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Commit | Line | Data |
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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> | |
1da177e4 LT |
13 | #include <linux/types.h> |
14 | #include <linux/kernel.h> | |
1da177e4 | 15 | #include <linux/string.h> |
1da177e4 | 16 | #include <linux/errno.h> |
1da177e4 | 17 | #include <linux/skbuff.h> |
0ba48053 PM |
18 | #include <net/dst.h> |
19 | #include <net/route.h> | |
20 | #include <net/netlink.h> | |
1da177e4 LT |
21 | #include <net/act_api.h> |
22 | #include <net/pkt_cls.h> | |
23 | ||
24 | /* | |
25 | 1. For now we assume that route tags < 256. | |
26 | It allows to use direct table lookups, instead of hash tables. | |
27 | 2. For now we assume that "from TAG" and "fromdev DEV" statements | |
28 | are mutually exclusive. | |
29 | 3. "to TAG from ANY" has higher priority, than "to ANY from XXX" | |
30 | */ | |
31 | ||
32 | struct route4_fastmap | |
33 | { | |
34 | struct route4_filter *filter; | |
35 | u32 id; | |
36 | int iif; | |
37 | }; | |
38 | ||
39 | struct route4_head | |
40 | { | |
41 | struct route4_fastmap fastmap[16]; | |
42 | struct route4_bucket *table[256+1]; | |
43 | }; | |
44 | ||
45 | struct route4_bucket | |
46 | { | |
47 | /* 16 FROM buckets + 16 IIF buckets + 1 wildcard bucket */ | |
48 | struct route4_filter *ht[16+16+1]; | |
49 | }; | |
50 | ||
51 | struct route4_filter | |
52 | { | |
53 | struct route4_filter *next; | |
54 | u32 id; | |
55 | int iif; | |
56 | ||
57 | struct tcf_result res; | |
58 | struct tcf_exts exts; | |
59 | u32 handle; | |
60 | struct route4_bucket *bkt; | |
61 | }; | |
62 | ||
63 | #define ROUTE4_FAILURE ((struct route4_filter*)(-1L)) | |
64 | ||
65 | static struct tcf_ext_map route_ext_map = { | |
66 | .police = TCA_ROUTE4_POLICE, | |
67 | .action = TCA_ROUTE4_ACT | |
68 | }; | |
69 | ||
70 | static __inline__ int route4_fastmap_hash(u32 id, int iif) | |
71 | { | |
72 | return id&0xF; | |
73 | } | |
74 | ||
75 | static inline | |
76 | void route4_reset_fastmap(struct net_device *dev, struct route4_head *head, u32 id) | |
77 | { | |
fd44de7c | 78 | qdisc_lock_tree(dev); |
1da177e4 | 79 | memset(head->fastmap, 0, sizeof(head->fastmap)); |
fd44de7c | 80 | qdisc_unlock_tree(dev); |
1da177e4 LT |
81 | } |
82 | ||
b6f99a21 | 83 | static inline void |
1da177e4 LT |
84 | route4_set_fastmap(struct route4_head *head, u32 id, int iif, |
85 | struct route4_filter *f) | |
86 | { | |
87 | int h = route4_fastmap_hash(id, iif); | |
88 | head->fastmap[h].id = id; | |
89 | head->fastmap[h].iif = iif; | |
90 | head->fastmap[h].filter = f; | |
91 | } | |
92 | ||
93 | static __inline__ int route4_hash_to(u32 id) | |
94 | { | |
95 | return id&0xFF; | |
96 | } | |
97 | ||
98 | static __inline__ int route4_hash_from(u32 id) | |
99 | { | |
100 | return (id>>16)&0xF; | |
101 | } | |
102 | ||
103 | static __inline__ int route4_hash_iif(int iif) | |
104 | { | |
105 | return 16 + ((iif>>16)&0xF); | |
106 | } | |
107 | ||
108 | static __inline__ int route4_hash_wild(void) | |
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 | ||
128 | static int route4_classify(struct sk_buff *skb, struct tcf_proto *tp, | |
129 | struct tcf_result *res) | |
130 | { | |
131 | struct route4_head *head = (struct route4_head*)tp->root; | |
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 | ||
138 | if ((dst = skb->dst) == NULL) | |
139 | goto failure; | |
140 | ||
141 | id = dst->tclassid; | |
142 | if (head == NULL) | |
143 | goto old_method; | |
144 | ||
145 | iif = ((struct rtable*)dst)->fl.iif; | |
146 | ||
147 | h = route4_fastmap_hash(id, iif); | |
148 | if (id == head->fastmap[h].id && | |
149 | iif == head->fastmap[h].iif && | |
150 | (f = head->fastmap[h].filter) != NULL) { | |
151 | if (f == ROUTE4_FAILURE) | |
152 | goto failure; | |
153 | ||
154 | *res = f->res; | |
155 | return 0; | |
156 | } | |
157 | ||
158 | h = route4_hash_to(id); | |
159 | ||
160 | restart: | |
161 | if ((b = head->table[h]) != NULL) { | |
162 | for (f = b->ht[route4_hash_from(id)]; f; f = f->next) | |
163 | if (f->id == id) | |
164 | ROUTE4_APPLY_RESULT(); | |
165 | ||
166 | for (f = b->ht[route4_hash_iif(iif)]; f; f = f->next) | |
167 | if (f->iif == iif) | |
168 | ROUTE4_APPLY_RESULT(); | |
169 | ||
170 | for (f = b->ht[route4_hash_wild()]; f; f = f->next) | |
171 | ROUTE4_APPLY_RESULT(); | |
172 | ||
173 | } | |
174 | if (h < 256) { | |
175 | h = 256; | |
176 | id &= ~0xFFFF; | |
177 | goto restart; | |
178 | } | |
179 | ||
180 | if (!dont_cache) | |
181 | route4_set_fastmap(head, id, iif, ROUTE4_FAILURE); | |
182 | failure: | |
183 | return -1; | |
184 | ||
185 | old_method: | |
186 | if (id && (TC_H_MAJ(id) == 0 || | |
187 | !(TC_H_MAJ(id^tp->q->handle)))) { | |
188 | res->classid = id; | |
189 | res->class = 0; | |
190 | return 0; | |
191 | } | |
192 | return -1; | |
193 | } | |
194 | ||
195 | static inline u32 to_hash(u32 id) | |
196 | { | |
197 | u32 h = id&0xFF; | |
198 | if (id&0x8000) | |
199 | h += 256; | |
200 | return h; | |
201 | } | |
202 | ||
203 | static inline u32 from_hash(u32 id) | |
204 | { | |
205 | id &= 0xFFFF; | |
206 | if (id == 0xFFFF) | |
207 | return 32; | |
208 | if (!(id & 0x8000)) { | |
209 | if (id > 255) | |
210 | return 256; | |
211 | return id&0xF; | |
212 | } | |
213 | return 16 + (id&0xF); | |
214 | } | |
215 | ||
216 | static unsigned long route4_get(struct tcf_proto *tp, u32 handle) | |
217 | { | |
218 | struct route4_head *head = (struct route4_head*)tp->root; | |
219 | struct route4_bucket *b; | |
220 | struct route4_filter *f; | |
221 | unsigned h1, h2; | |
222 | ||
223 | if (!head) | |
224 | return 0; | |
225 | ||
226 | h1 = to_hash(handle); | |
227 | if (h1 > 256) | |
228 | return 0; | |
229 | ||
230 | h2 = from_hash(handle>>16); | |
231 | if (h2 > 32) | |
232 | return 0; | |
233 | ||
234 | if ((b = head->table[h1]) != NULL) { | |
235 | for (f = b->ht[h2]; f; f = f->next) | |
236 | if (f->handle == handle) | |
237 | return (unsigned long)f; | |
238 | } | |
239 | return 0; | |
240 | } | |
241 | ||
242 | static void route4_put(struct tcf_proto *tp, unsigned long f) | |
243 | { | |
244 | } | |
245 | ||
246 | static int route4_init(struct tcf_proto *tp) | |
247 | { | |
248 | return 0; | |
249 | } | |
250 | ||
251 | static inline void | |
252 | route4_delete_filter(struct tcf_proto *tp, struct route4_filter *f) | |
253 | { | |
254 | tcf_unbind_filter(tp, &f->res); | |
255 | tcf_exts_destroy(tp, &f->exts); | |
256 | kfree(f); | |
257 | } | |
258 | ||
259 | static void route4_destroy(struct tcf_proto *tp) | |
260 | { | |
261 | struct route4_head *head = xchg(&tp->root, NULL); | |
262 | int h1, h2; | |
263 | ||
264 | if (head == NULL) | |
265 | return; | |
266 | ||
267 | for (h1=0; h1<=256; h1++) { | |
268 | struct route4_bucket *b; | |
269 | ||
270 | if ((b = head->table[h1]) != NULL) { | |
271 | for (h2=0; h2<=32; h2++) { | |
272 | struct route4_filter *f; | |
273 | ||
274 | while ((f = b->ht[h2]) != NULL) { | |
275 | b->ht[h2] = f->next; | |
276 | route4_delete_filter(tp, f); | |
277 | } | |
278 | } | |
279 | kfree(b); | |
280 | } | |
281 | } | |
282 | kfree(head); | |
283 | } | |
284 | ||
285 | static int route4_delete(struct tcf_proto *tp, unsigned long arg) | |
286 | { | |
287 | struct route4_head *head = (struct route4_head*)tp->root; | |
288 | struct route4_filter **fp, *f = (struct route4_filter*)arg; | |
289 | unsigned h = 0; | |
290 | struct route4_bucket *b; | |
291 | int i; | |
292 | ||
293 | if (!head || !f) | |
294 | return -EINVAL; | |
295 | ||
296 | h = f->handle; | |
297 | b = f->bkt; | |
298 | ||
299 | for (fp = &b->ht[from_hash(h>>16)]; *fp; fp = &(*fp)->next) { | |
300 | if (*fp == f) { | |
301 | tcf_tree_lock(tp); | |
302 | *fp = f->next; | |
303 | tcf_tree_unlock(tp); | |
304 | ||
305 | route4_reset_fastmap(tp->q->dev, head, f->id); | |
306 | route4_delete_filter(tp, f); | |
307 | ||
308 | /* Strip tree */ | |
309 | ||
310 | for (i=0; i<=32; i++) | |
311 | if (b->ht[i]) | |
312 | return 0; | |
313 | ||
314 | /* OK, session has no flows */ | |
315 | tcf_tree_lock(tp); | |
316 | head->table[to_hash(h)] = NULL; | |
317 | tcf_tree_unlock(tp); | |
318 | ||
319 | kfree(b); | |
320 | return 0; | |
321 | } | |
322 | } | |
323 | return 0; | |
324 | } | |
325 | ||
326 | static int route4_set_parms(struct tcf_proto *tp, unsigned long base, | |
327 | struct route4_filter *f, u32 handle, struct route4_head *head, | |
add93b61 | 328 | struct nlattr **tb, struct nlattr *est, int new) |
1da177e4 LT |
329 | { |
330 | int err; | |
331 | u32 id = 0, to = 0, nhandle = 0x8000; | |
332 | struct route4_filter *fp; | |
333 | unsigned int h1; | |
334 | struct route4_bucket *b; | |
335 | struct tcf_exts e; | |
336 | ||
337 | err = tcf_exts_validate(tp, tb, est, &e, &route_ext_map); | |
338 | if (err < 0) | |
339 | return err; | |
340 | ||
341 | err = -EINVAL; | |
add93b61 PM |
342 | if (tb[TCA_ROUTE4_CLASSID]) |
343 | if (nla_len(tb[TCA_ROUTE4_CLASSID]) < sizeof(u32)) | |
1da177e4 LT |
344 | goto errout; |
345 | ||
add93b61 | 346 | if (tb[TCA_ROUTE4_TO]) { |
1da177e4 LT |
347 | if (new && handle & 0x8000) |
348 | goto errout; | |
add93b61 | 349 | if (nla_len(tb[TCA_ROUTE4_TO]) < sizeof(u32)) |
1da177e4 | 350 | goto errout; |
add93b61 | 351 | to = *(u32*)nla_data(tb[TCA_ROUTE4_TO]); |
1da177e4 LT |
352 | if (to > 0xFF) |
353 | goto errout; | |
354 | nhandle = to; | |
355 | } | |
356 | ||
add93b61 PM |
357 | if (tb[TCA_ROUTE4_FROM]) { |
358 | if (tb[TCA_ROUTE4_IIF]) | |
1da177e4 | 359 | goto errout; |
add93b61 | 360 | if (nla_len(tb[TCA_ROUTE4_FROM]) < sizeof(u32)) |
1da177e4 | 361 | goto errout; |
add93b61 | 362 | id = *(u32*)nla_data(tb[TCA_ROUTE4_FROM]); |
1da177e4 LT |
363 | if (id > 0xFF) |
364 | goto errout; | |
365 | nhandle |= id << 16; | |
add93b61 PM |
366 | } else if (tb[TCA_ROUTE4_IIF]) { |
367 | if (nla_len(tb[TCA_ROUTE4_IIF]) < sizeof(u32)) | |
1da177e4 | 368 | goto errout; |
add93b61 | 369 | id = *(u32*)nla_data(tb[TCA_ROUTE4_IIF]); |
1da177e4 LT |
370 | if (id > 0x7FFF) |
371 | goto errout; | |
372 | nhandle |= (id | 0x8000) << 16; | |
373 | } else | |
374 | nhandle |= 0xFFFF << 16; | |
375 | ||
376 | if (handle && new) { | |
377 | nhandle |= handle & 0x7F00; | |
378 | if (nhandle != handle) | |
379 | goto errout; | |
380 | } | |
381 | ||
382 | h1 = to_hash(nhandle); | |
383 | if ((b = head->table[h1]) == NULL) { | |
384 | err = -ENOBUFS; | |
0da974f4 | 385 | b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL); |
1da177e4 LT |
386 | if (b == NULL) |
387 | goto errout; | |
1da177e4 LT |
388 | |
389 | tcf_tree_lock(tp); | |
390 | head->table[h1] = b; | |
391 | tcf_tree_unlock(tp); | |
392 | } else { | |
393 | unsigned int h2 = from_hash(nhandle >> 16); | |
394 | err = -EEXIST; | |
395 | for (fp = b->ht[h2]; fp; fp = fp->next) | |
396 | if (fp->handle == f->handle) | |
397 | goto errout; | |
398 | } | |
399 | ||
400 | tcf_tree_lock(tp); | |
add93b61 | 401 | if (tb[TCA_ROUTE4_TO]) |
1da177e4 LT |
402 | f->id = to; |
403 | ||
add93b61 | 404 | if (tb[TCA_ROUTE4_FROM]) |
1da177e4 | 405 | f->id = to | id<<16; |
add93b61 | 406 | else if (tb[TCA_ROUTE4_IIF]) |
1da177e4 LT |
407 | f->iif = id; |
408 | ||
409 | f->handle = nhandle; | |
410 | f->bkt = b; | |
411 | tcf_tree_unlock(tp); | |
412 | ||
add93b61 PM |
413 | if (tb[TCA_ROUTE4_CLASSID]) { |
414 | f->res.classid = *(u32*)nla_data(tb[TCA_ROUTE4_CLASSID]); | |
1da177e4 LT |
415 | tcf_bind_filter(tp, &f->res, base); |
416 | } | |
417 | ||
418 | tcf_exts_change(tp, &f->exts, &e); | |
419 | ||
420 | return 0; | |
421 | errout: | |
422 | tcf_exts_destroy(tp, &e); | |
423 | return err; | |
424 | } | |
425 | ||
426 | static int route4_change(struct tcf_proto *tp, unsigned long base, | |
427 | u32 handle, | |
add93b61 | 428 | struct nlattr **tca, |
1da177e4 LT |
429 | unsigned long *arg) |
430 | { | |
431 | struct route4_head *head = tp->root; | |
432 | struct route4_filter *f, *f1, **fp; | |
433 | struct route4_bucket *b; | |
add93b61 PM |
434 | struct nlattr *opt = tca[TCA_OPTIONS]; |
435 | struct nlattr *tb[TCA_ROUTE4_MAX + 1]; | |
1da177e4 LT |
436 | unsigned int h, th; |
437 | u32 old_handle = 0; | |
438 | int err; | |
439 | ||
440 | if (opt == NULL) | |
441 | return handle ? -EINVAL : 0; | |
442 | ||
cee63723 PM |
443 | err = nla_parse_nested(tb, TCA_ROUTE4_MAX, opt, NULL); |
444 | if (err < 0) | |
445 | return err; | |
1da177e4 LT |
446 | |
447 | if ((f = (struct route4_filter*)*arg) != NULL) { | |
448 | if (f->handle != handle && handle) | |
449 | return -EINVAL; | |
450 | ||
451 | if (f->bkt) | |
452 | old_handle = f->handle; | |
453 | ||
454 | err = route4_set_parms(tp, base, f, handle, head, tb, | |
add93b61 | 455 | tca[TCA_RATE], 0); |
1da177e4 LT |
456 | if (err < 0) |
457 | return err; | |
458 | ||
459 | goto reinsert; | |
460 | } | |
461 | ||
462 | err = -ENOBUFS; | |
463 | if (head == NULL) { | |
0da974f4 | 464 | head = kzalloc(sizeof(struct route4_head), GFP_KERNEL); |
1da177e4 LT |
465 | if (head == NULL) |
466 | goto errout; | |
1da177e4 LT |
467 | |
468 | tcf_tree_lock(tp); | |
469 | tp->root = head; | |
470 | tcf_tree_unlock(tp); | |
471 | } | |
472 | ||
0da974f4 | 473 | f = kzalloc(sizeof(struct route4_filter), GFP_KERNEL); |
1da177e4 LT |
474 | if (f == NULL) |
475 | goto errout; | |
1da177e4 LT |
476 | |
477 | err = route4_set_parms(tp, base, f, handle, head, tb, | |
add93b61 | 478 | tca[TCA_RATE], 1); |
1da177e4 LT |
479 | if (err < 0) |
480 | goto errout; | |
481 | ||
482 | reinsert: | |
483 | h = from_hash(f->handle >> 16); | |
484 | for (fp = &f->bkt->ht[h]; (f1=*fp) != NULL; fp = &f1->next) | |
485 | if (f->handle < f1->handle) | |
486 | break; | |
487 | ||
488 | f->next = f1; | |
489 | tcf_tree_lock(tp); | |
490 | *fp = f; | |
491 | ||
492 | if (old_handle && f->handle != old_handle) { | |
493 | th = to_hash(old_handle); | |
494 | h = from_hash(old_handle >> 16); | |
495 | if ((b = head->table[th]) != NULL) { | |
496 | for (fp = &b->ht[h]; *fp; fp = &(*fp)->next) { | |
497 | if (*fp == f) { | |
498 | *fp = f->next; | |
499 | break; | |
500 | } | |
501 | } | |
502 | } | |
503 | } | |
504 | tcf_tree_unlock(tp); | |
505 | ||
506 | route4_reset_fastmap(tp->q->dev, head, f->id); | |
507 | *arg = (unsigned long)f; | |
508 | return 0; | |
509 | ||
510 | errout: | |
a51482bd | 511 | kfree(f); |
1da177e4 LT |
512 | return err; |
513 | } | |
514 | ||
515 | static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
516 | { | |
517 | struct route4_head *head = tp->root; | |
518 | unsigned h, h1; | |
519 | ||
520 | if (head == NULL) | |
521 | arg->stop = 1; | |
522 | ||
523 | if (arg->stop) | |
524 | return; | |
525 | ||
526 | for (h = 0; h <= 256; h++) { | |
527 | struct route4_bucket *b = head->table[h]; | |
528 | ||
529 | if (b) { | |
530 | for (h1 = 0; h1 <= 32; h1++) { | |
531 | struct route4_filter *f; | |
532 | ||
533 | for (f = b->ht[h1]; f; f = f->next) { | |
534 | if (arg->count < arg->skip) { | |
535 | arg->count++; | |
536 | continue; | |
537 | } | |
538 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { | |
539 | arg->stop = 1; | |
540 | return; | |
541 | } | |
542 | arg->count++; | |
543 | } | |
544 | } | |
545 | } | |
546 | } | |
547 | } | |
548 | ||
549 | static int route4_dump(struct tcf_proto *tp, unsigned long fh, | |
550 | struct sk_buff *skb, struct tcmsg *t) | |
551 | { | |
552 | struct route4_filter *f = (struct route4_filter*)fh; | |
27a884dc | 553 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 554 | struct nlattr *nest; |
1da177e4 LT |
555 | u32 id; |
556 | ||
557 | if (f == NULL) | |
558 | return skb->len; | |
559 | ||
560 | t->tcm_handle = f->handle; | |
561 | ||
4b3550ef PM |
562 | nest = nla_nest_start(skb, TCA_OPTIONS); |
563 | if (nest == NULL) | |
564 | goto nla_put_failure; | |
1da177e4 LT |
565 | |
566 | if (!(f->handle&0x8000)) { | |
567 | id = f->id&0xFF; | |
add93b61 | 568 | NLA_PUT(skb, TCA_ROUTE4_TO, sizeof(id), &id); |
1da177e4 LT |
569 | } |
570 | if (f->handle&0x80000000) { | |
571 | if ((f->handle>>16) != 0xFFFF) | |
add93b61 | 572 | NLA_PUT(skb, TCA_ROUTE4_IIF, sizeof(f->iif), &f->iif); |
1da177e4 LT |
573 | } else { |
574 | id = f->id>>16; | |
add93b61 | 575 | NLA_PUT(skb, TCA_ROUTE4_FROM, sizeof(id), &id); |
1da177e4 LT |
576 | } |
577 | if (f->res.classid) | |
add93b61 | 578 | NLA_PUT(skb, TCA_ROUTE4_CLASSID, 4, &f->res.classid); |
1da177e4 LT |
579 | |
580 | if (tcf_exts_dump(skb, &f->exts, &route_ext_map) < 0) | |
add93b61 | 581 | goto nla_put_failure; |
1da177e4 | 582 | |
4b3550ef | 583 | nla_nest_end(skb, nest); |
1da177e4 LT |
584 | |
585 | if (tcf_exts_dump_stats(skb, &f->exts, &route_ext_map) < 0) | |
add93b61 | 586 | goto nla_put_failure; |
1da177e4 LT |
587 | |
588 | return skb->len; | |
589 | ||
add93b61 | 590 | nla_put_failure: |
dc5fc579 | 591 | nlmsg_trim(skb, b); |
1da177e4 LT |
592 | return -1; |
593 | } | |
594 | ||
2eb9d75c | 595 | static struct tcf_proto_ops cls_route4_ops __read_mostly = { |
1da177e4 LT |
596 | .kind = "route", |
597 | .classify = route4_classify, | |
598 | .init = route4_init, | |
599 | .destroy = route4_destroy, | |
600 | .get = route4_get, | |
601 | .put = route4_put, | |
602 | .change = route4_change, | |
603 | .delete = route4_delete, | |
604 | .walk = route4_walk, | |
605 | .dump = route4_dump, | |
606 | .owner = THIS_MODULE, | |
607 | }; | |
608 | ||
609 | static int __init init_route4(void) | |
610 | { | |
611 | return register_tcf_proto_ops(&cls_route4_ops); | |
612 | } | |
613 | ||
614 | static void __exit exit_route4(void) | |
615 | { | |
616 | unregister_tcf_proto_ops(&cls_route4_ops); | |
617 | } | |
618 | ||
619 | module_init(init_route4) | |
620 | module_exit(exit_route4) | |
621 | MODULE_LICENSE("GPL"); |