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|
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.IO;
using System.Linq.Expressions;
namespace Duplicati.Library.Main.Database
{
internal class LocalBackupDatabase : LocalDatabase
{
/// <summary>
/// The tag used for logging
/// </summary>
private static readonly string LOGTAG = Logging.Log.LogTagFromType<LocalBackupDatabase>();
private readonly System.Data.IDbCommand m_findblockCommand;
private readonly System.Data.IDbCommand m_findblocksetCommand;
private readonly System.Data.IDbCommand m_findfilesetCommand;
private readonly System.Data.IDbCommand m_findmetadatasetCommand;
private readonly System.Data.IDbCommand m_insertblockCommand;
private readonly System.Data.IDbCommand m_insertfileCommand;
private readonly System.Data.IDbCommand m_insertblocksetCommand;
private readonly System.Data.IDbCommand m_insertblocksetentryFastCommand;
private readonly System.Data.IDbCommand m_insertblocksetentryCommand;
private readonly System.Data.IDbCommand m_insertblocklistHashesCommand;
private readonly System.Data.IDbCommand m_insertmetadatasetCommand;
private readonly System.Data.IDbCommand m_findfileCommand;
private readonly System.Data.IDbCommand m_selectfilelastmodifiedCommand;
private readonly System.Data.IDbCommand m_selectfilelastmodifiedWithSizeCommand;
private readonly System.Data.IDbCommand m_selectfileHashCommand;
private readonly System.Data.IDbCommand m_selectblocklistHashesCommand;
private readonly System.Data.IDbCommand m_insertfileOperationCommand;
private readonly System.Data.IDbCommand m_selectfilemetadatahashandsizeCommand;
private Dictionary<string, long> m_blockCache;
private long m_filesetId;
private readonly bool m_logQueries;
public LocalBackupDatabase(string path, Options options)
: this(new LocalDatabase(path, "Backup", false), options)
{
this.ShouldCloseConnection = true;
}
public LocalBackupDatabase(LocalDatabase db, Options options)
: base(db)
{
m_logQueries = options.ProfileAllDatabaseQueries;
m_findblockCommand = m_connection.CreateCommand();
m_insertblockCommand = m_connection.CreateCommand();
m_insertfileCommand = m_connection.CreateCommand();
m_insertblocksetCommand = m_connection.CreateCommand();
m_insertmetadatasetCommand = m_connection.CreateCommand();
m_findblocksetCommand = m_connection.CreateCommand();
m_findmetadatasetCommand = m_connection.CreateCommand();
m_findfilesetCommand = m_connection.CreateCommand();
m_insertblocksetentryCommand = m_connection.CreateCommand();
m_insertblocklistHashesCommand = m_connection.CreateCommand();
m_selectblocklistHashesCommand = m_connection.CreateCommand();
m_insertfileOperationCommand = m_connection.CreateCommand();
m_findfileCommand = m_connection.CreateCommand();
m_selectfilelastmodifiedCommand = m_connection.CreateCommand();
m_selectfilelastmodifiedWithSizeCommand = m_connection.CreateCommand();
m_selectfileHashCommand = m_connection.CreateCommand();
m_insertblocksetentryFastCommand = m_connection.CreateCommand();
m_selectfilemetadatahashandsizeCommand = m_connection.CreateCommand();
m_findblockCommand.CommandText = @"SELECT ""ID"" FROM ""Block"" WHERE ""Hash"" = ? AND ""Size"" = ?";
m_findblockCommand.AddParameters(2);
m_findblocksetCommand.CommandText = @"SELECT ""ID"" FROM ""Blockset"" WHERE ""Fullhash"" = ? AND ""Length"" = ?";
m_findblocksetCommand.AddParameters(2);
m_findmetadatasetCommand.CommandText = @"SELECT ""A"".""ID"" FROM ""Metadataset"" A, ""BlocksetEntry"" B, ""Block"" C WHERE ""A"".""BlocksetID"" = ""B"".""BlocksetID"" AND ""B"".""BlockID"" = ""C"".""ID"" AND ""C"".""Hash"" = ? AND ""C"".""Size"" = ?";
m_findmetadatasetCommand.AddParameters(2);
m_findfilesetCommand.CommandText = @"SELECT ""ID"" FROM ""FileLookup"" WHERE ""BlocksetID"" = ? AND ""MetadataID"" = ? AND ""Path"" = ? AND ""PrefixID"" = ?";
m_findfilesetCommand.AddParameters(4);
m_insertblockCommand.CommandText = @"INSERT INTO ""Block"" (""Hash"", ""VolumeID"", ""Size"") VALUES (?, ?, ?); SELECT last_insert_rowid();";
m_insertblockCommand.AddParameters(3);
m_insertfileOperationCommand.CommandText = @"INSERT INTO ""FilesetEntry"" (""FilesetID"", ""FileID"", ""Lastmodified"") VALUES (?, ?, ?)";
m_insertfileOperationCommand.AddParameters(3);
m_insertfileCommand.CommandText = @"INSERT INTO ""FileLookup"" (""PrefixID"", ""Path"",""BlocksetID"", ""MetadataID"") VALUES (?, ?, ? ,?); SELECT last_insert_rowid();";
m_insertfileCommand.AddParameters(4);
m_insertblocksetCommand.CommandText = @"INSERT INTO ""Blockset"" (""Length"", ""FullHash"") VALUES (?, ?); SELECT last_insert_rowid();";
m_insertblocksetCommand.AddParameters(2);
m_insertblocksetentryFastCommand.CommandText = @"INSERT INTO ""BlocksetEntry"" (""BlocksetID"", ""Index"", ""BlockID"") VALUES (?,?,?)";
m_insertblocksetentryFastCommand.AddParameters(3);
m_insertblocksetentryCommand.CommandText = @"INSERT INTO ""BlocksetEntry"" (""BlocksetID"", ""Index"", ""BlockID"") SELECT ? AS A, ? AS B, ""ID"" FROM ""Block"" WHERE ""Hash"" = ? AND ""Size"" = ?";
m_insertblocksetentryCommand.AddParameters(4);
m_insertblocklistHashesCommand.CommandText = @"INSERT INTO ""BlocklistHash"" (""BlocksetID"", ""Index"", ""Hash"") VALUES (?, ?, ?)";
m_insertblocklistHashesCommand.AddParameters(3);
m_insertmetadatasetCommand.CommandText = @"INSERT INTO ""Metadataset"" (""BlocksetID"") VALUES (?); SELECT last_insert_rowid();";
m_insertmetadatasetCommand.AddParameter();
m_selectfilelastmodifiedCommand.CommandText = @"SELECT ""A"".""ID"", ""B"".""LastModified"" FROM (SELECT ""ID"" FROM ""FileLookup"" WHERE ""PrefixID"" = ? AND ""Path"" = ?) ""A"" CROSS JOIN ""FilesetEntry"" ""B"" WHERE ""A"".""ID"" = ""B"".""FileID"" AND ""B"".""FilesetID"" = ?";
m_selectfilelastmodifiedCommand.AddParameters(3);
m_selectfilelastmodifiedWithSizeCommand.CommandText = @"SELECT ""C"".""ID"", ""C"".""LastModified"", ""D"".""Length"" FROM (SELECT ""A"".""ID"", ""B"".""LastModified"", ""A"".""BlocksetID"" FROM (SELECT ""ID"", ""BlocksetID"" FROM ""FileLookup"" WHERE ""PrefixID"" = ? AND ""Path"" = ?) ""A"" CROSS JOIN ""FilesetEntry"" ""B"" WHERE ""A"".""ID"" = ""B"".""FileID"" AND ""B"".""FilesetID"" = ?) AS ""C"", ""Blockset"" AS ""D"" WHERE ""C"".""BlocksetID"" == ""D"".""ID"" ";
m_selectfilelastmodifiedWithSizeCommand.AddParameters(3);
m_selectfilemetadatahashandsizeCommand.CommandText = @"SELECT ""Blockset"".""Length"", ""Blockset"".""FullHash"" FROM ""Blockset"", ""Metadataset"", ""File"" WHERE ""File"".""ID"" = ? AND ""Blockset"".""ID"" = ""Metadataset"".""BlocksetID"" AND ""Metadataset"".""ID"" = ""File"".""MetadataID"" ";
m_selectfilemetadatahashandsizeCommand.AddParameters(1);
// Allow users to test on real-world data
// to get feedback on potential performance
int.TryParse(Environment.GetEnvironmentVariable("TEST_QUERY_VERSION"), out var testqueryversion);
if (testqueryversion != 0)
Logging.Log.WriteWarningMessage(LOGTAG, "TestFileQuery", null, "Using performance test query version {0} as the TEST_QUERY_VERSION environment variable is set", testqueryversion);
// The original query (v==1) finds the most recent entry of the file in question,
// but it requires some large joins to extract the required information.
// To speed it up, we use a slightly simpler approach that only looks at the
// previous fileset, and uses information here.
// If there is a case where a file is sometimes there and sometimes not
// (i.e. filter file, remove filter) we will not find the file.
// We currently use this faster version,
// but allow users to switch back via an environment variable
// such that we can get performance feedback
switch (testqueryversion)
{
// The query used in Duplicati until 2.0.3.9
case 1:
m_findfileCommand.CommandText =
@" SELECT ""FileLookup"".""ID"" AS ""FileID"", ""FilesetEntry"".""Lastmodified"", ""FileBlockset"".""Length"", ""MetaBlockset"".""Fullhash"" AS ""Metahash"", ""MetaBlockset"".""Length"" AS ""Metasize"" " +
@" FROM ""FileLookup"", ""FilesetEntry"", ""Fileset"", ""Blockset"" ""FileBlockset"", ""Metadataset"", ""Blockset"" ""MetaBlockset"" " +
@" WHERE ""FileLookup"".""PrefixID"" = ? AND ""FileLookup"".""Path"" = ? " +
@" AND ""FilesetEntry"".""FileID"" = ""FileLookup"".""ID"" AND ""Fileset"".""ID"" = ""FilesetEntry"".""FilesetID"" " +
@" AND ""FileBlockset"".""ID"" = ""FileLookup"".""BlocksetID"" " +
@" AND ""Metadataset"".""ID"" = ""FileLookup"".""MetadataID"" AND ""MetaBlockset"".""ID"" = ""Metadataset"".""BlocksetID"" " +
@" AND ? IS NOT NULL" +
@" ORDER BY ""Fileset"".""Timestamp"" DESC " +
@" LIMIT 1 ";
break;
// The fastest reported query in Duplicati 2.0.3.10, but with "LIMIT 1" added
default:
case 2:
var getLastFileEntryForPath =
@"SELECT ""A"".""ID"", ""B"".""LastModified"", ""A"".""BlocksetID"", ""A"".""MetadataID"" " +
@" FROM (SELECT ""ID"", ""BlocksetID"", ""MetadataID"" FROM ""FileLookup"" WHERE ""PrefixID"" = ? AND ""Path"" = ?) ""A"" " +
@" CROSS JOIN ""FilesetEntry"" ""B"" " +
@" WHERE ""A"".""ID"" = ""B"".""FileID"" " +
@" AND ""B"".""FilesetID"" = ? ";
m_findfileCommand.CommandText = string.Format(
@"SELECT ""C"".""ID"" AS ""FileID"", ""C"".""LastModified"", ""D"".""Length"", ""E"".""FullHash"" as ""Metahash"", ""E"".""Length"" AS ""Metasize"" " +
@" FROM " +
@" ({0}) AS ""C"", ""Blockset"" AS ""D"", ""Blockset"" AS ""E"", ""Metadataset"" ""F"" " +
@" WHERE ""C"".""BlocksetID"" == ""D"".""ID"" AND ""C"".""MetadataID"" == ""F"".""ID"" AND ""F"".""BlocksetID"" = ""E"".""ID"" " +
@" LIMIT 1",
getLastFileEntryForPath
);
break;
// Potentially faster query: https://forum.duplicati.com/t/release-2-0-3-10-canary-2018-08-30/4497/25
case 3:
m_findfileCommand.CommandText =
@" SELECT FileLookup.ID as FileID, FilesetEntry.Lastmodified, FileBlockset.Length, " +
@" MetaBlockset.FullHash AS Metahash, MetaBlockset.Length as Metasize " +
@" FROM FilesetEntry " +
@"INNER JOIN Fileset ON (FileSet.ID = FilesetEntry.FilesetID) " +
@"INNER JOIN FileLookup ON (FileLookup.ID = FilesetEntry.FileID) " +
@"INNER JOIN Metadataset ON (Metadataset.ID = FileLookup.MetadataID) " +
@"INNER JOIN Blockset AS MetaBlockset ON (MetaBlockset.ID = Metadataset.BlocksetID) " +
@" LEFT JOIN Blockset AS FileBlockset ON (FileBlockset.ID = FileLookup.BlocksetID) " +
@" WHERE FileLookup.PrefixID = ? AND FileLookup.Path = ? AND FilesetID = ? " +
@" LIMIT 1 ";
break;
// The slow query used in Duplicati 2.0.3.10, but with "LIMIT 1" added
case 4:
m_findfileCommand.CommandText =
@" SELECT ""FileLookup"".""ID"" AS ""FileID"", ""FilesetEntry"".""Lastmodified"", ""FileBlockset"".""Length"", ""MetaBlockset"".""Fullhash"" AS ""Metahash"", ""MetaBlockset"".""Length"" AS ""Metasize"" " +
@" FROM ""FileLookup"", ""FilesetEntry"", ""Fileset"", ""Blockset"" ""FileBlockset"", ""Metadataset"", ""Blockset"" ""MetaBlockset"" " +
@" WHERE ""FileLookup"".""PrefixID"" = ? AND ""FileLookup"".""Path"" = ? " +
@" AND ""Fileset"".""ID"" = ? " +
@" AND ""FilesetEntry"".""FileID"" = ""FileLookup"".""ID"" AND ""Fileset"".""ID"" = ""FilesetEntry"".""FilesetID"" " +
@" AND ""FileBlockset"".""ID"" = ""FileLookup"".""BlocksetID"" " +
@" AND ""Metadataset"".""ID"" = ""FileLookup"".""MetadataID"" AND ""MetaBlockset"".""ID"" = ""Metadataset"".""BlocksetID"" " +
@" LIMIT 1 ";
break;
}
m_findfileCommand.AddParameters(3);
m_selectfileHashCommand.CommandText = @"SELECT ""Blockset"".""Fullhash"" FROM ""Blockset"", ""FileLookup"" WHERE ""Blockset"".""ID"" = ""FileLookup"".""BlocksetID"" AND ""FileLookup"".""ID"" = ? ";
m_selectfileHashCommand.AddParameters(1);
m_selectblocklistHashesCommand.CommandText = @"SELECT ""Hash"" FROM ""BlocklistHash"" WHERE ""BlocksetID"" = ? ORDER BY ""Index"" ASC ";
m_selectblocklistHashesCommand.AddParameters(1);
}
/// <summary>
/// Probes to see if a block already exists
/// </summary>
/// <param name="key">The block key</param>
/// <param name="size">The size of the block</param>
/// <returns>True if the block should be added to the current output</returns>
public long FindBlockID(string key, long size, System.Data.IDbTransaction transaction = null)
{
m_findblockCommand.Transaction = transaction;
m_findblockCommand.SetParameterValue(0, key);
m_findblockCommand.SetParameterValue(1, size);
return m_findblockCommand.ExecuteScalarInt64(m_logQueries, -1);
}
/// <summary>
/// Adds a block to the local database, returning a value indicating if the value presents a new block
/// </summary>
/// <param name="key">The block key</param>
/// <param name="size">The size of the block</param>
/// <returns>True if the block should be added to the current output</returns>
public bool AddBlock(string key, long size, long volumeid, System.Data.IDbTransaction transaction = null)
{
long exsize;
if (m_blockCache != null && m_blockCache.TryGetValue(key, out exsize))
{
if (exsize == size)
return false;
Logging.Log.WriteWarningMessage(LOGTAG, "HashCollisionsFound", null, "Found hash collision on {0}, sizes {1} vs {2}. Disabling cache from now on.", key, size, exsize);
m_blockCache = null;
}
m_findblockCommand.Transaction = transaction;
m_findblockCommand.SetParameterValue(0, key);
m_findblockCommand.SetParameterValue(1, size);
var r = m_findblockCommand.ExecuteScalarInt64(m_logQueries, -1);
if (r == -1L)
{
m_insertblockCommand.Transaction = transaction;
m_insertblockCommand.SetParameterValue(0, key);
m_insertblockCommand.SetParameterValue(1, volumeid);
m_insertblockCommand.SetParameterValue(2, size);
m_insertblockCommand.ExecuteScalarInt64(m_logQueries);
if (m_blockCache != null)
m_blockCache.Add(key, size);
return true;
}
else
{
//Update lookup cache if required
return false;
}
}
/// <summary>
/// Adds a blockset to the database, returns a value indicating if the blockset is new
/// </summary>
/// <param name="filehash">The hash of the blockset</param>
/// <param name="size">The size of the blockset</param>
/// <param name="hashes">The list of hashes</param>
/// <param name="blocksetid">The id of the blockset, new or old</param>
/// <returns>True if the blockset was created, false otherwise</returns>
public bool AddBlockset(string filehash, long size, int blocksize, IEnumerable<string> hashes, IEnumerable<string> blocklistHashes, out long blocksetid, System.Data.IDbTransaction transaction = null)
{
m_findblocksetCommand.Transaction = transaction;
blocksetid = m_findblocksetCommand.ExecuteScalarInt64(m_logQueries, null, -1, filehash, size);
if (blocksetid != -1)
return false; //Found it
using (var tr = new TemporaryTransactionWrapper(m_connection, transaction))
{
m_insertblocksetCommand.Transaction = tr.Parent;
m_insertblocksetCommand.SetParameterValue(0, size);
m_insertblocksetCommand.SetParameterValue(1, filehash);
blocksetid = m_insertblocksetCommand.ExecuteScalarInt64(m_logQueries);
long ix = 0;
if (blocklistHashes != null)
{
m_insertblocklistHashesCommand.SetParameterValue(0, blocksetid);
m_insertblocklistHashesCommand.Transaction = tr.Parent;
foreach (var bh in blocklistHashes)
{
m_insertblocklistHashesCommand.SetParameterValue(1, ix);
m_insertblocklistHashesCommand.SetParameterValue(2, bh);
m_insertblocklistHashesCommand.ExecuteNonQuery(m_logQueries);
ix++;
}
}
m_insertblocksetentryCommand.SetParameterValue(0, blocksetid);
m_insertblocksetentryCommand.Transaction = tr.Parent;
m_insertblocksetentryFastCommand.SetParameterValue(0, blocksetid);
m_insertblocksetentryFastCommand.Transaction = tr.Parent;
ix = 0;
long remainsize = size;
foreach (var h in hashes)
{
var exsize = remainsize < blocksize ? remainsize : blocksize;
m_insertblocksetentryCommand.SetParameterValue(1, ix);
m_insertblocksetentryCommand.SetParameterValue(2, h);
m_insertblocksetentryCommand.SetParameterValue(3, exsize);
var c = m_insertblocksetentryCommand.ExecuteNonQuery(m_logQueries);
if (c != 1)
{
Logging.Log.WriteErrorMessage(LOGTAG, "CheckingErrorsForIssue1400", null, "Checking errors, related to #1400. Unexpected result count: {0}, expected {1}, hash: {2}, size: {3}, blocksetid: {4}, ix: {5}, fullhash: {6}, fullsize: {7}", c, 1, h, exsize, blocksetid, ix, filehash, size);
using (var cmd = m_connection.CreateCommand(tr.Parent))
{
var bid = cmd.ExecuteScalarInt64(@"SELECT ""ID"" FROM ""Block"" WHERE ""Hash"" = ?", -1, h);
if (bid == -1)
throw new Exception(string.Format("Could not find any blocks with the given hash: {0}", h));
foreach (var rd in cmd.ExecuteReaderEnumerable(@"SELECT ""Size"" FROM ""Block"" WHERE ""Hash"" = ?", h))
Logging.Log.WriteErrorMessage(LOGTAG, "FoundIssue1400Error", null, "Found block with ID {0} and hash {1} and size {2}", bid, h, rd.ConvertValueToInt64(0, -1));
}
throw new Exception(string.Format("Unexpected result count: {0}, expected {1}, check log for more messages", c, 1));
}
ix++;
remainsize -= blocksize;
}
tr.Commit();
}
return true;
}
/// <summary>
/// Gets the metadataset ID from the filehash
/// </summary>
/// <returns><c>true</c>, if metadataset found, false if does not exist.</returns>
/// <param name="filehash">The metadata hash.</param>
/// <param name="size">The size of the metadata.</param>
/// <param name="metadataid">The ID of the metadataset.</param>
/// <param name="transaction">An optional transaction.</param>
public bool GetMetadatasetID(string filehash, long size, out long metadataid, System.Data.IDbTransaction transaction = null)
{
if (size > 0)
{
m_findmetadatasetCommand.Transaction = transaction;
metadataid = m_findmetadatasetCommand.ExecuteScalarInt64(m_logQueries, null, -1, filehash, size);
return metadataid != -1;
}
metadataid = -2;
return false;
}
/// <summary>
/// Adds a metadata set to the database, and returns a value indicating if the record was new
/// </summary>
/// <param name="filehash">The metadata hash</param>
/// <param name="size">The size of the metadata</param>
/// <param name="transaction">The transaction to execute under</param>
/// <param name="blocksetid">The id of the blockset to add</param>
/// <param name="metadataid">The id of the metadata set</param>
/// <returns>True if the set was added to the database, false otherwise</returns>
public bool AddMetadataset(string filehash, long size, long blocksetid, out long metadataid, System.Data.IDbTransaction transaction = null)
{
if (GetMetadatasetID(filehash, size, out metadataid, transaction))
return false;
using (var tr = new TemporaryTransactionWrapper(m_connection, transaction))
{
m_insertmetadatasetCommand.Transaction = tr.Parent;
m_insertmetadatasetCommand.SetParameterValue(0, blocksetid);
metadataid = m_insertmetadatasetCommand.ExecuteScalarInt64(m_logQueries);
tr.Commit();
return true;
}
}
/// <summary>
/// Adds a file record to the database
/// </summary>
/// <param name="pathprefixid">The path prefix ID</param>
/// <param name="filename">The path to the file</param>
/// <param name="lastmodified">The time the file was modified</param>
/// <param name="blocksetID">The ID of the hashkey for the file</param>
/// <param name="metadataID">The ID for the metadata</param>
/// <param name="transaction">The transaction to use for insertion, or null for no transaction</param>
public void AddFile(long pathprefixid, string filename, DateTime lastmodified, long blocksetID, long metadataID, System.Data.IDbTransaction transaction)
{
var fileidobj = -1L;
m_findfilesetCommand.Transaction = transaction;
m_findfilesetCommand.SetParameterValue(0, blocksetID);
m_findfilesetCommand.SetParameterValue(1, metadataID);
m_findfilesetCommand.SetParameterValue(2, filename);
m_findfilesetCommand.SetParameterValue(3, pathprefixid);
fileidobj = m_findfilesetCommand.ExecuteScalarInt64(m_logQueries);
if (fileidobj == -1)
{
using (var tr = new TemporaryTransactionWrapper(m_connection, transaction))
{
m_insertfileCommand.Transaction = tr.Parent;
m_insertfileCommand.SetParameterValue(0, pathprefixid);
m_insertfileCommand.SetParameterValue(1, filename);
m_insertfileCommand.SetParameterValue(2, blocksetID);
m_insertfileCommand.SetParameterValue(3, metadataID);
fileidobj = m_insertfileCommand.ExecuteScalarInt64(m_logQueries);
tr.Commit();
}
}
m_insertfileOperationCommand.Transaction = transaction;
m_insertfileOperationCommand.SetParameterValue(0, m_filesetId);
m_insertfileOperationCommand.SetParameterValue(1, fileidobj);
m_insertfileOperationCommand.SetParameterValue(2, lastmodified.ToUniversalTime().Ticks);
m_insertfileOperationCommand.ExecuteNonQuery(m_logQueries);
}
/// <summary>
/// Adds a file record to the database
/// </summary>
/// <param name="filename">The path to the file</param>
/// <param name="lastmodified">The time the file was modified</param>
/// <param name="blocksetID">The ID of the hashkey for the file</param>
/// <param name="metadataID">The ID for the metadata</param>
/// <param name="transaction">The transaction to use for insertion, or null for no transaction</param>
public void AddFile(string filename, DateTime lastmodified, long blocksetID, long metadataID, System.Data.IDbTransaction transaction)
{
var split = SplitIntoPrefixAndName(filename);
AddFile(GetOrCreatePathPrefix(split.Key, transaction), split.Value, lastmodified, blocksetID, metadataID, transaction);
}
public void AddUnmodifiedFile(long fileid, DateTime lastmodified, System.Data.IDbTransaction transaction = null)
{
m_insertfileOperationCommand.Transaction = transaction;
m_insertfileOperationCommand.SetParameterValue(0, m_filesetId);
m_insertfileOperationCommand.SetParameterValue(1, fileid);
m_insertfileOperationCommand.SetParameterValue(2, lastmodified.ToUniversalTime().Ticks);
m_insertfileOperationCommand.ExecuteNonQuery(m_logQueries);
}
public void AddDirectoryEntry(string path, long metadataID, DateTime lastmodified, System.Data.IDbTransaction transaction = null)
{
AddFile(path, lastmodified, FOLDER_BLOCKSET_ID, metadataID, transaction);
}
public void AddSymlinkEntry(string path, long metadataID, DateTime lastmodified, System.Data.IDbTransaction transaction = null)
{
AddFile(path, lastmodified, SYMLINK_BLOCKSET_ID, metadataID, transaction);
}
public long GetFileLastModified(long prefixid, string path, long filesetid, bool includeLength, out DateTime oldModified, out long length, System.Data.IDbTransaction transaction = null)
{
if (includeLength)
{
m_selectfilelastmodifiedWithSizeCommand.Transaction = transaction;
m_selectfilelastmodifiedWithSizeCommand.SetParameterValue(0, prefixid);
m_selectfilelastmodifiedWithSizeCommand.SetParameterValue(1, path);
m_selectfilelastmodifiedWithSizeCommand.SetParameterValue(2, filesetid);
using (var rd = m_selectfilelastmodifiedWithSizeCommand.ExecuteReader(m_logQueries, null))
if (rd.Read())
{
oldModified = new DateTime(rd.ConvertValueToInt64(1), DateTimeKind.Utc);
length = rd.ConvertValueToInt64(2);
return rd.ConvertValueToInt64(0);
}
}
else
{
m_selectfilelastmodifiedCommand.Transaction = transaction;
m_selectfilelastmodifiedCommand.SetParameterValue(0, prefixid);
m_selectfilelastmodifiedCommand.SetParameterValue(1, path);
m_selectfilelastmodifiedCommand.SetParameterValue(2, filesetid);
using (var rd = m_selectfilelastmodifiedCommand.ExecuteReader(m_logQueries, null))
if (rd.Read())
{
length = -1;
oldModified = new DateTime(rd.ConvertValueToInt64(1), DateTimeKind.Utc);
return rd.ConvertValueToInt64(0);
}
}
oldModified = new DateTime(0, DateTimeKind.Utc);
length = -1;
return -1;
}
public long GetFileEntry(long prefixid, string path, long filesetid, out DateTime oldModified, out long lastFileSize, out string oldMetahash, out long oldMetasize, System.Data.IDbTransaction transaction)
{
m_findfileCommand.SetParameterValue(0, prefixid);
m_findfileCommand.SetParameterValue(1, path);
m_findfileCommand.SetParameterValue(2, filesetid);
m_findfileCommand.Transaction = transaction;
using (var rd = m_findfileCommand.ExecuteReader())
if (rd.Read())
{
oldModified = new DateTime(rd.ConvertValueToInt64(1), DateTimeKind.Utc);
lastFileSize = rd.GetInt64(2);
oldMetahash = rd.GetString(3);
oldMetasize = rd.GetInt64(4);
return rd.ConvertValueToInt64(0);
}
else
{
oldModified = new DateTime(0, DateTimeKind.Utc);
lastFileSize = -1;
oldMetahash = null;
oldMetasize = -1;
return -1;
}
}
public Tuple<long, string> GetMetadataHashAndSizeForFile(long fileid, System.Data.IDbTransaction transaction)
{
m_selectfilemetadatahashandsizeCommand.SetParameterValue(0, fileid);
m_selectfilemetadatahashandsizeCommand.Transaction = transaction;
using (var rd = m_findfileCommand.ExecuteReader())
if (rd.Read())
return new Tuple<long, string>(rd.ConvertValueToInt64(0), rd.ConvertValueToString(1));
return null;
}
public string GetFileHash(long fileid, System.Data.IDbTransaction transaction)
{
m_selectfileHashCommand.SetParameterValue(0, fileid);
m_selectfileHashCommand.Transaction = transaction;
var r = m_selectfileHashCommand.ExecuteScalar(m_logQueries, null);
if (r == null || r == DBNull.Value)
return null;
return r.ToString();
}
public override void Dispose()
{
base.Dispose();
}
private long GetPreviousFilesetID(System.Data.IDbCommand cmd)
{
return GetPreviousFilesetID(cmd, OperationTimestamp, m_filesetId);
}
private long GetPreviousFilesetID(System.Data.IDbCommand cmd, DateTime timestamp, long filesetid)
{
var lastFilesetId = cmd.ExecuteScalarInt64(@"SELECT ""ID"" FROM ""Fileset"" WHERE ""Timestamp"" < ? AND ""ID"" != ? ORDER BY ""Timestamp"" DESC ", -1, Library.Utility.Utility.NormalizeDateTimeToEpochSeconds(timestamp), filesetid);
return lastFilesetId;
}
internal Tuple<long, long> GetLastBackupFileCountAndSize()
{
using (var cmd = m_connection.CreateCommand())
{
var lastFilesetId = cmd.ExecuteScalarInt64(@"SELECT ""ID"" FROM ""Fileset"" ORDER BY ""Timestamp"" DESC LIMIT 1");
var count = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM ""FileLookup"" INNER JOIN ""FilesetEntry"" ON ""FileLookup"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ? AND ""FileLookup"".""BlocksetID"" NOT IN (?, ?)", -1, lastFilesetId, FOLDER_BLOCKSET_ID, SYMLINK_BLOCKSET_ID);
var size = cmd.ExecuteScalarInt64(@"SELECT SUM(""Blockset"".""Length"") FROM ""FileLookup"", ""FilesetEntry"", ""Blockset"" WHERE ""FileLookup"".""ID"" = ""FilesetEntry"".""FileID"" AND ""FileLookup"".""BlocksetID"" = ""Blockset"".""ID"" AND ""FilesetEntry"".""FilesetID"" = ? AND ""FileLookup"".""BlocksetID"" NOT IN (?, ?)", -1, lastFilesetId, FOLDER_BLOCKSET_ID, SYMLINK_BLOCKSET_ID);
return new Tuple<long, long>(count, size);
}
}
internal void UpdateChangeStatistics(BackupResults results, System.Data.IDbTransaction transaction)
{
using (var cmd = m_connection.CreateCommand(transaction))
{
// TODO: Optimize these queries to not use the "File" view
var lastFilesetId = GetPreviousFilesetID(cmd);
results.AddedFolders = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ? AND ""File"".""BlocksetID"" = ? AND NOT ""File"".""Path"" IN (SELECT ""Path"" FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ?)", 0, m_filesetId, FOLDER_BLOCKSET_ID, lastFilesetId);
results.AddedSymlinks = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ? AND ""File"".""BlocksetID"" = ? AND NOT ""File"".""Path"" IN (SELECT ""Path"" FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ?)", 0, m_filesetId, SYMLINK_BLOCKSET_ID, lastFilesetId);
results.DeletedFolders = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ? AND ""File"".""BlocksetID"" = ? AND NOT ""File"".""Path"" IN (SELECT ""Path"" FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ?)", 0, lastFilesetId, FOLDER_BLOCKSET_ID, m_filesetId);
results.DeletedSymlinks = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ? AND ""File"".""BlocksetID"" = ? AND NOT ""File"".""Path"" IN (SELECT ""Path"" FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ?)", 0, lastFilesetId, SYMLINK_BLOCKSET_ID, m_filesetId);
var subqueryNonFiles = @"SELECT ""File"".""Path"", ""Blockset"".""Fullhash"" FROM ""File"", ""FilesetEntry"", ""Metadataset"", ""Blockset"" WHERE ""File"".""ID"" = ""FilesetEntry"".""FileID"" AND ""Metadataset"".""ID"" = ""File"".""MetadataID"" AND ""File"".""BlocksetID"" = ? AND ""Metadataset"".""BlocksetID"" = ""Blockset"".""ID"" AND ""FilesetEntry"".""FilesetID"" = ? ";
results.ModifiedFolders = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM (" + subqueryNonFiles + @") A, (" + subqueryNonFiles + @") B WHERE ""A"".""Path"" = ""B"".""Path"" AND ""A"".""Fullhash"" != ""B"".""Fullhash"" ", 0, lastFilesetId, FOLDER_BLOCKSET_ID, m_filesetId, FOLDER_BLOCKSET_ID);
results.ModifiedSymlinks = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM (" + subqueryNonFiles + @") A, (" + subqueryNonFiles + @") B WHERE ""A"".""Path"" = ""B"".""Path"" AND ""A"".""Fullhash"" != ""B"".""Fullhash"" ", 0, lastFilesetId, SYMLINK_BLOCKSET_ID, m_filesetId, SYMLINK_BLOCKSET_ID);
var tmpName1 = "TmpFileList-" + Library.Utility.Utility.ByteArrayAsHexString(Guid.NewGuid().ToByteArray());
var tmpName2 = "TmpFileList-" + Library.Utility.Utility.ByteArrayAsHexString(Guid.NewGuid().ToByteArray());
try
{
var subqueryFiles = @"SELECT ""File"".""Path"" AS ""Path"", ""A"".""Fullhash"" AS ""Filehash"", ""B"".""Fullhash"" AS ""Metahash"" FROM ""File"", ""FilesetEntry"", ""Blockset"" A, ""Blockset"" B, ""Metadataset"" WHERE ""File"".""ID"" = ""FilesetEntry"".""FileID"" AND ""A"".""ID"" = ""File"".""BlocksetID"" AND ""FilesetEntry"".""FilesetID"" = ? AND ""File"".""MetadataID"" = ""Metadataset"".""ID"" AND ""Metadataset"".""BlocksetID"" = ""B"".""ID"" ";
cmd.ExecuteNonQuery(string.Format(@"CREATE TEMPORARY TABLE ""{0}"" AS " + subqueryFiles, tmpName1), lastFilesetId);
cmd.ExecuteNonQuery(string.Format(@"CREATE TEMPORARY TABLE ""{0}"" AS " + subqueryFiles, tmpName2), m_filesetId);
results.AddedFiles = cmd.ExecuteScalarInt64(string.Format(@"SELECT COUNT(*) FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ? AND ""File"".""BlocksetID"" != ? AND ""File"".""BlocksetID"" != ? AND NOT ""File"".""Path"" IN (SELECT ""Path"" FROM ""{0}"")", tmpName1), 0, m_filesetId, FOLDER_BLOCKSET_ID, SYMLINK_BLOCKSET_ID);
results.DeletedFiles = cmd.ExecuteScalarInt64(string.Format(@"SELECT COUNT(*) FROM ""{0}"" WHERE ""{0}"".""Path"" NOT IN (SELECT ""Path"" FROM ""File"" INNER JOIN ""FilesetEntry"" ON ""File"".""ID"" = ""FilesetEntry"".""FileID"" WHERE ""FilesetEntry"".""FilesetID"" = ?)", tmpName1), 0, m_filesetId);
results.ModifiedFiles = cmd.ExecuteScalarInt64(string.Format(@"SELECT COUNT(*) FROM ""{0}"" A, ""{1}"" B WHERE ""A"".""Path"" = ""B"".""Path"" AND (""A"".""Filehash"" != ""B"".""Filehash"" OR ""A"".""Metahash"" != ""B"".""Metahash"")", tmpName1, tmpName2), 0);
}
finally
{
try { cmd.ExecuteNonQuery(string.Format(@"DROP TABLE IF EXISTS ""{0}"";", tmpName1)); }
catch (Exception ex) { Logging.Log.WriteWarningMessage(LOGTAG, "DisposeError", ex, "Dispose temp table error"); }
try { cmd.ExecuteNonQuery(string.Format(@"DROP TABLE IF EXISTS ""{0}"";", tmpName2)); }
catch (Exception ex) { Logging.Log.WriteWarningMessage(LOGTAG, "DisposeError", ex, "Dispose temp table error"); }
}
}
}
/// <summary>
/// Populates FilesetEntry table with files from previous fileset, which aren't
/// yet part of the new fileset, and which aren't on the (optional) list of <c>deleted</c> paths.
/// </summary>
/// <param name="transaction">Transaction</param>
/// <param name="deleted">List of deleted paths, or null</param>
public void AppendFilesFromPreviousSet(System.Data.IDbTransaction transaction, IEnumerable<string> deleted = null)
{
AppendFilesFromPreviousSet(transaction, deleted, m_filesetId, -1, OperationTimestamp);
}
/// <summary>
/// Populates FilesetEntry table with files from previous fileset, which aren't
/// yet part of the new fileset, and which aren't on the (optional) list of <c>deleted</c> paths.
/// </summary>
/// <param name="transaction">Transaction</param>
/// <param name="deleted">List of deleted paths, or null</param>
/// <param name="filesetid">Current file-set ID</param>
/// <param name="prevId">Source file-set ID</param>
/// <param name="timestamp">If <c>filesetid</c> == -1, used to locate previous file-set</param>
public void AppendFilesFromPreviousSet(System.Data.IDbTransaction transaction, IEnumerable<string> deleted, long filesetid, long prevId, DateTime timestamp)
{
using (var cmd = m_connection.CreateCommand())
using (var cmdDelete = m_connection.CreateCommand())
using (var tr = new TemporaryTransactionWrapper(m_connection, transaction))
{
long lastFilesetId = prevId < 0 ? GetPreviousFilesetID(cmd, timestamp, filesetid) : prevId;
cmd.Transaction = tr.Parent;
cmd.ExecuteNonQuery(@"INSERT INTO ""FilesetEntry"" (""FilesetID"", ""FileID"", ""Lastmodified"") SELECT ? AS ""FilesetID"", ""FileID"", ""Lastmodified"" FROM (SELECT DISTINCT ""FilesetID"", ""FileID"", ""Lastmodified"" FROM ""FilesetEntry"" WHERE ""FilesetID"" = ? AND ""FileID"" NOT IN (SELECT ""FileID"" FROM ""FilesetEntry"" WHERE ""FilesetID"" = ?)) ", filesetid, lastFilesetId, filesetid);
if (deleted != null)
{
cmdDelete.Transaction = tr.Parent;
cmdDelete.CommandText = @"DELETE FROM ""FilesetEntry"" WHERE ""FilesetID"" = ? AND ""FileID"" IN (SELECT ""ID"" FROM ""File"" WHERE ""Path"" = ?) ";
cmdDelete.AddParameters(2);
cmdDelete.SetParameterValue(0, filesetid);
foreach (string s in deleted)
{
cmdDelete.SetParameterValue(1, s);
cmdDelete.ExecuteNonQuery();
}
}
tr.Commit();
}
}
/// <summary>
/// Populates FilesetEntry table with files from previous fileset, which aren't
/// yet part of the new fileset, and which aren't excluded by the (optional) exclusion
/// predicate.
/// </summary>
/// <param name="transaction">Transaction</param>
/// <param name="exclusionPredicate">Optional exclusion predicate (true = exclude file)</param>
public void AppendFilesFromPreviousSetWithPredicate(System.Data.IDbTransaction transaction, Func<string, long, bool> exclusionPredicate)
{
AppendFilesFromPreviousSetWithPredicate(transaction, exclusionPredicate, m_filesetId, -1, OperationTimestamp);
}
/// <summary>
/// Populates FilesetEntry table with files from previous fileset, which aren't
/// yet part of the new fileset, and which aren't excluded by the (optional) exclusion
/// predicate.
/// </summary>
/// <param name="transaction">Transaction</param>
/// <param name="exclusionPredicate">Optional exclusion predicate (true = exclude file)</param>
/// <param name="fileSetId">Current fileset ID</param>
/// <param name="prevFileSetId">Source fileset ID</param>
/// <param name="timestamp">If <c>prevFileSetId</c> == -1, used to locate previous fileset</param>
public void AppendFilesFromPreviousSetWithPredicate(System.Data.IDbTransaction transaction,
Func<string, long, bool> exclusionPredicate, long fileSetId, long prevFileSetId, DateTime timestamp)
{
if (exclusionPredicate == null)
{
AppendFilesFromPreviousSet(transaction, null, fileSetId, prevFileSetId, timestamp);
return;
}
using (var cmd = m_connection.CreateCommand())
using (var cmdAdd = m_connection.CreateCommand())
using (var tr = new TemporaryTransactionWrapper(m_connection, transaction))
{
var lastFilesetId =
prevFileSetId < 0 ? GetPreviousFilesetID(cmd, timestamp, fileSetId) : prevFileSetId;
// prepare command for adding new entries
cmdAdd.Transaction = tr.Parent;
cmdAdd.CommandText =
@"INSERT INTO ""FilesetEntry"" (""FilesetID"", ""FileID"", ""Lastmodified"") VALUES (?, ?, ?)";
cmdAdd.AddParameters(3);
cmdAdd.SetParameterValue(0, fileSetId);
// enumerate files from previous set
cmd.Transaction = tr.Parent;
foreach (var row in cmd.ExecuteReaderEnumerable(
@"SELECT
f.""Path"", fs.""FileID"", fs.""Lastmodified"", COALESCE(bs.""Length"", -1)
FROM ( SELECT DISTINCT ""FileID"", ""Lastmodified""
FROM ""FilesetEntry""
WHERE ""FilesetID"" = ?
AND ""FileID"" NOT IN (
SELECT ""FileID""
FROM ""FilesetEntry""
WHERE ""FilesetID"" = ?
)) AS fs
LEFT JOIN ""File"" AS f ON fs.""FileID"" = f.""ID""
LEFT JOIN ""Blockset"" AS bs ON f.""BlocksetID"" = bs.""ID"";",
lastFilesetId, fileSetId))
{
var path = row.GetString(0);
var size = row.GetInt64(3);
if (!exclusionPredicate(path, size))
{
cmdAdd.SetParameterValue(1, row.GetInt64(1));
cmdAdd.SetParameterValue(2, row.GetInt64(2));
cmdAdd.ExecuteNonQuery();
}
}
tr.Commit();
}
}
/// <summary>
/// Creates a timestamped backup operation to correctly associate the fileset with the time it was created.
/// </summary>
/// <param name="volumeid">The ID of the fileset volume to update</param>
/// <param name="timestamp">The timestamp of the operation to create</param>
/// <param name="transaction">An optional external transaction</param>
public override long CreateFileset(long volumeid, DateTime timestamp, System.Data.IDbTransaction transaction = null)
{
return m_filesetId = base.CreateFileset(volumeid, timestamp, transaction);
}
public IEnumerable<KeyValuePair<long, DateTime>> GetIncompleteFilesets(System.Data.IDbTransaction transaction)
{
using (var cmd = m_connection.CreateCommand(transaction))
{
cmd.Transaction = transaction;
using (var rd = cmd.ExecuteReader(@"SELECT DISTINCT ""Fileset"".""ID"", ""Fileset"".""Timestamp"" FROM ""Fileset"", ""RemoteVolume"" WHERE ""RemoteVolume"".""ID"" = ""Fileset"".""VolumeID"" AND ""Fileset"".""ID"" IN (SELECT ""FilesetID"" FROM ""FilesetEntry"") AND (""RemoteVolume"".""State"" = ""Uploading"" OR ""RemoteVolume"".""State"" = ""Temporary"")"))
while (rd.Read())
{
yield return new KeyValuePair<long, DateTime>(
rd.GetInt64(0),
ParseFromEpochSeconds(rd.GetInt64(1)).ToLocalTime()
);
}
}
}
public RemoteVolumeEntry GetRemoteVolumeFromFilesetID(long filesetID, IDbTransaction transaction = null)
{
using (var cmd = m_connection.CreateCommand(transaction))
using (var rd = cmd.ExecuteReader(@"SELECT ""RemoteVolume"".""ID"", ""Name"", ""Type"", ""Size"", ""Hash"", ""State"", ""DeleteGraceTime"" FROM ""RemoteVolume"", ""Fileset"" WHERE ""Fileset"".""VolumeID"" = ""RemoteVolume"".""ID"" AND ""Fileset"".""ID"" = ?", filesetID))
if (rd.Read())
return new RemoteVolumeEntry(
rd.ConvertValueToInt64(0, -1),
rd.GetValue(1).ToString(),
(rd.GetValue(4) == null || rd.GetValue(4) == DBNull.Value) ? null : rd.GetValue(4).ToString(),
rd.ConvertValueToInt64(3, -1),
(RemoteVolumeType)Enum.Parse(typeof(RemoteVolumeType), rd.GetValue(2).ToString()),
(RemoteVolumeState)Enum.Parse(typeof(RemoteVolumeState), rd.GetValue(5).ToString()),
new DateTime(rd.ConvertValueToInt64(6, 0), DateTimeKind.Utc)
);
else
return default(RemoteVolumeEntry);
}
public IEnumerable<string> GetMissingIndexFiles(System.Data.IDbTransaction transaction)
{
using (var cmd = m_connection.CreateCommand(transaction))
using (var rd = cmd.ExecuteReader(@"SELECT ""Name"" FROM ""RemoteVolume"" WHERE ""Type"" = ? AND NOT ""ID"" IN (SELECT ""BlockVolumeID"" FROM ""IndexBlockLink"") AND ""State"" IN (?,?)", RemoteVolumeType.Blocks.ToString(), RemoteVolumeState.Uploaded.ToString(), RemoteVolumeState.Verified.ToString()))
while (rd.Read())
yield return rd.GetValue(0).ToString();
}
public void LinkFilesetToVolume(long filesetid, long volumeid, System.Data.IDbTransaction transaction)
{
using (var cmd = m_connection.CreateCommand())
{
cmd.Transaction = transaction;
var c = cmd.ExecuteNonQuery(@"UPDATE ""Fileset"" SET ""VolumeID"" = ? WHERE ""ID"" = ?", volumeid, filesetid);
if (c != 1)
throw new Exception(string.Format("Failed to link filesetid {0} to volumeid {1}", filesetid, volumeid));
}
}
public void MoveBlockToVolume(string blockkey, long size, long sourcevolumeid, long targetvolumeid, System.Data.IDbTransaction transaction)
{
using (var cmd = m_connection.CreateCommand())
{
cmd.Transaction = transaction;
var c = cmd.ExecuteNonQuery(@"UPDATE ""Block"" SET ""VolumeID"" = ? WHERE ""Hash"" = ? AND ""Size"" = ? AND ""VolumeID"" = ? ", targetvolumeid, blockkey, size, sourcevolumeid);
if (c != 1)
throw new Exception(string.Format("Failed to move block {0}:{1} from volume {2}, count: {3}", blockkey, size, sourcevolumeid, c));
}
}
public void SafeDeleteRemoteVolume(string name, System.Data.IDbTransaction transaction)
{
var volumeid = GetRemoteVolumeID(name, transaction);
using (var cmd = m_connection.CreateCommand(transaction))
{
var c = cmd.ExecuteScalarInt64(@"SELECT COUNT(*) FROM ""Block"" WHERE ""VolumeID"" = ? ", -1, volumeid);
if (c != 0)
throw new Exception(string.Format("Failed to safe-delete volume {0}, blocks: {1}", name, c));
RemoveRemoteVolume(name, transaction);
}
}
public string[] GetBlocklistHashes(string name, System.Data.IDbTransaction transaction)
{
var volumeid = GetRemoteVolumeID(name, transaction);
using (var cmd = m_connection.CreateCommand(transaction))
{
// Grab the strings and return as array to avoid concurrent access to the IEnumerable
return cmd.ExecuteReaderEnumerable(
@"SELECT DISTINCT ""Block"".""Hash"" FROM ""Block"" WHERE ""Block"".""VolumeID"" = ? AND ""Block"".""Hash"" IN (SELECT ""Hash"" FROM ""BlocklistHash"")", volumeid)
.Select(x => x.ConvertValueToString(0))
.ToArray();
}
}
public string GetFirstPath()
{
using (var cmd = m_connection.CreateCommand())
{
cmd.CommandText = @"SELECT ""Path"" FROM ""File"" ORDER BY LENGTH(""Path"") DESC LIMIT 1";
var v0 = cmd.ExecuteScalar();
if (v0 == null || v0 == DBNull.Value)
return null;
return v0.ToString();
}
}
/// <summary>
/// Retrieves change journal data for file set
/// </summary>
/// <param name="fileSetId">Fileset-ID</param>
public IEnumerable<Interface.USNJournalDataEntry> GetChangeJournalData(long fileSetId)
{
var data = new List<Interface.USNJournalDataEntry>();
using (var cmd = m_connection.CreateCommand())
using (var rd =
cmd.ExecuteReader(
@"SELECT ""VolumeName"", ""JournalID"", ""NextUSN"", ""ConfigHash"" FROM ""ChangeJournalData"" WHERE ""FilesetID"" = ?",
fileSetId))
{
while (rd.Read())
{
data.Add(new Interface.USNJournalDataEntry
{
Volume = rd.ConvertValueToString(0),
JournalId = rd.ConvertValueToInt64(1),
NextUsn = rd.ConvertValueToInt64(2),
ConfigHash = rd.ConvertValueToString(3)
});
}
}
return data;
}
/// <summary>
/// Adds NTFS change journal data for file set and volume
/// </summary>
/// <param name="data">Data to add</param>
/// <param name="transaction">An optional external transaction</param>
public void CreateChangeJournalData(IEnumerable<Interface.USNJournalDataEntry> data, System.Data.IDbTransaction transaction = null)
{
using (var tr = new TemporaryTransactionWrapper(m_connection, transaction))
{
foreach (var entry in data)
{
using (var cmd = m_connection.CreateCommand())
{
cmd.Transaction = tr.Parent;
var c = cmd.ExecuteNonQuery(
@"INSERT INTO ""ChangeJournalData"" (""FilesetID"", ""VolumeName"", ""JournalID"", ""NextUSN"", ""ConfigHash"") VALUES (?, ?, ?, ?, ?);",
m_filesetId, entry.Volume, entry.JournalId, entry.NextUsn, entry.ConfigHash);
if (c != 1)
throw new Exception("Unable to add change journal entry");
}
}
tr.Commit();
}
}
/// <summary>
/// Adds NTFS change journal data for file set and volume
/// </summary>
/// <param name="data">Data to add</param>
/// <param name="fileSetId">Existing file set to update</param>
/// <param name="transaction">An optional external transaction</param>
public void UpdateChangeJournalData(IEnumerable<Interface.USNJournalDataEntry> data, long fileSetId, System.Data.IDbTransaction transaction = null)
{
using (var tr = new TemporaryTransactionWrapper(m_connection, transaction))
{
foreach (var entry in data)
{
using (var cmd = m_connection.CreateCommand())
{
cmd.Transaction = tr.Parent;
cmd.ExecuteNonQuery(
@"UPDATE ""ChangeJournalData"" SET ""NextUSN"" = ? WHERE ""FilesetID"" = ? AND ""VolumeName"" = ? AND ""JournalID"" = ?;",
entry.NextUsn, fileSetId, entry.Volume, entry.JournalId);
}
}
tr.Commit();
}
}
}
}
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