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[PATCH] md: fix various bugs with aligned reads in RAID5
[wrt350n-kernel.git] / net / sched / cls_u32.c
blob8b51948019958b39f182a6119735cc7a50c94a22
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/sched.h>
40 #include <linux/string.h>
41 #include <linux/mm.h>
42 #include <linux/socket.h>
43 #include <linux/sockios.h>
44 #include <linux/in.h>
45 #include <linux/errno.h>
46 #include <linux/interrupt.h>
47 #include <linux/if_ether.h>
48 #include <linux/inet.h>
49 #include <linux/netdevice.h>
50 #include <linux/etherdevice.h>
51 #include <linux/notifier.h>
52 #include <linux/rtnetlink.h>
53 #include <net/ip.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->nh.raw;
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)
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;
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 - 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 skb_trim(skb, b - skb->data);
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");
WRT350N Kernel Patches