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 tcf_proto
*tp
, struct nlattr
*nla
,
184 struct nlattr
*est
, char *name
, int ovr
, int bind
,
185 struct list_head
*actions
);
186 struct tc_action
*tcf_action_init_1(struct net
*net
, struct tcf_proto
*tp
,
187 struct nlattr
*nla
, struct nlattr
*est
,
188 char *name
, int ovr
, int bind
);
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
);