aaru-dps/Aaru
1
0
Fork 0
mirror of https://github.com/aaru-dps/Aaru.git synced 2025-12-16 19:24:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Added support for devices with sectors bigger than 512bytes in

Browse Source 
ext1/2/3/4.
This commit is contained in:
Natalia Portillo
2017-09-19 19:53:03 +01:00
parent 77529762a7
commit d3fca2a4a2
2 changed files with 46 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
DiscImageChef.Filesystems/extFS.cs
View File

@@ -40,6 +40,8 @@ namespace DiscImageChef.Filesystems
// Information from the Linux kernel
public class extFS : Filesystem
{
const int sbPos = 0x400;
public extFS()
{
Name = "Linux extended Filesystem";
@@ -59,12 +61,17 @@ namespace DiscImageChef.Filesystems
public override bool Identify(ImagePlugins.ImagePlugin imagePlugin, Partition partition)
{
if((2 + partition.Start) >= partition.End)
ulong sbSector = sbPos / imagePlugin.GetSectorSize();
uint sbOff = sbPos % imagePlugin.GetSectorSize();
if((sbSector + partition.Start) >= partition.End)
return false;
byte[] sb_sector = imagePlugin.ReadSector(2 + partition.Start); // Superblock resides at 0x400
byte[] sb_sector = imagePlugin.ReadSector(sbSector + partition.Start);
byte[] sb = new byte[512];
Array.Copy(sb_sector, sbOff, sb, 0, 512);
ushort magic = BitConverter.ToUInt16(sb_sector, 0x038); // Here should reside magic number
ushort magic = BitConverter.ToUInt16(sb, 0x038);
return magic == extFSMagic;
}
@@ -75,7 +82,16 @@ namespace DiscImageChef.Filesystems
StringBuilder sb = new StringBuilder();
byte[] sb_sector = imagePlugin.ReadSector(2 + partition.Start); // Superblock resides at 0x400
ulong sbSector = sbPos / imagePlugin.GetSectorSize();
uint sbOff = sbPos % imagePlugin.GetSectorSize();
if((sbSector + partition.Start) >= partition.End)
return;
byte[] sblock = imagePlugin.ReadSector(sbSector + partition.Start);
byte[] sb_sector = new byte[512];
Array.Copy(sblock, sbOff, sb_sector, 0, 512);
extFSSuperBlock ext_sb = new extFSSuperBlock();
ext_sb.inodes = BitConverter.ToUInt32(sb_sector, 0x000);