summaryrefslogtreecommitdiffstats
path: root/include/net/tc_wrapper.h
blob: ceed2fc089ffa3f183d68959d2c9b4420cd8ccd7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_TC_WRAPPER_H
#define __NET_TC_WRAPPER_H

#include <net/pkt_cls.h>

#if IS_ENABLED(CONFIG_RETPOLINE)

#include <linux/cpufeature.h>
#include <linux/static_key.h>
#include <linux/indirect_call_wrapper.h>

#define TC_INDIRECT_SCOPE

extern struct static_key_false tc_skip_wrapper;

/* TC Actions */
#ifdef CONFIG_NET_CLS_ACT

#define TC_INDIRECT_ACTION_DECLARE(fname)                              \
	INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb,       \
					    const struct tc_action *a, \
					    struct tcf_result *res))

TC_INDIRECT_ACTION_DECLARE(tcf_bpf_act);
TC_INDIRECT_ACTION_DECLARE(tcf_connmark_act);
TC_INDIRECT_ACTION_DECLARE(tcf_csum_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ct_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ctinfo_act);
TC_INDIRECT_ACTION_DECLARE(tcf_gact_act);
TC_INDIRECT_ACTION_DECLARE(tcf_gate_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ife_act);
TC_INDIRECT_ACTION_DECLARE(tcf_ipt_act);
TC_INDIRECT_ACTION_DECLARE(tcf_mirred_act);
TC_INDIRECT_ACTION_DECLARE(tcf_mpls_act);
TC_INDIRECT_ACTION_DECLARE(tcf_nat_act);
TC_INDIRECT_ACTION_DECLARE(tcf_pedit_act);
TC_INDIRECT_ACTION_DECLARE(tcf_police_act);
TC_INDIRECT_ACTION_DECLARE(tcf_sample_act);
TC_INDIRECT_ACTION_DECLARE(tcf_simp_act);
TC_INDIRECT_ACTION_DECLARE(tcf_skbedit_act);
TC_INDIRECT_ACTION_DECLARE(tcf_skbmod_act);
TC_INDIRECT_ACTION_DECLARE(tcf_vlan_act);
TC_INDIRECT_ACTION_DECLARE(tunnel_key_act);

static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
			   struct tcf_result *res)
{
	if (static_branch_likely(&tc_skip_wrapper))
		goto skip;

#if IS_BUILTIN(CONFIG_NET_ACT_GACT)
	if (a->ops->act == tcf_gact_act)
		return tcf_gact_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_MIRRED)
	if (a->ops->act == tcf_mirred_act)
		return tcf_mirred_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_PEDIT)
	if (a->ops->act == tcf_pedit_act)
		return tcf_pedit_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SKBEDIT)
	if (a->ops->act == tcf_skbedit_act)
		return tcf_skbedit_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SKBMOD)
	if (a->ops->act == tcf_skbmod_act)
		return tcf_skbmod_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_POLICE)
	if (a->ops->act == tcf_police_act)
		return tcf_police_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_BPF)
	if (a->ops->act == tcf_bpf_act)
		return tcf_bpf_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CONNMARK)
	if (a->ops->act == tcf_connmark_act)
		return tcf_connmark_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CSUM)
	if (a->ops->act == tcf_csum_act)
		return tcf_csum_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CT)
	if (a->ops->act == tcf_ct_act)
		return tcf_ct_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_CTINFO)
	if (a->ops->act == tcf_ctinfo_act)
		return tcf_ctinfo_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_GATE)
	if (a->ops->act == tcf_gate_act)
		return tcf_gate_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_MPLS)
	if (a->ops->act == tcf_mpls_act)
		return tcf_mpls_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_NAT)
	if (a->ops->act == tcf_nat_act)
		return tcf_nat_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_TUNNEL_KEY)
	if (a->ops->act == tunnel_key_act)
		return tunnel_key_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_VLAN)
	if (a->ops->act == tcf_vlan_act)
		return tcf_vlan_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_IFE)
	if (a->ops->act == tcf_ife_act)
		return tcf_ife_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_IPT)
	if (a->ops->act == tcf_ipt_act)
		return tcf_ipt_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SIMP)
	if (a->ops->act == tcf_simp_act)
		return tcf_simp_act(skb, a, res);
#endif
#if IS_BUILTIN(CONFIG_NET_ACT_SAMPLE)
	if (a->ops->act == tcf_sample_act)
		return tcf_sample_act(skb, a, res);
#endif

skip:
	return a->ops->act(skb, a, res);
}

#endif /* CONFIG_NET_CLS_ACT */

/* TC Filters */
#ifdef CONFIG_NET_CLS

#define TC_INDIRECT_FILTER_DECLARE(fname)                               \
	INDIRECT_CALLABLE_DECLARE(int fname(struct sk_buff *skb,        \
					    const struct tcf_proto *tp, \
					    struct tcf_result *res))

TC_INDIRECT_FILTER_DECLARE(basic_classify);
TC_INDIRECT_FILTER_DECLARE(cls_bpf_classify);
TC_INDIRECT_FILTER_DECLARE(cls_cgroup_classify);
TC_INDIRECT_FILTER_DECLARE(fl_classify);
TC_INDIRECT_FILTER_DECLARE(flow_classify);
TC_INDIRECT_FILTER_DECLARE(fw_classify);
TC_INDIRECT_FILTER_DECLARE(mall_classify);
TC_INDIRECT_FILTER_DECLARE(route4_classify);
TC_INDIRECT_FILTER_DECLARE(rsvp_classify);
TC_INDIRECT_FILTER_DECLARE(rsvp6_classify);
TC_INDIRECT_FILTER_DECLARE(tcindex_classify);
TC_INDIRECT_FILTER_DECLARE(u32_classify);

static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
				struct tcf_result *res)
{
	if (static_branch_likely(&tc_skip_wrapper))
		goto skip;

#if IS_BUILTIN(CONFIG_NET_CLS_BPF)
	if (tp->classify == cls_bpf_classify)
		return cls_bpf_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_U32)
	if (tp->classify == u32_classify)
		return u32_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_FLOWER)
	if (tp->classify == fl_classify)
		return fl_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_FW)
	if (tp->classify == fw_classify)
		return fw_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_MATCHALL)
	if (tp->classify == mall_classify)
		return mall_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_BASIC)
	if (tp->classify == basic_classify)
		return basic_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
	if (tp->classify == cls_cgroup_classify)
		return cls_cgroup_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_FLOW)
	if (tp->classify == flow_classify)
		return flow_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_ROUTE4)
	if (tp->classify == route4_classify)
		return route4_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_RSVP)
	if (tp->classify == rsvp_classify)
		return rsvp_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_RSVP6)
	if (tp->classify == rsvp6_classify)
		return rsvp6_classify(skb, tp, res);
#endif
#if IS_BUILTIN(CONFIG_NET_CLS_TCINDEX)
	if (tp->classify == tcindex_classify)
		return tcindex_classify(skb, tp, res);
#endif

skip:
	return tp->classify(skb, tp, res);
}

static inline void tc_wrapper_init(void)
{
#ifdef CONFIG_X86
	if (!cpu_feature_enabled(X86_FEATURE_RETPOLINE))
		static_branch_enable(&tc_skip_wrapper);
#endif
}

#endif /* CONFIG_NET_CLS */

#else

#define TC_INDIRECT_SCOPE static

static inline int tc_act(struct sk_buff *skb, const struct tc_action *a,
			   struct tcf_result *res)
{
	return a->ops->act(skb, a, res);
}

static inline int tc_classify(struct sk_buff *skb, const struct tcf_proto *tp,
				struct tcf_result *res)
{
	return tp->classify(skb, tp, res);
}

static inline void tc_wrapper_init(void)
{
}

#endif

#endif /* __NET_TC_WRAPPER_H */