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62 lines
2.2 KiB
C++
62 lines
2.2 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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#pragma once
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#include <AK/Function.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <Kernel/FileSystem/File.h>
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/KResult.h>
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#include <Kernel/UserOrKernelBuffer.h>
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namespace Kernel {
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class SysFS;
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class SystemExposedComponent : public RefCounted<SystemExposedComponent> {
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public:
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virtual KResultOr<size_t> entries_count() const { VERIFY_NOT_REACHED(); };
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virtual StringView name() const { return m_name->view(); }
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virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer&, FileDescription*) const { VERIFY_NOT_REACHED(); }
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virtual KResult traverse_as_directory(unsigned, Function<bool(const FS::DirectoryEntryView&)>) const { VERIFY_NOT_REACHED(); }
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virtual RefPtr<SystemExposedComponent> lookup(StringView) { VERIFY_NOT_REACHED(); };
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virtual KResultOr<size_t> write_bytes(off_t, size_t, const UserOrKernelBuffer&, FileDescription*) { return -EROFS; }
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virtual size_t size() const { return 0; }
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virtual NonnullRefPtr<Inode> to_inode(const SysFS& sysfs_instance) const;
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InodeIndex component_index() const { return m_component_index; };
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virtual ~SystemExposedComponent() = default;
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protected:
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explicit SystemExposedComponent(StringView name);
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private:
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NonnullOwnPtr<KString> m_name;
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InodeIndex m_component_index {};
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};
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class SystemExposedFolder : public SystemExposedComponent {
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public:
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virtual KResultOr<size_t> entries_count() const override { return m_components.size(); };
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virtual KResult traverse_as_directory(unsigned, Function<bool(const FS::DirectoryEntryView&)>) const override;
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virtual RefPtr<SystemExposedComponent> lookup(StringView name) override;
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void add_component(const SystemExposedComponent&);
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virtual NonnullRefPtr<Inode> to_inode(const SysFS& sysfs_instance) const override final;
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protected:
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explicit SystemExposedFolder(String name);
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SystemExposedFolder(String name, const SystemExposedFolder& parent_folder);
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NonnullRefPtrVector<SystemExposedComponent> m_components;
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RefPtr<SystemExposedFolder> m_parent_folder;
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};
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}
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