tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __NET_ACT_API_H
2#define __NET_ACT_API_H
3
4/*
5 * Public action API for classifiers/qdiscs
6*/
7
8#include <net/sch_generic.h>
9#include <net/pkt_sched.h>
10#include <net/net_namespace.h>
11#include <net/netns/generic.h>
12
13struct tcf_idrinfo {
14 spinlock_t lock;
15 struct idr action_idr;
16};
17
18struct tc_action_ops;
19
20struct tc_action {
21 const struct tc_action_ops *ops;
22 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
23 __u32 order;
24 struct list_head list;
25 struct tcf_idrinfo *idrinfo;
26
27 u32 tcfa_index;
28 int tcfa_refcnt;
29 int tcfa_bindcnt;
30 u32 tcfa_capab;
31 int tcfa_action;
32 struct tcf_t tcfa_tm;
33 struct gnet_stats_basic_packed tcfa_bstats;
34 struct gnet_stats_queue tcfa_qstats;
35 struct net_rate_estimator __rcu *tcfa_rate_est;
36 spinlock_t tcfa_lock;
37 struct rcu_head tcfa_rcu;
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#define tcf_rcu common.tcfa_rcu
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 = 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
81struct tc_action_ops {
82 struct list_head head;
83 char kind[IFNAMSIZ];
84 __u32 type; /* TBD to match kind */
85 size_t size;
86 struct module *owner;
87 int (*act)(struct sk_buff *, const struct tc_action *,
88 struct tcf_result *);
89 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
90 void (*cleanup)(struct tc_action *, int bind);
91 int (*lookup)(struct net *, struct tc_action **, u32);
92 int (*init)(struct net *net, struct nlattr *nla,
93 struct nlattr *est, struct tc_action **act, int ovr,
94 int bind);
95 int (*walk)(struct net *, struct sk_buff *,
96 struct netlink_callback *, int, const struct tc_action_ops *);
97 void (*stats_update)(struct tc_action *, u64, u32, u64);
98 int (*get_dev)(const struct tc_action *a, struct net *net,
99 struct net_device **mirred_dev);
100};
101
102struct tc_action_net {
103 struct tcf_idrinfo *idrinfo;
104 const struct tc_action_ops *ops;
105};
106
107static inline
108int tc_action_net_init(struct tc_action_net *tn,
109 const struct tc_action_ops *ops)
110{
111 int err = 0;
112
113 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
114 if (!tn->idrinfo)
115 return -ENOMEM;
116 tn->ops = ops;
117 spin_lock_init(&tn->idrinfo->lock);
118 idr_init(&tn->idrinfo->action_idr);
119 return err;
120}
121
122void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
123 struct tcf_idrinfo *idrinfo);
124
125static inline void tc_action_net_exit(struct tc_action_net *tn)
126{
127 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
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
180#endif