linux/include/net/act_api.h
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   1#ifndef __NET_ACT_API_H
   2#define __NET_ACT_API_H
   3
   4/*
   5 * Public police action API for classifiers/qdiscs
   6 */
   7
   8#include <net/sch_generic.h>
   9#include <net/pkt_sched.h>
  10
  11struct tcf_common {
  12        struct tcf_common               *tcfc_next;
  13        u32                             tcfc_index;
  14        int                             tcfc_refcnt;
  15        int                             tcfc_bindcnt;
  16        u32                             tcfc_capab;
  17        int                             tcfc_action;
  18        struct tcf_t                    tcfc_tm;
  19        struct gnet_stats_basic_packed  tcfc_bstats;
  20        struct gnet_stats_queue         tcfc_qstats;
  21        struct gnet_stats_rate_est      tcfc_rate_est;
  22        spinlock_t                      tcfc_lock;
  23        struct rcu_head                 tcfc_rcu;
  24};
  25#define tcf_next        common.tcfc_next
  26#define tcf_index       common.tcfc_index
  27#define tcf_refcnt      common.tcfc_refcnt
  28#define tcf_bindcnt     common.tcfc_bindcnt
  29#define tcf_capab       common.tcfc_capab
  30#define tcf_action      common.tcfc_action
  31#define tcf_tm          common.tcfc_tm
  32#define tcf_bstats      common.tcfc_bstats
  33#define tcf_qstats      common.tcfc_qstats
  34#define tcf_rate_est    common.tcfc_rate_est
  35#define tcf_lock        common.tcfc_lock
  36#define tcf_rcu         common.tcfc_rcu
  37
  38struct tcf_police {
  39        struct tcf_common       common;
  40        int                     tcfp_result;
  41        u32                     tcfp_ewma_rate;
  42        u32                     tcfp_burst;
  43        u32                     tcfp_mtu;
  44        u32                     tcfp_toks;
  45        u32                     tcfp_ptoks;
  46        psched_time_t           tcfp_t_c;
  47        struct qdisc_rate_table *tcfp_R_tab;
  48        struct qdisc_rate_table *tcfp_P_tab;
  49};
  50#define to_police(pc)   \
  51        container_of(pc, struct tcf_police, common)
  52
  53struct tcf_hashinfo {
  54        struct tcf_common       **htab;
  55        unsigned int            hmask;
  56        rwlock_t                *lock;
  57};
  58
  59static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
  60{
  61        return index & hmask;
  62}
  63
  64#ifdef CONFIG_NET_CLS_ACT
  65
  66#define ACT_P_CREATED 1
  67#define ACT_P_DELETED 1
  68
  69struct tcf_act_hdr {
  70        struct tcf_common       common;
  71};
  72
  73struct tc_action {
  74        void                    *priv;
  75        const struct tc_action_ops      *ops;
  76        __u32                   type; /* for backward compat(TCA_OLD_COMPAT) */
  77        __u32                   order;
  78        struct tc_action        *next;
  79};
  80
  81#define TCA_CAP_NONE 0
  82struct tc_action_ops {
  83        struct tc_action_ops *next;
  84        struct tcf_hashinfo *hinfo;
  85        char    kind[IFNAMSIZ];
  86        __u32   type; /* TBD to match kind */
  87        __u32   capab;  /* capabilities includes 4 bit version */
  88        struct module           *owner;
  89        int     (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *);
  90        int     (*get_stats)(struct sk_buff *, struct tc_action *);
  91        int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
  92        int     (*cleanup)(struct tc_action *, int bind);
  93        int     (*lookup)(struct tc_action *, u32);
  94        int     (*init)(struct nlattr *, struct nlattr *, struct tc_action *, int , int);
  95        int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
  96};
  97
  98extern struct tcf_common *tcf_hash_lookup(u32 index,
  99                                          struct tcf_hashinfo *hinfo);
 100extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 101extern int tcf_hash_release(struct tcf_common *p, int bind,
 102                            struct tcf_hashinfo *hinfo);
 103extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
 104                              int type, struct tc_action *a);
 105extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
 106extern int tcf_hash_search(struct tc_action *a, u32 index);
 107extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
 108                                         int bind, struct tcf_hashinfo *hinfo);
 109extern struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,
 110                                          struct tc_action *a, int size,
 111                                          int bind, u32 *idx_gen,
 112                                          struct tcf_hashinfo *hinfo);
 113extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 114
 115extern int tcf_register_action(struct tc_action_ops *a);
 116extern int tcf_unregister_action(struct tc_action_ops *a);
 117extern void tcf_action_destroy(struct tc_action *a, int bind);
 118extern int tcf_action_exec(struct sk_buff *skb, const struct tc_action *a, struct tcf_result *res);
 119extern struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est, char *n, int ovr, int bind);
 120extern struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est, char *n, int ovr, int bind);
 121extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
 122extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
 123extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
 124extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
 125#endif /* CONFIG_NET_CLS_ACT */
 126#endif
 127
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