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 <net/sch_generic.h>
10 #include <net/pkt_sched.h>
11 #include <net/net_namespace.h>
12 #include <net/netns/generic.h>
16 struct idr action_idr;
23 const struct tc_action_ops *ops;
24 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
26 struct list_head list;
27 struct tcf_idrinfo *idrinfo;
35 struct gnet_stats_basic_packed tcfa_bstats;
36 struct gnet_stats_queue tcfa_qstats;
37 struct net_rate_estimator __rcu *tcfa_rate_est;
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;
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
55 /* Update lastuse only if needed, to avoid dirtying a cache line.
56 * We use a temp variable to avoid fetching jiffies twice.
58 static inline void tcf_lastuse_update(struct tcf_t *tm)
60 unsigned long now = jiffies;
62 if (tm->lastuse != now)
64 if (unlikely(!tm->firstuse))
68 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
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);
76 #ifdef CONFIG_NET_CLS_ACT
78 #define ACT_P_CREATED 1
79 #define ACT_P_DELETED 1
81 struct tc_action_ops {
82 struct list_head head;
84 __u32 type; /* TBD to match kind */
87 int (*act)(struct sk_buff *, const struct tc_action *,
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,
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 int (*get_dev)(const struct tc_action *a, struct net *net,
99 struct net_device **mirred_dev);
102 struct tc_action_net {
103 struct tcf_idrinfo *idrinfo;
104 const struct tc_action_ops *ops;
108 int tc_action_net_init(struct tc_action_net *tn,
109 const struct tc_action_ops *ops, struct net *net)
113 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
117 tn->idrinfo->net = net;
118 spin_lock_init(&tn->idrinfo->lock);
119 idr_init(&tn->idrinfo->action_idr);
123 void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
124 struct tcf_idrinfo *idrinfo);
126 static inline void tc_action_net_exit(struct tc_action_net *tn)
129 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
134 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
135 struct netlink_callback *cb, int type,
136 const struct tc_action_ops *ops);
137 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
138 bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
140 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
141 struct tc_action **a, const struct tc_action_ops *ops,
142 int bind, bool cpustats);
143 void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est);
144 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
146 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
148 static inline int tcf_idr_release(struct tc_action *a, bool bind)
150 return __tcf_idr_release(a, bind, false);
153 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
154 int tcf_unregister_action(struct tc_action_ops *a,
155 struct pernet_operations *ops);
156 int tcf_action_destroy(struct list_head *actions, int bind);
157 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
158 int nr_actions, struct tcf_result *res);
159 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
160 struct nlattr *est, char *name, int ovr, int bind,
161 struct list_head *actions);
162 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
163 struct nlattr *nla, struct nlattr *est,
164 char *name, int ovr, int bind);
165 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
166 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
167 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
168 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
170 #endif /* CONFIG_NET_CLS_ACT */
172 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
173 u64 packets, u64 lastuse)
175 #ifdef CONFIG_NET_CLS_ACT
176 if (!a->ops->stats_update)
179 a->ops->stats_update(a, bytes, packets, lastuse);