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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef __NET_ACT_API_H |
3 | #define __NET_ACT_API_H | |
4 | ||
5 | /* | |
0b0f43fe JHS |
6 | * Public action API for classifiers/qdiscs |
7 | */ | |
1da177e4 LT |
8 | |
9 | #include <net/sch_generic.h> | |
10 | #include <net/pkt_sched.h> | |
ddf97ccd WC |
11 | #include <net/net_namespace.h> |
12 | #include <net/netns/generic.h> | |
1da177e4 | 13 | |
65a206c0 CM |
14 | struct tcf_idrinfo { |
15 | spinlock_t lock; | |
16 | struct idr action_idr; | |
8f4d0354 | 17 | struct net *net; |
a85a970a WC |
18 | }; |
19 | ||
20 | struct tc_action_ops; | |
21 | ||
22 | struct tc_action { | |
23 | const struct tc_action_ops *ops; | |
ec0595cc WC |
24 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
25 | __u32 order; | |
26 | struct list_head list; | |
65a206c0 | 27 | struct tcf_idrinfo *idrinfo; |
a85a970a | 28 | |
ec0595cc WC |
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; | |
1c0d32fd | 37 | struct net_rate_estimator __rcu *tcfa_rate_est; |
ec0595cc | 38 | spinlock_t tcfa_lock; |
519c818e ED |
39 | struct gnet_stats_basic_cpu __percpu *cpu_bstats; |
40 | struct gnet_stats_queue __percpu *cpu_qstats; | |
1045ba77 | 41 | struct tc_cookie *act_cookie; |
db50514f | 42 | struct tcf_chain *goto_chain; |
e9ce1cd3 | 43 | }; |
ec0595cc WC |
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 | |
e9ce1cd3 | 54 | |
56e5d1ca ED |
55 | /* Update lastuse only if needed, to avoid dirtying a cache line. |
56 | * We use a temp variable to avoid fetching jiffies twice. | |
57 | */ | |
58 | static 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; | |
53eb440f JHS |
64 | if (unlikely(!tm->firstuse)) |
65 | tm->firstuse = now; | |
56e5d1ca ED |
66 | } |
67 | ||
48d8ee16 JHS |
68 | static 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 | ||
00175aec AV |
76 | #ifdef CONFIG_NET_CLS_ACT |
77 | ||
78 | #define ACT_P_CREATED 1 | |
79 | #define ACT_P_DELETED 1 | |
80 | ||
e9ce1cd3 | 81 | struct tc_action_ops { |
1f747c26 | 82 | struct list_head head; |
1da177e4 LT |
83 | char kind[IFNAMSIZ]; |
84 | __u32 type; /* TBD to match kind */ | |
a85a970a | 85 | size_t size; |
1da177e4 | 86 | struct module *owner; |
0b0f43fe JHS |
87 | int (*act)(struct sk_buff *, const struct tc_action *, |
88 | struct tcf_result *); | |
e9ce1cd3 | 89 | int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
a5b5c958 | 90 | void (*cleanup)(struct tc_action *, int bind); |
a85a970a | 91 | int (*lookup)(struct net *, struct tc_action **, u32); |
c1b52739 | 92 | int (*init)(struct net *net, struct nlattr *nla, |
a85a970a | 93 | struct nlattr *est, struct tc_action **act, int ovr, |
c1b52739 | 94 | int bind); |
ddf97ccd | 95 | int (*walk)(struct net *, struct sk_buff *, |
a85a970a | 96 | struct netlink_callback *, int, const struct tc_action_ops *); |
38040702 | 97 | void (*stats_update)(struct tc_action *, u64, u32, u64); |
843e79d0 | 98 | struct net_device *(*get_dev)(const struct tc_action *a); |
ddf97ccd WC |
99 | }; |
100 | ||
101 | struct tc_action_net { | |
65a206c0 | 102 | struct tcf_idrinfo *idrinfo; |
ddf97ccd | 103 | const struct tc_action_ops *ops; |
1da177e4 LT |
104 | }; |
105 | ||
ddf97ccd | 106 | static inline |
8f4d0354 | 107 | int tc_action_net_init(struct net *net, struct tc_action_net *tn, |
c7e460ce | 108 | const struct tc_action_ops *ops) |
ddf97ccd WC |
109 | { |
110 | int err = 0; | |
111 | ||
65a206c0 CM |
112 | tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); |
113 | if (!tn->idrinfo) | |
ddf97ccd WC |
114 | return -ENOMEM; |
115 | tn->ops = ops; | |
8f4d0354 | 116 | tn->idrinfo->net = net; |
65a206c0 CM |
117 | spin_lock_init(&tn->idrinfo->lock); |
118 | idr_init(&tn->idrinfo->action_idr); | |
ddf97ccd WC |
119 | return err; |
120 | } | |
121 | ||
65a206c0 CM |
122 | void tcf_idrinfo_destroy(const struct tc_action_ops *ops, |
123 | struct tcf_idrinfo *idrinfo); | |
ddf97ccd WC |
124 | |
125 | static inline void tc_action_net_exit(struct tc_action_net *tn) | |
126 | { | |
a159d3c4 | 127 | rtnl_lock(); |
65a206c0 | 128 | tcf_idrinfo_destroy(tn->ops, tn->idrinfo); |
a159d3c4 | 129 | rtnl_unlock(); |
65a206c0 | 130 | kfree(tn->idrinfo); |
ddf97ccd WC |
131 | } |
132 | ||
133 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, | |
134 | struct netlink_callback *cb, int type, | |
a85a970a | 135 | const struct tc_action_ops *ops); |
65a206c0 CM |
136 | int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); |
137 | bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, | |
b2313077 | 138 | int bind); |
65a206c0 CM |
139 | int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
140 | struct tc_action **a, const struct tc_action_ops *ops, | |
141 | int bind, bool cpustats); | |
142 | void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est); | |
143 | void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); | |
e9ce1cd3 | 144 | |
65a206c0 | 145 | int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); |
28e6b67f | 146 | |
65a206c0 | 147 | static inline int tcf_idr_release(struct tc_action *a, bool bind) |
28e6b67f | 148 | { |
65a206c0 | 149 | return __tcf_idr_release(a, bind, false); |
28e6b67f DB |
150 | } |
151 | ||
ddf97ccd | 152 | int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); |
0b0f43fe JHS |
153 | int tcf_unregister_action(struct tc_action_ops *a, |
154 | struct pernet_operations *ops); | |
55334a5d | 155 | int tcf_action_destroy(struct list_head *actions, int bind); |
22dc13c8 WC |
156 | int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, |
157 | int nr_actions, struct tcf_result *res); | |
9fb9f251 JP |
158 | int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, |
159 | struct nlattr *est, char *name, int ovr, int bind, | |
160 | struct list_head *actions); | |
161 | struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, | |
162 | struct nlattr *nla, struct nlattr *est, | |
163 | char *name, int ovr, int bind); | |
33be6271 | 164 | int tcf_action_dump(struct sk_buff *skb, struct list_head *, int, int); |
5c15257f JP |
165 | int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); |
166 | int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); | |
167 | int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); | |
00175aec | 168 | |
2734437e | 169 | #endif /* CONFIG_NET_CLS_ACT */ |
86cb13e4 | 170 | |
38040702 AV |
171 | static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, |
172 | u64 packets, u64 lastuse) | |
173 | { | |
2734437e | 174 | #ifdef CONFIG_NET_CLS_ACT |
38040702 AV |
175 | if (!a->ops->stats_update) |
176 | return; | |
177 | ||
178 | a->ops->stats_update(a, bytes, packets, lastuse); | |
2734437e | 179 | #endif |
38040702 AV |
180 | } |
181 | ||
b3f55bdd JP |
182 | typedef int tc_setup_cb_t(enum tc_setup_type type, |
183 | void *type_data, void *cb_priv); | |
184 | ||
185 | #ifdef CONFIG_NET_CLS_ACT | |
186 | int tc_setup_cb_egdev_register(const struct net_device *dev, | |
187 | tc_setup_cb_t *cb, void *cb_priv); | |
188 | void tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
189 | tc_setup_cb_t *cb, void *cb_priv); | |
190 | int tc_setup_cb_egdev_call(const struct net_device *dev, | |
191 | enum tc_setup_type type, void *type_data, | |
192 | bool err_stop); | |
193 | #else | |
194 | static inline | |
195 | int tc_setup_cb_egdev_register(const struct net_device *dev, | |
196 | tc_setup_cb_t *cb, void *cb_priv) | |
197 | { | |
198 | return 0; | |
199 | } | |
200 | ||
201 | static inline | |
202 | void tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
203 | tc_setup_cb_t *cb, void *cb_priv) | |
204 | { | |
205 | } | |
206 | ||
207 | static inline | |
208 | int tc_setup_cb_egdev_call(const struct net_device *dev, | |
209 | enum tc_setup_type type, void *type_data, | |
210 | bool err_stop) | |
211 | { | |
212 | return 0; | |
213 | } | |
214 | #endif | |
215 | ||
1da177e4 | 216 | #endif |