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 struct net_device *(*get_dev)(const struct tc_action *a); 97 }; 98 99 struct tc_action_net { 100 struct tcf_idrinfo *idrinfo; 101 const struct tc_action_ops *ops; 102 }; 103 104 static inline 105 int tc_action_net_init(struct tc_action_net *tn, 106 const struct tc_action_ops *ops) 107 { 108 int err = 0; 109 110 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); 111 if (!tn->idrinfo) 112 return -ENOMEM; 113 tn->ops = ops; 114 spin_lock_init(&tn->idrinfo->lock); 115 idr_init(&tn->idrinfo->action_idr); 116 return err; 117 } 118 119 void tcf_idrinfo_destroy(const struct tc_action_ops *ops, 120 struct tcf_idrinfo *idrinfo); 121 122 static inline void tc_action_net_exit(struct tc_action_net *tn) 123 { 124 tcf_idrinfo_destroy(tn->ops, tn->idrinfo); 125 kfree(tn->idrinfo); 126 } 127 128 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, 129 struct netlink_callback *cb, int type, 130 const struct tc_action_ops *ops); 131 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); 132 bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, 133 int bind); 134 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, 135 struct tc_action **a, const struct tc_action_ops *ops, 136 int bind, bool cpustats); 137 void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est); 138 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); 139 140 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); 141 142 static inline int tcf_idr_release(struct tc_action *a, bool bind) 143 { 144 return __tcf_idr_release(a, bind, false); 145 } 146 147 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); 148 int tcf_unregister_action(struct tc_action_ops *a, 149 struct pernet_operations *ops); 150 int tcf_action_destroy(struct list_head *actions, int bind); 151 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, 152 int nr_actions, struct tcf_result *res); 153 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, 154 struct nlattr *est, char *name, int ovr, int bind, 155 struct list_head *actions); 156 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, 157 struct nlattr *nla, struct nlattr *est, 158 char *name, int ovr, int bind); 159 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); 160 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); 161 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); 162 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); 163 164 #endif /* CONFIG_NET_CLS_ACT */ 165 166 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, 167 u64 packets, u64 lastuse) 168 { 169 #ifdef CONFIG_NET_CLS_ACT 170 if (!a->ops->stats_update) 171 return; 172 173 a->ops->stats_update(a, bytes, packets, lastuse); 174 #endif 175 } 176 177 typedef int tc_setup_cb_t(enum tc_setup_type type, 178 void *type_data, void *cb_priv); 179 180 #ifdef CONFIG_NET_CLS_ACT 181 int tc_setup_cb_egdev_register(const struct net_device *dev, 182 tc_setup_cb_t *cb, void *cb_priv); 183 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 184 tc_setup_cb_t *cb, void *cb_priv); 185 int tc_setup_cb_egdev_call(const struct net_device *dev, 186 enum tc_setup_type type, void *type_data, 187 bool err_stop); 188 #else 189 static inline 190 int tc_setup_cb_egdev_register(const struct net_device *dev, 191 tc_setup_cb_t *cb, void *cb_priv) 192 { 193 return 0; 194 } 195 196 static inline 197 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 198 tc_setup_cb_t *cb, void *cb_priv) 199 { 200 } 201 202 static inline 203 int tc_setup_cb_egdev_call(const struct net_device *dev, 204 enum tc_setup_type type, void *type_data, 205 bool err_stop) 206 { 207 return 0; 208 } 209 #endif 210 211 #endif 212