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>
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 *,
111 struct tcf_result *);
112 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
113 void (*cleanup)(struct tc_action *, int bind);
114 int (*lookup)(struct net *, struct tc_action *, u32);
115 int (*init)(struct net *net, struct nlattr *nla,
116 struct nlattr *est, struct tc_action *act, int ovr,
118 int (*walk)(struct net *, struct sk_buff *,
119 struct netlink_callback *, int, struct tc_action *);
120 void (*stats_update)(struct tc_action *, u64, u32, u64);
123 struct tc_action_net {
124 struct tcf_hashinfo *hinfo;
125 const struct tc_action_ops *ops;
129 int tc_action_net_init(struct tc_action_net *tn,
130 const struct tc_action_ops *ops, unsigned int mask)
134 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
138 err = tcf_hashinfo_init(tn->hinfo, mask);
144 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
145 struct tcf_hashinfo *hinfo);
147 static inline void tc_action_net_exit(struct tc_action_net *tn)
149 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
153 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
154 struct netlink_callback *cb, int type,
155 struct tc_action *a);
156 int tcf_hash_search(struct tc_action_net *tn, struct tc_action *a, u32 index);
157 u32 tcf_hash_new_index(struct tc_action_net *tn);
158 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action *a,
160 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
161 struct tc_action *a, int size, int bind, bool cpustats);
162 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
163 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
165 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
167 static inline int tcf_hash_release(struct tc_action *a, bool bind)
169 return __tcf_hash_release(a, bind, false);
172 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
173 int tcf_unregister_action(struct tc_action_ops *a,
174 struct pernet_operations *ops);
175 int tcf_action_destroy(struct list_head *actions, int bind);
176 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
177 struct tcf_result *res);
178 int tcf_action_init(struct net *net, struct nlattr *nla,
179 struct nlattr *est, char *n, int ovr,
180 int bind, struct list_head *);
181 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
182 struct nlattr *est, char *n, int ovr,
184 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
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);
189 #define tc_no_actions(_exts) \
190 (list_empty(&(_exts)->actions))
192 #define tc_for_each_action(_a, _exts) \
193 list_for_each_entry(a, &(_exts)->actions, list)
195 #define tc_single_action(_exts) \
196 (list_is_singular(&(_exts)->actions))
198 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
199 u64 packets, u64 lastuse)
201 if (!a->ops->stats_update)
204 a->ops->stats_update(a, bytes, packets, lastuse);
207 #else /* CONFIG_NET_CLS_ACT */
209 #define tc_no_actions(_exts) true
210 #define tc_for_each_action(_a, _exts) while ((void)(_a), 0)
211 #define tc_single_action(_exts) false
212 #define tcf_action_stats_update(a, bytes, packets, lastuse)
214 #endif /* CONFIG_NET_CLS_ACT */