nested_trust_success.c

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */
 3
 4#include <vmlinux.h>
 5#include <bpf/bpf_tracing.h>
 6#include <bpf/bpf_helpers.h>
 7#include "bpf_misc.h"
 8
 9#include "nested_trust_common.h"
10
11char _license[] SEC("license") = "GPL";
12
13struct {
14	__uint(type, BPF_MAP_TYPE_SK_STORAGE);
15	__uint(map_flags, BPF_F_NO_PREALLOC);
16	__type(key, int);
17	__type(value, u64);
18} sk_storage_map SEC(".maps");
19
20SEC("tp_btf/task_newtask")
21__success
22int BPF_PROG(test_read_cpumask, struct task_struct *task, u64 clone_flags)
23{
24	bpf_cpumask_test_cpu(0, task->cpus_ptr);
25	return 0;
26}
27
28SEC("tp_btf/tcp_probe")
29__success
30int BPF_PROG(test_skb_field, struct sock *sk, struct sk_buff *skb)
31{
32	bpf_sk_storage_get(&sk_storage_map, skb->sk, 0, 0);
33	return 0;
34}
35
36SEC("tp_btf/task_newtask")
37__success
38int BPF_PROG(test_nested_offset, struct task_struct *task, u64 clone_flags)
39{
40	bpf_cpumask_first_zero(&task->cpus_mask);
41	return 0;
42}