Commit | Line | Data |
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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 | 49 | |
1da177e4 LT |
50 | #ifndef CONFIG_IP_MULTIPLE_TABLES |
51 | ||
7b1a74fd | 52 | static int __net_init fib4_rules_init(struct net *net) |
c3e9a353 | 53 | { |
93456b6d DL |
54 | struct fib_table *local_table, *main_table; |
55 | ||
7f9b8052 | 56 | local_table = fib_hash_table(RT_TABLE_LOCAL); |
93456b6d | 57 | if (local_table == NULL) |
dbb50165 DL |
58 | return -ENOMEM; |
59 | ||
7f9b8052 | 60 | main_table = fib_hash_table(RT_TABLE_MAIN); |
93456b6d | 61 | if (main_table == NULL) |
dbb50165 DL |
62 | goto fail; |
63 | ||
93456b6d | 64 | hlist_add_head_rcu(&local_table->tb_hlist, |
e4aef8ae | 65 | &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX]); |
93456b6d | 66 | hlist_add_head_rcu(&main_table->tb_hlist, |
e4aef8ae | 67 | &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]); |
dbb50165 DL |
68 | return 0; |
69 | ||
70 | fail: | |
93456b6d | 71 | kfree(local_table); |
dbb50165 | 72 | return -ENOMEM; |
c3e9a353 | 73 | } |
1af5a8c4 | 74 | #else |
1da177e4 | 75 | |
8ad4942c | 76 | struct fib_table *fib_new_table(struct net *net, u32 id) |
1da177e4 LT |
77 | { |
78 | struct fib_table *tb; | |
1af5a8c4 | 79 | unsigned int h; |
1da177e4 | 80 | |
1af5a8c4 PM |
81 | if (id == 0) |
82 | id = RT_TABLE_MAIN; | |
8ad4942c | 83 | tb = fib_get_table(net, id); |
1af5a8c4 PM |
84 | if (tb) |
85 | return tb; | |
7f9b8052 SH |
86 | |
87 | tb = fib_hash_table(id); | |
1da177e4 LT |
88 | if (!tb) |
89 | return NULL; | |
1af5a8c4 | 90 | h = id & (FIB_TABLE_HASHSZ - 1); |
e4aef8ae | 91 | hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]); |
1da177e4 LT |
92 | return tb; |
93 | } | |
94 | ||
8ad4942c | 95 | struct fib_table *fib_get_table(struct net *net, u32 id) |
1af5a8c4 PM |
96 | { |
97 | struct fib_table *tb; | |
98 | struct hlist_node *node; | |
e4aef8ae | 99 | struct hlist_head *head; |
1af5a8c4 | 100 | unsigned int h; |
1da177e4 | 101 | |
1af5a8c4 PM |
102 | if (id == 0) |
103 | id = RT_TABLE_MAIN; | |
104 | h = id & (FIB_TABLE_HASHSZ - 1); | |
e4aef8ae | 105 | |
1af5a8c4 | 106 | rcu_read_lock(); |
e4aef8ae DL |
107 | head = &net->ipv4.fib_table_hash[h]; |
108 | hlist_for_each_entry_rcu(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
109 | if (tb->tb_id == id) { |
110 | rcu_read_unlock(); | |
111 | return tb; | |
112 | } | |
113 | } | |
114 | rcu_read_unlock(); | |
115 | return NULL; | |
116 | } | |
1da177e4 LT |
117 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
118 | ||
e4aef8ae | 119 | static void fib_flush(struct net *net) |
1da177e4 LT |
120 | { |
121 | int flushed = 0; | |
1da177e4 | 122 | struct fib_table *tb; |
1af5a8c4 | 123 | struct hlist_node *node; |
e4aef8ae | 124 | struct hlist_head *head; |
1af5a8c4 | 125 | unsigned int h; |
1da177e4 | 126 | |
1af5a8c4 | 127 | for (h = 0; h < FIB_TABLE_HASHSZ; h++) { |
e4aef8ae DL |
128 | head = &net->ipv4.fib_table_hash[h]; |
129 | hlist_for_each_entry(tb, node, head, tb_hlist) | |
1af5a8c4 | 130 | flushed += tb->tb_flush(tb); |
1da177e4 | 131 | } |
1da177e4 LT |
132 | |
133 | if (flushed) | |
134 | rt_cache_flush(-1); | |
135 | } | |
136 | ||
137 | /* | |
138 | * Find the first device with a given source address. | |
139 | */ | |
140 | ||
60cad5da | 141 | struct net_device * ip_dev_find(__be32 addr) |
1da177e4 LT |
142 | { |
143 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
144 | struct fib_result res; | |
145 | struct net_device *dev = NULL; | |
03cf786c | 146 | struct fib_table *local_table; |
1da177e4 LT |
147 | |
148 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
149 | res.r = NULL; | |
150 | #endif | |
151 | ||
8ad4942c | 152 | local_table = fib_get_table(&init_net, RT_TABLE_LOCAL); |
03cf786c | 153 | if (!local_table || local_table->tb_lookup(local_table, &fl, &res)) |
1da177e4 LT |
154 | return NULL; |
155 | if (res.type != RTN_LOCAL) | |
156 | goto out; | |
157 | dev = FIB_RES_DEV(res); | |
158 | ||
159 | if (dev) | |
160 | dev_hold(dev); | |
161 | out: | |
162 | fib_res_put(&res); | |
163 | return dev; | |
164 | } | |
165 | ||
05538116 LAT |
166 | /* |
167 | * Find address type as if only "dev" was present in the system. If | |
168 | * on_dev is NULL then all interfaces are taken into consideration. | |
169 | */ | |
6b175b26 EB |
170 | static inline unsigned __inet_dev_addr_type(struct net *net, |
171 | const struct net_device *dev, | |
05538116 | 172 | __be32 addr) |
1da177e4 LT |
173 | { |
174 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
175 | struct fib_result res; | |
176 | unsigned ret = RTN_BROADCAST; | |
03cf786c | 177 | struct fib_table *local_table; |
1da177e4 | 178 | |
1e637c74 | 179 | if (ipv4_is_zeronet(addr) || ipv4_is_lbcast(addr)) |
1da177e4 | 180 | return RTN_BROADCAST; |
f97c1e0c | 181 | if (ipv4_is_multicast(addr)) |
1da177e4 LT |
182 | return RTN_MULTICAST; |
183 | ||
184 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
185 | res.r = NULL; | |
186 | #endif | |
e905a9ed | 187 | |
6b175b26 | 188 | local_table = fib_get_table(net, RT_TABLE_LOCAL); |
03cf786c | 189 | if (local_table) { |
1da177e4 | 190 | ret = RTN_UNICAST; |
03cf786c | 191 | if (!local_table->tb_lookup(local_table, &fl, &res)) { |
05538116 LAT |
192 | if (!dev || dev == res.fi->fib_dev) |
193 | ret = res.type; | |
1da177e4 LT |
194 | fib_res_put(&res); |
195 | } | |
196 | } | |
197 | return ret; | |
198 | } | |
199 | ||
6b175b26 | 200 | unsigned int inet_addr_type(struct net *net, __be32 addr) |
05538116 | 201 | { |
6b175b26 | 202 | return __inet_dev_addr_type(net, NULL, addr); |
05538116 LAT |
203 | } |
204 | ||
6b175b26 EB |
205 | unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev, |
206 | __be32 addr) | |
05538116 | 207 | { |
6b175b26 | 208 | return __inet_dev_addr_type(net, dev, addr); |
05538116 LAT |
209 | } |
210 | ||
1da177e4 LT |
211 | /* Given (packet source, input interface) and optional (dst, oif, tos): |
212 | - (main) check, that source is valid i.e. not broadcast or our local | |
213 | address. | |
214 | - figure out what "logical" interface this packet arrived | |
215 | and calculate "specific destination" address. | |
216 | - check, that packet arrived from expected physical interface. | |
217 | */ | |
218 | ||
d9c9df8c AV |
219 | int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif, |
220 | struct net_device *dev, __be32 *spec_dst, u32 *itag) | |
1da177e4 LT |
221 | { |
222 | struct in_device *in_dev; | |
223 | struct flowi fl = { .nl_u = { .ip4_u = | |
224 | { .daddr = src, | |
225 | .saddr = dst, | |
226 | .tos = tos } }, | |
227 | .iif = oif }; | |
228 | struct fib_result res; | |
229 | int no_addr, rpf; | |
230 | int ret; | |
231 | ||
232 | no_addr = rpf = 0; | |
233 | rcu_read_lock(); | |
e5ed6399 | 234 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
235 | if (in_dev) { |
236 | no_addr = in_dev->ifa_list == NULL; | |
237 | rpf = IN_DEV_RPFILTER(in_dev); | |
238 | } | |
239 | rcu_read_unlock(); | |
240 | ||
241 | if (in_dev == NULL) | |
242 | goto e_inval; | |
243 | ||
244 | if (fib_lookup(&fl, &res)) | |
245 | goto last_resort; | |
246 | if (res.type != RTN_UNICAST) | |
247 | goto e_inval_res; | |
248 | *spec_dst = FIB_RES_PREFSRC(res); | |
249 | fib_combine_itag(itag, &res); | |
250 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
251 | if (FIB_RES_DEV(res) == dev || res.fi->fib_nhs > 1) | |
252 | #else | |
253 | if (FIB_RES_DEV(res) == dev) | |
254 | #endif | |
255 | { | |
256 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
257 | fib_res_put(&res); | |
258 | return ret; | |
259 | } | |
260 | fib_res_put(&res); | |
261 | if (no_addr) | |
262 | goto last_resort; | |
263 | if (rpf) | |
264 | goto e_inval; | |
265 | fl.oif = dev->ifindex; | |
266 | ||
267 | ret = 0; | |
268 | if (fib_lookup(&fl, &res) == 0) { | |
269 | if (res.type == RTN_UNICAST) { | |
270 | *spec_dst = FIB_RES_PREFSRC(res); | |
271 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
272 | } | |
273 | fib_res_put(&res); | |
274 | } | |
275 | return ret; | |
276 | ||
277 | last_resort: | |
278 | if (rpf) | |
279 | goto e_inval; | |
280 | *spec_dst = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE); | |
281 | *itag = 0; | |
282 | return 0; | |
283 | ||
284 | e_inval_res: | |
285 | fib_res_put(&res); | |
286 | e_inval: | |
287 | return -EINVAL; | |
288 | } | |
289 | ||
81f7bf6c | 290 | static inline __be32 sk_extract_addr(struct sockaddr *addr) |
4e902c57 TG |
291 | { |
292 | return ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
293 | } | |
294 | ||
295 | static int put_rtax(struct nlattr *mx, int len, int type, u32 value) | |
296 | { | |
297 | struct nlattr *nla; | |
298 | ||
299 | nla = (struct nlattr *) ((char *) mx + len); | |
300 | nla->nla_type = type; | |
301 | nla->nla_len = nla_attr_size(4); | |
302 | *(u32 *) nla_data(nla) = value; | |
303 | ||
304 | return len + nla_total_size(4); | |
305 | } | |
306 | ||
4b5d47d4 | 307 | static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt, |
4e902c57 TG |
308 | struct fib_config *cfg) |
309 | { | |
6d85c10a | 310 | __be32 addr; |
4e902c57 TG |
311 | int plen; |
312 | ||
313 | memset(cfg, 0, sizeof(*cfg)); | |
4b5d47d4 | 314 | cfg->fc_nlinfo.nl_net = net; |
4e902c57 TG |
315 | |
316 | if (rt->rt_dst.sa_family != AF_INET) | |
317 | return -EAFNOSUPPORT; | |
318 | ||
319 | /* | |
320 | * Check mask for validity: | |
321 | * a) it must be contiguous. | |
322 | * b) destination must have all host bits clear. | |
323 | * c) if application forgot to set correct family (AF_INET), | |
324 | * reject request unless it is absolutely clear i.e. | |
325 | * both family and mask are zero. | |
326 | */ | |
327 | plen = 32; | |
328 | addr = sk_extract_addr(&rt->rt_dst); | |
329 | if (!(rt->rt_flags & RTF_HOST)) { | |
81f7bf6c | 330 | __be32 mask = sk_extract_addr(&rt->rt_genmask); |
4e902c57 TG |
331 | |
332 | if (rt->rt_genmask.sa_family != AF_INET) { | |
333 | if (mask || rt->rt_genmask.sa_family) | |
334 | return -EAFNOSUPPORT; | |
335 | } | |
336 | ||
337 | if (bad_mask(mask, addr)) | |
338 | return -EINVAL; | |
339 | ||
340 | plen = inet_mask_len(mask); | |
341 | } | |
342 | ||
343 | cfg->fc_dst_len = plen; | |
344 | cfg->fc_dst = addr; | |
345 | ||
346 | if (cmd != SIOCDELRT) { | |
347 | cfg->fc_nlflags = NLM_F_CREATE; | |
348 | cfg->fc_protocol = RTPROT_BOOT; | |
349 | } | |
350 | ||
351 | if (rt->rt_metric) | |
352 | cfg->fc_priority = rt->rt_metric - 1; | |
353 | ||
354 | if (rt->rt_flags & RTF_REJECT) { | |
355 | cfg->fc_scope = RT_SCOPE_HOST; | |
356 | cfg->fc_type = RTN_UNREACHABLE; | |
357 | return 0; | |
358 | } | |
359 | ||
360 | cfg->fc_scope = RT_SCOPE_NOWHERE; | |
361 | cfg->fc_type = RTN_UNICAST; | |
362 | ||
363 | if (rt->rt_dev) { | |
364 | char *colon; | |
365 | struct net_device *dev; | |
366 | char devname[IFNAMSIZ]; | |
367 | ||
368 | if (copy_from_user(devname, rt->rt_dev, IFNAMSIZ-1)) | |
369 | return -EFAULT; | |
370 | ||
371 | devname[IFNAMSIZ-1] = 0; | |
372 | colon = strchr(devname, ':'); | |
373 | if (colon) | |
374 | *colon = 0; | |
4b5d47d4 | 375 | dev = __dev_get_by_name(net, devname); |
4e902c57 TG |
376 | if (!dev) |
377 | return -ENODEV; | |
378 | cfg->fc_oif = dev->ifindex; | |
379 | if (colon) { | |
380 | struct in_ifaddr *ifa; | |
381 | struct in_device *in_dev = __in_dev_get_rtnl(dev); | |
382 | if (!in_dev) | |
383 | return -ENODEV; | |
384 | *colon = ':'; | |
385 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) | |
386 | if (strcmp(ifa->ifa_label, devname) == 0) | |
387 | break; | |
388 | if (ifa == NULL) | |
389 | return -ENODEV; | |
390 | cfg->fc_prefsrc = ifa->ifa_local; | |
391 | } | |
392 | } | |
393 | ||
394 | addr = sk_extract_addr(&rt->rt_gateway); | |
395 | if (rt->rt_gateway.sa_family == AF_INET && addr) { | |
396 | cfg->fc_gw = addr; | |
397 | if (rt->rt_flags & RTF_GATEWAY && | |
4b5d47d4 | 398 | inet_addr_type(net, addr) == RTN_UNICAST) |
4e902c57 TG |
399 | cfg->fc_scope = RT_SCOPE_UNIVERSE; |
400 | } | |
401 | ||
402 | if (cmd == SIOCDELRT) | |
403 | return 0; | |
404 | ||
405 | if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw) | |
406 | return -EINVAL; | |
407 | ||
408 | if (cfg->fc_scope == RT_SCOPE_NOWHERE) | |
409 | cfg->fc_scope = RT_SCOPE_LINK; | |
410 | ||
411 | if (rt->rt_flags & (RTF_MTU | RTF_WINDOW | RTF_IRTT)) { | |
412 | struct nlattr *mx; | |
413 | int len = 0; | |
414 | ||
415 | mx = kzalloc(3 * nla_total_size(4), GFP_KERNEL); | |
e905a9ed | 416 | if (mx == NULL) |
4e902c57 TG |
417 | return -ENOMEM; |
418 | ||
419 | if (rt->rt_flags & RTF_MTU) | |
420 | len = put_rtax(mx, len, RTAX_ADVMSS, rt->rt_mtu - 40); | |
421 | ||
422 | if (rt->rt_flags & RTF_WINDOW) | |
423 | len = put_rtax(mx, len, RTAX_WINDOW, rt->rt_window); | |
424 | ||
425 | if (rt->rt_flags & RTF_IRTT) | |
426 | len = put_rtax(mx, len, RTAX_RTT, rt->rt_irtt << 3); | |
427 | ||
428 | cfg->fc_mx = mx; | |
429 | cfg->fc_mx_len = len; | |
430 | } | |
431 | ||
432 | return 0; | |
433 | } | |
434 | ||
1da177e4 LT |
435 | /* |
436 | * Handle IP routing ioctl calls. These are used to manipulate the routing tables | |
437 | */ | |
e905a9ed | 438 | |
1bad118a | 439 | int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
1da177e4 | 440 | { |
4e902c57 TG |
441 | struct fib_config cfg; |
442 | struct rtentry rt; | |
1da177e4 | 443 | int err; |
1da177e4 LT |
444 | |
445 | switch (cmd) { | |
446 | case SIOCADDRT: /* Add a route */ | |
447 | case SIOCDELRT: /* Delete a route */ | |
448 | if (!capable(CAP_NET_ADMIN)) | |
449 | return -EPERM; | |
4e902c57 TG |
450 | |
451 | if (copy_from_user(&rt, arg, sizeof(rt))) | |
1da177e4 | 452 | return -EFAULT; |
4e902c57 | 453 | |
1da177e4 | 454 | rtnl_lock(); |
1bad118a | 455 | err = rtentry_to_fib_config(net, cmd, &rt, &cfg); |
1da177e4 | 456 | if (err == 0) { |
4e902c57 TG |
457 | struct fib_table *tb; |
458 | ||
1da177e4 | 459 | if (cmd == SIOCDELRT) { |
1bad118a | 460 | tb = fib_get_table(net, cfg.fc_table); |
1da177e4 | 461 | if (tb) |
4e902c57 TG |
462 | err = tb->tb_delete(tb, &cfg); |
463 | else | |
464 | err = -ESRCH; | |
1da177e4 | 465 | } else { |
1bad118a | 466 | tb = fib_new_table(net, cfg.fc_table); |
1da177e4 | 467 | if (tb) |
4e902c57 TG |
468 | err = tb->tb_insert(tb, &cfg); |
469 | else | |
470 | err = -ENOBUFS; | |
1da177e4 | 471 | } |
4e902c57 TG |
472 | |
473 | /* allocated by rtentry_to_fib_config() */ | |
474 | kfree(cfg.fc_mx); | |
1da177e4 LT |
475 | } |
476 | rtnl_unlock(); | |
477 | return err; | |
478 | } | |
479 | return -EINVAL; | |
480 | } | |
481 | ||
ef7c79ed | 482 | const struct nla_policy rtm_ipv4_policy[RTA_MAX+1] = { |
4e902c57 TG |
483 | [RTA_DST] = { .type = NLA_U32 }, |
484 | [RTA_SRC] = { .type = NLA_U32 }, | |
485 | [RTA_IIF] = { .type = NLA_U32 }, | |
486 | [RTA_OIF] = { .type = NLA_U32 }, | |
487 | [RTA_GATEWAY] = { .type = NLA_U32 }, | |
488 | [RTA_PRIORITY] = { .type = NLA_U32 }, | |
489 | [RTA_PREFSRC] = { .type = NLA_U32 }, | |
490 | [RTA_METRICS] = { .type = NLA_NESTED }, | |
5176f91e | 491 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
4e902c57 TG |
492 | [RTA_PROTOINFO] = { .type = NLA_U32 }, |
493 | [RTA_FLOW] = { .type = NLA_U32 }, | |
4e902c57 TG |
494 | }; |
495 | ||
4b5d47d4 DL |
496 | static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, |
497 | struct nlmsghdr *nlh, struct fib_config *cfg) | |
1da177e4 | 498 | { |
4e902c57 TG |
499 | struct nlattr *attr; |
500 | int err, remaining; | |
501 | struct rtmsg *rtm; | |
502 | ||
503 | err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy); | |
504 | if (err < 0) | |
505 | goto errout; | |
506 | ||
507 | memset(cfg, 0, sizeof(*cfg)); | |
508 | ||
509 | rtm = nlmsg_data(nlh); | |
4e902c57 | 510 | cfg->fc_dst_len = rtm->rtm_dst_len; |
4e902c57 TG |
511 | cfg->fc_tos = rtm->rtm_tos; |
512 | cfg->fc_table = rtm->rtm_table; | |
513 | cfg->fc_protocol = rtm->rtm_protocol; | |
514 | cfg->fc_scope = rtm->rtm_scope; | |
515 | cfg->fc_type = rtm->rtm_type; | |
516 | cfg->fc_flags = rtm->rtm_flags; | |
517 | cfg->fc_nlflags = nlh->nlmsg_flags; | |
518 | ||
519 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; | |
520 | cfg->fc_nlinfo.nlh = nlh; | |
4b5d47d4 | 521 | cfg->fc_nlinfo.nl_net = net; |
4e902c57 | 522 | |
a0ee18b9 TG |
523 | if (cfg->fc_type > RTN_MAX) { |
524 | err = -EINVAL; | |
525 | goto errout; | |
526 | } | |
527 | ||
4e902c57 | 528 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) { |
8f4c1f9b | 529 | switch (nla_type(attr)) { |
4e902c57 | 530 | case RTA_DST: |
17fb2c64 | 531 | cfg->fc_dst = nla_get_be32(attr); |
4e902c57 | 532 | break; |
4e902c57 TG |
533 | case RTA_OIF: |
534 | cfg->fc_oif = nla_get_u32(attr); | |
535 | break; | |
536 | case RTA_GATEWAY: | |
17fb2c64 | 537 | cfg->fc_gw = nla_get_be32(attr); |
4e902c57 TG |
538 | break; |
539 | case RTA_PRIORITY: | |
540 | cfg->fc_priority = nla_get_u32(attr); | |
541 | break; | |
542 | case RTA_PREFSRC: | |
17fb2c64 | 543 | cfg->fc_prefsrc = nla_get_be32(attr); |
4e902c57 TG |
544 | break; |
545 | case RTA_METRICS: | |
546 | cfg->fc_mx = nla_data(attr); | |
547 | cfg->fc_mx_len = nla_len(attr); | |
548 | break; | |
549 | case RTA_MULTIPATH: | |
550 | cfg->fc_mp = nla_data(attr); | |
551 | cfg->fc_mp_len = nla_len(attr); | |
552 | break; | |
553 | case RTA_FLOW: | |
554 | cfg->fc_flow = nla_get_u32(attr); | |
555 | break; | |
4e902c57 TG |
556 | case RTA_TABLE: |
557 | cfg->fc_table = nla_get_u32(attr); | |
558 | break; | |
1da177e4 LT |
559 | } |
560 | } | |
4e902c57 | 561 | |
1da177e4 | 562 | return 0; |
4e902c57 TG |
563 | errout: |
564 | return err; | |
1da177e4 LT |
565 | } |
566 | ||
63f3444f | 567 | static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 568 | { |
b854272b | 569 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
570 | struct fib_config cfg; |
571 | struct fib_table *tb; | |
572 | int err; | |
1da177e4 | 573 | |
4b5d47d4 | 574 | err = rtm_to_fib_config(net, skb, nlh, &cfg); |
4e902c57 TG |
575 | if (err < 0) |
576 | goto errout; | |
1da177e4 | 577 | |
8ad4942c | 578 | tb = fib_get_table(net, cfg.fc_table); |
4e902c57 TG |
579 | if (tb == NULL) { |
580 | err = -ESRCH; | |
581 | goto errout; | |
582 | } | |
583 | ||
584 | err = tb->tb_delete(tb, &cfg); | |
585 | errout: | |
586 | return err; | |
1da177e4 LT |
587 | } |
588 | ||
63f3444f | 589 | static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 590 | { |
b854272b | 591 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
592 | struct fib_config cfg; |
593 | struct fib_table *tb; | |
594 | int err; | |
1da177e4 | 595 | |
4b5d47d4 | 596 | err = rtm_to_fib_config(net, skb, nlh, &cfg); |
4e902c57 TG |
597 | if (err < 0) |
598 | goto errout; | |
1da177e4 | 599 | |
226b0b4a | 600 | tb = fib_new_table(net, cfg.fc_table); |
4e902c57 TG |
601 | if (tb == NULL) { |
602 | err = -ENOBUFS; | |
603 | goto errout; | |
604 | } | |
605 | ||
606 | err = tb->tb_insert(tb, &cfg); | |
607 | errout: | |
608 | return err; | |
1da177e4 LT |
609 | } |
610 | ||
63f3444f | 611 | static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 612 | { |
b854272b | 613 | struct net *net = skb->sk->sk_net; |
1af5a8c4 PM |
614 | unsigned int h, s_h; |
615 | unsigned int e = 0, s_e; | |
1da177e4 | 616 | struct fib_table *tb; |
1af5a8c4 | 617 | struct hlist_node *node; |
e4aef8ae | 618 | struct hlist_head *head; |
1af5a8c4 | 619 | int dumped = 0; |
1da177e4 | 620 | |
be403ea1 TG |
621 | if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) && |
622 | ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED) | |
1da177e4 LT |
623 | return ip_rt_dump(skb, cb); |
624 | ||
1af5a8c4 PM |
625 | s_h = cb->args[0]; |
626 | s_e = cb->args[1]; | |
627 | ||
628 | for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) { | |
629 | e = 0; | |
e4aef8ae DL |
630 | head = &net->ipv4.fib_table_hash[h]; |
631 | hlist_for_each_entry(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
632 | if (e < s_e) |
633 | goto next; | |
634 | if (dumped) | |
635 | memset(&cb->args[2], 0, sizeof(cb->args) - | |
e905a9ed | 636 | 2 * sizeof(cb->args[0])); |
1af5a8c4 PM |
637 | if (tb->tb_dump(tb, skb, cb) < 0) |
638 | goto out; | |
639 | dumped = 1; | |
640 | next: | |
641 | e++; | |
642 | } | |
1da177e4 | 643 | } |
1af5a8c4 PM |
644 | out: |
645 | cb->args[1] = e; | |
646 | cb->args[0] = h; | |
1da177e4 LT |
647 | |
648 | return skb->len; | |
649 | } | |
650 | ||
651 | /* Prepare and feed intra-kernel routing request. | |
652 | Really, it should be netlink message, but :-( netlink | |
653 | can be not configured, so that we feed it directly | |
654 | to fib engine. It is legal, because all events occur | |
655 | only when netlink is already locked. | |
656 | */ | |
657 | ||
81f7bf6c | 658 | static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa) |
1da177e4 | 659 | { |
4b5d47d4 | 660 | struct net *net = ifa->ifa_dev->dev->nd_net; |
4e902c57 TG |
661 | struct fib_table *tb; |
662 | struct fib_config cfg = { | |
663 | .fc_protocol = RTPROT_KERNEL, | |
664 | .fc_type = type, | |
665 | .fc_dst = dst, | |
666 | .fc_dst_len = dst_len, | |
667 | .fc_prefsrc = ifa->ifa_local, | |
668 | .fc_oif = ifa->ifa_dev->dev->ifindex, | |
669 | .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND, | |
4d1169c1 | 670 | .fc_nlinfo = { |
4b5d47d4 | 671 | .nl_net = net, |
4d1169c1 | 672 | }, |
4e902c57 | 673 | }; |
1da177e4 LT |
674 | |
675 | if (type == RTN_UNICAST) | |
4b5d47d4 | 676 | tb = fib_new_table(net, RT_TABLE_MAIN); |
1da177e4 | 677 | else |
4b5d47d4 | 678 | tb = fib_new_table(net, RT_TABLE_LOCAL); |
1da177e4 LT |
679 | |
680 | if (tb == NULL) | |
681 | return; | |
682 | ||
4e902c57 | 683 | cfg.fc_table = tb->tb_id; |
1da177e4 | 684 | |
4e902c57 TG |
685 | if (type != RTN_LOCAL) |
686 | cfg.fc_scope = RT_SCOPE_LINK; | |
687 | else | |
688 | cfg.fc_scope = RT_SCOPE_HOST; | |
1da177e4 LT |
689 | |
690 | if (cmd == RTM_NEWROUTE) | |
4e902c57 | 691 | tb->tb_insert(tb, &cfg); |
1da177e4 | 692 | else |
4e902c57 | 693 | tb->tb_delete(tb, &cfg); |
1da177e4 LT |
694 | } |
695 | ||
0ff60a45 | 696 | void fib_add_ifaddr(struct in_ifaddr *ifa) |
1da177e4 LT |
697 | { |
698 | struct in_device *in_dev = ifa->ifa_dev; | |
699 | struct net_device *dev = in_dev->dev; | |
700 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
701 | __be32 mask = ifa->ifa_mask; |
702 | __be32 addr = ifa->ifa_local; | |
703 | __be32 prefix = ifa->ifa_address&mask; | |
1da177e4 LT |
704 | |
705 | if (ifa->ifa_flags&IFA_F_SECONDARY) { | |
706 | prim = inet_ifa_byprefix(in_dev, prefix, mask); | |
707 | if (prim == NULL) { | |
a6db9010 | 708 | printk(KERN_WARNING "fib_add_ifaddr: bug: prim == NULL\n"); |
1da177e4 LT |
709 | return; |
710 | } | |
711 | } | |
712 | ||
713 | fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim); | |
714 | ||
715 | if (!(dev->flags&IFF_UP)) | |
716 | return; | |
717 | ||
718 | /* Add broadcast address, if it is explicitly assigned. */ | |
a144ea4b | 719 | if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF)) |
1da177e4 LT |
720 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); |
721 | ||
f97c1e0c | 722 | if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) && |
1da177e4 LT |
723 | (prefix != addr || ifa->ifa_prefixlen < 32)) { |
724 | fib_magic(RTM_NEWROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
725 | RTN_UNICAST, prefix, ifa->ifa_prefixlen, prim); | |
726 | ||
727 | /* Add network specific broadcasts, when it takes a sense */ | |
728 | if (ifa->ifa_prefixlen < 31) { | |
729 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim); | |
730 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix|~mask, 32, prim); | |
731 | } | |
732 | } | |
733 | } | |
734 | ||
735 | static void fib_del_ifaddr(struct in_ifaddr *ifa) | |
736 | { | |
737 | struct in_device *in_dev = ifa->ifa_dev; | |
738 | struct net_device *dev = in_dev->dev; | |
739 | struct in_ifaddr *ifa1; | |
740 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
741 | __be32 brd = ifa->ifa_address|~ifa->ifa_mask; |
742 | __be32 any = ifa->ifa_address&ifa->ifa_mask; | |
1da177e4 LT |
743 | #define LOCAL_OK 1 |
744 | #define BRD_OK 2 | |
745 | #define BRD0_OK 4 | |
746 | #define BRD1_OK 8 | |
747 | unsigned ok = 0; | |
748 | ||
749 | if (!(ifa->ifa_flags&IFA_F_SECONDARY)) | |
750 | fib_magic(RTM_DELROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
751 | RTN_UNICAST, any, ifa->ifa_prefixlen, prim); | |
752 | else { | |
753 | prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask); | |
754 | if (prim == NULL) { | |
a6db9010 | 755 | printk(KERN_WARNING "fib_del_ifaddr: bug: prim == NULL\n"); |
1da177e4 LT |
756 | return; |
757 | } | |
758 | } | |
759 | ||
760 | /* Deletion is more complicated than add. | |
761 | We should take care of not to delete too much :-) | |
762 | ||
763 | Scan address list to be sure that addresses are really gone. | |
764 | */ | |
765 | ||
766 | for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { | |
767 | if (ifa->ifa_local == ifa1->ifa_local) | |
768 | ok |= LOCAL_OK; | |
769 | if (ifa->ifa_broadcast == ifa1->ifa_broadcast) | |
770 | ok |= BRD_OK; | |
771 | if (brd == ifa1->ifa_broadcast) | |
772 | ok |= BRD1_OK; | |
773 | if (any == ifa1->ifa_broadcast) | |
774 | ok |= BRD0_OK; | |
775 | } | |
776 | ||
777 | if (!(ok&BRD_OK)) | |
778 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); | |
779 | if (!(ok&BRD1_OK)) | |
780 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim); | |
781 | if (!(ok&BRD0_OK)) | |
782 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim); | |
783 | if (!(ok&LOCAL_OK)) { | |
784 | fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim); | |
785 | ||
786 | /* Check, that this local address finally disappeared. */ | |
226b0b4a | 787 | if (inet_addr_type(dev->nd_net, ifa->ifa_local) != RTN_LOCAL) { |
1da177e4 LT |
788 | /* And the last, but not the least thing. |
789 | We must flush stray FIB entries. | |
790 | ||
791 | First of all, we scan fib_info list searching | |
792 | for stray nexthop entries, then ignite fib_flush. | |
793 | */ | |
794 | if (fib_sync_down(ifa->ifa_local, NULL, 0)) | |
226b0b4a | 795 | fib_flush(dev->nd_net); |
1da177e4 LT |
796 | } |
797 | } | |
798 | #undef LOCAL_OK | |
799 | #undef BRD_OK | |
800 | #undef BRD0_OK | |
801 | #undef BRD1_OK | |
802 | } | |
803 | ||
246955fe RO |
804 | static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb ) |
805 | { | |
e905a9ed | 806 | |
246955fe | 807 | struct fib_result res; |
5f300893 | 808 | struct flowi fl = { .mark = frn->fl_mark, |
47dcf0cb | 809 | .nl_u = { .ip4_u = { .daddr = frn->fl_addr, |
246955fe RO |
810 | .tos = frn->fl_tos, |
811 | .scope = frn->fl_scope } } }; | |
1194ed0a | 812 | |
912a41a4 SV |
813 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
814 | res.r = NULL; | |
815 | #endif | |
816 | ||
1194ed0a | 817 | frn->err = -ENOENT; |
246955fe RO |
818 | if (tb) { |
819 | local_bh_disable(); | |
820 | ||
821 | frn->tb_id = tb->tb_id; | |
822 | frn->err = tb->tb_lookup(tb, &fl, &res); | |
823 | ||
824 | if (!frn->err) { | |
825 | frn->prefixlen = res.prefixlen; | |
826 | frn->nh_sel = res.nh_sel; | |
827 | frn->type = res.type; | |
828 | frn->scope = res.scope; | |
1194ed0a | 829 | fib_res_put(&res); |
246955fe RO |
830 | } |
831 | local_bh_enable(); | |
832 | } | |
833 | } | |
834 | ||
28f7b036 | 835 | static void nl_fib_input(struct sk_buff *skb) |
246955fe | 836 | { |
6bd48fcf | 837 | struct net *net; |
246955fe | 838 | struct fib_result_nl *frn; |
28f7b036 | 839 | struct nlmsghdr *nlh; |
246955fe | 840 | struct fib_table *tb; |
28f7b036 | 841 | u32 pid; |
1194ed0a | 842 | |
6bd48fcf | 843 | net = skb->sk->sk_net; |
b529ccf2 | 844 | nlh = nlmsg_hdr(skb); |
ea86575e | 845 | if (skb->len < NLMSG_SPACE(0) || skb->len < nlh->nlmsg_len || |
d883a036 | 846 | nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*frn))) |
ea86575e | 847 | return; |
d883a036 DL |
848 | |
849 | skb = skb_clone(skb, GFP_KERNEL); | |
850 | if (skb == NULL) | |
851 | return; | |
852 | nlh = nlmsg_hdr(skb); | |
e905a9ed | 853 | |
246955fe | 854 | frn = (struct fib_result_nl *) NLMSG_DATA(nlh); |
6bd48fcf | 855 | tb = fib_get_table(net, frn->tb_id_in); |
246955fe RO |
856 | |
857 | nl_fib_lookup(frn, tb); | |
e905a9ed | 858 | |
1194ed0a | 859 | pid = NETLINK_CB(skb).pid; /* pid of sending process */ |
246955fe | 860 | NETLINK_CB(skb).pid = 0; /* from kernel */ |
ac6d439d | 861 | NETLINK_CB(skb).dst_group = 0; /* unicast */ |
6bd48fcf | 862 | netlink_unicast(net->ipv4.fibnl, skb, pid, MSG_DONTWAIT); |
e905a9ed | 863 | } |
246955fe | 864 | |
7b1a74fd | 865 | static int nl_fib_lookup_init(struct net *net) |
246955fe | 866 | { |
6bd48fcf DL |
867 | struct sock *sk; |
868 | sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0, | |
869 | nl_fib_input, NULL, THIS_MODULE); | |
870 | if (sk == NULL) | |
7b1a74fd | 871 | return -EAFNOSUPPORT; |
6bd48fcf | 872 | net->ipv4.fibnl = sk; |
7b1a74fd DL |
873 | return 0; |
874 | } | |
875 | ||
876 | static void nl_fib_lookup_exit(struct net *net) | |
877 | { | |
b7c6ba6e | 878 | netlink_kernel_release(net->ipv4.fibnl); |
775516bf | 879 | net->ipv4.fibnl = NULL; |
246955fe RO |
880 | } |
881 | ||
1da177e4 LT |
882 | static void fib_disable_ip(struct net_device *dev, int force) |
883 | { | |
884 | if (fib_sync_down(0, dev, force)) | |
226b0b4a | 885 | fib_flush(dev->nd_net); |
1da177e4 LT |
886 | rt_cache_flush(0); |
887 | arp_ifdown(dev); | |
888 | } | |
889 | ||
890 | static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
891 | { | |
892 | struct in_ifaddr *ifa = (struct in_ifaddr*)ptr; | |
893 | ||
894 | switch (event) { | |
895 | case NETDEV_UP: | |
896 | fib_add_ifaddr(ifa); | |
897 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
898 | fib_sync_up(ifa->ifa_dev->dev); | |
899 | #endif | |
900 | rt_cache_flush(-1); | |
901 | break; | |
902 | case NETDEV_DOWN: | |
903 | fib_del_ifaddr(ifa); | |
9fcc2e8a | 904 | if (ifa->ifa_dev->ifa_list == NULL) { |
1da177e4 LT |
905 | /* Last address was deleted from this interface. |
906 | Disable IP. | |
907 | */ | |
908 | fib_disable_ip(ifa->ifa_dev->dev, 1); | |
909 | } else { | |
910 | rt_cache_flush(-1); | |
911 | } | |
912 | break; | |
913 | } | |
914 | return NOTIFY_DONE; | |
915 | } | |
916 | ||
917 | static int fib_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
918 | { | |
919 | struct net_device *dev = ptr; | |
e5ed6399 | 920 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
921 | |
922 | if (event == NETDEV_UNREGISTER) { | |
923 | fib_disable_ip(dev, 2); | |
924 | return NOTIFY_DONE; | |
925 | } | |
926 | ||
927 | if (!in_dev) | |
928 | return NOTIFY_DONE; | |
929 | ||
930 | switch (event) { | |
931 | case NETDEV_UP: | |
932 | for_ifa(in_dev) { | |
933 | fib_add_ifaddr(ifa); | |
934 | } endfor_ifa(in_dev); | |
935 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
936 | fib_sync_up(dev); | |
937 | #endif | |
938 | rt_cache_flush(-1); | |
939 | break; | |
940 | case NETDEV_DOWN: | |
941 | fib_disable_ip(dev, 0); | |
942 | break; | |
943 | case NETDEV_CHANGEMTU: | |
944 | case NETDEV_CHANGE: | |
945 | rt_cache_flush(0); | |
946 | break; | |
947 | } | |
948 | return NOTIFY_DONE; | |
949 | } | |
950 | ||
951 | static struct notifier_block fib_inetaddr_notifier = { | |
952 | .notifier_call =fib_inetaddr_event, | |
953 | }; | |
954 | ||
955 | static struct notifier_block fib_netdev_notifier = { | |
956 | .notifier_call =fib_netdev_event, | |
957 | }; | |
958 | ||
7b1a74fd | 959 | static int __net_init ip_fib_net_init(struct net *net) |
1da177e4 | 960 | { |
1af5a8c4 PM |
961 | unsigned int i; |
962 | ||
e4aef8ae DL |
963 | net->ipv4.fib_table_hash = kzalloc( |
964 | sizeof(struct hlist_head)*FIB_TABLE_HASHSZ, GFP_KERNEL); | |
965 | if (net->ipv4.fib_table_hash == NULL) | |
966 | return -ENOMEM; | |
967 | ||
1af5a8c4 | 968 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) |
e4aef8ae | 969 | INIT_HLIST_HEAD(&net->ipv4.fib_table_hash[i]); |
c3e9a353 | 970 | |
7b1a74fd DL |
971 | return fib4_rules_init(net); |
972 | } | |
1da177e4 | 973 | |
7b1a74fd DL |
974 | static void __net_exit ip_fib_net_exit(struct net *net) |
975 | { | |
976 | unsigned int i; | |
977 | ||
978 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
979 | fib4_rules_exit(net); | |
980 | #endif | |
981 | ||
982 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) { | |
983 | struct fib_table *tb; | |
984 | struct hlist_head *head; | |
985 | struct hlist_node *node, *tmp; | |
63f3444f | 986 | |
e4aef8ae | 987 | head = &net->ipv4.fib_table_hash[i]; |
7b1a74fd DL |
988 | hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) { |
989 | hlist_del(node); | |
990 | tb->tb_flush(tb); | |
991 | kfree(tb); | |
992 | } | |
993 | } | |
e4aef8ae | 994 | kfree(net->ipv4.fib_table_hash); |
7b1a74fd DL |
995 | } |
996 | ||
997 | static int __net_init fib_net_init(struct net *net) | |
998 | { | |
999 | int error; | |
1000 | ||
7b1a74fd DL |
1001 | error = ip_fib_net_init(net); |
1002 | if (error < 0) | |
1003 | goto out; | |
1004 | error = nl_fib_lookup_init(net); | |
1005 | if (error < 0) | |
1006 | goto out_nlfl; | |
1007 | error = fib_proc_init(net); | |
1008 | if (error < 0) | |
1009 | goto out_proc; | |
1010 | out: | |
1011 | return error; | |
1012 | ||
1013 | out_proc: | |
1014 | nl_fib_lookup_exit(net); | |
1015 | out_nlfl: | |
1016 | ip_fib_net_exit(net); | |
1017 | goto out; | |
1018 | } | |
1019 | ||
1020 | static void __net_exit fib_net_exit(struct net *net) | |
1021 | { | |
1022 | fib_proc_exit(net); | |
1023 | nl_fib_lookup_exit(net); | |
1024 | ip_fib_net_exit(net); | |
1025 | } | |
1026 | ||
1027 | static struct pernet_operations fib_net_ops = { | |
1028 | .init = fib_net_init, | |
1029 | .exit = fib_net_exit, | |
1030 | }; | |
1031 | ||
1032 | void __init ip_fib_init(void) | |
1033 | { | |
63f3444f TG |
1034 | rtnl_register(PF_INET, RTM_NEWROUTE, inet_rtm_newroute, NULL); |
1035 | rtnl_register(PF_INET, RTM_DELROUTE, inet_rtm_delroute, NULL); | |
1036 | rtnl_register(PF_INET, RTM_GETROUTE, NULL, inet_dump_fib); | |
7b1a74fd DL |
1037 | |
1038 | register_pernet_subsys(&fib_net_ops); | |
1039 | register_netdevice_notifier(&fib_netdev_notifier); | |
1040 | register_inetaddr_notifier(&fib_inetaddr_notifier); | |
7f9b8052 SH |
1041 | |
1042 | fib_hash_init(); | |
1da177e4 LT |
1043 | } |
1044 | ||
1045 | EXPORT_SYMBOL(inet_addr_type); | |
05538116 | 1046 | EXPORT_SYMBOL(inet_dev_addr_type); |
a1e8733e | 1047 | EXPORT_SYMBOL(ip_dev_find); |