mirror of
https://github.com/RGBCube/serenity
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872f2a3b90
These changes are arbitrarily divided into multiple commits to make it easier to find potentially introduced bugs with git bisect.Everything:
93 lines
3.4 KiB
C++
93 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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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#include <Kernel/Devices/BlockDevice.h>
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namespace Kernel {
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AsyncBlockDeviceRequest::AsyncBlockDeviceRequest(Device& block_device, RequestType request_type, u32 block_index, u32 block_count, const UserOrKernelBuffer& buffer, size_t buffer_size)
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: AsyncDeviceRequest(block_device)
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, m_block_device(static_cast<BlockDevice&>(block_device))
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, m_request_type(request_type)
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, m_block_index(block_index)
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, m_block_count(block_count)
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, m_buffer(buffer)
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, m_buffer_size(buffer_size)
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{
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}
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void AsyncBlockDeviceRequest::start()
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{
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m_block_device.start_request(*this);
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}
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BlockDevice::~BlockDevice()
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{
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}
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bool BlockDevice::read_block(unsigned index, UserOrKernelBuffer& buffer)
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{
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auto read_request = make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Read, index, 1, buffer, 512);
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switch (read_request->wait().request_result()) {
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case AsyncDeviceRequest::Success:
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return true;
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case AsyncDeviceRequest::Failure:
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dbgln("BlockDevice::read_block({}) IO error", index);
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break;
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case AsyncDeviceRequest::MemoryFault:
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dbgln("BlockDevice::read_block({}) EFAULT", index);
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break;
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case AsyncDeviceRequest::Cancelled:
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dbgln("BlockDevice::read_block({}) cancelled", index);
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break;
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default:
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ASSERT_NOT_REACHED();
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}
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return false;
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}
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bool BlockDevice::write_block(unsigned index, const UserOrKernelBuffer& buffer)
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{
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auto write_request = make_request<AsyncBlockDeviceRequest>(AsyncBlockDeviceRequest::Write, index, 1, buffer, 512);
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switch (write_request->wait().request_result()) {
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case AsyncDeviceRequest::Success:
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return true;
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case AsyncDeviceRequest::Failure:
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dbgln("BlockDevice::write_block({}) IO error", index);
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break;
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case AsyncDeviceRequest::MemoryFault:
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dbgln("BlockDevice::write_block({}) EFAULT", index);
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break;
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case AsyncDeviceRequest::Cancelled:
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dbgln("BlockDevice::write_block({}) cancelled", index);
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break;
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default:
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ASSERT_NOT_REACHED();
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}
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return false;
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}
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}
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