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um, x86: Cast to (u64 *) inside set_64bit()
[linux-2.6.git] / net / sched / cls_u32.c
blob4f522143811e467fe70e7e4b13db47f979b11b8a
1 /*
2 * net/sched/cls_u32.c Ugly (or Universal) 32bit key Packet 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 * The filters are packed to hash tables of key nodes
12 * with a set of 32bit key/mask pairs at every node.
13 * Nodes reference next level hash tables etc.
14 *
15 * This scheme is the best universal classifier I managed to
16 * invent; it is not super-fast, but it is not slow (provided you
17 * program it correctly), and general enough. And its relative
18 * speed grows as the number of rules becomes larger.
19 *
20 * It seems that it represents the best middle point between
21 * speed and manageability both by human and by machine.
22 *
23 * It is especially useful for link sharing combined with QoS;
24 * pure RSVP doesn't need such a general approach and can use
25 * much simpler (and faster) schemes, sort of cls_rsvp.c.
26 *
27 * JHS: We should remove the CONFIG_NET_CLS_IND from here
28 * eventually when the meta match extension is made available
29 *
30 * nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro>
31 */
32
33 #include <linux/module.h>
34 #include <linux/slab.h>
35 #include <linux/types.h>
36 #include <linux/kernel.h>
37 #include <linux/string.h>
38 #include <linux/errno.h>
39 #include <linux/rtnetlink.h>
40 #include <linux/skbuff.h>
41 #include <net/netlink.h>
42 #include <net/act_api.h>
43 #include <net/pkt_cls.h>
44
45 struct tc_u_knode
46 {
47 struct tc_u_knode *next;
48 u32 handle;
49 struct tc_u_hnode *ht_up;
50 struct tcf_exts exts;
51 #ifdef CONFIG_NET_CLS_IND
52 char indev[IFNAMSIZ];
53 #endif
54 u8 fshift;
55 struct tcf_result res;
56 struct tc_u_hnode *ht_down;
57 #ifdef CONFIG_CLS_U32_PERF
58 struct tc_u32_pcnt *pf;
59 #endif
60 #ifdef CONFIG_CLS_U32_MARK
61 struct tc_u32_mark mark;
62 #endif
63 struct tc_u32_sel sel;
64 };
65
66 struct tc_u_hnode
67 {
68 struct tc_u_hnode *next;
69 u32 handle;
70 u32 prio;
71 struct tc_u_common *tp_c;
72 int refcnt;
73 unsigned divisor;
74 struct tc_u_knode *ht[1];
75 };
76
77 struct tc_u_common
78 {
79 struct tc_u_hnode *hlist;
80 struct Qdisc *q;
81 int refcnt;
82 u32 hgenerator;
83 };
84
85 static const struct tcf_ext_map u32_ext_map = {
86 .action = TCA_U32_ACT,
87 .police = TCA_U32_POLICE
88 };
89
90 static __inline__ unsigned u32_hash_fold(__be32 key, struct tc_u32_sel *sel, u8 fshift)
91 {
92 unsigned h = ntohl(key & sel->hmask)>>fshift;
93
94 return h;
95 }
96
97 static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
98 {
99 struct {
100 struct tc_u_knode *knode;
101 unsigned int off;
102 } stack[TC_U32_MAXDEPTH];
103
104 struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root;
105 unsigned int off = skb_network_offset(skb);
106 struct tc_u_knode *n;
107 int sdepth = 0;
108 int off2 = 0;
109 int sel = 0;
110 #ifdef CONFIG_CLS_U32_PERF
111 int j;
112 #endif
113 int i, r;
114
115 next_ht:
116 n = ht->ht[sel];
117
118 next_knode:
119 if (n) {
120 struct tc_u32_key *key = n->sel.keys;
121
122 #ifdef CONFIG_CLS_U32_PERF
123 n->pf->rcnt +=1;
124 j = 0;
125 #endif
126
127 #ifdef CONFIG_CLS_U32_MARK
128 if ((skb->mark & n->mark.mask) != n->mark.val) {
129 n = n->next;
130 goto next_knode;
131 } else {
132 n->mark.success++;
133 }
134 #endif
135
136 for (i = n->sel.nkeys; i>0; i--, key++) {
137 unsigned int toff;
138 __be32 *data, _data;
139
140 toff = off + key->off + (off2 & key->offmask);
141 data = skb_header_pointer(skb, toff, 4, &_data);
142 if (!data)
143 goto out;
144 if ((*data ^ key->val) & key->mask) {
145 n = n->next;
146 goto next_knode;
147 }
148 #ifdef CONFIG_CLS_U32_PERF
149 n->pf->kcnts[j] +=1;
150 j++;
151 #endif
152 }
153 if (n->ht_down == NULL) {
154 check_terminal:
155 if (n->sel.flags&TC_U32_TERMINAL) {
156
157 *res = n->res;
158 #ifdef CONFIG_NET_CLS_IND
159 if (!tcf_match_indev(skb, n->indev)) {
160 n = n->next;
161 goto next_knode;
162 }
163 #endif
164 #ifdef CONFIG_CLS_U32_PERF
165 n->pf->rhit +=1;
166 #endif
167 r = tcf_exts_exec(skb, &n->exts, res);
168 if (r < 0) {
169 n = n->next;
170 goto next_knode;
171 }
172
173 return r;
174 }
175 n = n->next;
176 goto next_knode;
177 }
178
179 /* PUSH */
180 if (sdepth >= TC_U32_MAXDEPTH)
181 goto deadloop;
182 stack[sdepth].knode = n;
183 stack[sdepth].off = off;
184 sdepth++;
185
186 ht = n->ht_down;
187 sel = 0;
188 if (ht->divisor) {
189 __be32 *data, _data;
190
191 data = skb_header_pointer(skb, off + n->sel.hoff, 4,
192 &_data);
193 if (!data)
194 goto out;
195 sel = ht->divisor & u32_hash_fold(*data, &n->sel,
196 n->fshift);
197 }
198 if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT)))
199 goto next_ht;
200
201 if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) {
202 off2 = n->sel.off + 3;
203 if (n->sel.flags & TC_U32_VAROFFSET) {
204 __be16 *data, _data;
205
206 data = skb_header_pointer(skb,
207 off + n->sel.offoff,
208 2, &_data);
209 if (!data)
210 goto out;
211 off2 += ntohs(n->sel.offmask & *data) >>
212 n->sel.offshift;
213 }
214 off2 &= ~3;
215 }
216 if (n->sel.flags&TC_U32_EAT) {
217 off += off2;
218 off2 = 0;
219 }
220
221 if (off < skb->len)
222 goto next_ht;
223 }
224
225 /* POP */
226 if (sdepth--) {
227 n = stack[sdepth].knode;
228 ht = n->ht_up;
229 off = stack[sdepth].off;
230 goto check_terminal;
231 }
232 out:
233 return -1;
234
235 deadloop:
236 if (net_ratelimit())
237 printk(KERN_WARNING "cls_u32: dead loop\n");
238 return -1;
239 }
240
241 static __inline__ struct tc_u_hnode *
242 u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
243 {
244 struct tc_u_hnode *ht;
245
246 for (ht = tp_c->hlist; ht; ht = ht->next)
247 if (ht->handle == handle)
248 break;
249
250 return ht;
251 }
252
253 static __inline__ struct tc_u_knode *
254 u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
255 {
256 unsigned sel;
257 struct tc_u_knode *n = NULL;
258
259 sel = TC_U32_HASH(handle);
260 if (sel > ht->divisor)
261 goto out;
262
263 for (n = ht->ht[sel]; n; n = n->next)
264 if (n->handle == handle)
265 break;
266 out:
267 return n;
268 }
269
270
271 static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
272 {
273 struct tc_u_hnode *ht;
274 struct tc_u_common *tp_c = tp->data;
275
276 if (TC_U32_HTID(handle) == TC_U32_ROOT)
277 ht = tp->root;
278 else
279 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
280
281 if (!ht)
282 return 0;
283
284 if (TC_U32_KEY(handle) == 0)
285 return (unsigned long)ht;
286
287 return (unsigned long)u32_lookup_key(ht, handle);
288 }
289
290 static void u32_put(struct tcf_proto *tp, unsigned long f)
291 {
292 }
293
294 static u32 gen_new_htid(struct tc_u_common *tp_c)
295 {
296 int i = 0x800;
297
298 do {
299 if (++tp_c->hgenerator == 0x7FF)
300 tp_c->hgenerator = 1;
301 } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
302
303 return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
304 }
305
306 static int u32_init(struct tcf_proto *tp)
307 {
308 struct tc_u_hnode *root_ht;
309 struct tc_u_common *tp_c;
310
311 tp_c = tp->q->u32_node;
312
313 root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
314 if (root_ht == NULL)
315 return -ENOBUFS;
316
317 root_ht->divisor = 0;
318 root_ht->refcnt++;
319 root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
320 root_ht->prio = tp->prio;
321
322 if (tp_c == NULL) {
323 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
324 if (tp_c == NULL) {
325 kfree(root_ht);
326 return -ENOBUFS;
327 }
328 tp_c->q = tp->q;
329 tp->q->u32_node = tp_c;
330 }
331
332 tp_c->refcnt++;
333 root_ht->next = tp_c->hlist;
334 tp_c->hlist = root_ht;
335 root_ht->tp_c = tp_c;
336
337 tp->root = root_ht;
338 tp->data = tp_c;
339 return 0;
340 }
341
342 static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n)
343 {
344 tcf_unbind_filter(tp, &n->res);
345 tcf_exts_destroy(tp, &n->exts);
346 if (n->ht_down)
347 n->ht_down->refcnt--;
348 #ifdef CONFIG_CLS_U32_PERF
349 kfree(n->pf);
350 #endif
351 kfree(n);
352 return 0;
353 }
354
355 static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
356 {
357 struct tc_u_knode **kp;
358 struct tc_u_hnode *ht = key->ht_up;
359
360 if (ht) {
361 for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) {
362 if (*kp == key) {
363 tcf_tree_lock(tp);
364 *kp = key->next;
365 tcf_tree_unlock(tp);
366
367 u32_destroy_key(tp, key);
368 return 0;
369 }
370 }
371 }
372 WARN_ON(1);
373 return 0;
374 }
375
376 static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
377 {
378 struct tc_u_knode *n;
379 unsigned h;
380
381 for (h=0; h<=ht->divisor; h++) {
382 while ((n = ht->ht[h]) != NULL) {
383 ht->ht[h] = n->next;
384
385 u32_destroy_key(tp, n);
386 }
387 }
388 }
389
390 static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
391 {
392 struct tc_u_common *tp_c = tp->data;
393 struct tc_u_hnode **hn;
394
395 WARN_ON(ht->refcnt);
396
397 u32_clear_hnode(tp, ht);
398
399 for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) {
400 if (*hn == ht) {
401 *hn = ht->next;
402 kfree(ht);
403 return 0;
404 }
405 }
406
407 WARN_ON(1);
408 return -ENOENT;
409 }
410
411 static void u32_destroy(struct tcf_proto *tp)
412 {
413 struct tc_u_common *tp_c = tp->data;
414 struct tc_u_hnode *root_ht = tp->root;
415
416 WARN_ON(root_ht == NULL);
417
418 if (root_ht && --root_ht->refcnt == 0)
419 u32_destroy_hnode(tp, root_ht);
420
421 if (--tp_c->refcnt == 0) {
422 struct tc_u_hnode *ht;
423
424 tp->q->u32_node = NULL;
425
426 for (ht = tp_c->hlist; ht; ht = ht->next) {
427 ht->refcnt--;
428 u32_clear_hnode(tp, ht);
429 }
430
431 while ((ht = tp_c->hlist) != NULL) {
432 tp_c->hlist = ht->next;
433
434 WARN_ON(ht->refcnt != 0);
435
436 kfree(ht);
437 }
438
439 kfree(tp_c);
440 }
441
442 tp->data = NULL;
443 }
444
445 static int u32_delete(struct tcf_proto *tp, unsigned long arg)
446 {
447 struct tc_u_hnode *ht = (struct tc_u_hnode*)arg;
448
449 if (ht == NULL)
450 return 0;
451
452 if (TC_U32_KEY(ht->handle))
453 return u32_delete_key(tp, (struct tc_u_knode*)ht);
454
455 if (tp->root == ht)
456 return -EINVAL;
457
458 if (ht->refcnt == 1) {
459 ht->refcnt--;
460 u32_destroy_hnode(tp, ht);
461 } else {
462 return -EBUSY;
463 }
464
465 return 0;
466 }
467
468 static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
469 {
470 struct tc_u_knode *n;
471 unsigned i = 0x7FF;
472
473 for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
474 if (i < TC_U32_NODE(n->handle))
475 i = TC_U32_NODE(n->handle);
476 i++;
477
478 return handle|(i>0xFFF ? 0xFFF : i);
479 }
480
481 static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
482 [TCA_U32_CLASSID] = { .type = NLA_U32 },
483 [TCA_U32_HASH] = { .type = NLA_U32 },
484 [TCA_U32_LINK] = { .type = NLA_U32 },
485 [TCA_U32_DIVISOR] = { .type = NLA_U32 },
486 [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) },
487 [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
488 [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) },
489 };
490
491 static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
492 struct tc_u_hnode *ht,
493 struct tc_u_knode *n, struct nlattr **tb,
494 struct nlattr *est)
495 {
496 int err;
497 struct tcf_exts e;
498
499 err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map);
500 if (err < 0)
501 return err;
502
503 err = -EINVAL;
504 if (tb[TCA_U32_LINK]) {
505 u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
506 struct tc_u_hnode *ht_down = NULL, *ht_old;
507
508 if (TC_U32_KEY(handle))
509 goto errout;
510
511 if (handle) {
512 ht_down = u32_lookup_ht(ht->tp_c, handle);
513
514 if (ht_down == NULL)
515 goto errout;
516 ht_down->refcnt++;
517 }
518
519 tcf_tree_lock(tp);
520 ht_old = n->ht_down;
521 n->ht_down = ht_down;
522 tcf_tree_unlock(tp);
523
524 if (ht_old)
525 ht_old->refcnt--;
526 }
527 if (tb[TCA_U32_CLASSID]) {
528 n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]);
529 tcf_bind_filter(tp, &n->res, base);
530 }
531
532 #ifdef CONFIG_NET_CLS_IND
533 if (tb[TCA_U32_INDEV]) {
534 err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV]);
535 if (err < 0)
536 goto errout;
537 }
538 #endif
539 tcf_exts_change(tp, &n->exts, &e);
540
541 return 0;
542 errout:
543 tcf_exts_destroy(tp, &e);
544 return err;
545 }
546
547 static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
548 struct nlattr **tca,
549 unsigned long *arg)
550 {
551 struct tc_u_common *tp_c = tp->data;
552 struct tc_u_hnode *ht;
553 struct tc_u_knode *n;
554 struct tc_u32_sel *s;
555 struct nlattr *opt = tca[TCA_OPTIONS];
556 struct nlattr *tb[TCA_U32_MAX + 1];
557 u32 htid;
558 int err;
559
560 if (opt == NULL)
561 return handle ? -EINVAL : 0;
562
563 err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy);
564 if (err < 0)
565 return err;
566
567 if ((n = (struct tc_u_knode*)*arg) != NULL) {
568 if (TC_U32_KEY(n->handle) == 0)
569 return -EINVAL;
570
571 return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE]);
572 }
573
574 if (tb[TCA_U32_DIVISOR]) {
575 unsigned divisor = nla_get_u32(tb[TCA_U32_DIVISOR]);
576
577 if (--divisor > 0x100)
578 return -EINVAL;
579 if (TC_U32_KEY(handle))
580 return -EINVAL;
581 if (handle == 0) {
582 handle = gen_new_htid(tp->data);
583 if (handle == 0)
584 return -ENOMEM;
585 }
586 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL);
587 if (ht == NULL)
588 return -ENOBUFS;
589 ht->tp_c = tp_c;
590 ht->refcnt = 1;
591 ht->divisor = divisor;
592 ht->handle = handle;
593 ht->prio = tp->prio;
594 ht->next = tp_c->hlist;
595 tp_c->hlist = ht;
596 *arg = (unsigned long)ht;
597 return 0;
598 }
599
600 if (tb[TCA_U32_HASH]) {
601 htid = nla_get_u32(tb[TCA_U32_HASH]);
602 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
603 ht = tp->root;
604 htid = ht->handle;
605 } else {
606 ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
607 if (ht == NULL)
608 return -EINVAL;
609 }
610 } else {
611 ht = tp->root;
612 htid = ht->handle;
613 }
614
615 if (ht->divisor < TC_U32_HASH(htid))
616 return -EINVAL;
617
618 if (handle) {
619 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
620 return -EINVAL;
621 handle = htid | TC_U32_NODE(handle);
622 } else
623 handle = gen_new_kid(ht, htid);
624
625 if (tb[TCA_U32_SEL] == NULL)
626 return -EINVAL;
627
628 s = nla_data(tb[TCA_U32_SEL]);
629
630 n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
631 if (n == NULL)
632 return -ENOBUFS;
633
634 #ifdef CONFIG_CLS_U32_PERF
635 n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL);
636 if (n->pf == NULL) {
637 kfree(n);
638 return -ENOBUFS;
639 }
640 #endif
641
642 memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
643 n->ht_up = ht;
644 n->handle = handle;
645 n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
646
647 #ifdef CONFIG_CLS_U32_MARK
648 if (tb[TCA_U32_MARK]) {
649 struct tc_u32_mark *mark;
650
651 mark = nla_data(tb[TCA_U32_MARK]);
652 memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
653 n->mark.success = 0;
654 }
655 #endif
656
657 err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE]);
658 if (err == 0) {
659 struct tc_u_knode **ins;
660 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
661 if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
662 break;
663
664 n->next = *ins;
665 tcf_tree_lock(tp);
666 *ins = n;
667 tcf_tree_unlock(tp);
668
669 *arg = (unsigned long)n;
670 return 0;
671 }
672 #ifdef CONFIG_CLS_U32_PERF
673 kfree(n->pf);
674 #endif
675 kfree(n);
676 return err;
677 }
678
679 static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
680 {
681 struct tc_u_common *tp_c = tp->data;
682 struct tc_u_hnode *ht;
683 struct tc_u_knode *n;
684 unsigned h;
685
686 if (arg->stop)
687 return;
688
689 for (ht = tp_c->hlist; ht; ht = ht->next) {
690 if (ht->prio != tp->prio)
691 continue;
692 if (arg->count >= arg->skip) {
693 if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
694 arg->stop = 1;
695 return;
696 }
697 }
698 arg->count++;
699 for (h = 0; h <= ht->divisor; h++) {
700 for (n = ht->ht[h]; n; n = n->next) {
701 if (arg->count < arg->skip) {
702 arg->count++;
703 continue;
704 }
705 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
706 arg->stop = 1;
707 return;
708 }
709 arg->count++;
710 }
711 }
712 }
713 }
714
715 static int u32_dump(struct tcf_proto *tp, unsigned long fh,
716 struct sk_buff *skb, struct tcmsg *t)
717 {
718 struct tc_u_knode *n = (struct tc_u_knode*)fh;
719 struct nlattr *nest;
720
721 if (n == NULL)
722 return skb->len;
723
724 t->tcm_handle = n->handle;
725
726 nest = nla_nest_start(skb, TCA_OPTIONS);
727 if (nest == NULL)
728 goto nla_put_failure;
729
730 if (TC_U32_KEY(n->handle) == 0) {
731 struct tc_u_hnode *ht = (struct tc_u_hnode*)fh;
732 u32 divisor = ht->divisor+1;
733 NLA_PUT_U32(skb, TCA_U32_DIVISOR, divisor);
734 } else {
735 NLA_PUT(skb, TCA_U32_SEL,
736 sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
737 &n->sel);
738 if (n->ht_up) {
739 u32 htid = n->handle & 0xFFFFF000;
740 NLA_PUT_U32(skb, TCA_U32_HASH, htid);
741 }
742 if (n->res.classid)
743 NLA_PUT_U32(skb, TCA_U32_CLASSID, n->res.classid);
744 if (n->ht_down)
745 NLA_PUT_U32(skb, TCA_U32_LINK, n->ht_down->handle);
746
747 #ifdef CONFIG_CLS_U32_MARK
748 if (n->mark.val || n->mark.mask)
749 NLA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark);
750 #endif
751
752 if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0)
753 goto nla_put_failure;
754
755 #ifdef CONFIG_NET_CLS_IND
756 if(strlen(n->indev))
757 NLA_PUT_STRING(skb, TCA_U32_INDEV, n->indev);
758 #endif
759 #ifdef CONFIG_CLS_U32_PERF
760 NLA_PUT(skb, TCA_U32_PCNT,
761 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
762 n->pf);
763 #endif
764 }
765
766 nla_nest_end(skb, nest);
767
768 if (TC_U32_KEY(n->handle))
769 if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0)
770 goto nla_put_failure;
771 return skb->len;
772
773 nla_put_failure:
774 nla_nest_cancel(skb, nest);
775 return -1;
776 }
777
778 static struct tcf_proto_ops cls_u32_ops __read_mostly = {
779 .kind = "u32",
780 .classify = u32_classify,
781 .init = u32_init,
782 .destroy = u32_destroy,
783 .get = u32_get,
784 .put = u32_put,
785 .change = u32_change,
786 .delete = u32_delete,
787 .walk = u32_walk,
788 .dump = u32_dump,
789 .owner = THIS_MODULE,
790 };
791
792 static int __init init_u32(void)
793 {
794 pr_info("u32 classifier\n");
795 #ifdef CONFIG_CLS_U32_PERF
796 pr_info(" Performance counters on\n");
797 #endif
798 #ifdef CONFIG_NET_CLS_IND
799 pr_info(" input device check on\n");
800 #endif
801 #ifdef CONFIG_NET_CLS_ACT
802 pr_info(" Actions configured\n");
803 #endif
804 return register_tcf_proto_ops(&cls_u32_ops);
805 }
806
807 static void __exit exit_u32(void)
808 {
809 unregister_tcf_proto_ops(&cls_u32_ops);
810 }
811
812 module_init(init_u32)
813 module_exit(exit_u32)
814 MODULE_LICENSE("GPL");
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