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 <linux/refcount.h> 10 #include <net/sch_generic.h> 11 #include <net/pkt_sched.h> 12 #include <net/net_namespace.h> 13 #include <net/netns/generic.h> 14 15 struct tcf_idrinfo { 16 spinlock_t lock; 17 struct idr action_idr; 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 refcount_t tcfa_refcnt; 31 atomic_t 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 __rcu *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 *); 91 int (*lookup)(struct net *net, struct tc_action **a, u32 index, 92 struct netlink_ext_ack *extack); 93 int (*init)(struct net *net, struct nlattr *nla, 94 struct nlattr *est, struct tc_action **act, int ovr, 95 int bind, bool rtnl_held, 96 struct netlink_ext_ack *extack); 97 int (*walk)(struct net *, struct sk_buff *, 98 struct netlink_callback *, int, 99 const struct tc_action_ops *, 100 struct netlink_ext_ack *); 101 void (*stats_update)(struct tc_action *, u64, u32, u64); 102 size_t (*get_fill_size)(const struct tc_action *act); 103 struct net_device *(*get_dev)(const struct tc_action *a); 104 int (*delete)(struct net *net, u32 index); 105 }; 106 107 struct tc_action_net { 108 struct tcf_idrinfo *idrinfo; 109 const struct tc_action_ops *ops; 110 }; 111 112 static inline 113 int tc_action_net_init(struct tc_action_net *tn, 114 const struct tc_action_ops *ops) 115 { 116 int err = 0; 117 118 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); 119 if (!tn->idrinfo) 120 return -ENOMEM; 121 tn->ops = ops; 122 spin_lock_init(&tn->idrinfo->lock); 123 idr_init(&tn->idrinfo->action_idr); 124 return err; 125 } 126 127 void tcf_idrinfo_destroy(const struct tc_action_ops *ops, 128 struct tcf_idrinfo *idrinfo); 129 130 static inline void tc_action_net_exit(struct list_head *net_list, 131 unsigned int id) 132 { 133 struct net *net; 134 135 rtnl_lock(); 136 list_for_each_entry(net, net_list, exit_list) { 137 struct tc_action_net *tn = net_generic(net, id); 138 139 tcf_idrinfo_destroy(tn->ops, tn->idrinfo); 140 kfree(tn->idrinfo); 141 } 142 rtnl_unlock(); 143 } 144 145 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, 146 struct netlink_callback *cb, int type, 147 const struct tc_action_ops *ops, 148 struct netlink_ext_ack *extack); 149 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); 150 bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, 151 int bind); 152 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, 153 struct tc_action **a, const struct tc_action_ops *ops, 154 int bind, bool cpustats); 155 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); 156 157 void tcf_idr_cleanup(struct tc_action_net *tn, u32 index); 158 int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index, 159 struct tc_action **a, int bind); 160 int tcf_idr_delete_index(struct tc_action_net *tn, u32 index); 161 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); 162 163 static inline int tcf_idr_release(struct tc_action *a, bool bind) 164 { 165 return __tcf_idr_release(a, bind, false); 166 } 167 168 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); 169 int tcf_unregister_action(struct tc_action_ops *a, 170 struct pernet_operations *ops); 171 int tcf_action_destroy(struct tc_action *actions[], int bind); 172 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, 173 int nr_actions, struct tcf_result *res); 174 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, 175 struct nlattr *est, char *name, int ovr, int bind, 176 struct tc_action *actions[], size_t *attr_size, 177 bool rtnl_held, struct netlink_ext_ack *extack); 178 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, 179 struct nlattr *nla, struct nlattr *est, 180 char *name, int ovr, int bind, 181 bool rtnl_held, 182 struct netlink_ext_ack *extack); 183 int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind, 184 int ref); 185 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); 186 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); 187 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); 188 189 #endif /* CONFIG_NET_CLS_ACT */ 190 191 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, 192 u64 packets, u64 lastuse) 193 { 194 #ifdef CONFIG_NET_CLS_ACT 195 if (!a->ops->stats_update) 196 return; 197 198 a->ops->stats_update(a, bytes, packets, lastuse); 199 #endif 200 } 201 202 #ifdef CONFIG_NET_CLS_ACT 203 int tc_setup_cb_egdev_register(const struct net_device *dev, 204 tc_setup_cb_t *cb, void *cb_priv); 205 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 206 tc_setup_cb_t *cb, void *cb_priv); 207 int tc_setup_cb_egdev_call(const struct net_device *dev, 208 enum tc_setup_type type, void *type_data, 209 bool err_stop); 210 #else 211 static inline 212 int tc_setup_cb_egdev_register(const struct net_device *dev, 213 tc_setup_cb_t *cb, void *cb_priv) 214 { 215 return 0; 216 } 217 218 static inline 219 void tc_setup_cb_egdev_unregister(const struct net_device *dev, 220 tc_setup_cb_t *cb, void *cb_priv) 221 { 222 } 223 224 static inline 225 int tc_setup_cb_egdev_call(const struct net_device *dev, 226 enum tc_setup_type type, void *type_data, 227 bool err_stop) 228 { 229 return 0; 230 } 231 #endif 232 233 #endif 234