1 #ifndef __NET_ACT_API_H
2 #define __NET_ACT_API_H
5 * Public police 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>
14 struct hlist_node tcfc_head;
21 struct gnet_stats_basic_packed tcfc_bstats;
22 struct gnet_stats_queue tcfc_qstats;
23 struct gnet_stats_rate_est64 tcfc_rate_est;
25 struct rcu_head tcfc_rcu;
26 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
27 struct gnet_stats_queue __percpu *cpu_qstats;
29 #define tcf_head common.tcfc_head
30 #define tcf_index common.tcfc_index
31 #define tcf_refcnt common.tcfc_refcnt
32 #define tcf_bindcnt common.tcfc_bindcnt
33 #define tcf_capab common.tcfc_capab
34 #define tcf_action common.tcfc_action
35 #define tcf_tm common.tcfc_tm
36 #define tcf_bstats common.tcfc_bstats
37 #define tcf_qstats common.tcfc_qstats
38 #define tcf_rate_est common.tcfc_rate_est
39 #define tcf_lock common.tcfc_lock
40 #define tcf_rcu common.tcfc_rcu
43 struct hlist_head *htab;
49 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
54 static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
58 spin_lock_init(&hf->lock);
61 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
65 for (i = 0; i < mask + 1; i++)
66 INIT_HLIST_HEAD(&hf->htab[i]);
70 /* Update lastuse only if needed, to avoid dirtying a cache line.
71 * We use a temp variable to avoid fetching jiffies twice.
73 static inline void tcf_lastuse_update(struct tcf_t *tm)
75 unsigned long now = jiffies;
77 if (tm->lastuse != now)
79 if (unlikely(!tm->firstuse))
83 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
85 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
86 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
87 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
88 dtm->expires = jiffies_to_clock_t(stm->expires);
93 const struct tc_action_ops *ops;
94 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
96 struct list_head list;
97 struct tcf_hashinfo *hinfo;
100 #ifdef CONFIG_NET_CLS_ACT
102 #define ACT_P_CREATED 1
103 #define ACT_P_DELETED 1
105 struct tc_action_ops {
106 struct list_head head;
108 __u32 type; /* TBD to match kind */
109 struct module *owner;
110 int (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *);
111 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
112 void (*cleanup)(struct tc_action *, int bind);
113 int (*lookup)(struct net *, struct tc_action *, u32);
114 int (*init)(struct net *net, struct nlattr *nla,
115 struct nlattr *est, struct tc_action *act, int ovr,
117 int (*walk)(struct net *, struct sk_buff *,
118 struct netlink_callback *, int, struct tc_action *);
119 void (*stats_update)(struct tc_action *, u64, u32, u64);
122 struct tc_action_net {
123 struct tcf_hashinfo *hinfo;
124 const struct tc_action_ops *ops;
128 int tc_action_net_init(struct tc_action_net *tn, const struct tc_action_ops *ops,
133 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
137 err = tcf_hashinfo_init(tn->hinfo, mask);
143 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
144 struct tcf_hashinfo *hinfo);
146 static inline void tc_action_net_exit(struct tc_action_net *tn)
148 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
152 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
153 struct netlink_callback *cb, int type,
154 struct tc_action *a);
155 int tcf_hash_search(struct tc_action_net *tn, struct tc_action *a, u32 index);
156 u32 tcf_hash_new_index(struct tc_action_net *tn);
157 int tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action *a,
159 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
160 struct tc_action *a, int size, int bind, bool cpustats);
161 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
162 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
164 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
166 static inline int tcf_hash_release(struct tc_action *a, bool bind)
168 return __tcf_hash_release(a, bind, false);
171 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
172 int tcf_unregister_action(struct tc_action_ops *a, struct pernet_operations *ops);
173 int tcf_action_destroy(struct list_head *actions, int bind);
174 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
175 struct tcf_result *res);
176 int tcf_action_init(struct net *net, struct nlattr *nla,
177 struct nlattr *est, char *n, int ovr,
178 int bind, struct list_head *);
179 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
180 struct nlattr *est, char *n, int ovr,
182 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
183 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
184 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
185 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
187 #define tc_no_actions(_exts) \
188 (list_empty(&(_exts)->actions))
190 #define tc_for_each_action(_a, _exts) \
191 list_for_each_entry(a, &(_exts)->actions, list)
193 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
194 u64 packets, u64 lastuse)
196 if (!a->ops->stats_update)
199 a->ops->stats_update(a, bytes, packets, lastuse);
202 #else /* CONFIG_NET_CLS_ACT */
204 #define tc_no_actions(_exts) true
205 #define tc_for_each_action(_a, _exts) while ((void)(_a), 0)
206 #define tcf_action_stats_update(a, bytes, packets, lastuse)
208 #endif /* CONFIG_NET_CLS_ACT */