[deliverable/linux.git] / include / net / pkt_cls.h

#ifndef __NET_PKT_CLS_H
#define __NET_PKT_CLS_H

#include <linux/pkt_cls.h>
#include <net/sch_generic.h>
#include <net/act_api.h>

/* Basic packet classifier frontend definitions. */

struct tcf_walker {
	int	stop;
	int	skip;
	int	count;
	int	(*fn)(struct tcf_proto *, unsigned long node, struct tcf_walker *);
};

int register_tcf_proto_ops(struct tcf_proto_ops *ops);
int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);

static inline unsigned long
__cls_set_class(unsigned long *clp, unsigned long cl)
{
	unsigned long old_cl;
 
	old_cl = *clp;
	*clp = cl;
	return old_cl;
}

static inline unsigned long
cls_set_class(struct tcf_proto *tp, unsigned long *clp, 
	unsigned long cl)
{
	unsigned long old_cl;
	
	tcf_tree_lock(tp);
	old_cl = __cls_set_class(clp, cl);
	tcf_tree_unlock(tp);
 
	return old_cl;
}

static inline void
tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
{
	unsigned long cl;

	cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
	cl = cls_set_class(tp, &r->class, cl);
	if (cl)
		tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
}

static inline void
tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
{
	unsigned long cl;

	if ((cl = __cls_set_class(&r->class, 0)) != 0)
		tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
}

struct tcf_exts {
#ifdef CONFIG_NET_CLS_ACT
	__u32	type; /* for backward compat(TCA_OLD_COMPAT) */
	struct list_head actions;
#endif
};

/* Map to export classifier specific extension TLV types to the
 * generic extensions API. Unsupported extensions must be set to 0.
 */
struct tcf_ext_map {
	int action;
	int police;
};

static inline void tcf_exts_init(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
	INIT_LIST_HEAD(&exts->actions);
#endif
}

/**
 * tcf_exts_is_predicative - check if a predicative extension is present
 * @exts: tc filter extensions handle
 *
 * Returns 1 if a predicative extension is present, i.e. an extension which
 * might cause further actions and thus overrule the regular tcf_result.
 */
static inline int
tcf_exts_is_predicative(struct tcf_exts *exts)
{
#ifdef CONFIG_NET_CLS_ACT
	return !list_empty(&exts->actions);
#else
	return 0;
#endif
}

/**
 * tcf_exts_is_available - check if at least one extension is present
 * @exts: tc filter extensions handle
 *
 * Returns 1 if at least one extension is present.
 */
static inline int
tcf_exts_is_available(struct tcf_exts *exts)
{
	/* All non-predicative extensions must be added here. */
	return tcf_exts_is_predicative(exts);
}

/**
 * tcf_exts_exec - execute tc filter extensions
 * @skb: socket buffer
 * @exts: tc filter extensions handle
 * @res: desired result
 *
 * Executes all configured extensions. Returns 0 on a normal execution,
 * a negative number if the filter must be considered unmatched or
 * a positive action code (TC_ACT_*) which must be returned to the
 * underlying layer.
 */
static inline int
tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
	       struct tcf_result *res)
{
#ifdef CONFIG_NET_CLS_ACT
	if (!list_empty(&exts->actions))
		return tcf_action_exec(skb, &exts->actions, res);
#endif
	return 0;
}

int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
		      struct nlattr **tb, struct nlattr *rate_tlv,
		      struct tcf_exts *exts,
		      const struct tcf_ext_map *map);
void tcf_exts_destroy(struct tcf_proto *tp, struct tcf_exts *exts);
void tcf_exts_change(struct tcf_proto *tp, struct tcf_exts *dst,
		     struct tcf_exts *src);
int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts,
		  const struct tcf_ext_map *map);
int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts,
			const struct tcf_ext_map *map);

/**
 * struct tcf_pkt_info - packet information
 */
struct tcf_pkt_info {
	unsigned char *		ptr;
	int			nexthdr;
};

#ifdef CONFIG_NET_EMATCH

struct tcf_ematch_ops;

/**
 * struct tcf_ematch - extended match (ematch)
 * 
 * @matchid: identifier to allow userspace to reidentify a match
 * @flags: flags specifying attributes and the relation to other matches
 * @ops: the operations lookup table of the corresponding ematch module
 * @datalen: length of the ematch specific configuration data
 * @data: ematch specific data
 */
struct tcf_ematch {
	struct tcf_ematch_ops * ops;
	unsigned long		data;
	unsigned int		datalen;
	u16			matchid;
	u16			flags;
};

static inline int tcf_em_is_container(struct tcf_ematch *em)
{
	return !em->ops;
}

static inline int tcf_em_is_simple(struct tcf_ematch *em)
{
	return em->flags & TCF_EM_SIMPLE;
}

static inline int tcf_em_is_inverted(struct tcf_ematch *em)
{
	return em->flags & TCF_EM_INVERT;
}

static inline int tcf_em_last_match(struct tcf_ematch *em)
{
	return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
}

static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
{
	if (tcf_em_last_match(em))
		return 1;

	if (result == 0 && em->flags & TCF_EM_REL_AND)
		return 1;

	if (result != 0 && em->flags & TCF_EM_REL_OR)
		return 1;

	return 0;
}
	
/**
 * struct tcf_ematch_tree - ematch tree handle
 *
 * @hdr: ematch tree header supplied by userspace
 * @matches: array of ematches
 */
struct tcf_ematch_tree {
	struct tcf_ematch_tree_hdr hdr;
	struct tcf_ematch *	matches;
	
};

/**
 * struct tcf_ematch_ops - ematch module operations
 * 
 * @kind: identifier (kind) of this ematch module
 * @datalen: length of expected configuration data (optional)
 * @change: called during validation (optional)
 * @match: called during ematch tree evaluation, must return 1/0
 * @destroy: called during destroyage (optional)
 * @dump: called during dumping process (optional)
 * @owner: owner, must be set to THIS_MODULE
 * @link: link to previous/next ematch module (internal use)
 */
struct tcf_ematch_ops {
	int			kind;
	int			datalen;
	int			(*change)(struct tcf_proto *, void *,
					  int, struct tcf_ematch *);
	int			(*match)(struct sk_buff *, struct tcf_ematch *,
					 struct tcf_pkt_info *);
	void			(*destroy)(struct tcf_proto *,
					   struct tcf_ematch *);
	int			(*dump)(struct sk_buff *, struct tcf_ematch *);
	struct module		*owner;
	struct list_head	link;
};

int tcf_em_register(struct tcf_ematch_ops *);
void tcf_em_unregister(struct tcf_ematch_ops *);
int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
			 struct tcf_ematch_tree *);
void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
			struct tcf_pkt_info *);

/**
 * tcf_em_tree_change - replace ematch tree of a running classifier
 *
 * @tp: classifier kind handle
 * @dst: destination ematch tree variable
 * @src: source ematch tree (temporary tree from tcf_em_tree_validate)
 *
 * This functions replaces the ematch tree in @dst with the ematch
 * tree in @src. The classifier in charge of the ematch tree may be
 * running.
 */
static inline void tcf_em_tree_change(struct tcf_proto *tp,
				      struct tcf_ematch_tree *dst,
				      struct tcf_ematch_tree *src)
{
	tcf_tree_lock(tp);
	memcpy(dst, src, sizeof(*dst));
	tcf_tree_unlock(tp);
}

/**
 * tcf_em_tree_match - evaulate an ematch tree
 *
 * @skb: socket buffer of the packet in question
 * @tree: ematch tree to be used for evaluation
 * @info: packet information examined by classifier
 *
 * This function matches @skb against the ematch tree in @tree by going
 * through all ematches respecting their logic relations returning
 * as soon as the result is obvious.
 *
 * Returns 1 if the ematch tree as-one matches, no ematches are configured
 * or ematch is not enabled in the kernel, otherwise 0 is returned.
 */
static inline int tcf_em_tree_match(struct sk_buff *skb,
				    struct tcf_ematch_tree *tree,
				    struct tcf_pkt_info *info)
{
	if (tree->hdr.nmatches)
		return __tcf_em_tree_match(skb, tree, info);
	else
		return 1;
}

#define MODULE_ALIAS_TCF_EMATCH(kind)	MODULE_ALIAS("ematch-kind-" __stringify(kind))

#else /* CONFIG_NET_EMATCH */

struct tcf_ematch_tree {
};

#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
#define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
#define tcf_em_tree_dump(skb, t, tlv) (0)
#define tcf_em_tree_change(tp, dst, src) do { } while(0)
#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)

#endif /* CONFIG_NET_EMATCH */

static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
{
	switch (layer) {
		case TCF_LAYER_LINK:
			return skb->data;
		case TCF_LAYER_NETWORK:
			return skb_network_header(skb);
		case TCF_LAYER_TRANSPORT:
			return skb_transport_header(skb);
	}

	return NULL;
}

static inline int tcf_valid_offset(const struct sk_buff *skb,
				   const unsigned char *ptr, const int len)
{
	return likely((ptr + len) <= skb_tail_pointer(skb) &&
		      ptr >= skb->head &&
		      (ptr <= (ptr + len)));
}

#ifdef CONFIG_NET_CLS_IND
#include <net/net_namespace.h>

static inline int
tcf_change_indev(struct tcf_proto *tp, char *indev, struct nlattr *indev_tlv)
{
	if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
		return -EINVAL;
	return 0;
}

static inline int
tcf_match_indev(struct sk_buff *skb, char *indev)
{
	struct net_device *dev;

	if (indev[0]) {
		if  (!skb->skb_iif)
			return 0;
		dev = __dev_get_by_index(dev_net(skb->dev), skb->skb_iif);
		if (!dev || strcmp(indev, dev->name))
			return 0;
	}

	return 1;
}
#endif /* CONFIG_NET_CLS_IND */

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef __NET_PKT_CLS_H
	2	#define __NET_PKT_CLS_H
	3
	4	#include <linux/pkt_cls.h>
	5	#include <net/sch_generic.h>
	6	#include <net/act_api.h>
	7
	8	/* Basic packet classifier frontend definitions. */
	9
fd2c3ef7	10	struct tcf_walker {
1da177e4 LT	11	int stop;
	12	int skip;
	13	int count;
	14	int (fn)(struct tcf_proto , unsigned long node, struct tcf_walker *);
	15	};
	16
5c15257f JP	17	int register_tcf_proto_ops(struct tcf_proto_ops *ops);
5c15257f JP	18	int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
1da177e4 LT	19
	20	static inline unsigned long
	21	__cls_set_class(unsigned long *clp, unsigned long cl)
	22	{
	23	unsigned long old_cl;
	24
	25	old_cl = *clp;
	26	*clp = cl;
	27	return old_cl;
	28	}
	29
	30	static inline unsigned long
	31	cls_set_class(struct tcf_proto tp, unsigned long clp,
	32	unsigned long cl)
	33	{
	34	unsigned long old_cl;
	35
	36	tcf_tree_lock(tp);
	37	old_cl = __cls_set_class(clp, cl);
	38	tcf_tree_unlock(tp);
	39
	40	return old_cl;
	41	}
	42
	43	static inline void
	44	tcf_bind_filter(struct tcf_proto tp, struct tcf_result r, unsigned long base)
	45	{
	46	unsigned long cl;
	47
	48	cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
	49	cl = cls_set_class(tp, &r->class, cl);
	50	if (cl)
	51	tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
	52	}
	53
	54	static inline void
	55	tcf_unbind_filter(struct tcf_proto tp, struct tcf_result r)
	56	{
	57	unsigned long cl;
	58
	59	if ((cl = __cls_set_class(&r->class, 0)) != 0)
	60	tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
	61	}
	62
fd2c3ef7	63	struct tcf_exts {
1da177e4	64	#ifdef CONFIG_NET_CLS_ACT
33be6271 WC	65	__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
33be6271 WC	66	struct list_head actions;
1da177e4 LT	67	#endif
	68	};
	69
	70	/* Map to export classifier specific extension TLV types to the
	71	* generic extensions API. Unsupported extensions must be set to 0.
	72	*/
fd2c3ef7	73	struct tcf_ext_map {
1da177e4 LT	74	int action;
	75	int police;
	76	};
	77
33be6271 WC	78	static inline void tcf_exts_init(struct tcf_exts *exts)
	79	{
	80	#ifdef CONFIG_NET_CLS_ACT
	81	INIT_LIST_HEAD(&exts->actions);
	82	#endif
	83	}
	84
1da177e4 LT	85	/**
	86	* tcf_exts_is_predicative - check if a predicative extension is present
	87	* @exts: tc filter extensions handle
	88	*
	89	* Returns 1 if a predicative extension is present, i.e. an extension which
	90	* might cause further actions and thus overrule the regular tcf_result.
	91	*/
	92	static inline int
	93	tcf_exts_is_predicative(struct tcf_exts *exts)
	94	{
	95	#ifdef CONFIG_NET_CLS_ACT
33be6271	96	return !list_empty(&exts->actions);
1da177e4 LT	97	#else
	98	return 0;
	99	#endif
	100	}
	101
	102	/**
	103	* tcf_exts_is_available - check if at least one extension is present
	104	* @exts: tc filter extensions handle
	105	*
	106	* Returns 1 if at least one extension is present.
	107	*/
	108	static inline int
	109	tcf_exts_is_available(struct tcf_exts *exts)
	110	{
	111	/* All non-predicative extensions must be added here. */
	112	return tcf_exts_is_predicative(exts);
	113	}
	114
	115	/**
	116	* tcf_exts_exec - execute tc filter extensions
	117	* @skb: socket buffer
	118	* @exts: tc filter extensions handle
	119	* @res: desired result
	120	*
	121	* Executes all configured extensions. Returns 0 on a normal execution,
	122	* a negative number if the filter must be considered unmatched or
	123	* a positive action code (TC_ACT_*) which must be returned to the
	124	* underlying layer.
	125	*/
	126	static inline int
	127	tcf_exts_exec(struct sk_buff skb, struct tcf_exts exts,
	128	struct tcf_result *res)
	129	{
	130	#ifdef CONFIG_NET_CLS_ACT
33be6271 WC	131	if (!list_empty(&exts->actions))
33be6271 WC	132	return tcf_action_exec(skb, &exts->actions, res);
1da177e4	133	#endif
1da177e4 LT	134	return 0;
	135	}
	136
5c15257f JP	137	int tcf_exts_validate(struct net net, struct tcf_proto tp,
	138	struct nlattr *tb, struct nlattr rate_tlv,
	139	struct tcf_exts *exts,
	140	const struct tcf_ext_map *map);
	141	void tcf_exts_destroy(struct tcf_proto tp, struct tcf_exts exts);
	142	void tcf_exts_change(struct tcf_proto tp, struct tcf_exts dst,
	143	struct tcf_exts *src);
	144	int tcf_exts_dump(struct sk_buff skb, struct tcf_exts exts,
	145	const struct tcf_ext_map *map);
	146	int tcf_exts_dump_stats(struct sk_buff skb, struct tcf_exts exts,
	147	const struct tcf_ext_map *map);
1da177e4 LT	148
	149	/**
	150	* struct tcf_pkt_info - packet information
	151	*/
fd2c3ef7	152	struct tcf_pkt_info {
1da177e4 LT	153	unsigned char * ptr;
	154	int nexthdr;
	155	};
	156
	157	#ifdef CONFIG_NET_EMATCH
	158
	159	struct tcf_ematch_ops;
	160
	161	/**
	162	* struct tcf_ematch - extended match (ematch)
	163	*
	164	* @matchid: identifier to allow userspace to reidentify a match
	165	* @flags: flags specifying attributes and the relation to other matches
	166	* @ops: the operations lookup table of the corresponding ematch module
	167	* @datalen: length of the ematch specific configuration data
	168	* @data: ematch specific data
	169	*/
fd2c3ef7	170	struct tcf_ematch {
1da177e4 LT	171	struct tcf_ematch_ops * ops;
	172	unsigned long data;
	173	unsigned int datalen;
	174	u16 matchid;
	175	u16 flags;
	176	};
	177
	178	static inline int tcf_em_is_container(struct tcf_ematch *em)
	179	{
	180	return !em->ops;
	181	}
	182
	183	static inline int tcf_em_is_simple(struct tcf_ematch *em)
	184	{
	185	return em->flags & TCF_EM_SIMPLE;
	186	}
	187
	188	static inline int tcf_em_is_inverted(struct tcf_ematch *em)
	189	{
	190	return em->flags & TCF_EM_INVERT;
	191	}
	192
	193	static inline int tcf_em_last_match(struct tcf_ematch *em)
	194	{
	195	return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
	196	}
	197
	198	static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
	199	{
	200	if (tcf_em_last_match(em))
	201	return 1;
	202
	203	if (result == 0 && em->flags & TCF_EM_REL_AND)
	204	return 1;
	205
	206	if (result != 0 && em->flags & TCF_EM_REL_OR)
	207	return 1;
	208
	209	return 0;
	210	}
	211
	212	/**
	213	* struct tcf_ematch_tree - ematch tree handle
	214	*
	215	* @hdr: ematch tree header supplied by userspace
	216	* @matches: array of ematches
	217	*/
fd2c3ef7	218	struct tcf_ematch_tree {
1da177e4 LT	219	struct tcf_ematch_tree_hdr hdr;
	220	struct tcf_ematch * matches;
	221
	222	};
	223
	224	/**
	225	* struct tcf_ematch_ops - ematch module operations
	226	*
	227	* @kind: identifier (kind) of this ematch module
	228	* @datalen: length of expected configuration data (optional)
	229	* @change: called during validation (optional)
	230	* @match: called during ematch tree evaluation, must return 1/0
	231	* @destroy: called during destroyage (optional)
	232	* @dump: called during dumping process (optional)
	233	* @owner: owner, must be set to THIS_MODULE
	234	* @link: link to previous/next ematch module (internal use)
	235	*/
fd2c3ef7	236	struct tcf_ematch_ops {
1da177e4 LT	237	int kind;
	238	int datalen;
	239	int (change)(struct tcf_proto , void *,
	240	int, struct tcf_ematch *);
	241	int (match)(struct sk_buff , struct tcf_ematch *,
	242	struct tcf_pkt_info *);
	243	void (destroy)(struct tcf_proto ,
	244	struct tcf_ematch *);
	245	int (dump)(struct sk_buff , struct tcf_ematch *);
	246	struct module *owner;
	247	struct list_head link;
	248	};
	249
5c15257f JP	250	int tcf_em_register(struct tcf_ematch_ops *);
	251	void tcf_em_unregister(struct tcf_ematch_ops *);
	252	int tcf_em_tree_validate(struct tcf_proto , struct nlattr ,
	253	struct tcf_ematch_tree *);
	254	void tcf_em_tree_destroy(struct tcf_proto , struct tcf_ematch_tree );
	255	int tcf_em_tree_dump(struct sk_buff , struct tcf_ematch_tree , int);
	256	int __tcf_em_tree_match(struct sk_buff , struct tcf_ematch_tree ,
	257	struct tcf_pkt_info *);
1da177e4 LT	258
	259	/**
	260	* tcf_em_tree_change - replace ematch tree of a running classifier
	261	*
	262	* @tp: classifier kind handle
	263	* @dst: destination ematch tree variable
	264	* @src: source ematch tree (temporary tree from tcf_em_tree_validate)
	265	*
	266	* This functions replaces the ematch tree in @dst with the ematch
	267	* tree in @src. The classifier in charge of the ematch tree may be
	268	* running.
	269	*/
	270	static inline void tcf_em_tree_change(struct tcf_proto *tp,
	271	struct tcf_ematch_tree *dst,
	272	struct tcf_ematch_tree *src)
	273	{
	274	tcf_tree_lock(tp);
	275	memcpy(dst, src, sizeof(*dst));
	276	tcf_tree_unlock(tp);
	277	}
	278
	279	/**
	280	* tcf_em_tree_match - evaulate an ematch tree
	281	*
	282	* @skb: socket buffer of the packet in question
	283	* @tree: ematch tree to be used for evaluation
	284	* @info: packet information examined by classifier
	285	*
	286	* This function matches @skb against the ematch tree in @tree by going
	287	* through all ematches respecting their logic relations returning
	288	* as soon as the result is obvious.
	289	*
	290	* Returns 1 if the ematch tree as-one matches, no ematches are configured
	291	* or ematch is not enabled in the kernel, otherwise 0 is returned.
	292	*/
	293	static inline int tcf_em_tree_match(struct sk_buff *skb,
	294	struct tcf_ematch_tree *tree,
	295	struct tcf_pkt_info *info)
	296	{
	297	if (tree->hdr.nmatches)
	298	return __tcf_em_tree_match(skb, tree, info);
	299	else
	300	return 1;
	301	}
	302
db3d99c0 PM	303	#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
db3d99c0 PM	304
1da177e4 LT	305	#else /* CONFIG_NET_EMATCH */
1da177e4 LT	306
fd2c3ef7	307	struct tcf_ematch_tree {
1da177e4 LT	308	};
	309
	310	#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
	311	#define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
	312	#define tcf_em_tree_dump(skb, t, tlv) (0)
	313	#define tcf_em_tree_change(tp, dst, src) do { } while(0)
	314	#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
	315
	316	#endif /* CONFIG_NET_EMATCH */
	317
	318	static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
	319	{
	320	switch (layer) {
	321	case TCF_LAYER_LINK:
	322	return skb->data;
	323	case TCF_LAYER_NETWORK:
d56f90a7	324	return skb_network_header(skb);
1da177e4	325	case TCF_LAYER_TRANSPORT:
9c70220b	326	return skb_transport_header(skb);
1da177e4 LT	327	}
	328
	329	return NULL;
	330	}
	331
eddc9ec5 ACM	332	static inline int tcf_valid_offset(const struct sk_buff *skb,
eddc9ec5 ACM	333	const unsigned char *ptr, const int len)
1da177e4	334	{
da521b2c DM	335	return likely((ptr + len) <= skb_tail_pointer(skb) &&
	336	ptr >= skb->head &&
	337	(ptr <= (ptr + len)));
1da177e4 LT	338	}
	339
	340	#ifdef CONFIG_NET_CLS_IND
0eeb8ffc DL	341	#include <net/net_namespace.h>
0eeb8ffc DL	342
1da177e4	343	static inline int
add93b61	344	tcf_change_indev(struct tcf_proto tp, char indev, struct nlattr *indev_tlv)
1da177e4	345	{
add93b61	346	if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
1da177e4 LT	347	return -EINVAL;
	348	return 0;
	349	}
	350
	351	static inline int
	352	tcf_match_indev(struct sk_buff skb, char indev)
	353	{
c01003c2 PM	354	struct net_device *dev;
c01003c2 PM	355
86e65da9	356	if (indev[0]) {
8964be4a	357	if (!skb->skb_iif)
1da177e4	358	return 0;
8964be4a	359	dev = __dev_get_by_index(dev_net(skb->dev), skb->skb_iif);
c01003c2	360	if (!dev \|\| strcmp(indev, dev->name))
1da177e4 LT	361	return 0;
	362	}
	363
	364	return 1;
	365	}
	366	#endif /* CONFIG_NET_CLS_IND */
	367
	368	#endif