OvmfPkg/Library/NvVarsFileLib/NvVarsFileLib.c

   1 /** @file
   2   Save Non-Volatile Variables to a file system.
   3
   4   Copyright (c) 2009, Intel Corporation. <BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "NvVarsFileLib.h"
  16 #include <Library/DebugLib.h>
  17 #include <Library/NvVarsFileLib.h>
  18
  19
  20 /**
  21   Attempts to connect the NvVarsFileLib to the specified file system.
  22
  23   @param[in]  FsHandle - Handle for a gEfiSimpleFileSystemProtocolGuid instance
  24
  25   @return     The EFI_STATUS while attempting to connect the NvVarsFileLib
  26               to the file system instance.
  27   @retval     EFI_SUCCESS - The given file system was connected successfully
  28
  29 **/
  30 EFI_STATUS
  31 EFIAPI
  32 ConnectNvVarsToFileSystem (
  33   IN EFI_HANDLE    FsHandle
  34   )
  35 {
  36   EFI_STATUS Status;
  37
  38   //
  39   // We might fail to load the variable, since the file system initially
  40   // will not have the NvVars file.
  41   //
  42   LoadNvVarsFromFs (FsHandle);
  43
  44   //
  45   // We must be able to save the variables successfully to the file system
  46   // to have connected successfully.
  47   //
  48   Status = SaveNvVarsToFs (FsHandle);
  49
  50   return Status;
  51 }
  52
  53