6ff1aeb64d
This folder in the SysFS code represents everything related to /sys/dev, which is a directory meant to be a convenient interface to track all IDs of all block and character devices (ID = major:minor numbers).
51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
/*
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* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/SysFS/Registry.h>
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#include <Kernel/FileSystem/SysFS/Subsystems/DeviceIdentifiers/BlockDevicesDirectory.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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NonnullRefPtr<SysFSBlockDevicesDirectory> SysFSBlockDevicesDirectory::must_create(SysFSDeviceIdentifiersDirectory const& devices_directory)
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{
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return adopt_ref_if_nonnull(new SysFSBlockDevicesDirectory(devices_directory)).release_nonnull();
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}
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SysFSBlockDevicesDirectory::SysFSBlockDevicesDirectory(SysFSDeviceIdentifiersDirectory const& devices_directory)
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: SysFSDirectory(devices_directory)
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{
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}
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ErrorOr<void> SysFSBlockDevicesDirectory::traverse_as_directory(FileSystemID fsid, Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)> callback) const
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{
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VERIFY(m_parent_directory);
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TRY(callback({ "."sv, { fsid, component_index() }, 0 }));
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TRY(callback({ ".."sv, { fsid, m_parent_directory->component_index() }, 0 }));
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return SysFSComponentRegistry::the().devices_list().with_exclusive([&](auto& list) -> ErrorOr<void> {
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for (auto& exposed_device : list) {
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if (!exposed_device.is_block_device())
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continue;
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TRY(callback({ exposed_device.name(), { fsid, exposed_device.component_index() }, 0 }));
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}
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return {};
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});
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}
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RefPtr<SysFSComponent> SysFSBlockDevicesDirectory::lookup(StringView name)
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{
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return SysFSComponentRegistry::the().devices_list().with_exclusive([&](auto& list) -> RefPtr<SysFSComponent> {
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for (auto& exposed_device : list) {
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if (!exposed_device.is_block_device())
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continue;
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if (exposed_device.name() == name)
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return exposed_device;
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}
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return nullptr;
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});
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}
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}
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