LXR linux/tools/lib/bpf/libbpf

   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 */
  60