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 struct tcf_idrinfo *idrinfo;
27
28 u32 tcfa_index;
29 refcount_t tcfa_refcnt;
30 atomic_t tcfa_bindcnt;
31 int tcfa_action;
32 struct tcf_t tcfa_tm;
33 struct gnet_stats_basic_packed tcfa_bstats;
34 struct gnet_stats_basic_packed tcfa_bstats_hw;
35 struct gnet_stats_queue tcfa_qstats;
36 struct net_rate_estimator __rcu *tcfa_rate_est;
37 spinlock_t tcfa_lock;
38 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
39 struct gnet_stats_basic_cpu __percpu *cpu_bstats_hw;
40 struct gnet_stats_queue __percpu *cpu_qstats;
41 struct tc_cookie __rcu *act_cookie;
42 struct tcf_chain __rcu *goto_chain;
43 u32 tcfa_flags;
44 u8 hw_stats;
45 u8 used_hw_stats;
46 bool used_hw_stats_valid;
47};
48#define tcf_index common.tcfa_index
49#define tcf_refcnt common.tcfa_refcnt
50#define tcf_bindcnt common.tcfa_bindcnt
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
58#define TCA_ACT_HW_STATS_ANY (TCA_ACT_HW_STATS_IMMEDIATE | \
59 TCA_ACT_HW_STATS_DELAYED)
60
61
62
63
64static inline void tcf_lastuse_update(struct tcf_t *tm)
65{
66 unsigned long now = jiffies;
67
68 if (tm->lastuse != now)
69 tm->lastuse = now;
70 if (unlikely(!tm->firstuse))
71 tm->firstuse = now;
72}
73
74static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
75{
76 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
77 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
78 dtm->firstuse = stm->firstuse ?
79 jiffies_to_clock_t(jiffies - stm->firstuse) : 0;
80 dtm->expires = jiffies_to_clock_t(stm->expires);
81}
82
83#ifdef CONFIG_NET_CLS_ACT
84
85#define ACT_P_CREATED 1
86#define ACT_P_DELETED 1
87
88typedef void (*tc_action_priv_destructor)(void *priv);
89
90struct tc_action_ops {
91 struct list_head head;
92 char kind[IFNAMSIZ];
93 enum tca_id id;
94 size_t size;
95 struct module *owner;
96 int (*act)(struct sk_buff *, const struct tc_action *,
97 struct tcf_result *);
98 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
99 void (*cleanup)(struct tc_action *);
100 int (*lookup)(struct net *net, struct tc_action **a, u32 index);
101 int (*init)(struct net *net, struct nlattr *nla,
102 struct nlattr *est, struct tc_action **act, int ovr,
103 int bind, bool rtnl_held, struct tcf_proto *tp,
104 u32 flags, struct netlink_ext_ack *extack);
105 int (*walk)(struct net *, struct sk_buff *,
106 struct netlink_callback *, int,
107 const struct tc_action_ops *,
108 struct netlink_ext_ack *);
109 void (*stats_update)(struct tc_action *, u64, u32, u64, bool);
110 size_t (*get_fill_size)(const struct tc_action *act);
111 struct net_device *(*get_dev)(const struct tc_action *a,
112 tc_action_priv_destructor *destructor);
113 struct psample_group *
114 (*get_psample_group)(const struct tc_action *a,
115 tc_action_priv_destructor *destructor);
116};
117
118struct tc_action_net {
119 struct tcf_idrinfo *idrinfo;
120 const struct tc_action_ops *ops;
121};
122
123static inline
124int tc_action_net_init(struct net *net, struct tc_action_net *tn,
125 const struct tc_action_ops *ops)
126{
127 int err = 0;
128
129 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
130 if (!tn->idrinfo)
131 return -ENOMEM;
132 tn->ops = ops;
133 tn->idrinfo->net = net;
134 mutex_init(&tn->idrinfo->lock);
135 idr_init(&tn->idrinfo->action_idr);
136 return err;
137}
138
139void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
140 struct tcf_idrinfo *idrinfo);
141
142static inline void tc_action_net_exit(struct list_head *net_list,
143 unsigned int id)
144{
145 struct net *net;
146
147 rtnl_lock();
148 list_for_each_entry(net, net_list, exit_list) {
149 struct tc_action_net *tn = net_generic(net, id);
150
151 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
152 kfree(tn->idrinfo);
153 }
154 rtnl_unlock();
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,
160 struct netlink_ext_ack *extack);
161int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
162int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
163 struct tc_action **a, const struct tc_action_ops *ops,
164 int bind, bool cpustats, u32 flags);
165int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index,
166 struct nlattr *est, struct tc_action **a,
167 const struct tc_action_ops *ops, int bind,
168 u32 flags);
169void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
170
171void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
172int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
173 struct tc_action **a, int bind);
174int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
175
176static inline int tcf_idr_release(struct tc_action *a, bool bind)
177{
178 return __tcf_idr_release(a, bind, false);
179}
180
181int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
182int tcf_unregister_action(struct tc_action_ops *a,
183 struct pernet_operations *ops);
184int tcf_action_destroy(struct tc_action *actions[], int bind);
185int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
186 int nr_actions, struct tcf_result *res);
187int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
188 struct nlattr *est, char *name, int ovr, int bind,
189 struct tc_action *actions[], size_t *attr_size,
190 bool rtnl_held, struct netlink_ext_ack *extack);
191struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
192 struct nlattr *nla, struct nlattr *est,
193 char *name, int ovr, int bind,
194 bool rtnl_held,
195 struct netlink_ext_ack *extack);
196int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
197 int ref);
198int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
199int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
200
201static inline void tcf_action_update_bstats(struct tc_action *a,
202 struct sk_buff *skb)
203{
204 if (likely(a->cpu_bstats)) {
205 bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), skb);
206 return;
207 }
208 spin_lock(&a->tcfa_lock);
209 bstats_update(&a->tcfa_bstats, skb);
210 spin_unlock(&a->tcfa_lock);
211}
212
213static inline void tcf_action_inc_drop_qstats(struct tc_action *a)
214{
215 if (likely(a->cpu_qstats)) {
216 qstats_drop_inc(this_cpu_ptr(a->cpu_qstats));
217 return;
218 }
219 spin_lock(&a->tcfa_lock);
220 qstats_drop_inc(&a->tcfa_qstats);
221 spin_unlock(&a->tcfa_lock);
222}
223
224static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a)
225{
226 if (likely(a->cpu_qstats)) {
227 qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats));
228 return;
229 }
230 spin_lock(&a->tcfa_lock);
231 qstats_overlimit_inc(&a->tcfa_qstats);
232 spin_unlock(&a->tcfa_lock);
233}
234
235void tcf_action_update_stats(struct tc_action *a, u64 bytes, u32 packets,
236 bool drop, bool hw);
237int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
238
239int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
240 struct tcf_chain **handle,
241 struct netlink_ext_ack *newchain);
242struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
243 struct tcf_chain *newchain);
244#endif
245
246static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
247 u64 packets, u64 lastuse, bool hw)
248{
249#ifdef CONFIG_NET_CLS_ACT
250 if (!a->ops->stats_update)
251 return;
252
253 a->ops->stats_update(a, bytes, packets, lastuse, hw);
254#endif
255}
256
257
258#endif
259