705 lines
23 KiB
C#
705 lines
23 KiB
C#
using LightlessSync.LightlessConfiguration;
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using LightlessSync.Services;
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using LightlessSync.Utils;
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using Microsoft.Extensions.Logging;
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using System.Collections.Concurrent;
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using System.Diagnostics;
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using System.IO;
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using System.Runtime.InteropServices;
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using System.Threading.Channels;
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using static LightlessSync.Utils.FileSystemHelper;
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namespace LightlessSync.FileCache;
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public sealed class FileCompactor : IDisposable
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{
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public const uint FSCTL_DELETE_EXTERNAL_BACKING = 0x90314U;
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public const ulong WOF_PROVIDER_FILE = 2UL;
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private readonly Dictionary<string, int> _clusterSizes;
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private readonly ConcurrentDictionary<string, byte> _pendingCompactions;
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private readonly WOF_FILE_COMPRESSION_INFO_V1 _efInfo;
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private readonly ILogger<FileCompactor> _logger;
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private readonly LightlessConfigService _lightlessConfigService;
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private readonly DalamudUtilService _dalamudUtilService;
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private readonly Channel<string> _compactionQueue;
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private readonly CancellationTokenSource _compactionCts = new();
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private readonly Task _compactionWorker;
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public FileCompactor(ILogger<FileCompactor> logger, LightlessConfigService lightlessConfigService, DalamudUtilService dalamudUtilService)
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{
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_clusterSizes = new(StringComparer.Ordinal);
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_pendingCompactions = new(StringComparer.OrdinalIgnoreCase);
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_logger = logger;
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_lightlessConfigService = lightlessConfigService;
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_dalamudUtilService = dalamudUtilService;
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_efInfo = new WOF_FILE_COMPRESSION_INFO_V1
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{
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Algorithm = CompressionAlgorithm.XPRESS8K,
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Flags = 0
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};
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_compactionQueue = Channel.CreateUnbounded<string>(new UnboundedChannelOptions
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{
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SingleReader = true,
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SingleWriter = false
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});
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_compactionWorker = Task.Factory.StartNew(
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() => ProcessQueueAsync(_compactionCts.Token),
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_compactionCts.Token,
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TaskCreationOptions.LongRunning,
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TaskScheduler.Default)
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.Unwrap();
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}
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private enum CompressionAlgorithm
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{
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NO_COMPRESSION = -2,
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LZNT1 = -1,
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XPRESS4K = 0,
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LZX = 1,
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XPRESS8K = 2,
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XPRESS16K = 3
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}
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public bool MassCompactRunning { get; private set; } = false;
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public string Progress { get; private set; } = string.Empty;
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public void CompactStorage(bool compress)
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{
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MassCompactRunning = true;
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int currentFile = 1;
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var allFiles = Directory.EnumerateFiles(_lightlessConfigService.Current.CacheFolder).ToList();
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int allFilesCount = allFiles.Count;
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foreach (var file in allFiles)
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{
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Progress = $"{currentFile}/{allFilesCount}";
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if (compress)
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CompactFile(file);
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else
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DecompressFile(file);
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currentFile++;
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}
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MassCompactRunning = false;
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}
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public long GetFileSizeOnDisk(FileInfo fileInfo)
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{
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var fsType = GetFilesystemType(fileInfo.FullName, _dalamudUtilService.IsWine);
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if (fsType != FilesystemType.Btrfs && fsType != FilesystemType.NTFS)
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{
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return fileInfo.Length;
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}
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if (fsType == FilesystemType.NTFS && !_dalamudUtilService.IsWine)
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{
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return GetFileSizeOnDisk(fileInfo, GetClusterSize);
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}
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if (fsType == FilesystemType.Btrfs)
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{
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try
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{
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long blocks = RunStatGetBlocks(fileInfo.FullName);
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return blocks * 512L;
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}
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catch (Exception ex)
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{
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_logger.LogDebug(ex, "Failed to get on-disk size via stat for {file}, falling back to Length", fileInfo.FullName);
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return fileInfo.Length;
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}
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}
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return fileInfo.Length;
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}
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public async Task WriteAllBytesAsync(string filePath, byte[] decompressedFile, CancellationToken token)
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{
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var dir = Path.GetDirectoryName(filePath);
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if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
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Directory.CreateDirectory(dir);
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await File.WriteAllBytesAsync(filePath, decompressedFile, token).ConfigureAwait(false);
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if (!_lightlessConfigService.Current.UseCompactor)
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return;
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EnqueueCompaction(filePath);
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}
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public void Dispose()
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{
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_compactionQueue.Writer.TryComplete();
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_compactionCts.Cancel();
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try
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{
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if (!_compactionWorker.Wait(TimeSpan.FromSeconds(5)))
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{
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_logger.LogDebug("Compaction worker did not shut down within timeout");
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}
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}
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catch (Exception ex) when (ex is not OperationCanceledException)
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{
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_logger.LogDebug(ex, "Error shutting down compaction worker");
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}
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finally
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{
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_compactionCts.Dispose();
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}
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GC.SuppressFinalize(this);
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}
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[DllImport("libc", SetLastError = true)]
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private static extern int statvfs(string path, out Statvfs buf);
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[StructLayout(LayoutKind.Sequential)]
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private struct Statvfs
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{
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public ulong f_bsize;
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public ulong f_frsize;
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public ulong f_blocks;
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public ulong f_bfree;
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public ulong f_bavail;
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public ulong f_files;
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public ulong f_ffree;
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public ulong f_favail;
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public ulong f_fsid;
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public ulong f_flag;
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public ulong f_namemax;
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}
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private static int GetLinuxBlockSize(string path)
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{
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try
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{
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int result = statvfs(path, out var buf);
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if (result != 0)
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return -1;
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return (int)buf.f_frsize;
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}
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catch
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{
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return -1;
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}
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}
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[DllImport("kernel32.dll")]
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private static extern int DeviceIoControl(IntPtr hDevice, uint dwIoControlCode, IntPtr lpInBuffer, uint nInBufferSize, IntPtr lpOutBuffer, uint nOutBufferSize, out IntPtr lpBytesReturned, out IntPtr lpOverlapped);
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[DllImport("kernel32.dll")]
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private static extern uint GetCompressedFileSizeW([In, MarshalAs(UnmanagedType.LPWStr)] string lpFileName,
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[Out, MarshalAs(UnmanagedType.U4)] out uint lpFileSizeHigh);
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[DllImport("kernel32.dll", SetLastError = true, PreserveSig = true)]
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private static extern int GetDiskFreeSpaceW([In, MarshalAs(UnmanagedType.LPWStr)] string lpRootPathName,
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out uint lpSectorsPerCluster, out uint lpBytesPerSector, out uint lpNumberOfFreeClusters,
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out uint lpTotalNumberOfClusters);
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[DllImport("WoFUtil.dll")]
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private static extern int WofIsExternalFile([MarshalAs(UnmanagedType.LPWStr)] string Filepath, out int IsExternalFile, out uint Provider, out WOF_FILE_COMPRESSION_INFO_V1 Info, ref uint BufferLength);
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[DllImport("WofUtil.dll")]
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private static extern int WofSetFileDataLocation(IntPtr FileHandle, ulong Provider, IntPtr ExternalFileInfo, ulong Length);
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private void CompactFile(string filePath)
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{
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var fi = new FileInfo(filePath);
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if (!fi.Exists)
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{
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_logger.LogDebug("Skipping compaction for missing file {file}", filePath);
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return;
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}
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var fsType = GetFilesystemType(filePath, _dalamudUtilService.IsWine);
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var oldSize = fi.Length;
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int clusterSize = GetClusterSize(fi);
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if (oldSize < Math.Max(clusterSize, 8 * 1024))
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{
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_logger.LogDebug("File {file} is smaller than cluster size ({size}), ignoring", filePath, clusterSize);
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return;
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}
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// NTFS Compression.
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if (fsType == FilesystemType.NTFS && !_dalamudUtilService.IsWine)
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{
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if (!IsWOFCompactedFile(filePath))
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{
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_logger.LogDebug("Compacting file to XPRESS8K: {file}", filePath);
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var success = WOFCompressFile(filePath);
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if (success)
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{
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var newSize = GetFileSizeOnDisk(fi);
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_logger.LogDebug("Compressed {file} from {orig}b to {comp}b", filePath, oldSize, newSize);
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}
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else
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{
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_logger.LogWarning("NTFS compression failed or not available for {file}", filePath);
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}
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}
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else
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{
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_logger.LogDebug("File {file} already compressed (NTFS)", filePath);
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}
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}
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// BTRFS Compression
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if (fsType == FilesystemType.Btrfs)
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{
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if (!IsBtrfsCompressedFile(filePath))
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{
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_logger.LogDebug("Attempting btrfs compression for {file}", filePath);
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var success = BtrfsCompressFile(filePath);
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if (success)
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{
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var newSize = GetFileSizeOnDisk(fi);
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_logger.LogDebug("Btrfs-compressed {file} from {orig}b to {comp}b", filePath, oldSize, newSize);
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}
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else
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{
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_logger.LogWarning("Btrfs compression failed or not available for {file}", filePath);
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}
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}
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else
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{
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_logger.LogDebug("File {file} already compressed (Btrfs)", filePath);
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}
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}
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}
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private static long GetFileSizeOnDisk(FileInfo fileInfo, Func<FileInfo, int> getClusterSize)
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{
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int clusterSize = getClusterSize(fileInfo);
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if (clusterSize <= 0)
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return fileInfo.Length;
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uint low = GetCompressedFileSizeW(fileInfo.FullName, out uint high);
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long compressed = ((long)high << 32) | low;
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return ((compressed + clusterSize - 1) / clusterSize) * clusterSize;
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}
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private static long RunStatGetBlocks(string path)
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{
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var psi = new ProcessStartInfo("stat", $"-c %b \"{path}\"")
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{
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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UseShellExecute = false,
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CreateNoWindow = true
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};
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using var proc = Process.Start(psi) ?? throw new InvalidOperationException("Could not start stat process");
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var outp = proc.StandardOutput.ReadToEnd();
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var err = proc.StandardError.ReadToEnd();
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proc.WaitForExit();
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if (proc.ExitCode != 0)
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{
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throw new InvalidOperationException($"stat failed: {err}");
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}
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if (!long.TryParse(outp.Trim(), out var blocks))
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{
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throw new InvalidOperationException($"invalid stat output: {outp}");
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}
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return blocks;
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}
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private void DecompressFile(string path)
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{
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_logger.LogDebug("Removing compression from {file}", path);
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var fsType = GetFilesystemType(path, _dalamudUtilService.IsWine);
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//NTFS Decompression
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if (fsType == FilesystemType.NTFS && !_dalamudUtilService.IsWine)
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{
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try
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{
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using var fs = new FileStream(path, FileMode.Open);
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#pragma warning disable S3869 // "SafeHandle.DangerousGetHandle" should not be called
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var hDevice = fs.SafeFileHandle.DangerousGetHandle();
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#pragma warning restore S3869 // "SafeHandle.DangerousGetHandle" should not be called
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_ = DeviceIoControl(hDevice, FSCTL_DELETE_EXTERNAL_BACKING, nint.Zero, 0, nint.Zero, 0, out _, out _);
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}
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catch (Exception ex)
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{
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_logger.LogWarning(ex, "Error decompressing file {path}", path);
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}
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return;
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}
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//BTRFS Decompression
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if (fsType == FilesystemType.Btrfs)
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{
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try
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{
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var mountOptions = GetMountOptionsForPath(path);
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if (mountOptions.Contains("compress", StringComparison.OrdinalIgnoreCase))
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{
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_logger.LogWarning(
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"Cannot safely decompress {file}: filesystem mounted with compression ({opts}). " +
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"Remount with 'compress=no' before running decompression.", path, mountOptions);
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return;
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}
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_logger.LogDebug("Rewriting {file} to remove btrfs compression...", path);
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var psi = new ProcessStartInfo("btrfs", $"filesystem defragment -- \"{path}\"")
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{
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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UseShellExecute = false,
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CreateNoWindow = true
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};
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using var proc = Process.Start(psi);
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if (proc == null)
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{
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_logger.LogWarning("Failed to start btrfs defragment for decompression of {file}", path);
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return;
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}
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var stdout = proc.StandardOutput.ReadToEnd();
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var stderr = proc.StandardError.ReadToEnd();
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proc.WaitForExit();
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if (proc.ExitCode != 0)
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{
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_logger.LogWarning("btrfs defragment failed for {file}: {err}", path, stderr);
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}
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else
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{
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if (!string.IsNullOrWhiteSpace(stdout))
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_logger.LogDebug("btrfs defragment output for {file}: {out}", path, stdout.Trim());
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_logger.LogInformation("Decompressed (rewritten uncompressed) btrfs file: {file}", path);
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}
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}
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catch (Exception ex)
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{
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_logger.LogWarning(ex, "Error rewriting {file} for decompression", path);
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}
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}
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}
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private int GetClusterSize(FileInfo fi)
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{
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try
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{
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if (!fi.Exists)
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return -1;
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var root = fi.Directory?.Root.FullName;
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if (string.IsNullOrEmpty(root))
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return -1;
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root = root.ToLowerInvariant();
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if (_clusterSizes.TryGetValue(root, out int cached))
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return cached;
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_logger.LogDebug("Determining cluster/block size for {path} (root: {root})", fi.FullName, root);
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int clusterSize;
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if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) && !_dalamudUtilService.IsWine)
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{
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int result = GetDiskFreeSpaceW(
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root,
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out uint sectorsPerCluster,
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out uint bytesPerSector,
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out _,
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out _);
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if (result == 0)
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{
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_logger.LogWarning("GetDiskFreeSpaceW failed for {root}", root);
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return -1;
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}
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clusterSize = (int)(sectorsPerCluster * bytesPerSector);
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}
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else
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{
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clusterSize = GetLinuxBlockSize(root);
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if (clusterSize <= 0)
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{
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_logger.LogWarning("Failed to determine block size for {root}", root);
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return -1;
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}
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}
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_clusterSizes[root] = clusterSize;
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_logger.LogDebug("Determined cluster/block size for {root}: {cluster} bytes", root, clusterSize);
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return clusterSize;
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}
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catch (Exception ex)
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{
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_logger.LogWarning(ex, "Error determining cluster size for {file}", fi.FullName);
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return -1;
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}
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}
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public static bool UseSafeHandle(SafeHandle handle, Func<IntPtr, bool> action)
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{
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bool addedRef = false;
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try
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{
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handle.DangerousAddRef(ref addedRef);
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IntPtr ptr = handle.DangerousGetHandle();
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return action(ptr);
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}
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finally
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{
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if (addedRef)
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handle.DangerousRelease();
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}
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}
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private static bool IsWOFCompactedFile(string filePath)
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{
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uint buf = 8;
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_ = WofIsExternalFile(filePath, out int isExtFile, out uint _, out var info, ref buf);
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if (isExtFile == 0) return false;
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return info.Algorithm == CompressionAlgorithm.XPRESS8K;
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}
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private bool IsBtrfsCompressedFile(string path)
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{
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try
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{
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var psi = new ProcessStartInfo("filefrag", $"-v \"{path}\"")
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{
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RedirectStandardOutput = true,
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RedirectStandardError = true,
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UseShellExecute = false,
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CreateNoWindow = true
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};
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using var proc = Process.Start(psi);
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if (proc == null)
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{
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_logger.LogWarning("Failed to start filefrag for {file}", path);
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return false;
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}
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string output = proc.StandardOutput.ReadToEnd();
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proc.WaitForExit();
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if (output.Contains("flags: compressed", StringComparison.OrdinalIgnoreCase))
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{
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return true;
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}
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return false;
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}
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catch (Exception ex)
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{
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_logger.LogDebug(ex, "Failed to detect btrfs compression for {file}", path);
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return false;
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}
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}
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private bool WOFCompressFile(string path)
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{
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var efInfoPtr = Marshal.AllocHGlobal(Marshal.SizeOf(_efInfo));
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Marshal.StructureToPtr(_efInfo, efInfoPtr, fDeleteOld: true);
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ulong length = (ulong)Marshal.SizeOf(_efInfo);
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try
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{
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using var fs = new FileStream(path, FileMode.Open, FileAccess.ReadWrite, FileShare.None);
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var handle = fs.SafeFileHandle;
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if (handle.IsInvalid)
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{
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_logger.LogWarning("Invalid file handle to {file}", path);
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return false;
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}
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return UseSafeHandle(handle, hFile =>
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{
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int ret = WofSetFileDataLocation(hFile, WOF_PROVIDER_FILE, efInfoPtr, length);
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if (ret != 0 && ret != unchecked((int)0x80070158))
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{
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_logger.LogWarning("Failed to compact {file}: {ret}", path, ret.ToString("X"));
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return false;
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}
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return true;
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});
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}
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catch (Exception ex)
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{
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_logger.LogWarning(ex, "Error compacting file {path}", path);
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return false;
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}
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finally
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{
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Marshal.FreeHGlobal(efInfoPtr);
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}
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}
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private bool BtrfsCompressFile(string path)
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|
{
|
|
try
|
|
{
|
|
var psi = new ProcessStartInfo("btrfs", $"filesystem defragment -czstd -- \"{path}\"")
|
|
{
|
|
RedirectStandardOutput = true,
|
|
RedirectStandardError = true,
|
|
UseShellExecute = false,
|
|
CreateNoWindow = true
|
|
};
|
|
|
|
using var proc = Process.Start(psi);
|
|
if (proc == null)
|
|
{
|
|
_logger.LogWarning("Failed to start btrfs process for {file}", path);
|
|
return false;
|
|
}
|
|
|
|
var stdout = proc.StandardOutput.ReadToEnd();
|
|
var stderr = proc.StandardError.ReadToEnd();
|
|
proc.WaitForExit();
|
|
|
|
if (proc.ExitCode != 0)
|
|
{
|
|
_logger.LogWarning("btrfs defrag returned {code} for {file}: {err}", proc.ExitCode, path, stderr);
|
|
return false;
|
|
}
|
|
|
|
_logger.LogDebug("btrfs output: {out}", stdout);
|
|
return true;
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogWarning(ex, "Error running btrfs defragment for {file}", path);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
private string GetMountOptionsForPath(string path)
|
|
{
|
|
try
|
|
{
|
|
var fullPath = Path.GetFullPath(path);
|
|
var mounts = File.ReadAllLines("/proc/mounts");
|
|
string bestMount = string.Empty;
|
|
string mountOptions = string.Empty;
|
|
|
|
foreach (var line in mounts)
|
|
{
|
|
var parts = line.Split(' ');
|
|
if (parts.Length < 4) continue;
|
|
var mountPoint = parts[1].Replace("\\040", " ", StringComparison.Ordinal);
|
|
string normalized;
|
|
try { normalized = Path.GetFullPath(mountPoint); }
|
|
catch { normalized = mountPoint; }
|
|
|
|
if (fullPath.StartsWith(normalized, StringComparison.Ordinal) &&
|
|
normalized.Length > bestMount.Length)
|
|
{
|
|
bestMount = normalized;
|
|
mountOptions = parts[3];
|
|
}
|
|
}
|
|
|
|
return mountOptions;
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogDebug(ex, "Failed to get mount options for {path}", path);
|
|
return string.Empty;
|
|
}
|
|
}
|
|
|
|
private struct WOF_FILE_COMPRESSION_INFO_V1
|
|
{
|
|
public CompressionAlgorithm Algorithm;
|
|
public ulong Flags;
|
|
}
|
|
|
|
private void EnqueueCompaction(string filePath)
|
|
{
|
|
if (!_pendingCompactions.TryAdd(filePath, 0))
|
|
return;
|
|
|
|
var fsType = GetFilesystemType(filePath, _dalamudUtilService.IsWine);
|
|
|
|
if (fsType != FilesystemType.NTFS && fsType != FilesystemType.Btrfs)
|
|
{
|
|
_logger.LogTrace("Skipping compaction enqueue for unsupported filesystem {fs} ({file})", fsType, filePath);
|
|
_pendingCompactions.TryRemove(filePath, out _);
|
|
return;
|
|
}
|
|
|
|
if (!_compactionQueue.Writer.TryWrite(filePath))
|
|
{
|
|
_pendingCompactions.TryRemove(filePath, out _);
|
|
_logger.LogDebug("Failed to enqueue compaction job for {file}", filePath);
|
|
}
|
|
else
|
|
{
|
|
_logger.LogTrace("Queued compaction job for {file} (fs={fs})", filePath, fsType);
|
|
}
|
|
}
|
|
|
|
private async Task ProcessQueueAsync(CancellationToken token)
|
|
{
|
|
try
|
|
{
|
|
while (await _compactionQueue.Reader.WaitToReadAsync(token).ConfigureAwait(false))
|
|
{
|
|
while (_compactionQueue.Reader.TryRead(out var filePath))
|
|
{
|
|
try
|
|
{
|
|
if (token.IsCancellationRequested)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (!_lightlessConfigService.Current.UseCompactor)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
if (!File.Exists(filePath))
|
|
{
|
|
_logger.LogTrace("Skipping compaction for missing file {file}", filePath);
|
|
continue;
|
|
}
|
|
|
|
CompactFile(filePath);
|
|
}
|
|
catch (OperationCanceledException)
|
|
{
|
|
return;
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
_logger.LogWarning(ex, "Error compacting file {file}", filePath);
|
|
}
|
|
finally
|
|
{
|
|
_pendingCompactions.TryRemove(filePath, out _);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
catch (OperationCanceledException)
|
|
{
|
|
_logger.LogDebug("Queue has been cancelled by token");
|
|
}
|
|
}
|
|
}
|