[JFS] Implement statfs.

Aaru.Filesystems/JFS/Consts.cs

@@ -38,6 +38,9 @@ public sealed partial class JFS
     const string FS_TYPE     = "jfs";
     const string MODULE_NAME = "JFS plugin";
 
+    /// <summary>Maximum filename length in JFS</summary>
+    const ushort JFS_NAME_MAX = 255;
+
     /// <summary>Byte offset of the aggregate inode table (AITBL_OFF)</summary>
     const long AITBL_OFF = 0xB000;
 

Aaru.Filesystems/JFS/Super.cs

@@ -0,0 +1,63 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : Super.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : IBM JFS filesystem plugin
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library is distributed in the hope that it will be useful, but
+//     WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2026 Natalia Portillo
+// ****************************************************************************/
+
+using Aaru.CommonTypes.Enums;
+using Aaru.CommonTypes.Structs;
+
+namespace Aaru.Filesystems;
+
+/// <inheritdoc />
+/// <summary>Implements detection of IBM's Journaled File System</summary>
+public sealed partial class JFS
+{
+    /// <inheritdoc />
+    public ErrorNumber StatFs(out FileSystemInfo stat)
+    {
+        stat = null;
+
+        if(!_mounted) return ErrorNumber.AccessDenied;
+
+        stat = new FileSystemInfo
+        {
+            Blocks         = _superblock.s_size / _superblock.s_bsize,
+            FilenameLength = JFS_NAME_MAX,
+            FreeBlocks     = 0, // Would require parsing the block allocation map
+            Files          = 0, // Would require parsing the inode allocation map
+            FreeFiles      = 0, // Would require parsing the inode allocation map
+            PluginId       = Id,
+            Type           = FS_TYPE,
+            Id =
+            {
+                IsGuid = true,
+                uuid   = _superblock.s_uuid
+            }
+        };
+
+        return ErrorNumber.NoError;
+    }
+}

Aaru.Filesystems/JFS/Unimplemented.cs

@@ -29,16 +29,11 @@
 using System;
 using Aaru.CommonTypes.Enums;
 using Aaru.CommonTypes.Interfaces;
-using Aaru.CommonTypes.Structs;
 
 namespace Aaru.Filesystems;
 
 public sealed partial class JFS
 {
-    /// <inheritdoc />
-    public ErrorNumber StatFs(out FileSystemInfo stat) => throw new NotImplementedException();
-
-
     /// <inheritdoc />
     public ErrorNumber ReadLink(string path, out string dest) => throw new NotImplementedException();