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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/token_lsm.c
Extension
.c
Size
703 bytes
Lines
33
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) 2024 Meta Platforms, Inc. and affiliates. */

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

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

int my_pid;
int reject_capable;
int reject_cmd;

SEC("lsm/bpf_token_capable")
int BPF_PROG(token_capable, struct bpf_token *token, int cap)
{
	if (my_pid == 0 || my_pid != (bpf_get_current_pid_tgid() >> 32))
		return 0;
	if (reject_capable)
		return -1;
	return 0;
}

SEC("lsm/bpf_token_cmd")
int BPF_PROG(token_cmd, struct bpf_token *token, enum bpf_cmd cmd)
{
	if (my_pid == 0 || my_pid != (bpf_get_current_pid_tgid() >> 32))
		return 0;
	if (reject_cmd)
		return -1;
	return 0;
}

Annotation

Implementation Notes