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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 | ||
56 | local_table = fib_hash_init(RT_TABLE_LOCAL); | |
57 | if (local_table == NULL) | |
dbb50165 DL |
58 | return -ENOMEM; |
59 | ||
93456b6d DL |
60 | main_table = fib_hash_init(RT_TABLE_MAIN); |
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; | |
1da177e4 LT |
86 | tb = fib_hash_init(id); |
87 | if (!tb) | |
88 | return NULL; | |
1af5a8c4 | 89 | h = id & (FIB_TABLE_HASHSZ - 1); |
e4aef8ae | 90 | hlist_add_head_rcu(&tb->tb_hlist, &net->ipv4.fib_table_hash[h]); |
1da177e4 LT |
91 | return tb; |
92 | } | |
93 | ||
8ad4942c | 94 | struct fib_table *fib_get_table(struct net *net, u32 id) |
1af5a8c4 PM |
95 | { |
96 | struct fib_table *tb; | |
97 | struct hlist_node *node; | |
e4aef8ae | 98 | struct hlist_head *head; |
1af5a8c4 | 99 | unsigned int h; |
1da177e4 | 100 | |
1af5a8c4 PM |
101 | if (id == 0) |
102 | id = RT_TABLE_MAIN; | |
103 | h = id & (FIB_TABLE_HASHSZ - 1); | |
e4aef8ae | 104 | |
1af5a8c4 | 105 | rcu_read_lock(); |
e4aef8ae DL |
106 | head = &net->ipv4.fib_table_hash[h]; |
107 | hlist_for_each_entry_rcu(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
108 | if (tb->tb_id == id) { |
109 | rcu_read_unlock(); | |
110 | return tb; | |
111 | } | |
112 | } | |
113 | rcu_read_unlock(); | |
114 | return NULL; | |
115 | } | |
1da177e4 LT |
116 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
117 | ||
e4aef8ae | 118 | static void fib_flush(struct net *net) |
1da177e4 LT |
119 | { |
120 | int flushed = 0; | |
1da177e4 | 121 | struct fib_table *tb; |
1af5a8c4 | 122 | struct hlist_node *node; |
e4aef8ae | 123 | struct hlist_head *head; |
1af5a8c4 | 124 | unsigned int h; |
1da177e4 | 125 | |
1af5a8c4 | 126 | for (h = 0; h < FIB_TABLE_HASHSZ; h++) { |
e4aef8ae DL |
127 | head = &net->ipv4.fib_table_hash[h]; |
128 | hlist_for_each_entry(tb, node, head, tb_hlist) | |
1af5a8c4 | 129 | flushed += tb->tb_flush(tb); |
1da177e4 | 130 | } |
1da177e4 LT |
131 | |
132 | if (flushed) | |
133 | rt_cache_flush(-1); | |
134 | } | |
135 | ||
136 | /* | |
137 | * Find the first device with a given source address. | |
138 | */ | |
139 | ||
60cad5da | 140 | struct net_device * ip_dev_find(__be32 addr) |
1da177e4 LT |
141 | { |
142 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
143 | struct fib_result res; | |
144 | struct net_device *dev = NULL; | |
03cf786c | 145 | struct fib_table *local_table; |
1da177e4 LT |
146 | |
147 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
148 | res.r = NULL; | |
149 | #endif | |
150 | ||
8ad4942c | 151 | local_table = fib_get_table(&init_net, RT_TABLE_LOCAL); |
03cf786c | 152 | if (!local_table || local_table->tb_lookup(local_table, &fl, &res)) |
1da177e4 LT |
153 | return NULL; |
154 | if (res.type != RTN_LOCAL) | |
155 | goto out; | |
156 | dev = FIB_RES_DEV(res); | |
157 | ||
158 | if (dev) | |
159 | dev_hold(dev); | |
160 | out: | |
161 | fib_res_put(&res); | |
162 | return dev; | |
163 | } | |
164 | ||
05538116 LAT |
165 | /* |
166 | * Find address type as if only "dev" was present in the system. If | |
167 | * on_dev is NULL then all interfaces are taken into consideration. | |
168 | */ | |
6b175b26 EB |
169 | static inline unsigned __inet_dev_addr_type(struct net *net, |
170 | const struct net_device *dev, | |
05538116 | 171 | __be32 addr) |
1da177e4 LT |
172 | { |
173 | struct flowi fl = { .nl_u = { .ip4_u = { .daddr = addr } } }; | |
174 | struct fib_result res; | |
175 | unsigned ret = RTN_BROADCAST; | |
03cf786c | 176 | struct fib_table *local_table; |
1da177e4 | 177 | |
f97c1e0c | 178 | if (ipv4_is_zeronet(addr) || ipv4_is_badclass(addr)) |
1da177e4 | 179 | return RTN_BROADCAST; |
f97c1e0c | 180 | if (ipv4_is_multicast(addr)) |
1da177e4 LT |
181 | return RTN_MULTICAST; |
182 | ||
183 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
184 | res.r = NULL; | |
185 | #endif | |
e905a9ed | 186 | |
6b175b26 | 187 | local_table = fib_get_table(net, RT_TABLE_LOCAL); |
03cf786c | 188 | if (local_table) { |
1da177e4 | 189 | ret = RTN_UNICAST; |
03cf786c | 190 | if (!local_table->tb_lookup(local_table, &fl, &res)) { |
05538116 LAT |
191 | if (!dev || dev == res.fi->fib_dev) |
192 | ret = res.type; | |
1da177e4 LT |
193 | fib_res_put(&res); |
194 | } | |
195 | } | |
196 | return ret; | |
197 | } | |
198 | ||
6b175b26 | 199 | unsigned int inet_addr_type(struct net *net, __be32 addr) |
05538116 | 200 | { |
6b175b26 | 201 | return __inet_dev_addr_type(net, NULL, addr); |
05538116 LAT |
202 | } |
203 | ||
6b175b26 EB |
204 | unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev, |
205 | __be32 addr) | |
05538116 | 206 | { |
6b175b26 | 207 | return __inet_dev_addr_type(net, dev, addr); |
05538116 LAT |
208 | } |
209 | ||
1da177e4 LT |
210 | /* Given (packet source, input interface) and optional (dst, oif, tos): |
211 | - (main) check, that source is valid i.e. not broadcast or our local | |
212 | address. | |
213 | - figure out what "logical" interface this packet arrived | |
214 | and calculate "specific destination" address. | |
215 | - check, that packet arrived from expected physical interface. | |
216 | */ | |
217 | ||
d9c9df8c AV |
218 | int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif, |
219 | struct net_device *dev, __be32 *spec_dst, u32 *itag) | |
1da177e4 LT |
220 | { |
221 | struct in_device *in_dev; | |
222 | struct flowi fl = { .nl_u = { .ip4_u = | |
223 | { .daddr = src, | |
224 | .saddr = dst, | |
225 | .tos = tos } }, | |
226 | .iif = oif }; | |
227 | struct fib_result res; | |
228 | int no_addr, rpf; | |
229 | int ret; | |
230 | ||
231 | no_addr = rpf = 0; | |
232 | rcu_read_lock(); | |
e5ed6399 | 233 | in_dev = __in_dev_get_rcu(dev); |
1da177e4 LT |
234 | if (in_dev) { |
235 | no_addr = in_dev->ifa_list == NULL; | |
236 | rpf = IN_DEV_RPFILTER(in_dev); | |
237 | } | |
238 | rcu_read_unlock(); | |
239 | ||
240 | if (in_dev == NULL) | |
241 | goto e_inval; | |
242 | ||
243 | if (fib_lookup(&fl, &res)) | |
244 | goto last_resort; | |
245 | if (res.type != RTN_UNICAST) | |
246 | goto e_inval_res; | |
247 | *spec_dst = FIB_RES_PREFSRC(res); | |
248 | fib_combine_itag(itag, &res); | |
249 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
250 | if (FIB_RES_DEV(res) == dev || res.fi->fib_nhs > 1) | |
251 | #else | |
252 | if (FIB_RES_DEV(res) == dev) | |
253 | #endif | |
254 | { | |
255 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
256 | fib_res_put(&res); | |
257 | return ret; | |
258 | } | |
259 | fib_res_put(&res); | |
260 | if (no_addr) | |
261 | goto last_resort; | |
262 | if (rpf) | |
263 | goto e_inval; | |
264 | fl.oif = dev->ifindex; | |
265 | ||
266 | ret = 0; | |
267 | if (fib_lookup(&fl, &res) == 0) { | |
268 | if (res.type == RTN_UNICAST) { | |
269 | *spec_dst = FIB_RES_PREFSRC(res); | |
270 | ret = FIB_RES_NH(res).nh_scope >= RT_SCOPE_HOST; | |
271 | } | |
272 | fib_res_put(&res); | |
273 | } | |
274 | return ret; | |
275 | ||
276 | last_resort: | |
277 | if (rpf) | |
278 | goto e_inval; | |
279 | *spec_dst = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE); | |
280 | *itag = 0; | |
281 | return 0; | |
282 | ||
283 | e_inval_res: | |
284 | fib_res_put(&res); | |
285 | e_inval: | |
286 | return -EINVAL; | |
287 | } | |
288 | ||
81f7bf6c | 289 | static inline __be32 sk_extract_addr(struct sockaddr *addr) |
4e902c57 TG |
290 | { |
291 | return ((struct sockaddr_in *) addr)->sin_addr.s_addr; | |
292 | } | |
293 | ||
294 | static int put_rtax(struct nlattr *mx, int len, int type, u32 value) | |
295 | { | |
296 | struct nlattr *nla; | |
297 | ||
298 | nla = (struct nlattr *) ((char *) mx + len); | |
299 | nla->nla_type = type; | |
300 | nla->nla_len = nla_attr_size(4); | |
301 | *(u32 *) nla_data(nla) = value; | |
302 | ||
303 | return len + nla_total_size(4); | |
304 | } | |
305 | ||
4b5d47d4 | 306 | static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt, |
4e902c57 TG |
307 | struct fib_config *cfg) |
308 | { | |
6d85c10a | 309 | __be32 addr; |
4e902c57 TG |
310 | int plen; |
311 | ||
312 | memset(cfg, 0, sizeof(*cfg)); | |
4b5d47d4 | 313 | cfg->fc_nlinfo.nl_net = net; |
4e902c57 TG |
314 | |
315 | if (rt->rt_dst.sa_family != AF_INET) | |
316 | return -EAFNOSUPPORT; | |
317 | ||
318 | /* | |
319 | * Check mask for validity: | |
320 | * a) it must be contiguous. | |
321 | * b) destination must have all host bits clear. | |
322 | * c) if application forgot to set correct family (AF_INET), | |
323 | * reject request unless it is absolutely clear i.e. | |
324 | * both family and mask are zero. | |
325 | */ | |
326 | plen = 32; | |
327 | addr = sk_extract_addr(&rt->rt_dst); | |
328 | if (!(rt->rt_flags & RTF_HOST)) { | |
81f7bf6c | 329 | __be32 mask = sk_extract_addr(&rt->rt_genmask); |
4e902c57 TG |
330 | |
331 | if (rt->rt_genmask.sa_family != AF_INET) { | |
332 | if (mask || rt->rt_genmask.sa_family) | |
333 | return -EAFNOSUPPORT; | |
334 | } | |
335 | ||
336 | if (bad_mask(mask, addr)) | |
337 | return -EINVAL; | |
338 | ||
339 | plen = inet_mask_len(mask); | |
340 | } | |
341 | ||
342 | cfg->fc_dst_len = plen; | |
343 | cfg->fc_dst = addr; | |
344 | ||
345 | if (cmd != SIOCDELRT) { | |
346 | cfg->fc_nlflags = NLM_F_CREATE; | |
347 | cfg->fc_protocol = RTPROT_BOOT; | |
348 | } | |
349 | ||
350 | if (rt->rt_metric) | |
351 | cfg->fc_priority = rt->rt_metric - 1; | |
352 | ||
353 | if (rt->rt_flags & RTF_REJECT) { | |
354 | cfg->fc_scope = RT_SCOPE_HOST; | |
355 | cfg->fc_type = RTN_UNREACHABLE; | |
356 | return 0; | |
357 | } | |
358 | ||
359 | cfg->fc_scope = RT_SCOPE_NOWHERE; | |
360 | cfg->fc_type = RTN_UNICAST; | |
361 | ||
362 | if (rt->rt_dev) { | |
363 | char *colon; | |
364 | struct net_device *dev; | |
365 | char devname[IFNAMSIZ]; | |
366 | ||
367 | if (copy_from_user(devname, rt->rt_dev, IFNAMSIZ-1)) | |
368 | return -EFAULT; | |
369 | ||
370 | devname[IFNAMSIZ-1] = 0; | |
371 | colon = strchr(devname, ':'); | |
372 | if (colon) | |
373 | *colon = 0; | |
4b5d47d4 | 374 | dev = __dev_get_by_name(net, devname); |
4e902c57 TG |
375 | if (!dev) |
376 | return -ENODEV; | |
377 | cfg->fc_oif = dev->ifindex; | |
378 | if (colon) { | |
379 | struct in_ifaddr *ifa; | |
380 | struct in_device *in_dev = __in_dev_get_rtnl(dev); | |
381 | if (!in_dev) | |
382 | return -ENODEV; | |
383 | *colon = ':'; | |
384 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) | |
385 | if (strcmp(ifa->ifa_label, devname) == 0) | |
386 | break; | |
387 | if (ifa == NULL) | |
388 | return -ENODEV; | |
389 | cfg->fc_prefsrc = ifa->ifa_local; | |
390 | } | |
391 | } | |
392 | ||
393 | addr = sk_extract_addr(&rt->rt_gateway); | |
394 | if (rt->rt_gateway.sa_family == AF_INET && addr) { | |
395 | cfg->fc_gw = addr; | |
396 | if (rt->rt_flags & RTF_GATEWAY && | |
4b5d47d4 | 397 | inet_addr_type(net, addr) == RTN_UNICAST) |
4e902c57 TG |
398 | cfg->fc_scope = RT_SCOPE_UNIVERSE; |
399 | } | |
400 | ||
401 | if (cmd == SIOCDELRT) | |
402 | return 0; | |
403 | ||
404 | if (rt->rt_flags & RTF_GATEWAY && !cfg->fc_gw) | |
405 | return -EINVAL; | |
406 | ||
407 | if (cfg->fc_scope == RT_SCOPE_NOWHERE) | |
408 | cfg->fc_scope = RT_SCOPE_LINK; | |
409 | ||
410 | if (rt->rt_flags & (RTF_MTU | RTF_WINDOW | RTF_IRTT)) { | |
411 | struct nlattr *mx; | |
412 | int len = 0; | |
413 | ||
414 | mx = kzalloc(3 * nla_total_size(4), GFP_KERNEL); | |
e905a9ed | 415 | if (mx == NULL) |
4e902c57 TG |
416 | return -ENOMEM; |
417 | ||
418 | if (rt->rt_flags & RTF_MTU) | |
419 | len = put_rtax(mx, len, RTAX_ADVMSS, rt->rt_mtu - 40); | |
420 | ||
421 | if (rt->rt_flags & RTF_WINDOW) | |
422 | len = put_rtax(mx, len, RTAX_WINDOW, rt->rt_window); | |
423 | ||
424 | if (rt->rt_flags & RTF_IRTT) | |
425 | len = put_rtax(mx, len, RTAX_RTT, rt->rt_irtt << 3); | |
426 | ||
427 | cfg->fc_mx = mx; | |
428 | cfg->fc_mx_len = len; | |
429 | } | |
430 | ||
431 | return 0; | |
432 | } | |
433 | ||
1da177e4 LT |
434 | /* |
435 | * Handle IP routing ioctl calls. These are used to manipulate the routing tables | |
436 | */ | |
e905a9ed | 437 | |
1bad118a | 438 | int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg) |
1da177e4 | 439 | { |
4e902c57 TG |
440 | struct fib_config cfg; |
441 | struct rtentry rt; | |
1da177e4 | 442 | int err; |
1da177e4 LT |
443 | |
444 | switch (cmd) { | |
445 | case SIOCADDRT: /* Add a route */ | |
446 | case SIOCDELRT: /* Delete a route */ | |
447 | if (!capable(CAP_NET_ADMIN)) | |
448 | return -EPERM; | |
4e902c57 TG |
449 | |
450 | if (copy_from_user(&rt, arg, sizeof(rt))) | |
1da177e4 | 451 | return -EFAULT; |
4e902c57 | 452 | |
1da177e4 | 453 | rtnl_lock(); |
1bad118a | 454 | err = rtentry_to_fib_config(net, cmd, &rt, &cfg); |
1da177e4 | 455 | if (err == 0) { |
4e902c57 TG |
456 | struct fib_table *tb; |
457 | ||
1da177e4 | 458 | if (cmd == SIOCDELRT) { |
1bad118a | 459 | tb = fib_get_table(net, cfg.fc_table); |
1da177e4 | 460 | if (tb) |
4e902c57 TG |
461 | err = tb->tb_delete(tb, &cfg); |
462 | else | |
463 | err = -ESRCH; | |
1da177e4 | 464 | } else { |
1bad118a | 465 | tb = fib_new_table(net, cfg.fc_table); |
1da177e4 | 466 | if (tb) |
4e902c57 TG |
467 | err = tb->tb_insert(tb, &cfg); |
468 | else | |
469 | err = -ENOBUFS; | |
1da177e4 | 470 | } |
4e902c57 TG |
471 | |
472 | /* allocated by rtentry_to_fib_config() */ | |
473 | kfree(cfg.fc_mx); | |
1da177e4 LT |
474 | } |
475 | rtnl_unlock(); | |
476 | return err; | |
477 | } | |
478 | return -EINVAL; | |
479 | } | |
480 | ||
ef7c79ed | 481 | const struct nla_policy rtm_ipv4_policy[RTA_MAX+1] = { |
4e902c57 TG |
482 | [RTA_DST] = { .type = NLA_U32 }, |
483 | [RTA_SRC] = { .type = NLA_U32 }, | |
484 | [RTA_IIF] = { .type = NLA_U32 }, | |
485 | [RTA_OIF] = { .type = NLA_U32 }, | |
486 | [RTA_GATEWAY] = { .type = NLA_U32 }, | |
487 | [RTA_PRIORITY] = { .type = NLA_U32 }, | |
488 | [RTA_PREFSRC] = { .type = NLA_U32 }, | |
489 | [RTA_METRICS] = { .type = NLA_NESTED }, | |
5176f91e | 490 | [RTA_MULTIPATH] = { .len = sizeof(struct rtnexthop) }, |
4e902c57 TG |
491 | [RTA_PROTOINFO] = { .type = NLA_U32 }, |
492 | [RTA_FLOW] = { .type = NLA_U32 }, | |
4e902c57 TG |
493 | }; |
494 | ||
4b5d47d4 DL |
495 | static int rtm_to_fib_config(struct net *net, struct sk_buff *skb, |
496 | struct nlmsghdr *nlh, struct fib_config *cfg) | |
1da177e4 | 497 | { |
4e902c57 TG |
498 | struct nlattr *attr; |
499 | int err, remaining; | |
500 | struct rtmsg *rtm; | |
501 | ||
502 | err = nlmsg_validate(nlh, sizeof(*rtm), RTA_MAX, rtm_ipv4_policy); | |
503 | if (err < 0) | |
504 | goto errout; | |
505 | ||
506 | memset(cfg, 0, sizeof(*cfg)); | |
507 | ||
508 | rtm = nlmsg_data(nlh); | |
4e902c57 | 509 | cfg->fc_dst_len = rtm->rtm_dst_len; |
4e902c57 TG |
510 | cfg->fc_tos = rtm->rtm_tos; |
511 | cfg->fc_table = rtm->rtm_table; | |
512 | cfg->fc_protocol = rtm->rtm_protocol; | |
513 | cfg->fc_scope = rtm->rtm_scope; | |
514 | cfg->fc_type = rtm->rtm_type; | |
515 | cfg->fc_flags = rtm->rtm_flags; | |
516 | cfg->fc_nlflags = nlh->nlmsg_flags; | |
517 | ||
518 | cfg->fc_nlinfo.pid = NETLINK_CB(skb).pid; | |
519 | cfg->fc_nlinfo.nlh = nlh; | |
4b5d47d4 | 520 | cfg->fc_nlinfo.nl_net = net; |
4e902c57 | 521 | |
a0ee18b9 TG |
522 | if (cfg->fc_type > RTN_MAX) { |
523 | err = -EINVAL; | |
524 | goto errout; | |
525 | } | |
526 | ||
4e902c57 | 527 | nlmsg_for_each_attr(attr, nlh, sizeof(struct rtmsg), remaining) { |
8f4c1f9b | 528 | switch (nla_type(attr)) { |
4e902c57 | 529 | case RTA_DST: |
17fb2c64 | 530 | cfg->fc_dst = nla_get_be32(attr); |
4e902c57 | 531 | break; |
4e902c57 TG |
532 | case RTA_OIF: |
533 | cfg->fc_oif = nla_get_u32(attr); | |
534 | break; | |
535 | case RTA_GATEWAY: | |
17fb2c64 | 536 | cfg->fc_gw = nla_get_be32(attr); |
4e902c57 TG |
537 | break; |
538 | case RTA_PRIORITY: | |
539 | cfg->fc_priority = nla_get_u32(attr); | |
540 | break; | |
541 | case RTA_PREFSRC: | |
17fb2c64 | 542 | cfg->fc_prefsrc = nla_get_be32(attr); |
4e902c57 TG |
543 | break; |
544 | case RTA_METRICS: | |
545 | cfg->fc_mx = nla_data(attr); | |
546 | cfg->fc_mx_len = nla_len(attr); | |
547 | break; | |
548 | case RTA_MULTIPATH: | |
549 | cfg->fc_mp = nla_data(attr); | |
550 | cfg->fc_mp_len = nla_len(attr); | |
551 | break; | |
552 | case RTA_FLOW: | |
553 | cfg->fc_flow = nla_get_u32(attr); | |
554 | break; | |
4e902c57 TG |
555 | case RTA_TABLE: |
556 | cfg->fc_table = nla_get_u32(attr); | |
557 | break; | |
1da177e4 LT |
558 | } |
559 | } | |
4e902c57 | 560 | |
1da177e4 | 561 | return 0; |
4e902c57 TG |
562 | errout: |
563 | return err; | |
1da177e4 LT |
564 | } |
565 | ||
63f3444f | 566 | static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 567 | { |
b854272b | 568 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
569 | struct fib_config cfg; |
570 | struct fib_table *tb; | |
571 | int err; | |
1da177e4 | 572 | |
4b5d47d4 | 573 | err = rtm_to_fib_config(net, skb, nlh, &cfg); |
4e902c57 TG |
574 | if (err < 0) |
575 | goto errout; | |
1da177e4 | 576 | |
8ad4942c | 577 | tb = fib_get_table(net, cfg.fc_table); |
4e902c57 TG |
578 | if (tb == NULL) { |
579 | err = -ESRCH; | |
580 | goto errout; | |
581 | } | |
582 | ||
583 | err = tb->tb_delete(tb, &cfg); | |
584 | errout: | |
585 | return err; | |
1da177e4 LT |
586 | } |
587 | ||
63f3444f | 588 | static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) |
1da177e4 | 589 | { |
b854272b | 590 | struct net *net = skb->sk->sk_net; |
4e902c57 TG |
591 | struct fib_config cfg; |
592 | struct fib_table *tb; | |
593 | int err; | |
1da177e4 | 594 | |
4b5d47d4 | 595 | err = rtm_to_fib_config(net, skb, nlh, &cfg); |
4e902c57 TG |
596 | if (err < 0) |
597 | goto errout; | |
1da177e4 | 598 | |
226b0b4a | 599 | tb = fib_new_table(net, cfg.fc_table); |
4e902c57 TG |
600 | if (tb == NULL) { |
601 | err = -ENOBUFS; | |
602 | goto errout; | |
603 | } | |
604 | ||
605 | err = tb->tb_insert(tb, &cfg); | |
606 | errout: | |
607 | return err; | |
1da177e4 LT |
608 | } |
609 | ||
63f3444f | 610 | static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb) |
1da177e4 | 611 | { |
b854272b | 612 | struct net *net = skb->sk->sk_net; |
1af5a8c4 PM |
613 | unsigned int h, s_h; |
614 | unsigned int e = 0, s_e; | |
1da177e4 | 615 | struct fib_table *tb; |
1af5a8c4 | 616 | struct hlist_node *node; |
e4aef8ae | 617 | struct hlist_head *head; |
1af5a8c4 | 618 | int dumped = 0; |
1da177e4 | 619 | |
be403ea1 TG |
620 | if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) && |
621 | ((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED) | |
1da177e4 LT |
622 | return ip_rt_dump(skb, cb); |
623 | ||
1af5a8c4 PM |
624 | s_h = cb->args[0]; |
625 | s_e = cb->args[1]; | |
626 | ||
627 | for (h = s_h; h < FIB_TABLE_HASHSZ; h++, s_e = 0) { | |
628 | e = 0; | |
e4aef8ae DL |
629 | head = &net->ipv4.fib_table_hash[h]; |
630 | hlist_for_each_entry(tb, node, head, tb_hlist) { | |
1af5a8c4 PM |
631 | if (e < s_e) |
632 | goto next; | |
633 | if (dumped) | |
634 | memset(&cb->args[2], 0, sizeof(cb->args) - | |
e905a9ed | 635 | 2 * sizeof(cb->args[0])); |
1af5a8c4 PM |
636 | if (tb->tb_dump(tb, skb, cb) < 0) |
637 | goto out; | |
638 | dumped = 1; | |
639 | next: | |
640 | e++; | |
641 | } | |
1da177e4 | 642 | } |
1af5a8c4 PM |
643 | out: |
644 | cb->args[1] = e; | |
645 | cb->args[0] = h; | |
1da177e4 LT |
646 | |
647 | return skb->len; | |
648 | } | |
649 | ||
650 | /* Prepare and feed intra-kernel routing request. | |
651 | Really, it should be netlink message, but :-( netlink | |
652 | can be not configured, so that we feed it directly | |
653 | to fib engine. It is legal, because all events occur | |
654 | only when netlink is already locked. | |
655 | */ | |
656 | ||
81f7bf6c | 657 | static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa) |
1da177e4 | 658 | { |
4b5d47d4 | 659 | struct net *net = ifa->ifa_dev->dev->nd_net; |
4e902c57 TG |
660 | struct fib_table *tb; |
661 | struct fib_config cfg = { | |
662 | .fc_protocol = RTPROT_KERNEL, | |
663 | .fc_type = type, | |
664 | .fc_dst = dst, | |
665 | .fc_dst_len = dst_len, | |
666 | .fc_prefsrc = ifa->ifa_local, | |
667 | .fc_oif = ifa->ifa_dev->dev->ifindex, | |
668 | .fc_nlflags = NLM_F_CREATE | NLM_F_APPEND, | |
4d1169c1 | 669 | .fc_nlinfo = { |
4b5d47d4 | 670 | .nl_net = net, |
4d1169c1 | 671 | }, |
4e902c57 | 672 | }; |
1da177e4 LT |
673 | |
674 | if (type == RTN_UNICAST) | |
4b5d47d4 | 675 | tb = fib_new_table(net, RT_TABLE_MAIN); |
1da177e4 | 676 | else |
4b5d47d4 | 677 | tb = fib_new_table(net, RT_TABLE_LOCAL); |
1da177e4 LT |
678 | |
679 | if (tb == NULL) | |
680 | return; | |
681 | ||
4e902c57 | 682 | cfg.fc_table = tb->tb_id; |
1da177e4 | 683 | |
4e902c57 TG |
684 | if (type != RTN_LOCAL) |
685 | cfg.fc_scope = RT_SCOPE_LINK; | |
686 | else | |
687 | cfg.fc_scope = RT_SCOPE_HOST; | |
1da177e4 LT |
688 | |
689 | if (cmd == RTM_NEWROUTE) | |
4e902c57 | 690 | tb->tb_insert(tb, &cfg); |
1da177e4 | 691 | else |
4e902c57 | 692 | tb->tb_delete(tb, &cfg); |
1da177e4 LT |
693 | } |
694 | ||
0ff60a45 | 695 | void fib_add_ifaddr(struct in_ifaddr *ifa) |
1da177e4 LT |
696 | { |
697 | struct in_device *in_dev = ifa->ifa_dev; | |
698 | struct net_device *dev = in_dev->dev; | |
699 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
700 | __be32 mask = ifa->ifa_mask; |
701 | __be32 addr = ifa->ifa_local; | |
702 | __be32 prefix = ifa->ifa_address&mask; | |
1da177e4 LT |
703 | |
704 | if (ifa->ifa_flags&IFA_F_SECONDARY) { | |
705 | prim = inet_ifa_byprefix(in_dev, prefix, mask); | |
706 | if (prim == NULL) { | |
a6db9010 | 707 | printk(KERN_WARNING "fib_add_ifaddr: bug: prim == NULL\n"); |
1da177e4 LT |
708 | return; |
709 | } | |
710 | } | |
711 | ||
712 | fib_magic(RTM_NEWROUTE, RTN_LOCAL, addr, 32, prim); | |
713 | ||
714 | if (!(dev->flags&IFF_UP)) | |
715 | return; | |
716 | ||
717 | /* Add broadcast address, if it is explicitly assigned. */ | |
a144ea4b | 718 | if (ifa->ifa_broadcast && ifa->ifa_broadcast != htonl(0xFFFFFFFF)) |
1da177e4 LT |
719 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); |
720 | ||
f97c1e0c | 721 | if (!ipv4_is_zeronet(prefix) && !(ifa->ifa_flags&IFA_F_SECONDARY) && |
1da177e4 LT |
722 | (prefix != addr || ifa->ifa_prefixlen < 32)) { |
723 | fib_magic(RTM_NEWROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
724 | RTN_UNICAST, prefix, ifa->ifa_prefixlen, prim); | |
725 | ||
726 | /* Add network specific broadcasts, when it takes a sense */ | |
727 | if (ifa->ifa_prefixlen < 31) { | |
728 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix, 32, prim); | |
729 | fib_magic(RTM_NEWROUTE, RTN_BROADCAST, prefix|~mask, 32, prim); | |
730 | } | |
731 | } | |
732 | } | |
733 | ||
734 | static void fib_del_ifaddr(struct in_ifaddr *ifa) | |
735 | { | |
736 | struct in_device *in_dev = ifa->ifa_dev; | |
737 | struct net_device *dev = in_dev->dev; | |
738 | struct in_ifaddr *ifa1; | |
739 | struct in_ifaddr *prim = ifa; | |
a144ea4b AV |
740 | __be32 brd = ifa->ifa_address|~ifa->ifa_mask; |
741 | __be32 any = ifa->ifa_address&ifa->ifa_mask; | |
1da177e4 LT |
742 | #define LOCAL_OK 1 |
743 | #define BRD_OK 2 | |
744 | #define BRD0_OK 4 | |
745 | #define BRD1_OK 8 | |
746 | unsigned ok = 0; | |
747 | ||
748 | if (!(ifa->ifa_flags&IFA_F_SECONDARY)) | |
749 | fib_magic(RTM_DELROUTE, dev->flags&IFF_LOOPBACK ? RTN_LOCAL : | |
750 | RTN_UNICAST, any, ifa->ifa_prefixlen, prim); | |
751 | else { | |
752 | prim = inet_ifa_byprefix(in_dev, any, ifa->ifa_mask); | |
753 | if (prim == NULL) { | |
a6db9010 | 754 | printk(KERN_WARNING "fib_del_ifaddr: bug: prim == NULL\n"); |
1da177e4 LT |
755 | return; |
756 | } | |
757 | } | |
758 | ||
759 | /* Deletion is more complicated than add. | |
760 | We should take care of not to delete too much :-) | |
761 | ||
762 | Scan address list to be sure that addresses are really gone. | |
763 | */ | |
764 | ||
765 | for (ifa1 = in_dev->ifa_list; ifa1; ifa1 = ifa1->ifa_next) { | |
766 | if (ifa->ifa_local == ifa1->ifa_local) | |
767 | ok |= LOCAL_OK; | |
768 | if (ifa->ifa_broadcast == ifa1->ifa_broadcast) | |
769 | ok |= BRD_OK; | |
770 | if (brd == ifa1->ifa_broadcast) | |
771 | ok |= BRD1_OK; | |
772 | if (any == ifa1->ifa_broadcast) | |
773 | ok |= BRD0_OK; | |
774 | } | |
775 | ||
776 | if (!(ok&BRD_OK)) | |
777 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, ifa->ifa_broadcast, 32, prim); | |
778 | if (!(ok&BRD1_OK)) | |
779 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, brd, 32, prim); | |
780 | if (!(ok&BRD0_OK)) | |
781 | fib_magic(RTM_DELROUTE, RTN_BROADCAST, any, 32, prim); | |
782 | if (!(ok&LOCAL_OK)) { | |
783 | fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim); | |
784 | ||
785 | /* Check, that this local address finally disappeared. */ | |
226b0b4a | 786 | if (inet_addr_type(dev->nd_net, ifa->ifa_local) != RTN_LOCAL) { |
1da177e4 LT |
787 | /* And the last, but not the least thing. |
788 | We must flush stray FIB entries. | |
789 | ||
790 | First of all, we scan fib_info list searching | |
791 | for stray nexthop entries, then ignite fib_flush. | |
792 | */ | |
793 | if (fib_sync_down(ifa->ifa_local, NULL, 0)) | |
226b0b4a | 794 | fib_flush(dev->nd_net); |
1da177e4 LT |
795 | } |
796 | } | |
797 | #undef LOCAL_OK | |
798 | #undef BRD_OK | |
799 | #undef BRD0_OK | |
800 | #undef BRD1_OK | |
801 | } | |
802 | ||
246955fe RO |
803 | static void nl_fib_lookup(struct fib_result_nl *frn, struct fib_table *tb ) |
804 | { | |
e905a9ed | 805 | |
246955fe | 806 | struct fib_result res; |
5f300893 | 807 | struct flowi fl = { .mark = frn->fl_mark, |
47dcf0cb | 808 | .nl_u = { .ip4_u = { .daddr = frn->fl_addr, |
246955fe RO |
809 | .tos = frn->fl_tos, |
810 | .scope = frn->fl_scope } } }; | |
1194ed0a | 811 | |
912a41a4 SV |
812 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
813 | res.r = NULL; | |
814 | #endif | |
815 | ||
1194ed0a | 816 | frn->err = -ENOENT; |
246955fe RO |
817 | if (tb) { |
818 | local_bh_disable(); | |
819 | ||
820 | frn->tb_id = tb->tb_id; | |
821 | frn->err = tb->tb_lookup(tb, &fl, &res); | |
822 | ||
823 | if (!frn->err) { | |
824 | frn->prefixlen = res.prefixlen; | |
825 | frn->nh_sel = res.nh_sel; | |
826 | frn->type = res.type; | |
827 | frn->scope = res.scope; | |
1194ed0a | 828 | fib_res_put(&res); |
246955fe RO |
829 | } |
830 | local_bh_enable(); | |
831 | } | |
832 | } | |
833 | ||
28f7b036 | 834 | static void nl_fib_input(struct sk_buff *skb) |
246955fe | 835 | { |
6bd48fcf | 836 | struct net *net; |
246955fe | 837 | struct fib_result_nl *frn; |
28f7b036 | 838 | struct nlmsghdr *nlh; |
246955fe | 839 | struct fib_table *tb; |
28f7b036 | 840 | u32 pid; |
1194ed0a | 841 | |
6bd48fcf | 842 | net = skb->sk->sk_net; |
b529ccf2 | 843 | nlh = nlmsg_hdr(skb); |
ea86575e | 844 | if (skb->len < NLMSG_SPACE(0) || skb->len < nlh->nlmsg_len || |
d883a036 | 845 | nlh->nlmsg_len < NLMSG_LENGTH(sizeof(*frn))) |
ea86575e | 846 | return; |
d883a036 DL |
847 | |
848 | skb = skb_clone(skb, GFP_KERNEL); | |
849 | if (skb == NULL) | |
850 | return; | |
851 | nlh = nlmsg_hdr(skb); | |
e905a9ed | 852 | |
246955fe | 853 | frn = (struct fib_result_nl *) NLMSG_DATA(nlh); |
6bd48fcf | 854 | tb = fib_get_table(net, frn->tb_id_in); |
246955fe RO |
855 | |
856 | nl_fib_lookup(frn, tb); | |
e905a9ed | 857 | |
1194ed0a | 858 | pid = NETLINK_CB(skb).pid; /* pid of sending process */ |
246955fe | 859 | NETLINK_CB(skb).pid = 0; /* from kernel */ |
ac6d439d | 860 | NETLINK_CB(skb).dst_group = 0; /* unicast */ |
6bd48fcf | 861 | netlink_unicast(net->ipv4.fibnl, skb, pid, MSG_DONTWAIT); |
e905a9ed | 862 | } |
246955fe | 863 | |
7b1a74fd | 864 | static int nl_fib_lookup_init(struct net *net) |
246955fe | 865 | { |
6bd48fcf DL |
866 | struct sock *sk; |
867 | sk = netlink_kernel_create(net, NETLINK_FIB_LOOKUP, 0, | |
868 | nl_fib_input, NULL, THIS_MODULE); | |
869 | if (sk == NULL) | |
7b1a74fd | 870 | return -EAFNOSUPPORT; |
6bd48fcf DL |
871 | /* Don't hold an extra reference on the namespace */ |
872 | put_net(sk->sk_net); | |
873 | net->ipv4.fibnl = sk; | |
7b1a74fd DL |
874 | return 0; |
875 | } | |
876 | ||
877 | static void nl_fib_lookup_exit(struct net *net) | |
878 | { | |
6bd48fcf DL |
879 | /* At the last minute lie and say this is a socket for the |
880 | * initial network namespace. So the socket will be safe to free. | |
881 | */ | |
882 | net->ipv4.fibnl->sk_net = get_net(&init_net); | |
883 | sock_put(net->ipv4.fibnl); | |
246955fe RO |
884 | } |
885 | ||
1da177e4 LT |
886 | static void fib_disable_ip(struct net_device *dev, int force) |
887 | { | |
888 | if (fib_sync_down(0, dev, force)) | |
226b0b4a | 889 | fib_flush(dev->nd_net); |
1da177e4 LT |
890 | rt_cache_flush(0); |
891 | arp_ifdown(dev); | |
892 | } | |
893 | ||
894 | static int fib_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
895 | { | |
896 | struct in_ifaddr *ifa = (struct in_ifaddr*)ptr; | |
897 | ||
898 | switch (event) { | |
899 | case NETDEV_UP: | |
900 | fib_add_ifaddr(ifa); | |
901 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
902 | fib_sync_up(ifa->ifa_dev->dev); | |
903 | #endif | |
904 | rt_cache_flush(-1); | |
905 | break; | |
906 | case NETDEV_DOWN: | |
907 | fib_del_ifaddr(ifa); | |
9fcc2e8a | 908 | if (ifa->ifa_dev->ifa_list == NULL) { |
1da177e4 LT |
909 | /* Last address was deleted from this interface. |
910 | Disable IP. | |
911 | */ | |
912 | fib_disable_ip(ifa->ifa_dev->dev, 1); | |
913 | } else { | |
914 | rt_cache_flush(-1); | |
915 | } | |
916 | break; | |
917 | } | |
918 | return NOTIFY_DONE; | |
919 | } | |
920 | ||
921 | static int fib_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
922 | { | |
923 | struct net_device *dev = ptr; | |
e5ed6399 | 924 | struct in_device *in_dev = __in_dev_get_rtnl(dev); |
1da177e4 LT |
925 | |
926 | if (event == NETDEV_UNREGISTER) { | |
927 | fib_disable_ip(dev, 2); | |
928 | return NOTIFY_DONE; | |
929 | } | |
930 | ||
931 | if (!in_dev) | |
932 | return NOTIFY_DONE; | |
933 | ||
934 | switch (event) { | |
935 | case NETDEV_UP: | |
936 | for_ifa(in_dev) { | |
937 | fib_add_ifaddr(ifa); | |
938 | } endfor_ifa(in_dev); | |
939 | #ifdef CONFIG_IP_ROUTE_MULTIPATH | |
940 | fib_sync_up(dev); | |
941 | #endif | |
942 | rt_cache_flush(-1); | |
943 | break; | |
944 | case NETDEV_DOWN: | |
945 | fib_disable_ip(dev, 0); | |
946 | break; | |
947 | case NETDEV_CHANGEMTU: | |
948 | case NETDEV_CHANGE: | |
949 | rt_cache_flush(0); | |
950 | break; | |
951 | } | |
952 | return NOTIFY_DONE; | |
953 | } | |
954 | ||
955 | static struct notifier_block fib_inetaddr_notifier = { | |
956 | .notifier_call =fib_inetaddr_event, | |
957 | }; | |
958 | ||
959 | static struct notifier_block fib_netdev_notifier = { | |
960 | .notifier_call =fib_netdev_event, | |
961 | }; | |
962 | ||
7b1a74fd | 963 | static int __net_init ip_fib_net_init(struct net *net) |
1da177e4 | 964 | { |
1af5a8c4 PM |
965 | unsigned int i; |
966 | ||
e4aef8ae DL |
967 | net->ipv4.fib_table_hash = kzalloc( |
968 | sizeof(struct hlist_head)*FIB_TABLE_HASHSZ, GFP_KERNEL); | |
969 | if (net->ipv4.fib_table_hash == NULL) | |
970 | return -ENOMEM; | |
971 | ||
1af5a8c4 | 972 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) |
e4aef8ae | 973 | INIT_HLIST_HEAD(&net->ipv4.fib_table_hash[i]); |
c3e9a353 | 974 | |
7b1a74fd DL |
975 | return fib4_rules_init(net); |
976 | } | |
1da177e4 | 977 | |
7b1a74fd DL |
978 | static void __net_exit ip_fib_net_exit(struct net *net) |
979 | { | |
980 | unsigned int i; | |
981 | ||
982 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
983 | fib4_rules_exit(net); | |
984 | #endif | |
985 | ||
986 | for (i = 0; i < FIB_TABLE_HASHSZ; i++) { | |
987 | struct fib_table *tb; | |
988 | struct hlist_head *head; | |
989 | struct hlist_node *node, *tmp; | |
63f3444f | 990 | |
e4aef8ae | 991 | head = &net->ipv4.fib_table_hash[i]; |
7b1a74fd DL |
992 | hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) { |
993 | hlist_del(node); | |
994 | tb->tb_flush(tb); | |
995 | kfree(tb); | |
996 | } | |
997 | } | |
e4aef8ae | 998 | kfree(net->ipv4.fib_table_hash); |
7b1a74fd DL |
999 | } |
1000 | ||
1001 | static int __net_init fib_net_init(struct net *net) | |
1002 | { | |
1003 | int error; | |
1004 | ||
7b1a74fd DL |
1005 | error = ip_fib_net_init(net); |
1006 | if (error < 0) | |
1007 | goto out; | |
1008 | error = nl_fib_lookup_init(net); | |
1009 | if (error < 0) | |
1010 | goto out_nlfl; | |
1011 | error = fib_proc_init(net); | |
1012 | if (error < 0) | |
1013 | goto out_proc; | |
1014 | out: | |
1015 | return error; | |
1016 | ||
1017 | out_proc: | |
1018 | nl_fib_lookup_exit(net); | |
1019 | out_nlfl: | |
1020 | ip_fib_net_exit(net); | |
1021 | goto out; | |
1022 | } | |
1023 | ||
1024 | static void __net_exit fib_net_exit(struct net *net) | |
1025 | { | |
1026 | fib_proc_exit(net); | |
1027 | nl_fib_lookup_exit(net); | |
1028 | ip_fib_net_exit(net); | |
1029 | } | |
1030 | ||
1031 | static struct pernet_operations fib_net_ops = { | |
1032 | .init = fib_net_init, | |
1033 | .exit = fib_net_exit, | |
1034 | }; | |
1035 | ||
1036 | void __init ip_fib_init(void) | |
1037 | { | |
63f3444f TG |
1038 | rtnl_register(PF_INET, RTM_NEWROUTE, inet_rtm_newroute, NULL); |
1039 | rtnl_register(PF_INET, RTM_DELROUTE, inet_rtm_delroute, NULL); | |
1040 | rtnl_register(PF_INET, RTM_GETROUTE, NULL, inet_dump_fib); | |
7b1a74fd DL |
1041 | |
1042 | register_pernet_subsys(&fib_net_ops); | |
1043 | register_netdevice_notifier(&fib_netdev_notifier); | |
1044 | register_inetaddr_notifier(&fib_inetaddr_notifier); | |
1da177e4 LT |
1045 | } |
1046 | ||
1047 | EXPORT_SYMBOL(inet_addr_type); | |
05538116 | 1048 | EXPORT_SYMBOL(inet_dev_addr_type); |
a1e8733e | 1049 | EXPORT_SYMBOL(ip_dev_find); |