111 lines
3.4 KiB
C++
111 lines
3.4 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 <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/Inode.h>
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#include <Kernel/SystemExposed.h>
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namespace Kernel {
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class SysFSRootFolder final : public SysFSDirectory {
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friend class SysFSComponentRegistry;
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public:
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static NonnullRefPtr<SysFSRootFolder> create();
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virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
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private:
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SysFSRootFolder();
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};
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class SysFSComponentRegistry {
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friend class SysFS;
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friend class SysFSComponent;
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friend class SysFSDirectory;
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friend class SysFSRootFolder;
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public:
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static SysFSComponentRegistry& the();
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static void initialize();
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SysFSComponentRegistry();
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void register_new_component(SysFSComponent&);
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NonnullRefPtr<SysFSDirectory> root_folder() { return m_root_folder; }
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private:
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Lock m_lock;
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NonnullRefPtr<SysFSRootFolder> m_root_folder;
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};
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class SysFS final : public FileSystem {
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friend class SysFSInode;
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friend class SysFSDirectoryInode;
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public:
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virtual ~SysFS() override;
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static NonnullRefPtr<SysFS> create();
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virtual bool initialize() override;
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virtual char const* class_name() const override { return "SysFS"; }
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virtual NonnullRefPtr<Inode> root_inode() const override;
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private:
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SysFS();
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NonnullRefPtr<SysFSInode> m_root_inode;
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};
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class SysFSInode : public Inode {
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friend class SysFS;
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friend class SysFSDirectoryInode;
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public:
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static NonnullRefPtr<SysFSInode> create(SysFS const&, SysFSComponent const&);
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StringView name() const { return m_associated_component->name(); }
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protected:
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SysFSInode(SysFS const&, SysFSComponent const&);
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virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
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virtual KResult traverse_as_directory(Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
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virtual RefPtr<Inode> lookup(StringView name) override;
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virtual void flush_metadata() override;
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virtual InodeMetadata metadata() const override;
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virtual KResultOr<size_t> write_bytes(off_t, size_t, UserOrKernelBuffer const&, FileDescription*) override;
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virtual KResultOr<NonnullRefPtr<Inode>> create_child(String const& name, mode_t, dev_t, uid_t, gid_t) override;
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virtual KResult add_child(Inode&, StringView const& name, mode_t) override;
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virtual KResult remove_child(StringView const& name) override;
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virtual KResultOr<size_t> directory_entry_count() const override;
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virtual KResult chmod(mode_t) override;
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virtual KResult chown(uid_t, gid_t) override;
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virtual KResult truncate(u64) override;
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NonnullRefPtr<SysFSComponent> m_associated_component;
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};
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class SysFSDirectoryInode : public SysFSInode {
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friend class SysFS;
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public:
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static NonnullRefPtr<SysFSDirectoryInode> create(SysFS const&, SysFSComponent const&);
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virtual ~SysFSDirectoryInode() override;
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protected:
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SysFSDirectoryInode(SysFS const&, SysFSComponent const&);
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// ^Inode
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virtual InodeMetadata metadata() const override;
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virtual KResult traverse_as_directory(Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
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virtual RefPtr<Inode> lookup(StringView name) override;
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virtual KResultOr<size_t> directory_entry_count() const override;
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SysFS& m_parent_fs;
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};
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}
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