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43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
/*
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* Copyright (c) 2018-2021, 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 <Kernel/FileSystem/FileSystem.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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namespace Kernel {
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class FileBackedFileSystem : public FileSystem {
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friend class VirtualFileSystem;
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public:
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virtual ~FileBackedFileSystem() override;
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File& file() { return m_file_description->file(); }
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OpenFileDescription& file_description() { return *m_file_description; }
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File const& file() const { return m_file_description->file(); }
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OpenFileDescription& file_description() const { return *m_file_description; }
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protected:
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explicit FileBackedFileSystem(OpenFileDescription&);
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// Note: We require all FileBackedFileSystem to implement something that actually
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// takes into account the fact that we will clean the last mount of the filesystem,
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// therefore, removing the file system with it from the Kernel memory.
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virtual ErrorOr<void> prepare_to_clear_last_mount(Inode& mount_guest_inode) override = 0;
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virtual ErrorOr<void> initialize_while_locked() = 0;
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virtual bool is_initialized_while_locked() = 0;
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private:
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virtual ErrorOr<void> initialize() override final;
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virtual bool is_file_backed() const override { return true; }
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IntrusiveListNode<FileBackedFileSystem> m_file_backed_file_system_node;
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NonnullRefPtr<OpenFileDescription> const m_file_description;
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};
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}
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