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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 hlist_node               tcfc_head;
 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_head        common.tcfc_head
 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 hlist_head       *htab;
 40         unsigned int            hmask;
 41         spinlock_t              lock;
 42         u32                     index;
 43 };
 44 
 45 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
 46 {
 47         return index & hmask;
 48 }
 49 
 50 static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
 51 {
 52         int i;
 53 
 54         spin_lock_init(&hf->lock);
 55         hf->index = 0;
 56         hf->hmask = mask;
 57         hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
 58                            GFP_KERNEL);
 59         if (!hf->htab)
 60                 return -ENOMEM;
 61         for (i = 0; i < mask + 1; i++)
 62                 INIT_HLIST_HEAD(&hf->htab[i]);
 63         return 0;
 64 }
 65 
 66 static inline void tcf_hashinfo_destroy(struct tcf_hashinfo *hf)
 67 {
 68         kfree(hf->htab);
 69 }
 70 
 71 #ifdef CONFIG_NET_CLS_ACT
 72 
 73 #define ACT_P_CREATED 1
 74 #define ACT_P_DELETED 1
 75 
 76 struct tc_action {
 77         void                    *priv;
 78         const struct tc_action_ops      *ops;
 79         __u32                   type; /* for backward compat(TCA_OLD_COMPAT) */
 80         __u32                   order;
 81         struct list_head        list;
 82 };
 83 
 84 struct tc_action_ops {
 85         struct list_head head;
 86         struct tcf_hashinfo *hinfo;
 87         char    kind[IFNAMSIZ];
 88         __u32   type; /* TBD to match kind */
 89         struct module           *owner;
 90         int     (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *);
 91         int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
 92         void    (*cleanup)(struct tc_action *, int bind);
 93         int     (*lookup)(struct tc_action *, u32);
 94         int     (*init)(struct net *net, struct nlattr *nla,
 95                         struct nlattr *est, struct tc_action *act, int ovr,
 96                         int bind);
 97         int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
 98 };
 99 
100 int tcf_hash_search(struct tc_action *a, u32 index);
101 void tcf_hash_destroy(struct tc_action *a);
102 u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
103 int tcf_hash_check(u32 index, struct tc_action *a, int bind);
104 int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
105                     int size, int bind);
106 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
107 void tcf_hash_insert(struct tc_action *a);
108 
109 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
110 
111 static inline int tcf_hash_release(struct tc_action *a, bool bind)
112 {
113         return __tcf_hash_release(a, bind, false);
114 }
115 
116 int tcf_register_action(struct tc_action_ops *a, unsigned int mask);
117 int tcf_unregister_action(struct tc_action_ops *a);
118 int tcf_action_destroy(struct list_head *actions, int bind);
119 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
120                     struct tcf_result *res);
121 int tcf_action_init(struct net *net, struct nlattr *nla,
122                                   struct nlattr *est, char *n, int ovr,
123                                   int bind, struct list_head *);
124 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
125                                     struct nlattr *est, char *n, int ovr,
126                                     int bind);
127 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
128 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
129 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
130 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
131 #endif /* CONFIG_NET_CLS_ACT */
132 #endif
133 

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