#ifndef __NET_ACT_API_H#define __NET_ACT_API_H /* * Public police 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_common {	struct hlist_node		tcfc_head;	u32				tcfc_index;	int				tcfc_refcnt;	int				tcfc_bindcnt;	u32				tcfc_capab;	int				tcfc_action;	struct tcf_t			tcfc_tm;	struct gnet_stats_basic_packed	tcfc_bstats;	struct gnet_stats_queue		tcfc_qstats;	struct gnet_stats_rate_est64	tcfc_rate_est;	spinlock_t			tcfc_lock;	struct rcu_head			tcfc_rcu;	struct gnet_stats_basic_cpu __percpu *cpu_bstats;	struct gnet_stats_queue __percpu *cpu_qstats;};#define tcf_head	common.tcfc_head#define tcf_index	common.tcfc_index#define tcf_refcnt	common.tcfc_refcnt#define tcf_bindcnt	common.tcfc_bindcnt#define tcf_capab	common.tcfc_capab#define tcf_action	common.tcfc_action#define tcf_tm		common.tcfc_tm#define tcf_bstats	common.tcfc_bstats#define tcf_qstats	common.tcfc_qstats#define tcf_rate_est	common.tcfc_rate_est#define tcf_lock	common.tcfc_lock#define tcf_rcu		common.tcfc_rcu struct tcf_hashinfo {	struct hlist_head	*htab;	unsigned int		hmask;	spinlock_t		lock;	u32			index;}; 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;} struct tc_action {	void			*priv;	const struct tc_action_ops	*ops;	__u32			type; /* for backward compat(TCA_OLD_COMPAT) */	__u32			order;	struct list_head	list;	struct tcf_hashinfo	*hinfo;}; #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 */	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, struct tc_action *);}; 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,		       struct tc_action *a);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);int 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, int size, 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, const struct list_head *actions,		    struct tcf_result *res);int tcf_action_init(struct net *net, struct nlattr *nla,				  struct nlattr *est, char *n, int ovr,				  int bind, struct list_head *);struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,				    struct nlattr *est, char *n, 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); #define tc_no_actions(_exts) \	(list_empty(&(_exts)->actions)) #define tc_for_each_action(_a, _exts) \	list_for_each_entry(a, &(_exts)->actions, list)#else /* CONFIG_NET_CLS_ACT */ #define tc_no_actions(_exts) true#define tc_for_each_action(_a, _exts) while (0) #endif /* CONFIG_NET_CLS_ACT */#endif