include/net/pkt_cls.h - kernel/msm-4.9 - Gitiles

 #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 *);
 };

 extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
 extern 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
 	struct tc_action *action;
 #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;
 };

 /**
  * 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 !!exts->action;
 #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 (exts->action)
 		return tcf_action_exec(skb, exts->action, res);
 #endif
 	return 0;
 }

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

 extern int tcf_em_register(struct tcf_ematch_ops *);
 extern int tcf_em_unregister(struct tcf_ematch_ops *);
 extern int tcf_em_tree_validate(struct tcf_proto *, struct rtattr *,
 				struct tcf_ematch_tree *);
 extern void tcf_em_tree_destroy(struct tcf_proto *, struct tcf_ematch_tree *);
 extern int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
 extern 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 unlikely((ptr + len) < skb_tail_pointer(skb) && ptr > skb->head);
 }

 #ifdef CONFIG_NET_CLS_IND
 static inline int
 tcf_change_indev(struct tcf_proto *tp, char *indev, struct rtattr *indev_tlv)
 {
 	if (rtattr_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->iif)
 			return 0;
 		dev = __dev_get_by_index(skb->iif);
 		if (!dev || strcmp(indev, dev->name))
 			return 0;
 	}

 	return 1;
 }
 #endif /* CONFIG_NET_CLS_IND */

 #endif
	#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 *);
	};

	extern int register_tcf_proto_ops(struct tcf_proto_ops *ops);
	extern 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
	struct tc_action *action;
	#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;
	};

	/**
	* 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 !!exts->action;
	#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 (exts->action)
	return tcf_action_exec(skb, exts->action, res);
	#endif
	return 0;
	}

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

	extern int tcf_em_register(struct tcf_ematch_ops *);
	extern int tcf_em_unregister(struct tcf_ematch_ops *);
	extern int tcf_em_tree_validate(struct tcf_proto , struct rtattr ,
	struct tcf_ematch_tree *);
	extern void tcf_em_tree_destroy(struct tcf_proto , struct tcf_ematch_tree );
	extern int tcf_em_tree_dump(struct sk_buff , struct tcf_ematch_tree , int);
	extern 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 unlikely((ptr + len) < skb_tail_pointer(skb) && ptr > skb->head);
	}

	#ifdef CONFIG_NET_CLS_IND
	static inline int
	tcf_change_indev(struct tcf_proto tp, char indev, struct rtattr *indev_tlv)
	{
	if (rtattr_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->iif)
	return 0;
	dev = __dev_get_by_index(skb->iif);
	if (!dev \|\| strcmp(indev, dev->name))
	return 0;
	}

	return 1;
	}
	#endif /* CONFIG_NET_CLS_IND */

	#endif