mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 10:25:07 +00:00
5ed3f7c6bf
That code used the old AK::Result container, which leads to overly complicated initialization flow when trying to figure out the correct partition table type. Instead, when using the ErrorOr container the code is much simpler and more understandable.
66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020-2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/ByteBuffer.h>
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#include <AK/Error.h>
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#include <AK/RefPtr.h>
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#include <AK/Result.h>
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#include <AK/Vector.h>
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#include <Kernel/Storage/Partition/PartitionTable.h>
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namespace Kernel {
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class MBRPartitionTable : public PartitionTable {
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public:
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struct [[gnu::packed]] Entry {
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u8 status;
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u8 chs1[3];
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u8 type;
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u8 chs2[3];
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u32 offset;
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u32 length;
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};
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struct [[gnu::packed]] Header {
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u8 code1[218];
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u16 ts_zero;
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u8 ts_drive;
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u8 ts_seconds;
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u8 ts_minutes;
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u8 ts_hours;
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u8 code2[216];
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u32 disk_signature;
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u16 disk_signature_zero;
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Entry entry[4];
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u16 mbr_signature;
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};
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public:
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~MBRPartitionTable();
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static ErrorOr<NonnullOwnPtr<MBRPartitionTable>> try_to_initialize(StorageDevice const&);
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static OwnPtr<MBRPartitionTable> try_to_initialize(StorageDevice const&, u32 start_lba);
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explicit MBRPartitionTable(StorageDevice const&);
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MBRPartitionTable(StorageDevice const&, u32 start_lba);
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bool is_protective_mbr() const;
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bool contains_ebr() const;
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virtual bool is_valid() const override { return m_valid; };
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protected:
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Header const& header() const;
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bool is_header_valid() const { return m_header_valid; };
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private:
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bool read_boot_record();
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bool initialize();
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bool m_valid { false };
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bool m_header_valid { false };
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const u32 m_start_lba;
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ByteBuffer m_cached_header;
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};
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}
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