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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/HashMap.h>
#include <AK/Types.h>
#include <Kernel/FileSystem/FileSystem.h>
#include <Kernel/FileSystem/Inode.h>
#include <Kernel/Forward.h>
#include <Kernel/KBufferBuilder.h>
#include <Kernel/Lock.h>
#include <Kernel/ProcessExposed.h>
namespace Kernel {
class ProcFS final : public FileSystem {
friend class ProcFSInode;
friend class ProcFSDirectoryInode;
public:
virtual ~ProcFS() override;
static RefPtr<ProcFS> create();
virtual bool initialize() override;
virtual const char* class_name() const override { return "ProcFS"; }
virtual NonnullRefPtr<Inode> root_inode() const override;
private:
ProcFS();
NonnullRefPtr<ProcFSDirectoryInode> m_root_inode;
};
class ProcFSInode : public Inode {
friend class ProcFS;
public:
static NonnullRefPtr<ProcFSInode> create(const ProcFS&, const ProcFSExposedComponent&);
virtual ~ProcFSInode() override;
StringView name() const;
protected:
ProcFSInode(const ProcFS&, const ProcFSExposedComponent&);
// ^Inode
virtual KResult attach(FileDescription& description) override;
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 RefPtr<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, const UserOrKernelBuffer& buffer, FileDescription*) override;
virtual KResultOr<NonnullRefPtr<Inode>> create_child(const String& name, mode_t, dev_t, uid_t, gid_t) override;
virtual KResult add_child(Inode&, const StringView& name, mode_t) override;
virtual KResult remove_child(const StringView& name) override;
virtual void did_seek(FileDescription&, off_t) override;
virtual KResultOr<size_t> directory_entry_count() const override;
virtual KResult chmod(mode_t) override;
virtual KResult chown(uid_t, gid_t) override;
virtual KResult truncate(u64) override;
NonnullRefPtr<ProcFSExposedComponent> m_associated_component;
};
class ProcFSLinkInode : public ProcFSInode {
friend class ProcFS;
public:
static NonnullRefPtr<ProcFSLinkInode> create(const ProcFS&, const ProcFSExposedComponent&);
protected:
ProcFSLinkInode(const ProcFS&, const ProcFSExposedComponent&);
virtual InodeMetadata metadata() const override;
};
class ProcFSDirectoryInode : public ProcFSInode {
friend class ProcFS;
public:
static NonnullRefPtr<ProcFSDirectoryInode> create(const ProcFS&, const ProcFSExposedComponent&);
virtual ~ProcFSDirectoryInode() override;
protected:
ProcFSDirectoryInode(const ProcFS&, const ProcFSExposedComponent&);
// ^Inode
virtual InodeMetadata metadata() const override;
virtual KResult traverse_as_directory(Function<bool(FileSystem::DirectoryEntryView const&)>) const override;
virtual RefPtr<Inode> lookup(StringView name) override;
virtual KResultOr<size_t> directory_entry_count() const override;
ProcFS& m_parent_fs;
};
}
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