private bool HandleFilesystemEntry(Snapshots.ISnapshotService snapshot, BackendManager backend, string path, System.IO.FileAttributes attributes)
{
// If we lost the connection, there is no point in keeping on processing
if (backend.HasDied)
throw backend.LastException;
try
{
m_result.OperationProgressUpdater.StartFile(path, -1);
if (m_backendLogFlushTimer < DateTime.Now)
{
m_backendLogFlushTimer = DateTime.Now.Add(FLUSH_TIMESPAN);
backend.FlushDbMessages(m_database, null);
}
DateTime lastwrite = new DateTime(0, DateTimeKind.Utc);
try
{
lastwrite = snapshot.GetLastWriteTimeUtc(path);
}
catch (Exception ex)
{
m_result.AddWarning(string.Format("Failed to read timestamp on \"{0}\"", path), ex);
}
if ((attributes & FileAttributes.ReparsePoint) == FileAttributes.ReparsePoint)
{
if (m_options.SymlinkPolicy == Options.SymlinkStrategy.Ignore)
{
m_result.AddVerboseMessage("Ignoring symlink {0}", path);
return false;
}
if (m_options.SymlinkPolicy == Options.SymlinkStrategy.Store)
{
Dictionary<string, string> metadata = GenerateMetadata(snapshot, path, attributes);
if (!metadata.ContainsKey("CoreSymlinkTarget"))
{
var p = snapshot.GetSymlinkTarget(path);
if (string.IsNullOrWhiteSpace(p))
m_result.AddVerboseMessage("Ignoring empty symlink {0}", path);
else
metadata["CoreSymlinkTarget"] = p;
}
var metahash = Utility.WrapMetadata(metadata, m_options);
AddSymlinkToOutput(backend, path, DateTime.UtcNow, metahash);
m_result.AddVerboseMessage("Stored symlink {0}", path);
//Do not recurse symlinks
return false;
}
}
if ((attributes & FileAttributes.Directory) == FileAttributes.Directory)
{
IMetahash metahash;
if (m_options.StoreMetadata)
{
metahash = Utility.WrapMetadata(GenerateMetadata(snapshot, path, attributes), m_options);
}
else
{
metahash = EMPTY_METADATA;
}
m_result.AddVerboseMessage("Adding directory {0}", path);
AddFolderToOutput(backend, path, lastwrite, metahash);
return true;
}
m_result.OperationProgressUpdater.UpdatefilesProcessed(++m_result.ExaminedFiles, m_result.SizeOfExaminedFiles);
bool changed = false;
// Last scan time
DateTime oldModified;
long lastFileSize = -1;
string oldMetahash;
long oldMetasize;
var oldId = m_database.GetFileEntry(path, out oldModified, out lastFileSize, out oldMetahash, out oldMetasize);
long filestatsize = -1;
try { filestatsize = snapshot.GetFileSize(path); }
catch { }
IMetahash metahashandsize = m_options.StoreMetadata ? Utility.WrapMetadata(GenerateMetadata(snapshot, path, attributes), m_options) : EMPTY_METADATA;
var timestampChanged = lastwrite != oldModified || lastwrite.Ticks == 0 || oldModified.Ticks == 0;
var filesizeChanged = filestatsize < 0 || lastFileSize < 0 || filestatsize != lastFileSize;
var tooLargeFile = m_options.SkipFilesLargerThan != long.MaxValue && m_options.SkipFilesLargerThan != 0 && filestatsize >= 0 && filestatsize > m_options.SkipFilesLargerThan;
var metadatachanged = !m_options.SkipMetadata && (metahashandsize.Size != oldMetasize || metahashandsize.Hash != oldMetahash);
if ((oldId < 0 || m_options.DisableFiletimeCheck || timestampChanged || filesizeChanged || metadatachanged) && !tooLargeFile)
{
m_result.AddVerboseMessage("Checking file for changes {0}, new: {1}, timestamp changed: {2}, size changed: {3}, metadatachanged: {4}, {5} vs {6}", path, oldId <= 0, timestampChanged, filesizeChanged, metadatachanged, lastwrite, oldModified);
m_result.OpenedFiles++;
long filesize = 0;
var hint = m_options.GetCompressionHintFromFilename(path);
var oldHash = oldId < 0 ? null : m_database.GetFileHash(oldId);
using (var blocklisthashes = new Library.Utility.FileBackedStringList())
using (var hashcollector = new Library.Utility.FileBackedStringList())
{
using (var fs = new Blockprocessor(snapshot.OpenRead(path), m_blockbuffer))
{
try { m_result.OperationProgressUpdater.StartFile(path, fs.Length); }
catch (Exception ex) { m_result.AddWarning(string.Format("Failed to read file length for file {0}", path), ex); }
int blocklistoffset = 0;
m_filehasher.Initialize();
var offset = 0;
var remaining = fs.Readblock();
do
{
var size = Math.Min(m_blocksize, remaining);
m_filehasher.TransformBlock(m_blockbuffer, offset, size, m_blockbuffer, offset);
var blockkey = m_blockhasher.ComputeHash(m_blockbuffer, offset, size);
if (m_blocklistbuffer.Length - blocklistoffset < blockkey.Length)
{
var blkey = Convert.ToBase64String(m_blockhasher.ComputeHash(m_blocklistbuffer, 0, blocklistoffset));
blocklisthashes.Add(blkey);
AddBlockToOutput(backend, blkey, m_blocklistbuffer, 0, blocklistoffset, CompressionHint.Noncompressible, true);
blocklistoffset = 0;
}
Array.Copy(blockkey, 0, m_blocklistbuffer, blocklistoffset, blockkey.Length);
blocklistoffset += blockkey.Length;
var key = Convert.ToBase64String(blockkey);
AddBlockToOutput(backend, key, m_blockbuffer, offset, size, hint, false);
hashcollector.Add(key);
filesize += size;
m_result.OperationProgressUpdater.UpdateFileProgress(filesize);
if (m_result.TaskControlRendevouz() == TaskControlState.Stop)
return false;
remaining -= size;
offset += size;
if (remaining == 0)
{
offset = 0;
remaining = fs.Readblock();
}
} while (remaining > 0);
//If all fits in a single block, don't bother with blocklists
if (hashcollector.Count > 1)
{
var blkeyfinal = Convert.ToBase64String(m_blockhasher.ComputeHash(m_blocklistbuffer, 0, blocklistoffset));
blocklisthashes.Add(blkeyfinal);
AddBlockToOutput(backend, blkeyfinal, m_blocklistbuffer, 0, blocklistoffset, CompressionHint.Noncompressible, true);
}
}
m_result.SizeOfOpenedFiles += filesize;
m_filehasher.TransformFinalBlock(m_blockbuffer, 0, 0);
var filekey = Convert.ToBase64String(m_filehasher.Hash);
if (oldHash != filekey)
{
if (oldHash == null)
m_result.AddVerboseMessage("New file {0}", path);
else
m_result.AddVerboseMessage("File has changed {0}", path);
if (oldId < 0)
{
m_result.AddedFiles++;
m_result.SizeOfAddedFiles += filesize;
if (m_options.Dryrun)
m_result.AddDryrunMessage(string.Format("Would add new file {0}, size {1}", path, Library.Utility.Utility.FormatSizeString(filesize)));
}
else
{
m_result.ModifiedFiles++;
m_result.SizeOfModifiedFiles += filesize;
if (m_options.Dryrun)
m_result.AddDryrunMessage(string.Format("Would add changed file {0}, size {1}", path, Library.Utility.Utility.FormatSizeString(filesize)));
}
AddFileToOutput(backend, path, filesize, lastwrite, metahashandsize, hashcollector, filekey, blocklisthashes);
changed = true;
}
else if (metadatachanged)
{
m_result.AddVerboseMessage("File has only metadata changes {0}", path);
AddFileToOutput(backend, path, filesize, lastwrite, metahashandsize, hashcollector, filekey, blocklisthashes);
changed = true;
}
else
{
// When we write the file to output, update the last modified time
oldModified = lastwrite;
m_result.AddVerboseMessage("File has not changed {0}", path);
}
}
}
else
{
if (m_options.SkipFilesLargerThan == long.MaxValue || m_options.SkipFilesLargerThan == 0 || snapshot.GetFileSize(path) < m_options.SkipFilesLargerThan)
m_result.AddVerboseMessage("Skipped checking file, because timestamp was not updated {0}", path);
else
m_result.AddVerboseMessage("Skipped checking file, because the size exceeds limit {0}", path);
}
if (!changed)
AddUnmodifiedFile(oldId, lastwrite);
m_result.SizeOfExaminedFiles += filestatsize;
if (filestatsize != 0)
m_result.OperationProgressUpdater.UpdatefilesProcessed(m_result.ExaminedFiles, m_result.SizeOfExaminedFiles);
}
catch (Exception ex)
{
m_result.AddWarning(string.Format("Failed to process path: {0}", path), ex);
m_result.FilesWithError++;
}
return true;
}
