xref: /linux/tools/testing/selftests/bpf/progs/cgroup_preorder.c (revision 4f9786035f9e519db41375818e1d0b5f20da2f10) 
1*2222aa1cSYonghong Song // SPDX-License-Identifier: GPL-2.0
2*2222aa1cSYonghong Song /* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
3*2222aa1cSYonghong Song #include <vmlinux.h>
4*2222aa1cSYonghong Song #include <bpf/bpf_helpers.h>
5*2222aa1cSYonghong Song 
6*2222aa1cSYonghong Song char _license[] SEC("license") = "GPL";
7*2222aa1cSYonghong Song 
8*2222aa1cSYonghong Song unsigned int idx;
9*2222aa1cSYonghong Song __u8 result[4];
10*2222aa1cSYonghong Song 
11*2222aa1cSYonghong Song SEC("cgroup/getsockopt")
child(struct bpf_sockopt * ctx)12*2222aa1cSYonghong Song int child(struct bpf_sockopt *ctx)
13*2222aa1cSYonghong Song {
14*2222aa1cSYonghong Song 	if (idx < 4)
15*2222aa1cSYonghong Song 		result[idx++] = 1;
16*2222aa1cSYonghong Song 	return 1;
17*2222aa1cSYonghong Song }
18*2222aa1cSYonghong Song 
19*2222aa1cSYonghong Song SEC("cgroup/getsockopt")
child_2(struct bpf_sockopt * ctx)20*2222aa1cSYonghong Song int child_2(struct bpf_sockopt *ctx)
21*2222aa1cSYonghong Song {
22*2222aa1cSYonghong Song 	if (idx < 4)
23*2222aa1cSYonghong Song 		result[idx++] = 2;
24*2222aa1cSYonghong Song 	return 1;
25*2222aa1cSYonghong Song }
26*2222aa1cSYonghong Song 
27*2222aa1cSYonghong Song SEC("cgroup/getsockopt")
parent(struct bpf_sockopt * ctx)28*2222aa1cSYonghong Song int parent(struct bpf_sockopt *ctx)
29*2222aa1cSYonghong Song {
30*2222aa1cSYonghong Song 	if (idx < 4)
31*2222aa1cSYonghong Song 		result[idx++] = 3;
32*2222aa1cSYonghong Song 	return 1;
33*2222aa1cSYonghong Song }
34*2222aa1cSYonghong Song 
35*2222aa1cSYonghong Song SEC("cgroup/getsockopt")
parent_2(struct bpf_sockopt * ctx)36*2222aa1cSYonghong Song int parent_2(struct bpf_sockopt *ctx)
37*2222aa1cSYonghong Song {
38*2222aa1cSYonghong Song 	if (idx < 4)
39*2222aa1cSYonghong Song 		result[idx++] = 4;
40*2222aa1cSYonghong Song 	return 1;
41*2222aa1cSYonghong Song }
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