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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_module_attach.c
Extension
.c
Size
2999 bytes
Lines
128
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) 2020 Facebook */

#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_core_read.h>
#include "../test_kmods/bpf_testmod.h"

__u32 sz = 0;

SEC("?raw_tp/bpf_testmod_test_read")
int BPF_PROG(handle_raw_tp,
	     struct task_struct *task, struct bpf_testmod_test_read_ctx *read_ctx)
{
	sz = BPF_CORE_READ(read_ctx, len);
	return 0;
}

SEC("?raw_tp/bpf_testmod_test_write_bare_tp")
int BPF_PROG(handle_raw_tp_bare,
	     struct task_struct *task, struct bpf_testmod_test_write_ctx *write_ctx)
{
	sz = BPF_CORE_READ(write_ctx, len);
	return 0;
}

int raw_tp_writable_bare_in_val = 0;
int raw_tp_writable_bare_early_ret = 0;
int raw_tp_writable_bare_out_val = 0;

SEC("?raw_tp.w/bpf_testmod_test_writable_bare_tp")
int BPF_PROG(handle_raw_tp_writable_bare,
	     struct bpf_testmod_test_writable_ctx *writable)
{
	raw_tp_writable_bare_in_val = writable->val;
	writable->early_ret = raw_tp_writable_bare_early_ret;
	writable->val = raw_tp_writable_bare_out_val;
	return 0;
}

SEC("?tp_btf/bpf_testmod_test_read")
int BPF_PROG(handle_tp_btf,
	     struct task_struct *task, struct bpf_testmod_test_read_ctx *read_ctx)
{
	sz = read_ctx->len;
	return 0;
}

SEC("?fentry/bpf_testmod_test_read")
int BPF_PROG(handle_fentry,
	     struct file *file, struct kobject *kobj,
	     struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
{
	sz = len;
	return 0;
}

SEC("?fentry")
int BPF_PROG(handle_fentry_manual,
	     struct file *file, struct kobject *kobj,
	     struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
{
	sz = len;
	return 0;
}

SEC("?fentry/bpf_testmod:bpf_testmod_test_read")
int BPF_PROG(handle_fentry_explicit,
	     struct file *file, struct kobject *kobj,
	     struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
{
	sz = len;
	return 0;
}


SEC("?fentry")
int BPF_PROG(handle_fentry_explicit_manual,
	     struct file *file, struct kobject *kobj,
	     struct bin_attribute *bin_attr, char *buf, loff_t off, size_t len)
{
	sz = len;
	return 0;
}

int retval = 0;

SEC("?fexit/bpf_testmod_test_read")
int BPF_PROG(handle_fexit,

Annotation

Implementation Notes