Class Superblock

java.lang.Object

Superblock

public class Superblock
extends java.lang.Object

This class reads the data of an ext2 filesystem's SuperBlock

Author:

Petros Soutzis, 2017-19

Field Summary

Fields

Modifier and Type	Field and Description
private int	blockCount
private int	blocksPerGroup
private java.nio.ByteBuffer	buffer
private int	inodeCount
private int	inodesPerGroup
private int	sInodeSize
private short	sMagic
private java.lang.String	volumeName

Constructor Summary

Constructors

Constructor and Description
Superblock(byte[] bytes) Constructor of the Superblock class

Method Summary

Modifier and Type	Method and Description
(package private) int	getBlockCount()
(package private) int	getBlockGroupCount(int num_of_blocks, int blocks_per_group)
(package private) int	getBlocksPerGroup()
(package private) int	getInodeCount()
(package private) int	getInodeSize()
(package private) int	getInodesPerGroup()
(package private) java.lang.String	getVolumeName()
(package private) void	printGenericData(int inodeSize, int blockGroupCount)
private void	read() This method will readBytes all the data that is contained in the Superblock, from the buffer in which the byte array was parsed

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

sMagic

private short sMagic

inodeCount

private int inodeCount

blockCount

private int blockCount

blocksPerGroup

private int blocksPerGroup

inodesPerGroup

private int inodesPerGroup

sInodeSize

private int sInodeSize

volumeName

private java.lang.String volumeName

buffer

private java.nio.ByteBuffer buffer

Constructor Detail

Superblock

public Superblock(byte[] bytes)

Constructor of the Superblock class

Parameters:

bytes - is the byte array that contains the Superblock's data

Method Detail

read

private void read()

This method will readBytes all the data that is contained in the Superblock, from the buffer in which the byte array was parsed

getInodeSize

int getInodeSize()

Returns:

The total size of each Inode

getInodeCount

int getInodeCount()

Returns:

The total number of inodes in filesystem

getInodesPerGroup

int getInodesPerGroup()

Returns:

The total number of inodes in every block group

getBlockCount

int getBlockCount()

Returns:

The total number of blocks in filesystem

getBlocksPerGroup

int getBlocksPerGroup()

Returns:

The total number of blocks in every block group

getVolumeName

java.lang.String getVolumeName()

Returns:

The disk's name

getBlockGroupCount

int getBlockGroupCount(int num_of_blocks,
                       int blocks_per_group)

Parameters:

num_of_blocks - the total number of blocks in the filesystem

blocks_per_group - the total number of blocks in every block group

Returns:

The total number of block groups that the volume has

printGenericData

void printGenericData(int inodeSize,
                      int blockGroupCount)