[deliverable/linux.git] / include / net / act_api.h

#ifndef __NET_ACT_API_H
#define __NET_ACT_API_H

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

#include <net/sch_generic.h>
#include <net/pkt_sched.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>


struct tcf_hashinfo {
	struct hlist_head	*htab;
	unsigned int		hmask;
	spinlock_t		lock;
	u32			index;
};

struct tc_action_ops;

struct tc_action {
	const struct tc_action_ops	*ops;
	__u32				type; /* for backward compat(TCA_OLD_COMPAT) */
	__u32				order;
	struct list_head		list;
	struct tcf_hashinfo		*hinfo;

	struct hlist_node		tcfa_head;
	u32				tcfa_index;
	int				tcfa_refcnt;
	int				tcfa_bindcnt;
	u32				tcfa_capab;
	int				tcfa_action;
	struct tcf_t			tcfa_tm;
	struct gnet_stats_basic_packed	tcfa_bstats;
	struct gnet_stats_queue		tcfa_qstats;
	struct gnet_stats_rate_est64	tcfa_rate_est;
	spinlock_t			tcfa_lock;
	struct rcu_head			tcfa_rcu;
	struct gnet_stats_basic_cpu __percpu *cpu_bstats;
	struct gnet_stats_queue __percpu *cpu_qstats;
};
#define tcf_act		common.tcfa_act
#define tcf_head	common.tcfa_head
#define tcf_index	common.tcfa_index
#define tcf_refcnt	common.tcfa_refcnt
#define tcf_bindcnt	common.tcfa_bindcnt
#define tcf_capab	common.tcfa_capab
#define tcf_action	common.tcfa_action
#define tcf_tm		common.tcfa_tm
#define tcf_bstats	common.tcfa_bstats
#define tcf_qstats	common.tcfa_qstats
#define tcf_rate_est	common.tcfa_rate_est
#define tcf_lock	common.tcfa_lock
#define tcf_rcu		common.tcfa_rcu

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;
	if (unlikely(!tm->firstuse))
		tm->firstuse = now;
}

static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
{
	dtm->install = jiffies_to_clock_t(jiffies - stm->install);
	dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
	dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
	dtm->expires = jiffies_to_clock_t(stm->expires);
}

#ifdef CONFIG_NET_CLS_ACT

#define ACT_P_CREATED 1
#define ACT_P_DELETED 1

struct tc_action_ops {
	struct list_head head;
	char    kind[IFNAMSIZ];
	__u32   type; /* TBD to match kind */
	size_t	size;
	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 net *, 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 net *, struct sk_buff *,
			struct netlink_callback *, int, const struct tc_action_ops *);
	void	(*stats_update)(struct tc_action *, u64, u32, u64);
};

struct tc_action_net {
	struct tcf_hashinfo *hinfo;
	const struct tc_action_ops *ops;
};

static inline
int tc_action_net_init(struct tc_action_net *tn,
		       const struct tc_action_ops *ops, unsigned int mask)
{
	int err = 0;

	tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
	if (!tn->hinfo)
		return -ENOMEM;
	tn->ops = ops;
	err = tcf_hashinfo_init(tn->hinfo, mask);
	if (err)
		kfree(tn->hinfo);
	return err;
}

void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
			  struct tcf_hashinfo *hinfo);

static inline void tc_action_net_exit(struct tc_action_net *tn)
{
	tcf_hashinfo_destroy(tn->ops, tn->hinfo);
	kfree(tn->hinfo);
}

int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
		       struct netlink_callback *cb, int type,
		       const struct tc_action_ops *ops);
int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
u32 tcf_hash_new_index(struct tc_action_net *tn);
bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
		    int bind);
int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
		    struct tc_action **a, const struct tc_action_ops *ops, int bind,
		    bool cpustats);
void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
void tcf_hash_insert(struct tc_action_net *tn, 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, struct pernet_operations *ops);
int tcf_unregister_action(struct tc_action_ops *a,
			  struct pernet_operations *ops);
int tcf_action_destroy(struct list_head *actions, int bind);
int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
		    int nr_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 */

static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
					   u64 packets, u64 lastuse)
{
#ifdef CONFIG_NET_CLS_ACT
	if (!a->ops->stats_update)
		return;

	a->ops->stats_update(a, bytes, packets, lastuse);
#endif
}

#endif
Commit	Line	Data
	1	#ifndef __NET_ACT_API_H
	2	#define __NET_ACT_API_H
	3
	4	/*
	5	* Public action API for classifiers/qdiscs
	6	*/
	7
	8	#include <net/sch_generic.h>
	9	#include <net/pkt_sched.h>
	10	#include <net/net_namespace.h>
	11	#include <net/netns/generic.h>
	12
	13
	14	struct tcf_hashinfo {
	15	struct hlist_head *htab;
	16	unsigned int hmask;
	17	spinlock_t lock;
	18	u32 index;
	19	};
	20
	21	struct tc_action_ops;
	22
	23	struct tc_action {
	24	const struct tc_action_ops *ops;
	25	__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
	26	__u32 order;
	27	struct list_head list;
	28	struct tcf_hashinfo *hinfo;
	29
	30	struct hlist_node tcfa_head;
	31	u32 tcfa_index;
	32	int tcfa_refcnt;
	33	int tcfa_bindcnt;
	34	u32 tcfa_capab;
	35	int tcfa_action;
	36	struct tcf_t tcfa_tm;
	37	struct gnet_stats_basic_packed tcfa_bstats;
	38	struct gnet_stats_queue tcfa_qstats;
	39	struct gnet_stats_rate_est64 tcfa_rate_est;
	40	spinlock_t tcfa_lock;
	41	struct rcu_head tcfa_rcu;
	42	struct gnet_stats_basic_cpu __percpu *cpu_bstats;
	43	struct gnet_stats_queue __percpu *cpu_qstats;
	44	};
	45	#define tcf_act common.tcfa_act
	46	#define tcf_head common.tcfa_head
	47	#define tcf_index common.tcfa_index
	48	#define tcf_refcnt common.tcfa_refcnt
	49	#define tcf_bindcnt common.tcfa_bindcnt
	50	#define tcf_capab common.tcfa_capab
	51	#define tcf_action common.tcfa_action
	52	#define tcf_tm common.tcfa_tm
	53	#define tcf_bstats common.tcfa_bstats
	54	#define tcf_qstats common.tcfa_qstats
	55	#define tcf_rate_est common.tcfa_rate_est
	56	#define tcf_lock common.tcfa_lock
	57	#define tcf_rcu common.tcfa_rcu
	58
	59	static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
	60	{
	61	return index & hmask;
	62	}
	63
	64	static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
	65	{
	66	int i;
	67
	68	spin_lock_init(&hf->lock);
	69	hf->index = 0;
	70	hf->hmask = mask;
	71	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
	72	GFP_KERNEL);
	73	if (!hf->htab)
	74	return -ENOMEM;
	75	for (i = 0; i < mask + 1; i++)
	76	INIT_HLIST_HEAD(&hf->htab[i]);
	77	return 0;
	78	}
	79
	80	/* Update lastuse only if needed, to avoid dirtying a cache line.
	81	* We use a temp variable to avoid fetching jiffies twice.
	82	*/
	83	static inline void tcf_lastuse_update(struct tcf_t *tm)
	84	{
	85	unsigned long now = jiffies;
	86
	87	if (tm->lastuse != now)
	88	tm->lastuse = now;
	89	if (unlikely(!tm->firstuse))
	90	tm->firstuse = now;
	91	}
	92
	93	static inline void tcf_tm_dump(struct tcf_t dtm, const struct tcf_t stm)
	94	{
	95	dtm->install = jiffies_to_clock_t(jiffies - stm->install);
	96	dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
	97	dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
	98	dtm->expires = jiffies_to_clock_t(stm->expires);
	99	}
	100
	101	#ifdef CONFIG_NET_CLS_ACT
	102
	103	#define ACT_P_CREATED 1
	104	#define ACT_P_DELETED 1
	105
	106	struct tc_action_ops {
	107	struct list_head head;
	108	char kind[IFNAMSIZ];
	109	__u32 type; /* TBD to match kind */
	110	size_t size;
	111	struct module *owner;
	112	int (act)(struct sk_buff , const struct tc_action *,
	113	struct tcf_result *);
	114	int (dump)(struct sk_buff , struct tc_action *, int, int);
	115	void (cleanup)(struct tc_action , int bind);
	116	int (lookup)(struct net , struct tc_action **, u32);
	117	int (init)(struct net net, struct nlattr *nla,
	118	struct nlattr est, struct tc_action *act, int ovr,
	119	int bind);
	120	int (walk)(struct net , struct sk_buff *,
	121	struct netlink_callback , int, const struct tc_action_ops );
	122	void (stats_update)(struct tc_action , u64, u32, u64);
	123	};
	124
	125	struct tc_action_net {
	126	struct tcf_hashinfo *hinfo;
	127	const struct tc_action_ops *ops;
	128	};
	129
	130	static inline
	131	int tc_action_net_init(struct tc_action_net *tn,
	132	const struct tc_action_ops *ops, unsigned int mask)
	133	{
	134	int err = 0;
	135
	136	tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
	137	if (!tn->hinfo)
	138	return -ENOMEM;
	139	tn->ops = ops;
	140	err = tcf_hashinfo_init(tn->hinfo, mask);
	141	if (err)
	142	kfree(tn->hinfo);
	143	return err;
	144	}
	145
	146	void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
	147	struct tcf_hashinfo *hinfo);
	148
	149	static inline void tc_action_net_exit(struct tc_action_net *tn)
	150	{
	151	tcf_hashinfo_destroy(tn->ops, tn->hinfo);
	152	kfree(tn->hinfo);
	153	}
	154
	155	int tcf_generic_walker(struct tc_action_net tn, struct sk_buff skb,
	156	struct netlink_callback *cb, int type,
	157	const struct tc_action_ops *ops);
	158	int tcf_hash_search(struct tc_action_net tn, struct tc_action *a, u32 index);
	159	u32 tcf_hash_new_index(struct tc_action_net *tn);
	160	bool tcf_hash_check(struct tc_action_net tn, u32 index, struct tc_action *a,
	161	int bind);
	162	int tcf_hash_create(struct tc_action_net tn, u32 index, struct nlattr est,
	163	struct tc_action *a, const struct tc_action_ops ops, int bind,
	164	bool cpustats);
	165	void tcf_hash_cleanup(struct tc_action a, struct nlattr est);
	166	void tcf_hash_insert(struct tc_action_net tn, struct tc_action a);
	167
	168	int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
	169
	170	static inline int tcf_hash_release(struct tc_action *a, bool bind)
	171	{
	172	return __tcf_hash_release(a, bind, false);
	173	}
	174
	175	int tcf_register_action(struct tc_action_ops a, struct pernet_operations ops);
	176	int tcf_unregister_action(struct tc_action_ops *a,
	177	struct pernet_operations *ops);
	178	int tcf_action_destroy(struct list_head *actions, int bind);
	179	int tcf_action_exec(struct sk_buff skb, struct tc_action *actions,
	180	int nr_actions, struct tcf_result *res);
	181	int tcf_action_init(struct net net, struct nlattr nla,
	182	struct nlattr est, char n, int ovr,
	183	int bind, struct list_head *);
	184	struct tc_action tcf_action_init_1(struct net net, struct nlattr *nla,
	185	struct nlattr est, char n, int ovr,
	186	int bind);
	187	int tcf_action_dump(struct sk_buff skb, struct list_head , int, int);
	188	int tcf_action_dump_old(struct sk_buff skb, struct tc_action a, int, int);
	189	int tcf_action_dump_1(struct sk_buff skb, struct tc_action a, int, int);
	190	int tcf_action_copy_stats(struct sk_buff , struct tc_action , int);
	191
	192	#endif /* CONFIG_NET_CLS_ACT */
	193
	194	static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
	195	u64 packets, u64 lastuse)
	196	{
	197	#ifdef CONFIG_NET_CLS_ACT
	198	if (!a->ops->stats_update)
	199	return;
	200
	201	a->ops->stats_update(a, bytes, packets, lastuse);
	202	#endif
	203	}
	204
	205	#endif