tools/testing/selftests/bpf/progs/test_global_func4.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_global_func4.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_global_func4.c
Extension
.c
Size
855 bytes
Lines
56
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-only
/* Copyright (c) 2020 Facebook */
#include <stddef.h>
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

__attribute__ ((noinline))
int f1(struct __sk_buff *skb)
{
	return skb->len;
}

__attribute__ ((noinline))
int f2(int val, struct __sk_buff *skb)
{
	return f1(skb) + val;
}

__attribute__ ((noinline))
int f3(int val, struct __sk_buff *skb, int var)
{
	return f2(var, skb) + val;
}

__attribute__ ((noinline))
int f4(struct __sk_buff *skb)
{
	return f3(1, skb, 2);
}

__attribute__ ((noinline))
int f5(struct __sk_buff *skb)
{
	return f4(skb);
}

__attribute__ ((noinline))
int f6(struct __sk_buff *skb)
{
	return f5(skb);
}

__attribute__ ((noinline))
int f7(struct __sk_buff *skb)
{
	return f6(skb);
}

SEC("tc")
__success
int global_func4(struct __sk_buff *skb)
{
	return f7(skb);
}

Annotation

Implementation Notes