[linux-2.6-block.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)
{
	return xchg(clp, 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_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;
	struct net		*net;
};

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 net *net, void *,
					  int, struct tcf_ematch *);
	int			(*match)(struct sk_buff *, struct tcf_ematch *,
					 struct tcf_pkt_info *);
	void			(*destroy)(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_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(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 */

struct tc_cls_u32_knode {
	struct tcf_exts *exts;
	struct tc_u32_sel *sel;
	u32 handle;
	u32 val;
	u32 mask;
	u32 link_handle;
	u8 fshift;
};

struct tc_cls_u32_hnode {
	u32 handle;
	u32 prio;
	unsigned int divisor;
};

enum tc_clsu32_command {
	TC_CLSU32_NEW_KNODE,
	TC_CLSU32_REPLACE_KNODE,
	TC_CLSU32_DELETE_KNODE,
	TC_CLSU32_NEW_HNODE,
	TC_CLSU32_REPLACE_HNODE,
	TC_CLSU32_DELETE_HNODE,
};

struct tc_cls_u32_offload {
	/* knode values */
	enum tc_clsu32_command command;
	union {
		struct tc_cls_u32_knode knode;
		struct tc_cls_u32_hnode hnode;
	};
};

static inline bool tc_should_offload(struct net_device *dev)
{
	return dev->netdev_ops->ndo_setup_tc;
}

#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	{
a0efb80c	23	return xchg(clp, cl);
1da177e4 LT	24	}
	25
	26	static inline unsigned long
	27	cls_set_class(struct tcf_proto tp, unsigned long clp,
	28	unsigned long cl)
	29	{
	30	unsigned long old_cl;
	31
	32	tcf_tree_lock(tp);
	33	old_cl = __cls_set_class(clp, cl);
	34	tcf_tree_unlock(tp);
	35
	36	return old_cl;
	37	}
	38
	39	static inline void
	40	tcf_bind_filter(struct tcf_proto tp, struct tcf_result r, unsigned long base)
	41	{
	42	unsigned long cl;
	43
	44	cl = tp->q->ops->cl_ops->bind_tcf(tp->q, base, r->classid);
	45	cl = cls_set_class(tp, &r->class, cl);
	46	if (cl)
	47	tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
	48	}
	49
	50	static inline void
	51	tcf_unbind_filter(struct tcf_proto tp, struct tcf_result r)
	52	{
	53	unsigned long cl;
	54
	55	if ((cl = __cls_set_class(&r->class, 0)) != 0)
	56	tp->q->ops->cl_ops->unbind_tcf(tp->q, cl);
	57	}
	58
fd2c3ef7	59	struct tcf_exts {
1da177e4	60	#ifdef CONFIG_NET_CLS_ACT
33be6271 WC	61	__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
33be6271 WC	62	struct list_head actions;
1da177e4	63	#endif
5da57f42 WC	64	/* Map to export classifier specific extension TLV types to the
	65	* generic extensions API. Unsupported extensions must be set to 0.
	66	*/
1da177e4 LT	67	int action;
	68	int police;
	69	};
	70
5da57f42	71	static inline void tcf_exts_init(struct tcf_exts *exts, int action, int police)
33be6271 WC	72	{
33be6271 WC	73	#ifdef CONFIG_NET_CLS_ACT
5da57f42	74	exts->type = 0;
33be6271 WC	75	INIT_LIST_HEAD(&exts->actions);
33be6271 WC	76	#endif
5da57f42 WC	77	exts->action = action;
5da57f42 WC	78	exts->police = police;
33be6271 WC	79	}
33be6271 WC	80
1da177e4 LT	81	/**
	82	* tcf_exts_is_predicative - check if a predicative extension is present
	83	* @exts: tc filter extensions handle
	84	*
	85	* Returns 1 if a predicative extension is present, i.e. an extension which
	86	* might cause further actions and thus overrule the regular tcf_result.
	87	*/
	88	static inline int
	89	tcf_exts_is_predicative(struct tcf_exts *exts)
	90	{
	91	#ifdef CONFIG_NET_CLS_ACT
33be6271	92	return !list_empty(&exts->actions);
1da177e4 LT	93	#else
	94	return 0;
	95	#endif
	96	}
	97
	98	/**
	99	* tcf_exts_is_available - check if at least one extension is present
	100	* @exts: tc filter extensions handle
	101	*
	102	* Returns 1 if at least one extension is present.
	103	*/
	104	static inline int
	105	tcf_exts_is_available(struct tcf_exts *exts)
	106	{
	107	/* All non-predicative extensions must be added here. */
	108	return tcf_exts_is_predicative(exts);
	109	}
	110
	111	/**
	112	* tcf_exts_exec - execute tc filter extensions
	113	* @skb: socket buffer
	114	* @exts: tc filter extensions handle
	115	* @res: desired result
	116	*
	117	* Executes all configured extensions. Returns 0 on a normal execution,
	118	* a negative number if the filter must be considered unmatched or
	119	* a positive action code (TC_ACT_*) which must be returned to the
	120	* underlying layer.
	121	*/
	122	static inline int
	123	tcf_exts_exec(struct sk_buff skb, struct tcf_exts exts,
	124	struct tcf_result *res)
	125	{
	126	#ifdef CONFIG_NET_CLS_ACT
33be6271 WC	127	if (!list_empty(&exts->actions))
33be6271 WC	128	return tcf_action_exec(skb, &exts->actions, res);
1da177e4	129	#endif
1da177e4 LT	130	return 0;
	131	}
	132
5c15257f JP	133	int tcf_exts_validate(struct net net, struct tcf_proto tp,
5c15257f JP	134	struct nlattr *tb, struct nlattr rate_tlv,
2f7ef2f8	135	struct tcf_exts *exts, bool ovr);
18d0264f	136	void tcf_exts_destroy(struct tcf_exts *exts);
5c15257f JP	137	void tcf_exts_change(struct tcf_proto tp, struct tcf_exts dst,
5c15257f JP	138	struct tcf_exts *src);
5da57f42 WC	139	int tcf_exts_dump(struct sk_buff skb, struct tcf_exts exts);
5da57f42 WC	140	int tcf_exts_dump_stats(struct sk_buff skb, struct tcf_exts exts);
1da177e4 LT	141
	142	/**
	143	* struct tcf_pkt_info - packet information
	144	*/
fd2c3ef7	145	struct tcf_pkt_info {
1da177e4 LT	146	unsigned char * ptr;
	147	int nexthdr;
	148	};
	149
	150	#ifdef CONFIG_NET_EMATCH
	151
	152	struct tcf_ematch_ops;
	153
	154	/**
	155	* struct tcf_ematch - extended match (ematch)
	156	*
	157	* @matchid: identifier to allow userspace to reidentify a match
	158	* @flags: flags specifying attributes and the relation to other matches
	159	* @ops: the operations lookup table of the corresponding ematch module
	160	* @datalen: length of the ematch specific configuration data
	161	* @data: ematch specific data
	162	*/
fd2c3ef7	163	struct tcf_ematch {
1da177e4 LT	164	struct tcf_ematch_ops * ops;
	165	unsigned long data;
	166	unsigned int datalen;
	167	u16 matchid;
	168	u16 flags;
82a470f1	169	struct net *net;
1da177e4 LT	170	};
	171
	172	static inline int tcf_em_is_container(struct tcf_ematch *em)
	173	{
	174	return !em->ops;
	175	}
	176
	177	static inline int tcf_em_is_simple(struct tcf_ematch *em)
	178	{
	179	return em->flags & TCF_EM_SIMPLE;
	180	}
	181
	182	static inline int tcf_em_is_inverted(struct tcf_ematch *em)
	183	{
	184	return em->flags & TCF_EM_INVERT;
	185	}
	186
	187	static inline int tcf_em_last_match(struct tcf_ematch *em)
	188	{
	189	return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
	190	}
	191
	192	static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
	193	{
	194	if (tcf_em_last_match(em))
	195	return 1;
	196
	197	if (result == 0 && em->flags & TCF_EM_REL_AND)
	198	return 1;
	199
	200	if (result != 0 && em->flags & TCF_EM_REL_OR)
	201	return 1;
	202
	203	return 0;
	204	}
	205
	206	/**
	207	* struct tcf_ematch_tree - ematch tree handle
	208	*
	209	* @hdr: ematch tree header supplied by userspace
	210	* @matches: array of ematches
	211	*/
fd2c3ef7	212	struct tcf_ematch_tree {
1da177e4 LT	213	struct tcf_ematch_tree_hdr hdr;
	214	struct tcf_ematch * matches;
	215
	216	};
	217
	218	/**
	219	* struct tcf_ematch_ops - ematch module operations
	220	*
	221	* @kind: identifier (kind) of this ematch module
	222	* @datalen: length of expected configuration data (optional)
	223	* @change: called during validation (optional)
	224	* @match: called during ematch tree evaluation, must return 1/0
	225	* @destroy: called during destroyage (optional)
	226	* @dump: called during dumping process (optional)
	227	* @owner: owner, must be set to THIS_MODULE
	228	* @link: link to previous/next ematch module (internal use)
	229	*/
fd2c3ef7	230	struct tcf_ematch_ops {
1da177e4 LT	231	int kind;
1da177e4 LT	232	int datalen;
82a470f1	233	int (change)(struct net net, void *,
1da177e4 LT	234	int, struct tcf_ematch *);
	235	int (match)(struct sk_buff , struct tcf_ematch *,
	236	struct tcf_pkt_info *);
82a470f1	237	void (destroy)(struct tcf_ematch );
1da177e4 LT	238	int (dump)(struct sk_buff , struct tcf_ematch *);
	239	struct module *owner;
	240	struct list_head link;
	241	};
	242
5c15257f JP	243	int tcf_em_register(struct tcf_ematch_ops *);
	244	void tcf_em_unregister(struct tcf_ematch_ops *);
	245	int tcf_em_tree_validate(struct tcf_proto , struct nlattr ,
	246	struct tcf_ematch_tree *);
82a470f1	247	void tcf_em_tree_destroy(struct tcf_ematch_tree *);
5c15257f JP	248	int tcf_em_tree_dump(struct sk_buff , struct tcf_ematch_tree , int);
	249	int __tcf_em_tree_match(struct sk_buff , struct tcf_ematch_tree ,
	250	struct tcf_pkt_info *);
1da177e4 LT	251
	252	/**
	253	* tcf_em_tree_change - replace ematch tree of a running classifier
	254	*
	255	* @tp: classifier kind handle
	256	* @dst: destination ematch tree variable
	257	* @src: source ematch tree (temporary tree from tcf_em_tree_validate)
	258	*
	259	* This functions replaces the ematch tree in @dst with the ematch
	260	* tree in @src. The classifier in charge of the ematch tree may be
	261	* running.
	262	*/
	263	static inline void tcf_em_tree_change(struct tcf_proto *tp,
	264	struct tcf_ematch_tree *dst,
	265	struct tcf_ematch_tree *src)
	266	{
	267	tcf_tree_lock(tp);
	268	memcpy(dst, src, sizeof(*dst));
	269	tcf_tree_unlock(tp);
	270	}
	271
	272	/**
	273	* tcf_em_tree_match - evaulate an ematch tree
	274	*
	275	* @skb: socket buffer of the packet in question
	276	* @tree: ematch tree to be used for evaluation
	277	* @info: packet information examined by classifier
	278	*
	279	* This function matches @skb against the ematch tree in @tree by going
	280	* through all ematches respecting their logic relations returning
	281	* as soon as the result is obvious.
	282	*
	283	* Returns 1 if the ematch tree as-one matches, no ematches are configured
	284	* or ematch is not enabled in the kernel, otherwise 0 is returned.
	285	*/
	286	static inline int tcf_em_tree_match(struct sk_buff *skb,
	287	struct tcf_ematch_tree *tree,
	288	struct tcf_pkt_info *info)
	289	{
	290	if (tree->hdr.nmatches)
	291	return __tcf_em_tree_match(skb, tree, info);
	292	else
	293	return 1;
	294	}
	295
db3d99c0 PM	296	#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
db3d99c0 PM	297
1da177e4 LT	298	#else /* CONFIG_NET_EMATCH */
1da177e4 LT	299
fd2c3ef7	300	struct tcf_ematch_tree {
1da177e4 LT	301	};
	302
	303	#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
82a470f1	304	#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
1da177e4 LT	305	#define tcf_em_tree_dump(skb, t, tlv) (0)
	306	#define tcf_em_tree_change(tp, dst, src) do { } while(0)
	307	#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
	308
	309	#endif /* CONFIG_NET_EMATCH */
	310
	311	static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
	312	{
	313	switch (layer) {
	314	case TCF_LAYER_LINK:
	315	return skb->data;
	316	case TCF_LAYER_NETWORK:
d56f90a7	317	return skb_network_header(skb);
1da177e4	318	case TCF_LAYER_TRANSPORT:
9c70220b	319	return skb_transport_header(skb);
1da177e4 LT	320	}
	321
	322	return NULL;
	323	}
	324
eddc9ec5 ACM	325	static inline int tcf_valid_offset(const struct sk_buff *skb,
eddc9ec5 ACM	326	const unsigned char *ptr, const int len)
1da177e4	327	{
da521b2c DM	328	return likely((ptr + len) <= skb_tail_pointer(skb) &&
	329	ptr >= skb->head &&
	330	(ptr <= (ptr + len)));
1da177e4 LT	331	}
	332
	333	#ifdef CONFIG_NET_CLS_IND
0eeb8ffc DL	334	#include <net/net_namespace.h>
0eeb8ffc DL	335
1da177e4	336	static inline int
2519a602	337	tcf_change_indev(struct net net, struct nlattr indev_tlv)
1da177e4	338	{
2519a602 WC	339	char indev[IFNAMSIZ];
	340	struct net_device *dev;
	341
add93b61	342	if (nla_strlcpy(indev, indev_tlv, IFNAMSIZ) >= IFNAMSIZ)
1da177e4	343	return -EINVAL;
2519a602 WC	344	dev = __dev_get_by_name(net, indev);
	345	if (!dev)
	346	return -ENODEV;
	347	return dev->ifindex;
1da177e4 LT	348	}
1da177e4 LT	349
2519a602 WC	350	static inline bool
2519a602 WC	351	tcf_match_indev(struct sk_buff *skb, int ifindex)
1da177e4	352	{
2519a602 WC	353	if (!ifindex)
	354	return true;
	355	if (!skb->skb_iif)
	356	return false;
	357	return ifindex == skb->skb_iif;
1da177e4 LT	358	}
	359	#endif /* CONFIG_NET_CLS_IND */
	360
a1b7c5fd JF	361	struct tc_cls_u32_knode {
a1b7c5fd JF	362	struct tcf_exts *exts;
e014860e	363	struct tc_u32_sel *sel;
a1b7c5fd JF	364	u32 handle;
	365	u32 val;
	366	u32 mask;
	367	u32 link_handle;
e014860e	368	u8 fshift;
a1b7c5fd JF	369	};
	370
	371	struct tc_cls_u32_hnode {
	372	u32 handle;
	373	u32 prio;
	374	unsigned int divisor;
	375	};
	376
	377	enum tc_clsu32_command {
	378	TC_CLSU32_NEW_KNODE,
	379	TC_CLSU32_REPLACE_KNODE,
	380	TC_CLSU32_DELETE_KNODE,
	381	TC_CLSU32_NEW_HNODE,
	382	TC_CLSU32_REPLACE_HNODE,
	383	TC_CLSU32_DELETE_HNODE,
	384	};
	385
	386	struct tc_cls_u32_offload {
	387	/* knode values */
	388	enum tc_clsu32_command command;
	389	union {
	390	struct tc_cls_u32_knode knode;
	391	struct tc_cls_u32_hnode hnode;
	392	};
	393	};
	394
6843e7a2 JF	395	static inline bool tc_should_offload(struct net_device *dev)
	396	{
	397	return dev->netdev_ops->ndo_setup_tc;
	398	}
	399
1da177e4	400	#endif