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 struct gnet_stats_basic_cpu __percpu *cpu_bstats; 25 struct gnet_stats_queue __percpu *cpu_qstats; 26 }; 27 #define tcf_head common.tcfc_head 28 #define tcf_index common.tcfc_index 29 #define tcf_refcnt common.tcfc_refcnt 30 #define tcf_bindcnt common.tcfc_bindcnt 31 #define tcf_capab common.tcfc_capab 32 #define tcf_action common.tcfc_action 33 #define tcf_tm common.tcfc_tm 34 #define tcf_bstats common.tcfc_bstats 35 #define tcf_qstats common.tcfc_qstats 36 #define tcf_rate_est common.tcfc_rate_est 37 #define tcf_lock common.tcfc_lock 38 #define tcf_rcu common.tcfc_rcu 39 40 struct tcf_hashinfo { 41 struct hlist_head *htab; 42 unsigned int hmask; 43 spinlock_t lock; 44 u32 index; 45 }; 46 47 static inline unsigned int tcf_hash(u32 index, unsigned int hmask) 48 { 49 return index & hmask; 50 } 51 52 static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask) 53 { 54 int i; 55 56 spin_lock_init(&hf->lock); 57 hf->index = 0; 58 hf->hmask = mask; 59 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head), 60 GFP_KERNEL); 61 if (!hf->htab) 62 return -ENOMEM; 63 for (i = 0; i < mask + 1; i++) 64 INIT_HLIST_HEAD(&hf->htab[i]); 65 return 0; 66 } 67 68 static inline void tcf_hashinfo_destroy(struct tcf_hashinfo *hf) 69 { 70 kfree(hf->htab); 71 } 72 73 /* Update lastuse only if needed, to avoid dirtying a cache line. 74 * We use a temp variable to avoid fetching jiffies twice. 75 */ 76 static inline void tcf_lastuse_update(struct tcf_t *tm) 77 { 78 unsigned long now = jiffies; 79 80 if (tm->lastuse != now) 81 tm->lastuse = now; 82 } 83 84 #ifdef CONFIG_NET_CLS_ACT 85 86 #define ACT_P_CREATED 1 87 #define ACT_P_DELETED 1 88 89 struct tc_action { 90 void *priv; 91 const struct tc_action_ops *ops; 92 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 93 __u32 order; 94 struct list_head list; 95 }; 96 97 struct tc_action_ops { 98 struct list_head head; 99 struct tcf_hashinfo *hinfo; 100 char kind[IFNAMSIZ]; 101 __u32 type; /* TBD to match kind */ 102 struct module *owner; 103 int (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *); 104 int (*dump)(struct sk_buff *, struct tc_action *, int, int); 105 void (*cleanup)(struct tc_action *, int bind); 106 int (*lookup)(struct tc_action *, u32); 107 int (*init)(struct net *net, struct nlattr *nla, 108 struct nlattr *est, struct tc_action *act, int ovr, 109 int bind); 110 int (*walk)(struct sk_buff *, struct netlink_callback *, int, struct tc_action *); 111 }; 112 113 int tcf_hash_search(struct tc_action *a, u32 index); 114 u32 tcf_hash_new_index(struct tcf_hashinfo *hinfo); 115 int tcf_hash_check(u32 index, struct tc_action *a, int bind); 116 int tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a, 117 int size, int bind, bool cpustats); 118 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est); 119 void tcf_hash_insert(struct tc_action *a); 120 121 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict); 122 123 static inline int tcf_hash_release(struct tc_action *a, bool bind) 124 { 125 return __tcf_hash_release(a, bind, false); 126 } 127 128 int tcf_register_action(struct tc_action_ops *a, unsigned int mask); 129 int tcf_unregister_action(struct tc_action_ops *a); 130 int tcf_action_destroy(struct list_head *actions, int bind); 131 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions, 132 struct tcf_result *res); 133 int tcf_action_init(struct net *net, struct nlattr *nla, 134 struct nlattr *est, char *n, int ovr, 135 int bind, struct list_head *); 136 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla, 137 struct nlattr *est, char *n, int ovr, 138 int bind); 139 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); 140 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); 141 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); 142 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); 143 #endif /* CONFIG_NET_CLS_ACT */ 144 #endif 145