[hpoussin] 47365: [freeldr] Repair NTFS driver. ReactOS is now able to boot (again) from NTFS partitions

Author: hpoussin
Date: Wed May 26 21:58:54 2010
New Revision: 47365

URL: http://svn.reactos.org/svn/reactos?rev=47365&view=rev
Log:
[freeldr] Repair NTFS driver. ReactOS is now able to boot (again) from NTFS partitions

Modified:
    trunk/reactos/boot/freeldr/freeldr/fs/ntfs.c

Modified: trunk/reactos/boot/freeldr/freeldr/fs/ntfs.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/boot/freeldr/freeldr/fs/ntf...
==============================================================================
--- trunk/reactos/boot/freeldr/freeldr/fs/ntfs.c [iso-8859-1] (original)
+++ trunk/reactos/boot/freeldr/freeldr/fs/ntfs.c [iso-8859-1] Wed May 26 21:58:54 2010
@@ -1,6 +1,7 @@
 /*
  *  FreeLoader NTFS support
  *  Copyright (C) 2004  Filip Navara  [e-mail]
+ *  Copyright (C) 2009-2010  Hervé Poussineau
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -37,6 +38,7 @@
     /* FIXME: MFTContext is never freed. */
     PNTFS_ATTR_CONTEXT MFTContext;
     ULONG DeviceId;
+    PUCHAR TemporarySector;
 } NTFS_VOLUME_INFO;

PNTFS_VOLUME_INFO NtfsVolumes[MAX_FDS];
@@ -147,10 +149,17 @@
         ret = ArcSeek(Volume->DeviceId, &Position, SeekAbsolute);
         if (ret != ESUCCESS)
             return FALSE;
+        ret = ArcRead(Volume->DeviceId, Volume->TemporarySector, Volume->BootSector.BytesPerSector, &Count);
+        if (ret != ESUCCESS || Count != Volume->BootSector.BytesPerSector)
+            return FALSE;
         ReadLength = min(Length, Volume->BootSector.BytesPerSector - (Offset % Volume->BootSector.BytesPerSector));
-        ret = ArcRead(Volume->DeviceId, Buffer, ReadLength, &Count);
-        if (ret != ESUCCESS || Count != ReadLength)
-            return FALSE;
+
+        //
+        // Copy interesting data
+        //
+        RtlCopyMemory(Buffer,
+                      &Volume->TemporarySector[Offset % Volume->BootSector.BytesPerSector],
+                      ReadLength);

//
         // Move to unfilled buffer part
@@ -792,6 +801,7 @@
         return ENOENT;
     }

+    FsSetDeviceSpecific(*FileId, FileHandle);
     return ESUCCESS;
 }

@@ -933,6 +943,18 @@
     }

//
+    // Keep room to read partial sectors
+    //
+    Volume->TemporarySector = MmHeapAlloc(Volume->BootSector.BytesPerSector);
+    if (!Volume->TemporarySector)
+    {
+        FileSystemError("Failed to allocate memory.");
+        MmHeapFree(Volume->MasterFileTable);
+        MmHeapFree(Volume);
+        return NULL;
+    }
+
+    //
     // Keep device id
     //
     Volume->DeviceId = DeviceId;