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/** @file
OpenVolume() function of Simple File System Protocol.
Copyright (c) 2005 - 2013, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Fat.h"
/**
Implements Simple File System Protocol interface function OpenVolume().
@param This - Calling context.
@param File - the Root Directory of the volume.
@retval EFI_OUT_OF_RESOURCES - Can not allocate the memory.
@retval EFI_VOLUME_CORRUPTED - The FAT type is error.
@retval EFI_SUCCESS - Open the volume successfully.
**/
EFI_STATUS
EFIAPI
FatOpenVolume (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **File
)
{
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, NULL);
FatReleaseLock ();
return Status;
}
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