Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_ACT_API_H
3#define __NET_ACT_API_H
4
5/*
6 * Public action API for classifiers/qdiscs
7*/
8
9#include <net/sch_generic.h>
10#include <net/pkt_sched.h>
11#include <net/net_namespace.h>
12#include <net/netns/generic.h>
13
14struct tcf_idrinfo {
15 spinlock_t lock;
16 struct idr action_idr;
17};
18
19struct tc_action_ops;
20
21struct tc_action {
22 const struct tc_action_ops *ops;
23 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
24 __u32 order;
25 struct list_head list;
26 struct tcf_idrinfo *idrinfo;
27
28 u32 tcfa_index;
29 int tcfa_refcnt;
30 int tcfa_bindcnt;
31 u32 tcfa_capab;
32 int tcfa_action;
33 struct tcf_t tcfa_tm;
34 struct gnet_stats_basic_packed tcfa_bstats;
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_queue __percpu *cpu_qstats;
40 struct tc_cookie *act_cookie;
41 struct tcf_chain *goto_chain;
42};
43#define tcf_index common.tcfa_index
44#define tcf_refcnt common.tcfa_refcnt
45#define tcf_bindcnt common.tcfa_bindcnt
46#define tcf_capab common.tcfa_capab
47#define tcf_action common.tcfa_action
48#define tcf_tm common.tcfa_tm
49#define tcf_bstats common.tcfa_bstats
50#define tcf_qstats common.tcfa_qstats
51#define tcf_rate_est common.tcfa_rate_est
52#define tcf_lock common.tcfa_lock
53
54/* Update lastuse only if needed, to avoid dirtying a cache line.
55 * We use a temp variable to avoid fetching jiffies twice.
56 */
57static inline void tcf_lastuse_update(struct tcf_t *tm)
58{
59 unsigned long now = jiffies;
60
61 if (tm->lastuse != now)
62 tm->lastuse = now;
63 if (unlikely(!tm->firstuse))
64 tm->firstuse = now;
65}
66
67static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
68{
69 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
70 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
71 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
72 dtm->expires = jiffies_to_clock_t(stm->expires);
73}
74
75#ifdef CONFIG_NET_CLS_ACT
76
77#define ACT_P_CREATED 1
78#define ACT_P_DELETED 1
79
80struct tc_action_ops {
81 struct list_head head;
82 char kind[IFNAMSIZ];
83 __u32 type; /* TBD to match kind */
84 size_t size;
85 struct module *owner;
86 int (*act)(struct sk_buff *, const struct tc_action *,
87 struct tcf_result *);
88 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
89 void (*cleanup)(struct tc_action *, int bind);
90 int (*lookup)(struct net *, struct tc_action **, u32);
91 int (*init)(struct net *net, struct nlattr *nla,
92 struct nlattr *est, struct tc_action **act, int ovr,
93 int bind);
94 int (*walk)(struct net *, struct sk_buff *,
95 struct netlink_callback *, int, const struct tc_action_ops *);
96 void (*stats_update)(struct tc_action *, u64, u32, u64);
97 struct net_device *(*get_dev)(const struct tc_action *a);
98};
99
100struct tc_action_net {
101 struct tcf_idrinfo *idrinfo;
102 const struct tc_action_ops *ops;
103};
104
105static inline
106int tc_action_net_init(struct tc_action_net *tn,
107 const struct tc_action_ops *ops)
108{
109 int err = 0;
110
111 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
112 if (!tn->idrinfo)
113 return -ENOMEM;
114 tn->ops = ops;
115 spin_lock_init(&tn->idrinfo->lock);
116 idr_init(&tn->idrinfo->action_idr);
117 return err;
118}
119
120void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
121 struct tcf_idrinfo *idrinfo);
122
123static inline void tc_action_net_exit(struct tc_action_net *tn)
124{
125 rtnl_lock();
126 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
127 rtnl_unlock();
128 kfree(tn->idrinfo);
129}
130
131int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
132 struct netlink_callback *cb, int type,
133 const struct tc_action_ops *ops);
134int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
135bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
136 int bind);
137int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
138 struct tc_action **a, const struct tc_action_ops *ops,
139 int bind, bool cpustats);
140void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est);
141void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
142
143int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
144
145static inline int tcf_idr_release(struct tc_action *a, bool bind)
146{
147 return __tcf_idr_release(a, bind, false);
148}
149
150int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
151int tcf_unregister_action(struct tc_action_ops *a,
152 struct pernet_operations *ops);
153int tcf_action_destroy(struct list_head *actions, int bind);
154int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
155 int nr_actions, struct tcf_result *res);
156int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
157 struct nlattr *est, char *name, int ovr, int bind,
158 struct list_head *actions);
159struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
160 struct nlattr *nla, struct nlattr *est,
161 char *name, int ovr, int bind);
162int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
163int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
164int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
165int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
166
167#endif /* CONFIG_NET_CLS_ACT */
168
169static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
170 u64 packets, u64 lastuse)
171{
172#ifdef CONFIG_NET_CLS_ACT
173 if (!a->ops->stats_update)
174 return;
175
176 a->ops->stats_update(a, bytes, packets, lastuse);
177#endif
178}
179
180typedef int tc_setup_cb_t(enum tc_setup_type type,
181 void *type_data, void *cb_priv);
182
183#ifdef CONFIG_NET_CLS_ACT
184int tc_setup_cb_egdev_register(const struct net_device *dev,
185 tc_setup_cb_t *cb, void *cb_priv);
186void tc_setup_cb_egdev_unregister(const struct net_device *dev,
187 tc_setup_cb_t *cb, void *cb_priv);
188int tc_setup_cb_egdev_call(const struct net_device *dev,
189 enum tc_setup_type type, void *type_data,
190 bool err_stop);
191#else
192static inline
193int tc_setup_cb_egdev_register(const struct net_device *dev,
194 tc_setup_cb_t *cb, void *cb_priv)
195{
196 return 0;
197}
198
199static inline
200void tc_setup_cb_egdev_unregister(const struct net_device *dev,
201 tc_setup_cb_t *cb, void *cb_priv)
202{
203}
204
205static inline
206int tc_setup_cb_egdev_call(const struct net_device *dev,
207 enum tc_setup_type type, void *type_data,
208 bool err_stop)
209{
210 return 0;
211}
212#endif
213
214#endif