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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/SysFSComponent.h>
namespace Kernel {
class SysFSRootDirectory final : public SysFSDirectory {
friend class SysFSComponentRegistry;
public:
static NonnullRefPtr<SysFSRootDirectory> create();
virtual KResult traverse_as_directory(unsigned, Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
private:
SysFSRootDirectory();
RefPtr<SysFSBusDirectory> m_buses_directory;
};
class SysFSBusDirectory : public SysFSDirectory {
friend class SysFSComponentRegistry;
public:
static NonnullRefPtr<SysFSBusDirectory> must_create(SysFSRootDirectory const&);
private:
explicit SysFSBusDirectory(SysFSRootDirectory const&);
};
class SysFSComponentRegistry {
public:
static SysFSComponentRegistry& the();
static void initialize();
SysFSComponentRegistry();
void register_new_component(SysFSComponent&);
SysFSDirectory& root_directory() { return m_root_directory; }
Mutex& get_lock() { return m_lock; }
void register_new_bus_directory(SysFSDirectory&);
SysFSBusDirectory& buses_directory();
private:
Mutex m_lock;
NonnullRefPtr<SysFSRootDirectory> m_root_directory;
};
class SysFS final : public FileSystem {
friend class SysFSInode;
friend class SysFSDirectoryInode;
public:
virtual ~SysFS() override;
static NonnullRefPtr<SysFS> create();
virtual KResult initialize() override;
virtual StringView class_name() const override { return "SysFS"sv; }
virtual Inode& root_inode() override;
private:
SysFS();
NonnullRefPtr<SysFSInode> m_root_inode;
};
class SysFSInode : public Inode {
friend class SysFS;
friend class SysFSDirectoryInode;
public:
static NonnullRefPtr<SysFSInode> create(SysFS const&, SysFSComponent const&);
StringView name() const { return m_associated_component->name(); }
protected:
SysFSInode(SysFS const&, SysFSComponent const&);
virtual KResultOr<size_t> read_bytes(off_t, size_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
virtual KResult traverse_as_directory(Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual KResultOr<NonnullRefPtr<Inode>> lookup(StringView name) override;
virtual void flush_metadata() override;
virtual InodeMetadata metadata() const override;
virtual KResultOr<size_t> write_bytes(off_t, size_t, UserOrKernelBuffer const&, FileDescription*) override;
virtual KResultOr<NonnullRefPtr<Inode>> create_child(StringView name, mode_t, dev_t, uid_t, gid_t) override;
virtual KResult add_child(Inode&, StringView const& name, mode_t) override;
virtual KResult remove_child(StringView const& name) override;
virtual KResult chmod(mode_t) override;
virtual KResult chown(uid_t, gid_t) override;
virtual KResult truncate(u64) override;
NonnullRefPtr<SysFSComponent> m_associated_component;
};
class SysFSDirectoryInode : public SysFSInode {
friend class SysFS;
public:
static NonnullRefPtr<SysFSDirectoryInode> 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 KResult traverse_as_directory(Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual KResultOr<NonnullRefPtr<Inode>> lookup(StringView name) override;
};
}
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