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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __NET_ACT_API_H
2#define __NET_ACT_API_H
3
4/*
Jamal Hadi Salim0b0f43f2016-06-05 10:41:32 -04005 * Public action API for classifiers/qdiscs
6*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8#include <net/sch_generic.h>
9#include <net/pkt_sched.h>
WANG Congddf97cc2016-02-22 15:57:53 -080010#include <net/net_namespace.h>
11#include <net/netns/generic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
WANG Conga85a9702016-07-25 16:09:41 -070013
14struct tcf_hashinfo {
15 struct hlist_head *htab;
16 unsigned int hmask;
17 spinlock_t lock;
18 u32 index;
19};
20
21struct tc_action_ops;
22
23struct tc_action {
24 const struct tc_action_ops *ops;
WANG Congec0595c2016-07-25 16:09:42 -070025 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
26 __u32 order;
27 struct list_head list;
28 struct tcf_hashinfo *hinfo;
WANG Conga85a9702016-07-25 16:09:41 -070029
WANG Congec0595c2016-07-25 16:09:42 -070030 struct hlist_node tcfa_head;
31 u32 tcfa_index;
32 int tcfa_refcnt;
33 int tcfa_bindcnt;
34 u32 tcfa_capab;
35 int tcfa_action;
36 struct tcf_t tcfa_tm;
37 struct gnet_stats_basic_packed tcfa_bstats;
38 struct gnet_stats_queue tcfa_qstats;
39 struct gnet_stats_rate_est64 tcfa_rate_est;
40 spinlock_t tcfa_lock;
41 struct rcu_head tcfa_rcu;
Eric Dumazet519c8182015-07-06 05:18:04 -070042 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
43 struct gnet_stats_queue __percpu *cpu_qstats;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044};
WANG Congec0595c2016-07-25 16:09:42 -070045#define tcf_act common.tcfa_act
46#define tcf_head common.tcfa_head
47#define tcf_index common.tcfa_index
48#define tcf_refcnt common.tcfa_refcnt
49#define tcf_bindcnt common.tcfa_bindcnt
50#define tcf_capab common.tcfa_capab
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#define tcf_rcu common.tcfa_rcu
David S. Millere9ce1cd2006-08-21 23:54:55 -070058
David S. Millere9ce1cd2006-08-21 23:54:55 -070059static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
60{
61 return index & hmask;
62}
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
WANG Cong369ba562013-12-15 20:15:08 -080064static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
65{
WANG Cong89819dc2013-12-15 20:15:09 -080066 int i;
67
68 spin_lock_init(&hf->lock);
WANG Congddafd342014-01-09 16:13:59 -080069 hf->index = 0;
WANG Cong369ba562013-12-15 20:15:08 -080070 hf->hmask = mask;
WANG Cong89819dc2013-12-15 20:15:09 -080071 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
WANG Cong369ba562013-12-15 20:15:08 -080072 GFP_KERNEL);
73 if (!hf->htab)
74 return -ENOMEM;
WANG Cong89819dc2013-12-15 20:15:09 -080075 for (i = 0; i < mask + 1; i++)
76 INIT_HLIST_HEAD(&hf->htab[i]);
WANG Cong369ba562013-12-15 20:15:08 -080077 return 0;
78}
79
Eric Dumazet56e5d1c2015-07-06 05:18:08 -070080/* Update lastuse only if needed, to avoid dirtying a cache line.
81 * We use a temp variable to avoid fetching jiffies twice.
82 */
83static inline void tcf_lastuse_update(struct tcf_t *tm)
84{
85 unsigned long now = jiffies;
86
87 if (tm->lastuse != now)
88 tm->lastuse = now;
Jamal Hadi Salim53eb4402016-06-06 06:32:54 -040089 if (unlikely(!tm->firstuse))
90 tm->firstuse = now;
Eric Dumazet56e5d1c2015-07-06 05:18:08 -070091}
92
Jamal Hadi Salim48d8ee12016-06-06 06:32:55 -040093static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
94{
95 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
96 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
97 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
98 dtm->expires = jiffies_to_clock_t(stm->expires);
99}
100
Amir Vadai00175ae2016-03-08 12:42:31 +0200101#ifdef CONFIG_NET_CLS_ACT
102
103#define ACT_P_CREATED 1
104#define ACT_P_DELETED 1
105
David S. Millere9ce1cd2006-08-21 23:54:55 -0700106struct tc_action_ops {
WANG Cong1f747c22013-12-15 20:15:10 -0800107 struct list_head head;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 char kind[IFNAMSIZ];
109 __u32 type; /* TBD to match kind */
WANG Conga85a9702016-07-25 16:09:41 -0700110 size_t size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 struct module *owner;
Jamal Hadi Salim0b0f43f2016-06-05 10:41:32 -0400112 int (*act)(struct sk_buff *, const struct tc_action *,
113 struct tcf_result *);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700114 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
WANG Conga5b5c952014-02-11 17:07:32 -0800115 void (*cleanup)(struct tc_action *, int bind);
WANG Conga85a9702016-07-25 16:09:41 -0700116 int (*lookup)(struct net *, struct tc_action **, u32);
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000117 int (*init)(struct net *net, struct nlattr *nla,
WANG Conga85a9702016-07-25 16:09:41 -0700118 struct nlattr *est, struct tc_action **act, int ovr,
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000119 int bind);
WANG Congddf97cc2016-02-22 15:57:53 -0800120 int (*walk)(struct net *, struct sk_buff *,
WANG Conga85a9702016-07-25 16:09:41 -0700121 struct netlink_callback *, int, const struct tc_action_ops *);
Amir Vadai38040702016-05-13 12:55:35 +0000122 void (*stats_update)(struct tc_action *, u64, u32, u64);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123};
124
WANG Congddf97cc2016-02-22 15:57:53 -0800125struct tc_action_net {
126 struct tcf_hashinfo *hinfo;
127 const struct tc_action_ops *ops;
128};
129
130static inline
Jamal Hadi Salim0b0f43f2016-06-05 10:41:32 -0400131int tc_action_net_init(struct tc_action_net *tn,
132 const struct tc_action_ops *ops, unsigned int mask)
WANG Congddf97cc2016-02-22 15:57:53 -0800133{
134 int err = 0;
135
136 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
137 if (!tn->hinfo)
138 return -ENOMEM;
139 tn->ops = ops;
140 err = tcf_hashinfo_init(tn->hinfo, mask);
141 if (err)
142 kfree(tn->hinfo);
143 return err;
144}
145
146void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
147 struct tcf_hashinfo *hinfo);
148
149static inline void tc_action_net_exit(struct tc_action_net *tn)
150{
151 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
WANG Cong18fcf492016-04-04 10:32:48 -0700152 kfree(tn->hinfo);
WANG Congddf97cc2016-02-22 15:57:53 -0800153}
154
155int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
156 struct netlink_callback *cb, int type,
WANG Conga85a9702016-07-25 16:09:41 -0700157 const struct tc_action_ops *ops);
158int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
WANG Congddf97cc2016-02-22 15:57:53 -0800159u32 tcf_hash_new_index(struct tc_action_net *tn);
WANG Conga85a9702016-07-25 16:09:41 -0700160bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
WANG Congb2313072016-06-13 13:46:28 -0700161 int bind);
WANG Congddf97cc2016-02-22 15:57:53 -0800162int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
WANG Conga85a9702016-07-25 16:09:41 -0700163 struct tc_action **a, const struct tc_action_ops *ops, int bind,
164 bool cpustats);
WANG Cong86062032014-02-11 17:07:31 -0800165void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
WANG Congddf97cc2016-02-22 15:57:53 -0800166void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700167
Daniel Borkmann28e6b672015-07-29 23:35:25 +0200168int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
169
170static inline int tcf_hash_release(struct tc_action *a, bool bind)
171{
172 return __tcf_hash_release(a, bind, false);
173}
174
WANG Congddf97cc2016-02-22 15:57:53 -0800175int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
Jamal Hadi Salim0b0f43f2016-06-05 10:41:32 -0400176int tcf_unregister_action(struct tc_action_ops *a,
177 struct pernet_operations *ops);
WANG Cong55334a52014-02-11 17:07:34 -0800178int tcf_action_destroy(struct list_head *actions, int bind);
WANG Cong33be6272013-12-15 20:15:05 -0800179int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
Joe Perches5c152572013-07-30 22:47:13 -0700180 struct tcf_result *res);
WANG Cong33be6272013-12-15 20:15:05 -0800181int tcf_action_init(struct net *net, struct nlattr *nla,
Joe Perches5c152572013-07-30 22:47:13 -0700182 struct nlattr *est, char *n, int ovr,
WANG Cong33be6272013-12-15 20:15:05 -0800183 int bind, struct list_head *);
Joe Perches5c152572013-07-30 22:47:13 -0700184struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
185 struct nlattr *est, char *n, int ovr,
186 int bind);
WANG Cong33be6272013-12-15 20:15:05 -0800187int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
Joe Perches5c152572013-07-30 22:47:13 -0700188int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
189int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
190int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
Amir Vadai00175ae2016-03-08 12:42:31 +0200191
192#define tc_no_actions(_exts) \
193 (list_empty(&(_exts)->actions))
194
195#define tc_for_each_action(_a, _exts) \
196 list_for_each_entry(a, &(_exts)->actions, list)
Amir Vadai38040702016-05-13 12:55:35 +0000197
Ido Schimmel86cb13e2016-07-25 13:12:33 +0300198#define tc_single_action(_exts) \
199 (list_is_singular(&(_exts)->actions))
200
Amir Vadai38040702016-05-13 12:55:35 +0000201static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
202 u64 packets, u64 lastuse)
203{
204 if (!a->ops->stats_update)
205 return;
206
207 a->ops->stats_update(a, bytes, packets, lastuse);
208}
209
Amir Vadai00175ae2016-03-08 12:42:31 +0200210#else /* CONFIG_NET_CLS_ACT */
211
212#define tc_no_actions(_exts) true
Arnd Bergmanne6790fd2016-05-18 16:21:07 +0200213#define tc_for_each_action(_a, _exts) while ((void)(_a), 0)
Ido Schimmel86cb13e2016-07-25 13:12:33 +0300214#define tc_single_action(_exts) false
Amir Vadai38040702016-05-13 12:55:35 +0000215#define tcf_action_stats_update(a, bytes, packets, lastuse)
Amir Vadai00175ae2016-03-08 12:42:31 +0200216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217#endif /* CONFIG_NET_CLS_ACT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218#endif