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[linux.git] / tools / testing / selftests / bpf / progs / token_lsm.c
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
8 char _license[] SEC("license") = "GPL";
9
10 int my_pid;
11 int reject_capable;
12 int reject_cmd;
13
14 SEC("lsm/bpf_token_capable")
15 int 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
24 SEC("lsm/bpf_token_cmd")
25 int 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 }
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