1
2#ifndef __NET_ACT_API_H
3#define __NET_ACT_API_H
4
5
6
7
8
9#include <linux/refcount.h>
10#include <net/sch_generic.h>
11#include <net/pkt_sched.h>
12#include <net/net_namespace.h>
13#include <net/netns/generic.h>
14
15struct tcf_idrinfo {
16 struct mutex lock;
17 struct idr action_idr;
18 struct net *net;
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 tcf_idrinfo *idrinfo;
28
29 u32 tcfa_index;
30 refcount_t tcfa_refcnt;
31 atomic_t tcfa_bindcnt;
32 int tcfa_action;
33 struct tcf_t tcfa_tm;
34 struct gnet_stats_basic_packed tcfa_bstats;
35 struct gnet_stats_basic_packed tcfa_bstats_hw;
36 struct gnet_stats_queue tcfa_qstats;
37 struct net_rate_estimator __rcu *tcfa_rate_est;
38 spinlock_t tcfa_lock;
39 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
40 struct gnet_stats_basic_cpu __percpu *cpu_bstats_hw;
41 struct gnet_stats_queue __percpu *cpu_qstats;
42 struct tc_cookie __rcu *act_cookie;
43 struct tcf_chain __rcu *goto_chain;
44};
45#define tcf_index common.tcfa_index
46#define tcf_refcnt common.tcfa_refcnt
47#define tcf_bindcnt common.tcfa_bindcnt
48#define tcf_action common.tcfa_action
49#define tcf_tm common.tcfa_tm
50#define tcf_bstats common.tcfa_bstats
51#define tcf_qstats common.tcfa_qstats
52#define tcf_rate_est common.tcfa_rate_est
53#define tcf_lock common.tcfa_lock
54
55
56
57
58static inline void tcf_lastuse_update(struct tcf_t *tm)
59{
60 unsigned long now = jiffies;
61
62 if (tm->lastuse != now)
63 tm->lastuse = now;
64 if (unlikely(!tm->firstuse))
65 tm->firstuse = now;
66}
67
68static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
69{
70 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
71 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
72 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
73 dtm->expires = jiffies_to_clock_t(stm->expires);
74}
75
76#ifdef CONFIG_NET_CLS_ACT
77
78#define ACT_P_CREATED 1
79#define ACT_P_DELETED 1
80
81typedef void (*tc_action_priv_destructor)(void *priv);
82
83struct tc_action_ops {
84 struct list_head head;
85 char kind[IFNAMSIZ];
86 enum tca_id id;
87 size_t size;
88 struct module *owner;
89 int (*act)(struct sk_buff *, const struct tc_action *,
90 struct tcf_result *);
91 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
92 void (*cleanup)(struct tc_action *);
93 int (*lookup)(struct net *net, struct tc_action **a, u32 index);
94 int (*init)(struct net *net, struct nlattr *nla,
95 struct nlattr *est, struct tc_action **act, int ovr,
96 int bind, bool rtnl_held, struct tcf_proto *tp,
97 struct netlink_ext_ack *extack);
98 int (*walk)(struct net *, struct sk_buff *,
99 struct netlink_callback *, int,
100 const struct tc_action_ops *,
101 struct netlink_ext_ack *);
102 void (*stats_update)(struct tc_action *, u64, u32, u64, bool);
103 size_t (*get_fill_size)(const struct tc_action *act);
104 struct net_device *(*get_dev)(const struct tc_action *a,
105 tc_action_priv_destructor *destructor);
106 struct psample_group *
107 (*get_psample_group)(const struct tc_action *a,
108 tc_action_priv_destructor *destructor);
109};
110
111struct tc_action_net {
112 struct tcf_idrinfo *idrinfo;
113 const struct tc_action_ops *ops;
114};
115
116static inline
117int tc_action_net_init(struct net *net, struct tc_action_net *tn,
118 const struct tc_action_ops *ops)
119{
120 int err = 0;
121
122 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
123 if (!tn->idrinfo)
124 return -ENOMEM;
125 tn->ops = ops;
126 tn->idrinfo->net = net;
127 mutex_init(&tn->idrinfo->lock);
128 idr_init(&tn->idrinfo->action_idr);
129 return err;
130}
131
132void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
133 struct tcf_idrinfo *idrinfo);
134
135static inline void tc_action_net_exit(struct list_head *net_list,
136 unsigned int id)
137{
138 struct net *net;
139
140 rtnl_lock();
141 list_for_each_entry(net, net_list, exit_list) {
142 struct tc_action_net *tn = net_generic(net, id);
143
144 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
145 kfree(tn->idrinfo);
146 }
147 rtnl_unlock();
148}
149
150int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
151 struct netlink_callback *cb, int type,
152 const struct tc_action_ops *ops,
153 struct netlink_ext_ack *extack);
154int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
155int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
156 struct tc_action **a, const struct tc_action_ops *ops,
157 int bind, bool cpustats);
158void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
159
160void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
161int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
162 struct tc_action **a, int bind);
163int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
164
165static inline int tcf_idr_release(struct tc_action *a, bool bind)
166{
167 return __tcf_idr_release(a, bind, false);
168}
169
170int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
171int tcf_unregister_action(struct tc_action_ops *a,
172 struct pernet_operations *ops);
173int tcf_action_destroy(struct tc_action *actions[], int bind);
174int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
175 int nr_actions, struct tcf_result *res);
176int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
177 struct nlattr *est, char *name, int ovr, int bind,
178 struct tc_action *actions[], size_t *attr_size,
179 bool rtnl_held, struct netlink_ext_ack *extack);
180struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
181 struct nlattr *nla, struct nlattr *est,
182 char *name, int ovr, int bind,
183 bool rtnl_held,
184 struct netlink_ext_ack *extack);
185int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
186 int ref);
187int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
188int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
189int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
190
191int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
192 struct tcf_chain **handle,
193 struct netlink_ext_ack *newchain);
194struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
195 struct tcf_chain *newchain);
196#endif
197
198static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
199 u64 packets, u64 lastuse, bool hw)
200{
201#ifdef CONFIG_NET_CLS_ACT
202 if (!a->ops->stats_update)
203 return;
204
205 a->ops->stats_update(a, bytes, packets, lastuse, hw);
206#endif
207}
208
209
210#endif
211
