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 | ||
52 | #ifndef CONFIG_IP_MULTIPLE_TABLES | |
53 | ||
7b1a74fd | 54 | static int __net_init fib4_rules_init(struct net *net) |
c3e9a353 | 55 | { |
93456b6d DL |
56 | struct fib_table *local_table, *main_table; |
57 | ||
58 | local_table = fib_hash_init(RT_TABLE_LOCAL); | |
59 | if (local_table == NULL) | |
dbb50165 DL |
60 | return -ENOMEM; |
61 | ||
93456b6d DL |
62 | main_table = fib_hash_init(RT_TABLE_MAIN); |
63 | if (main_table == NULL) | |
dbb50165 DL |
64 | goto fail; |
65 | ||
93456b6d | 66 | hlist_add_head_rcu(&local_table->tb_hlist, |
e4aef8ae | 67 | &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]); |
93456b6d | 68 | hlist_add_head_rcu(&main_table->tb_hlist, |
e4aef8ae | 69 | &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]); |
dbb50165 DL |
70 | return 0; |
71 | ||
72 | fail: | |
93456b6d | 73 | kfree(local_table); |
dbb50165 | 74 | return -ENOMEM; |
c3e9a353 | 75 | } |
1af5a8c4 | 76 | #else |
1da177e4 | 77 | |
8ad4942c | 78 | struct fib_table *fib_new_table(struct net *net, u32 id) |
1da177e4 LT |
79 | { |
80 | struct fib_table *tb; | |
1af5a8c4 | 81 | unsigned int h; |
1da177e4 | 82 | |
1af5a8c4 PM |
83 | if (id == 0) |
84 | id = RT_TABLE_MAIN; | |
8ad4942c | 85 | tb = fib_get_table(net, id); |
1af5a8c4 PM |
86 | if (tb) |
87 | return tb; | |
1da177e4 LT |
88 | tb = fib_hash_init(id); |
89 | if (!tb) | |
90 | return NULL; | |
1af5a8c4 | 91 | h = id & (FIB_TABLE_HASHSZ - 1); |
e4aef8ae | 92 | hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]); |
1da177e4 LT |
93 | return tb; |
94 | } | |
95 | ||
8ad4942c | 96 | struct fib_table *fib_get_table(struct net *net, u32 id) |
1af5a8c4 PM |
97 | { |
98 | struct fib_table *tb; | |
99 | struct hlist_node *node; | |
e4aef8ae | 100 | struct hlist_head *head; |
1af5a8c4 | 101 | unsigned int h; |
1da177e4 | 102 | |
1af5a8c4 PM |
103 | if (id == 0) |
104 | id = RT_TABLE_MAIN; | |
105 | h = id & (FIB_TABLE_HASHSZ - 1); | |
e4aef8ae | 106 | |
1af5a8c4 | 107 | rcu_read_lock(); |
e4aef8ae DL |
108 | head = &net->ipv4.fib_table_hash[h]; |
109 | hlist_for_each_entry_rcu(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
110 | if (tb->tb_id == id) { |
111 | rcu_read_unlock(); | |
112 | return tb; | |
113 | } | |
114 | } | |
115 | rcu_read_unlock(); | |
116 | return NULL; | |
117 | } | |
1da177e4 LT |
118 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
119 | ||
e4aef8ae | 120 | static void fib_flush(struct net *net) |
1da177e4 LT |
121 | { |
122 | int flushed = 0; | |
1da177e4 | 123 | struct fib_table *tb; |
1af5a8c4 | 124 | struct hlist_node *node; |
e4aef8ae | 125 | struct hlist_head *head; |
1af5a8c4 | 126 | unsigned int h; |
1da177e4 | 127 | |
1af5a8c4 | 128 | for (h = 0; h < FIB_TABLE_HASHSZ; h++) { |
e4aef8ae DL |
129 | head = &net->ipv4.fib_table_hash[h]; |
130 | hlist_for_each_entry(tb, node, head, tb_hlist) | |
1af5a8c4 | 131 | flushed += tb->tb_flush(tb); |
1da177e4 | 132 | } |
1da177e4 LT |
133 | |
134 | if (flushed) | |
135 | rt_cache_flush(-1); | |
136 | } | |
137 | ||
138 | /* | |
139 | * Find the first device with a given source address. | |
140 | */ | |
141 | ||
60cad5da | 142 | struct net_device * ip_dev_find(__be32 addr) |
1da177e4 LT |
143 | { |
144 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
145 | struct fib_result res; | |
146 | struct net_device *dev = NULL; | |
03cf786c | 147 | struct fib_table *local_table; |
1da177e4 LT |
148 | |
149 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
150 | res.r = NULL; | |
151 | #endif | |
152 | ||
8ad4942c | 153 | local_table = fib_get_table(&init_net, RT_TABLE_LOCAL); |
03cf786c | 154 | if (!local_table || local_table->tb_lookup(local_table, &fl, &res)) |
1da177e4 LT |
155 | return NULL; |
156 | if (res.type != RTN_LOCAL) | |
157 | goto out; | |
158 | dev = FIB_RES_DEV(res); | |
159 | ||
160 | if (dev) | |
161 | dev_hold(dev); | |
162 | out: | |
163 | fib_res_put(&res); | |
164 | return dev; | |
165 | } | |
166 | ||
05538116 LAT |
167 | /* |
168 | * Find address type as if only "dev" was present in the system. If | |
169 | * on_dev is NULL then all interfaces are taken into consideration. | |
170 | */ | |
6b175b26 EB |
171 | static inline unsigned __inet_dev_addr_type(struct net *net, |
172 | const struct net_device *dev, | |
05538116 | 173 | __be32 addr) |
1da177e4 LT |
174 | { |
175 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
176 | struct fib_result res; | |
177 | unsigned ret = RTN_BROADCAST; | |
03cf786c | 178 | struct fib_table *local_table; |
1da177e4 | 179 | |
f97c1e0c | 180 | if (ipv4_is_zeronet(addr) || ipv4_is_badclass(addr)) |
1da177e4 | 181 | return RTN_BROADCAST; |
f97c1e0c | 182 | if (ipv4_is_multicast(addr)) |
1da177e4 LT |
183 | return RTN_MULTICAST; |
184 | ||
185 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
186 | res.r = NULL; | |
187 | #endif | |
e905a9ed | 188 | |
6b175b26 | 189 | local_table = fib_get_table(net, RT_TABLE_LOCAL); |
03cf786c | 190 | if (local_table) { |
1da177e4 | 191 | ret = RTN_UNICAST; |
03cf786c | 192 | if (!local_table->tb_lookup(local_table, &fl, &res)) { |
05538116 LAT |
193 | if (!dev || dev == res.fi->fib_dev) |
194 | ret = res.type; | |
1da177e4 LT |
195 | fib_res_put(&res); |
196 | } | |
197 | } | |
198 | return ret; | |
199 | } | |
200 | ||
6b175b26 | 201 | unsigned int inet_addr_type(struct net *net, __be32 addr) |
05538116 | 202 | { |
6b175b26 | 203 | return __inet_dev_addr_type(net, NULL, addr); |
05538116 LAT |
204 | } |
205 | ||
6b175b26 EB |
206 | unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev, |
207 | __be32 addr) | |
05538116 | 208 | { |
6b175b26 | 209 | return __inet_dev_addr_type(net, dev, addr); |
05538116 LAT |
210 | } |
211 | ||
1da177e4 LT |
212 | /* Given (packet source, input interface) and optional (dst, oif, tos): |
213 | - (main) check, that source is valid i.e. not broadcast or our local | |
214 | address. | |
215 | - figure out what "logical" interface this packet arrived | |
216 | and calculate "specific destination" address. | |
217 | - check, that packet arrived from expected physical interface. | |
218 | */ | |
219 | ||
d9c9df8c AV |
220 | int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif, |
221 | struct net_device *dev, __be32 *spec_dst, u32 *itag) | |
1da177e4 LT |
222 | { |
223 | struct in_device *in_dev; | |
224 | struct flowi fl = { .nl_u = { .ip4_u = | |
225 | { .daddr = src, | |
226 | .saddr = dst, | |
227 | .tos = tos } }, | |
228 | .iif = oif }; | |
229 | struct fib_result res; | |
230 | int no_addr, rpf; | |
231 | int ret; | |
232 | ||
233 | no_addr = rpf = 0; | |
234 | rcu_read_lock(); | |
e5ed6399 | 235 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
236 | if (in_dev) { |
237 | no_addr = in_dev->ifa_list == NULL; | |
238 | rpf = IN_DEV_RPFILTER(in_dev); | |
239 | } | |
240 | rcu_read_unlock(); | |
241 | ||
242 | if (in_dev == NULL) | |
243 | goto e_inval; | |
244 | ||
245 | if (fib_lookup(&fl, &res)) | |
246 | goto last_resort; | |
247 | if (res.type != RTN_UNICAST) | |
248 | goto e_inval_res; | |
249 | *spec_dst = FIB_RES_PREFSRC(res); | |
250 | fib_combine_itag(itag, &res); | |
251 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
252 | if (FIB_RES_DEV(res) == dev || res.fi->fib_nhs > 1) | |
253 | #else | |
254 | if (FIB_RES_DEV(res) == dev) | |
255 | #endif | |
256 | { | |
257 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
258 | fib_res_put(&res); | |
259 | return ret; | |
260 | } | |
261 | fib_res_put(&res); | |
262 | if (no_addr) | |
263 | goto last_resort; | |
264 | if (rpf) | |
265 | goto e_inval; | |
266 | fl.oif = dev->ifindex; | |
267 | ||
268 | ret = 0; | |
269 | if (fib_lookup(&fl, &res) == 0) { | |
270 | if (res.type == RTN_UNICAST) { | |
271 | *spec_dst = FIB_RES_PREFSRC(res); | |
272 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
273 | } | |
274 | fib_res_put(&res); | |
275 | } | |
276 | return ret; | |
277 | ||
278 | last_resort: | |
279 | if (rpf) | |
280 | goto e_inval; | |
281 | *spec_dst = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE); | |
282 | *itag = 0; | |
283 | return 0; | |
284 | ||
285 | e_inval_res: | |
286 | fib_res_put(&res); | |
287 | e_inval: | |
288 | return -EINVAL; | |
289 | } | |
290 | ||
81f7bf6c | 291 | static inline __be32 sk_extract_addr(struct sockaddr *addr) |
4e902c57 TG |
292 | { |
293 | return ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
294 | } | |
295 | ||
296 | static int put_rtax(struct nlattr *mx, int len, int type, u32 value) | |
297 | { | |
298 | struct nlattr *nla; | |
299 | ||
300 | nla = (struct nlattr *) ((char *) mx + len); | |
301 | nla->nla_type = type; | |
302 | nla->nla_len = nla_attr_size(4); | |
303 | *(u32 *) nla_data(nla) = value; | |
304 | ||
305 | return len + nla_total_size(4); | |
306 | } | |
307 | ||
308 | static int rtentry_to_fib_config(int cmd, struct rtentry *rt, | |
309 | struct fib_config *cfg) | |
310 | { | |
6d85c10a | 311 | __be32 addr; |
4e902c57 TG |
312 | int plen; |
313 | ||
314 | memset(cfg, 0, sizeof(*cfg)); | |
4d1169c1 | 315 | cfg->fc_nlinfo.nl_net = &init_net; |
4e902c57 TG |
316 | |
317 | if (rt->rt_dst.sa_family != AF_INET) | |
318 | return -EAFNOSUPPORT; | |
319 | ||
320 | /* | |
321 | * Check mask for validity: | |
322 | * a) it must be contiguous. | |
323 | * b) destination must have all host bits clear. | |
324 | * c) if application forgot to set correct family (AF_INET), | |
325 | * reject request unless it is absolutely clear i.e. | |
326 | * both family and mask are zero. | |
327 | */ | |
328 | plen = 32; | |
329 | addr = sk_extract_addr(&rt->rt_dst); | |
330 | if (!(rt->rt_flags & RTF_HOST)) { | |
81f7bf6c | 331 | __be32 mask = sk_extract_addr(&rt->rt_genmask); |
4e902c57 TG |
332 | |
333 | if (rt->rt_genmask.sa_family != AF_INET) { | |
334 | if (mask || rt->rt_genmask.sa_family) | |
335 | return -EAFNOSUPPORT; | |
336 | } | |
337 | ||
338 | if (bad_mask(mask, addr)) | |
339 | return -EINVAL; | |
340 | ||
341 | plen = inet_mask_len(mask); | |
342 | } | |
343 | ||
344 | cfg->fc_dst_len = plen; | |
345 | cfg->fc_dst = addr; | |
346 | ||
347 | if (cmd != SIOCDELRT) { | |
348 | cfg->fc_nlflags = NLM_F_CREATE; | |
349 | cfg->fc_protocol = RTPROT_BOOT; | |
350 | } | |
351 | ||
352 | if (rt->rt_metric) | |
353 | cfg->fc_priority = rt->rt_metric - 1; | |
354 | ||
355 | if (rt->rt_flags & RTF_REJECT) { | |
356 | cfg->fc_scope = RT_SCOPE_HOST; | |
357 | cfg->fc_type = RTN_UNREACHABLE; | |
358 | return 0; | |
359 | } | |
360 | ||
361 | cfg->fc_scope = RT_SCOPE_NOWHERE; | |
362 | cfg->fc_type = RTN_UNICAST; | |
363 | ||
364 | if (rt->rt_dev) { | |
365 | char *colon; | |
366 | struct net_device *dev; | |
367 | char devname[IFNAMSIZ]; | |
368 | ||
369 | if (copy_from_user(devname, rt->rt_dev, IFNAMSIZ-1)) | |
370 | return -EFAULT; | |
371 | ||
372 | devname[IFNAMSIZ-1] = 0; | |
373 | colon = strchr(devname, ':'); | |
374 | if (colon) | |
375 | *colon = 0; | |
881d966b | 376 | dev = __dev_get_by_name(&init_net, devname); |
4e902c57 TG |
377 | if (!dev) |
378 | return -ENODEV; | |
379 | cfg->fc_oif = dev->ifindex; | |
380 | if (colon) { | |
381 | struct in_ifaddr *ifa; | |
382 | struct in_device *in_dev = __in_dev_get_rtnl(dev); | |
383 | if (!in_dev) | |
384 | return -ENODEV; | |
385 | *colon = ':'; | |
386 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) | |
387 | if (strcmp(ifa->ifa_label, devname) == 0) | |
388 | break; | |
389 | if (ifa == NULL) | |
390 | return -ENODEV; | |
391 | cfg->fc_prefsrc = ifa->ifa_local; | |
392 | } | |
393 | } | |
394 | ||
395 | addr = sk_extract_addr(&rt->rt_gateway); | |
396 | if (rt->rt_gateway.sa_family == AF_INET && addr) { | |
397 | cfg->fc_gw = addr; | |
398 | if (rt->rt_flags & RTF_GATEWAY && | |
6b175b26 | 399 | inet_addr_type(&init_net, addr) == RTN_UNICAST) |
4e902c57 TG |
400 | cfg->fc_scope = RT_SCOPE_UNIVERSE; |
401 | } | |
402 | ||
403 | if (cmd == SIOCDELRT) | |
404 | return 0; | |
405 | ||
406 | if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw) | |
407 | return -EINVAL; | |
408 | ||
409 | if (cfg->fc_scope == RT_SCOPE_NOWHERE) | |
410 | cfg->fc_scope = RT_SCOPE_LINK; | |
411 | ||
412 | if (rt->rt_flags & (RTF_MTU | RTF_WINDOW | RTF_IRTT)) { | |
413 | struct nlattr *mx; | |
414 | int len = 0; | |
415 | ||
416 | mx = kzalloc(3 * nla_total_size(4), GFP_KERNEL); | |
e905a9ed | 417 | if (mx == NULL) |
4e902c57 TG |
418 | return -ENOMEM; |
419 | ||
420 | if (rt->rt_flags & RTF_MTU) | |
421 | len = put_rtax(mx, len, RTAX_ADVMSS, rt->rt_mtu - 40); | |
422 | ||
423 | if (rt->rt_flags & RTF_WINDOW) | |
424 | len = put_rtax(mx, len, RTAX_WINDOW, rt->rt_window); | |
425 | ||
426 | if (rt->rt_flags & RTF_IRTT) | |
427 | len = put_rtax(mx, len, RTAX_RTT, rt->rt_irtt << 3); | |
428 | ||
429 | cfg->fc_mx = mx; | |
430 | cfg->fc_mx_len = len; | |
431 | } | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | /* |
437 | * Handle IP routing ioctl calls. These are used to manipulate the routing tables | |
438 | */ | |
e905a9ed | 439 | |
1da177e4 LT |
440 | int ip_rt_ioctl(unsigned int cmd, void __user *arg) |
441 | { | |
4e902c57 TG |
442 | struct fib_config cfg; |
443 | struct rtentry rt; | |
1da177e4 | 444 | int err; |
1da177e4 LT |
445 | |
446 | switch (cmd) { | |
447 | case SIOCADDRT: /* Add a route */ | |
448 | case SIOCDELRT: /* Delete a route */ | |
449 | if (!capable(CAP_NET_ADMIN)) | |
450 | return -EPERM; | |
4e902c57 TG |
451 | |
452 | if (copy_from_user(&rt, arg, sizeof(rt))) | |
1da177e4 | 453 | return -EFAULT; |
4e902c57 | 454 | |
1da177e4 | 455 | rtnl_lock(); |
4e902c57 | 456 | err = rtentry_to_fib_config(cmd, &rt, &cfg); |
1da177e4 | 457 | if (err == 0) { |
4e902c57 TG |
458 | struct fib_table *tb; |
459 | ||
1da177e4 | 460 | if (cmd == SIOCDELRT) { |
8ad4942c | 461 | tb = fib_get_table(&init_net, cfg.fc_table); |
1da177e4 | 462 | if (tb) |
4e902c57 TG |
463 | err = tb->tb_delete(tb, &cfg); |
464 | else | |
465 | err = -ESRCH; | |
1da177e4 | 466 | } else { |
8ad4942c | 467 | tb = fib_new_table(&init_net, cfg.fc_table); |
1da177e4 | 468 | if (tb) |
4e902c57 TG |
469 | err = tb->tb_insert(tb, &cfg); |
470 | else | |
471 | err = -ENOBUFS; | |
1da177e4 | 472 | } |
4e902c57 TG |
473 | |
474 | /* allocated by rtentry_to_fib_config() */ | |
475 | kfree(cfg.fc_mx); | |
1da177e4 LT |
476 | } |
477 | rtnl_unlock(); | |
478 | return err; | |
479 | } | |
480 | return -EINVAL; | |
481 | } | |
482 | ||
ef7c79ed | 483 | const struct nla_policy rtm_ipv4_policy[RTA_MAX+1] = { |
4e902c57 TG |
484 | [RTA_DST] = { .type = NLA_U32 }, |
485 | [RTA_SRC] = { .type = NLA_U32 }, | |
486 | [RTA_IIF] = { .type = NLA_U32 }, | |
487 | [RTA_OIF] = { .type = NLA_U32 }, | |
488 | [RTA_GATEWAY] = { .type = NLA_U32 }, | |
489 | [RTA_PRIORITY] = { .type = NLA_U32 }, | |
490 | [RTA_PREFSRC] = { .type = NLA_U32 }, | |
491 | [RTA_METRICS] = { .type = NLA_NESTED }, | |
5176f91e | 492 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
4e902c57 TG |
493 | [RTA_PROTOINFO] = { .type = NLA_U32 }, |
494 | [RTA_FLOW] = { .type = NLA_U32 }, | |
4e902c57 TG |
495 | }; |
496 | ||
497 | static int rtm_to_fib_config(struct sk_buff *skb, struct nlmsghdr *nlh, | |
498 | struct fib_config *cfg) | |
1da177e4 | 499 | { |
4e902c57 TG |
500 | struct nlattr *attr; |
501 | int err, remaining; | |
502 | struct rtmsg *rtm; | |
503 | ||
504 | err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy); | |
505 | if (err < 0) | |
506 | goto errout; | |
507 | ||
508 | memset(cfg, 0, sizeof(*cfg)); | |
509 | ||
510 | rtm = nlmsg_data(nlh); | |
4e902c57 | 511 | cfg->fc_dst_len = rtm->rtm_dst_len; |
4e902c57 TG |
512 | cfg->fc_tos = rtm->rtm_tos; |
513 | cfg->fc_table = rtm->rtm_table; | |
514 | cfg->fc_protocol = rtm->rtm_protocol; | |
515 | cfg->fc_scope = rtm->rtm_scope; | |
516 | cfg->fc_type = rtm->rtm_type; | |
517 | cfg->fc_flags = rtm->rtm_flags; | |
518 | cfg->fc_nlflags = nlh->nlmsg_flags; | |
519 | ||
520 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; | |
521 | cfg->fc_nlinfo.nlh = nlh; | |
4d1169c1 | 522 | cfg->fc_nlinfo.nl_net = &init_net; |
4e902c57 | 523 | |
a0ee18b9 TG |
524 | if (cfg->fc_type > RTN_MAX) { |
525 | err = -EINVAL; | |
526 | goto errout; | |
527 | } | |
528 | ||
4e902c57 | 529 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) { |
8f4c1f9b | 530 | switch (nla_type(attr)) { |
4e902c57 | 531 | case RTA_DST: |
17fb2c64 | 532 | cfg->fc_dst = nla_get_be32(attr); |
4e902c57 | 533 | break; |
4e902c57 TG |
534 | case RTA_OIF: |
535 | cfg->fc_oif = nla_get_u32(attr); | |
536 | break; | |
537 | case RTA_GATEWAY: | |
17fb2c64 | 538 | cfg->fc_gw = nla_get_be32(attr); |
4e902c57 TG |
539 | break; |
540 | case RTA_PRIORITY: | |
541 | cfg->fc_priority = nla_get_u32(attr); | |
542 | break; | |
543 | case RTA_PREFSRC: | |
17fb2c64 | 544 | cfg->fc_prefsrc = nla_get_be32(attr); |
4e902c57 TG |
545 | break; |
546 | case RTA_METRICS: | |
547 | cfg->fc_mx = nla_data(attr); | |
548 | cfg->fc_mx_len = nla_len(attr); | |
549 | break; | |
550 | case RTA_MULTIPATH: | |
551 | cfg->fc_mp = nla_data(attr); | |
552 | cfg->fc_mp_len = nla_len(attr); | |
553 | break; | |
554 | case RTA_FLOW: | |
555 | cfg->fc_flow = nla_get_u32(attr); | |
556 | break; | |
4e902c57 TG |
557 | case RTA_TABLE: |
558 | cfg->fc_table = nla_get_u32(attr); | |
559 | break; | |
1da177e4 LT |
560 | } |
561 | } | |
4e902c57 | 562 | |
1da177e4 | 563 | return 0; |
4e902c57 TG |
564 | errout: |
565 | return err; | |
1da177e4 LT |
566 | } |
567 | ||
63f3444f | 568 | static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 569 | { |
b854272b | 570 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
571 | struct fib_config cfg; |
572 | struct fib_table *tb; | |
573 | int err; | |
1da177e4 | 574 | |
b854272b DL |
575 | if (net != &init_net) |
576 | return -EINVAL; | |
577 | ||
4e902c57 TG |
578 | err = rtm_to_fib_config(skb, nlh, &cfg); |
579 | if (err < 0) | |
580 | goto errout; | |
1da177e4 | 581 | |
8ad4942c | 582 | tb = fib_get_table(net, cfg.fc_table); |
4e902c57 TG |
583 | if (tb == NULL) { |
584 | err = -ESRCH; | |
585 | goto errout; | |
586 | } | |
587 | ||
588 | err = tb->tb_delete(tb, &cfg); | |
589 | errout: | |
590 | return err; | |
1da177e4 LT |
591 | } |
592 | ||
63f3444f | 593 | static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 594 | { |
b854272b | 595 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
596 | struct fib_config cfg; |
597 | struct fib_table *tb; | |
598 | int err; | |
1da177e4 | 599 | |
b854272b DL |
600 | if (net != &init_net) |
601 | return -EINVAL; | |
602 | ||
4e902c57 TG |
603 | err = rtm_to_fib_config(skb, nlh, &cfg); |
604 | if (err < 0) | |
605 | goto errout; | |
1da177e4 | 606 | |
8ad4942c | 607 | tb = fib_new_table(&init_net, cfg.fc_table); |
4e902c57 TG |
608 | if (tb == NULL) { |
609 | err = -ENOBUFS; | |
610 | goto errout; | |
611 | } | |
612 | ||
613 | err = tb->tb_insert(tb, &cfg); | |
614 | errout: | |
615 | return err; | |
1da177e4 LT |
616 | } |
617 | ||
63f3444f | 618 | static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 619 | { |
b854272b | 620 | struct net *net = skb->sk->sk_net; |
1af5a8c4 PM |
621 | unsigned int h, s_h; |
622 | unsigned int e = 0, s_e; | |
1da177e4 | 623 | struct fib_table *tb; |
1af5a8c4 | 624 | struct hlist_node *node; |
e4aef8ae | 625 | struct hlist_head *head; |
1af5a8c4 | 626 | int dumped = 0; |
1da177e4 | 627 | |
b854272b DL |
628 | if (net != &init_net) |
629 | return 0; | |
630 | ||
be403ea1 TG |
631 | if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) && |
632 | ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED) | |
1da177e4 LT |
633 | return ip_rt_dump(skb, cb); |
634 | ||
1af5a8c4 PM |
635 | s_h = cb->args[0]; |
636 | s_e = cb->args[1]; | |
637 | ||
638 | for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) { | |
639 | e = 0; | |
e4aef8ae DL |
640 | head = &net->ipv4.fib_table_hash[h]; |
641 | hlist_for_each_entry(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
642 | if (e < s_e) |
643 | goto next; | |
644 | if (dumped) | |
645 | memset(&cb->args[2], 0, sizeof(cb->args) - | |
e905a9ed | 646 | 2 * sizeof(cb->args[0])); |
1af5a8c4 PM |
647 | if (tb->tb_dump(tb, skb, cb) < 0) |
648 | goto out; | |
649 | dumped = 1; | |
650 | next: | |
651 | e++; | |
652 | } | |
1da177e4 | 653 | } |
1af5a8c4 PM |
654 | out: |
655 | cb->args[1] = e; | |
656 | cb->args[0] = h; | |
1da177e4 LT |
657 | |
658 | return skb->len; | |
659 | } | |
660 | ||
661 | /* Prepare and feed intra-kernel routing request. | |
662 | Really, it should be netlink message, but :-( netlink | |
663 | can be not configured, so that we feed it directly | |
664 | to fib engine. It is legal, because all events occur | |
665 | only when netlink is already locked. | |
666 | */ | |
667 | ||
81f7bf6c | 668 | static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa) |
1da177e4 | 669 | { |
4e902c57 TG |
670 | struct fib_table *tb; |
671 | struct fib_config cfg = { | |
672 | .fc_protocol = RTPROT_KERNEL, | |
673 | .fc_type = type, | |
674 | .fc_dst = dst, | |
675 | .fc_dst_len = dst_len, | |
676 | .fc_prefsrc = ifa->ifa_local, | |
677 | .fc_oif = ifa->ifa_dev->dev->ifindex, | |
678 | .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND, | |
4d1169c1 DL |
679 | .fc_nlinfo = { |
680 | .nl_net = &init_net, | |
681 | }, | |
4e902c57 | 682 | }; |
1da177e4 LT |
683 | |
684 | if (type == RTN_UNICAST) | |
8ad4942c | 685 | tb = fib_new_table(&init_net, RT_TABLE_MAIN); |
1da177e4 | 686 | else |
8ad4942c | 687 | tb = fib_new_table(&init_net, RT_TABLE_LOCAL); |
1da177e4 LT |
688 | |
689 | if (tb == NULL) | |
690 | return; | |
691 | ||
4e902c57 | 692 | cfg.fc_table = tb->tb_id; |
1da177e4 | 693 | |
4e902c57 TG |
694 | if (type != RTN_LOCAL) |
695 | cfg.fc_scope = RT_SCOPE_LINK; | |
696 | else | |
697 | cfg.fc_scope = RT_SCOPE_HOST; | |
1da177e4 LT |
698 | |
699 | if (cmd == RTM_NEWROUTE) | |
4e902c57 | 700 | tb->tb_insert(tb, &cfg); |
1da177e4 | 701 | else |
4e902c57 | 702 | tb->tb_delete(tb, &cfg); |
1da177e4 LT |
703 | } |
704 | ||
0ff60a45 | 705 | void fib_add_ifaddr(struct in_ifaddr *ifa) |
1da177e4 LT |
706 | { |
707 | struct in_device *in_dev = ifa->ifa_dev; | |
708 | struct net_device *dev = in_dev->dev; | |
709 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
710 | __be32 mask = ifa->ifa_mask; |
711 | __be32 addr = ifa->ifa_local; | |
712 | __be32 prefix = ifa->ifa_address&mask; | |
1da177e4 LT |
713 | |
714 | if (ifa->ifa_flags&IFA_F_SECONDARY) { | |
715 | prim = inet_ifa_byprefix(in_dev, prefix, mask); | |
716 | if (prim == NULL) { | |
717 | printk(KERN_DEBUG "fib_add_ifaddr: bug: prim == NULL\n"); | |
718 | return; | |
719 | } | |
720 | } | |
721 | ||
722 | fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim); | |
723 | ||
724 | if (!(dev->flags&IFF_UP)) | |
725 | return; | |
726 | ||
727 | /* Add broadcast address, if it is explicitly assigned. */ | |
a144ea4b | 728 | if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF)) |
1da177e4 LT |
729 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); |
730 | ||
f97c1e0c | 731 | if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) && |
1da177e4 LT |
732 | (prefix != addr || ifa->ifa_prefixlen < 32)) { |
733 | fib_magic(RTM_NEWROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
734 | RTN_UNICAST, prefix, ifa->ifa_prefixlen, prim); | |
735 | ||
736 | /* Add network specific broadcasts, when it takes a sense */ | |
737 | if (ifa->ifa_prefixlen < 31) { | |
738 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim); | |
739 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix|~mask, 32, prim); | |
740 | } | |
741 | } | |
742 | } | |
743 | ||
744 | static void fib_del_ifaddr(struct in_ifaddr *ifa) | |
745 | { | |
746 | struct in_device *in_dev = ifa->ifa_dev; | |
747 | struct net_device *dev = in_dev->dev; | |
748 | struct in_ifaddr *ifa1; | |
749 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
750 | __be32 brd = ifa->ifa_address|~ifa->ifa_mask; |
751 | __be32 any = ifa->ifa_address&ifa->ifa_mask; | |
1da177e4 LT |
752 | #define LOCAL_OK 1 |
753 | #define BRD_OK 2 | |
754 | #define BRD0_OK 4 | |
755 | #define BRD1_OK 8 | |
756 | unsigned ok = 0; | |
757 | ||
758 | if (!(ifa->ifa_flags&IFA_F_SECONDARY)) | |
759 | fib_magic(RTM_DELROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
760 | RTN_UNICAST, any, ifa->ifa_prefixlen, prim); | |
761 | else { | |
762 | prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask); | |
763 | if (prim == NULL) { | |
764 | printk(KERN_DEBUG "fib_del_ifaddr: bug: prim == NULL\n"); | |
765 | return; | |
766 | } | |
767 | } | |
768 | ||
769 | /* Deletion is more complicated than add. | |
770 | We should take care of not to delete too much :-) | |
771 | ||
772 | Scan address list to be sure that addresses are really gone. | |
773 | */ | |
774 | ||
775 | for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { | |
776 | if (ifa->ifa_local == ifa1->ifa_local) | |
777 | ok |= LOCAL_OK; | |
778 | if (ifa->ifa_broadcast == ifa1->ifa_broadcast) | |
779 | ok |= BRD_OK; | |
780 | if (brd == ifa1->ifa_broadcast) | |
781 | ok |= BRD1_OK; | |
782 | if (any == ifa1->ifa_broadcast) | |
783 | ok |= BRD0_OK; | |
784 | } | |
785 | ||
786 | if (!(ok&BRD_OK)) | |
787 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); | |
788 | if (!(ok&BRD1_OK)) | |
789 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim); | |
790 | if (!(ok&BRD0_OK)) | |
791 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim); | |
792 | if (!(ok&LOCAL_OK)) { | |
793 | fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim); | |
794 | ||
795 | /* Check, that this local address finally disappeared. */ | |
6b175b26 | 796 | if (inet_addr_type(&init_net, ifa->ifa_local) != RTN_LOCAL) { |
1da177e4 LT |
797 | /* And the last, but not the least thing. |
798 | We must flush stray FIB entries. | |
799 | ||
800 | First of all, we scan fib_info list searching | |
801 | for stray nexthop entries, then ignite fib_flush. | |
802 | */ | |
803 | if (fib_sync_down(ifa->ifa_local, NULL, 0)) | |
e4aef8ae | 804 | fib_flush(&init_net); |
1da177e4 LT |
805 | } |
806 | } | |
807 | #undef LOCAL_OK | |
808 | #undef BRD_OK | |
809 | #undef BRD0_OK | |
810 | #undef BRD1_OK | |
811 | } | |
812 | ||
246955fe RO |
813 | static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb ) |
814 | { | |
e905a9ed | 815 | |
246955fe | 816 | struct fib_result res; |
5f300893 | 817 | struct flowi fl = { .mark = frn->fl_mark, |
47dcf0cb | 818 | .nl_u = { .ip4_u = { .daddr = frn->fl_addr, |
246955fe RO |
819 | .tos = frn->fl_tos, |
820 | .scope = frn->fl_scope } } }; | |
1194ed0a | 821 | |
912a41a4 SV |
822 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
823 | res.r = NULL; | |
824 | #endif | |
825 | ||
1194ed0a | 826 | frn->err = -ENOENT; |
246955fe RO |
827 | if (tb) { |
828 | local_bh_disable(); | |
829 | ||
830 | frn->tb_id = tb->tb_id; | |
831 | frn->err = tb->tb_lookup(tb, &fl, &res); | |
832 | ||
833 | if (!frn->err) { | |
834 | frn->prefixlen = res.prefixlen; | |
835 | frn->nh_sel = res.nh_sel; | |
836 | frn->type = res.type; | |
837 | frn->scope = res.scope; | |
1194ed0a | 838 | fib_res_put(&res); |
246955fe RO |
839 | } |
840 | local_bh_enable(); | |
841 | } | |
842 | } | |
843 | ||
28f7b036 | 844 | static void nl_fib_input(struct sk_buff *skb) |
246955fe | 845 | { |
6bd48fcf | 846 | struct net *net; |
246955fe | 847 | struct fib_result_nl *frn; |
28f7b036 | 848 | struct nlmsghdr *nlh; |
246955fe | 849 | struct fib_table *tb; |
28f7b036 | 850 | u32 pid; |
1194ed0a | 851 | |
6bd48fcf | 852 | net = skb->sk->sk_net; |
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); |
6bd48fcf | 864 | tb = fib_get_table(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 */ |
6bd48fcf | 871 | netlink_unicast(net->ipv4.fibnl, skb, pid, MSG_DONTWAIT); |
e905a9ed | 872 | } |
246955fe | 873 | |
7b1a74fd | 874 | static int nl_fib_lookup_init(struct net *net) |
246955fe | 875 | { |
6bd48fcf DL |
876 | struct sock *sk; |
877 | sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0, | |
878 | nl_fib_input, NULL, THIS_MODULE); | |
879 | if (sk == NULL) | |
7b1a74fd | 880 | return -EAFNOSUPPORT; |
6bd48fcf DL |
881 | /* Don't hold an extra reference on the namespace */ |
882 | put_net(sk->sk_net); | |
883 | net->ipv4.fibnl = sk; | |
7b1a74fd DL |
884 | return 0; |
885 | } | |
886 | ||
887 | static void nl_fib_lookup_exit(struct net *net) | |
888 | { | |
6bd48fcf DL |
889 | /* At the last minute lie and say this is a socket for the |
890 | * initial network namespace. So the socket will be safe to free. | |
891 | */ | |
892 | net->ipv4.fibnl->sk_net = get_net(&init_net); | |
893 | sock_put(net->ipv4.fibnl); | |
246955fe RO |
894 | } |
895 | ||
1da177e4 LT |
896 | static void fib_disable_ip(struct net_device *dev, int force) |
897 | { | |
898 | if (fib_sync_down(0, dev, force)) | |
e4aef8ae | 899 | fib_flush(&init_net); |
1da177e4 LT |
900 | rt_cache_flush(0); |
901 | arp_ifdown(dev); | |
902 | } | |
903 | ||
904 | static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
905 | { | |
906 | struct in_ifaddr *ifa = (struct in_ifaddr*)ptr; | |
907 | ||
908 | switch (event) { | |
909 | case NETDEV_UP: | |
910 | fib_add_ifaddr(ifa); | |
911 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
912 | fib_sync_up(ifa->ifa_dev->dev); | |
913 | #endif | |
914 | rt_cache_flush(-1); | |
915 | break; | |
916 | case NETDEV_DOWN: | |
917 | fib_del_ifaddr(ifa); | |
9fcc2e8a | 918 | if (ifa->ifa_dev->ifa_list == NULL) { |
1da177e4 LT |
919 | /* Last address was deleted from this interface. |
920 | Disable IP. | |
921 | */ | |
922 | fib_disable_ip(ifa->ifa_dev->dev, 1); | |
923 | } else { | |
924 | rt_cache_flush(-1); | |
925 | } | |
926 | break; | |
927 | } | |
928 | return NOTIFY_DONE; | |
929 | } | |
930 | ||
931 | static int fib_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
932 | { | |
933 | struct net_device *dev = ptr; | |
e5ed6399 | 934 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 | 935 | |
e9dc8653 EB |
936 | if (dev->nd_net != &init_net) |
937 | return NOTIFY_DONE; | |
938 | ||
1da177e4 LT |
939 | if (event == NETDEV_UNREGISTER) { |
940 | fib_disable_ip(dev, 2); | |
941 | return NOTIFY_DONE; | |
942 | } | |
943 | ||
944 | if (!in_dev) | |
945 | return NOTIFY_DONE; | |
946 | ||
947 | switch (event) { | |
948 | case NETDEV_UP: | |
949 | for_ifa(in_dev) { | |
950 | fib_add_ifaddr(ifa); | |
951 | } endfor_ifa(in_dev); | |
952 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
953 | fib_sync_up(dev); | |
954 | #endif | |
955 | rt_cache_flush(-1); | |
956 | break; | |
957 | case NETDEV_DOWN: | |
958 | fib_disable_ip(dev, 0); | |
959 | break; | |
960 | case NETDEV_CHANGEMTU: | |
961 | case NETDEV_CHANGE: | |
962 | rt_cache_flush(0); | |
963 | break; | |
964 | } | |
965 | return NOTIFY_DONE; | |
966 | } | |
967 | ||
968 | static struct notifier_block fib_inetaddr_notifier = { | |
969 | .notifier_call =fib_inetaddr_event, | |
970 | }; | |
971 | ||
972 | static struct notifier_block fib_netdev_notifier = { | |
973 | .notifier_call =fib_netdev_event, | |
974 | }; | |
975 | ||
7b1a74fd | 976 | static int __net_init ip_fib_net_init(struct net *net) |
1da177e4 | 977 | { |
1af5a8c4 PM |
978 | unsigned int i; |
979 | ||
e4aef8ae DL |
980 | net->ipv4.fib_table_hash = kzalloc( |
981 | sizeof(struct hlist_head)*FIB_TABLE_HASHSZ, GFP_KERNEL); | |
982 | if (net->ipv4.fib_table_hash == NULL) | |
983 | return -ENOMEM; | |
984 | ||
1af5a8c4 | 985 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) |
e4aef8ae | 986 | INIT_HLIST_HEAD(&net->ipv4.fib_table_hash[i]); |
c3e9a353 | 987 | |
7b1a74fd DL |
988 | return fib4_rules_init(net); |
989 | } | |
1da177e4 | 990 | |
7b1a74fd DL |
991 | static void __net_exit ip_fib_net_exit(struct net *net) |
992 | { | |
993 | unsigned int i; | |
994 | ||
995 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
996 | fib4_rules_exit(net); | |
997 | #endif | |
998 | ||
999 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) { | |
1000 | struct fib_table *tb; | |
1001 | struct hlist_head *head; | |
1002 | struct hlist_node *node, *tmp; | |
63f3444f | 1003 | |
e4aef8ae | 1004 | head = &net->ipv4.fib_table_hash[i]; |
7b1a74fd DL |
1005 | hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) { |
1006 | hlist_del(node); | |
1007 | tb->tb_flush(tb); | |
1008 | kfree(tb); | |
1009 | } | |
1010 | } | |
e4aef8ae | 1011 | kfree(net->ipv4.fib_table_hash); |
7b1a74fd DL |
1012 | } |
1013 | ||
1014 | static int __net_init fib_net_init(struct net *net) | |
1015 | { | |
1016 | int error; | |
1017 | ||
1018 | error = 0; | |
1019 | if (net != &init_net) | |
1020 | goto out; | |
1021 | ||
1022 | error = ip_fib_net_init(net); | |
1023 | if (error < 0) | |
1024 | goto out; | |
1025 | error = nl_fib_lookup_init(net); | |
1026 | if (error < 0) | |
1027 | goto out_nlfl; | |
1028 | error = fib_proc_init(net); | |
1029 | if (error < 0) | |
1030 | goto out_proc; | |
1031 | out: | |
1032 | return error; | |
1033 | ||
1034 | out_proc: | |
1035 | nl_fib_lookup_exit(net); | |
1036 | out_nlfl: | |
1037 | ip_fib_net_exit(net); | |
1038 | goto out; | |
1039 | } | |
1040 | ||
1041 | static void __net_exit fib_net_exit(struct net *net) | |
1042 | { | |
1043 | fib_proc_exit(net); | |
1044 | nl_fib_lookup_exit(net); | |
1045 | ip_fib_net_exit(net); | |
1046 | } | |
1047 | ||
1048 | static struct pernet_operations fib_net_ops = { | |
1049 | .init = fib_net_init, | |
1050 | .exit = fib_net_exit, | |
1051 | }; | |
1052 | ||
1053 | void __init ip_fib_init(void) | |
1054 | { | |
63f3444f TG |
1055 | rtnl_register(PF_INET, RTM_NEWROUTE, inet_rtm_newroute, NULL); |
1056 | rtnl_register(PF_INET, RTM_DELROUTE, inet_rtm_delroute, NULL); | |
1057 | rtnl_register(PF_INET, RTM_GETROUTE, NULL, inet_dump_fib); | |
7b1a74fd DL |
1058 | |
1059 | register_pernet_subsys(&fib_net_ops); | |
1060 | register_netdevice_notifier(&fib_netdev_notifier); | |
1061 | register_inetaddr_notifier(&fib_inetaddr_notifier); | |
1da177e4 LT |
1062 | } |
1063 | ||
1064 | EXPORT_SYMBOL(inet_addr_type); | |
05538116 | 1065 | EXPORT_SYMBOL(inet_dev_addr_type); |
a1e8733e | 1066 | EXPORT_SYMBOL(ip_dev_find); |