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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 *);
90 int (*lookup)(struct net *net, struct tc_action **a, u32 index,
91 struct netlink_ext_ack *extack);
92 int (*init)(struct net *net, struct nlattr *nla,
93 struct nlattr *est, struct tc_action **act, int ovr,
94 int bind, struct netlink_ext_ack *extack);
95 int (*walk)(struct net *, struct sk_buff *,
96 struct netlink_callback *, int,
97 const struct tc_action_ops *,
98 struct netlink_ext_ack *);
99 void (*stats_update)(struct tc_action *, u64, u32, u64);
100 size_t (*get_fill_size)(const struct tc_action *act);
101 struct net_device *(*get_dev)(const struct tc_action *a);
102};
103
104struct tc_action_net {
105 struct tcf_idrinfo *idrinfo;
106 const struct tc_action_ops *ops;
107};
108
109static inline
110int tc_action_net_init(struct tc_action_net *tn,
111 const struct tc_action_ops *ops)
112{
113 int err = 0;
114
115 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
116 if (!tn->idrinfo)
117 return -ENOMEM;
118 tn->ops = ops;
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 list_head *net_list,
128 unsigned int id)
129{
130 struct net *net;
131
132 rtnl_lock();
133 list_for_each_entry(net, net_list, exit_list) {
134 struct tc_action_net *tn = net_generic(net, id);
135
136 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
137 kfree(tn->idrinfo);
138 }
139 rtnl_unlock();
140}
141
142int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
143 struct netlink_callback *cb, int type,
144 const struct tc_action_ops *ops,
145 struct netlink_ext_ack *extack);
146int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
147bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
148 int bind);
149int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
150 struct tc_action **a, const struct tc_action_ops *ops,
151 int bind, bool cpustats);
152void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
153
154int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
155
156static inline int tcf_idr_release(struct tc_action *a, bool bind)
157{
158 return __tcf_idr_release(a, bind, false);
159}
160
161int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
162int tcf_unregister_action(struct tc_action_ops *a,
163 struct pernet_operations *ops);
164int tcf_action_destroy(struct list_head *actions, int bind);
165int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
166 int nr_actions, struct tcf_result *res);
167int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
168 struct nlattr *est, char *name, int ovr, int bind,
169 struct list_head *actions, size_t *attr_size,
170 struct netlink_ext_ack *extack);
171struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
172 struct nlattr *nla, struct nlattr *est,
173 char *name, int ovr, int bind,
174 struct netlink_ext_ack *extack);
175int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
176int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
177int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
178int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
179
180#endif /* CONFIG_NET_CLS_ACT */
181
182static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
183 u64 packets, u64 lastuse)
184{
185#ifdef CONFIG_NET_CLS_ACT
186 if (!a->ops->stats_update)
187 return;
188
189 a->ops->stats_update(a, bytes, packets, lastuse);
190#endif
191}
192
193typedef int tc_setup_cb_t(enum tc_setup_type type,
194 void *type_data, void *cb_priv);
195
196#ifdef CONFIG_NET_CLS_ACT
197int tc_setup_cb_egdev_register(const struct net_device *dev,
198 tc_setup_cb_t *cb, void *cb_priv);
199void tc_setup_cb_egdev_unregister(const struct net_device *dev,
200 tc_setup_cb_t *cb, void *cb_priv);
201int tc_setup_cb_egdev_call(const struct net_device *dev,
202 enum tc_setup_type type, void *type_data,
203 bool err_stop);
204#else
205static inline
206int tc_setup_cb_egdev_register(const struct net_device *dev,
207 tc_setup_cb_t *cb, void *cb_priv)
208{
209 return 0;
210}
211
212static inline
213void tc_setup_cb_egdev_unregister(const struct net_device *dev,
214 tc_setup_cb_t *cb, void *cb_priv)
215{
216}
217
218static inline
219int tc_setup_cb_egdev_call(const struct net_device *dev,
220 enum tc_setup_type type, void *type_data,
221 bool err_stop)
222{
223 return 0;
224}
225#endif
226
227#endif
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
13
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;
25 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
26 __u32 order;
27 struct list_head list;
28 struct tcf_hashinfo *hinfo;
29
30 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 net_rate_estimator __rcu *tcfa_rate_est;
40 spinlock_t tcfa_lock;
41 struct rcu_head tcfa_rcu;
42 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
43 struct gnet_stats_queue __percpu *cpu_qstats;
44};
45#define tcf_head common.tcfa_head
46#define tcf_index common.tcfa_index
47#define tcf_refcnt common.tcfa_refcnt
48#define tcf_bindcnt common.tcfa_bindcnt
49#define tcf_capab common.tcfa_capab
50#define tcf_action common.tcfa_action
51#define tcf_tm common.tcfa_tm
52#define tcf_bstats common.tcfa_bstats
53#define tcf_qstats common.tcfa_qstats
54#define tcf_rate_est common.tcfa_rate_est
55#define tcf_lock common.tcfa_lock
56#define tcf_rcu common.tcfa_rcu
57
58static inline unsigned int tcf_hash(u32 index, unsigned int hmask)
59{
60 return index & hmask;
61}
62
63static inline int tcf_hashinfo_init(struct tcf_hashinfo *hf, unsigned int mask)
64{
65 int i;
66
67 spin_lock_init(&hf->lock);
68 hf->index = 0;
69 hf->hmask = mask;
70 hf->htab = kzalloc((mask + 1) * sizeof(struct hlist_head),
71 GFP_KERNEL);
72 if (!hf->htab)
73 return -ENOMEM;
74 for (i = 0; i < mask + 1; i++)
75 INIT_HLIST_HEAD(&hf->htab[i]);
76 return 0;
77}
78
79/* Update lastuse only if needed, to avoid dirtying a cache line.
80 * We use a temp variable to avoid fetching jiffies twice.
81 */
82static inline void tcf_lastuse_update(struct tcf_t *tm)
83{
84 unsigned long now = jiffies;
85
86 if (tm->lastuse != now)
87 tm->lastuse = now;
88 if (unlikely(!tm->firstuse))
89 tm->firstuse = now;
90}
91
92static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
93{
94 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
95 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
96 dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse);
97 dtm->expires = jiffies_to_clock_t(stm->expires);
98}
99
100#ifdef CONFIG_NET_CLS_ACT
101
102#define ACT_P_CREATED 1
103#define ACT_P_DELETED 1
104
105struct tc_action_ops {
106 struct list_head head;
107 char kind[IFNAMSIZ];
108 __u32 type; /* TBD to match kind */
109 size_t size;
110 struct module *owner;
111 int (*act)(struct sk_buff *, const struct tc_action *,
112 struct tcf_result *);
113 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
114 void (*cleanup)(struct tc_action *, int bind);
115 int (*lookup)(struct net *, struct tc_action **, u32);
116 int (*init)(struct net *net, struct nlattr *nla,
117 struct nlattr *est, struct tc_action **act, int ovr,
118 int bind);
119 int (*walk)(struct net *, struct sk_buff *,
120 struct netlink_callback *, int, const struct tc_action_ops *);
121 void (*stats_update)(struct tc_action *, u64, u32, u64);
122 int (*get_dev)(const struct tc_action *a, struct net *net,
123 struct net_device **mirred_dev);
124};
125
126struct tc_action_net {
127 struct tcf_hashinfo *hinfo;
128 const struct tc_action_ops *ops;
129};
130
131static inline
132int tc_action_net_init(struct tc_action_net *tn,
133 const struct tc_action_ops *ops, unsigned int mask)
134{
135 int err = 0;
136
137 tn->hinfo = kmalloc(sizeof(*tn->hinfo), GFP_KERNEL);
138 if (!tn->hinfo)
139 return -ENOMEM;
140 tn->ops = ops;
141 err = tcf_hashinfo_init(tn->hinfo, mask);
142 if (err)
143 kfree(tn->hinfo);
144 return err;
145}
146
147void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
148 struct tcf_hashinfo *hinfo);
149
150static inline void tc_action_net_exit(struct tc_action_net *tn)
151{
152 tcf_hashinfo_destroy(tn->ops, tn->hinfo);
153 kfree(tn->hinfo);
154}
155
156int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
157 struct netlink_callback *cb, int type,
158 const struct tc_action_ops *ops);
159int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
160u32 tcf_hash_new_index(struct tc_action_net *tn);
161bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
162 int bind);
163int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
164 struct tc_action **a, const struct tc_action_ops *ops, int bind,
165 bool cpustats);
166void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est);
167void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a);
168
169int __tcf_hash_release(struct tc_action *a, bool bind, bool strict);
170
171static inline int tcf_hash_release(struct tc_action *a, bool bind)
172{
173 return __tcf_hash_release(a, bind, false);
174}
175
176int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
177int tcf_unregister_action(struct tc_action_ops *a,
178 struct pernet_operations *ops);
179int tcf_action_destroy(struct list_head *actions, int bind);
180int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
181 int nr_actions, struct tcf_result *res);
182int tcf_action_init(struct net *net, struct nlattr *nla,
183 struct nlattr *est, char *n, int ovr,
184 int bind, struct list_head *);
185struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
186 struct nlattr *est, char *n, int ovr,
187 int bind);
188int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int);
189int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
190int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
191int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
192
193#endif /* CONFIG_NET_CLS_ACT */
194
195static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
196 u64 packets, u64 lastuse)
197{
198#ifdef CONFIG_NET_CLS_ACT
199 if (!a->ops->stats_update)
200 return;
201
202 a->ops->stats_update(a, bytes, packets, lastuse);
203#endif
204}
205
206#endif