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|
/** @file
Handle operations in files and directories from UDF/ECMA-167 file systems.
Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available
under the terms and conditions of the BSD License which accompanies this
distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "Udf.h"
EFI_FILE_PROTOCOL gUdfFileIoOps = {
EFI_FILE_PROTOCOL_REVISION,
UdfOpen,
UdfClose,
UdfDelete,
UdfRead,
UdfWrite,
UdfGetPosition,
UdfSetPosition,
UdfGetInfo,
UdfSetInfo,
UdfFlush,
NULL,
NULL,
NULL,
NULL
};
#define _ROOT_FILE(_PrivData) (_PrivData)->Root
#define _PARENT_FILE(_PrivData) \
((_PrivData)->IsRootDirectory ? (_PrivData)->Root : &(_PrivData)->File)
#define _FILE(_PrivData) _PARENT_FILE(_PrivData)
/**
Open the root directory on a volume.
@param This Protocol instance pointer.
@param Root Returns an Open file handle for the root directory
@retval EFI_SUCCESS The device was opened.
@retval EFI_UNSUPPORTED This volume does not support the file system.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_ACCESS_DENIED The service denied access to the file.
@retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of
resources.
**/
EFI_STATUS
EFIAPI
UdfOpenVolume (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **Root
)
{
EFI_TPL OldTpl;
EFI_STATUS Status;
PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
PRIVATE_UDF_FILE_DATA *PrivFileData;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (This == NULL || Root == NULL) {
Status = EFI_INVALID_PARAMETER;
goto Error_Invalid_Params;
}
PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (This);
if (PrivFsData->OpenFiles == 0) {
//
// There is no more open files. Read volume information again since it was
// cleaned up on the last UdfClose() call.
//
Status = ReadUdfVolumeInformation (
PrivFsData->BlockIo,
PrivFsData->DiskIo,
&PrivFsData->Volume
);
if (EFI_ERROR (Status)) {
goto Error_Read_Udf_Volume;
}
}
CleanupFileInformation (&PrivFsData->Root);
//
// Find root directory file.
//
Status = FindRootDirectory (
PrivFsData->BlockIo,
PrivFsData->DiskIo,
&PrivFsData->Volume,
&PrivFsData->Root
);
if (EFI_ERROR (Status)) {
goto Error_Find_Root_Dir;
}
PrivFileData =
(PRIVATE_UDF_FILE_DATA *) AllocateZeroPool (sizeof (PRIVATE_UDF_FILE_DATA));
if (PrivFileData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Error_Alloc_Priv_File_Data;
}
PrivFileData->Signature = PRIVATE_UDF_FILE_DATA_SIGNATURE;
PrivFileData->SimpleFs = This;
PrivFileData->Root = &PrivFsData->Root;
PrivFileData->IsRootDirectory = TRUE;
CopyMem ((VOID *)&PrivFileData->FileIo, (VOID *)&gUdfFileIoOps,
sizeof (EFI_FILE_PROTOCOL));
*Root = &PrivFileData->FileIo;
PrivFsData->OpenFiles++;
gBS->RestoreTPL (OldTpl);
return EFI_SUCCESS;
Error_Alloc_Priv_File_Data:
CleanupFileInformation (&PrivFsData->Root);
Error_Find_Root_Dir:
Error_Read_Udf_Volume:
Error_Invalid_Params:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Opens a new file relative to the source file's location.
@param This The protocol instance pointer.
@param NewHandle Returns File Handle for FileName.
@param FileName Null terminated string. "\", ".", and ".." are supported.
@param OpenMode Open mode for file.
@param Attributes Only used for EFI_FILE_MODE_CREATE.
@retval EFI_SUCCESS The device was opened.
@retval EFI_NOT_FOUND The specified file could not be found on the
device.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_MEDIA_CHANGED The media has changed.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_ACCESS_DENIED The service denied access to the file.
@retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of
resources.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
UdfOpen (
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
EFI_TPL OldTpl;
EFI_STATUS Status;
PRIVATE_UDF_FILE_DATA *PrivFileData;
PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
CHAR16 FilePath[UDF_PATH_LENGTH];
UDF_FILE_INFO File;
PRIVATE_UDF_FILE_DATA *NewPrivFileData;
CHAR16 *TempFileName;
ZeroMem (FilePath, sizeof FilePath);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (This == NULL || NewHandle == NULL || FileName == NULL) {
Status = EFI_INVALID_PARAMETER;
goto Error_Invalid_Params;
}
if (OpenMode != EFI_FILE_MODE_READ) {
Status = EFI_WRITE_PROTECTED;
goto Error_Invalid_Params;
}
PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);
PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);
//
// Build full path
//
if (*FileName == L'\\') {
StrCpyS (FilePath, UDF_PATH_LENGTH, FileName);
} else {
StrCpyS (FilePath, UDF_PATH_LENGTH, PrivFileData->AbsoluteFileName);
StrCatS (FilePath, UDF_PATH_LENGTH, L"\\");
StrCatS (FilePath, UDF_PATH_LENGTH, FileName);
}
MangleFileName (FilePath);
if (FilePath[0] == L'\0') {
Status = EFI_NOT_FOUND;
goto Error_Bad_FileName;
}
Status = FindFile (
PrivFsData->BlockIo,
PrivFsData->DiskIo,
&PrivFsData->Volume,
FilePath,
_ROOT_FILE (PrivFileData),
_PARENT_FILE (PrivFileData),
&_PARENT_FILE(PrivFileData)->FileIdentifierDesc->Icb,
&File
);
if (EFI_ERROR (Status)) {
goto Error_Find_File;
}
NewPrivFileData =
(PRIVATE_UDF_FILE_DATA *)AllocateZeroPool (sizeof (PRIVATE_UDF_FILE_DATA));
if (NewPrivFileData == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Error_Alloc_New_Priv_File_Data;
}
CopyMem ((VOID *)NewPrivFileData, (VOID *)PrivFileData,
sizeof (PRIVATE_UDF_FILE_DATA));
CopyMem ((VOID *)&NewPrivFileData->File, &File, sizeof (UDF_FILE_INFO));
NewPrivFileData->IsRootDirectory = FALSE;
StrCpyS (NewPrivFileData->AbsoluteFileName, UDF_PATH_LENGTH, FilePath);
FileName = NewPrivFileData->AbsoluteFileName;
while ((TempFileName = StrStr (FileName, L"\\")) != NULL) {
FileName = TempFileName + 1;
}
StrCpyS (NewPrivFileData->FileName, UDF_FILENAME_LENGTH, FileName);
Status = GetFileSize (
PrivFsData->BlockIo,
PrivFsData->DiskIo,
&PrivFsData->Volume,
&NewPrivFileData->File,
&NewPrivFileData->FileSize
);
if (EFI_ERROR (Status)) {
DEBUG ((
DEBUG_ERROR,
"%a: GetFileSize() fails with status - %r.\n",
__FUNCTION__, Status
));
goto Error_Get_File_Size;
}
NewPrivFileData->FilePosition = 0;
ZeroMem ((VOID *)&NewPrivFileData->ReadDirInfo,
sizeof (UDF_READ_DIRECTORY_INFO));
*NewHandle = &NewPrivFileData->FileIo;
PrivFsData->OpenFiles++;
gBS->RestoreTPL (OldTpl);
return Status;
Error_Get_File_Size:
FreePool ((VOID *)NewPrivFileData);
Error_Alloc_New_Priv_File_Data:
CleanupFileInformation (&File);
Error_Find_File:
Error_Bad_FileName:
Error_Invalid_Params:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Read data from the file.
@param This Protocol instance pointer.
@param BufferSize On input size of buffer, on output amount of data in
buffer.
@param Buffer The buffer in which data is read.
@retval EFI_SUCCESS Data was read.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_BUFFER_TO_SMALL BufferSize is too small. BufferSize contains
required size.
**/
EFI_STATUS
EFIAPI
UdfRead (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_TPL OldTpl;
EFI_STATUS Status;
PRIVATE_UDF_FILE_DATA *PrivFileData;
PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
UDF_VOLUME_INFO *Volume;
UDF_FILE_INFO *Parent;
UDF_READ_DIRECTORY_INFO *ReadDirInfo;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
EFI_DISK_IO_PROTOCOL *DiskIo;
UDF_FILE_INFO FoundFile;
UDF_FILE_IDENTIFIER_DESCRIPTOR *NewFileIdentifierDesc;
VOID *NewFileEntryData;
CHAR16 FileName[UDF_FILENAME_LENGTH];
UINT64 FileSize;
UINT64 BufferSizeUint64;
ZeroMem (FileName, sizeof FileName);
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
if (This == NULL || BufferSize == NULL || (*BufferSize != 0 &&
Buffer == NULL)) {
Status = EFI_INVALID_PARAMETER;
goto Error_Invalid_Params;
}
PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);
PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);
BlockIo = PrivFsData->BlockIo;
DiskIo = PrivFsData->DiskIo;
Volume = &PrivFsData->Volume;
ReadDirInfo = &PrivFileData->ReadDirInfo;
NewFileIdentifierDesc = NULL;
NewFileEntryData = NULL;
Parent = _PARENT_FILE (PrivFileData);
Status = EFI_VOLUME_CORRUPTED;
if (IS_FID_NORMAL_FILE (Parent->FileIdentifierDesc)) {
if (PrivFileData->FilePosition > PrivFileData->FileSize) {
//
// File's position is beyond the EOF
//
Status = EFI_DEVICE_ERROR;
goto Error_File_Beyond_The_Eof;
}
if (PrivFileData->FilePosition == PrivFileData->FileSize) {
*BufferSize = 0;
Status = EFI_SUCCESS;
goto Done;
}
BufferSizeUint64 = *BufferSize;
Status = ReadFileData (
BlockIo,
DiskIo,
Volume,
Parent,
PrivFileData->FileSize,
&PrivFileData->FilePosition,
Buffer,
&BufferSizeUint64
);
ASSERT (BufferSizeUint64 <= MAX_UINTN);
*BufferSize = (UINTN)BufferSizeUint64;
} else if (IS_FID_DIRECTORY_FILE (Parent->FileIdentifierDesc)) {
if (ReadDirInfo->FidOffset == 0 && PrivFileData->FilePosition > 0) {
Status = EFI_DEVICE_ERROR;
*BufferSize = 0;
goto Done;
}
for (;;) {
Status = ReadDirectoryEntry (
BlockIo,
DiskIo,
Volume,
&Parent->FileIdentifierDesc->Icb,
Parent->FileEntry,
ReadDirInfo,
&NewFileIdentifierDesc
);
if (EFI_ERROR (Status)) {
if (Status == EFI_DEVICE_ERROR) {
FreePool (ReadDirInfo->DirectoryData);
ZeroMem ((VOID *)ReadDirInfo, sizeof (UDF_READ_DIRECTORY_INFO));
*BufferSize = 0;
Status = EFI_SUCCESS;
}
goto Done;
}
//
// After calling function ReadDirectoryEntry(), if 'NewFileIdentifierDesc'
// is NULL, then the 'Status' must be EFI_OUT_OF_RESOURCES. Hence, if the
// code reaches here, 'NewFileIdentifierDesc' must be not NULL.
//
// The ASSERT here is for addressing a false positive NULL pointer
// dereference issue raised from static analysis.
//
ASSERT (NewFileIdentifierDesc != NULL);
if (!IS_FID_PARENT_FILE (NewFileIdentifierDesc)) {
break;
}
FreePool ((VOID *)NewFileIdentifierDesc);
}
Status = FindFileEntry (
BlockIo,
DiskIo,
Volume,
&NewFileIdentifierDesc->Icb,
&NewFileEntryData
);
if (EFI_ERROR (Status)) {
goto Error_Find_Fe;
}
ASSERT (NewFileEntryData != NULL);
if (FE_ICB_FILE_TYPE (NewFileEntryData) == UdfFileEntrySymlink) {
Status = ResolveSymlink (
BlockIo,
DiskIo,
Volume,
Parent,
NewFileEntryData,
&FoundFile
);
if (EFI_ERROR (Status)) {
goto Error_Resolve_Symlink;
}
FreePool ((VOID *)NewFileEntryData);
NewFileEntryData = FoundFile.FileEntry;
Status = GetFileNameFromFid (NewFileIdentifierDesc, ARRAY_SIZE (FileName), FileName);
if (EFI_ERROR (Status)) {
FreePool ((VOID *)FoundFile.FileIdentifierDesc);
goto Error_Get_FileName;
}
FreePool ((VOID *)NewFileIdentifierDesc);
NewFileIdentifierDesc = FoundFile.FileIdentifierDesc;
} else {
FoundFile.FileIdentifierDesc = NewFileIdentifierDesc;
FoundFile.FileEntry = NewFileEntryData;
Status = GetFileNameFromFid (FoundFile.FileIdentifierDesc, ARRAY_SIZE (FileName), FileName);
if (EFI_ERROR (Status)) {
goto Error_Get_FileName;
}
}
Status = GetFileSize (
BlockIo,
DiskIo,
Volume,
&FoundFile,
&FileSize
);
if (EFI_ERROR (Status)) {
goto Error_Get_File_Size;
}
Status = SetFileInfo (
&FoundFile,
FileSize,
FileName,
BufferSize,
Buffer
);
if (EFI_ERROR (Status)) {
goto Error_Set_File_Info;
}
PrivFileData->FilePosition++;
Status = EFI_SUCCESS;
} else if (IS_FID_DELETED_FILE (Parent->FileIdentifierDesc)) {
//
// Code should never reach here.
//
ASSERT (FALSE);
Status = EFI_DEVICE_ERROR;
}
Error_Set_File_Info:
Error_Get_File_Size:
Error_Get_FileName:
Error_Resolve_Symlink:
if (NewFileEntryData != NULL) {
FreePool (NewFileEntryData);
}
Error_Find_Fe:
if (NewFileIdentifierDesc != NULL) {
FreePool ((VOID *)NewFileIdentifierDesc);
}
Done:
Error_File_Beyond_The_Eof:
Error_Invalid_Params:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Close the file handle.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The file was closed.
**/
EFI_STATUS
EFIAPI
UdfClose (
IN EFI_FILE_PROTOCOL *This
)
{
EFI_TPL OldTpl;
EFI_STATUS Status;
PRIVATE_UDF_FILE_DATA *PrivFileData;
OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
Status = EFI_SUCCESS;
if (This == NULL) {
Status = EFI_INVALID_PARAMETER;
goto Exit;
}
PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);
if (!PrivFileData->IsRootDirectory) {
CleanupFileInformation (&PrivFileData->File);
if (PrivFileData->ReadDirInfo.DirectoryData != NULL) {
FreePool (PrivFileData->ReadDirInfo.DirectoryData);
}
}
FreePool ((VOID *)PrivFileData);
Exit:
gBS->RestoreTPL (OldTpl);
return Status;
}
/**
Close and delete the file handle.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The file was closed and deleted.
@retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not
deleted.
**/
EFI_STATUS
EFIAPI
UdfDelete (
IN EFI_FILE_PROTOCOL *This
)
{
PRIVATE_UDF_FILE_DATA *PrivFileData;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);
(VOID)PrivFileData->FileIo.Close(This);
return EFI_WARN_DELETE_FAILURE;
}
/**
Write data to a file.
@param This Protocol instance pointer.
@param BufferSize On input size of buffer, on output amount of data in
buffer.
@param Buffer The buffer in which data to write.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Writes to Open directory are not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_DEVICE_ERROR An attempt was made to write to a deleted file.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
UdfWrite (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
{
return EFI_UNSUPPORTED;
}
/**
Get file's current position.
@param This Protocol instance pointer.
@param Position Byte position from the start of the file.
@retval EFI_SUCCESS Position was updated.
@retval EFI_UNSUPPORTED Seek request for directories is not valid.
**/
EFI_STATUS
EFIAPI
UdfGetPosition (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
)
{
PRIVATE_UDF_FILE_DATA *PrivFileData;
if (This == NULL || Position == NULL) {
return EFI_INVALID_PARAMETER;
}
PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);
//
// As per UEFI spec, if the file handle is a directory, then the current file
// position has no meaning and the operation is not supported.
//
if (IS_FID_DIRECTORY_FILE (PrivFileData->File.FileIdentifierDesc)) {
return EFI_UNSUPPORTED;
}
//
// The file is not a directory. So, return its position.
//
*Position = PrivFileData->FilePosition;
return EFI_SUCCESS;
}
/**
Set file's current position.
@param This Protocol instance pointer.
@param Position Byte position from the start of the file.
@retval EFI_SUCCESS Position was updated.
@retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open.
**/
EFI_STATUS
EFIAPI
UdfSetPosition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
)
{
EFI_STATUS Status;
PRIVATE_UDF_FILE_DATA *PrivFileData;
UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc;
if (This == NULL) {
return EFI_INVALID_PARAMETER;
}
Status = EFI_UNSUPPORTED;
PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);
FileIdentifierDesc = _FILE (PrivFileData)->FileIdentifierDesc;
ASSERT (FileIdentifierDesc != NULL);
if (IS_FID_DIRECTORY_FILE (FileIdentifierDesc)) {
//
// If the file handle is a directory, the _only_ position that may be set is
// zero. This has no effect of starting the read proccess of the directory
// entries over.
//
if (Position == 0) {
PrivFileData->FilePosition = Position;
PrivFileData->ReadDirInfo.FidOffset = 0;
Status = EFI_SUCCESS;
}
} else if (IS_FID_NORMAL_FILE (FileIdentifierDesc)) {
//
// Seeking to position 0xFFFFFFFFFFFFFFFF causes the current position to be
// set to the EOF.
//
if (Position == 0xFFFFFFFFFFFFFFFF) {
PrivFileData->FilePosition = PrivFileData->FileSize;
} else {
PrivFileData->FilePosition = Position;
}
Status = EFI_SUCCESS;
}
return Status;
}
/**
Get information about a file.
@param This Protocol instance pointer.
@param InformationType Type of information to return in Buffer.
@param BufferSize On input size of buffer, on output amount of data in
buffer.
@param Buffer The buffer to return data.
@retval EFI_SUCCESS Data was returned.
@retval EFI_UNSUPPORTED InformationType is not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_BUFFER_TOO_SMALL Buffer was too small; required size returned in
BufferSize.
**/
EFI_STATUS
EFIAPI
UdfGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
PRIVATE_UDF_FILE_DATA *PrivFileData;
PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
EFI_FILE_SYSTEM_INFO *FileSystemInfo;
UINTN FileSystemInfoLength;
UINT64 VolumeSize;
UINT64 FreeSpaceSize;
EFI_FILE_SYSTEM_VOLUME_LABEL *FileSystemVolumeLabel;
UINTN FileSystemVolumeLabelLength;
CHAR16 VolumeLabel[64];
if (This == NULL || InformationType == NULL || BufferSize == NULL ||
(*BufferSize != 0 && Buffer == NULL)) {
return EFI_INVALID_PARAMETER;
}
PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);
PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);
Status = EFI_UNSUPPORTED;
if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {
Status = SetFileInfo (
_FILE (PrivFileData),
PrivFileData->FileSize,
PrivFileData->FileName,
BufferSize,
Buffer
);
} else if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
Status = GetVolumeLabel (&PrivFsData->Volume, ARRAY_SIZE (VolumeLabel), VolumeLabel);
if (EFI_ERROR (Status)) {
return Status;
}
FileSystemInfoLength = StrSize (VolumeLabel) +
sizeof (EFI_FILE_SYSTEM_INFO);
if (*BufferSize < FileSystemInfoLength) {
*BufferSize = FileSystemInfoLength;
return EFI_BUFFER_TOO_SMALL;
}
FileSystemInfo = (EFI_FILE_SYSTEM_INFO *)Buffer;
StrCpyS (
FileSystemInfo->VolumeLabel,
(*BufferSize - SIZE_OF_EFI_FILE_SYSTEM_INFO) / sizeof (CHAR16),
VolumeLabel
);
Status = GetVolumeSize (
PrivFsData->BlockIo,
PrivFsData->DiskIo,
&PrivFsData->Volume,
&VolumeSize,
&FreeSpaceSize
);
if (EFI_ERROR (Status)) {
return Status;
}
FileSystemInfo->Size = FileSystemInfoLength;
FileSystemInfo->ReadOnly = TRUE;
FileSystemInfo->BlockSize =
PrivFsData->Volume.LogicalVolDesc.LogicalBlockSize;
FileSystemInfo->VolumeSize = VolumeSize;
FileSystemInfo->FreeSpace = FreeSpaceSize;
*BufferSize = FileSystemInfoLength;
Status = EFI_SUCCESS;
} else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
Status = GetVolumeLabel (&PrivFsData->Volume, ARRAY_SIZE (VolumeLabel), VolumeLabel);
if (EFI_ERROR (Status)) {
return Status;
}
FileSystemVolumeLabelLength = StrSize (VolumeLabel) +
sizeof (EFI_FILE_SYSTEM_VOLUME_LABEL);
if (*BufferSize < FileSystemVolumeLabelLength) {
*BufferSize = FileSystemVolumeLabelLength;
return EFI_BUFFER_TOO_SMALL;
}
FileSystemVolumeLabel = (EFI_FILE_SYSTEM_VOLUME_LABEL *)Buffer;
StrCpyS (
FileSystemVolumeLabel->VolumeLabel,
(*BufferSize - SIZE_OF_EFI_FILE_SYSTEM_VOLUME_LABEL) / sizeof (CHAR16),
VolumeLabel
);
Status = EFI_SUCCESS;
}
return Status;
}
/**
Set information about a file.
@param This Protocol instance pointer.
@param InformationType Type of information in Buffer.
@param BufferSize Size of buffer.
@param Buffer The data to write.
@retval EFI_SUCCESS Data was set.
@retval EFI_UNSUPPORTED InformationType is not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
**/
EFI_STATUS
EFIAPI
UdfSetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
return EFI_WRITE_PROTECTED;
}
/**
Flush data back for the file handle.
@param This Protocol instance pointer.
@retval EFI_SUCCESS Data was flushed.
@retval EFI_UNSUPPORTED Writes to Open directory are not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
UdfFlush (
IN EFI_FILE_PROTOCOL *This
)
{
return EFI_WRITE_PROTECTED;
}
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