split dev_queue
[cor.git] / include / net / act_api.h
blob71347a90a9d1d769fc801412b0a21c1452fd56fe
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NET_ACT_API_H
3 #define __NET_ACT_API_H
5 /*
6 * Public action API for classifiers/qdiscs
7 */
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>
15 struct tcf_idrinfo {
16 struct mutex lock;
17 struct idr action_idr;
18 struct net *net;
21 struct tc_action_ops;
23 struct tc_action {
24 const struct tc_action_ops *ops;
25 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
26 struct tcf_idrinfo *idrinfo;
28 u32 tcfa_index;
29 refcount_t tcfa_refcnt;
30 atomic_t tcfa_bindcnt;
31 int tcfa_action;
32 struct tcf_t tcfa_tm;
33 struct gnet_stats_basic_packed tcfa_bstats;
34 struct gnet_stats_basic_packed tcfa_bstats_hw;
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_basic_cpu __percpu *cpu_bstats_hw;
40 struct gnet_stats_queue __percpu *cpu_qstats;
41 struct tc_cookie __rcu *act_cookie;
42 struct tcf_chain __rcu *goto_chain;
43 u32 tcfa_flags;
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
55 /* Update lastuse only if needed, to avoid dirtying a cache line.
56 * We use a temp variable to avoid fetching jiffies twice.
58 static inline void tcf_lastuse_update(struct tcf_t *tm)
60 unsigned long now = jiffies;
62 if (tm->lastuse != now)
63 tm->lastuse = now;
64 if (unlikely(!tm->firstuse))
65 tm->firstuse = now;
68 static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
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);
76 #ifdef CONFIG_NET_CLS_ACT
78 #define ACT_P_CREATED 1
79 #define ACT_P_DELETED 1
81 typedef void (*tc_action_priv_destructor)(void *priv);
83 struct 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 u32 flags, 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);
111 struct tc_action_net {
112 struct tcf_idrinfo *idrinfo;
113 const struct tc_action_ops *ops;
116 static inline
117 int tc_action_net_init(struct net *net, struct tc_action_net *tn,
118 const struct tc_action_ops *ops)
120 int err = 0;
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;
132 void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
133 struct tcf_idrinfo *idrinfo);
135 static inline void tc_action_net_exit(struct list_head *net_list,
136 unsigned int id)
138 struct net *net;
140 rtnl_lock();
141 list_for_each_entry(net, net_list, exit_list) {
142 struct tc_action_net *tn = net_generic(net, id);
144 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
145 kfree(tn->idrinfo);
147 rtnl_unlock();
150 int 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);
154 int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
155 int 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, u32 flags);
158 int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index,
159 struct nlattr *est, struct tc_action **a,
160 const struct tc_action_ops *ops, int bind,
161 u32 flags);
162 void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
164 void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
165 int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
166 struct tc_action **a, int bind);
167 int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
169 static inline int tcf_idr_release(struct tc_action *a, bool bind)
171 return __tcf_idr_release(a, bind, false);
174 int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
175 int tcf_unregister_action(struct tc_action_ops *a,
176 struct pernet_operations *ops);
177 int tcf_action_destroy(struct tc_action *actions[], int bind);
178 int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
179 int nr_actions, struct tcf_result *res);
180 int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
181 struct nlattr *est, char *name, int ovr, int bind,
182 struct tc_action *actions[], size_t *attr_size,
183 bool rtnl_held, struct netlink_ext_ack *extack);
184 struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
185 struct nlattr *nla, struct nlattr *est,
186 char *name, int ovr, int bind,
187 bool rtnl_held,
188 struct netlink_ext_ack *extack);
189 int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
190 int ref);
191 int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
192 int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
194 static inline void tcf_action_update_bstats(struct tc_action *a,
195 struct sk_buff *skb)
197 if (likely(a->cpu_bstats)) {
198 bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), skb);
199 return;
201 spin_lock(&a->tcfa_lock);
202 bstats_update(&a->tcfa_bstats, skb);
203 spin_unlock(&a->tcfa_lock);
206 static inline void tcf_action_inc_drop_qstats(struct tc_action *a)
208 if (likely(a->cpu_qstats)) {
209 qstats_drop_inc(this_cpu_ptr(a->cpu_qstats));
210 return;
212 spin_lock(&a->tcfa_lock);
213 qstats_drop_inc(&a->tcfa_qstats);
214 spin_unlock(&a->tcfa_lock);
217 static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a)
219 if (likely(a->cpu_qstats)) {
220 qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats));
221 return;
223 spin_lock(&a->tcfa_lock);
224 qstats_overlimit_inc(&a->tcfa_qstats);
225 spin_unlock(&a->tcfa_lock);
228 void tcf_action_update_stats(struct tc_action *a, u64 bytes, u32 packets,
229 bool drop, bool hw);
230 int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
232 int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
233 struct tcf_chain **handle,
234 struct netlink_ext_ack *newchain);
235 struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
236 struct tcf_chain *newchain);
237 #endif /* CONFIG_NET_CLS_ACT */
239 static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
240 u64 packets, u64 lastuse, bool hw)
242 #ifdef CONFIG_NET_CLS_ACT
243 if (!a->ops->stats_update)
244 return;
246 a->ops->stats_update(a, bytes, packets, lastuse, hw);
247 #endif
251 #endif