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1#ifndef __NET_ACT_API_H
2#define __NET_ACT_API_H
3
4/*
5 * Public police 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_common {
14 struct hlist_node tcfc_head;
15 u32 tcfc_index;
16 int tcfc_refcnt;
17 int tcfc_bindcnt;
18 u32 tcfc_capab;
19 int tcfc_action;
20 struct tcf_t tcfc_tm;
21 struct gnet_stats_basic_packed tcfc_bstats;
22 struct gnet_stats_queue tcfc_qstats;
23 struct gnet_stats_rate_est64 tcfc_rate_est;
24 spinlock_t tcfc_lock;
25 struct rcu_head tcfc_rcu;
26 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
27 struct gnet_stats_queue __percpu *cpu_qstats;
28};
29#define tcf_head common.tcfc_head
30#define tcf_index common.tcfc_index
31#define tcf_refcnt common.tcfc_refcnt
32#define tcf_bindcnt common.tcfc_bindcnt
33#define tcf_capab common.tcfc_capab
34#define tcf_action common.tcfc_action
35#define tcf_tm common.tcfc_tm
36#define tcf_bstats common.tcfc_bstats
37#define tcf_qstats common.tcfc_qstats
38#define tcf_rate_est common.tcfc_rate_est
39#define tcf_lock common.tcfc_lock
40#define tcf_rcu common.tcfc_rcu
41
42struct tcf_hashinfo {
43 struct hlist_head *htab;
44 unsigned int hmask;
45 spinlock_t lock;
46 u32 index;
47};
48
49static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
50{
51 return index & hmask;
52}
53
54static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
55{
56 int i;
57
58 spin_lock_init(&hf->lock);
59 hf->index = 0;
60 hf->hmask = mask;
61 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
62 GFP_KERNEL);
63 if (!hf->htab)
64 return -ENOMEM;
65 for (i = 0; i < mask + 1; i++)
66 INIT_HLIST_HEAD(&hf->htab[i]);
67 return 0;
68}
69
70/* Update lastuse only if needed, to avoid dirtying a cache line.
71 * We use a temp variable to avoid fetching jiffies twice.
72 */
73static inline void tcf_lastuse_update(struct tcf_t *tm)
74{
75 unsigned long now = jiffies;
76
77 if (tm->lastuse != now)
78 tm->lastuse = now;
79}
80
81struct tc_action {
82 void *priv;
83 const struct tc_action_ops *ops;
84 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
85 __u32 order;
86 struct list_head list;
87 struct tcf_hashinfo *hinfo;
88};
89
90#ifdef CONFIG_NET_CLS_ACT
91
92#define ACT_P_CREATED 1
93#define ACT_P_DELETED 1
94
95struct tc_action_ops {
96 struct list_head head;
97 char kind[IFNAMSIZ];
98 __u32 type; /* TBD to match kind */
99 struct module *owner;
100 int (*act)(struct sk_buff *, const struct tc_action *, struct tcf_result *);
101 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
102 void (*cleanup)(struct tc_action *, int bind);
103 int (*lookup)(struct net *, struct tc_action *, u32);
104 int (*init)(struct net *net, struct nlattr *nla,
105 struct nlattr *est, struct tc_action *act, int ovr,
106 int bind);
107 int (*walk)(struct net *, struct sk_buff *,
108 struct netlink_callback *, int, struct tc_action *);
109};
110
111struct tc_action_net {
112 struct tcf_hashinfo *hinfo;
113 const struct tc_action_ops *ops;
114};
115
116static inline
117int tc_action_net_init(struct tc_action_net *tn, const struct tc_action_ops *ops,
118 unsigned int mask)
119{
120 int err = 0;
121
122 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
123 if (!tn->hinfo)
124 return -ENOMEM;
125 tn->ops = ops;
126 err = tcf_hashinfo_init(tn->hinfo, mask);
127 if (err)
128 kfree(tn->hinfo);
129 return err;
130}
131
132void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
133 struct tcf_hashinfo *hinfo);
134
135static inline void tc_action_net_exit(struct tc_action_net *tn)
136{
137 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
138 kfree(tn->hinfo);
139}
140
141int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
142 struct netlink_callback *cb, int type,
143 struct tc_action *a);
144int tcf_hash_search(struct tc_action_net *tn, struct tc_action *a, u32 index);
145u32 tcf_hash_new_index(struct tc_action_net *tn);
146int tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action *a,
147 int bind);
148int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
149 struct tc_action *a, int size, int bind, bool cpustats);
150void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
151void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
152
153int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
154
155static inline int tcf_hash_release(struct tc_action *a, bool bind)
156{
157 return __tcf_hash_release(a, bind, false);
158}
159
160int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
161int tcf_unregister_action(struct tc_action_ops *a, struct pernet_operations *ops);
162int tcf_action_destroy(struct list_head *actions, int bind);
163int tcf_action_exec(struct sk_buff *skb, const struct list_head *actions,
164 struct tcf_result *res);
165int tcf_action_init(struct net *net, struct nlattr *nla,
166 struct nlattr *est, char *n, int ovr,
167 int bind, struct list_head *);
168struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
169 struct nlattr *est, char *n, int ovr,
170 int bind);
171int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
172int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
173int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
174int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
175
176#define tc_no_actions(_exts) \
177 (list_empty(&(_exts)->actions))
178
179#define tc_for_each_action(_a, _exts) \
180 list_for_each_entry(a, &(_exts)->actions, list)
181#else /* CONFIG_NET_CLS_ACT */
182
183#define tc_no_actions(_exts) true
184#define tc_for_each_action(_a, _exts) while (0)
185
186#endif /* CONFIG_NET_CLS_ACT */
187#endif
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 <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; /* for backward compat(TCA_OLD_COMPAT) */
26 __u32 order;
27 struct tcf_idrinfo *idrinfo;
28
29 u32 tcfa_index;
30 refcount_t tcfa_refcnt;
31 atomic_t tcfa_bindcnt;
32 int tcfa_action;
33 struct tcf_t tcfa_tm;
34 struct gnet_stats_basic_packed tcfa_bstats;
35 struct gnet_stats_basic_packed tcfa_bstats_hw;
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_basic_cpu __percpu *cpu_bstats_hw;
41 struct gnet_stats_queue __percpu *cpu_qstats;
42 struct tc_cookie __rcu *act_cookie;
43 struct tcf_chain __rcu *goto_chain;
44};
45#define tcf_index common.tcfa_index
46#define tcf_refcnt common.tcfa_refcnt
47#define tcf_bindcnt common.tcfa_bindcnt
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 = 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
81typedef void (*tc_action_priv_destructor)(void *priv);
82
83struct tc_action_ops {
84 struct list_head head;
85 char kind[IFNAMSIZ];
86 enum tca_id id; /* identifier should match kind */
87 size_t size;
88 struct module *owner;
89 int (*act)(struct sk_buff *, const struct tc_action *,
90 struct tcf_result *); /* called under RCU BH lock*/
91 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
92 void (*cleanup)(struct tc_action *);
93 int (*lookup)(struct net *net, struct tc_action **a, u32 index);
94 int (*init)(struct net *net, struct nlattr *nla,
95 struct nlattr *est, struct tc_action **act, int ovr,
96 int bind, bool rtnl_held, struct tcf_proto *tp,
97 struct netlink_ext_ack *extack);
98 int (*walk)(struct net *, struct sk_buff *,
99 struct netlink_callback *, int,
100 const struct tc_action_ops *,
101 struct netlink_ext_ack *);
102 void (*stats_update)(struct tc_action *, u64, u32, u64, bool);
103 size_t (*get_fill_size)(const struct tc_action *act);
104 struct net_device *(*get_dev)(const struct tc_action *a,
105 tc_action_priv_destructor *destructor);
106 struct psample_group *
107 (*get_psample_group)(const struct tc_action *a,
108 tc_action_priv_destructor *destructor);
109};
110
111struct tc_action_net {
112 struct tcf_idrinfo *idrinfo;
113 const struct tc_action_ops *ops;
114};
115
116static inline
117int tc_action_net_init(struct net *net, struct tc_action_net *tn,
118 const struct tc_action_ops *ops)
119{
120 int err = 0;
121
122 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
123 if (!tn->idrinfo)
124 return -ENOMEM;
125 tn->ops = ops;
126 tn->idrinfo->net = net;
127 mutex_init(&tn->idrinfo->lock);
128 idr_init(&tn->idrinfo->action_idr);
129 return err;
130}
131
132void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
133 struct tcf_idrinfo *idrinfo);
134
135static inline void tc_action_net_exit(struct list_head *net_list,
136 unsigned int id)
137{
138 struct net *net;
139
140 rtnl_lock();
141 list_for_each_entry(net, net_list, exit_list) {
142 struct tc_action_net *tn = net_generic(net, id);
143
144 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
145 kfree(tn->idrinfo);
146 }
147 rtnl_unlock();
148}
149
150int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
151 struct netlink_callback *cb, int type,
152 const struct tc_action_ops *ops,
153 struct netlink_ext_ack *extack);
154int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
155int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
156 struct tc_action **a, const struct tc_action_ops *ops,
157 int bind, bool cpustats);
158void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
159
160void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
161int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
162 struct tc_action **a, int bind);
163int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
164
165static inline int tcf_idr_release(struct tc_action *a, bool bind)
166{
167 return __tcf_idr_release(a, bind, false);
168}
169
170int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
171int tcf_unregister_action(struct tc_action_ops *a,
172 struct pernet_operations *ops);
173int tcf_action_destroy(struct tc_action *actions[], int bind);
174int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
175 int nr_actions, struct tcf_result *res);
176int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
177 struct nlattr *est, char *name, int ovr, int bind,
178 struct tc_action *actions[], size_t *attr_size,
179 bool rtnl_held, struct netlink_ext_ack *extack);
180struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
181 struct nlattr *nla, struct nlattr *est,
182 char *name, int ovr, int bind,
183 bool rtnl_held,
184 struct netlink_ext_ack *extack);
185int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
186 int ref);
187int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
188int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
189int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
190
191int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
192 struct tcf_chain **handle,
193 struct netlink_ext_ack *newchain);
194struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
195 struct tcf_chain *newchain);
196#endif /* CONFIG_NET_CLS_ACT */
197
198static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
199 u64 packets, u64 lastuse, bool hw)
200{
201#ifdef CONFIG_NET_CLS_ACT
202 if (!a->ops->stats_update)
203 return;
204
205 a->ops->stats_update(a, bytes, packets, lastuse, hw);
206#endif
207}
208
209
210#endif