1 files changed, 80 insertions, 0 deletions
diff --git a/FatPkg/EnhancedFatDxe/OpenVolume.c b/FatPkg/EnhancedFatDxe/OpenVolume.c
new file mode 100644
index 0000000000..723ee127cd
--- /dev/null
+++ b/FatPkg/EnhancedFatDxe/OpenVolume.c
@@ -0,0 +1,80 @@
+/*++
+
+Copyright (c) 2005, Intel Corporation
+All rights reserved. This program and the accompanying materials are licensed and made available
+under the terms and conditions of the BSD License which accompanies this
+distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+
+Module Name:
+
+  OpenVolume.c
+
+Abstract:
+
+  OpenVolume() function of Simple File System Protocol
+
+Revision History
+
+--*/
+
+#include "Fat.h"
+
+EFI_STATUS
+EFIAPI
+FatOpenVolume (
+  IN  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL  *This,
+  OUT EFI_FILE                         **File
+  )
+/*++
+
+Routine Description:
+
+  Implements Simple File System Protocol interface function OpenVolume().
+
+Arguments:
+
+  This                  - Calling context.
+  File                  - the Root Directory of the volume.
+
+Returns:
+
+  EFI_OUT_OF_RESOURCES  - Can not allocate the memory.
+  EFI_VOLUME_CORRUPTED  - The FAT type is error.
+  EFI_SUCCESS           - Open the volume successfully.
+
+--*/
+{
+  EFI_STATUS  Status;
+  FAT_VOLUME  *Volume;
+  FAT_IFILE   *IFile;
+
+  Volume = VOLUME_FROM_VOL_INTERFACE (This);
+  FatAcquireLock ();
+
+  //
+  // Open Root file
+  //
+  Status = FatOpenDirEnt (NULL, &Volume->RootDirEnt);
+  if (EFI_ERROR (Status)) {
+    goto Done;
+  }
+  //
+  // Open a new instance to the root
+  //
+  Status = FatAllocateIFile (Volume->Root, &IFile);
+  if (!EFI_ERROR (Status)) {
+    *File = &IFile->Handle;
+  }
+
+Done:
+
+  Status = FatCleanupVolume (Volume, Volume->Root, Status);
+  FatReleaseLock ();
+
+  return Status;
+}