1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2024 Meta Platforms, Inc. and affiliates. */
 3
 4#include "vmlinux.h"
 5#include <bpf/bpf_helpers.h>
 6#include <bpf/bpf_tracing.h>
 7
 8char _license[] SEC("license") = "GPL";
 9
10int my_pid;
11bool reject_capable;
12bool reject_cmd;
13
14SEC("lsm/bpf_token_capable")
15int BPF_PROG(token_capable, struct bpf_token *token, int cap)
16{
17	if (my_pid == 0 || my_pid != (bpf_get_current_pid_tgid() >> 32))
18		return 0;
19	if (reject_capable)
20		return -1;
21	return 0;
22}
23
24SEC("lsm/bpf_token_cmd")
25int BPF_PROG(token_cmd, struct bpf_token *token, enum bpf_cmd cmd)
26{
27	if (my_pid == 0 || my_pid != (bpf_get_current_pid_tgid() >> 32))
28		return 0;
29	if (reject_cmd)
30		return -1;
31	return 0;
32}