act_api.h revision 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 
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
11#define tca_gen(name) \
12struct tcf_##name *next; \
13	u32 index; \
14	int refcnt; \
15	int bindcnt; \
16	u32 capab; \
17	int action; \
18	struct tcf_t tm; \
19	struct gnet_stats_basic bstats; \
20	struct gnet_stats_queue qstats; \
21	struct gnet_stats_rate_est rate_est; \
22	spinlock_t *stats_lock; \
23	spinlock_t lock
24
25struct tcf_police
26{
27	tca_gen(police);
28	int		result;
29	u32		ewma_rate;
30	u32		burst;
31	u32		mtu;
32	u32		toks;
33	u32		ptoks;
34	psched_time_t	t_c;
35	struct qdisc_rate_table *R_tab;
36	struct qdisc_rate_table *P_tab;
37};
38
39#ifdef CONFIG_NET_CLS_ACT
40
41#define ACT_P_CREATED 1
42#define ACT_P_DELETED 1
43
44struct tcf_act_hdr
45{
46	tca_gen(act_hdr);
47};
48
49struct tc_action
50{
51	void *priv;
52	struct tc_action_ops *ops;
53	__u32   type;   /* for backward compat(TCA_OLD_COMPAT) */
54	__u32   order;
55	struct tc_action *next;
56};
57
58#define TCA_CAP_NONE 0
59struct tc_action_ops
60{
61	struct tc_action_ops *next;
62	char    kind[IFNAMSIZ];
63	__u32   type; /* TBD to match kind */
64	__u32 	capab;  /* capabilities includes 4 bit version */
65	struct module		*owner;
66	int     (*act)(struct sk_buff **, struct tc_action *);
67	int     (*get_stats)(struct sk_buff *, struct tc_action *);
68	int     (*dump)(struct sk_buff *, struct tc_action *,int , int);
69	int     (*cleanup)(struct tc_action *, int bind);
70	int     (*lookup)(struct tc_action *, u32 );
71	int     (*init)(struct rtattr *,struct rtattr *,struct tc_action *, int , int );
72	int     (*walk)(struct sk_buff *, struct netlink_callback *, int , struct tc_action *);
73};
74
75extern int tcf_register_action(struct tc_action_ops *a);
76extern int tcf_unregister_action(struct tc_action_ops *a);
77extern void tcf_action_destroy(struct tc_action *a, int bind);
78extern int tcf_action_exec(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res);
79extern struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
80extern struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
81extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
82extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
83extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
84extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
85#endif /* CONFIG_NET_CLS_ACT */
86
87extern int tcf_police(struct sk_buff *skb, struct tcf_police *p);
88extern void tcf_police_destroy(struct tcf_police *p);
89extern struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est);
90extern int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p);
91extern int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *p);
92
93static inline int
94tcf_police_release(struct tcf_police *p, int bind)
95{
96	int ret = 0;
97#ifdef CONFIG_NET_CLS_ACT
98	if (p) {
99		if (bind) {
100			 p->bindcnt--;
101		}
102		p->refcnt--;
103		if (p->refcnt <= 0 && !p->bindcnt) {
104			tcf_police_destroy(p);
105			ret = 1;
106		}
107	}
108#else
109	if (p && --p->refcnt == 0)
110		tcf_police_destroy(p);
111
112#endif /* CONFIG_NET_CLS_ACT */
113	return ret;
114}
115
116#endif
117