EFI_FFS_FILE_HEADER2 Struct Reference

Data Fields
EFI_GUID	Name
EFI_FFS_INTEGRITY_CHECK	IntegrityCheck
EFI_FV_FILETYPE	Type
EFI_FFS_FILE_ATTRIBUTES	Attributes
UINT8	Size [3]
EFI_FFS_FILE_STATE	State
UINT64	ExtendedSize

Field Documentation

EFI_FFS_FILE_ATTRIBUTES EFI_FFS_FILE_HEADER2::Attributes

Declares various file attribute bits.

UINT64 EFI_FFS_FILE_HEADER2::ExtendedSize

If FFS_ATTRIB_LARGE_FILE is set in Attributes, then ExtendedSize exists and Size must be set to zero. If FFS_ATTRIB_LARGE_FILE is not set then EFI_FFS_FILE_HEADER is used.

EFI_FFS_INTEGRITY_CHECK EFI_FFS_FILE_HEADER2::IntegrityCheck

Used to verify the integrity of the file.

EFI_GUID EFI_FFS_FILE_HEADER2::Name

This GUID is the file name. It is used to uniquely identify the file. There may be only one instance of a file with the file name GUID of Name in any given firmware volume, except if the file type is EFI_FV_FILETYPE_FFS_PAD.

UINT8 EFI_FFS_FILE_HEADER2::Size[3]

The length of the file in bytes, including the FFS header. The length of the file data is either (Size - sizeof(EFI_FFS_FILE_HEADER)). This calculation means a zero-length file has a Size of 24 bytes, which is sizeof(EFI_FFS_FILE_HEADER). Size is not required to be a multiple of 8 bytes. Given a file F, the next file header is located at the next 8-byte aligned firmware volume offset following the last byte of the file F.

EFI_FFS_FILE_STATE EFI_FFS_FILE_HEADER2::State

Used to track the state of the file throughout the life of the file from creation to deletion.

EFI_FV_FILETYPE EFI_FFS_FILE_HEADER2::Type

Identifies the type of file.