EFIAPI
EFI_STATUS
BootMonFsGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
BOOTMON_FS_FILE *File;
BOOTMON_FS_INSTANCE *Instance;
if ((This == NULL) ||
(InformationType == NULL) ||
(BufferSize == NULL) ||
((Buffer == NULL) && (*BufferSize > 0)) ) {
return EFI_INVALID_PARAMETER;
}
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (File->Info == NULL) {
return EFI_INVALID_PARAMETER;
}
Instance = File->Instance;
// If the instance has not been initialized yet then do it ...
if (!Instance->Initialized) {
Status = BootMonFsInitialize (Instance);
} else {
Status = EFI_SUCCESS;
}
if (!EFI_ERROR (Status)) {
if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)
!= 0) {
Status = GetFileSystemVolumeLabelInfo (Instance, BufferSize, Buffer);
} else if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid) != 0) {
Status = GetFilesystemInfo (Instance, BufferSize, Buffer);
} else if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {
Status = GetFileInfo (Instance, File, BufferSize, Buffer);
} else if (CompareGuid (InformationType, &gArmBootMonFsFileInfoGuid) != 0) {
Status = GetBootMonFsFileInfo (Instance, File, BufferSize, Buffer);
} else {
Status = EFI_UNSUPPORTED;
}
}
return Status;
}
/**
Opens a file on the Nor Flash FS volume
Calls BootMonFsGetFileFromAsciiFilename to search the list of tracked files.
@param This The EFI_FILE_PROTOCOL parent handle.
@param NewHandle Double-pointer to the newly created protocol.
@param FileName The name of the image/metadata on flash
@param OpenMode Read,write,append etc
@param Attributes ?
@return EFI_STATUS
OUT_OF_RESOURCES
Run out of space to keep track of the allocated structures
DEVICE_ERROR
Unable to locate the volume associated with the parent file handle
NOT_FOUND
Filename wasn't found on flash
SUCCESS
**/
EFIAPI
EFI_STATUS
BootMonFsOpenFile (
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
BOOTMON_FS_FILE *Directory;
BOOTMON_FS_FILE *File;
BOOTMON_FS_INSTANCE *Instance;
CHAR8* AsciiFileName;
EFI_STATUS Status;
if ((FileName == NULL) || (NewHandle == NULL)) {
return EFI_INVALID_PARAMETER;
}
// The only valid modes are read, read/write, and read/write/create
if (!(OpenMode & EFI_FILE_MODE_READ) || ((OpenMode & EFI_FILE_MODE_CREATE) && !(OpenMode & EFI_FILE_MODE_WRITE))) {
return EFI_INVALID_PARAMETER;
}
Directory = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
if (Directory == NULL) {
return EFI_DEVICE_ERROR;
}
Instance = Directory->Instance;
// If the instance has not been initialized it yet then do it ...
if (!Instance->Initialized) {
Status = BootMonFsInitialize (Instance);
if (EFI_ERROR (Status)) {
return Status;
}
}
// BootMonFs interface requires ASCII filenames
AsciiFileName = AllocatePool ((StrLen (FileName) + 1) * sizeof (CHAR8));
if (AsciiFileName == NULL) {
return EFI_OUT_OF_RESOURCES;
}
UnicodeStrToAsciiStr (FileName, AsciiFileName);
if ((AsciiStrCmp (AsciiFileName, "\\") == 0) ||
(AsciiStrCmp (AsciiFileName, "/") == 0) ||
(AsciiStrCmp (AsciiFileName, "") == 0) ||
(AsciiStrCmp (AsciiFileName, ".") == 0))
{
//
// Opening '/', '\', '.', or the NULL pathname is trying to open the root directory
//
*NewHandle = &Instance->RootFile->File;
Instance->RootFile->Position = 0;
Status = EFI_SUCCESS;
} else {
//
// Open or Create a regular file
//
// Check if the file already exists
Status = BootMonGetFileFromAsciiFileName (Instance, AsciiFileName, &File);
if (Status == EFI_NOT_FOUND) {
// The file doesn't exist.
if (OpenMode & EFI_FILE_MODE_CREATE) {
// If the file does not exist but is required then create it.
if (Attributes & EFI_FILE_DIRECTORY) {
// BootMonFS doesn't support subdirectories
Status = EFI_UNSUPPORTED;
} else {
// Create a new file
Status = CreateNewFile (Instance, AsciiFileName, &File);
if (!EFI_ERROR (Status)) {
File->OpenMode = OpenMode;
*NewHandle = &File->File;
File->Position = 0;
}
}
}
} else if (Status == EFI_SUCCESS) {
// The file exists
File->OpenMode = OpenMode;
*NewHandle = &File->File;
File->Position = 0;
}
}
FreePool (AsciiFileName);
return Status;
}
