blob: ff268bb0c60fea43025a6b0b666c983780cbd463 [file] [log] [blame]
rjw1f884582022-01-06 17:20:42 +08001/* 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 struct net *net;
18};
19
20struct tc_action_ops;
21
22struct tc_action {
23 const struct tc_action_ops *ops;
24 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
25 __u32 order;
26 struct list_head list;
27 struct tcf_idrinfo *idrinfo;
28
29 u32 tcfa_index;
30 int tcfa_refcnt;
31 int tcfa_bindcnt;
32 u32 tcfa_capab;
33 int tcfa_action;
34 struct tcf_t tcfa_tm;
35 struct gnet_stats_basic_packed tcfa_bstats;
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_queue __percpu *cpu_qstats;
41 struct tc_cookie *act_cookie;
42 struct tcf_chain *goto_chain;
43};
44#define tcf_index common.tcfa_index
45#define tcf_refcnt common.tcfa_refcnt
46#define tcf_bindcnt common.tcfa_bindcnt
47#define tcf_capab common.tcfa_capab
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/* Update lastuse only if needed, to avoid dirtying a cache line.
56 * We use a temp variable to avoid fetching jiffies twice.
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 = 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
82struct tc_action_ops {
83 struct list_head head;
84 char kind[IFNAMSIZ];
85 __u32 type; /* TBD to match kind */
86 size_t size;
87 struct module *owner;
88 int (*act)(struct sk_buff *, const struct tc_action *,
89 struct tcf_result *);
90 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
91 void (*cleanup)(struct tc_action *, int bind);
92 int (*lookup)(struct net *, struct tc_action **, u32);
93 int (*init)(struct net *net, struct nlattr *nla,
94 struct nlattr *est, struct tc_action **act, int ovr,
95 int bind);
96 int (*walk)(struct net *, struct sk_buff *,
97 struct netlink_callback *, int, const struct tc_action_ops *);
98 void (*stats_update)(struct tc_action *, u64, u32, u64);
99 int (*get_dev)(const struct tc_action *a, struct net *net,
100 struct net_device **mirred_dev);
101};
102
103struct tc_action_net {
104 struct tcf_idrinfo *idrinfo;
105 const struct tc_action_ops *ops;
106};
107
108static inline
109int tc_action_net_init(struct net *net, struct tc_action_net *tn,
110 const struct tc_action_ops *ops)
111{
112 int err = 0;
113
114 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
115 if (!tn->idrinfo)
116 return -ENOMEM;
117 tn->ops = ops;
118 tn->idrinfo->net = net;
119 spin_lock_init(&tn->idrinfo->lock);
120 idr_init(&tn->idrinfo->action_idr);
121 return err;
122}
123
124void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
125 struct tcf_idrinfo *idrinfo);
126
127static inline void tc_action_net_exit(struct tc_action_net *tn)
128{
129 rtnl_lock();
130 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
131 rtnl_unlock();
132 kfree(tn->idrinfo);
133}
134
135int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
136 struct netlink_callback *cb, int type,
137 const struct tc_action_ops *ops);
138int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
139bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
140 int bind);
141int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
142 struct tc_action **a, const struct tc_action_ops *ops,
143 int bind, bool cpustats);
144void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est);
145void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
146
147int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
148
149static inline int tcf_idr_release(struct tc_action *a, bool bind)
150{
151 return __tcf_idr_release(a, bind, false);
152}
153
154int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
155int tcf_unregister_action(struct tc_action_ops *a,
156 struct pernet_operations *ops);
157int tcf_action_destroy(struct list_head *actions, int bind);
158int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
159 int nr_actions, struct tcf_result *res);
160int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
161 struct nlattr *est, char *name, int ovr, int bind,
162 struct list_head *actions);
163struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
164 struct nlattr *nla, struct nlattr *est,
165 char *name, int ovr, int bind);
166int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
167int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
168int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
169int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
170
171#endif /* CONFIG_NET_CLS_ACT */
172
173static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
174 u64 packets, u64 lastuse)
175{
176#ifdef CONFIG_NET_CLS_ACT
177 if (!a->ops->stats_update)
178 return;
179
180 a->ops->stats_update(a, bytes, packets, lastuse);
181#endif
182}
183
184#endif