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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/RefPtr.h>
#include <AK/Result.h>
#include <AK/Vector.h>
#include <Kernel/Storage/Partition/PartitionTable.h>
namespace Kernel {
class MBRPartitionTable : public PartitionTable {
public:
struct [[gnu::packed]] Entry
{
u8 status;
u8 chs1[3];
u8 type;
u8 chs2[3];
u32 offset;
u32 length;
};
struct [[gnu::packed]] Header
{
u8 code1[218];
u16 ts_zero;
u8 ts_drive;
u8 ts_seconds;
u8 ts_minutes;
u8 ts_hours;
u8 code2[216];
u32 disk_signature;
u16 disk_signature_zero;
Entry entry[4];
u16 mbr_signature;
};
public:
~MBRPartitionTable();
static Result<NonnullOwnPtr<MBRPartitionTable>, PartitionTable::Error> try_to_initialize(const StorageDevice&);
static OwnPtr<MBRPartitionTable> try_to_initialize(const StorageDevice&, u32 start_lba);
explicit MBRPartitionTable(const StorageDevice&);
MBRPartitionTable(const StorageDevice&, u32 start_lba);
bool is_protective_mbr() const;
bool contains_ebr() const;
virtual Type type() const override { return Type::MBR; };
virtual bool is_valid() const override { return m_valid; };
protected:
const Header& header() const;
bool is_header_valid() const { return m_header_valid; };
private:
bool read_boot_record();
bool initialize();
bool m_valid { false };
bool m_header_valid { false };
const u32 m_start_lba;
ByteBuffer m_cached_header;
size_t m_partitions_count { 0 };
};
}
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