Merge branch 'upstream' into upstream-jgarzik
[linux-2.6] / 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 <asm/uaccess.h>
34 #include <asm/system.h>
35 #include <linux/bitops.h>
36 #include <linux/module.h>
37 #include <linux/types.h>
38 #include <linux/kernel.h>
39 #include <linux/string.h>
40 #include <linux/mm.h>
41 #include <linux/socket.h>
42 #include <linux/sockios.h>
43 #include <linux/in.h>
44 #include <linux/errno.h>
45 #include <linux/interrupt.h>
46 #include <linux/if_ether.h>
47 #include <linux/inet.h>
48 #include <linux/netdevice.h>
49 #include <linux/etherdevice.h>
50 #include <linux/notifier.h>
51 #include <linux/rtnetlink.h>
52 #include <net/ip.h>
53 #include <net/route.h>
54 #include <linux/skbuff.h>
55 #include <net/sock.h>
56 #include <net/act_api.h>
57 #include <net/pkt_cls.h>
58
59 struct tc_u_knode
60 {
61         struct tc_u_knode       *next;
62         u32                     handle;
63         struct tc_u_hnode       *ht_up;
64         struct tcf_exts         exts;
65 #ifdef CONFIG_NET_CLS_IND
66         char                     indev[IFNAMSIZ];
67 #endif
68         u8                      fshift;
69         struct tcf_result       res;
70         struct tc_u_hnode       *ht_down;
71 #ifdef CONFIG_CLS_U32_PERF
72         struct tc_u32_pcnt      *pf;
73 #endif
74 #ifdef CONFIG_CLS_U32_MARK
75         struct tc_u32_mark      mark;
76 #endif
77         struct tc_u32_sel       sel;
78 };
79
80 struct tc_u_hnode
81 {
82         struct tc_u_hnode       *next;
83         u32                     handle;
84         u32                     prio;
85         struct tc_u_common      *tp_c;
86         int                     refcnt;
87         unsigned                divisor;
88         struct tc_u_knode       *ht[1];
89 };
90
91 struct tc_u_common
92 {
93         struct tc_u_common      *next;
94         struct tc_u_hnode       *hlist;
95         struct Qdisc            *q;
96         int                     refcnt;
97         u32                     hgenerator;
98 };
99
100 static struct tcf_ext_map u32_ext_map = {
101         .action = TCA_U32_ACT,
102         .police = TCA_U32_POLICE
103 };
104
105 static struct tc_u_common *u32_list;
106
107 static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift)
108 {
109         unsigned h = (key & sel->hmask)>>fshift;
110
111         return h;
112 }
113
114 static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
115 {
116         struct {
117                 struct tc_u_knode *knode;
118                 u8                *ptr;
119         } stack[TC_U32_MAXDEPTH];
120
121         struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root;
122         u8 *ptr = skb->nh.raw;
123         struct tc_u_knode *n;
124         int sdepth = 0;
125         int off2 = 0;
126         int sel = 0;
127 #ifdef CONFIG_CLS_U32_PERF
128         int j;
129 #endif
130         int i, r;
131
132 next_ht:
133         n = ht->ht[sel];
134
135 next_knode:
136         if (n) {
137                 struct tc_u32_key *key = n->sel.keys;
138
139 #ifdef CONFIG_CLS_U32_PERF
140                 n->pf->rcnt +=1;
141                 j = 0;
142 #endif
143
144 #ifdef CONFIG_CLS_U32_MARK
145                 if ((skb->mark & n->mark.mask) != n->mark.val) {
146                         n = n->next;
147                         goto next_knode;
148                 } else {
149                         n->mark.success++;
150                 }
151 #endif
152
153                 for (i = n->sel.nkeys; i>0; i--, key++) {
154
155                         if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) {
156                                 n = n->next;
157                                 goto next_knode;
158                         }
159 #ifdef CONFIG_CLS_U32_PERF
160                         n->pf->kcnts[j] +=1;
161                         j++;
162 #endif
163                 }
164                 if (n->ht_down == NULL) {
165 check_terminal:
166                         if (n->sel.flags&TC_U32_TERMINAL) {
167
168                                 *res = n->res;
169 #ifdef CONFIG_NET_CLS_IND
170                                 if (!tcf_match_indev(skb, n->indev)) {
171                                         n = n->next;
172                                         goto next_knode;
173                                 }
174 #endif
175 #ifdef CONFIG_CLS_U32_PERF
176                                 n->pf->rhit +=1;
177 #endif
178                                 r = tcf_exts_exec(skb, &n->exts, res);
179                                 if (r < 0) {
180                                         n = n->next;
181                                         goto next_knode;
182                                 }
183
184                                 return r;
185                         }
186                         n = n->next;
187                         goto next_knode;
188                 }
189
190                 /* PUSH */
191                 if (sdepth >= TC_U32_MAXDEPTH)
192                         goto deadloop;
193                 stack[sdepth].knode = n;
194                 stack[sdepth].ptr = ptr;
195                 sdepth++;
196
197                 ht = n->ht_down;
198                 sel = 0;
199                 if (ht->divisor)
200                         sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift);
201
202                 if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT)))
203                         goto next_ht;
204
205                 if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) {
206                         off2 = n->sel.off + 3;
207                         if (n->sel.flags&TC_U32_VAROFFSET)
208                                 off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift;
209                         off2 &= ~3;
210                 }
211                 if (n->sel.flags&TC_U32_EAT) {
212                         ptr += off2;
213                         off2 = 0;
214                 }
215
216                 if (ptr < skb->tail)
217                         goto next_ht;
218         }
219
220         /* POP */
221         if (sdepth--) {
222                 n = stack[sdepth].knode;
223                 ht = n->ht_up;
224                 ptr = stack[sdepth].ptr;
225                 goto check_terminal;
226         }
227         return -1;
228
229 deadloop:
230         if (net_ratelimit())
231                 printk("cls_u32: dead loop\n");
232         return -1;
233 }
234
235 static __inline__ struct tc_u_hnode *
236 u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
237 {
238         struct tc_u_hnode *ht;
239
240         for (ht = tp_c->hlist; ht; ht = ht->next)
241                 if (ht->handle == handle)
242                         break;
243
244         return ht;
245 }
246
247 static __inline__ struct tc_u_knode *
248 u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
249 {
250         unsigned sel;
251         struct tc_u_knode *n = NULL;
252
253         sel = TC_U32_HASH(handle);
254         if (sel > ht->divisor)
255                 goto out;
256
257         for (n = ht->ht[sel]; n; n = n->next)
258                 if (n->handle == handle)
259                         break;
260 out:
261         return n;
262 }
263
264
265 static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
266 {
267         struct tc_u_hnode *ht;
268         struct tc_u_common *tp_c = tp->data;
269
270         if (TC_U32_HTID(handle) == TC_U32_ROOT)
271                 ht = tp->root;
272         else
273                 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
274
275         if (!ht)
276                 return 0;
277
278         if (TC_U32_KEY(handle) == 0)
279                 return (unsigned long)ht;
280
281         return (unsigned long)u32_lookup_key(ht, handle);
282 }
283
284 static void u32_put(struct tcf_proto *tp, unsigned long f)
285 {
286 }
287
288 static u32 gen_new_htid(struct tc_u_common *tp_c)
289 {
290         int i = 0x800;
291
292         do {
293                 if (++tp_c->hgenerator == 0x7FF)
294                         tp_c->hgenerator = 1;
295         } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
296
297         return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
298 }
299
300 static int u32_init(struct tcf_proto *tp)
301 {
302         struct tc_u_hnode *root_ht;
303         struct tc_u_common *tp_c;
304
305         for (tp_c = u32_list; tp_c; tp_c = tp_c->next)
306                 if (tp_c->q == tp->q)
307                         break;
308
309         root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
310         if (root_ht == NULL)
311                 return -ENOBUFS;
312
313         root_ht->divisor = 0;
314         root_ht->refcnt++;
315         root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
316         root_ht->prio = tp->prio;
317
318         if (tp_c == NULL) {
319                 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
320                 if (tp_c == NULL) {
321                         kfree(root_ht);
322                         return -ENOBUFS;
323                 }
324                 tp_c->q = tp->q;
325                 tp_c->next = u32_list;
326                 u32_list = tp_c;
327         }
328
329         tp_c->refcnt++;
330         root_ht->next = tp_c->hlist;
331         tp_c->hlist = root_ht;
332         root_ht->tp_c = tp_c;
333
334         tp->root = root_ht;
335         tp->data = tp_c;
336         return 0;
337 }
338
339 static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n)
340 {
341         tcf_unbind_filter(tp, &n->res);
342         tcf_exts_destroy(tp, &n->exts);
343         if (n->ht_down)
344                 n->ht_down->refcnt--;
345 #ifdef CONFIG_CLS_U32_PERF
346         kfree(n->pf);
347 #endif
348         kfree(n);
349         return 0;
350 }
351
352 static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
353 {
354         struct tc_u_knode **kp;
355         struct tc_u_hnode *ht = key->ht_up;
356
357         if (ht) {
358                 for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) {
359                         if (*kp == key) {
360                                 tcf_tree_lock(tp);
361                                 *kp = key->next;
362                                 tcf_tree_unlock(tp);
363
364                                 u32_destroy_key(tp, key);
365                                 return 0;
366                         }
367                 }
368         }
369         BUG_TRAP(0);
370         return 0;
371 }
372
373 static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
374 {
375         struct tc_u_knode *n;
376         unsigned h;
377
378         for (h=0; h<=ht->divisor; h++) {
379                 while ((n = ht->ht[h]) != NULL) {
380                         ht->ht[h] = n->next;
381
382                         u32_destroy_key(tp, n);
383                 }
384         }
385 }
386
387 static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
388 {
389         struct tc_u_common *tp_c = tp->data;
390         struct tc_u_hnode **hn;
391
392         BUG_TRAP(!ht->refcnt);
393
394         u32_clear_hnode(tp, ht);
395
396         for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) {
397                 if (*hn == ht) {
398                         *hn = ht->next;
399                         kfree(ht);
400                         return 0;
401                 }
402         }
403
404         BUG_TRAP(0);
405         return -ENOENT;
406 }
407
408 static void u32_destroy(struct tcf_proto *tp)
409 {
410         struct tc_u_common *tp_c = tp->data;
411         struct tc_u_hnode *root_ht = xchg(&tp->root, NULL);
412
413         BUG_TRAP(root_ht != NULL);
414
415         if (root_ht && --root_ht->refcnt == 0)
416                 u32_destroy_hnode(tp, root_ht);
417
418         if (--tp_c->refcnt == 0) {
419                 struct tc_u_hnode *ht;
420                 struct tc_u_common **tp_cp;
421
422                 for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) {
423                         if (*tp_cp == tp_c) {
424                                 *tp_cp = tp_c->next;
425                                 break;
426                         }
427                 }
428
429                 for (ht=tp_c->hlist; ht; ht = ht->next)
430                         u32_clear_hnode(tp, ht);
431
432                 while ((ht = tp_c->hlist) != NULL) {
433                         tp_c->hlist = ht->next;
434
435                         BUG_TRAP(ht->refcnt == 0);
436
437                         kfree(ht);
438                 };
439
440                 kfree(tp_c);
441         }
442
443         tp->data = NULL;
444 }
445
446 static int u32_delete(struct tcf_proto *tp, unsigned long arg)
447 {
448         struct tc_u_hnode *ht = (struct tc_u_hnode*)arg;
449
450         if (ht == NULL)
451                 return 0;
452
453         if (TC_U32_KEY(ht->handle))
454                 return u32_delete_key(tp, (struct tc_u_knode*)ht);
455
456         if (tp->root == ht)
457                 return -EINVAL;
458
459         if (--ht->refcnt == 0)
460                 u32_destroy_hnode(tp, ht);
461
462         return 0;
463 }
464
465 static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
466 {
467         struct tc_u_knode *n;
468         unsigned i = 0x7FF;
469
470         for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
471                 if (i < TC_U32_NODE(n->handle))
472                         i = TC_U32_NODE(n->handle);
473         i++;
474
475         return handle|(i>0xFFF ? 0xFFF : i);
476 }
477
478 static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
479                          struct tc_u_hnode *ht,
480                          struct tc_u_knode *n, struct rtattr **tb,
481                          struct rtattr *est)
482 {
483         int err;
484         struct tcf_exts e;
485
486         err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map);
487         if (err < 0)
488                 return err;
489
490         err = -EINVAL;
491         if (tb[TCA_U32_LINK-1]) {
492                 u32 handle = *(u32*)RTA_DATA(tb[TCA_U32_LINK-1]);
493                 struct tc_u_hnode *ht_down = NULL;
494
495                 if (TC_U32_KEY(handle))
496                         goto errout;
497
498                 if (handle) {
499                         ht_down = u32_lookup_ht(ht->tp_c, handle);
500
501                         if (ht_down == NULL)
502                                 goto errout;
503                         ht_down->refcnt++;
504                 }
505
506                 tcf_tree_lock(tp);
507                 ht_down = xchg(&n->ht_down, ht_down);
508                 tcf_tree_unlock(tp);
509
510                 if (ht_down)
511                         ht_down->refcnt--;
512         }
513         if (tb[TCA_U32_CLASSID-1]) {
514                 n->res.classid = *(u32*)RTA_DATA(tb[TCA_U32_CLASSID-1]);
515                 tcf_bind_filter(tp, &n->res, base);
516         }
517
518 #ifdef CONFIG_NET_CLS_IND
519         if (tb[TCA_U32_INDEV-1]) {
520                 int err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV-1]);
521                 if (err < 0)
522                         goto errout;
523         }
524 #endif
525         tcf_exts_change(tp, &n->exts, &e);
526
527         return 0;
528 errout:
529         tcf_exts_destroy(tp, &e);
530         return err;
531 }
532
533 static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
534                       struct rtattr **tca,
535                       unsigned long *arg)
536 {
537         struct tc_u_common *tp_c = tp->data;
538         struct tc_u_hnode *ht;
539         struct tc_u_knode *n;
540         struct tc_u32_sel *s;
541         struct rtattr *opt = tca[TCA_OPTIONS-1];
542         struct rtattr *tb[TCA_U32_MAX];
543         u32 htid;
544         int err;
545
546         if (opt == NULL)
547                 return handle ? -EINVAL : 0;
548
549         if (rtattr_parse_nested(tb, TCA_U32_MAX, opt) < 0)
550                 return -EINVAL;
551
552         if ((n = (struct tc_u_knode*)*arg) != NULL) {
553                 if (TC_U32_KEY(n->handle) == 0)
554                         return -EINVAL;
555
556                 return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE-1]);
557         }
558
559         if (tb[TCA_U32_DIVISOR-1]) {
560                 unsigned divisor = *(unsigned*)RTA_DATA(tb[TCA_U32_DIVISOR-1]);
561
562                 if (--divisor > 0x100)
563                         return -EINVAL;
564                 if (TC_U32_KEY(handle))
565                         return -EINVAL;
566                 if (handle == 0) {
567                         handle = gen_new_htid(tp->data);
568                         if (handle == 0)
569                                 return -ENOMEM;
570                 }
571                 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL);
572                 if (ht == NULL)
573                         return -ENOBUFS;
574                 ht->tp_c = tp_c;
575                 ht->refcnt = 0;
576                 ht->divisor = divisor;
577                 ht->handle = handle;
578                 ht->prio = tp->prio;
579                 ht->next = tp_c->hlist;
580                 tp_c->hlist = ht;
581                 *arg = (unsigned long)ht;
582                 return 0;
583         }
584
585         if (tb[TCA_U32_HASH-1]) {
586                 htid = *(unsigned*)RTA_DATA(tb[TCA_U32_HASH-1]);
587                 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
588                         ht = tp->root;
589                         htid = ht->handle;
590                 } else {
591                         ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
592                         if (ht == NULL)
593                                 return -EINVAL;
594                 }
595         } else {
596                 ht = tp->root;
597                 htid = ht->handle;
598         }
599
600         if (ht->divisor < TC_U32_HASH(htid))
601                 return -EINVAL;
602
603         if (handle) {
604                 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
605                         return -EINVAL;
606                 handle = htid | TC_U32_NODE(handle);
607         } else
608                 handle = gen_new_kid(ht, htid);
609
610         if (tb[TCA_U32_SEL-1] == 0 ||
611             RTA_PAYLOAD(tb[TCA_U32_SEL-1]) < sizeof(struct tc_u32_sel))
612                 return -EINVAL;
613
614         s = RTA_DATA(tb[TCA_U32_SEL-1]);
615
616         n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
617         if (n == NULL)
618                 return -ENOBUFS;
619
620 #ifdef CONFIG_CLS_U32_PERF
621         n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL);
622         if (n->pf == NULL) {
623                 kfree(n);
624                 return -ENOBUFS;
625         }
626 #endif
627
628         memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
629         n->ht_up = ht;
630         n->handle = handle;
631 {
632         u8 i = 0;
633         u32 mask = s->hmask;
634         if (mask) {
635                 while (!(mask & 1)) {
636                         i++;
637                         mask>>=1;
638                 }
639         }
640         n->fshift = i;
641 }
642
643 #ifdef CONFIG_CLS_U32_MARK
644         if (tb[TCA_U32_MARK-1]) {
645                 struct tc_u32_mark *mark;
646
647                 if (RTA_PAYLOAD(tb[TCA_U32_MARK-1]) < sizeof(struct tc_u32_mark)) {
648 #ifdef CONFIG_CLS_U32_PERF
649                         kfree(n->pf);
650 #endif
651                         kfree(n);
652                         return -EINVAL;
653                 }
654                 mark = RTA_DATA(tb[TCA_U32_MARK-1]);
655                 memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
656                 n->mark.success = 0;
657         }
658 #endif
659
660         err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE-1]);
661         if (err == 0) {
662                 struct tc_u_knode **ins;
663                 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
664                         if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
665                                 break;
666
667                 n->next = *ins;
668                 wmb();
669                 *ins = n;
670
671                 *arg = (unsigned long)n;
672                 return 0;
673         }
674 #ifdef CONFIG_CLS_U32_PERF
675         kfree(n->pf);
676 #endif
677         kfree(n);
678         return err;
679 }
680
681 static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
682 {
683         struct tc_u_common *tp_c = tp->data;
684         struct tc_u_hnode *ht;
685         struct tc_u_knode *n;
686         unsigned h;
687
688         if (arg->stop)
689                 return;
690
691         for (ht = tp_c->hlist; ht; ht = ht->next) {
692                 if (ht->prio != tp->prio)
693                         continue;
694                 if (arg->count >= arg->skip) {
695                         if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
696                                 arg->stop = 1;
697                                 return;
698                         }
699                 }
700                 arg->count++;
701                 for (h = 0; h <= ht->divisor; h++) {
702                         for (n = ht->ht[h]; n; n = n->next) {
703                                 if (arg->count < arg->skip) {
704                                         arg->count++;
705                                         continue;
706                                 }
707                                 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
708                                         arg->stop = 1;
709                                         return;
710                                 }
711                                 arg->count++;
712                         }
713                 }
714         }
715 }
716
717 static int u32_dump(struct tcf_proto *tp, unsigned long fh,
718                      struct sk_buff *skb, struct tcmsg *t)
719 {
720         struct tc_u_knode *n = (struct tc_u_knode*)fh;
721         unsigned char    *b = skb->tail;
722         struct rtattr *rta;
723
724         if (n == NULL)
725                 return skb->len;
726
727         t->tcm_handle = n->handle;
728
729         rta = (struct rtattr*)b;
730         RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
731
732         if (TC_U32_KEY(n->handle) == 0) {
733                 struct tc_u_hnode *ht = (struct tc_u_hnode*)fh;
734                 u32 divisor = ht->divisor+1;
735                 RTA_PUT(skb, TCA_U32_DIVISOR, 4, &divisor);
736         } else {
737                 RTA_PUT(skb, TCA_U32_SEL,
738                         sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
739                         &n->sel);
740                 if (n->ht_up) {
741                         u32 htid = n->handle & 0xFFFFF000;
742                         RTA_PUT(skb, TCA_U32_HASH, 4, &htid);
743                 }
744                 if (n->res.classid)
745                         RTA_PUT(skb, TCA_U32_CLASSID, 4, &n->res.classid);
746                 if (n->ht_down)
747                         RTA_PUT(skb, TCA_U32_LINK, 4, &n->ht_down->handle);
748
749 #ifdef CONFIG_CLS_U32_MARK
750                 if (n->mark.val || n->mark.mask)
751                         RTA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark);
752 #endif
753
754                 if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0)
755                         goto rtattr_failure;
756
757 #ifdef CONFIG_NET_CLS_IND
758                 if(strlen(n->indev))
759                         RTA_PUT(skb, TCA_U32_INDEV, IFNAMSIZ, n->indev);
760 #endif
761 #ifdef CONFIG_CLS_U32_PERF
762                 RTA_PUT(skb, TCA_U32_PCNT,
763                 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
764                         n->pf);
765 #endif
766         }
767
768         rta->rta_len = skb->tail - b;
769         if (TC_U32_KEY(n->handle))
770                 if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0)
771                         goto rtattr_failure;
772         return skb->len;
773
774 rtattr_failure:
775         skb_trim(skb, b - skb->data);
776         return -1;
777 }
778
779 static struct tcf_proto_ops cls_u32_ops = {
780         .next           =       NULL,
781         .kind           =       "u32",
782         .classify       =       u32_classify,
783         .init           =       u32_init,
784         .destroy        =       u32_destroy,
785         .get            =       u32_get,
786         .put            =       u32_put,
787         .change         =       u32_change,
788         .delete         =       u32_delete,
789         .walk           =       u32_walk,
790         .dump           =       u32_dump,
791         .owner          =       THIS_MODULE,
792 };
793
794 static int __init init_u32(void)
795 {
796         printk("u32 classifier\n");
797 #ifdef CONFIG_CLS_U32_PERF
798         printk("    Performance counters on\n");
799 #endif
800 #ifdef CONFIG_NET_CLS_POLICE
801         printk("    OLD policer on \n");
802 #endif
803 #ifdef CONFIG_NET_CLS_IND
804         printk("    input device check on \n");
805 #endif
806 #ifdef CONFIG_NET_CLS_ACT
807         printk("    Actions configured \n");
808 #endif
809         return register_tcf_proto_ops(&cls_u32_ops);
810 }
811
812 static void __exit exit_u32(void)
813 {
814         unregister_tcf_proto_ops(&cls_u32_ops);
815 }
816
817 module_init(init_u32)
818 module_exit(exit_u32)
819 MODULE_LICENSE("GPL");