tools/testing/selftests/bpf/progs/cgroup_preorder.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/cgroup_preorder.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/cgroup_preorder.c
Extension
.c
Size
674 bytes
Lines
42
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>

char _license[] SEC("license") = "GPL";

unsigned int idx;
__u8 result[4];

SEC("cgroup/getsockopt")
int child(struct bpf_sockopt *ctx)
{
	if (idx < 4)
		result[idx++] = 1;
	return 1;
}

SEC("cgroup/getsockopt")
int child_2(struct bpf_sockopt *ctx)
{
	if (idx < 4)
		result[idx++] = 2;
	return 1;
}

SEC("cgroup/getsockopt")
int parent(struct bpf_sockopt *ctx)
{
	if (idx < 4)
		result[idx++] = 3;
	return 1;
}

SEC("cgroup/getsockopt")
int parent_2(struct bpf_sockopt *ctx)
{
	if (idx < 4)
		result[idx++] = 4;
	return 1;
}

Annotation

Implementation Notes