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Kernel/SysFS: Add /sys/devices/storage directory

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This change in fact does the following:
1. Use support for symlinks between /sys/dev/block/ storage device
identifier nodes and devices in /sys/devices/storage/{LUN}.
2. Add basic nodes in a /sys/devices/storage/{LUN} directory, to let
userspace to know about the device and its details.
This commit is contained in:
Liav A 2022-04-23 11:48:40 +03:00 • committed by Andreas Kling
parent 22335e53e0
commit 1dbd32488f
19 changed files with 450 additions and 1 deletions
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39
Kernel/FileSystem/SysFS/Subsystems/Devices/Storage/DeviceAttribute.h Normal file
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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/FileSystem/SysFS/Component.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Storage/DeviceDirectory.h>
#include <Kernel/KBuffer.h>
namespace Kernel {
class StorageDeviceAttributeSysFSComponent : public SysFSComponent {
public:
enum class Type {
EndLBA,
SectorSize,
CommandSet,
InterfaceType,
};
public:
static NonnullRefPtr<StorageDeviceAttributeSysFSComponent> must_create(StorageDeviceSysFSDirectory const& device_directory, Type);
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const override;
virtual ~StorageDeviceAttributeSysFSComponent() {};
virtual StringView name() const override;
protected:
ErrorOr<NonnullOwnPtr<KBuffer>> try_to_generate_buffer() const;
StorageDeviceAttributeSysFSComponent(StorageDeviceSysFSDirectory const& device, Type);
NonnullRefPtr<StorageDevice> m_device;
Type const m_type { Type::EndLBA };
};
}