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 }; 43 44 static inline unsigned int tcf_hash(u32 index, unsigned int hmask) 45 { 46 return index & hmask; 47 } 48 49 static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask) 50 { 51 int i; 52 53 spin_lock_init(&hf->lock); 54 hf->hmask = mask; 55 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head), 56 GFP_KERNEL); 57 if (!hf->htab) 58 return -ENOMEM; 59 for (i = 0; i < mask + 1; i++) 60 INIT_HLIST_HEAD(&hf->htab[i]); 61 return 0; 62 } 63 64 static inline void tcf_hashinfo_destroy(struct tcf_hashinfo *hf) 65 { 66 kfree(hf->htab); 67 } 68 69 #ifdef CONFIG_NET_CLS_ACT 70 71 #define ACT_P_CREATED 1 72 #define ACT_P_DELETED 1 73 74 struct tcf_act_hdr { 75 struct tcf_common common; 76 }; 77 78 struct tc_action { 79 void *priv; 80 const struct tc_action_ops *ops; 81 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 82 __u32 order; 83 struct list_head list; 84 }; 85 86 #define TCA_CAP_NONE 0 87 struct tc_action_ops { 88 struct list_head head; 89 struct tcf_hashinfo *hinfo; 90 char kind[IFNAMSIZ]; 91 __u32 type; /* TBD to match kind */ 92 __u32 capab; /* capabilities includes 4 bit version */ 93 struct module *owner; 94 int (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *); 95 int (*dump)(struct sk_buff *, struct tc_action *, int, int); 96 int (*cleanup)(struct tc_action *, int bind); 97 int (*lookup)(struct tc_action *, u32); 98 int (*init)(struct net *net, struct nlattr *nla, 99 struct nlattr *est, struct tc_action *act, int ovr, 100 int bind); 101 int (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *); 102 }; 103 104 struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo); 105 void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo); 106 int tcf_hash_release(struct tcf_common *p, int bind, 107 struct tcf_hashinfo *hinfo); 108 int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb, 109 int type, struct tc_action *a); 110 u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo); 111 int tcf_hash_search(struct tc_action *a, u32 index); 112 struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a, 113 int bind, struct tcf_hashinfo *hinfo); 114 struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est, 115 struct tc_action *a, int size, 116 int bind, u32 *idx_gen, 117 struct tcf_hashinfo *hinfo); 118 void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo); 119 120 int tcf_register_action(struct tc_action_ops *a); 121 int tcf_unregister_action(struct tc_action_ops *a); 122 void tcf_action_destroy(struct list_head *actions, int bind); 123 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions, 124 struct tcf_result *res); 125 int tcf_action_init(struct net *net, struct nlattr *nla, 126 struct nlattr *est, char *n, int ovr, 127 int bind, struct list_head *); 128 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, 129 struct nlattr *est, char *n, int ovr, 130 int bind); 131 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); 132 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); 133 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); 134 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); 135 #endif /* CONFIG_NET_CLS_ACT */ 136 #endif 137