1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __NET_ACT_API_H 3 #define __NET_ACT_API_H 4 5 /* 6 * Public action API for classifiers/qdiscs 7 */ 8 9 #include <net/sch_generic.h> 10 #include <net/pkt_sched.h> 11 #include <net/net_namespace.h> 12 #include <net/netns/generic.h> 13 14 struct tcf_idrinfo { 15 spinlock_t lock; 16 struct idr action_idr; 17 struct net *net; 18 }; 19 20 struct tc_action_ops; 21 22 struct tc_action { 23 const struct tc_action_ops *ops; 24 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 25 __u32 order; 26 struct list_head list; 27 struct tcf_idrinfo *idrinfo; 28 29 u32 tcfa_index; 30 int tcfa_refcnt; 31 int tcfa_bindcnt; 32 u32 tcfa_capab; 33 int tcfa_action; 34 struct tcf_t tcfa_tm; 35 struct gnet_stats_basic_packed tcfa_bstats; 36 struct gnet_stats_queue tcfa_qstats; 37 struct net_rate_estimator __rcu *tcfa_rate_est; 38 spinlock_t tcfa_lock; 39 struct gnet_stats_basic_cpu __percpu *cpu_bstats; 40 struct gnet_stats_queue __percpu *cpu_qstats; 41 struct tc_cookie *act_cookie; 42 struct tcf_chain *goto_chain; 43 }; 44 #define tcf_index common.tcfa_index 45 #define tcf_refcnt common.tcfa_refcnt 46 #define tcf_bindcnt common.tcfa_bindcnt 47 #define tcf_capab common.tcfa_capab 48 #define tcf_action common.tcfa_action 49 #define tcf_tm common.tcfa_tm 50 #define tcf_bstats common.tcfa_bstats 51 #define tcf_qstats common.tcfa_qstats 52 #define tcf_rate_est common.tcfa_rate_est 53 #define tcf_lock common.tcfa_lock 54 55 /* Update lastuse only if needed, to avoid dirtying a cache line. 56 * We use a temp variable to avoid fetching jiffies twice. 57 */ 58 static inline void tcf_lastuse_update(struct tcf_t *tm) 59 { 60 unsigned long now = jiffies; 61 62 if (tm->lastuse != now) 63 tm->lastuse = now; 64 if (unlikely(!tm->firstuse)) 65 tm->firstuse = now; 66 } 67 68 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) 69 { 70 dtm->install = jiffies_to_clock_t(jiffies - stm->install); 71 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); 72 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse); 73 dtm->expires = jiffies_to_clock_t(stm->expires); 74 } 75 76 #ifdef CONFIG_NET_CLS_ACT 77 78 #define ACT_P_CREATED 1 79 #define ACT_P_DELETED 1 80 81 struct tc_action_ops { 82 struct list_head head; 83 char kind[IFNAMSIZ]; 84 __u32 type; /* TBD to match kind */ 85 size_t size; 86 struct module *owner; 87 int (*act)(struct sk_buff *, const struct tc_action *, 88 struct tcf_result *); 89 int (*dump)(struct sk_buff *, struct tc_action *, int, int); 90 void (*cleanup)(struct tc_action *, int bind); 91 int (*lookup)(struct net *, struct tc_action **, u32); 92 int (*init)(struct net *net, struct nlattr *nla, 93 struct nlattr *est, struct tc_action **act, int ovr, 94 int bind); 95 int (*walk)(struct net *, struct sk_buff *, 96 struct netlink_callback *, int, const struct tc_action_ops *); 97 void (*stats_update)(struct tc_action *, u64, u32, u64); 98 struct net_device *(*get_dev)(const struct tc_action *a); 99 }; 100 101 struct tc_action_net { 102 struct tcf_idrinfo *idrinfo; 103 const struct tc_action_ops *ops; 104 }; 105 106 static inline 107 int tc_action_net_init(struct tc_action_net *tn, 108 const struct tc_action_ops *ops, struct net *net) 109 { 110 int err = 0; 111 112 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); 113 if (!tn->idrinfo) 114 return -ENOMEM; 115 tn->ops = ops; 116 tn->idrinfo->net = net; 117 spin_lock_init(&tn->idrinfo->lock); 118 idr_init(&tn->idrinfo->action_idr); 119 return err; 120 } 121 122 void tcf_idrinfo_destroy(const struct tc_action_ops *ops, 123 struct tcf_idrinfo *idrinfo); 124 125 static inline void tc_action_net_exit(struct tc_action_net *tn) 126 { 127 rtnl_lock(); 128 tcf_idrinfo_destroy(tn->ops, tn->idrinfo); 129 rtnl_unlock(); 130 kfree(tn->idrinfo); 131 } 132 133 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, 134 struct netlink_callback *cb, int type, 135 const struct tc_action_ops *ops); 136 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); 137 bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, 138 int bind); 139 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, 140 struct tc_action **a, const struct tc_action_ops *ops, 141 int bind, bool cpustats); 142 void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est); 143 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); 144 145 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); 146 147 static inline int tcf_idr_release(struct tc_action *a, bool bind) 148 { 149 return __tcf_idr_release(a, bind, false); 150 } 151 152 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); 153 int tcf_unregister_action(struct tc_action_ops *a, 154 struct pernet_operations *ops); 155 int tcf_action_destroy(struct list_head *actions, int bind); 156 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, 157 int nr_actions, struct tcf_result *res); 158 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, 159 struct nlattr *est, char *name, int ovr, int bind, 160 struct list_head *actions); 161 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, 162 struct nlattr *nla, struct nlattr *est, 163 char *name, int ovr, int bind); 164 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); 165 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); 166 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); 167 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); 168 169 #endif /* CONFIG_NET_CLS_ACT */ 170 171 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, 172 u64 packets, u64 lastuse) 173 { 174 #ifdef CONFIG_NET_CLS_ACT 175 if (!a->ops->stats_update) 176 return; 177 178 a->ops->stats_update(a, bytes, packets, lastuse); 179 #endif 180 } 181 182 typedef int tc_setup_cb_t(enum tc_setup_type type, 183 void *type_data, void *cb_priv); 184 185 #ifdef CONFIG_NET_CLS_ACT 186 int tc_setup_cb_egdev_register(const struct net_device *dev, 187 tc_setup_cb_t *cb, void *cb_priv); 188 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 189 tc_setup_cb_t *cb, void *cb_priv); 190 int tc_setup_cb_egdev_call(const struct net_device *dev, 191 enum tc_setup_type type, void *type_data, 192 bool err_stop); 193 #else 194 static inline 195 int tc_setup_cb_egdev_register(const struct net_device *dev, 196 tc_setup_cb_t *cb, void *cb_priv) 197 { 198 return 0; 199 } 200 201 static inline 202 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 203 tc_setup_cb_t *cb, void *cb_priv) 204 { 205 } 206 207 static inline 208 int tc_setup_cb_egdev_call(const struct net_device *dev, 209 enum tc_setup_type type, void *type_data, 210 bool err_stop) 211 { 212 return 0; 213 } 214 #endif 215 216 #endif 217