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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Debug.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/FileSystem/OpenFileDescription.h>
#include <Kernel/Storage/Partition/DiskPartition.h>
namespace Kernel {
NonnullRefPtr<DiskPartition> DiskPartition::create(BlockDevice& device, unsigned minor_number, DiskPartitionMetadata metadata)
{
auto partition_or_error = DeviceManagement::try_create_device<DiskPartition>(device, minor_number, metadata);
// FIXME: Find a way to propagate errors
VERIFY(!partition_or_error.is_error());
return partition_or_error.release_value();
}
DiskPartition::DiskPartition(BlockDevice& device, unsigned minor_number, DiskPartitionMetadata metadata)
: BlockDevice(100, minor_number, device.block_size())
, m_device(device)
, m_metadata(metadata)
{
}
DiskPartition::~DiskPartition() = default;
DiskPartitionMetadata const& DiskPartition::metadata() const
{
return m_metadata;
}
void DiskPartition::start_request(AsyncBlockDeviceRequest& request)
{
auto device = m_device.strong_ref();
if (!device)
request.complete(AsyncBlockDeviceRequest::RequestResult::Failure);
auto sub_request_or_error = device->try_make_request<AsyncBlockDeviceRequest>(request.request_type(),
request.block_index() + m_metadata.start_block(), request.block_count(), request.buffer(), request.buffer_size());
if (sub_request_or_error.is_error())
TODO();
request.add_sub_request(sub_request_or_error.release_value());
}
ErrorOr<size_t> DiskPartition::read(OpenFileDescription& fd, u64 offset, UserOrKernelBuffer& outbuf, size_t len)
{
u64 adjust = m_metadata.start_block() * block_size();
dbgln_if(OFFD_DEBUG, "DiskPartition::read offset={}, adjust={}, len={}", fd.offset(), adjust, len);
return m_device.strong_ref()->read(fd, offset + adjust, outbuf, len);
}
bool DiskPartition::can_read(OpenFileDescription const& fd, u64 offset) const
{
u64 adjust = m_metadata.start_block() * block_size();
dbgln_if(OFFD_DEBUG, "DiskPartition::can_read offset={}, adjust={}", offset, adjust);
return m_device.strong_ref()->can_read(fd, offset + adjust);
}
ErrorOr<size_t> DiskPartition::write(OpenFileDescription& fd, u64 offset, UserOrKernelBuffer const& inbuf, size_t len)
{
u64 adjust = m_metadata.start_block() * block_size();
dbgln_if(OFFD_DEBUG, "DiskPartition::write offset={}, adjust={}, len={}", offset, adjust, len);
return m_device.strong_ref()->write(fd, offset + adjust, inbuf, len);
}
bool DiskPartition::can_write(OpenFileDescription const& fd, u64 offset) const
{
u64 adjust = m_metadata.start_block() * block_size();
dbgln_if(OFFD_DEBUG, "DiskPartition::can_write offset={}, adjust={}", offset, adjust);
return m_device.strong_ref()->can_write(fd, offset + adjust);
}
StringView DiskPartition::class_name() const
{
return "DiskPartition"sv;
}
}
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