1 #ifndef __NET_ACT_API_H
2 #define __NET_ACT_API_H
5 * Public action API for classifiers/qdiscs
8 #include <net/sch_generic.h>
9 #include <net/pkt_sched.h>
10 #include <net/net_namespace.h>
11 #include <net/netns/generic.h>
15 struct hlist_head *htab;
24 const struct tc_action_ops *ops;
25 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
27 struct list_head list;
28 struct tcf_hashinfo *hinfo;
30 struct hlist_node tcfa_head;
37 struct gnet_stats_basic_packed tcfa_bstats;
38 struct gnet_stats_queue tcfa_qstats;
39 struct net_rate_estimator __rcu *tcfa_rate_est;
41 struct rcu_head tcfa_rcu;
42 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
43 struct gnet_stats_queue __percpu *cpu_qstats;
44 struct tc_cookie *act_cookie;
46 #define tcf_head common.tcfa_head
47 #define tcf_index common.tcfa_index
48 #define tcf_refcnt common.tcfa_refcnt
49 #define tcf_bindcnt common.tcfa_bindcnt
50 #define tcf_capab common.tcfa_capab
51 #define tcf_action common.tcfa_action
52 #define tcf_tm common.tcfa_tm
53 #define tcf_bstats common.tcfa_bstats
54 #define tcf_qstats common.tcfa_qstats
55 #define tcf_rate_est common.tcfa_rate_est
56 #define tcf_lock common.tcfa_lock
57 #define tcf_rcu common.tcfa_rcu
59 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
64 static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
68 spin_lock_init(&hf->lock);
71 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
75 for (i = 0; i < mask + 1; i++)
76 INIT_HLIST_HEAD(&hf->htab[i]);
80 /* Update lastuse only if needed, to avoid dirtying a cache line.
81 * We use a temp variable to avoid fetching jiffies twice.
83 static inline void tcf_lastuse_update(struct tcf_t *tm)
85 unsigned long now = jiffies;
87 if (tm->lastuse != now)
89 if (unlikely(!tm->firstuse))
93 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
95 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
96 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
97 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
98 dtm->expires = jiffies_to_clock_t(stm->expires);
101 #ifdef CONFIG_NET_CLS_ACT
103 #define ACT_P_CREATED 1
104 #define ACT_P_DELETED 1
106 struct tc_action_ops {
107 struct list_head head;
109 __u32 type; /* TBD to match kind */
111 struct module *owner;
112 int (*act)(struct sk_buff *, const struct tc_action *,
113 struct tcf_result *);
114 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
115 void (*cleanup)(struct tc_action *, int bind);
116 int (*lookup)(struct net *, struct tc_action **, u32);
117 int (*init)(struct net *net, struct nlattr *nla,
118 struct nlattr *est, struct tc_action **act, int ovr,
120 int (*walk)(struct net *, struct sk_buff *,
121 struct netlink_callback *, int, const struct tc_action_ops *);
122 void (*stats_update)(struct tc_action *, u64, u32, u64);
123 int (*get_dev)(const struct tc_action *a, struct net *net,
124 struct net_device **mirred_dev);
127 struct tc_action_net {
128 struct tcf_hashinfo *hinfo;
129 const struct tc_action_ops *ops;
133 int tc_action_net_init(struct tc_action_net *tn,
134 const struct tc_action_ops *ops, unsigned int mask)
138 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
142 err = tcf_hashinfo_init(tn->hinfo, mask);
148 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
149 struct tcf_hashinfo *hinfo);
151 static inline void tc_action_net_exit(struct tc_action_net *tn)
153 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
157 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
158 struct netlink_callback *cb, int type,
159 const struct tc_action_ops *ops);
160 int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
161 u32 tcf_hash_new_index(struct tc_action_net *tn);
162 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
164 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
165 struct tc_action **a, const struct tc_action_ops *ops, int bind,
167 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
168 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
170 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
172 static inline int tcf_hash_release(struct tc_action *a, bool bind)
174 return __tcf_hash_release(a, bind, false);
177 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
178 int tcf_unregister_action(struct tc_action_ops *a,
179 struct pernet_operations *ops);
180 int tcf_action_destroy(struct list_head *actions, int bind);
181 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
182 int nr_actions, struct tcf_result *res);
183 int tcf_action_init(struct net *net, struct nlattr *nla,
184 struct nlattr *est, char *n, int ovr,
185 int bind, struct list_head *);
186 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
187 struct nlattr *est, char *n, int ovr,
189 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
190 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
191 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
192 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
194 #endif /* CONFIG_NET_CLS_ACT */
196 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
197 u64 packets, u64 lastuse)
199 #ifdef CONFIG_NET_CLS_ACT
200 if (!a->ops->stats_update)
203 a->ops->stats_update(a, bytes, packets, lastuse);