1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2022 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 struct {
11 __uint(type, BPF_MAP_TYPE_CGRP_STORAGE);
12 __uint(map_flags, BPF_F_NO_PREALLOC);
13 __type(key, int);
14 __type(value, long);
15 } map_a SEC(".maps");
16
17 SEC("tp_btf/sys_enter")
18 int BPF_PROG(on_enter, struct pt_regs *regs, long id)
19 {
20 struct task_struct *task;
21
22 task = bpf_get_current_task_btf();
23 (void)bpf_cgrp_storage_get(&map_a, (struct cgroup *)task, 0,
24 BPF_LOCAL_STORAGE_GET_F_CREATE);
25 return 0;
26 }
27
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