LightlessSync/FileCache/CacheMonitor.cs

@@ -115,6 +115,8 @@ public sealed class CacheMonitor : DisposableMediatorSubscriberBase
 
     public bool StorageisNTFS { get; private set; } = false;
 
+    public bool StorageIsBtrfs { get ; private set; } = false;
+
     public void StartLightlessWatcher(string? lightlessPath)
     {
         LightlessWatcher?.Dispose();
@@ -124,10 +126,19 @@ public sealed class CacheMonitor : DisposableMediatorSubscriberBase
             Logger.LogWarning("Lightless file path is not set, cannot start the FSW for Lightless.");
             return;
         }
+        var fsType = FileSystemHelper.GetFilesystemType(_configService.Current.CacheFolder, _dalamudUtil.IsWine);
 
-        DriveInfo di = new(new DirectoryInfo(_configService.Current.CacheFolder).Root.FullName);
-        StorageisNTFS = string.Equals("NTFS", di.DriveFormat, StringComparison.OrdinalIgnoreCase);
-        Logger.LogInformation("Lightless Storage is on NTFS drive: {isNtfs}", StorageisNTFS);
+        if (fsType == FileSystemHelper.FilesystemType.NTFS)
+        {
+            StorageisNTFS = true;
+            Logger.LogInformation("Lightless Storage is on NTFS drive: {isNtfs}", StorageisNTFS);
+        }
+
+        if (fsType == FileSystemHelper.FilesystemType.Btrfs)
+        {
+            StorageIsBtrfs = true;
+            Logger.LogInformation("Lightless Storage is on BTRFS drive: {isBtrfs}", StorageIsBtrfs);
+        }
 
         Logger.LogDebug("Initializing Lightless FSW on {path}", lightlessPath);
         LightlessWatcher = new()
@@ -392,51 +403,94 @@ public sealed class CacheMonitor : DisposableMediatorSubscriberBase
 
     public void RecalculateFileCacheSize(CancellationToken token)
     {
-        if (string.IsNullOrEmpty(_configService.Current.CacheFolder) || !Directory.Exists(_configService.Current.CacheFolder))
+        if (string.IsNullOrEmpty(_configService.Current.CacheFolder) ||
+            !Directory.Exists(_configService.Current.CacheFolder))
         {
             FileCacheSize = 0;
             return;
         }
 
         FileCacheSize = -1;
-        DriveInfo di = new(new DirectoryInfo(_configService.Current.CacheFolder).Root.FullName);
+        bool isWine = _dalamudUtil?.IsWine ?? false;
+
         try
         {
-            FileCacheDriveFree = di.AvailableFreeSpace;
+            var drive = DriveInfo.GetDrives()
+                .FirstOrDefault(d => _configService.Current.CacheFolder
+                    .StartsWith(d.Name, StringComparison.OrdinalIgnoreCase));
+
+            if (drive != null)
+                FileCacheDriveFree = drive.AvailableFreeSpace;
         }
         catch (Exception ex)
         {
-            Logger.LogWarning(ex, "Could not determine drive size for Storage Folder {folder}", _configService.Current.CacheFolder);
+            Logger.LogWarning(ex, "Could not determine drive size for storage folder {folder}", _configService.Current.CacheFolder);
         }
 
-        var files = Directory.EnumerateFiles(_configService.Current.CacheFolder).Select(f => new FileInfo(f))
-            .OrderBy(f => f.LastAccessTime).ToList();
-        FileCacheSize = files
-            .Sum(f =>
-            {
-                token.ThrowIfCancellationRequested();
+        var files = Directory.EnumerateFiles(_configService.Current.CacheFolder)
+            .Select(f => new FileInfo(f))
+            .OrderBy(f => f.LastAccessTime)
+            .ToList();
 
-                try
+        long totalSize = 0;
+
+        foreach (var f in files)
+        {
+            token.ThrowIfCancellationRequested();
+
+            try
+            {
+                long size = 0;
+
+                if (!isWine)
                 {
-                    return _fileCompactor.GetFileSizeOnDisk(f, StorageisNTFS);
+                    try
+                    {
+                        size = _fileCompactor.GetFileSizeOnDisk(f);
+                    }
+                    catch (Exception ex)
+                    {
+                        Logger.LogTrace(ex, "GetFileSizeOnDisk failed for {file}, using fallback length", f.FullName);
+                        size = f.Length;
+                    }
                 }
-                catch
+                else
                 {
-                    return 0;
+                    size = f.Length;
                 }
-            });
+
+                totalSize += size;
+            }
+            catch (Exception ex)
+            {
+                Logger.LogTrace(ex, "Error getting size for {file}", f.FullName);
+            }
+        }
+
+        FileCacheSize = totalSize;
 
         var maxCacheInBytes = (long)(_configService.Current.MaxLocalCacheInGiB * 1024d * 1024d * 1024d);
-
-        if (FileCacheSize < maxCacheInBytes) return;
+        if (FileCacheSize < maxCacheInBytes)
+            return;
 
         var maxCacheBuffer = maxCacheInBytes * 0.05d;
-        while (FileCacheSize > maxCacheInBytes - (long)maxCacheBuffer)
+
+        while (FileCacheSize > maxCacheInBytes - (long)maxCacheBuffer && files.Count > 0)
         {
             var oldestFile = files[0];
-            FileCacheSize -= _fileCompactor.GetFileSizeOnDisk(oldestFile);
-            File.Delete(oldestFile.FullName);
-            files.Remove(oldestFile);
+
+            try
+            {
+                long fileSize = oldestFile.Length;
+                File.Delete(oldestFile.FullName);
+                FileCacheSize -= fileSize;
+            }
+            catch (Exception ex)
+            {
+                Logger.LogTrace(ex, "Failed to delete old file {file}", oldestFile.FullName);
+            }
+
+            files.RemoveAt(0);
         }
     }
 
@@ -644,44 +698,44 @@ public sealed class CacheMonitor : DisposableMediatorSubscriberBase
 
         if (ct.IsCancellationRequested) return;
 
-        // scan new files
-        if (allScannedFiles.Any(c => !c.Value))
+        var newFiles = allScannedFiles.Where(c => !c.Value).Select(c => c.Key).ToList();
+        foreach (var cachePath in newFiles)
         {
-            Parallel.ForEach(allScannedFiles.Where(c => !c.Value).Select(c => c.Key),
-                new ParallelOptions()
-                {
-                    MaxDegreeOfParallelism = threadCount,
-                    CancellationToken = ct
-                }, (cachePath) =>
-                {
-                    if (_fileDbManager == null || _ipcManager?.Penumbra == null || cachePath == null)
-                    {
-                        Logger.LogTrace("Potential null in db: {isDbNull} penumbra: {isPenumbraNull} cachepath: {isPathNull}", _fileDbManager == null, _ipcManager?.Penumbra == null, cachePath == null);
-                        return;
-                    }
+            if (ct.IsCancellationRequested) break;
+            ProcessOne(cachePath);
+            Interlocked.Increment(ref _currentFileProgress);
+        }
 
-                    if (ct.IsCancellationRequested) return;
+        Logger.LogTrace("Scanner added {count} new files to db", newFiles.Count);
 
-                    if (!_ipcManager.Penumbra.APIAvailable)
-                    {
-                        Logger.LogWarning("Penumbra not available");
-                        return;
-                    }
+        void ProcessOne(string? cachePath)
+        {
+            if (_fileDbManager == null || _ipcManager?.Penumbra == null || cachePath == null)
+            {
+                Logger.LogTrace("Potential null in db: {isDbNull} penumbra: {isPenumbraNull} cachepath: {isPathNull}",
+                    _fileDbManager == null, _ipcManager?.Penumbra == null, cachePath == null);
+                return;
+            }
 
-                    try
-                    {
-                        var entry = _fileDbManager.CreateFileEntry(cachePath);
-                        if (entry == null) _ = _fileDbManager.CreateCacheEntry(cachePath);
-                    }
-                    catch (Exception ex)
-                    {
-                        Logger.LogWarning(ex, "Failed adding {file}", cachePath);
-                    }
+            if (!_ipcManager.Penumbra.APIAvailable)
+            {
+                Logger.LogWarning("Penumbra not available");
+                return;
+            }
 
-                    Interlocked.Increment(ref _currentFileProgress);
-                });
-
-            Logger.LogTrace("Scanner added {notScanned} new files to db", allScannedFiles.Count(c => !c.Value));
+            try
+            {
+                var entry = _fileDbManager.CreateFileEntry(cachePath);
+                if (entry == null) _ = _fileDbManager.CreateCacheEntry(cachePath);
+            }
+            catch (IOException ioex)
+            {
+                Logger.LogDebug(ioex, "File busy or locked: {file}", cachePath);
+            }
+            catch (Exception ex)
+            {
+                Logger.LogWarning(ex, "Failed adding {file}", cachePath);
+            }
         }
 
         Logger.LogDebug("Scan complete");

LightlessSync/FileCache/FileCacheManager.cs

@@ -203,42 +203,72 @@ public sealed class FileCacheManager : IHostedService
         return output;
     }
 
-    public Task<List<FileCacheEntity>> ValidateLocalIntegrity(IProgress<(int, int, FileCacheEntity)> progress, CancellationToken cancellationToken)
+    public async Task<List<FileCacheEntity>> ValidateLocalIntegrity(IProgress<(int completed, int total, FileCacheEntity current)> progress, CancellationToken cancellationToken)
     {
         _lightlessMediator.Publish(new HaltScanMessage(nameof(ValidateLocalIntegrity)));
         _logger.LogInformation("Validating local storage");
-        var cacheEntries = _fileCaches.Values.SelectMany(v => v.Values.Where(e => e != null)).Where(v => v.IsCacheEntry).ToList();
-        List<FileCacheEntity> brokenEntities = [];
-        int i = 0;
-        foreach (var fileCache in cacheEntries)
+
+        var cacheEntries = _fileCaches.Values
+            .SelectMany(v => v.Values)
+            .Where(v => v.IsCacheEntry)
+            .ToList();
+
+        int total = cacheEntries.Count;
+        int processed = 0;
+        var brokenEntities = new ConcurrentBag<FileCacheEntity>();
+
+        _logger.LogInformation("Checking {count} cache entries...", total);
+
+        await Parallel.ForEachAsync(cacheEntries, new ParallelOptions
+        {
+            MaxDegreeOfParallelism = Environment.ProcessorCount,
+            CancellationToken = cancellationToken
+        },
+        async (fileCache, token) =>
         {
-            if (cancellationToken.IsCancellationRequested) break;
-
-            _logger.LogInformation("Validating {file}", fileCache.ResolvedFilepath);
-
-            progress.Report((i, cacheEntries.Count, fileCache));
-            i++;
-            if (!File.Exists(fileCache.ResolvedFilepath))
-            {
-                brokenEntities.Add(fileCache);
-                continue;
-            }
-
             try
             {
-                var computedHash = Crypto.GetFileHash(fileCache.ResolvedFilepath);
+                int current = Interlocked.Increment(ref processed);
+                if (current % 10 == 0)
+                    progress.Report((current, total, fileCache));
+
+                if (!File.Exists(fileCache.ResolvedFilepath))
+                {
+                    brokenEntities.Add(fileCache);
+                    return;
+                }
+
+                string computedHash;
+                try
+                {
+                    computedHash = await Crypto.GetFileHashAsync(fileCache.ResolvedFilepath, token).ConfigureAwait(false);
+                }
+                catch (Exception ex)
+                {
+                    _logger.LogWarning(ex, "Error hashing {file}", fileCache.ResolvedFilepath);
+                    brokenEntities.Add(fileCache);
+                    return;
+                }
+
                 if (!string.Equals(computedHash, fileCache.Hash, StringComparison.Ordinal))
                 {
-                    _logger.LogInformation("Failed to validate {file}, got hash {computedHash}, expected hash {hash}", fileCache.ResolvedFilepath, computedHash, fileCache.Hash);
+                    _logger.LogInformation(
+                        "Hash mismatch: {file} (got {computedHash}, expected {expected})",
+                        fileCache.ResolvedFilepath, computedHash, fileCache.Hash);
+
                     brokenEntities.Add(fileCache);
                 }
             }
-            catch (Exception e)
+            catch (OperationCanceledException)
             {
-                _logger.LogWarning(e, "Error during validation of {file}", fileCache.ResolvedFilepath);
+                _logger.LogError("Validation got cancelled for {file}", fileCache.ResolvedFilepath);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Unexpected error validating {file}", fileCache.ResolvedFilepath);
                 brokenEntities.Add(fileCache);
             }
-        }
+        }).ConfigureAwait(false);
 
         foreach (var brokenEntity in brokenEntities)
         {
@@ -250,12 +280,14 @@ public sealed class FileCacheManager : IHostedService
             }
             catch (Exception ex)
             {
-                _logger.LogWarning(ex, "Could not delete {file}", brokenEntity.ResolvedFilepath);
+                _logger.LogWarning(ex, "Failed to delete invalid cache file {file}", brokenEntity.ResolvedFilepath);
             }
         }
 
         _lightlessMediator.Publish(new ResumeScanMessage(nameof(ValidateLocalIntegrity)));
-        return Task.FromResult(brokenEntities);
+        _logger.LogInformation("Validation complete. Found {count} invalid entries.", brokenEntities.Count);
+
+        return [.. brokenEntities];
     }
 
     public string GetCacheFilePath(string hash, string extension)

LightlessSync/LightlessConfiguration/Models/ServerStorage.cs

@@ -13,5 +13,4 @@ public class ServerStorage
     public bool UseOAuth2 { get; set; } = false;
     public string? OAuthToken { get; set; } = null;
     public HttpTransportType HttpTransportType { get; set; } = HttpTransportType.WebSockets;
-    public bool ForceWebSockets { get; set; } = false;
 }

LightlessSync/UI/SettingsUi.cs

@@ -1227,16 +1227,16 @@ public class SettingsUi : WindowMediatorSubscriberBase
             ImGui.TextUnformatted($"Currently utilized local storage: Calculating...");
         ImGui.TextUnformatted(
             $"Remaining space free on drive: {UiSharedService.ByteToString(_cacheMonitor.FileCacheDriveFree)}");
+
         bool useFileCompactor = _configService.Current.UseCompactor;
-        bool isLinux = _dalamudUtilService.IsWine;
-        if (!useFileCompactor && !isLinux)
+        if (!useFileCompactor)
         {
             UiSharedService.ColorTextWrapped(
                 "Hint: To free up space when using Lightless consider enabling the File Compactor",
                 UIColors.Get("LightlessYellow"));
         }
 
-        if (isLinux || !_cacheMonitor.StorageisNTFS) ImGui.BeginDisabled();
+        if (!_cacheMonitor.StorageIsBtrfs && !_cacheMonitor.StorageisNTFS) ImGui.BeginDisabled();
         if (ImGui.Checkbox("Use file compactor", ref useFileCompactor))
         {
             _configService.Current.UseCompactor = useFileCompactor;
@@ -1281,10 +1281,20 @@ public class SettingsUi : WindowMediatorSubscriberBase
                 UIColors.Get("LightlessYellow"));
         }
 
-        if (isLinux || !_cacheMonitor.StorageisNTFS)
+        if (!_cacheMonitor.StorageIsBtrfs && !_cacheMonitor.StorageisNTFS)
         {
             ImGui.EndDisabled();
-            ImGui.TextUnformatted("The file compactor is only available on Windows and NTFS drives.");
+            ImGui.TextUnformatted("The file compactor is only available on BTRFS and NTFS drives.");
+        }
+
+        if (_cacheMonitor.StorageisNTFS)
+        {
+            ImGui.TextUnformatted("The file compactor is running on NTFS Drive.");
+        }
+
+        if (_cacheMonitor.StorageIsBtrfs)
+        {
+            ImGui.TextUnformatted("The file compactor is running on Btrfs Drive.");
         }
 
         ImGuiHelpers.ScaledDummy(new Vector2(10, 10));
@@ -3113,22 +3123,6 @@ public class SettingsUi : WindowMediatorSubscriberBase
                     UiSharedService.TooltipSeparator
                     + "Note: if the server does not support a specific Transport Type it will fall through to the next automatically: WebSockets > ServerSentEvents > LongPolling");
 
-                if (_dalamudUtilService.IsWine)
-                {
-                    bool forceWebSockets = selectedServer.ForceWebSockets;
-                    if (ImGui.Checkbox("[wine only] Force WebSockets", ref forceWebSockets))
-                    {
-                        selectedServer.ForceWebSockets = forceWebSockets;
-                        _serverConfigurationManager.Save();
-                    }
-
-                    _uiShared.DrawHelpText(
-                        "On wine, Lightless will automatically fall back to ServerSentEvents/LongPolling, even if WebSockets is selected. "
-                        + "WebSockets are known to crash XIV entirely on wine 8.5 shipped with Dalamud. "
-                        + "Only enable this if you are not running wine 8.5." + Environment.NewLine
-                        + "Note: If the issue gets resolved at some point this option will be removed.");
-                }
-
                 ImGuiHelpers.ScaledDummy(5);
 
                 if (ImGui.Checkbox("Use Discord OAuth2 Authentication", ref useOauth))

LightlessSync/Utils/Crypto.cs

@@ -1,16 +1,15 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Security.Cryptography;
+using System.Security.Cryptography;
 using System.Text;
 
 namespace LightlessSync.Utils;
 
 public static class Crypto
 {
+    //This buffersize seems to be the best sweetpoint for Linux and Windows
+    private const int _bufferSize = 65536;
 #pragma warning disable SYSLIB0021 // Type or member is obsolete
 
-    private static readonly Dictionary<(string, ushort), string> _hashListPlayersSHA256 = new();
+    private static readonly Dictionary<(string, ushort), string> _hashListPlayersSHA256 = [];
     private static readonly Dictionary<string, string> _hashListSHA256 = new(StringComparer.Ordinal);
     private static readonly SHA256CryptoServiceProvider _sha256CryptoProvider = new();
 
@@ -21,6 +20,26 @@ public static class Crypto
         return BitConverter.ToString(sha1.ComputeHash(stream)).Replace("-", "", StringComparison.Ordinal);
     }
 
+    public static async Task<string> GetFileHashAsync(string filePath, CancellationToken cancellationToken = default)
+    {
+        var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete, bufferSize: _bufferSize, options: FileOptions.Asynchronous);
+        await using (stream.ConfigureAwait(false))
+        {
+            using var sha1 = SHA1.Create();
+
+            var buffer = new byte[8192];
+            int bytesRead;
+            while ((bytesRead = await stream.ReadAsync(buffer, cancellationToken).ConfigureAwait(false)) > 0)
+            {
+                sha1.TransformBlock(buffer, 0, bytesRead, outputBuffer: null, 0);
+            }
+
+            sha1.TransformFinalBlock([], 0, 0);
+
+            return Convert.ToHexString(sha1.Hash!);
+        }
+    }
+
     public static string GetHash256(this (string, ushort) playerToHash)
     {
         if (_hashListPlayersSHA256.TryGetValue(playerToHash, out var hash))

LightlessSync/Utils/FileSystemHelper.cs

@@ -0,0 +1,282 @@
+using Microsoft.Extensions.Logging;
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace LightlessSync.Utils
+{
+    public static class FileSystemHelper
+    {
+        public enum FilesystemType
+        {
+            Unknown = 0,
+            NTFS, // Compressable on file level
+            Btrfs, // Compressable on file level
+            Ext4, // Uncompressable
+            Xfs, // Uncompressable
+            Apfs, // Compressable on OS
+            HfsPlus, // Compressable on OS
+            Fat, // Uncompressable
+            Exfat, // Uncompressable
+            Zfs // Compressable, not on file level
+        }
+
+        private const string _mountPath = "/proc/mounts";
+        private const int _defaultBlockSize = 4096;
+        private static readonly Dictionary<string, int> _blockSizeCache = new(StringComparer.OrdinalIgnoreCase);
+        private static readonly ConcurrentDictionary<string, FilesystemType> _filesystemTypeCache = new(StringComparer.OrdinalIgnoreCase);
+
+        public static FilesystemType GetFilesystemType(string filePath, bool isWine = false)
+        {
+            try
+            {
+                string rootPath;
+
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) && (!IsProbablyWine() || !isWine))
+                {
+                    var info = new FileInfo(filePath);
+                    var dir = info.Directory ?? new DirectoryInfo(filePath);
+                    rootPath = dir.Root.FullName;
+                }
+                else
+                {
+                    rootPath = GetMountPoint(filePath);
+                    if (string.IsNullOrEmpty(rootPath))
+                        rootPath = "/";
+                }
+
+                if (_filesystemTypeCache.TryGetValue(rootPath, out var cachedType))
+                    return cachedType;
+
+                FilesystemType detected;
+
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) && (!IsProbablyWine() || !isWine))
+                {
+                    var root = new DriveInfo(rootPath);
+                    var format = root.DriveFormat?.ToUpperInvariant() ?? string.Empty;
+
+                    detected = format switch
+                    {
+                        "NTFS" => FilesystemType.NTFS,
+                        "FAT32" => FilesystemType.Fat,
+                        "EXFAT" => FilesystemType.Exfat,
+                        _ => FilesystemType.Unknown
+                    };
+                }
+                else
+                {
+                    detected = GetLinuxFilesystemType(filePath);
+                }
+
+                if (isWine || IsProbablyWine())
+                {
+                    switch (detected)
+                    {
+                        case FilesystemType.NTFS:
+                        case FilesystemType.Unknown:
+                            {
+                                var linuxDetected = GetLinuxFilesystemType(filePath);
+                                if (linuxDetected != FilesystemType.Unknown)
+                                {
+                                    detected = linuxDetected;
+                                }
+
+                                break;
+                            }
+                    }
+                }
+
+                _filesystemTypeCache[rootPath] = detected;
+                return detected;
+            }
+            catch
+            {
+                return FilesystemType.Unknown;
+            }
+        }
+
+        private static string GetMountPoint(string filePath)
+        {
+            try
+            {
+                var path = Path.GetFullPath(filePath);
+                if (!File.Exists(_mountPath)) return "/";
+                var mounts = File.ReadAllLines(_mountPath);
+
+                string bestMount = "/";
+                foreach (var line in mounts)
+                {
+                    var parts = line.Split(' ');
+                    if (parts.Length < 3) continue;
+                    var mountPoint = parts[1].Replace("\\040", " ", StringComparison.Ordinal);
+
+                    string normalizedMount;
+                    try { normalizedMount = Path.GetFullPath(mountPoint); }
+                    catch { normalizedMount = mountPoint; }
+
+                    if (path.StartsWith(normalizedMount, StringComparison.Ordinal) &&
+                        normalizedMount.Length > bestMount.Length)
+                    {
+                        bestMount = normalizedMount;
+                    }
+                }
+
+                return bestMount;
+            }
+            catch
+            {
+                return "/";
+            }
+        }
+
+        public static 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)
+            {
+                return string.Empty;
+            }
+        }
+
+        private static FilesystemType GetLinuxFilesystemType(string filePath)
+        {
+            try
+            {
+                var mountPoint = GetMountPoint(filePath);
+                var mounts = File.ReadAllLines(_mountPath);
+
+                foreach (var line in mounts)
+                {
+                    var parts = line.Split(' ');
+                    if (parts.Length < 3) continue;
+                    var mount = parts[1].Replace("\\040", " ", StringComparison.Ordinal);
+                    if (string.Equals(mount, mountPoint, StringComparison.Ordinal))
+                    {
+                        var fstype = parts[2].ToLowerInvariant();
+                        return fstype switch
+                        {
+                            "btrfs" => FilesystemType.Btrfs,
+                            "ext4" => FilesystemType.Ext4,
+                            "xfs" => FilesystemType.Xfs,
+                            "zfs" => FilesystemType.Zfs,
+                            "apfs" => FilesystemType.Apfs,
+                            "hfsplus" => FilesystemType.HfsPlus,
+                            _ => FilesystemType.Unknown
+                        };
+                    }
+                }
+
+                return FilesystemType.Unknown;
+            }
+            catch
+            {
+                return FilesystemType.Unknown;
+            }
+        }
+
+        public static int GetBlockSizeForPath(string path, ILogger? logger = null, bool isWine = false)
+        {
+            try
+            {
+                if (string.IsNullOrWhiteSpace(path))
+                    return _defaultBlockSize;
+
+                var fi = new FileInfo(path);
+                if (!fi.Exists)
+                    return _defaultBlockSize;
+
+                var root = fi.Directory?.Root.FullName.ToLowerInvariant() ?? "/";
+                if (_blockSizeCache.TryGetValue(root, out int cached))
+                    return cached;
+
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) && !isWine)
+                {
+                    int result = GetDiskFreeSpaceW(root,
+                        out uint sectorsPerCluster,
+                        out uint bytesPerSector,
+                        out _,
+                        out _);
+
+                    if (result == 0)
+                    {
+                        logger?.LogWarning("Failed to determine block size for {root}", root);
+                        return _defaultBlockSize;
+                    }
+
+                    int clusterSize = (int)(sectorsPerCluster * bytesPerSector);
+                    _blockSizeCache[root] = clusterSize;
+                    logger?.LogTrace("NTFS cluster size for {root}: {cluster}", root, clusterSize);
+                    return clusterSize;
+                }
+
+                string realPath = fi.FullName;
+                if (isWine && realPath.StartsWith("Z:\\", StringComparison.OrdinalIgnoreCase))
+                {
+                    realPath = "/" + realPath.Substring(3).Replace('\\', '/');
+                }
+
+                var psi = new ProcessStartInfo
+                {
+                    FileName = "/bin/bash",
+                    Arguments = $"-c \"stat -f -c %s '{realPath.Replace("'", "'\\''")}'\"",
+                    RedirectStandardOutput = true,
+                    RedirectStandardError = true,
+                    UseShellExecute = false,
+                    CreateNoWindow = true,
+                    WorkingDirectory = "/"
+                };
+
+                using var proc = Process.Start(psi);
+                string stdout = proc?.StandardOutput.ReadToEnd().Trim() ?? "";
+                proc?.WaitForExit();
+
+                if (int.TryParse(stdout, out int blockSize) && blockSize > 0)
+                {
+                    _blockSizeCache[root] = blockSize;
+                    logger?.LogTrace("Filesystem block size via stat for {root}: {block}", root, blockSize);
+                    return blockSize;
+                }
+
+                logger?.LogTrace("stat did not return valid block size for {file}, output: {out}", fi.FullName, stdout);
+                _blockSizeCache[root] = _defaultBlockSize;
+                return _defaultBlockSize;
+            }
+            catch (Exception ex)
+            {
+                logger?.LogTrace(ex, "Error determining block size for {path}", path);
+                return _defaultBlockSize;
+            }
+        }
+
+        [DllImport("kernel32.dll", SetLastError = true, PreserveSig = true)]
+        private static extern int GetDiskFreeSpaceW([In, MarshalAs(UnmanagedType.LPWStr)] string lpRootPathName, out uint lpSectorsPerCluster, out uint lpBytesPerSector, out uint lpNumberOfFreeClusters, out uint lpTotalNumberOfClusters);
+
+        //Extra check on 
+        public static bool IsProbablyWine() => Environment.GetEnvironmentVariable("WINELOADERNOEXEC") != null || Environment.GetEnvironmentVariable("WINEDLLPATH") != null || Directory.Exists("/proc/self") && File.Exists("/proc/mounts");
+    }
+}

LightlessSync/WebAPI/SignalR/HubFactory.cs

@@ -70,13 +70,6 @@ public class HubFactory : MediatorSubscriberBase
             _ => HttpTransportType.WebSockets | HttpTransportType.ServerSentEvents | HttpTransportType.LongPolling
         };
 
-        if (_isWine && !_serverConfigurationManager.CurrentServer.ForceWebSockets
-            && transportType.HasFlag(HttpTransportType.WebSockets))
-        {
-            Logger.LogDebug("Wine detected, falling back to ServerSentEvents / LongPolling");
-            transportType = HttpTransportType.ServerSentEvents | HttpTransportType.LongPolling;
-        }
-
         Logger.LogDebug("Building new HubConnection using transport {transport}", transportType);
 
         _instance = new HubConnectionBuilder()