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 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         tcfc_bstats;
  20         struct gnet_stats_queue         tcfc_qstats;
  21         struct gnet_stats_rate_est      tcfc_rate_est;
  22         spinlock_t                      *tcfc_stats_lock;
  23         spinlock_t                      tcfc_lock;
  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_stats_lock  common.tcfc_stats_lock
  36 #define tcf_lock        common.tcfc_lock
  37
  38 struct tcf_police {
  39         struct tcf_common       common;
  40         int                     tcfp_result;
  41         u32                     tcfp_ewma_rate;
  42         u32                     tcfp_burst;
  43         u32                     tcfp_mtu;
  44         u32                     tcfp_toks;
  45         u32                     tcfp_ptoks;
  46         psched_time_t           tcfp_t_c;
  47         struct qdisc_rate_table *tcfp_R_tab;
  48         struct qdisc_rate_table *tcfp_P_tab;
  49 };
  50 #define to_police(pc)   \
  51         container_of(pc, struct tcf_police, common)
  52
  53 struct tcf_hashinfo {
  54         struct tcf_common       **htab;
  55         unsigned int            hmask;
  56         rwlock_t                *lock;
  57 };
  58
  59 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
  60 {
  61         return index & hmask;
  62 }
  63
  64 #ifdef CONFIG_NET_CLS_ACT
  65
  66 #define ACT_P_CREATED 1
  67 #define ACT_P_DELETED 1
  68
  69 struct tcf_act_hdr {
  70         struct tcf_common       common;
  71 };
  72
  73 struct tc_action {
  74         void                    *priv;
  75         struct tc_action_ops    *ops;
  76         __u32                   type; /* for backward compat(TCA_OLD_COMPAT) */
  77         __u32                   order;
  78         struct tc_action        *next;
  79 };
  80
  81 #define TCA_CAP_NONE 0
  82 struct tc_action_ops {
  83         struct tc_action_ops *next;
  84         struct tcf_hashinfo *hinfo;
  85         char    kind[IFNAMSIZ];
  86         __u32   type; /* TBD to match kind */
  87         __u32   capab;  /* capabilities includes 4 bit version */
  88         struct module           *owner;
  89         int     (*act)(struct sk_buff *, struct tc_action *, struct tcf_result *);
  90         int     (*get_stats)(struct sk_buff *, struct tc_action *);
  91         int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
  92         int     (*cleanup)(struct tc_action *, int bind);
  93         int     (*lookup)(struct tc_action *, u32);
  94         int     (*init)(struct rtattr *, struct rtattr *, struct tc_action *, int , int);
  95         int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
  96 };
  97
  98 extern struct tcf_common *tcf_hash_lookup(u32 index,
  99                                           struct tcf_hashinfo *hinfo);
 100 extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 101 extern int tcf_hash_release(struct tcf_common *p, int bind,
 102                             struct tcf_hashinfo *hinfo);
 103 extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
 104                               int type, struct tc_action *a);
 105 extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
 106 extern int tcf_hash_search(struct tc_action *a, u32 index);
 107 extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
 108                                          int bind, struct tcf_hashinfo *hinfo);
 109 extern struct tcf_common *tcf_hash_create(u32 index, struct rtattr *est,
 110                                           struct tc_action *a, int size,
 111                                           int bind, u32 *idx_gen,
 112                                           struct tcf_hashinfo *hinfo);
 113 extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 114
 115 extern int tcf_register_action(struct tc_action_ops *a);
 116 extern int tcf_unregister_action(struct tc_action_ops *a);
 117 extern void tcf_action_destroy(struct tc_action *a, int bind);
 118 extern int tcf_action_exec(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res);
 119 extern struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
 120 extern struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
 121 extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
 122 extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
 123 extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
 124 extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
 125 #endif /* CONFIG_NET_CLS_ACT */
 126
 127 extern int tcf_police(struct sk_buff *skb, struct tcf_police *p);
 128 extern void tcf_police_destroy(struct tcf_police *p);
 129 extern struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est);
 130 extern int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p);
 131 extern int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *p);
 132
 133 static inline int
 134 tcf_police_release(struct tcf_police *p, int bind)
 135 {
 136         int ret = 0;
 137 #ifdef CONFIG_NET_CLS_ACT
 138         if (p) {
 139                 if (bind)
 140                         p->tcf_bindcnt--;
 141
 142                 p->tcf_refcnt--;
 143                 if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
 144                         tcf_police_destroy(p);
 145                         ret = 1;
 146                 }
 147         }
 148 #else
 149         if (p && --p->tcf_refcnt == 0)
 150                 tcf_police_destroy(p);
 151
 152 #endif /* CONFIG_NET_CLS_ACT */
 153         return ret;
 154 }
 155
 156 #endif