#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 inlineint 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