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Linux v2.6.17-rc2
[linux-2.6/next.git] / net / sched / cls_u32.c
blob78e052591fa99c299da13011277249548d1885a8
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/config.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/kernel.h>
40 #include <linux/sched.h>
41 #include <linux/string.h>
42 #include <linux/mm.h>
43 #include <linux/socket.h>
44 #include <linux/sockios.h>
45 #include <linux/in.h>
46 #include <linux/errno.h>
47 #include <linux/interrupt.h>
48 #include <linux/if_ether.h>
49 #include <linux/inet.h>
50 #include <linux/netdevice.h>
51 #include <linux/etherdevice.h>
52 #include <linux/notifier.h>
53 #include <linux/rtnetlink.h>
54 #include <net/ip.h>
55 #include <net/route.h>
56 #include <linux/skbuff.h>
57 #include <net/sock.h>
58 #include <net/act_api.h>
59 #include <net/pkt_cls.h>
60
61 struct tc_u_knode
62 {
63 struct tc_u_knode *next;
64 u32 handle;
65 struct tc_u_hnode *ht_up;
66 struct tcf_exts exts;
67 #ifdef CONFIG_NET_CLS_IND
68 char indev[IFNAMSIZ];
69 #endif
70 u8 fshift;
71 struct tcf_result res;
72 struct tc_u_hnode *ht_down;
73 #ifdef CONFIG_CLS_U32_PERF
74 struct tc_u32_pcnt *pf;
75 #endif
76 #ifdef CONFIG_CLS_U32_MARK
77 struct tc_u32_mark mark;
78 #endif
79 struct tc_u32_sel sel;
80 };
81
82 struct tc_u_hnode
83 {
84 struct tc_u_hnode *next;
85 u32 handle;
86 u32 prio;
87 struct tc_u_common *tp_c;
88 int refcnt;
89 unsigned divisor;
90 struct tc_u_knode *ht[1];
91 };
92
93 struct tc_u_common
94 {
95 struct tc_u_common *next;
96 struct tc_u_hnode *hlist;
97 struct Qdisc *q;
98 int refcnt;
99 u32 hgenerator;
100 };
101
102 static struct tcf_ext_map u32_ext_map = {
103 .action = TCA_U32_ACT,
104 .police = TCA_U32_POLICE
105 };
106
107 static struct tc_u_common *u32_list;
108
109 static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift)
110 {
111 unsigned h = (key & sel->hmask)>>fshift;
112
113 return h;
114 }
115
116 static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
117 {
118 struct {
119 struct tc_u_knode *knode;
120 u8 *ptr;
121 } stack[TC_U32_MAXDEPTH];
122
123 struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root;
124 u8 *ptr = skb->nh.raw;
125 struct tc_u_knode *n;
126 int sdepth = 0;
127 int off2 = 0;
128 int sel = 0;
129 #ifdef CONFIG_CLS_U32_PERF
130 int j;
131 #endif
132 int i, r;
133
134 next_ht:
135 n = ht->ht[sel];
136
137 next_knode:
138 if (n) {
139 struct tc_u32_key *key = n->sel.keys;
140
141 #ifdef CONFIG_CLS_U32_PERF
142 n->pf->rcnt +=1;
143 j = 0;
144 #endif
145
146 #ifdef CONFIG_CLS_U32_MARK
147 if ((skb->nfmark & n->mark.mask) != n->mark.val) {
148 n = n->next;
149 goto next_knode;
150 } else {
151 n->mark.success++;
152 }
153 #endif
154
155 for (i = n->sel.nkeys; i>0; i--, key++) {
156
157 if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) {
158 n = n->next;
159 goto next_knode;
160 }
161 #ifdef CONFIG_CLS_U32_PERF
162 n->pf->kcnts[j] +=1;
163 j++;
164 #endif
165 }
166 if (n->ht_down == NULL) {
167 check_terminal:
168 if (n->sel.flags&TC_U32_TERMINAL) {
169
170 *res = n->res;
171 #ifdef CONFIG_NET_CLS_IND
172 if (!tcf_match_indev(skb, n->indev)) {
173 n = n->next;
174 goto next_knode;
175 }
176 #endif
177 #ifdef CONFIG_CLS_U32_PERF
178 n->pf->rhit +=1;
179 #endif
180 r = tcf_exts_exec(skb, &n->exts, res);
181 if (r < 0) {
182 n = n->next;
183 goto next_knode;
184 }
185
186 return r;
187 }
188 n = n->next;
189 goto next_knode;
190 }
191
192 /* PUSH */
193 if (sdepth >= TC_U32_MAXDEPTH)
194 goto deadloop;
195 stack[sdepth].knode = n;
196 stack[sdepth].ptr = ptr;
197 sdepth++;
198
199 ht = n->ht_down;
200 sel = 0;
201 if (ht->divisor)
202 sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift);
203
204 if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT)))
205 goto next_ht;
206
207 if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) {
208 off2 = n->sel.off + 3;
209 if (n->sel.flags&TC_U32_VAROFFSET)
210 off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift;
211 off2 &= ~3;
212 }
213 if (n->sel.flags&TC_U32_EAT) {
214 ptr += off2;
215 off2 = 0;
216 }
217
218 if (ptr < skb->tail)
219 goto next_ht;
220 }
221
222 /* POP */
223 if (sdepth--) {
224 n = stack[sdepth].knode;
225 ht = n->ht_up;
226 ptr = stack[sdepth].ptr;
227 goto check_terminal;
228 }
229 return -1;
230
231 deadloop:
232 if (net_ratelimit())
233 printk("cls_u32: dead loop\n");
234 return -1;
235 }
236
237 static __inline__ struct tc_u_hnode *
238 u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
239 {
240 struct tc_u_hnode *ht;
241
242 for (ht = tp_c->hlist; ht; ht = ht->next)
243 if (ht->handle == handle)
244 break;
245
246 return ht;
247 }
248
249 static __inline__ struct tc_u_knode *
250 u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
251 {
252 unsigned sel;
253 struct tc_u_knode *n = NULL;
254
255 sel = TC_U32_HASH(handle);
256 if (sel > ht->divisor)
257 goto out;
258
259 for (n = ht->ht[sel]; n; n = n->next)
260 if (n->handle == handle)
261 break;
262 out:
263 return n;
264 }
265
266
267 static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
268 {
269 struct tc_u_hnode *ht;
270 struct tc_u_common *tp_c = tp->data;
271
272 if (TC_U32_HTID(handle) == TC_U32_ROOT)
273 ht = tp->root;
274 else
275 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
276
277 if (!ht)
278 return 0;
279
280 if (TC_U32_KEY(handle) == 0)
281 return (unsigned long)ht;
282
283 return (unsigned long)u32_lookup_key(ht, handle);
284 }
285
286 static void u32_put(struct tcf_proto *tp, unsigned long f)
287 {
288 }
289
290 static u32 gen_new_htid(struct tc_u_common *tp_c)
291 {
292 int i = 0x800;
293
294 do {
295 if (++tp_c->hgenerator == 0x7FF)
296 tp_c->hgenerator = 1;
297 } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
298
299 return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
300 }
301
302 static int u32_init(struct tcf_proto *tp)
303 {
304 struct tc_u_hnode *root_ht;
305 struct tc_u_common *tp_c;
306
307 for (tp_c = u32_list; tp_c; tp_c = tp_c->next)
308 if (tp_c->q == tp->q)
309 break;
310
311 root_ht = kmalloc(sizeof(*root_ht), GFP_KERNEL);
312 if (root_ht == NULL)
313 return -ENOBUFS;
314
315 memset(root_ht, 0, sizeof(*root_ht));
316 root_ht->divisor = 0;
317 root_ht->refcnt++;
318 root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
319 root_ht->prio = tp->prio;
320
321 if (tp_c == NULL) {
322 tp_c = kmalloc(sizeof(*tp_c), GFP_KERNEL);
323 if (tp_c == NULL) {
324 kfree(root_ht);
325 return -ENOBUFS;
326 }
327 memset(tp_c, 0, sizeof(*tp_c));
328 tp_c->q = tp->q;
329 tp_c->next = u32_list;
330 u32_list = tp_c;
331 }
332
333 tp_c->refcnt++;
334 root_ht->next = tp_c->hlist;
335 tp_c->hlist = root_ht;
336 root_ht->tp_c = tp_c;
337
338 tp->root = root_ht;
339 tp->data = tp_c;
340 return 0;
341 }
342
343 static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n)
344 {
345 tcf_unbind_filter(tp, &n->res);
346 tcf_exts_destroy(tp, &n->exts);
347 if (n->ht_down)
348 n->ht_down->refcnt--;
349 #ifdef CONFIG_CLS_U32_PERF
350 kfree(n->pf);
351 #endif
352 kfree(n);
353 return 0;
354 }
355
356 static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
357 {
358 struct tc_u_knode **kp;
359 struct tc_u_hnode *ht = key->ht_up;
360
361 if (ht) {
362 for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) {
363 if (*kp == key) {
364 tcf_tree_lock(tp);
365 *kp = key->next;
366 tcf_tree_unlock(tp);
367
368 u32_destroy_key(tp, key);
369 return 0;
370 }
371 }
372 }
373 BUG_TRAP(0);
374 return 0;
375 }
376
377 static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
378 {
379 struct tc_u_knode *n;
380 unsigned h;
381
382 for (h=0; h<=ht->divisor; h++) {
383 while ((n = ht->ht[h]) != NULL) {
384 ht->ht[h] = n->next;
385
386 u32_destroy_key(tp, n);
387 }
388 }
389 }
390
391 static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
392 {
393 struct tc_u_common *tp_c = tp->data;
394 struct tc_u_hnode **hn;
395
396 BUG_TRAP(!ht->refcnt);
397
398 u32_clear_hnode(tp, ht);
399
400 for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) {
401 if (*hn == ht) {
402 *hn = ht->next;
403 kfree(ht);
404 return 0;
405 }
406 }
407
408 BUG_TRAP(0);
409 return -ENOENT;
410 }
411
412 static void u32_destroy(struct tcf_proto *tp)
413 {
414 struct tc_u_common *tp_c = tp->data;
415 struct tc_u_hnode *root_ht = xchg(&tp->root, NULL);
416
417 BUG_TRAP(root_ht != NULL);
418
419 if (root_ht && --root_ht->refcnt == 0)
420 u32_destroy_hnode(tp, root_ht);
421
422 if (--tp_c->refcnt == 0) {
423 struct tc_u_hnode *ht;
424 struct tc_u_common **tp_cp;
425
426 for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) {
427 if (*tp_cp == tp_c) {
428 *tp_cp = tp_c->next;
429 break;
430 }
431 }
432
433 for (ht=tp_c->hlist; ht; ht = ht->next)
434 u32_clear_hnode(tp, ht);
435
436 while ((ht = tp_c->hlist) != NULL) {
437 tp_c->hlist = ht->next;
438
439 BUG_TRAP(ht->refcnt == 0);
440
441 kfree(ht);
442 };
443
444 kfree(tp_c);
445 }
446
447 tp->data = NULL;
448 }
449
450 static int u32_delete(struct tcf_proto *tp, unsigned long arg)
451 {
452 struct tc_u_hnode *ht = (struct tc_u_hnode*)arg;
453
454 if (ht == NULL)
455 return 0;
456
457 if (TC_U32_KEY(ht->handle))
458 return u32_delete_key(tp, (struct tc_u_knode*)ht);
459
460 if (tp->root == ht)
461 return -EINVAL;
462
463 if (--ht->refcnt == 0)
464 u32_destroy_hnode(tp, ht);
465
466 return 0;
467 }
468
469 static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
470 {
471 struct tc_u_knode *n;
472 unsigned i = 0x7FF;
473
474 for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
475 if (i < TC_U32_NODE(n->handle))
476 i = TC_U32_NODE(n->handle);
477 i++;
478
479 return handle|(i>0xFFF ? 0xFFF : i);
480 }
481
482 static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
483 struct tc_u_hnode *ht,
484 struct tc_u_knode *n, struct rtattr **tb,
485 struct rtattr *est)
486 {
487 int err;
488 struct tcf_exts e;
489
490 err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map);
491 if (err < 0)
492 return err;
493
494 err = -EINVAL;
495 if (tb[TCA_U32_LINK-1]) {
496 u32 handle = *(u32*)RTA_DATA(tb[TCA_U32_LINK-1]);
497 struct tc_u_hnode *ht_down = NULL;
498
499 if (TC_U32_KEY(handle))
500 goto errout;
501
502 if (handle) {
503 ht_down = u32_lookup_ht(ht->tp_c, handle);
504
505 if (ht_down == NULL)
506 goto errout;
507 ht_down->refcnt++;
508 }
509
510 tcf_tree_lock(tp);
511 ht_down = xchg(&n->ht_down, ht_down);
512 tcf_tree_unlock(tp);
513
514 if (ht_down)
515 ht_down->refcnt--;
516 }
517 if (tb[TCA_U32_CLASSID-1]) {
518 n->res.classid = *(u32*)RTA_DATA(tb[TCA_U32_CLASSID-1]);
519 tcf_bind_filter(tp, &n->res, base);
520 }
521
522 #ifdef CONFIG_NET_CLS_IND
523 if (tb[TCA_U32_INDEV-1]) {
524 int err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV-1]);
525 if (err < 0)
526 goto errout;
527 }
528 #endif
529 tcf_exts_change(tp, &n->exts, &e);
530
531 return 0;
532 errout:
533 tcf_exts_destroy(tp, &e);
534 return err;
535 }
536
537 static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
538 struct rtattr **tca,
539 unsigned long *arg)
540 {
541 struct tc_u_common *tp_c = tp->data;
542 struct tc_u_hnode *ht;
543 struct tc_u_knode *n;
544 struct tc_u32_sel *s;
545 struct rtattr *opt = tca[TCA_OPTIONS-1];
546 struct rtattr *tb[TCA_U32_MAX];
547 u32 htid;
548 int err;
549
550 if (opt == NULL)
551 return handle ? -EINVAL : 0;
552
553 if (rtattr_parse_nested(tb, TCA_U32_MAX, opt) < 0)
554 return -EINVAL;
555
556 if ((n = (struct tc_u_knode*)*arg) != NULL) {
557 if (TC_U32_KEY(n->handle) == 0)
558 return -EINVAL;
559
560 return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE-1]);
561 }
562
563 if (tb[TCA_U32_DIVISOR-1]) {
564 unsigned divisor = *(unsigned*)RTA_DATA(tb[TCA_U32_DIVISOR-1]);
565
566 if (--divisor > 0x100)
567 return -EINVAL;
568 if (TC_U32_KEY(handle))
569 return -EINVAL;
570 if (handle == 0) {
571 handle = gen_new_htid(tp->data);
572 if (handle == 0)
573 return -ENOMEM;
574 }
575 ht = kmalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL);
576 if (ht == NULL)
577 return -ENOBUFS;
578 memset(ht, 0, sizeof(*ht) + divisor*sizeof(void*));
579 ht->tp_c = tp_c;
580 ht->refcnt = 0;
581 ht->divisor = divisor;
582 ht->handle = handle;
583 ht->prio = tp->prio;
584 ht->next = tp_c->hlist;
585 tp_c->hlist = ht;
586 *arg = (unsigned long)ht;
587 return 0;
588 }
589
590 if (tb[TCA_U32_HASH-1]) {
591 htid = *(unsigned*)RTA_DATA(tb[TCA_U32_HASH-1]);
592 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
593 ht = tp->root;
594 htid = ht->handle;
595 } else {
596 ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
597 if (ht == NULL)
598 return -EINVAL;
599 }
600 } else {
601 ht = tp->root;
602 htid = ht->handle;
603 }
604
605 if (ht->divisor < TC_U32_HASH(htid))
606 return -EINVAL;
607
608 if (handle) {
609 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
610 return -EINVAL;
611 handle = htid | TC_U32_NODE(handle);
612 } else
613 handle = gen_new_kid(ht, htid);
614
615 if (tb[TCA_U32_SEL-1] == 0 ||
616 RTA_PAYLOAD(tb[TCA_U32_SEL-1]) < sizeof(struct tc_u32_sel))
617 return -EINVAL;
618
619 s = RTA_DATA(tb[TCA_U32_SEL-1]);
620
621 n = kmalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
622 if (n == NULL)
623 return -ENOBUFS;
624
625 memset(n, 0, sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key));
626 #ifdef CONFIG_CLS_U32_PERF
627 n->pf = kmalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL);
628 if (n->pf == NULL) {
629 kfree(n);
630 return -ENOBUFS;
631 }
632 memset(n->pf, 0, sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64));
633 #endif
634
635 memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
636 n->ht_up = ht;
637 n->handle = handle;
638 {
639 u8 i = 0;
640 u32 mask = s->hmask;
641 if (mask) {
642 while (!(mask & 1)) {
643 i++;
644 mask>>=1;
645 }
646 }
647 n->fshift = i;
648 }
649
650 #ifdef CONFIG_CLS_U32_MARK
651 if (tb[TCA_U32_MARK-1]) {
652 struct tc_u32_mark *mark;
653
654 if (RTA_PAYLOAD(tb[TCA_U32_MARK-1]) < sizeof(struct tc_u32_mark)) {
655 #ifdef CONFIG_CLS_U32_PERF
656 kfree(n->pf);
657 #endif
658 kfree(n);
659 return -EINVAL;
660 }
661 mark = RTA_DATA(tb[TCA_U32_MARK-1]);
662 memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
663 n->mark.success = 0;
664 }
665 #endif
666
667 err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE-1]);
668 if (err == 0) {
669 struct tc_u_knode **ins;
670 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
671 if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
672 break;
673
674 n->next = *ins;
675 wmb();
676 *ins = n;
677
678 *arg = (unsigned long)n;
679 return 0;
680 }
681 #ifdef CONFIG_CLS_U32_PERF
682 kfree(n->pf);
683 #endif
684 kfree(n);
685 return err;
686 }
687
688 static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
689 {
690 struct tc_u_common *tp_c = tp->data;
691 struct tc_u_hnode *ht;
692 struct tc_u_knode *n;
693 unsigned h;
694
695 if (arg->stop)
696 return;
697
698 for (ht = tp_c->hlist; ht; ht = ht->next) {
699 if (ht->prio != tp->prio)
700 continue;
701 if (arg->count >= arg->skip) {
702 if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
703 arg->stop = 1;
704 return;
705 }
706 }
707 arg->count++;
708 for (h = 0; h <= ht->divisor; h++) {
709 for (n = ht->ht[h]; n; n = n->next) {
710 if (arg->count < arg->skip) {
711 arg->count++;
712 continue;
713 }
714 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
715 arg->stop = 1;
716 return;
717 }
718 arg->count++;
719 }
720 }
721 }
722 }
723
724 static int u32_dump(struct tcf_proto *tp, unsigned long fh,
725 struct sk_buff *skb, struct tcmsg *t)
726 {
727 struct tc_u_knode *n = (struct tc_u_knode*)fh;
728 unsigned char *b = skb->tail;
729 struct rtattr *rta;
730
731 if (n == NULL)
732 return skb->len;
733
734 t->tcm_handle = n->handle;
735
736 rta = (struct rtattr*)b;
737 RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
738
739 if (TC_U32_KEY(n->handle) == 0) {
740 struct tc_u_hnode *ht = (struct tc_u_hnode*)fh;
741 u32 divisor = ht->divisor+1;
742 RTA_PUT(skb, TCA_U32_DIVISOR, 4, &divisor);
743 } else {
744 RTA_PUT(skb, TCA_U32_SEL,
745 sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
746 &n->sel);
747 if (n->ht_up) {
748 u32 htid = n->handle & 0xFFFFF000;
749 RTA_PUT(skb, TCA_U32_HASH, 4, &htid);
750 }
751 if (n->res.classid)
752 RTA_PUT(skb, TCA_U32_CLASSID, 4, &n->res.classid);
753 if (n->ht_down)
754 RTA_PUT(skb, TCA_U32_LINK, 4, &n->ht_down->handle);
755
756 #ifdef CONFIG_CLS_U32_MARK
757 if (n->mark.val || n->mark.mask)
758 RTA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark);
759 #endif
760
761 if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0)
762 goto rtattr_failure;
763
764 #ifdef CONFIG_NET_CLS_IND
765 if(strlen(n->indev))
766 RTA_PUT(skb, TCA_U32_INDEV, IFNAMSIZ, n->indev);
767 #endif
768 #ifdef CONFIG_CLS_U32_PERF
769 RTA_PUT(skb, TCA_U32_PCNT,
770 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
771 n->pf);
772 #endif
773 }
774
775 rta->rta_len = skb->tail - b;
776 if (TC_U32_KEY(n->handle))
777 if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0)
778 goto rtattr_failure;
779 return skb->len;
780
781 rtattr_failure:
782 skb_trim(skb, b - skb->data);
783 return -1;
784 }
785
786 static struct tcf_proto_ops cls_u32_ops = {
787 .next = NULL,
788 .kind = "u32",
789 .classify = u32_classify,
790 .init = u32_init,
791 .destroy = u32_destroy,
792 .get = u32_get,
793 .put = u32_put,
794 .change = u32_change,
795 .delete = u32_delete,
796 .walk = u32_walk,
797 .dump = u32_dump,
798 .owner = THIS_MODULE,
799 };
800
801 static int __init init_u32(void)
802 {
803 printk("u32 classifier\n");
804 #ifdef CONFIG_CLS_U32_PERF
805 printk(" Perfomance counters on\n");
806 #endif
807 #ifdef CONFIG_NET_CLS_POLICE
808 printk(" OLD policer on \n");
809 #endif
810 #ifdef CONFIG_NET_CLS_IND
811 printk(" input device check on \n");
812 #endif
813 #ifdef CONFIG_NET_CLS_ACT
814 printk(" Actions configured \n");
815 #endif
816 return register_tcf_proto_ops(&cls_u32_ops);
817 }
818
819 static void __exit exit_u32(void)
820 {
821 unregister_tcf_proto_ops(&cls_u32_ops);
822 }
823
824 module_init(init_u32)
825 module_exit(exit_u32)
826 MODULE_LICENSE("GPL");
linux-next