |
54c1a859 YH |
1049 | if (rt->rt6i_flags & RTF_CACHE) { |
1050 | if (rt6_check_expired(rt)) { | |
1051 | ip6_del_rt(rt); | |
1052 | dst = NULL; | |
1053 | } | |
1054 | } else { | |
1da177e4 | 1055 | dst_release(dst); |
54c1a859 YH |
1056 | dst = NULL; |
1057 | } | |
1da177e4 | 1058 | } |
54c1a859 | 1059 | return dst; |
1da177e4 LT |
1060 | } |
1061 | ||
1062 | static void ip6_link_failure(struct sk_buff *skb) | |
1063 | { | |
1064 | struct rt6_info *rt; | |
1065 | ||
3ffe533c | 1066 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); |
1da177e4 | 1067 | |
adf30907 | 1068 | rt = (struct rt6_info *) skb_dst(skb); |
1da177e4 | 1069 | if (rt) { |
1716a961 G |
1070 | if (rt->rt6i_flags & RTF_CACHE) |
1071 | rt6_update_expires(rt, 0); | |
1072 | else if (rt->rt6i_node && (rt->rt6i_flags & RTF_DEFAULT)) | |
1da177e4 LT |
1073 | rt->rt6i_node->fn_sernum = -1; |
1074 | } | |
1075 | } | |
1076 | ||
6700c270 DM |
1077 | static void ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk, |
1078 | struct sk_buff *skb, u32 mtu) | |
1da177e4 LT |
1079 | { |
1080 | struct rt6_info *rt6 = (struct rt6_info*)dst; | |
1081 | ||
81aded24 | 1082 | dst_confirm(dst); |
1da177e4 | 1083 | if (mtu < dst_mtu(dst) && rt6->rt6i_dst.plen == 128) { |
81aded24 DM |
1084 | struct net *net = dev_net(dst->dev); |
1085 | ||
1da177e4 LT |
1086 | rt6->rt6i_flags |= RTF_MODIFIED; |
1087 | if (mtu < IPV6_MIN_MTU) { | |
defb3519 | 1088 | u32 features = dst_metric(dst, RTAX_FEATURES); |
1da177e4 | 1089 | mtu = IPV6_MIN_MTU; |
defb3519 DM |
1090 | features |= RTAX_FEATURE_ALLFRAG; |
1091 | dst_metric_set(dst, RTAX_FEATURES, features); | |
1da177e4 | 1092 | } |
defb3519 | 1093 | dst_metric_set(dst, RTAX_MTU, mtu); |
81aded24 | 1094 | rt6_update_expires(rt6, net->ipv6.sysctl.ip6_rt_mtu_expires); |
1da177e4 LT |
1095 | } |
1096 | } | |
1097 | ||
42ae66c8 DM |
1098 | void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, |
1099 | int oif, u32 mark) | |
81aded24 DM |
1100 | { |
1101 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; | |
1102 | struct dst_entry *dst; | |
1103 | struct flowi6 fl6; | |
1104 | ||
1105 | memset(&fl6, 0, sizeof(fl6)); | |
1106 | fl6.flowi6_oif = oif; | |
1107 | fl6.flowi6_mark = mark; | |
3e12939a | 1108 | fl6.flowi6_flags = 0; |
81aded24 DM |
1109 | fl6.daddr = iph->daddr; |
1110 | fl6.saddr = iph->saddr; | |
1111 | fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK; | |
1112 | ||
1113 | dst = ip6_route_output(net, NULL, &fl6); | |
1114 | if (!dst->error) | |
6700c270 | 1115 | ip6_rt_update_pmtu(dst, NULL, skb, ntohl(mtu)); |
81aded24 DM |
1116 | dst_release(dst); |
1117 | } | |
1118 | EXPORT_SYMBOL_GPL(ip6_update_pmtu); | |
1119 | ||
1120 | void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu) | |
1121 | { | |
1122 | ip6_update_pmtu(skb, sock_net(sk), mtu, | |
1123 | sk->sk_bound_dev_if, sk->sk_mark); | |
1124 | } | |
1125 | EXPORT_SYMBOL_GPL(ip6_sk_update_pmtu); | |
1126 | ||
3a5ad2ee DM |
1127 | void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark) |
1128 | { | |
1129 | const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data; | |
1130 | struct dst_entry *dst; | |
1131 | struct flowi6 fl6; | |
1132 | ||
1133 | memset(&fl6, 0, sizeof(fl6)); | |
1134 | fl6.flowi6_oif = oif; | |
1135 | fl6.flowi6_mark = mark; | |
1136 | fl6.flowi6_flags = 0; | |
1137 | fl6.daddr = iph->daddr; | |
1138 | fl6.saddr = iph->saddr; | |
1139 | fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK; | |
1140 | ||
1141 | dst = ip6_route_output(net, NULL, &fl6); | |
1142 | if (!dst->error) | |
6700c270 | 1143 | rt6_do_redirect(dst, NULL, skb); |
3a5ad2ee DM |
1144 | dst_release(dst); |
1145 | } | |
1146 | EXPORT_SYMBOL_GPL(ip6_redirect); | |
1147 | ||
1148 | void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk) | |
1149 | { | |
1150 | ip6_redirect(skb, sock_net(sk), sk->sk_bound_dev_if, sk->sk_mark); | |
1151 | } | |
1152 | EXPORT_SYMBOL_GPL(ip6_sk_redirect); | |
1153 | ||
0dbaee3b | 1154 | static unsigned int ip6_default_advmss(const struct dst_entry *dst) |
1da177e4 | 1155 | { |
0dbaee3b DM |
1156 | struct net_device *dev = dst->dev; |
1157 | unsigned int mtu = dst_mtu(dst); | |
1158 | struct net *net = dev_net(dev); | |
1159 | ||
1da177e4 LT |
1160 | mtu -= sizeof(struct ipv6hdr) + sizeof(struct tcphdr); |
1161 | ||
5578689a DL |
1162 | if (mtu < net->ipv6.sysctl.ip6_rt_min_advmss) |
1163 | mtu = net->ipv6.sysctl.ip6_rt_min_advmss; | |
1da177e4 LT |
1164 | |
1165 | /* | |
1ab1457c YH |
1166 | * Maximal non-jumbo IPv6 payload is IPV6_MAXPLEN and |
1167 | * corresponding MSS is IPV6_MAXPLEN - tcp_header_size. | |
1168 | * IPV6_MAXPLEN is also valid and means: "any MSS, | |
1da177e4 LT |
1169 | * rely only on pmtu discovery" |
1170 | */ | |
1171 | if (mtu > IPV6_MAXPLEN - sizeof(struct tcphdr)) | |
1172 | mtu = IPV6_MAXPLEN; | |
1173 | return mtu; | |
1174 | } | |
1175 | ||
ebb762f2 | 1176 | static unsigned int ip6_mtu(const struct dst_entry *dst) |
d33e4553 | 1177 | { |
d33e4553 | 1178 | struct inet6_dev *idev; |
618f9bc7 SK |
1179 | unsigned int mtu = dst_metric_raw(dst, RTAX_MTU); |
1180 | ||
1181 | if (mtu) | |
1182 | return mtu; | |
1183 | ||
1184 | mtu = IPV6_MIN_MTU; | |
d33e4553 DM |
1185 | |
1186 | rcu_read_lock(); | |
1187 | idev = __in6_dev_get(dst->dev); | |
1188 | if (idev) | |
1189 | mtu = idev->cnf.mtu6; | |
1190 | rcu_read_unlock(); | |
1191 | ||
1192 | return mtu; | |
1193 | } | |
1194 | ||
3b00944c YH |
1195 | static struct dst_entry *icmp6_dst_gc_list; |
1196 | static DEFINE_SPINLOCK(icmp6_dst_lock); | |
5d0bbeeb | 1197 | |
3b00944c | 1198 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, |
1da177e4 | 1199 | struct neighbour *neigh, |
87a11578 | 1200 | struct flowi6 *fl6) |
1da177e4 | 1201 | { |
87a11578 | 1202 | struct dst_entry *dst; |
1da177e4 LT |
1203 | struct rt6_info *rt; |
1204 | struct inet6_dev *idev = in6_dev_get(dev); | |
c346dca1 | 1205 | struct net *net = dev_net(dev); |
1da177e4 | 1206 | |
38308473 | 1207 | if (unlikely(!idev)) |
122bdf67 | 1208 | return ERR_PTR(-ENODEV); |
1da177e4 | 1209 | |
8b96d22d | 1210 | rt = ip6_dst_alloc(net, dev, 0, NULL); |
38308473 | 1211 | if (unlikely(!rt)) { |
1da177e4 | 1212 | in6_dev_put(idev); |
87a11578 | 1213 | dst = ERR_PTR(-ENOMEM); |
1da177e4 LT |
1214 | goto out; |
1215 | } | |
1216 | ||
1da177e4 LT |
1217 | if (neigh) |
1218 | neigh_hold(neigh); | |
14deae41 | 1219 | else { |
f894cbf8 | 1220 | neigh = ip6_neigh_lookup(&rt->dst, NULL, &fl6->daddr); |
b43faac6 | 1221 | if (IS_ERR(neigh)) { |
252c3d84 | 1222 | in6_dev_put(idev); |
b43faac6 DM |
1223 | dst_free(&rt->dst); |
1224 | return ERR_CAST(neigh); | |
1225 | } | |
14deae41 | 1226 | } |
1da177e4 | 1227 | |
8e2ec639 YZ |
1228 | rt->dst.flags |= DST_HOST; |
1229 | rt->dst.output = ip6_output; | |
97cac082 | 1230 | rt->n = neigh; |
d8d1f30b | 1231 | atomic_set(&rt->dst.__refcnt, 1); |
87a11578 | 1232 | rt->rt6i_dst.addr = fl6->daddr; |
8e2ec639 YZ |
1233 | rt->rt6i_dst.plen = 128; |
1234 | rt->rt6i_idev = idev; | |
14edd87d | 1235 | dst_metric_set(&rt->dst, RTAX_HOPLIMIT, 0); |
1da177e4 | 1236 | |
3b00944c | 1237 | spin_lock_bh(&icmp6_dst_lock); |
d8d1f30b CG |
1238 | rt->dst.next = icmp6_dst_gc_list; |
1239 | icmp6_dst_gc_list = &rt->dst; | |
3b00944c | 1240 | spin_unlock_bh(&icmp6_dst_lock); |
1da177e4 | 1241 | |
5578689a | 1242 | fib6_force_start_gc(net); |
1da177e4 | 1243 | |
87a11578 DM |
1244 | dst = xfrm_lookup(net, &rt->dst, flowi6_to_flowi(fl6), NULL, 0); |
1245 | ||
1da177e4 | 1246 | out: |
87a11578 | 1247 | return dst; |
1da177e4 LT |
1248 | } |
1249 | ||
3d0f24a7 | 1250 | int icmp6_dst_gc(void) |
1da177e4 | 1251 | { |
e9476e95 | 1252 | struct dst_entry *dst, **pprev; |
3d0f24a7 | 1253 | int more = 0; |
1da177e4 | 1254 | |
3b00944c YH |
1255 | spin_lock_bh(&icmp6_dst_lock); |
1256 | pprev = &icmp6_dst_gc_list; | |
5d0bbeeb | 1257 | |
1da177e4 LT |
1258 | while ((dst = *pprev) != NULL) { |
1259 | if (!atomic_read(&dst->__refcnt)) { | |
1260 | *pprev = dst->next; | |
1261 | dst_free(dst); | |
1da177e4 LT |
1262 | } else { |
1263 | pprev = &dst->next; | |
3d0f24a7 | 1264 | ++more; |
1da177e4 LT |
1265 | } |
1266 | } | |
1267 | ||
3b00944c | 1268 | spin_unlock_bh(&icmp6_dst_lock); |
5d0bbeeb | 1269 | |
3d0f24a7 | 1270 | return more; |
1da177e4 LT |
1271 | } |
1272 | ||
1e493d19 DM |
1273 | static void icmp6_clean_all(int (*func)(struct rt6_info *rt, void *arg), |
1274 | void *arg) | |
1275 | { | |
1276 | struct dst_entry *dst, **pprev; | |
1277 | ||
1278 | spin_lock_bh(&icmp6_dst_lock); | |
1279 | pprev = &icmp6_dst_gc_list; | |
1280 | while ((dst = *pprev) != NULL) { | |
1281 | struct rt6_info *rt = (struct rt6_info *) dst; | |
1282 | if (func(rt, arg)) { | |
1283 | *pprev = dst->next; | |
1284 | dst_free(dst); | |
1285 | } else { | |
1286 | pprev = &dst->next; | |
1287 | } | |
1288 | } | |
1289 | spin_unlock_bh(&icmp6_dst_lock); | |
1290 | } | |
1291 | ||
569d3645 | 1292 | static int ip6_dst_gc(struct dst_ops *ops) |
1da177e4 | 1293 | { |
1da177e4 | 1294 | unsigned long now = jiffies; |
86393e52 | 1295 | struct net *net = container_of(ops, struct net, ipv6.ip6_dst_ops); |
7019b78e DL |
1296 | int rt_min_interval = net->ipv6.sysctl.ip6_rt_gc_min_interval; |
1297 | int rt_max_size = net->ipv6.sysctl.ip6_rt_max_size; | |
1298 | int rt_elasticity = net->ipv6.sysctl.ip6_rt_gc_elasticity; | |
1299 | int rt_gc_timeout = net->ipv6.sysctl.ip6_rt_gc_timeout; | |
1300 | unsigned long rt_last_gc = net->ipv6.ip6_rt_last_gc; | |
fc66f95c | 1301 | int entries; |
7019b78e | 1302 | |
fc66f95c | 1303 | entries = dst_entries_get_fast(ops); |
7019b78e | 1304 | if (time_after(rt_last_gc + rt_min_interval, now) && |
fc66f95c | 1305 | entries <= rt_max_size) |
1da177e4 LT |
1306 | goto out; |
1307 | ||
6891a346 BT |
1308 | net->ipv6.ip6_rt_gc_expire++; |
1309 | fib6_run_gc(net->ipv6.ip6_rt_gc_expire, net); | |
1310 | net->ipv6.ip6_rt_last_gc = now; | |
fc66f95c ED |
1311 | entries = dst_entries_get_slow(ops); |
1312 | if (entries < ops->gc_thresh) | |
7019b78e | 1313 | net->ipv6.ip6_rt_gc_expire = rt_gc_timeout>>1; |
1da177e4 | 1314 | out: |
7019b78e | 1315 | net->ipv6.ip6_rt_gc_expire -= net->ipv6.ip6_rt_gc_expire>>rt_elasticity; |
fc66f95c | 1316 | return entries > rt_max_size; |
1da177e4 LT |
1317 | } |
1318 | ||
1319 | /* Clean host part of a prefix. Not necessary in radix tree, | |
1320 | but results in cleaner routing tables. | |
1321 | ||
1322 | Remove it only when all the things will work! | |
1323 | */ | |
1324 | ||
6b75d090 | 1325 | int ip6_dst_hoplimit(struct dst_entry *dst) |
1da177e4 | 1326 | { |
5170ae82 | 1327 | int hoplimit = dst_metric_raw(dst, RTAX_HOPLIMIT); |
a02e4b7d | 1328 | if (hoplimit == 0) { |
6b75d090 | 1329 | struct net_device *dev = dst->dev; |
c68f24cc ED |
1330 | struct inet6_dev *idev; |
1331 | ||
1332 | rcu_read_lock(); | |
1333 | idev = __in6_dev_get(dev); | |
1334 | if (idev) | |
6b75d090 | 1335 | hoplimit = idev->cnf.hop_limit; |
c68f24cc | 1336 | else |
53b7997f | 1337 | hoplimit = dev_net(dev)->ipv6.devconf_all->hop_limit; |
c68f24cc | 1338 | rcu_read_unlock(); |
1da177e4 LT |
1339 | } |
1340 | return hoplimit; | |
1341 | } | |
abbf46ae | 1342 | EXPORT_SYMBOL(ip6_dst_hoplimit); |
1da177e4 LT |
1343 | |
1344 | /* | |
1345 | * | |
1346 | */ | |
1347 | ||
86872cb5 | 1348 | int ip6_route_add(struct fib6_config *cfg) |
1da177e4 LT |
1349 | { |
1350 | int err; | |
5578689a | 1351 | struct net *net = cfg->fc_nlinfo.nl_net; |
1da177e4 LT |
1352 | struct rt6_info *rt = NULL; |
1353 | struct net_device *dev = NULL; | |
1354 | struct inet6_dev *idev = NULL; | |
c71099ac | 1355 | struct fib6_table *table; |
1da177e4 LT |
1356 | int addr_type; |
1357 | ||
86872cb5 | 1358 | if (cfg->fc_dst_len > 128 || cfg->fc_src_len > 128) |
1da177e4 LT |
1359 | return -EINVAL; |
1360 | #ifndef CONFIG_IPV6_SUBTREES | |
86872cb5 | 1361 | if (cfg->fc_src_len) |
1da177e4 LT |
1362 | return -EINVAL; |
1363 | #endif | |
86872cb5 | 1364 | if (cfg->fc_ifindex) { |
1da177e4 | 1365 | err = -ENODEV; |
5578689a | 1366 | dev = dev_get_by_index(net, cfg->fc_ifindex); |
1da177e4 LT |
1367 | if (!dev) |
1368 | goto out; | |
1369 | idev = in6_dev_get(dev); | |
1370 | if (!idev) | |
1371 | goto out; | |
1372 | } | |
1373 | ||
86872cb5 TG |
1374 | if (cfg->fc_metric == 0) |
1375 | cfg->fc_metric = IP6_RT_PRIO_USER; | |
1da177e4 | 1376 | |
d71314b4 | 1377 | err = -ENOBUFS; |
38308473 DM |
1378 | if (cfg->fc_nlinfo.nlh && |
1379 | !(cfg->fc_nlinfo.nlh->nlmsg_flags & NLM_F_CREATE)) { | |
d71314b4 | 1380 | table = fib6_get_table(net, cfg->fc_table); |
38308473 | 1381 | if (!table) { |
f3213831 | 1382 | pr_warn("NLM_F_CREATE should be specified when creating new route\n"); |
d71314b4 MV |
1383 | table = fib6_new_table(net, cfg->fc_table); |
1384 | } | |
1385 | } else { | |
1386 | table = fib6_new_table(net, cfg->fc_table); | |
1387 | } | |
38308473 DM |
1388 | |
1389 | if (!table) | |
c71099ac | 1390 | goto out; |
c71099ac | 1391 | |
8b96d22d | 1392 | rt = ip6_dst_alloc(net, NULL, DST_NOCOUNT, table); |
1da177e4 | 1393 | |
38308473 | 1394 | if (!rt) { |
1da177e4 LT |
1395 | err = -ENOMEM; |
1396 | goto out; | |
1397 | } | |
1398 | ||
1716a961 G |
1399 | if (cfg->fc_flags & RTF_EXPIRES) |
1400 | rt6_set_expires(rt, jiffies + | |
1401 | clock_t_to_jiffies(cfg->fc_expires)); | |
1402 | else | |
1403 | rt6_clean_expires(rt); | |
1da177e4 | 1404 | |
86872cb5 TG |
1405 | if (cfg->fc_protocol == RTPROT_UNSPEC) |
1406 | cfg->fc_protocol = RTPROT_BOOT; | |
1407 | rt->rt6i_protocol = cfg->fc_protocol; | |
1408 | ||
1409 | addr_type = ipv6_addr_type(&cfg->fc_dst); | |
1da177e4 LT |
1410 | |
1411 | if (addr_type & IPV6_ADDR_MULTICAST) | |
d8d1f30b | 1412 | rt->dst.input = ip6_mc_input; |
ab79ad14 MŻ |
1413 | else if (cfg->fc_flags & RTF_LOCAL) |
1414 | rt->dst.input = ip6_input; | |
1da177e4 | 1415 | else |
d8d1f30b | 1416 | rt->dst.input = ip6_forward; |
1da177e4 | 1417 | |
d8d1f30b | 1418 | rt->dst.output = ip6_output; |
1da177e4 | 1419 | |
86872cb5 TG |
1420 | ipv6_addr_prefix(&rt->rt6i_dst.addr, &cfg->fc_dst, cfg->fc_dst_len); |
1421 | rt->rt6i_dst.plen = cfg->fc_dst_len; | |
1da177e4 | 1422 | if (rt->rt6i_dst.plen == 128) |
11d53b49 | 1423 | rt->dst.flags |= DST_HOST; |
1da177e4 | 1424 | |
8e2ec639 YZ |
1425 | if (!(rt->dst.flags & DST_HOST) && cfg->fc_mx) { |
1426 | u32 *metrics = kzalloc(sizeof(u32) * RTAX_MAX, GFP_KERNEL); | |
1427 | if (!metrics) { | |
1428 | err = -ENOMEM; | |
1429 | goto out; | |
1430 | } | |
1431 | dst_init_metrics(&rt->dst, metrics, 0); | |
1432 | } | |
1da177e4 | 1433 | #ifdef CONFIG_IPV6_SUBTREES |
86872cb5 TG |
1434 | ipv6_addr_prefix(&rt->rt6i_src.addr, &cfg->fc_src, cfg->fc_src_len); |
1435 | rt->rt6i_src.plen = cfg->fc_src_len; | |
1da177e4 LT |
1436 | #endif |
1437 | ||
86872cb5 | 1438 | rt->rt6i_metric = cfg->fc_metric; |
1da177e4 LT |
1439 | |
1440 | /* We cannot add true routes via loopback here, | |
1441 | they would result in kernel looping; promote them to reject routes | |
1442 | */ | |
86872cb5 | 1443 | if ((cfg->fc_flags & RTF_REJECT) || |
38308473 DM |
1444 | (dev && (dev->flags & IFF_LOOPBACK) && |
1445 | !(addr_type & IPV6_ADDR_LOOPBACK) && | |
1446 | !(cfg->fc_flags & RTF_LOCAL))) { | |
1da177e4 | 1447 | /* hold loopback dev/idev if we haven't done so. */ |
5578689a | 1448 | if (dev != net->loopback_dev) { |
1da177e4 LT |
1449 | if (dev) { |
1450 | dev_put(dev); | |
1451 | in6_dev_put(idev); | |
1452 | } | |
5578689a | 1453 | dev = net->loopback_dev; |
1da177e4 LT |
1454 | dev_hold(dev); |
1455 | idev = in6_dev_get(dev); | |
1456 | if (!idev) { | |
1457 | err = -ENODEV; | |
1458 | goto out; | |
1459 | } | |
1460 | } | |
d8d1f30b CG |
1461 | rt->dst.output = ip6_pkt_discard_out; |
1462 | rt->dst.input = ip6_pkt_discard; | |
1da177e4 | 1463 | rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP; |
ef2c7d7b ND |
1464 | switch (cfg->fc_type) { |
1465 | case RTN_BLACKHOLE: | |
1466 | rt->dst.error = -EINVAL; | |
1467 | break; | |
1468 | case RTN_PROHIBIT: | |
1469 | rt->dst.error = -EACCES; | |
1470 | break; | |
b4949ab2 ND |
1471 | case RTN_THROW: |
1472 | rt->dst.error = -EAGAIN; | |
1473 | break; | |
ef2c7d7b ND |
1474 | default: |
1475 | rt->dst.error = -ENETUNREACH; | |
1476 | break; | |
1477 | } | |
1da177e4 LT |
1478 | goto install_route; |
1479 | } | |
1480 | ||
86872cb5 | 1481 | if (cfg->fc_flags & RTF_GATEWAY) { |
b71d1d42 | 1482 | const struct in6_addr *gw_addr; |
1da177e4 LT |
1483 | int gwa_type; |
1484 | ||
86872cb5 | 1485 | gw_addr = &cfg->fc_gateway; |
4e3fd7a0 | 1486 | rt->rt6i_gateway = *gw_addr; |
1da177e4 LT |
1487 | gwa_type = ipv6_addr_type(gw_addr); |
1488 | ||
1489 | if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) { | |
1490 | struct rt6_info *grt; | |
1491 | ||
1492 | /* IPv6 strictly inhibits using not link-local | |
1493 | addresses as nexthop address. | |
1494 | Otherwise, router will not able to send redirects. | |
1495 | It is very good, but in some (rare!) circumstances | |
1496 | (SIT, PtP, NBMA NOARP links) it is handy to allow | |
1497 | some exceptions. --ANK | |
1498 | */ | |
1499 | err = -EINVAL; | |
38308473 | 1500 | if (!(gwa_type & IPV6_ADDR_UNICAST)) |
1da177e4 LT |
1501 | goto out; |
1502 | ||
5578689a | 1503 | grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1); |
1da177e4 LT |
1504 | |
1505 | err = -EHOSTUNREACH; | |
38308473 | 1506 | if (!grt) |
1da177e4 LT |
1507 | goto out; |
1508 | if (dev) { | |
d1918542 | 1509 | if (dev != grt->dst.dev) { |
d8d1f30b | 1510 | dst_release(&grt->dst); |
1da177e4 LT |
1511 | goto out; |
1512 | } | |
1513 | } else { | |
d1918542 | 1514 | dev = grt->dst.dev; |
1da177e4 LT |
1515 | idev = grt->rt6i_idev; |
1516 | dev_hold(dev); | |
1517 | in6_dev_hold(grt->rt6i_idev); | |
1518 | } | |
38308473 | 1519 | if (!(grt->rt6i_flags & RTF_GATEWAY)) |
1da177e4 | 1520 | err = 0; |
d8d1f30b | 1521 | dst_release(&grt->dst); |
1da177e4 LT |
1522 | |
1523 | if (err) | |
1524 | goto out; | |
1525 | } | |
1526 | err = -EINVAL; | |
38308473 | 1527 | if (!dev || (dev->flags & IFF_LOOPBACK)) |
1da177e4 LT |
1528 | goto out; |
1529 | } | |
1530 | ||
1531 | err = -ENODEV; | |
38308473 | 1532 | if (!dev) |
1da177e4 LT |
1533 | goto out; |
1534 | ||
c3968a85 DW |
1535 | if (!ipv6_addr_any(&cfg->fc_prefsrc)) { |
1536 | if (!ipv6_chk_addr(net, &cfg->fc_prefsrc, dev, 0)) { | |
1537 | err = -EINVAL; | |
1538 | goto out; | |
1539 | } | |
4e3fd7a0 | 1540 | rt->rt6i_prefsrc.addr = cfg->fc_prefsrc; |
c3968a85 DW |
1541 | rt->rt6i_prefsrc.plen = 128; |
1542 | } else | |
1543 | rt->rt6i_prefsrc.plen = 0; | |
1544 | ||
86872cb5 | 1545 | if (cfg->fc_flags & (RTF_GATEWAY | RTF_NONEXTHOP)) { |
8ade06c6 | 1546 | err = rt6_bind_neighbour(rt, dev); |
f83c7790 | 1547 | if (err) |
1da177e4 | 1548 | goto out; |
1da177e4 LT |
1549 | } |
1550 | ||
86872cb5 | 1551 | rt->rt6i_flags = cfg->fc_flags; |
1da177e4 LT |
1552 | |
1553 | install_route: | |
86872cb5 TG |
1554 | if (cfg->fc_mx) { |
1555 | struct nlattr *nla; | |
1556 | int remaining; | |
1557 | ||
1558 | nla_for_each_attr(nla, cfg->fc_mx, cfg->fc_mx_len, remaining) { | |
8f4c1f9b | 1559 | int type = nla_type(nla); |
86872cb5 TG |
1560 | |
1561 | if (type) { | |
1562 | if (type > RTAX_MAX) { | |
1da177e4 LT |
1563 | err = -EINVAL; |
1564 | goto out; | |
1565 | } | |
86872cb5 | 1566 | |
defb3519 | 1567 | dst_metric_set(&rt->dst, type, nla_get_u32(nla)); |
1da177e4 | 1568 | } |
1da177e4 LT |
1569 | } |
1570 | } | |
1571 | ||
d8d1f30b | 1572 | rt->dst.dev = dev; |
1da177e4 | 1573 | rt->rt6i_idev = idev; |
c71099ac | 1574 | rt->rt6i_table = table; |
63152fc0 | 1575 | |
c346dca1 | 1576 | cfg->fc_nlinfo.nl_net = dev_net(dev); |
63152fc0 | 1577 | |
86872cb5 | 1578 | return __ip6_ins_rt(rt, &cfg->fc_nlinfo); |
1da177e4 LT |
1579 | |
1580 | out: | |
1581 | if (dev) | |
1582 | dev_put(dev); | |
1583 | if (idev) | |
1584 | in6_dev_put(idev); | |
1585 | if (rt) | |
d8d1f30b | 1586 | dst_free(&rt->dst); |
1da177e4 LT |
1587 | return err; |
1588 | } | |
1589 | ||
86872cb5 | 1590 | static int __ip6_del_rt(struct rt6_info *rt, struct nl_info *info) |
1da177e4 LT |
1591 | { |
1592 | int err; | |
c71099ac | 1593 | struct fib6_table *table; |
d1918542 | 1594 | struct net *net = dev_net(rt->dst.dev); |
1da177e4 | 1595 | |
6825a26c G |
1596 | if (rt == net->ipv6.ip6_null_entry) { |
1597 | err = -ENOENT; | |
1598 | goto out; | |
1599 | } | |
6c813a72 | 1600 | |
c71099ac TG |
1601 | table = rt->rt6i_table; |
1602 | write_lock_bh(&table->tb6_lock); | |
86872cb5 | 1603 | err = fib6_del(rt, info); |
c71099ac | 1604 | write_unlock_bh(&table->tb6_lock); |
1da177e4 | 1605 | |
6825a26c G |
1606 | out: |
1607 | dst_release(&rt->dst); | |
1da177e4 LT |
1608 | return err; |
1609 | } | |
1610 | ||
e0a1ad73 TG |
1611 | int ip6_del_rt(struct rt6_info *rt) |
1612 | { | |
4d1169c1 | 1613 | struct nl_info info = { |
d1918542 | 1614 | .nl_net = dev_net(rt->dst.dev), |
4d1169c1 | 1615 | }; |
528c4ceb | 1616 | return __ip6_del_rt(rt, &info); |
e0a1ad73 TG |
1617 | } |
1618 | ||
86872cb5 | 1619 | static int ip6_route_del(struct fib6_config *cfg) |
1da177e4 | 1620 | { |
c71099ac | 1621 | struct fib6_table *table; |
1da177e4 LT |
1622 | struct fib6_node *fn; |
1623 | struct rt6_info *rt; | |
1624 | int err = -ESRCH; | |
1625 | ||
5578689a | 1626 | table = fib6_get_table(cfg->fc_nlinfo.nl_net, cfg->fc_table); |
38308473 | 1627 | if (!table) |
c71099ac TG |
1628 | return err; |
1629 | ||
1630 | read_lock_bh(&table->tb6_lock); | |
1da177e4 | 1631 | |
c71099ac | 1632 | fn = fib6_locate(&table->tb6_root, |
86872cb5 TG |
1633 | &cfg->fc_dst, cfg->fc_dst_len, |
1634 | &cfg->fc_src, cfg->fc_src_len); | |
1ab1457c | 1635 | |
1da177e4 | 1636 | if (fn) { |
d8d1f30b | 1637 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
86872cb5 | 1638 | if (cfg->fc_ifindex && |
d1918542 DM |
1639 | (!rt->dst.dev || |
1640 | rt->dst.dev->ifindex != cfg->fc_ifindex)) | |
1da177e4 | 1641 | continue; |
86872cb5 TG |
1642 | if (cfg->fc_flags & RTF_GATEWAY && |
1643 | !ipv6_addr_equal(&cfg->fc_gateway, &rt->rt6i_gateway)) | |
1da177e4 | 1644 | continue; |
86872cb5 | 1645 | if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric) |
1da177e4 | 1646 | continue; |
d8d1f30b | 1647 | dst_hold(&rt->dst); |
c71099ac | 1648 | read_unlock_bh(&table->tb6_lock); |
1da177e4 | 1649 | |
86872cb5 | 1650 | return __ip6_del_rt(rt, &cfg->fc_nlinfo); |
1da177e4 LT |
1651 | } |
1652 | } | |
c71099ac | 1653 | read_unlock_bh(&table->tb6_lock); |
1da177e4 LT |
1654 | |
1655 | return err; | |
1656 | } | |
1657 | ||
6700c270 | 1658 | static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_buff *skb) |
a6279458 | 1659 | { |
e8599ff4 | 1660 | struct net *net = dev_net(skb->dev); |
a6279458 | 1661 | struct netevent_redirect netevent; |
e8599ff4 DM |
1662 | struct rt6_info *rt, *nrt = NULL; |
1663 | const struct in6_addr *target; | |
e8599ff4 | 1664 | struct ndisc_options ndopts; |
6e157b6a DM |
1665 | const struct in6_addr *dest; |
1666 | struct neighbour *old_neigh; | |
e8599ff4 DM |
1667 | struct inet6_dev *in6_dev; |
1668 | struct neighbour *neigh; | |
1669 | struct icmp6hdr *icmph; | |
6e157b6a DM |
1670 | int optlen, on_link; |
1671 | u8 *lladdr; | |
e8599ff4 DM |
1672 | |
1673 | optlen = skb->tail - skb->transport_header; | |
1674 | optlen -= sizeof(struct icmp6hdr) + 2 * sizeof(struct in6_addr); | |
1675 | ||
1676 | if (optlen < 0) { | |
6e157b6a | 1677 | net_dbg_ratelimited("rt6_do_redirect: packet too short\n"); |
e8599ff4 DM |
1678 | return; |
1679 | } | |
1680 | ||
1681 | icmph = icmp6_hdr(skb); | |
1682 | target = (const struct in6_addr *) (icmph + 1); | |
1683 | dest = target + 1; | |
1684 | ||
1685 | if (ipv6_addr_is_multicast(dest)) { | |
6e157b6a | 1686 | net_dbg_ratelimited("rt6_do_redirect: destination address is multicast\n"); |
e8599ff4 DM |
1687 | return; |
1688 | } | |
1689 | ||
6e157b6a | 1690 | on_link = 0; |
e8599ff4 DM |
1691 | if (ipv6_addr_equal(dest, target)) { |
1692 | on_link = 1; | |
1693 | } else if (ipv6_addr_type(target) != | |
1694 | (IPV6_ADDR_UNICAST|IPV6_ADDR_LINKLOCAL)) { | |
6e157b6a | 1695 | net_dbg_ratelimited("rt6_do_redirect: target address is not link-local unicast\n"); |
e8599ff4 DM |
1696 | return; |
1697 | } | |
1698 | ||
1699 | in6_dev = __in6_dev_get(skb->dev); | |
1700 | if (!in6_dev) | |
1701 | return; | |
1702 | if (in6_dev->cnf.forwarding || !in6_dev->cnf.accept_redirects) | |
1703 | return; | |
1704 | ||
1705 | /* RFC2461 8.1: | |
1706 | * The IP source address of the Redirect MUST be the same as the current | |
1707 | * first-hop router for the specified ICMP Destination Address. | |
1708 | */ | |
1709 | ||
1710 | if (!ndisc_parse_options((u8*)(dest + 1), optlen, &ndopts)) { | |
1711 | net_dbg_ratelimited("rt6_redirect: invalid ND options\n"); | |
1712 | return; | |
1713 | } | |
6e157b6a DM |
1714 | |
1715 | lladdr = NULL; | |
e8599ff4 DM |
1716 | if (ndopts.nd_opts_tgt_lladdr) { |
1717 | lladdr = ndisc_opt_addr_data(ndopts.nd_opts_tgt_lladdr, | |
1718 | skb->dev); | |
1719 | if (!lladdr) { | |
1720 | net_dbg_ratelimited("rt6_redirect: invalid link-layer address length\n"); | |
1721 | return; | |
1722 | } | |
1723 | } | |
1724 | ||
6e157b6a DM |
1725 | rt = (struct rt6_info *) dst; |
1726 | if (rt == net->ipv6.ip6_null_entry) { | |
1727 | net_dbg_ratelimited("rt6_redirect: source isn't a valid nexthop for redirect target\n"); | |
e8599ff4 | 1728 | return; |
6e157b6a | 1729 | } |
e8599ff4 | 1730 | |
6e157b6a DM |
1731 | /* Redirect received -> path was valid. |
1732 | * Look, redirects are sent only in response to data packets, | |
1733 | * so that this nexthop apparently is reachable. --ANK | |
1734 | */ | |
1735 | dst_confirm(&rt->dst); | |
a6279458 | 1736 | |
6e157b6a DM |
1737 | neigh = __neigh_lookup(&nd_tbl, target, skb->dev, 1); |
1738 | if (!neigh) | |
1739 | return; | |
a6279458 | 1740 | |
6e157b6a DM |
1741 | /* Duplicate redirect: silently ignore. */ |
1742 | old_neigh = rt->n; | |
1743 | if (neigh == old_neigh) | |
a6279458 | 1744 | goto out; |
1da177e4 | 1745 | |
1da177e4 LT |
1746 | /* |
1747 | * We have finally decided to accept it. | |
1748 | */ | |
1749 | ||
1ab1457c | 1750 | neigh_update(neigh, lladdr, NUD_STALE, |
1da177e4 LT |
1751 | NEIGH_UPDATE_F_WEAK_OVERRIDE| |
1752 | NEIGH_UPDATE_F_OVERRIDE| | |
1753 | (on_link ? 0 : (NEIGH_UPDATE_F_OVERRIDE_ISROUTER| | |
1754 | NEIGH_UPDATE_F_ISROUTER)) | |
1755 | ); | |
1756 | ||
21efcfa0 | 1757 | nrt = ip6_rt_copy(rt, dest); |
38308473 | 1758 | if (!nrt) |
1da177e4 LT |
1759 | goto out; |
1760 | ||
1761 | nrt->rt6i_flags = RTF_GATEWAY|RTF_UP|RTF_DYNAMIC|RTF_CACHE; | |
1762 | if (on_link) | |
1763 | nrt->rt6i_flags &= ~RTF_GATEWAY; | |
1764 | ||
4e3fd7a0 | 1765 | nrt->rt6i_gateway = *(struct in6_addr *)neigh->primary_key; |
97cac082 | 1766 | nrt->n = neigh_clone(neigh); |
1da177e4 | 1767 | |
40e22e8f | 1768 | if (ip6_ins_rt(nrt)) |
1da177e4 LT |
1769 | goto out; |
1770 | ||
d8d1f30b | 1771 | netevent.old = &rt->dst; |
1d248b1c | 1772 | netevent.old_neigh = old_neigh; |
d8d1f30b | 1773 | netevent.new = &nrt->dst; |
1d248b1c DM |
1774 | netevent.new_neigh = neigh; |
1775 | netevent.daddr = dest; | |
8d71740c TT |
1776 | call_netevent_notifiers(NETEVENT_REDIRECT, &netevent); |
1777 | ||
38308473 | 1778 | if (rt->rt6i_flags & RTF_CACHE) { |
6e157b6a | 1779 | rt = (struct rt6_info *) dst_clone(&rt->dst); |
e0a1ad73 | 1780 | ip6_del_rt(rt); |
1da177e4 LT |
1781 | } |
1782 | ||
1783 | out: | |
e8599ff4 | 1784 | neigh_release(neigh); |
6e157b6a DM |
1785 | } |
1786 | ||
1da177e4 LT |
1787 | /* |
1788 | * Misc support functions | |
1789 | */ | |
1790 | ||
1716a961 | 1791 | static struct rt6_info *ip6_rt_copy(struct rt6_info *ort, |
21efcfa0 | 1792 | const struct in6_addr *dest) |
1da177e4 | 1793 | { |
d1918542 | 1794 | struct net *net = dev_net(ort->dst.dev); |
8b96d22d DM |
1795 | struct rt6_info *rt = ip6_dst_alloc(net, ort->dst.dev, 0, |
1796 | ort->rt6i_table); | |
1da177e4 LT |
1797 | |
1798 | if (rt) { | |
d8d1f30b CG |
1799 | rt->dst.input = ort->dst.input; |
1800 | rt->dst.output = ort->dst.output; | |
8e2ec639 | 1801 | rt->dst.flags |= DST_HOST; |
d8d1f30b | 1802 | |
4e3fd7a0 | 1803 | rt->rt6i_dst.addr = *dest; |
8e2ec639 | 1804 | rt->rt6i_dst.plen = 128; |
defb3519 | 1805 | dst_copy_metrics(&rt->dst, &ort->dst); |
d8d1f30b | 1806 | rt->dst.error = ort->dst.error; |
1da177e4 LT |
1807 | rt->rt6i_idev = ort->rt6i_idev; |
1808 | if (rt->rt6i_idev) | |
1809 | in6_dev_hold(rt->rt6i_idev); | |
d8d1f30b | 1810 | rt->dst.lastuse = jiffies; |
1da177e4 | 1811 | |
4e3fd7a0 | 1812 | rt->rt6i_gateway = ort->rt6i_gateway; |
1716a961 G |
1813 | rt->rt6i_flags = ort->rt6i_flags; |
1814 | if ((ort->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) == | |
1815 | (RTF_DEFAULT | RTF_ADDRCONF)) | |
1816 | rt6_set_from(rt, ort); | |
1817 | else | |
1818 | rt6_clean_expires(rt); | |
1da177e4 LT |
1819 | rt->rt6i_metric = 0; |
1820 | ||
1da177e4 LT |
1821 | #ifdef CONFIG_IPV6_SUBTREES |
1822 | memcpy(&rt->rt6i_src, &ort->rt6i_src, sizeof(struct rt6key)); | |
1823 | #endif | |
0f6c6392 | 1824 | memcpy(&rt->rt6i_prefsrc, &ort->rt6i_prefsrc, sizeof(struct rt6key)); |
c71099ac | 1825 | rt->rt6i_table = ort->rt6i_table; |
1da177e4 LT |
1826 | } |
1827 | return rt; | |
1828 | } | |
1829 | ||
70ceb4f5 | 1830 | #ifdef CONFIG_IPV6_ROUTE_INFO |
efa2cea0 | 1831 | static struct rt6_info *rt6_get_route_info(struct net *net, |
b71d1d42 ED |
1832 | const struct in6_addr *prefix, int prefixlen, |
1833 | const struct in6_addr *gwaddr, int ifindex) | |
70ceb4f5 YH |
1834 | { |
1835 | struct fib6_node *fn; | |
1836 | struct rt6_info *rt = NULL; | |
c71099ac TG |
1837 | struct fib6_table *table; |
1838 | ||
efa2cea0 | 1839 | table = fib6_get_table(net, RT6_TABLE_INFO); |
38308473 | 1840 | if (!table) |
c71099ac | 1841 | return NULL; |
70ceb4f5 | 1842 | |
5744dd9b | 1843 | read_lock_bh(&table->tb6_lock); |
c71099ac | 1844 | fn = fib6_locate(&table->tb6_root, prefix ,prefixlen, NULL, 0); |
70ceb4f5 YH |
1845 | if (!fn) |
1846 | goto out; | |
1847 | ||
d8d1f30b | 1848 | for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) { |
d1918542 | 1849 | if (rt->dst.dev->ifindex != ifindex) |
70ceb4f5 YH |
1850 | continue; |
1851 | if ((rt->rt6i_flags & (RTF_ROUTEINFO|RTF_GATEWAY)) != (RTF_ROUTEINFO|RTF_GATEWAY)) | |
1852 | continue; | |
1853 | if (!ipv6_addr_equal(&rt->rt6i_gateway, gwaddr)) | |
1854 | continue; | |
d8d1f30b | 1855 | dst_hold(&rt->dst); |
70ceb4f5 YH |
1856 | break; |
1857 | } | |
1858 | out: | |
5744dd9b | 1859 | read_unlock_bh(&table->tb6_lock); |
70ceb4f5 YH |
1860 | return rt; |
1861 | } | |
1862 | ||
efa2cea0 | 1863 | static struct rt6_info *rt6_add_route_info(struct net *net, |
b71d1d42 ED |
1864 | const struct in6_addr *prefix, int prefixlen, |
1865 | const struct in6_addr *gwaddr, int ifindex, | |
95c96174 | 1866 | unsigned int pref) |
70ceb4f5 | 1867 | { |
86872cb5 TG |
1868 | struct fib6_config cfg = { |
1869 | .fc_table = RT6_TABLE_INFO, | |
238fc7ea | 1870 | .fc_metric = IP6_RT_PRIO_USER, |
86872cb5 TG |
1871 | .fc_ifindex = ifindex, |
1872 | .fc_dst_len = prefixlen, | |
1873 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_ROUTEINFO | | |
1874 | RTF_UP | RTF_PREF(pref), | |
15e47304 | 1875 | .fc_nlinfo.portid = 0, |
efa2cea0 DL |
1876 | .fc_nlinfo.nlh = NULL, |
1877 | .fc_nlinfo.nl_net = net, | |
86872cb5 TG |
1878 | }; |
1879 | ||
4e3fd7a0 AD |
1880 | cfg.fc_dst = *prefix; |
1881 | cfg.fc_gateway = *gwaddr; | |
70ceb4f5 | 1882 | |
e317da96 YH |
1883 | /* We should treat it as a default route if prefix length is 0. */ |
1884 | if (!prefixlen) | |
86872cb5 | 1885 | cfg.fc_flags |= RTF_DEFAULT; |
70ceb4f5 | 1886 | |
86872cb5 | 1887 | ip6_route_add(&cfg); |
70ceb4f5 | 1888 | |
efa2cea0 | 1889 | return rt6_get_route_info(net, prefix, prefixlen, gwaddr, ifindex); |
70ceb4f5 YH |
1890 | } |
1891 | #endif | |
1892 | ||
b71d1d42 | 1893 | struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_device *dev) |
1ab1457c | 1894 | { |
1da177e4 | 1895 | struct rt6_info *rt; |
c71099ac | 1896 | struct fib6_table *table; |
1da177e4 | 1897 | |
c346dca1 | 1898 | table = fib6_get_table(dev_net(dev), RT6_TABLE_DFLT); |
38308473 | 1899 | if (!table) |
c71099ac | 1900 | return NULL; |
1da177e4 | 1901 | |
5744dd9b | 1902 | read_lock_bh(&table->tb6_lock); |
d8d1f30b | 1903 | for (rt = table->tb6_root.leaf; rt; rt=rt->dst.rt6_next) { |
d1918542 | 1904 | if (dev == rt->dst.dev && |
045927ff | 1905 | ((rt->rt6i_flags & (RTF_ADDRCONF | RTF_DEFAULT)) == (RTF_ADDRCONF | RTF_DEFAULT)) && |
1da177e4 LT |
1906 | ipv6_addr_equal(&rt->rt6i_gateway, addr)) |
1907 | break; | |
1908 | } | |
1909 | if (rt) | |
d8d1f30b | 1910 | dst_hold(&rt->dst); |
5744dd9b | 1911 | read_unlock_bh(&table->tb6_lock); |
1da177e4 LT |
1912 | return rt; |
1913 | } | |
1914 | ||
b71d1d42 | 1915 | struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, |
ebacaaa0 YH |
1916 | struct net_device *dev, |
1917 | unsigned int pref) | |
1da177e4 | 1918 | { |
86872cb5 TG |
1919 | struct fib6_config cfg = { |
1920 | .fc_table = RT6_TABLE_DFLT, | |
238fc7ea | 1921 | .fc_metric = IP6_RT_PRIO_USER, |
86872cb5 TG |
1922 | .fc_ifindex = dev->ifindex, |
1923 | .fc_flags = RTF_GATEWAY | RTF_ADDRCONF | RTF_DEFAULT | | |
1924 | RTF_UP | RTF_EXPIRES | RTF_PREF(pref), | |
15e47304 | 1925 | .fc_nlinfo.portid = 0, |
5578689a | 1926 | .fc_nlinfo.nlh = NULL, |
c346dca1 | 1927 | .fc_nlinfo.nl_net = dev_net(dev), |
86872cb5 | 1928 | }; |
1da177e4 | 1929 | |
4e3fd7a0 | 1930 | cfg.fc_gateway = *gwaddr; |
1da177e4 | 1931 | |
86872cb5 | 1932 | ip6_route_add(&cfg); |
1da177e4 | 1933 | |
1da177e4 LT |
1934 | return rt6_get_dflt_router(gwaddr, dev); |
1935 | } | |
1936 | ||
7b4da532 | 1937 | void rt6_purge_dflt_routers(struct net *net) |
1da177e4 LT |
1938 | { |
1939 | struct rt6_info *rt; | |
c71099ac TG |
1940 | struct fib6_table *table; |
1941 | ||
1942 | /* NOTE: Keep consistent with rt6_get_dflt_router */ | |
7b4da532 | 1943 | table = fib6_get_table(net, RT6_TABLE_DFLT); |
38308473 | 1944 | if (!table) |
c71099ac | 1945 | return; |
1da177e4 LT |
1946 | |
1947 | restart: | |
c71099ac | 1948 | read_lock_bh(&table->tb6_lock); |
d8d1f30b | 1949 | for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) { |
1da177e4 | 1950 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) { |
d8d1f30b | 1951 | dst_hold(&rt->dst); |
c71099ac | 1952 | read_unlock_bh(&table->tb6_lock); |
e0a1ad73 | 1953 | ip6_del_rt(rt); |
1da177e4 LT |
1954 | goto restart; |
1955 | } | |
1956 | } | |
c71099ac | 1957 | read_unlock_bh(&table->tb6_lock); |
1da177e4 LT |
1958 | } |
1959 | ||
5578689a DL |
1960 | static void rtmsg_to_fib6_config(struct net *net, |
1961 | struct in6_rtmsg *rtmsg, | |
86872cb5 TG |
1962 | struct fib6_config *cfg) |
1963 | { | |
1964 | memset(cfg, 0, sizeof(*cfg)); | |
1965 | ||
1966 | cfg->fc_table = RT6_TABLE_MAIN; | |
1967 | cfg->fc_ifindex = rtmsg->rtmsg_ifindex; | |
1968 | cfg->fc_metric = rtmsg->rtmsg_metric; | |
1969 | cfg->fc_expires = rtmsg->rtmsg_info; | |
1970 | cfg->fc_dst_len = rtmsg->rtmsg_dst_len; | |
1971 | cfg->fc_src_len = rtmsg->rtmsg_src_len; | |
1972 | cfg->fc_flags = rtmsg->rtmsg_flags; | |
1973 | ||
5578689a | 1974 | cfg->fc_nlinfo.nl_net = net; |
f1243c2d | 1975 | |
4e3fd7a0 AD |
1976 | cfg->fc_dst = rtmsg->rtmsg_dst; |
1977 | cfg->fc_src = rtmsg->rtmsg_src; | |
1978 | cfg->fc_gateway = rtmsg->rtmsg_gateway; | |
86872cb5 TG |
1979 | } |
1980 | ||
5578689a | 1981 | int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
1da177e4 | 1982 | { |
86872cb5 | 1983 | struct fib6_config cfg; |
1da177e4 LT |
1984 | struct in6_rtmsg rtmsg; |
1985 | int err; | |
1986 | ||
1987 | switch(cmd) { | |
1988 | case SIOCADDRT: /* Add a route */ | |
1989 | case SIOCDELRT: /* Delete a route */ | |
1990 | if (!capable(CAP_NET_ADMIN)) | |
1991 | return -EPERM; | |
1992 | err = copy_from_user(&rtmsg, arg, | |
1993 | sizeof(struct in6_rtmsg)); | |
1994 | if (err) | |
1995 | return -EFAULT; | |
86872cb5 | 1996 | |
5578689a | 1997 | rtmsg_to_fib6_config(net, &rtmsg, &cfg); |
86872cb5 | 1998 | |
1da177e4 LT |
1999 | rtnl_lock(); |
2000 | switch (cmd) { | |
2001 | case SIOCADDRT: | |
86872cb5 | 2002 | err = ip6_route_add(&cfg); |
1da177e4 LT |
2003 | break; |
2004 | case SIOCDELRT: | |
86872cb5 | 2005 | err = ip6_route_del(&cfg); |
1da177e4 LT |
2006 | break; |
2007 | default: | |
2008 | err = -EINVAL; | |
2009 | } | |
2010 | rtnl_unlock(); | |
2011 | ||
2012 | return err; | |
3ff50b79 | 2013 | } |
1da177e4 LT |
2014 | |
2015 | return -EINVAL; | |
2016 | } | |
2017 | ||
2018 | /* | |
2019 | * Drop the packet on the floor | |
2020 | */ | |
2021 | ||
d5fdd6ba | 2022 | static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes) |
1da177e4 | 2023 | { |
612f09e8 | 2024 | int type; |
adf30907 | 2025 | struct dst_entry *dst = skb_dst(skb); |
612f09e8 YH |
2026 | switch (ipstats_mib_noroutes) { |
2027 | case IPSTATS_MIB_INNOROUTES: | |
0660e03f | 2028 | type = ipv6_addr_type(&ipv6_hdr(skb)->daddr); |
45bb0060 | 2029 | if (type == IPV6_ADDR_ANY) { |
3bd653c8 DL |
2030 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
2031 | IPSTATS_MIB_INADDRERRORS); | |
612f09e8 YH |
2032 | break; |
2033 | } | |
2034 | /* FALLTHROUGH */ | |
2035 | case IPSTATS_MIB_OUTNOROUTES: | |
3bd653c8 DL |
2036 | IP6_INC_STATS(dev_net(dst->dev), ip6_dst_idev(dst), |
2037 | ipstats_mib_noroutes); | |
612f09e8 YH |
2038 | break; |
2039 | } | |
3ffe533c | 2040 | icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0); |
1da177e4 LT |
2041 | kfree_skb(skb); |
2042 | return 0; | |
2043 | } | |
2044 | ||
9ce8ade0 TG |
2045 | static int ip6_pkt_discard(struct sk_buff *skb) |
2046 | { | |
612f09e8 | 2047 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES); |
9ce8ade0 TG |
2048 | } |
2049 | ||
20380731 | 2050 | static int ip6_pkt_discard_out(struct sk_buff *skb) |
1da177e4 | 2051 | { |
adf30907 | 2052 | skb->dev = skb_dst(skb)->dev; |
612f09e8 | 2053 | return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES); |
1da177e4 LT |
2054 | } |
2055 | ||
6723ab54 DM |
2056 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
2057 | ||
9ce8ade0 TG |
2058 | static int ip6_pkt_prohibit(struct sk_buff *skb) |
2059 | { | |
612f09e8 | 2060 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES); |
9ce8ade0 TG |
2061 | } |
2062 | ||
2063 | static int ip6_pkt_prohibit_out(struct sk_buff *skb) | |
2064 | { | |
adf30907 | 2065 | skb->dev = skb_dst(skb)->dev; |
612f09e8 | 2066 | return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES); |
9ce8ade0 TG |
2067 | } |
2068 | ||
6723ab54 DM |
2069 | #endif |
2070 | ||
1da177e4 LT |
2071 | /* |
2072 | * Allocate a dst for local (unicast / anycast) address. | |
2073 | */ | |
2074 | ||
2075 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, | |
2076 | const struct in6_addr *addr, | |
8f031519 | 2077 | bool anycast) |
1da177e4 | 2078 | { |
c346dca1 | 2079 | struct net *net = dev_net(idev->dev); |
8b96d22d | 2080 | struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, 0, NULL); |
f83c7790 | 2081 | int err; |
1da177e4 | 2082 | |
38308473 | 2083 | if (!rt) { |
f3213831 | 2084 | net_warn_ratelimited("Maximum number of routes reached, consider increasing route/max_size\n"); |
1da177e4 | 2085 | return ERR_PTR(-ENOMEM); |
40385653 | 2086 | } |
1da177e4 | 2087 | |
1da177e4 LT |
2088 | in6_dev_hold(idev); |
2089 | ||
11d53b49 | 2090 | rt->dst.flags |= DST_HOST; |
d8d1f30b CG |
2091 | rt->dst.input = ip6_input; |
2092 | rt->dst.output = ip6_output; | |
1da177e4 | 2093 | rt->rt6i_idev = idev; |
1da177e4 LT |
2094 | |
2095 | rt->rt6i_flags = RTF_UP | RTF_NONEXTHOP; | |
58c4fb86 YH |
2096 | if (anycast) |
2097 | rt->rt6i_flags |= RTF_ANYCAST; | |
2098 | else | |
1da177e4 | 2099 | rt->rt6i_flags |= RTF_LOCAL; |
8ade06c6 | 2100 | err = rt6_bind_neighbour(rt, rt->dst.dev); |
f83c7790 | 2101 | if (err) { |
d8d1f30b | 2102 | dst_free(&rt->dst); |
f83c7790 | 2103 | return ERR_PTR(err); |
1da177e4 LT |
2104 | } |
2105 | ||
4e3fd7a0 | 2106 | rt->rt6i_dst.addr = *addr; |
1da177e4 | 2107 | rt->rt6i_dst.plen = 128; |
5578689a | 2108 | rt->rt6i_table = fib6_get_table(net, RT6_TABLE_LOCAL); |
1da177e4 | 2109 | |
d8d1f30b | 2110 | atomic_set(&rt->dst.__refcnt, 1); |
1da177e4 LT |
2111 | |
2112 | return rt; | |
2113 | } | |
2114 | ||
c3968a85 DW |
2115 | int ip6_route_get_saddr(struct net *net, |
2116 | struct rt6_info *rt, | |
b71d1d42 | 2117 | const struct in6_addr *daddr, |
c3968a85 DW |
2118 | unsigned int prefs, |
2119 | struct in6_addr *saddr) | |
2120 | { | |
2121 | struct inet6_dev *idev = ip6_dst_idev((struct dst_entry*)rt); | |
2122 | int err = 0; | |
2123 | if (rt->rt6i_prefsrc.plen) | |
4e3fd7a0 | 2124 | *saddr = rt->rt6i_prefsrc.addr; |
c3968a85 DW |
2125 | else |
2126 | err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, | |
2127 | daddr, prefs, saddr); | |
2128 | return err; | |
2129 | } | |
2130 | ||
2131 | /* remove deleted ip from prefsrc entries */ | |
2132 | struct arg_dev_net_ip { | |
2133 | struct net_device *dev; | |
2134 | struct net *net; | |
2135 | struct in6_addr *addr; | |
2136 | }; | |
2137 | ||
2138 | static int fib6_remove_prefsrc(struct rt6_info *rt, void *arg) | |
2139 | { | |
2140 | struct net_device *dev = ((struct arg_dev_net_ip *)arg)->dev; | |
2141 | struct net *net = ((struct arg_dev_net_ip *)arg)->net; | |
2142 | struct in6_addr *addr = ((struct arg_dev_net_ip *)arg)->addr; | |
2143 | ||
d1918542 | 2144 | if (((void *)rt->dst.dev == dev || !dev) && |
c3968a85 DW |
2145 | rt != net->ipv6.ip6_null_entry && |
2146 | ipv6_addr_equal(addr, &rt->rt6i_prefsrc.addr)) { | |
2147 | /* remove prefsrc entry */ | |
2148 | rt->rt6i_prefsrc.plen = 0; | |
2149 | } | |
2150 | return 0; | |
2151 | } | |
2152 | ||
2153 | void rt6_remove_prefsrc(struct inet6_ifaddr *ifp) | |
2154 | { | |
2155 | struct net *net = dev_net(ifp->idev->dev); | |
2156 | struct arg_dev_net_ip adni = { | |
2157 | .dev = ifp->idev->dev, | |
2158 | .net = net, | |
2159 | .addr = &ifp->addr, | |
2160 | }; | |
2161 | fib6_clean_all(net, fib6_remove_prefsrc, 0, &adni); | |
2162 | } | |
2163 | ||
8ed67789 DL |
2164 | struct arg_dev_net { |
2165 | struct net_device *dev; | |
2166 | struct net *net; | |
2167 | }; | |
2168 | ||
1da177e4 LT |
2169 | static int fib6_ifdown(struct rt6_info *rt, void *arg) |
2170 | { | |
bc3ef660 | 2171 | const struct arg_dev_net *adn = arg; |
2172 | const struct net_device *dev = adn->dev; | |
8ed67789 | 2173 | |
d1918542 | 2174 | if ((rt->dst.dev == dev || !dev) && |
c159d30c | 2175 | rt != adn->net->ipv6.ip6_null_entry) |
1da177e4 | 2176 | return -1; |
c159d30c | 2177 | |
1da177e4 LT |
2178 | return 0; |
2179 | } | |
2180 | ||
f3db4851 | 2181 | void rt6_ifdown(struct net *net, struct net_device *dev) |
1da177e4 | 2182 | { |
8ed67789 DL |
2183 | struct arg_dev_net adn = { |
2184 | .dev = dev, | |
2185 | .net = net, | |
2186 | }; | |
2187 | ||
2188 | fib6_clean_all(net, fib6_ifdown, 0, &adn); | |
1e493d19 | 2189 | icmp6_clean_all(fib6_ifdown, &adn); |
1da177e4 LT |
2190 | } |
2191 | ||
95c96174 | 2192 | struct rt6_mtu_change_arg { |
1da177e4 | 2193 | struct net_device *dev; |
95c96174 | 2194 | unsigned int mtu; |
1da177e4 LT |
2195 | }; |
2196 | ||
2197 | static int rt6_mtu_change_route(struct rt6_info *rt, void *p_arg) | |
2198 | { | |
2199 | struct rt6_mtu_change_arg *arg = (struct rt6_mtu_change_arg *) p_arg; | |
2200 | struct inet6_dev *idev; | |
2201 | ||
2202 | /* In IPv6 pmtu discovery is not optional, | |
2203 | so that RTAX_MTU lock cannot disable it. | |
2204 | We still use this lock to block changes | |
2205 | caused by addrconf/ndisc. | |
2206 | */ | |
2207 | ||
2208 | idev = __in6_dev_get(arg->dev); | |
38308473 | 2209 | if (!idev) |
1da177e4 LT |
2210 | return 0; |
2211 | ||
2212 | /* For administrative MTU increase, there is no way to discover | |
2213 | IPv6 PMTU increase, so PMTU increase should be updated here. | |
2214 | Since RFC 1981 doesn't include administrative MTU increase | |
2215 | update PMTU increase is a MUST. (i.e. jumbo frame) | |
2216 | */ | |
2217 | /* | |
2218 | If new MTU is less than route PMTU, this new MTU will be the | |
2219 | lowest MTU in the path, update the route PMTU to reflect PMTU | |
2220 | decreases; if new MTU is greater than route PMTU, and the | |
2221 | old MTU is the lowest MTU in the path, update the route PMTU | |
2222 | to reflect the increase. In this case if the other nodes' MTU | |
2223 | also have the lowest MTU, TOO BIG MESSAGE will be lead to | |
2224 | PMTU discouvery. | |
2225 | */ | |
d1918542 | 2226 | if (rt->dst.dev == arg->dev && |
d8d1f30b CG |
2227 | !dst_metric_locked(&rt->dst, RTAX_MTU) && |
2228 | (dst_mtu(&rt->dst) >= arg->mtu || | |
2229 | (dst_mtu(&rt->dst) < arg->mtu && | |
2230 | dst_mtu(&rt->dst) == idev->cnf.mtu6))) { | |
defb3519 | 2231 | dst_metric_set(&rt->dst, RTAX_MTU, arg->mtu); |
566cfd8f | 2232 | } |
1da177e4 LT |
2233 | return 0; |
2234 | } | |
2235 | ||
95c96174 | 2236 | void rt6_mtu_change(struct net_device *dev, unsigned int mtu) |
1da177e4 | 2237 | { |
c71099ac TG |
2238 | struct rt6_mtu_change_arg arg = { |
2239 | .dev = dev, | |
2240 | .mtu = mtu, | |
2241 | }; | |
1da177e4 | 2242 | |
c346dca1 | 2243 | fib6_clean_all(dev_net(dev), rt6_mtu_change_route, 0, &arg); |
1da177e4 LT |
2244 | } |
2245 | ||
ef7c79ed | 2246 | static const struct nla_policy rtm_ipv6_policy[RTA_MAX+1] = { |
5176f91e | 2247 | [RTA_GATEWAY] = { .len = sizeof(struct in6_addr) }, |
86872cb5 | 2248 | [RTA_OIF] = { .type = NLA_U32 }, |
ab364a6f | 2249 | [RTA_IIF] = { .type = NLA_U32 }, |
86872cb5 TG |
2250 | [RTA_PRIORITY] = { .type = NLA_U32 }, |
2251 | [RTA_METRICS] = { .type = NLA_NESTED }, | |
2252 | }; | |
2253 | ||
2254 | static int rtm_to_fib6_config(struct sk_buff *skb, struct nlmsghdr *nlh, | |
2255 | struct fib6_config *cfg) | |
1da177e4 | 2256 | { |
86872cb5 TG |
2257 | struct rtmsg *rtm; |
2258 | struct nlattr *tb[RTA_MAX+1]; | |
2259 | int err; | |
1da177e4 | 2260 | |
86872cb5 TG |
2261 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
2262 | if (err < 0) | |
2263 | goto errout; | |
1da177e4 | 2264 | |
86872cb5 TG |
2265 | err = -EINVAL; |
2266 | rtm = nlmsg_data(nlh); | |
2267 | memset(cfg, 0, sizeof(*cfg)); | |
2268 | ||
2269 | cfg->fc_table = rtm->rtm_table; | |
2270 | cfg->fc_dst_len = rtm->rtm_dst_len; | |
2271 | cfg->fc_src_len = rtm->rtm_src_len; | |
2272 | cfg->fc_flags = RTF_UP; | |
2273 | cfg->fc_protocol = rtm->rtm_protocol; | |
ef2c7d7b | 2274 | cfg->fc_type = rtm->rtm_type; |
86872cb5 | 2275 | |
ef2c7d7b ND |
2276 | if (rtm->rtm_type == RTN_UNREACHABLE || |
2277 | rtm->rtm_type == RTN_BLACKHOLE || | |
b4949ab2 ND |
2278 | rtm->rtm_type == RTN_PROHIBIT || |
2279 | rtm->rtm_type == RTN_THROW) | |
86872cb5 TG |
2280 | cfg->fc_flags |= RTF_REJECT; |
2281 | ||
ab79ad14 MŻ |
2282 | if (rtm->rtm_type == RTN_LOCAL) |
2283 | cfg->fc_flags |= RTF_LOCAL; | |
2284 | ||
15e47304 | 2285 | cfg->fc_nlinfo.portid = NETLINK_CB(skb).portid; |
86872cb5 | 2286 | cfg->fc_nlinfo.nlh = nlh; |
3b1e0a65 | 2287 | cfg->fc_nlinfo.nl_net = sock_net(skb->sk); |
86872cb5 TG |
2288 | |
2289 | if (tb[RTA_GATEWAY]) { | |
2290 | nla_memcpy(&cfg->fc_gateway, tb[RTA_GATEWAY], 16); | |
2291 | cfg->fc_flags |= RTF_GATEWAY; | |
1da177e4 | 2292 | } |
86872cb5 TG |
2293 | |
2294 | if (tb[RTA_DST]) { | |
2295 | int plen = (rtm->rtm_dst_len + 7) >> 3; | |
2296 | ||
2297 | if (nla_len(tb[RTA_DST]) < plen) | |
2298 | goto errout; | |
2299 | ||
2300 | nla_memcpy(&cfg->fc_dst, tb[RTA_DST], plen); | |
1da177e4 | 2301 | } |
86872cb5 TG |
2302 | |
2303 | if (tb[RTA_SRC]) { | |
2304 | int plen = (rtm->rtm_src_len + 7) >> 3; | |
2305 | ||
2306 | if (nla_len(tb[RTA_SRC]) < plen) | |
2307 | goto errout; | |
2308 | ||
2309 | nla_memcpy(&cfg->fc_src, tb[RTA_SRC], plen); | |
1da177e4 | 2310 | } |
86872cb5 | 2311 | |
c3968a85 DW |
2312 | if (tb[RTA_PREFSRC]) |
2313 | nla_memcpy(&cfg->fc_prefsrc, tb[RTA_PREFSRC], 16); | |
2314 | ||
86872cb5 TG |
2315 | if (tb[RTA_OIF]) |
2316 | cfg->fc_ifindex = nla_get_u32(tb[RTA_OIF]); | |
2317 | ||
2318 | if (tb[RTA_PRIORITY]) | |
2319 | cfg->fc_metric = nla_get_u32(tb[RTA_PRIORITY]); | |
2320 | ||
2321 | if (tb[RTA_METRICS]) { | |
2322 | cfg->fc_mx = nla_data(tb[RTA_METRICS]); | |
2323 | cfg->fc_mx_len = nla_len(tb[RTA_METRICS]); | |
1da177e4 | 2324 | } |
86872cb5 TG |
2325 | |
2326 | if (tb[RTA_TABLE]) | |
2327 | cfg->fc_table = nla_get_u32(tb[RTA_TABLE]); | |
2328 | ||
2329 | err = 0; | |
2330 | errout: | |
2331 | return err; | |
1da177e4 LT |
2332 | } |
2333 | ||
c127ea2c | 2334 | static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 2335 | { |
86872cb5 TG |
2336 | struct fib6_config cfg; |
2337 | int err; | |
1da177e4 | 2338 | |
86872cb5 TG |
2339 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
2340 | if (err < 0) | |
2341 | return err; | |
2342 | ||
2343 | return ip6_route_del(&cfg); | |
1da177e4 LT |
2344 | } |
2345 | ||
c127ea2c | 2346 | static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 2347 | { |
86872cb5 TG |
2348 | struct fib6_config cfg; |
2349 | int err; | |
1da177e4 | 2350 | |
86872cb5 TG |
2351 | err = rtm_to_fib6_config(skb, nlh, &cfg); |
2352 | if (err < 0) | |
2353 | return err; | |
2354 | ||
2355 | return ip6_route_add(&cfg); | |
1da177e4 LT |
2356 | } |
2357 | ||
339bf98f TG |
2358 | static inline size_t rt6_nlmsg_size(void) |
2359 | { | |
2360 | return NLMSG_ALIGN(sizeof(struct rtmsg)) | |
2361 | + nla_total_size(16) /* RTA_SRC */ | |
2362 | + nla_total_size(16) /* RTA_DST */ | |
2363 | + nla_total_size(16) /* RTA_GATEWAY */ | |
2364 | + nla_total_size(16) /* RTA_PREFSRC */ | |
2365 | + nla_total_size(4) /* RTA_TABLE */ | |
2366 | + nla_total_size(4) /* RTA_IIF */ | |
2367 | + nla_total_size(4) /* RTA_OIF */ | |
2368 | + nla_total_size(4) /* RTA_PRIORITY */ | |
6a2b9ce0 | 2369 | + RTAX_MAX * nla_total_size(4) /* RTA_METRICS */ |
339bf98f TG |
2370 | + nla_total_size(sizeof(struct rta_cacheinfo)); |
2371 | } | |
2372 | ||
191cd582 BH |
2373 | static int rt6_fill_node(struct net *net, |
2374 | struct sk_buff *skb, struct rt6_info *rt, | |
0d51aa80 | 2375 | struct in6_addr *dst, struct in6_addr *src, |
15e47304 | 2376 | int iif, int type, u32 portid, u32 seq, |
7bc570c8 | 2377 | int prefix, int nowait, unsigned int flags) |
1da177e4 LT |
2378 | { |
2379 | struct rtmsg *rtm; | |
2d7202bf | 2380 | struct nlmsghdr *nlh; |
e3703b3d | 2381 | long expires; |
9e762a4a | 2382 | u32 table; |
f2c31e32 | 2383 | struct neighbour *n; |
1da177e4 LT |
2384 | |
2385 | if (prefix) { /* user wants prefix routes only */ | |
2386 | if (!(rt->rt6i_flags & RTF_PREFIX_RT)) { | |
2387 | /* success since this is not a prefix route */ | |
2388 | return 1; | |
2389 | } | |
2390 | } | |
2391 | ||
15e47304 | 2392 | nlh = nlmsg_put(skb, portid, seq, type, sizeof(*rtm), flags); |
38308473 | 2393 | if (!nlh) |
26932566 | 2394 | return -EMSGSIZE; |
2d7202bf TG |
2395 | |
2396 | rtm = nlmsg_data(nlh); | |
1da177e4 LT |
2397 | rtm->rtm_family = AF_INET6; |
2398 | rtm->rtm_dst_len = rt->rt6i_dst.plen; | |
2399 | rtm->rtm_src_len = rt->rt6i_src.plen; | |
2400 | rtm->rtm_tos = 0; | |
c71099ac | 2401 | if (rt->rt6i_table) |
9e762a4a | 2402 | table = rt->rt6i_table->tb6_id; |
c71099ac | 2403 | else |
9e762a4a PM |
2404 | table = RT6_TABLE_UNSPEC; |
2405 | rtm->rtm_table = table; | |
c78679e8 DM |
2406 | if (nla_put_u32(skb, RTA_TABLE, table)) |
2407 | goto nla_put_failure; | |
ef2c7d7b ND |
2408 | if (rt->rt6i_flags & RTF_REJECT) { |
2409 | switch (rt->dst.error) { | |
2410 | case -EINVAL: | |
2411 | rtm->rtm_type = RTN_BLACKHOLE; | |
2412 | break; | |
2413 | case -EACCES: | |
2414 | rtm->rtm_type = RTN_PROHIBIT; | |
2415 | break; | |
b4949ab2 ND |
2416 | case -EAGAIN: |
2417 | rtm->rtm_type = RTN_THROW; | |
2418 | break; | |
ef2c7d7b ND |
2419 | default: |
2420 | rtm->rtm_type = RTN_UNREACHABLE; | |
2421 | break; | |
2422 | } | |
2423 | } | |
38308473 | 2424 | else if (rt->rt6i_flags & RTF_LOCAL) |
ab79ad14 | 2425 | rtm->rtm_type = RTN_LOCAL; |
d1918542 | 2426 | else if (rt->dst.dev && (rt->dst.dev->flags & IFF_LOOPBACK)) |
1da177e4 LT |
2427 | rtm->rtm_type = RTN_LOCAL; |
2428 | else | |
2429 | rtm->rtm_type = RTN_UNICAST; | |
2430 | rtm->rtm_flags = 0; | |
2431 | rtm->rtm_scope = RT_SCOPE_UNIVERSE; | |
2432 | rtm->rtm_protocol = rt->rt6i_protocol; | |
38308473 | 2433 | if (rt->rt6i_flags & RTF_DYNAMIC) |
1da177e4 | 2434 | rtm->rtm_protocol = RTPROT_REDIRECT; |
f0396f60 DO |
2435 | else if (rt->rt6i_flags & RTF_ADDRCONF) { |
2436 | if (rt->rt6i_flags & (RTF_DEFAULT | RTF_ROUTEINFO)) | |
2437 | rtm->rtm_protocol = RTPROT_RA; | |
2438 | else | |
2439 | rtm->rtm_protocol = RTPROT_KERNEL; | |
2440 | } | |
1da177e4 | 2441 | |
38308473 | 2442 | if (rt->rt6i_flags & RTF_CACHE) |
1da177e4 LT |
2443 | rtm->rtm_flags |= RTM_F_CLONED; |
2444 | ||
2445 | if (dst) { | |
c78679e8 DM |
2446 | if (nla_put(skb, RTA_DST, 16, dst)) |
2447 | goto nla_put_failure; | |
1ab1457c | 2448 | rtm->rtm_dst_len = 128; |
1da177e4 | 2449 | } else if (rtm->rtm_dst_len) |
c78679e8 DM |
2450 | if (nla_put(skb, RTA_DST, 16, &rt->rt6i_dst.addr)) |
2451 | goto nla_put_failure; | |
1da177e4 LT |
2452 | #ifdef CONFIG_IPV6_SUBTREES |
2453 | if (src) { | |
c78679e8 DM |
2454 | if (nla_put(skb, RTA_SRC, 16, src)) |
2455 | goto nla_put_failure; | |
1ab1457c | 2456 | rtm->rtm_src_len = 128; |
c78679e8 DM |
2457 | } else if (rtm->rtm_src_len && |
2458 | nla_put(skb, RTA_SRC, 16, &rt->rt6i_src.addr)) | |
2459 | goto nla_put_failure; | |
1da177e4 | 2460 | #endif |
7bc570c8 YH |
2461 | if (iif) { |
2462 | #ifdef CONFIG_IPV6_MROUTE | |
2463 | if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) { | |
8229efda | 2464 | int err = ip6mr_get_route(net, skb, rtm, nowait); |
7bc570c8 YH |
2465 | if (err <= 0) { |
2466 | if (!nowait) { | |
2467 | if (err == 0) | |
2468 | return 0; | |
2469 | goto nla_put_failure; | |
2470 | } else { | |
2471 | if (err == -EMSGSIZE) | |
2472 | goto nla_put_failure; | |
2473 | } | |
2474 | } | |
2475 | } else | |
2476 | #endif | |
c78679e8 DM |
2477 | if (nla_put_u32(skb, RTA_IIF, iif)) |
2478 | goto nla_put_failure; | |
7bc570c8 | 2479 | } else if (dst) { |
1da177e4 | 2480 | struct in6_addr saddr_buf; |
c78679e8 DM |
2481 | if (ip6_route_get_saddr(net, rt, dst, 0, &saddr_buf) == 0 && |
2482 | nla_put(skb, RTA_PREFSRC, 16, &saddr_buf)) | |
2483 | goto nla_put_failure; | |
1da177e4 | 2484 | } |
2d7202bf | 2485 | |
c3968a85 DW |
2486 | if (rt->rt6i_prefsrc.plen) { |
2487 | struct in6_addr saddr_buf; | |
4e3fd7a0 | 2488 | saddr_buf = rt->rt6i_prefsrc.addr; |
c78679e8 DM |
2489 | if (nla_put(skb, RTA_PREFSRC, 16, &saddr_buf)) |
2490 | goto nla_put_failure; | |
c3968a85 DW |
2491 | } |
2492 | ||
defb3519 | 2493 | if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0) |
2d7202bf TG |
2494 | goto nla_put_failure; |
2495 | ||
97cac082 | 2496 | n = rt->n; |
94f826b8 | 2497 | if (n) { |
fdd6681d | 2498 | if (nla_put(skb, RTA_GATEWAY, 16, &n->primary_key) < 0) |
94f826b8 | 2499 | goto nla_put_failure; |
94f826b8 | 2500 | } |
2d7202bf | 2501 | |
c78679e8 DM |
2502 | if (rt->dst.dev && |
2503 | nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) | |
2504 | goto nla_put_failure; | |
2505 | if (nla_put_u32(skb, RTA_PRIORITY, rt->rt6i_metric)) | |
2506 | goto nla_put_failure; | |
8253947e LW |
2507 | |
2508 | expires = (rt->rt6i_flags & RTF_EXPIRES) ? rt->dst.expires - jiffies : 0; | |
69cdf8f9 | 2509 | |
87a50699 | 2510 | if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, rt->dst.error) < 0) |
e3703b3d | 2511 | goto nla_put_failure; |
2d7202bf TG |
2512 | |
2513 | return nlmsg_end(skb, nlh); | |
2514 | ||
2515 | nla_put_failure: | |
26932566 PM |
2516 | nlmsg_cancel(skb, nlh); |
2517 | return -EMSGSIZE; | |
1da177e4 LT |
2518 | } |
2519 | ||
1b43af54 | 2520 | int rt6_dump_route(struct rt6_info *rt, void *p_arg) |
1da177e4 LT |
2521 | { |
2522 | struct rt6_rtnl_dump_arg *arg = (struct rt6_rtnl_dump_arg *) p_arg; | |
2523 | int prefix; | |
2524 | ||
2d7202bf TG |
2525 | if (nlmsg_len(arg->cb->nlh) >= sizeof(struct rtmsg)) { |
2526 | struct rtmsg *rtm = nlmsg_data(arg->cb->nlh); | |
1da177e4 LT |
2527 | prefix = (rtm->rtm_flags & RTM_F_PREFIX) != 0; |
2528 | } else | |
2529 | prefix = 0; | |
2530 | ||
191cd582 BH |
2531 | return rt6_fill_node(arg->net, |
2532 | arg->skb, rt, NULL, NULL, 0, RTM_NEWROUTE, | |
15e47304 | 2533 | NETLINK_CB(arg->cb->skb).portid, arg->cb->nlh->nlmsg_seq, |
7bc570c8 | 2534 | prefix, 0, NLM_F_MULTI); |
1da177e4 LT |
2535 | } |
2536 | ||
c127ea2c | 2537 | static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 2538 | { |
3b1e0a65 | 2539 | struct net *net = sock_net(in_skb->sk); |
ab364a6f TG |
2540 | struct nlattr *tb[RTA_MAX+1]; |
2541 | struct rt6_info *rt; | |
1da177e4 | 2542 | struct sk_buff *skb; |
ab364a6f | 2543 | struct rtmsg *rtm; |
4c9483b2 | 2544 | struct flowi6 fl6; |
72331bc0 | 2545 | int err, iif = 0, oif = 0; |
1da177e4 | 2546 | |
ab364a6f TG |
2547 | err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy); |
2548 | if (err < 0) | |
2549 | goto errout; | |
1da177e4 | 2550 | |
ab364a6f | 2551 | err = -EINVAL; |
4c9483b2 | 2552 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 | 2553 | |
ab364a6f TG |
2554 | if (tb[RTA_SRC]) { |
2555 | if (nla_len(tb[RTA_SRC]) < sizeof(struct in6_addr)) | |
2556 | goto errout; | |
2557 | ||
4e3fd7a0 | 2558 | fl6.saddr = *(struct in6_addr *)nla_data(tb[RTA_SRC]); |
ab364a6f TG |
2559 | } |
2560 | ||
2561 | if (tb[RTA_DST]) { | |
2562 | if (nla_len(tb[RTA_DST]) < sizeof(struct in6_addr)) | |
2563 | goto errout; | |
2564 | ||
4e3fd7a0 | 2565 | fl6.daddr = *(struct in6_addr *)nla_data(tb[RTA_DST]); |
ab364a6f TG |
2566 | } |
2567 | ||
2568 | if (tb[RTA_IIF]) | |
2569 | iif = nla_get_u32(tb[RTA_IIF]); | |
2570 | ||
2571 | if (tb[RTA_OIF]) | |
72331bc0 | 2572 | oif = nla_get_u32(tb[RTA_OIF]); |
1da177e4 LT |
2573 | |
2574 | if (iif) { | |
2575 | struct net_device *dev; | |
72331bc0 SL |
2576 | int flags = 0; |
2577 | ||
5578689a | 2578 | dev = __dev_get_by_index(net, iif); |
1da177e4 LT |
2579 | if (!dev) { |
2580 | err = -ENODEV; | |
ab364a6f | 2581 | goto errout; |
1da177e4 | 2582 | } |
72331bc0 SL |
2583 | |
2584 | fl6.flowi6_iif = iif; | |
2585 | ||
2586 | if (!ipv6_addr_any(&fl6.saddr)) | |
2587 | flags |= RT6_LOOKUP_F_HAS_SADDR; | |
2588 | ||
2589 | rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6, | |
2590 | flags); | |
2591 | } else { | |
2592 | fl6.flowi6_oif = oif; | |
2593 | ||
2594 | rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6); | |
1da177e4 LT |
2595 | } |
2596 | ||
ab364a6f | 2597 | skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); |
38308473 | 2598 | if (!skb) { |
2173bff5 | 2599 | dst_release(&rt->dst); |
ab364a6f TG |
2600 | err = -ENOBUFS; |
2601 | goto errout; | |
2602 | } | |
1da177e4 | 2603 | |
ab364a6f TG |
2604 | /* Reserve room for dummy headers, this skb can pass |
2605 | through good chunk of routing engine. | |
2606 | */ | |
459a98ed | 2607 | skb_reset_mac_header(skb); |
ab364a6f | 2608 | skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr)); |
1da177e4 | 2609 | |
d8d1f30b | 2610 | skb_dst_set(skb, &rt->dst); |
1da177e4 | 2611 | |
4c9483b2 | 2612 | err = rt6_fill_node(net, skb, rt, &fl6.daddr, &fl6.saddr, iif, |
15e47304 | 2613 | RTM_NEWROUTE, NETLINK_CB(in_skb).portid, |
7bc570c8 | 2614 | nlh->nlmsg_seq, 0, 0, 0); |
1da177e4 | 2615 | if (err < 0) { |
ab364a6f TG |
2616 | kfree_skb(skb); |
2617 | goto errout; | |
1da177e4 LT |
2618 | } |
2619 | ||
15e47304 | 2620 | err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); |
ab364a6f | 2621 | errout: |
1da177e4 | 2622 | return err; |
1da177e4 LT |
2623 | } |
2624 | ||
86872cb5 | 2625 | void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info) |
1da177e4 LT |
2626 | { |
2627 | struct sk_buff *skb; | |
5578689a | 2628 | struct net *net = info->nl_net; |
528c4ceb DL |
2629 | u32 seq; |
2630 | int err; | |
2631 | ||
2632 | err = -ENOBUFS; | |
38308473 | 2633 | seq = info->nlh ? info->nlh->nlmsg_seq : 0; |
86872cb5 | 2634 | |
339bf98f | 2635 | skb = nlmsg_new(rt6_nlmsg_size(), gfp_any()); |
38308473 | 2636 | if (!skb) |
21713ebc TG |
2637 | goto errout; |
2638 | ||
191cd582 | 2639 | err = rt6_fill_node(net, skb, rt, NULL, NULL, 0, |
15e47304 | 2640 | event, info->portid, seq, 0, 0, 0); |
26932566 PM |
2641 | if (err < 0) { |
2642 | /* -EMSGSIZE implies BUG in rt6_nlmsg_size() */ | |
2643 | WARN_ON(err == -EMSGSIZE); | |
2644 | kfree_skb(skb); | |
2645 | goto errout; | |
2646 | } | |
15e47304 | 2647 | rtnl_notify(skb, net, info->portid, RTNLGRP_IPV6_ROUTE, |
1ce85fe4 PNA |
2648 | info->nlh, gfp_any()); |
2649 | return; | |
21713ebc TG |
2650 | errout: |
2651 | if (err < 0) | |
5578689a | 2652 | rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); |
1da177e4 LT |
2653 | } |
2654 | ||
8ed67789 DL |
2655 | static int ip6_route_dev_notify(struct notifier_block *this, |
2656 | unsigned long event, void *data) | |
2657 | { | |
2658 | struct net_device *dev = (struct net_device *)data; | |
c346dca1 | 2659 | struct net *net = dev_net(dev); |
8ed67789 DL |
2660 | |
2661 | if (event == NETDEV_REGISTER && (dev->flags & IFF_LOOPBACK)) { | |
d8d1f30b | 2662 | net->ipv6.ip6_null_entry->dst.dev = dev; |
8ed67789 DL |
2663 | net->ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(dev); |
2664 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
d8d1f30b | 2665 | net->ipv6.ip6_prohibit_entry->dst.dev = dev; |
8ed67789 | 2666 | net->ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(dev); |
d8d1f30b | 2667 | net->ipv6.ip6_blk_hole_entry->dst.dev = dev; |
8ed67789 DL |
2668 | net->ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(dev); |
2669 | #endif | |
2670 | } | |
2671 | ||
2672 | return NOTIFY_OK; | |
2673 | } | |
2674 | ||
1da177e4 LT |
2675 | /* |
2676 | * /proc | |
2677 | */ | |
2678 | ||
2679 | #ifdef CONFIG_PROC_FS | |
2680 | ||
1da177e4 LT |
2681 | struct rt6_proc_arg |
2682 | { | |
2683 | char *buffer; | |
2684 | int offset; | |
2685 | int length; | |
2686 | int skip; | |
2687 | int len; | |
2688 | }; | |
2689 | ||
2690 | static int rt6_info_route(struct rt6_info *rt, void *p_arg) | |
2691 | { | |
33120b30 | 2692 | struct seq_file *m = p_arg; |
69cce1d1 | 2693 | struct neighbour *n; |
1da177e4 | 2694 | |
4b7a4274 | 2695 | seq_printf(m, "%pi6 %02x ", &rt->rt6i_dst.addr, rt->rt6i_dst.plen); |
1da177e4 LT |
2696 | |
2697 | #ifdef CONFIG_IPV6_SUBTREES | |
4b7a4274 | 2698 | seq_printf(m, "%pi6 %02x ", &rt->rt6i_src.addr, rt->rt6i_src.plen); |
1da177e4 | 2699 | #else |
33120b30 | 2700 | seq_puts(m, "00000000000000000000000000000000 00 "); |
1da177e4 | 2701 | #endif |
97cac082 | 2702 | n = rt->n; |
69cce1d1 DM |
2703 | if (n) { |
2704 | seq_printf(m, "%pi6", n->primary_key); | |
1da177e4 | 2705 | } else { |
33120b30 | 2706 | seq_puts(m, "00000000000000000000000000000000"); |
1da177e4 | 2707 | } |
33120b30 | 2708 | seq_printf(m, " %08x %08x %08x %08x %8s\n", |
d8d1f30b CG |
2709 | rt->rt6i_metric, atomic_read(&rt->dst.__refcnt), |
2710 | rt->dst.__use, rt->rt6i_flags, | |
d1918542 | 2711 | rt->dst.dev ? rt->dst.dev->name : ""); |
1da177e4 LT |
2712 | return 0; |
2713 | } | |
2714 | ||
33120b30 | 2715 | static int ipv6_route_show(struct seq_file *m, void *v) |
1da177e4 | 2716 | { |
f3db4851 | 2717 | struct net *net = (struct net *)m->private; |
32b293a5 | 2718 | fib6_clean_all_ro(net, rt6_info_route, 0, m); |
33120b30 AD |
2719 | return 0; |
2720 | } | |
1da177e4 | 2721 | |
33120b30 AD |
2722 | static int ipv6_route_open(struct inode *inode, struct file *file) |
2723 | { | |
de05c557 | 2724 | return single_open_net(inode, file, ipv6_route_show); |
f3db4851 DL |
2725 | } |
2726 | ||
33120b30 AD |
2727 | static const struct file_operations ipv6_route_proc_fops = { |
2728 | .owner = THIS_MODULE, | |
2729 | .open = ipv6_route_open, | |
2730 | .read = seq_read, | |
2731 | .llseek = seq_lseek, | |
b6fcbdb4 | 2732 | .release = single_release_net, |
33120b30 AD |
2733 | }; |
2734 | ||
1da177e4 LT |
2735 | static int rt6_stats_seq_show(struct seq_file *seq, void *v) |
2736 | { | |
69ddb805 | 2737 | struct net *net = (struct net *)seq->private; |
1da177e4 | 2738 | seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n", |
69ddb805 DL |
2739 | net->ipv6.rt6_stats->fib_nodes, |
2740 | net->ipv6.rt6_stats->fib_route_nodes, | |
2741 | net->ipv6.rt6_stats->fib_rt_alloc, | |
2742 | net->ipv6.rt6_stats->fib_rt_entries, | |
2743 | net->ipv6.rt6_stats->fib_rt_cache, | |
fc66f95c | 2744 | dst_entries_get_slow(&net->ipv6.ip6_dst_ops), |
69ddb805 | 2745 | net->ipv6.rt6_stats->fib_discarded_routes); |
1da177e4 LT |
2746 | |
2747 | return 0; | |
2748 | } | |
2749 | ||
2750 | static int rt6_stats_seq_open(struct inode *inode, struct file *file) | |
2751 | { | |
de05c557 | 2752 | return single_open_net(inode, file, rt6_stats_seq_show); |
69ddb805 DL |
2753 | } |
2754 | ||
9a32144e | 2755 | static const struct file_operations rt6_stats_seq_fops = { |
1da177e4 LT |
2756 | .owner = THIS_MODULE, |
2757 | .open = rt6_stats_seq_open, | |
2758 | .read = seq_read, | |
2759 | .llseek = seq_lseek, | |
b6fcbdb4 | 2760 | .release = single_release_net, |
1da177e4 LT |
2761 | }; |
2762 | #endif /* CONFIG_PROC_FS */ | |
2763 | ||
2764 | #ifdef CONFIG_SYSCTL | |
2765 | ||
1da177e4 | 2766 | static |
8d65af78 | 2767 | int ipv6_sysctl_rtcache_flush(ctl_table *ctl, int write, |
1da177e4 LT |
2768 | void __user *buffer, size_t *lenp, loff_t *ppos) |
2769 | { | |
c486da34 LAG |
2770 | struct net *net; |
2771 | int delay; | |
2772 | if (!write) | |
1da177e4 | 2773 | return -EINVAL; |
c486da34 LAG |
2774 | |
2775 | net = (struct net *)ctl->extra1; | |
2776 | delay = net->ipv6.sysctl.flush_delay; | |
2777 | proc_dointvec(ctl, write, buffer, lenp, ppos); | |
2778 | fib6_run_gc(delay <= 0 ? ~0UL : (unsigned long)delay, net); | |
2779 | return 0; | |
1da177e4 LT |
2780 | } |
2781 | ||
760f2d01 | 2782 | ctl_table ipv6_route_table_template[] = { |
1ab1457c | 2783 | { |
1da177e4 | 2784 | .procname = "flush", |
4990509f | 2785 | .data = &init_net.ipv6.sysctl.flush_delay, |
1da177e4 | 2786 | .maxlen = sizeof(int), |
89c8b3a1 | 2787 | .mode = 0200, |
6d9f239a | 2788 | .proc_handler = ipv6_sysctl_rtcache_flush |
1da177e4 LT |
2789 | }, |
2790 | { | |
1da177e4 | 2791 | .procname = "gc_thresh", |
9a7ec3a9 | 2792 | .data = &ip6_dst_ops_template.gc_thresh, |
1da177e4 LT |
2793 | .maxlen = sizeof(int), |
2794 | .mode = 0644, | |
6d9f239a | 2795 | .proc_handler = proc_dointvec, |
1da177e4 LT |
2796 | }, |
2797 | { | |
1da177e4 | 2798 | .procname = "max_size", |
4990509f | 2799 | .data = &init_net.ipv6.sysctl.ip6_rt_max_size, |
1da177e4 LT |
2800 | .maxlen = sizeof(int), |
2801 | .mode = 0644, | |
6d9f239a | 2802 | .proc_handler = proc_dointvec, |
1da177e4 LT |
2803 | }, |
2804 | { | |
1da177e4 | 2805 | .procname = "gc_min_interval", |
4990509f | 2806 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
1da177e4 LT |
2807 | .maxlen = sizeof(int), |
2808 | .mode = 0644, | |
6d9f239a | 2809 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
2810 | }, |
2811 | { | |
1da177e4 | 2812 | .procname = "gc_timeout", |
4990509f | 2813 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_timeout, |
1da177e4 LT |
2814 | .maxlen = sizeof(int), |
2815 | .mode = 0644, | |
6d9f239a | 2816 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
2817 | }, |
2818 | { | |
1da177e4 | 2819 | .procname = "gc_interval", |
4990509f | 2820 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_interval, |
1da177e4 LT |
2821 | .maxlen = sizeof(int), |
2822 | .mode = 0644, | |
6d9f239a | 2823 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
2824 | }, |
2825 | { | |
1da177e4 | 2826 | .procname = "gc_elasticity", |
4990509f | 2827 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_elasticity, |
1da177e4 LT |
2828 | .maxlen = sizeof(int), |
2829 | .mode = 0644, | |
f3d3f616 | 2830 | .proc_handler = proc_dointvec, |
1da177e4 LT |
2831 | }, |
2832 | { | |
1da177e4 | 2833 | .procname = "mtu_expires", |
4990509f | 2834 | .data = &init_net.ipv6.sysctl.ip6_rt_mtu_expires, |
1da177e4 LT |
2835 | .maxlen = sizeof(int), |
2836 | .mode = 0644, | |
6d9f239a | 2837 | .proc_handler = proc_dointvec_jiffies, |
1da177e4 LT |
2838 | }, |
2839 | { | |
1da177e4 | 2840 | .procname = "min_adv_mss", |
4990509f | 2841 | .data = &init_net.ipv6.sysctl.ip6_rt_min_advmss, |
1da177e4 LT |
2842 | .maxlen = sizeof(int), |
2843 | .mode = 0644, | |
f3d3f616 | 2844 | .proc_handler = proc_dointvec, |
1da177e4 LT |
2845 | }, |
2846 | { | |
1da177e4 | 2847 | .procname = "gc_min_interval_ms", |
4990509f | 2848 | .data = &init_net.ipv6.sysctl.ip6_rt_gc_min_interval, |
1da177e4 LT |
2849 | .maxlen = sizeof(int), |
2850 | .mode = 0644, | |
6d9f239a | 2851 | .proc_handler = proc_dointvec_ms_jiffies, |
1da177e4 | 2852 | }, |
f8572d8f | 2853 | { } |
1da177e4 LT |
2854 | }; |
2855 | ||
2c8c1e72 | 2856 | struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net) |
760f2d01 DL |
2857 | { |
2858 | struct ctl_table *table; | |
2859 | ||
2860 | table = kmemdup(ipv6_route_table_template, | |
2861 | sizeof(ipv6_route_table_template), | |
2862 | GFP_KERNEL); | |
5ee09105 YH |
2863 | |
2864 | if (table) { | |
2865 | table[0].data = &net->ipv6.sysctl.flush_delay; | |
c486da34 | 2866 | table[0].extra1 = net; |
86393e52 | 2867 | table[1].data = &net->ipv6.ip6_dst_ops.gc_thresh; |
5ee09105 YH |
2868 | table[2].data = &net->ipv6.sysctl.ip6_rt_max_size; |
2869 | table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; | |
2870 | table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout; | |
2871 | table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval; | |
2872 | table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity; | |
2873 | table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires; | |
2874 | table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss; | |
9c69fabe | 2875 | table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval; |
5ee09105 YH |
2876 | } |
2877 | ||
760f2d01 DL |
2878 | return table; |
2879 | } | |
1da177e4 LT |
2880 | #endif |
2881 | ||
2c8c1e72 | 2882 | static int __net_init ip6_route_net_init(struct net *net) |
cdb18761 | 2883 | { |
633d424b | 2884 | int ret = -ENOMEM; |
8ed67789 | 2885 | |
86393e52 AD |
2886 | memcpy(&net->ipv6.ip6_dst_ops, &ip6_dst_ops_template, |
2887 | sizeof(net->ipv6.ip6_dst_ops)); | |
f2fc6a54 | 2888 | |
fc66f95c ED |
2889 | if (dst_entries_init(&net->ipv6.ip6_dst_ops) < 0) |
2890 | goto out_ip6_dst_ops; | |
2891 | ||
8ed67789 DL |
2892 | net->ipv6.ip6_null_entry = kmemdup(&ip6_null_entry_template, |
2893 | sizeof(*net->ipv6.ip6_null_entry), | |
2894 | GFP_KERNEL); | |
2895 | if (!net->ipv6.ip6_null_entry) | |
fc66f95c | 2896 | goto out_ip6_dst_entries; |
d8d1f30b | 2897 | net->ipv6.ip6_null_entry->dst.path = |
8ed67789 | 2898 | (struct dst_entry *)net->ipv6.ip6_null_entry; |
d8d1f30b | 2899 | net->ipv6.ip6_null_entry->dst.ops = &net->ipv6.ip6_dst_ops; |
62fa8a84 DM |
2900 | dst_init_metrics(&net->ipv6.ip6_null_entry->dst, |
2901 | ip6_template_metrics, true); | |
8ed67789 DL |
2902 | |
2903 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
2904 | net->ipv6.ip6_prohibit_entry = kmemdup(&ip6_prohibit_entry_template, | |
2905 | sizeof(*net->ipv6.ip6_prohibit_entry), | |
2906 | GFP_KERNEL); | |
68fffc67 PZ |
2907 | if (!net->ipv6.ip6_prohibit_entry) |
2908 | goto out_ip6_null_entry; | |
d8d1f30b | 2909 | net->ipv6.ip6_prohibit_entry->dst.path = |
8ed67789 | 2910 | (struct dst_entry *)net->ipv6.ip6_prohibit_entry; |
d8d1f30b | 2911 | net->ipv6.ip6_prohibit_entry->dst.ops = &net->ipv6.ip6_dst_ops; |
62fa8a84 DM |
2912 | dst_init_metrics(&net->ipv6.ip6_prohibit_entry->dst, |
2913 | ip6_template_metrics, true); | |
8ed67789 DL |
2914 | |
2915 | net->ipv6.ip6_blk_hole_entry = kmemdup(&ip6_blk_hole_entry_template, | |
2916 | sizeof(*net->ipv6.ip6_blk_hole_entry), | |
2917 | GFP_KERNEL); | |
68fffc67 PZ |
2918 | if (!net->ipv6.ip6_blk_hole_entry) |
2919 | goto out_ip6_prohibit_entry; | |
d8d1f30b | 2920 | net->ipv6.ip6_blk_hole_entry->dst.path = |
8ed67789 | 2921 | (struct dst_entry *)net->ipv6.ip6_blk_hole_entry; |
d8d1f30b | 2922 | net->ipv6.ip6_blk_hole_entry->dst.ops = &net->ipv6.ip6_dst_ops; |
62fa8a84 DM |
2923 | dst_init_metrics(&net->ipv6.ip6_blk_hole_entry->dst, |
2924 | ip6_template_metrics, true); | |
8ed67789 DL |
2925 | #endif |
2926 | ||
b339a47c PZ |
2927 | net->ipv6.sysctl.flush_delay = 0; |
2928 | net->ipv6.sysctl.ip6_rt_max_size = 4096; | |
2929 | net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2; | |
2930 | net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ; | |
2931 | net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ; | |
2932 | net->ipv6.sysctl.ip6_rt_gc_elasticity = 9; | |
2933 | net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ; | |
2934 | net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40; | |
2935 | ||
6891a346 BT |
2936 | net->ipv6.ip6_rt_gc_expire = 30*HZ; |
2937 | ||
8ed67789 DL |
2938 | ret = 0; |
2939 | out: | |
2940 | return ret; | |
f2fc6a54 | 2941 | |
68fffc67 PZ |
2942 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
2943 | out_ip6_prohibit_entry: | |
2944 | kfree(net->ipv6.ip6_prohibit_entry); | |
2945 | out_ip6_null_entry: | |
2946 | kfree(net->ipv6.ip6_null_entry); | |
2947 | #endif | |
fc66f95c ED |
2948 | out_ip6_dst_entries: |
2949 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); | |
f2fc6a54 | 2950 | out_ip6_dst_ops: |
f2fc6a54 | 2951 | goto out; |
cdb18761 DL |
2952 | } |
2953 | ||
2c8c1e72 | 2954 | static void __net_exit ip6_route_net_exit(struct net *net) |
cdb18761 | 2955 | { |
8ed67789 DL |
2956 | kfree(net->ipv6.ip6_null_entry); |
2957 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
2958 | kfree(net->ipv6.ip6_prohibit_entry); | |
2959 | kfree(net->ipv6.ip6_blk_hole_entry); | |
2960 | #endif | |
41bb78b4 | 2961 | dst_entries_destroy(&net->ipv6.ip6_dst_ops); |
cdb18761 DL |
2962 | } |
2963 | ||
d189634e TG |
2964 | static int __net_init ip6_route_net_init_late(struct net *net) |
2965 | { | |
2966 | #ifdef CONFIG_PROC_FS | |
2967 | proc_net_fops_create(net, "ipv6_route", 0, &ipv6_route_proc_fops); | |
2968 | proc_net_fops_create(net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops); | |
2969 | #endif | |
2970 | return 0; | |
2971 | } | |
2972 | ||
2973 | static void __net_exit ip6_route_net_exit_late(struct net *net) | |
2974 | { | |
2975 | #ifdef CONFIG_PROC_FS | |
2976 | proc_net_remove(net, "ipv6_route"); | |
2977 | proc_net_remove(net, "rt6_stats"); | |
2978 | #endif | |
2979 | } | |
2980 | ||
cdb18761 DL |
2981 | static struct pernet_operations ip6_route_net_ops = { |
2982 | .init = ip6_route_net_init, | |
2983 | .exit = ip6_route_net_exit, | |
2984 | }; | |
2985 | ||
c3426b47 DM |
2986 | static int __net_init ipv6_inetpeer_init(struct net *net) |
2987 | { | |
2988 | struct inet_peer_base *bp = kmalloc(sizeof(*bp), GFP_KERNEL); | |
2989 | ||
2990 | if (!bp) | |
2991 | return -ENOMEM; | |
2992 | inet_peer_base_init(bp); | |
2993 | net->ipv6.peers = bp; | |
2994 | return 0; | |
2995 | } | |
2996 | ||
2997 | static void __net_exit ipv6_inetpeer_exit(struct net *net) | |
2998 | { | |
2999 | struct inet_peer_base *bp = net->ipv6.peers; | |
3000 | ||
3001 | net->ipv6.peers = NULL; | |
56a6b248 | 3002 | inetpeer_invalidate_tree(bp); |
c3426b47 DM |
3003 | kfree(bp); |
3004 | } | |
3005 | ||
2b823f72 | 3006 | static struct pernet_operations ipv6_inetpeer_ops = { |
c3426b47 DM |
3007 | .init = ipv6_inetpeer_init, |
3008 | .exit = ipv6_inetpeer_exit, | |
3009 | }; | |
3010 | ||
d189634e TG |
3011 | static struct pernet_operations ip6_route_net_late_ops = { |
3012 | .init = ip6_route_net_init_late, | |
3013 | .exit = ip6_route_net_exit_late, | |
3014 | }; | |
3015 | ||
8ed67789 DL |
3016 | static struct notifier_block ip6_route_dev_notifier = { |
3017 | .notifier_call = ip6_route_dev_notify, | |
3018 | .priority = 0, | |
3019 | }; | |
3020 | ||
433d49c3 | 3021 | int __init ip6_route_init(void) |
1da177e4 | 3022 | { |
433d49c3 DL |
3023 | int ret; |
3024 | ||
9a7ec3a9 DL |
3025 | ret = -ENOMEM; |
3026 | ip6_dst_ops_template.kmem_cachep = | |
e5d679f3 | 3027 | kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0, |
f845ab6b | 3028 | SLAB_HWCACHE_ALIGN, NULL); |
9a7ec3a9 | 3029 | if (!ip6_dst_ops_template.kmem_cachep) |
c19a28e1 | 3030 | goto out; |
14e50e57 | 3031 | |
fc66f95c | 3032 | ret = dst_entries_init(&ip6_dst_blackhole_ops); |
8ed67789 | 3033 | if (ret) |
bdb3289f | 3034 | goto out_kmem_cache; |
bdb3289f | 3035 | |
c3426b47 DM |
3036 | ret = register_pernet_subsys(&ipv6_inetpeer_ops); |
3037 | if (ret) | |
e8803b6c | 3038 | goto out_dst_entries; |
2a0c451a | 3039 | |
7e52b33b DM |
3040 | ret = register_pernet_subsys(&ip6_route_net_ops); |
3041 | if (ret) | |
3042 | goto out_register_inetpeer; | |
c3426b47 | 3043 | |
5dc121e9 AE |
3044 | ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops_template.kmem_cachep; |
3045 | ||
8ed67789 DL |
3046 | /* Registering of the loopback is done before this portion of code, |
3047 | * the loopback reference in rt6_info will not be taken, do it | |
3048 | * manually for init_net */ | |
d8d1f30b | 3049 | init_net.ipv6.ip6_null_entry->dst.dev = init_net.loopback_dev; |
8ed67789 DL |
3050 | init_net.ipv6.ip6_null_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
3051 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
d8d1f30b | 3052 | init_net.ipv6.ip6_prohibit_entry->dst.dev = init_net.loopback_dev; |
8ed67789 | 3053 | init_net.ipv6.ip6_prohibit_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
d8d1f30b | 3054 | init_net.ipv6.ip6_blk_hole_entry->dst.dev = init_net.loopback_dev; |
8ed67789 DL |
3055 | init_net.ipv6.ip6_blk_hole_entry->rt6i_idev = in6_dev_get(init_net.loopback_dev); |
3056 | #endif | |
e8803b6c | 3057 | ret = fib6_init(); |
433d49c3 | 3058 | if (ret) |
8ed67789 | 3059 | goto out_register_subsys; |
433d49c3 | 3060 | |
433d49c3 DL |
3061 | ret = xfrm6_init(); |
3062 | if (ret) | |
e8803b6c | 3063 | goto out_fib6_init; |
c35b7e72 | 3064 | |
433d49c3 DL |
3065 | ret = fib6_rules_init(); |
3066 | if (ret) | |
3067 | goto xfrm6_init; | |
7e5449c2 | 3068 | |
d189634e TG |
3069 | ret = register_pernet_subsys(&ip6_route_net_late_ops); |
3070 | if (ret) | |
3071 | goto fib6_rules_init; | |
3072 | ||
433d49c3 | 3073 | ret = -ENOBUFS; |
c7ac8679 GR |
3074 | if (__rtnl_register(PF_INET6, RTM_NEWROUTE, inet6_rtm_newroute, NULL, NULL) || |
3075 | __rtnl_register(PF_INET6, RTM_DELROUTE, inet6_rtm_delroute, NULL, NULL) || | |
3076 | __rtnl_register(PF_INET6, RTM_GETROUTE, inet6_rtm_getroute, NULL, NULL)) | |
d189634e | 3077 | goto out_register_late_subsys; |
c127ea2c | 3078 | |
8ed67789 | 3079 | ret = register_netdevice_notifier(&ip6_route_dev_notifier); |
cdb18761 | 3080 | if (ret) |
d189634e | 3081 | goto out_register_late_subsys; |
8ed67789 | 3082 | |
433d49c3 DL |
3083 | out: |
3084 | return ret; | |
3085 | ||
d189634e TG |
3086 | out_register_late_subsys: |
3087 | unregister_pernet_subsys(&ip6_route_net_late_ops); | |
433d49c3 | 3088 | fib6_rules_init: |
433d49c3 DL |
3089 | fib6_rules_cleanup(); |
3090 | xfrm6_init: | |
433d49c3 | 3091 | xfrm6_fini(); |
2a0c451a TG |
3092 | out_fib6_init: |
3093 | fib6_gc_cleanup(); | |
8ed67789 DL |
3094 | out_register_subsys: |
3095 | unregister_pernet_subsys(&ip6_route_net_ops); | |
7e52b33b DM |
3096 | out_register_inetpeer: |
3097 | unregister_pernet_subsys(&ipv6_inetpeer_ops); | |
fc66f95c ED |
3098 | out_dst_entries: |
3099 | dst_entries_destroy(&ip6_dst_blackhole_ops); | |
433d49c3 | 3100 | out_kmem_cache: |
f2fc6a54 | 3101 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
433d49c3 | 3102 | goto out; |
1da177e4 LT |
3103 | } |
3104 | ||
3105 | void ip6_route_cleanup(void) | |
3106 | { | |
8ed67789 | 3107 | unregister_netdevice_notifier(&ip6_route_dev_notifier); |
d189634e | 3108 | unregister_pernet_subsys(&ip6_route_net_late_ops); |
101367c2 | 3109 | fib6_rules_cleanup(); |
1da177e4 | 3110 | xfrm6_fini(); |
1da177e4 | 3111 | fib6_gc_cleanup(); |
c3426b47 | 3112 | unregister_pernet_subsys(&ipv6_inetpeer_ops); |
8ed67789 | 3113 | unregister_pernet_subsys(&ip6_route_net_ops); |
41bb78b4 | 3114 | dst_entries_destroy(&ip6_dst_blackhole_ops); |
f2fc6a54 | 3115 | kmem_cache_destroy(ip6_dst_ops_template.kmem_cachep); |
1da177e4 | 3116 | } |