59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
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/** @file
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OpenVolume() function of Simple File System Protocol.
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Copyright (c) 2005 - 2013, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "Fat.h"
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/**
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Implements Simple File System Protocol interface function OpenVolume().
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@param This - Calling context.
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@param File - the Root Directory of the volume.
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@retval EFI_OUT_OF_RESOURCES - Can not allocate the memory.
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@retval EFI_VOLUME_CORRUPTED - The FAT type is error.
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@retval EFI_SUCCESS - Open the volume successfully.
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**/
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EFI_STATUS
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EFIAPI
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FatOpenVolume (
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IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
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OUT EFI_FILE_PROTOCOL **File
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)
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{
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EFI_STATUS Status;
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FAT_VOLUME *Volume;
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FAT_IFILE *IFile;
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Volume = VOLUME_FROM_VOL_INTERFACE (This);
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FatAcquireLock ();
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//
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// Open Root file
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//
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Status = FatOpenDirEnt (NULL, &Volume->RootDirEnt);
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if (EFI_ERROR (Status)) {
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goto Done;
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}
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//
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// Open a new instance to the root
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//
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Status = FatAllocateIFile (Volume->Root, &IFile);
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if (!EFI_ERROR (Status)) {
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*File = &IFile->Handle;
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}
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Done:
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Status = FatCleanupVolume (Volume, Volume->Root, Status, NULL);
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FatReleaseLock ();
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return Status;
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}
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