2 * net/sched/cls_flower.c Flower classifier
4 * Copyright (c) 2015 Jiri Pirko <jiri@resnulli.us>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/rhashtable.h>
16 #include <linux/workqueue.h>
18 #include <linux/if_ether.h>
19 #include <linux/in6.h>
22 #include <net/sch_generic.h>
23 #include <net/pkt_cls.h>
25 #include <net/flow_dissector.h>
29 struct flow_dissector_key_control control;
30 struct flow_dissector_key_basic basic;
31 struct flow_dissector_key_eth_addrs eth;
32 struct flow_dissector_key_addrs ipaddrs;
34 struct flow_dissector_key_ipv4_addrs ipv4;
35 struct flow_dissector_key_ipv6_addrs ipv6;
37 struct flow_dissector_key_ports tp;
38 } __aligned(BITS_PER_LONG / 8); /* Ensure that we can do comparisons as longs. */
40 struct fl_flow_mask_range {
41 unsigned short int start;
42 unsigned short int end;
46 struct fl_flow_key key;
47 struct fl_flow_mask_range range;
53 struct fl_flow_mask mask;
54 struct flow_dissector dissector;
57 struct list_head filters;
58 struct rhashtable_params ht_params;
60 struct work_struct work;
65 struct cls_fl_filter {
66 struct rhash_head ht_node;
67 struct fl_flow_key mkey;
69 struct tcf_result res;
70 struct fl_flow_key key;
71 struct list_head list;
76 static unsigned short int fl_mask_range(const struct fl_flow_mask *mask)
78 return mask->range.end - mask->range.start;
81 static void fl_mask_update_range(struct fl_flow_mask *mask)
83 const u8 *bytes = (const u8 *) &mask->key;
84 size_t size = sizeof(mask->key);
85 size_t i, first = 0, last = size - 1;
87 for (i = 0; i < sizeof(mask->key); i++) {
94 mask->range.start = rounddown(first, sizeof(long));
95 mask->range.end = roundup(last + 1, sizeof(long));
98 static void *fl_key_get_start(struct fl_flow_key *key,
99 const struct fl_flow_mask *mask)
101 return (u8 *) key + mask->range.start;
104 static void fl_set_masked_key(struct fl_flow_key *mkey, struct fl_flow_key *key,
105 struct fl_flow_mask *mask)
107 const long *lkey = fl_key_get_start(key, mask);
108 const long *lmask = fl_key_get_start(&mask->key, mask);
109 long *lmkey = fl_key_get_start(mkey, mask);
112 for (i = 0; i < fl_mask_range(mask); i += sizeof(long))
113 *lmkey++ = *lkey++ & *lmask++;
116 static void fl_clear_masked_range(struct fl_flow_key *key,
117 struct fl_flow_mask *mask)
119 memset(fl_key_get_start(key, mask), 0, fl_mask_range(mask));
122 static int fl_classify(struct sk_buff *skb, const struct tcf_proto *tp,
123 struct tcf_result *res)
125 struct cls_fl_head *head = rcu_dereference_bh(tp->root);
126 struct cls_fl_filter *f;
127 struct fl_flow_key skb_key;
128 struct fl_flow_key skb_mkey;
130 flow_dissector_init_keys(&skb_key.control, &skb_key.basic);
131 fl_clear_masked_range(&skb_key, &head->mask);
132 skb_key.indev_ifindex = skb->skb_iif;
133 /* skb_flow_dissect() does not set n_proto in case an unknown protocol,
134 * so do it rather here.
136 skb_key.basic.n_proto = skb->protocol;
137 skb_flow_dissect(skb, &head->dissector, &skb_key, 0);
139 fl_set_masked_key(&skb_mkey, &skb_key, &head->mask);
141 f = rhashtable_lookup_fast(&head->ht,
142 fl_key_get_start(&skb_mkey, &head->mask),
146 return tcf_exts_exec(skb, &f->exts, res);
151 static int fl_init(struct tcf_proto *tp)
153 struct cls_fl_head *head;
155 head = kzalloc(sizeof(*head), GFP_KERNEL);
159 INIT_LIST_HEAD_RCU(&head->filters);
160 rcu_assign_pointer(tp->root, head);
165 static void fl_destroy_filter(struct rcu_head *head)
167 struct cls_fl_filter *f = container_of(head, struct cls_fl_filter, rcu);
169 tcf_exts_destroy(&f->exts);
173 static void fl_destroy_sleepable(struct work_struct *work)
175 struct cls_fl_head *head = container_of(work, struct cls_fl_head,
177 if (head->mask_assigned)
178 rhashtable_destroy(&head->ht);
180 module_put(THIS_MODULE);
183 static void fl_destroy_rcu(struct rcu_head *rcu)
185 struct cls_fl_head *head = container_of(rcu, struct cls_fl_head, rcu);
187 INIT_WORK(&head->work, fl_destroy_sleepable);
188 schedule_work(&head->work);
191 static bool fl_destroy(struct tcf_proto *tp, bool force)
193 struct cls_fl_head *head = rtnl_dereference(tp->root);
194 struct cls_fl_filter *f, *next;
196 if (!force && !list_empty(&head->filters))
199 list_for_each_entry_safe(f, next, &head->filters, list) {
200 list_del_rcu(&f->list);
201 call_rcu(&f->rcu, fl_destroy_filter);
204 __module_get(THIS_MODULE);
205 call_rcu(&head->rcu, fl_destroy_rcu);
209 static unsigned long fl_get(struct tcf_proto *tp, u32 handle)
211 struct cls_fl_head *head = rtnl_dereference(tp->root);
212 struct cls_fl_filter *f;
214 list_for_each_entry(f, &head->filters, list)
215 if (f->handle == handle)
216 return (unsigned long) f;
220 static const struct nla_policy fl_policy[TCA_FLOWER_MAX + 1] = {
221 [TCA_FLOWER_UNSPEC] = { .type = NLA_UNSPEC },
222 [TCA_FLOWER_CLASSID] = { .type = NLA_U32 },
223 [TCA_FLOWER_INDEV] = { .type = NLA_STRING,
225 [TCA_FLOWER_KEY_ETH_DST] = { .len = ETH_ALEN },
226 [TCA_FLOWER_KEY_ETH_DST_MASK] = { .len = ETH_ALEN },
227 [TCA_FLOWER_KEY_ETH_SRC] = { .len = ETH_ALEN },
228 [TCA_FLOWER_KEY_ETH_SRC_MASK] = { .len = ETH_ALEN },
229 [TCA_FLOWER_KEY_ETH_TYPE] = { .type = NLA_U16 },
230 [TCA_FLOWER_KEY_IP_PROTO] = { .type = NLA_U8 },
231 [TCA_FLOWER_KEY_IPV4_SRC] = { .type = NLA_U32 },
232 [TCA_FLOWER_KEY_IPV4_SRC_MASK] = { .type = NLA_U32 },
233 [TCA_FLOWER_KEY_IPV4_DST] = { .type = NLA_U32 },
234 [TCA_FLOWER_KEY_IPV4_DST_MASK] = { .type = NLA_U32 },
235 [TCA_FLOWER_KEY_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
236 [TCA_FLOWER_KEY_IPV6_SRC_MASK] = { .len = sizeof(struct in6_addr) },
237 [TCA_FLOWER_KEY_IPV6_DST] = { .len = sizeof(struct in6_addr) },
238 [TCA_FLOWER_KEY_IPV6_DST_MASK] = { .len = sizeof(struct in6_addr) },
239 [TCA_FLOWER_KEY_TCP_SRC] = { .type = NLA_U16 },
240 [TCA_FLOWER_KEY_TCP_DST] = { .type = NLA_U16 },
241 [TCA_FLOWER_KEY_UDP_SRC] = { .type = NLA_U16 },
242 [TCA_FLOWER_KEY_UDP_DST] = { .type = NLA_U16 },
245 static void fl_set_key_val(struct nlattr **tb,
246 void *val, int val_type,
247 void *mask, int mask_type, int len)
251 memcpy(val, nla_data(tb[val_type]), len);
252 if (mask_type == TCA_FLOWER_UNSPEC || !tb[mask_type])
253 memset(mask, 0xff, len);
255 memcpy(mask, nla_data(tb[mask_type]), len);
258 static int fl_set_key(struct net *net, struct nlattr **tb,
259 struct fl_flow_key *key, struct fl_flow_key *mask)
261 #ifdef CONFIG_NET_CLS_IND
262 if (tb[TCA_FLOWER_INDEV]) {
263 int err = tcf_change_indev(net, tb[TCA_FLOWER_INDEV]);
266 key->indev_ifindex = err;
267 mask->indev_ifindex = 0xffffffff;
271 fl_set_key_val(tb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
272 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
273 sizeof(key->eth.dst));
274 fl_set_key_val(tb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
275 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
276 sizeof(key->eth.src));
278 fl_set_key_val(tb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
279 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
280 sizeof(key->basic.n_proto));
282 if (key->basic.n_proto == htons(ETH_P_IP) ||
283 key->basic.n_proto == htons(ETH_P_IPV6)) {
284 fl_set_key_val(tb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
285 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
286 sizeof(key->basic.ip_proto));
289 if (tb[TCA_FLOWER_KEY_IPV4_SRC] || tb[TCA_FLOWER_KEY_IPV4_DST]) {
290 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
291 fl_set_key_val(tb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
292 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
293 sizeof(key->ipv4.src));
294 fl_set_key_val(tb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
295 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
296 sizeof(key->ipv4.dst));
297 } else if (tb[TCA_FLOWER_KEY_IPV6_SRC] || tb[TCA_FLOWER_KEY_IPV6_DST]) {
298 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
299 fl_set_key_val(tb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
300 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
301 sizeof(key->ipv6.src));
302 fl_set_key_val(tb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
303 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
304 sizeof(key->ipv6.dst));
307 if (key->basic.ip_proto == IPPROTO_TCP) {
308 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
309 &mask->tp.src, TCA_FLOWER_UNSPEC,
310 sizeof(key->tp.src));
311 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
312 &mask->tp.dst, TCA_FLOWER_UNSPEC,
313 sizeof(key->tp.dst));
314 } else if (key->basic.ip_proto == IPPROTO_UDP) {
315 fl_set_key_val(tb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
316 &mask->tp.src, TCA_FLOWER_UNSPEC,
317 sizeof(key->tp.src));
318 fl_set_key_val(tb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
319 &mask->tp.dst, TCA_FLOWER_UNSPEC,
320 sizeof(key->tp.dst));
326 static bool fl_mask_eq(struct fl_flow_mask *mask1,
327 struct fl_flow_mask *mask2)
329 const long *lmask1 = fl_key_get_start(&mask1->key, mask1);
330 const long *lmask2 = fl_key_get_start(&mask2->key, mask2);
332 return !memcmp(&mask1->range, &mask2->range, sizeof(mask1->range)) &&
333 !memcmp(lmask1, lmask2, fl_mask_range(mask1));
336 static const struct rhashtable_params fl_ht_params = {
337 .key_offset = offsetof(struct cls_fl_filter, mkey), /* base offset */
338 .head_offset = offsetof(struct cls_fl_filter, ht_node),
339 .automatic_shrinking = true,
342 static int fl_init_hashtable(struct cls_fl_head *head,
343 struct fl_flow_mask *mask)
345 head->ht_params = fl_ht_params;
346 head->ht_params.key_len = fl_mask_range(mask);
347 head->ht_params.key_offset += mask->range.start;
349 return rhashtable_init(&head->ht, &head->ht_params);
352 #define FL_KEY_MEMBER_OFFSET(member) offsetof(struct fl_flow_key, member)
353 #define FL_KEY_MEMBER_SIZE(member) (sizeof(((struct fl_flow_key *) 0)->member))
355 #define FL_KEY_IS_MASKED(mask, member) \
356 memchr_inv(((char *)mask) + FL_KEY_MEMBER_OFFSET(member), \
357 0, FL_KEY_MEMBER_SIZE(member)) \
359 #define FL_KEY_SET(keys, cnt, id, member) \
361 keys[cnt].key_id = id; \
362 keys[cnt].offset = FL_KEY_MEMBER_OFFSET(member); \
366 #define FL_KEY_SET_IF_MASKED(mask, keys, cnt, id, member) \
368 if (FL_KEY_IS_MASKED(mask, member)) \
369 FL_KEY_SET(keys, cnt, id, member); \
372 static void fl_init_dissector(struct cls_fl_head *head,
373 struct fl_flow_mask *mask)
375 struct flow_dissector_key keys[FLOW_DISSECTOR_KEY_MAX];
378 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_CONTROL, control);
379 FL_KEY_SET(keys, cnt, FLOW_DISSECTOR_KEY_BASIC, basic);
380 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
381 FLOW_DISSECTOR_KEY_ETH_ADDRS, eth);
382 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
383 FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
384 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
385 FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
386 FL_KEY_SET_IF_MASKED(&mask->key, keys, cnt,
387 FLOW_DISSECTOR_KEY_PORTS, tp);
389 skb_flow_dissector_init(&head->dissector, keys, cnt);
392 static int fl_check_assign_mask(struct cls_fl_head *head,
393 struct fl_flow_mask *mask)
397 if (head->mask_assigned) {
398 if (!fl_mask_eq(&head->mask, mask))
404 /* Mask is not assigned yet. So assign it and init hashtable
407 err = fl_init_hashtable(head, mask);
410 memcpy(&head->mask, mask, sizeof(head->mask));
411 head->mask_assigned = true;
413 fl_init_dissector(head, mask);
418 static int fl_set_parms(struct net *net, struct tcf_proto *tp,
419 struct cls_fl_filter *f, struct fl_flow_mask *mask,
420 unsigned long base, struct nlattr **tb,
421 struct nlattr *est, bool ovr)
426 tcf_exts_init(&e, TCA_FLOWER_ACT, 0);
427 err = tcf_exts_validate(net, tp, tb, est, &e, ovr);
431 if (tb[TCA_FLOWER_CLASSID]) {
432 f->res.classid = nla_get_u32(tb[TCA_FLOWER_CLASSID]);
433 tcf_bind_filter(tp, &f->res, base);
436 err = fl_set_key(net, tb, &f->key, &mask->key);
440 fl_mask_update_range(mask);
441 fl_set_masked_key(&f->mkey, &f->key, mask);
443 tcf_exts_change(tp, &f->exts, &e);
447 tcf_exts_destroy(&e);
451 static u32 fl_grab_new_handle(struct tcf_proto *tp,
452 struct cls_fl_head *head)
454 unsigned int i = 0x80000000;
458 if (++head->hgen == 0x7FFFFFFF)
460 } while (--i > 0 && fl_get(tp, head->hgen));
462 if (unlikely(i == 0)) {
463 pr_err("Insufficient number of handles\n");
472 static int fl_change(struct net *net, struct sk_buff *in_skb,
473 struct tcf_proto *tp, unsigned long base,
474 u32 handle, struct nlattr **tca,
475 unsigned long *arg, bool ovr)
477 struct cls_fl_head *head = rtnl_dereference(tp->root);
478 struct cls_fl_filter *fold = (struct cls_fl_filter *) *arg;
479 struct cls_fl_filter *fnew;
480 struct nlattr *tb[TCA_FLOWER_MAX + 1];
481 struct fl_flow_mask mask = {};
484 if (!tca[TCA_OPTIONS])
487 err = nla_parse_nested(tb, TCA_FLOWER_MAX, tca[TCA_OPTIONS], fl_policy);
491 if (fold && handle && fold->handle != handle)
494 fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
498 tcf_exts_init(&fnew->exts, TCA_FLOWER_ACT, 0);
501 handle = fl_grab_new_handle(tp, head);
507 fnew->handle = handle;
509 err = fl_set_parms(net, tp, fnew, &mask, base, tb, tca[TCA_RATE], ovr);
513 err = fl_check_assign_mask(head, &mask);
517 err = rhashtable_insert_fast(&head->ht, &fnew->ht_node,
522 rhashtable_remove_fast(&head->ht, &fold->ht_node,
525 *arg = (unsigned long) fnew;
528 list_replace_rcu(&fold->list, &fnew->list);
529 tcf_unbind_filter(tp, &fold->res);
530 call_rcu(&fold->rcu, fl_destroy_filter);
532 list_add_tail_rcu(&fnew->list, &head->filters);
542 static int fl_delete(struct tcf_proto *tp, unsigned long arg)
544 struct cls_fl_head *head = rtnl_dereference(tp->root);
545 struct cls_fl_filter *f = (struct cls_fl_filter *) arg;
547 rhashtable_remove_fast(&head->ht, &f->ht_node,
549 list_del_rcu(&f->list);
550 tcf_unbind_filter(tp, &f->res);
551 call_rcu(&f->rcu, fl_destroy_filter);
555 static void fl_walk(struct tcf_proto *tp, struct tcf_walker *arg)
557 struct cls_fl_head *head = rtnl_dereference(tp->root);
558 struct cls_fl_filter *f;
560 list_for_each_entry_rcu(f, &head->filters, list) {
561 if (arg->count < arg->skip)
563 if (arg->fn(tp, (unsigned long) f, arg) < 0) {
572 static int fl_dump_key_val(struct sk_buff *skb,
573 void *val, int val_type,
574 void *mask, int mask_type, int len)
578 if (!memchr_inv(mask, 0, len))
580 err = nla_put(skb, val_type, len, val);
583 if (mask_type != TCA_FLOWER_UNSPEC) {
584 err = nla_put(skb, mask_type, len, mask);
591 static int fl_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
592 struct sk_buff *skb, struct tcmsg *t)
594 struct cls_fl_head *head = rtnl_dereference(tp->root);
595 struct cls_fl_filter *f = (struct cls_fl_filter *) fh;
597 struct fl_flow_key *key, *mask;
602 t->tcm_handle = f->handle;
604 nest = nla_nest_start(skb, TCA_OPTIONS);
606 goto nla_put_failure;
608 if (f->res.classid &&
609 nla_put_u32(skb, TCA_FLOWER_CLASSID, f->res.classid))
610 goto nla_put_failure;
613 mask = &head->mask.key;
615 if (mask->indev_ifindex) {
616 struct net_device *dev;
618 dev = __dev_get_by_index(net, key->indev_ifindex);
619 if (dev && nla_put_string(skb, TCA_FLOWER_INDEV, dev->name))
620 goto nla_put_failure;
623 if (fl_dump_key_val(skb, key->eth.dst, TCA_FLOWER_KEY_ETH_DST,
624 mask->eth.dst, TCA_FLOWER_KEY_ETH_DST_MASK,
625 sizeof(key->eth.dst)) ||
626 fl_dump_key_val(skb, key->eth.src, TCA_FLOWER_KEY_ETH_SRC,
627 mask->eth.src, TCA_FLOWER_KEY_ETH_SRC_MASK,
628 sizeof(key->eth.src)) ||
629 fl_dump_key_val(skb, &key->basic.n_proto, TCA_FLOWER_KEY_ETH_TYPE,
630 &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
631 sizeof(key->basic.n_proto)))
632 goto nla_put_failure;
633 if ((key->basic.n_proto == htons(ETH_P_IP) ||
634 key->basic.n_proto == htons(ETH_P_IPV6)) &&
635 fl_dump_key_val(skb, &key->basic.ip_proto, TCA_FLOWER_KEY_IP_PROTO,
636 &mask->basic.ip_proto, TCA_FLOWER_UNSPEC,
637 sizeof(key->basic.ip_proto)))
638 goto nla_put_failure;
640 if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS &&
641 (fl_dump_key_val(skb, &key->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC,
642 &mask->ipv4.src, TCA_FLOWER_KEY_IPV4_SRC_MASK,
643 sizeof(key->ipv4.src)) ||
644 fl_dump_key_val(skb, &key->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST,
645 &mask->ipv4.dst, TCA_FLOWER_KEY_IPV4_DST_MASK,
646 sizeof(key->ipv4.dst))))
647 goto nla_put_failure;
648 else if (key->control.addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS &&
649 (fl_dump_key_val(skb, &key->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC,
650 &mask->ipv6.src, TCA_FLOWER_KEY_IPV6_SRC_MASK,
651 sizeof(key->ipv6.src)) ||
652 fl_dump_key_val(skb, &key->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST,
653 &mask->ipv6.dst, TCA_FLOWER_KEY_IPV6_DST_MASK,
654 sizeof(key->ipv6.dst))))
655 goto nla_put_failure;
657 if (key->basic.ip_proto == IPPROTO_TCP &&
658 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_TCP_SRC,
659 &mask->tp.src, TCA_FLOWER_UNSPEC,
660 sizeof(key->tp.src)) ||
661 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_TCP_DST,
662 &mask->tp.dst, TCA_FLOWER_UNSPEC,
663 sizeof(key->tp.dst))))
664 goto nla_put_failure;
665 else if (key->basic.ip_proto == IPPROTO_UDP &&
666 (fl_dump_key_val(skb, &key->tp.src, TCA_FLOWER_KEY_UDP_SRC,
667 &mask->tp.src, TCA_FLOWER_UNSPEC,
668 sizeof(key->tp.src)) ||
669 fl_dump_key_val(skb, &key->tp.dst, TCA_FLOWER_KEY_UDP_DST,
670 &mask->tp.dst, TCA_FLOWER_UNSPEC,
671 sizeof(key->tp.dst))))
672 goto nla_put_failure;
674 if (tcf_exts_dump(skb, &f->exts))
675 goto nla_put_failure;
677 nla_nest_end(skb, nest);
679 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
680 goto nla_put_failure;
685 nla_nest_cancel(skb, nest);
689 static struct tcf_proto_ops cls_fl_ops __read_mostly = {
691 .classify = fl_classify,
693 .destroy = fl_destroy,
699 .owner = THIS_MODULE,
702 static int __init cls_fl_init(void)
704 return register_tcf_proto_ops(&cls_fl_ops);
707 static void __exit cls_fl_exit(void)
709 unregister_tcf_proto_ops(&cls_fl_ops);
712 module_init(cls_fl_init);
713 module_exit(cls_fl_exit);
715 MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
716 MODULE_DESCRIPTION("Flower classifier");
717 MODULE_LICENSE("GPL v2");