[linux-block.git] / net / sched / cls_basic.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * net/sched/cls_basic.c	Basic Packet Classifier.
 *
 * Authors:	Thomas Graf <tgraf@suug.ch>
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <linux/idr.h>
#include <linux/percpu.h>
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>
#include <net/tc_wrapper.h>

struct basic_head {
	struct list_head	flist;
	struct idr		handle_idr;
	struct rcu_head		rcu;
};

struct basic_filter {
	u32			handle;
	struct tcf_exts		exts;
	struct tcf_ematch_tree	ematches;
	struct tcf_result	res;
	struct tcf_proto	*tp;
	struct list_head	link;
	struct tc_basic_pcnt __percpu *pf;
	struct rcu_work		rwork;
};

TC_INDIRECT_SCOPE int basic_classify(struct sk_buff *skb,
				     const struct tcf_proto *tp,
				     struct tcf_result *res)
{
	int r;
	struct basic_head *head = rcu_dereference_bh(tp->root);
	struct basic_filter *f;

	list_for_each_entry_rcu(f, &head->flist, link) {
		__this_cpu_inc(f->pf->rcnt);
		if (!tcf_em_tree_match(skb, &f->ematches, NULL))
			continue;
		__this_cpu_inc(f->pf->rhit);
		*res = f->res;
		r = tcf_exts_exec(skb, &f->exts, res);
		if (r < 0)
			continue;
		return r;
	}
	return -1;
}

static void *basic_get(struct tcf_proto *tp, u32 handle)
{
	struct basic_head *head = rtnl_dereference(tp->root);
	struct basic_filter *f;

	list_for_each_entry(f, &head->flist, link) {
		if (f->handle == handle) {
			return f;
		}
	}

	return NULL;
}

static int basic_init(struct tcf_proto *tp)
{
	struct basic_head *head;

	head = kzalloc(sizeof(*head), GFP_KERNEL);
	if (head == NULL)
		return -ENOBUFS;
	INIT_LIST_HEAD(&head->flist);
	idr_init(&head->handle_idr);
	rcu_assign_pointer(tp->root, head);
	return 0;
}

static void __basic_delete_filter(struct basic_filter *f)
{
	tcf_exts_destroy(&f->exts);
	tcf_em_tree_destroy(&f->ematches);
	tcf_exts_put_net(&f->exts);
	free_percpu(f->pf);
	kfree(f);
}

static void basic_delete_filter_work(struct work_struct *work)
{
	struct basic_filter *f = container_of(to_rcu_work(work),
					      struct basic_filter,
					      rwork);
	rtnl_lock();
	__basic_delete_filter(f);
	rtnl_unlock();
}

static void basic_destroy(struct tcf_proto *tp, bool rtnl_held,
			  struct netlink_ext_ack *extack)
{
	struct basic_head *head = rtnl_dereference(tp->root);
	struct basic_filter *f, *n;

	list_for_each_entry_safe(f, n, &head->flist, link) {
		list_del_rcu(&f->link);
		tcf_unbind_filter(tp, &f->res);
		idr_remove(&head->handle_idr, f->handle);
		if (tcf_exts_get_net(&f->exts))
			tcf_queue_work(&f->rwork, basic_delete_filter_work);
		else
			__basic_delete_filter(f);
	}
	idr_destroy(&head->handle_idr);
	kfree_rcu(head, rcu);
}

static int basic_delete(struct tcf_proto *tp, void *arg, bool *last,
			bool rtnl_held, struct netlink_ext_ack *extack)
{
	struct basic_head *head = rtnl_dereference(tp->root);
	struct basic_filter *f = arg;

	list_del_rcu(&f->link);
	tcf_unbind_filter(tp, &f->res);
	idr_remove(&head->handle_idr, f->handle);
	tcf_exts_get_net(&f->exts);
	tcf_queue_work(&f->rwork, basic_delete_filter_work);
	*last = list_empty(&head->flist);
	return 0;
}

static const struct nla_policy basic_policy[TCA_BASIC_MAX + 1] = {
	[TCA_BASIC_CLASSID]	= { .type = NLA_U32 },
	[TCA_BASIC_EMATCHES]	= { .type = NLA_NESTED },
};

static int basic_set_parms(struct net *net, struct tcf_proto *tp,
			   struct basic_filter *f, unsigned long base,
			   struct nlattr **tb,
			   struct nlattr *est, u32 flags,
			   struct netlink_ext_ack *extack)
{
	int err;

	err = tcf_exts_validate(net, tp, tb, est, &f->exts, flags, extack);
	if (err < 0)
		return err;

	err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &f->ematches);
	if (err < 0)
		return err;

	if (tb[TCA_BASIC_CLASSID]) {
		f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]);
		tcf_bind_filter(tp, &f->res, base);
	}

	f->tp = tp;
	return 0;
}

static int basic_change(struct net *net, struct sk_buff *in_skb,
			struct tcf_proto *tp, unsigned long base, u32 handle,
			struct nlattr **tca, void **arg,
			u32 flags, struct netlink_ext_ack *extack)
{
	int err;
	struct basic_head *head = rtnl_dereference(tp->root);
	struct nlattr *tb[TCA_BASIC_MAX + 1];
	struct basic_filter *fold = (struct basic_filter *) *arg;
	struct basic_filter *fnew;

	if (tca[TCA_OPTIONS] == NULL)
		return -EINVAL;

	err = nla_parse_nested_deprecated(tb, TCA_BASIC_MAX, tca[TCA_OPTIONS],
					  basic_policy, NULL);
	if (err < 0)
		return err;

	if (fold != NULL) {
		if (handle && fold->handle != handle)
			return -EINVAL;
	}

	fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
	if (!fnew)
		return -ENOBUFS;

	err = tcf_exts_init(&fnew->exts, net, TCA_BASIC_ACT, TCA_BASIC_POLICE);
	if (err < 0)
		goto errout;

	if (!handle) {
		handle = 1;
		err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
				    INT_MAX, GFP_KERNEL);
	} else if (!fold) {
		err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
				    handle, GFP_KERNEL);
	}
	if (err)
		goto errout;
	fnew->handle = handle;
	fnew->pf = alloc_percpu(struct tc_basic_pcnt);
	if (!fnew->pf) {
		err = -ENOMEM;
		goto errout;
	}

	err = basic_set_parms(net, tp, fnew, base, tb, tca[TCA_RATE], flags,
			      extack);
	if (err < 0) {
		if (!fold)
			idr_remove(&head->handle_idr, fnew->handle);
		goto errout;
	}

	*arg = fnew;

	if (fold) {
		idr_replace(&head->handle_idr, fnew, fnew->handle);
		list_replace_rcu(&fold->link, &fnew->link);
		tcf_unbind_filter(tp, &fold->res);
		tcf_exts_get_net(&fold->exts);
		tcf_queue_work(&fold->rwork, basic_delete_filter_work);
	} else {
		list_add_rcu(&fnew->link, &head->flist);
	}

	return 0;
errout:
	free_percpu(fnew->pf);
	tcf_exts_destroy(&fnew->exts);
	kfree(fnew);
	return err;
}

static void basic_walk(struct tcf_proto *tp, struct tcf_walker *arg,
		       bool rtnl_held)
{
	struct basic_head *head = rtnl_dereference(tp->root);
	struct basic_filter *f;

	list_for_each_entry(f, &head->flist, link) {
		if (!tc_cls_stats_dump(tp, arg, f))
			break;
	}
}

static void basic_bind_class(void *fh, u32 classid, unsigned long cl, void *q,
			     unsigned long base)
{
	struct basic_filter *f = fh;

	tc_cls_bind_class(classid, cl, q, &f->res, base);
}

static int basic_dump(struct net *net, struct tcf_proto *tp, void *fh,
		      struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
{
	struct tc_basic_pcnt gpf = {};
	struct basic_filter *f = fh;
	struct nlattr *nest;
	int cpu;

	if (f == NULL)
		return skb->len;

	t->tcm_handle = f->handle;

	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
	if (nest == NULL)
		goto nla_put_failure;

	if (f->res.classid &&
	    nla_put_u32(skb, TCA_BASIC_CLASSID, f->res.classid))
		goto nla_put_failure;

	for_each_possible_cpu(cpu) {
		struct tc_basic_pcnt *pf = per_cpu_ptr(f->pf, cpu);

		gpf.rcnt += pf->rcnt;
		gpf.rhit += pf->rhit;
	}

	if (nla_put_64bit(skb, TCA_BASIC_PCNT,
			  sizeof(struct tc_basic_pcnt),
			  &gpf, TCA_BASIC_PAD))
		goto nla_put_failure;

	if (tcf_exts_dump(skb, &f->exts) < 0 ||
	    tcf_em_tree_dump(skb, &f->ematches, TCA_BASIC_EMATCHES) < 0)
		goto nla_put_failure;

	nla_nest_end(skb, nest);

	if (tcf_exts_dump_stats(skb, &f->exts) < 0)
		goto nla_put_failure;

	return skb->len;

nla_put_failure:
	nla_nest_cancel(skb, nest);
	return -1;
}

static struct tcf_proto_ops cls_basic_ops __read_mostly = {
	.kind		=	"basic",
	.classify	=	basic_classify,
	.init		=	basic_init,
	.destroy	=	basic_destroy,
	.get		=	basic_get,
	.change		=	basic_change,
	.delete		=	basic_delete,
	.walk		=	basic_walk,
	.dump		=	basic_dump,
	.bind_class	=	basic_bind_class,
	.owner		=	THIS_MODULE,
};

static int __init init_basic(void)
{
	return register_tcf_proto_ops(&cls_basic_ops);
}

static void __exit exit_basic(void)
{
	unregister_tcf_proto_ops(&cls_basic_ops);
}

module_init(init_basic)
module_exit(exit_basic)
MODULE_LICENSE("GPL");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* net/sched/cls_basic.c Basic Packet Classifier.
	4	*
1da177e4 LT	5	* Authors: Thomas Graf <tgraf@suug.ch>
	6	*/
	7
1da177e4	8	#include <linux/module.h>
5a0e3ad6	9	#include <linux/slab.h>
1da177e4 LT	10	#include <linux/types.h>
1da177e4 LT	11	#include <linux/kernel.h>
1da177e4	12	#include <linux/string.h>
1da177e4 LT	13	#include <linux/errno.h>
	14	#include <linux/rtnetlink.h>
	15	#include <linux/skbuff.h>
1d8134fe	16	#include <linux/idr.h>
5954894b	17	#include <linux/percpu.h>
dc5fc579	18	#include <net/netlink.h>
1da177e4 LT	19	#include <net/act_api.h>
1da177e4 LT	20	#include <net/pkt_cls.h>
9f3101dc	21	#include <net/tc_wrapper.h>
1da177e4	22
cc7ec456	23	struct basic_head {
1da177e4	24	struct list_head flist;
1d8134fe	25	struct idr handle_idr;
9888faef	26	struct rcu_head rcu;
1da177e4 LT	27	};
1da177e4 LT	28
cc7ec456	29	struct basic_filter {
1da177e4 LT	30	u32 handle;
	31	struct tcf_exts exts;
	32	struct tcf_ematch_tree ematches;
	33	struct tcf_result res;
9888faef	34	struct tcf_proto *tp;
1da177e4	35	struct list_head link;
5954894b	36	struct tc_basic_pcnt __percpu *pf;
aaa908ff	37	struct rcu_work rwork;
1da177e4 LT	38	};
1da177e4 LT	39
9f3101dc PT	40	TC_INDIRECT_SCOPE int basic_classify(struct sk_buff *skb,
	41	const struct tcf_proto *tp,
	42	struct tcf_result *res)
1da177e4 LT	43	{
1da177e4 LT	44	int r;
9888faef	45	struct basic_head *head = rcu_dereference_bh(tp->root);
1da177e4 LT	46	struct basic_filter *f;
1da177e4 LT	47
9888faef	48	list_for_each_entry_rcu(f, &head->flist, link) {
5954894b	49	__this_cpu_inc(f->pf->rcnt);
1da177e4 LT	50	if (!tcf_em_tree_match(skb, &f->ematches, NULL))
1da177e4 LT	51	continue;
5954894b	52	__this_cpu_inc(f->pf->rhit);
1da177e4 LT	53	*res = f->res;
	54	r = tcf_exts_exec(skb, &f->exts, res);
	55	if (r < 0)
	56	continue;
	57	return r;
	58	}
	59	return -1;
	60	}
	61
8113c095	62	static void basic_get(struct tcf_proto tp, u32 handle)
1da177e4	63	{
9888faef	64	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4 LT	65	struct basic_filter *f;
1da177e4 LT	66
1c1bc6bd DB	67	list_for_each_entry(f, &head->flist, link) {
1c1bc6bd DB	68	if (f->handle == handle) {
8113c095	69	return f;
1c1bc6bd DB	70	}
1c1bc6bd DB	71	}
1da177e4	72
8113c095	73	return NULL;
1da177e4 LT	74	}
1da177e4 LT	75
1da177e4 LT	76	static int basic_init(struct tcf_proto *tp)
1da177e4 LT	77	{
d3fa76ee PM	78	struct basic_head *head;
	79
	80	head = kzalloc(sizeof(*head), GFP_KERNEL);
	81	if (head == NULL)
	82	return -ENOBUFS;
	83	INIT_LIST_HEAD(&head->flist);
1d8134fe	84	idr_init(&head->handle_idr);
9888faef	85	rcu_assign_pointer(tp->root, head);
1da177e4 LT	86	return 0;
	87	}
	88
0b2a5989 CW	89	static void __basic_delete_filter(struct basic_filter *f)
	90	{
	91	tcf_exts_destroy(&f->exts);
	92	tcf_em_tree_destroy(&f->ematches);
	93	tcf_exts_put_net(&f->exts);
5954894b	94	free_percpu(f->pf);
0b2a5989 CW	95	kfree(f);
	96	}
	97
c96a4838	98	static void basic_delete_filter_work(struct work_struct *work)
1da177e4	99	{
aaa908ff CW	100	struct basic_filter *f = container_of(to_rcu_work(work),
	101	struct basic_filter,
	102	rwork);
c96a4838	103	rtnl_lock();
0b2a5989	104	__basic_delete_filter(f);
c96a4838	105	rtnl_unlock();
1da177e4 LT	106	}
1da177e4 LT	107
12db03b6 VB	108	static void basic_destroy(struct tcf_proto *tp, bool rtnl_held,
12db03b6 VB	109	struct netlink_ext_ack *extack)
1da177e4	110	{
9888faef	111	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4	112	struct basic_filter f, n;
10297b99	113
1da177e4	114	list_for_each_entry_safe(f, n, &head->flist, link) {
9888faef	115	list_del_rcu(&f->link);
18cdb37e	116	tcf_unbind_filter(tp, &f->res);
9c160941	117	idr_remove(&head->handle_idr, f->handle);
0b2a5989	118	if (tcf_exts_get_net(&f->exts))
aaa908ff	119	tcf_queue_work(&f->rwork, basic_delete_filter_work);
0b2a5989 CW	120	else
0b2a5989 CW	121	__basic_delete_filter(f);
1da177e4	122	}
1d8134fe	123	idr_destroy(&head->handle_idr);
9888faef	124	kfree_rcu(head, rcu);
1da177e4 LT	125	}
1da177e4 LT	126
571acf21	127	static int basic_delete(struct tcf_proto tp, void arg, bool *last,
12db03b6	128	bool rtnl_held, struct netlink_ext_ack *extack)
1da177e4	129	{
763dbf63	130	struct basic_head *head = rtnl_dereference(tp->root);
8113c095	131	struct basic_filter *f = arg;
1da177e4	132
e4386456 JP	133	list_del_rcu(&f->link);
e4386456 JP	134	tcf_unbind_filter(tp, &f->res);
9c160941	135	idr_remove(&head->handle_idr, f->handle);
0b2a5989	136	tcf_exts_get_net(&f->exts);
aaa908ff	137	tcf_queue_work(&f->rwork, basic_delete_filter_work);
763dbf63	138	*last = list_empty(&head->flist);
e4386456	139	return 0;
1da177e4 LT	140	}
1da177e4 LT	141
6fa8c014 PM	142	static const struct nla_policy basic_policy[TCA_BASIC_MAX + 1] = {
	143	[TCA_BASIC_CLASSID] = { .type = NLA_U32 },
	144	[TCA_BASIC_EMATCHES] = { .type = NLA_NESTED },
	145	};
	146
c1b52739 BL	147	static int basic_set_parms(struct net net, struct tcf_proto tp,
	148	struct basic_filter *f, unsigned long base,
	149	struct nlattr **tb,
695176bf	150	struct nlattr *est, u32 flags,
50a56190	151	struct netlink_ext_ack *extack)
1da177e4	152	{
6459082a	153	int err;
1da177e4	154
695176bf	155	err = tcf_exts_validate(net, tp, tb, est, &f->exts, flags, extack);
1da177e4 LT	156	if (err < 0)
	157	return err;
	158
4ebc1e3c	159	err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &f->ematches);
1da177e4	160	if (err < 0)
ff1f8ca0	161	return err;
1da177e4	162
add93b61	163	if (tb[TCA_BASIC_CLASSID]) {
1587bac4	164	f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]);
1da177e4 LT	165	tcf_bind_filter(tp, &f->res, base);
	166	}
	167
9888faef	168	f->tp = tp;
1da177e4	169	return 0;
1da177e4 LT	170	}
1da177e4 LT	171
c1b52739	172	static int basic_change(struct net net, struct sk_buff in_skb,
af4c6641	173	struct tcf_proto *tp, unsigned long base, u32 handle,
695176bf CW	174	struct nlattr tca, void arg,
695176bf CW	175	u32 flags, struct netlink_ext_ack *extack)
1da177e4	176	{
cee63723	177	int err;
9888faef	178	struct basic_head *head = rtnl_dereference(tp->root);
add93b61	179	struct nlattr *tb[TCA_BASIC_MAX + 1];
9888faef JF	180	struct basic_filter fold = (struct basic_filter ) *arg;
9888faef JF	181	struct basic_filter *fnew;
1da177e4	182
add93b61	183	if (tca[TCA_OPTIONS] == NULL)
1da177e4 LT	184	return -EINVAL;
1da177e4 LT	185
8cb08174 JB	186	err = nla_parse_nested_deprecated(tb, TCA_BASIC_MAX, tca[TCA_OPTIONS],
8cb08174 JB	187	basic_policy, NULL);
cee63723 PM	188	if (err < 0)
cee63723 PM	189	return err;
1da177e4	190
9888faef JF	191	if (fold != NULL) {
9888faef JF	192	if (handle && fold->handle != handle)
1da177e4	193	return -EINVAL;
1da177e4 LT	194	}
1da177e4 LT	195
9888faef	196	fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
bd42b788 JP	197	if (!fnew)
bd42b788 JP	198	return -ENOBUFS;
1da177e4	199
14215108	200	err = tcf_exts_init(&fnew->exts, net, TCA_BASIC_ACT, TCA_BASIC_POLICE);
b9a24bb7 WC	201	if (err < 0)
	202	goto errout;
	203
05af0ebb MW	204	if (!handle) {
	205	handle = 1;
	206	err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
	207	INT_MAX, GFP_KERNEL);
	208	} else if (!fold) {
	209	err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
	210	handle, GFP_KERNEL);
1da177e4	211	}
05af0ebb MW	212	if (err)
	213	goto errout;
	214	fnew->handle = handle;
5954894b CW	215	fnew->pf = alloc_percpu(struct tc_basic_pcnt);
	216	if (!fnew->pf) {
	217	err = -ENOMEM;
	218	goto errout;
	219	}
1da177e4	220
695176bf	221	err = basic_set_parms(net, tp, fnew, base, tb, tca[TCA_RATE], flags,
50a56190	222	extack);
1d8134fe CW	223	if (err < 0) {
1d8134fe CW	224	if (!fold)
9c160941	225	idr_remove(&head->handle_idr, fnew->handle);
1da177e4	226	goto errout;
1d8134fe	227	}
1da177e4	228
8113c095	229	*arg = fnew;
9888faef JF	230
9888faef JF	231	if (fold) {
234a4624	232	idr_replace(&head->handle_idr, fnew, fnew->handle);
9888faef	233	list_replace_rcu(&fold->link, &fnew->link);
18cdb37e	234	tcf_unbind_filter(tp, &fold->res);
0b2a5989	235	tcf_exts_get_net(&fold->exts);
aaa908ff	236	tcf_queue_work(&fold->rwork, basic_delete_filter_work);
9888faef JF	237	} else {
	238	list_add_rcu(&fnew->link, &head->flist);
	239	}
1da177e4 LT	240
	241	return 0;
	242	errout:
5954894b	243	free_percpu(fnew->pf);
b9a24bb7	244	tcf_exts_destroy(&fnew->exts);
9888faef	245	kfree(fnew);
1da177e4 LT	246	return err;
	247	}
	248
12db03b6 VB	249	static void basic_walk(struct tcf_proto tp, struct tcf_walker arg,
12db03b6 VB	250	bool rtnl_held)
1da177e4	251	{
9888faef	252	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4 LT	253	struct basic_filter *f;
	254
	255	list_for_each_entry(f, &head->flist, link) {
5508ff7c	256	if (!tc_cls_stats_dump(tp, arg, f))
1da177e4	257	break;
1da177e4 LT	258	}
	259	}
	260
2e24cd75 CW	261	static void basic_bind_class(void fh, u32 classid, unsigned long cl, void q,
2e24cd75 CW	262	unsigned long base)
07d79fc7 CW	263	{
	264	struct basic_filter *f = fh;
	265
cc9039a1	266	tc_cls_bind_class(classid, cl, q, &f->res, base);
07d79fc7 CW	267	}
07d79fc7 CW	268
8113c095	269	static int basic_dump(struct net net, struct tcf_proto tp, void *fh,
12db03b6	270	struct sk_buff skb, struct tcmsg t, bool rtnl_held)
1da177e4	271	{
5954894b	272	struct tc_basic_pcnt gpf = {};
8113c095	273	struct basic_filter *f = fh;
4b3550ef	274	struct nlattr *nest;
5954894b	275	int cpu;
1da177e4 LT	276
	277	if (f == NULL)
	278	return skb->len;
	279
	280	t->tcm_handle = f->handle;
	281
ae0be8de	282	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
4b3550ef PM	283	if (nest == NULL)
4b3550ef PM	284	goto nla_put_failure;
1da177e4	285
1b34ec43 DM	286	if (f->res.classid &&
	287	nla_put_u32(skb, TCA_BASIC_CLASSID, f->res.classid))
	288	goto nla_put_failure;
e1e284a4	289
5954894b CW	290	for_each_possible_cpu(cpu) {
	291	struct tc_basic_pcnt *pf = per_cpu_ptr(f->pf, cpu);
	292
	293	gpf.rcnt += pf->rcnt;
	294	gpf.rhit += pf->rhit;
	295	}
	296
	297	if (nla_put_64bit(skb, TCA_BASIC_PCNT,
	298	sizeof(struct tc_basic_pcnt),
	299	&gpf, TCA_BASIC_PAD))
	300	goto nla_put_failure;
	301
5da57f42	302	if (tcf_exts_dump(skb, &f->exts) < 0 \|\|
1da177e4	303	tcf_em_tree_dump(skb, &f->ematches, TCA_BASIC_EMATCHES) < 0)
add93b61	304	goto nla_put_failure;
1da177e4	305
4b3550ef	306	nla_nest_end(skb, nest);
4c46ee52	307
5da57f42	308	if (tcf_exts_dump_stats(skb, &f->exts) < 0)
4c46ee52	309	goto nla_put_failure;
4c46ee52	310
1da177e4 LT	311	return skb->len;
1da177e4 LT	312
add93b61	313	nla_put_failure:
4b3550ef	314	nla_nest_cancel(skb, nest);
1da177e4 LT	315	return -1;
	316	}
	317
2eb9d75c	318	static struct tcf_proto_ops cls_basic_ops __read_mostly = {
1da177e4 LT	319	.kind = "basic",
	320	.classify = basic_classify,
	321	.init = basic_init,
	322	.destroy = basic_destroy,
	323	.get = basic_get,
1da177e4 LT	324	.change = basic_change,
	325	.delete = basic_delete,
	326	.walk = basic_walk,
	327	.dump = basic_dump,
07d79fc7	328	.bind_class = basic_bind_class,
1da177e4 LT	329	.owner = THIS_MODULE,
	330	};
	331
	332	static int __init init_basic(void)
	333	{
	334	return register_tcf_proto_ops(&cls_basic_ops);
	335	}
	336
10297b99	337	static void __exit exit_basic(void)
1da177e4 LT	338	{
	339	unregister_tcf_proto_ops(&cls_basic_ops);
	340	}
	341
	342	module_init(init_basic)
	343	module_exit(exit_basic)
	344	MODULE_LICENSE("GPL");