/* 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; 	atomic_t			tcfa_drops;	atomic_t			tcfa_overlimits; 	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;	struct rcu_head         tcfa_rcu;	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_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 (READ_ONCE(tm->lastuse) != now)		WRITE_ONCE(tm->lastuse, now);	if (unlikely(!READ_ONCE(tm->firstuse)))		WRITE_ONCE(tm->firstuse, now);} static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm){	unsigned long firstuse, now = jiffies; 	dtm->install = jiffies_to_clock_t(now - READ_ONCE(stm->install));	dtm->lastuse = jiffies_to_clock_t(now - READ_ONCE(stm->lastuse)); 	firstuse = READ_ONCE(stm->firstuse);	dtm->firstuse = firstuse ?		jiffies_to_clock_t(now - firstuse) : 0; 	dtm->expires = jiffies_to_clock_t(READ_ONCE(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, u64, bool);	size_t  (*get_fill_size)(const struct tc_action *act);	struct net_device *(*get_dev)(const struct tc_action *a,				      tc_action_priv_destructor *destructor);	struct psample_group *	(*get_psample_group)(const struct tc_action *a,			     tc_action_priv_destructor *destructor);	int     (*offload_act_setup)(struct tc_action *act, void *entry_data,				     u32 *index_inc, bool bind,				     struct netlink_ext_ack *extack);}; #ifdef CONFIG_NET_CLS_ACT #define ACT_P_BOUND 0#define ACT_P_CREATED 1#define ACT_P_DELETED 1 struct tc_action_net {	struct tcf_idrinfo *idrinfo;	const struct tc_action_ops *ops;}; static inlineint tc_action_net_init(struct net *net, struct tc_action_net *tn,		       const struct tc_action_ops *ops){	int err = 0; 	tn->idrinfo = kmalloc_obj(*tn->idrinfo);	if (!tn->idrinfo)		return -ENOMEM;	tn->ops = ops;	tn->idrinfo->net = net;	mutex_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; 	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);	}} 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,		       struct netlink_ext_ack *extack);int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);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, u32 flags);int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index,			      struct nlattr *est, struct tc_action **a,			      const struct tc_action_ops *ops, int bind,			      u32 flags);void tcf_idr_insert_many(struct tc_action *actions[], int init_res[]);void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,			struct tc_action **a, int bind);int tcf_idr_release(struct tc_action *a, bool bind); 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);#define NET_ACT_ALIAS_PREFIX "net-act-"#define MODULE_ALIAS_NET_ACT(kind)	MODULE_ALIAS(NET_ACT_ALIAS_PREFIX kind)int tcf_action_destroy(struct tc_action *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,		    struct tc_action *actions[], int init_res[], size_t *attr_size,		    u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, u32 flags,					 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,				    struct tc_action_ops *a_o, int *init_res,				    u32 flags, struct netlink_ext_ack *extack);int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,		    int ref, bool terse);int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); static inline void tcf_action_update_bstats(struct tc_action *a,					    struct sk_buff *skb){	if (likely(a->cpu_bstats)) {		bstats_update(this_cpu_ptr(a->cpu_bstats), skb);		return;	}	spin_lock(&a->tcfa_lock);	bstats_update(&a->tcfa_bstats, skb);	spin_unlock(&a->tcfa_lock);} static inline void tcf_action_inc_drop_qstats(struct tc_action *a){	if (likely(a->cpu_qstats)) {		qstats_drop_inc(this_cpu_ptr(a->cpu_qstats));		return;	}	atomic_inc(&a->tcfa_drops);} static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a){	if (likely(a->cpu_qstats)) {		qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats));		return;	}	atomic_inc(&a->tcfa_overlimits);} void tcf_action_update_stats(struct tc_action *a, u64 bytes, u64 packets,			     u64 drops, bool hw);int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); int tcf_action_update_hw_stats(struct tc_action *action);int tcf_action_reoffload_cb(flow_indr_block_bind_cb_t *cb,			    void *cb_priv, bool add);int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,			     struct tcf_chain **handle,			     struct netlink_ext_ack *newchain);struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,					 struct tcf_chain *newchain); #ifdef CONFIG_INETDECLARE_STATIC_KEY_FALSE(tcf_frag_xmit_count);#endif int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); #else /* !CONFIG_NET_CLS_ACT */ static inline int tcf_action_reoffload_cb(flow_indr_block_bind_cb_t *cb,					  void *cb_priv, bool add) {	return 0;} #endif /* CONFIG_NET_CLS_ACT */ static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,					   u64 packets, u64 drops,					   u64 lastuse, bool hw){#ifdef CONFIG_NET_CLS_ACT	if (!a->ops->stats_update)		return; 	a->ops->stats_update(a, bytes, packets, drops, lastuse, hw);#endif}  #endif