mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 01:45:07 +00:00
10c470e95f
...by adding a new class called Ext2Inode that inherits CoreInode. The idea is that a vnode will wrap a CoreInode rather than InodeIdentifier. Each CoreInode subclass can keep whatever caches they like. Right now, Ext2Inode caches the list of block indices since it can be very expensive to retrieve.
53 lines
2 KiB
C++
53 lines
2 KiB
C++
#pragma once
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#include "FileSystem.h"
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#include "UnixTypes.h"
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#include <AK/HashMap.h>
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class SyntheticFileSystem : public FileSystem {
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public:
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virtual ~SyntheticFileSystem() override;
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static RetainPtr<SyntheticFileSystem> create();
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virtual bool initialize() override;
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virtual const char* className() const override;
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virtual InodeIdentifier rootInode() const override;
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virtual bool writeInode(InodeIdentifier, const ByteBuffer&) override;
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virtual bool enumerateDirectoryInode(InodeIdentifier, Function<bool(const DirectoryEntry&)>) const override;
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virtual InodeMetadata inodeMetadata(InodeIdentifier) const override;
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virtual bool setModificationTime(InodeIdentifier, dword timestamp) override;
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virtual InodeIdentifier createInode(InodeIdentifier parentInode, const String& name, Unix::mode_t, unsigned size) override;
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virtual Unix::ssize_t readInodeBytes(InodeIdentifier, Unix::off_t offset, Unix::size_t count, byte* buffer, FileDescriptor*) const override;
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virtual InodeIdentifier makeDirectory(InodeIdentifier parentInode, const String& name, Unix::mode_t) override;
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virtual InodeIdentifier findParentOfInode(InodeIdentifier) const override;
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virtual RetainPtr<CoreInode> get_inode(InodeIdentifier) override;
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protected:
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typedef unsigned InodeIndex;
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InodeIndex generateInodeIndex();
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static constexpr InodeIndex RootInodeIndex = 1;
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SyntheticFileSystem();
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struct File {
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String name;
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InodeMetadata metadata;
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InodeIdentifier parent;
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ByteBuffer data;
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Function<ByteBuffer()> generator;
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Vector<File*> children;
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};
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OwnPtr<File> createDirectory(String&& name);
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OwnPtr<File> createTextFile(String&& name, ByteBuffer&&, Unix::mode_t = 0010644);
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OwnPtr<File> createGeneratedFile(String&& name, Function<ByteBuffer()>&&, Unix::mode_t = 0100644);
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InodeIdentifier addFile(OwnPtr<File>&&, InodeIndex parent = RootInodeIndex);
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bool removeFile(InodeIndex);
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private:
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InodeIndex m_nextInodeIndex { 2 };
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HashMap<InodeIndex, OwnPtr<File>> m_inodes;
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};
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