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/*
* Copyright (c) 2022, Undefine <undefine@undefine.pl>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <Kernel/FileSystem/FATFS/Definitions.h>
#include <Kernel/FileSystem/FATFS/FileSystem.h>
#include <Kernel/FileSystem/Inode.h>
#include <Kernel/KBuffer.h>
#include <Kernel/KString.h>
namespace Kernel {
class FATInode final : public Inode {
friend FATFS;
public:
virtual ~FATInode() override = default;
static ErrorOr<NonnullLockRefPtr<FATInode>> create(FATFS&, FATEntry, Vector<FATLongFileNameEntry> const& = {});
FATFS& fs() { return static_cast<FATFS&>(Inode::fs()); }
FATFS const& fs() const { return static_cast<FATFS const&>(Inode::fs()); }
private:
FATInode(FATFS&, FATEntry, NonnullOwnPtr<KString> filename);
static constexpr u32 no_more_clusters = 0x0FFFFFF8;
static constexpr u32 cluster_number_mask = 0x0FFFFFFF;
static constexpr u8 end_entry_byte = 0x00;
static constexpr u8 unused_entry_byte = 0xE5;
static constexpr u8 lfn_entry_character_termination = 0x00;
static constexpr u8 lfn_entry_unused_byte = 0xFF;
static constexpr u8 normal_filename_length = 8;
static constexpr u8 normal_extension_length = 3;
static ErrorOr<NonnullOwnPtr<KString>> compute_filename(FATEntry&, Vector<FATLongFileNameEntry> const& = {});
static StringView byte_terminated_string(StringView, u8);
ErrorOr<Vector<BlockBasedFileSystem::BlockIndex>> compute_block_list();
ErrorOr<NonnullOwnPtr<KBuffer>> read_block_list();
ErrorOr<LockRefPtr<FATInode>> traverse(Function<ErrorOr<bool>(LockRefPtr<FATInode>)> callback);
u32 first_cluster() const;
// ^Inode
virtual ErrorOr<size_t> write_bytes_locked(off_t, size_t, UserOrKernelBuffer const& data, OpenFileDescription*) override;
virtual ErrorOr<size_t> read_bytes_locked(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
virtual InodeMetadata metadata() const override;
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
virtual ErrorOr<NonnullLockRefPtr<Inode>> lookup(StringView name) override;
virtual ErrorOr<NonnullLockRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override;
virtual ErrorOr<void> remove_child(StringView name) override;
virtual ErrorOr<void> replace_child(StringView name, Inode& child) override;
virtual ErrorOr<void> chmod(mode_t) override;
virtual ErrorOr<void> chown(UserID, GroupID) override;
virtual ErrorOr<void> flush_metadata() override;
Vector<BlockBasedFileSystem::BlockIndex> m_block_list;
FATEntry m_entry;
NonnullOwnPtr<KString> m_filename;
InodeMetadata m_metadata;
};
}
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