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_lock;
  23 };
  24 #define tcf_next        common.tcfc_next
  25 #define tcf_index       common.tcfc_index
  26 #define tcf_refcnt      common.tcfc_refcnt
  27 #define tcf_bindcnt     common.tcfc_bindcnt
  28 #define tcf_capab       common.tcfc_capab
  29 #define tcf_action      common.tcfc_action
  30 #define tcf_tm          common.tcfc_tm
  31 #define tcf_bstats      common.tcfc_bstats
  32 #define tcf_qstats      common.tcfc_qstats
  33 #define tcf_rate_est    common.tcfc_rate_est
  34 #define tcf_lock        common.tcfc_lock
  35
  36 struct tcf_police {
  37         struct tcf_common       common;
  38         int                     tcfp_result;
  39         u32                     tcfp_ewma_rate;
  40         u32                     tcfp_burst;
  41         u32                     tcfp_mtu;
  42         u32                     tcfp_toks;
  43         u32                     tcfp_ptoks;
  44         psched_time_t           tcfp_t_c;
  45         struct qdisc_rate_table *tcfp_R_tab;
  46         struct qdisc_rate_table *tcfp_P_tab;
  47 };
  48 #define to_police(pc)   \
  49         container_of(pc, struct tcf_police, common)
  50
  51 struct tcf_hashinfo {
  52         struct tcf_common       **htab;
  53         unsigned int            hmask;
  54         rwlock_t                *lock;
  55 };
  56
  57 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
  58 {
  59         return index & hmask;
  60 }
  61
  62 #ifdef CONFIG_NET_CLS_ACT
  63
  64 #define ACT_P_CREATED 1
  65 #define ACT_P_DELETED 1
  66
  67 struct tcf_act_hdr {
  68         struct tcf_common       common;
  69 };
  70
  71 struct tc_action {
  72         void                    *priv;
  73         struct tc_action_ops    *ops;
  74         __u32                   type; /* for backward compat(TCA_OLD_COMPAT) */
  75         __u32                   order;
  76         struct tc_action        *next;
  77 };
  78
  79 #define TCA_CAP_NONE 0
  80 struct tc_action_ops {
  81         struct tc_action_ops *next;
  82         struct tcf_hashinfo *hinfo;
  83         char    kind[IFNAMSIZ];
  84         __u32   type; /* TBD to match kind */
  85         __u32   capab;  /* capabilities includes 4 bit version */
  86         struct module           *owner;
  87         int     (*act)(struct sk_buff *, struct tc_action *, struct tcf_result *);
  88         int     (*get_stats)(struct sk_buff *, struct tc_action *);
  89         int     (*dump)(struct sk_buff *, struct tc_action *, int, int);
  90         int     (*cleanup)(struct tc_action *, int bind);
  91         int     (*lookup)(struct tc_action *, u32);
  92         int     (*init)(struct rtattr *, struct rtattr *, struct tc_action *, int , int);
  93         int     (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *);
  94 };
  95
  96 extern struct tcf_common *tcf_hash_lookup(u32 index,
  97                                           struct tcf_hashinfo *hinfo);
  98 extern void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo);
  99 extern int tcf_hash_release(struct tcf_common *p, int bind,
 100                             struct tcf_hashinfo *hinfo);
 101 extern int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
 102                               int type, struct tc_action *a);
 103 extern u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo);
 104 extern int tcf_hash_search(struct tc_action *a, u32 index);
 105 extern struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a,
 106                                          int bind, struct tcf_hashinfo *hinfo);
 107 extern struct tcf_common *tcf_hash_create(u32 index, struct rtattr *est,
 108                                           struct tc_action *a, int size,
 109                                           int bind, u32 *idx_gen,
 110                                           struct tcf_hashinfo *hinfo);
 111 extern void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo);
 112
 113 extern int tcf_register_action(struct tc_action_ops *a);
 114 extern int tcf_unregister_action(struct tc_action_ops *a);
 115 extern void tcf_action_destroy(struct tc_action *a, int bind);
 116 extern int tcf_action_exec(struct sk_buff *skb, struct tc_action *a, struct tcf_result *res);
 117 extern struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
 118 extern struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est, char *n, int ovr, int bind, int *err);
 119 extern int tcf_action_dump(struct sk_buff *skb, struct tc_action *a, int, int);
 120 extern int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
 121 extern int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
 122 extern int tcf_action_copy_stats (struct sk_buff *,struct tc_action *, int);
 123 #endif /* CONFIG_NET_CLS_ACT */
 124
 125 extern int tcf_police(struct sk_buff *skb, struct tcf_police *p);
 126 extern void tcf_police_destroy(struct tcf_police *p);
 127 extern struct tcf_police * tcf_police_locate(struct rtattr *rta, struct rtattr *est);
 128 extern int tcf_police_dump(struct sk_buff *skb, struct tcf_police *p);
 129 extern int tcf_police_dump_stats(struct sk_buff *skb, struct tcf_police *p);
 130
 131 static inline int
 132 tcf_police_release(struct tcf_police *p, int bind)
 133 {
 134         int ret = 0;
 135 #ifdef CONFIG_NET_CLS_ACT
 136         if (p) {
 137                 if (bind)
 138                         p->tcf_bindcnt--;
 139
 140                 p->tcf_refcnt--;
 141                 if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
 142                         tcf_police_destroy(p);
 143                         ret = 1;
 144                 }
 145         }
 146 #else
 147         if (p && --p->tcf_refcnt == 0)
 148                 tcf_police_destroy(p);
 149
 150 #endif /* CONFIG_NET_CLS_ACT */
 151         return ret;
 152 }
 153
 154 #endif