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;
45 #define tcf_head common.tcfa_head
46 #define tcf_index common.tcfa_index
47 #define tcf_refcnt common.tcfa_refcnt
48 #define tcf_bindcnt common.tcfa_bindcnt
49 #define tcf_capab common.tcfa_capab
50 #define tcf_action common.tcfa_action
51 #define tcf_tm common.tcfa_tm
52 #define tcf_bstats common.tcfa_bstats
53 #define tcf_qstats common.tcfa_qstats
54 #define tcf_rate_est common.tcfa_rate_est
55 #define tcf_lock common.tcfa_lock
56 #define tcf_rcu common.tcfa_rcu
58 static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
63 static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
67 spin_lock_init(&hf->lock);
70 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
74 for (i = 0; i < mask + 1; i++)
75 INIT_HLIST_HEAD(&hf->htab[i]);
79 /* Update lastuse only if needed, to avoid dirtying a cache line.
80 * We use a temp variable to avoid fetching jiffies twice.
82 static inline void tcf_lastuse_update(struct tcf_t *tm)
84 unsigned long now = jiffies;
86 if (tm->lastuse != now)
88 if (unlikely(!tm->firstuse))
92 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
94 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
95 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
96 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
97 dtm->expires = jiffies_to_clock_t(stm->expires);
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 */
110 struct module *owner;
111 int (*act)(struct sk_buff *, const struct tc_action *,
112 struct tcf_result *);
113 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
114 void (*cleanup)(struct tc_action *, int bind);
115 int (*lookup)(struct net *, struct tc_action **, u32);
116 int (*init)(struct net *net, struct nlattr *nla,
117 struct nlattr *est, struct tc_action **act, int ovr,
119 int (*walk)(struct net *, struct sk_buff *,
120 struct netlink_callback *, int, const struct tc_action_ops *);
121 void (*stats_update)(struct tc_action *, u64, u32, u64);
122 int (*get_dev)(const struct tc_action *a, struct net *net,
123 struct net_device **mirred_dev);
126 struct tc_action_net {
127 struct tcf_hashinfo *hinfo;
128 const struct tc_action_ops *ops;
132 int tc_action_net_init(struct tc_action_net *tn,
133 const struct tc_action_ops *ops, unsigned int mask)
137 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
141 err = tcf_hashinfo_init(tn->hinfo, mask);
147 void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
148 struct tcf_hashinfo *hinfo);
150 static inline void tc_action_net_exit(struct tc_action_net *tn)
152 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
156 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
157 struct netlink_callback *cb, int type,
158 const struct tc_action_ops *ops);
159 int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
160 u32 tcf_hash_new_index(struct tc_action_net *tn);
161 bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
163 int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
164 struct tc_action **a, const struct tc_action_ops *ops, int bind,
166 void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
167 void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
169 int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
171 static inline int tcf_hash_release(struct tc_action *a, bool bind)
173 return __tcf_hash_release(a, bind, false);
176 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
177 int tcf_unregister_action(struct tc_action_ops *a,
178 struct pernet_operations *ops);
179 int tcf_action_destroy(struct list_head *actions, int bind);
180 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
181 int nr_actions, struct tcf_result *res);
182 int tcf_action_init(struct net *net, struct nlattr *nla,
183 struct nlattr *est, char *n, int ovr,
184 int bind, struct list_head *);
185 struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
186 struct nlattr *est, char *n, int ovr,
188 int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
189 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
190 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
191 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
193 #endif /* CONFIG_NET_CLS_ACT */
195 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
196 u64 packets, u64 lastuse)
198 #ifdef CONFIG_NET_CLS_ACT
199 if (!a->ops->stats_update)
202 a->ops->stats_update(a, bytes, packets, lastuse);