1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NET_ACT_API_H
3 #define __NET_ACT_API_H
6 * Public action API for classifiers/qdiscs
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>
17 struct idr action_idr;
23 const struct tc_action_ops *ops;
24 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
26 struct tcf_idrinfo *idrinfo;
29 refcount_t tcfa_refcnt;
30 atomic_t tcfa_bindcnt;
33 struct gnet_stats_basic_packed tcfa_bstats;
34 struct gnet_stats_queue tcfa_qstats;
35 struct net_rate_estimator __rcu *tcfa_rate_est;
37 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
38 struct gnet_stats_queue __percpu *cpu_qstats;
39 struct tc_cookie __rcu *act_cookie;
40 struct tcf_chain *goto_chain;
42 #define tcf_index common.tcfa_index
43 #define tcf_refcnt common.tcfa_refcnt
44 #define tcf_bindcnt common.tcfa_bindcnt
45 #define tcf_action common.tcfa_action
46 #define tcf_tm common.tcfa_tm
47 #define tcf_bstats common.tcfa_bstats
48 #define tcf_qstats common.tcfa_qstats
49 #define tcf_rate_est common.tcfa_rate_est
50 #define tcf_lock common.tcfa_lock
52 /* Update lastuse only if needed, to avoid dirtying a cache line.
53 * We use a temp variable to avoid fetching jiffies twice.
55 static inline void tcf_lastuse_update(struct tcf_t *tm)
57 unsigned long now = jiffies;
59 if (tm->lastuse != now)
61 if (unlikely(!tm->firstuse))
65 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
67 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
68 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
69 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
70 dtm->expires = jiffies_to_clock_t(stm->expires);
73 #ifdef CONFIG_NET_CLS_ACT
75 #define ACT_P_CREATED 1
76 #define ACT_P_DELETED 1
78 struct tc_action_ops {
79 struct list_head head;
81 __u32 type; /* TBD to match kind */
84 int (*act)(struct sk_buff *, const struct tc_action *,
85 struct tcf_result *); /* called under RCU BH lock*/
86 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
87 void (*cleanup)(struct tc_action *);
88 int (*lookup)(struct net *net, struct tc_action **a, u32 index,
89 struct netlink_ext_ack *extack);
90 int (*init)(struct net *net, struct nlattr *nla,
91 struct nlattr *est, struct tc_action **act, int ovr,
92 int bind, bool rtnl_held,
93 struct netlink_ext_ack *extack);
94 int (*walk)(struct net *, struct sk_buff *,
95 struct netlink_callback *, int,
96 const struct tc_action_ops *,
97 struct netlink_ext_ack *);
98 void (*stats_update)(struct tc_action *, u64, u32, u64);
99 size_t (*get_fill_size)(const struct tc_action *act);
100 struct net_device *(*get_dev)(const struct tc_action *a);
101 void (*put_dev)(struct net_device *dev);
104 struct tc_action_net {
105 struct tcf_idrinfo *idrinfo;
106 const struct tc_action_ops *ops;
110 int tc_action_net_init(struct tc_action_net *tn,
111 const struct tc_action_ops *ops)
115 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
119 spin_lock_init(&tn->idrinfo->lock);
120 idr_init(&tn->idrinfo->action_idr);
124 void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
125 struct tcf_idrinfo *idrinfo);
127 static inline void tc_action_net_exit(struct list_head *net_list,
133 list_for_each_entry(net, net_list, exit_list) {
134 struct tc_action_net *tn = net_generic(net, id);
136 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
142 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
143 struct netlink_callback *cb, int type,
144 const struct tc_action_ops *ops,
145 struct netlink_ext_ack *extack);
146 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
147 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
148 struct tc_action **a, const struct tc_action_ops *ops,
149 int bind, bool cpustats);
150 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
152 void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
153 int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
154 struct tc_action **a, int bind);
155 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
157 static inline int tcf_idr_release(struct tc_action *a, bool bind)
159 return __tcf_idr_release(a, bind, false);
162 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
163 int tcf_unregister_action(struct tc_action_ops *a,
164 struct pernet_operations *ops);
165 int tcf_action_destroy(struct tc_action *actions[], int bind);
166 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
167 int nr_actions, struct tcf_result *res);
168 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
169 struct nlattr *est, char *name, int ovr, int bind,
170 struct tc_action *actions[], size_t *attr_size,
171 bool rtnl_held, struct netlink_ext_ack *extack);
172 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
173 struct nlattr *nla, struct nlattr *est,
174 char *name, int ovr, int bind,
176 struct netlink_ext_ack *extack);
177 int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
179 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
180 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
181 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
183 #endif /* CONFIG_NET_CLS_ACT */
185 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
186 u64 packets, u64 lastuse)
188 #ifdef CONFIG_NET_CLS_ACT
189 if (!a->ops->stats_update)
192 a->ops->stats_update(a, bytes, packets, lastuse);
196 #ifdef CONFIG_NET_CLS_ACT
197 int tc_setup_cb_egdev_register(const struct net_device *dev,
198 tc_setup_cb_t *cb, void *cb_priv);
199 void tc_setup_cb_egdev_unregister(const struct net_device *dev,
200 tc_setup_cb_t *cb, void *cb_priv);
201 int tc_setup_cb_egdev_call(const struct net_device *dev,
202 enum tc_setup_type type, void *type_data,
206 int tc_setup_cb_egdev_register(const struct net_device *dev,
207 tc_setup_cb_t *cb, void *cb_priv)
213 void tc_setup_cb_egdev_unregister(const struct net_device *dev,
214 tc_setup_cb_t *cb, void *cb_priv)
219 int tc_setup_cb_egdev_call(const struct net_device *dev,
220 enum tc_setup_type type, void *type_data,