2 * net/sched/cls_u32.c Ugly (or Universal) 32bit key Packet Classifier.
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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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.
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.
20 * It seems that it represents the best middle point between
21 * speed and manageability both by human and by machine.
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.
27 * JHS: We should remove the CONFIG_NET_CLS_IND from here
28 * eventually when the meta match extension is made available
30 * nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro>
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/percpu.h>
40 #include <linux/rtnetlink.h>
41 #include <linux/skbuff.h>
42 #include <linux/bitmap.h>
43 #include <net/netlink.h>
44 #include <net/act_api.h>
45 #include <net/pkt_cls.h>
48 struct tc_u_knode __rcu *next;
50 struct tc_u_hnode __rcu *ht_up;
52 #ifdef CONFIG_NET_CLS_IND
56 struct tcf_result res;
57 struct tc_u_hnode __rcu *ht_down;
58 #ifdef CONFIG_CLS_U32_PERF
59 struct tc_u32_pcnt __percpu *pf;
61 #ifdef CONFIG_CLS_U32_MARK
64 u32 __percpu *pcpu_success;
68 /* The 'sel' field MUST be the last field in structure to allow for
69 * tc_u32_keys allocated at end of structure.
71 struct tc_u32_sel sel;
75 struct tc_u_hnode __rcu *next;
78 struct tc_u_common *tp_c;
82 /* The 'ht' field MUST be the last field in structure to allow for
83 * more entries allocated at end of structure.
85 struct tc_u_knode __rcu *ht[1];
89 struct tc_u_hnode __rcu *hlist;
96 static inline unsigned int u32_hash_fold(__be32 key,
97 const struct tc_u32_sel *sel,
100 unsigned int h = ntohl(key & sel->hmask) >> fshift;
105 static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res)
108 struct tc_u_knode *knode;
110 } stack[TC_U32_MAXDEPTH];
112 struct tc_u_hnode *ht = rcu_dereference_bh(tp->root);
113 unsigned int off = skb_network_offset(skb);
114 struct tc_u_knode *n;
118 #ifdef CONFIG_CLS_U32_PERF
124 n = rcu_dereference_bh(ht->ht[sel]);
128 struct tc_u32_key *key = n->sel.keys;
130 #ifdef CONFIG_CLS_U32_PERF
131 __this_cpu_inc(n->pf->rcnt);
135 #ifdef CONFIG_CLS_U32_MARK
136 if ((skb->mark & n->mask) != n->val) {
137 n = rcu_dereference_bh(n->next);
140 __this_cpu_inc(*n->pcpu_success);
144 for (i = n->sel.nkeys; i > 0; i--, key++) {
145 int toff = off + key->off + (off2 & key->offmask);
148 if (skb_headroom(skb) + toff > INT_MAX)
151 data = skb_header_pointer(skb, toff, 4, &hdata);
154 if ((*data ^ key->val) & key->mask) {
155 n = rcu_dereference_bh(n->next);
158 #ifdef CONFIG_CLS_U32_PERF
159 __this_cpu_inc(n->pf->kcnts[j]);
164 ht = rcu_dereference_bh(n->ht_down);
167 if (n->sel.flags & TC_U32_TERMINAL) {
170 #ifdef CONFIG_NET_CLS_IND
171 if (!tcf_match_indev(skb, n->ifindex)) {
172 n = rcu_dereference_bh(n->next);
176 #ifdef CONFIG_CLS_U32_PERF
177 __this_cpu_inc(n->pf->rhit);
179 r = tcf_exts_exec(skb, &n->exts, res);
181 n = rcu_dereference_bh(n->next);
187 n = rcu_dereference_bh(n->next);
192 if (sdepth >= TC_U32_MAXDEPTH)
194 stack[sdepth].knode = n;
195 stack[sdepth].off = off;
198 ht = rcu_dereference_bh(n->ht_down);
203 data = skb_header_pointer(skb, off + n->sel.hoff, 4,
207 sel = ht->divisor & u32_hash_fold(*data, &n->sel,
210 if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT)))
213 if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) {
214 off2 = n->sel.off + 3;
215 if (n->sel.flags & TC_U32_VAROFFSET) {
218 data = skb_header_pointer(skb,
223 off2 += ntohs(n->sel.offmask & *data) >>
228 if (n->sel.flags & TC_U32_EAT) {
239 n = stack[sdepth].knode;
240 ht = rcu_dereference_bh(n->ht_up);
241 off = stack[sdepth].off;
248 net_warn_ratelimited("cls_u32: dead loop\n");
252 static struct tc_u_hnode *
253 u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
255 struct tc_u_hnode *ht;
257 for (ht = rtnl_dereference(tp_c->hlist);
259 ht = rtnl_dereference(ht->next))
260 if (ht->handle == handle)
266 static struct tc_u_knode *
267 u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
270 struct tc_u_knode *n = NULL;
272 sel = TC_U32_HASH(handle);
273 if (sel > ht->divisor)
276 for (n = rtnl_dereference(ht->ht[sel]);
278 n = rtnl_dereference(n->next))
279 if (n->handle == handle)
286 static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
288 struct tc_u_hnode *ht;
289 struct tc_u_common *tp_c = tp->data;
291 if (TC_U32_HTID(handle) == TC_U32_ROOT)
292 ht = rtnl_dereference(tp->root);
294 ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
299 if (TC_U32_KEY(handle) == 0)
300 return (unsigned long)ht;
302 return (unsigned long)u32_lookup_key(ht, handle);
305 static u32 gen_new_htid(struct tc_u_common *tp_c)
309 /* hgenerator only used inside rtnl lock it is safe to increment
310 * without read _copy_ update semantics
313 if (++tp_c->hgenerator == 0x7FF)
314 tp_c->hgenerator = 1;
315 } while (--i > 0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
317 return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
320 static int u32_init(struct tcf_proto *tp)
322 struct tc_u_hnode *root_ht;
323 struct tc_u_common *tp_c;
325 tp_c = tp->q->u32_node;
327 root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL);
331 root_ht->divisor = 0;
333 root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
334 root_ht->prio = tp->prio;
337 tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL);
343 tp->q->u32_node = tp_c;
347 RCU_INIT_POINTER(root_ht->next, tp_c->hlist);
348 rcu_assign_pointer(tp_c->hlist, root_ht);
349 root_ht->tp_c = tp_c;
351 rcu_assign_pointer(tp->root, root_ht);
356 static int u32_destroy_key(struct tcf_proto *tp,
357 struct tc_u_knode *n,
360 tcf_exts_destroy(&n->exts);
362 n->ht_down->refcnt--;
363 #ifdef CONFIG_CLS_U32_PERF
367 #ifdef CONFIG_CLS_U32_MARK
369 free_percpu(n->pcpu_success);
375 /* u32_delete_key_rcu should be called when free'ing a copied
376 * version of a tc_u_knode obtained from u32_init_knode(). When
377 * copies are obtained from u32_init_knode() the statistics are
378 * shared between the old and new copies to allow readers to
379 * continue to update the statistics during the copy. To support
380 * this the u32_delete_key_rcu variant does not free the percpu
383 static void u32_delete_key_rcu(struct rcu_head *rcu)
385 struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);
387 u32_destroy_key(key->tp, key, false);
390 /* u32_delete_key_freepf_rcu is the rcu callback variant
391 * that free's the entire structure including the statistics
392 * percpu variables. Only use this if the key is not a copy
393 * returned by u32_init_knode(). See u32_delete_key_rcu()
394 * for the variant that should be used with keys return from
397 static void u32_delete_key_freepf_rcu(struct rcu_head *rcu)
399 struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);
401 u32_destroy_key(key->tp, key, true);
404 static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key)
406 struct tc_u_knode __rcu **kp;
407 struct tc_u_knode *pkp;
408 struct tc_u_hnode *ht = rtnl_dereference(key->ht_up);
411 kp = &ht->ht[TC_U32_HASH(key->handle)];
412 for (pkp = rtnl_dereference(*kp); pkp;
413 kp = &pkp->next, pkp = rtnl_dereference(*kp)) {
415 RCU_INIT_POINTER(*kp, key->next);
417 tcf_unbind_filter(tp, &key->res);
418 call_rcu(&key->rcu, u32_delete_key_freepf_rcu);
427 static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
429 struct tc_u_knode *n;
432 for (h = 0; h <= ht->divisor; h++) {
433 while ((n = rtnl_dereference(ht->ht[h])) != NULL) {
434 RCU_INIT_POINTER(ht->ht[h],
435 rtnl_dereference(n->next));
436 tcf_unbind_filter(tp, &n->res);
437 call_rcu(&n->rcu, u32_delete_key_freepf_rcu);
442 static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
444 struct tc_u_common *tp_c = tp->data;
445 struct tc_u_hnode __rcu **hn;
446 struct tc_u_hnode *phn;
450 u32_clear_hnode(tp, ht);
453 for (phn = rtnl_dereference(*hn);
455 hn = &phn->next, phn = rtnl_dereference(*hn)) {
457 RCU_INIT_POINTER(*hn, ht->next);
466 static void u32_destroy(struct tcf_proto *tp)
468 struct tc_u_common *tp_c = tp->data;
469 struct tc_u_hnode *root_ht = rtnl_dereference(tp->root);
471 WARN_ON(root_ht == NULL);
473 if (root_ht && --root_ht->refcnt == 0)
474 u32_destroy_hnode(tp, root_ht);
476 if (--tp_c->refcnt == 0) {
477 struct tc_u_hnode *ht;
479 tp->q->u32_node = NULL;
481 for (ht = rtnl_dereference(tp_c->hlist);
483 ht = rtnl_dereference(ht->next)) {
485 u32_clear_hnode(tp, ht);
488 while ((ht = rtnl_dereference(tp_c->hlist)) != NULL) {
489 RCU_INIT_POINTER(tp_c->hlist, ht->next);
499 static int u32_delete(struct tcf_proto *tp, unsigned long arg)
501 struct tc_u_hnode *ht = (struct tc_u_hnode *)arg;
502 struct tc_u_hnode *root_ht = rtnl_dereference(tp->root);
507 if (TC_U32_KEY(ht->handle))
508 return u32_delete_key(tp, (struct tc_u_knode *)ht);
513 if (ht->refcnt == 1) {
515 u32_destroy_hnode(tp, ht);
523 #define NR_U32_NODE (1<<12)
524 static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
526 struct tc_u_knode *n;
528 unsigned long *bitmap = kzalloc(BITS_TO_LONGS(NR_U32_NODE) * sizeof(unsigned long),
531 return handle | 0xFFF;
533 for (n = rtnl_dereference(ht->ht[TC_U32_HASH(handle)]);
535 n = rtnl_dereference(n->next))
536 set_bit(TC_U32_NODE(n->handle), bitmap);
538 i = find_next_zero_bit(bitmap, NR_U32_NODE, 0x800);
539 if (i >= NR_U32_NODE)
540 i = find_next_zero_bit(bitmap, NR_U32_NODE, 1);
543 return handle | (i >= NR_U32_NODE ? 0xFFF : i);
546 static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = {
547 [TCA_U32_CLASSID] = { .type = NLA_U32 },
548 [TCA_U32_HASH] = { .type = NLA_U32 },
549 [TCA_U32_LINK] = { .type = NLA_U32 },
550 [TCA_U32_DIVISOR] = { .type = NLA_U32 },
551 [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) },
552 [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
553 [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) },
556 static int u32_set_parms(struct net *net, struct tcf_proto *tp,
557 unsigned long base, struct tc_u_hnode *ht,
558 struct tc_u_knode *n, struct nlattr **tb,
559 struct nlattr *est, bool ovr)
564 tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE);
565 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
570 if (tb[TCA_U32_LINK]) {
571 u32 handle = nla_get_u32(tb[TCA_U32_LINK]);
572 struct tc_u_hnode *ht_down = NULL, *ht_old;
574 if (TC_U32_KEY(handle))
578 ht_down = u32_lookup_ht(ht->tp_c, handle);
585 ht_old = rtnl_dereference(n->ht_down);
586 rcu_assign_pointer(n->ht_down, ht_down);
591 if (tb[TCA_U32_CLASSID]) {
592 n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]);
593 tcf_bind_filter(tp, &n->res, base);
596 #ifdef CONFIG_NET_CLS_IND
597 if (tb[TCA_U32_INDEV]) {
599 ret = tcf_change_indev(net, tb[TCA_U32_INDEV]);
605 tcf_exts_change(tp, &n->exts, &e);
609 tcf_exts_destroy(&e);
613 static void u32_replace_knode(struct tcf_proto *tp,
614 struct tc_u_common *tp_c,
615 struct tc_u_knode *n)
617 struct tc_u_knode __rcu **ins;
618 struct tc_u_knode *pins;
619 struct tc_u_hnode *ht;
621 if (TC_U32_HTID(n->handle) == TC_U32_ROOT)
622 ht = rtnl_dereference(tp->root);
624 ht = u32_lookup_ht(tp_c, TC_U32_HTID(n->handle));
626 ins = &ht->ht[TC_U32_HASH(n->handle)];
628 /* The node must always exist for it to be replaced if this is not the
629 * case then something went very wrong elsewhere.
631 for (pins = rtnl_dereference(*ins); ;
632 ins = &pins->next, pins = rtnl_dereference(*ins))
633 if (pins->handle == n->handle)
636 RCU_INIT_POINTER(n->next, pins->next);
637 rcu_assign_pointer(*ins, n);
640 static struct tc_u_knode *u32_init_knode(struct tcf_proto *tp,
641 struct tc_u_knode *n)
643 struct tc_u_knode *new;
644 struct tc_u32_sel *s = &n->sel;
646 new = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key),
652 RCU_INIT_POINTER(new->next, n->next);
653 new->handle = n->handle;
654 RCU_INIT_POINTER(new->ht_up, n->ht_up);
656 #ifdef CONFIG_NET_CLS_IND
657 new->ifindex = n->ifindex;
659 new->fshift = n->fshift;
661 RCU_INIT_POINTER(new->ht_down, n->ht_down);
663 /* bump reference count as long as we hold pointer to structure */
665 new->ht_down->refcnt++;
667 #ifdef CONFIG_CLS_U32_PERF
668 /* Statistics may be incremented by readers during update
669 * so we must keep them in tact. When the node is later destroyed
670 * a special destroy call must be made to not free the pf memory.
675 #ifdef CONFIG_CLS_U32_MARK
678 /* Similarly success statistics must be moved as pointers */
679 new->pcpu_success = n->pcpu_success;
682 memcpy(&new->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
684 tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE);
689 static int u32_change(struct net *net, struct sk_buff *in_skb,
690 struct tcf_proto *tp, unsigned long base, u32 handle,
692 unsigned long *arg, bool ovr)
694 struct tc_u_common *tp_c = tp->data;
695 struct tc_u_hnode *ht;
696 struct tc_u_knode *n;
697 struct tc_u32_sel *s;
698 struct nlattr *opt = tca[TCA_OPTIONS];
699 struct nlattr *tb[TCA_U32_MAX + 1];
702 #ifdef CONFIG_CLS_U32_PERF
707 return handle ? -EINVAL : 0;
709 err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy);
713 n = (struct tc_u_knode *)*arg;
715 struct tc_u_knode *new;
717 if (TC_U32_KEY(n->handle) == 0)
720 new = u32_init_knode(tp, n);
724 err = u32_set_parms(net, tp, base,
725 rtnl_dereference(n->ht_up), new, tb,
729 u32_destroy_key(tp, new, false);
733 u32_replace_knode(tp, tp_c, new);
734 tcf_unbind_filter(tp, &n->res);
735 call_rcu(&n->rcu, u32_delete_key_rcu);
739 if (tb[TCA_U32_DIVISOR]) {
740 unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]);
742 if (--divisor > 0x100)
744 if (TC_U32_KEY(handle))
747 handle = gen_new_htid(tp->data);
751 ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL);
756 ht->divisor = divisor;
759 RCU_INIT_POINTER(ht->next, tp_c->hlist);
760 rcu_assign_pointer(tp_c->hlist, ht);
761 *arg = (unsigned long)ht;
765 if (tb[TCA_U32_HASH]) {
766 htid = nla_get_u32(tb[TCA_U32_HASH]);
767 if (TC_U32_HTID(htid) == TC_U32_ROOT) {
768 ht = rtnl_dereference(tp->root);
771 ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
776 ht = rtnl_dereference(tp->root);
780 if (ht->divisor < TC_U32_HASH(htid))
784 if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
786 handle = htid | TC_U32_NODE(handle);
788 handle = gen_new_kid(ht, htid);
790 if (tb[TCA_U32_SEL] == NULL)
793 s = nla_data(tb[TCA_U32_SEL]);
795 n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
799 #ifdef CONFIG_CLS_U32_PERF
800 size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64);
801 n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt));
808 memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
809 RCU_INIT_POINTER(n->ht_up, ht);
811 n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0;
812 tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE);
815 #ifdef CONFIG_CLS_U32_MARK
816 n->pcpu_success = alloc_percpu(u32);
817 if (!n->pcpu_success) {
822 if (tb[TCA_U32_MARK]) {
823 struct tc_u32_mark *mark;
825 mark = nla_data(tb[TCA_U32_MARK]);
827 n->mask = mark->mask;
831 err = u32_set_parms(net, tp, base, ht, n, tb, tca[TCA_RATE], ovr);
833 struct tc_u_knode __rcu **ins;
834 struct tc_u_knode *pins;
836 ins = &ht->ht[TC_U32_HASH(handle)];
837 for (pins = rtnl_dereference(*ins); pins;
838 ins = &pins->next, pins = rtnl_dereference(*ins))
839 if (TC_U32_NODE(handle) < TC_U32_NODE(pins->handle))
842 RCU_INIT_POINTER(n->next, pins);
843 rcu_assign_pointer(*ins, n);
845 *arg = (unsigned long)n;
849 #ifdef CONFIG_CLS_U32_MARK
850 free_percpu(n->pcpu_success);
854 #ifdef CONFIG_CLS_U32_PERF
861 static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
863 struct tc_u_common *tp_c = tp->data;
864 struct tc_u_hnode *ht;
865 struct tc_u_knode *n;
871 for (ht = rtnl_dereference(tp_c->hlist);
873 ht = rtnl_dereference(ht->next)) {
874 if (ht->prio != tp->prio)
876 if (arg->count >= arg->skip) {
877 if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
883 for (h = 0; h <= ht->divisor; h++) {
884 for (n = rtnl_dereference(ht->ht[h]);
886 n = rtnl_dereference(n->next)) {
887 if (arg->count < arg->skip) {
891 if (arg->fn(tp, (unsigned long)n, arg) < 0) {
901 static int u32_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
902 struct sk_buff *skb, struct tcmsg *t)
904 struct tc_u_knode *n = (struct tc_u_knode *)fh;
905 struct tc_u_hnode *ht_up, *ht_down;
911 t->tcm_handle = n->handle;
913 nest = nla_nest_start(skb, TCA_OPTIONS);
915 goto nla_put_failure;
917 if (TC_U32_KEY(n->handle) == 0) {
918 struct tc_u_hnode *ht = (struct tc_u_hnode *)fh;
919 u32 divisor = ht->divisor + 1;
921 if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor))
922 goto nla_put_failure;
924 #ifdef CONFIG_CLS_U32_PERF
925 struct tc_u32_pcnt *gpf;
929 if (nla_put(skb, TCA_U32_SEL,
930 sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
932 goto nla_put_failure;
934 ht_up = rtnl_dereference(n->ht_up);
936 u32 htid = n->handle & 0xFFFFF000;
937 if (nla_put_u32(skb, TCA_U32_HASH, htid))
938 goto nla_put_failure;
940 if (n->res.classid &&
941 nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid))
942 goto nla_put_failure;
944 ht_down = rtnl_dereference(n->ht_down);
946 nla_put_u32(skb, TCA_U32_LINK, ht_down->handle))
947 goto nla_put_failure;
949 #ifdef CONFIG_CLS_U32_MARK
950 if ((n->val || n->mask)) {
951 struct tc_u32_mark mark = {.val = n->val,
956 for_each_possible_cpu(cpum) {
957 __u32 cnt = *per_cpu_ptr(n->pcpu_success, cpum);
962 if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark))
963 goto nla_put_failure;
967 if (tcf_exts_dump(skb, &n->exts) < 0)
968 goto nla_put_failure;
970 #ifdef CONFIG_NET_CLS_IND
972 struct net_device *dev;
973 dev = __dev_get_by_index(net, n->ifindex);
974 if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name))
975 goto nla_put_failure;
978 #ifdef CONFIG_CLS_U32_PERF
979 gpf = kzalloc(sizeof(struct tc_u32_pcnt) +
980 n->sel.nkeys * sizeof(u64),
983 goto nla_put_failure;
985 for_each_possible_cpu(cpu) {
987 struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu);
989 gpf->rcnt += pf->rcnt;
990 gpf->rhit += pf->rhit;
991 for (i = 0; i < n->sel.nkeys; i++)
992 gpf->kcnts[i] += pf->kcnts[i];
995 if (nla_put(skb, TCA_U32_PCNT,
996 sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
999 goto nla_put_failure;
1005 nla_nest_end(skb, nest);
1007 if (TC_U32_KEY(n->handle))
1008 if (tcf_exts_dump_stats(skb, &n->exts) < 0)
1009 goto nla_put_failure;
1013 nla_nest_cancel(skb, nest);
1017 static struct tcf_proto_ops cls_u32_ops __read_mostly = {
1019 .classify = u32_classify,
1021 .destroy = u32_destroy,
1023 .change = u32_change,
1024 .delete = u32_delete,
1027 .owner = THIS_MODULE,
1030 static int __init init_u32(void)
1032 pr_info("u32 classifier\n");
1033 #ifdef CONFIG_CLS_U32_PERF
1034 pr_info(" Performance counters on\n");
1036 #ifdef CONFIG_NET_CLS_IND
1037 pr_info(" input device check on\n");
1039 #ifdef CONFIG_NET_CLS_ACT
1040 pr_info(" Actions configured\n");
1042 return register_tcf_proto_ops(&cls_u32_ops);
1045 static void __exit exit_u32(void)
1047 unregister_tcf_proto_ops(&cls_u32_ops);
1050 module_init(init_u32)
1051 module_exit(exit_u32)
1052 MODULE_LICENSE("GPL");