public Ext( Device device, MBRPartitionEntry mbr_entry )
{
partition = new Partition( device, mbr_entry );
Byte[] sector = new Byte[ device.SectorSize ];
partition.Read( sector, 1024, device.SectorSize );
if ( sector[ 56 ] != 0x53 || sector[ 57 ] != 0xef ) throw new Exception( "Partition is not Ext2/3/4" );
Utils.LoadLE32( out inode_count, sector, 0 );
Utils.LoadLE32( out total_block_count, sector, 4 );
Utils.LoadLE32( out reserved_block_count, sector, 8 );
Utils.LoadLE32( out free_block_count, sector, 12 );
Utils.LoadLE32( out free_inode_count, sector, 16 );
Utils.LoadLE32( out first_data_block, sector, 20 );
Utils.LoadLE32( out block_size_pow, sector, 24 );
Utils.LoadLE32( out blocks_per_group, sector, 32 );
Utils.LoadLE32( out inodes_per_group, sector, 40 );
Utils.LoadLE16( out minor_revision, sector, 62 );
Utils.LoadLE32( out revision, sector, 76 );
Utils.LoadLE32( out first_useable_inode, sector, 84 );
Utils.LoadLE16( out inode_size, sector, 88 );
Utils.LoadLE32( out features_compatible, sector, 92 );
Utils.LoadLE32( out features_incompatible, sector, 96 );
Utils.LoadLE32( out features_ro_compatible, sector, 100 );
Utils.LoadLE32( out volume_id[0], sector, 104 );
Utils.LoadLE32( out volume_id[1], sector, 108 );
Utils.LoadLE32( out volume_id[2], sector, 112 );
Utils.LoadLE32( out volume_id[3], sector, 116 );
Utils.LoadString( out volume_name, 16, sector, 120 );
prealloc_file = sector[204];
prealloc_dir = sector[205];
Utils.LoadString( out journal_uuid, 16, sector, 208 );
Utils.LoadLE32( out journal_inode, sector, 224 );
Utils.LoadLE32( out journal_last_orphan, sector, 232 );
Utils.LoadLE32( out hash_seed[0], sector, 236 );
Utils.LoadLE32( out hash_seed[1], sector, 240 );
Utils.LoadLE32( out hash_seed[2], sector, 244 );
Utils.LoadLE32( out hash_seed[3], sector, 248 );
hash_version = sector[252];
Utils.LoadLE32( out first_meta_block_group, sector, 260 );
ext4 = ( ( features_ro_compatible & 0x0008 ) != 0 ) ||
( ( features_ro_compatible & 0x0010 ) != 0 ) ||
( ( features_ro_compatible & 0x0020 ) != 0 ) ||
( ( features_ro_compatible & 0x0040 ) != 0 ) ||
( ( features_incompatible & 0x0040 ) != 0 ) ||
( ( features_incompatible & 0x0080 ) != 0 ) ||
( ( features_incompatible & 0x0100 ) != 0 ) ||
( ( features_incompatible & 0x0200 ) != 0 ) ||
( ( features_incompatible & 0x0400 ) != 0 ) ||
( ( features_incompatible & 0x1000 ) != 0 );
uint block_group_count = ( total_block_count + blocks_per_group-1 )/blocks_per_group;
for ( uint i=0; i<block_group_count; ++i )
{
bg_descriptors.Add( GetGroupDescriptor( i ) );
}
}
public void TestMBRPartitionEntryStructure()
{
var mbrPartitionStructure = new MBRPartitionEntry();
var realSize = Marshal.SizeOf(mbrPartitionStructure);
var expected = 16;
var message = String.Format("Expected: {0}, found: {1}", expected, realSize);
Assert.AreEqual(expected, realSize, message);
}
public Ext(Device device, MBRPartitionEntry mbr_entry)
{
partition = new Partition(device, mbr_entry);
Byte[] sector = new Byte[device.SectorSize];
partition.Read(sector, 1024, device.SectorSize);
if (sector[56] != 0x53 || sector[57] != 0xef)
{
throw new Exception("Partition is not Ext2/3/4");
}
Utils.LoadLE32(out inode_count, sector, 0);
Utils.LoadLE32(out total_block_count, sector, 4);
Utils.LoadLE32(out reserved_block_count, sector, 8);
Utils.LoadLE32(out free_block_count, sector, 12);
Utils.LoadLE32(out free_inode_count, sector, 16);
Utils.LoadLE32(out first_data_block, sector, 20);
Utils.LoadLE32(out block_size_pow, sector, 24);
Utils.LoadLE32(out blocks_per_group, sector, 32);
Utils.LoadLE32(out inodes_per_group, sector, 40);
Utils.LoadLE16(out minor_revision, sector, 62);
Utils.LoadLE32(out revision, sector, 76);
Utils.LoadLE32(out first_useable_inode, sector, 84);
Utils.LoadLE16(out inode_size, sector, 88);
Utils.LoadLE32(out features_compatible, sector, 92);
Utils.LoadLE32(out features_incompatible, sector, 96);
Utils.LoadLE32(out features_ro_compatible, sector, 100);
Utils.LoadLE32(out volume_id[0], sector, 104);
Utils.LoadLE32(out volume_id[1], sector, 108);
Utils.LoadLE32(out volume_id[2], sector, 112);
Utils.LoadLE32(out volume_id[3], sector, 116);
Utils.LoadString(out volume_name, 16, sector, 120);
prealloc_file = sector[204];
prealloc_dir = sector[205];
Utils.LoadString(out journal_uuid, 16, sector, 208);
Utils.LoadLE32(out journal_inode, sector, 224);
Utils.LoadLE32(out journal_last_orphan, sector, 232);
Utils.LoadLE32(out hash_seed[0], sector, 236);
Utils.LoadLE32(out hash_seed[1], sector, 240);
Utils.LoadLE32(out hash_seed[2], sector, 244);
Utils.LoadLE32(out hash_seed[3], sector, 248);
hash_version = sector[252];
Utils.LoadLE32(out first_meta_block_group, sector, 260);
ext4 = ((features_ro_compatible & 0x0008) != 0) ||
((features_ro_compatible & 0x0010) != 0) ||
((features_ro_compatible & 0x0020) != 0) ||
((features_ro_compatible & 0x0040) != 0) ||
((features_incompatible & 0x0040) != 0) ||
((features_incompatible & 0x0080) != 0) ||
((features_incompatible & 0x0100) != 0) ||
((features_incompatible & 0x0200) != 0) ||
((features_incompatible & 0x0400) != 0) ||
((features_incompatible & 0x1000) != 0);
uint block_group_count = (total_block_count + blocks_per_group - 1) / blocks_per_group;
for (uint i = 0; i < block_group_count; ++i)
{
bg_descriptors.Add(GetGroupDescriptor(i));
}
}
