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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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53
Kernel/FileSystem/SysFS/Subsystems/Devices/Storage/Directory.cpp Normal file
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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/FileSystem/SysFS/RootDirectory.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Directory.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Storage/DeviceDirectory.h>
#include <Kernel/FileSystem/SysFS/Subsystems/Devices/Storage/Directory.h>
#include <Kernel/Sections.h>
#include <Kernel/Storage/StorageDevice.h>
namespace Kernel {
static SysFSStorageDirectory* s_the { nullptr };
UNMAP_AFTER_INIT NonnullRefPtr<SysFSStorageDirectory> SysFSStorageDirectory::must_create(SysFSDevicesDirectory const& parent_directory)
{
auto directory = adopt_ref(*new (nothrow) SysFSStorageDirectory(parent_directory));
s_the = directory;
return directory;
}
SysFSStorageDirectory& SysFSStorageDirectory::the()
{
VERIFY(s_the);
return *s_the;
}
void SysFSStorageDirectory::plug(Badge<StorageDevice>, StorageDeviceSysFSDirectory& new_device_directory)
{
MUST(m_child_components.with([&](auto& list) -> ErrorOr<void> {
list.append(new_device_directory);
auto pointed_component_base_name = MUST(KString::try_create(new_device_directory.name()));
auto pointed_component_relative_path = MUST(new_device_directory.relative_path(move(pointed_component_base_name), 0));
return {};
}));
}
void SysFSStorageDirectory::unplug(Badge<StorageDevice>, SysFSDirectory& removed_device_directory)
{
MUST(m_child_components.with([&](auto& list) -> ErrorOr<void> {
list.remove(removed_device_directory);
return {};
}));
}
UNMAP_AFTER_INIT SysFSStorageDirectory::SysFSStorageDirectory(SysFSDevicesDirectory const& parent_directory)
: SysFSDirectory(parent_directory)
{
}
}