blob: e8a7756891234dd2f74e23fbb3cc608ec77241da [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/module.h>
34#include <linux/types.h>
35#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/rtnetlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/skbuff.h>
Patrick McHardy0ba48052007-07-02 22:49:07 -070040#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#include <net/act_api.h>
42#include <net/pkt_cls.h>
43
44struct tc_u_knode
45{
46 struct tc_u_knode *next;
47 u32 handle;
48 struct tc_u_hnode *ht_up;
49 struct tcf_exts exts;
50#ifdef CONFIG_NET_CLS_IND
51 char indev[IFNAMSIZ];
52#endif
53 u8 fshift;
54 struct tcf_result res;
55 struct tc_u_hnode *ht_down;
56#ifdef CONFIG_CLS_U32_PERF
57 struct tc_u32_pcnt *pf;
58#endif
59#ifdef CONFIG_CLS_U32_MARK
60 struct tc_u32_mark mark;
61#endif
62 struct tc_u32_sel sel;
63};
64
65struct tc_u_hnode
66{
67 struct tc_u_hnode *next;
68 u32 handle;
69 u32 prio;
70 struct tc_u_common *tp_c;
71 int refcnt;
72 unsigned divisor;
73 struct tc_u_knode *ht[1];
74};
75
76struct tc_u_common
77{
78 struct tc_u_common *next;
79 struct tc_u_hnode *hlist;
80 struct Qdisc *q;
81 int refcnt;
82 u32 hgenerator;
83};
84
85static struct tcf_ext_map u32_ext_map = {
86 .action = TCA_U32_ACT,
87 .police = TCA_U32_POLICE
88};
89
90static struct tc_u_common *u32_list;
91
92static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift)
93{
Radu Rendec543821c2007-11-07 01:20:12 -080094 unsigned h = ntohl(key & sel->hmask)>>fshift;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095
96 return h;
97}
98
99static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
100{
101 struct {
102 struct tc_u_knode *knode;
103 u8 *ptr;
104 } stack[TC_U32_MAXDEPTH];
105
106 struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root;
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700107 u8 *ptr = skb_network_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 struct tc_u_knode *n;
109 int sdepth = 0;
110 int off2 = 0;
111 int sel = 0;
112#ifdef CONFIG_CLS_U32_PERF
113 int j;
114#endif
115 int i, r;
116
117next_ht:
118 n = ht->ht[sel];
119
120next_knode:
121 if (n) {
122 struct tc_u32_key *key = n->sel.keys;
123
124#ifdef CONFIG_CLS_U32_PERF
125 n->pf->rcnt +=1;
126 j = 0;
127#endif
128
129#ifdef CONFIG_CLS_U32_MARK
Thomas Graf82e91ff2006-11-09 15:19:14 -0800130 if ((skb->mark & n->mark.mask) != n->mark.val) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 n = n->next;
132 goto next_knode;
133 } else {
134 n->mark.success++;
135 }
136#endif
137
138 for (i = n->sel.nkeys; i>0; i--, key++) {
139
140 if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) {
141 n = n->next;
142 goto next_knode;
143 }
144#ifdef CONFIG_CLS_U32_PERF
145 n->pf->kcnts[j] +=1;
146 j++;
147#endif
148 }
149 if (n->ht_down == NULL) {
150check_terminal:
151 if (n->sel.flags&TC_U32_TERMINAL) {
152
153 *res = n->res;
154#ifdef CONFIG_NET_CLS_IND
155 if (!tcf_match_indev(skb, n->indev)) {
156 n = n->next;
157 goto next_knode;
158 }
159#endif
160#ifdef CONFIG_CLS_U32_PERF
161 n->pf->rhit +=1;
162#endif
163 r = tcf_exts_exec(skb, &n->exts, res);
164 if (r < 0) {
165 n = n->next;
166 goto next_knode;
167 }
168
169 return r;
170 }
171 n = n->next;
172 goto next_knode;
173 }
174
175 /* PUSH */
176 if (sdepth >= TC_U32_MAXDEPTH)
177 goto deadloop;
178 stack[sdepth].knode = n;
179 stack[sdepth].ptr = ptr;
180 sdepth++;
181
182 ht = n->ht_down;
183 sel = 0;
184 if (ht->divisor)
185 sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift);
186
187 if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT)))
188 goto next_ht;
189
190 if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) {
191 off2 = n->sel.off + 3;
192 if (n->sel.flags&TC_U32_VAROFFSET)
193 off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift;
194 off2 &= ~3;
195 }
196 if (n->sel.flags&TC_U32_EAT) {
197 ptr += off2;
198 off2 = 0;
199 }
200
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700201 if (ptr < skb_tail_pointer(skb))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 goto next_ht;
203 }
204
205 /* POP */
206 if (sdepth--) {
207 n = stack[sdepth].knode;
208 ht = n->ht_up;
209 ptr = stack[sdepth].ptr;
210 goto check_terminal;
211 }
212 return -1;
213
214deadloop:
215 if (net_ratelimit())
216 printk("cls_u32: dead loop\n");
217 return -1;
218}
219
220static __inline__ struct tc_u_hnode *
221u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
222{
223 struct tc_u_hnode *ht;
224
225 for (ht = tp_c->hlist; ht; ht = ht->next)
226 if (ht->handle == handle)
227 break;
228
229 return ht;
230}
231
232static __inline__ struct tc_u_knode *
233u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
234{
235 unsigned sel;
236 struct tc_u_knode *n = NULL;
237
238 sel = TC_U32_HASH(handle);
239 if (sel > ht->divisor)
240 goto out;
241
242 for (n = ht->ht[sel]; n; n = n->next)
243 if (n->handle == handle)
244 break;
245out:
246 return n;
247}
248
249
250static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
251{
252 struct tc_u_hnode *ht;
253 struct tc_u_common *tp_c = tp->data;
254
255 if (TC_U32_HTID(handle) == TC_U32_ROOT)
256 ht = tp->root;
257 else
258 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
259
260 if (!ht)
261 return 0;
262
263 if (TC_U32_KEY(handle) == 0)
264 return (unsigned long)ht;
265
266 return (unsigned long)u32_lookup_key(ht, handle);
267}
268
269static void u32_put(struct tcf_proto *tp, unsigned long f)
270{
271}
272
273static u32 gen_new_htid(struct tc_u_common *tp_c)
274{
275 int i = 0x800;
276
277 do {
278 if (++tp_c->hgenerator == 0x7FF)
279 tp_c->hgenerator = 1;
280 } while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
281
282 return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
283}
284
285static int u32_init(struct tcf_proto *tp)
286{
287 struct tc_u_hnode *root_ht;
288 struct tc_u_common *tp_c;
289
290 for (tp_c = u32_list; tp_c; tp_c = tp_c->next)
291 if (tp_c->q == tp->q)
292 break;
293
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700294 root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 if (root_ht == NULL)
296 return -ENOBUFS;
297
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 root_ht->divisor = 0;
299 root_ht->refcnt++;
300 root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
301 root_ht->prio = tp->prio;
302
303 if (tp_c == NULL) {
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700304 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 if (tp_c == NULL) {
306 kfree(root_ht);
307 return -ENOBUFS;
308 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 tp_c->q = tp->q;
310 tp_c->next = u32_list;
311 u32_list = tp_c;
312 }
313
314 tp_c->refcnt++;
315 root_ht->next = tp_c->hlist;
316 tp_c->hlist = root_ht;
317 root_ht->tp_c = tp_c;
318
319 tp->root = root_ht;
320 tp->data = tp_c;
321 return 0;
322}
323
324static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n)
325{
326 tcf_unbind_filter(tp, &n->res);
327 tcf_exts_destroy(tp, &n->exts);
328 if (n->ht_down)
329 n->ht_down->refcnt--;
330#ifdef CONFIG_CLS_U32_PERF
Patrick McHardy1ae39a42006-03-23 01:16:48 -0800331 kfree(n->pf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332#endif
333 kfree(n);
334 return 0;
335}
336
337static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
338{
339 struct tc_u_knode **kp;
340 struct tc_u_hnode *ht = key->ht_up;
341
342 if (ht) {
343 for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) {
344 if (*kp == key) {
345 tcf_tree_lock(tp);
346 *kp = key->next;
347 tcf_tree_unlock(tp);
348
349 u32_destroy_key(tp, key);
350 return 0;
351 }
352 }
353 }
354 BUG_TRAP(0);
355 return 0;
356}
357
358static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
359{
360 struct tc_u_knode *n;
361 unsigned h;
362
363 for (h=0; h<=ht->divisor; h++) {
364 while ((n = ht->ht[h]) != NULL) {
365 ht->ht[h] = n->next;
366
367 u32_destroy_key(tp, n);
368 }
369 }
370}
371
372static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
373{
374 struct tc_u_common *tp_c = tp->data;
375 struct tc_u_hnode **hn;
376
377 BUG_TRAP(!ht->refcnt);
378
379 u32_clear_hnode(tp, ht);
380
381 for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) {
382 if (*hn == ht) {
383 *hn = ht->next;
384 kfree(ht);
385 return 0;
386 }
387 }
388
389 BUG_TRAP(0);
390 return -ENOENT;
391}
392
393static void u32_destroy(struct tcf_proto *tp)
394{
395 struct tc_u_common *tp_c = tp->data;
396 struct tc_u_hnode *root_ht = xchg(&tp->root, NULL);
397
398 BUG_TRAP(root_ht != NULL);
399
400 if (root_ht && --root_ht->refcnt == 0)
401 u32_destroy_hnode(tp, root_ht);
402
403 if (--tp_c->refcnt == 0) {
404 struct tc_u_hnode *ht;
405 struct tc_u_common **tp_cp;
406
407 for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) {
408 if (*tp_cp == tp_c) {
409 *tp_cp = tp_c->next;
410 break;
411 }
412 }
413
414 for (ht=tp_c->hlist; ht; ht = ht->next)
415 u32_clear_hnode(tp, ht);
416
417 while ((ht = tp_c->hlist) != NULL) {
418 tp_c->hlist = ht->next;
419
420 BUG_TRAP(ht->refcnt == 0);
421
422 kfree(ht);
Stephen Hemminger3ff50b72007-04-20 17:09:22 -0700423 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
425 kfree(tp_c);
426 }
427
428 tp->data = NULL;
429}
430
431static int u32_delete(struct tcf_proto *tp, unsigned long arg)
432{
433 struct tc_u_hnode *ht = (struct tc_u_hnode*)arg;
434
435 if (ht == NULL)
436 return 0;
437
438 if (TC_U32_KEY(ht->handle))
439 return u32_delete_key(tp, (struct tc_u_knode*)ht);
440
441 if (tp->root == ht)
442 return -EINVAL;
443
444 if (--ht->refcnt == 0)
445 u32_destroy_hnode(tp, ht);
446
447 return 0;
448}
449
450static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
451{
452 struct tc_u_knode *n;
453 unsigned i = 0x7FF;
454
455 for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
456 if (i < TC_U32_NODE(n->handle))
457 i = TC_U32_NODE(n->handle);
458 i++;
459
460 return handle|(i>0xFFF ? 0xFFF : i);
461}
462
Patrick McHardy6fa8c012008-01-23 20:36:12 -0800463static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
464 [TCA_U32_CLASSID] = { .type = NLA_U32 },
465 [TCA_U32_HASH] = { .type = NLA_U32 },
466 [TCA_U32_LINK] = { .type = NLA_U32 },
467 [TCA_U32_DIVISOR] = { .type = NLA_U32 },
468 [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) },
469 [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
470 [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) },
471};
472
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
474 struct tc_u_hnode *ht,
Patrick McHardyadd93b62008-01-22 22:11:33 -0800475 struct tc_u_knode *n, struct nlattr **tb,
476 struct nlattr *est)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477{
478 int err;
479 struct tcf_exts e;
480
481 err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map);
482 if (err < 0)
483 return err;
484
485 err = -EINVAL;
Patrick McHardyadd93b62008-01-22 22:11:33 -0800486 if (tb[TCA_U32_LINK]) {
Patrick McHardy1587bac2008-01-23 20:35:03 -0800487 u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 struct tc_u_hnode *ht_down = NULL;
489
490 if (TC_U32_KEY(handle))
491 goto errout;
492
493 if (handle) {
494 ht_down = u32_lookup_ht(ht->tp_c, handle);
495
496 if (ht_down == NULL)
497 goto errout;
498 ht_down->refcnt++;
499 }
500
501 tcf_tree_lock(tp);
502 ht_down = xchg(&n->ht_down, ht_down);
503 tcf_tree_unlock(tp);
504
505 if (ht_down)
506 ht_down->refcnt--;
507 }
Patrick McHardyadd93b62008-01-22 22:11:33 -0800508 if (tb[TCA_U32_CLASSID]) {
Patrick McHardy1587bac2008-01-23 20:35:03 -0800509 n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 tcf_bind_filter(tp, &n->res, base);
511 }
512
513#ifdef CONFIG_NET_CLS_IND
Patrick McHardyadd93b62008-01-22 22:11:33 -0800514 if (tb[TCA_U32_INDEV]) {
515 err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 if (err < 0)
517 goto errout;
518 }
519#endif
520 tcf_exts_change(tp, &n->exts, &e);
521
522 return 0;
523errout:
524 tcf_exts_destroy(tp, &e);
525 return err;
526}
527
528static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
Patrick McHardyadd93b62008-01-22 22:11:33 -0800529 struct nlattr **tca,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 unsigned long *arg)
531{
532 struct tc_u_common *tp_c = tp->data;
533 struct tc_u_hnode *ht;
534 struct tc_u_knode *n;
535 struct tc_u32_sel *s;
Patrick McHardyadd93b62008-01-22 22:11:33 -0800536 struct nlattr *opt = tca[TCA_OPTIONS];
537 struct nlattr *tb[TCA_U32_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 u32 htid;
539 int err;
540
541 if (opt == NULL)
542 return handle ? -EINVAL : 0;
543
Patrick McHardy6fa8c012008-01-23 20:36:12 -0800544 err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800545 if (err < 0)
546 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
548 if ((n = (struct tc_u_knode*)*arg) != NULL) {
549 if (TC_U32_KEY(n->handle) == 0)
550 return -EINVAL;
551
Patrick McHardyadd93b62008-01-22 22:11:33 -0800552 return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 }
554
Patrick McHardyadd93b62008-01-22 22:11:33 -0800555 if (tb[TCA_U32_DIVISOR]) {
Patrick McHardy1587bac2008-01-23 20:35:03 -0800556 unsigned divisor = nla_get_u32(tb[TCA_U32_DIVISOR]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
558 if (--divisor > 0x100)
559 return -EINVAL;
560 if (TC_U32_KEY(handle))
561 return -EINVAL;
562 if (handle == 0) {
563 handle = gen_new_htid(tp->data);
564 if (handle == 0)
565 return -ENOMEM;
566 }
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700567 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 if (ht == NULL)
569 return -ENOBUFS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 ht->tp_c = tp_c;
571 ht->refcnt = 0;
572 ht->divisor = divisor;
573 ht->handle = handle;
574 ht->prio = tp->prio;
575 ht->next = tp_c->hlist;
576 tp_c->hlist = ht;
577 *arg = (unsigned long)ht;
578 return 0;
579 }
580
Patrick McHardyadd93b62008-01-22 22:11:33 -0800581 if (tb[TCA_U32_HASH]) {
Patrick McHardy1587bac2008-01-23 20:35:03 -0800582 htid = nla_get_u32(tb[TCA_U32_HASH]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
584 ht = tp->root;
585 htid = ht->handle;
586 } else {
587 ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
588 if (ht == NULL)
589 return -EINVAL;
590 }
591 } else {
592 ht = tp->root;
593 htid = ht->handle;
594 }
595
596 if (ht->divisor < TC_U32_HASH(htid))
597 return -EINVAL;
598
599 if (handle) {
600 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
601 return -EINVAL;
602 handle = htid | TC_U32_NODE(handle);
603 } else
604 handle = gen_new_kid(ht, htid);
605
Patrick McHardy6fa8c012008-01-23 20:36:12 -0800606 if (tb[TCA_U32_SEL] == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 return -EINVAL;
608
Patrick McHardyadd93b62008-01-22 22:11:33 -0800609 s = nla_data(tb[TCA_U32_SEL]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700611 n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 if (n == NULL)
613 return -ENOBUFS;
614
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615#ifdef CONFIG_CLS_U32_PERF
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700616 n->pf = kzalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 if (n->pf == NULL) {
618 kfree(n);
619 return -ENOBUFS;
620 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621#endif
622
623 memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
624 n->ht_up = ht;
625 n->handle = handle;
Radu Rendecb2268012007-11-10 21:54:50 -0800626 n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
628#ifdef CONFIG_CLS_U32_MARK
Patrick McHardyadd93b62008-01-22 22:11:33 -0800629 if (tb[TCA_U32_MARK]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 struct tc_u32_mark *mark;
631
Patrick McHardyadd93b62008-01-22 22:11:33 -0800632 mark = nla_data(tb[TCA_U32_MARK]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
634 n->mark.success = 0;
635 }
636#endif
637
Patrick McHardyadd93b62008-01-22 22:11:33 -0800638 err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 if (err == 0) {
640 struct tc_u_knode **ins;
641 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
642 if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
643 break;
644
645 n->next = *ins;
646 wmb();
647 *ins = n;
648
649 *arg = (unsigned long)n;
650 return 0;
651 }
652#ifdef CONFIG_CLS_U32_PERF
Patrick McHardy1ae39a42006-03-23 01:16:48 -0800653 kfree(n->pf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654#endif
655 kfree(n);
656 return err;
657}
658
659static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
660{
661 struct tc_u_common *tp_c = tp->data;
662 struct tc_u_hnode *ht;
663 struct tc_u_knode *n;
664 unsigned h;
665
666 if (arg->stop)
667 return;
668
669 for (ht = tp_c->hlist; ht; ht = ht->next) {
670 if (ht->prio != tp->prio)
671 continue;
672 if (arg->count >= arg->skip) {
673 if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
674 arg->stop = 1;
675 return;
676 }
677 }
678 arg->count++;
679 for (h = 0; h <= ht->divisor; h++) {
680 for (n = ht->ht[h]; n; n = n->next) {
681 if (arg->count < arg->skip) {
682 arg->count++;
683 continue;
684 }
685 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
686 arg->stop = 1;
687 return;
688 }
689 arg->count++;
690 }
691 }
692 }
693}
694
695static int u32_dump(struct tcf_proto *tp, unsigned long fh,
696 struct sk_buff *skb, struct tcmsg *t)
697{
698 struct tc_u_knode *n = (struct tc_u_knode*)fh;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800699 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701 if (n == NULL)
702 return skb->len;
703
704 t->tcm_handle = n->handle;
705
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800706 nest = nla_nest_start(skb, TCA_OPTIONS);
707 if (nest == NULL)
708 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709
710 if (TC_U32_KEY(n->handle) == 0) {
711 struct tc_u_hnode *ht = (struct tc_u_hnode*)fh;
712 u32 divisor = ht->divisor+1;
Patrick McHardy24beeab2008-01-23 20:34:48 -0800713 NLA_PUT_U32(skb, TCA_U32_DIVISOR, divisor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 } else {
Patrick McHardyadd93b62008-01-22 22:11:33 -0800715 NLA_PUT(skb, TCA_U32_SEL,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
717 &n->sel);
718 if (n->ht_up) {
719 u32 htid = n->handle & 0xFFFFF000;
Patrick McHardy24beeab2008-01-23 20:34:48 -0800720 NLA_PUT_U32(skb, TCA_U32_HASH, htid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 }
722 if (n->res.classid)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800723 NLA_PUT_U32(skb, TCA_U32_CLASSID, n->res.classid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 if (n->ht_down)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800725 NLA_PUT_U32(skb, TCA_U32_LINK, n->ht_down->handle);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
727#ifdef CONFIG_CLS_U32_MARK
728 if (n->mark.val || n->mark.mask)
Patrick McHardyadd93b62008-01-22 22:11:33 -0800729 NLA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730#endif
731
732 if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0)
Patrick McHardyadd93b62008-01-22 22:11:33 -0800733 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734
735#ifdef CONFIG_NET_CLS_IND
736 if(strlen(n->indev))
Patrick McHardy57e1c482008-01-23 20:34:28 -0800737 NLA_PUT_STRING(skb, TCA_U32_INDEV, n->indev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738#endif
739#ifdef CONFIG_CLS_U32_PERF
Patrick McHardyadd93b62008-01-22 22:11:33 -0800740 NLA_PUT(skb, TCA_U32_PCNT,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
742 n->pf);
743#endif
744 }
745
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800746 nla_nest_end(skb, nest);
747
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 if (TC_U32_KEY(n->handle))
749 if (tcf_exts_dump_stats(skb, &n->exts, &u32_ext_map) < 0)
Patrick McHardyadd93b62008-01-22 22:11:33 -0800750 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 return skb->len;
752
Patrick McHardyadd93b62008-01-22 22:11:33 -0800753nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800754 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 return -1;
756}
757
Patrick McHardy2eb9d752008-01-22 22:10:42 -0800758static struct tcf_proto_ops cls_u32_ops __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 .kind = "u32",
760 .classify = u32_classify,
761 .init = u32_init,
762 .destroy = u32_destroy,
763 .get = u32_get,
764 .put = u32_put,
765 .change = u32_change,
766 .delete = u32_delete,
767 .walk = u32_walk,
768 .dump = u32_dump,
769 .owner = THIS_MODULE,
770};
771
772static int __init init_u32(void)
773{
774 printk("u32 classifier\n");
775#ifdef CONFIG_CLS_U32_PERF
Ralf Hildebrandtc0956bd2006-08-15 02:12:43 -0700776 printk(" Performance counters on\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778#ifdef CONFIG_NET_CLS_IND
779 printk(" input device check on \n");
780#endif
781#ifdef CONFIG_NET_CLS_ACT
782 printk(" Actions configured \n");
783#endif
784 return register_tcf_proto_ops(&cls_u32_ops);
785}
786
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900787static void __exit exit_u32(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788{
789 unregister_tcf_proto_ops(&cls_u32_ops);
790}
791
792module_init(init_u32)
793module_exit(exit_u32)
794MODULE_LICENSE("GPL");