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 133