[mirror_ubuntu-bionic-kernel.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.
	 */
	int action;
	int police;
};

static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
{
#ifdef CONFIG_NET_CLS_ACT
	exts->type = 0;
	INIT_LIST_HEAD(&exts->actions);
#endif
	exts->action = action;
	exts->police = police;
}

/**
 * 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, bool ovr);
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);
int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);

/**
 * 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 net *net, struct nlattr *indev_tlv)
{
	char indev[IFNAMSIZ];
	struct net_device *dev;

	if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
		return -EINVAL;
	dev = __dev_get_by_name(net, indev);
	if (!dev)
		return -ENODEV;
	return dev->ifindex;
}

static inline bool
tcf_match_indev(struct sk_buff *skb, int ifindex)
{
	if (!ifindex)
		return true;
	if  (!skb->skb_iif)
		return false;
	return ifindex == skb->skb_iif;
}
#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	67	#endif
5da57f42 WC	68	/* Map to export classifier specific extension TLV types to the
	69	* generic extensions API. Unsupported extensions must be set to 0.
	70	*/
1da177e4 LT	71	int action;
	72	int police;
	73	};
	74
5da57f42	75	static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
33be6271 WC	76	{
33be6271 WC	77	#ifdef CONFIG_NET_CLS_ACT
5da57f42	78	exts->type = 0;
33be6271 WC	79	INIT_LIST_HEAD(&exts->actions);
33be6271 WC	80	#endif
5da57f42 WC	81	exts->action = action;
5da57f42 WC	82	exts->police = police;
33be6271 WC	83	}
33be6271 WC	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,
5c15257f JP	138	struct nlattr *tb, struct nlattr rate_tlv,
2f7ef2f8	139	struct tcf_exts *exts, bool ovr);
5c15257f JP	140	void tcf_exts_destroy(struct tcf_proto tp, struct tcf_exts exts);
	141	void tcf_exts_change(struct tcf_proto tp, struct tcf_exts dst,
	142	struct tcf_exts *src);
5da57f42 WC	143	int tcf_exts_dump(struct sk_buff skb, struct tcf_exts exts);
5da57f42 WC	144	int tcf_exts_dump_stats(struct sk_buff skb, struct tcf_exts exts);
1da177e4 LT	145
	146	/**
	147	* struct tcf_pkt_info - packet information
	148	*/
fd2c3ef7	149	struct tcf_pkt_info {
1da177e4 LT	150	unsigned char * ptr;
	151	int nexthdr;
	152	};
	153
	154	#ifdef CONFIG_NET_EMATCH
	155
	156	struct tcf_ematch_ops;
	157
	158	/**
	159	* struct tcf_ematch - extended match (ematch)
	160	*
	161	* @matchid: identifier to allow userspace to reidentify a match
	162	* @flags: flags specifying attributes and the relation to other matches
	163	* @ops: the operations lookup table of the corresponding ematch module
	164	* @datalen: length of the ematch specific configuration data
	165	* @data: ematch specific data
	166	*/
fd2c3ef7	167	struct tcf_ematch {
1da177e4 LT	168	struct tcf_ematch_ops * ops;
	169	unsigned long data;
	170	unsigned int datalen;
	171	u16 matchid;
	172	u16 flags;
	173	};
	174
	175	static inline int tcf_em_is_container(struct tcf_ematch *em)
	176	{
	177	return !em->ops;
	178	}
	179
	180	static inline int tcf_em_is_simple(struct tcf_ematch *em)
	181	{
	182	return em->flags & TCF_EM_SIMPLE;
	183	}
	184
	185	static inline int tcf_em_is_inverted(struct tcf_ematch *em)
	186	{
	187	return em->flags & TCF_EM_INVERT;
	188	}
	189
	190	static inline int tcf_em_last_match(struct tcf_ematch *em)
	191	{
	192	return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
	193	}
	194
	195	static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
	196	{
	197	if (tcf_em_last_match(em))
	198	return 1;
	199
	200	if (result == 0 && em->flags & TCF_EM_REL_AND)
	201	return 1;
	202
	203	if (result != 0 && em->flags & TCF_EM_REL_OR)
	204	return 1;
	205
	206	return 0;
	207	}
	208
	209	/**
	210	* struct tcf_ematch_tree - ematch tree handle
	211	*
	212	* @hdr: ematch tree header supplied by userspace
	213	* @matches: array of ematches
	214	*/
fd2c3ef7	215	struct tcf_ematch_tree {
1da177e4 LT	216	struct tcf_ematch_tree_hdr hdr;
	217	struct tcf_ematch * matches;
	218
	219	};
	220
	221	/**
	222	* struct tcf_ematch_ops - ematch module operations
	223	*
	224	* @kind: identifier (kind) of this ematch module
	225	* @datalen: length of expected configuration data (optional)
	226	* @change: called during validation (optional)
	227	* @match: called during ematch tree evaluation, must return 1/0
	228	* @destroy: called during destroyage (optional)
	229	* @dump: called during dumping process (optional)
	230	* @owner: owner, must be set to THIS_MODULE
	231	* @link: link to previous/next ematch module (internal use)
	232	*/
fd2c3ef7	233	struct tcf_ematch_ops {
1da177e4 LT	234	int kind;
	235	int datalen;
	236	int (change)(struct tcf_proto , void *,
	237	int, struct tcf_ematch *);
	238	int (match)(struct sk_buff , struct tcf_ematch *,
	239	struct tcf_pkt_info *);
	240	void (destroy)(struct tcf_proto ,
	241	struct tcf_ematch *);
	242	int (dump)(struct sk_buff , struct tcf_ematch *);
	243	struct module *owner;
	244	struct list_head link;
	245	};
	246
5c15257f JP	247	int tcf_em_register(struct tcf_ematch_ops *);
	248	void tcf_em_unregister(struct tcf_ematch_ops *);
	249	int tcf_em_tree_validate(struct tcf_proto , struct nlattr ,
	250	struct tcf_ematch_tree *);
	251	void tcf_em_tree_destroy(struct tcf_proto , struct tcf_ematch_tree );
	252	int tcf_em_tree_dump(struct sk_buff , struct tcf_ematch_tree , int);
	253	int __tcf_em_tree_match(struct sk_buff , struct tcf_ematch_tree ,
	254	struct tcf_pkt_info *);
1da177e4 LT	255
	256	/**
	257	* tcf_em_tree_change - replace ematch tree of a running classifier
	258	*
	259	* @tp: classifier kind handle
	260	* @dst: destination ematch tree variable
	261	* @src: source ematch tree (temporary tree from tcf_em_tree_validate)
	262	*
	263	* This functions replaces the ematch tree in @dst with the ematch
	264	* tree in @src. The classifier in charge of the ematch tree may be
	265	* running.
	266	*/
	267	static inline void tcf_em_tree_change(struct tcf_proto *tp,
	268	struct tcf_ematch_tree *dst,
	269	struct tcf_ematch_tree *src)
	270	{
	271	tcf_tree_lock(tp);
	272	memcpy(dst, src, sizeof(*dst));
	273	tcf_tree_unlock(tp);
	274	}
	275
	276	/**
	277	* tcf_em_tree_match - evaulate an ematch tree
	278	*
	279	* @skb: socket buffer of the packet in question
	280	* @tree: ematch tree to be used for evaluation
	281	* @info: packet information examined by classifier
	282	*
	283	* This function matches @skb against the ematch tree in @tree by going
	284	* through all ematches respecting their logic relations returning
	285	* as soon as the result is obvious.
	286	*
	287	* Returns 1 if the ematch tree as-one matches, no ematches are configured
	288	* or ematch is not enabled in the kernel, otherwise 0 is returned.
	289	*/
	290	static inline int tcf_em_tree_match(struct sk_buff *skb,
	291	struct tcf_ematch_tree *tree,
	292	struct tcf_pkt_info *info)
	293	{
	294	if (tree->hdr.nmatches)
	295	return __tcf_em_tree_match(skb, tree, info);
	296	else
	297	return 1;
	298	}
	299
db3d99c0 PM	300	#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
db3d99c0 PM	301
1da177e4 LT	302	#else /* CONFIG_NET_EMATCH */
1da177e4 LT	303
fd2c3ef7	304	struct tcf_ematch_tree {
1da177e4 LT	305	};
	306
	307	#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
	308	#define tcf_em_tree_destroy(tp, t) do { (void)(t); } while(0)
	309	#define tcf_em_tree_dump(skb, t, tlv) (0)
	310	#define tcf_em_tree_change(tp, dst, src) do { } while(0)
	311	#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
	312
	313	#endif /* CONFIG_NET_EMATCH */
	314
	315	static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
	316	{
	317	switch (layer) {
	318	case TCF_LAYER_LINK:
	319	return skb->data;
	320	case TCF_LAYER_NETWORK:
d56f90a7	321	return skb_network_header(skb);
1da177e4	322	case TCF_LAYER_TRANSPORT:
9c70220b	323	return skb_transport_header(skb);
1da177e4 LT	324	}
	325
	326	return NULL;
	327	}
	328
eddc9ec5 ACM	329	static inline int tcf_valid_offset(const struct sk_buff *skb,
eddc9ec5 ACM	330	const unsigned char *ptr, const int len)
1da177e4	331	{
da521b2c DM	332	return likely((ptr + len) <= skb_tail_pointer(skb) &&
	333	ptr >= skb->head &&
	334	(ptr <= (ptr + len)));
1da177e4 LT	335	}
	336
	337	#ifdef CONFIG_NET_CLS_IND
0eeb8ffc DL	338	#include <net/net_namespace.h>
0eeb8ffc DL	339
1da177e4	340	static inline int
2519a602	341	tcf_change_indev(struct net net, struct nlattr indev_tlv)
1da177e4	342	{
2519a602 WC	343	char indev[IFNAMSIZ];
	344	struct net_device *dev;
	345
add93b61	346	if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
1da177e4	347	return -EINVAL;
2519a602 WC	348	dev = __dev_get_by_name(net, indev);
	349	if (!dev)
	350	return -ENODEV;
	351	return dev->ifindex;
1da177e4 LT	352	}
1da177e4 LT	353
2519a602 WC	354	static inline bool
2519a602 WC	355	tcf_match_indev(struct sk_buff *skb, int ifindex)
1da177e4	356	{
2519a602 WC	357	if (!ifindex)
	358	return true;
	359	if (!skb->skb_iif)
	360	return false;
	361	return ifindex == skb->skb_iif;
1da177e4 LT	362	}
	363	#endif /* CONFIG_NET_CLS_IND */
	364
	365	#endif