]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * IPv4 Forwarding Information Base: FIB frontend. | |
7 | * | |
8 | * Version: $Id: fib_frontend.c,v 1.26 2001/10/31 21:55:54 davem Exp $ | |
9 | * | |
10 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License | |
14 | * as published by the Free Software Foundation; either version | |
15 | * 2 of the License, or (at your option) any later version. | |
16 | */ | |
17 | ||
1da177e4 LT |
18 | #include <linux/module.h> |
19 | #include <asm/uaccess.h> | |
20 | #include <asm/system.h> | |
21 | #include <linux/bitops.h> | |
4fc268d2 | 22 | #include <linux/capability.h> |
1da177e4 LT |
23 | #include <linux/types.h> |
24 | #include <linux/kernel.h> | |
1da177e4 LT |
25 | #include <linux/mm.h> |
26 | #include <linux/string.h> | |
27 | #include <linux/socket.h> | |
28 | #include <linux/sockios.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/in.h> | |
31 | #include <linux/inet.h> | |
14c85021 | 32 | #include <linux/inetdevice.h> |
1da177e4 | 33 | #include <linux/netdevice.h> |
1823730f | 34 | #include <linux/if_addr.h> |
1da177e4 LT |
35 | #include <linux/if_arp.h> |
36 | #include <linux/skbuff.h> | |
1da177e4 | 37 | #include <linux/init.h> |
1af5a8c4 | 38 | #include <linux/list.h> |
1da177e4 LT |
39 | |
40 | #include <net/ip.h> | |
41 | #include <net/protocol.h> | |
42 | #include <net/route.h> | |
43 | #include <net/tcp.h> | |
44 | #include <net/sock.h> | |
45 | #include <net/icmp.h> | |
46 | #include <net/arp.h> | |
47 | #include <net/ip_fib.h> | |
63f3444f | 48 | #include <net/rtnetlink.h> |
1da177e4 LT |
49 | |
50 | #define FFprint(a...) printk(KERN_DEBUG a) | |
51 | ||
28f7b036 DM |
52 | static struct sock *fibnl; |
53 | ||
1da177e4 LT |
54 | #ifndef CONFIG_IP_MULTIPLE_TABLES |
55 | ||
7b1a74fd | 56 | static int __net_init fib4_rules_init(struct net *net) |
c3e9a353 | 57 | { |
93456b6d DL |
58 | struct fib_table *local_table, *main_table; |
59 | ||
60 | local_table = fib_hash_init(RT_TABLE_LOCAL); | |
61 | if (local_table == NULL) | |
dbb50165 DL |
62 | return -ENOMEM; |
63 | ||
93456b6d DL |
64 | main_table = fib_hash_init(RT_TABLE_MAIN); |
65 | if (main_table == NULL) | |
dbb50165 DL |
66 | goto fail; |
67 | ||
93456b6d | 68 | hlist_add_head_rcu(&local_table->tb_hlist, |
e4aef8ae | 69 | &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]); |
93456b6d | 70 | hlist_add_head_rcu(&main_table->tb_hlist, |
e4aef8ae | 71 | &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]); |
dbb50165 DL |
72 | return 0; |
73 | ||
74 | fail: | |
93456b6d | 75 | kfree(local_table); |
dbb50165 | 76 | return -ENOMEM; |
c3e9a353 | 77 | } |
1af5a8c4 | 78 | #else |
1da177e4 | 79 | |
8ad4942c | 80 | struct fib_table *fib_new_table(struct net *net, u32 id) |
1da177e4 LT |
81 | { |
82 | struct fib_table *tb; | |
1af5a8c4 | 83 | unsigned int h; |
1da177e4 | 84 | |
1af5a8c4 PM |
85 | if (id == 0) |
86 | id = RT_TABLE_MAIN; | |
8ad4942c | 87 | tb = fib_get_table(net, id); |
1af5a8c4 PM |
88 | if (tb) |
89 | return tb; | |
1da177e4 LT |
90 | tb = fib_hash_init(id); |
91 | if (!tb) | |
92 | return NULL; | |
1af5a8c4 | 93 | h = id & (FIB_TABLE_HASHSZ - 1); |
e4aef8ae | 94 | hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]); |
1da177e4 LT |
95 | return tb; |
96 | } | |
97 | ||
8ad4942c | 98 | struct fib_table *fib_get_table(struct net *net, u32 id) |
1af5a8c4 PM |
99 | { |
100 | struct fib_table *tb; | |
101 | struct hlist_node *node; | |
e4aef8ae | 102 | struct hlist_head *head; |
1af5a8c4 | 103 | unsigned int h; |
1da177e4 | 104 | |
1af5a8c4 PM |
105 | if (id == 0) |
106 | id = RT_TABLE_MAIN; | |
107 | h = id & (FIB_TABLE_HASHSZ - 1); | |
e4aef8ae | 108 | |
1af5a8c4 | 109 | rcu_read_lock(); |
e4aef8ae DL |
110 | head = &net->ipv4.fib_table_hash[h]; |
111 | hlist_for_each_entry_rcu(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
112 | if (tb->tb_id == id) { |
113 | rcu_read_unlock(); | |
114 | return tb; | |
115 | } | |
116 | } | |
117 | rcu_read_unlock(); | |
118 | return NULL; | |
119 | } | |
1da177e4 LT |
120 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
121 | ||
e4aef8ae | 122 | static void fib_flush(struct net *net) |
1da177e4 LT |
123 | { |
124 | int flushed = 0; | |
1da177e4 | 125 | struct fib_table *tb; |
1af5a8c4 | 126 | struct hlist_node *node; |
e4aef8ae | 127 | struct hlist_head *head; |
1af5a8c4 | 128 | unsigned int h; |
1da177e4 | 129 | |
1af5a8c4 | 130 | for (h = 0; h < FIB_TABLE_HASHSZ; h++) { |
e4aef8ae DL |
131 | head = &net->ipv4.fib_table_hash[h]; |
132 | hlist_for_each_entry(tb, node, head, tb_hlist) | |
1af5a8c4 | 133 | flushed += tb->tb_flush(tb); |
1da177e4 | 134 | } |
1da177e4 LT |
135 | |
136 | if (flushed) | |
137 | rt_cache_flush(-1); | |
138 | } | |
139 | ||
140 | /* | |
141 | * Find the first device with a given source address. | |
142 | */ | |
143 | ||
60cad5da | 144 | struct net_device * ip_dev_find(__be32 addr) |
1da177e4 LT |
145 | { |
146 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
147 | struct fib_result res; | |
148 | struct net_device *dev = NULL; | |
03cf786c | 149 | struct fib_table *local_table; |
1da177e4 LT |
150 | |
151 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
152 | res.r = NULL; | |
153 | #endif | |
154 | ||
8ad4942c | 155 | local_table = fib_get_table(&init_net, RT_TABLE_LOCAL); |
03cf786c | 156 | if (!local_table || local_table->tb_lookup(local_table, &fl, &res)) |
1da177e4 LT |
157 | return NULL; |
158 | if (res.type != RTN_LOCAL) | |
159 | goto out; | |
160 | dev = FIB_RES_DEV(res); | |
161 | ||
162 | if (dev) | |
163 | dev_hold(dev); | |
164 | out: | |
165 | fib_res_put(&res); | |
166 | return dev; | |
167 | } | |
168 | ||
05538116 LAT |
169 | /* |
170 | * Find address type as if only "dev" was present in the system. If | |
171 | * on_dev is NULL then all interfaces are taken into consideration. | |
172 | */ | |
6b175b26 EB |
173 | static inline unsigned __inet_dev_addr_type(struct net *net, |
174 | const struct net_device *dev, | |
05538116 | 175 | __be32 addr) |
1da177e4 LT |
176 | { |
177 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
178 | struct fib_result res; | |
179 | unsigned ret = RTN_BROADCAST; | |
03cf786c | 180 | struct fib_table *local_table; |
1da177e4 | 181 | |
f97c1e0c | 182 | if (ipv4_is_zeronet(addr) || ipv4_is_badclass(addr)) |
1da177e4 | 183 | return RTN_BROADCAST; |
f97c1e0c | 184 | if (ipv4_is_multicast(addr)) |
1da177e4 LT |
185 | return RTN_MULTICAST; |
186 | ||
187 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
188 | res.r = NULL; | |
189 | #endif | |
e905a9ed | 190 | |
6b175b26 | 191 | local_table = fib_get_table(net, RT_TABLE_LOCAL); |
03cf786c | 192 | if (local_table) { |
1da177e4 | 193 | ret = RTN_UNICAST; |
03cf786c | 194 | if (!local_table->tb_lookup(local_table, &fl, &res)) { |
05538116 LAT |
195 | if (!dev || dev == res.fi->fib_dev) |
196 | ret = res.type; | |
1da177e4 LT |
197 | fib_res_put(&res); |
198 | } | |
199 | } | |
200 | return ret; | |
201 | } | |
202 | ||
6b175b26 | 203 | unsigned int inet_addr_type(struct net *net, __be32 addr) |
05538116 | 204 | { |
6b175b26 | 205 | return __inet_dev_addr_type(net, NULL, addr); |
05538116 LAT |
206 | } |
207 | ||
6b175b26 EB |
208 | unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev, |
209 | __be32 addr) | |
05538116 | 210 | { |
6b175b26 | 211 | return __inet_dev_addr_type(net, dev, addr); |
05538116 LAT |
212 | } |
213 | ||
1da177e4 LT |
214 | /* Given (packet source, input interface) and optional (dst, oif, tos): |
215 | - (main) check, that source is valid i.e. not broadcast or our local | |
216 | address. | |
217 | - figure out what "logical" interface this packet arrived | |
218 | and calculate "specific destination" address. | |
219 | - check, that packet arrived from expected physical interface. | |
220 | */ | |
221 | ||
d9c9df8c AV |
222 | int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif, |
223 | struct net_device *dev, __be32 *spec_dst, u32 *itag) | |
1da177e4 LT |
224 | { |
225 | struct in_device *in_dev; | |
226 | struct flowi fl = { .nl_u = { .ip4_u = | |
227 | { .daddr = src, | |
228 | .saddr = dst, | |
229 | .tos = tos } }, | |
230 | .iif = oif }; | |
231 | struct fib_result res; | |
232 | int no_addr, rpf; | |
233 | int ret; | |
234 | ||
235 | no_addr = rpf = 0; | |
236 | rcu_read_lock(); | |
e5ed6399 | 237 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
238 | if (in_dev) { |
239 | no_addr = in_dev->ifa_list == NULL; | |
240 | rpf = IN_DEV_RPFILTER(in_dev); | |
241 | } | |
242 | rcu_read_unlock(); | |
243 | ||
244 | if (in_dev == NULL) | |
245 | goto e_inval; | |
246 | ||
247 | if (fib_lookup(&fl, &res)) | |
248 | goto last_resort; | |
249 | if (res.type != RTN_UNICAST) | |
250 | goto e_inval_res; | |
251 | *spec_dst = FIB_RES_PREFSRC(res); | |
252 | fib_combine_itag(itag, &res); | |
253 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
254 | if (FIB_RES_DEV(res) == dev || res.fi->fib_nhs > 1) | |
255 | #else | |
256 | if (FIB_RES_DEV(res) == dev) | |
257 | #endif | |
258 | { | |
259 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
260 | fib_res_put(&res); | |
261 | return ret; | |
262 | } | |
263 | fib_res_put(&res); | |
264 | if (no_addr) | |
265 | goto last_resort; | |
266 | if (rpf) | |
267 | goto e_inval; | |
268 | fl.oif = dev->ifindex; | |
269 | ||
270 | ret = 0; | |
271 | if (fib_lookup(&fl, &res) == 0) { | |
272 | if (res.type == RTN_UNICAST) { | |
273 | *spec_dst = FIB_RES_PREFSRC(res); | |
274 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
275 | } | |
276 | fib_res_put(&res); | |
277 | } | |
278 | return ret; | |
279 | ||
280 | last_resort: | |
281 | if (rpf) | |
282 | goto e_inval; | |
283 | *spec_dst = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE); | |
284 | *itag = 0; | |
285 | return 0; | |
286 | ||
287 | e_inval_res: | |
288 | fib_res_put(&res); | |
289 | e_inval: | |
290 | return -EINVAL; | |
291 | } | |
292 | ||
81f7bf6c | 293 | static inline __be32 sk_extract_addr(struct sockaddr *addr) |
4e902c57 TG |
294 | { |
295 | return ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
296 | } | |
297 | ||
298 | static int put_rtax(struct nlattr *mx, int len, int type, u32 value) | |
299 | { | |
300 | struct nlattr *nla; | |
301 | ||
302 | nla = (struct nlattr *) ((char *) mx + len); | |
303 | nla->nla_type = type; | |
304 | nla->nla_len = nla_attr_size(4); | |
305 | *(u32 *) nla_data(nla) = value; | |
306 | ||
307 | return len + nla_total_size(4); | |
308 | } | |
309 | ||
310 | static int rtentry_to_fib_config(int cmd, struct rtentry *rt, | |
311 | struct fib_config *cfg) | |
312 | { | |
6d85c10a | 313 | __be32 addr; |
4e902c57 TG |
314 | int plen; |
315 | ||
316 | memset(cfg, 0, sizeof(*cfg)); | |
4d1169c1 | 317 | cfg->fc_nlinfo.nl_net = &init_net; |
4e902c57 TG |
318 | |
319 | if (rt->rt_dst.sa_family != AF_INET) | |
320 | return -EAFNOSUPPORT; | |
321 | ||
322 | /* | |
323 | * Check mask for validity: | |
324 | * a) it must be contiguous. | |
325 | * b) destination must have all host bits clear. | |
326 | * c) if application forgot to set correct family (AF_INET), | |
327 | * reject request unless it is absolutely clear i.e. | |
328 | * both family and mask are zero. | |
329 | */ | |
330 | plen = 32; | |
331 | addr = sk_extract_addr(&rt->rt_dst); | |
332 | if (!(rt->rt_flags & RTF_HOST)) { | |
81f7bf6c | 333 | __be32 mask = sk_extract_addr(&rt->rt_genmask); |
4e902c57 TG |
334 | |
335 | if (rt->rt_genmask.sa_family != AF_INET) { | |
336 | if (mask || rt->rt_genmask.sa_family) | |
337 | return -EAFNOSUPPORT; | |
338 | } | |
339 | ||
340 | if (bad_mask(mask, addr)) | |
341 | return -EINVAL; | |
342 | ||
343 | plen = inet_mask_len(mask); | |
344 | } | |
345 | ||
346 | cfg->fc_dst_len = plen; | |
347 | cfg->fc_dst = addr; | |
348 | ||
349 | if (cmd != SIOCDELRT) { | |
350 | cfg->fc_nlflags = NLM_F_CREATE; | |
351 | cfg->fc_protocol = RTPROT_BOOT; | |
352 | } | |
353 | ||
354 | if (rt->rt_metric) | |
355 | cfg->fc_priority = rt->rt_metric - 1; | |
356 | ||
357 | if (rt->rt_flags & RTF_REJECT) { | |
358 | cfg->fc_scope = RT_SCOPE_HOST; | |
359 | cfg->fc_type = RTN_UNREACHABLE; | |
360 | return 0; | |
361 | } | |
362 | ||
363 | cfg->fc_scope = RT_SCOPE_NOWHERE; | |
364 | cfg->fc_type = RTN_UNICAST; | |
365 | ||
366 | if (rt->rt_dev) { | |
367 | char *colon; | |
368 | struct net_device *dev; | |
369 | char devname[IFNAMSIZ]; | |
370 | ||
371 | if (copy_from_user(devname, rt->rt_dev, IFNAMSIZ-1)) | |
372 | return -EFAULT; | |
373 | ||
374 | devname[IFNAMSIZ-1] = 0; | |
375 | colon = strchr(devname, ':'); | |
376 | if (colon) | |
377 | *colon = 0; | |
881d966b | 378 | dev = __dev_get_by_name(&init_net, devname); |
4e902c57 TG |
379 | if (!dev) |
380 | return -ENODEV; | |
381 | cfg->fc_oif = dev->ifindex; | |
382 | if (colon) { | |
383 | struct in_ifaddr *ifa; | |
384 | struct in_device *in_dev = __in_dev_get_rtnl(dev); | |
385 | if (!in_dev) | |
386 | return -ENODEV; | |
387 | *colon = ':'; | |
388 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) | |
389 | if (strcmp(ifa->ifa_label, devname) == 0) | |
390 | break; | |
391 | if (ifa == NULL) | |
392 | return -ENODEV; | |
393 | cfg->fc_prefsrc = ifa->ifa_local; | |
394 | } | |
395 | } | |
396 | ||
397 | addr = sk_extract_addr(&rt->rt_gateway); | |
398 | if (rt->rt_gateway.sa_family == AF_INET && addr) { | |
399 | cfg->fc_gw = addr; | |
400 | if (rt->rt_flags & RTF_GATEWAY && | |
6b175b26 | 401 | inet_addr_type(&init_net, addr) == RTN_UNICAST) |
4e902c57 TG |
402 | cfg->fc_scope = RT_SCOPE_UNIVERSE; |
403 | } | |
404 | ||
405 | if (cmd == SIOCDELRT) | |
406 | return 0; | |
407 | ||
408 | if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw) | |
409 | return -EINVAL; | |
410 | ||
411 | if (cfg->fc_scope == RT_SCOPE_NOWHERE) | |
412 | cfg->fc_scope = RT_SCOPE_LINK; | |
413 | ||
414 | if (rt->rt_flags & (RTF_MTU | RTF_WINDOW | RTF_IRTT)) { | |
415 | struct nlattr *mx; | |
416 | int len = 0; | |
417 | ||
418 | mx = kzalloc(3 * nla_total_size(4), GFP_KERNEL); | |
e905a9ed | 419 | if (mx == NULL) |
4e902c57 TG |
420 | return -ENOMEM; |
421 | ||
422 | if (rt->rt_flags & RTF_MTU) | |
423 | len = put_rtax(mx, len, RTAX_ADVMSS, rt->rt_mtu - 40); | |
424 | ||
425 | if (rt->rt_flags & RTF_WINDOW) | |
426 | len = put_rtax(mx, len, RTAX_WINDOW, rt->rt_window); | |
427 | ||
428 | if (rt->rt_flags & RTF_IRTT) | |
429 | len = put_rtax(mx, len, RTAX_RTT, rt->rt_irtt << 3); | |
430 | ||
431 | cfg->fc_mx = mx; | |
432 | cfg->fc_mx_len = len; | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
1da177e4 LT |
438 | /* |
439 | * Handle IP routing ioctl calls. These are used to manipulate the routing tables | |
440 | */ | |
e905a9ed | 441 | |
1da177e4 LT |
442 | int ip_rt_ioctl(unsigned int cmd, void __user *arg) |
443 | { | |
4e902c57 TG |
444 | struct fib_config cfg; |
445 | struct rtentry rt; | |
1da177e4 | 446 | int err; |
1da177e4 LT |
447 | |
448 | switch (cmd) { | |
449 | case SIOCADDRT: /* Add a route */ | |
450 | case SIOCDELRT: /* Delete a route */ | |
451 | if (!capable(CAP_NET_ADMIN)) | |
452 | return -EPERM; | |
4e902c57 TG |
453 | |
454 | if (copy_from_user(&rt, arg, sizeof(rt))) | |
1da177e4 | 455 | return -EFAULT; |
4e902c57 | 456 | |
1da177e4 | 457 | rtnl_lock(); |
4e902c57 | 458 | err = rtentry_to_fib_config(cmd, &rt, &cfg); |
1da177e4 | 459 | if (err == 0) { |
4e902c57 TG |
460 | struct fib_table *tb; |
461 | ||
1da177e4 | 462 | if (cmd == SIOCDELRT) { |
8ad4942c | 463 | tb = fib_get_table(&init_net, cfg.fc_table); |
1da177e4 | 464 | if (tb) |
4e902c57 TG |
465 | err = tb->tb_delete(tb, &cfg); |
466 | else | |
467 | err = -ESRCH; | |
1da177e4 | 468 | } else { |
8ad4942c | 469 | tb = fib_new_table(&init_net, cfg.fc_table); |
1da177e4 | 470 | if (tb) |
4e902c57 TG |
471 | err = tb->tb_insert(tb, &cfg); |
472 | else | |
473 | err = -ENOBUFS; | |
1da177e4 | 474 | } |
4e902c57 TG |
475 | |
476 | /* allocated by rtentry_to_fib_config() */ | |
477 | kfree(cfg.fc_mx); | |
1da177e4 LT |
478 | } |
479 | rtnl_unlock(); | |
480 | return err; | |
481 | } | |
482 | return -EINVAL; | |
483 | } | |
484 | ||
ef7c79ed | 485 | const struct nla_policy rtm_ipv4_policy[RTA_MAX+1] = { |
4e902c57 TG |
486 | [RTA_DST] = { .type = NLA_U32 }, |
487 | [RTA_SRC] = { .type = NLA_U32 }, | |
488 | [RTA_IIF] = { .type = NLA_U32 }, | |
489 | [RTA_OIF] = { .type = NLA_U32 }, | |
490 | [RTA_GATEWAY] = { .type = NLA_U32 }, | |
491 | [RTA_PRIORITY] = { .type = NLA_U32 }, | |
492 | [RTA_PREFSRC] = { .type = NLA_U32 }, | |
493 | [RTA_METRICS] = { .type = NLA_NESTED }, | |
5176f91e | 494 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
4e902c57 TG |
495 | [RTA_PROTOINFO] = { .type = NLA_U32 }, |
496 | [RTA_FLOW] = { .type = NLA_U32 }, | |
4e902c57 TG |
497 | }; |
498 | ||
499 | static int rtm_to_fib_config(struct sk_buff *skb, struct nlmsghdr *nlh, | |
500 | struct fib_config *cfg) | |
1da177e4 | 501 | { |
4e902c57 TG |
502 | struct nlattr *attr; |
503 | int err, remaining; | |
504 | struct rtmsg *rtm; | |
505 | ||
506 | err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy); | |
507 | if (err < 0) | |
508 | goto errout; | |
509 | ||
510 | memset(cfg, 0, sizeof(*cfg)); | |
511 | ||
512 | rtm = nlmsg_data(nlh); | |
4e902c57 | 513 | cfg->fc_dst_len = rtm->rtm_dst_len; |
4e902c57 TG |
514 | cfg->fc_tos = rtm->rtm_tos; |
515 | cfg->fc_table = rtm->rtm_table; | |
516 | cfg->fc_protocol = rtm->rtm_protocol; | |
517 | cfg->fc_scope = rtm->rtm_scope; | |
518 | cfg->fc_type = rtm->rtm_type; | |
519 | cfg->fc_flags = rtm->rtm_flags; | |
520 | cfg->fc_nlflags = nlh->nlmsg_flags; | |
521 | ||
522 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; | |
523 | cfg->fc_nlinfo.nlh = nlh; | |
4d1169c1 | 524 | cfg->fc_nlinfo.nl_net = &init_net; |
4e902c57 | 525 | |
a0ee18b9 TG |
526 | if (cfg->fc_type > RTN_MAX) { |
527 | err = -EINVAL; | |
528 | goto errout; | |
529 | } | |
530 | ||
4e902c57 | 531 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) { |
8f4c1f9b | 532 | switch (nla_type(attr)) { |
4e902c57 | 533 | case RTA_DST: |
17fb2c64 | 534 | cfg->fc_dst = nla_get_be32(attr); |
4e902c57 | 535 | break; |
4e902c57 TG |
536 | case RTA_OIF: |
537 | cfg->fc_oif = nla_get_u32(attr); | |
538 | break; | |
539 | case RTA_GATEWAY: | |
17fb2c64 | 540 | cfg->fc_gw = nla_get_be32(attr); |
4e902c57 TG |
541 | break; |
542 | case RTA_PRIORITY: | |
543 | cfg->fc_priority = nla_get_u32(attr); | |
544 | break; | |
545 | case RTA_PREFSRC: | |
17fb2c64 | 546 | cfg->fc_prefsrc = nla_get_be32(attr); |
4e902c57 TG |
547 | break; |
548 | case RTA_METRICS: | |
549 | cfg->fc_mx = nla_data(attr); | |
550 | cfg->fc_mx_len = nla_len(attr); | |
551 | break; | |
552 | case RTA_MULTIPATH: | |
553 | cfg->fc_mp = nla_data(attr); | |
554 | cfg->fc_mp_len = nla_len(attr); | |
555 | break; | |
556 | case RTA_FLOW: | |
557 | cfg->fc_flow = nla_get_u32(attr); | |
558 | break; | |
4e902c57 TG |
559 | case RTA_TABLE: |
560 | cfg->fc_table = nla_get_u32(attr); | |
561 | break; | |
1da177e4 LT |
562 | } |
563 | } | |
4e902c57 | 564 | |
1da177e4 | 565 | return 0; |
4e902c57 TG |
566 | errout: |
567 | return err; | |
1da177e4 LT |
568 | } |
569 | ||
63f3444f | 570 | static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 571 | { |
b854272b | 572 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
573 | struct fib_config cfg; |
574 | struct fib_table *tb; | |
575 | int err; | |
1da177e4 | 576 | |
b854272b DL |
577 | if (net != &init_net) |
578 | return -EINVAL; | |
579 | ||
4e902c57 TG |
580 | err = rtm_to_fib_config(skb, nlh, &cfg); |
581 | if (err < 0) | |
582 | goto errout; | |
1da177e4 | 583 | |
8ad4942c | 584 | tb = fib_get_table(net, cfg.fc_table); |
4e902c57 TG |
585 | if (tb == NULL) { |
586 | err = -ESRCH; | |
587 | goto errout; | |
588 | } | |
589 | ||
590 | err = tb->tb_delete(tb, &cfg); | |
591 | errout: | |
592 | return err; | |
1da177e4 LT |
593 | } |
594 | ||
63f3444f | 595 | static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 596 | { |
b854272b | 597 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
598 | struct fib_config cfg; |
599 | struct fib_table *tb; | |
600 | int err; | |
1da177e4 | 601 | |
b854272b DL |
602 | if (net != &init_net) |
603 | return -EINVAL; | |
604 | ||
4e902c57 TG |
605 | err = rtm_to_fib_config(skb, nlh, &cfg); |
606 | if (err < 0) | |
607 | goto errout; | |
1da177e4 | 608 | |
8ad4942c | 609 | tb = fib_new_table(&init_net, cfg.fc_table); |
4e902c57 TG |
610 | if (tb == NULL) { |
611 | err = -ENOBUFS; | |
612 | goto errout; | |
613 | } | |
614 | ||
615 | err = tb->tb_insert(tb, &cfg); | |
616 | errout: | |
617 | return err; | |
1da177e4 LT |
618 | } |
619 | ||
63f3444f | 620 | static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 621 | { |
b854272b | 622 | struct net *net = skb->sk->sk_net; |
1af5a8c4 PM |
623 | unsigned int h, s_h; |
624 | unsigned int e = 0, s_e; | |
1da177e4 | 625 | struct fib_table *tb; |
1af5a8c4 | 626 | struct hlist_node *node; |
e4aef8ae | 627 | struct hlist_head *head; |
1af5a8c4 | 628 | int dumped = 0; |
1da177e4 | 629 | |
b854272b DL |
630 | if (net != &init_net) |
631 | return 0; | |
632 | ||
be403ea1 TG |
633 | if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) && |
634 | ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED) | |
1da177e4 LT |
635 | return ip_rt_dump(skb, cb); |
636 | ||
1af5a8c4 PM |
637 | s_h = cb->args[0]; |
638 | s_e = cb->args[1]; | |
639 | ||
640 | for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) { | |
641 | e = 0; | |
e4aef8ae DL |
642 | head = &net->ipv4.fib_table_hash[h]; |
643 | hlist_for_each_entry(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
644 | if (e < s_e) |
645 | goto next; | |
646 | if (dumped) | |
647 | memset(&cb->args[2], 0, sizeof(cb->args) - | |
e905a9ed | 648 | 2 * sizeof(cb->args[0])); |
1af5a8c4 PM |
649 | if (tb->tb_dump(tb, skb, cb) < 0) |
650 | goto out; | |
651 | dumped = 1; | |
652 | next: | |
653 | e++; | |
654 | } | |
1da177e4 | 655 | } |
1af5a8c4 PM |
656 | out: |
657 | cb->args[1] = e; | |
658 | cb->args[0] = h; | |
1da177e4 LT |
659 | |
660 | return skb->len; | |
661 | } | |
662 | ||
663 | /* Prepare and feed intra-kernel routing request. | |
664 | Really, it should be netlink message, but :-( netlink | |
665 | can be not configured, so that we feed it directly | |
666 | to fib engine. It is legal, because all events occur | |
667 | only when netlink is already locked. | |
668 | */ | |
669 | ||
81f7bf6c | 670 | static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa) |
1da177e4 | 671 | { |
4e902c57 TG |
672 | struct fib_table *tb; |
673 | struct fib_config cfg = { | |
674 | .fc_protocol = RTPROT_KERNEL, | |
675 | .fc_type = type, | |
676 | .fc_dst = dst, | |
677 | .fc_dst_len = dst_len, | |
678 | .fc_prefsrc = ifa->ifa_local, | |
679 | .fc_oif = ifa->ifa_dev->dev->ifindex, | |
680 | .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND, | |
4d1169c1 DL |
681 | .fc_nlinfo = { |
682 | .nl_net = &init_net, | |
683 | }, | |
4e902c57 | 684 | }; |
1da177e4 LT |
685 | |
686 | if (type == RTN_UNICAST) | |
8ad4942c | 687 | tb = fib_new_table(&init_net, RT_TABLE_MAIN); |
1da177e4 | 688 | else |
8ad4942c | 689 | tb = fib_new_table(&init_net, RT_TABLE_LOCAL); |
1da177e4 LT |
690 | |
691 | if (tb == NULL) | |
692 | return; | |
693 | ||
4e902c57 | 694 | cfg.fc_table = tb->tb_id; |
1da177e4 | 695 | |
4e902c57 TG |
696 | if (type != RTN_LOCAL) |
697 | cfg.fc_scope = RT_SCOPE_LINK; | |
698 | else | |
699 | cfg.fc_scope = RT_SCOPE_HOST; | |
1da177e4 LT |
700 | |
701 | if (cmd == RTM_NEWROUTE) | |
4e902c57 | 702 | tb->tb_insert(tb, &cfg); |
1da177e4 | 703 | else |
4e902c57 | 704 | tb->tb_delete(tb, &cfg); |
1da177e4 LT |
705 | } |
706 | ||
0ff60a45 | 707 | void fib_add_ifaddr(struct in_ifaddr *ifa) |
1da177e4 LT |
708 | { |
709 | struct in_device *in_dev = ifa->ifa_dev; | |
710 | struct net_device *dev = in_dev->dev; | |
711 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
712 | __be32 mask = ifa->ifa_mask; |
713 | __be32 addr = ifa->ifa_local; | |
714 | __be32 prefix = ifa->ifa_address&mask; | |
1da177e4 LT |
715 | |
716 | if (ifa->ifa_flags&IFA_F_SECONDARY) { | |
717 | prim = inet_ifa_byprefix(in_dev, prefix, mask); | |
718 | if (prim == NULL) { | |
719 | printk(KERN_DEBUG "fib_add_ifaddr: bug: prim == NULL\n"); | |
720 | return; | |
721 | } | |
722 | } | |
723 | ||
724 | fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim); | |
725 | ||
726 | if (!(dev->flags&IFF_UP)) | |
727 | return; | |
728 | ||
729 | /* Add broadcast address, if it is explicitly assigned. */ | |
a144ea4b | 730 | if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF)) |
1da177e4 LT |
731 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); |
732 | ||
f97c1e0c | 733 | if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) && |
1da177e4 LT |
734 | (prefix != addr || ifa->ifa_prefixlen < 32)) { |
735 | fib_magic(RTM_NEWROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
736 | RTN_UNICAST, prefix, ifa->ifa_prefixlen, prim); | |
737 | ||
738 | /* Add network specific broadcasts, when it takes a sense */ | |
739 | if (ifa->ifa_prefixlen < 31) { | |
740 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim); | |
741 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix|~mask, 32, prim); | |
742 | } | |
743 | } | |
744 | } | |
745 | ||
746 | static void fib_del_ifaddr(struct in_ifaddr *ifa) | |
747 | { | |
748 | struct in_device *in_dev = ifa->ifa_dev; | |
749 | struct net_device *dev = in_dev->dev; | |
750 | struct in_ifaddr *ifa1; | |
751 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
752 | __be32 brd = ifa->ifa_address|~ifa->ifa_mask; |
753 | __be32 any = ifa->ifa_address&ifa->ifa_mask; | |
1da177e4 LT |
754 | #define LOCAL_OK 1 |
755 | #define BRD_OK 2 | |
756 | #define BRD0_OK 4 | |
757 | #define BRD1_OK 8 | |
758 | unsigned ok = 0; | |
759 | ||
760 | if (!(ifa->ifa_flags&IFA_F_SECONDARY)) | |
761 | fib_magic(RTM_DELROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
762 | RTN_UNICAST, any, ifa->ifa_prefixlen, prim); | |
763 | else { | |
764 | prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask); | |
765 | if (prim == NULL) { | |
766 | printk(KERN_DEBUG "fib_del_ifaddr: bug: prim == NULL\n"); | |
767 | return; | |
768 | } | |
769 | } | |
770 | ||
771 | /* Deletion is more complicated than add. | |
772 | We should take care of not to delete too much :-) | |
773 | ||
774 | Scan address list to be sure that addresses are really gone. | |
775 | */ | |
776 | ||
777 | for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { | |
778 | if (ifa->ifa_local == ifa1->ifa_local) | |
779 | ok |= LOCAL_OK; | |
780 | if (ifa->ifa_broadcast == ifa1->ifa_broadcast) | |
781 | ok |= BRD_OK; | |
782 | if (brd == ifa1->ifa_broadcast) | |
783 | ok |= BRD1_OK; | |
784 | if (any == ifa1->ifa_broadcast) | |
785 | ok |= BRD0_OK; | |
786 | } | |
787 | ||
788 | if (!(ok&BRD_OK)) | |
789 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); | |
790 | if (!(ok&BRD1_OK)) | |
791 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim); | |
792 | if (!(ok&BRD0_OK)) | |
793 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim); | |
794 | if (!(ok&LOCAL_OK)) { | |
795 | fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim); | |
796 | ||
797 | /* Check, that this local address finally disappeared. */ | |
6b175b26 | 798 | if (inet_addr_type(&init_net, ifa->ifa_local) != RTN_LOCAL) { |
1da177e4 LT |
799 | /* And the last, but not the least thing. |
800 | We must flush stray FIB entries. | |
801 | ||
802 | First of all, we scan fib_info list searching | |
803 | for stray nexthop entries, then ignite fib_flush. | |
804 | */ | |
805 | if (fib_sync_down(ifa->ifa_local, NULL, 0)) | |
e4aef8ae | 806 | fib_flush(&init_net); |
1da177e4 LT |
807 | } |
808 | } | |
809 | #undef LOCAL_OK | |
810 | #undef BRD_OK | |
811 | #undef BRD0_OK | |
812 | #undef BRD1_OK | |
813 | } | |
814 | ||
246955fe RO |
815 | static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb ) |
816 | { | |
e905a9ed | 817 | |
246955fe | 818 | struct fib_result res; |
5f300893 | 819 | struct flowi fl = { .mark = frn->fl_mark, |
47dcf0cb | 820 | .nl_u = { .ip4_u = { .daddr = frn->fl_addr, |
246955fe RO |
821 | .tos = frn->fl_tos, |
822 | .scope = frn->fl_scope } } }; | |
1194ed0a | 823 | |
912a41a4 SV |
824 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
825 | res.r = NULL; | |
826 | #endif | |
827 | ||
1194ed0a | 828 | frn->err = -ENOENT; |
246955fe RO |
829 | if (tb) { |
830 | local_bh_disable(); | |
831 | ||
832 | frn->tb_id = tb->tb_id; | |
833 | frn->err = tb->tb_lookup(tb, &fl, &res); | |
834 | ||
835 | if (!frn->err) { | |
836 | frn->prefixlen = res.prefixlen; | |
837 | frn->nh_sel = res.nh_sel; | |
838 | frn->type = res.type; | |
839 | frn->scope = res.scope; | |
1194ed0a | 840 | fib_res_put(&res); |
246955fe RO |
841 | } |
842 | local_bh_enable(); | |
843 | } | |
844 | } | |
845 | ||
28f7b036 | 846 | static void nl_fib_input(struct sk_buff *skb) |
246955fe | 847 | { |
246955fe | 848 | struct fib_result_nl *frn; |
28f7b036 | 849 | struct nlmsghdr *nlh; |
246955fe | 850 | struct fib_table *tb; |
28f7b036 | 851 | u32 pid; |
1194ed0a | 852 | |
b529ccf2 | 853 | nlh = nlmsg_hdr(skb); |
ea86575e | 854 | if (skb->len < NLMSG_SPACE(0) || skb->len < nlh->nlmsg_len || |
d883a036 | 855 | nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*frn))) |
ea86575e | 856 | return; |
d883a036 DL |
857 | |
858 | skb = skb_clone(skb, GFP_KERNEL); | |
859 | if (skb == NULL) | |
860 | return; | |
861 | nlh = nlmsg_hdr(skb); | |
e905a9ed | 862 | |
246955fe | 863 | frn = (struct fib_result_nl *) NLMSG_DATA(nlh); |
8ad4942c | 864 | tb = fib_get_table(&init_net, frn->tb_id_in); |
246955fe RO |
865 | |
866 | nl_fib_lookup(frn, tb); | |
e905a9ed | 867 | |
1194ed0a | 868 | pid = NETLINK_CB(skb).pid; /* pid of sending process */ |
246955fe | 869 | NETLINK_CB(skb).pid = 0; /* from kernel */ |
ac6d439d | 870 | NETLINK_CB(skb).dst_group = 0; /* unicast */ |
cd40b7d3 | 871 | netlink_unicast(fibnl, skb, pid, MSG_DONTWAIT); |
e905a9ed | 872 | } |
246955fe | 873 | |
7b1a74fd | 874 | static int nl_fib_lookup_init(struct net *net) |
246955fe | 875 | { |
7b1a74fd | 876 | fibnl = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0, |
cd40b7d3 | 877 | nl_fib_input, NULL, THIS_MODULE); |
7b1a74fd DL |
878 | if (fibnl == NULL) |
879 | return -EAFNOSUPPORT; | |
880 | return 0; | |
881 | } | |
882 | ||
883 | static void nl_fib_lookup_exit(struct net *net) | |
884 | { | |
885 | sock_put(fibnl); | |
246955fe RO |
886 | } |
887 | ||
1da177e4 LT |
888 | static void fib_disable_ip(struct net_device *dev, int force) |
889 | { | |
890 | if (fib_sync_down(0, dev, force)) | |
e4aef8ae | 891 | fib_flush(&init_net); |
1da177e4 LT |
892 | rt_cache_flush(0); |
893 | arp_ifdown(dev); | |
894 | } | |
895 | ||
896 | static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
897 | { | |
898 | struct in_ifaddr *ifa = (struct in_ifaddr*)ptr; | |
899 | ||
900 | switch (event) { | |
901 | case NETDEV_UP: | |
902 | fib_add_ifaddr(ifa); | |
903 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
904 | fib_sync_up(ifa->ifa_dev->dev); | |
905 | #endif | |
906 | rt_cache_flush(-1); | |
907 | break; | |
908 | case NETDEV_DOWN: | |
909 | fib_del_ifaddr(ifa); | |
9fcc2e8a | 910 | if (ifa->ifa_dev->ifa_list == NULL) { |
1da177e4 LT |
911 | /* Last address was deleted from this interface. |
912 | Disable IP. | |
913 | */ | |
914 | fib_disable_ip(ifa->ifa_dev->dev, 1); | |
915 | } else { | |
916 | rt_cache_flush(-1); | |
917 | } | |
918 | break; | |
919 | } | |
920 | return NOTIFY_DONE; | |
921 | } | |
922 | ||
923 | static int fib_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
924 | { | |
925 | struct net_device *dev = ptr; | |
e5ed6399 | 926 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 927 | |
e9dc8653 EB |
928 | if (dev->nd_net != &init_net) |
929 | return NOTIFY_DONE; | |
930 | ||
1da177e4 LT |
931 | if (event == NETDEV_UNREGISTER) { |
932 | fib_disable_ip(dev, 2); | |
933 | return NOTIFY_DONE; | |
934 | } | |
935 | ||
936 | if (!in_dev) | |
937 | return NOTIFY_DONE; | |
938 | ||
939 | switch (event) { | |
940 | case NETDEV_UP: | |
941 | for_ifa(in_dev) { | |
942 | fib_add_ifaddr(ifa); | |
943 | } endfor_ifa(in_dev); | |
944 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
945 | fib_sync_up(dev); | |
946 | #endif | |
947 | rt_cache_flush(-1); | |
948 | break; | |
949 | case NETDEV_DOWN: | |
950 | fib_disable_ip(dev, 0); | |
951 | break; | |
952 | case NETDEV_CHANGEMTU: | |
953 | case NETDEV_CHANGE: | |
954 | rt_cache_flush(0); | |
955 | break; | |
956 | } | |
957 | return NOTIFY_DONE; | |
958 | } | |
959 | ||
960 | static struct notifier_block fib_inetaddr_notifier = { | |
961 | .notifier_call =fib_inetaddr_event, | |
962 | }; | |
963 | ||
964 | static struct notifier_block fib_netdev_notifier = { | |
965 | .notifier_call =fib_netdev_event, | |
966 | }; | |
967 | ||
7b1a74fd | 968 | static int __net_init ip_fib_net_init(struct net *net) |
1da177e4 | 969 | { |
1af5a8c4 PM |
970 | unsigned int i; |
971 | ||
e4aef8ae DL |
972 | net->ipv4.fib_table_hash = kzalloc( |
973 | sizeof(struct hlist_head)*FIB_TABLE_HASHSZ, GFP_KERNEL); | |
974 | if (net->ipv4.fib_table_hash == NULL) | |
975 | return -ENOMEM; | |
976 | ||
1af5a8c4 | 977 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) |
e4aef8ae | 978 | INIT_HLIST_HEAD(&net->ipv4.fib_table_hash[i]); |
c3e9a353 | 979 | |
7b1a74fd DL |
980 | return fib4_rules_init(net); |
981 | } | |
1da177e4 | 982 | |
7b1a74fd DL |
983 | static void __net_exit ip_fib_net_exit(struct net *net) |
984 | { | |
985 | unsigned int i; | |
986 | ||
987 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
988 | fib4_rules_exit(net); | |
989 | #endif | |
990 | ||
991 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) { | |
992 | struct fib_table *tb; | |
993 | struct hlist_head *head; | |
994 | struct hlist_node *node, *tmp; | |
63f3444f | 995 | |
e4aef8ae | 996 | head = &net->ipv4.fib_table_hash[i]; |
7b1a74fd DL |
997 | hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) { |
998 | hlist_del(node); | |
999 | tb->tb_flush(tb); | |
1000 | kfree(tb); | |
1001 | } | |
1002 | } | |
e4aef8ae | 1003 | kfree(net->ipv4.fib_table_hash); |
7b1a74fd DL |
1004 | } |
1005 | ||
1006 | static int __net_init fib_net_init(struct net *net) | |
1007 | { | |
1008 | int error; | |
1009 | ||
1010 | error = 0; | |
1011 | if (net != &init_net) | |
1012 | goto out; | |
1013 | ||
1014 | error = ip_fib_net_init(net); | |
1015 | if (error < 0) | |
1016 | goto out; | |
1017 | error = nl_fib_lookup_init(net); | |
1018 | if (error < 0) | |
1019 | goto out_nlfl; | |
1020 | error = fib_proc_init(net); | |
1021 | if (error < 0) | |
1022 | goto out_proc; | |
1023 | out: | |
1024 | return error; | |
1025 | ||
1026 | out_proc: | |
1027 | nl_fib_lookup_exit(net); | |
1028 | out_nlfl: | |
1029 | ip_fib_net_exit(net); | |
1030 | goto out; | |
1031 | } | |
1032 | ||
1033 | static void __net_exit fib_net_exit(struct net *net) | |
1034 | { | |
1035 | fib_proc_exit(net); | |
1036 | nl_fib_lookup_exit(net); | |
1037 | ip_fib_net_exit(net); | |
1038 | } | |
1039 | ||
1040 | static struct pernet_operations fib_net_ops = { | |
1041 | .init = fib_net_init, | |
1042 | .exit = fib_net_exit, | |
1043 | }; | |
1044 | ||
1045 | void __init ip_fib_init(void) | |
1046 | { | |
63f3444f TG |
1047 | rtnl_register(PF_INET, RTM_NEWROUTE, inet_rtm_newroute, NULL); |
1048 | rtnl_register(PF_INET, RTM_DELROUTE, inet_rtm_delroute, NULL); | |
1049 | rtnl_register(PF_INET, RTM_GETROUTE, NULL, inet_dump_fib); | |
7b1a74fd DL |
1050 | |
1051 | register_pernet_subsys(&fib_net_ops); | |
1052 | register_netdevice_notifier(&fib_netdev_notifier); | |
1053 | register_inetaddr_notifier(&fib_inetaddr_notifier); | |
1da177e4 LT |
1054 | } |
1055 | ||
1056 | EXPORT_SYMBOL(inet_addr_type); | |
05538116 | 1057 | EXPORT_SYMBOL(inet_dev_addr_type); |
a1e8733e | 1058 | EXPORT_SYMBOL(ip_dev_find); |