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70afa0b171
This enforces us to remove duplicated code across the SysFS code. This results in great simplification of how the SysFS works now, because we enforce one way to treat SysFSDirectory objects.
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
/*
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* Copyright (c) 2021, 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/Bus/USB/BusDirectory.h>
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#include <Kernel/KBufferBuilder.h>
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namespace Kernel {
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static SysFSUSBBusDirectory* s_procfs_usb_bus_directory;
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RefPtr<SysFSUSBDeviceInformation> SysFSUSBBusDirectory::device_node_for(USB::Device& device)
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{
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RefPtr<USB::Device> checked_device = device;
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for (auto& device_node : m_device_nodes) {
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if (device_node.device().ptr() == checked_device.ptr())
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return device_node;
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}
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return {};
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}
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void SysFSUSBBusDirectory::plug(USB::Device& new_device)
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{
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SpinlockLocker lock(m_lock);
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auto device_node = device_node_for(new_device);
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VERIFY(!device_node);
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auto sysfs_usb_device_or_error = SysFSUSBDeviceInformation::create(new_device);
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if (sysfs_usb_device_or_error.is_error()) {
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dbgln("Failed to create SysFSUSBDevice for device id {}", new_device.address());
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return;
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}
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m_device_nodes.append(sysfs_usb_device_or_error.release_value());
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}
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void SysFSUSBBusDirectory::unplug(USB::Device& deleted_device)
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{
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SpinlockLocker lock(m_lock);
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auto device_node = device_node_for(deleted_device);
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VERIFY(device_node);
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device_node->m_list_node.remove();
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}
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SysFSUSBBusDirectory& SysFSUSBBusDirectory::the()
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{
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VERIFY(s_procfs_usb_bus_directory);
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return *s_procfs_usb_bus_directory;
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}
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UNMAP_AFTER_INIT SysFSUSBBusDirectory::SysFSUSBBusDirectory(SysFSBusDirectory& buses_directory)
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: SysFSDirectory(buses_directory)
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{
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}
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UNMAP_AFTER_INIT void SysFSUSBBusDirectory::initialize()
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{
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auto directory = adopt_ref(*new SysFSUSBBusDirectory(SysFSComponentRegistry::the().buses_directory()));
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SysFSComponentRegistry::the().register_new_bus_directory(directory);
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s_procfs_usb_bus_directory = directory;
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}
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ErrorOr<NonnullRefPtr<SysFSUSBDeviceInformation>> SysFSUSBDeviceInformation::create(USB::Device& device)
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{
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auto device_name = TRY(KString::number(device.address()));
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return adopt_nonnull_ref_or_enomem(new (nothrow) SysFSUSBDeviceInformation(move(device_name), device));
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}
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}
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