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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 | 8 | |
036bb443 | 9 | #include <linux/refcount.h> |
1da177e4 LT |
10 | #include <net/sch_generic.h> |
11 | #include <net/pkt_sched.h> | |
ddf97ccd WC |
12 | #include <net/net_namespace.h> |
13 | #include <net/netns/generic.h> | |
1da177e4 | 14 | |
65a206c0 CM |
15 | struct tcf_idrinfo { |
16 | spinlock_t lock; | |
17 | struct idr action_idr; | |
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 | 29 | u32 tcfa_index; |
036bb443 VB |
30 | refcount_t tcfa_refcnt; |
31 | atomic_t tcfa_bindcnt; | |
ec0595cc WC |
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; | |
eec94fdb | 41 | struct tc_cookie __rcu *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 | 87 | int (*act)(struct sk_buff *, const struct tc_action *, |
7fd4b288 | 88 | struct tcf_result *); /* called under RCU BH lock*/ |
e9ce1cd3 | 89 | int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
9a63b255 | 90 | void (*cleanup)(struct tc_action *); |
331a9295 AA |
91 | int (*lookup)(struct net *net, struct tc_action **a, u32 index, |
92 | struct netlink_ext_ack *extack); | |
c1b52739 | 93 | int (*init)(struct net *net, struct nlattr *nla, |
a85a970a | 94 | struct nlattr *est, struct tc_action **act, int ovr, |
789871bb VB |
95 | int bind, bool rtnl_held, |
96 | struct netlink_ext_ack *extack); | |
ddf97ccd | 97 | int (*walk)(struct net *, struct sk_buff *, |
1af85155 | 98 | struct netlink_callback *, int, |
41780105 AA |
99 | const struct tc_action_ops *, |
100 | struct netlink_ext_ack *); | |
38040702 | 101 | void (*stats_update)(struct tc_action *, u64, u32, u64); |
a03b91b1 | 102 | size_t (*get_fill_size)(const struct tc_action *act); |
843e79d0 | 103 | struct net_device *(*get_dev)(const struct tc_action *a); |
84a75b32 | 104 | void (*put_dev)(struct net_device *dev); |
b409074e | 105 | int (*delete)(struct net *net, u32 index); |
ddf97ccd WC |
106 | }; |
107 | ||
108 | struct tc_action_net { | |
65a206c0 | 109 | struct tcf_idrinfo *idrinfo; |
ddf97ccd | 110 | const struct tc_action_ops *ops; |
1da177e4 LT |
111 | }; |
112 | ||
ddf97ccd | 113 | static inline |
0b0f43fe | 114 | int tc_action_net_init(struct tc_action_net *tn, |
c7e460ce | 115 | const struct tc_action_ops *ops) |
ddf97ccd WC |
116 | { |
117 | int err = 0; | |
118 | ||
65a206c0 CM |
119 | tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); |
120 | if (!tn->idrinfo) | |
ddf97ccd WC |
121 | return -ENOMEM; |
122 | tn->ops = ops; | |
65a206c0 CM |
123 | spin_lock_init(&tn->idrinfo->lock); |
124 | idr_init(&tn->idrinfo->action_idr); | |
ddf97ccd WC |
125 | return err; |
126 | } | |
127 | ||
65a206c0 CM |
128 | void tcf_idrinfo_destroy(const struct tc_action_ops *ops, |
129 | struct tcf_idrinfo *idrinfo); | |
ddf97ccd | 130 | |
039af9c6 CW |
131 | static inline void tc_action_net_exit(struct list_head *net_list, |
132 | unsigned int id) | |
ddf97ccd | 133 | { |
039af9c6 CW |
134 | struct net *net; |
135 | ||
a159d3c4 | 136 | rtnl_lock(); |
039af9c6 CW |
137 | list_for_each_entry(net, net_list, exit_list) { |
138 | struct tc_action_net *tn = net_generic(net, id); | |
139 | ||
140 | tcf_idrinfo_destroy(tn->ops, tn->idrinfo); | |
141 | kfree(tn->idrinfo); | |
142 | } | |
a159d3c4 | 143 | rtnl_unlock(); |
ddf97ccd WC |
144 | } |
145 | ||
146 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, | |
147 | struct netlink_callback *cb, int type, | |
b3620145 AA |
148 | const struct tc_action_ops *ops, |
149 | struct netlink_ext_ack *extack); | |
65a206c0 CM |
150 | int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); |
151 | bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a, | |
b2313077 | 152 | int bind); |
65a206c0 CM |
153 | int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
154 | struct tc_action **a, const struct tc_action_ops *ops, | |
155 | int bind, bool cpustats); | |
65a206c0 | 156 | void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); |
e9ce1cd3 | 157 | |
0190c1d4 VB |
158 | void tcf_idr_cleanup(struct tc_action_net *tn, u32 index); |
159 | int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index, | |
160 | struct tc_action **a, int bind); | |
2a2ea349 | 161 | int tcf_idr_delete_index(struct tc_action_net *tn, u32 index); |
65a206c0 | 162 | int __tcf_idr_release(struct tc_action *a, bool bind, bool strict); |
28e6b67f | 163 | |
65a206c0 | 164 | static inline int tcf_idr_release(struct tc_action *a, bool bind) |
28e6b67f | 165 | { |
65a206c0 | 166 | return __tcf_idr_release(a, bind, false); |
28e6b67f DB |
167 | } |
168 | ||
ddf97ccd | 169 | int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); |
0b0f43fe JHS |
170 | int tcf_unregister_action(struct tc_action_ops *a, |
171 | struct pernet_operations *ops); | |
90b73b77 | 172 | int tcf_action_destroy(struct tc_action *actions[], int bind); |
22dc13c8 WC |
173 | int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, |
174 | int nr_actions, struct tcf_result *res); | |
9fb9f251 JP |
175 | int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, |
176 | struct nlattr *est, char *name, int ovr, int bind, | |
90b73b77 | 177 | struct tc_action *actions[], size_t *attr_size, |
789871bb | 178 | bool rtnl_held, struct netlink_ext_ack *extack); |
9fb9f251 JP |
179 | struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, |
180 | struct nlattr *nla, struct nlattr *est, | |
aea0d727 | 181 | char *name, int ovr, int bind, |
789871bb | 182 | bool rtnl_held, |
aea0d727 | 183 | struct netlink_ext_ack *extack); |
90b73b77 VB |
184 | int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind, |
185 | int ref); | |
5c15257f JP |
186 | int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); |
187 | int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); | |
188 | int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); | |
00175aec | 189 | |
2734437e | 190 | #endif /* CONFIG_NET_CLS_ACT */ |
86cb13e4 | 191 | |
38040702 AV |
192 | static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, |
193 | u64 packets, u64 lastuse) | |
194 | { | |
2734437e | 195 | #ifdef CONFIG_NET_CLS_ACT |
38040702 AV |
196 | if (!a->ops->stats_update) |
197 | return; | |
198 | ||
199 | a->ops->stats_update(a, bytes, packets, lastuse); | |
2734437e | 200 | #endif |
38040702 AV |
201 | } |
202 | ||
b3f55bdd JP |
203 | #ifdef CONFIG_NET_CLS_ACT |
204 | int tc_setup_cb_egdev_register(const struct net_device *dev, | |
205 | tc_setup_cb_t *cb, void *cb_priv); | |
206 | void tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
207 | tc_setup_cb_t *cb, void *cb_priv); | |
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 | #else | |
212 | static inline | |
213 | int tc_setup_cb_egdev_register(const struct net_device *dev, | |
214 | tc_setup_cb_t *cb, void *cb_priv) | |
215 | { | |
216 | return 0; | |
217 | } | |
218 | ||
219 | static inline | |
220 | void tc_setup_cb_egdev_unregister(const struct net_device *dev, | |
221 | tc_setup_cb_t *cb, void *cb_priv) | |
222 | { | |
223 | } | |
224 | ||
225 | static inline | |
226 | int tc_setup_cb_egdev_call(const struct net_device *dev, | |
227 | enum tc_setup_type type, void *type_data, | |
228 | bool err_stop) | |
229 | { | |
230 | return 0; | |
231 | } | |
232 | #endif | |
233 | ||
1da177e4 | 234 | #endif |