[mirror_ubuntu-hirsute-kernel.git] / include / net / act_api.h

#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 hlist_node		tcfc_head;
	u32				tcfc_index;
	int				tcfc_refcnt;
	int				tcfc_bindcnt;
	u32				tcfc_capab;
	int				tcfc_action;
	struct tcf_t			tcfc_tm;
	struct gnet_stats_basic_packed	tcfc_bstats;
	struct gnet_stats_queue		tcfc_qstats;
	struct gnet_stats_rate_est64	tcfc_rate_est;
	spinlock_t			tcfc_lock;
	struct rcu_head			tcfc_rcu;
};
#define tcf_head	common.tcfc_head
#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_lock	common.tcfc_lock
#define tcf_rcu		common.tcfc_rcu

struct tcf_hashinfo {
	struct hlist_head	*htab;
	unsigned int		hmask;
	spinlock_t		lock;
};

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

static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
{
	int i;

	spin_lock_init(&hf->lock);
	hf->hmask = mask;
	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
			   GFP_KERNEL);
	if (!hf->htab)
		return -ENOMEM;
	for (i = 0; i < mask + 1; i++)
		INIT_HLIST_HEAD(&hf->htab[i]);
	return 0;
}

static inline void tcf_hashinfo_destroy(struct tcf_hashinfo *hf)
{
	kfree(hf->htab);
}

#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;
	const struct tc_action_ops	*ops;
	__u32			type; /* for backward compat(TCA_OLD_COMPAT) */
	__u32			order;
	struct list_head	list;
};

#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 *, const struct tc_action *, struct tcf_result *);
	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 net *net, struct nlattr *nla,
			struct nlattr *est, struct tc_action *act, int ovr,
			int bind);
	int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
};

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

int tcf_register_action(struct tc_action_ops *a);
int tcf_unregister_action(struct tc_action_ops *a);
void tcf_action_destroy(struct list_head *actions, int bind);
int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
		    struct tcf_result *res);
int tcf_action_init(struct net *net, struct nlattr *nla,
				  struct nlattr *est, char *n, int ovr,
				  int bind, struct list_head *);
struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
				    struct nlattr *est, char *n, int ovr,
				    int bind);
int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
#endif /* CONFIG_NET_CLS_ACT */
#endif
Commit	Line	Data
1da177e4 LT	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
e9ce1cd3	11	struct tcf_common {
89819dc0	12	struct hlist_node tcfc_head;
e9ce1cd3 DM	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;
c1a8f1f1	19	struct gnet_stats_basic_packed tcfc_bstats;
e9ce1cd3	20	struct gnet_stats_queue tcfc_qstats;
45203a3b	21	struct gnet_stats_rate_est64 tcfc_rate_est;
e9ce1cd3	22	spinlock_t tcfc_lock;
c7de2cf0	23	struct rcu_head tcfc_rcu;
e9ce1cd3	24	};
89819dc0	25	#define tcf_head common.tcfc_head
e9ce1cd3 DM	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
e9ce1cd3	35	#define tcf_lock common.tcfc_lock
c7de2cf0	36	#define tcf_rcu common.tcfc_rcu
e9ce1cd3	37
e9ce1cd3	38	struct tcf_hashinfo {
89819dc0	39	struct hlist_head *htab;
e9ce1cd3	40	unsigned int hmask;
89819dc0	41	spinlock_t lock;
e9ce1cd3 DM	42	};
	43
	44	static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
	45	{
	46	return index & hmask;
	47	}
1da177e4	48
369ba567 WC	49	static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
369ba567 WC	50	{
89819dc0 WC	51	int i;
	52
	53	spin_lock_init(&hf->lock);
369ba567	54	hf->hmask = mask;
89819dc0	55	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
369ba567 WC	56	GFP_KERNEL);
	57	if (!hf->htab)
	58	return -ENOMEM;
89819dc0 WC	59	for (i = 0; i < mask + 1; i++)
89819dc0 WC	60	INIT_HLIST_HEAD(&hf->htab[i]);
369ba567 WC	61	return 0;
	62	}
	63
	64	static inline void tcf_hashinfo_destroy(struct tcf_hashinfo *hf)
	65	{
	66	kfree(hf->htab);
	67	}
	68
1da177e4 LT	69	#ifdef CONFIG_NET_CLS_ACT
	70
	71	#define ACT_P_CREATED 1
	72	#define ACT_P_DELETED 1
	73
e9ce1cd3 DM	74	struct tcf_act_hdr {
e9ce1cd3 DM	75	struct tcf_common common;
1da177e4 LT	76	};
1da177e4 LT	77
e9ce1cd3 DM	78	struct tc_action {
e9ce1cd3 DM	79	void *priv;
dc7f9f6e	80	const struct tc_action_ops *ops;
e9ce1cd3 DM	81	__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
e9ce1cd3 DM	82	__u32 order;
33be6271	83	struct list_head list;
1da177e4 LT	84	};
	85
	86	#define TCA_CAP_NONE 0
e9ce1cd3	87	struct tc_action_ops {
1da177e4	88	struct tc_action_ops *next;
e9ce1cd3	89	struct tcf_hashinfo *hinfo;
1da177e4 LT	90	char kind[IFNAMSIZ];
	91	__u32 type; /* TBD to match kind */
	92	__u32 capab; /* capabilities includes 4 bit version */
	93	struct module *owner;
dc7f9f6e	94	int (act)(struct sk_buff , const struct tc_action , struct tcf_result );
e9ce1cd3	95	int (dump)(struct sk_buff , struct tc_action *, int, int);
1da177e4	96	int (cleanup)(struct tc_action , int bind);
e9ce1cd3	97	int (lookup)(struct tc_action , u32);
c1b52739 BL	98	int (init)(struct net net, struct nlattr *nla,
	99	struct nlattr est, struct tc_action act, int ovr,
	100	int bind);
e9ce1cd3	101	int (walk)(struct sk_buff , struct netlink_callback , int, struct tc_action );
1da177e4 LT	102	};
1da177e4 LT	103
5c15257f JP	104	struct tcf_common tcf_hash_lookup(u32 index, struct tcf_hashinfo hinfo);
	105	void tcf_hash_destroy(struct tcf_common p, struct tcf_hashinfo hinfo);
	106	int tcf_hash_release(struct tcf_common *p, int bind,
	107	struct tcf_hashinfo *hinfo);
	108	int tcf_generic_walker(struct sk_buff skb, struct netlink_callback cb,
	109	int type, struct tc_action *a);
	110	u32 tcf_hash_new_index(u32 idx_gen, struct tcf_hashinfo hinfo);
	111	int tcf_hash_search(struct tc_action *a, u32 index);
	112	struct tcf_common tcf_hash_check(u32 index, struct tc_action a,
	113	int bind, struct tcf_hashinfo *hinfo);
	114	struct tcf_common tcf_hash_create(u32 index, struct nlattr est,
	115	struct tc_action *a, int size,
	116	int bind, u32 *idx_gen,
	117	struct tcf_hashinfo *hinfo);
	118	void tcf_hash_insert(struct tcf_common p, struct tcf_hashinfo hinfo);
e9ce1cd3	119
5c15257f JP	120	int tcf_register_action(struct tc_action_ops *a);
5c15257f JP	121	int tcf_unregister_action(struct tc_action_ops *a);
33be6271 WC	122	void tcf_action_destroy(struct list_head *actions, int bind);
33be6271 WC	123	int tcf_action_exec(struct sk_buff skb, const struct list_head actions,
5c15257f	124	struct tcf_result *res);
33be6271	125	int tcf_action_init(struct net net, struct nlattr nla,
5c15257f	126	struct nlattr est, char n, int ovr,
33be6271	127	int bind, struct list_head *);
5c15257f JP	128	struct tc_action tcf_action_init_1(struct net net, struct nlattr *nla,
	129	struct nlattr est, char n, int ovr,
	130	int bind);
33be6271	131	int tcf_action_dump(struct sk_buff skb, struct list_head , int, int);
5c15257f JP	132	int tcf_action_dump_old(struct sk_buff skb, struct tc_action a, int, int);
	133	int tcf_action_dump_1(struct sk_buff skb, struct tc_action a, int, int);
	134	int tcf_action_copy_stats(struct sk_buff , struct tc_action , int);
1da177e4	135	#endif /* CONFIG_NET_CLS_ACT */
1da177e4	136	#endif