| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */ |
| |
| #include "vmlinux.h" |
| #include <bpf/bpf_helpers.h> |
| #include <bpf/bpf_tracing.h> |
| |
| char _license[] SEC("license") = "GPL"; |
| |
| struct { |
| __uint(type, BPF_MAP_TYPE_CGRP_STORAGE); |
| __uint(map_flags, BPF_F_NO_PREALLOC); |
| __type(key, int); |
| __type(value, long); |
| } map_a SEC(".maps"); |
| |
| SEC("tp_btf/sys_enter") |
| int BPF_PROG(on_enter, struct pt_regs *regs, long id) |
| { |
| struct task_struct *task; |
| |
| task = bpf_get_current_task_btf(); |
| (void)bpf_cgrp_storage_get(&map_a, (struct cgroup *)task, 0, |
| BPF_LOCAL_STORAGE_GET_F_CREATE); |
| return 0; |
| } |
