LXR linux/include/net/act

   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_est64    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_hashinfo {
  39        struct tcf_common       **htab;
  40        unsigned int            hmask;
  41        rwlock_t                *lock;
  42};
  43
  44static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
  45{
  46        return index & hmask;
  47}
  48
  49#ifdef CONFIG_NET_CLS_ACT
  50
  51#define ACT_P_CREATED 1
  52#define ACT_P_DELETED 1
  53
  54struct tcf_act_hdr {
  55        struct tcf_common       common;
  56};
  57
  58struct tc_action {
  59        void                    *priv;
  60        const struct tc_action_ops      *ops;
  61        __u32                   type; /* for backward compat(TCA_OLD_COMPAT) */
  62        __u32                   order;
  63        struct tc_action        *next;
  64};
  65
  66#define TCA_CAP_NONE 0
  67struct tc_action_ops {
  68        struct tc_action_ops *next;
  69        struct tcf_hashinfo *hinfo;
  70        char    kind[IFNAMSIZ];
  71        __u32   type; /* TBD to match kind */
  72        __u32   capab;  /* capabilities includes 4 bit version */
  73        struct module           *owner;
  74        int     (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *);
  75        int     (*get_stats)(struct sk_buff *, struct tc_action *);
  76        int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
  77        int     (*cleanup)(struct tc_action *, int bind);
  78        int     (*lookup)(struct tc_action *, u32);
  79        int     (*init)(struct net *net, struct nlattr *nla,
  80                        struct nlattr *est, struct tc_action *act, int ovr,
  81                        int bind);
  82        int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
  83};
  84
  85struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo);
  86void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
  87int tcf_hash_release(struct tcf_common *p, int bind,
  88                     struct tcf_hashinfo *hinfo);
  89int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
  90                       int type, struct tc_action *a);
  91u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
  92int tcf_hash_search(struct tc_action *a, u32 index);
  93struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
  94                                  int bind, struct tcf_hashinfo *hinfo);
  95struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,
  96                                   struct tc_action *a, int size,
  97                                   int bind, u32 *idx_gen,
  98                                   struct tcf_hashinfo *hinfo);
  99void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 100
 101int tcf_register_action(struct tc_action_ops *a);
 102int tcf_unregister_action(struct tc_action_ops *a);
 103void tcf_action_destroy(struct tc_action *a, int bind);
 104int tcf_action_exec(struct sk_buff *skb, const struct tc_action *a,
 105                    struct tcf_result *res);
 106struct tc_action *tcf_action_init(struct net *net, struct nlattr *nla,
 107                                  struct nlattr *est, char *n, int ovr,
 108                                  int bind);
 109struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 110                                    struct nlattr *est, char *n, int ovr,
 111                                    int bind);
 112int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
 113int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
 114int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
 115int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
 116#endif /* CONFIG_NET_CLS_ACT */
 117#endif
 118