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71 lines
1.9 KiB
C++
71 lines
1.9 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/Error.h>
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#include <LibPartition/PartitionTable.h>
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namespace Partition {
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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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#ifdef KERNEL
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static ErrorOr<NonnullOwnPtr<MBRPartitionTable>> try_to_initialize(Kernel::StorageDevice&);
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static OwnPtr<MBRPartitionTable> try_to_initialize(Kernel::StorageDevice&, u32 start_lba);
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explicit MBRPartitionTable(Kernel::StorageDevice&);
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MBRPartitionTable(Kernel::StorageDevice&, u32 start_lba);
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#else
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static ErrorOr<NonnullOwnPtr<MBRPartitionTable>> try_to_initialize(NonnullRefPtr<Core::DeprecatedFile>);
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static OwnPtr<MBRPartitionTable> try_to_initialize(NonnullRefPtr<Core::DeprecatedFile>, u32 start_lba);
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explicit MBRPartitionTable(NonnullRefPtr<Core::DeprecatedFile>);
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MBRPartitionTable(NonnullRefPtr<Core::DeprecatedFile>, u32 start_lba);
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#endif
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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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