The Pedigree Project: Ext2Node Class Reference

The Pedigree Project 0.1

#include <Ext2Node.h>

Inheritance diagram for Ext2Node:

Collaboration diagram for Ext2Node:

Public Member Functions
	Ext2Node (uintptr_t inode_num, Inode pInode, class Ext2Filesystem pFs)

virtual	~Ext2Node ()

Inode *	getInode ()

uint32_t	getInodeNumber ()

void	fileAttributeChanged (size_t size, size_t atime, size_t mtime, size_t ctime)

void	updateMetadata (uint16_t uid, uint16_t gid, uint32_t perms)

void	wipe ()

void	extend (size_t newSize)

void	extend (size_t newSize, uint64_t location, uint64_t size)

uintptr_t	readBlock (uint64_t location)

void	writeBlock (uint64_t location)

void	trackBlock (uint32_t block)

void	pinBlock (uint64_t location)

void	unpinBlock (uint64_t location)

void	sync (size_t offset, bool async)

Protected Member Functions
bool	ensureLargeEnough (size_t size, uint64_t location, uint64_t opsize, bool onlyBlocks=false, bool nozeroblocks=false)

bool	addBlock (uint32_t blockValue)

bool	ensureBlockLoaded (size_t nBlock)

bool	getBlockNumber (size_t nBlock)

bool	getBlockNumberIndirect (uint32_t inode_block, size_t nBlocks, size_t nBlock)

bool	getBlockNumberBiindirect (uint32_t inode_block, size_t nBlocks, size_t nBlock)

bool	getBlockNumberTriindirect (uint32_t inode_block, size_t nBlocks, size_t nBlock)

bool	setBlockNumber (size_t blockNum, uint32_t blockValue)

uint32_t	modeToPermissions (uint32_t mode) const

uint32_t	permissionsToMode (uint32_t permissions) const

Protected Attributes
Inode *	m_pInode

uint32_t	m_InodeNumber

class Ext2Filesystem *	m_pExt2Fs

Vector< uint32_t >	m_Blocks

uint32_t	m_nMetadataBlocks

size_t	m_nSize

Private Member Functions
	Ext2Node (const Ext2Node &file)

Ext2Node &	operator= (const Ext2Node &)

Friends
class	Ext2Filesystem

Detailed Description

A node in an ext2 filesystem.

Definition at line 29 of file Ext2Node.h.

Constructor & Destructor Documentation

Ext2Node::Ext2Node ( const Ext2Node & file )

private

Copy constructors are hidden - unused!

Ext2Node::Ext2Node	(	uintptr_t	inode_num,
		Inode *	pInode,
		class Ext2Filesystem *	pFs
	)

Constructor, should be called only by a Filesystem.

Definition at line 30 of file Ext2Node.cc.

References Ext2Filesystem::m_BlockSize, Vector< T >::pushBack(), and Vector< T >::reserve().

Ext2Node::~Ext2Node ( )

virtual

Destructor

Definition at line 57 of file Ext2Node.cc.

References Vector< T >::count(), ERROR, Ext2Filesystem::m_BlockSize, Vector< T >::pushBack(), Ext2Filesystem::readBlock(), and Ext2Filesystem::writeBlock().

Member Function Documentation

bool Ext2Node::ensureLargeEnough	(	size_t	size,
		uint64_t	location,
		uint64_t	opsize,
		bool	onlyBlocks = `false`,
		bool	nozeroblocks = `false`
	)

protected

Ensures the inode is at least 'size' big. Set onlyBlocks to true to not change the actual data size, which can be useful for preallocation.

Definition at line 144 of file Ext2Node.cc.

References assert, Vector< T >::count(), ERROR, FATAL, fileAttributeChanged(), Ext2Filesystem::findFreeBlocks(), LIKELY, Ext2Filesystem::m_BlockSize, Vector< T >::pushBack(), Ext2Filesystem::readBlock(), and Ext2Filesystem::writeBlock().

Referenced by Ext2Filesystem::createNode(), Ext2File::preallocate(), and wipe().

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void Ext2Node::fileAttributeChanged	(	size_t	size,
		size_t	atime,
		size_t	mtime,
		size_t	ctime
	)

Updates inode attributes.

Todo:: 4GB files.

Definition at line 478 of file Ext2Node.cc.

References Vector< T >::count(), and Ext2Filesystem::m_BlockSize.

Referenced by ensureLargeEnough().

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void Ext2Node::updateMetadata	(	uint16_t	uid,
		uint16_t	gid,
		uint32_t	perms
	)

Updates inode metadata.

Definition at line 497 of file Ext2Node.cc.

References Vector< T >::count(), and Ext2Filesystem::m_BlockSize.

Referenced by Ext2File::fileAttributeChanged(), Ext2Symlink::fileAttributeChanged(), and Ext2Directory::fileAttributeChanged().

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void Ext2Node::wipe ( )

Wipes the node of data - frees all blocks.

Definition at line 115 of file Ext2Node.cc.

References Vector< T >::clear(), Vector< T >::count(), ensureLargeEnough(), and Ext2Filesystem::releaseBlock().

Referenced by Ext2Directory::removeEntry(), Ext2File::truncate(), and Ext2Symlink::truncate().

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The documentation for this class was generated from the following files: