LXR linux/include/net/act

   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
  11struct 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
  38struct tcf_hashinfo {
  39        struct hlist_head       *htab;
  40        unsigned int            hmask;
  41        spinlock_t              lock;
  42        u32                     index;
  43};
  44
  45static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
  46{
  47        return index & hmask;
  48}
  49
  50static 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
  66static 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
  76struct 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
  84struct 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
 100int tcf_hash_search(struct tc_action *a, u32 index);
 101void tcf_hash_destroy(struct tc_action *a);
 102int tcf_hash_release(struct tc_action *a, int bind);
 103u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo);
 104int tcf_hash_check(u32 index, struct tc_action *a, int bind);
 105int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a,
 106                    int size, int bind);
 107void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
 108void tcf_hash_insert(struct tc_action *a);
 109
 110int tcf_register_action(struct tc_action_ops *a, unsigned int mask);
 111int tcf_unregister_action(struct tc_action_ops *a);
 112int tcf_action_destroy(struct list_head *actions, int bind);
 113int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
 114                    struct tcf_result *res);
 115int tcf_action_init(struct net *net, struct nlattr *nla,
 116                                  struct nlattr *est, char *n, int ovr,
 117                                  int bind, struct list_head *);
 118struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
 119                                    struct nlattr *est, char *n, int ovr,
 120                                    int bind);
 121int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
 122int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
 123int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
 124int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
 125#endif /* CONFIG_NET_CLS_ACT */
 126#endif
 127