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TOMOYO Linux Cross Reference
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 
 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_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 
 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
118 

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