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15#include <linux/module.h>
16#include <linux/types.h>
17#include <linux/skbuff.h>
18#include <linux/filter.h>
19#include <linux/bpf.h>
20#include <linux/idr.h>
21
22#include <net/rtnetlink.h>
23#include <net/pkt_cls.h>
24#include <net/sock.h>
25
26MODULE_LICENSE("GPL");
27MODULE_AUTHOR("Daniel Borkmann <dborkman@redhat.com>");
28MODULE_DESCRIPTION("TC BPF based classifier");
29
30#define CLS_BPF_NAME_LEN 256
31#define CLS_BPF_SUPPORTED_GEN_FLAGS \
32 (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)
33
34struct cls_bpf_head {
35 struct list_head plist;
36 struct idr handle_idr;
37 struct rcu_head rcu;
38};
39
40struct cls_bpf_prog {
41 struct bpf_prog *filter;
42 struct list_head link;
43 struct tcf_result res;
44 bool exts_integrated;
45 u32 gen_flags;
46 unsigned int in_hw_count;
47 struct tcf_exts exts;
48 u32 handle;
49 u16 bpf_num_ops;
50 struct sock_filter *bpf_ops;
51 const char *bpf_name;
52 struct tcf_proto *tp;
53 struct rcu_work rwork;
54};
55
56static const struct nla_policy bpf_policy[TCA_BPF_MAX + 1] = {
57 [TCA_BPF_CLASSID] = { .type = NLA_U32 },
58 [TCA_BPF_FLAGS] = { .type = NLA_U32 },
59 [TCA_BPF_FLAGS_GEN] = { .type = NLA_U32 },
60 [TCA_BPF_FD] = { .type = NLA_U32 },
61 [TCA_BPF_NAME] = { .type = NLA_NUL_STRING,
62 .len = CLS_BPF_NAME_LEN },
63 [TCA_BPF_OPS_LEN] = { .type = NLA_U16 },
64 [TCA_BPF_OPS] = { .type = NLA_BINARY,
65 .len = sizeof(struct sock_filter) * BPF_MAXINSNS },
66};
67
68static int cls_bpf_exec_opcode(int code)
69{
70 switch (code) {
71 case TC_ACT_OK:
72 case TC_ACT_SHOT:
73 case TC_ACT_STOLEN:
74 case TC_ACT_TRAP:
75 case TC_ACT_REDIRECT:
76 case TC_ACT_UNSPEC:
77 return code;
78 default:
79 return TC_ACT_UNSPEC;
80 }
81}
82
83static int cls_bpf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
84 struct tcf_result *res)
85{
86 struct cls_bpf_head *head = rcu_dereference_bh(tp->root);
87 bool at_ingress = skb_at_tc_ingress(skb);
88 struct cls_bpf_prog *prog;
89 int ret = -1;
90
91
92 rcu_read_lock();
93 list_for_each_entry_rcu(prog, &head->plist, link) {
94 int filter_res;
95
96 qdisc_skb_cb(skb)->tc_classid = prog->res.classid;
97
98 if (tc_skip_sw(prog->gen_flags)) {
99 filter_res = prog->exts_integrated ? TC_ACT_UNSPEC : 0;
100 } else if (at_ingress) {
101
102 __skb_push(skb, skb->mac_len);
103 bpf_compute_data_pointers(skb);
104 filter_res = BPF_PROG_RUN(prog->filter, skb);
105 __skb_pull(skb, skb->mac_len);
106 } else {
107 bpf_compute_data_pointers(skb);
108 filter_res = BPF_PROG_RUN(prog->filter, skb);
109 }
110
111 if (prog->exts_integrated) {
112 res->class = 0;
113 res->classid = TC_H_MAJ(prog->res.classid) |
114 qdisc_skb_cb(skb)->tc_classid;
115
116 ret = cls_bpf_exec_opcode(filter_res);
117 if (ret == TC_ACT_UNSPEC)
118 continue;
119 break;
120 }
121
122 if (filter_res == 0)
123 continue;
124 if (filter_res != -1) {
125 res->class = 0;
126 res->classid = filter_res;
127 } else {
128 *res = prog->res;
129 }
130
131 ret = tcf_exts_exec(skb, &prog->exts, res);
132 if (ret < 0)
133 continue;
134
135 break;
136 }
137 rcu_read_unlock();
138
139 return ret;
140}
141
142static bool cls_bpf_is_ebpf(const struct cls_bpf_prog *prog)
143{
144 return !prog->bpf_ops;
145}
146
147static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog,
148 struct cls_bpf_prog *oldprog,
149 struct netlink_ext_ack *extack)
150{
151 struct tcf_block *block = tp->chain->block;
152 struct tc_cls_bpf_offload cls_bpf = {};
153 struct cls_bpf_prog *obj;
154 bool skip_sw;
155 int err;
156
157 skip_sw = prog && tc_skip_sw(prog->gen_flags);
158 obj = prog ?: oldprog;
159
160 tc_cls_common_offload_init(&cls_bpf.common, tp, obj->gen_flags,
161 extack);
162 cls_bpf.command = TC_CLSBPF_OFFLOAD;
163 cls_bpf.exts = &obj->exts;
164 cls_bpf.prog = prog ? prog->filter : NULL;
165 cls_bpf.oldprog = oldprog ? oldprog->filter : NULL;
166 cls_bpf.name = obj->bpf_name;
167 cls_bpf.exts_integrated = obj->exts_integrated;
168
169 if (oldprog)
170 tcf_block_offload_dec(block, &oldprog->gen_flags);
171
172 err = tc_setup_cb_call(block, TC_SETUP_CLSBPF, &cls_bpf, skip_sw);
173 if (prog) {
174 if (err < 0) {
175 cls_bpf_offload_cmd(tp, oldprog, prog, extack);
176 return err;
177 } else if (err > 0) {
178 prog->in_hw_count = err;
179 tcf_block_offload_inc(block, &prog->gen_flags);
180 }
181 }
182
183 if (prog && skip_sw && !(prog->gen_flags & TCA_CLS_FLAGS_IN_HW))
184 return -EINVAL;
185
186 return 0;
187}
188
189static u32 cls_bpf_flags(u32 flags)
190{
191 return flags & CLS_BPF_SUPPORTED_GEN_FLAGS;
192}
193
194static int cls_bpf_offload(struct tcf_proto *tp, struct cls_bpf_prog *prog,
195 struct cls_bpf_prog *oldprog,
196 struct netlink_ext_ack *extack)
197{
198 if (prog && oldprog &&
199 cls_bpf_flags(prog->gen_flags) !=
200 cls_bpf_flags(oldprog->gen_flags))
201 return -EINVAL;
202
203 if (prog && tc_skip_hw(prog->gen_flags))
204 prog = NULL;
205 if (oldprog && tc_skip_hw(oldprog->gen_flags))
206 oldprog = NULL;
207 if (!prog && !oldprog)
208 return 0;
209
210 return cls_bpf_offload_cmd(tp, prog, oldprog, extack);
211}
212
213static void cls_bpf_stop_offload(struct tcf_proto *tp,
214 struct cls_bpf_prog *prog,
215 struct netlink_ext_ack *extack)
216{
217 int err;
218
219 err = cls_bpf_offload_cmd(tp, NULL, prog, extack);
220 if (err)
221 pr_err("Stopping hardware offload failed: %d\n", err);
222}
223
224static void cls_bpf_offload_update_stats(struct tcf_proto *tp,
225 struct cls_bpf_prog *prog)
226{
227 struct tcf_block *block = tp->chain->block;
228 struct tc_cls_bpf_offload cls_bpf = {};
229
230 tc_cls_common_offload_init(&cls_bpf.common, tp, prog->gen_flags, NULL);
231 cls_bpf.command = TC_CLSBPF_STATS;
232 cls_bpf.exts = &prog->exts;
233 cls_bpf.prog = prog->filter;
234 cls_bpf.name = prog->bpf_name;
235 cls_bpf.exts_integrated = prog->exts_integrated;
236
237 tc_setup_cb_call(block, TC_SETUP_CLSBPF, &cls_bpf, false);
238}
239
240static int cls_bpf_init(struct tcf_proto *tp)
241{
242 struct cls_bpf_head *head;
243
244 head = kzalloc(sizeof(*head), GFP_KERNEL);
245 if (head == NULL)
246 return -ENOBUFS;
247
248 INIT_LIST_HEAD_RCU(&head->plist);
249 idr_init(&head->handle_idr);
250 rcu_assign_pointer(tp->root, head);
251
252 return 0;
253}
254
255static void cls_bpf_free_parms(struct cls_bpf_prog *prog)
256{
257 if (cls_bpf_is_ebpf(prog))
258 bpf_prog_put(prog->filter);
259 else
260 bpf_prog_destroy(prog->filter);
261
262 kfree(prog->bpf_name);
263 kfree(prog->bpf_ops);
264}
265
266static void __cls_bpf_delete_prog(struct cls_bpf_prog *prog)
267{
268 tcf_exts_destroy(&prog->exts);
269 tcf_exts_put_net(&prog->exts);
270
271 cls_bpf_free_parms(prog);
272 kfree(prog);
273}
274
275static void cls_bpf_delete_prog_work(struct work_struct *work)
276{
277 struct cls_bpf_prog *prog = container_of(to_rcu_work(work),
278 struct cls_bpf_prog,
279 rwork);
280 rtnl_lock();
281 __cls_bpf_delete_prog(prog);
282 rtnl_unlock();
283}
284
285static void __cls_bpf_delete(struct tcf_proto *tp, struct cls_bpf_prog *prog,
286 struct netlink_ext_ack *extack)
287{
288 struct cls_bpf_head *head = rtnl_dereference(tp->root);
289
290 idr_remove(&head->handle_idr, prog->handle);
291 cls_bpf_stop_offload(tp, prog, extack);
292 list_del_rcu(&prog->link);
293 tcf_unbind_filter(tp, &prog->res);
294 if (tcf_exts_get_net(&prog->exts))
295 tcf_queue_work(&prog->rwork, cls_bpf_delete_prog_work);
296 else
297 __cls_bpf_delete_prog(prog);
298}
299
300static int cls_bpf_delete(struct tcf_proto *tp, void *arg, bool *last,
301 struct netlink_ext_ack *extack)
302{
303 struct cls_bpf_head *head = rtnl_dereference(tp->root);
304
305 __cls_bpf_delete(tp, arg, extack);
306 *last = list_empty(&head->plist);
307 return 0;
308}
309
310static void cls_bpf_destroy(struct tcf_proto *tp,
311 struct netlink_ext_ack *extack)
312{
313 struct cls_bpf_head *head = rtnl_dereference(tp->root);
314 struct cls_bpf_prog *prog, *tmp;
315
316 list_for_each_entry_safe(prog, tmp, &head->plist, link)
317 __cls_bpf_delete(tp, prog, extack);
318
319 idr_destroy(&head->handle_idr);
320 kfree_rcu(head, rcu);
321}
322
323static void *cls_bpf_get(struct tcf_proto *tp, u32 handle)
324{
325 struct cls_bpf_head *head = rtnl_dereference(tp->root);
326 struct cls_bpf_prog *prog;
327
328 list_for_each_entry(prog, &head->plist, link) {
329 if (prog->handle == handle)
330 return prog;
331 }
332
333 return NULL;
334}
335
336static int cls_bpf_prog_from_ops(struct nlattr **tb, struct cls_bpf_prog *prog)
337{
338 struct sock_filter *bpf_ops;
339 struct sock_fprog_kern fprog_tmp;
340 struct bpf_prog *fp;
341 u16 bpf_size, bpf_num_ops;
342 int ret;
343
344 bpf_num_ops = nla_get_u16(tb[TCA_BPF_OPS_LEN]);
345 if (bpf_num_ops > BPF_MAXINSNS || bpf_num_ops == 0)
346 return -EINVAL;
347
348 bpf_size = bpf_num_ops * sizeof(*bpf_ops);
349 if (bpf_size != nla_len(tb[TCA_BPF_OPS]))
350 return -EINVAL;
351
352 bpf_ops = kmemdup(nla_data(tb[TCA_BPF_OPS]), bpf_size, GFP_KERNEL);
353 if (bpf_ops == NULL)
354 return -ENOMEM;
355
356 fprog_tmp.len = bpf_num_ops;
357 fprog_tmp.filter = bpf_ops;
358
359 ret = bpf_prog_create(&fp, &fprog_tmp);
360 if (ret < 0) {
361 kfree(bpf_ops);
362 return ret;
363 }
364
365 prog->bpf_ops = bpf_ops;
366 prog->bpf_num_ops = bpf_num_ops;
367 prog->bpf_name = NULL;
368 prog->filter = fp;
369
370 return 0;
371}
372
373static int cls_bpf_prog_from_efd(struct nlattr **tb, struct cls_bpf_prog *prog,
374 u32 gen_flags, const struct tcf_proto *tp)
375{
376 struct bpf_prog *fp;
377 char *name = NULL;
378 bool skip_sw;
379 u32 bpf_fd;
380
381 bpf_fd = nla_get_u32(tb[TCA_BPF_FD]);
382 skip_sw = gen_flags & TCA_CLS_FLAGS_SKIP_SW;
383
384 fp = bpf_prog_get_type_dev(bpf_fd, BPF_PROG_TYPE_SCHED_CLS, skip_sw);
385 if (IS_ERR(fp))
386 return PTR_ERR(fp);
387
388 if (tb[TCA_BPF_NAME]) {
389 name = nla_memdup(tb[TCA_BPF_NAME], GFP_KERNEL);
390 if (!name) {
391 bpf_prog_put(fp);
392 return -ENOMEM;
393 }
394 }
395
396 prog->bpf_ops = NULL;
397 prog->bpf_name = name;
398 prog->filter = fp;
399
400 if (fp->dst_needed)
401 tcf_block_netif_keep_dst(tp->chain->block);
402
403 return 0;
404}
405
406static int cls_bpf_set_parms(struct net *net, struct tcf_proto *tp,
407 struct cls_bpf_prog *prog, unsigned long base,
408 struct nlattr **tb, struct nlattr *est, bool ovr,
409 struct netlink_ext_ack *extack)
410{
411 bool is_bpf, is_ebpf, have_exts = false;
412 u32 gen_flags = 0;
413 int ret;
414
415 is_bpf = tb[TCA_BPF_OPS_LEN] && tb[TCA_BPF_OPS];
416 is_ebpf = tb[TCA_BPF_FD];
417 if ((!is_bpf && !is_ebpf) || (is_bpf && is_ebpf))
418 return -EINVAL;
419
420 ret = tcf_exts_validate(net, tp, tb, est, &prog->exts, ovr, extack);
421 if (ret < 0)
422 return ret;
423
424 if (tb[TCA_BPF_FLAGS]) {
425 u32 bpf_flags = nla_get_u32(tb[TCA_BPF_FLAGS]);
426
427 if (bpf_flags & ~TCA_BPF_FLAG_ACT_DIRECT)
428 return -EINVAL;
429
430 have_exts = bpf_flags & TCA_BPF_FLAG_ACT_DIRECT;
431 }
432 if (tb[TCA_BPF_FLAGS_GEN]) {
433 gen_flags = nla_get_u32(tb[TCA_BPF_FLAGS_GEN]);
434 if (gen_flags & ~CLS_BPF_SUPPORTED_GEN_FLAGS ||
435 !tc_flags_valid(gen_flags))
436 return -EINVAL;
437 }
438
439 prog->exts_integrated = have_exts;
440 prog->gen_flags = gen_flags;
441
442 ret = is_bpf ? cls_bpf_prog_from_ops(tb, prog) :
443 cls_bpf_prog_from_efd(tb, prog, gen_flags, tp);
444 if (ret < 0)
445 return ret;
446
447 if (tb[TCA_BPF_CLASSID]) {
448 prog->res.classid = nla_get_u32(tb[TCA_BPF_CLASSID]);
449 tcf_bind_filter(tp, &prog->res, base);
450 }
451
452 return 0;
453}
454
455static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
456 struct tcf_proto *tp, unsigned long base,
457 u32 handle, struct nlattr **tca,
458 void **arg, bool ovr, struct netlink_ext_ack *extack)
459{
460 struct cls_bpf_head *head = rtnl_dereference(tp->root);
461 struct cls_bpf_prog *oldprog = *arg;
462 struct nlattr *tb[TCA_BPF_MAX + 1];
463 struct cls_bpf_prog *prog;
464 int ret;
465
466 if (tca[TCA_OPTIONS] == NULL)
467 return -EINVAL;
468
469 ret = nla_parse_nested(tb, TCA_BPF_MAX, tca[TCA_OPTIONS], bpf_policy,
470 NULL);
471 if (ret < 0)
472 return ret;
473
474 prog = kzalloc(sizeof(*prog), GFP_KERNEL);
475 if (!prog)
476 return -ENOBUFS;
477
478 ret = tcf_exts_init(&prog->exts, TCA_BPF_ACT, TCA_BPF_POLICE);
479 if (ret < 0)
480 goto errout;
481
482 if (oldprog) {
483 if (handle && oldprog->handle != handle) {
484 ret = -EINVAL;
485 goto errout;
486 }
487 }
488
489 if (handle == 0) {
490 handle = 1;
491 ret = idr_alloc_u32(&head->handle_idr, prog, &handle,
492 INT_MAX, GFP_KERNEL);
493 } else if (!oldprog) {
494 ret = idr_alloc_u32(&head->handle_idr, prog, &handle,
495 handle, GFP_KERNEL);
496 }
497
498 if (ret)
499 goto errout;
500 prog->handle = handle;
501
502 ret = cls_bpf_set_parms(net, tp, prog, base, tb, tca[TCA_RATE], ovr,
503 extack);
504 if (ret < 0)
505 goto errout_idr;
506
507 ret = cls_bpf_offload(tp, prog, oldprog, extack);
508 if (ret)
509 goto errout_parms;
510
511 if (!tc_in_hw(prog->gen_flags))
512 prog->gen_flags |= TCA_CLS_FLAGS_NOT_IN_HW;
513
514 if (oldprog) {
515 idr_replace(&head->handle_idr, prog, handle);
516 list_replace_rcu(&oldprog->link, &prog->link);
517 tcf_unbind_filter(tp, &oldprog->res);
518 tcf_exts_get_net(&oldprog->exts);
519 tcf_queue_work(&oldprog->rwork, cls_bpf_delete_prog_work);
520 } else {
521 list_add_rcu(&prog->link, &head->plist);
522 }
523
524 *arg = prog;
525 return 0;
526
527errout_parms:
528 cls_bpf_free_parms(prog);
529errout_idr:
530 if (!oldprog)
531 idr_remove(&head->handle_idr, prog->handle);
532errout:
533 tcf_exts_destroy(&prog->exts);
534 kfree(prog);
535 return ret;
536}
537
538static int cls_bpf_dump_bpf_info(const struct cls_bpf_prog *prog,
539 struct sk_buff *skb)
540{
541 struct nlattr *nla;
542
543 if (nla_put_u16(skb, TCA_BPF_OPS_LEN, prog->bpf_num_ops))
544 return -EMSGSIZE;
545
546 nla = nla_reserve(skb, TCA_BPF_OPS, prog->bpf_num_ops *
547 sizeof(struct sock_filter));
548 if (nla == NULL)
549 return -EMSGSIZE;
550
551 memcpy(nla_data(nla), prog->bpf_ops, nla_len(nla));
552
553 return 0;
554}
555
556static int cls_bpf_dump_ebpf_info(const struct cls_bpf_prog *prog,
557 struct sk_buff *skb)
558{
559 struct nlattr *nla;
560
561 if (prog->bpf_name &&
562 nla_put_string(skb, TCA_BPF_NAME, prog->bpf_name))
563 return -EMSGSIZE;
564
565 if (nla_put_u32(skb, TCA_BPF_ID, prog->filter->aux->id))
566 return -EMSGSIZE;
567
568 nla = nla_reserve(skb, TCA_BPF_TAG, sizeof(prog->filter->tag));
569 if (nla == NULL)
570 return -EMSGSIZE;
571
572 memcpy(nla_data(nla), prog->filter->tag, nla_len(nla));
573
574 return 0;
575}
576
577static int cls_bpf_dump(struct net *net, struct tcf_proto *tp, void *fh,
578 struct sk_buff *skb, struct tcmsg *tm)
579{
580 struct cls_bpf_prog *prog = fh;
581 struct nlattr *nest;
582 u32 bpf_flags = 0;
583 int ret;
584
585 if (prog == NULL)
586 return skb->len;
587
588 tm->tcm_handle = prog->handle;
589
590 cls_bpf_offload_update_stats(tp, prog);
591
592 nest = nla_nest_start(skb, TCA_OPTIONS);
593 if (nest == NULL)
594 goto nla_put_failure;
595
596 if (prog->res.classid &&
597 nla_put_u32(skb, TCA_BPF_CLASSID, prog->res.classid))
598 goto nla_put_failure;
599
600 if (cls_bpf_is_ebpf(prog))
601 ret = cls_bpf_dump_ebpf_info(prog, skb);
602 else
603 ret = cls_bpf_dump_bpf_info(prog, skb);
604 if (ret)
605 goto nla_put_failure;
606
607 if (tcf_exts_dump(skb, &prog->exts) < 0)
608 goto nla_put_failure;
609
610 if (prog->exts_integrated)
611 bpf_flags |= TCA_BPF_FLAG_ACT_DIRECT;
612 if (bpf_flags && nla_put_u32(skb, TCA_BPF_FLAGS, bpf_flags))
613 goto nla_put_failure;
614 if (prog->gen_flags &&
615 nla_put_u32(skb, TCA_BPF_FLAGS_GEN, prog->gen_flags))
616 goto nla_put_failure;
617
618 nla_nest_end(skb, nest);
619
620 if (tcf_exts_dump_stats(skb, &prog->exts) < 0)
621 goto nla_put_failure;
622
623 return skb->len;
624
625nla_put_failure:
626 nla_nest_cancel(skb, nest);
627 return -1;
628}
629
630static void cls_bpf_bind_class(void *fh, u32 classid, unsigned long cl)
631{
632 struct cls_bpf_prog *prog = fh;
633
634 if (prog && prog->res.classid == classid)
635 prog->res.class = cl;
636}
637
638static void cls_bpf_walk(struct tcf_proto *tp, struct tcf_walker *arg)
639{
640 struct cls_bpf_head *head = rtnl_dereference(tp->root);
641 struct cls_bpf_prog *prog;
642
643 list_for_each_entry(prog, &head->plist, link) {
644 if (arg->count < arg->skip)
645 goto skip;
646 if (arg->fn(tp, prog, arg) < 0) {
647 arg->stop = 1;
648 break;
649 }
650skip:
651 arg->count++;
652 }
653}
654
655static int cls_bpf_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
656 void *cb_priv, struct netlink_ext_ack *extack)
657{
658 struct cls_bpf_head *head = rtnl_dereference(tp->root);
659 struct tcf_block *block = tp->chain->block;
660 struct tc_cls_bpf_offload cls_bpf = {};
661 struct cls_bpf_prog *prog;
662 int err;
663
664 list_for_each_entry(prog, &head->plist, link) {
665 if (tc_skip_hw(prog->gen_flags))
666 continue;
667
668 tc_cls_common_offload_init(&cls_bpf.common, tp, prog->gen_flags,
669 extack);
670 cls_bpf.command = TC_CLSBPF_OFFLOAD;
671 cls_bpf.exts = &prog->exts;
672 cls_bpf.prog = add ? prog->filter : NULL;
673 cls_bpf.oldprog = add ? NULL : prog->filter;
674 cls_bpf.name = prog->bpf_name;
675 cls_bpf.exts_integrated = prog->exts_integrated;
676
677 err = cb(TC_SETUP_CLSBPF, &cls_bpf, cb_priv);
678 if (err) {
679 if (add && tc_skip_sw(prog->gen_flags))
680 return err;
681 continue;
682 }
683
684 tc_cls_offload_cnt_update(block, &prog->in_hw_count,
685 &prog->gen_flags, add);
686 }
687
688 return 0;
689}
690
691static struct tcf_proto_ops cls_bpf_ops __read_mostly = {
692 .kind = "bpf",
693 .owner = THIS_MODULE,
694 .classify = cls_bpf_classify,
695 .init = cls_bpf_init,
696 .destroy = cls_bpf_destroy,
697 .get = cls_bpf_get,
698 .change = cls_bpf_change,
699 .delete = cls_bpf_delete,
700 .walk = cls_bpf_walk,
701 .reoffload = cls_bpf_reoffload,
702 .dump = cls_bpf_dump,
703 .bind_class = cls_bpf_bind_class,
704};
705
706static int __init cls_bpf_init_mod(void)
707{
708 return register_tcf_proto_ops(&cls_bpf_ops);
709}
710
711static void __exit cls_bpf_exit_mod(void)
712{
713 unregister_tcf_proto_ops(&cls_bpf_ops);
714}
715
716module_init(cls_bpf_init_mod);
717module_exit(cls_bpf_exit_mod);
718
