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;
32 struct tc_action tcfc_act;
33 struct hlist_node tcfc_head;
40 struct gnet_stats_basic_packed tcfc_bstats;
41 struct gnet_stats_queue tcfc_qstats;
42 struct gnet_stats_rate_est64 tcfc_rate_est;
44 struct rcu_head tcfc_rcu;
45 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
46 struct gnet_stats_queue __percpu *cpu_qstats;
48 #define tcf_act common.tcfc_act
49 #define tcf_head common.tcfc_head
50 #define tcf_index common.tcfc_index
51 #define tcf_refcnt common.tcfc_refcnt
52 #define tcf_bindcnt common.tcfc_bindcnt
53 #define tcf_capab common.tcfc_capab
54 #define tcf_action common.tcfc_action
55 #define tcf_tm common.tcfc_tm
56 #define tcf_bstats common.tcfc_bstats
57 #define tcf_qstats common.tcfc_qstats
58 #define tcf_rate_est common.tcfc_rate_est
59 #define tcf_lock common.tcfc_lock
60 #define tcf_rcu common.tcfc_rcu
62 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
67 static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
71 spin_lock_init(&hf->lock);
74 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
78 for (i = 0; i < mask + 1; i++)
79 INIT_HLIST_HEAD(&hf->htab[i]);
83 /* Update lastuse only if needed, to avoid dirtying a cache line.
84 * We use a temp variable to avoid fetching jiffies twice.
86 static inline void tcf_lastuse_update(struct tcf_t *tm)
88 unsigned long now = jiffies;
90 if (tm->lastuse != now)
92 if (unlikely(!tm->firstuse))
96 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
98 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
99 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
100 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
101 dtm->expires = jiffies_to_clock_t(stm->expires);
104 #ifdef CONFIG_NET_CLS_ACT
106 #define ACT_P_CREATED 1
107 #define ACT_P_DELETED 1
109 struct tc_action_ops {
110 struct list_head head;
112 __u32 type; /* TBD to match kind */
114 struct module *owner;
115 int (*act)(struct sk_buff *, const struct tc_action *,
116 struct tcf_result *);
117 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
118 void (*cleanup)(struct tc_action *, int bind);
119 int (*lookup)(struct net *, struct tc_action **, u32);
120 int (*init)(struct net *net, struct nlattr *nla,
121 struct nlattr *est, struct tc_action **act, int ovr,
123 int (*walk)(struct net *, struct sk_buff *,
124 struct netlink_callback *, int, const struct tc_action_ops *);
125 void (*stats_update)(struct tc_action *, u64, u32, u64);
128 struct tc_action_net {
129 struct tcf_hashinfo *hinfo;
130 const struct tc_action_ops *ops;
134 int tc_action_net_init(struct tc_action_net *tn,
135 const struct tc_action_ops *ops, unsigned int mask)
139 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
143 err = tcf_hashinfo_init(tn->hinfo, mask);
149 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
150 struct tcf_hashinfo *hinfo);
152 static inline void tc_action_net_exit(struct tc_action_net *tn)
154 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
158 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
159 struct netlink_callback *cb, int type,
160 const struct tc_action_ops *ops);
161 int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
162 u32 tcf_hash_new_index(struct tc_action_net *tn);
163 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
165 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
166 struct tc_action **a, const struct tc_action_ops *ops, int bind,
168 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
169 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
171 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
173 static inline int tcf_hash_release(struct tc_action *a, bool bind)
175 return __tcf_hash_release(a, bind, false);
178 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
179 int tcf_unregister_action(struct tc_action_ops *a,
180 struct pernet_operations *ops);
181 int tcf_action_destroy(struct list_head *actions, int bind);
182 int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
183 struct tcf_result *res);
184 int tcf_action_init(struct net *net, struct nlattr *nla,
185 struct nlattr *est, char *n, int ovr,
186 int bind, struct list_head *);
187 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
188 struct nlattr *est, char *n, int ovr,
190 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
191 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
192 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
193 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
195 #define tc_no_actions(_exts) \
196 (list_empty(&(_exts)->actions))
198 #define tc_for_each_action(_a, _exts) \
199 list_for_each_entry(a, &(_exts)->actions, list)
201 #define tc_single_action(_exts) \
202 (list_is_singular(&(_exts)->actions))
204 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
205 u64 packets, u64 lastuse)
207 if (!a->ops->stats_update)
210 a->ops->stats_update(a, bytes, packets, lastuse);
213 #else /* CONFIG_NET_CLS_ACT */
215 #define tc_no_actions(_exts) true
216 #define tc_for_each_action(_a, _exts) while ((void)(_a), 0)
217 #define tc_single_action(_exts) false
218 #define tcf_action_stats_update(a, bytes, packets, lastuse)
220 #endif /* CONFIG_NET_CLS_ACT */