1 #ifndef __NET_ACT_API_H 2 #define __NET_ACT_API_H 3 4 /* 5 * Public action API for classifiers/qdiscs 6 */ 7 8 #include <net/sch_generic.h> 9 #include <net/pkt_sched.h> 10 #include <net/net_namespace.h> 11 #include <net/netns/generic.h> 12 13 struct tcf_idrinfo { 14 spinlock_t lock; 15 struct idr action_idr; 16 }; 17 18 struct tc_action_ops; 19 20 struct tc_action { 21 const struct tc_action_ops *ops; 22 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 23 __u32 order; 24 struct list_head list; 25 struct tcf_idrinfo *idrinfo; 26 27 u32 tcfa_index; 28 int tcfa_refcnt; 29 int tcfa_bindcnt; 30 u32 tcfa_capab; 31 int tcfa_action; 32 struct tcf_t tcfa_tm; 33 struct gnet_stats_basic_packed tcfa_bstats; 34 struct gnet_stats_queue tcfa_qstats; 35 struct net_rate_estimator __rcu *tcfa_rate_est; 36 spinlock_t tcfa_lock; 37 struct gnet_stats_basic_cpu __percpu *cpu_bstats; 38 struct gnet_stats_queue __percpu *cpu_qstats; 39 struct tc_cookie *act_cookie; 40 struct tcf_chain *goto_chain; 41 }; 42 #define tcf_index common.tcfa_index 43 #define tcf_refcnt common.tcfa_refcnt 44 #define tcf_bindcnt common.tcfa_bindcnt 45 #define tcf_capab common.tcfa_capab 46 #define tcf_action common.tcfa_action 47 #define tcf_tm common.tcfa_tm 48 #define tcf_bstats common.tcfa_bstats 49 #define tcf_qstats common.tcfa_qstats 50 #define tcf_rate_est common.tcfa_rate_est 51 #define tcf_lock common.tcfa_lock 52 53 /* Update lastuse only if needed, to avoid dirtying a cache line. 54 * We use a temp variable to avoid fetching jiffies twice. 55 */ 56 static inline void tcf_lastuse_update(struct tcf_t *tm) 57 { 58 unsigned long now = jiffies; 59 60 if (tm->lastuse != now) 61 tm->lastuse = now; 62 if (unlikely(!tm->firstuse)) 63 tm->firstuse = now; 64 } 65 66 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) 67 { 68 dtm->install = jiffies_to_clock_t(jiffies - stm->install); 69 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); 70 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse); 71 dtm->expires = jiffies_to_clock_t(stm->expires); 72 } 73 74 #ifdef CONFIG_NET_CLS_ACT 75 76 #define ACT_P_CREATED 1 77 #define ACT_P_DELETED 1 78 79 struct tc_action_ops { 80 struct list_head head; 81 char kind[IFNAMSIZ]; 82 __u32 type; /* TBD to match kind */ 83 size_t size; 84 struct module *owner; 85 int (*act)(struct sk_buff *, const struct tc_action *, 86 struct tcf_result *); 87 int (*dump)(struct sk_buff *, struct tc_action *, int, int); 88 void (*cleanup)(struct tc_action *, int bind); 89 int (*lookup)(struct net *, struct tc_action **, u32); 90 int (*init)(struct net *net, struct nlattr *nla, 91 struct nlattr *est, struct tc_action **act, int ovr, 92 int bind); 93 int (*walk)(struct net *, struct sk_buff *, 94 struct netlink_callback *, int, const struct tc_action_ops *); 95 void (*stats_update)(struct tc_action *, u64, u32, u64); 96 int (*get_dev)(const struct tc_action *a, struct net *net, 97 struct net_device **mirred_dev); 98 }; 99 100 struct tc_action_net { 101 struct tcf_idrinfo *idrinfo; 102 const struct tc_action_ops *ops; 103 }; 104 105 static inline 106 int tc_action_net_init(struct tc_action_net *tn, 107 const struct tc_action_ops *ops) 108 { 109 int err = 0; 110 111 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); 112 if (!tn->idrinfo) 113 return -ENOMEM; 114 tn->ops = ops; 115 spin_lock_init(&tn->idrinfo->lock); 116 idr_init(&tn->idrinfo->action_idr); 117 return err; 118 } 119 120 void tcf_idrinfo_destroy(const struct tc_action_ops *ops, 121 struct tcf_idrinfo *idrinfo); 122 123 static inline void tc_action_net_exit(struct tc_action_net *tn) 124 { 125 tcf_idrinfo_destroy(tn->ops, tn->idrinfo); 126 kfree(tn->idrinfo); 127 } 128 129 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, 130 struct netlink_callback *cb, int type, 131 const struct tc_action_ops *ops); 132 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); 133 bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, 134 int bind); 135 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, 136 struct tc_action **a, const struct tc_action_ops *ops, 137 int bind, bool cpustats); 138 void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est); 139 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); 140 141 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); 142 143 static inline int tcf_idr_release(struct tc_action *a, bool bind) 144 { 145 return __tcf_idr_release(a, bind, false); 146 } 147 148 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); 149 int tcf_unregister_action(struct tc_action_ops *a, 150 struct pernet_operations *ops); 151 int tcf_action_destroy(struct list_head *actions, int bind); 152 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, 153 int nr_actions, struct tcf_result *res); 154 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, 155 struct nlattr *est, char *name, int ovr, int bind, 156 struct list_head *actions); 157 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, 158 struct nlattr *nla, struct nlattr *est, 159 char *name, int ovr, int bind); 160 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); 161 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); 162 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); 163 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); 164 165 #endif /* CONFIG_NET_CLS_ACT */ 166 167 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, 168 u64 packets, u64 lastuse) 169 { 170 #ifdef CONFIG_NET_CLS_ACT 171 if (!a->ops->stats_update) 172 return; 173 174 a->ops->stats_update(a, bytes, packets, lastuse); 175 #endif 176 } 177 178 #endif 179