summaryrefslogtreecommitdiff
path: root/include/net/act_api.h
blob: 8b06c2f3657f3b4b4923c7a856d278778f8f3138 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
#ifndef __NET_ACT_API_H
#define __NET_ACT_API_H

/*
 * Public police action API for classifiers/qdiscs
 */

#include <net/sch_generic.h>
#include <net/pkt_sched.h>

struct tcf_common {
	struct tcf_common		*tcfc_next;
	u32				tcfc_index;
	int				tcfc_refcnt;
	int				tcfc_bindcnt;
	u32				tcfc_capab;
	int				tcfc_action;
	struct tcf_t			tcfc_tm;
	struct gnet_stats_basic		tcfc_bstats;
	struct gnet_stats_queue		tcfc_qstats;
	struct gnet_stats_rate_est	tcfc_rate_est;
	spinlock_t			*tcfc_stats_lock;
	spinlock_t			tcfc_lock;
};
#define tcf_next	common.tcfc_next
#define tcf_index	common.tcfc_index
#define tcf_refcnt	common.tcfc_refcnt
#define tcf_bindcnt	common.tcfc_bindcnt
#define tcf_capab	common.tcfc_capab
#define tcf_action	common.tcfc_action
#define tcf_tm		common.tcfc_tm
#define tcf_bstats	common.tcfc_bstats
#define tcf_qstats	common.tcfc_qstats
#define tcf_rate_est	common.tcfc_rate_est
#define tcf_stats_lock	common.tcfc_stats_lock
#define tcf_lock	common.tcfc_lock

struct tcf_police {
	struct tcf_common	common;
	int			tcfp_result;
	u32			tcfp_ewma_rate;
	u32			tcfp_burst;
	u32			tcfp_mtu;
	u32			tcfp_toks;
	u32			tcfp_ptoks;
	psched_time_t		tcfp_t_c;
	struct qdisc_rate_table	*tcfp_R_tab;
	struct qdisc_rate_table	*tcfp_P_tab;
};
#define to_police(pc)	\
	container_of(pc, struct tcf_police, common)

struct tcf_hashinfo {
	struct tcf_common	**htab;
	unsigned int		hmask;
	rwlock_t		*lock;
};

static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
{
	return index & hmask;
}

#ifdef CONFIG_NET_CLS_ACT

#define ACT_P_CREATED 1
#define ACT_P_DELETED 1

struct tcf_act_hdr {
	struct tcf_common	common;
};

struct tc_action {
	void			*priv;
	struct tc_action_ops	*ops;
	__u32			type; /* for backward compat(TCA_OLD_COMPAT) */
	__u32			order;
	struct tc_action	*next;
};

#define TCA_CAP_NONE 0
struct tc_action_ops {
	struct tc_action_ops *next;
	struct tcf_hashinfo *hinfo;
	char    kind[IFNAMSIZ];
	__u32   type; /* TBD to match kind */
	__u32 	capab;  /* capabilities includes 4 bit version */
	struct module		*owner;
	int     (*act)(struct sk_buff *, struct tc_action *, struct tcf_result *);
	int     (*get_stats)(struct sk_buff *, struct tc_action *);
	int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
	int     (*cleanup)(struct tc_action *, int bind);
	int     (*lookup)(struct tc_action *, u32);
	int     (*init)(struct rtattr *, struct rtattr *, struct tc_action *, int , int);
	int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
};

extern struct tcf_common *tcf_hash_lookup(u32 index,
					  struct tcf_hashinfo *hinfo);
extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
extern int tcf_hash_release(struct tcf_common *p, int bind,
			    struct tcf_hashinfo *hinfo);
extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
			      int type, struct tc_action *a);
extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
extern int tcf_hash_search(struct tc_action *a, u32 index);
extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
					 int bind, struct tcf_hashinfo *hinfo);
extern struct tcf_common *tcf_hash_create(u32 index, struct rtattr *est,
					  struct tc_action *a, int size,
					  int bind, u32 *idx_gen,
					  struct tcf_hashinfo *hinfo);
extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);

extern int tcf_register_action(struct tc_action_ops *a);
extern int tcf_unregister_action(struct tc_action_ops *a);
extern void tcf_action_destroy(struct tc_action *a, int bind);
extern int tcf_action_exec(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res);
extern struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
extern struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
#endif /* CONFIG_NET_CLS_ACT */

extern int tcf_police(struct sk_buff *skb, struct tcf_police *p);
extern void tcf_police_destroy(struct tcf_police *p);
extern struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est);
extern int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p);
extern int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *p);

static inline int
tcf_police_release(struct tcf_police *p, int bind)
{
	int ret = 0;
#ifdef CONFIG_NET_CLS_ACT
	if (p) {
		if (bind)
			p->tcf_bindcnt--;

		p->tcf_refcnt--;
		if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
			tcf_police_destroy(p);
			ret = 1;
		}
	}
#else
	if (p && --p->tcf_refcnt == 0)
		tcf_police_destroy(p);

#endif /* CONFIG_NET_CLS_ACT */
	return ret;
}

#endif