1/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
 2
 3/*
 4 * Libbpf legacy APIs (either discouraged or deprecated, as mentioned in [0])
 5 *
 6 *   [0] https://docs.google.com/document/d/1UyjTZuPFWiPFyKk1tV5an11_iaRuec6U-ZESZ54nNTY
 7 *
 8 * Copyright (C) 2021 Facebook
 9 */
10#ifndef __LIBBPF_LEGACY_BPF_H
11#define __LIBBPF_LEGACY_BPF_H
12
13#include <linux/bpf.h>
14#include <stdbool.h>
15#include <stddef.h>
16#include <stdint.h>
17#include "libbpf_common.h"
18
19#ifdef __cplusplus
20extern "C" {
21#endif
22
23enum libbpf_strict_mode {
24	/* Turn on all supported strict features of libbpf to simulate libbpf
25	 * v1.0 behavior.
26	 * This will be the default behavior in libbpf v1.0.
27	 */
28	LIBBPF_STRICT_ALL = 0xffffffff,
29
30	/*
31	 * Disable any libbpf 1.0 behaviors. This is the default before libbpf
32	 * v1.0. It won't be supported anymore in v1.0, please update your
33	 * code so that it handles LIBBPF_STRICT_ALL mode before libbpf v1.0.
34	 */
35	LIBBPF_STRICT_NONE = 0x00,
36	/*
37	 * Return NULL pointers on error, not ERR_PTR(err).
38	 * Additionally, libbpf also always sets errno to corresponding Exx
39	 * (positive) error code.
40	 */
41	LIBBPF_STRICT_CLEAN_PTRS = 0x01,
42	/*
43	 * Return actual error codes from low-level APIs directly, not just -1.
44	 * Additionally, libbpf also always sets errno to corresponding Exx
45	 * (positive) error code.
46	 */
47	LIBBPF_STRICT_DIRECT_ERRS = 0x02,
48
49	__LIBBPF_STRICT_LAST,
50};
51
52LIBBPF_API int libbpf_set_strict_mode(enum libbpf_strict_mode mode);
53
54
55#ifdef __cplusplus
56} /* extern "C" */
57#endif
58
59#endif /* __LIBBPF_LEGACY_BPF_H */