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 <Kernel/FileSystem/ISO9660FS/FileSystem.h>
10#include <Kernel/FileSystem/Inode.h>
11
12namespace Kernel {
13
14class ISO9660Inode final : public Inode {
15 friend ISO9660FS;
16
17public:
18 virtual ~ISO9660Inode() override;
19
20 ISO9660FS& fs() { return static_cast<ISO9660FS&>(Inode::fs()); }
21 ISO9660FS const& fs() const { return static_cast<ISO9660FS const&>(Inode::fs()); }
22
23 // ^Inode
24 virtual InodeMetadata metadata() const override;
25 virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
26 virtual ErrorOr<NonnullRefPtr<Inode>> lookup(StringView name) override;
27 virtual ErrorOr<void> flush_metadata() override;
28 virtual ErrorOr<NonnullRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
29 virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override;
30 virtual ErrorOr<void> remove_child(StringView name) override;
31 virtual ErrorOr<void> replace_child(StringView name, Inode& child) override;
32 virtual ErrorOr<void> chmod(mode_t) override;
33 virtual ErrorOr<void> chown(UserID, GroupID) override;
34 virtual ErrorOr<void> truncate(u64) override;
35 virtual ErrorOr<void> update_timestamps(Optional<Time> atime, Optional<Time> ctime, Optional<Time> mtime) override;
36
37private:
38 // HACK: The base ISO 9660 standard says the maximum filename length is 37
39 // bytes large; however, we can read filenames longer than that right now
40 // without any problems, so let's allow it anyway.
41 static constexpr size_t max_file_identifier_length = 256 - sizeof(ISO::DirectoryRecordHeader);
42
43 // ^Inode
44 virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
45 virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& buffer, OpenFileDescription*) override;
46
47 ISO9660Inode(ISO9660FS&, ISO::DirectoryRecordHeader const& record, StringView name);
48 static ErrorOr<NonnullRefPtr<ISO9660Inode>> try_create_from_directory_record(ISO9660FS&, ISO::DirectoryRecordHeader const& record, StringView name);
49
50 static InodeIndex get_inode_index(ISO::DirectoryRecordHeader const& record, StringView name);
51 static StringView get_normalized_filename(ISO::DirectoryRecordHeader const& record, Bytes buffer);
52
53 void create_metadata();
54 time_t parse_numerical_date_time(ISO::NumericalDateAndTime const&);
55
56 InodeMetadata m_metadata;
57 ISO::DirectoryRecordHeader m_record;
58};
59
60}
61
62using Kernel::ISO::has_any_flag;
63using Kernel::ISO::has_flag;