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 hlist_node		tcfc_head;
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_est64	tcfc_rate_est;
22	spinlock_t			tcfc_lock;
23	struct rcu_head			tcfc_rcu;
24};
25#define tcf_head	common.tcfc_head
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_hashinfo {
39	struct hlist_head	*htab;
40	unsigned int		hmask;
41	spinlock_t		lock;
42	u32			index;
43};
44
45static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
46{
47	return index & hmask;
48}
49
50static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
51{
52	int i;
53
54	spin_lock_init(&hf->lock);
55	hf->index = 0;
56	hf->hmask = mask;
57	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
58			   GFP_KERNEL);
59	if (!hf->htab)
60		return -ENOMEM;
61	for (i = 0; i < mask + 1; i++)
62		INIT_HLIST_HEAD(&hf->htab[i]);
63	return 0;
64}
65
66static inline void tcf_hashinfo_destroy(struct tcf_hashinfo *hf)
67{
68	kfree(hf->htab);
69}
70
71#ifdef CONFIG_NET_CLS_ACT
72
73#define ACT_P_CREATED 1
74#define ACT_P_DELETED 1
75
76struct tc_action {
77	void			*priv;
78	const struct tc_action_ops	*ops;
79	__u32			type; /* for backward compat(TCA_OLD_COMPAT) */
80	__u32			order;
81	struct list_head	list;
82};
83
84struct tc_action_ops {
85	struct list_head head;
86	struct tcf_hashinfo *hinfo;
87	char    kind[IFNAMSIZ];
88	__u32   type; /* TBD to match kind */
89	struct module		*owner;
90	int     (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *);
91	int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
92	void	(*cleanup)(struct tc_action *, int bind);
93	int     (*lookup)(struct tc_action *, u32);
94	int     (*init)(struct net *net, struct nlattr *nla,
95			struct nlattr *est, struct tc_action *act, int ovr,
96			int bind);
97	int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
98};
99
100int tcf_hash_search(struct tc_action *a, u32 index);
101void tcf_hash_destroy(struct tc_action *a);
102u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
103int tcf_hash_check(u32 index, struct tc_action *a, int bind);
104int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
105		    int size, int bind);
106void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
107void tcf_hash_insert(struct tc_action *a);
108
109int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
110
111static inline int tcf_hash_release(struct tc_action *a, bool bind)
112{
113	return __tcf_hash_release(a, bind, false);
114}
115
116int tcf_register_action(struct tc_action_ops *a, unsigned int mask);
117int tcf_unregister_action(struct tc_action_ops *a);
118int tcf_action_destroy(struct list_head *actions, int bind);
119int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
120		    struct tcf_result *res);
121int tcf_action_init(struct net *net, struct nlattr *nla,
122				  struct nlattr *est, char *n, int ovr,
123				  int bind, struct list_head *);
124struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
125				    struct nlattr *est, char *n, int ovr,
126				    int bind);
127int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
128int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
129int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
130int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
131#endif /* CONFIG_NET_CLS_ACT */
132#endif
133