62e1deb27a17df67d05e274fe38e94a5a1707ee9
[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 <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/netlink.h>
54 #include <net/route.h>
55 #include <linux/skbuff.h>
56 #include <net/sock.h>
57 #include <net/act_api.h>
58 #include <net/pkt_cls.h>
59
60 struct tc_u_knode
61 {
62         struct tc_u_knode       *next;
63         u32                     handle;
64         struct tc_u_hnode       *ht_up;
65         struct tcf_exts         exts;
66 #ifdef CONFIG_NET_CLS_IND
67         char                     indev[IFNAMSIZ];
68 #endif
69         u8                      fshift;
70         struct tcf_result       res;
71         struct tc_u_hnode       *ht_down;
72 #ifdef CONFIG_CLS_U32_PERF
73         struct tc_u32_pcnt      *pf;
74 #endif
75 #ifdef CONFIG_CLS_U32_MARK
76         struct tc_u32_mark      mark;
77 #endif
78         struct tc_u32_sel       sel;
79 };
80
81 struct tc_u_hnode
82 {
83         struct tc_u_hnode       *next;
84         u32                     handle;
85         u32                     prio;
86         struct tc_u_common      *tp_c;
87         int                     refcnt;
88         unsigned                divisor;
89         struct tc_u_knode       *ht[1];
90 };
91
92 struct tc_u_common
93 {
94         struct tc_u_common      *next;
95         struct tc_u_hnode       *hlist;
96         struct Qdisc            *q;
97         int                     refcnt;
98         u32                     hgenerator;
99 };
100
101 static struct tcf_ext_map u32_ext_map = {
102         .action = TCA_U32_ACT,
103         .police = TCA_U32_POLICE
104 };
105
106 static struct tc_u_common *u32_list;
107
108 static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift)
109 {
110         unsigned h = (key & sel->hmask)>>fshift;
111
112         return h;
113 }
114
115 static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
116 {
117         struct {
118                 struct tc_u_knode *knode;
119                 u8                *ptr;
120         } stack[TC_U32_MAXDEPTH];
121
122         struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root;
123         u8 *ptr = skb_network_header(skb);
124         struct tc_u_knode *n;
125         int sdepth = 0;
126         int off2 = 0;
127         int sel = 0;
128 #ifdef CONFIG_CLS_U32_PERF
129         int j;
130 #endif
131         int i, r;
132
133 next_ht:
134         n = ht->ht[sel];
135
136 next_knode:
137         if (n) {
138                 struct tc_u32_key *key = n->sel.keys;
139
140 #ifdef CONFIG_CLS_U32_PERF
141                 n->pf->rcnt +=1;
142                 j = 0;
143 #endif
144
145 #ifdef CONFIG_CLS_U32_MARK
146                 if ((skb->mark & n->mark.mask) != n->mark.val) {
147                         n = n->next;
148                         goto next_knode;
149                 } else {
150                         n->mark.success++;
151                 }
152 #endif
153
154                 for (i = n->sel.nkeys; i>0; i--, key++) {
155
156                         if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) {
157                                 n = n->next;
158                                 goto next_knode;
159                         }
160 #ifdef CONFIG_CLS_U32_PERF
161                         n->pf->kcnts[j] +=1;
162                         j++;
163 #endif
164                 }
165                 if (n->ht_down == NULL) {
166 check_terminal:
167                         if (n->sel.flags&TC_U32_TERMINAL) {
168
169                                 *res = n->res;
170 #ifdef CONFIG_NET_CLS_IND
171                                 if (!tcf_match_indev(skb, n->indev)) {
172                                         n = n->next;
173                                         goto next_knode;
174                                 }
175 #endif
176 #ifdef CONFIG_CLS_U32_PERF
177                                 n->pf->rhit +=1;
178 #endif
179                                 r = tcf_exts_exec(skb, &n->exts, res);
180                                 if (r < 0) {
181                                         n = n->next;
182                                         goto next_knode;
183                                 }
184
185                                 return r;
186                         }
187                         n = n->next;
188                         goto next_knode;
189                 }
190
191                 /* PUSH */
192                 if (sdepth >= TC_U32_MAXDEPTH)
193                         goto deadloop;
194                 stack[sdepth].knode = n;
195                 stack[sdepth].ptr = ptr;
196                 sdepth++;
197
198                 ht = n->ht_down;
199                 sel = 0;
200                 if (ht->divisor)
201                         sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift);
202
203                 if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT)))
204                         goto next_ht;
205
206                 if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) {
207                         off2 = n->sel.off + 3;
208                         if (n->sel.flags&TC_U32_VAROFFSET)
209                                 off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift;
210                         off2 &= ~3;
211                 }
212                 if (n->sel.flags&TC_U32_EAT) {
213                         ptr += off2;
214                         off2 = 0;
215                 }
216
217                 if (ptr < skb_tail_pointer(skb))
218                         goto next_ht;
219         }
220
221         /* POP */
222         if (sdepth--) {
223                 n = stack[sdepth].knode;
224                 ht = n->ht_up;
225                 ptr = stack[sdepth].ptr;
226                 goto check_terminal;
227         }
228         return -1;
229
230 deadloop:
231         if (net_ratelimit())
232                 printk("cls_u32: dead loop\n");
233         return -1;
234 }
235
236 static __inline__ struct tc_u_hnode *
237 u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
238 {
239         struct tc_u_hnode *ht;
240
241         for (ht = tp_c->hlist; ht; ht = ht->next)
242                 if (ht->handle == handle)
243                         break;
244
245         return ht;
246 }
247
248 static __inline__ struct tc_u_knode *
249 u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
250 {
251         unsigned sel;
252         struct tc_u_knode *n = NULL;
253
254         sel = TC_U32_HASH(handle);
255         if (sel > ht->divisor)
256                 goto out;
257
258         for (n = ht->ht[sel]; n; n = n->next)
259                 if (n->handle == handle)
260                         break;
261 out:
262         return n;
263 }
264
265
266 static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
267 {
268         struct tc_u_hnode *ht;
269         struct tc_u_common *tp_c = tp->data;
270
271         if (TC_U32_HTID(handle) == TC_U32_ROOT)
272                 ht = tp->root;
273         else
274                 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
275
276         if (!ht)
277                 return 0;
278
279         if (TC_U32_KEY(handle) == 0)
280                 return (unsigned long)ht;
281
282         return (unsigned long)u32_lookup_key(ht, handle);
283 }
284
285 static void u32_put(struct tcf_proto *tp, unsigned long f)
286 {
287 }
288
289 static u32 gen_new_htid(struct tc_u_common *tp_c)
290 {
291         int i = 0x800;
292
293         do {
294                 if (++tp_c->hgenerator == 0x7FF)
295                         tp_c->hgenerator = 1;
296         } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
297
298         return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
299 }
300
301 static int u32_init(struct tcf_proto *tp)
302 {
303         struct tc_u_hnode *root_ht;
304         struct tc_u_common *tp_c;
305
306         for (tp_c = u32_list; tp_c; tp_c = tp_c->next)
307                 if (tp_c->q == tp->q)
308                         break;
309
310         root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
311         if (root_ht == NULL)
312                 return -ENOBUFS;
313
314         root_ht->divisor = 0;
315         root_ht->refcnt++;
316         root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
317         root_ht->prio = tp->prio;
318
319         if (tp_c == NULL) {
320                 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
321                 if (tp_c == NULL) {
322                         kfree(root_ht);
323                         return -ENOBUFS;
324                 }
325                 tp_c->q = tp->q;
326                 tp_c->next = u32_list;
327                 u32_list = tp_c;
328         }
329
330         tp_c->refcnt++;
331         root_ht->next = tp_c->hlist;
332         tp_c->hlist = root_ht;
333         root_ht->tp_c = tp_c;
334
335         tp->root = root_ht;
336         tp->data = tp_c;
337         return 0;
338 }
339
340 static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n)
341 {
342         tcf_unbind_filter(tp, &n->res);
343         tcf_exts_destroy(tp, &n->exts);
344         if (n->ht_down)
345                 n->ht_down->refcnt--;
346 #ifdef CONFIG_CLS_U32_PERF
347         kfree(n->pf);
348 #endif
349         kfree(n);
350         return 0;
351 }
352
353 static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
354 {
355         struct tc_u_knode **kp;
356         struct tc_u_hnode *ht = key->ht_up;
357
358         if (ht) {
359                 for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) {
360                         if (*kp == key) {
361                                 tcf_tree_lock(tp);
362                                 *kp = key->next;
363                                 tcf_tree_unlock(tp);
364
365                                 u32_destroy_key(tp, key);
366                                 return 0;
367                         }
368                 }
369         }
370         BUG_TRAP(0);
371         return 0;
372 }
373
374 static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
375 {
376         struct tc_u_knode *n;
377         unsigned h;
378
379         for (h=0; h<=ht->divisor; h++) {
380                 while ((n = ht->ht[h]) != NULL) {
381                         ht->ht[h] = n->next;
382
383                         u32_destroy_key(tp, n);
384                 }
385         }
386 }
387
388 static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
389 {
390         struct tc_u_common *tp_c = tp->data;
391         struct tc_u_hnode **hn;
392
393         BUG_TRAP(!ht->refcnt);
394
395         u32_clear_hnode(tp, ht);
396
397         for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) {
398                 if (*hn == ht) {
399                         *hn = ht->next;
400                         kfree(ht);
401                         return 0;
402                 }
403         }
404
405         BUG_TRAP(0);
406         return -ENOENT;
407 }
408
409 static void u32_destroy(struct tcf_proto *tp)
410 {
411         struct tc_u_common *tp_c = tp->data;
412         struct tc_u_hnode *root_ht = xchg(&tp->root, NULL);
413
414         BUG_TRAP(root_ht != NULL);
415
416         if (root_ht && --root_ht->refcnt == 0)
417                 u32_destroy_hnode(tp, root_ht);
418
419         if (--tp_c->refcnt == 0) {
420                 struct tc_u_hnode *ht;
421                 struct tc_u_common **tp_cp;
422
423                 for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) {
424                         if (*tp_cp == tp_c) {
425                                 *tp_cp = tp_c->next;
426                                 break;
427                         }
428                 }
429
430                 for (ht=tp_c->hlist; ht; ht = ht->next)
431                         u32_clear_hnode(tp, ht);
432
433                 while ((ht = tp_c->hlist) != NULL) {
434                         tp_c->hlist = ht->next;
435
436                         BUG_TRAP(ht->refcnt == 0);
437
438                         kfree(ht);
439                 };
440
441                 kfree(tp_c);
442         }
443
444         tp->data = NULL;
445 }
446
447 static int u32_delete(struct tcf_proto *tp, unsigned long arg)
448 {
449         struct tc_u_hnode *ht = (struct tc_u_hnode*)arg;
450
451         if (ht == NULL)
452                 return 0;
453
454         if (TC_U32_KEY(ht->handle))
455                 return u32_delete_key(tp, (struct tc_u_knode*)ht);
456
457         if (tp->root == ht)
458                 return -EINVAL;
459
460         if (--ht->refcnt == 0)
461                 u32_destroy_hnode(tp, ht);
462
463         return 0;
464 }
465
466 static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
467 {
468         struct tc_u_knode *n;
469         unsigned i = 0x7FF;
470
471         for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
472                 if (i < TC_U32_NODE(n->handle))
473                         i = TC_U32_NODE(n->handle);
474         i++;
475
476         return handle|(i>0xFFF ? 0xFFF : i);
477 }
478
479 static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
480                          struct tc_u_hnode *ht,
481                          struct tc_u_knode *n, struct rtattr **tb,
482                          struct rtattr *est)
483 {
484         int err;
485         struct tcf_exts e;
486
487         err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map);
488         if (err < 0)
489                 return err;
490
491         err = -EINVAL;
492         if (tb[TCA_U32_LINK-1]) {
493                 u32 handle = *(u32*)RTA_DATA(tb[TCA_U32_LINK-1]);
494                 struct tc_u_hnode *ht_down = NULL;
495
496                 if (TC_U32_KEY(handle))
497                         goto errout;
498
499                 if (handle) {
500                         ht_down = u32_lookup_ht(ht->tp_c, handle);
501
502                         if (ht_down == NULL)
503                                 goto errout;
504                         ht_down->refcnt++;
505                 }
506
507                 tcf_tree_lock(tp);
508                 ht_down = xchg(&n->ht_down, ht_down);
509                 tcf_tree_unlock(tp);
510
511                 if (ht_down)
512                         ht_down->refcnt--;
513         }
514         if (tb[TCA_U32_CLASSID-1]) {
515                 n->res.classid = *(u32*)RTA_DATA(tb[TCA_U32_CLASSID-1]);
516                 tcf_bind_filter(tp, &n->res, base);
517         }
518
519 #ifdef CONFIG_NET_CLS_IND
520         if (tb[TCA_U32_INDEV-1]) {
521                 int err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV-1]);
522                 if (err < 0)
523                         goto errout;
524         }
525 #endif
526         tcf_exts_change(tp, &n->exts, &e);
527
528         return 0;
529 errout:
530         tcf_exts_destroy(tp, &e);
531         return err;
532 }
533
534 static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
535                       struct rtattr **tca,
536                       unsigned long *arg)
537 {
538         struct tc_u_common *tp_c = tp->data;
539         struct tc_u_hnode *ht;
540         struct tc_u_knode *n;
541         struct tc_u32_sel *s;
542         struct rtattr *opt = tca[TCA_OPTIONS-1];
543         struct rtattr *tb[TCA_U32_MAX];
544         u32 htid;
545         int err;
546
547         if (opt == NULL)
548                 return handle ? -EINVAL : 0;
549
550         if (rtattr_parse_nested(tb, TCA_U32_MAX, opt) < 0)
551                 return -EINVAL;
552
553         if ((n = (struct tc_u_knode*)*arg) != NULL) {
554                 if (TC_U32_KEY(n->handle) == 0)
555                         return -EINVAL;
556
557                 return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE-1]);
558         }
559
560         if (tb[TCA_U32_DIVISOR-1]) {
561                 unsigned divisor = *(unsigned*)RTA_DATA(tb[TCA_U32_DIVISOR-1]);
562
563                 if (--divisor > 0x100)
564                         return -EINVAL;
565                 if (TC_U32_KEY(handle))
566                         return -EINVAL;
567                 if (handle == 0) {
568                         handle = gen_new_htid(tp->data);
569                         if (handle == 0)
570                                 return -ENOMEM;
571                 }
572                 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL);
573                 if (ht == NULL)
574                         return -ENOBUFS;
575                 ht->tp_c = tp_c;
576                 ht->refcnt = 0;
577                 ht->divisor = divisor;
578                 ht->handle = handle;
579                 ht->prio = tp->prio;
580                 ht->next = tp_c->hlist;
581                 tp_c->hlist = ht;
582                 *arg = (unsigned long)ht;
583                 return 0;
584         }
585
586         if (tb[TCA_U32_HASH-1]) {
587                 htid = *(unsigned*)RTA_DATA(tb[TCA_U32_HASH-1]);
588                 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
589                         ht = tp->root;
590                         htid = ht->handle;
591                 } else {
592                         ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
593                         if (ht == NULL)
594                                 return -EINVAL;
595                 }
596         } else {
597                 ht = tp->root;
598                 htid = ht->handle;
599         }
600
601         if (ht->divisor < TC_U32_HASH(htid))
602                 return -EINVAL;
603
604         if (handle) {
605                 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
606                         return -EINVAL;
607                 handle = htid | TC_U32_NODE(handle);
608         } else
609                 handle = gen_new_kid(ht, htid);
610
611         if (tb[TCA_U32_SEL-1] == 0 ||
612             RTA_PAYLOAD(tb[TCA_U32_SEL-1]) < sizeof(struct tc_u32_sel))
613                 return -EINVAL;
614
615         s = RTA_DATA(tb[TCA_U32_SEL-1]);
616
617         n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
618         if (n == NULL)
619                 return -ENOBUFS;
620
621 #ifdef CONFIG_CLS_U32_PERF
622         n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL);
623         if (n->pf == NULL) {
624                 kfree(n);
625                 return -ENOBUFS;
626         }
627 #endif
628
629         memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
630         n->ht_up = ht;
631         n->handle = handle;
632 {
633         u8 i = 0;
634         u32 mask = s->hmask;
635         if (mask) {
636                 while (!(mask & 1)) {
637                         i++;
638                         mask>>=1;
639                 }
640         }
641         n->fshift = i;
642 }
643
644 #ifdef CONFIG_CLS_U32_MARK
645         if (tb[TCA_U32_MARK-1]) {
646                 struct tc_u32_mark *mark;
647
648                 if (RTA_PAYLOAD(tb[TCA_U32_MARK-1]) < sizeof(struct tc_u32_mark)) {
649 #ifdef CONFIG_CLS_U32_PERF
650                         kfree(n->pf);
651 #endif
652                         kfree(n);
653                         return -EINVAL;
654                 }
655                 mark = RTA_DATA(tb[TCA_U32_MARK-1]);
656                 memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
657                 n->mark.success = 0;
658         }
659 #endif
660
661         err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE-1]);
662         if (err == 0) {
663                 struct tc_u_knode **ins;
664                 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
665                         if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
666                                 break;
667
668                 n->next = *ins;
669                 wmb();
670                 *ins = n;
671
672                 *arg = (unsigned long)n;
673                 return 0;
674         }
675 #ifdef CONFIG_CLS_U32_PERF
676         kfree(n->pf);
677 #endif
678         kfree(n);
679         return err;
680 }
681
682 static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
683 {
684         struct tc_u_common *tp_c = tp->data;
685         struct tc_u_hnode *ht;
686         struct tc_u_knode *n;
687         unsigned h;
688
689         if (arg->stop)
690                 return;
691
692         for (ht = tp_c->hlist; ht; ht = ht->next) {
693                 if (ht->prio != tp->prio)
694                         continue;
695                 if (arg->count >= arg->skip) {
696                         if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
697                                 arg->stop = 1;
698                                 return;
699                         }
700                 }
701                 arg->count++;
702                 for (h = 0; h <= ht->divisor; h++) {
703                         for (n = ht->ht[h]; n; n = n->next) {
704                                 if (arg->count < arg->skip) {
705                                         arg->count++;
706                                         continue;
707                                 }
708                                 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
709                                         arg->stop = 1;
710                                         return;
711                                 }
712                                 arg->count++;
713                         }
714                 }
715         }
716 }
717
718 static int u32_dump(struct tcf_proto *tp, unsigned long fh,
719                      struct sk_buff *skb, struct tcmsg *t)
720 {
721         struct tc_u_knode *n = (struct tc_u_knode*)fh;
722         unsigned char *b = skb_tail_pointer(skb);
723         struct rtattr *rta;
724
725         if (n == NULL)
726                 return skb->len;
727
728         t->tcm_handle = n->handle;
729
730         rta = (struct rtattr*)b;
731         RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
732
733         if (TC_U32_KEY(n->handle) == 0) {
734                 struct tc_u_hnode *ht = (struct tc_u_hnode*)fh;
735                 u32 divisor = ht->divisor+1;
736                 RTA_PUT(skb, TCA_U32_DIVISOR, 4, &divisor);
737         } else {
738                 RTA_PUT(skb, TCA_U32_SEL,
739                         sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
740                         &n->sel);
741                 if (n->ht_up) {
742                         u32 htid = n->handle & 0xFFFFF000;
743                         RTA_PUT(skb, TCA_U32_HASH, 4, &htid);
744                 }
745                 if (n->res.classid)
746                         RTA_PUT(skb, TCA_U32_CLASSID, 4, &n->res.classid);
747                 if (n->ht_down)
748                         RTA_PUT(skb, TCA_U32_LINK, 4, &n->ht_down->handle);
749
750 #ifdef CONFIG_CLS_U32_MARK
751                 if (n->mark.val || n->mark.mask)
752                         RTA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark);
753 #endif
754
755                 if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0)
756                         goto rtattr_failure;
757
758 #ifdef CONFIG_NET_CLS_IND
759                 if(strlen(n->indev))
760                         RTA_PUT(skb, TCA_U32_INDEV, IFNAMSIZ, n->indev);
761 #endif
762 #ifdef CONFIG_CLS_U32_PERF
763                 RTA_PUT(skb, TCA_U32_PCNT,
764                 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
765                         n->pf);
766 #endif
767         }
768
769         rta->rta_len = skb_tail_pointer(skb) - b;
770         if (TC_U32_KEY(n->handle))
771                 if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0)
772                         goto rtattr_failure;
773         return skb->len;
774
775 rtattr_failure:
776         nlmsg_trim(skb, b);
777         return -1;
778 }
779
780 static struct tcf_proto_ops cls_u32_ops = {
781         .next           =       NULL,
782         .kind           =       "u32",
783         .classify       =       u32_classify,
784         .init           =       u32_init,
785         .destroy        =       u32_destroy,
786         .get            =       u32_get,
787         .put            =       u32_put,
788         .change         =       u32_change,
789         .delete         =       u32_delete,
790         .walk           =       u32_walk,
791         .dump           =       u32_dump,
792         .owner          =       THIS_MODULE,
793 };
794
795 static int __init init_u32(void)
796 {
797         printk("u32 classifier\n");
798 #ifdef CONFIG_CLS_U32_PERF
799         printk("    Performance counters on\n");
800 #endif
801 #ifdef CONFIG_NET_CLS_POLICE
802         printk("    OLD policer on \n");
803 #endif
804 #ifdef CONFIG_NET_CLS_IND
805         printk("    input device check on \n");
806 #endif
807 #ifdef CONFIG_NET_CLS_ACT
808         printk("    Actions configured \n");
809 #endif
810         return register_tcf_proto_ops(&cls_u32_ops);
811 }
812
813 static void __exit exit_u32(void)
814 {
815         unregister_tcf_proto_ops(&cls_u32_ops);
816 }
817
818 module_init(init_u32)
819 module_exit(exit_u32)
820 MODULE_LICENSE("GPL");