mirror of
https://github.com/SerenityOS/serenity
synced 2024-09-06 17:06:31 +00:00
66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
#pragma once
|
|
|
|
#include "DeviceBackedFileSystem.h"
|
|
#include <AK/Buffer.h>
|
|
#include <AK/OwnPtr.h>
|
|
|
|
struct ext2_group_desc;
|
|
struct ext2_inode;
|
|
struct ext2_super_block;
|
|
|
|
class Ext2FileSystem final : public DeviceBackedFileSystem {
|
|
public:
|
|
static RetainPtr<Ext2FileSystem> create(RetainPtr<BlockDevice>);
|
|
virtual ~Ext2FileSystem() override;
|
|
|
|
private:
|
|
explicit Ext2FileSystem(RetainPtr<BlockDevice>);
|
|
|
|
const ext2_super_block& superBlock() const;
|
|
const ext2_group_desc& blockGroupDescriptor(unsigned groupIndex) const;
|
|
unsigned firstBlockOfGroup(unsigned groupIndex) const;
|
|
unsigned inodesPerBlock() const;
|
|
unsigned inodesPerGroup() const;
|
|
unsigned blocksPerGroup() const;
|
|
unsigned inodeSize() const;
|
|
|
|
OwnPtr<ext2_inode> lookupExt2Inode(unsigned) const;
|
|
bool writeExt2Inode(unsigned, const ext2_inode&);
|
|
ByteBuffer readBlockContainingInode(unsigned inode, unsigned& blockIndex, unsigned& offset) const;
|
|
|
|
ByteBuffer readSuperBlock() const;
|
|
bool writeSuperBlock(const ext2_super_block&);
|
|
|
|
virtual bool initialize() override;
|
|
virtual const char* className() const override;
|
|
virtual InodeIdentifier rootInode() const override;
|
|
virtual ByteBuffer readInode(InodeIdentifier) const override;
|
|
virtual bool writeInode(InodeIdentifier, const ByteBuffer&) override;
|
|
virtual bool enumerateDirectoryInode(InodeIdentifier, std::function<bool(const DirectoryEntry&)>) const override;
|
|
virtual InodeMetadata inodeMetadata(InodeIdentifier) const override;
|
|
virtual bool setModificationTime(InodeIdentifier, dword timestamp) override;
|
|
virtual InodeIdentifier createInode(InodeIdentifier parentInode, const String& name, word mode) override;
|
|
|
|
bool isDirectoryInode(unsigned) const;
|
|
unsigned allocateInode(unsigned preferredGroup, unsigned expectedSize);
|
|
unsigned groupIndexFromInode(unsigned) const;
|
|
|
|
Vector<unsigned> blockListForInode(const ext2_inode&) const;
|
|
|
|
void dumpBlockBitmap(unsigned groupIndex) const;
|
|
void dumpInodeBitmap(unsigned groupIndex) const;
|
|
|
|
template<typename F>
|
|
void traverseInodeBitmap(unsigned groupIndex, F) const;
|
|
|
|
bool addInodeToDirectory(unsigned directoryInode, unsigned inode, const String& name);
|
|
bool writeDirectoryInode(unsigned directoryInode, Vector<DirectoryEntry>&&);
|
|
bool setInodeAllocationState(unsigned inode, bool);
|
|
|
|
unsigned m_blockGroupCount { 0 };
|
|
|
|
mutable ByteBuffer m_cachedSuperBlock;
|
|
mutable ByteBuffer m_cachedBlockGroupDescriptorTable;
|
|
};
|
|
|