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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Bus/USB/USBDevice.h>
#include <Kernel/FileSystem/SysFS.h>
#include <Kernel/KBufferBuilder.h>
#include <Kernel/Locking/Mutex.h>
namespace Kernel::USB {
class SysFSUSBDeviceInformation : public SysFSComponent {
friend class SysFSUSBBusDirectory;
public:
virtual ~SysFSUSBDeviceInformation() override;
static NonnullRefPtr<SysFSUSBDeviceInformation> create(USB::Device&);
RefPtr<USB::Device> device() const { return m_device; }
protected:
explicit SysFSUSBDeviceInformation(USB::Device& device);
virtual KResultOr<size_t> read_bytes(off_t offset, size_t count, UserOrKernelBuffer& buffer, FileDescription*) const override;
IntrusiveListNode<SysFSUSBDeviceInformation, RefPtr<SysFSUSBDeviceInformation>> m_list_node;
NonnullRefPtr<USB::Device> m_device;
private:
KResult try_generate(KBufferBuilder&);
virtual KResult refresh_data(FileDescription& description) const override;
mutable Mutex m_lock { "SysFSUSBDeviceInformation" };
};
class SysFSUSBBusDirectory final : public SysFSDirectory {
public:
static void initialize();
static SysFSUSBBusDirectory& the();
void plug(USB::Device&);
void unplug(USB::Device&);
virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual RefPtr<SysFSComponent> lookup(StringView name) override;
private:
explicit SysFSUSBBusDirectory(SysFSBusDirectory&);
RefPtr<SysFSUSBDeviceInformation> device_node_for(USB::Device& device);
IntrusiveList<SysFSUSBDeviceInformation, RefPtr<SysFSUSBDeviceInformation>, &SysFSUSBDeviceInformation::m_list_node> m_device_nodes;
mutable Spinlock m_lock;
};
}
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