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 #define tca_gen(name) \
  12 struct tcf_##name *next; \
  13         u32 index; \
  14         int refcnt; \
  15         int bindcnt; \
  16         u32 capab; \
  17         int action; \
  18         struct tcf_t tm; \
  19         struct gnet_stats_basic bstats; \
  20         struct gnet_stats_queue qstats; \
  21         struct gnet_stats_rate_est rate_est; \
  22         spinlock_t *stats_lock; \
  23         spinlock_t lock
  24
  25 struct tcf_police
  26 {
  27         tca_gen(police);
  28         int             result;
  29         u32             ewma_rate;
  30         u32             burst;
  31         u32             mtu;
  32         u32             toks;
  33         u32             ptoks;
  34         psched_time_t   t_c;
  35         struct qdisc_rate_table *R_tab;
  36         struct qdisc_rate_table *P_tab;
  37 };
  38
  39 #ifdef CONFIG_NET_CLS_ACT
  40
  41 #define ACT_P_CREATED 1
  42 #define ACT_P_DELETED 1
  43
  44 struct tcf_act_hdr
  45 {
  46         tca_gen(act_hdr);
  47 };
  48
  49 struct tc_action
  50 {
  51         void *priv;
  52         struct tc_action_ops *ops;
  53         __u32   type;   /* for backward compat(TCA_OLD_COMPAT) */
  54         __u32   order;
  55         struct tc_action *next;
  56 };
  57
  58 #define TCA_CAP_NONE 0
  59 struct tc_action_ops
  60 {
  61         struct tc_action_ops *next;
  62         char    kind[IFNAMSIZ];
  63         __u32   type; /* TBD to match kind */
  64         __u32   capab;  /* capabilities includes 4 bit version */
  65         struct module           *owner;
  66         int     (*act)(struct sk_buff **, struct tc_action *);
  67         int     (*get_stats)(struct sk_buff *, struct tc_action *);
  68         int     (*dump)(struct sk_buff *, struct tc_action *,int , int);
  69         int     (*cleanup)(struct tc_action *, int bind);
  70         int     (*lookup)(struct tc_action *, u32 );
  71         int     (*init)(struct rtattr *,struct rtattr *,struct tc_action *, int , int );
  72         int     (*walk)(struct sk_buff *, struct netlink_callback *, int , struct tc_action *);
  73 };
  74
  75 extern int tcf_register_action(struct tc_action_ops *a);
  76 extern int tcf_unregister_action(struct tc_action_ops *a);
  77 extern void tcf_action_destroy(struct tc_action *a, int bind);
  78 extern int tcf_action_exec(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res);
  79 extern struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
  80 extern struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
  81 extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
  82 extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
  83 extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
  84 extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
  85 #endif /* CONFIG_NET_CLS_ACT */
  86
  87 extern int tcf_police(struct sk_buff *skb, struct tcf_police *p);
  88 extern void tcf_police_destroy(struct tcf_police *p);
  89 extern struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est);
  90 extern int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p);
  91 extern int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *p);
  92
  93 static inline int
  94 tcf_police_release(struct tcf_police *p, int bind)
  95 {
  96         int ret = 0;
  97 #ifdef CONFIG_NET_CLS_ACT
  98         if (p) {
  99                 if (bind) {
 100                          p->bindcnt--;
 101                 }
 102                 p->refcnt--;
 103                 if (p->refcnt <= 0 && !p->bindcnt) {
 104                         tcf_police_destroy(p);
 105                         ret = 1;
 106                 }
 107         }
 108 #else
 109         if (p && --p->refcnt == 0)
 110                 tcf_police_destroy(p);
 111
 112 #endif /* CONFIG_NET_CLS_ACT */
 113         return ret;
 114 }
 115
 116 #endif