jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, sin-ack <sin-ack@protonmail.com>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#pragma once
8
9#include <AK/EnumBits.h>
10#include <AK/Error.h>
11#include <AK/HashMap.h>
12#include <AK/RecursionDecision.h>
13#include <AK/StringView.h>
14#include <AK/Types.h>
15#include <Kernel/FileSystem/BlockBasedFileSystem.h>
16#include <Kernel/FileSystem/ISO9660FS/Definitions.h>
17#include <Kernel/FileSystem/ISO9660FS/DirectoryEntry.h>
18#include <Kernel/FileSystem/Inode.h>
19#include <Kernel/KBuffer.h>
20#include <Kernel/Library/NonnullLockRefPtr.h>
21
22namespace Kernel {
23
24class ISO9660Inode;
25class ISO9660DirectoryIterator;
26
27class ISO9660FS final : public BlockBasedFileSystem {
28 friend ISO9660Inode;
29 friend ISO9660DirectoryIterator;
30
31public:
32 static ErrorOr<NonnullLockRefPtr<FileSystem>> try_create(OpenFileDescription&);
33
34 virtual ~ISO9660FS() override;
35 virtual StringView class_name() const override { return "ISO9660FS"sv; }
36 virtual Inode& root_inode() override;
37
38 virtual unsigned total_block_count() const override;
39 virtual unsigned total_inode_count() const override;
40
41 virtual u8 internal_file_type_to_directory_entry_type(DirectoryEntryView const& entry) const override;
42
43 ErrorOr<NonnullLockRefPtr<ISO9660FSDirectoryEntry>> directory_entry_for_record(Badge<ISO9660DirectoryIterator>, ISO::DirectoryRecordHeader const* record);
44
45private:
46 ISO9660FS(OpenFileDescription&);
47
48 virtual ErrorOr<void> prepare_to_clear_last_mount() override;
49
50 virtual bool is_initialized_while_locked() override;
51 virtual ErrorOr<void> initialize_while_locked() override;
52
53 ErrorOr<void> parse_volume_set();
54 ErrorOr<void> create_root_inode();
55 ErrorOr<void> calculate_inode_count() const;
56
57 u32 calculate_directory_entry_cache_key(ISO::DirectoryRecordHeader const&);
58
59 ErrorOr<void> visit_directory_record(ISO::DirectoryRecordHeader const& record, Function<ErrorOr<RecursionDecision>(ISO::DirectoryRecordHeader const*)> const& visitor) const;
60
61 OwnPtr<ISO::PrimaryVolumeDescriptor> m_primary_volume;
62 RefPtr<ISO9660Inode> m_root_inode;
63
64 mutable u32 m_cached_inode_count { 0 };
65 HashMap<u32, NonnullLockRefPtr<ISO9660FSDirectoryEntry>> m_directory_entry_cache;
66};
67
68}