1#ifndef __NET_ACT_API_H
2#define __NET_ACT_API_H
3
4/*
5 * Public police action API for classifiers/qdiscs
6 */
7
8#include <net/sch_generic.h>
9#include <net/pkt_sched.h>
10
11struct tcf_common {
12	struct tcf_common		*tcfc_next;
13	u32				tcfc_index;
14	int				tcfc_refcnt;
15	int				tcfc_bindcnt;
16	u32				tcfc_capab;
17	int				tcfc_action;
18	struct tcf_t			tcfc_tm;
19	struct gnet_stats_basic_packed	tcfc_bstats;
20	struct gnet_stats_queue		tcfc_qstats;
21	struct gnet_stats_rate_est	tcfc_rate_est;
22	spinlock_t			tcfc_lock;
23	struct rcu_head			tcfc_rcu;
24};
25#define tcf_next	common.tcfc_next
26#define tcf_index	common.tcfc_index
27#define tcf_refcnt	common.tcfc_refcnt
28#define tcf_bindcnt	common.tcfc_bindcnt
29#define tcf_capab	common.tcfc_capab
30#define tcf_action	common.tcfc_action
31#define tcf_tm		common.tcfc_tm
32#define tcf_bstats	common.tcfc_bstats
33#define tcf_qstats	common.tcfc_qstats
34#define tcf_rate_est	common.tcfc_rate_est
35#define tcf_lock	common.tcfc_lock
36#define tcf_rcu		common.tcfc_rcu
37
38struct tcf_police {
39	struct tcf_common	common;
40	int			tcfp_result;
41	u32			tcfp_ewma_rate;
42	u32			tcfp_burst;
43	u32			tcfp_mtu;
44	u32			tcfp_toks;
45	u32			tcfp_ptoks;
46	psched_time_t		tcfp_t_c;
47	struct qdisc_rate_table	*tcfp_R_tab;
48	struct qdisc_rate_table	*tcfp_P_tab;
49};
50#define to_police(pc)	\
51	container_of(pc, struct tcf_police, common)
52
53struct tcf_hashinfo {
54	struct tcf_common	**htab;
55	unsigned int		hmask;
56	rwlock_t		*lock;
57};
58
59static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
60{
61	return index & hmask;
62}
63
64#ifdef CONFIG_NET_CLS_ACT
65
66#define ACT_P_CREATED 1
67#define ACT_P_DELETED 1
68
69struct tcf_act_hdr {
70	struct tcf_common	common;
71};
72
73struct tc_action {
74	void			*priv;
75	const struct tc_action_ops	*ops;
76	__u32			type; /* for backward compat(TCA_OLD_COMPAT) */
77	__u32			order;
78	struct tc_action	*next;
79};
80
81#define TCA_CAP_NONE 0
82struct tc_action_ops {
83	struct tc_action_ops *next;
84	struct tcf_hashinfo *hinfo;
85	char    kind[IFNAMSIZ];
86	__u32   type; /* TBD to match kind */
87	__u32 	capab;  /* capabilities includes 4 bit version */
88	struct module		*owner;
89	int     (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *);
90	int     (*get_stats)(struct sk_buff *, struct tc_action *);
91	int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
92	int     (*cleanup)(struct tc_action *, int bind);
93	int     (*lookup)(struct tc_action *, u32);
94	int     (*init)(struct nlattr *, struct nlattr *, struct tc_action *, int , int);
95	int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
96};
97
98extern struct tcf_common *tcf_hash_lookup(u32 index,
99					  struct tcf_hashinfo *hinfo);
100extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
101extern int tcf_hash_release(struct tcf_common *p, int bind,
102			    struct tcf_hashinfo *hinfo);
103extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
104			      int type, struct tc_action *a);
105extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
106extern int tcf_hash_search(struct tc_action *a, u32 index);
107extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
108					 int bind, struct tcf_hashinfo *hinfo);
109extern struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,
110					  struct tc_action *a, int size,
111					  int bind, u32 *idx_gen,
112					  struct tcf_hashinfo *hinfo);
113extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
114
115extern int tcf_register_action(struct tc_action_ops *a);
116extern int tcf_unregister_action(struct tc_action_ops *a);
117extern void tcf_action_destroy(struct tc_action *a, int bind);
118extern int tcf_action_exec(struct sk_buff *skb, const struct tc_action *a, struct tcf_result *res);
119extern struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est, char *n, int ovr, int bind);
120extern struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est, char *n, int ovr, int bind);
121extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
122extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
123extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
124extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
125#endif /* CONFIG_NET_CLS_ACT */
126#endif
127