OpenVolume.c

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#include "Fat.h"
 
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;
}