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  *   €l–дY>”TФDЁ 	ЕЃrг`SЌяБѓ}Аі_†I|ҐЏ+БА %Ќ    /* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_ACT_API_H
#define __NET_ACT_API_H

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

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

struct tcf_idrinfo {
	struct mutex	lock;
	struct idr	action_idr;
	struct net	*net;
};

struct tc_action_ops;

struct tc_action {
	const struct tc_action_ops	*ops;
	__u32				type; /* for backward compat(TCA_OLD_COMPAT) */
	struct tcf_idrinfo		*idrinfo;

	u32				tcfa_index;
	refcount_t			tcfa_refcnt;
	atomic_t			tcfa_bindcnt;
	int				tcfa_action;
	struct tcf_t			tcfa_tm;
	struct gnet_stats_basic_sync	tcfa_bstats;
	struct gnet_stats_basic_sync	tcfa_bstats_hw;
	struct gnet_stats_queue		tcfa_qstats;
	struct net_rate_estimator __rcu *tcfa_rate_est;
	spinlock_t			tcfa_lock;
	struct gnet_stats_basic_sync __percpu *cpu_bstats;
	struct gnet_stats_basic_sync __percpu *cpu_bstats_hw;
	struct gnet_stats_queue __percpu *cpu_qstats;
	struct tc_cookie	__rcu *user_cookie;
	struct tcf_chain	__rcu *goto_chain;
	u32			tcfa_flags;
	u8			hw_stats;
	u8			used_hw_stats;
	bool			used_hw_stats_valid;
	u32			in_hw_count;
};
#define tcf_index	common.tcfa_index
#define tcf_refcnt	common.tcfa_refcnt
#define tcf_bindcnt	common.tcfa_bindcnt
#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 TCA_ACT_HW_STATS_ANY (TCA_ACT_HW_STATS_IMMEDIATE | \
			      TCA_ACT_HW_STATS_DELAYED)

/* Reserve 16 bits for user-space. See TCA_ACT_FLAGS_NO_PERCPU_STATS. */
#define TCA_ACT_FLAGS_USER_BITS 16
#define TCA_ACT_FLAGS_USER_MASK 0xffff
#define TCA_ACT_FLAGS_POLICE	(1U << TCA_ACT_FLAGS_USER_BITS)
#define TCA_ACT_FLAGS_BIND	(1U << (TCA_ACT_FLAGS_USER_BITS + 1))
#define TCA_ACT_FLAGS_REPLACE	(1U << (TCA_ACT_FLAGS_USER_BITS + 2))
#define TCA_ACT_FLAGS_NO_RTNL	(1U << (TCA_ACT_FLAGS_USER_BITS + 3))
#define TCA_ACT_FLAGS_AT_INGRESS	(1U << (TCA_ACT_FLAGS_USER_BITS + 4))
#define TCA_ACT_FLAGS_AT_INGRESS_OR_CLSACT	(1U << (TCA_ACT_FLAGS_USER_BITS + 5))

/* 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 = stm->firstuse ?
		jiffies_to_clock_t(jiffies - stm->firstuse) : 0;
	dtm->expires = jiffies_to_clock_t(stm->expires);
}

static inline enum flow_action_hw_stats tc_act_hw_stats(u8 hw_stats)
{
	if (WARN_ON_ONCE(hw_stats > TCA_ACT_HW_STATS_ANY))
		return FLOW_ACTION_HW_STATS_DONT_CARE;
	else if (!hw_stats)
		return FLOW_ACTION_HW_STATS_DISABLED;

	return hw_stats;
}

typedef void (*tc_action_priv_destructor)(void *priv);

struct tc_action_ops {
	struct list_head head;
	char    kind[IFNAMSIZ];
	enum tca_id  id; /* identifier should match kind */
	unsigned int	net_id;
	size_t	size;
	struct module		*owner;
	int     (*act)(struct sk_buff *, const struct tc_action *,
		       struct tcf_result *); /* called under RCU BH lock*/
	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);
	int     (*init)(struct net *net, struct nlattr *nla,
			struct nlattr *est, struct tc_action **act,
			struct tcf_proto *tp,
			u32 flags, 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, u64, u64,