This source file includes following definitions.
- tcf_lastuse_update
- tcf_tm_dump
- tc_action_net_init
- tc_action_net_exit
- tcf_idr_release
- tcf_action_stats_update
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
15 struct tcf_idrinfo {
16 struct mutex lock;
17 struct idr action_idr;
18 struct net *net;
19 };
20
21 struct tc_action_ops;
22
23 struct 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
58 static 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
68 static 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 = stm->firstuse ?
73 jiffies_to_clock_t(jiffies - stm->firstuse) : 0;
74 dtm->expires = jiffies_to_clock_t(stm->expires);
75 }
76
77 #ifdef CONFIG_NET_CLS_ACT
78
79 #define ACT_P_CREATED 1
80 #define ACT_P_DELETED 1
81
82 typedef void (*tc_action_priv_destructor)(void *priv);
83
84 struct tc_action_ops {
85 struct list_head head;
86 char kind[IFNAMSIZ];
87 enum tca_id id;
88 size_t size;
89 struct module *owner;
90 int (*act)(struct sk_buff *, const struct tc_action *,
91 struct tcf_result *);
92 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
93 void (*cleanup)(struct tc_action *);
94 int (*lookup)(struct net *net, struct tc_action **a, u32 index);
95 int (*init)(struct net *net, struct nlattr *nla,
96 struct nlattr *est, struct tc_action **act, int ovr,
97 int bind, bool rtnl_held, struct tcf_proto *tp,
98 struct netlink_ext_ack *extack);
99 int (*walk)(struct net *, struct sk_buff *,
100 struct netlink_callback *, int,
101 const struct tc_action_ops *,
102 struct netlink_ext_ack *);
103 void (*stats_update)(struct tc_action *, u64, u32, u64, bool);
104 size_t (*get_fill_size)(const struct tc_action *act);
105 struct net_device *(*get_dev)(const struct tc_action *a,
106 tc_action_priv_destructor *destructor);
107 struct psample_group *
108 (*get_psample_group)(const struct tc_action *a,
109 tc_action_priv_destructor *destructor);
110 };
111
112 struct tc_action_net {
113 struct tcf_idrinfo *idrinfo;
114 const struct tc_action_ops *ops;
115 };
116
117 static inline
118 int tc_action_net_init(struct net *net, struct tc_action_net *tn,
119 const struct tc_action_ops *ops)
120 {
121 int err = 0;
122
123 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
124 if (!tn->idrinfo)
125 return -ENOMEM;
126 tn->ops = ops;
127 tn->idrinfo->net = net;
128 mutex_init(&tn->idrinfo->lock);
129 idr_init(&tn->idrinfo->action_idr);
130 return err;
131 }
132
133 void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
134 struct tcf_idrinfo *idrinfo);
135
136 static inline void tc_action_net_exit(struct list_head *net_list,
137 unsigned int id)
138 {
139 struct net *net;
140
141 rtnl_lock();
142 list_for_each_entry(net, net_list, exit_list) {
143 struct tc_action_net *tn = net_generic(net, id);
144
145 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
146 kfree(tn->idrinfo);
147 }
148 rtnl_unlock();
149 }
150
151 int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
152 struct netlink_callback *cb, int type,
153 const struct tc_action_ops *ops,
154 struct netlink_ext_ack *extack);
155 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
156 int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
157 struct tc_action **a, const struct tc_action_ops *ops,
158 int bind, bool cpustats);
159 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
160
161 void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
162 int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
163 struct tc_action **a, int bind);
164 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
165
166 static inline int tcf_idr_release(struct tc_action *a, bool bind)
167 {
168 return __tcf_idr_release(a, bind, false);
169 }
170
171 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
172 int tcf_unregister_action(struct tc_action_ops *a,
173 struct pernet_operations *ops);
174 int tcf_action_destroy(struct tc_action *actions[], int bind);
175 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
176 int nr_actions, struct tcf_result *res);
177 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
178 struct nlattr *est, char *name, int ovr, int bind,
179 struct tc_action *actions[], size_t *attr_size,
180 bool rtnl_held, struct netlink_ext_ack *extack);
181 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
182 struct nlattr *nla, struct nlattr *est,
183 char *name, int ovr, int bind,
184 bool rtnl_held,
185 struct netlink_ext_ack *extack);
186 int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
187 int ref);
188 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
189 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
190 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
191
192 int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
193 struct tcf_chain **handle,
194 struct netlink_ext_ack *newchain);
195 struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
196 struct tcf_chain *newchain);
197 #endif
198
199 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
200 u64 packets, u64 lastuse, bool hw)
201 {
202 #ifdef CONFIG_NET_CLS_ACT
203 if (!a->ops->stats_update)
204 return;
205
206 a->ops->stats_update(a, bytes, packets, lastuse, hw);
207 #endif
208 }
209
210
211 #endif