[NET_SCHED]: Use nla_nest_start/nla_nest_end
[linux-2.6.git] / net / sched / cls_u32.c
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/types.h>
35 #include <linux/kernel.h>
36 #include <linux/string.h>
37 #include <linux/errno.h>
38 #include <linux/rtnetlink.h>
39 #include <linux/skbuff.h>
40 #include <net/netlink.h>
41 #include <net/act_api.h>
42 #include <net/pkt_cls.h>
43
44 struct tc_u_knode
45 {
46         struct tc_u_knode       *next;
47         u32                     handle;
48         struct tc_u_hnode       *ht_up;
49         struct tcf_exts         exts;
50 #ifdef CONFIG_NET_CLS_IND
51         char                     indev[IFNAMSIZ];
52 #endif
53         u8                      fshift;
54         struct tcf_result       res;
55         struct tc_u_hnode       *ht_down;
56 #ifdef CONFIG_CLS_U32_PERF
57         struct tc_u32_pcnt      *pf;
58 #endif
59 #ifdef CONFIG_CLS_U32_MARK
60         struct tc_u32_mark      mark;
61 #endif
62         struct tc_u32_sel       sel;
63 };
64
65 struct tc_u_hnode
66 {
67         struct tc_u_hnode       *next;
68         u32                     handle;
69         u32                     prio;
70         struct tc_u_common      *tp_c;
71         int                     refcnt;
72         unsigned                divisor;
73         struct tc_u_knode       *ht[1];
74 };
75
76 struct tc_u_common
77 {
78         struct tc_u_common      *next;
79         struct tc_u_hnode       *hlist;
80         struct Qdisc            *q;
81         int                     refcnt;
82         u32                     hgenerator;
83 };
84
85 static struct tcf_ext_map u32_ext_map = {
86         .action = TCA_U32_ACT,
87         .police = TCA_U32_POLICE
88 };
89
90 static struct tc_u_common *u32_list;
91
92 static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift)
93 {
94         unsigned h = ntohl(key & sel->hmask)>>fshift;
95
96         return h;
97 }
98
99 static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
100 {
101         struct {
102                 struct tc_u_knode *knode;
103                 u8                *ptr;
104         } stack[TC_U32_MAXDEPTH];
105
106         struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root;
107         u8 *ptr = skb_network_header(skb);
108         struct tc_u_knode *n;
109         int sdepth = 0;
110         int off2 = 0;
111         int sel = 0;
112 #ifdef CONFIG_CLS_U32_PERF
113         int j;
114 #endif
115         int i, r;
116
117 next_ht:
118         n = ht->ht[sel];
119
120 next_knode:
121         if (n) {
122                 struct tc_u32_key *key = n->sel.keys;
123
124 #ifdef CONFIG_CLS_U32_PERF
125                 n->pf->rcnt +=1;
126                 j = 0;
127 #endif
128
129 #ifdef CONFIG_CLS_U32_MARK
130                 if ((skb->mark & n->mark.mask) != n->mark.val) {
131                         n = n->next;
132                         goto next_knode;
133                 } else {
134                         n->mark.success++;
135                 }
136 #endif
137
138                 for (i = n->sel.nkeys; i>0; i--, key++) {
139
140                         if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) {
141                                 n = n->next;
142                                 goto next_knode;
143                         }
144 #ifdef CONFIG_CLS_U32_PERF
145                         n->pf->kcnts[j] +=1;
146                         j++;
147 #endif
148                 }
149                 if (n->ht_down == NULL) {
150 check_terminal:
151                         if (n->sel.flags&TC_U32_TERMINAL) {
152
153                                 *res = n->res;
154 #ifdef CONFIG_NET_CLS_IND
155                                 if (!tcf_match_indev(skb, n->indev)) {
156                                         n = n->next;
157                                         goto next_knode;
158                                 }
159 #endif
160 #ifdef CONFIG_CLS_U32_PERF
161                                 n->pf->rhit +=1;
162 #endif
163                                 r = tcf_exts_exec(skb, &n->exts, res);
164                                 if (r < 0) {
165                                         n = n->next;
166                                         goto next_knode;
167                                 }
168
169                                 return r;
170                         }
171                         n = n->next;
172                         goto next_knode;
173                 }
174
175                 /* PUSH */
176                 if (sdepth >= TC_U32_MAXDEPTH)
177                         goto deadloop;
178                 stack[sdepth].knode = n;
179                 stack[sdepth].ptr = ptr;
180                 sdepth++;
181
182                 ht = n->ht_down;
183                 sel = 0;
184                 if (ht->divisor)
185                         sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift);
186
187                 if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT)))
188                         goto next_ht;
189
190                 if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) {
191                         off2 = n->sel.off + 3;
192                         if (n->sel.flags&TC_U32_VAROFFSET)
193                                 off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift;
194                         off2 &= ~3;
195                 }
196                 if (n->sel.flags&TC_U32_EAT) {
197                         ptr += off2;
198                         off2 = 0;
199                 }
200
201                 if (ptr < skb_tail_pointer(skb))
202                         goto next_ht;
203         }
204
205         /* POP */
206         if (sdepth--) {
207                 n = stack[sdepth].knode;
208                 ht = n->ht_up;
209                 ptr = stack[sdepth].ptr;
210                 goto check_terminal;
211         }
212         return -1;
213
214 deadloop:
215         if (net_ratelimit())
216                 printk("cls_u32: dead loop\n");
217         return -1;
218 }
219
220 static __inline__ struct tc_u_hnode *
221 u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
222 {
223         struct tc_u_hnode *ht;
224
225         for (ht = tp_c->hlist; ht; ht = ht->next)
226                 if (ht->handle == handle)
227                         break;
228
229         return ht;
230 }
231
232 static __inline__ struct tc_u_knode *
233 u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
234 {
235         unsigned sel;
236         struct tc_u_knode *n = NULL;
237
238         sel = TC_U32_HASH(handle);
239         if (sel > ht->divisor)
240                 goto out;
241
242         for (n = ht->ht[sel]; n; n = n->next)
243                 if (n->handle == handle)
244                         break;
245 out:
246         return n;
247 }
248
249
250 static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
251 {
252         struct tc_u_hnode *ht;
253         struct tc_u_common *tp_c = tp->data;
254
255         if (TC_U32_HTID(handle) == TC_U32_ROOT)
256                 ht = tp->root;
257         else
258                 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
259
260         if (!ht)
261                 return 0;
262
263         if (TC_U32_KEY(handle) == 0)
264                 return (unsigned long)ht;
265
266         return (unsigned long)u32_lookup_key(ht, handle);
267 }
268
269 static void u32_put(struct tcf_proto *tp, unsigned long f)
270 {
271 }
272
273 static u32 gen_new_htid(struct tc_u_common *tp_c)
274 {
275         int i = 0x800;
276
277         do {
278                 if (++tp_c->hgenerator == 0x7FF)
279                         tp_c->hgenerator = 1;
280         } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
281
282         return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
283 }
284
285 static int u32_init(struct tcf_proto *tp)
286 {
287         struct tc_u_hnode *root_ht;
288         struct tc_u_common *tp_c;
289
290         for (tp_c = u32_list; tp_c; tp_c = tp_c->next)
291                 if (tp_c->q == tp->q)
292                         break;
293
294         root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
295         if (root_ht == NULL)
296                 return -ENOBUFS;
297
298         root_ht->divisor = 0;
299         root_ht->refcnt++;
300         root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
301         root_ht->prio = tp->prio;
302
303         if (tp_c == NULL) {
304                 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
305                 if (tp_c == NULL) {
306                         kfree(root_ht);
307                         return -ENOBUFS;
308                 }
309                 tp_c->q = tp->q;
310                 tp_c->next = u32_list;
311                 u32_list = tp_c;
312         }
313
314         tp_c->refcnt++;
315         root_ht->next = tp_c->hlist;
316         tp_c->hlist = root_ht;
317         root_ht->tp_c = tp_c;
318
319         tp->root = root_ht;
320         tp->data = tp_c;
321         return 0;
322 }
323
324 static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n)
325 {
326         tcf_unbind_filter(tp, &n->res);
327         tcf_exts_destroy(tp, &n->exts);
328         if (n->ht_down)
329                 n->ht_down->refcnt--;
330 #ifdef CONFIG_CLS_U32_PERF
331         kfree(n->pf);
332 #endif
333         kfree(n);
334         return 0;
335 }
336
337 static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
338 {
339         struct tc_u_knode **kp;
340         struct tc_u_hnode *ht = key->ht_up;
341
342         if (ht) {
343                 for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) {
344                         if (*kp == key) {
345                                 tcf_tree_lock(tp);
346                                 *kp = key->next;
347                                 tcf_tree_unlock(tp);
348
349                                 u32_destroy_key(tp, key);
350                                 return 0;
351                         }
352                 }
353         }
354         BUG_TRAP(0);
355         return 0;
356 }
357
358 static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
359 {
360         struct tc_u_knode *n;
361         unsigned h;
362
363         for (h=0; h<=ht->divisor; h++) {
364                 while ((n = ht->ht[h]) != NULL) {
365                         ht->ht[h] = n->next;
366
367                         u32_destroy_key(tp, n);
368                 }
369         }
370 }
371
372 static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
373 {
374         struct tc_u_common *tp_c = tp->data;
375         struct tc_u_hnode **hn;
376
377         BUG_TRAP(!ht->refcnt);
378
379         u32_clear_hnode(tp, ht);
380
381         for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) {
382                 if (*hn == ht) {
383                         *hn = ht->next;
384                         kfree(ht);
385                         return 0;
386                 }
387         }
388
389         BUG_TRAP(0);
390         return -ENOENT;
391 }
392
393 static void u32_destroy(struct tcf_proto *tp)
394 {
395         struct tc_u_common *tp_c = tp->data;
396         struct tc_u_hnode *root_ht = xchg(&tp->root, NULL);
397
398         BUG_TRAP(root_ht != NULL);
399
400         if (root_ht && --root_ht->refcnt == 0)
401                 u32_destroy_hnode(tp, root_ht);
402
403         if (--tp_c->refcnt == 0) {
404                 struct tc_u_hnode *ht;
405                 struct tc_u_common **tp_cp;
406
407                 for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) {
408                         if (*tp_cp == tp_c) {
409                                 *tp_cp = tp_c->next;
410                                 break;
411                         }
412                 }
413
414                 for (ht=tp_c->hlist; ht; ht = ht->next)
415                         u32_clear_hnode(tp, ht);
416
417                 while ((ht = tp_c->hlist) != NULL) {
418                         tp_c->hlist = ht->next;
419
420                         BUG_TRAP(ht->refcnt == 0);
421
422                         kfree(ht);
423                 }
424
425                 kfree(tp_c);
426         }
427
428         tp->data = NULL;
429 }
430
431 static int u32_delete(struct tcf_proto *tp, unsigned long arg)
432 {
433         struct tc_u_hnode *ht = (struct tc_u_hnode*)arg;
434
435         if (ht == NULL)
436                 return 0;
437
438         if (TC_U32_KEY(ht->handle))
439                 return u32_delete_key(tp, (struct tc_u_knode*)ht);
440
441         if (tp->root == ht)
442                 return -EINVAL;
443
444         if (--ht->refcnt == 0)
445                 u32_destroy_hnode(tp, ht);
446
447         return 0;
448 }
449
450 static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
451 {
452         struct tc_u_knode *n;
453         unsigned i = 0x7FF;
454
455         for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
456                 if (i < TC_U32_NODE(n->handle))
457                         i = TC_U32_NODE(n->handle);
458         i++;
459
460         return handle|(i>0xFFF ? 0xFFF : i);
461 }
462
463 static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
464                          struct tc_u_hnode *ht,
465                          struct tc_u_knode *n, struct nlattr **tb,
466                          struct nlattr *est)
467 {
468         int err;
469         struct tcf_exts e;
470
471         err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map);
472         if (err < 0)
473                 return err;
474
475         err = -EINVAL;
476         if (tb[TCA_U32_LINK]) {
477                 u32 handle = *(u32*)nla_data(tb[TCA_U32_LINK]);
478                 struct tc_u_hnode *ht_down = NULL;
479
480                 if (TC_U32_KEY(handle))
481                         goto errout;
482
483                 if (handle) {
484                         ht_down = u32_lookup_ht(ht->tp_c, handle);
485
486                         if (ht_down == NULL)
487                                 goto errout;
488                         ht_down->refcnt++;
489                 }
490
491                 tcf_tree_lock(tp);
492                 ht_down = xchg(&n->ht_down, ht_down);
493                 tcf_tree_unlock(tp);
494
495                 if (ht_down)
496                         ht_down->refcnt--;
497         }
498         if (tb[TCA_U32_CLASSID]) {
499                 n->res.classid = *(u32*)nla_data(tb[TCA_U32_CLASSID]);
500                 tcf_bind_filter(tp, &n->res, base);
501         }
502
503 #ifdef CONFIG_NET_CLS_IND
504         if (tb[TCA_U32_INDEV]) {
505                 err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV]);
506                 if (err < 0)
507                         goto errout;
508         }
509 #endif
510         tcf_exts_change(tp, &n->exts, &e);
511
512         return 0;
513 errout:
514         tcf_exts_destroy(tp, &e);
515         return err;
516 }
517
518 static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
519                       struct nlattr **tca,
520                       unsigned long *arg)
521 {
522         struct tc_u_common *tp_c = tp->data;
523         struct tc_u_hnode *ht;
524         struct tc_u_knode *n;
525         struct tc_u32_sel *s;
526         struct nlattr *opt = tca[TCA_OPTIONS];
527         struct nlattr *tb[TCA_U32_MAX + 1];
528         u32 htid;
529         int err;
530
531         if (opt == NULL)
532                 return handle ? -EINVAL : 0;
533
534         err = nla_parse_nested(tb, TCA_U32_MAX, opt, NULL);
535         if (err < 0)
536                 return err;
537
538         if ((n = (struct tc_u_knode*)*arg) != NULL) {
539                 if (TC_U32_KEY(n->handle) == 0)
540                         return -EINVAL;
541
542                 return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE]);
543         }
544
545         if (tb[TCA_U32_DIVISOR]) {
546                 unsigned divisor = *(unsigned*)nla_data(tb[TCA_U32_DIVISOR]);
547
548                 if (--divisor > 0x100)
549                         return -EINVAL;
550                 if (TC_U32_KEY(handle))
551                         return -EINVAL;
552                 if (handle == 0) {
553                         handle = gen_new_htid(tp->data);
554                         if (handle == 0)
555                                 return -ENOMEM;
556                 }
557                 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL);
558                 if (ht == NULL)
559                         return -ENOBUFS;
560                 ht->tp_c = tp_c;
561                 ht->refcnt = 0;
562                 ht->divisor = divisor;
563                 ht->handle = handle;
564                 ht->prio = tp->prio;
565                 ht->next = tp_c->hlist;
566                 tp_c->hlist = ht;
567                 *arg = (unsigned long)ht;
568                 return 0;
569         }
570
571         if (tb[TCA_U32_HASH]) {
572                 htid = *(unsigned*)nla_data(tb[TCA_U32_HASH]);
573                 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
574                         ht = tp->root;
575                         htid = ht->handle;
576                 } else {
577                         ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
578                         if (ht == NULL)
579                                 return -EINVAL;
580                 }
581         } else {
582                 ht = tp->root;
583                 htid = ht->handle;
584         }
585
586         if (ht->divisor < TC_U32_HASH(htid))
587                 return -EINVAL;
588
589         if (handle) {
590                 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
591                         return -EINVAL;
592                 handle = htid | TC_U32_NODE(handle);
593         } else
594                 handle = gen_new_kid(ht, htid);
595
596         if (tb[TCA_U32_SEL] == NULL ||
597             nla_len(tb[TCA_U32_SEL]) < sizeof(struct tc_u32_sel))
598                 return -EINVAL;
599
600         s = nla_data(tb[TCA_U32_SEL]);
601
602         n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
603         if (n == NULL)
604                 return -ENOBUFS;
605
606 #ifdef CONFIG_CLS_U32_PERF
607         n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL);
608         if (n->pf == NULL) {
609                 kfree(n);
610                 return -ENOBUFS;
611         }
612 #endif
613
614         memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
615         n->ht_up = ht;
616         n->handle = handle;
617         n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
618
619 #ifdef CONFIG_CLS_U32_MARK
620         if (tb[TCA_U32_MARK]) {
621                 struct tc_u32_mark *mark;
622
623                 if (nla_len(tb[TCA_U32_MARK]) < sizeof(struct tc_u32_mark)) {
624 #ifdef CONFIG_CLS_U32_PERF
625                         kfree(n->pf);
626 #endif
627                         kfree(n);
628                         return -EINVAL;
629                 }
630                 mark = nla_data(tb[TCA_U32_MARK]);
631                 memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
632                 n->mark.success = 0;
633         }
634 #endif
635
636         err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE]);
637         if (err == 0) {
638                 struct tc_u_knode **ins;
639                 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
640                         if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
641                                 break;
642
643                 n->next = *ins;
644                 wmb();
645                 *ins = n;
646
647                 *arg = (unsigned long)n;
648                 return 0;
649         }
650 #ifdef CONFIG_CLS_U32_PERF
651         kfree(n->pf);
652 #endif
653         kfree(n);
654         return err;
655 }
656
657 static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
658 {
659         struct tc_u_common *tp_c = tp->data;
660         struct tc_u_hnode *ht;
661         struct tc_u_knode *n;
662         unsigned h;
663
664         if (arg->stop)
665                 return;
666
667         for (ht = tp_c->hlist; ht; ht = ht->next) {
668                 if (ht->prio != tp->prio)
669                         continue;
670                 if (arg->count >= arg->skip) {
671                         if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
672                                 arg->stop = 1;
673                                 return;
674                         }
675                 }
676                 arg->count++;
677                 for (h = 0; h <= ht->divisor; h++) {
678                         for (n = ht->ht[h]; n; n = n->next) {
679                                 if (arg->count < arg->skip) {
680                                         arg->count++;
681                                         continue;
682                                 }
683                                 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
684                                         arg->stop = 1;
685                                         return;
686                                 }
687                                 arg->count++;
688                         }
689                 }
690         }
691 }
692
693 static int u32_dump(struct tcf_proto *tp, unsigned long fh,
694                      struct sk_buff *skb, struct tcmsg *t)
695 {
696         struct tc_u_knode *n = (struct tc_u_knode*)fh;
697         struct nlattr *nest;
698
699         if (n == NULL)
700                 return skb->len;
701
702         t->tcm_handle = n->handle;
703
704         nest = nla_nest_start(skb, TCA_OPTIONS);
705         if (nest == NULL)
706                 goto nla_put_failure;
707
708         if (TC_U32_KEY(n->handle) == 0) {
709                 struct tc_u_hnode *ht = (struct tc_u_hnode*)fh;
710                 u32 divisor = ht->divisor+1;
711                 NLA_PUT(skb, TCA_U32_DIVISOR, 4, &divisor);
712         } else {
713                 NLA_PUT(skb, TCA_U32_SEL,
714                         sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
715                         &n->sel);
716                 if (n->ht_up) {
717                         u32 htid = n->handle & 0xFFFFF000;
718                         NLA_PUT(skb, TCA_U32_HASH, 4, &htid);
719                 }
720                 if (n->res.classid)
721                         NLA_PUT(skb, TCA_U32_CLASSID, 4, &n->res.classid);
722                 if (n->ht_down)
723                         NLA_PUT(skb, TCA_U32_LINK, 4, &n->ht_down->handle);
724
725 #ifdef CONFIG_CLS_U32_MARK
726                 if (n->mark.val || n->mark.mask)
727                         NLA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark);
728 #endif
729
730                 if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0)
731                         goto nla_put_failure;
732
733 #ifdef CONFIG_NET_CLS_IND
734                 if(strlen(n->indev))
735                         NLA_PUT(skb, TCA_U32_INDEV, IFNAMSIZ, n->indev);
736 #endif
737 #ifdef CONFIG_CLS_U32_PERF
738                 NLA_PUT(skb, TCA_U32_PCNT,
739                 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
740                         n->pf);
741 #endif
742         }
743
744         nla_nest_end(skb, nest);
745
746         if (TC_U32_KEY(n->handle))
747                 if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0)
748                         goto nla_put_failure;
749         return skb->len;
750
751 nla_put_failure:
752         nla_nest_cancel(skb, nest);
753         return -1;
754 }
755
756 static struct tcf_proto_ops cls_u32_ops __read_mostly = {
757         .kind           =       "u32",
758         .classify       =       u32_classify,
759         .init           =       u32_init,
760         .destroy        =       u32_destroy,
761         .get            =       u32_get,
762         .put            =       u32_put,
763         .change         =       u32_change,
764         .delete         =       u32_delete,
765         .walk           =       u32_walk,
766         .dump           =       u32_dump,
767         .owner          =       THIS_MODULE,
768 };
769
770 static int __init init_u32(void)
771 {
772         printk("u32 classifier\n");
773 #ifdef CONFIG_CLS_U32_PERF
774         printk("    Performance counters on\n");
775 #endif
776 #ifdef CONFIG_NET_CLS_IND
777         printk("    input device check on \n");
778 #endif
779 #ifdef CONFIG_NET_CLS_ACT
780         printk("    Actions configured \n");
781 #endif
782         return register_tcf_proto_ops(&cls_u32_ops);
783 }
784
785 static void __exit exit_u32(void)
786 {
787         unregister_tcf_proto_ops(&cls_u32_ops);
788 }
789
790 module_init(init_u32)
791 module_exit(exit_u32)
792 MODULE_LICENSE("GPL");