1#ifndef __NET_ACT_API_H
2#define __NET_ACT_API_H
3
4
5
6
7
8#include <net/sch_generic.h>
9#include <net/pkt_sched.h>
10#include <net/net_namespace.h>
11#include <net/netns/generic.h>
12
13
14struct tcf_hashinfo {
15 struct hlist_head *htab;
16 unsigned int hmask;
17 spinlock_t lock;
18 u32 index;
19};
20
21struct tc_action_ops;
22
23struct tc_action {
24 const struct tc_action_ops *ops;
25 __u32 type;
26 __u32 order;
27 struct list_head list;
28 struct tcf_hashinfo *hinfo;
29
30 struct hlist_node tcfa_head;
31 u32 tcfa_index;
32 int tcfa_refcnt;
33 int tcfa_bindcnt;
34 u32 tcfa_capab;
35 int tcfa_action;
36 struct tcf_t tcfa_tm;
37 struct gnet_stats_basic_packed tcfa_bstats;
38 struct gnet_stats_queue tcfa_qstats;
39 struct gnet_stats_rate_est64 tcfa_rate_est;
40 spinlock_t tcfa_lock;
41 struct rcu_head tcfa_rcu;
42 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
43 struct gnet_stats_queue __percpu *cpu_qstats;
44};
45#define tcf_act common.tcfa_act
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
58
59static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
60{
61 return index & hmask;
62}
63
64static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
65{
66 int i;
67
68 spin_lock_init(&hf->lock);
69 hf->index = 0;
70 hf->hmask = mask;
71 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
72 GFP_KERNEL);
73 if (!hf->htab)
74 return -ENOMEM;
75 for (i = 0; i < mask + 1; i++)
76 INIT_HLIST_HEAD(&hf->htab[i]);
77 return 0;
78}
79
80
81
82
83static inline void tcf_lastuse_update(struct tcf_t *tm)
84{
85 unsigned long now = jiffies;
86
87 if (tm->lastuse != now)
88 tm->lastuse = now;
89 if (unlikely(!tm->firstuse))
90 tm->firstuse = now;
91}
92
93static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
94{
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);
99}
100
101#ifdef CONFIG_NET_CLS_ACT
102
103#define ACT_P_CREATED 1
104#define ACT_P_DELETED 1
105
106struct tc_action_ops {
107 struct list_head head;
108 char kind[IFNAMSIZ];
109 __u32 type;
110 size_t size;
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,
119 int bind);
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};
124
125struct tc_action_net {
126 struct tcf_hashinfo *hinfo;
127 const struct tc_action_ops *ops;
128};
129
130static inline
131int tc_action_net_init(struct tc_action_net *tn,
132 const struct tc_action_ops *ops, unsigned int mask)
133{
134 int err = 0;
135
136 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
137 if (!tn->hinfo)
138 return -ENOMEM;
139 tn->ops = ops;
140 err = tcf_hashinfo_init(tn->hinfo, mask);
141 if (err)
142 kfree(tn->hinfo);
143 return err;
144}
145
146void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
147 struct tcf_hashinfo *hinfo);
148
149static inline void tc_action_net_exit(struct tc_action_net *tn)
150{
151 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
152 kfree(tn->hinfo);
153}
154
155int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
156 struct netlink_callback *cb, int type,
157 const struct tc_action_ops *ops);
158int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
159u32 tcf_hash_new_index(struct tc_action_net *tn);
160bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
161 int bind);
162int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
163 struct tc_action **a, const struct tc_action_ops *ops, int bind,
164 bool cpustats);
165void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
166void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
167
168int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
169
170static inline int tcf_hash_release(struct tc_action *a, bool bind)
171{
172 return __tcf_hash_release(a, bind, false);
173}
174
175int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
176int tcf_unregister_action(struct tc_action_ops *a,
177 struct pernet_operations *ops);
178int tcf_action_destroy(struct list_head *actions, int bind);
179int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
180 int nr_actions, struct tcf_result *res);
181int tcf_action_init(struct net *net, struct nlattr *nla,
182 struct nlattr *est, char *n, int ovr,
183 int bind, struct list_head *);
184struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
185 struct nlattr *est, char *n, int ovr,
186 int bind);
187int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
188int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
189int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
190int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
191
192#endif
193
194static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
195 u64 packets, u64 lastuse)
196{
197#ifdef CONFIG_NET_CLS_ACT
198 if (!a->ops->stats_update)
199 return;
200
201 a->ops->stats_update(a, bytes, packets, lastuse);
202#endif
203}
204
205#endif
206
