blob: 5b29d55ad18d142547a61a1ea6806de67b226046 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
package org.openslx.util.vm;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import org.apache.log4j.Logger;
import org.openslx.bwlp.thrift.iface.Virtualizer;
import org.openslx.util.Util;
public class DiskImage
{
/**
* Big endian representation of the 4 bytes 'KDMV'
*/
private static final int VMDK_MAGIC = 0x4b444d56;
private static final String VDI_PREFIX = "<<< ";
private static final String VDI_SUFFIX = "Disk Image >>>";
private static final Logger LOGGER = Logger.getLogger( VboxMetaData.class );
public enum ImageFormat
{
VMDK( "vmdk" ),
QCOW2( "qcow2" ),
VDI( "vdi" );
public final String extension;
private ImageFormat( String extension )
{
this.extension = extension;
}
public static ImageFormat defaultForVirtualizer( Virtualizer virt )
{
if ( virt == null )
return null;
return defaultForVirtualizer( virt.virtId );
}
public static ImageFormat defaultForVirtualizer( String virtId )
{
if ( virtId == null )
return null;
if ( virtId.equals( "vmware" ) )
return VMDK;
if ( virtId.equals( "virtualbox" ) )
return VDI;
return null;
}
}
public final boolean isStandalone;
public final boolean isCompressed;
public final boolean isSnapshot;
public final ImageFormat format;
public final String subFormat;
public final int hwVersion;
public ImageFormat getImageFormat()
{
return format;
}
public DiskImage( File disk ) throws FileNotFoundException, IOException, UnknownImageFormatException
{
try ( RandomAccessFile file = new RandomAccessFile( disk, "r" ) ) {
// vmdk
if ( file.readInt() == VMDK_MAGIC ) {
file.seek( 512 );
byte[] buffer = new byte[ 2048 ];
file.readFully( buffer );
VmwareConfig config;
try {
config = new VmwareConfig( buffer, findNull( buffer ) );
} catch ( UnsupportedVirtualizerFormatException e ) {
config = null;
}
if ( config != null ) {
subFormat = config.get( "createType" );
String parent = config.get( "parentCID" );
this.isStandalone = isStandaloneCreateType( subFormat, parent );
this.isCompressed = subFormat != null && subFormat.equalsIgnoreCase( "streamOptimized" );
this.isSnapshot = parent != null && !parent.equalsIgnoreCase( "ffffffff" );
this.format = ImageFormat.VMDK;
String hwv = config.get( "ddb.virtualHWVersion" );
if ( hwv == null ) {
this.hwVersion = 10;
} else {
this.hwVersion = Util.parseInt( hwv, 10 );
}
return;
}
}
// vdi
file.seek( 0 );
byte[] prefixBuffer = new byte[ VDI_PREFIX.length() ];
file.readFully( prefixBuffer );
String prefixString = new String( prefixBuffer );
if ( VDI_PREFIX.equals( prefixString ) ) {
byte[] localBuffer = new byte[ 1 ];
byte[] suffixBuffer = new byte[ VDI_SUFFIX.length() - 1 ];
// 30 in this case would be the remaining length of the vdi header
// the longest string to date would be "<<< QEMU VM Virtual Disk Image >>>"
// if the loop doesn't find the first letter of the VID_SUFFIX then we have another format on our hands and should throw exception
for ( int i = 0; i < 30; i++ ) {
file.readFully( localBuffer );
String localString = new String( localBuffer );
LOGGER.debug( localString );
if ( !localString.equals( VDI_SUFFIX.substring( 0, 1 ) ) ) {
continue;
}
file.readFully( suffixBuffer );
String suffixString = new String( suffixBuffer );
if ( suffixString.equals( VDI_SUFFIX.substring( 1 ) ) ) {
// TODO still don't know where they are found in a .vdi file
this.isStandalone = true;
this.isCompressed = false;
this.isSnapshot = false;
this.format = ImageFormat.VDI;
this.subFormat = "";
this.hwVersion = 0;
return;
} else {
// this will ensure the search doesn't stop at the first D we find
file.seek( i + VDI_PREFIX.length() + 1 );
}
}
}
}
throw new UnknownImageFormatException();
}
private int findNull( byte[] buffer )
{
for ( int i = 0; i < buffer.length; ++i ) {
if ( buffer[i] == 0 )
return i;
}
return buffer.length;
}
private boolean isStandaloneCreateType( String type, String parent )
{
if ( type == null )
return false;
if ( parent != null && !parent.equalsIgnoreCase( "ffffffff" ) )
return false;
return type.equalsIgnoreCase( "streamOptimized" ) || type.equalsIgnoreCase( "monolithicSparse" );
}
public static class UnknownImageFormatException extends Exception
{
private static final long serialVersionUID = -6647935235475007171L;
}
}
|
