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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_TC_WRAPPER_H
3#define __NET_TC_WRAPPER_H
4
5#include <net/pkt_cls.h>
6
7#if IS_ENABLED(CONFIG_MITIGATION_RETPOLINE)
8
9#include <linux/cpufeature.h>
10#include <linux/static_key.h>
11#include <linux/indirect_call_wrapper.h>
12
13#define TC_INDIRECT_SCOPE
14
15extern struct static_key_false tc_skip_wrapper;
16
17/* TC Actions */
18#ifdef CONFIG_NET_CLS_ACT
19
20#define TC_INDIRECT_ACTION_DECLARE(fname) \
21 INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
22 const struct tc_action *a, \
23 struct tcf_result *res))
24
25TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act);
26TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act);
27TC_INDIRECT_ACTION_DECLARE(tcf_csum_act);
28TC_INDIRECT_ACTION_DECLARE(tcf_ct_act);
29TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act);
30TC_INDIRECT_ACTION_DECLARE(tcf_gact_act);
31TC_INDIRECT_ACTION_DECLARE(tcf_gate_act);
32TC_INDIRECT_ACTION_DECLARE(tcf_ife_act);
33TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act);
34TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act);
35TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act);
36TC_INDIRECT_ACTION_DECLARE(tcf_nat_act);
37TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act);
38TC_INDIRECT_ACTION_DECLARE(tcf_police_act);
39TC_INDIRECT_ACTION_DECLARE(tcf_sample_act);
40TC_INDIRECT_ACTION_DECLARE(tcf_simp_act);
41TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act);
42TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act);
43TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act);
44TC_INDIRECT_ACTION_DECLARE(tunnel_key_act);
45
46static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
47 struct tcf_result *res)
48{
49 if (static_branch_likely(&tc_skip_wrapper))
50 goto skip;
51
52#if IS_BUILTIN(CONFIG_NET_ACT_GACT)
53 if (a->ops->act == tcf_gact_act)
54 return tcf_gact_act(skb, a, res);
55#endif
56#if IS_BUILTIN(CONFIG_NET_ACT_MIRRED)
57 if (a->ops->act == tcf_mirred_act)
58 return tcf_mirred_act(skb, a, res);
59#endif
60#if IS_BUILTIN(CONFIG_NET_ACT_PEDIT)
61 if (a->ops->act == tcf_pedit_act)
62 return tcf_pedit_act(skb, a, res);
63#endif
64#if IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT)
65 if (a->ops->act == tcf_skbedit_act)
66 return tcf_skbedit_act(skb, a, res);
67#endif
68#if IS_BUILTIN(CONFIG_NET_ACT_SKBMOD)
69 if (a->ops->act == tcf_skbmod_act)
70 return tcf_skbmod_act(skb, a, res);
71#endif
72#if IS_BUILTIN(CONFIG_NET_ACT_POLICE)
73 if (a->ops->act == tcf_police_act)
74 return tcf_police_act(skb, a, res);
75#endif
76#if IS_BUILTIN(CONFIG_NET_ACT_BPF)
77 if (a->ops->act == tcf_bpf_act)
78 return tcf_bpf_act(skb, a, res);
79#endif
80#if IS_BUILTIN(CONFIG_NET_ACT_CONNMARK)
81 if (a->ops->act == tcf_connmark_act)
82 return tcf_connmark_act(skb, a, res);
83#endif
84#if IS_BUILTIN(CONFIG_NET_ACT_CSUM)
85 if (a->ops->act == tcf_csum_act)
86 return tcf_csum_act(skb, a, res);
87#endif
88#if IS_BUILTIN(CONFIG_NET_ACT_CT)
89 if (a->ops->act == tcf_ct_act)
90 return tcf_ct_act(skb, a, res);
91#endif
92#if IS_BUILTIN(CONFIG_NET_ACT_CTINFO)
93 if (a->ops->act == tcf_ctinfo_act)
94 return tcf_ctinfo_act(skb, a, res);
95#endif
96#if IS_BUILTIN(CONFIG_NET_ACT_GATE)
97 if (a->ops->act == tcf_gate_act)
98 return tcf_gate_act(skb, a, res);
99#endif
100#if IS_BUILTIN(CONFIG_NET_ACT_MPLS)
101 if (a->ops->act == tcf_mpls_act)
102 return tcf_mpls_act(skb, a, res);
103#endif
104#if IS_BUILTIN(CONFIG_NET_ACT_NAT)
105 if (a->ops->act == tcf_nat_act)
106 return tcf_nat_act(skb, a, res);
107#endif
108#if IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY)
109 if (a->ops->act == tunnel_key_act)
110 return tunnel_key_act(skb, a, res);
111#endif
112#if IS_BUILTIN(CONFIG_NET_ACT_VLAN)
113 if (a->ops->act == tcf_vlan_act)
114 return tcf_vlan_act(skb, a, res);
115#endif
116#if IS_BUILTIN(CONFIG_NET_ACT_IFE)
117 if (a->ops->act == tcf_ife_act)
118 return tcf_ife_act(skb, a, res);
119#endif
120#if IS_BUILTIN(CONFIG_NET_ACT_SIMP)
121 if (a->ops->act == tcf_simp_act)
122 return tcf_simp_act(skb, a, res);
123#endif
124#if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE)
125 if (a->ops->act == tcf_sample_act)
126 return tcf_sample_act(skb, a, res);
127#endif
128
129skip:
130 return a->ops->act(skb, a, res);
131}
132
133#endif /* CONFIG_NET_CLS_ACT */
134
135/* TC Filters */
136#ifdef CONFIG_NET_CLS
137
138#define TC_INDIRECT_FILTER_DECLARE(fname) \
139 INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
140 const struct tcf_proto *tp, \
141 struct tcf_result *res))
142
143TC_INDIRECT_FILTER_DECLARE(basic_classify);
144TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify);
145TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify);
146TC_INDIRECT_FILTER_DECLARE(fl_classify);
147TC_INDIRECT_FILTER_DECLARE(flow_classify);
148TC_INDIRECT_FILTER_DECLARE(fw_classify);
149TC_INDIRECT_FILTER_DECLARE(mall_classify);
150TC_INDIRECT_FILTER_DECLARE(route4_classify);
151TC_INDIRECT_FILTER_DECLARE(u32_classify);
152
153static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
154 struct tcf_result *res)
155{
156 if (static_branch_likely(&tc_skip_wrapper))
157 goto skip;
158
159#if IS_BUILTIN(CONFIG_NET_CLS_BPF)
160 if (tp->classify == cls_bpf_classify)
161 return cls_bpf_classify(skb, tp, res);
162#endif
163#if IS_BUILTIN(CONFIG_NET_CLS_U32)
164 if (tp->classify == u32_classify)
165 return u32_classify(skb, tp, res);
166#endif
167#if IS_BUILTIN(CONFIG_NET_CLS_FLOWER)
168 if (tp->classify == fl_classify)
169 return fl_classify(skb, tp, res);
170#endif
171#if IS_BUILTIN(CONFIG_NET_CLS_FW)
172 if (tp->classify == fw_classify)
173 return fw_classify(skb, tp, res);
174#endif
175#if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL)
176 if (tp->classify == mall_classify)
177 return mall_classify(skb, tp, res);
178#endif
179#if IS_BUILTIN(CONFIG_NET_CLS_BASIC)
180 if (tp->classify == basic_classify)
181 return basic_classify(skb, tp, res);
182#endif
183#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
184 if (tp->classify == cls_cgroup_classify)
185 return cls_cgroup_classify(skb, tp, res);
186#endif
187#if IS_BUILTIN(CONFIG_NET_CLS_FLOW)
188 if (tp->classify == flow_classify)
189 return flow_classify(skb, tp, res);
190#endif
191#if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4)
192 if (tp->classify == route4_classify)
193 return route4_classify(skb, tp, res);
194#endif
195
196skip:
197 return tp->classify(skb, tp, res);
198}
199
200#endif /* CONFIG_NET_CLS */
201
202static inline void tc_wrapper_init(void)
203{
204#ifdef CONFIG_X86
205 if (!cpu_feature_enabled(X86_FEATURE_RETPOLINE))
206 static_branch_enable(&tc_skip_wrapper);
207#endif
208}
209
210#else
211
212#define TC_INDIRECT_SCOPE static
213
214static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
215 struct tcf_result *res)
216{
217 return a->ops->act(skb, a, res);
218}
219
220static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
221 struct tcf_result *res)
222{
223 return tp->classify(skb, tp, res);
224}
225
226static inline void tc_wrapper_init(void)
227{
228}
229
230#endif
231
232#endif /* __NET_TC_WRAPPER_H */
233

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source code of linux/include/net/tc_wrapper.h