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 }; 18 19 struct tc_action_ops; 20 21 struct tc_action { 22 const struct tc_action_ops *ops; 23 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ 24 __u32 order; 25 struct list_head list; 26 struct tcf_idrinfo *idrinfo; 27 28 u32 tcfa_index; 29 int tcfa_refcnt; 30 int tcfa_bindcnt; 31 u32 tcfa_capab; 32 int tcfa_action; 33 struct tcf_t tcfa_tm; 34 struct gnet_stats_basic_packed tcfa_bstats; 35 struct gnet_stats_queue tcfa_qstats; 36 struct net_rate_estimator __rcu *tcfa_rate_est; 37 spinlock_t tcfa_lock; 38 struct gnet_stats_basic_cpu __percpu *cpu_bstats; 39 struct gnet_stats_queue __percpu *cpu_qstats; 40 struct tc_cookie *act_cookie; 41 struct tcf_chain *goto_chain; 42 }; 43 #define tcf_index common.tcfa_index 44 #define tcf_refcnt common.tcfa_refcnt 45 #define tcf_bindcnt common.tcfa_bindcnt 46 #define tcf_capab common.tcfa_capab 47 #define tcf_action common.tcfa_action 48 #define tcf_tm common.tcfa_tm 49 #define tcf_bstats common.tcfa_bstats 50 #define tcf_qstats common.tcfa_qstats 51 #define tcf_rate_est common.tcfa_rate_est 52 #define tcf_lock common.tcfa_lock 53 54 /* Update lastuse only if needed, to avoid dirtying a cache line. 55 * We use a temp variable to avoid fetching jiffies twice. 56 */ 57 static inline void tcf_lastuse_update(struct tcf_t *tm) 58 { 59 unsigned long now = jiffies; 60 61 if (tm->lastuse != now) 62 tm->lastuse = now; 63 if (unlikely(!tm->firstuse)) 64 tm->firstuse = now; 65 } 66 67 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) 68 { 69 dtm->install = jiffies_to_clock_t(jiffies - stm->install); 70 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); 71 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse); 72 dtm->expires = jiffies_to_clock_t(stm->expires); 73 } 74 75 #ifdef CONFIG_NET_CLS_ACT 76 77 #define ACT_P_CREATED 1 78 #define ACT_P_DELETED 1 79 80 struct tc_action_ops { 81 struct list_head head; 82 char kind[IFNAMSIZ]; 83 __u32 type; /* TBD to match kind */ 84 size_t size; 85 struct module *owner; 86 int (*act)(struct sk_buff *, const struct tc_action *, 87 struct tcf_result *); 88 int (*dump)(struct sk_buff *, struct tc_action *, int, int); 89 void (*cleanup)(struct tc_action *); 90 int (*lookup)(struct net *, struct tc_action **, u32); 91 int (*init)(struct net *net, struct nlattr *nla, 92 struct nlattr *est, struct tc_action **act, int ovr, 93 int bind); 94 int (*walk)(struct net *, struct sk_buff *, 95 struct netlink_callback *, int, const struct tc_action_ops *); 96 void (*stats_update)(struct tc_action *, u64, u32, u64); 97 struct net_device *(*get_dev)(const struct tc_action *a); 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 list_head *net_list, 124 unsigned int id) 125 { 126 struct net *net; 127 128 rtnl_lock(); 129 list_for_each_entry(net, net_list, exit_list) { 130 struct tc_action_net *tn = net_generic(net, id); 131 132 tcf_idrinfo_destroy(tn->ops, tn->idrinfo); 133 kfree(tn->idrinfo); 134 } 135 rtnl_unlock(); 136 } 137 138 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, 139 struct netlink_callback *cb, int type, 140 const struct tc_action_ops *ops); 141 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); 142 bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, 143 int bind); 144 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, 145 struct tc_action **a, const struct tc_action_ops *ops, 146 int bind, bool cpustats); 147 void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est); 148 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); 149 150 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); 151 152 static inline int tcf_idr_release(struct tc_action *a, bool bind) 153 { 154 return __tcf_idr_release(a, bind, false); 155 } 156 157 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); 158 int tcf_unregister_action(struct tc_action_ops *a, 159 struct pernet_operations *ops); 160 int tcf_action_destroy(struct list_head *actions, int bind); 161 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, 162 int nr_actions, struct tcf_result *res); 163 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, 164 struct nlattr *est, char *name, int ovr, int bind, 165 struct list_head *actions); 166 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, 167 struct nlattr *nla, struct nlattr *est, 168 char *name, int ovr, int bind); 169 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); 170 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); 171 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); 172 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); 173 174 #endif /* CONFIG_NET_CLS_ACT */ 175 176 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, 177 u64 packets, u64 lastuse) 178 { 179 #ifdef CONFIG_NET_CLS_ACT 180 if (!a->ops->stats_update) 181 return; 182 183 a->ops->stats_update(a, bytes, packets, lastuse); 184 #endif 185 } 186 187 typedef int tc_setup_cb_t(enum tc_setup_type type, 188 void *type_data, void *cb_priv); 189 190 #ifdef CONFIG_NET_CLS_ACT 191 int tc_setup_cb_egdev_register(const struct net_device *dev, 192 tc_setup_cb_t *cb, void *cb_priv); 193 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 194 tc_setup_cb_t *cb, void *cb_priv); 195 int tc_setup_cb_egdev_call(const struct net_device *dev, 196 enum tc_setup_type type, void *type_data, 197 bool err_stop); 198 #else 199 static inline 200 int tc_setup_cb_egdev_register(const struct net_device *dev, 201 tc_setup_cb_t *cb, void *cb_priv) 202 { 203 return 0; 204 } 205 206 static inline 207 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 208 tc_setup_cb_t *cb, void *cb_priv) 209 { 210 } 211 212 static inline 213 int tc_setup_cb_egdev_call(const struct net_device *dev, 214 enum tc_setup_type type, void *type_data, 215 bool err_stop) 216 { 217 return 0; 218 } 219 #endif 220 221 #endif 222