diff --git a/DiscImageChef.DiscImages/QCOW2.cs b/DiscImageChef.DiscImages/QCOW2.cs index dec72fb47..8ef5ef97e 100644 --- a/DiscImageChef.DiscImages/QCOW2.cs +++ b/DiscImageChef.DiscImages/QCOW2.cs @@ -33,6 +33,7 @@ using System; using System.Collections.Generic; using System.IO; +using System.Linq; using System.Runtime.InteropServices; using DiscImageChef.CommonTypes; using DiscImageChef.Console; @@ -42,80 +43,82 @@ using SharpCompress.Compressors.Deflate; namespace DiscImageChef.DiscImages { - public class Qcow2 : IMediaImage + public class Qcow2 : IWritableImage { /// /// Magic number: 'Q', 'F', 'I', 0xFB /// - const uint QCOW_MAGIC = 0x514649FB; - const uint QCOW_VERSION2 = 2; - const uint QCOW_VERSION3 = 3; + const uint QCOW_MAGIC = 0x514649FB; + const uint QCOW_VERSION2 = 2; + const uint QCOW_VERSION3 = 3; const uint QCOW_ENCRYPTION_NONE = 0; - const uint QCOW_ENCRYPTION_AES = 1; + const uint QCOW_ENCRYPTION_AES = 1; - const ulong QCOW_FEATURE_DIRTY = 0x01; + const ulong QCOW_FEATURE_DIRTY = 0x01; const ulong QCOW_FEATURE_CORRUPT = 0x02; - const ulong QCOW_FEATURE_MASK = 0xFFFFFFFFFFFFFFFC; + const ulong QCOW_FEATURE_MASK = 0xFFFFFFFFFFFFFFFC; const ulong QCOW_COMPAT_FEATURE_LAZY_REFCOUNTS = 0x01; - const ulong QCOW_AUTO_CLEAR_FEATURE_BITMAP = 0x01; + const ulong QCOW_AUTO_CLEAR_FEATURE_BITMAP = 0x01; const ulong QCOW_FLAGS_MASK = 0x3FFFFFFFFFFFFFFF; - const ulong QCOW_COPIED = 0x8000000000000000; + const ulong QCOW_COPIED = 0x8000000000000000; const ulong QCOW_COMPRESSED = 0x4000000000000000; - const ulong QCOW_HEADER_EXTENSION_BACKING_FILE = 0xE2792ACA; + const ulong QCOW_HEADER_EXTENSION_BACKING_FILE = 0xE2792ACA; const ulong QCOW_HEADER_EXTENSION_FEATURE_TABLE = 0x6803F857; - const ulong QCOW_HEADER_EXTENSION_BITMAPS = 0x23852875; + const ulong QCOW_HEADER_EXTENSION_BITMAPS = 0x23852875; const int MAX_CACHE_SIZE = 16777216; - const int MAX_CACHED_SECTORS = MAX_CACHE_SIZE / 512; + const int MAX_CACHED_SECTORS = MAX_CACHE_SIZE / 512; Dictionary clusterCache; - int clusterSectors; - int clusterSize; - ImageInfo imageInfo; + int clusterSectors; + int clusterSize; + ImageInfo imageInfo; Stream imageStream; - ulong l1Mask; - int l1Shift; - ulong[] l1Table; - int l2Bits; - ulong l2Mask; - int l2Size; + ulong l1Mask; + int l1Shift; + ulong[] l1Table; + int l2Bits; + ulong l2Mask; + int l2Size; Dictionary l2TableCache; - int maxClusterCache; - int maxL2TableCache; + int maxClusterCache; + int maxL2TableCache; QCow2Header qHdr; + ulong[] refCountTable; Dictionary sectorCache; - ulong sectorMask; + ulong sectorMask; + FileStream writingStream; public Qcow2() { imageInfo = new ImageInfo { - ReadableSectorTags = new List(), - ReadableMediaTags = new List(), - HasPartitions = false, - HasSessions = false, - Version = null, - Application = "QEMU", - ApplicationVersion = null, - Creator = null, - Comments = null, - MediaManufacturer = null, - MediaModel = null, - MediaSerialNumber = null, - MediaBarcode = null, - MediaPartNumber = null, - MediaSequence = 0, - LastMediaSequence = 0, - DriveManufacturer = null, - DriveModel = null, - DriveSerialNumber = null, + ReadableSectorTags = new List(), + ReadableMediaTags = new List(), + HasPartitions = false, + HasSessions = false, + Version = null, + Application = "QEMU", + ApplicationVersion = null, + Creator = null, + Comments = null, + MediaManufacturer = null, + MediaModel = null, + MediaSerialNumber = null, + MediaBarcode = null, + MediaPartNumber = null, + MediaSequence = 0, + LastMediaSequence = 0, + DriveManufacturer = null, + DriveModel = null, + DriveSerialNumber = null, DriveFirmwareRevision = null }; } @@ -123,7 +126,7 @@ namespace DiscImageChef.DiscImages public ImageInfo Info => imageInfo; public string Name => "QEMU Copy-On-Write disk image v2"; - public Guid Id => new Guid("F20107CB-95B3-4398-894B-975261F1E8C5"); + public Guid Id => new Guid("F20107CB-95B3-4398-894B-975261F1E8C5"); public string Format => "QEMU Copy-On-Write"; @@ -148,7 +151,7 @@ namespace DiscImageChef.DiscImages qHdr = BigEndianMarshal.ByteArrayToStructureBigEndian(qHdrB); DicConsole.DebugWriteLine("QCOW plugin", "qHdr.magic = 0x{0:X8}", qHdr.magic); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.version = {0}", qHdr.version); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.version = {0}", qHdr.version); return qHdr.magic == QCOW_MAGIC && (qHdr.version == QCOW_VERSION2 || qHdr.version == QCOW_VERSION3); } @@ -164,28 +167,28 @@ namespace DiscImageChef.DiscImages stream.Read(qHdrB, 0, Marshal.SizeOf(qHdr)); qHdr = BigEndianMarshal.ByteArrayToStructureBigEndian(qHdrB); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.magic = 0x{0:X8}", qHdr.magic); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.version = {0}", qHdr.version); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_offset = {0}", qHdr.backing_file_offset); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_size = {0}", qHdr.backing_file_size); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.cluster_bits = {0}", qHdr.cluster_bits); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.size = {0}", qHdr.size); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.crypt_method = {0}", qHdr.crypt_method); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1_size = {0}", qHdr.l1_size); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1_table_offset = {0}", qHdr.l1_table_offset); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.magic = 0x{0:X8}", qHdr.magic); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.version = {0}", qHdr.version); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_offset = {0}", qHdr.backing_file_offset); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.backing_file_size = {0}", qHdr.backing_file_size); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.cluster_bits = {0}", qHdr.cluster_bits); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.size = {0}", qHdr.size); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.crypt_method = {0}", qHdr.crypt_method); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1_size = {0}", qHdr.l1_size); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1_table_offset = {0}", qHdr.l1_table_offset); DicConsole.DebugWriteLine("QCOW plugin", "qHdr.refcount_table_offset = {0}", qHdr.refcount_table_offset); DicConsole.DebugWriteLine("QCOW plugin", "qHdr.refcount_table_clusters = {0}", qHdr.refcount_table_clusters); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.nb_snapshots = {0}", qHdr.nb_snapshots); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.nb_snapshots = {0}", qHdr.nb_snapshots); DicConsole.DebugWriteLine("QCOW plugin", "qHdr.snapshots_offset = {0}", qHdr.snapshots_offset); if(qHdr.version >= QCOW_VERSION3) { - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.features = {0:X}", qHdr.features); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.compat_features = {0:X}", qHdr.compat_features); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.features = {0:X}", qHdr.features); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.compat_features = {0:X}", qHdr.compat_features); DicConsole.DebugWriteLine("QCOW plugin", "qHdr.autoclear_features = {0:X}", qHdr.autoclear_features); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.refcount_order = {0}", qHdr.refcount_order); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.header_length = {0}", qHdr.header_length); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.refcount_order = {0}", qHdr.refcount_order); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.header_length = {0}", qHdr.header_length); if((qHdr.features & QCOW_FEATURE_MASK) != 0) throw new @@ -207,21 +210,16 @@ namespace DiscImageChef.DiscImages if(qHdr.backing_file_offset != 0) throw new NotImplementedException("Differencing images not yet supported"); - int shift = (int)(qHdr.cluster_bits + l2Bits); - - if(qHdr.size > ulong.MaxValue - (ulong)(1 << shift)) - throw new ArgumentOutOfRangeException(nameof(qHdr.size), "Image is too large"); - - clusterSize = 1 << (int)qHdr.cluster_bits; + clusterSize = 1 << (int)qHdr.cluster_bits; clusterSectors = 1 << ((int)qHdr.cluster_bits - 9); - l2Bits = (int)(qHdr.cluster_bits - 3); - l2Size = 1 << l2Bits; + l2Bits = (int)(qHdr.cluster_bits - 3); + l2Size = 1 << l2Bits; - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.clusterSize = {0}", clusterSize); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.clusterSize = {0}", clusterSize); DicConsole.DebugWriteLine("QCOW plugin", "qHdr.clusterSectors = {0}", clusterSectors); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.qHdr.l1_size = {0}", qHdr.l1_size); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Size = {0}", l2Size); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.sectors = {0}", imageInfo.Sectors); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.qHdr.l1_size = {0}", qHdr.l1_size); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Size = {0}", l2Size); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.sectors = {0}", imageInfo.Sectors); BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian; @@ -234,8 +232,8 @@ namespace DiscImageChef.DiscImages for(long i = 0; i < l1Table.LongLength; i++) l1Table[i] = BigEndianBitConverter.ToUInt64(l1TableB, (int)(i * 8)); - l1Mask = 0; - int c = 0; + l1Mask = 0; + int c = 0; l1Shift = (int)(l2Bits + qHdr.cluster_bits); for(int i = 0; i < 64; i++) @@ -248,17 +246,17 @@ namespace DiscImageChef.DiscImages c++; } - l2Mask = 0; + l2Mask = 0; for(int i = 0; i < l2Bits; i++) l2Mask = (l2Mask << 1) + 1; l2Mask <<= (int)qHdr.cluster_bits; - sectorMask = 0; + sectorMask = 0; for(int i = 0; i < qHdr.cluster_bits; i++) sectorMask = (sectorMask << 1) + 1; - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Mask = {0:X}", l1Mask); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Shift = {0}", l1Shift); - DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Mask = {0:X}", l2Mask); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Mask = {0:X}", l1Mask); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l1Shift = {0}", l1Shift); + DicConsole.DebugWriteLine("QCOW plugin", "qHdr.l2Mask = {0:X}", l2Mask); DicConsole.DebugWriteLine("QCOW plugin", "qHdr.sectorMask = {0:X}", sectorMask); maxL2TableCache = MAX_CACHE_SIZE / (l2Size * 8); @@ -266,22 +264,22 @@ namespace DiscImageChef.DiscImages imageStream = stream; - sectorCache = new Dictionary(); + sectorCache = new Dictionary(); l2TableCache = new Dictionary(); clusterCache = new Dictionary(); - imageInfo.CreationTime = imageFilter.GetCreationTime(); + imageInfo.CreationTime = imageFilter.GetCreationTime(); imageInfo.LastModificationTime = imageFilter.GetLastWriteTime(); - imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename()); - imageInfo.Sectors = qHdr.size / 512; - imageInfo.SectorSize = 512; - imageInfo.XmlMediaType = XmlMediaType.BlockMedia; - imageInfo.MediaType = MediaType.GENERIC_HDD; - imageInfo.ImageSize = qHdr.size; - imageInfo.Version = $"{qHdr.version}"; + imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename()); + imageInfo.Sectors = qHdr.size / 512; + imageInfo.SectorSize = 512; + imageInfo.XmlMediaType = XmlMediaType.BlockMedia; + imageInfo.MediaType = MediaType.GENERIC_HDD; + imageInfo.ImageSize = qHdr.size; + imageInfo.Version = $"{qHdr.version}"; - imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63); - imageInfo.Heads = 16; + imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63); + imageInfo.Heads = 16; imageInfo.SectorsPerTrack = 63; return true; @@ -311,7 +309,7 @@ namespace DiscImageChef.DiscImages { l2Table = new ulong[l2Size]; imageStream.Seek((long)(l1Table[l1Off] & QCOW_FLAGS_MASK), SeekOrigin.Begin); - byte[] l2TableB = new byte[l2Size * 8]; + byte[] l2TableB = new byte[l2Size * 8]; imageStream.Read(l2TableB, 0, l2Size * 8); DicConsole.DebugWriteLine("QCOW plugin", "Reading L2 table #{0}", l1Off); for(long i = 0; i < l2Table.LongLength; i++) @@ -337,12 +335,12 @@ namespace DiscImageChef.DiscImages ulong compSizeMask; ulong offMask; - compSizeMask = (ulong)(1 << (int)(qHdr.cluster_bits - 8)) - 1; - byte countbits = (byte)(qHdr.cluster_bits - 8); - compSizeMask <<= 62 - countbits; - offMask = ~compSizeMask & QCOW_FLAGS_MASK; + compSizeMask = (ulong)(1 << (int)(qHdr.cluster_bits - 8)) - 1; + byte countbits = (byte)(qHdr.cluster_bits - 8); + compSizeMask <<= 62 - countbits; + offMask = ~compSizeMask & QCOW_FLAGS_MASK; - ulong realOff = offset & offMask; + ulong realOff = offset & offMask; ulong compSize = (((offset & compSizeMask) >> (62 - countbits)) + 1) * 512; byte[] zCluster = new byte[compSize]; @@ -351,7 +349,7 @@ namespace DiscImageChef.DiscImages DeflateStream zStream = new DeflateStream(new MemoryStream(zCluster), CompressionMode.Decompress); - cluster = new byte[clusterSize]; + cluster = new byte[clusterSize]; int read = zStream.Read(cluster, 0, clusterSize); if(read != clusterSize) @@ -476,7 +474,7 @@ namespace DiscImageChef.DiscImages } public bool? VerifySectors(ulong sectorAddress, uint length, out List failingLbas, - out List unknownLbas) + out List unknownLbas) { failingLbas = new List(); unknownLbas = new List(); @@ -486,7 +484,7 @@ namespace DiscImageChef.DiscImages } public bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List failingLbas, - out List unknownLbas) + out List unknownLbas) { throw new FeatureUnsupportedImageException("Feature not supported by image format"); } @@ -496,6 +494,326 @@ namespace DiscImageChef.DiscImages return null; } + public IEnumerable SupportedMediaTags => new MediaTagType[] { }; + public IEnumerable SupportedSectorTags => new SectorTagType[] { }; + public IEnumerable SupportedMediaTypes => + new[] {MediaType.Unknown, MediaType.GENERIC_HDD}; + public IEnumerable<(string name, Type type, string description)> SupportedOptions => + new (string name, Type type, string description)[] { }; + public IEnumerable KnownExtensions => new[] {".qcow2", ".qc2", ".qcow3", ".qc3"}; + public bool IsWriting { get; private set; } + public string ErrorMessage { get; private set; } + + public bool Create(string path, MediaType mediaType, Dictionary options, ulong sectors, + uint sectorSize) + { + if(sectorSize != 512) + { + ErrorMessage = "Unsupported sector size"; + return false; + } + + if(!SupportedMediaTypes.Contains(mediaType)) + { + ErrorMessage = $"Unsupport media format {mediaType}"; + return false; + } + + // TODO: Correct this calculation + if(sectors * sectorSize / 65536 > uint.MaxValue) + { + ErrorMessage = "Too many sectors for selected cluster size"; + return false; + } + + imageInfo = new ImageInfo {MediaType = mediaType, SectorSize = sectorSize, Sectors = sectors}; + + try { writingStream = new FileStream(path, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None); } + catch(IOException e) + { + ErrorMessage = $"Could not create new image file, exception {e.Message}"; + return false; + } + + string extension = Path.GetExtension(path); + bool version3 = extension == ".qcow3" || extension == ".qc3"; + + qHdr = new QCow2Header + { + magic = QCOW_MAGIC, + version = version3 ? QCOW_VERSION3 : QCOW_VERSION2, + size = sectors * sectorSize, + cluster_bits = 16, + header_length = (uint)Marshal.SizeOf(typeof(QCow2Header)) + }; + + clusterSize = 1 << (int)qHdr.cluster_bits; + clusterSectors = 1 << ((int)qHdr.cluster_bits - 9); + l2Bits = (int)(qHdr.cluster_bits - 3); + l2Size = 1 << l2Bits; + + l1Mask = 0; + int c = 0; + l1Shift = (int)(l2Bits + qHdr.cluster_bits); + + for(int i = 0; i < 64; i++) + { + l1Mask <<= 1; + + if(c >= 64 - l1Shift) continue; + + l1Mask += 1; + c++; + } + + l2Mask = 0; + for(int i = 0; i < l2Bits; i++) l2Mask = (l2Mask << 1) + 1; + + l2Mask <<= (int)qHdr.cluster_bits; + + sectorMask = 0; + for(int i = 0; i < qHdr.cluster_bits; i++) sectorMask = (sectorMask << 1) + 1; + + qHdr.l1_size = (uint)(qHdr.size >> l1Shift); + if(qHdr.l1_size == 0) qHdr.l1_size = 1; + l1Table = new ulong[qHdr.l1_size]; + + ulong clusters = qHdr.size / (ulong)clusterSize; + ulong refCountBlocks = clusters * 2 / (ulong)clusterSize; + if(refCountBlocks == 0) refCountBlocks = 1; + + qHdr.refcount_table_offset = (ulong)clusterSize; + qHdr.refcount_table_clusters = + (uint)(refCountBlocks * 8 / (ulong)clusterSize); + if(qHdr.refcount_table_clusters == 0) qHdr.refcount_table_clusters = 1; + refCountTable = new ulong[refCountBlocks]; + qHdr.l1_table_offset = + qHdr.refcount_table_offset + (ulong)(qHdr.refcount_table_clusters * clusterSize); + ulong l1TableClusters = + qHdr.l1_size * 8 / (ulong)clusterSize; + if(l1TableClusters == 0) l1TableClusters = 1; + + byte[] empty = new byte[qHdr.l1_table_offset + l1TableClusters * (ulong)clusterSize]; + writingStream.Write(empty, 0, empty.Length); + + IsWriting = true; + ErrorMessage = null; + return true; + } + + public bool WriteMediaTag(byte[] data, MediaTagType tag) + { + ErrorMessage = "Writing media tags is not supported."; + return false; + } + + public bool WriteSector(byte[] data, ulong sectorAddress) + { + if(!IsWriting) + { + ErrorMessage = "Tried to write on a non-writable image"; + return false; + } + + if(data.Length != imageInfo.SectorSize) + { + ErrorMessage = "Incorrect data size"; + return false; + } + + if(sectorAddress >= imageInfo.Sectors) + { + ErrorMessage = "Tried to write past image size"; + return false; + } + + // Ignore empty sectors + if(ArrayHelpers.ArrayIsNullOrEmpty(data)) return true; + + ulong byteAddress = sectorAddress * 512; + + ulong l1Off = (byteAddress & l1Mask) >> l1Shift; + + if((long)l1Off >= l1Table.LongLength) + throw new ArgumentOutOfRangeException(nameof(l1Off), + $"Trying to write past L1 table, position {l1Off} of a max {l1Table.LongLength}"); + + if(l1Table[l1Off] == 0) + { + writingStream.Seek(0, SeekOrigin.End); + l1Table[l1Off] = (ulong)writingStream.Position; + byte[] l2TableB = new byte[l2Size * 8]; + writingStream.Seek(0, SeekOrigin.End); + writingStream.Write(l2TableB, 0, l2TableB.Length); + } + + writingStream.Position = (long)l1Table[l1Off]; + + ulong l2Off = (byteAddress & l2Mask) >> (int)qHdr.cluster_bits; + + writingStream.Seek((long)(l1Table[l1Off] + l2Off * 8), SeekOrigin.Begin); + + BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian; + + byte[] entry = new byte[8]; + writingStream.Read(entry, 0, 8); + ulong offset = BigEndianBitConverter.ToUInt64(entry, 0); + + if(offset == 0) + { + offset = (ulong)writingStream.Length; + byte[] cluster = new byte[clusterSize]; + entry = BigEndianBitConverter.GetBytes(offset); + writingStream.Seek((long)(l1Table[l1Off] + l2Off * 8), SeekOrigin.Begin); + writingStream.Write(entry, 0, 8); + writingStream.Seek(0, SeekOrigin.End); + writingStream.Write(cluster, 0, cluster.Length); + } + + writingStream.Seek((long)(offset + (byteAddress & sectorMask)), SeekOrigin.Begin); + writingStream.Write(data, 0, data.Length); + + int refCountBlockEntries = clusterSize * 8 / 16; + ulong refCountBlockIndex = offset / (ulong)clusterSize % (ulong)refCountBlockEntries; + ulong refCountTableIndex = offset / (ulong)clusterSize / (ulong)refCountBlockEntries; + + ulong refBlockOffset = refCountTable[refCountTableIndex]; + + if(refBlockOffset == 0) + { + refBlockOffset = (ulong)writingStream.Length; + refCountTable[refCountTableIndex] = refBlockOffset; + byte[] cluster = new byte[clusterSize]; + writingStream.Seek(0, SeekOrigin.End); + writingStream.Write(cluster, 0, cluster.Length); + } + + writingStream.Seek((long)(refBlockOffset + refCountBlockIndex), SeekOrigin.Begin); + writingStream.Write(new byte[] {0, 1}, 0, 2); + + ErrorMessage = ""; + return true; + } + + // TODO: This can be optimized + public bool WriteSectors(byte[] data, ulong sectorAddress, uint length) + { + if(!IsWriting) + { + ErrorMessage = "Tried to write on a non-writable image"; + return false; + } + + if(data.Length % imageInfo.SectorSize != 0) + { + ErrorMessage = "Incorrect data size"; + return false; + } + + if(sectorAddress + length > imageInfo.Sectors) + { + ErrorMessage = "Tried to write past image size"; + return false; + } + + // Ignore empty sectors + if(ArrayHelpers.ArrayIsNullOrEmpty(data)) return true; + + for(uint i = 0; i < length; i++) + { + byte[] tmp = new byte[imageInfo.SectorSize]; + Array.Copy(data, i * imageInfo.SectorSize, tmp, 0, imageInfo.SectorSize); + if(!WriteSector(tmp, sectorAddress + i)) return false; + } + + ErrorMessage = ""; + return true; + } + + public bool WriteSectorLong(byte[] data, ulong sectorAddress) + { + ErrorMessage = "Writing sectors with tags is not supported."; + return false; + } + + public bool WriteSectorsLong(byte[] data, ulong sectorAddress, uint length) + { + ErrorMessage = "Writing sectors with tags is not supported."; + return false; + } + + public bool SetTracks(List tracks) + { + ErrorMessage = "Unsupported feature"; + return false; + } + + public bool Close() + { + if(!IsWriting) + { + ErrorMessage = "Image is not opened for writing"; + return false; + } + + BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian; + writingStream.Seek(0, SeekOrigin.Begin); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.magic), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.version), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.backing_file_offset), 0, 8); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.backing_file_size), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.cluster_bits), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.size), 0, 8); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.crypt_method), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.l1_size), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.l1_table_offset), 0, 8); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.refcount_table_offset), 0, 8); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.refcount_table_clusters), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.nb_snapshots), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.snapshots_offset), 0, 8); + if(qHdr.version == QCOW_VERSION3) + { + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.features), 0, 8); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.compat_features), 0, 8); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.autoclear_features), 0, 8); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.refcount_order), 0, 4); + writingStream.Write(BigEndianBitConverter.GetBytes(qHdr.header_length), 0, 4); + } + + writingStream.Seek((long)qHdr.refcount_table_offset, SeekOrigin.Begin); + for(long i = 0; i < refCountTable.LongLength; i++) + writingStream.Write(BigEndianBitConverter.GetBytes(refCountTable[i]), 0, 8); + + writingStream.Seek((long)qHdr.l1_table_offset, SeekOrigin.Begin); + for(long i = 0; i < l1Table.LongLength; i++) + writingStream.Write(BigEndianBitConverter.GetBytes(l1Table[i]), 0, 8); + + return true; + } + + public bool SetMetadata(ImageInfo metadata) + { + return true; + } + + public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack) + { + // Not stored in image + return true; + } + + public bool WriteSectorTag(byte[] data, ulong sectorAddress, SectorTagType tag) + { + ErrorMessage = "Writing sectors with tags is not supported."; + return false; + } + + public bool WriteSectorsTag(byte[] data, ulong sectorAddress, uint length, SectorTagType tag) + { + ErrorMessage = "Writing sectors with tags is not supported."; + return false; + } + /// /// QCOW header, big-endian /// @@ -559,8 +877,8 @@ namespace DiscImageChef.DiscImages public ulong features; public ulong compat_features; public ulong autoclear_features; - public uint refcount_order; - public uint header_length; + public uint refcount_order; + public uint header_length; } } } \ No newline at end of file