[thirdparty/kernel/stable.git] / include / net / act_api.h

/* SPDX-License-Identifier: GPL-2.0 */
#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_idrinfo {
	spinlock_t	lock;
	struct idr	action_idr;
};

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_idrinfo		*idrinfo;

	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 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_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

/* 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     (*lookup)(struct net *net, struct tc_action **a, u32 index,
			  struct netlink_ext_ack *extack);
	int     (*init)(struct net *net, struct nlattr *nla,
			struct nlattr *est, struct tc_action **act, int ovr,
			int bind, struct netlink_ext_ack *extack);
	int     (*walk)(struct net *, struct sk_buff *,
			struct netlink_callback *, int,
			const struct tc_action_ops *,
			struct netlink_ext_ack *);
	void	(*stats_update)(struct tc_action *, u64, u32, u64);
	struct net_device *(*get_dev)(const struct tc_action *a);
};

struct tc_action_net {
	struct tcf_idrinfo *idrinfo;
	const struct tc_action_ops *ops;
};

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

	tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
	if (!tn->idrinfo)
		return -ENOMEM;
	tn->ops = ops;
	spin_lock_init(&tn->idrinfo->lock);
	idr_init(&tn->idrinfo->action_idr);
	return err;
}

void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
			 struct tcf_idrinfo *idrinfo);

static inline void tc_action_net_exit(struct list_head *net_list,
				      unsigned int id)
{
	struct net *net;

	rtnl_lock();
	list_for_each_entry(net, net_list, exit_list) {
		struct tc_action_net *tn = net_generic(net, id);

		tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
		kfree(tn->idrinfo);
	}
	rtnl_unlock();
}

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_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
		    int bind);
int tcf_idr_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_idr_cleanup(struct tc_action *a, struct nlattr *est);
void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);

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

static inline int tcf_idr_release(struct tc_action *a, bool bind)
{
	return __tcf_idr_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 netlink_ext_ack *extack);
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,
				    struct netlink_ext_ack *extack);
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
}

typedef int tc_setup_cb_t(enum tc_setup_type type,
			  void *type_data, void *cb_priv);

#ifdef CONFIG_NET_CLS_ACT
int tc_setup_cb_egdev_register(const struct net_device *dev,
			       tc_setup_cb_t *cb, void *cb_priv);
void tc_setup_cb_egdev_unregister(const struct net_device *dev,
				  tc_setup_cb_t *cb, void *cb_priv);
int tc_setup_cb_egdev_call(const struct net_device *dev,
			   enum tc_setup_type type, void *type_data,
			   bool err_stop);
#else
static inline
int tc_setup_cb_egdev_register(const struct net_device *dev,
			       tc_setup_cb_t *cb, void *cb_priv)
{
	return 0;
}

static inline
void tc_setup_cb_egdev_unregister(const struct net_device *dev,
				  tc_setup_cb_t *cb, void *cb_priv)
{
}

static inline
int tc_setup_cb_egdev_call(const struct net_device *dev,
			   enum tc_setup_type type, void *type_data,
			   bool err_stop)
{
	return 0;
}
#endif

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef __NET_ACT_API_H
	3	#define __NET_ACT_API_H
	4
	5	/*
0b0f43fe JHS	6	* Public action API for classifiers/qdiscs
0b0f43fe JHS	7	*/
1da177e4 LT	8
	9	#include <net/sch_generic.h>
	10	#include <net/pkt_sched.h>
ddf97ccd WC	11	#include <net/net_namespace.h>
ddf97ccd WC	12	#include <net/netns/generic.h>
1da177e4	13
65a206c0 CM	14	struct tcf_idrinfo {
	15	spinlock_t lock;
	16	struct idr action_idr;
a85a970a WC	17	};
	18
	19	struct tc_action_ops;
	20
	21	struct tc_action {
	22	const struct tc_action_ops *ops;
ec0595cc WC	23	__u32 type; /* for backward compat(TCA_OLD_COMPAT) */
	24	__u32 order;
	25	struct list_head list;
65a206c0	26	struct tcf_idrinfo *idrinfo;
a85a970a	27
ec0595cc WC	28	u32 tcfa_index;
	29	int tcfa_refcnt;
	30	int tcfa_bindcnt;
	31	u32 tcfa_capab;
	32	int tcfa_action;
	33	struct tcf_t tcfa_tm;
	34	struct gnet_stats_basic_packed tcfa_bstats;
	35	struct gnet_stats_queue tcfa_qstats;
1c0d32fd	36	struct net_rate_estimator __rcu *tcfa_rate_est;
ec0595cc	37	spinlock_t tcfa_lock;
519c818e ED	38	struct gnet_stats_basic_cpu __percpu *cpu_bstats;
519c818e ED	39	struct gnet_stats_queue __percpu *cpu_qstats;
1045ba77	40	struct tc_cookie *act_cookie;
db50514f	41	struct tcf_chain *goto_chain;
e9ce1cd3	42	};
ec0595cc WC	43	#define tcf_index common.tcfa_index
	44	#define tcf_refcnt common.tcfa_refcnt
	45	#define tcf_bindcnt common.tcfa_bindcnt
	46	#define tcf_capab common.tcfa_capab
	47	#define tcf_action common.tcfa_action
	48	#define tcf_tm common.tcfa_tm
	49	#define tcf_bstats common.tcfa_bstats
	50	#define tcf_qstats common.tcfa_qstats
	51	#define tcf_rate_est common.tcfa_rate_est
	52	#define tcf_lock common.tcfa_lock
e9ce1cd3	53
56e5d1ca ED	54	/* Update lastuse only if needed, to avoid dirtying a cache line.
	55	* We use a temp variable to avoid fetching jiffies twice.
	56	*/
	57	static inline void tcf_lastuse_update(struct tcf_t *tm)
	58	{
	59	unsigned long now = jiffies;
	60
	61	if (tm->lastuse != now)
	62	tm->lastuse = now;
53eb440f JHS	63	if (unlikely(!tm->firstuse))
53eb440f JHS	64	tm->firstuse = now;
56e5d1ca ED	65	}
56e5d1ca ED	66
48d8ee16 JHS	67	static inline void tcf_tm_dump(struct tcf_t dtm, const struct tcf_t stm)
	68	{
	69	dtm->install = jiffies_to_clock_t(jiffies - stm->install);
	70	dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
	71	dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
	72	dtm->expires = jiffies_to_clock_t(stm->expires);
	73	}
	74
00175aec AV	75	#ifdef CONFIG_NET_CLS_ACT
	76
	77	#define ACT_P_CREATED 1
	78	#define ACT_P_DELETED 1
	79
e9ce1cd3	80	struct tc_action_ops {
1f747c26	81	struct list_head head;
1da177e4 LT	82	char kind[IFNAMSIZ];
1da177e4 LT	83	__u32 type; /* TBD to match kind */
a85a970a	84	size_t size;
1da177e4	85	struct module *owner;
0b0f43fe JHS	86	int (act)(struct sk_buff , const struct tc_action *,
0b0f43fe JHS	87	struct tcf_result *);
e9ce1cd3	88	int (dump)(struct sk_buff , struct tc_action *, int, int);
9a63b255	89	void (cleanup)(struct tc_action );
331a9295 AA	90	int (lookup)(struct net net, struct tc_action **a, u32 index,
331a9295 AA	91	struct netlink_ext_ack *extack);
c1b52739	92	int (init)(struct net net, struct nlattr *nla,
a85a970a	93	struct nlattr est, struct tc_action *act, int ovr,
589dad6d	94	int bind, struct netlink_ext_ack *extack);
ddf97ccd	95	int (walk)(struct net , struct sk_buff *,
1af85155	96	struct netlink_callback *, int,
41780105 AA	97	const struct tc_action_ops *,
41780105 AA	98	struct netlink_ext_ack *);
38040702	99	void (stats_update)(struct tc_action , u64, u32, u64);
843e79d0	100	struct net_device (get_dev)(const struct tc_action *a);
ddf97ccd WC	101	};
	102
	103	struct tc_action_net {
65a206c0	104	struct tcf_idrinfo *idrinfo;
ddf97ccd	105	const struct tc_action_ops *ops;
1da177e4 LT	106	};
1da177e4 LT	107
ddf97ccd	108	static inline
0b0f43fe	109	int tc_action_net_init(struct tc_action_net *tn,
c7e460ce	110	const struct tc_action_ops *ops)
ddf97ccd WC	111	{
	112	int err = 0;
	113
65a206c0 CM	114	tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
65a206c0 CM	115	if (!tn->idrinfo)
ddf97ccd WC	116	return -ENOMEM;
ddf97ccd WC	117	tn->ops = ops;
65a206c0 CM	118	spin_lock_init(&tn->idrinfo->lock);
65a206c0 CM	119	idr_init(&tn->idrinfo->action_idr);
ddf97ccd WC	120	return err;
	121	}
	122
65a206c0 CM	123	void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
65a206c0 CM	124	struct tcf_idrinfo *idrinfo);
ddf97ccd	125
039af9c6 CW	126	static inline void tc_action_net_exit(struct list_head *net_list,
039af9c6 CW	127	unsigned int id)
ddf97ccd	128	{
039af9c6 CW	129	struct net *net;
039af9c6 CW	130
a159d3c4	131	rtnl_lock();
039af9c6 CW	132	list_for_each_entry(net, net_list, exit_list) {
	133	struct tc_action_net *tn = net_generic(net, id);
	134
	135	tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
	136	kfree(tn->idrinfo);
	137	}
a159d3c4	138	rtnl_unlock();
ddf97ccd WC	139	}
	140
	141	int tcf_generic_walker(struct tc_action_net tn, struct sk_buff skb,
	142	struct netlink_callback *cb, int type,
a85a970a	143	const struct tc_action_ops *ops);
65a206c0 CM	144	int tcf_idr_search(struct tc_action_net tn, struct tc_action *a, u32 index);
65a206c0 CM	145	bool tcf_idr_check(struct tc_action_net tn, u32 index, struct tc_action *a,
b2313077	146	int bind);
65a206c0 CM	147	int tcf_idr_create(struct tc_action_net tn, u32 index, struct nlattr est,
	148	struct tc_action *a, const struct tc_action_ops ops,
	149	int bind, bool cpustats);
	150	void tcf_idr_cleanup(struct tc_action a, struct nlattr est);
	151	void tcf_idr_insert(struct tc_action_net tn, struct tc_action a);
e9ce1cd3	152
65a206c0	153	int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
28e6b67f	154
65a206c0	155	static inline int tcf_idr_release(struct tc_action *a, bool bind)
28e6b67f	156	{
65a206c0	157	return __tcf_idr_release(a, bind, false);
28e6b67f DB	158	}
28e6b67f DB	159
ddf97ccd	160	int tcf_register_action(struct tc_action_ops a, struct pernet_operations ops);
0b0f43fe JHS	161	int tcf_unregister_action(struct tc_action_ops *a,
0b0f43fe JHS	162	struct pernet_operations *ops);
55334a5d	163	int tcf_action_destroy(struct list_head *actions, int bind);
22dc13c8 WC	164	int tcf_action_exec(struct sk_buff skb, struct tc_action *actions,
22dc13c8 WC	165	int nr_actions, struct tcf_result *res);
9fb9f251 JP	166	int tcf_action_init(struct net net, struct tcf_proto tp, struct nlattr *nla,
9fb9f251 JP	167	struct nlattr est, char name, int ovr, int bind,
aea0d727	168	struct list_head actions, struct netlink_ext_ack extack);
9fb9f251 JP	169	struct tc_action tcf_action_init_1(struct net net, struct tcf_proto *tp,
9fb9f251 JP	170	struct nlattr nla, struct nlattr est,
aea0d727 AA	171	char *name, int ovr, int bind,
aea0d727 AA	172	struct netlink_ext_ack *extack);
33be6271	173	int tcf_action_dump(struct sk_buff skb, struct list_head , int, int);
5c15257f JP	174	int tcf_action_dump_old(struct sk_buff skb, struct tc_action a, int, int);
	175	int tcf_action_dump_1(struct sk_buff skb, struct tc_action a, int, int);
	176	int tcf_action_copy_stats(struct sk_buff , struct tc_action , int);
00175aec	177
2734437e	178	#endif /* CONFIG_NET_CLS_ACT */
86cb13e4	179
38040702 AV	180	static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
	181	u64 packets, u64 lastuse)
	182	{
2734437e	183	#ifdef CONFIG_NET_CLS_ACT
38040702 AV	184	if (!a->ops->stats_update)
	185	return;
	186
	187	a->ops->stats_update(a, bytes, packets, lastuse);
2734437e	188	#endif
38040702 AV	189	}
38040702 AV	190
b3f55bdd JP	191	typedef int tc_setup_cb_t(enum tc_setup_type type,
	192	void type_data, void cb_priv);
	193
	194	#ifdef CONFIG_NET_CLS_ACT
	195	int tc_setup_cb_egdev_register(const struct net_device *dev,
	196	tc_setup_cb_t cb, void cb_priv);
	197	void tc_setup_cb_egdev_unregister(const struct net_device *dev,
	198	tc_setup_cb_t cb, void cb_priv);
	199	int tc_setup_cb_egdev_call(const struct net_device *dev,
	200	enum tc_setup_type type, void *type_data,
	201	bool err_stop);
	202	#else
	203	static inline
	204	int tc_setup_cb_egdev_register(const struct net_device *dev,
	205	tc_setup_cb_t cb, void cb_priv)
	206	{
	207	return 0;
	208	}
	209
	210	static inline
	211	void tc_setup_cb_egdev_unregister(const struct net_device *dev,
	212	tc_setup_cb_t cb, void cb_priv)
	213	{
	214	}
	215
	216	static inline
	217	int tc_setup_cb_egdev_call(const struct net_device *dev,
	218	enum tc_setup_type type, void *type_data,
	219	bool err_stop)
	220	{
	221	return 0;
	222	}
	223	#endif
	224
1da177e4	225	#endif