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