[deliverable/linux.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;
	struct gnet_stats_basic_cpu __percpu *cpu_bstats;
	struct gnet_stats_queue __percpu *cpu_qstats;
};
#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;
	u32			index;
};

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->index = 0;
	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;
}

/* Update lastuse only if needed, to avoid dirtying a cache line.
 * We use a temp variable to avoid fetching jiffies twice.
 */
static inline void tcf_lastuse_update(struct tcf_t *tm)
{
	unsigned long now = jiffies;

	if (tm->lastuse != now)
		tm->lastuse = now;
}

#ifdef CONFIG_NET_CLS_ACT

#define ACT_P_CREATED 1
#define ACT_P_DELETED 1

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;
};

struct tc_action_ops {
	struct list_head head;
	struct tcf_hashinfo *hinfo;
	char    kind[IFNAMSIZ];
	__u32   type; /* TBD to match kind */
	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);
	void	(*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 *);
};

int tcf_hash_search(struct tc_action *a, u32 index);
u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
int tcf_hash_check(u32 index, struct tc_action *a, int bind);
int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
		    int size, int bind, bool cpustats);
void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
void tcf_hash_insert(struct tc_action *a);

int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);

static inline int tcf_hash_release(struct tc_action *a, bool bind)
{
	return __tcf_hash_release(a, bind, false);
}

int tcf_register_action(struct tc_action_ops *a, unsigned int mask);
int tcf_unregister_action(struct tc_action_ops *a);
int 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;
519c818e ED	24	struct gnet_stats_basic_cpu __percpu *cpu_bstats;
519c818e ED	25	struct gnet_stats_queue __percpu *cpu_qstats;
e9ce1cd3	26	};
89819dc0	27	#define tcf_head common.tcfc_head
e9ce1cd3 DM	28	#define tcf_index common.tcfc_index
	29	#define tcf_refcnt common.tcfc_refcnt
	30	#define tcf_bindcnt common.tcfc_bindcnt
	31	#define tcf_capab common.tcfc_capab
	32	#define tcf_action common.tcfc_action
	33	#define tcf_tm common.tcfc_tm
	34	#define tcf_bstats common.tcfc_bstats
	35	#define tcf_qstats common.tcfc_qstats
	36	#define tcf_rate_est common.tcfc_rate_est
e9ce1cd3	37	#define tcf_lock common.tcfc_lock
c7de2cf0	38	#define tcf_rcu common.tcfc_rcu
e9ce1cd3	39
e9ce1cd3	40	struct tcf_hashinfo {
89819dc0	41	struct hlist_head *htab;
e9ce1cd3	42	unsigned int hmask;
89819dc0	43	spinlock_t lock;
ddafd34f	44	u32 index;
e9ce1cd3 DM	45	};
	46
	47	static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
	48	{
	49	return index & hmask;
	50	}
1da177e4	51
369ba567 WC	52	static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
369ba567 WC	53	{
89819dc0 WC	54	int i;
	55
	56	spin_lock_init(&hf->lock);
ddafd34f	57	hf->index = 0;
369ba567	58	hf->hmask = mask;
89819dc0	59	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
369ba567 WC	60	GFP_KERNEL);
	61	if (!hf->htab)
	62	return -ENOMEM;
89819dc0 WC	63	for (i = 0; i < mask + 1; i++)
89819dc0 WC	64	INIT_HLIST_HEAD(&hf->htab[i]);
369ba567 WC	65	return 0;
	66	}
	67
56e5d1ca ED	68	/* Update lastuse only if needed, to avoid dirtying a cache line.
	69	* We use a temp variable to avoid fetching jiffies twice.
	70	*/
	71	static inline void tcf_lastuse_update(struct tcf_t *tm)
	72	{
	73	unsigned long now = jiffies;
	74
	75	if (tm->lastuse != now)
	76	tm->lastuse = now;
	77	}
	78
1da177e4 LT	79	#ifdef CONFIG_NET_CLS_ACT
	80
	81	#define ACT_P_CREATED 1
	82	#define ACT_P_DELETED 1
	83
e9ce1cd3 DM	84	struct tc_action {
e9ce1cd3 DM	85	void *priv;
dc7f9f6e	86	const struct tc_action_ops *ops;
e9ce1cd3 DM	87	__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
e9ce1cd3 DM	88	__u32 order;
33be6271	89	struct list_head list;
1da177e4 LT	90	};
1da177e4 LT	91
e9ce1cd3	92	struct tc_action_ops {
1f747c26	93	struct list_head head;
e9ce1cd3	94	struct tcf_hashinfo *hinfo;
1da177e4 LT	95	char kind[IFNAMSIZ];
1da177e4 LT	96	__u32 type; /* TBD to match kind */
1da177e4	97	struct module *owner;
dc7f9f6e	98	int (act)(struct sk_buff , const struct tc_action , struct tcf_result );
e9ce1cd3	99	int (dump)(struct sk_buff , struct tc_action *, int, int);
a5b5c958	100	void (cleanup)(struct tc_action , int bind);
e9ce1cd3	101	int (lookup)(struct tc_action , u32);
c1b52739 BL	102	int (init)(struct net net, struct nlattr *nla,
	103	struct nlattr est, struct tc_action act, int ovr,
	104	int bind);
e9ce1cd3	105	int (walk)(struct sk_buff , struct netlink_callback , int, struct tc_action );
1da177e4 LT	106	};
1da177e4 LT	107
6e6a50c2	108	int tcf_hash_search(struct tc_action *a, u32 index);
ddafd34f	109	u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
86062033 WC	110	int tcf_hash_check(u32 index, struct tc_action *a, int bind);
86062033 WC	111	int tcf_hash_create(u32 index, struct nlattr est, struct tc_action a,
519c818e	112	int size, int bind, bool cpustats);
86062033 WC	113	void tcf_hash_cleanup(struct tc_action a, struct nlattr est);
86062033 WC	114	void tcf_hash_insert(struct tc_action *a);
e9ce1cd3	115
28e6b67f DB	116	int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
	117
	118	static inline int tcf_hash_release(struct tc_action *a, bool bind)
	119	{
	120	return __tcf_hash_release(a, bind, false);
	121	}
	122
4f1e9d89	123	int tcf_register_action(struct tc_action_ops *a, unsigned int mask);
5c15257f	124	int tcf_unregister_action(struct tc_action_ops *a);
55334a5d	125	int tcf_action_destroy(struct list_head *actions, int bind);
33be6271	126	int tcf_action_exec(struct sk_buff skb, const struct list_head actions,
5c15257f	127	struct tcf_result *res);
33be6271	128	int tcf_action_init(struct net net, struct nlattr nla,
5c15257f	129	struct nlattr est, char n, int ovr,
33be6271	130	int bind, struct list_head *);
5c15257f JP	131	struct tc_action tcf_action_init_1(struct net net, struct nlattr *nla,
	132	struct nlattr est, char n, int ovr,
	133	int bind);
33be6271	134	int tcf_action_dump(struct sk_buff skb, struct list_head , int, int);
5c15257f JP	135	int tcf_action_dump_old(struct sk_buff skb, struct tc_action a, int, int);
	136	int tcf_action_dump_1(struct sk_buff skb, struct tc_action a, int, int);
	137	int tcf_action_copy_stats(struct sk_buff , struct tc_action , int);
1da177e4	138	#endif /* CONFIG_NET_CLS_ACT */
1da177e4	139	#endif