From PhoenixWiki

Prototype

typedef UINT8 EFI_FFS_FILE_STATE;

#define EFI_FILE_HEADER_CONSTRUCTION 0x01
#define EFI_FILE_HEADER_VALID        0x02
#define EFI_FILE_DATA_VALID          0x04
#define EFI_FILE_MARKED_FOR_UPDATE   0x08
#define EFI_FILE_DELETED             0x10
#define EFI_FILE_HEADER_INVALID      0x20

All other State bits are reserved and must be set to EFI_FVB_ERASE_POLARITY.

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