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100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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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/HashMap.h>
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#include <AK/Types.h>
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#include <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/Inode.h>
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#include <Kernel/Forward.h>
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#include <Kernel/KBufferBuilder.h>
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#include <Kernel/Lock.h>
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#include <Kernel/ProcessExposed.h>
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namespace Kernel {
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class ProcFS final : public FileSystem {
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friend class ProcFSInode;
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friend class ProcFSDirectoryInode;
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public:
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virtual ~ProcFS() override;
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static RefPtr<ProcFS> create();
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virtual bool initialize() override;
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virtual const char* class_name() const override { return "ProcFS"; }
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virtual NonnullRefPtr<Inode> root_inode() const override;
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private:
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ProcFS();
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NonnullRefPtr<ProcFSDirectoryInode> m_root_inode;
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};
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class ProcFSInode : public Inode {
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friend class ProcFS;
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public:
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static NonnullRefPtr<ProcFSInode> create(const ProcFS&, const ProcFSExposedComponent&);
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virtual ~ProcFSInode() override;
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StringView name() const;
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protected:
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ProcFSInode(const ProcFS&, const ProcFSExposedComponent&);
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// ^Inode
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virtual KResult attach(FileDescription& description) override;
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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, const UserOrKernelBuffer& buffer, FileDescription*) override;
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virtual KResultOr<NonnullRefPtr<Inode>> create_child(const String& name, mode_t, dev_t, uid_t, gid_t) override;
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virtual KResult add_child(Inode&, const StringView& name, mode_t) override;
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virtual KResult remove_child(const StringView& name) override;
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virtual void did_seek(FileDescription&, off_t) 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<ProcFSExposedComponent> m_associated_component;
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};
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class ProcFSLinkInode : public ProcFSInode {
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friend class ProcFS;
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public:
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static NonnullRefPtr<ProcFSLinkInode> create(const ProcFS&, const ProcFSExposedComponent&);
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protected:
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ProcFSLinkInode(const ProcFS&, const ProcFSExposedComponent&);
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virtual InodeMetadata metadata() const override;
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};
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class ProcFSDirectoryInode : public ProcFSInode {
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friend class ProcFS;
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public:
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static NonnullRefPtr<ProcFSDirectoryInode> create(const ProcFS&, const ProcFSExposedComponent&);
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virtual ~ProcFSDirectoryInode() override;
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protected:
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ProcFSDirectoryInode(const ProcFS&, const ProcFSExposedComponent&);
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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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ProcFS& m_parent_fs;
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};
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}
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