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 net_rate_estimator __rcu *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 struct tc_cookie *act_cookie;
45};
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 int (*get_dev)(const struct tc_action *a, struct net *net,
124 struct net_device **mirred_dev);
125};
126
127struct tc_action_net {
128 struct tcf_hashinfo *hinfo;
129 const struct tc_action_ops *ops;
130};
131
132static inline
133int tc_action_net_init(struct tc_action_net *tn,
134 const struct tc_action_ops *ops, unsigned int mask)
135{
136 int err = 0;
137
138 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
139 if (!tn->hinfo)
140 return -ENOMEM;
141 tn->ops = ops;
142 err = tcf_hashinfo_init(tn->hinfo, mask);
143 if (err)
144 kfree(tn->hinfo);
145 return err;
146}
147
148void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
149 struct tcf_hashinfo *hinfo);
150
151static inline void tc_action_net_exit(struct tc_action_net *tn)
152{
153 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
154 kfree(tn->hinfo);
155}
156
157int 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);
160int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
161u32 tcf_hash_new_index(struct tc_action_net *tn);
162bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
163 int bind);
164int 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,
166 bool cpustats);
167void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
168void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
169
170int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
171
172static inline int tcf_hash_release(struct tc_action *a, bool bind)
173{
174 return __tcf_hash_release(a, bind, false);
175}
176
177int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
178int tcf_unregister_action(struct tc_action_ops *a,
179 struct pernet_operations *ops);
180int tcf_action_destroy(struct list_head *actions, int bind);
181int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
182 int nr_actions, struct tcf_result *res);
183int tcf_action_init(struct net *net, struct nlattr *nla,
184 struct nlattr *est, char *n, int ovr,
185 int bind, struct list_head *);
186struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
187 struct nlattr *est, char *n, int ovr,
188 int bind);
189int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
190int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
191int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
192int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
193
194#endif
195
196static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
197 u64 packets, u64 lastuse)
198{
199#ifdef CONFIG_NET_CLS_ACT
200 if (!a->ops->stats_update)
201 return;
202
203 a->ops->stats_update(a, bytes, packets, lastuse);
204#endif
205}
206
207#endif
208
