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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <Kernel/Devices/DiskPartition.h>
28
29// #define OFFD_DEBUG
30
31namespace Kernel {
32
33NonnullRefPtr<DiskPartition> DiskPartition::create(BlockDevice& device, unsigned block_offset, unsigned block_limit)
34{
35 return adopt(*new DiskPartition(device, block_offset, block_limit));
36}
37
38DiskPartition::DiskPartition(BlockDevice& device, unsigned block_offset, unsigned block_limit)
39 : BlockDevice(100, 0, device.block_size())
40 , m_device(device)
41 , m_block_offset(block_offset)
42 , m_block_limit(block_limit)
43{
44}
45
46DiskPartition::~DiskPartition()
47{
48}
49
50bool DiskPartition::read_blocks(unsigned index, u16 count, u8* out)
51{
52#ifdef OFFD_DEBUG
53 klog() << "DiskPartition::read_blocks " << index << " (really: " << (m_block_offset + index) << ") count=" << count;
54#endif
55
56 return m_device->read_blocks(m_block_offset + index, count, out);
57}
58
59bool DiskPartition::write_blocks(unsigned index, u16 count, const u8* data)
60{
61#ifdef OFFD_DEBUG
62 klog() << "DiskPartition::write_blocks " << index << " (really: " << (m_block_offset + index) << ") count=" << count;
63#endif
64
65 return m_device->write_blocks(m_block_offset + index, count, data);
66}
67
68const char* DiskPartition::class_name() const
69{
70 return "DiskPartition";
71}
72
73}