[mirror_ubuntu-artful-kernel.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 net_rate_estimator __rcu *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;
	struct tc_cookie	*act_cookie;
	struct tcf_chain	*goto_chain;
};
#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);
	int	(*get_dev)(const struct tc_action *a, struct net *net,
			   struct net_device **mirred_dev);
};

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 tcf_proto *tp, struct nlattr *nla,
		    struct nlattr *est, char *name, int ovr, int bind,
		    struct list_head *actions);
struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
				    struct nlattr *nla, struct nlattr *est,
				    char *name, 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
1da177e4 LT	1	#ifndef __NET_ACT_API_H
	2	#define __NET_ACT_API_H
	3
	4	/*
0b0f43fe JHS	5	* Public action API for classifiers/qdiscs
0b0f43fe JHS	6	*/
1da177e4 LT	7
	8	#include <net/sch_generic.h>
	9	#include <net/pkt_sched.h>
ddf97ccd WC	10	#include <net/net_namespace.h>
ddf97ccd WC	11	#include <net/netns/generic.h>
1da177e4	12
a85a970a WC	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;
ec0595cc WC	25	__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
	26	__u32 order;
	27	struct list_head list;
	28	struct tcf_hashinfo *hinfo;
a85a970a	29
ec0595cc WC	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;
1c0d32fd	39	struct net_rate_estimator __rcu *tcfa_rate_est;
ec0595cc WC	40	spinlock_t tcfa_lock;
ec0595cc WC	41	struct rcu_head tcfa_rcu;
519c818e ED	42	struct gnet_stats_basic_cpu __percpu *cpu_bstats;
519c818e ED	43	struct gnet_stats_queue __percpu *cpu_qstats;
1045ba77	44	struct tc_cookie *act_cookie;
db50514f	45	struct tcf_chain *goto_chain;
e9ce1cd3	46	};
ec0595cc WC	47	#define tcf_head common.tcfa_head
	48	#define tcf_index common.tcfa_index
	49	#define tcf_refcnt common.tcfa_refcnt
	50	#define tcf_bindcnt common.tcfa_bindcnt
	51	#define tcf_capab common.tcfa_capab
	52	#define tcf_action common.tcfa_action
	53	#define tcf_tm common.tcfa_tm
	54	#define tcf_bstats common.tcfa_bstats
	55	#define tcf_qstats common.tcfa_qstats
	56	#define tcf_rate_est common.tcfa_rate_est
	57	#define tcf_lock common.tcfa_lock
	58	#define tcf_rcu common.tcfa_rcu
e9ce1cd3	59
e9ce1cd3 DM	60	static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
	61	{
	62	return index & hmask;
	63	}
1da177e4	64
369ba567 WC	65	static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
369ba567 WC	66	{
89819dc0 WC	67	int i;
	68
	69	spin_lock_init(&hf->lock);
ddafd34f	70	hf->index = 0;
369ba567	71	hf->hmask = mask;
89819dc0	72	hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
369ba567 WC	73	GFP_KERNEL);
	74	if (!hf->htab)
	75	return -ENOMEM;
89819dc0 WC	76	for (i = 0; i < mask + 1; i++)
89819dc0 WC	77	INIT_HLIST_HEAD(&hf->htab[i]);
369ba567 WC	78	return 0;
	79	}
	80
56e5d1ca ED	81	/* Update lastuse only if needed, to avoid dirtying a cache line.
	82	* We use a temp variable to avoid fetching jiffies twice.
	83	*/
	84	static inline void tcf_lastuse_update(struct tcf_t *tm)
	85	{
	86	unsigned long now = jiffies;
	87
	88	if (tm->lastuse != now)
	89	tm->lastuse = now;
53eb440f JHS	90	if (unlikely(!tm->firstuse))
53eb440f JHS	91	tm->firstuse = now;
56e5d1ca ED	92	}
56e5d1ca ED	93
48d8ee16 JHS	94	static inline void tcf_tm_dump(struct tcf_t dtm, const struct tcf_t stm)
	95	{
	96	dtm->install = jiffies_to_clock_t(jiffies - stm->install);
	97	dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
	98	dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
	99	dtm->expires = jiffies_to_clock_t(stm->expires);
	100	}
	101
00175aec AV	102	#ifdef CONFIG_NET_CLS_ACT
	103
	104	#define ACT_P_CREATED 1
	105	#define ACT_P_DELETED 1
	106
e9ce1cd3	107	struct tc_action_ops {
1f747c26	108	struct list_head head;
1da177e4 LT	109	char kind[IFNAMSIZ];
1da177e4 LT	110	__u32 type; /* TBD to match kind */
a85a970a	111	size_t size;
1da177e4	112	struct module *owner;
0b0f43fe JHS	113	int (act)(struct sk_buff , const struct tc_action *,
0b0f43fe JHS	114	struct tcf_result *);
e9ce1cd3	115	int (dump)(struct sk_buff , struct tc_action *, int, int);
a5b5c958	116	void (cleanup)(struct tc_action , int bind);
a85a970a	117	int (lookup)(struct net , struct tc_action **, u32);
c1b52739	118	int (init)(struct net net, struct nlattr *nla,
a85a970a	119	struct nlattr est, struct tc_action *act, int ovr,
c1b52739	120	int bind);
ddf97ccd	121	int (walk)(struct net , struct sk_buff *,
a85a970a	122	struct netlink_callback , int, const struct tc_action_ops );
38040702	123	void (stats_update)(struct tc_action , u64, u32, u64);
255cb304 HHZ	124	int (get_dev)(const struct tc_action a, struct net *net,
255cb304 HHZ	125	struct net_device **mirred_dev);
ddf97ccd WC	126	};
	127
	128	struct tc_action_net {
	129	struct tcf_hashinfo *hinfo;
	130	const struct tc_action_ops *ops;
1da177e4 LT	131	};
1da177e4 LT	132
ddf97ccd	133	static inline
0b0f43fe JHS	134	int tc_action_net_init(struct tc_action_net *tn,
0b0f43fe JHS	135	const struct tc_action_ops *ops, unsigned int mask)
ddf97ccd WC	136	{
	137	int err = 0;
	138
	139	tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
	140	if (!tn->hinfo)
	141	return -ENOMEM;
	142	tn->ops = ops;
	143	err = tcf_hashinfo_init(tn->hinfo, mask);
	144	if (err)
	145	kfree(tn->hinfo);
	146	return err;
	147	}
	148
	149	void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
	150	struct tcf_hashinfo *hinfo);
	151
	152	static inline void tc_action_net_exit(struct tc_action_net *tn)
	153	{
	154	tcf_hashinfo_destroy(tn->ops, tn->hinfo);
18fcf49f	155	kfree(tn->hinfo);
ddf97ccd WC	156	}
	157
	158	int tcf_generic_walker(struct tc_action_net tn, struct sk_buff skb,
	159	struct netlink_callback *cb, int type,
a85a970a WC	160	const struct tc_action_ops *ops);
a85a970a WC	161	int tcf_hash_search(struct tc_action_net tn, struct tc_action *a, u32 index);
ddf97ccd	162	u32 tcf_hash_new_index(struct tc_action_net *tn);
a85a970a	163	bool tcf_hash_check(struct tc_action_net tn, u32 index, struct tc_action *a,
b2313077	164	int bind);
ddf97ccd	165	int tcf_hash_create(struct tc_action_net tn, u32 index, struct nlattr est,
a85a970a WC	166	struct tc_action *a, const struct tc_action_ops ops, int bind,
a85a970a WC	167	bool cpustats);
86062033	168	void tcf_hash_cleanup(struct tc_action a, struct nlattr est);
ddf97ccd	169	void tcf_hash_insert(struct tc_action_net tn, struct tc_action a);
e9ce1cd3	170
28e6b67f DB	171	int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
	172
	173	static inline int tcf_hash_release(struct tc_action *a, bool bind)
	174	{
	175	return __tcf_hash_release(a, bind, false);
	176	}
	177
ddf97ccd	178	int tcf_register_action(struct tc_action_ops a, struct pernet_operations ops);
0b0f43fe JHS	179	int tcf_unregister_action(struct tc_action_ops *a,
0b0f43fe JHS	180	struct pernet_operations *ops);
55334a5d	181	int tcf_action_destroy(struct list_head *actions, int bind);
22dc13c8 WC	182	int tcf_action_exec(struct sk_buff skb, struct tc_action *actions,
22dc13c8 WC	183	int nr_actions, struct tcf_result *res);
9fb9f251 JP	184	int tcf_action_init(struct net net, struct tcf_proto tp, struct nlattr *nla,
	185	struct nlattr est, char name, int ovr, int bind,
	186	struct list_head *actions);
	187	struct tc_action tcf_action_init_1(struct net net, struct tcf_proto *tp,
	188	struct nlattr nla, struct nlattr est,
	189	char *name, int ovr, int bind);
33be6271	190	int tcf_action_dump(struct sk_buff skb, struct list_head , int, int);
5c15257f JP	191	int tcf_action_dump_old(struct sk_buff skb, struct tc_action a, int, int);
	192	int tcf_action_dump_1(struct sk_buff skb, struct tc_action a, int, int);
	193	int tcf_action_copy_stats(struct sk_buff , struct tc_action , int);
00175aec	194
2734437e	195	#endif /* CONFIG_NET_CLS_ACT */
86cb13e4	196
38040702 AV	197	static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
	198	u64 packets, u64 lastuse)
	199	{
2734437e	200	#ifdef CONFIG_NET_CLS_ACT
38040702 AV	201	if (!a->ops->stats_update)
	202	return;
	203
	204	a->ops->stats_update(a, bytes, packets, lastuse);
2734437e	205	#endif
38040702 AV	206	}
38040702 AV	207
1da177e4	208	#endif