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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/net/act_api.h
10817 views
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#ifndef __NET_ACT_API_H

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#define __NET_ACT_API_H

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/*

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 * Public police action API for classifiers/qdiscs

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 */

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#include <net/sch_generic.h>

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#include <net/pkt_sched.h>

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struct tcf_common {

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	struct tcf_common		*tcfc_next;

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	u32				tcfc_index;

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	int				tcfc_refcnt;

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	int				tcfc_bindcnt;

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	u32				tcfc_capab;

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	int				tcfc_action;

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	struct tcf_t			tcfc_tm;

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	struct gnet_stats_basic_packed	tcfc_bstats;

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	struct gnet_stats_queue		tcfc_qstats;

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	struct gnet_stats_rate_est	tcfc_rate_est;

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	spinlock_t			tcfc_lock;

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	struct rcu_head			tcfc_rcu;

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};

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#define tcf_next	common.tcfc_next

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#define tcf_index	common.tcfc_index

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#define tcf_refcnt	common.tcfc_refcnt

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#define tcf_bindcnt	common.tcfc_bindcnt

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#define tcf_capab	common.tcfc_capab

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#define tcf_action	common.tcfc_action

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#define tcf_tm		common.tcfc_tm

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#define tcf_bstats	common.tcfc_bstats

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#define tcf_qstats	common.tcfc_qstats

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#define tcf_rate_est	common.tcfc_rate_est

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#define tcf_lock	common.tcfc_lock

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#define tcf_rcu		common.tcfc_rcu

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struct tcf_police {

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	struct tcf_common	common;

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	int			tcfp_result;

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	u32			tcfp_ewma_rate;

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	u32			tcfp_burst;

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	u32			tcfp_mtu;

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	u32			tcfp_toks;

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	u32			tcfp_ptoks;

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	psched_time_t		tcfp_t_c;

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	struct qdisc_rate_table	*tcfp_R_tab;

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	struct qdisc_rate_table	*tcfp_P_tab;

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};

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#define to_police(pc)	\

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	container_of(pc, struct tcf_police, common)

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struct tcf_hashinfo {

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	struct tcf_common	**htab;

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	unsigned int		hmask;

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	rwlock_t		*lock;

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};

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static inline unsigned int tcf_hash(u32 index, unsigned int hmask)

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{

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	return index & hmask;

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}

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#ifdef CONFIG_NET_CLS_ACT

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#define ACT_P_CREATED 1

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#define ACT_P_DELETED 1

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struct tcf_act_hdr {

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	struct tcf_common	common;

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};

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struct tc_action {

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	void			*priv;

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	struct tc_action_ops	*ops;

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	__u32			type; /* for backward compat(TCA_OLD_COMPAT) */

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	__u32			order;

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	struct tc_action	*next;

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};

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#define TCA_CAP_NONE 0

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struct tc_action_ops {

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	struct tc_action_ops *next;

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	struct tcf_hashinfo *hinfo;

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	char    kind[IFNAMSIZ];

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	__u32   type; /* TBD to match kind */

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	__u32 	capab;  /* capabilities includes 4 bit version */

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	struct module		*owner;

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	int     (*act)(struct sk_buff *, struct tc_action *, struct tcf_result *);

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	int     (*get_stats)(struct sk_buff *, struct tc_action *);

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	int     (*dump)(struct sk_buff *, struct tc_action *, int, int);

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	int     (*cleanup)(struct tc_action *, int bind);

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	int     (*lookup)(struct tc_action *, u32);

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	int     (*init)(struct nlattr *, struct nlattr *, struct tc_action *, int , int);

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	int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);

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};

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extern struct tcf_common *tcf_hash_lookup(u32 index,

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					  struct tcf_hashinfo *hinfo);

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extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);

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extern int tcf_hash_release(struct tcf_common *p, int bind,

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			    struct tcf_hashinfo *hinfo);

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extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,

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			      int type, struct tc_action *a);

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extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);

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extern int tcf_hash_search(struct tc_action *a, u32 index);

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extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,

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					 int bind, struct tcf_hashinfo *hinfo);

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extern struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,

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					  struct tc_action *a, int size,

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					  int bind, u32 *idx_gen,

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					  struct tcf_hashinfo *hinfo);

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extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);

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extern int tcf_register_action(struct tc_action_ops *a);

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extern int tcf_unregister_action(struct tc_action_ops *a);

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extern void tcf_action_destroy(struct tc_action *a, int bind);

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extern int tcf_action_exec(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res);

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extern struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est, char *n, int ovr, int bind);

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extern struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est, char *n, int ovr, int bind);

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extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);

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extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);

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extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);

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extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);

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#endif /* CONFIG_NET_CLS_ACT */

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#endif

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