projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
net: sched: make cls_u32 per cpu
[deliverable/linux.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 <linux/module.h>
34 #include <linux/slab.h>
35 #include <linux/types.h>
36 #include <linux/kernel.h>
37 #include <linux/string.h>
38 #include <linux/errno.h>
39 #include <linux/rtnetlink.h>
40 #include <linux/skbuff.h>
41 #include <linux/bitmap.h>
42 #include <net/netlink.h>
43 #include <net/act_api.h>
44 #include <net/pkt_cls.h>
45
46 struct tc_u_knode {
47 struct tc_u_knode *next;
48 u32 handle;
49 struct tc_u_hnode *ht_up;
50 struct tcf_exts exts;
51 #ifdef CONFIG_NET_CLS_IND
52 int ifindex;
53 #endif
54 u8 fshift;
55 struct tcf_result res;
56 struct tc_u_hnode *ht_down;
57 #ifdef CONFIG_CLS_U32_PERF
58 struct tc_u32_pcnt __percpu *pf;
59 #endif
60 #ifdef CONFIG_CLS_U32_MARK
61 u32 val;
62 u32 mask;
63 u32 __percpu *pcpu_success;
64 #endif
65 struct tc_u32_sel sel;
66 };
67
68 struct tc_u_hnode {
69 struct tc_u_hnode *next;
70 u32 handle;
71 u32 prio;
72 struct tc_u_common *tp_c;
73 int refcnt;
74 unsigned int divisor;
75 struct tc_u_knode *ht[1];
76 };
77
78 struct tc_u_common {
79 struct tc_u_hnode *hlist;
80 struct Qdisc *q;
81 int refcnt;
82 u32 hgenerator;
83 };
84
85 static inline unsigned int u32_hash_fold(__be32 key,
86 const struct tc_u32_sel *sel,
87 u8 fshift)
88 {
89 unsigned int h = ntohl(key & sel->hmask) >> fshift;
90
91 return h;
92 }
93
94 static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res)
95 {
96 struct {
97 struct tc_u_knode *knode;
98 unsigned int off;
99 } stack[TC_U32_MAXDEPTH];
100
101 struct tc_u_hnode *ht = tp->root;
102 unsigned int off = skb_network_offset(skb);
103 struct tc_u_knode *n;
104 int sdepth = 0;
105 int off2 = 0;
106 int sel = 0;
107 #ifdef CONFIG_CLS_U32_PERF
108 int j;
109 #endif
110 int i, r;
111
112 next_ht:
113 n = ht->ht[sel];
114
115 next_knode:
116 if (n) {
117 struct tc_u32_key *key = n->sel.keys;
118
119 #ifdef CONFIG_CLS_U32_PERF
120 __this_cpu_inc(n->pf->rcnt);
121 j = 0;
122 #endif
123
124 #ifdef CONFIG_CLS_U32_MARK
125 if ((skb->mark & n->mask) != n->val) {
126 n = n->next;
127 goto next_knode;
128 } else {
129 __this_cpu_inc(*n->pcpu_success);
130 }
131 #endif
132
133 for (i = n->sel.nkeys; i > 0; i--, key++) {
134 int toff = off + key->off + (off2 & key->offmask);
135 __be32 *data, hdata;
136
137 if (skb_headroom(skb) + toff > INT_MAX)
138 goto out;
139
140 data = skb_header_pointer(skb, toff, 4, &hdata);
141 if (!data)
142 goto out;
143 if ((*data ^ key->val) & key->mask) {
144 n = n->next;
145 goto next_knode;
146 }
147 #ifdef CONFIG_CLS_U32_PERF
148 __this_cpu_inc(n->pf->kcnts[j]);
149 j++;
150 #endif
151 }
152 if (n->ht_down == NULL) {
153 check_terminal:
154 if (n->sel.flags & TC_U32_TERMINAL) {
155
156 *res = n->res;
157 #ifdef CONFIG_NET_CLS_IND
158 if (!tcf_match_indev(skb, n->ifindex)) {
159 n = n->next;
160 goto next_knode;
161 }
162 #endif
163 #ifdef CONFIG_CLS_U32_PERF
164 __this_cpu_inc(n->pf->rhit);
165 #endif
166 r = tcf_exts_exec(skb, &n->exts, res);
167 if (r < 0) {
168 n = n->next;
169 goto next_knode;
170 }
171
172 return r;
173 }
174 n = n->next;
175 goto next_knode;
176 }
177
178 /* PUSH */
179 if (sdepth >= TC_U32_MAXDEPTH)
180 goto deadloop;
181 stack[sdepth].knode = n;
182 stack[sdepth].off = off;
183 sdepth++;
184
185 ht = n->ht_down;
186 sel = 0;
187 if (ht->divisor) {
188 __be32 *data, hdata;
189
190 data = skb_header_pointer(skb, off + n->sel.hoff, 4,
191 &hdata);
192 if (!data)
193 goto out;
194 sel = ht->divisor & u32_hash_fold(*data, &n->sel,
195 n->fshift);
196 }
197 if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT)))
198 goto next_ht;
199
200 if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) {
201 off2 = n->sel.off + 3;
202 if (n->sel.flags & TC_U32_VAROFFSET) {
203 __be16 *data, hdata;
204
205 data = skb_header_pointer(skb,
206 off + n->sel.offoff,
207 2, &hdata);
208 if (!data)
209 goto out;
210 off2 += ntohs(n->sel.offmask & *data) >>
211 n->sel.offshift;
212 }
213 off2 &= ~3;
214 }
215 if (n->sel.flags & TC_U32_EAT) {
216 off += off2;
217 off2 = 0;
218 }
219
220 if (off < skb->len)
221 goto next_ht;
222 }
223
224 /* POP */
225 if (sdepth--) {
226 n = stack[sdepth].knode;
227 ht = n->ht_up;
228 off = stack[sdepth].off;
229 goto check_terminal;
230 }
231 out:
232 return -1;
233
234 deadloop:
235 net_warn_ratelimited("cls_u32: dead loop\n");
236 return -1;
237 }
238
239 static struct tc_u_hnode *
240 u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
241 {
242 struct tc_u_hnode *ht;
243
244 for (ht = tp_c->hlist; ht; ht = ht->next)
245 if (ht->handle == handle)
246 break;
247
248 return ht;
249 }
250
251 static struct tc_u_knode *
252 u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
253 {
254 unsigned int sel;
255 struct tc_u_knode *n = NULL;
256
257 sel = TC_U32_HASH(handle);
258 if (sel > ht->divisor)
259 goto out;
260
261 for (n = ht->ht[sel]; n; n = n->next)
262 if (n->handle == handle)
263 break;
264 out:
265 return n;
266 }
267
268
269 static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
270 {
271 struct tc_u_hnode *ht;
272 struct tc_u_common *tp_c = tp->data;
273
274 if (TC_U32_HTID(handle) == TC_U32_ROOT)
275 ht = tp->root;
276 else
277 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
278
279 if (!ht)
280 return 0;
281
282 if (TC_U32_KEY(handle) == 0)
283 return (unsigned long)ht;
284
285 return (unsigned long)u32_lookup_key(ht, handle);
286 }
287
288 static void u32_put(struct tcf_proto *tp, unsigned long f)
289 {
290 }
291
292 static u32 gen_new_htid(struct tc_u_common *tp_c)
293 {
294 int i = 0x800;
295
296 do {
297 if (++tp_c->hgenerator == 0x7FF)
298 tp_c->hgenerator = 1;
299 } while (--i > 0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
300
301 return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
302 }
303
304 static int u32_init(struct tcf_proto *tp)
305 {
306 struct tc_u_hnode *root_ht;
307 struct tc_u_common *tp_c;
308
309 tp_c = tp->q->u32_node;
310
311 root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
312 if (root_ht == NULL)
313 return -ENOBUFS;
314
315 root_ht->divisor = 0;
316 root_ht->refcnt++;
317 root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
318 root_ht->prio = tp->prio;
319
320 if (tp_c == NULL) {
321 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
322 if (tp_c == NULL) {
323 kfree(root_ht);
324 return -ENOBUFS;
325 }
326 tp_c->q = tp->q;
327 tp->q->u32_node = 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 free_percpu(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 WARN_ON(1);
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 int 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 WARN_ON(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 WARN_ON(1);
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 = tp->root;
413
414 WARN_ON(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
422 tp->q->u32_node = NULL;
423
424 for (ht = tp_c->hlist; ht; ht = ht->next) {
425 ht->refcnt--;
426 u32_clear_hnode(tp, ht);
427 }
428
429 while ((ht = tp_c->hlist) != NULL) {
430 tp_c->hlist = ht->next;
431
432 WARN_ON(ht->refcnt != 0);
433
434 kfree(ht);
435 }
436
437 kfree(tp_c);
438 }
439
440 tp->data = NULL;
441 }
442
443 static int u32_delete(struct tcf_proto *tp, unsigned long arg)
444 {
445 struct tc_u_hnode *ht = (struct tc_u_hnode *)arg;
446
447 if (ht == NULL)
448 return 0;
449
450 if (TC_U32_KEY(ht->handle))
451 return u32_delete_key(tp, (struct tc_u_knode *)ht);
452
453 if (tp->root == ht)
454 return -EINVAL;
455
456 if (ht->refcnt == 1) {
457 ht->refcnt--;
458 u32_destroy_hnode(tp, ht);
459 } else {
460 return -EBUSY;
461 }
462
463 return 0;
464 }
465
466 #define NR_U32_NODE (1<<12)
467 static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
468 {
469 struct tc_u_knode *n;
470 unsigned long i;
471 unsigned long *bitmap = kzalloc(BITS_TO_LONGS(NR_U32_NODE) * sizeof(unsigned long),
472 GFP_KERNEL);
473 if (!bitmap)
474 return handle | 0xFFF;
475
476 for (n = ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
477 set_bit(TC_U32_NODE(n->handle), bitmap);
478
479 i = find_next_zero_bit(bitmap, NR_U32_NODE, 0x800);
480 if (i >= NR_U32_NODE)
481 i = find_next_zero_bit(bitmap, NR_U32_NODE, 1);
482
483 kfree(bitmap);
484 return handle | (i >= NR_U32_NODE ? 0xFFF : i);
485 }
486
487 static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
488 [TCA_U32_CLASSID] = { .type = NLA_U32 },
489 [TCA_U32_HASH] = { .type = NLA_U32 },
490 [TCA_U32_LINK] = { .type = NLA_U32 },
491 [TCA_U32_DIVISOR] = { .type = NLA_U32 },
492 [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) },
493 [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
494 [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) },
495 };
496
497 static int u32_set_parms(struct net *net, struct tcf_proto *tp,
498 unsigned long base, struct tc_u_hnode *ht,
499 struct tc_u_knode *n, struct nlattr **tb,
500 struct nlattr *est, bool ovr)
501 {
502 int err;
503 struct tcf_exts e;
504
505 tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE);
506 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
507 if (err < 0)
508 return err;
509
510 err = -EINVAL;
511 if (tb[TCA_U32_LINK]) {
512 u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
513 struct tc_u_hnode *ht_down = NULL, *ht_old;
514
515 if (TC_U32_KEY(handle))
516 goto errout;
517
518 if (handle) {
519 ht_down = u32_lookup_ht(ht->tp_c, handle);
520
521 if (ht_down == NULL)
522 goto errout;
523 ht_down->refcnt++;
524 }
525
526 tcf_tree_lock(tp);
527 ht_old = n->ht_down;
528 n->ht_down = ht_down;
529 tcf_tree_unlock(tp);
530
531 if (ht_old)
532 ht_old->refcnt--;
533 }
534 if (tb[TCA_U32_CLASSID]) {
535 n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]);
536 tcf_bind_filter(tp, &n->res, base);
537 }
538
539 #ifdef CONFIG_NET_CLS_IND
540 if (tb[TCA_U32_INDEV]) {
541 int ret;
542 ret = tcf_change_indev(net, tb[TCA_U32_INDEV]);
543 if (ret < 0)
544 goto errout;
545 n->ifindex = ret;
546 }
547 #endif
548 tcf_exts_change(tp, &n->exts, &e);
549
550 return 0;
551 errout:
552 tcf_exts_destroy(tp, &e);
553 return err;
554 }
555
556 static int u32_change(struct net *net, struct sk_buff *in_skb,
557 struct tcf_proto *tp, unsigned long base, u32 handle,
558 struct nlattr **tca,
559 unsigned long *arg, bool ovr)
560 {
561 struct tc_u_common *tp_c = tp->data;
562 struct tc_u_hnode *ht;
563 struct tc_u_knode *n;
564 struct tc_u32_sel *s;
565 struct nlattr *opt = tca[TCA_OPTIONS];
566 struct nlattr *tb[TCA_U32_MAX + 1];
567 u32 htid;
568 int err;
569 #ifdef CONFIG_CLS_U32_PERF
570 size_t size;
571 #endif
572
573 if (opt == NULL)
574 return handle ? -EINVAL : 0;
575
576 err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy);
577 if (err < 0)
578 return err;
579
580 n = (struct tc_u_knode *)*arg;
581 if (n) {
582 if (TC_U32_KEY(n->handle) == 0)
583 return -EINVAL;
584
585 return u32_set_parms(net, tp, base, n->ht_up, n, tb,
586 tca[TCA_RATE], ovr);
587 }
588
589 if (tb[TCA_U32_DIVISOR]) {
590 unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]);
591
592 if (--divisor > 0x100)
593 return -EINVAL;
594 if (TC_U32_KEY(handle))
595 return -EINVAL;
596 if (handle == 0) {
597 handle = gen_new_htid(tp->data);
598 if (handle == 0)
599 return -ENOMEM;
600 }
601 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL);
602 if (ht == NULL)
603 return -ENOBUFS;
604 ht->tp_c = tp_c;
605 ht->refcnt = 1;
606 ht->divisor = divisor;
607 ht->handle = handle;
608 ht->prio = tp->prio;
609 ht->next = tp_c->hlist;
610 tp_c->hlist = ht;
611 *arg = (unsigned long)ht;
612 return 0;
613 }
614
615 if (tb[TCA_U32_HASH]) {
616 htid = nla_get_u32(tb[TCA_U32_HASH]);
617 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
618 ht = tp->root;
619 htid = ht->handle;
620 } else {
621 ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
622 if (ht == NULL)
623 return -EINVAL;
624 }
625 } else {
626 ht = tp->root;
627 htid = ht->handle;
628 }
629
630 if (ht->divisor < TC_U32_HASH(htid))
631 return -EINVAL;
632
633 if (handle) {
634 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
635 return -EINVAL;
636 handle = htid | TC_U32_NODE(handle);
637 } else
638 handle = gen_new_kid(ht, htid);
639
640 if (tb[TCA_U32_SEL] == NULL)
641 return -EINVAL;
642
643 s = nla_data(tb[TCA_U32_SEL]);
644
645 n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
646 if (n == NULL)
647 return -ENOBUFS;
648
649 #ifdef CONFIG_CLS_U32_PERF
650 size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64);
651 n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt));
652 if (!n->pf) {
653 kfree(n);
654 return -ENOBUFS;
655 }
656 #endif
657
658 memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
659 n->ht_up = ht;
660 n->handle = handle;
661 n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
662 tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE);
663
664 #ifdef CONFIG_CLS_U32_MARK
665 n->pcpu_success = alloc_percpu(u32);
666
667 if (tb[TCA_U32_MARK]) {
668 struct tc_u32_mark *mark;
669
670 mark = nla_data(tb[TCA_U32_MARK]);
671 n->val = mark->val;
672 n->mask = mark->mask;
673 }
674 #endif
675
676 err = u32_set_parms(net, tp, base, ht, n, tb, tca[TCA_RATE], ovr);
677 if (err == 0) {
678 struct tc_u_knode **ins;
679 for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
680 if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
681 break;
682
683 n->next = *ins;
684 tcf_tree_lock(tp);
685 *ins = n;
686 tcf_tree_unlock(tp);
687
688 *arg = (unsigned long)n;
689 return 0;
690 }
691 #ifdef CONFIG_CLS_U32_PERF
692 kfree(n->pf);
693 #endif
694 kfree(n);
695 return err;
696 }
697
698 static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
699 {
700 struct tc_u_common *tp_c = tp->data;
701 struct tc_u_hnode *ht;
702 struct tc_u_knode *n;
703 unsigned int h;
704
705 if (arg->stop)
706 return;
707
708 for (ht = tp_c->hlist; ht; ht = ht->next) {
709 if (ht->prio != tp->prio)
710 continue;
711 if (arg->count >= arg->skip) {
712 if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
713 arg->stop = 1;
714 return;
715 }
716 }
717 arg->count++;
718 for (h = 0; h <= ht->divisor; h++) {
719 for (n = ht->ht[h]; n; n = n->next) {
720 if (arg->count < arg->skip) {
721 arg->count++;
722 continue;
723 }
724 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
725 arg->stop = 1;
726 return;
727 }
728 arg->count++;
729 }
730 }
731 }
732 }
733
734 static int u32_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
735 struct sk_buff *skb, struct tcmsg *t)
736 {
737 struct tc_u_knode *n = (struct tc_u_knode *)fh;
738 struct nlattr *nest;
739
740 if (n == NULL)
741 return skb->len;
742
743 t->tcm_handle = n->handle;
744
745 nest = nla_nest_start(skb, TCA_OPTIONS);
746 if (nest == NULL)
747 goto nla_put_failure;
748
749 if (TC_U32_KEY(n->handle) == 0) {
750 struct tc_u_hnode *ht = (struct tc_u_hnode *)fh;
751 u32 divisor = ht->divisor + 1;
752
753 if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor))
754 goto nla_put_failure;
755 } else {
756 #ifdef CONFIG_CLS_U32_PERF
757 struct tc_u32_pcnt *gpf;
758 #endif
759 int cpu;
760
761 if (nla_put(skb, TCA_U32_SEL,
762 sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
763 &n->sel))
764 goto nla_put_failure;
765 if (n->ht_up) {
766 u32 htid = n->handle & 0xFFFFF000;
767 if (nla_put_u32(skb, TCA_U32_HASH, htid))
768 goto nla_put_failure;
769 }
770 if (n->res.classid &&
771 nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid))
772 goto nla_put_failure;
773 if (n->ht_down &&
774 nla_put_u32(skb, TCA_U32_LINK, n->ht_down->handle))
775 goto nla_put_failure;
776
777 #ifdef CONFIG_CLS_U32_MARK
778 if ((n->val || n->mask)) {
779 struct tc_u32_mark mark = {.val = n->val,
780 .mask = n->mask,
781 .success = 0};
782
783 for_each_possible_cpu(cpu) {
784 __u32 cnt = *per_cpu_ptr(n->pcpu_success, cpu);
785
786 mark.success += cnt;
787 }
788
789 if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark))
790 goto nla_put_failure;
791 }
792 #endif
793
794 if (tcf_exts_dump(skb, &n->exts) < 0)
795 goto nla_put_failure;
796
797 #ifdef CONFIG_NET_CLS_IND
798 if (n->ifindex) {
799 struct net_device *dev;
800 dev = __dev_get_by_index(net, n->ifindex);
801 if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name))
802 goto nla_put_failure;
803 }
804 #endif
805 #ifdef CONFIG_CLS_U32_PERF
806 gpf = kzalloc(sizeof(struct tc_u32_pcnt) +
807 n->sel.nkeys * sizeof(u64),
808 GFP_KERNEL);
809 if (!gpf)
810 goto nla_put_failure;
811
812 for_each_possible_cpu(cpu) {
813 int i;
814 struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu);
815
816 gpf->rcnt += pf->rcnt;
817 gpf->rhit += pf->rhit;
818 for (i = 0; i < n->sel.nkeys; i++)
819 gpf->kcnts[i] += pf->kcnts[i];
820 }
821
822 if (nla_put(skb, TCA_U32_PCNT,
823 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
824 gpf)) {
825 kfree(gpf);
826 goto nla_put_failure;
827 }
828 kfree(gpf);
829 #endif
830 }
831
832 nla_nest_end(skb, nest);
833
834 if (TC_U32_KEY(n->handle))
835 if (tcf_exts_dump_stats(skb, &n->exts) < 0)
836 goto nla_put_failure;
837 return skb->len;
838
839 nla_put_failure:
840 nla_nest_cancel(skb, nest);
841 return -1;
842 }
843
844 static struct tcf_proto_ops cls_u32_ops __read_mostly = {
845 .kind = "u32",
846 .classify = u32_classify,
847 .init = u32_init,
848 .destroy = u32_destroy,
849 .get = u32_get,
850 .put = u32_put,
851 .change = u32_change,
852 .delete = u32_delete,
853 .walk = u32_walk,
854 .dump = u32_dump,
855 .owner = THIS_MODULE,
856 };
857
858 static int __init init_u32(void)
859 {
860 pr_info("u32 classifier\n");
861 #ifdef CONFIG_CLS_U32_PERF
862 pr_info(" Performance counters on\n");
863 #endif
864 #ifdef CONFIG_NET_CLS_IND
865 pr_info(" input device check on\n");
866 #endif
867 #ifdef CONFIG_NET_CLS_ACT
868 pr_info(" Actions configured\n");
869 #endif
870 return register_tcf_proto_ops(&cls_u32_ops);
871 }
872
873 static void __exit exit_u32(void)
874 {
875 unregister_tcf_proto_ops(&cls_u32_ops);
876 }
877
878 module_init(init_u32)
879 module_exit(exit_u32)
880 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.050655 seconds and 5 git commands to generate.