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 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