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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/Inode.h>
#include <Kernel/FileSystem/SysFS/Component.h>
#include <Kernel/Locking/MutexProtected.h>
namespace Kernel {
class SysFS final : public FileSystem {
friend class SysFSInode;
friend class SysFSDirectoryInode;
public:
virtual ~SysFS() override;
static ErrorOr<NonnullRefPtr<FileSystem>> try_create();
virtual ErrorOr<void> initialize() override;
virtual StringView class_name() const override { return "SysFS"sv; }
virtual Inode& root_inode() override;
private:
SysFS();
RefPtr<SysFSInode> m_root_inode;
};
class SysFSInode : public Inode {
friend class SysFS;
friend class SysFSDirectoryInode;
public:
static ErrorOr<NonnullRefPtr<SysFSInode>> try_create(SysFS const&, SysFSComponent const&);
StringView name() const { return m_associated_component->name(); }
protected:
SysFSInode(SysFS const&, SysFSComponent const&);
virtual ErrorOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer& buffer, OpenFileDescription*) const override;
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
virtual ErrorOr<NonnullRefPtr<Inode>> lookup(StringView name) override;
virtual ErrorOr<void> flush_metadata() override;
virtual InodeMetadata metadata() const override;
virtual ErrorOr<size_t> write_bytes(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*) override;
virtual ErrorOr<NonnullRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, UserID, GroupID) override;
virtual ErrorOr<void> add_child(Inode&, StringView name, mode_t) override;
virtual ErrorOr<void> remove_child(StringView name) override;
virtual ErrorOr<void> chmod(mode_t) override;
virtual ErrorOr<void> chown(UserID, GroupID) override;
virtual ErrorOr<void> truncate(u64) override;
virtual ErrorOr<void> set_mtime(time_t) override;
virtual ErrorOr<void> attach(OpenFileDescription& description) override final;
virtual void did_seek(OpenFileDescription&, off_t) override final;
NonnullRefPtr<SysFSComponent> m_associated_component;
};
class SysFSDirectoryInode : public SysFSInode {
friend class SysFS;
public:
static ErrorOr<NonnullRefPtr<SysFSDirectoryInode>> try_create(SysFS const&, SysFSComponent const&);
virtual ~SysFSDirectoryInode() override;
SysFS& fs() { return static_cast<SysFS&>(Inode::fs()); }
SysFS const& fs() const { return static_cast<SysFS const&>(Inode::fs()); }
protected:
SysFSDirectoryInode(SysFS const&, SysFSComponent const&);
// ^Inode
virtual InodeMetadata metadata() const override;
virtual ErrorOr<void> traverse_as_directory(Function<ErrorOr<void>(FileSystem::DirectoryEntryView const&)>) const override;
virtual ErrorOr<NonnullRefPtr<Inode>> lookup(StringView name) override;
};
}
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