mirror of
https://github.com/RGBCube/serenity
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86 lines
2.9 KiB
C++
86 lines
2.9 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/ByteBuffer.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 Result<NonnullOwnPtr<MBRPartitionTable>, PartitionTable::Error> try_to_initialize(const StorageDevice&);
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static OwnPtr<MBRPartitionTable> try_to_initialize(const StorageDevice&, u32 start_lba);
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explicit MBRPartitionTable(const StorageDevice&);
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MBRPartitionTable(const StorageDevice&, 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 Type type() const override { return Type::MBR; };
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virtual bool is_valid() const override { return m_valid; };
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protected:
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const Header& 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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