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