187 lines
10 KiB
C#
187 lines
10 KiB
C#
// Copyright (C) 2011, Kenneth Skovhede
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// http://www.hexad.dk, opensource@hexad.dk
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using Duplicati.Library.Main.Database;
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using System.Linq;
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using System.Collections.Generic;
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namespace Duplicati.Library.Main.Operation
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{
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internal class TestHandler
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{
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private readonly Options m_options;
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private string m_backendurl;
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private TestResults m_results;
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public TestHandler(string backendurl, Options options, TestResults results)
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{
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m_options = options;
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m_backendurl = backendurl;
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m_results = results;
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}
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public void Run(long samples)
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{
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if (!System.IO.File.Exists(m_options.Dbpath))
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throw new Exception(string.Format("Database file does not exist: {0}", m_options.Dbpath));
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using(var db = new LocalTestDatabase(m_options.Dbpath))
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using(var backend = new BackendManager(m_backendurl, m_options, m_results.BackendWriter, db))
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{
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db.SetResult(m_results);
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Utility.VerifyParameters(db, m_options);
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if (!m_options.NoBackendverification)
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FilelistProcessor.VerifyRemoteList(backend, m_options, db, m_results.BackendWriter);
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DoRun(samples, db, backend);
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}
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}
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public void DoRun(long samples, LocalTestDatabase db, BackendManager backend)
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{
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var blockhasher = System.Security.Cryptography.HashAlgorithm.Create(m_options.BlockHashAlgorithm);
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if (blockhasher == null)
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throw new Exception(string.Format(Strings.Foresthash.InvalidHashAlgorithm, m_options.BlockHashAlgorithm));
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if (!blockhasher.CanReuseTransform)
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throw new Exception(string.Format(Strings.Foresthash.InvalidCryptoSystem, m_options.BlockHashAlgorithm));
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var hashsize = blockhasher.HashSize / 8;
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var files = db.SelectTestTargets(samples, m_options).ToList();
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if (m_options.FullRemoteVerification)
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{
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foreach(var vol in new AsyncDownloader(files, backend))
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{
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var parsedInfo = Volumes.VolumeBase.ParseFilename(vol.Name);
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try
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{
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using(var tf = vol.TempFile)
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{
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if (parsedInfo.FileType == RemoteVolumeType.Files)
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{
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//Compare with db and see if all files are accounted for
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// with correct file hashes and blocklist hashes
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using(var fl = db.CreateFilelist(vol.Name))
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{
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using(var rd = new Volumes.FilesetVolumeReader(parsedInfo.CompressionModule, tf, m_options))
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foreach(var f in rd.Files)
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fl.Add(f.Path, f.Size, f.Hash, f.Metasize, f.Metahash, f.BlocklistHashes, f.Type, f.Time);
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m_results.AddResult(vol.Name, fl.Compare().ToList());
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}
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}
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else if (parsedInfo.FileType == RemoteVolumeType.Index)
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{
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var blocklinks = new List<Tuple<string, string, long>>();
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IEnumerable<KeyValuePair<Duplicati.Library.Interface.TestEntryStatus, string>> combined = new KeyValuePair<Duplicati.Library.Interface.TestEntryStatus, string>[0];
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//Compare with db and see that all hashes and volumes are listed
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using(var rd = new Volumes.IndexVolumeReader(parsedInfo.CompressionModule, tf, m_options, hashsize))
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foreach(var v in rd.Volumes)
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{
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blocklinks.Add(new Tuple<string, string, long>(v.Filename, v.Hash, v.Length));
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using(var bl = db.CreateBlocklist(v.Filename))
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{
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foreach(var h in v.Blocks)
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bl.AddBlock(h.Key, h.Value);
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combined = combined.Union(bl.Compare().ToArray());
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}
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}
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using(var il = db.CreateIndexlist(vol.Name))
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{
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foreach(var t in blocklinks)
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il.AddBlockLink(t.Item1, t.Item2, t.Item3);
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combined = combined.Union(il.Compare()).ToList();
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}
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m_results.AddResult(vol.Name, combined.ToList());
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}
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else if (parsedInfo.FileType == RemoteVolumeType.Blocks)
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{
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using(var bl = db.CreateBlocklist(vol.Name))
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using(var rd = new Volumes.BlockVolumeReader(parsedInfo.CompressionModule, tf, m_options))
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{
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//Verify that all blocks are in the file
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foreach(var b in rd.Blocks)
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bl.AddBlock(b.Key, b.Value);
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//Select 20% random blocks and verify their hashes match the filename and size
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var hashsamples = new List<KeyValuePair<string, long>>(rd.Blocks);
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var sampleCount = Math.Min(Math.Max(0, (int)(hashsamples.Count * 0.2)), hashsamples.Count - 1);
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var rnd = new Random();
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while (hashsamples.Count > sampleCount)
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hashsamples.RemoveAt(rnd.Next(hashsamples.Count));
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var blockbuffer = new byte[m_options.Blocksize];
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var changes = new List<KeyValuePair<Library.Interface.TestEntryStatus, string>>();
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foreach(var s in hashsamples)
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{
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var size = rd.ReadBlock(s.Key, blockbuffer);
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if (size != s.Value)
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changes.Add(new KeyValuePair<Library.Interface.TestEntryStatus, string>(Library.Interface.TestEntryStatus.Modified, s.Key));
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else
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{
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var hash = Convert.ToBase64String(blockhasher.ComputeHash(blockbuffer, 0, size));
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if (hash != s.Key)
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changes.Add(new KeyValuePair<Library.Interface.TestEntryStatus, string>(Library.Interface.TestEntryStatus.Modified, s.Key));
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}
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}
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m_results.AddResult(vol.Name, changes.Union(bl.Compare().ToList()));
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}
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}
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}
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db.UpdateVerificationCount(vol.Name);
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}
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catch (Exception ex)
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{
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m_results.AddResult(vol.Name, new KeyValuePair<Duplicati.Library.Interface.TestEntryStatus, string>[] { new KeyValuePair<Duplicati.Library.Interface.TestEntryStatus, string>(Duplicati.Library.Interface.TestEntryStatus.Error, ex.Message) });
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m_results.AddError(string.Format("Failed to process file {0}", vol.Name), ex);
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}
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}
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}
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else
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{
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foreach(var f in files)
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{
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try
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{
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backend.GetForTesting(f.Name, f.Size, f.Hash);
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db.UpdateVerificationCount(f.Name);
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}
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catch (Exception ex)
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{
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m_results.AddResult(f.Name, new KeyValuePair<Duplicati.Library.Interface.TestEntryStatus, string>[] { new KeyValuePair<Duplicati.Library.Interface.TestEntryStatus, string>(Duplicati.Library.Interface.TestEntryStatus.Error, ex.Message) });
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m_results.AddError(string.Format("Failed to process file {0}", f.Name), ex);
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}
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}
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}
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}
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}
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}
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