Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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_act;
16extern struct static_key_false tc_skip_wrapper_cls;
17
18/* TC Actions */
19#ifdef CONFIG_NET_CLS_ACT
20
21#define TC_INDIRECT_ACTION_DECLARE(fname) \
22 INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
23 const struct tc_action *a, \
24 struct tcf_result *res))
25
26TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act);
27TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act);
28TC_INDIRECT_ACTION_DECLARE(tcf_csum_act);
29TC_INDIRECT_ACTION_DECLARE(tcf_ct_act);
30TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act);
31TC_INDIRECT_ACTION_DECLARE(tcf_gact_act);
32TC_INDIRECT_ACTION_DECLARE(tcf_gate_act);
33TC_INDIRECT_ACTION_DECLARE(tcf_ife_act);
34TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act);
35TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act);
36TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act);
37TC_INDIRECT_ACTION_DECLARE(tcf_nat_act);
38TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act);
39TC_INDIRECT_ACTION_DECLARE(tcf_police_act);
40TC_INDIRECT_ACTION_DECLARE(tcf_sample_act);
41TC_INDIRECT_ACTION_DECLARE(tcf_simp_act);
42TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act);
43TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act);
44TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act);
45TC_INDIRECT_ACTION_DECLARE(tunnel_key_act);
46
47static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
48 struct tcf_result *res)
49{
50 if (static_branch_likely(&tc_skip_wrapper_act))
51 goto skip;
52
53#if IS_BUILTIN(CONFIG_NET_ACT_GACT)
54 if (a->ops->act == tcf_gact_act)
55 return tcf_gact_act(skb, a, res);
56#endif
57#if IS_BUILTIN(CONFIG_NET_ACT_MIRRED)
58 if (a->ops->act == tcf_mirred_act)
59 return tcf_mirred_act(skb, a, res);
60#endif
61#if IS_BUILTIN(CONFIG_NET_ACT_PEDIT)
62 if (a->ops->act == tcf_pedit_act)
63 return tcf_pedit_act(skb, a, res);
64#endif
65#if IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT)
66 if (a->ops->act == tcf_skbedit_act)
67 return tcf_skbedit_act(skb, a, res);
68#endif
69#if IS_BUILTIN(CONFIG_NET_ACT_SKBMOD)
70 if (a->ops->act == tcf_skbmod_act)
71 return tcf_skbmod_act(skb, a, res);
72#endif
73#if IS_BUILTIN(CONFIG_NET_ACT_POLICE)
74 if (a->ops->act == tcf_police_act)
75 return tcf_police_act(skb, a, res);
76#endif
77#if IS_BUILTIN(CONFIG_NET_ACT_BPF)
78 if (a->ops->act == tcf_bpf_act)
79 return tcf_bpf_act(skb, a, res);
80#endif
81#if IS_BUILTIN(CONFIG_NET_ACT_CONNMARK)
82 if (a->ops->act == tcf_connmark_act)
83 return tcf_connmark_act(skb, a, res);
84#endif
85#if IS_BUILTIN(CONFIG_NET_ACT_CSUM)
86 if (a->ops->act == tcf_csum_act)
87 return tcf_csum_act(skb, a, res);
88#endif
89#if IS_BUILTIN(CONFIG_NET_ACT_CT)
90 if (a->ops->act == tcf_ct_act)
91 return tcf_ct_act(skb, a, res);
92#endif
93#if IS_BUILTIN(CONFIG_NET_ACT_CTINFO)
94 if (a->ops->act == tcf_ctinfo_act)
95 return tcf_ctinfo_act(skb, a, res);
96#endif
97#if IS_BUILTIN(CONFIG_NET_ACT_GATE)
98 if (a->ops->act == tcf_gate_act)
99 return tcf_gate_act(skb, a, res);
100#endif
101#if IS_BUILTIN(CONFIG_NET_ACT_MPLS)
102 if (a->ops->act == tcf_mpls_act)
103 return tcf_mpls_act(skb, a, res);
104#endif
105#if IS_BUILTIN(CONFIG_NET_ACT_NAT)
106 if (a->ops->act == tcf_nat_act)
107 return tcf_nat_act(skb, a, res);
108#endif
109#if IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY)
110 if (a->ops->act == tunnel_key_act)
111 return tunnel_key_act(skb, a, res);
112#endif
113#if IS_BUILTIN(CONFIG_NET_ACT_VLAN)
114 if (a->ops->act == tcf_vlan_act)
115 return tcf_vlan_act(skb, a, res);
116#endif
117#if IS_BUILTIN(CONFIG_NET_ACT_IFE)
118 if (a->ops->act == tcf_ife_act)
119 return tcf_ife_act(skb, a, res);
120#endif
121#if IS_BUILTIN(CONFIG_NET_ACT_SIMP)
122 if (a->ops->act == tcf_simp_act)
123 return tcf_simp_act(skb, a, res);
124#endif
125#if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE)
126 if (a->ops->act == tcf_sample_act)
127 return tcf_sample_act(skb, a, res);
128#endif
129
130skip:
131 return a->ops->act(skb, a, res);
132}
133
134#endif /* CONFIG_NET_CLS_ACT */
135
136/* TC Filters */
137#ifdef CONFIG_NET_CLS
138
139#define TC_INDIRECT_FILTER_DECLARE(fname) \
140 INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb, \
141 const struct tcf_proto *tp, \
142 struct tcf_result *res))
143
144TC_INDIRECT_FILTER_DECLARE(basic_classify);
145TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify);
146TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify);
147TC_INDIRECT_FILTER_DECLARE(fl_classify);
148TC_INDIRECT_FILTER_DECLARE(flow_classify);
149TC_INDIRECT_FILTER_DECLARE(fw_classify);
150TC_INDIRECT_FILTER_DECLARE(mall_classify);
151TC_INDIRECT_FILTER_DECLARE(route4_classify);
152TC_INDIRECT_FILTER_DECLARE(u32_classify);
153
154static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
155 struct tcf_result *res)
156{
157 if (static_branch_likely(&tc_skip_wrapper_cls))
158 goto skip;
159
160#if IS_BUILTIN(CONFIG_NET_CLS_BPF)
161 if (tp->classify == cls_bpf_classify)
162 return cls_bpf_classify(skb, tp, res);
163#endif
164#if IS_BUILTIN(CONFIG_NET_CLS_U32)
165 if (tp->classify == u32_classify)
166 return u32_classify(skb, tp, res);
167#endif
168#if IS_BUILTIN(CONFIG_NET_CLS_FLOWER)
169 if (tp->classify == fl_classify)
170 return fl_classify(skb, tp, res);
171#endif
172#if IS_BUILTIN(CONFIG_NET_CLS_FW)
173 if (tp->classify == fw_classify)
174 return fw_classify(skb, tp, res);
175#endif
176#if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL)
177 if (tp->classify == mall_classify)
178 return mall_classify(skb, tp, res);
179#endif
180#if IS_BUILTIN(CONFIG_NET_CLS_BASIC)
181 if (tp->classify == basic_classify)
182 return basic_classify(skb, tp, res);
183#endif
184#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
185 if (tp->classify == cls_cgroup_classify)
186 return cls_cgroup_classify(skb, tp, res);
187#endif
188#if IS_BUILTIN(CONFIG_NET_CLS_FLOW)
189 if (tp->classify == flow_classify)
190 return flow_classify(skb, tp, res);
191#endif
192#if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4)
193 if (tp->classify == route4_classify)
194 return route4_classify(skb, tp, res);
195#endif
196
197skip:
198 return tp->classify(skb, tp, res);
199}
200
201#endif /* CONFIG_NET_CLS */
202
203static inline void tc_wrapper_init(void)
204{
205#ifdef CONFIG_X86
206 int cnt_cls = IS_BUILTIN(CONFIG_NET_CLS_BPF) +
207 IS_BUILTIN(CONFIG_NET_CLS_U32) +
208 IS_BUILTIN(CONFIG_NET_CLS_FLOWER) +
209 IS_BUILTIN(CONFIG_NET_CLS_FW) +
210 IS_BUILTIN(CONFIG_NET_CLS_MATCHALL) +
211 IS_BUILTIN(CONFIG_NET_CLS_BASIC) +
212 IS_BUILTIN(CONFIG_NET_CLS_CGROUP) +
213 IS_BUILTIN(CONFIG_NET_CLS_FLOW) +
214 IS_BUILTIN(CONFIG_NET_CLS_ROUTE4);
215
216 int cnt_act = IS_BUILTIN(CONFIG_NET_ACT_GACT) +
217 IS_BUILTIN(CONFIG_NET_ACT_MIRRED) +
218 IS_BUILTIN(CONFIG_NET_ACT_PEDIT) +
219 IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT) +
220 IS_BUILTIN(CONFIG_NET_ACT_SKBMOD) +
221 IS_BUILTIN(CONFIG_NET_ACT_POLICE) +
222 IS_BUILTIN(CONFIG_NET_ACT_BPF) +
223 IS_BUILTIN(CONFIG_NET_ACT_CONNMARK) +
224 IS_BUILTIN(CONFIG_NET_ACT_CSUM) +
225 IS_BUILTIN(CONFIG_NET_ACT_CT) +
226 IS_BUILTIN(CONFIG_NET_ACT_CTINFO) +
227 IS_BUILTIN(CONFIG_NET_ACT_GATE) +
228 IS_BUILTIN(CONFIG_NET_ACT_MPLS) +
229 IS_BUILTIN(CONFIG_NET_ACT_NAT) +
230 IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY) +
231 IS_BUILTIN(CONFIG_NET_ACT_VLAN) +
232 IS_BUILTIN(CONFIG_NET_ACT_IFE) +
233 IS_BUILTIN(CONFIG_NET_ACT_SIMP) +
234 IS_BUILTIN(CONFIG_NET_ACT_SAMPLE);
235
236 if (cpu_feature_enabled(X86_FEATURE_RETPOLINE))
237 return;
238
239 if (cnt_cls > 1)
240 static_branch_enable(&tc_skip_wrapper_cls);
241
242 if (cnt_act > 1)
243 static_branch_enable(&tc_skip_wrapper_act);
244#endif
245}
246
247#else
248
249#define TC_INDIRECT_SCOPE static
250
251static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
252 struct tcf_result *res)
253{
254 return a->ops->act(skb, a, res);
255}
256
257static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
258 struct tcf_result *res)
259{
260 return tp->classify(skb, tp, res);
261}
262
263static inline void tc_wrapper_init(void)
264{
265}
266
267#endif
268
269#endif /* __NET_TC_WRAPPER_H */