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61#include <linux/slab.h>
62#include <linux/module.h>
63#include <linux/types.h>
64#include <linux/kernel.h>
65#include <linux/sched.h>
66#include <linux/string.h>
67#include <linux/skbuff.h>
68#include <linux/random.h>
69#include <linux/if_vlan.h>
70#include <linux/tc_ematch/tc_em_meta.h>
71#include <net/dst.h>
72#include <net/route.h>
73#include <net/pkt_cls.h>
74#include <net/sock.h>
75
76struct meta_obj {
77 unsigned long value;
78 unsigned int len;
79};
80
81struct meta_value {
82 struct tcf_meta_val hdr;
83 unsigned long val;
84 unsigned int len;
85};
86
87struct meta_match {
88 struct meta_value lvalue;
89 struct meta_value rvalue;
90};
91
92static inline int meta_id(struct meta_value *v)
93{
94 return TCF_META_ID(v->hdr.kind);
95}
96
97static inline int meta_type(struct meta_value *v)
98{
99 return TCF_META_TYPE(v->hdr.kind);
100}
101
102#define META_COLLECTOR(FUNC) static void meta_##FUNC(struct sk_buff *skb, \
103 struct tcf_pkt_info *info, struct meta_value *v, \
104 struct meta_obj *dst, int *err)
105
106
107
108
109
110META_COLLECTOR(int_random)
111{
112 get_random_bytes(&dst->value, sizeof(dst->value));
113}
114
115static inline unsigned long fixed_loadavg(int load)
116{
117 int rnd_load = load + (FIXED_1/200);
118 int rnd_frac = ((rnd_load & (FIXED_1-1)) * 100) >> FSHIFT;
119
120 return ((rnd_load >> FSHIFT) * 100) + rnd_frac;
121}
122
123META_COLLECTOR(int_loadavg_0)
124{
125 dst->value = fixed_loadavg(avenrun[0]);
126}
127
128META_COLLECTOR(int_loadavg_1)
129{
130 dst->value = fixed_loadavg(avenrun[1]);
131}
132
133META_COLLECTOR(int_loadavg_2)
134{
135 dst->value = fixed_loadavg(avenrun[2]);
136}
137
138
139
140
141
142static inline int int_dev(struct net_device *dev, struct meta_obj *dst)
143{
144 if (unlikely(dev == NULL))
145 return -1;
146
147 dst->value = dev->ifindex;
148 return 0;
149}
150
151static inline int var_dev(struct net_device *dev, struct meta_obj *dst)
152{
153 if (unlikely(dev == NULL))
154 return -1;
155
156 dst->value = (unsigned long) dev->name;
157 dst->len = strlen(dev->name);
158 return 0;
159}
160
161META_COLLECTOR(int_dev)
162{
163 *err = int_dev(skb->dev, dst);
164}
165
166META_COLLECTOR(var_dev)
167{
168 *err = var_dev(skb->dev, dst);
169}
170
171
172
173
174
175META_COLLECTOR(int_vlan_tag)
176{
177 unsigned short tag;
178
179 tag = vlan_tx_tag_get(skb);
180 if (!tag && __vlan_get_tag(skb, &tag))
181 *err = -1;
182 else
183 dst->value = tag;
184}
185
186
187
188
189
190
191
192META_COLLECTOR(int_priority)
193{
194 dst->value = skb->priority;
195}
196
197META_COLLECTOR(int_protocol)
198{
199
200 dst->value = skb->protocol;
201}
202
203META_COLLECTOR(int_pkttype)
204{
205 dst->value = skb->pkt_type;
206}
207
208META_COLLECTOR(int_pktlen)
209{
210 dst->value = skb->len;
211}
212
213META_COLLECTOR(int_datalen)
214{
215 dst->value = skb->data_len;
216}
217
218META_COLLECTOR(int_maclen)
219{
220 dst->value = skb->mac_len;
221}
222
223META_COLLECTOR(int_rxhash)
224{
225 dst->value = skb_get_rxhash(skb);
226}
227
228
229
230
231
232META_COLLECTOR(int_mark)
233{
234 dst->value = skb->mark;
235}
236
237
238
239
240
241META_COLLECTOR(int_tcindex)
242{
243 dst->value = skb->tc_index;
244}
245
246
247
248
249
250META_COLLECTOR(int_rtclassid)
251{
252 if (unlikely(skb_dst(skb) == NULL))
253 *err = -1;
254 else
255#ifdef CONFIG_IP_ROUTE_CLASSID
256 dst->value = skb_dst(skb)->tclassid;
257#else
258 dst->value = 0;
259#endif
260}
261
262META_COLLECTOR(int_rtiif)
263{
264 if (unlikely(skb_rtable(skb) == NULL))
265 *err = -1;
266 else
267 dst->value = inet_iif(skb);
268}
269
270
271
272
273
274#define SKIP_NONLOCAL(skb) \
275 if (unlikely(skb->sk == NULL)) { \
276 *err = -1; \
277 return; \
278 }
279
280META_COLLECTOR(int_sk_family)
281{
282 SKIP_NONLOCAL(skb);
283 dst->value = skb->sk->sk_family;
284}
285
286META_COLLECTOR(int_sk_state)
287{
288 SKIP_NONLOCAL(skb);
289 dst->value = skb->sk->sk_state;
290}
291
292META_COLLECTOR(int_sk_reuse)
293{
294 SKIP_NONLOCAL(skb);
295 dst->value = skb->sk->sk_reuse;
296}
297
298META_COLLECTOR(int_sk_bound_if)
299{
300 SKIP_NONLOCAL(skb);
301
302 dst->value = skb->sk->sk_bound_dev_if;
303}
304
305META_COLLECTOR(var_sk_bound_if)
306{
307 SKIP_NONLOCAL(skb);
308
309 if (skb->sk->sk_bound_dev_if == 0) {
310 dst->value = (unsigned long) "any";
311 dst->len = 3;
312 } else {
313 struct net_device *dev;
314
315 rcu_read_lock();
316 dev = dev_get_by_index_rcu(sock_net(skb->sk),
317 skb->sk->sk_bound_dev_if);
318 *err = var_dev(dev, dst);
319 rcu_read_unlock();
320 }
321}
322
323META_COLLECTOR(int_sk_refcnt)
324{
325 SKIP_NONLOCAL(skb);
326 dst->value = atomic_read(&skb->sk->sk_refcnt);
327}
328
329META_COLLECTOR(int_sk_rcvbuf)
330{
331 SKIP_NONLOCAL(skb);
332 dst->value = skb->sk->sk_rcvbuf;
333}
334
335META_COLLECTOR(int_sk_shutdown)
336{
337 SKIP_NONLOCAL(skb);
338 dst->value = skb->sk->sk_shutdown;
339}
340
341META_COLLECTOR(int_sk_proto)
342{
343 SKIP_NONLOCAL(skb);
344 dst->value = skb->sk->sk_protocol;
345}
346
347META_COLLECTOR(int_sk_type)
348{
349 SKIP_NONLOCAL(skb);
350 dst->value = skb->sk->sk_type;
351}
352
353META_COLLECTOR(int_sk_rmem_alloc)
354{
355 SKIP_NONLOCAL(skb);
356 dst->value = sk_rmem_alloc_get(skb->sk);
357}
358
359META_COLLECTOR(int_sk_wmem_alloc)
360{
361 SKIP_NONLOCAL(skb);
362 dst->value = sk_wmem_alloc_get(skb->sk);
363}
364
365META_COLLECTOR(int_sk_omem_alloc)
366{
367 SKIP_NONLOCAL(skb);
368 dst->value = atomic_read(&skb->sk->sk_omem_alloc);
369}
370
371META_COLLECTOR(int_sk_rcv_qlen)
372{
373 SKIP_NONLOCAL(skb);
374 dst->value = skb->sk->sk_receive_queue.qlen;
375}
376
377META_COLLECTOR(int_sk_snd_qlen)
378{
379 SKIP_NONLOCAL(skb);
380 dst->value = skb->sk->sk_write_queue.qlen;
381}
382
383META_COLLECTOR(int_sk_wmem_queued)
384{
385 SKIP_NONLOCAL(skb);
386 dst->value = skb->sk->sk_wmem_queued;
387}
388
389META_COLLECTOR(int_sk_fwd_alloc)
390{
391 SKIP_NONLOCAL(skb);
392 dst->value = skb->sk->sk_forward_alloc;
393}
394
395META_COLLECTOR(int_sk_sndbuf)
396{
397 SKIP_NONLOCAL(skb);
398 dst->value = skb->sk->sk_sndbuf;
399}
400
401META_COLLECTOR(int_sk_alloc)
402{
403 SKIP_NONLOCAL(skb);
404 dst->value = (__force int) skb->sk->sk_allocation;
405}
406
407META_COLLECTOR(int_sk_hash)
408{
409 SKIP_NONLOCAL(skb);
410 dst->value = skb->sk->sk_hash;
411}
412
413META_COLLECTOR(int_sk_lingertime)
414{
415 SKIP_NONLOCAL(skb);
416 dst->value = skb->sk->sk_lingertime / HZ;
417}
418
419META_COLLECTOR(int_sk_err_qlen)
420{
421 SKIP_NONLOCAL(skb);
422 dst->value = skb->sk->sk_error_queue.qlen;
423}
424
425META_COLLECTOR(int_sk_ack_bl)
426{
427 SKIP_NONLOCAL(skb);
428 dst->value = skb->sk->sk_ack_backlog;
429}
430
431META_COLLECTOR(int_sk_max_ack_bl)
432{
433 SKIP_NONLOCAL(skb);
434 dst->value = skb->sk->sk_max_ack_backlog;
435}
436
437META_COLLECTOR(int_sk_prio)
438{
439 SKIP_NONLOCAL(skb);
440 dst->value = skb->sk->sk_priority;
441}
442
443META_COLLECTOR(int_sk_rcvlowat)
444{
445 SKIP_NONLOCAL(skb);
446 dst->value = skb->sk->sk_rcvlowat;
447}
448
449META_COLLECTOR(int_sk_rcvtimeo)
450{
451 SKIP_NONLOCAL(skb);
452 dst->value = skb->sk->sk_rcvtimeo / HZ;
453}
454
455META_COLLECTOR(int_sk_sndtimeo)
456{
457 SKIP_NONLOCAL(skb);
458 dst->value = skb->sk->sk_sndtimeo / HZ;
459}
460
461META_COLLECTOR(int_sk_sendmsg_off)
462{
463 SKIP_NONLOCAL(skb);
464 dst->value = skb->sk->sk_frag.offset;
465}
466
467META_COLLECTOR(int_sk_write_pend)
468{
469 SKIP_NONLOCAL(skb);
470 dst->value = skb->sk->sk_write_pending;
471}
472
473
474
475
476
477struct meta_ops {
478 void (*get)(struct sk_buff *, struct tcf_pkt_info *,
479 struct meta_value *, struct meta_obj *, int *);
480};
481
482#define META_ID(name) TCF_META_ID_##name
483#define META_FUNC(name) { .get = meta_##name }
484
485
486
487static struct meta_ops __meta_ops[TCF_META_TYPE_MAX + 1][TCF_META_ID_MAX + 1] = {
488 [TCF_META_TYPE_VAR] = {
489 [META_ID(DEV)] = META_FUNC(var_dev),
490 [META_ID(SK_BOUND_IF)] = META_FUNC(var_sk_bound_if),
491 },
492 [TCF_META_TYPE_INT] = {
493 [META_ID(RANDOM)] = META_FUNC(int_random),
494 [META_ID(LOADAVG_0)] = META_FUNC(int_loadavg_0),
495 [META_ID(LOADAVG_1)] = META_FUNC(int_loadavg_1),
496 [META_ID(LOADAVG_2)] = META_FUNC(int_loadavg_2),
497 [META_ID(DEV)] = META_FUNC(int_dev),
498 [META_ID(PRIORITY)] = META_FUNC(int_priority),
499 [META_ID(PROTOCOL)] = META_FUNC(int_protocol),
500 [META_ID(PKTTYPE)] = META_FUNC(int_pkttype),
501 [META_ID(PKTLEN)] = META_FUNC(int_pktlen),
502 [META_ID(DATALEN)] = META_FUNC(int_datalen),
503 [META_ID(MACLEN)] = META_FUNC(int_maclen),
504 [META_ID(NFMARK)] = META_FUNC(int_mark),
505 [META_ID(TCINDEX)] = META_FUNC(int_tcindex),
506 [META_ID(RTCLASSID)] = META_FUNC(int_rtclassid),
507 [META_ID(RTIIF)] = META_FUNC(int_rtiif),
508 [META_ID(SK_FAMILY)] = META_FUNC(int_sk_family),
509 [META_ID(SK_STATE)] = META_FUNC(int_sk_state),
510 [META_ID(SK_REUSE)] = META_FUNC(int_sk_reuse),
511 [META_ID(SK_BOUND_IF)] = META_FUNC(int_sk_bound_if),
512 [META_ID(SK_REFCNT)] = META_FUNC(int_sk_refcnt),
513 [META_ID(SK_RCVBUF)] = META_FUNC(int_sk_rcvbuf),
514 [META_ID(SK_SNDBUF)] = META_FUNC(int_sk_sndbuf),
515 [META_ID(SK_SHUTDOWN)] = META_FUNC(int_sk_shutdown),
516 [META_ID(SK_PROTO)] = META_FUNC(int_sk_proto),
517 [META_ID(SK_TYPE)] = META_FUNC(int_sk_type),
518 [META_ID(SK_RMEM_ALLOC)] = META_FUNC(int_sk_rmem_alloc),
519 [META_ID(SK_WMEM_ALLOC)] = META_FUNC(int_sk_wmem_alloc),
520 [META_ID(SK_OMEM_ALLOC)] = META_FUNC(int_sk_omem_alloc),
521 [META_ID(SK_WMEM_QUEUED)] = META_FUNC(int_sk_wmem_queued),
522 [META_ID(SK_RCV_QLEN)] = META_FUNC(int_sk_rcv_qlen),
523 [META_ID(SK_SND_QLEN)] = META_FUNC(int_sk_snd_qlen),
524 [META_ID(SK_ERR_QLEN)] = META_FUNC(int_sk_err_qlen),
525 [META_ID(SK_FORWARD_ALLOCS)] = META_FUNC(int_sk_fwd_alloc),
526 [META_ID(SK_ALLOCS)] = META_FUNC(int_sk_alloc),
527 [META_ID(SK_HASH)] = META_FUNC(int_sk_hash),
528 [META_ID(SK_LINGERTIME)] = META_FUNC(int_sk_lingertime),
529 [META_ID(SK_ACK_BACKLOG)] = META_FUNC(int_sk_ack_bl),
530 [META_ID(SK_MAX_ACK_BACKLOG)] = META_FUNC(int_sk_max_ack_bl),
531 [META_ID(SK_PRIO)] = META_FUNC(int_sk_prio),
532 [META_ID(SK_RCVLOWAT)] = META_FUNC(int_sk_rcvlowat),
533 [META_ID(SK_RCVTIMEO)] = META_FUNC(int_sk_rcvtimeo),
534 [META_ID(SK_SNDTIMEO)] = META_FUNC(int_sk_sndtimeo),
535 [META_ID(SK_SENDMSG_OFF)] = META_FUNC(int_sk_sendmsg_off),
536 [META_ID(SK_WRITE_PENDING)] = META_FUNC(int_sk_write_pend),
537 [META_ID(VLAN_TAG)] = META_FUNC(int_vlan_tag),
538 [META_ID(RXHASH)] = META_FUNC(int_rxhash),
539 }
540};
541
542static inline struct meta_ops *meta_ops(struct meta_value *val)
543{
544 return &__meta_ops[meta_type(val)][meta_id(val)];
545}
546
547
548
549
550
551static int meta_var_compare(struct meta_obj *a, struct meta_obj *b)
552{
553 int r = a->len - b->len;
554
555 if (r == 0)
556 r = memcmp((void *) a->value, (void *) b->value, a->len);
557
558 return r;
559}
560
561static int meta_var_change(struct meta_value *dst, struct nlattr *nla)
562{
563 int len = nla_len(nla);
564
565 dst->val = (unsigned long)kmemdup(nla_data(nla), len, GFP_KERNEL);
566 if (dst->val == 0UL)
567 return -ENOMEM;
568 dst->len = len;
569 return 0;
570}
571
572static void meta_var_destroy(struct meta_value *v)
573{
574 kfree((void *) v->val);
575}
576
577static void meta_var_apply_extras(struct meta_value *v,
578 struct meta_obj *dst)
579{
580 int shift = v->hdr.shift;
581
582 if (shift && shift < dst->len)
583 dst->len -= shift;
584}
585
586static int meta_var_dump(struct sk_buff *skb, struct meta_value *v, int tlv)
587{
588 if (v->val && v->len &&
589 nla_put(skb, tlv, v->len, (void *) v->val))
590 goto nla_put_failure;
591 return 0;
592
593nla_put_failure:
594 return -1;
595}
596
597
598
599
600
601static int meta_int_compare(struct meta_obj *a, struct meta_obj *b)
602{
603
604
605
606 if (unlikely(a->value == b->value))
607 return 0;
608 else if (a->value < b->value)
609 return -1;
610 else
611 return 1;
612}
613
614static int meta_int_change(struct meta_value *dst, struct nlattr *nla)
615{
616 if (nla_len(nla) >= sizeof(unsigned long)) {
617 dst->val = *(unsigned long *) nla_data(nla);
618 dst->len = sizeof(unsigned long);
619 } else if (nla_len(nla) == sizeof(u32)) {
620 dst->val = nla_get_u32(nla);
621 dst->len = sizeof(u32);
622 } else
623 return -EINVAL;
624
625 return 0;
626}
627
628static void meta_int_apply_extras(struct meta_value *v,
629 struct meta_obj *dst)
630{
631 if (v->hdr.shift)
632 dst->value >>= v->hdr.shift;
633
634 if (v->val)
635 dst->value &= v->val;
636}
637
638static int meta_int_dump(struct sk_buff *skb, struct meta_value *v, int tlv)
639{
640 if (v->len == sizeof(unsigned long)) {
641 if (nla_put(skb, tlv, sizeof(unsigned long), &v->val))
642 goto nla_put_failure;
643 } else if (v->len == sizeof(u32)) {
644 if (nla_put_u32(skb, tlv, v->val))
645 goto nla_put_failure;
646 }
647
648 return 0;
649
650nla_put_failure:
651 return -1;
652}
653
654
655
656
657
658struct meta_type_ops {
659 void (*destroy)(struct meta_value *);
660 int (*compare)(struct meta_obj *, struct meta_obj *);
661 int (*change)(struct meta_value *, struct nlattr *);
662 void (*apply_extras)(struct meta_value *, struct meta_obj *);
663 int (*dump)(struct sk_buff *, struct meta_value *, int);
664};
665
666static struct meta_type_ops __meta_type_ops[TCF_META_TYPE_MAX + 1] = {
667 [TCF_META_TYPE_VAR] = {
668 .destroy = meta_var_destroy,
669 .compare = meta_var_compare,
670 .change = meta_var_change,
671 .apply_extras = meta_var_apply_extras,
672 .dump = meta_var_dump
673 },
674 [TCF_META_TYPE_INT] = {
675 .compare = meta_int_compare,
676 .change = meta_int_change,
677 .apply_extras = meta_int_apply_extras,
678 .dump = meta_int_dump
679 }
680};
681
682static inline struct meta_type_ops *meta_type_ops(struct meta_value *v)
683{
684 return &__meta_type_ops[meta_type(v)];
685}
686
687
688
689
690
691static int meta_get(struct sk_buff *skb, struct tcf_pkt_info *info,
692 struct meta_value *v, struct meta_obj *dst)
693{
694 int err = 0;
695
696 if (meta_id(v) == TCF_META_ID_VALUE) {
697 dst->value = v->val;
698 dst->len = v->len;
699 return 0;
700 }
701
702 meta_ops(v)->get(skb, info, v, dst, &err);
703 if (err < 0)
704 return err;
705
706 if (meta_type_ops(v)->apply_extras)
707 meta_type_ops(v)->apply_extras(v, dst);
708
709 return 0;
710}
711
712static int em_meta_match(struct sk_buff *skb, struct tcf_ematch *m,
713 struct tcf_pkt_info *info)
714{
715 int r;
716 struct meta_match *meta = (struct meta_match *) m->data;
717 struct meta_obj l_value, r_value;
718
719 if (meta_get(skb, info, &meta->lvalue, &l_value) < 0 ||
720 meta_get(skb, info, &meta->rvalue, &r_value) < 0)
721 return 0;
722
723 r = meta_type_ops(&meta->lvalue)->compare(&l_value, &r_value);
724
725 switch (meta->lvalue.hdr.op) {
726 case TCF_EM_OPND_EQ:
727 return !r;
728 case TCF_EM_OPND_LT:
729 return r < 0;
730 case TCF_EM_OPND_GT:
731 return r > 0;
732 }
733
734 return 0;
735}
736
737static void meta_delete(struct meta_match *meta)
738{
739 if (meta) {
740 struct meta_type_ops *ops = meta_type_ops(&meta->lvalue);
741
742 if (ops && ops->destroy) {
743 ops->destroy(&meta->lvalue);
744 ops->destroy(&meta->rvalue);
745 }
746 }
747
748 kfree(meta);
749}
750
751static inline int meta_change_data(struct meta_value *dst, struct nlattr *nla)
752{
753 if (nla) {
754 if (nla_len(nla) == 0)
755 return -EINVAL;
756
757 return meta_type_ops(dst)->change(dst, nla);
758 }
759
760 return 0;
761}
762
763static inline int meta_is_supported(struct meta_value *val)
764{
765 return !meta_id(val) || meta_ops(val)->get;
766}
767
768static const struct nla_policy meta_policy[TCA_EM_META_MAX + 1] = {
769 [TCA_EM_META_HDR] = { .len = sizeof(struct tcf_meta_hdr) },
770};
771
772static int em_meta_change(struct tcf_proto *tp, void *data, int len,
773 struct tcf_ematch *m)
774{
775 int err;
776 struct nlattr *tb[TCA_EM_META_MAX + 1];
777 struct tcf_meta_hdr *hdr;
778 struct meta_match *meta = NULL;
779
780 err = nla_parse(tb, TCA_EM_META_MAX, data, len, meta_policy);
781 if (err < 0)
782 goto errout;
783
784 err = -EINVAL;
785 if (tb[TCA_EM_META_HDR] == NULL)
786 goto errout;
787 hdr = nla_data(tb[TCA_EM_META_HDR]);
788
789 if (TCF_META_TYPE(hdr->left.kind) != TCF_META_TYPE(hdr->right.kind) ||
790 TCF_META_TYPE(hdr->left.kind) > TCF_META_TYPE_MAX ||
791 TCF_META_ID(hdr->left.kind) > TCF_META_ID_MAX ||
792 TCF_META_ID(hdr->right.kind) > TCF_META_ID_MAX)
793 goto errout;
794
795 meta = kzalloc(sizeof(*meta), GFP_KERNEL);
796 if (meta == NULL)
797 goto errout;
798
799 memcpy(&meta->lvalue.hdr, &hdr->left, sizeof(hdr->left));
800 memcpy(&meta->rvalue.hdr, &hdr->right, sizeof(hdr->right));
801
802 if (!meta_is_supported(&meta->lvalue) ||
803 !meta_is_supported(&meta->rvalue)) {
804 err = -EOPNOTSUPP;
805 goto errout;
806 }
807
808 if (meta_change_data(&meta->lvalue, tb[TCA_EM_META_LVALUE]) < 0 ||
809 meta_change_data(&meta->rvalue, tb[TCA_EM_META_RVALUE]) < 0)
810 goto errout;
811
812 m->datalen = sizeof(*meta);
813 m->data = (unsigned long) meta;
814
815 err = 0;
816errout:
817 if (err && meta)
818 meta_delete(meta);
819 return err;
820}
821
822static void em_meta_destroy(struct tcf_proto *tp, struct tcf_ematch *m)
823{
824 if (m)
825 meta_delete((struct meta_match *) m->data);
826}
827
828static int em_meta_dump(struct sk_buff *skb, struct tcf_ematch *em)
829{
830 struct meta_match *meta = (struct meta_match *) em->data;
831 struct tcf_meta_hdr hdr;
832 struct meta_type_ops *ops;
833
834 memset(&hdr, 0, sizeof(hdr));
835 memcpy(&hdr.left, &meta->lvalue.hdr, sizeof(hdr.left));
836 memcpy(&hdr.right, &meta->rvalue.hdr, sizeof(hdr.right));
837
838 if (nla_put(skb, TCA_EM_META_HDR, sizeof(hdr), &hdr))
839 goto nla_put_failure;
840
841 ops = meta_type_ops(&meta->lvalue);
842 if (ops->dump(skb, &meta->lvalue, TCA_EM_META_LVALUE) < 0 ||
843 ops->dump(skb, &meta->rvalue, TCA_EM_META_RVALUE) < 0)
844 goto nla_put_failure;
845
846 return 0;
847
848nla_put_failure:
849 return -1;
850}
851
852static struct tcf_ematch_ops em_meta_ops = {
853 .kind = TCF_EM_META,
854 .change = em_meta_change,
855 .match = em_meta_match,
856 .destroy = em_meta_destroy,
857 .dump = em_meta_dump,
858 .owner = THIS_MODULE,
859 .link = LIST_HEAD_INIT(em_meta_ops.link)
860};
861
862static int __init init_em_meta(void)
863{
864 return tcf_em_register(&em_meta_ops);
865}
866
867static void __exit exit_em_meta(void)
868{
869 tcf_em_unregister(&em_meta_ops);
870}
871
872MODULE_LICENSE("GPL");
873
874module_init(init_em_meta);
875module_exit(exit_em_meta);
876
877MODULE_ALIAS_TCF_EMATCH(TCF_EM_META);
878
