| // SPDX-License-Identifier: GPL-2.0 |
| |
| /* |
| * Copyright (C) 2025 Microsoft Corporation |
| * |
| * Author: Blaise Boscaccy <bboscaccy@linux.microsoft.com> |
| */ |
| |
| #include "vmlinux.h" |
| #include <errno.h> |
| #include <bpf/bpf_helpers.h> |
| #include <bpf/bpf_tracing.h> |
| |
| char _license[] SEC("license") = "GPL"; |
| |
| __u32 monitored_tid; |
| |
| SEC("lsm.s/bpf") |
| int BPF_PROG(bpf, int cmd, union bpf_attr *attr, unsigned int size, bool kernel) |
| { |
| __u32 tid; |
| |
| tid = bpf_get_current_pid_tgid() & 0xFFFFFFFF; |
| if (!kernel || tid != monitored_tid) |
| return 0; |
| else |
| return -EINVAL; |
| } |
