blob: 2e2fc3376ac99e876f2bfcad7d44188695c83034 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 FIB: lookup engine and maintenance routines.
7 *
8 * Version: $Id: fib_hash.c,v 1.13 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <asm/uaccess.h>
19#include <asm/system.h>
20#include <linux/bitops.h>
21#include <linux/types.h>
22#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/mm.h>
24#include <linux/string.h>
25#include <linux/socket.h>
26#include <linux/sockios.h>
27#include <linux/errno.h>
28#include <linux/in.h>
29#include <linux/inet.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020030#include <linux/inetdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/netdevice.h>
32#include <linux/if_arp.h>
33#include <linux/proc_fs.h>
34#include <linux/skbuff.h>
35#include <linux/netlink.h>
36#include <linux/init.h>
37
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020038#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <net/ip.h>
40#include <net/protocol.h>
41#include <net/route.h>
42#include <net/tcp.h>
43#include <net/sock.h>
44#include <net/ip_fib.h>
45
46#include "fib_lookup.h"
47
Christoph Lametere18b8902006-12-06 20:33:20 -080048static struct kmem_cache *fn_hash_kmem __read_mostly;
49static struct kmem_cache *fn_alias_kmem __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51struct fib_node {
52 struct hlist_node fn_hash;
53 struct list_head fn_alias;
Al Virob6e80c62006-09-26 22:20:01 -070054 __be32 fn_key;
Eric Dumazeta6501e02008-01-18 03:33:26 -080055 struct fib_alias fn_embedded_alias;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056};
57
58struct fn_zone {
59 struct fn_zone *fz_next; /* Next not empty zone */
60 struct hlist_head *fz_hash; /* Hash table pointer */
61 int fz_nent; /* Number of entries */
62
63 int fz_divisor; /* Hash divisor */
64 u32 fz_hashmask; /* (fz_divisor - 1) */
65#define FZ_HASHMASK(fz) ((fz)->fz_hashmask)
66
67 int fz_order; /* Zone order */
Al Virob6e80c62006-09-26 22:20:01 -070068 __be32 fz_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#define FZ_MASK(fz) ((fz)->fz_mask)
70};
71
72/* NOTE. On fast computers evaluation of fz_hashmask and fz_mask
73 * can be cheaper than memory lookup, so that FZ_* macros are used.
74 */
75
76struct fn_hash {
77 struct fn_zone *fn_zones[33];
78 struct fn_zone *fn_zone_list;
79};
80
Al Virob6e80c62006-09-26 22:20:01 -070081static inline u32 fn_hash(__be32 key, struct fn_zone *fz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082{
83 u32 h = ntohl(key)>>(32 - fz->fz_order);
84 h ^= (h>>20);
85 h ^= (h>>10);
86 h ^= (h>>5);
87 h &= FZ_HASHMASK(fz);
88 return h;
89}
90
Al Virob6e80c62006-09-26 22:20:01 -070091static inline __be32 fz_key(__be32 dst, struct fn_zone *fz)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092{
93 return dst & FZ_MASK(fz);
94}
95
96static DEFINE_RWLOCK(fib_hash_lock);
97static unsigned int fib_hash_genid;
98
99#define FZ_MAX_DIVISOR ((PAGE_SIZE<<MAX_ORDER) / sizeof(struct hlist_head))
100
101static struct hlist_head *fz_hash_alloc(int divisor)
102{
103 unsigned long size = divisor * sizeof(struct hlist_head);
104
105 if (size <= PAGE_SIZE) {
Joonwoo Park3015a342007-11-26 23:31:24 +0800106 return kzalloc(size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 } else {
108 return (struct hlist_head *)
Joonwoo Park3015a342007-11-26 23:31:24 +0800109 __get_free_pages(GFP_KERNEL | __GFP_ZERO, get_order(size));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 }
111}
112
113/* The fib hash lock must be held when this is called. */
114static inline void fn_rebuild_zone(struct fn_zone *fz,
115 struct hlist_head *old_ht,
116 int old_divisor)
117{
118 int i;
119
120 for (i = 0; i < old_divisor; i++) {
121 struct hlist_node *node, *n;
122 struct fib_node *f;
123
124 hlist_for_each_entry_safe(f, node, n, &old_ht[i], fn_hash) {
125 struct hlist_head *new_head;
126
127 hlist_del(&f->fn_hash);
128
129 new_head = &fz->fz_hash[fn_hash(f->fn_key, fz)];
130 hlist_add_head(&f->fn_hash, new_head);
131 }
132 }
133}
134
135static void fz_hash_free(struct hlist_head *hash, int divisor)
136{
137 unsigned long size = divisor * sizeof(struct hlist_head);
138
139 if (size <= PAGE_SIZE)
140 kfree(hash);
141 else
142 free_pages((unsigned long)hash, get_order(size));
143}
144
145static void fn_rehash_zone(struct fn_zone *fz)
146{
147 struct hlist_head *ht, *old_ht;
148 int old_divisor, new_divisor;
149 u32 new_hashmask;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 old_divisor = fz->fz_divisor;
152
153 switch (old_divisor) {
154 case 16:
155 new_divisor = 256;
156 break;
157 case 256:
158 new_divisor = 1024;
159 break;
160 default:
161 if ((old_divisor << 1) > FZ_MAX_DIVISOR) {
162 printk(KERN_CRIT "route.c: bad divisor %d!\n", old_divisor);
163 return;
164 }
165 new_divisor = (old_divisor << 1);
166 break;
167 }
168
169 new_hashmask = (new_divisor - 1);
170
171#if RT_CACHE_DEBUG >= 2
Stephen Hemmingera6db9012008-01-12 20:58:35 -0800172 printk(KERN_DEBUG "fn_rehash_zone: hash for zone %d grows from %d\n",
173 fz->fz_order, old_divisor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174#endif
175
176 ht = fz_hash_alloc(new_divisor);
177
178 if (ht) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 write_lock_bh(&fib_hash_lock);
180 old_ht = fz->fz_hash;
181 fz->fz_hash = ht;
182 fz->fz_hashmask = new_hashmask;
183 fz->fz_divisor = new_divisor;
184 fn_rebuild_zone(fz, old_ht, old_divisor);
185 fib_hash_genid++;
186 write_unlock_bh(&fib_hash_lock);
187
188 fz_hash_free(old_ht, old_divisor);
189 }
190}
191
192static inline void fn_free_node(struct fib_node * f)
193{
194 kmem_cache_free(fn_hash_kmem, f);
195}
196
Eric Dumazeta6501e02008-01-18 03:33:26 -0800197static inline void fn_free_alias(struct fib_alias *fa, struct fib_node *f)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198{
199 fib_release_info(fa->fa_info);
Eric Dumazeta6501e02008-01-18 03:33:26 -0800200 if (fa == &f->fn_embedded_alias)
201 fa->fa_info = NULL;
202 else
203 kmem_cache_free(fn_alias_kmem, fa);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204}
205
206static struct fn_zone *
207fn_new_zone(struct fn_hash *table, int z)
208{
209 int i;
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700210 struct fn_zone *fz = kzalloc(sizeof(struct fn_zone), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 if (!fz)
212 return NULL;
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 if (z) {
215 fz->fz_divisor = 16;
216 } else {
217 fz->fz_divisor = 1;
218 }
219 fz->fz_hashmask = (fz->fz_divisor - 1);
220 fz->fz_hash = fz_hash_alloc(fz->fz_divisor);
221 if (!fz->fz_hash) {
222 kfree(fz);
223 return NULL;
224 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 fz->fz_order = z;
226 fz->fz_mask = inet_make_mask(z);
227
228 /* Find the first not empty zone with more specific mask */
229 for (i=z+1; i<=32; i++)
230 if (table->fn_zones[i])
231 break;
232 write_lock_bh(&fib_hash_lock);
233 if (i>32) {
234 /* No more specific masks, we are the first. */
235 fz->fz_next = table->fn_zone_list;
236 table->fn_zone_list = fz;
237 } else {
238 fz->fz_next = table->fn_zones[i]->fz_next;
239 table->fn_zones[i]->fz_next = fz;
240 }
241 table->fn_zones[z] = fz;
242 fib_hash_genid++;
243 write_unlock_bh(&fib_hash_lock);
244 return fz;
245}
246
247static int
248fn_hash_lookup(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
249{
250 int err;
251 struct fn_zone *fz;
252 struct fn_hash *t = (struct fn_hash*)tb->tb_data;
253
254 read_lock(&fib_hash_lock);
255 for (fz = t->fn_zone_list; fz; fz = fz->fz_next) {
256 struct hlist_head *head;
257 struct hlist_node *node;
258 struct fib_node *f;
Al Virob6e80c62006-09-26 22:20:01 -0700259 __be32 k = fz_key(flp->fl4_dst, fz);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 head = &fz->fz_hash[fn_hash(k, fz)];
262 hlist_for_each_entry(f, node, head, fn_hash) {
263 if (f->fn_key != k)
264 continue;
265
266 err = fib_semantic_match(&f->fn_alias,
267 flp, res,
268 f->fn_key, fz->fz_mask,
269 fz->fz_order);
270 if (err <= 0)
271 goto out;
272 }
273 }
274 err = 1;
275out:
276 read_unlock(&fib_hash_lock);
277 return err;
278}
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280static void
281fn_hash_select_default(struct fib_table *tb, const struct flowi *flp, struct fib_result *res)
282{
283 int order, last_idx;
284 struct hlist_node *node;
285 struct fib_node *f;
286 struct fib_info *fi = NULL;
287 struct fib_info *last_resort;
288 struct fn_hash *t = (struct fn_hash*)tb->tb_data;
289 struct fn_zone *fz = t->fn_zones[0];
290
291 if (fz == NULL)
292 return;
293
294 last_idx = -1;
295 last_resort = NULL;
296 order = -1;
297
298 read_lock(&fib_hash_lock);
299 hlist_for_each_entry(f, node, &fz->fz_hash[0], fn_hash) {
300 struct fib_alias *fa;
301
302 list_for_each_entry(fa, &f->fn_alias, fa_list) {
303 struct fib_info *next_fi = fa->fa_info;
304
305 if (fa->fa_scope != res->scope ||
306 fa->fa_type != RTN_UNICAST)
307 continue;
308
309 if (next_fi->fib_priority > res->fi->fib_priority)
310 break;
311 if (!next_fi->fib_nh[0].nh_gw ||
312 next_fi->fib_nh[0].nh_scope != RT_SCOPE_LINK)
313 continue;
314 fa->fa_state |= FA_S_ACCESSED;
315
316 if (fi == NULL) {
317 if (next_fi != res->fi)
318 break;
319 } else if (!fib_detect_death(fi, order, &last_resort,
Denis V. Lunev971b8932007-12-08 00:32:23 -0800320 &last_idx, tb->tb_default)) {
Denis V. Luneva2bbe682007-12-08 00:31:44 -0800321 fib_result_assign(res, fi);
Denis V. Lunev971b8932007-12-08 00:32:23 -0800322 tb->tb_default = order;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 goto out;
324 }
325 fi = next_fi;
326 order++;
327 }
328 }
329
330 if (order <= 0 || fi == NULL) {
Denis V. Lunev971b8932007-12-08 00:32:23 -0800331 tb->tb_default = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 goto out;
333 }
334
Denis V. Lunev971b8932007-12-08 00:32:23 -0800335 if (!fib_detect_death(fi, order, &last_resort, &last_idx,
336 tb->tb_default)) {
Denis V. Luneva2bbe682007-12-08 00:31:44 -0800337 fib_result_assign(res, fi);
Denis V. Lunev971b8932007-12-08 00:32:23 -0800338 tb->tb_default = order;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 goto out;
340 }
341
Denis V. Luneva2bbe682007-12-08 00:31:44 -0800342 if (last_idx >= 0)
343 fib_result_assign(res, last_resort);
Denis V. Lunev971b8932007-12-08 00:32:23 -0800344 tb->tb_default = last_idx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345out:
346 read_unlock(&fib_hash_lock);
347}
348
349/* Insert node F to FZ. */
350static inline void fib_insert_node(struct fn_zone *fz, struct fib_node *f)
351{
352 struct hlist_head *head = &fz->fz_hash[fn_hash(f->fn_key, fz)];
353
354 hlist_add_head(&f->fn_hash, head);
355}
356
357/* Return the node in FZ matching KEY. */
Al Virob6e80c62006-09-26 22:20:01 -0700358static struct fib_node *fib_find_node(struct fn_zone *fz, __be32 key)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
360 struct hlist_head *head = &fz->fz_hash[fn_hash(key, fz)];
361 struct hlist_node *node;
362 struct fib_node *f;
363
364 hlist_for_each_entry(f, node, head, fn_hash) {
365 if (f->fn_key == key)
366 return f;
367 }
368
369 return NULL;
370}
371
Thomas Graf4e902c52006-08-17 18:14:52 -0700372static int fn_hash_insert(struct fib_table *tb, struct fib_config *cfg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
374 struct fn_hash *table = (struct fn_hash *) tb->tb_data;
Adrian Bunk94cb1502008-02-19 16:28:54 -0800375 struct fib_node *new_f = NULL;
376 struct fib_node *f;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 struct fib_alias *fa, *new_fa;
378 struct fn_zone *fz;
379 struct fib_info *fi;
Thomas Graf4e902c52006-08-17 18:14:52 -0700380 u8 tos = cfg->fc_tos;
Al Virob6e80c62006-09-26 22:20:01 -0700381 __be32 key;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 int err;
383
Thomas Graf4e902c52006-08-17 18:14:52 -0700384 if (cfg->fc_dst_len > 32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 return -EINVAL;
Thomas Graf4e902c52006-08-17 18:14:52 -0700386
387 fz = table->fn_zones[cfg->fc_dst_len];
388 if (!fz && !(fz = fn_new_zone(table, cfg->fc_dst_len)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 return -ENOBUFS;
390
391 key = 0;
Thomas Graf4e902c52006-08-17 18:14:52 -0700392 if (cfg->fc_dst) {
393 if (cfg->fc_dst & ~FZ_MASK(fz))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 return -EINVAL;
Thomas Graf4e902c52006-08-17 18:14:52 -0700395 key = fz_key(cfg->fc_dst, fz);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 }
397
Thomas Graf4e902c52006-08-17 18:14:52 -0700398 fi = fib_create_info(cfg);
399 if (IS_ERR(fi))
400 return PTR_ERR(fi);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
402 if (fz->fz_nent > (fz->fz_divisor<<1) &&
403 fz->fz_divisor < FZ_MAX_DIVISOR &&
Thomas Graf4e902c52006-08-17 18:14:52 -0700404 (cfg->fc_dst_len == 32 ||
405 (1 << cfg->fc_dst_len) > fz->fz_divisor))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 fn_rehash_zone(fz);
407
408 f = fib_find_node(fz, key);
409
410 if (!f)
411 fa = NULL;
412 else
413 fa = fib_find_alias(&f->fn_alias, tos, fi->fib_priority);
414
415 /* Now fa, if non-NULL, points to the first fib alias
416 * with the same keys [prefix,tos,priority], if such key already
417 * exists or to the node before which we will insert new one.
418 *
419 * If fa is NULL, we will need to allocate a new one and
420 * insert to the head of f.
421 *
422 * If f is NULL, no fib node matched the destination key
423 * and we need to allocate a new one of those as well.
424 */
425
426 if (fa && fa->fa_tos == tos &&
427 fa->fa_info->fib_priority == fi->fib_priority) {
Julian Anastasovc18865f2008-01-28 21:14:10 -0800428 struct fib_alias *fa_first, *fa_match;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
430 err = -EEXIST;
Thomas Graf4e902c52006-08-17 18:14:52 -0700431 if (cfg->fc_nlflags & NLM_F_EXCL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 goto out;
433
Julian Anastasovc18865f2008-01-28 21:14:10 -0800434 /* We have 2 goals:
435 * 1. Find exact match for type, scope, fib_info to avoid
436 * duplicate routes
437 * 2. Find next 'fa' (or head), NLM_F_APPEND inserts before it
438 */
439 fa_match = NULL;
440 fa_first = fa;
441 fa = list_entry(fa->fa_list.prev, struct fib_alias, fa_list);
442 list_for_each_entry_continue(fa, &f->fn_alias, fa_list) {
443 if (fa->fa_tos != tos)
444 break;
445 if (fa->fa_info->fib_priority != fi->fib_priority)
446 break;
447 if (fa->fa_type == cfg->fc_type &&
448 fa->fa_scope == cfg->fc_scope &&
449 fa->fa_info == fi) {
450 fa_match = fa;
451 break;
452 }
453 }
454
Thomas Graf4e902c52006-08-17 18:14:52 -0700455 if (cfg->fc_nlflags & NLM_F_REPLACE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 struct fib_info *fi_drop;
457 u8 state;
458
Julian Anastasovc18865f2008-01-28 21:14:10 -0800459 fa = fa_first;
460 if (fa_match) {
461 if (fa == fa_match)
462 err = 0;
Joonwoo Parkbd566e72008-01-18 03:44:48 -0800463 goto out;
Julian Anastasovc18865f2008-01-28 21:14:10 -0800464 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 write_lock_bh(&fib_hash_lock);
466 fi_drop = fa->fa_info;
467 fa->fa_info = fi;
Thomas Graf4e902c52006-08-17 18:14:52 -0700468 fa->fa_type = cfg->fc_type;
469 fa->fa_scope = cfg->fc_scope;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 state = fa->fa_state;
471 fa->fa_state &= ~FA_S_ACCESSED;
472 fib_hash_genid++;
473 write_unlock_bh(&fib_hash_lock);
474
475 fib_release_info(fi_drop);
476 if (state & FA_S_ACCESSED)
477 rt_cache_flush(-1);
Milan Kocianb8f55832007-05-23 14:55:06 -0700478 rtmsg_fib(RTM_NEWROUTE, key, fa, cfg->fc_dst_len, tb->tb_id,
479 &cfg->fc_nlinfo, NLM_F_REPLACE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 return 0;
481 }
482
483 /* Error if we find a perfect match which
484 * uses the same scope, type, and nexthop
485 * information.
486 */
Julian Anastasovc18865f2008-01-28 21:14:10 -0800487 if (fa_match)
488 goto out;
489
Thomas Graf4e902c52006-08-17 18:14:52 -0700490 if (!(cfg->fc_nlflags & NLM_F_APPEND))
Julian Anastasovc18865f2008-01-28 21:14:10 -0800491 fa = fa_first;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 }
493
494 err = -ENOENT;
Thomas Graf4e902c52006-08-17 18:14:52 -0700495 if (!(cfg->fc_nlflags & NLM_F_CREATE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 goto out;
497
498 err = -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 if (!f) {
Eric Dumazeta6501e02008-01-18 03:33:26 -0800501 new_f = kmem_cache_zalloc(fn_hash_kmem, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 if (new_f == NULL)
Eric Dumazeta6501e02008-01-18 03:33:26 -0800503 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504
505 INIT_HLIST_NODE(&new_f->fn_hash);
506 INIT_LIST_HEAD(&new_f->fn_alias);
507 new_f->fn_key = key;
508 f = new_f;
509 }
510
Eric Dumazeta6501e02008-01-18 03:33:26 -0800511 new_fa = &f->fn_embedded_alias;
512 if (new_fa->fa_info != NULL) {
513 new_fa = kmem_cache_alloc(fn_alias_kmem, GFP_KERNEL);
514 if (new_fa == NULL)
Adrian Bunk94cb1502008-02-19 16:28:54 -0800515 goto out;
Eric Dumazeta6501e02008-01-18 03:33:26 -0800516 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 new_fa->fa_info = fi;
518 new_fa->fa_tos = tos;
Thomas Graf4e902c52006-08-17 18:14:52 -0700519 new_fa->fa_type = cfg->fc_type;
520 new_fa->fa_scope = cfg->fc_scope;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 new_fa->fa_state = 0;
522
523 /*
524 * Insert new entry to the list.
525 */
526
527 write_lock_bh(&fib_hash_lock);
528 if (new_f)
529 fib_insert_node(fz, new_f);
530 list_add_tail(&new_fa->fa_list,
531 (fa ? &fa->fa_list : &f->fn_alias));
532 fib_hash_genid++;
533 write_unlock_bh(&fib_hash_lock);
534
535 if (new_f)
536 fz->fz_nent++;
537 rt_cache_flush(-1);
538
Thomas Graf4e902c52006-08-17 18:14:52 -0700539 rtmsg_fib(RTM_NEWROUTE, key, new_fa, cfg->fc_dst_len, tb->tb_id,
Milan Kocianb8f55832007-05-23 14:55:06 -0700540 &cfg->fc_nlinfo, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 return 0;
542
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543out:
Adrian Bunk94cb1502008-02-19 16:28:54 -0800544 if (new_f)
545 kmem_cache_free(fn_hash_kmem, new_f);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 fib_release_info(fi);
547 return err;
548}
549
550
Thomas Graf4e902c52006-08-17 18:14:52 -0700551static int fn_hash_delete(struct fib_table *tb, struct fib_config *cfg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552{
553 struct fn_hash *table = (struct fn_hash*)tb->tb_data;
554 struct fib_node *f;
555 struct fib_alias *fa, *fa_to_delete;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 struct fn_zone *fz;
Al Virob6e80c62006-09-26 22:20:01 -0700557 __be32 key;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Thomas Graf4e902c52006-08-17 18:14:52 -0700559 if (cfg->fc_dst_len > 32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 return -EINVAL;
Thomas Graf4e902c52006-08-17 18:14:52 -0700561
562 if ((fz = table->fn_zones[cfg->fc_dst_len]) == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 return -ESRCH;
564
565 key = 0;
Thomas Graf4e902c52006-08-17 18:14:52 -0700566 if (cfg->fc_dst) {
567 if (cfg->fc_dst & ~FZ_MASK(fz))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 return -EINVAL;
Thomas Graf4e902c52006-08-17 18:14:52 -0700569 key = fz_key(cfg->fc_dst, fz);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 }
571
572 f = fib_find_node(fz, key);
573
574 if (!f)
575 fa = NULL;
576 else
Thomas Graf4e902c52006-08-17 18:14:52 -0700577 fa = fib_find_alias(&f->fn_alias, cfg->fc_tos, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 if (!fa)
579 return -ESRCH;
580
581 fa_to_delete = NULL;
582 fa = list_entry(fa->fa_list.prev, struct fib_alias, fa_list);
583 list_for_each_entry_continue(fa, &f->fn_alias, fa_list) {
584 struct fib_info *fi = fa->fa_info;
585
Thomas Graf4e902c52006-08-17 18:14:52 -0700586 if (fa->fa_tos != cfg->fc_tos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 break;
588
Thomas Graf4e902c52006-08-17 18:14:52 -0700589 if ((!cfg->fc_type ||
590 fa->fa_type == cfg->fc_type) &&
591 (cfg->fc_scope == RT_SCOPE_NOWHERE ||
592 fa->fa_scope == cfg->fc_scope) &&
593 (!cfg->fc_protocol ||
594 fi->fib_protocol == cfg->fc_protocol) &&
595 fib_nh_match(cfg, fi) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 fa_to_delete = fa;
597 break;
598 }
599 }
600
601 if (fa_to_delete) {
602 int kill_fn;
603
604 fa = fa_to_delete;
Thomas Graf4e902c52006-08-17 18:14:52 -0700605 rtmsg_fib(RTM_DELROUTE, key, fa, cfg->fc_dst_len,
Milan Kocianb8f55832007-05-23 14:55:06 -0700606 tb->tb_id, &cfg->fc_nlinfo, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 kill_fn = 0;
609 write_lock_bh(&fib_hash_lock);
610 list_del(&fa->fa_list);
611 if (list_empty(&f->fn_alias)) {
612 hlist_del(&f->fn_hash);
613 kill_fn = 1;
614 }
615 fib_hash_genid++;
616 write_unlock_bh(&fib_hash_lock);
617
618 if (fa->fa_state & FA_S_ACCESSED)
619 rt_cache_flush(-1);
Eric Dumazeta6501e02008-01-18 03:33:26 -0800620 fn_free_alias(fa, f);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 if (kill_fn) {
622 fn_free_node(f);
623 fz->fz_nent--;
624 }
625
626 return 0;
627 }
628 return -ESRCH;
629}
630
631static int fn_flush_list(struct fn_zone *fz, int idx)
632{
633 struct hlist_head *head = &fz->fz_hash[idx];
634 struct hlist_node *node, *n;
635 struct fib_node *f;
636 int found = 0;
637
638 hlist_for_each_entry_safe(f, node, n, head, fn_hash) {
639 struct fib_alias *fa, *fa_node;
640 int kill_f;
641
642 kill_f = 0;
643 list_for_each_entry_safe(fa, fa_node, &f->fn_alias, fa_list) {
644 struct fib_info *fi = fa->fa_info;
645
646 if (fi && (fi->fib_flags&RTNH_F_DEAD)) {
647 write_lock_bh(&fib_hash_lock);
648 list_del(&fa->fa_list);
649 if (list_empty(&f->fn_alias)) {
650 hlist_del(&f->fn_hash);
651 kill_f = 1;
652 }
653 fib_hash_genid++;
654 write_unlock_bh(&fib_hash_lock);
655
Eric Dumazeta6501e02008-01-18 03:33:26 -0800656 fn_free_alias(fa, f);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 found++;
658 }
659 }
660 if (kill_f) {
661 fn_free_node(f);
662 fz->fz_nent--;
663 }
664 }
665 return found;
666}
667
668static int fn_hash_flush(struct fib_table *tb)
669{
670 struct fn_hash *table = (struct fn_hash *) tb->tb_data;
671 struct fn_zone *fz;
672 int found = 0;
673
674 for (fz = table->fn_zone_list; fz; fz = fz->fz_next) {
675 int i;
676
677 for (i = fz->fz_divisor - 1; i >= 0; i--)
678 found += fn_flush_list(fz, i);
679 }
680 return found;
681}
682
683
684static inline int
685fn_hash_dump_bucket(struct sk_buff *skb, struct netlink_callback *cb,
686 struct fib_table *tb,
687 struct fn_zone *fz,
688 struct hlist_head *head)
689{
690 struct hlist_node *node;
691 struct fib_node *f;
692 int i, s_i;
693
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700694 s_i = cb->args[4];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 i = 0;
696 hlist_for_each_entry(f, node, head, fn_hash) {
697 struct fib_alias *fa;
698
699 list_for_each_entry(fa, &f->fn_alias, fa_list) {
700 if (i < s_i)
701 goto next;
702
703 if (fib_dump_info(skb, NETLINK_CB(cb->skb).pid,
704 cb->nlh->nlmsg_seq,
705 RTM_NEWROUTE,
706 tb->tb_id,
707 fa->fa_type,
708 fa->fa_scope,
Thomas Grafbe403ea2006-08-17 18:15:17 -0700709 f->fn_key,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 fz->fz_order,
711 fa->fa_tos,
Jamal Hadi Salimb6544c02005-06-18 22:54:12 -0700712 fa->fa_info,
713 NLM_F_MULTI) < 0) {
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700714 cb->args[4] = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 return -1;
716 }
717 next:
718 i++;
719 }
720 }
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700721 cb->args[4] = i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 return skb->len;
723}
724
725static inline int
726fn_hash_dump_zone(struct sk_buff *skb, struct netlink_callback *cb,
727 struct fib_table *tb,
728 struct fn_zone *fz)
729{
730 int h, s_h;
731
Eric Dumazet8d3f0992008-01-18 04:30:21 -0800732 if (fz->fz_hash == NULL)
733 return skb->len;
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700734 s_h = cb->args[3];
Eric Dumazet8d3f0992008-01-18 04:30:21 -0800735 for (h = s_h; h < fz->fz_divisor; h++) {
736 if (hlist_empty(&fz->fz_hash[h]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 continue;
Eric Dumazet8d3f0992008-01-18 04:30:21 -0800738 if (fn_hash_dump_bucket(skb, cb, tb, fz, &fz->fz_hash[h]) < 0) {
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700739 cb->args[3] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 return -1;
741 }
Eric Dumazet8d3f0992008-01-18 04:30:21 -0800742 memset(&cb->args[4], 0,
743 sizeof(cb->args) - 4*sizeof(cb->args[0]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 }
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700745 cb->args[3] = h;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 return skb->len;
747}
748
749static int fn_hash_dump(struct fib_table *tb, struct sk_buff *skb, struct netlink_callback *cb)
750{
751 int m, s_m;
752 struct fn_zone *fz;
753 struct fn_hash *table = (struct fn_hash*)tb->tb_data;
754
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700755 s_m = cb->args[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 read_lock(&fib_hash_lock);
757 for (fz = table->fn_zone_list, m=0; fz; fz = fz->fz_next, m++) {
758 if (m < s_m) continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 if (fn_hash_dump_zone(skb, cb, tb, fz) < 0) {
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700760 cb->args[2] = m;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 read_unlock(&fib_hash_lock);
762 return -1;
763 }
Eric Dumazet8d3f0992008-01-18 04:30:21 -0800764 memset(&cb->args[3], 0,
765 sizeof(cb->args) - 3*sizeof(cb->args[0]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 }
767 read_unlock(&fib_hash_lock);
Patrick McHardy1af5a8c2006-08-10 23:10:46 -0700768 cb->args[2] = m;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 return skb->len;
770}
771
Stephen Hemminger7f9b8052008-01-14 23:14:20 -0800772void __init fib_hash_init(void)
773{
774 fn_hash_kmem = kmem_cache_create("ip_fib_hash", sizeof(struct fib_node),
Eric Dumazeta6501e02008-01-18 03:33:26 -0800775 0, SLAB_PANIC, NULL);
Stephen Hemminger7f9b8052008-01-14 23:14:20 -0800776
777 fn_alias_kmem = kmem_cache_create("ip_fib_alias", sizeof(struct fib_alias),
Eric Dumazeta6501e02008-01-18 03:33:26 -0800778 0, SLAB_PANIC, NULL);
Stephen Hemminger7f9b8052008-01-14 23:14:20 -0800779
780}
781
782struct fib_table *fib_hash_table(u32 id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783{
784 struct fib_table *tb;
785
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 tb = kmalloc(sizeof(struct fib_table) + sizeof(struct fn_hash),
787 GFP_KERNEL);
788 if (tb == NULL)
789 return NULL;
790
791 tb->tb_id = id;
Denis V. Lunev971b8932007-12-08 00:32:23 -0800792 tb->tb_default = -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793 tb->tb_lookup = fn_hash_lookup;
794 tb->tb_insert = fn_hash_insert;
795 tb->tb_delete = fn_hash_delete;
796 tb->tb_flush = fn_hash_flush;
797 tb->tb_select_default = fn_hash_select_default;
798 tb->tb_dump = fn_hash_dump;
799 memset(tb->tb_data, 0, sizeof(struct fn_hash));
800 return tb;
801}
802
803/* ------------------------------------------------------------------------ */
804#ifdef CONFIG_PROC_FS
805
806struct fib_iter_state {
Denis V. Lunev6e04d012008-01-10 03:26:50 -0800807 struct seq_net_private p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 struct fn_zone *zone;
809 int bucket;
810 struct hlist_head *hash_head;
811 struct fib_node *fn;
812 struct fib_alias *fa;
813 loff_t pos;
814 unsigned int genid;
815 int valid;
816};
817
818static struct fib_alias *fib_get_first(struct seq_file *seq)
819{
820 struct fib_iter_state *iter = seq->private;
Denis V. Lunev6e04d012008-01-10 03:26:50 -0800821 struct fib_table *main_table;
822 struct fn_hash *table;
823
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +0900824 main_table = fib_get_table(seq_file_net(seq), RT_TABLE_MAIN);
Denis V. Lunev6e04d012008-01-10 03:26:50 -0800825 table = (struct fn_hash *)main_table->tb_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
827 iter->bucket = 0;
828 iter->hash_head = NULL;
829 iter->fn = NULL;
830 iter->fa = NULL;
831 iter->pos = 0;
832 iter->genid = fib_hash_genid;
833 iter->valid = 1;
834
835 for (iter->zone = table->fn_zone_list; iter->zone;
836 iter->zone = iter->zone->fz_next) {
837 int maxslot;
838
839 if (!iter->zone->fz_nent)
840 continue;
841
842 iter->hash_head = iter->zone->fz_hash;
843 maxslot = iter->zone->fz_divisor;
844
845 for (iter->bucket = 0; iter->bucket < maxslot;
846 ++iter->bucket, ++iter->hash_head) {
847 struct hlist_node *node;
848 struct fib_node *fn;
849
850 hlist_for_each_entry(fn,node,iter->hash_head,fn_hash) {
851 struct fib_alias *fa;
852
853 list_for_each_entry(fa,&fn->fn_alias,fa_list) {
854 iter->fn = fn;
855 iter->fa = fa;
856 goto out;
857 }
858 }
859 }
860 }
861out:
862 return iter->fa;
863}
864
865static struct fib_alias *fib_get_next(struct seq_file *seq)
866{
867 struct fib_iter_state *iter = seq->private;
868 struct fib_node *fn;
869 struct fib_alias *fa;
870
871 /* Advance FA, if any. */
872 fn = iter->fn;
873 fa = iter->fa;
874 if (fa) {
875 BUG_ON(!fn);
876 list_for_each_entry_continue(fa, &fn->fn_alias, fa_list) {
877 iter->fa = fa;
878 goto out;
879 }
880 }
881
882 fa = iter->fa = NULL;
883
884 /* Advance FN. */
885 if (fn) {
886 struct hlist_node *node = &fn->fn_hash;
887 hlist_for_each_entry_continue(fn, node, fn_hash) {
888 iter->fn = fn;
889
890 list_for_each_entry(fa, &fn->fn_alias, fa_list) {
891 iter->fa = fa;
892 goto out;
893 }
894 }
895 }
896
897 fn = iter->fn = NULL;
898
899 /* Advance hash chain. */
900 if (!iter->zone)
901 goto out;
902
903 for (;;) {
904 struct hlist_node *node;
905 int maxslot;
906
907 maxslot = iter->zone->fz_divisor;
908
909 while (++iter->bucket < maxslot) {
910 iter->hash_head++;
911
912 hlist_for_each_entry(fn, node, iter->hash_head, fn_hash) {
913 list_for_each_entry(fa, &fn->fn_alias, fa_list) {
914 iter->fn = fn;
915 iter->fa = fa;
916 goto out;
917 }
918 }
919 }
920
921 iter->zone = iter->zone->fz_next;
922
923 if (!iter->zone)
924 goto out;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900925
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926 iter->bucket = 0;
927 iter->hash_head = iter->zone->fz_hash;
928
929 hlist_for_each_entry(fn, node, iter->hash_head, fn_hash) {
930 list_for_each_entry(fa, &fn->fn_alias, fa_list) {
931 iter->fn = fn;
932 iter->fa = fa;
933 goto out;
934 }
935 }
936 }
937out:
938 iter->pos++;
939 return fa;
940}
941
942static struct fib_alias *fib_get_idx(struct seq_file *seq, loff_t pos)
943{
944 struct fib_iter_state *iter = seq->private;
945 struct fib_alias *fa;
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900946
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 if (iter->valid && pos >= iter->pos && iter->genid == fib_hash_genid) {
948 fa = iter->fa;
949 pos -= iter->pos;
950 } else
951 fa = fib_get_first(seq);
952
953 if (fa)
954 while (pos && (fa = fib_get_next(seq)))
955 --pos;
956 return pos ? NULL : fa;
957}
958
959static void *fib_seq_start(struct seq_file *seq, loff_t *pos)
Eric Dumazet9a429c42008-01-01 21:58:02 -0800960 __acquires(fib_hash_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961{
962 void *v = NULL;
963
964 read_lock(&fib_hash_lock);
YOSHIFUJI Hideaki12188542008-03-26 02:36:06 +0900965 if (fib_get_table(seq_file_net(seq), RT_TABLE_MAIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 v = *pos ? fib_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
967 return v;
968}
969
970static void *fib_seq_next(struct seq_file *seq, void *v, loff_t *pos)
971{
972 ++*pos;
973 return v == SEQ_START_TOKEN ? fib_get_first(seq) : fib_get_next(seq);
974}
975
976static void fib_seq_stop(struct seq_file *seq, void *v)
Eric Dumazet9a429c42008-01-01 21:58:02 -0800977 __releases(fib_hash_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978{
979 read_unlock(&fib_hash_lock);
980}
981
Al Virob6e80c62006-09-26 22:20:01 -0700982static unsigned fib_flag_trans(int type, __be32 mask, struct fib_info *fi)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983{
Arjan van de Ven9b5b5cf2005-11-29 16:21:38 -0800984 static const unsigned type2flags[RTN_MAX + 1] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 [7] = RTF_REJECT, [8] = RTF_REJECT,
986 };
987 unsigned flags = type2flags[type];
988
989 if (fi && fi->fib_nh->nh_gw)
990 flags |= RTF_GATEWAY;
Al Virob6e80c62006-09-26 22:20:01 -0700991 if (mask == htonl(0xFFFFFFFF))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 flags |= RTF_HOST;
993 flags |= RTF_UP;
994 return flags;
995}
996
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900997/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 * This outputs /proc/net/route.
999 *
1000 * It always works in backward compatibility mode.
1001 * The format of the file is not supposed to be changed.
1002 */
1003static int fib_seq_show(struct seq_file *seq, void *v)
1004{
1005 struct fib_iter_state *iter;
Pavel Emelyanov5e659e42008-04-24 01:02:16 -07001006 int len;
Al Virob6e80c62006-09-26 22:20:01 -07001007 __be32 prefix, mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 unsigned flags;
1009 struct fib_node *f;
1010 struct fib_alias *fa;
1011 struct fib_info *fi;
1012
1013 if (v == SEQ_START_TOKEN) {
1014 seq_printf(seq, "%-127s\n", "Iface\tDestination\tGateway "
1015 "\tFlags\tRefCnt\tUse\tMetric\tMask\t\tMTU"
1016 "\tWindow\tIRTT");
1017 goto out;
1018 }
1019
1020 iter = seq->private;
1021 f = iter->fn;
1022 fa = iter->fa;
1023 fi = fa->fa_info;
1024 prefix = f->fn_key;
1025 mask = FZ_MASK(iter->zone);
1026 flags = fib_flag_trans(fa->fa_type, mask, fi);
1027 if (fi)
Pavel Emelyanov5e659e42008-04-24 01:02:16 -07001028 seq_printf(seq,
1029 "%s\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u%n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030 fi->fib_dev ? fi->fib_dev->name : "*", prefix,
1031 fi->fib_nh->nh_gw, flags, 0, 0, fi->fib_priority,
1032 mask, (fi->fib_advmss ? fi->fib_advmss + 40 : 0),
1033 fi->fib_window,
Pavel Emelyanov5e659e42008-04-24 01:02:16 -07001034 fi->fib_rtt >> 3, &len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 else
Pavel Emelyanov5e659e42008-04-24 01:02:16 -07001036 seq_printf(seq,
1037 "*\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u%n",
1038 prefix, 0, flags, 0, 0, 0, mask, 0, 0, 0, &len);
1039
1040 seq_printf(seq, "%*s\n", 127 - len, "");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041out:
1042 return 0;
1043}
1044
Stephen Hemmingerf6908082007-03-12 14:34:29 -07001045static const struct seq_operations fib_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 .start = fib_seq_start,
1047 .next = fib_seq_next,
1048 .stop = fib_seq_stop,
1049 .show = fib_seq_show,
1050};
1051
1052static int fib_seq_open(struct inode *inode, struct file *file)
1053{
Denis V. Lunev6e04d012008-01-10 03:26:50 -08001054 return seq_open_net(inode, file, &fib_seq_ops,
1055 sizeof(struct fib_iter_state));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056}
1057
Arjan van de Ven9a321442007-02-12 00:55:35 -08001058static const struct file_operations fib_seq_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 .owner = THIS_MODULE,
1060 .open = fib_seq_open,
1061 .read = seq_read,
1062 .llseek = seq_lseek,
Denis V. Lunev6e04d012008-01-10 03:26:50 -08001063 .release = seq_release_net,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064};
1065
Denis V. Lunev61a02652008-01-10 03:21:09 -08001066int __net_init fib_proc_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067{
Denis V. Lunev61a02652008-01-10 03:21:09 -08001068 if (!proc_net_fops_create(net, "route", S_IRUGO, &fib_seq_fops))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 return -ENOMEM;
1070 return 0;
1071}
1072
Denis V. Lunev61a02652008-01-10 03:21:09 -08001073void __net_exit fib_proc_exit(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074{
Denis V. Lunev61a02652008-01-10 03:21:09 -08001075 proc_net_remove(net, "route");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076}
1077#endif /* CONFIG_PROC_FS */