[mirror_ubuntu-jammy-kernel.git] / net / sched / cls_basic.c

/*
 * net/sched/cls_basic.c	Basic Packet Classifier.
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * 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(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, 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(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
1da177e4 LT	1	/*
	2	* net/sched/cls_basic.c Basic Packet Classifier.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; either version
	7	* 2 of the License, or (at your option) any later version.
	8	*
	9	* Authors: Thomas Graf <tgraf@suug.ch>
	10	*/
	11
1da177e4	12	#include <linux/module.h>
5a0e3ad6	13	#include <linux/slab.h>
1da177e4 LT	14	#include <linux/types.h>
1da177e4 LT	15	#include <linux/kernel.h>
1da177e4	16	#include <linux/string.h>
1da177e4 LT	17	#include <linux/errno.h>
	18	#include <linux/rtnetlink.h>
	19	#include <linux/skbuff.h>
1d8134fe	20	#include <linux/idr.h>
5954894b	21	#include <linux/percpu.h>
dc5fc579	22	#include <net/netlink.h>
1da177e4 LT	23	#include <net/act_api.h>
	24	#include <net/pkt_cls.h>
	25
cc7ec456	26	struct basic_head {
1da177e4	27	struct list_head flist;
1d8134fe	28	struct idr handle_idr;
9888faef	29	struct rcu_head rcu;
1da177e4 LT	30	};
1da177e4 LT	31
cc7ec456	32	struct basic_filter {
1da177e4 LT	33	u32 handle;
	34	struct tcf_exts exts;
	35	struct tcf_ematch_tree ematches;
	36	struct tcf_result res;
9888faef	37	struct tcf_proto *tp;
1da177e4	38	struct list_head link;
5954894b	39	struct tc_basic_pcnt __percpu *pf;
aaa908ff	40	struct rcu_work rwork;
1da177e4 LT	41	};
1da177e4 LT	42
dc7f9f6e	43	static int basic_classify(struct sk_buff skb, const struct tcf_proto tp,
1da177e4 LT	44	struct tcf_result *res)
	45	{
	46	int r;
9888faef	47	struct basic_head *head = rcu_dereference_bh(tp->root);
1da177e4 LT	48	struct basic_filter *f;
1da177e4 LT	49
9888faef	50	list_for_each_entry_rcu(f, &head->flist, link) {
5954894b	51	__this_cpu_inc(f->pf->rcnt);
1da177e4 LT	52	if (!tcf_em_tree_match(skb, &f->ematches, NULL))
1da177e4 LT	53	continue;
5954894b	54	__this_cpu_inc(f->pf->rhit);
1da177e4 LT	55	*res = f->res;
	56	r = tcf_exts_exec(skb, &f->exts, res);
	57	if (r < 0)
	58	continue;
	59	return r;
	60	}
	61	return -1;
	62	}
	63
8113c095	64	static void basic_get(struct tcf_proto tp, u32 handle)
1da177e4	65	{
9888faef	66	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4 LT	67	struct basic_filter *f;
1da177e4 LT	68
1c1bc6bd DB	69	list_for_each_entry(f, &head->flist, link) {
1c1bc6bd DB	70	if (f->handle == handle) {
8113c095	71	return f;
1c1bc6bd DB	72	}
1c1bc6bd DB	73	}
1da177e4	74
8113c095	75	return NULL;
1da177e4 LT	76	}
1da177e4 LT	77
1da177e4 LT	78	static int basic_init(struct tcf_proto *tp)
1da177e4 LT	79	{
d3fa76ee PM	80	struct basic_head *head;
	81
	82	head = kzalloc(sizeof(*head), GFP_KERNEL);
	83	if (head == NULL)
	84	return -ENOBUFS;
	85	INIT_LIST_HEAD(&head->flist);
1d8134fe	86	idr_init(&head->handle_idr);
9888faef	87	rcu_assign_pointer(tp->root, head);
1da177e4 LT	88	return 0;
	89	}
	90
0b2a5989 CW	91	static void __basic_delete_filter(struct basic_filter *f)
	92	{
	93	tcf_exts_destroy(&f->exts);
	94	tcf_em_tree_destroy(&f->ematches);
	95	tcf_exts_put_net(&f->exts);
5954894b	96	free_percpu(f->pf);
0b2a5989 CW	97	kfree(f);
	98	}
	99
c96a4838	100	static void basic_delete_filter_work(struct work_struct *work)
1da177e4	101	{
aaa908ff CW	102	struct basic_filter *f = container_of(to_rcu_work(work),
	103	struct basic_filter,
	104	rwork);
c96a4838	105	rtnl_lock();
0b2a5989	106	__basic_delete_filter(f);
c96a4838	107	rtnl_unlock();
1da177e4 LT	108	}
1da177e4 LT	109
12db03b6 VB	110	static void basic_destroy(struct tcf_proto *tp, bool rtnl_held,
12db03b6 VB	111	struct netlink_ext_ack *extack)
1da177e4	112	{
9888faef	113	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4	114	struct basic_filter f, n;
10297b99	115
1da177e4	116	list_for_each_entry_safe(f, n, &head->flist, link) {
9888faef	117	list_del_rcu(&f->link);
18cdb37e	118	tcf_unbind_filter(tp, &f->res);
9c160941	119	idr_remove(&head->handle_idr, f->handle);
0b2a5989	120	if (tcf_exts_get_net(&f->exts))
aaa908ff	121	tcf_queue_work(&f->rwork, basic_delete_filter_work);
0b2a5989 CW	122	else
0b2a5989 CW	123	__basic_delete_filter(f);
1da177e4	124	}
1d8134fe	125	idr_destroy(&head->handle_idr);
9888faef	126	kfree_rcu(head, rcu);
1da177e4 LT	127	}
1da177e4 LT	128
571acf21	129	static int basic_delete(struct tcf_proto tp, void arg, bool *last,
12db03b6	130	bool rtnl_held, struct netlink_ext_ack *extack)
1da177e4	131	{
763dbf63	132	struct basic_head *head = rtnl_dereference(tp->root);
8113c095	133	struct basic_filter *f = arg;
1da177e4	134
e4386456 JP	135	list_del_rcu(&f->link);
e4386456 JP	136	tcf_unbind_filter(tp, &f->res);
9c160941	137	idr_remove(&head->handle_idr, f->handle);
0b2a5989	138	tcf_exts_get_net(&f->exts);
aaa908ff	139	tcf_queue_work(&f->rwork, basic_delete_filter_work);
763dbf63	140	*last = list_empty(&head->flist);
e4386456	141	return 0;
1da177e4 LT	142	}
1da177e4 LT	143
6fa8c014 PM	144	static const struct nla_policy basic_policy[TCA_BASIC_MAX + 1] = {
	145	[TCA_BASIC_CLASSID] = { .type = NLA_U32 },
	146	[TCA_BASIC_EMATCHES] = { .type = NLA_NESTED },
	147	};
	148
c1b52739 BL	149	static int basic_set_parms(struct net net, struct tcf_proto tp,
	150	struct basic_filter *f, unsigned long base,
	151	struct nlattr **tb,
50a56190 AA	152	struct nlattr *est, bool ovr,
50a56190 AA	153	struct netlink_ext_ack *extack)
1da177e4	154	{
6459082a	155	int err;
1da177e4	156
ec6743a1	157	err = tcf_exts_validate(net, tp, tb, est, &f->exts, ovr, true, extack);
1da177e4 LT	158	if (err < 0)
	159	return err;
	160
4ebc1e3c	161	err = tcf_em_tree_validate(tp, tb[TCA_BASIC_EMATCHES], &f->ematches);
1da177e4	162	if (err < 0)
ff1f8ca0	163	return err;
1da177e4	164
add93b61	165	if (tb[TCA_BASIC_CLASSID]) {
1587bac4	166	f->res.classid = nla_get_u32(tb[TCA_BASIC_CLASSID]);
1da177e4 LT	167	tcf_bind_filter(tp, &f->res, base);
	168	}
	169
9888faef	170	f->tp = tp;
1da177e4	171	return 0;
1da177e4 LT	172	}
1da177e4 LT	173
c1b52739	174	static int basic_change(struct net net, struct sk_buff in_skb,
af4c6641	175	struct tcf_proto *tp, unsigned long base, u32 handle,
7306db38	176	struct nlattr tca, void arg, bool ovr,
12db03b6	177	bool rtnl_held, struct netlink_ext_ack *extack)
1da177e4	178	{
cee63723	179	int err;
9888faef	180	struct basic_head *head = rtnl_dereference(tp->root);
add93b61	181	struct nlattr *tb[TCA_BASIC_MAX + 1];
9888faef JF	182	struct basic_filter fold = (struct basic_filter ) *arg;
9888faef JF	183	struct basic_filter *fnew;
1da177e4	184
add93b61	185	if (tca[TCA_OPTIONS] == NULL)
1da177e4 LT	186	return -EINVAL;
1da177e4 LT	187
6fa8c014	188	err = nla_parse_nested(tb, TCA_BASIC_MAX, tca[TCA_OPTIONS],
fceb6435	189	basic_policy, NULL);
cee63723 PM	190	if (err < 0)
cee63723 PM	191	return err;
1da177e4	192
9888faef JF	193	if (fold != NULL) {
9888faef JF	194	if (handle && fold->handle != handle)
1da177e4	195	return -EINVAL;
1da177e4 LT	196	}
1da177e4 LT	197
9888faef	198	fnew = kzalloc(sizeof(*fnew), GFP_KERNEL);
bd42b788 JP	199	if (!fnew)
bd42b788 JP	200	return -ENOBUFS;
1da177e4	201
b9a24bb7 WC	202	err = tcf_exts_init(&fnew->exts, TCA_BASIC_ACT, TCA_BASIC_POLICE);
	203	if (err < 0)
	204	goto errout;
	205
05af0ebb MW	206	if (!handle) {
	207	handle = 1;
	208	err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
	209	INT_MAX, GFP_KERNEL);
	210	} else if (!fold) {
	211	err = idr_alloc_u32(&head->handle_idr, fnew, &handle,
	212	handle, GFP_KERNEL);
1da177e4	213	}
05af0ebb MW	214	if (err)
	215	goto errout;
	216	fnew->handle = handle;
5954894b CW	217	fnew->pf = alloc_percpu(struct tc_basic_pcnt);
	218	if (!fnew->pf) {
	219	err = -ENOMEM;
	220	goto errout;
	221	}
1da177e4	222
50a56190 AA	223	err = basic_set_parms(net, tp, fnew, base, tb, tca[TCA_RATE], ovr,
50a56190 AA	224	extack);
1d8134fe CW	225	if (err < 0) {
1d8134fe CW	226	if (!fold)
9c160941	227	idr_remove(&head->handle_idr, fnew->handle);
1da177e4	228	goto errout;
1d8134fe	229	}
1da177e4	230
8113c095	231	*arg = fnew;
9888faef JF	232
9888faef JF	233	if (fold) {
234a4624	234	idr_replace(&head->handle_idr, fnew, fnew->handle);
9888faef	235	list_replace_rcu(&fold->link, &fnew->link);
18cdb37e	236	tcf_unbind_filter(tp, &fold->res);
0b2a5989	237	tcf_exts_get_net(&fold->exts);
aaa908ff	238	tcf_queue_work(&fold->rwork, basic_delete_filter_work);
9888faef JF	239	} else {
	240	list_add_rcu(&fnew->link, &head->flist);
	241	}
1da177e4 LT	242
	243	return 0;
	244	errout:
5954894b	245	free_percpu(fnew->pf);
b9a24bb7	246	tcf_exts_destroy(&fnew->exts);
9888faef	247	kfree(fnew);
1da177e4 LT	248	return err;
	249	}
	250
12db03b6 VB	251	static void basic_walk(struct tcf_proto tp, struct tcf_walker arg,
12db03b6 VB	252	bool rtnl_held)
1da177e4	253	{
9888faef	254	struct basic_head *head = rtnl_dereference(tp->root);
1da177e4 LT	255	struct basic_filter *f;
	256
	257	list_for_each_entry(f, &head->flist, link) {
	258	if (arg->count < arg->skip)
	259	goto skip;
	260
8113c095	261	if (arg->fn(tp, f, arg) < 0) {
1da177e4 LT	262	arg->stop = 1;
	263	break;
	264	}
	265	skip:
	266	arg->count++;
	267	}
	268	}
	269
07d79fc7 CW	270	static void basic_bind_class(void *fh, u32 classid, unsigned long cl)
	271	{
	272	struct basic_filter *f = fh;
	273
	274	if (f && f->res.classid == classid)
	275	f->res.class = cl;
	276	}
	277
8113c095	278	static int basic_dump(struct net net, struct tcf_proto tp, void *fh,
12db03b6	279	struct sk_buff skb, struct tcmsg t, bool rtnl_held)
1da177e4	280	{
5954894b	281	struct tc_basic_pcnt gpf = {};
8113c095	282	struct basic_filter *f = fh;
4b3550ef	283	struct nlattr *nest;
5954894b	284	int cpu;
1da177e4 LT	285
	286	if (f == NULL)
	287	return skb->len;
	288
	289	t->tcm_handle = f->handle;
	290
4b3550ef PM	291	nest = nla_nest_start(skb, TCA_OPTIONS);
	292	if (nest == NULL)
	293	goto nla_put_failure;
1da177e4	294
1b34ec43 DM	295	if (f->res.classid &&
	296	nla_put_u32(skb, TCA_BASIC_CLASSID, f->res.classid))
	297	goto nla_put_failure;
e1e284a4	298
5954894b CW	299	for_each_possible_cpu(cpu) {
	300	struct tc_basic_pcnt *pf = per_cpu_ptr(f->pf, cpu);
	301
	302	gpf.rcnt += pf->rcnt;
	303	gpf.rhit += pf->rhit;
	304	}
	305
	306	if (nla_put_64bit(skb, TCA_BASIC_PCNT,
	307	sizeof(struct tc_basic_pcnt),
	308	&gpf, TCA_BASIC_PAD))
	309	goto nla_put_failure;
	310
5da57f42	311	if (tcf_exts_dump(skb, &f->exts) < 0 \|\|
1da177e4	312	tcf_em_tree_dump(skb, &f->ematches, TCA_BASIC_EMATCHES) < 0)
add93b61	313	goto nla_put_failure;
1da177e4	314
4b3550ef	315	nla_nest_end(skb, nest);
4c46ee52	316
5da57f42	317	if (tcf_exts_dump_stats(skb, &f->exts) < 0)
4c46ee52	318	goto nla_put_failure;
4c46ee52	319
1da177e4 LT	320	return skb->len;
1da177e4 LT	321
add93b61	322	nla_put_failure:
4b3550ef	323	nla_nest_cancel(skb, nest);
1da177e4 LT	324	return -1;
	325	}
	326
2eb9d75c	327	static struct tcf_proto_ops cls_basic_ops __read_mostly = {
1da177e4 LT	328	.kind = "basic",
	329	.classify = basic_classify,
	330	.init = basic_init,
	331	.destroy = basic_destroy,
	332	.get = basic_get,
1da177e4 LT	333	.change = basic_change,
	334	.delete = basic_delete,
	335	.walk = basic_walk,
	336	.dump = basic_dump,
07d79fc7	337	.bind_class = basic_bind_class,
1da177e4 LT	338	.owner = THIS_MODULE,
	339	};
	340
	341	static int __init init_basic(void)
	342	{
	343	return register_tcf_proto_ops(&cls_basic_ops);
	344	}
	345
10297b99	346	static void __exit exit_basic(void)
1da177e4 LT	347	{
	348	unregister_tcf_proto_ops(&cls_basic_ops);
	349	}
	350
	351	module_init(init_basic)
	352	module_exit(exit_basic)
	353	MODULE_LICENSE("GPL");