jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/ByteBuffer.h>
10#include <AK/DistinctNumeric.h>
11#include <AK/Types.h>
12
13namespace Kernel {
14
15class FileSystem;
16struct InodeMetadata;
17
18AK_TYPEDEF_DISTINCT_ORDERED_ID(u32, FileSystemID);
19AK_TYPEDEF_DISTINCT_ORDERED_ID(u64, InodeIndex);
20
21class InodeIdentifier {
22public:
23 InodeIdentifier() = default;
24 InodeIdentifier(FileSystemID fsid, InodeIndex inode)
25 : m_fsid(fsid)
26 , m_index(inode)
27 {
28 }
29
30 bool is_valid() const { return m_fsid != 0 && m_index != 0; }
31
32 FileSystemID fsid() const { return m_fsid; }
33 InodeIndex index() const { return m_index; }
34
35 bool operator==(InodeIdentifier const& other) const
36 {
37 return m_fsid == other.m_fsid && m_index == other.m_index;
38 }
39
40 bool operator!=(InodeIdentifier const& other) const
41 {
42 return m_fsid != other.m_fsid || m_index != other.m_index;
43 }
44
45private:
46 FileSystemID m_fsid { 0 };
47 InodeIndex m_index { 0 };
48};
49
50}
51
52template<>
53struct AK::Formatter<Kernel::InodeIdentifier> : AK::Formatter<FormatString> {
54 ErrorOr<void> format(FormatBuilder& builder, Kernel::InodeIdentifier value)
55 {
56 return AK::Formatter<FormatString>::format(builder, "{}:{}"sv, value.fsid(), value.index());
57 }
58};