include/net/act_api.h

   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
  11 struct 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
  38 struct tcf_hashinfo {
  39         struct tcf_common       **htab;
  40         unsigned int            hmask;
  41         rwlock_t                *lock;
  42 };
  43
  44 static 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
  54 struct tcf_act_hdr {
  55         struct tcf_common       common;
  56 };
  57
  58 struct 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
  67 struct 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
  85 extern struct tcf_common *tcf_hash_lookup(u32 index,
  86                                           struct tcf_hashinfo *hinfo);
  87 extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
  88 extern int tcf_hash_release(struct tcf_common *p, int bind,
  89                             struct tcf_hashinfo *hinfo);
  90 extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
  91                               int type, struct tc_action *a);
  92 extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
  93 extern int tcf_hash_search(struct tc_action *a, u32 index);
  94 extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
  95                                          int bind, struct tcf_hashinfo *hinfo);
  96 extern struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est,
  97                                           struct tc_action *a, int size,
  98                                           int bind, u32 *idx_gen,
  99                                           struct tcf_hashinfo *hinfo);
 100 extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 101
 102 extern int tcf_register_action(struct tc_action_ops *a);
 103 extern int tcf_unregister_action(struct tc_action_ops *a);
 104 extern void tcf_action_destroy(struct tc_action *a, int bind);
 105 extern int tcf_action_exec(struct sk_buff *skb, const struct tc_action *a, struct tcf_result *res);
 106 extern struct tc_action *tcf_action_init(struct net *net, struct nlattr *nla,
 107                                          struct nlattr *est, char *n, int ovr,
 108                                          int bind);
 109 extern struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 110                                            struct nlattr *est, char *n, int ovr,
 111                                            int bind);
 112 extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
 113 extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
 114 extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
 115 extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
 116 #endif /* CONFIG_NET_CLS_ACT */
 117 #endif