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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#ifndef __NET_ACT_API_H
3#define __NET_ACT_API_H
4
5/*
Jamal Hadi Salim0b0f43f2016-06-05 10:41:32 -04006 * Public action API for classifiers/qdiscs
7*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
Vlad Buslov036bb442018-07-05 17:24:24 +03009#include <linux/refcount.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <net/sch_generic.h>
11#include <net/pkt_sched.h>
WANG Congddf97cc2016-02-22 15:57:53 -080012#include <net/net_namespace.h>
13#include <net/netns/generic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014
Chris Mi65a206c2017-08-30 02:31:59 -040015struct tcf_idrinfo {
Cong Wang95278dd2018-10-02 12:50:19 -070016 struct mutex lock;
Chris Mi65a206c2017-08-30 02:31:59 -040017 struct idr action_idr;
Cong Wang981471bd2019-08-25 10:01:32 -070018 struct net *net;
WANG Conga85a9702016-07-25 16:09:41 -070019};
20
21struct tc_action_ops;
22
23struct tc_action {
24 const struct tc_action_ops *ops;
WANG Congec0595c2016-07-25 16:09:42 -070025 __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
Chris Mi65a206c2017-08-30 02:31:59 -040026 struct tcf_idrinfo *idrinfo;
WANG Conga85a9702016-07-25 16:09:41 -070027
WANG Congec0595c2016-07-25 16:09:42 -070028 u32 tcfa_index;
Vlad Buslov036bb442018-07-05 17:24:24 +030029 refcount_t tcfa_refcnt;
30 atomic_t tcfa_bindcnt;
WANG Congec0595c2016-07-25 16:09:42 -070031 int tcfa_action;
32 struct tcf_t tcfa_tm;
33 struct gnet_stats_basic_packed tcfa_bstats;
Eelco Chaudron28169ab2018-09-21 07:14:02 -040034 struct gnet_stats_basic_packed tcfa_bstats_hw;
WANG Congec0595c2016-07-25 16:09:42 -070035 struct gnet_stats_queue tcfa_qstats;
Eric Dumazet1c0d32f2016-12-04 09:48:16 -080036 struct net_rate_estimator __rcu *tcfa_rate_est;
WANG Congec0595c2016-07-25 16:09:42 -070037 spinlock_t tcfa_lock;
Eric Dumazet519c8182015-07-06 05:18:04 -070038 struct gnet_stats_basic_cpu __percpu *cpu_bstats;
Eelco Chaudron28169ab2018-09-21 07:14:02 -040039 struct gnet_stats_basic_cpu __percpu *cpu_bstats_hw;
Eric Dumazet519c8182015-07-06 05:18:04 -070040 struct gnet_stats_queue __percpu *cpu_qstats;
Vlad Busloveec94fd2018-07-05 17:24:23 +030041 struct tc_cookie __rcu *act_cookie;
Davide Carattiee3bbfe2019-03-20 15:00:16 +010042 struct tcf_chain __rcu *goto_chain;
Vlad Buslove3822672019-10-30 16:09:06 +020043 u32 tcfa_flags;
Jakub Kicinski0dfb2d82020-03-19 16:26:23 -070044 u8 hw_stats;
Jiri Pirko93a129e2020-03-28 16:37:43 +010045 u8 used_hw_stats;
46 bool used_hw_stats_valid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047};
WANG Congec0595c2016-07-25 16:09:42 -070048#define tcf_index common.tcfa_index
49#define tcf_refcnt common.tcfa_refcnt
50#define tcf_bindcnt common.tcfa_bindcnt
WANG Congec0595c2016-07-25 16:09:42 -070051#define tcf_action common.tcfa_action
52#define tcf_tm common.tcfa_tm
53#define tcf_bstats common.tcfa_bstats
54#define tcf_qstats common.tcfa_qstats
55#define tcf_rate_est common.tcfa_rate_est
56#define tcf_lock common.tcfa_lock
David S. Millere9ce1cd2006-08-21 23:54:55 -070057
Jakub Kicinski0dfb2d82020-03-19 16:26:23 -070058#define TCA_ACT_HW_STATS_ANY (TCA_ACT_HW_STATS_IMMEDIATE | \
59 TCA_ACT_HW_STATS_DELAYED)
Jiri Pirko44f86582020-03-07 12:40:20 +010060
Eric Dumazet56e5d1c2015-07-06 05:18:08 -070061/* Update lastuse only if needed, to avoid dirtying a cache line.
62 * We use a temp variable to avoid fetching jiffies twice.
63 */
64static inline void tcf_lastuse_update(struct tcf_t *tm)
65{
66 unsigned long now = jiffies;
67
68 if (tm->lastuse != now)
69 tm->lastuse = now;
Jamal Hadi Salim53eb4402016-06-06 06:32:54 -040070 if (unlikely(!tm->firstuse))
71 tm->firstuse = now;
Eric Dumazet56e5d1c2015-07-06 05:18:08 -070072}
73
Jamal Hadi Salim48d8ee12016-06-06 06:32:55 -040074static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm)
75{
76 dtm->install = jiffies_to_clock_t(jiffies - stm->install);
77 dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse);
Roman Mashakb15e6262020-05-17 08:46:31 -040078 dtm->firstuse = stm->firstuse ?
79 jiffies_to_clock_t(jiffies - stm->firstuse) : 0;
Jamal Hadi Salim48d8ee12016-06-06 06:32:55 -040080 dtm->expires = jiffies_to_clock_t(stm->expires);
81}
82
Amir Vadai00175ae2016-03-08 12:42:31 +020083#ifdef CONFIG_NET_CLS_ACT
84
85#define ACT_P_CREATED 1
86#define ACT_P_DELETED 1
87
Vlad Buslov4a5da472019-09-13 18:28:40 +030088typedef void (*tc_action_priv_destructor)(void *priv);
89
David S. Millere9ce1cd2006-08-21 23:54:55 -070090struct tc_action_ops {
WANG Cong1f747c22013-12-15 20:15:10 -080091 struct list_head head;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 char kind[IFNAMSIZ];
Eli Coheneddd2cf2019-02-10 14:25:00 +020093 enum tca_id id; /* identifier should match kind */
WANG Conga85a9702016-07-25 16:09:41 -070094 size_t size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 struct module *owner;
Jamal Hadi Salim0b0f43f2016-06-05 10:41:32 -040096 int (*act)(struct sk_buff *, const struct tc_action *,
Paolo Abeni7fd4b282018-07-30 14:30:43 +020097 struct tcf_result *); /* called under RCU BH lock*/
David S. Millere9ce1cd2006-08-21 23:54:55 -070098 int (*dump)(struct sk_buff *, struct tc_action *, int, int);
Cong Wang9a63b252017-12-05 12:53:07 -080099 void (*cleanup)(struct tc_action *);
Cong Wangf061b482018-08-29 10:15:35 -0700100 int (*lookup)(struct net *net, struct tc_action **a, u32 index);
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000101 int (*init)(struct net *net, struct nlattr *nla,
WANG Conga85a9702016-07-25 16:09:41 -0700102 struct nlattr *est, struct tc_action **act, int ovr,
Davide Caratti85d09662019-03-20 14:59:59 +0100103 int bind, bool rtnl_held, struct tcf_proto *tp,
Vlad Buslovabbb0d32019-10-30 16:09:05 +0200104 u32 flags, struct netlink_ext_ack *extack);
WANG Congddf97cc2016-02-22 15:57:53 -0800105 int (*walk)(struct net *, struct sk_buff *,
Alexander Aring1af8515582018-02-15 10:54:53 -0500106 struct netlink_callback *, int,
Alexander Aring41780102018-02-15 10:54:58 -0500107 const struct tc_action_ops *,
108 struct netlink_ext_ack *);
Po Liu4b61d3e2020-06-19 14:01:07 +0800109 void (*stats_update)(struct tc_action *, u64, u64, u64, u64, bool);
Roman Mashaka03b91b2018-03-08 16:59:18 -0500110 size_t (*get_fill_size)(const struct tc_action *act);
Vlad Buslov470d5062019-09-13 18:28:41 +0300111 struct net_device *(*get_dev)(const struct tc_action *a,
112 tc_action_priv_destructor *destructor);
Vlad Buslov4a5da472019-09-13 18:28:40 +0300113 struct psample_group *
114 (*get_psample_group)(const struct tc_action *a,
115 tc_action_priv_destructor *destructor);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116};
117
WANG Congddf97cc2016-02-22 15:57:53 -0800118struct tc_action_net {
Chris Mi65a206c2017-08-30 02:31:59 -0400119 struct tcf_idrinfo *idrinfo;
WANG Congddf97cc2016-02-22 15:57:53 -0800120 const struct tc_action_ops *ops;
121};
122
123static inline
Cong Wang981471bd2019-08-25 10:01:32 -0700124int tc_action_net_init(struct net *net, struct tc_action_net *tn,
Cong Wangc7e460c2017-11-06 13:47:18 -0800125 const struct tc_action_ops *ops)
WANG Congddf97cc2016-02-22 15:57:53 -0800126{
127 int err = 0;
128
Chris Mi65a206c2017-08-30 02:31:59 -0400129 tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL);
130 if (!tn->idrinfo)
WANG Congddf97cc2016-02-22 15:57:53 -0800131 return -ENOMEM;
132 tn->ops = ops;
Cong Wang981471bd2019-08-25 10:01:32 -0700133 tn->idrinfo->net = net;
Cong Wang95278dd2018-10-02 12:50:19 -0700134 mutex_init(&tn->idrinfo->lock);
Chris Mi65a206c2017-08-30 02:31:59 -0400135 idr_init(&tn->idrinfo->action_idr);
WANG Congddf97cc2016-02-22 15:57:53 -0800136 return err;
137}
138
Chris Mi65a206c2017-08-30 02:31:59 -0400139void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
140 struct tcf_idrinfo *idrinfo);
WANG Congddf97cc2016-02-22 15:57:53 -0800141
Cong Wang039af9c2017-12-11 15:35:03 -0800142static inline void tc_action_net_exit(struct list_head *net_list,
143 unsigned int id)
WANG Congddf97cc2016-02-22 15:57:53 -0800144{
Cong Wang039af9c2017-12-11 15:35:03 -0800145 struct net *net;
146
Cong Wanga159d3c2017-11-01 10:23:49 -0700147 rtnl_lock();
Cong Wang039af9c2017-12-11 15:35:03 -0800148 list_for_each_entry(net, net_list, exit_list) {
149 struct tc_action_net *tn = net_generic(net, id);
150
151 tcf_idrinfo_destroy(tn->ops, tn->idrinfo);
152 kfree(tn->idrinfo);
153 }
Cong Wanga159d3c2017-11-01 10:23:49 -0700154 rtnl_unlock();
WANG Congddf97cc2016-02-22 15:57:53 -0800155}
156
157int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
158 struct netlink_callback *cb, int type,
Alexander Aringb3620142018-02-15 10:54:59 -0500159 const struct tc_action_ops *ops,
160 struct netlink_ext_ack *extack);
Chris Mi65a206c2017-08-30 02:31:59 -0400161int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index);
Chris Mi65a206c2017-08-30 02:31:59 -0400162int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
163 struct tc_action **a, const struct tc_action_ops *ops,
Vlad Buslove3822672019-10-30 16:09:06 +0200164 int bind, bool cpustats, u32 flags);
165int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index,
166 struct nlattr *est, struct tc_action **a,
167 const struct tc_action_ops *ops, int bind,
168 u32 flags);
Chris Mi65a206c2017-08-30 02:31:59 -0400169void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700170
Vlad Buslov0190c1d2018-07-05 17:24:32 +0300171void tcf_idr_cleanup(struct tc_action_net *tn, u32 index);
172int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index,
173 struct tc_action **a, int bind);
Chris Mi65a206c2017-08-30 02:31:59 -0400174int __tcf_idr_release(struct tc_action *a, bool bind, bool strict);
Daniel Borkmann28e6b672015-07-29 23:35:25 +0200175
Chris Mi65a206c2017-08-30 02:31:59 -0400176static inline int tcf_idr_release(struct tc_action *a, bool bind)
Daniel Borkmann28e6b672015-07-29 23:35:25 +0200177{
Chris Mi65a206c2017-08-30 02:31:59 -0400178 return __tcf_idr_release(a, bind, false);
Daniel Borkmann28e6b672015-07-29 23:35:25 +0200179}
180
WANG Congddf97cc2016-02-22 15:57:53 -0800181int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops);
Jamal Hadi Salim0b0f43f2016-06-05 10:41:32 -0400182int tcf_unregister_action(struct tc_action_ops *a,
183 struct pernet_operations *ops);
Vlad Buslov90b73b72018-07-05 17:24:33 +0300184int tcf_action_destroy(struct tc_action *actions[], int bind);
WANG Cong22dc13c2016-08-13 22:35:00 -0700185int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
186 int nr_actions, struct tcf_result *res);
Jiri Pirko9fb9f252017-05-17 11:08:02 +0200187int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
188 struct nlattr *est, char *name, int ovr, int bind,
Vlad Buslov90b73b72018-07-05 17:24:33 +0300189 struct tc_action *actions[], size_t *attr_size,
Vlad Buslov789871b2018-07-05 17:24:25 +0300190 bool rtnl_held, struct netlink_ext_ack *extack);
Jiri Pirko9fb9f252017-05-17 11:08:02 +0200191struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp,
192 struct nlattr *nla, struct nlattr *est,
Alexander Aringaea0d722018-02-15 10:54:54 -0500193 char *name, int ovr, int bind,
Vlad Buslov789871b2018-07-05 17:24:25 +0300194 bool rtnl_held,
Alexander Aringaea0d722018-02-15 10:54:54 -0500195 struct netlink_ext_ack *extack);
Vlad Buslov90b73b72018-07-05 17:24:33 +0300196int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind,
Vlad Buslovca44b732020-05-15 14:40:12 +0300197 int ref, bool terse);
Joe Perches5c152572013-07-30 22:47:13 -0700198int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int);
199int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int);
Vlad Buslov5e1ad952019-10-30 16:09:01 +0200200
201static inline void tcf_action_update_bstats(struct tc_action *a,
202 struct sk_buff *skb)
203{
Vlad Buslov5e174d52019-10-30 16:09:04 +0200204 if (likely(a->cpu_bstats)) {
205 bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), skb);
206 return;
207 }
208 spin_lock(&a->tcfa_lock);
209 bstats_update(&a->tcfa_bstats, skb);
210 spin_unlock(&a->tcfa_lock);
Vlad Buslov26b537a2019-10-30 16:09:02 +0200211}
212
213static inline void tcf_action_inc_drop_qstats(struct tc_action *a)
214{
Vlad Buslov5e174d52019-10-30 16:09:04 +0200215 if (likely(a->cpu_qstats)) {
216 qstats_drop_inc(this_cpu_ptr(a->cpu_qstats));
217 return;
218 }
219 spin_lock(&a->tcfa_lock);
220 qstats_drop_inc(&a->tcfa_qstats);
221 spin_unlock(&a->tcfa_lock);
Vlad Buslov26b537a2019-10-30 16:09:02 +0200222}
223
224static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a)
225{
Vlad Buslov5e174d52019-10-30 16:09:04 +0200226 if (likely(a->cpu_qstats)) {
227 qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats));
228 return;
229 }
230 spin_lock(&a->tcfa_lock);
231 qstats_overlimit_inc(&a->tcfa_qstats);
232 spin_unlock(&a->tcfa_lock);
Vlad Buslov26b537a2019-10-30 16:09:02 +0200233}
234
Po Liu4b61d3e2020-06-19 14:01:07 +0800235void tcf_action_update_stats(struct tc_action *a, u64 bytes, u64 packets,
236 u64 drops, bool hw);
Joe Perches5c152572013-07-30 22:47:13 -0700237int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int);
Amir Vadai00175ae2016-03-08 12:42:31 +0200238
Davide Caratti85d09662019-03-20 14:59:59 +0100239int tcf_action_check_ctrlact(int action, struct tcf_proto *tp,
240 struct tcf_chain **handle,
241 struct netlink_ext_ack *newchain);
242struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action,
243 struct tcf_chain *newchain);
WANG Cong2734437e2016-08-13 22:34:59 -0700244#endif /* CONFIG_NET_CLS_ACT */
Ido Schimmel86cb13e2016-07-25 13:12:33 +0300245
Amir Vadai38040702016-05-13 12:55:35 +0000246static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes,
Po Liu4b61d3e2020-06-19 14:01:07 +0800247 u64 packets, u64 drops,
248 u64 lastuse, bool hw)
Amir Vadai38040702016-05-13 12:55:35 +0000249{
WANG Cong2734437e2016-08-13 22:34:59 -0700250#ifdef CONFIG_NET_CLS_ACT
Amir Vadai38040702016-05-13 12:55:35 +0000251 if (!a->ops->stats_update)
252 return;
253
Po Liu4b61d3e2020-06-19 14:01:07 +0800254 a->ops->stats_update(a, bytes, packets, drops, lastuse, hw);
WANG Cong2734437e2016-08-13 22:34:59 -0700255#endif
Amir Vadai38040702016-05-13 12:55:35 +0000256}
257
Jiri Pirkob3f55bd2017-10-11 09:41:08 +0200258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259#endif