[mirror_ubuntu-jammy-kernel.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>

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;
};

static 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, bool ovr,
			   struct netlink_ext_ack *extack)
{
	int err;

	err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, true, 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, bool ovr,
			bool rtnl_held, 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], ovr,
			      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 (arg->count < arg->skip)
			goto skip;

		if (arg->fn(tp, f, arg) < 0) {
			arg->stop = 1;
			break;
		}
skip:
		arg->count++;
	}
}

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

	if (f && f->res.classid == classid)
		f->res.class = cl;
}

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>
	20	#include <net/pkt_cls.h>
	21
cc7ec456	22	struct basic_head {
1da177e4	23	struct list_head flist;
1d8134fe	24	struct idr handle_idr;
9888faef	25	struct rcu_head rcu;
1da177e4 LT	26	};
1da177e4 LT	27
cc7ec456	28	struct basic_filter {
1da177e4 LT	29	u32 handle;
	30	struct tcf_exts exts;
	31	struct tcf_ematch_tree ematches;
	32	struct tcf_result res;
9888faef	33	struct tcf_proto *tp;
1da177e4	34	struct list_head link;
5954894b	35	struct tc_basic_pcnt __percpu *pf;
aaa908ff	36	struct rcu_work rwork;
1da177e4 LT	37	};
1da177e4 LT	38
dc7f9f6e	39	static int basic_classify(struct sk_buff skb, const struct tcf_proto tp,
1da177e4 LT	40	struct tcf_result *res)
	41	{
	42	int r;
9888faef	43	struct basic_head *head = rcu_dereference_bh(tp->root);
1da177e4 LT	44	struct basic_filter *f;
1da177e4 LT	45
9888faef	46	list_for_each_entry_rcu(f, &head->flist, link) {
5954894b	47	__this_cpu_inc(f->pf->rcnt);
1da177e4 LT	48	if (!tcf_em_tree_match(skb, &f->ematches, NULL))
1da177e4 LT	49	continue;
5954894b	50	__this_cpu_inc(f->pf->rhit);
1da177e4 LT	51	*res = f->res;
	52	r = tcf_exts_exec(skb, &f->exts, res);
	53	if (r < 0)
	54	continue;
	55	return r;
	56	}
	57	return -1;
	58	}
	59
8113c095	60	static void basic_get(struct tcf_proto tp, u32 handle)
1da177e4	61	{
9888faef	62	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4 LT	63	struct basic_filter *f;
1da177e4 LT	64
1c1bc6bd DB	65	list_for_each_entry(f, &head->flist, link) {
1c1bc6bd DB	66	if (f->handle == handle) {
8113c095	67	return f;
1c1bc6bd DB	68	}
1c1bc6bd DB	69	}
1da177e4	70
8113c095	71	return NULL;
1da177e4 LT	72	}
1da177e4 LT	73
1da177e4 LT	74	static int basic_init(struct tcf_proto *tp)
1da177e4 LT	75	{
d3fa76ee PM	76	struct basic_head *head;
	77
	78	head = kzalloc(sizeof(*head), GFP_KERNEL);
	79	if (head == NULL)
	80	return -ENOBUFS;
	81	INIT_LIST_HEAD(&head->flist);
1d8134fe	82	idr_init(&head->handle_idr);
9888faef	83	rcu_assign_pointer(tp->root, head);
1da177e4 LT	84	return 0;
	85	}
	86
0b2a5989 CW	87	static void __basic_delete_filter(struct basic_filter *f)
	88	{
	89	tcf_exts_destroy(&f->exts);
	90	tcf_em_tree_destroy(&f->ematches);
	91	tcf_exts_put_net(&f->exts);
5954894b	92	free_percpu(f->pf);
0b2a5989 CW	93	kfree(f);
	94	}
	95
c96a4838	96	static void basic_delete_filter_work(struct work_struct *work)
1da177e4	97	{
aaa908ff CW	98	struct basic_filter *f = container_of(to_rcu_work(work),
	99	struct basic_filter,
	100	rwork);
c96a4838	101	rtnl_lock();
0b2a5989	102	__basic_delete_filter(f);
c96a4838	103	rtnl_unlock();
1da177e4 LT	104	}
1da177e4 LT	105
12db03b6 VB	106	static void basic_destroy(struct tcf_proto *tp, bool rtnl_held,
12db03b6 VB	107	struct netlink_ext_ack *extack)
1da177e4	108	{
9888faef	109	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4	110	struct basic_filter f, n;
10297b99	111
1da177e4	112	list_for_each_entry_safe(f, n, &head->flist, link) {
9888faef	113	list_del_rcu(&f->link);
18cdb37e	114	tcf_unbind_filter(tp, &f->res);
9c160941	115	idr_remove(&head->handle_idr, f->handle);
0b2a5989	116	if (tcf_exts_get_net(&f->exts))
aaa908ff	117	tcf_queue_work(&f->rwork, basic_delete_filter_work);
0b2a5989 CW	118	else
0b2a5989 CW	119	__basic_delete_filter(f);
1da177e4	120	}
1d8134fe	121	idr_destroy(&head->handle_idr);
9888faef	122	kfree_rcu(head, rcu);
1da177e4 LT	123	}
1da177e4 LT	124
571acf21	125	static int basic_delete(struct tcf_proto tp, void arg, bool *last,
12db03b6	126	bool rtnl_held, struct netlink_ext_ack *extack)
1da177e4	127	{
763dbf63	128	struct basic_head *head = rtnl_dereference(tp->root);
8113c095	129	struct basic_filter *f = arg;
1da177e4	130
e4386456 JP	131	list_del_rcu(&f->link);
e4386456 JP	132	tcf_unbind_filter(tp, &f->res);
9c160941	133	idr_remove(&head->handle_idr, f->handle);
0b2a5989	134	tcf_exts_get_net(&f->exts);
aaa908ff	135	tcf_queue_work(&f->rwork, basic_delete_filter_work);
763dbf63	136	*last = list_empty(&head->flist);
e4386456	137	return 0;
1da177e4 LT	138	}
1da177e4 LT	139
6fa8c014 PM	140	static const struct nla_policy basic_policy[TCA_BASIC_MAX + 1] = {
	141	[TCA_BASIC_CLASSID] = { .type = NLA_U32 },
	142	[TCA_BASIC_EMATCHES] = { .type = NLA_NESTED },
	143	};
	144
c1b52739 BL	145	static int basic_set_parms(struct net net, struct tcf_proto tp,
	146	struct basic_filter *f, unsigned long base,
	147	struct nlattr **tb,
50a56190 AA	148	struct nlattr *est, bool ovr,
50a56190 AA	149	struct netlink_ext_ack *extack)
1da177e4	150	{
6459082a	151	int err;
1da177e4	152
ec6743a1	153	err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, true, extack);
1da177e4 LT	154	if (err < 0)
	155	return err;
	156
4ebc1e3c	157	err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &f->ematches);
1da177e4	158	if (err < 0)
ff1f8ca0	159	return err;
1da177e4	160
add93b61	161	if (tb[TCA_BASIC_CLASSID]) {
1587bac4	162	f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]);
1da177e4 LT	163	tcf_bind_filter(tp, &f->res, base);
	164	}
	165
9888faef	166	f->tp = tp;
1da177e4	167	return 0;
1da177e4 LT	168	}
1da177e4 LT	169
c1b52739	170	static int basic_change(struct net net, struct sk_buff in_skb,
af4c6641	171	struct tcf_proto *tp, unsigned long base, u32 handle,
7306db38	172	struct nlattr tca, void arg, bool ovr,
12db03b6	173	bool rtnl_held, struct netlink_ext_ack *extack)
1da177e4	174	{
cee63723	175	int err;
9888faef	176	struct basic_head *head = rtnl_dereference(tp->root);
add93b61	177	struct nlattr *tb[TCA_BASIC_MAX + 1];
9888faef JF	178	struct basic_filter fold = (struct basic_filter ) *arg;
9888faef JF	179	struct basic_filter *fnew;
1da177e4	180
add93b61	181	if (tca[TCA_OPTIONS] == NULL)
1da177e4 LT	182	return -EINVAL;
1da177e4 LT	183
8cb08174 JB	184	err = nla_parse_nested_deprecated(tb, TCA_BASIC_MAX, tca[TCA_OPTIONS],
8cb08174 JB	185	basic_policy, NULL);
cee63723 PM	186	if (err < 0)
cee63723 PM	187	return err;
1da177e4	188
9888faef JF	189	if (fold != NULL) {
9888faef JF	190	if (handle && fold->handle != handle)
1da177e4	191	return -EINVAL;
1da177e4 LT	192	}
1da177e4 LT	193
9888faef	194	fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
bd42b788 JP	195	if (!fnew)
bd42b788 JP	196	return -ENOBUFS;
1da177e4	197
14215108	198	err = tcf_exts_init(&fnew->exts, net, TCA_BASIC_ACT, TCA_BASIC_POLICE);
b9a24bb7 WC	199	if (err < 0)
	200	goto errout;
	201
05af0ebb MW	202	if (!handle) {
	203	handle = 1;
	204	err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
	205	INT_MAX, GFP_KERNEL);
	206	} else if (!fold) {
	207	err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
	208	handle, GFP_KERNEL);
1da177e4	209	}
05af0ebb MW	210	if (err)
	211	goto errout;
	212	fnew->handle = handle;
5954894b CW	213	fnew->pf = alloc_percpu(struct tc_basic_pcnt);
	214	if (!fnew->pf) {
	215	err = -ENOMEM;
	216	goto errout;
	217	}
1da177e4	218
50a56190 AA	219	err = basic_set_parms(net, tp, fnew, base, tb, tca[TCA_RATE], ovr,
50a56190 AA	220	extack);
1d8134fe CW	221	if (err < 0) {
1d8134fe CW	222	if (!fold)
9c160941	223	idr_remove(&head->handle_idr, fnew->handle);
1da177e4	224	goto errout;
1d8134fe	225	}
1da177e4	226
8113c095	227	*arg = fnew;
9888faef JF	228
9888faef JF	229	if (fold) {
234a4624	230	idr_replace(&head->handle_idr, fnew, fnew->handle);
9888faef	231	list_replace_rcu(&fold->link, &fnew->link);
18cdb37e	232	tcf_unbind_filter(tp, &fold->res);
0b2a5989	233	tcf_exts_get_net(&fold->exts);
aaa908ff	234	tcf_queue_work(&fold->rwork, basic_delete_filter_work);
9888faef JF	235	} else {
	236	list_add_rcu(&fnew->link, &head->flist);
	237	}
1da177e4 LT	238
	239	return 0;
	240	errout:
5954894b	241	free_percpu(fnew->pf);
b9a24bb7	242	tcf_exts_destroy(&fnew->exts);
9888faef	243	kfree(fnew);
1da177e4 LT	244	return err;
	245	}
	246
12db03b6 VB	247	static void basic_walk(struct tcf_proto tp, struct tcf_walker arg,
12db03b6 VB	248	bool rtnl_held)
1da177e4	249	{
9888faef	250	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4 LT	251	struct basic_filter *f;
	252
	253	list_for_each_entry(f, &head->flist, link) {
	254	if (arg->count < arg->skip)
	255	goto skip;
	256
8113c095	257	if (arg->fn(tp, f, arg) < 0) {
1da177e4 LT	258	arg->stop = 1;
	259	break;
	260	}
	261	skip:
	262	arg->count++;
	263	}
	264	}
	265
07d79fc7 CW	266	static void basic_bind_class(void *fh, u32 classid, unsigned long cl)
	267	{
	268	struct basic_filter *f = fh;
	269
	270	if (f && f->res.classid == classid)
	271	f->res.class = cl;
	272	}
	273
8113c095	274	static int basic_dump(struct net net, struct tcf_proto tp, void *fh,
12db03b6	275	struct sk_buff skb, struct tcmsg t, bool rtnl_held)
1da177e4	276	{
5954894b	277	struct tc_basic_pcnt gpf = {};
8113c095	278	struct basic_filter *f = fh;
4b3550ef	279	struct nlattr *nest;
5954894b	280	int cpu;
1da177e4 LT	281
	282	if (f == NULL)
	283	return skb->len;
	284
	285	t->tcm_handle = f->handle;
	286
ae0be8de	287	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
4b3550ef PM	288	if (nest == NULL)
4b3550ef PM	289	goto nla_put_failure;
1da177e4	290
1b34ec43 DM	291	if (f->res.classid &&
	292	nla_put_u32(skb, TCA_BASIC_CLASSID, f->res.classid))
	293	goto nla_put_failure;
e1e284a4	294
5954894b CW	295	for_each_possible_cpu(cpu) {
	296	struct tc_basic_pcnt *pf = per_cpu_ptr(f->pf, cpu);
	297
	298	gpf.rcnt += pf->rcnt;
	299	gpf.rhit += pf->rhit;
	300	}
	301
	302	if (nla_put_64bit(skb, TCA_BASIC_PCNT,
	303	sizeof(struct tc_basic_pcnt),
	304	&gpf, TCA_BASIC_PAD))
	305	goto nla_put_failure;
	306
5da57f42	307	if (tcf_exts_dump(skb, &f->exts) < 0 \|\|
1da177e4	308	tcf_em_tree_dump(skb, &f->ematches, TCA_BASIC_EMATCHES) < 0)
add93b61	309	goto nla_put_failure;
1da177e4	310
4b3550ef	311	nla_nest_end(skb, nest);
4c46ee52	312
5da57f42	313	if (tcf_exts_dump_stats(skb, &f->exts) < 0)
4c46ee52	314	goto nla_put_failure;
4c46ee52	315
1da177e4 LT	316	return skb->len;
1da177e4 LT	317
add93b61	318	nla_put_failure:
4b3550ef	319	nla_nest_cancel(skb, nest);
1da177e4 LT	320	return -1;
	321	}
	322
2eb9d75c	323	static struct tcf_proto_ops cls_basic_ops __read_mostly = {
1da177e4 LT	324	.kind = "basic",
	325	.classify = basic_classify,
	326	.init = basic_init,
	327	.destroy = basic_destroy,
	328	.get = basic_get,
1da177e4 LT	329	.change = basic_change,
	330	.delete = basic_delete,
	331	.walk = basic_walk,
	332	.dump = basic_dump,
07d79fc7	333	.bind_class = basic_bind_class,
1da177e4 LT	334	.owner = THIS_MODULE,
	335	};
	336
	337	static int __init init_basic(void)
	338	{
	339	return register_tcf_proto_ops(&cls_basic_ops);
	340	}
	341
10297b99	342	static void __exit exit_basic(void)
1da177e4 LT	343	{
	344	unregister_tcf_proto_ops(&cls_basic_ops);
	345	}
	346
	347	module_init(init_basic)
	348	module_exit(exit_basic)
	349	MODULE_LICENSE("GPL");