#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> 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; } static inline void tcf_hashinfo_destroy(struct tcf_hashinfo *hf) { kfree(hf->htab); } /* 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; } #ifdef CONFIG_NET_CLS_ACT #define ACT_P_CREATED 1 #define ACT_P_DELETED 1 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 tc_action_ops { struct list_head head; struct tcf_hashinfo *hinfo; 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 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 sk_buff *, struct netlink_callback *, int, struct tc_action *); }; int tcf_hash_search(struct tc_action *a, u32 index); u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo); int tcf_hash_check(u32 index, struct tc_action *a, int bind); int tcf_hash_create(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 *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, unsigned int mask); int tcf_unregister_action(struct tc_action_ops *a); 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); #endif /* CONFIG_NET_CLS_ACT */ #endif