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CommitLineData
1da177e4
LT
1/*
2 * net/sched/cls_route.c ROUTE4 classifier.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 */
11
12#include <linux/module.h>
5a0e3ad6 13#include <linux/slab.h>
1da177e4
LT
14#include <linux/types.h>
15#include <linux/kernel.h>
1da177e4 16#include <linux/string.h>
1da177e4 17#include <linux/errno.h>
1da177e4 18#include <linux/skbuff.h>
0ba48053
PM
19#include <net/dst.h>
20#include <net/route.h>
21#include <net/netlink.h>
1da177e4
LT
22#include <net/act_api.h>
23#include <net/pkt_cls.h>
24
25/*
cc7ec456
ED
26 * 1. For now we assume that route tags < 256.
27 * It allows to use direct table lookups, instead of hash tables.
28 * 2. For now we assume that "from TAG" and "fromdev DEV" statements
29 * are mutually exclusive.
30 * 3. "to TAG from ANY" has higher priority, than "to ANY from XXX"
1da177e4 31 */
cc7ec456 32struct route4_fastmap {
1109c005
JF
33 struct route4_filter *filter;
34 u32 id;
35 int iif;
1da177e4
LT
36};
37
cc7ec456 38struct route4_head {
1109c005
JF
39 struct route4_fastmap fastmap[16];
40 struct route4_bucket __rcu *table[256 + 1];
41 struct rcu_head rcu;
1da177e4
LT
42};
43
cc7ec456 44struct route4_bucket {
1da177e4 45 /* 16 FROM buckets + 16 IIF buckets + 1 wildcard bucket */
1109c005
JF
46 struct route4_filter __rcu *ht[16 + 16 + 1];
47 struct rcu_head rcu;
1da177e4
LT
48};
49
cc7ec456 50struct route4_filter {
1109c005 51 struct route4_filter __rcu *next;
1da177e4
LT
52 u32 id;
53 int iif;
54
55 struct tcf_result res;
56 struct tcf_exts exts;
57 u32 handle;
58 struct route4_bucket *bkt;
1109c005
JF
59 struct tcf_proto *tp;
60 struct rcu_head rcu;
1da177e4
LT
61};
62
cc7ec456 63#define ROUTE4_FAILURE ((struct route4_filter *)(-1L))
1da177e4 64
cc7ec456 65static inline int route4_fastmap_hash(u32 id, int iif)
1da177e4 66{
cc7ec456 67 return id & 0xF;
1da177e4
LT
68}
69
1109c005 70static DEFINE_SPINLOCK(fastmap_lock);
cc7ec456 71static void
1109c005 72route4_reset_fastmap(struct route4_head *head)
1da177e4 73{
1109c005 74 spin_lock_bh(&fastmap_lock);
1da177e4 75 memset(head->fastmap, 0, sizeof(head->fastmap));
1109c005 76 spin_unlock_bh(&fastmap_lock);
1da177e4
LT
77}
78
cc7ec456 79static void
1da177e4
LT
80route4_set_fastmap(struct route4_head *head, u32 id, int iif,
81 struct route4_filter *f)
82{
83 int h = route4_fastmap_hash(id, iif);
cc7ec456 84
1109c005
JF
85 /* fastmap updates must look atomic to aling id, iff, filter */
86 spin_lock_bh(&fastmap_lock);
1da177e4
LT
87 head->fastmap[h].id = id;
88 head->fastmap[h].iif = iif;
89 head->fastmap[h].filter = f;
1109c005 90 spin_unlock_bh(&fastmap_lock);
1da177e4
LT
91}
92
cc7ec456 93static inline int route4_hash_to(u32 id)
1da177e4 94{
cc7ec456 95 return id & 0xFF;
1da177e4
LT
96}
97
cc7ec456 98static inline int route4_hash_from(u32 id)
1da177e4 99{
cc7ec456 100 return (id >> 16) & 0xF;
1da177e4
LT
101}
102
cc7ec456 103static inline int route4_hash_iif(int iif)
1da177e4 104{
cc7ec456 105 return 16 + ((iif >> 16) & 0xF);
1da177e4
LT
106}
107
cc7ec456 108static inline int route4_hash_wild(void)
1da177e4
LT
109{
110 return 32;
111}
112
113#define ROUTE4_APPLY_RESULT() \
114{ \
115 *res = f->res; \
116 if (tcf_exts_is_available(&f->exts)) { \
117 int r = tcf_exts_exec(skb, &f->exts, res); \
118 if (r < 0) { \
119 dont_cache = 1; \
120 continue; \
121 } \
122 return r; \
123 } else if (!dont_cache) \
124 route4_set_fastmap(head, id, iif, f); \
125 return 0; \
126}
127
dc7f9f6e 128static int route4_classify(struct sk_buff *skb, const struct tcf_proto *tp,
1da177e4
LT
129 struct tcf_result *res)
130{
1109c005 131 struct route4_head *head = rcu_dereference_bh(tp->root);
1da177e4
LT
132 struct dst_entry *dst;
133 struct route4_bucket *b;
134 struct route4_filter *f;
135 u32 id, h;
136 int iif, dont_cache = 0;
137
cc7ec456
ED
138 dst = skb_dst(skb);
139 if (!dst)
1da177e4
LT
140 goto failure;
141
142 id = dst->tclassid;
143 if (head == NULL)
144 goto old_method;
145
92101b3b 146 iif = inet_iif(skb);
1da177e4
LT
147
148 h = route4_fastmap_hash(id, iif);
1109c005
JF
149
150 spin_lock(&fastmap_lock);
1da177e4
LT
151 if (id == head->fastmap[h].id &&
152 iif == head->fastmap[h].iif &&
153 (f = head->fastmap[h].filter) != NULL) {
1109c005
JF
154 if (f == ROUTE4_FAILURE) {
155 spin_unlock(&fastmap_lock);
1da177e4 156 goto failure;
1109c005 157 }
1da177e4
LT
158
159 *res = f->res;
1109c005 160 spin_unlock(&fastmap_lock);
1da177e4
LT
161 return 0;
162 }
1109c005 163 spin_unlock(&fastmap_lock);
1da177e4
LT
164
165 h = route4_hash_to(id);
166
167restart:
1109c005 168 b = rcu_dereference_bh(head->table[h]);
cc7ec456 169 if (b) {
1109c005
JF
170 for (f = rcu_dereference_bh(b->ht[route4_hash_from(id)]);
171 f;
172 f = rcu_dereference_bh(f->next))
1da177e4
LT
173 if (f->id == id)
174 ROUTE4_APPLY_RESULT();
175
1109c005
JF
176 for (f = rcu_dereference_bh(b->ht[route4_hash_iif(iif)]);
177 f;
178 f = rcu_dereference_bh(f->next))
1da177e4
LT
179 if (f->iif == iif)
180 ROUTE4_APPLY_RESULT();
181
1109c005
JF
182 for (f = rcu_dereference_bh(b->ht[route4_hash_wild()]);
183 f;
184 f = rcu_dereference_bh(f->next))
1da177e4 185 ROUTE4_APPLY_RESULT();
1da177e4
LT
186 }
187 if (h < 256) {
188 h = 256;
189 id &= ~0xFFFF;
190 goto restart;
191 }
192
193 if (!dont_cache)
194 route4_set_fastmap(head, id, iif, ROUTE4_FAILURE);
195failure:
196 return -1;
197
198old_method:
199 if (id && (TC_H_MAJ(id) == 0 ||
200 !(TC_H_MAJ(id^tp->q->handle)))) {
201 res->classid = id;
202 res->class = 0;
203 return 0;
204 }
205 return -1;
206}
207
208static inline u32 to_hash(u32 id)
209{
cc7ec456
ED
210 u32 h = id & 0xFF;
211
212 if (id & 0x8000)
1da177e4
LT
213 h += 256;
214 return h;
215}
216
217static inline u32 from_hash(u32 id)
218{
219 id &= 0xFFFF;
220 if (id == 0xFFFF)
221 return 32;
222 if (!(id & 0x8000)) {
223 if (id > 255)
224 return 256;
cc7ec456 225 return id & 0xF;
1da177e4 226 }
cc7ec456 227 return 16 + (id & 0xF);
1da177e4
LT
228}
229
230static unsigned long route4_get(struct tcf_proto *tp, u32 handle)
231{
1109c005 232 struct route4_head *head = rtnl_dereference(tp->root);
1da177e4
LT
233 struct route4_bucket *b;
234 struct route4_filter *f;
cc7ec456 235 unsigned int h1, h2;
1da177e4
LT
236
237 if (!head)
238 return 0;
239
240 h1 = to_hash(handle);
241 if (h1 > 256)
242 return 0;
243
cc7ec456 244 h2 = from_hash(handle >> 16);
1da177e4
LT
245 if (h2 > 32)
246 return 0;
247
1109c005 248 b = rtnl_dereference(head->table[h1]);
cc7ec456 249 if (b) {
1109c005
JF
250 for (f = rtnl_dereference(b->ht[h2]);
251 f;
252 f = rtnl_dereference(f->next))
1da177e4
LT
253 if (f->handle == handle)
254 return (unsigned long)f;
255 }
256 return 0;
257}
258
1da177e4
LT
259static int route4_init(struct tcf_proto *tp)
260{
a05c2d11
WC
261 struct route4_head *head;
262
263 head = kzalloc(sizeof(struct route4_head), GFP_KERNEL);
264 if (head == NULL)
265 return -ENOBUFS;
266
267 rcu_assign_pointer(tp->root, head);
1da177e4
LT
268 return 0;
269}
270
5a7a5555 271static void route4_delete_filter(struct rcu_head *head)
1da177e4 272{
1109c005 273 struct route4_filter *f = container_of(head, struct route4_filter, rcu);
1109c005 274
18d0264f 275 tcf_exts_destroy(&f->exts);
1da177e4
LT
276 kfree(f);
277}
278
1e052be6 279static bool route4_destroy(struct tcf_proto *tp, bool force)
1da177e4 280{
1109c005 281 struct route4_head *head = rtnl_dereference(tp->root);
1da177e4
LT
282 int h1, h2;
283
284 if (head == NULL)
1e052be6
CW
285 return true;
286
287 if (!force) {
288 for (h1 = 0; h1 <= 256; h1++) {
289 if (rcu_access_pointer(head->table[h1]))
290 return false;
291 }
292 }
1da177e4 293
cc7ec456 294 for (h1 = 0; h1 <= 256; h1++) {
1da177e4
LT
295 struct route4_bucket *b;
296
1109c005 297 b = rtnl_dereference(head->table[h1]);
cc7ec456
ED
298 if (b) {
299 for (h2 = 0; h2 <= 32; h2++) {
1da177e4
LT
300 struct route4_filter *f;
301
1109c005
JF
302 while ((f = rtnl_dereference(b->ht[h2])) != NULL) {
303 struct route4_filter *next;
304
305 next = rtnl_dereference(f->next);
306 RCU_INIT_POINTER(b->ht[h2], next);
18cdb37e 307 tcf_unbind_filter(tp, &f->res);
1109c005 308 call_rcu(&f->rcu, route4_delete_filter);
1da177e4
LT
309 }
310 }
1109c005
JF
311 RCU_INIT_POINTER(head->table[h1], NULL);
312 kfree_rcu(b, rcu);
1da177e4
LT
313 }
314 }
1109c005
JF
315 RCU_INIT_POINTER(tp->root, NULL);
316 kfree_rcu(head, rcu);
1e052be6 317 return true;
1da177e4
LT
318}
319
320static int route4_delete(struct tcf_proto *tp, unsigned long arg)
321{
1109c005
JF
322 struct route4_head *head = rtnl_dereference(tp->root);
323 struct route4_filter *f = (struct route4_filter *)arg;
324 struct route4_filter __rcu **fp;
325 struct route4_filter *nf;
1da177e4 326 struct route4_bucket *b;
1109c005 327 unsigned int h = 0;
1da177e4
LT
328 int i;
329
330 if (!head || !f)
331 return -EINVAL;
332
333 h = f->handle;
334 b = f->bkt;
335
1109c005
JF
336 fp = &b->ht[from_hash(h >> 16)];
337 for (nf = rtnl_dereference(*fp); nf;
338 fp = &nf->next, nf = rtnl_dereference(*fp)) {
339 if (nf == f) {
340 /* unlink it */
341 RCU_INIT_POINTER(*fp, rtnl_dereference(f->next));
1da177e4 342
1109c005
JF
343 /* Remove any fastmap lookups that might ref filter
344 * notice we unlink'd the filter so we can't get it
345 * back in the fastmap.
346 */
347 route4_reset_fastmap(head);
1da177e4 348
1109c005 349 /* Delete it */
18cdb37e 350 tcf_unbind_filter(tp, &f->res);
1109c005 351 call_rcu(&f->rcu, route4_delete_filter);
1da177e4 352
1109c005
JF
353 /* Strip RTNL protected tree */
354 for (i = 0; i <= 32; i++) {
355 struct route4_filter *rt;
356
357 rt = rtnl_dereference(b->ht[i]);
358 if (rt)
1da177e4 359 return 0;
1109c005 360 }
1da177e4
LT
361
362 /* OK, session has no flows */
1109c005
JF
363 RCU_INIT_POINTER(head->table[to_hash(h)], NULL);
364 kfree_rcu(b, rcu);
1da177e4 365
1da177e4
LT
366 return 0;
367 }
368 }
369 return 0;
370}
371
6fa8c014
PM
372static const struct nla_policy route4_policy[TCA_ROUTE4_MAX + 1] = {
373 [TCA_ROUTE4_CLASSID] = { .type = NLA_U32 },
374 [TCA_ROUTE4_TO] = { .type = NLA_U32 },
375 [TCA_ROUTE4_FROM] = { .type = NLA_U32 },
376 [TCA_ROUTE4_IIF] = { .type = NLA_U32 },
377};
378
c1b52739
BL
379static int route4_set_parms(struct net *net, struct tcf_proto *tp,
380 unsigned long base, struct route4_filter *f,
381 u32 handle, struct route4_head *head,
2f7ef2f8
CW
382 struct nlattr **tb, struct nlattr *est, int new,
383 bool ovr)
1da177e4 384{
1da177e4
LT
385 u32 id = 0, to = 0, nhandle = 0x8000;
386 struct route4_filter *fp;
387 unsigned int h1;
388 struct route4_bucket *b;
389 struct tcf_exts e;
b9a24bb7 390 int err;
1da177e4 391
b9a24bb7 392 err = tcf_exts_init(&e, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
1da177e4
LT
393 if (err < 0)
394 return err;
b9a24bb7
WC
395 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
396 if (err < 0)
397 goto errout;
1da177e4
LT
398
399 err = -EINVAL;
add93b61 400 if (tb[TCA_ROUTE4_TO]) {
1da177e4
LT
401 if (new && handle & 0x8000)
402 goto errout;
1587bac4 403 to = nla_get_u32(tb[TCA_ROUTE4_TO]);
1da177e4
LT
404 if (to > 0xFF)
405 goto errout;
406 nhandle = to;
407 }
408
add93b61
PM
409 if (tb[TCA_ROUTE4_FROM]) {
410 if (tb[TCA_ROUTE4_IIF])
1da177e4 411 goto errout;
1587bac4 412 id = nla_get_u32(tb[TCA_ROUTE4_FROM]);
1da177e4
LT
413 if (id > 0xFF)
414 goto errout;
415 nhandle |= id << 16;
add93b61 416 } else if (tb[TCA_ROUTE4_IIF]) {
1587bac4 417 id = nla_get_u32(tb[TCA_ROUTE4_IIF]);
1da177e4
LT
418 if (id > 0x7FFF)
419 goto errout;
420 nhandle |= (id | 0x8000) << 16;
421 } else
422 nhandle |= 0xFFFF << 16;
423
424 if (handle && new) {
425 nhandle |= handle & 0x7F00;
426 if (nhandle != handle)
427 goto errout;
428 }
429
430 h1 = to_hash(nhandle);
1109c005 431 b = rtnl_dereference(head->table[h1]);
cc7ec456 432 if (!b) {
1da177e4 433 err = -ENOBUFS;
0da974f4 434 b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL);
1da177e4
LT
435 if (b == NULL)
436 goto errout;
1da177e4 437
1109c005 438 rcu_assign_pointer(head->table[h1], b);
1da177e4
LT
439 } else {
440 unsigned int h2 = from_hash(nhandle >> 16);
cc7ec456 441
1da177e4 442 err = -EEXIST;
1109c005
JF
443 for (fp = rtnl_dereference(b->ht[h2]);
444 fp;
445 fp = rtnl_dereference(fp->next))
1da177e4
LT
446 if (fp->handle == f->handle)
447 goto errout;
448 }
449
add93b61 450 if (tb[TCA_ROUTE4_TO])
1da177e4
LT
451 f->id = to;
452
add93b61 453 if (tb[TCA_ROUTE4_FROM])
1da177e4 454 f->id = to | id<<16;
add93b61 455 else if (tb[TCA_ROUTE4_IIF])
1da177e4
LT
456 f->iif = id;
457
458 f->handle = nhandle;
459 f->bkt = b;
1109c005 460 f->tp = tp;
1da177e4 461
add93b61 462 if (tb[TCA_ROUTE4_CLASSID]) {
1587bac4 463 f->res.classid = nla_get_u32(tb[TCA_ROUTE4_CLASSID]);
1da177e4
LT
464 tcf_bind_filter(tp, &f->res, base);
465 }
466
467 tcf_exts_change(tp, &f->exts, &e);
468
469 return 0;
470errout:
18d0264f 471 tcf_exts_destroy(&e);
1da177e4
LT
472 return err;
473}
474
c1b52739 475static int route4_change(struct net *net, struct sk_buff *in_skb,
5a7a5555
JHS
476 struct tcf_proto *tp, unsigned long base, u32 handle,
477 struct nlattr **tca, unsigned long *arg, bool ovr)
1da177e4 478{
1109c005
JF
479 struct route4_head *head = rtnl_dereference(tp->root);
480 struct route4_filter __rcu **fp;
481 struct route4_filter *fold, *f1, *pfp, *f = NULL;
1da177e4 482 struct route4_bucket *b;
add93b61
PM
483 struct nlattr *opt = tca[TCA_OPTIONS];
484 struct nlattr *tb[TCA_ROUTE4_MAX + 1];
1da177e4 485 unsigned int h, th;
1da177e4 486 int err;
1109c005 487 bool new = true;
1da177e4
LT
488
489 if (opt == NULL)
490 return handle ? -EINVAL : 0;
491
fceb6435 492 err = nla_parse_nested(tb, TCA_ROUTE4_MAX, opt, route4_policy, NULL);
cee63723
PM
493 if (err < 0)
494 return err;
1da177e4 495
1109c005
JF
496 fold = (struct route4_filter *)*arg;
497 if (fold && handle && fold->handle != handle)
1da177e4
LT
498 return -EINVAL;
499
1da177e4 500 err = -ENOBUFS;
0da974f4 501 f = kzalloc(sizeof(struct route4_filter), GFP_KERNEL);
1109c005 502 if (!f)
1da177e4 503 goto errout;
1da177e4 504
b9a24bb7
WC
505 err = tcf_exts_init(&f->exts, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
506 if (err < 0)
507 goto errout;
508
1109c005
JF
509 if (fold) {
510 f->id = fold->id;
511 f->iif = fold->iif;
512 f->res = fold->res;
513 f->handle = fold->handle;
514
515 f->tp = fold->tp;
516 f->bkt = fold->bkt;
517 new = false;
518 }
519
c1b52739 520 err = route4_set_parms(net, tp, base, f, handle, head, tb,
1109c005 521 tca[TCA_RATE], new, ovr);
1da177e4
LT
522 if (err < 0)
523 goto errout;
524
1da177e4 525 h = from_hash(f->handle >> 16);
1109c005
JF
526 fp = &f->bkt->ht[h];
527 for (pfp = rtnl_dereference(*fp);
528 (f1 = rtnl_dereference(*fp)) != NULL;
529 fp = &f1->next)
1da177e4
LT
530 if (f->handle < f1->handle)
531 break;
532
02875878 533 netif_keep_dst(qdisc_dev(tp->q));
1109c005
JF
534 rcu_assign_pointer(f->next, f1);
535 rcu_assign_pointer(*fp, f);
1da177e4 536
1109c005
JF
537 if (fold && fold->handle && f->handle != fold->handle) {
538 th = to_hash(fold->handle);
539 h = from_hash(fold->handle >> 16);
540 b = rtnl_dereference(head->table[th]);
cc7ec456 541 if (b) {
1109c005
JF
542 fp = &b->ht[h];
543 for (pfp = rtnl_dereference(*fp); pfp;
544 fp = &pfp->next, pfp = rtnl_dereference(*fp)) {
545 if (pfp == f) {
1da177e4
LT
546 *fp = f->next;
547 break;
548 }
549 }
550 }
551 }
1da177e4 552
1109c005 553 route4_reset_fastmap(head);
1da177e4 554 *arg = (unsigned long)f;
18cdb37e
JF
555 if (fold) {
556 tcf_unbind_filter(tp, &fold->res);
1109c005 557 call_rcu(&fold->rcu, route4_delete_filter);
18cdb37e 558 }
1da177e4
LT
559 return 0;
560
561errout:
21641c2e
WC
562 if (f)
563 tcf_exts_destroy(&f->exts);
a51482bd 564 kfree(f);
1da177e4
LT
565 return err;
566}
567
568static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg)
569{
1109c005 570 struct route4_head *head = rtnl_dereference(tp->root);
cc7ec456 571 unsigned int h, h1;
1da177e4
LT
572
573 if (head == NULL)
574 arg->stop = 1;
575
576 if (arg->stop)
577 return;
578
579 for (h = 0; h <= 256; h++) {
1109c005 580 struct route4_bucket *b = rtnl_dereference(head->table[h]);
1da177e4
LT
581
582 if (b) {
583 for (h1 = 0; h1 <= 32; h1++) {
584 struct route4_filter *f;
585
1109c005
JF
586 for (f = rtnl_dereference(b->ht[h1]);
587 f;
588 f = rtnl_dereference(f->next)) {
1da177e4
LT
589 if (arg->count < arg->skip) {
590 arg->count++;
591 continue;
592 }
593 if (arg->fn(tp, (unsigned long)f, arg) < 0) {
594 arg->stop = 1;
595 return;
596 }
597 arg->count++;
598 }
599 }
600 }
601 }
602}
603
832d1d5b 604static int route4_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
1da177e4
LT
605 struct sk_buff *skb, struct tcmsg *t)
606{
cc7ec456 607 struct route4_filter *f = (struct route4_filter *)fh;
4b3550ef 608 struct nlattr *nest;
1da177e4
LT
609 u32 id;
610
611 if (f == NULL)
612 return skb->len;
613
614 t->tcm_handle = f->handle;
615
4b3550ef
PM
616 nest = nla_nest_start(skb, TCA_OPTIONS);
617 if (nest == NULL)
618 goto nla_put_failure;
1da177e4 619
cc7ec456
ED
620 if (!(f->handle & 0x8000)) {
621 id = f->id & 0xFF;
1b34ec43
DM
622 if (nla_put_u32(skb, TCA_ROUTE4_TO, id))
623 goto nla_put_failure;
1da177e4 624 }
cc7ec456 625 if (f->handle & 0x80000000) {
1b34ec43
DM
626 if ((f->handle >> 16) != 0xFFFF &&
627 nla_put_u32(skb, TCA_ROUTE4_IIF, f->iif))
628 goto nla_put_failure;
1da177e4 629 } else {
cc7ec456 630 id = f->id >> 16;
1b34ec43
DM
631 if (nla_put_u32(skb, TCA_ROUTE4_FROM, id))
632 goto nla_put_failure;
1da177e4 633 }
1b34ec43
DM
634 if (f->res.classid &&
635 nla_put_u32(skb, TCA_ROUTE4_CLASSID, f->res.classid))
636 goto nla_put_failure;
1da177e4 637
5da57f42 638 if (tcf_exts_dump(skb, &f->exts) < 0)
add93b61 639 goto nla_put_failure;
1da177e4 640
4b3550ef 641 nla_nest_end(skb, nest);
1da177e4 642
5da57f42 643 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
add93b61 644 goto nla_put_failure;
1da177e4
LT
645
646 return skb->len;
647
add93b61 648nla_put_failure:
6ea3b446 649 nla_nest_cancel(skb, nest);
1da177e4
LT
650 return -1;
651}
652
2eb9d75c 653static struct tcf_proto_ops cls_route4_ops __read_mostly = {
1da177e4
LT
654 .kind = "route",
655 .classify = route4_classify,
656 .init = route4_init,
657 .destroy = route4_destroy,
658 .get = route4_get,
1da177e4
LT
659 .change = route4_change,
660 .delete = route4_delete,
661 .walk = route4_walk,
662 .dump = route4_dump,
663 .owner = THIS_MODULE,
664};
665
666static int __init init_route4(void)
667{
668 return register_tcf_proto_ops(&cls_route4_ops);
669}
670
671static void __exit exit_route4(void)
672{
673 unregister_tcf_proto_ops(&cls_route4_ops);
674}
675
676module_init(init_route4)
677module_exit(exit_route4)
678MODULE_LICENSE("GPL");