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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> |
13926d19 | 10 | #include <net/flow_offload.h> |
1da177e4 LT |
11 | #include <net/sch_generic.h> |
12 | #include <net/pkt_sched.h> | |
ddf97ccd WC |
13 | #include <net/net_namespace.h> |
14 | #include <net/netns/generic.h> | |
1da177e4 | 15 | |
65a206c0 | 16 | struct tcf_idrinfo { |
95278dda | 17 | struct mutex lock; |
65a206c0 | 18 | struct idr action_idr; |
981471bd | 19 | struct net *net; |
a85a970a WC |
20 | }; |
21 | ||
22 | struct tc_action_ops; | |
23 | ||
24 | struct tc_action { | |
25 | const struct tc_action_ops *ops; | |
ec0595cc | 26 | __u32 type; /* for backward compat(TCA_OLD_COMPAT) */ |
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 | int tcfa_action; |
33 | struct tcf_t tcfa_tm; | |
50dc9a85 AD |
34 | struct gnet_stats_basic_sync tcfa_bstats; |
35 | struct gnet_stats_basic_sync tcfa_bstats_hw; | |
ec0595cc | 36 | struct gnet_stats_queue tcfa_qstats; |
1c0d32fd | 37 | struct net_rate_estimator __rcu *tcfa_rate_est; |
ec0595cc | 38 | spinlock_t tcfa_lock; |
50dc9a85 AD |
39 | struct gnet_stats_basic_sync __percpu *cpu_bstats; |
40 | struct gnet_stats_basic_sync __percpu *cpu_bstats_hw; | |
519c818e | 41 | struct gnet_stats_queue __percpu *cpu_qstats; |
db4b4902 | 42 | struct tc_cookie __rcu *user_cookie; |
ee3bbfe8 | 43 | struct tcf_chain __rcu *goto_chain; |
e3822678 | 44 | u32 tcfa_flags; |
0dfb2d82 | 45 | u8 hw_stats; |
93a129eb JP |
46 | u8 used_hw_stats; |
47 | bool used_hw_stats_valid; | |
7adc5765 | 48 | u32 in_hw_count; |
e9ce1cd3 | 49 | }; |
ec0595cc WC |
50 | #define tcf_index common.tcfa_index |
51 | #define tcf_refcnt common.tcfa_refcnt | |
52 | #define tcf_bindcnt common.tcfa_bindcnt | |
ec0595cc WC |
53 | #define tcf_action common.tcfa_action |
54 | #define tcf_tm common.tcfa_tm | |
55 | #define tcf_bstats common.tcfa_bstats | |
56 | #define tcf_qstats common.tcfa_qstats | |
57 | #define tcf_rate_est common.tcfa_rate_est | |
58 | #define tcf_lock common.tcfa_lock | |
e9ce1cd3 | 59 | |
0dfb2d82 JK |
60 | #define TCA_ACT_HW_STATS_ANY (TCA_ACT_HW_STATS_IMMEDIATE | \ |
61 | TCA_ACT_HW_STATS_DELAYED) | |
44f86580 | 62 | |
695176bf CW |
63 | /* Reserve 16 bits for user-space. See TCA_ACT_FLAGS_NO_PERCPU_STATS. */ |
64 | #define TCA_ACT_FLAGS_USER_BITS 16 | |
65 | #define TCA_ACT_FLAGS_USER_MASK 0xffff | |
66 | #define TCA_ACT_FLAGS_POLICE (1U << TCA_ACT_FLAGS_USER_BITS) | |
67 | #define TCA_ACT_FLAGS_BIND (1U << (TCA_ACT_FLAGS_USER_BITS + 1)) | |
68 | #define TCA_ACT_FLAGS_REPLACE (1U << (TCA_ACT_FLAGS_USER_BITS + 2)) | |
69 | #define TCA_ACT_FLAGS_NO_RTNL (1U << (TCA_ACT_FLAGS_USER_BITS + 3)) | |
4a6a676f | 70 | #define TCA_ACT_FLAGS_AT_INGRESS (1U << (TCA_ACT_FLAGS_USER_BITS + 4)) |
695176bf | 71 | |
56e5d1ca ED |
72 | /* Update lastuse only if needed, to avoid dirtying a cache line. |
73 | * We use a temp variable to avoid fetching jiffies twice. | |
74 | */ | |
75 | static inline void tcf_lastuse_update(struct tcf_t *tm) | |
76 | { | |
77 | unsigned long now = jiffies; | |
78 | ||
79 | if (tm->lastuse != now) | |
80 | tm->lastuse = now; | |
53eb440f JHS |
81 | if (unlikely(!tm->firstuse)) |
82 | tm->firstuse = now; | |
56e5d1ca ED |
83 | } |
84 | ||
48d8ee16 JHS |
85 | static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) |
86 | { | |
87 | dtm->install = jiffies_to_clock_t(jiffies - stm->install); | |
88 | dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); | |
b15e6263 RM |
89 | dtm->firstuse = stm->firstuse ? |
90 | jiffies_to_clock_t(jiffies - stm->firstuse) : 0; | |
48d8ee16 JHS |
91 | dtm->expires = jiffies_to_clock_t(stm->expires); |
92 | } | |
93 | ||
c54e1d92 BZ |
94 | static inline enum flow_action_hw_stats tc_act_hw_stats(u8 hw_stats) |
95 | { | |
96 | if (WARN_ON_ONCE(hw_stats > TCA_ACT_HW_STATS_ANY)) | |
97 | return FLOW_ACTION_HW_STATS_DONT_CARE; | |
98 | else if (!hw_stats) | |
99 | return FLOW_ACTION_HW_STATS_DISABLED; | |
100 | ||
101 | return hw_stats; | |
102 | } | |
103 | ||
4a5da47d VB |
104 | typedef void (*tc_action_priv_destructor)(void *priv); |
105 | ||
e9ce1cd3 | 106 | struct tc_action_ops { |
1f747c26 | 107 | struct list_head head; |
1da177e4 | 108 | char kind[IFNAMSIZ]; |
eddd2cf1 | 109 | enum tca_id id; /* identifier should match kind */ |
acd0a7ab | 110 | unsigned int net_id; |
a85a970a | 111 | size_t size; |
1da177e4 | 112 | struct module *owner; |
0b0f43fe | 113 | int (*act)(struct sk_buff *, const struct tc_action *, |
7fd4b288 | 114 | struct tcf_result *); /* called under RCU BH lock*/ |
e9ce1cd3 | 115 | int (*dump)(struct sk_buff *, struct tc_action *, int, int); |
9a63b255 | 116 | void (*cleanup)(struct tc_action *); |
f061b48c | 117 | int (*lookup)(struct net *net, struct tc_action **a, u32 index); |
c1b52739 | 118 | int (*init)(struct net *net, struct nlattr *nla, |
695176bf CW |
119 | struct nlattr *est, struct tc_action **act, |
120 | struct tcf_proto *tp, | |
abbb0d33 | 121 | u32 flags, struct netlink_ext_ack *extack); |
ddf97ccd | 122 | int (*walk)(struct net *, struct sk_buff *, |
1af85155 | 123 | struct netlink_callback *, int, |
41780105 AA |
124 | const struct tc_action_ops *, |
125 | struct netlink_ext_ack *); | |
4b61d3e8 | 126 | void (*stats_update)(struct tc_action *, u64, u64, u64, u64, bool); |
a03b91b1 | 127 | size_t (*get_fill_size)(const struct tc_action *act); |
470d5060 VB |
128 | struct net_device *(*get_dev)(const struct tc_action *a, |
129 | tc_action_priv_destructor *destructor); | |
4a5da47d VB |
130 | struct psample_group * |
131 | (*get_psample_group)(const struct tc_action *a, | |
132 | tc_action_priv_destructor *destructor); | |
c54e1d92 | 133 | int (*offload_act_setup)(struct tc_action *act, void *entry_data, |
c2ccf84e IS |
134 | u32 *index_inc, bool bind, |
135 | struct netlink_ext_ack *extack); | |
ddf97ccd WC |
136 | }; |
137 | ||
2a7d228f PT |
138 | #ifdef CONFIG_NET_CLS_ACT |
139 | ||
c2a67de9 | 140 | #define ACT_P_BOUND 0 |
2a7d228f PT |
141 | #define ACT_P_CREATED 1 |
142 | #define ACT_P_DELETED 1 | |
143 | ||
ddf97ccd | 144 | struct tc_action_net { |
65a206c0 | 145 | struct tcf_idrinfo *idrinfo; |
ddf97ccd | 146 | const struct tc_action_ops *ops; |
1da177e4 LT |
147 | }; |
148 | ||
ddf97ccd | 149 | static inline |
981471bd | 150 | int tc_action_net_init(struct net *net, struct tc_action_net *tn, |
c7e460ce | 151 | const struct tc_action_ops *ops) |
ddf97ccd WC |
152 | { |
153 | int err = 0; | |
154 | ||
65a206c0 CM |
155 | tn->idrinfo = kmalloc(sizeof(*tn->idrinfo), GFP_KERNEL); |
156 | if (!tn->idrinfo) | |
ddf97ccd WC |
157 | return -ENOMEM; |
158 | tn->ops = ops; | |
981471bd | 159 | tn->idrinfo->net = net; |
95278dda | 160 | mutex_init(&tn->idrinfo->lock); |
65a206c0 | 161 | idr_init(&tn->idrinfo->action_idr); |
ddf97ccd WC |
162 | return err; |
163 | } | |
164 | ||
65a206c0 CM |
165 | void tcf_idrinfo_destroy(const struct tc_action_ops *ops, |
166 | struct tcf_idrinfo *idrinfo); | |
ddf97ccd | 167 | |
039af9c6 CW |
168 | static inline void tc_action_net_exit(struct list_head *net_list, |
169 | unsigned int id) | |
ddf97ccd | 170 | { |
039af9c6 CW |
171 | struct net *net; |
172 | ||
a159d3c4 | 173 | rtnl_lock(); |
039af9c6 CW |
174 | list_for_each_entry(net, net_list, exit_list) { |
175 | struct tc_action_net *tn = net_generic(net, id); | |
176 | ||
177 | tcf_idrinfo_destroy(tn->ops, tn->idrinfo); | |
178 | kfree(tn->idrinfo); | |
179 | } | |
a159d3c4 | 180 | rtnl_unlock(); |
ddf97ccd WC |
181 | } |
182 | ||
183 | int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb, | |
184 | struct netlink_callback *cb, int type, | |
b3620145 AA |
185 | const struct tc_action_ops *ops, |
186 | struct netlink_ext_ack *extack); | |
65a206c0 | 187 | int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); |
65a206c0 CM |
188 | int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, |
189 | struct tc_action **a, const struct tc_action_ops *ops, | |
e3822678 VB |
190 | int bind, bool cpustats, u32 flags); |
191 | int tcf_idr_create_from_flags(struct tc_action_net *tn, u32 index, | |
192 | struct nlattr *est, struct tc_action **a, | |
193 | const struct tc_action_ops *ops, int bind, | |
194 | u32 flags); | |
1dd7f18f | 195 | void tcf_idr_insert_many(struct tc_action *actions[], int init_res[]); |
0190c1d4 VB |
196 | void tcf_idr_cleanup(struct tc_action_net *tn, u32 index); |
197 | int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index, | |
198 | struct tc_action **a, int bind); | |
b3650bf7 | 199 | int tcf_idr_release(struct tc_action *a, bool bind); |
28e6b67f | 200 | |
ddf97ccd | 201 | int tcf_register_action(struct tc_action_ops *a, struct pernet_operations *ops); |
0b0f43fe JHS |
202 | int tcf_unregister_action(struct tc_action_ops *a, |
203 | struct pernet_operations *ops); | |
90b73b77 | 204 | int tcf_action_destroy(struct tc_action *actions[], int bind); |
22dc13c8 WC |
205 | int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions, |
206 | int nr_actions, struct tcf_result *res); | |
9fb9f251 | 207 | int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla, |
695176bf | 208 | struct nlattr *est, |
87c750e8 | 209 | struct tc_action *actions[], int init_res[], size_t *attr_size, |
c86e0209 | 210 | u32 flags, u32 fl_flags, struct netlink_ext_ack *extack); |
405cd9fc | 211 | struct tc_action_ops *tc_action_load_ops(struct nlattr *nla, u32 flags, |
d349f997 | 212 | struct netlink_ext_ack *extack); |
9fb9f251 JP |
213 | struct tc_action *tcf_action_init_1(struct net *net, struct tcf_proto *tp, |
214 | struct nlattr *nla, struct nlattr *est, | |
87c750e8 | 215 | struct tc_action_ops *a_o, int *init_res, |
695176bf | 216 | u32 flags, struct netlink_ext_ack *extack); |
90b73b77 | 217 | int tcf_action_dump(struct sk_buff *skb, struct tc_action *actions[], int bind, |
ca44b738 | 218 | int ref, bool terse); |
5c15257f JP |
219 | int tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int, int); |
220 | int tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int, int); | |
5e1ad95b VB |
221 | |
222 | static inline void tcf_action_update_bstats(struct tc_action *a, | |
223 | struct sk_buff *skb) | |
224 | { | |
5e174d5e | 225 | if (likely(a->cpu_bstats)) { |
50dc9a85 | 226 | bstats_update(this_cpu_ptr(a->cpu_bstats), skb); |
5e174d5e VB |
227 | return; |
228 | } | |
229 | spin_lock(&a->tcfa_lock); | |
230 | bstats_update(&a->tcfa_bstats, skb); | |
231 | spin_unlock(&a->tcfa_lock); | |
26b537a8 VB |
232 | } |
233 | ||
234 | static inline void tcf_action_inc_drop_qstats(struct tc_action *a) | |
235 | { | |
5e174d5e VB |
236 | if (likely(a->cpu_qstats)) { |
237 | qstats_drop_inc(this_cpu_ptr(a->cpu_qstats)); | |
238 | return; | |
239 | } | |
240 | spin_lock(&a->tcfa_lock); | |
241 | qstats_drop_inc(&a->tcfa_qstats); | |
242 | spin_unlock(&a->tcfa_lock); | |
26b537a8 VB |
243 | } |
244 | ||
245 | static inline void tcf_action_inc_overlimit_qstats(struct tc_action *a) | |
246 | { | |
5e174d5e VB |
247 | if (likely(a->cpu_qstats)) { |
248 | qstats_overlimit_inc(this_cpu_ptr(a->cpu_qstats)); | |
249 | return; | |
250 | } | |
251 | spin_lock(&a->tcfa_lock); | |
252 | qstats_overlimit_inc(&a->tcfa_qstats); | |
253 | spin_unlock(&a->tcfa_lock); | |
26b537a8 VB |
254 | } |
255 | ||
4b61d3e8 PL |
256 | void tcf_action_update_stats(struct tc_action *a, u64 bytes, u64 packets, |
257 | u64 drops, bool hw); | |
5c15257f | 258 | int tcf_action_copy_stats(struct sk_buff *, struct tc_action *, int); |
00175aec | 259 | |
c7a66f8d | 260 | int tcf_action_update_hw_stats(struct tc_action *action); |
13926d19 BZ |
261 | int tcf_action_reoffload_cb(flow_indr_block_bind_cb_t *cb, |
262 | void *cb_priv, bool add); | |
85d0966f DC |
263 | int tcf_action_check_ctrlact(int action, struct tcf_proto *tp, |
264 | struct tcf_chain **handle, | |
265 | struct netlink_ext_ack *newchain); | |
266 | struct tcf_chain *tcf_action_set_ctrlact(struct tc_action *a, int action, | |
267 | struct tcf_chain *newchain); | |
c129412f | 268 | |
269 | #ifdef CONFIG_INET | |
270 | DECLARE_STATIC_KEY_FALSE(tcf_frag_xmit_count); | |
271 | #endif | |
272 | ||
273 | int tcf_dev_queue_xmit(struct sk_buff *skb, int (*xmit)(struct sk_buff *skb)); | |
13926d19 BZ |
274 | |
275 | #else /* !CONFIG_NET_CLS_ACT */ | |
276 | ||
277 | static inline int tcf_action_reoffload_cb(flow_indr_block_bind_cb_t *cb, | |
278 | void *cb_priv, bool add) { | |
279 | return 0; | |
280 | } | |
281 | ||
2734437e | 282 | #endif /* CONFIG_NET_CLS_ACT */ |
86cb13e4 | 283 | |
38040702 | 284 | static inline void tcf_action_stats_update(struct tc_action *a, u64 bytes, |
4b61d3e8 PL |
285 | u64 packets, u64 drops, |
286 | u64 lastuse, bool hw) | |
38040702 | 287 | { |
2734437e | 288 | #ifdef CONFIG_NET_CLS_ACT |
38040702 AV |
289 | if (!a->ops->stats_update) |
290 | return; | |
291 | ||
4b61d3e8 | 292 | a->ops->stats_update(a, bytes, packets, drops, lastuse, hw); |
2734437e | 293 | #endif |
38040702 AV |
294 | } |
295 | ||
b3f55bdd | 296 | |
1da177e4 | 297 | #endif |