This patch introduces UDF file system support in EDK2. All block devices
that support BlockIo and DiskIo protocols and contain a valid UDF file
system - as specified by OSTA Universal Disk Format (revisions 1.02
through 2.60) - will be installed EFI_SIMPLE_FILE_SYSTEM_PROTOCOL to
provide access to underlying file system.
File system operations on regular, directory and symlink files are
supported.
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Paulo Alcantara <pcacjr@zytor.com>
---
MdeModulePkg/Universal/Disk/UdfDxe/ComponentName.c | 185 ++
MdeModulePkg/Universal/Disk/UdfDxe/File.c | 903 ++++++++
MdeModulePkg/Universal/Disk/UdfDxe/FileName.c | 195 ++
.../Universal/Disk/UdfDxe/FileSystemOperations.c | 2447 ++++++++++++++++++++
MdeModulePkg/Universal/Disk/UdfDxe/Udf.c | 344 +++
MdeModulePkg/Universal/Disk/UdfDxe/Udf.h | 1244 ++++++++++
MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf | 66 +
7 files changed, 5384 insertions(+)
create mode 100644 MdeModulePkg/Universal/Disk/UdfDxe/ComponentName.c
create mode 100644 MdeModulePkg/Universal/Disk/UdfDxe/File.c
create mode 100644 MdeModulePkg/Universal/Disk/UdfDxe/FileName.c
create mode 100644 MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c
create mode 100644 MdeModulePkg/Universal/Disk/UdfDxe/Udf.c
create mode 100644 MdeModulePkg/Universal/Disk/UdfDxe/Udf.h
create mode 100644 MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/ComponentName.c b/MdeModulePkg/Universal/Disk/UdfDxe/ComponentName.c
new file mode 100644
index 0000000000..c58bc940b9
--- /dev/null
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/ComponentName.c
@@ -0,0 +1,185 @@
+/** @file
+ UEFI Component Name protocol for UDF/ECMA-167 file system driver.
+
+ Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
+
+ 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 Component Name Protocol
+//
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME_PROTOCOL gUdfComponentName = {
+ UdfComponentNameGetDriverName,
+ UdfComponentNameGetControllerName,
+ "eng"
+};
+
+//
+// EFI Component Name 2 Protocol
+//
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME2_PROTOCOL gUdfComponentName2 = {
+ (EFI_COMPONENT_NAME2_GET_DRIVER_NAME) UdfComponentNameGetDriverName,
+ (EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME) UdfComponentNameGetControllerName,
+ "en"
+};
+
+//
+// Driver name table for Udf module.
+// It is shared by the implementation of ComponentName & ComponentName2 Protocol.
+//
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mUdfDriverNameTable[] = {
+ {
+ "eng;en",
+ L"UDF File System Driver"
+ },
+ {
+ NULL,
+ NULL
+ }
+};
+
+/**
+ Retrieves a Unicode string that is the user readable name of the driver.
+
+ This function retrieves the user readable name of a driver in the form of a
+ Unicode string. If the driver specified by This has a user readable name in
+ the language specified by Language, then a pointer to the driver name is
+ returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
+ by This does not support the language specified by Language,
+ then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param Language[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver name that the caller is
+ requesting, and it must match one of the
+ languages specified in SupportedLanguages. The
+ number of languages supported by a driver is up
+ to the driver writer. Language is specified
+ in RFC 4646 or ISO 639-2 language code format.
+
+ @param DriverName[out] A pointer to the Unicode string to return.
+ This Unicode string is the name of the
+ driver specified by This in the language
+ specified by Language.
+
+ @retval EFI_SUCCESS The Unicode string for the Driver specified by
+ This and the language specified by Language was
+ returned in DriverName.
+
+ @retval EFI_INVALID_PARAMETER Language is NULL.
+
+ @retval EFI_INVALID_PARAMETER DriverName is NULL.
+
+ @retval EFI_UNSUPPORTED The driver specified by This does not support
+ the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+UdfComponentNameGetDriverName (
+ IN EFI_COMPONENT_NAME_PROTOCOL *This,
+ IN CHAR8 *Language,
+ OUT CHAR16 **DriverName
+ )
+{
+ return LookupUnicodeString2 (
+ Language,
+ This->SupportedLanguages,
+ mUdfDriverNameTable,
+ DriverName,
+ (BOOLEAN)(This == &gUdfComponentName)
+ );
+}
+
+/**
+ Retrieves a Unicode string that is the user readable name of the controller
+ that is being managed by a driver.
+
+ This function retrieves the user readable name of the controller specified by
+ ControllerHandle and ChildHandle in the form of a Unicode string. If the
+ driver specified by This has a user readable name in the language specified by
+ Language, then a pointer to the controller name is returned in ControllerName,
+ and EFI_SUCCESS is returned. If the driver specified by This is not currently
+ managing the controller specified by ControllerHandle and ChildHandle,
+ then EFI_UNSUPPORTED is returned. If the driver specified by This does not
+ support the language specified by Language, then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param ControllerHandle[in] The handle of a controller that the driver
+ specified by This is managing. This handle
+ specifies the controller whose name is to be
+ returned.
+
+ @param ChildHandle[in] The handle of the child controller to retrieve
+ the name of. This is an optional parameter that
+ may be NULL. It will be NULL for device
+ drivers. It will also be NULL for a bus drivers
+ that wish to retrieve the name of the bus
+ controller. It will not be NULL for a bus
+ driver that wishes to retrieve the name of a
+ child controller.
+
+ @param Language[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver name that the caller is
+ requesting, and it must match one of the
+ languages specified in SupportedLanguages. The
+ number of languages supported by a driver is up
+ to the driver writer. Language is specified in
+ RFC 4646 or ISO 639-2 language code format.
+
+ @param ControllerName[out] A pointer to the Unicode string to return.
+ This Unicode string is the name of the
+ controller specified by ControllerHandle and
+ ChildHandle in the language specified by
+ Language from the point of view of the driver
+ specified by This.
+
+ @retval EFI_SUCCESS The Unicode string for the user readable name in
+ the language specified by Language for the
+ driver specified by This was returned in
+ DriverName.
+
+ @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
+
+ @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
+ EFI_HANDLE.
+
+ @retval EFI_INVALID_PARAMETER Language is NULL.
+
+ @retval EFI_INVALID_PARAMETER ControllerName is NULL.
+
+ @retval EFI_UNSUPPORTED The driver specified by This is not currently
+ managing the controller specified by
+ ControllerHandle and ChildHandle.
+
+ @retval EFI_UNSUPPORTED The driver specified by This does not support
+ the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+UdfComponentNameGetControllerName (
+ IN EFI_COMPONENT_NAME_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_HANDLE ChildHandle OPTIONAL,
+ IN CHAR8 *Language,
+ OUT CHAR16 **ControllerName
+ )
+{
+ return EFI_UNSUPPORTED;
+}
diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/File.c b/MdeModulePkg/Universal/Disk/UdfDxe/File.c
new file mode 100644
index 0000000000..8ad14fe594
--- /dev/null
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/File.c
@@ -0,0 +1,903 @@
+/** @file
+ Handle operations in files and directories from UDF/ECMA-167 file systems.
+
+ Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
+
+ 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:
+ CleanupVolumeInformation (&PrivFsData->Volume);
+
+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] = { 0 };
+ UDF_FILE_INFO File;
+ PRIVATE_UDF_FILE_DATA *NewPrivFileData;
+ CHAR16 *TempFileName;
+
+ 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_PATH_LENGTH, FileName);
+
+ Status = GetFileSize (
+ PrivFsData->BlockIo,
+ PrivFsData->DiskIo,
+ &PrivFsData->Volume,
+ &NewPrivFileData->File,
+ &NewPrivFileData->FileSize
+ );
+ ASSERT_EFI_ERROR (Status);
+ if (EFI_ERROR (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] = { 0 };
+ UINT64 FileSize;
+
+ 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;
+ }
+
+ Status = ReadFileData (
+ BlockIo,
+ DiskIo,
+ Volume,
+ Parent,
+ PrivFileData->FileSize,
+ &PrivFileData->FilePosition,
+ Buffer,
+ BufferSize
+ );
+ } 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;
+ }
+
+ 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;
+ }
+
+ if (IS_FE_SYMLINK (NewFileEntryData)) {
+ 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, 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, 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)) {
+ 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;
+ PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
+
+ 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);
+
+ PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);
+
+ if (!PrivFileData->IsRootDirectory) {
+ CleanupFileInformation (&PrivFileData->File);
+
+ if (PrivFileData->ReadDirInfo.DirectoryData != NULL) {
+ FreePool (PrivFileData->ReadDirInfo.DirectoryData);
+ }
+ }
+
+ if (--PrivFsData->OpenFiles == 0) {
+ CleanupVolumeInformation (&PrivFsData->Volume);
+ }
+
+ 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 = PrivFileData->File.FileIdentifierDesc;
+ 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 - 1;
+ } 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;
+ CHAR16 *String;
+ UDF_FILE_SET_DESCRIPTOR *FileSetDesc;
+ UINTN Index;
+ UINT8 *OstaCompressed;
+ UINT8 CompressionId;
+ UINT64 VolumeSize;
+ UINT64 FreeSpaceSize;
+ 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)) {
+ String = VolumeLabel;
+
+ FileSetDesc = PrivFsData->Volume.FileSetDescs[0];
+
+ OstaCompressed = &FileSetDesc->LogicalVolumeIdentifier[0];
+
+ CompressionId = OstaCompressed[0];
+ if (!IS_VALID_COMPRESSION_ID (CompressionId)) {
+ return EFI_VOLUME_CORRUPTED;
+ }
+
+ for (Index = 1; Index < 128; Index++) {
+ if (CompressionId == 16) {
+ *String = *(UINT8 *)(OstaCompressed + Index) << 8;
+ Index++;
+ } else {
+ *String = 0;
+ }
+
+ if (Index < 128) {
+ *String |= *(UINT8 *)(OstaCompressed + Index);
+ }
+
+ //
+ // Unlike FID Identifiers, Logical Volume Identifier is stored in a
+ // NULL-terminated OSTA compressed format, so we must check for the NULL
+ // character.
+ //
+ if (*String == L'\0') {
+ break;
+ }
+
+ String++;
+ }
+
+ *String = L'\0';
+
+ 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, ARRAY_SIZE (VolumeLabel),
+ 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 =
+ LV_BLOCK_SIZE (&PrivFsData->Volume, UDF_DEFAULT_LV_NUM);
+ FileSystemInfo->VolumeSize = VolumeSize;
+ FileSystemInfo->FreeSpace = FreeSpaceSize;
+
+ *BufferSize = FileSystemInfoLength;
+ Status = EFI_SUCCESS;
+ }
+
+ return Status;
+}
+
+/**
+ Set information about a file.
+
+ @param File 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;
+}
diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/FileName.c b/MdeModulePkg/Universal/Disk/UdfDxe/FileName.c
new file mode 100644
index 0000000000..f73793320d
--- /dev/null
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/FileName.c
@@ -0,0 +1,195 @@
+/** @file
+ Helper functions for mangling file names in UDF/ECMA-167 file systems.
+
+ Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
+
+ 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"
+
+CHAR16 *
+TrimString (
+ IN CHAR16 *String
+ )
+{
+ CHAR16 *TempString;
+
+ for ( ; *String != L'\0' && *String == L' '; String++) {
+ ;
+ }
+
+ TempString = String + StrLen (String) - 1;
+ while ((TempString >= String) && (*TempString == L' ')) {
+ TempString--;
+ }
+
+ *(TempString + 1) = L'\0';
+
+ return String;
+}
+
+VOID
+ReplaceLeft (
+ IN CHAR16 *Destination,
+ IN CONST CHAR16 *Source
+ )
+{
+ CONST CHAR16 *EndString;
+
+ EndString = Source + StrLen (Source);
+ while (Source <= EndString) {
+ *Destination++ = *Source++;
+ }
+}
+
+CHAR16 *
+ExcludeTrailingBackslashes (
+ IN CHAR16 *String
+ )
+{
+ CHAR16 *TempString;
+
+ switch (*(String + 1)) {
+ case L'\\':
+ break;
+ case L'\0':
+ default:
+ String++;
+ goto Exit;
+ }
+
+ TempString = String;
+ while (*TempString != L'\0' && *TempString == L'\\') {
+ TempString++;
+ }
+
+ if (TempString - 1 > String) {
+ ReplaceLeft (String + 1, TempString);
+ }
+
+ String++;
+
+Exit:
+ return String;
+}
+
+/**
+ Mangle a filename by cutting off trailing whitespaces, "\\", "." and "..".
+
+ @param[in] FileName Filename.
+
+ @retval @p FileName Filename mangled.
+
+**/
+CHAR16 *
+MangleFileName (
+ IN CHAR16 *FileName
+ )
+{
+ CHAR16 *FileNameSavedPointer;
+ CHAR16 *TempFileName;
+ UINTN BackslashesNo;
+
+ if (FileName == NULL || *FileName == L'\0') {
+ FileName = NULL;
+ goto Exit;
+ }
+
+ FileName = TrimString (FileName);
+ if (*FileName == L'\0') {
+ goto Exit;
+ }
+
+ if ((StrLen (FileName) > 1) && (FileName[StrLen (FileName) - 1] == L'\\')) {
+ FileName[StrLen (FileName) - 1] = L'\0';
+ }
+
+ FileNameSavedPointer = FileName;
+
+ if (FileName[0] == L'.') {
+ if (FileName[1] == L'.') {
+ if (FileName[2] == L'\0') {
+ goto Exit;
+ } else {
+ FileName += 2;
+ }
+ } else if (FileName[1] == L'\0') {
+ goto Exit;
+ }
+ }
+
+ while (*FileName != L'\0') {
+ if (*FileName == L'\\') {
+ FileName = ExcludeTrailingBackslashes (FileName);
+ } else if (*FileName == L'.') {
+ switch (*(FileName + 1)) {
+ case L'\0':
+ *FileName = L'\0';
+ break;
+ case L'\\':
+ TempFileName = FileName + 1;
+ TempFileName = ExcludeTrailingBackslashes (TempFileName);
+ ReplaceLeft (FileName, TempFileName);
+ break;
+ case '.':
+ if ((*(FileName - 1) != L'\\') && ((*(FileName + 2) != L'\\') ||
+ (*(FileName + 2) != L'\0'))) {
+ FileName++;
+ continue;
+ }
+
+ BackslashesNo = 0;
+ TempFileName = FileName - 1;
+ while (TempFileName >= FileNameSavedPointer) {
+ if (*TempFileName == L'\\') {
+ if (++BackslashesNo == 2) {
+ break;
+ }
+ }
+
+ TempFileName--;
+ }
+
+ TempFileName++;
+
+ if ((*TempFileName == L'.') && (*(TempFileName + 1) == L'.')) {
+ FileName += 2;
+ } else {
+ if (*(FileName + 2) != L'\0') {
+ ReplaceLeft (TempFileName, FileName + 3);
+ if (*(TempFileName - 1) == L'\\') {
+ FileName = TempFileName;
+ ExcludeTrailingBackslashes (TempFileName - 1);
+ TempFileName = FileName;
+ }
+ } else {
+ *TempFileName = L'\0';
+ }
+
+ FileName = TempFileName;
+ }
+
+ break;
+ default:
+ FileName++;
+ }
+ } else {
+ FileName++;
+ }
+ }
+
+ FileName = FileNameSavedPointer;
+ if ((StrLen (FileName) > 1) && (FileName [StrLen (FileName) - 1] == L'\\')) {
+ FileName [StrLen (FileName) - 1] = L'\0';
+ }
+
+Exit:
+ return FileName;
+}
diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c b/MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c
new file mode 100644
index 0000000000..7d7f722188
--- /dev/null
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/FileSystemOperations.c
@@ -0,0 +1,2447 @@
+/** @file
+ Handle on-disk format and volume structures in UDF/ECMA-167 file systems.
+
+ Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
+
+ 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_STATUS
+FindAnchorVolumeDescriptorPointer (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ OUT UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER *AnchorPoint
+ )
+{
+ EFI_STATUS Status;
+ UINT32 BlockSize = BlockIo->Media->BlockSize;
+ EFI_LBA EndLBA = BlockIo->Media->LastBlock;
+ EFI_LBA DescriptorLBAs[] = { 256, EndLBA - 256, EndLBA, 512 };
+ UINTN Index;
+
+ for (Index = 0; Index < ARRAY_SIZE (DescriptorLBAs); Index++) {
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ MultU64x32 (DescriptorLBAs[Index], BlockSize),
+ sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),
+ (VOID *)AnchorPoint
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ //
+ // Check if read LBA has a valid AVDP descriptor.
+ //
+ if (IS_AVDP (AnchorPoint)) {
+ return EFI_SUCCESS;
+ }
+ }
+ //
+ // No AVDP found.
+ //
+ return EFI_VOLUME_CORRUPTED;
+}
+
+EFI_STATUS
+StartMainVolumeDescriptorSequence (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER *AnchorPoint,
+ OUT UDF_VOLUME_INFO *Volume
+ )
+{
+ EFI_STATUS Status;
+ UINT32 BlockSize;
+ UDF_EXTENT_AD *ExtentAd;
+ UINT64 StartingLsn;
+ UINT64 EndingLsn;
+ VOID *Buffer;
+ UDF_LOGICAL_VOLUME_DESCRIPTOR *LogicalVolDesc;
+ UDF_PARTITION_DESCRIPTOR *PartitionDesc;
+ UINTN Index;
+ UINT32 LogicalBlockSize;
+
+ //
+ // We've already found an ADVP on the volume. It contains the extent
+ // (MainVolumeDescriptorSequenceExtent) where the Main Volume Descriptor
+ // Sequence starts. Therefore, we'll look for Logical Volume Descriptors and
+ // Partitions Descriptors and save them in memory, accordingly.
+ //
+ // Note also that each descriptor will be aligned on a block size (BlockSize)
+ // boundary, so we need to read one block at a time.
+ //
+ BlockSize = BlockIo->Media->BlockSize;
+ ExtentAd = &AnchorPoint->MainVolumeDescriptorSequenceExtent;
+ StartingLsn = (UINT64)ExtentAd->ExtentLocation;
+ EndingLsn = StartingLsn + DivU64x32 (
+ (UINT64)ExtentAd->ExtentLength,
+ BlockSize
+ );
+
+ Volume->LogicalVolDescs =
+ (UDF_LOGICAL_VOLUME_DESCRIPTOR **)AllocateZeroPool (ExtentAd->ExtentLength);
+ if (Volume->LogicalVolDescs == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Volume->PartitionDescs =
+ (UDF_PARTITION_DESCRIPTOR **)AllocateZeroPool (ExtentAd->ExtentLength);
+ if (Volume->PartitionDescs == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error_Alloc_Pds;
+ }
+
+ Buffer = AllocateZeroPool (BlockSize);
+ if (Buffer == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error_Alloc_Buf;
+ }
+
+ Volume->LogicalVolDescsNo = 0;
+ Volume->PartitionDescsNo = 0;
+
+ while (StartingLsn <= EndingLsn) {
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ MultU64x32 (StartingLsn, BlockSize),
+ BlockSize,
+ Buffer
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Read_Disk_Blk;
+ }
+
+ if (IS_TD (Buffer)) {
+ //
+ // Found a Terminating Descriptor. Stop the sequence then.
+ //
+ break;
+ }
+
+ if (IS_LVD (Buffer)) {
+ //
+ // Found a Logical Volume Descriptor.
+ //
+ LogicalVolDesc =
+ (UDF_LOGICAL_VOLUME_DESCRIPTOR *)
+ AllocateZeroPool (sizeof (UDF_LOGICAL_VOLUME_DESCRIPTOR));
+ if (LogicalVolDesc == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error_Alloc_Lvd;
+ }
+
+ CopyMem ((VOID *)LogicalVolDesc, Buffer,
+ sizeof (UDF_LOGICAL_VOLUME_DESCRIPTOR));
+ Volume->LogicalVolDescs[Volume->LogicalVolDescsNo++] = LogicalVolDesc;
+ } else if (IS_PD (Buffer)) {
+ //
+ // Found a Partition Descriptor.
+ //
+ PartitionDesc =
+ (UDF_PARTITION_DESCRIPTOR *)
+ AllocateZeroPool (sizeof (UDF_PARTITION_DESCRIPTOR));
+ if (PartitionDesc == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error_Alloc_Pd;
+ }
+
+ CopyMem ((VOID *)PartitionDesc, Buffer,
+ sizeof (UDF_PARTITION_DESCRIPTOR));
+ Volume->PartitionDescs[Volume->PartitionDescsNo++] = PartitionDesc;
+ }
+
+ StartingLsn++;
+ }
+
+ //
+ // When an UDF volume (revision 2.00 or higher) contains a File Entry rather
+ // than an Extended File Entry (which is not recommended as per spec), we need
+ // to make sure the size of a FE will be _at least_ 2048
+ // (UDF_LOGICAL_SECTOR_SIZE) bytes long to keep backward compatibility.
+ //
+ LogicalBlockSize = LV_BLOCK_SIZE (Volume, UDF_DEFAULT_LV_NUM);
+ if (LogicalBlockSize >= UDF_LOGICAL_SECTOR_SIZE) {
+ Volume->FileEntrySize = LogicalBlockSize;
+ } else {
+ Volume->FileEntrySize = UDF_LOGICAL_SECTOR_SIZE;
+ }
+
+ FreePool (Buffer);
+
+ return EFI_SUCCESS;
+
+Error_Alloc_Pd:
+Error_Alloc_Lvd:
+ for (Index = 0; Index < Volume->PartitionDescsNo; Index++) {
+ FreePool ((VOID *)Volume->PartitionDescs[Index]);
+ }
+
+ for (Index = 0; Index < Volume->LogicalVolDescsNo; Index++) {
+ FreePool ((VOID *)Volume->LogicalVolDescs[Index]);
+ }
+
+Error_Read_Disk_Blk:
+ FreePool (Buffer);
+
+Error_Alloc_Buf:
+ FreePool ((VOID *)Volume->PartitionDescs);
+ Volume->PartitionDescs = NULL;
+
+Error_Alloc_Pds:
+ FreePool ((VOID *)Volume->LogicalVolDescs);
+ Volume->LogicalVolDescs = NULL;
+
+ return Status;
+}
+
+//
+// Return a Partition Descriptor given a Long Allocation Descriptor. This is
+// necessary to calculate the right extent (LongAd) offset which is added up
+// with partition's starting location.
+//
+UDF_PARTITION_DESCRIPTOR *
+GetPdFromLongAd (
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *LongAd
+ )
+{
+ UDF_LOGICAL_VOLUME_DESCRIPTOR *LogicalVolDesc;
+ UINTN Index;
+ UDF_PARTITION_DESCRIPTOR *PartitionDesc;
+ UINT16 PartitionNum;
+
+ LogicalVolDesc = Volume->LogicalVolDescs[UDF_DEFAULT_LV_NUM];
+
+ switch (LV_UDF_REVISION (LogicalVolDesc)) {
+ case 0x0102:
+ //
+ // As per UDF 1.02 specification:
+ //
+ // There shall be exactly one prevailing Logical Volume Descriptor recorded
+ // per Volume Set. The Partition Maps field shall contain only Type 1
+ // Partition Maps.
+ //
+ PartitionNum = *(UINT16 *)((UINTN)&LogicalVolDesc->PartitionMaps[4]);
+ break;
+ case 0x0150:
+ //
+ // Ensure Type 1 Partition map. Other types aren't supported in this
+ // implementation.
+ //
+ if (LogicalVolDesc->PartitionMaps[0] != 1 ||
+ LogicalVolDesc->PartitionMaps[1] != 6) {
+ return NULL;
+ }
+ PartitionNum = *(UINT16 *)((UINTN)&LogicalVolDesc->PartitionMaps[4]);
+ break;
+ case 0x0260:
+ //
+ // Fall through.
+ //
+ default:
+ PartitionNum = LongAd->ExtentLocation.PartitionReferenceNumber;
+ break;
+ }
+
+ for (Index = 0; Index < Volume->PartitionDescsNo; Index++) {
+ PartitionDesc = Volume->PartitionDescs[Index];
+ if (PartitionDesc->PartitionNumber == PartitionNum) {
+ return PartitionDesc;
+ }
+ }
+
+ return NULL;
+}
+
+//
+// Return logical sector number of a given Long Allocation Descriptor.
+//
+UINT64
+GetLongAdLsn (
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *LongAd
+ )
+{
+ UDF_PARTITION_DESCRIPTOR *PartitionDesc;
+
+ PartitionDesc = GetPdFromLongAd (Volume, LongAd);
+ ASSERT (PartitionDesc != NULL);
+
+ return (UINT64)PartitionDesc->PartitionStartingLocation +
+ LongAd->ExtentLocation.LogicalBlockNumber;
+}
+
+//
+// Return logical sector number of a given Short Allocation Descriptor.
+//
+UINT64
+GetShortAdLsn (
+ IN UDF_PARTITION_DESCRIPTOR *PartitionDesc,
+ IN UDF_SHORT_ALLOCATION_DESCRIPTOR *ShortAd
+ )
+{
+ return (UINT64)PartitionDesc->PartitionStartingLocation +
+ ShortAd->ExtentPosition;
+}
+
+//
+// Find File Set Descriptor of a given Logical Volume Descriptor.
+//
+// The found FSD will contain the extent (LogicalVolumeContentsUse) where our
+// root directory is.
+//
+EFI_STATUS
+FindFileSetDescriptor (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UINTN LogicalVolDescNum,
+ OUT UDF_FILE_SET_DESCRIPTOR *FileSetDesc
+ )
+{
+ EFI_STATUS Status;
+ UINT64 Lsn;
+ UDF_LOGICAL_VOLUME_DESCRIPTOR *LogicalVolDesc;
+
+ LogicalVolDesc = Volume->LogicalVolDescs[LogicalVolDescNum];
+ Lsn = GetLongAdLsn (Volume, &LogicalVolDesc->LogicalVolumeContentsUse);
+
+ //
+ // Read extent (Long Ad).
+ //
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ MultU64x32 (Lsn, LogicalVolDesc->LogicalBlockSize),
+ sizeof (UDF_FILE_SET_DESCRIPTOR),
+ (VOID *)FileSetDesc
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Check if the read extent contains a valid FSD's tag identifier.
+ //
+ if (!IS_FSD (FileSetDesc)) {
+ return EFI_VOLUME_CORRUPTED;
+ }
+
+ return EFI_SUCCESS;
+}
+
+//
+// Get all File Set Descriptors for each Logical Volume Descriptor.
+//
+EFI_STATUS
+GetFileSetDescriptors (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN OUT UDF_VOLUME_INFO *Volume
+ )
+{
+ EFI_STATUS Status;
+ UINTN Index;
+ UDF_FILE_SET_DESCRIPTOR *FileSetDesc;
+ UINTN Count;
+
+ Volume->FileSetDescs =
+ (UDF_FILE_SET_DESCRIPTOR **)AllocateZeroPool (
+ Volume->LogicalVolDescsNo * sizeof (UDF_FILE_SET_DESCRIPTOR));
+ if (Volume->FileSetDescs == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ for (Index = 0; Index < Volume->LogicalVolDescsNo; Index++) {
+ FileSetDesc = AllocateZeroPool (sizeof (UDF_FILE_SET_DESCRIPTOR));
+ if (FileSetDesc == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error_Alloc_Fsd;
+ }
+
+ //
+ // Find a FSD for this LVD.
+ //
+ Status = FindFileSetDescriptor (
+ BlockIo,
+ DiskIo,
+ Volume,
+ Index,
+ FileSetDesc
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Find_Fsd;
+ }
+
+ //
+ // Got one. Save it.
+ //
+ Volume->FileSetDescs[Index] = FileSetDesc;
+ }
+
+ Volume->FileSetDescsNo = Volume->LogicalVolDescsNo;
+ return EFI_SUCCESS;
+
+Error_Find_Fsd:
+ Count = Index + 1;
+ for (Index = 0; Index < Count; Index++) {
+ FreePool ((VOID *)Volume->FileSetDescs[Index]);
+ }
+
+ FreePool ((VOID *)Volume->FileSetDescs);
+ Volume->FileSetDescs = NULL;
+
+Error_Alloc_Fsd:
+ return Status;
+}
+
+//
+// Read Volume and File Structure on an UDF file system.
+//
+EFI_STATUS
+ReadVolumeFileStructure (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ OUT UDF_VOLUME_INFO *Volume
+ )
+{
+ EFI_STATUS Status;
+ UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER AnchorPoint;
+
+ //
+ // Find an AVDP.
+ //
+ Status = FindAnchorVolumeDescriptorPointer (
+ BlockIo,
+ DiskIo,
+ &AnchorPoint
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // AVDP has been found. Start MVDS.
+ //
+ Status = StartMainVolumeDescriptorSequence (
+ BlockIo,
+ DiskIo,
+ &AnchorPoint,
+ Volume
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ return Status;
+}
+
+//
+// Calculate length of a given File Identifier Descriptor.
+//
+UINT64
+GetFidDescriptorLength (
+ IN UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc
+ )
+{
+ return (UINT64)(
+ (INTN)((OFFSET_OF (UDF_FILE_IDENTIFIER_DESCRIPTOR, Data[0]) + 3 +
+ FileIdentifierDesc->LengthOfFileIdentifier +
+ FileIdentifierDesc->LengthOfImplementationUse) >> 2) << 2
+ );
+}
+
+//
+// Duplicate a given File Identifier Descriptor.
+//
+VOID
+DuplicateFid (
+ IN UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc,
+ OUT UDF_FILE_IDENTIFIER_DESCRIPTOR **NewFileIdentifierDesc
+ )
+{
+ *NewFileIdentifierDesc =
+ (UDF_FILE_IDENTIFIER_DESCRIPTOR *)AllocateCopyPool (
+ GetFidDescriptorLength (FileIdentifierDesc), FileIdentifierDesc);
+}
+
+//
+// Duplicate either a given File Entry or a given Extended File Entry.
+//
+VOID
+DuplicateFe (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN VOID *FileEntry,
+ OUT VOID **NewFileEntry
+ )
+{
+ *NewFileEntry = AllocateCopyPool (Volume->FileEntrySize, FileEntry);
+}
+
+//
+// Get raw data + length of a given File Entry or Extended File Entry.
+//
+// The file's recorded data can contain either real file content (inline) or
+// a sequence of extents (or Allocation Descriptors) which tells where file's
+// content is stored in.
+//
+// NOTE: The FE/EFE can be thought it was an inode.
+//
+VOID
+GetFileEntryData (
+ IN VOID *FileEntryData,
+ OUT VOID **Data,
+ OUT UINT64 *Length
+ )
+{
+ UDF_EXTENDED_FILE_ENTRY *ExtendedFileEntry;
+ UDF_FILE_ENTRY *FileEntry;
+
+ if (IS_EFE (FileEntryData)) {
+ ExtendedFileEntry = (UDF_EXTENDED_FILE_ENTRY *)FileEntryData;
+
+ *Length = ExtendedFileEntry->InformationLength;
+ *Data = (VOID *)((UINT8 *)ExtendedFileEntry->Data +
+ ExtendedFileEntry->LengthOfExtendedAttributes);
+ } else if (IS_FE (FileEntryData)) {
+ FileEntry = (UDF_FILE_ENTRY *)FileEntryData;
+
+ *Length = FileEntry->InformationLength;
+ *Data = (VOID *)((UINT8 *)FileEntry->Data +
+ FileEntry->LengthOfExtendedAttributes);
+ }
+}
+
+//
+// Get Allocation Descriptors' data information from a given FE/EFE.
+//
+VOID
+GetAdsInformation (
+ IN VOID *FileEntryData,
+ OUT VOID **AdsData,
+ OUT UINT64 *Length
+ )
+{
+ UDF_EXTENDED_FILE_ENTRY *ExtendedFileEntry;
+ UDF_FILE_ENTRY *FileEntry;
+
+ if (IS_EFE (FileEntryData)) {
+ ExtendedFileEntry = (UDF_EXTENDED_FILE_ENTRY *)FileEntryData;
+
+ *Length = ExtendedFileEntry->LengthOfAllocationDescriptors;
+ *AdsData = (VOID *)((UINT8 *)ExtendedFileEntry->Data +
+ ExtendedFileEntry->LengthOfExtendedAttributes);
+ } else if (IS_FE (FileEntryData)) {
+ FileEntry = (UDF_FILE_ENTRY *)FileEntryData;
+
+ *Length = FileEntry->LengthOfAllocationDescriptors;
+ *AdsData = (VOID *)((UINT8 *)FileEntry->Data +
+ FileEntry->LengthOfExtendedAttributes);
+ }
+}
+
+//
+// Read next Long Allocation Descriptor from a given file's data.
+//
+EFI_STATUS
+GetLongAdFromAds (
+ IN VOID *Data,
+ IN OUT UINT64 *Offset,
+ IN UINT64 Length,
+ OUT UDF_LONG_ALLOCATION_DESCRIPTOR **FoundLongAd
+ )
+{
+ UDF_LONG_ALLOCATION_DESCRIPTOR *LongAd;
+ UDF_EXTENT_FLAGS ExtentFlags;
+
+ for (;;) {
+ if (*Offset >= Length) {
+ //
+ // No more Long Allocation Descriptors.
+ //
+ return EFI_DEVICE_ERROR;
+ }
+
+ LongAd =
+ (UDF_LONG_ALLOCATION_DESCRIPTOR *)((UINT8 *)Data + *Offset);
+
+ //
+ // If it's either an indirect AD (Extended Alllocation Descriptor) or an
+ // allocated AD, then return it.
+ //
+ ExtentFlags = GET_EXTENT_FLAGS (LONG_ADS_SEQUENCE, LongAd);
+ if (ExtentFlags == EXTENT_IS_NEXT_EXTENT ||
+ ExtentFlags == EXTENT_RECORDED_AND_ALLOCATED) {
+ break;
+ }
+
+ //
+ // This AD is either not recorded but allocated, or not recorded and not
+ // allocated. Skip it.
+ //
+ *Offset += AD_LENGTH (LONG_ADS_SEQUENCE);
+ }
+
+ *FoundLongAd = LongAd;
+
+ return EFI_SUCCESS;
+}
+
+//
+// Read next Short Allocation Descriptor from a given file's data.
+//
+EFI_STATUS
+GetShortAdFromAds (
+ IN VOID *Data,
+ IN OUT UINT64 *Offset,
+ IN UINT64 Length,
+ OUT UDF_SHORT_ALLOCATION_DESCRIPTOR **FoundShortAd
+ )
+{
+ UDF_SHORT_ALLOCATION_DESCRIPTOR *ShortAd;
+ UDF_EXTENT_FLAGS ExtentFlags;
+
+ for (;;) {
+ if (*Offset >= Length) {
+ //
+ // No more Short Allocation Descriptors.
+ //
+ return EFI_DEVICE_ERROR;
+ }
+
+ ShortAd =
+ (UDF_SHORT_ALLOCATION_DESCRIPTOR *)((UINT8 *)Data + *Offset);
+
+ //
+ // If it's either an indirect AD (Extended Alllocation Descriptor) or an
+ // allocated AD, then return it.
+ //
+ ExtentFlags = GET_EXTENT_FLAGS (SHORT_ADS_SEQUENCE, ShortAd);
+ if (ExtentFlags == EXTENT_IS_NEXT_EXTENT ||
+ ExtentFlags == EXTENT_RECORDED_AND_ALLOCATED) {
+ break;
+ }
+
+ //
+ // This AD is either not recorded but allocated, or not recorded and not
+ // allocated. Skip it.
+ //
+ *Offset += AD_LENGTH (SHORT_ADS_SEQUENCE);
+ }
+
+ *FoundShortAd = ShortAd;
+
+ return EFI_SUCCESS;
+}
+
+//
+// Get either a Short Allocation Descriptor or a Long Allocation Descriptor from
+// file's data.
+//
+EFI_STATUS
+GetAllocationDescriptor (
+ IN UDF_FE_RECORDING_FLAGS RecordingFlags,
+ IN VOID *Data,
+ IN OUT UINT64 *Offset,
+ IN UINT64 Length,
+ OUT VOID **FoundAd
+ )
+{
+ if (RecordingFlags == LONG_ADS_SEQUENCE) {
+ return GetLongAdFromAds (
+ Data,
+ Offset,
+ Length,
+ (UDF_LONG_ALLOCATION_DESCRIPTOR **)FoundAd
+ );
+ } else if (RecordingFlags == SHORT_ADS_SEQUENCE) {
+ return GetShortAdFromAds (
+ Data,
+ Offset,
+ Length,
+ (UDF_SHORT_ALLOCATION_DESCRIPTOR **)FoundAd
+ );
+ }
+
+ return EFI_DEVICE_ERROR;
+}
+
+//
+// Return logical sector number of either Short or Long Allocation Descriptor.
+//
+UINT64
+GetAllocationDescriptorLsn (
+ IN UDF_FE_RECORDING_FLAGS RecordingFlags,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,
+ IN VOID *Ad
+ )
+{
+ if (RecordingFlags == LONG_ADS_SEQUENCE) {
+ return GetLongAdLsn (Volume, (UDF_LONG_ALLOCATION_DESCRIPTOR *)Ad);
+ } else if (RecordingFlags == SHORT_ADS_SEQUENCE) {
+ return GetShortAdLsn (
+ GetPdFromLongAd (Volume, ParentIcb),
+ (UDF_SHORT_ALLOCATION_DESCRIPTOR *)Ad
+ );
+ }
+
+ return 0;
+}
+
+//
+// Return offset + length of a given indirect Allocation Descriptor (AED).
+//
+EFI_STATUS
+GetAedAdsOffset (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,
+ IN UDF_FE_RECORDING_FLAGS RecordingFlags,
+ IN VOID *Ad,
+ OUT UINT64 *Offset,
+ OUT UINT64 *Length
+ )
+{
+ EFI_STATUS Status;
+ UINT32 ExtentLength;
+ UINT64 Lsn;
+ VOID *Data;
+ UINT32 LogicalBlockSize;
+ UDF_ALLOCATION_EXTENT_DESCRIPTOR *AllocExtDesc;
+
+ ExtentLength = GET_EXTENT_LENGTH (RecordingFlags, Ad);
+ Lsn = GetAllocationDescriptorLsn (RecordingFlags,
+ Volume,
+ ParentIcb,
+ Ad);
+
+ Data = AllocatePool (ExtentLength);
+ if (Data == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ LogicalBlockSize = LV_BLOCK_SIZE (Volume, UDF_DEFAULT_LV_NUM);
+
+ //
+ // Read extent.
+ //
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ MultU64x32 (Lsn, LogicalBlockSize),
+ ExtentLength,
+ Data
+ );
+ if (EFI_ERROR (Status)) {
+ goto Exit;
+ }
+
+ //
+ // Check if read extent contains a valid tag identifier for AED.
+ //
+ AllocExtDesc = (UDF_ALLOCATION_EXTENT_DESCRIPTOR *)Data;
+ if (!IS_AED (AllocExtDesc)) {
+ Status = EFI_VOLUME_CORRUPTED;
+ goto Exit;
+ }
+
+ //
+ // Get AED's block offset and its length.
+ //
+ *Offset = MultU64x32 (Lsn, LogicalBlockSize) +
+ sizeof (UDF_ALLOCATION_EXTENT_DESCRIPTOR);
+ *Length = AllocExtDesc->LengthOfAllocationDescriptors;
+
+Exit:
+ FreePool (Data);
+
+ return Status;
+}
+
+//
+// Read Allocation Extent Descriptor into memory.
+//
+EFI_STATUS
+GetAedAdsData (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,
+ IN UDF_FE_RECORDING_FLAGS RecordingFlags,
+ IN VOID *Ad,
+ OUT VOID **Data,
+ OUT UINT64 *Length
+ )
+{
+ EFI_STATUS Status;
+ UINT64 Offset;
+
+ //
+ // Get AED's offset + length.
+ //
+ Status = GetAedAdsOffset (
+ BlockIo,
+ DiskIo,
+ Volume,
+ ParentIcb,
+ RecordingFlags,
+ Ad,
+ &Offset,
+ Length
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Allocate buffer to read in AED's data.
+ //
+ *Data = AllocatePool (*Length);
+ if (*Data == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ return DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ Offset,
+ *Length,
+ *Data
+ );
+}
+
+//
+// Function used to serialise reads of Allocation Descriptors.
+//
+EFI_STATUS
+GrowUpBufferToNextAd (
+ IN UDF_FE_RECORDING_FLAGS RecordingFlags,
+ IN VOID *Ad,
+ IN OUT VOID **Buffer,
+ IN UINT64 Length
+ )
+{
+ UINT32 ExtentLength;
+
+ ExtentLength = GET_EXTENT_LENGTH (RecordingFlags, Ad);
+
+ if (*Buffer == NULL) {
+ *Buffer = AllocatePool (ExtentLength);
+ if (*Buffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ } else {
+ *Buffer = ReallocatePool (Length, Length + ExtentLength, *Buffer);
+ if (*Buffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ }
+
+ return EFI_SUCCESS;
+}
+
+//
+// Read data or size of either a File Entry or an Extended File Entry.
+//
+EFI_STATUS
+ReadFile (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,
+ IN VOID *FileEntryData,
+ IN OUT UDF_READ_FILE_INFO *ReadFileInfo
+ )
+{
+ EFI_STATUS Status;
+ UINT32 LogicalBlockSize;
+ VOID *Data;
+ UINT64 Length;
+ VOID *Ad;
+ UINT64 AdOffset;
+ UINT64 Lsn;
+ BOOLEAN DoFreeAed;
+ UINT64 FilePosition;
+ UINT64 Offset;
+ UINT64 DataOffset;
+ UINT64 BytesLeft;
+ UINT64 DataLength;
+ BOOLEAN FinishedSeeking;
+ UINT32 ExtentLength;
+ UDF_FE_RECORDING_FLAGS RecordingFlags;
+
+ LogicalBlockSize = LV_BLOCK_SIZE (Volume, UDF_DEFAULT_LV_NUM);
+ DoFreeAed = FALSE;
+
+ switch (ReadFileInfo->Flags) {
+ case READ_FILE_GET_FILESIZE:
+ case READ_FILE_ALLOCATE_AND_READ:
+ //
+ // Initialise ReadFileInfo structure for either getting file size, or
+ // reading file's recorded data.
+ //
+ ReadFileInfo->ReadLength = 0;
+ ReadFileInfo->FileData = NULL;
+ break;
+ case READ_FILE_SEEK_AND_READ:
+ //
+ // About to seek a file and/or read its data.
+ //
+ Length = ReadFileInfo->FileSize - ReadFileInfo->FilePosition;
+ if (ReadFileInfo->FileDataSize > Length) {
+ //
+ // About to read beyond the EOF -- truncate it.
+ //
+ ReadFileInfo->FileDataSize = Length;
+ }
+
+ //
+ // Initialise data to start seeking and/or reading a file.
+ //
+ BytesLeft = ReadFileInfo->FileDataSize;
+ DataOffset = 0;
+ FilePosition = 0;
+ FinishedSeeking = FALSE;
+
+ break;
+ }
+
+ RecordingFlags = GET_FE_RECORDING_FLAGS (FileEntryData);
+ switch (RecordingFlags) {
+ case INLINE_DATA:
+ //
+ // There are no extents for this FE/EFE. All data is inline.
+ //
+ GetFileEntryData (FileEntryData, &Data, &Length);
+
+ if (ReadFileInfo->Flags == READ_FILE_GET_FILESIZE) {
+ ReadFileInfo->ReadLength = Length;
+ } else if (ReadFileInfo->Flags == READ_FILE_ALLOCATE_AND_READ) {
+ //
+ // Allocate buffer for starting read data.
+ //
+ ReadFileInfo->FileData = AllocatePool (Length);
+ if (ReadFileInfo->FileData == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ //
+ // Read all inline data into ReadFileInfo->FileData
+ //
+ CopyMem (ReadFileInfo->FileData, Data, Length);
+ ReadFileInfo->ReadLength = Length;
+ } else if (ReadFileInfo->Flags == READ_FILE_SEEK_AND_READ) {
+ //
+ // If FilePosition is non-zero, seek file to FilePosition, read
+ // FileDataSize bytes and then updates FilePosition.
+ //
+ CopyMem (
+ ReadFileInfo->FileData,
+ (VOID *)((UINT8 *)Data + ReadFileInfo->FilePosition),
+ ReadFileInfo->FileDataSize
+ );
+
+ ReadFileInfo->FilePosition += ReadFileInfo->FileDataSize;
+ }
+
+ break;
+ case LONG_ADS_SEQUENCE:
+ case SHORT_ADS_SEQUENCE:
+ //
+ // This FE/EFE contains a run of Allocation Descriptors. Get data + size
+ // for start reading them out.
+ //
+ GetAdsInformation (FileEntryData, &Data, &Length);
+ AdOffset = 0;
+
+ for (;;) {
+ //
+ // Read AD.
+ //
+ Status = GetAllocationDescriptor (
+ RecordingFlags,
+ Data,
+ &AdOffset,
+ Length,
+ &Ad
+ );
+ if (Status == EFI_DEVICE_ERROR) {
+ Status = EFI_SUCCESS;
+ goto Done;
+ }
+
+ //
+ // Check if AD is an indirect AD. If so, read Allocation Extent
+ // Descriptor and its extents (ADs).
+ //
+ if (GET_EXTENT_FLAGS (RecordingFlags, Ad) == EXTENT_IS_NEXT_EXTENT) {
+ if (!DoFreeAed) {
+ DoFreeAed = TRUE;
+ } else {
+ FreePool (Data);
+ }
+
+ Status = GetAedAdsData (
+ BlockIo,
+ DiskIo,
+ Volume,
+ ParentIcb,
+ RecordingFlags,
+ Ad,
+ &Data,
+ &Length
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Get_Aed;
+ }
+
+ AdOffset = 0;
+ continue;
+ }
+
+ ExtentLength = GET_EXTENT_LENGTH (RecordingFlags, Ad);
+
+ Lsn = GetAllocationDescriptorLsn (RecordingFlags,
+ Volume,
+ ParentIcb,
+ Ad);
+
+ switch (ReadFileInfo->Flags) {
+ case READ_FILE_GET_FILESIZE:
+ ReadFileInfo->ReadLength += ExtentLength;
+ break;
+ case READ_FILE_ALLOCATE_AND_READ:
+ //
+ // Increase FileData (if necessary) to read next extent.
+ //
+ Status = GrowUpBufferToNextAd (
+ RecordingFlags,
+ Ad,
+ &ReadFileInfo->FileData,
+ ReadFileInfo->ReadLength
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Alloc_Buffer_To_Next_Ad;
+ }
+
+ //
+ // Read extent's data into FileData.
+ //
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ MultU64x32 (Lsn, LogicalBlockSize),
+ ExtentLength,
+ (VOID *)((UINT8 *)ReadFileInfo->FileData +
+ ReadFileInfo->ReadLength)
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Read_Disk_Blk;
+ }
+
+ ReadFileInfo->ReadLength += ExtentLength;
+ break;
+ case READ_FILE_SEEK_AND_READ:
+ //
+ // Seek file first before reading in its data.
+ //
+ if (FinishedSeeking) {
+ Offset = 0;
+ goto Skip_File_Seek;
+ }
+
+ if (FilePosition + ExtentLength < ReadFileInfo->FilePosition) {
+ FilePosition += ExtentLength;
+ goto Skip_Ad;
+ }
+
+ if (FilePosition + ExtentLength > ReadFileInfo->FilePosition) {
+ Offset = ReadFileInfo->FilePosition - FilePosition;
+ if (Offset < 0) {
+ Offset = -(Offset);
+ }
+ } else {
+ Offset = 0;
+ }
+
+ //
+ // Done with seeking file. Start reading its data.
+ //
+ FinishedSeeking = TRUE;
+
+ Skip_File_Seek:
+ //
+ // Make sure we don't read more data than really wanted.
+ //
+ if (ExtentLength - Offset > BytesLeft) {
+ DataLength = BytesLeft;
+ } else {
+ DataLength = ExtentLength - Offset;
+ }
+
+ //
+ // Read extent's data into FileData.
+ //
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ Offset + MultU64x32 (Lsn, LogicalBlockSize),
+ DataLength,
+ (VOID *)((UINT8 *)ReadFileInfo->FileData +
+ DataOffset)
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Read_Disk_Blk;
+ }
+
+ //
+ // Update current file's position.
+ //
+ DataOffset += DataLength;
+ ReadFileInfo->FilePosition += DataLength;
+
+ BytesLeft -= DataLength;
+ if (BytesLeft == 0) {
+ //
+ // There is no more file data to read.
+ //
+ Status = EFI_SUCCESS;
+ goto Done;
+ }
+
+ break;
+ }
+
+ Skip_Ad:
+ //
+ // Point to the next AD (extent).
+ //
+ AdOffset += AD_LENGTH (RecordingFlags);
+ }
+
+ break;
+ case EXTENDED_ADS_SEQUENCE:
+ // FIXME: Not supported. Got no volume with it, yet.
+ ASSERT (FALSE);
+ Status = EFI_UNSUPPORTED;
+ break;
+ }
+
+Done:
+ if (DoFreeAed) {
+ FreePool (Data);
+ }
+
+ return Status;
+
+Error_Read_Disk_Blk:
+Error_Alloc_Buffer_To_Next_Ad:
+ if (ReadFileInfo->Flags != READ_FILE_SEEK_AND_READ) {
+ FreePool (ReadFileInfo->FileData);
+ }
+
+ if (DoFreeAed) {
+ FreePool (Data);
+ }
+
+Error_Get_Aed:
+ return Status;
+}
+
+//
+// Find a file by its filename from a given Parent file.
+//
+EFI_STATUS
+InternalFindFile (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN CHAR16 *FileName,
+ IN UDF_FILE_INFO *Parent,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,
+ OUT UDF_FILE_INFO *File
+ )
+{
+ EFI_STATUS Status;
+ UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc;
+ UDF_READ_DIRECTORY_INFO ReadDirInfo;
+ BOOLEAN Found;
+ CHAR16 FoundFileName[UDF_FILENAME_LENGTH];
+ VOID *CompareFileEntry;
+
+ //
+ // Check if parent file is really directory.
+ //
+ if (!IS_FE_DIRECTORY (Parent->FileEntry)) {
+ return EFI_NOT_FOUND;
+ }
+
+ //
+ // If FileName is current file or working directory, just duplicate Parent's
+ // FE/EFE and FID descriptors.
+ //
+ if (StrCmp (FileName, L".") == 0) {
+ DuplicateFe (BlockIo, Volume, Parent->FileEntry, &File->FileEntry);
+ DuplicateFid (Parent->FileIdentifierDesc, &File->FileIdentifierDesc);
+
+ return EFI_SUCCESS;
+ }
+
+ //
+ // Start directory listing.
+ //
+ ZeroMem ((VOID *)&ReadDirInfo, sizeof (UDF_READ_DIRECTORY_INFO));
+ Found = FALSE;
+
+ for (;;) {
+ Status = ReadDirectoryEntry (
+ BlockIo,
+ DiskIo,
+ Volume,
+ Parent->FileIdentifierDesc ?
+ &Parent->FileIdentifierDesc->Icb :
+ Icb,
+ Parent->FileEntry,
+ &ReadDirInfo,
+ &FileIdentifierDesc
+ );
+ if (EFI_ERROR (Status)) {
+ if (Status == EFI_DEVICE_ERROR) {
+ Status = EFI_NOT_FOUND;
+ }
+
+ break;
+ }
+
+ if (IS_FID_PARENT_FILE (FileIdentifierDesc)) {
+ //
+ // This FID contains the location (FE/EFE) of the parent directory of this
+ // directory (Parent), and if FileName is either ".." or "\\", then it's
+ // the expected FID.
+ //
+ if (StrCmp (FileName, L"..") == 0 || StrCmp (FileName, L"\\") == 0) {
+ Found = TRUE;
+ break;
+ }
+ } else {
+ Status = GetFileNameFromFid (FileIdentifierDesc, FoundFileName);
+ if (EFI_ERROR (Status)) {
+ break;
+ }
+
+ if (StrCmp (FileName, FoundFileName) == 0) {
+ //
+ // FID has been found. Prepare to find its respective FE/EFE.
+ //
+ Found = TRUE;
+ break;
+ }
+ }
+
+ FreePool ((VOID *)FileIdentifierDesc);
+ }
+
+ if (ReadDirInfo.DirectoryData != NULL) {
+ //
+ // Free all allocated resources for the directory listing.
+ //
+ FreePool (ReadDirInfo.DirectoryData);
+ }
+
+ if (Found) {
+ Status = EFI_SUCCESS;
+
+ File->FileIdentifierDesc = FileIdentifierDesc;
+
+ //
+ // If the requested file is root directory, then the FE/EFE was already
+ // retrieved in UdfOpenVolume() function, thus no need to find it again.
+ //
+ // Otherwise, find FE/EFE from the respective FID.
+ //
+ if (StrCmp (FileName, L"\\") != 0) {
+ Status = FindFileEntry (
+ BlockIo,
+ DiskIo,
+ Volume,
+ &FileIdentifierDesc->Icb,
+ &CompareFileEntry
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Find_Fe;
+ }
+
+ //
+ // Make sure that both Parent's FE/EFE and found FE/EFE are not equal.
+ //
+ if (CompareMem ((VOID *)Parent->FileEntry, (VOID *)CompareFileEntry,
+ Volume->FileEntrySize) != 0) {
+ File->FileEntry = CompareFileEntry;
+ } else {
+ FreePool ((VOID *)FileIdentifierDesc);
+ FreePool ((VOID *)CompareFileEntry);
+ Status = EFI_NOT_FOUND;
+ }
+ }
+ }
+
+ return Status;
+
+Error_Find_Fe:
+ FreePool ((VOID *)FileIdentifierDesc);
+
+ return Status;
+}
+
+/**
+ Read volume information on a medium which contains a valid UDF file system.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[out] Volume UDF volume information structure.
+
+ @retval EFI_SUCCESS Volume information 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_OUT_OF_RESOURCES The volume was not read due to lack of resources.
+
+**/
+EFI_STATUS
+ReadUdfVolumeInformation (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ OUT UDF_VOLUME_INFO *Volume
+ )
+{
+ EFI_STATUS Status;
+
+ Status = ReadVolumeFileStructure (
+ BlockIo,
+ DiskIo,
+ Volume
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Status = GetFileSetDescriptors (
+ BlockIo,
+ DiskIo,
+ Volume
+ );
+ if (EFI_ERROR (Status)) {
+ CleanupVolumeInformation (Volume);
+ }
+
+ return Status;
+}
+
+/**
+ Find the root directory on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[out] File Root directory file.
+
+ @retval EFI_SUCCESS Root directory found.
+ @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_OUT_OF_RESOURCES The root directory was not found due to lack of
+ resources.
+
+**/
+EFI_STATUS
+FindRootDirectory (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ OUT UDF_FILE_INFO *File
+ )
+{
+ EFI_STATUS Status;
+ UDF_FILE_INFO Parent;
+
+ Status = FindFileEntry (
+ BlockIo,
+ DiskIo,
+ Volume,
+ &Volume->FileSetDescs[0]->RootDirectoryIcb,
+ &File->FileEntry
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Parent.FileEntry = File->FileEntry;
+ Parent.FileIdentifierDesc = NULL;
+
+ Status = FindFile (
+ BlockIo,
+ DiskIo,
+ Volume,
+ L"\\",
+ NULL,
+ &Parent,
+ &Volume->FileSetDescs[0]->RootDirectoryIcb,
+ File
+ );
+ if (EFI_ERROR (Status)) {
+ FreePool (File->FileEntry);
+ }
+
+ return Status;
+}
+
+/**
+ Find either a File Entry or a Extended File Entry from a given ICB.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] Icb ICB of the FID.
+ @param[out] FileEntry File Entry or Extended File Entry.
+
+ @retval EFI_SUCCESS File Entry or Extended File Entry found.
+ @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_OUT_OF_RESOURCES The FE/EFE entry was not found due to lack of
+ resources.
+
+**/
+EFI_STATUS
+FindFileEntry (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,
+ OUT VOID **FileEntry
+ )
+{
+ EFI_STATUS Status;
+ UINT64 Lsn;
+ UINT32 LogicalBlockSize;
+
+ Lsn = GetLongAdLsn (Volume, Icb);
+ LogicalBlockSize = LV_BLOCK_SIZE (Volume, UDF_DEFAULT_LV_NUM);
+
+ *FileEntry = AllocateZeroPool (Volume->FileEntrySize);
+ if (*FileEntry == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ //
+ // Read extent.
+ //
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ MultU64x32 (Lsn, LogicalBlockSize),
+ Volume->FileEntrySize,
+ *FileEntry
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Read_Disk_Blk;
+ }
+
+ //
+ // Check if the read extent contains a valid Tag Identifier for the expected
+ // FE/EFE.
+ //
+ if (!IS_FE (*FileEntry) && !IS_EFE (*FileEntry)) {
+ Status = EFI_VOLUME_CORRUPTED;
+ goto Error_Invalid_Fe;
+ }
+
+ return EFI_SUCCESS;
+
+Error_Invalid_Fe:
+Error_Read_Disk_Blk:
+ FreePool (*FileEntry);
+
+ return Status;
+}
+
+/**
+ Find a file given its absolute path on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] FilePath File's absolute path.
+ @param[in] Root Root directory file.
+ @param[in] Parent Parent directory file.
+ @param[out] File Found file.
+
+ @retval EFI_SUCCESS @p FilePath was found.
+ @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_OUT_OF_RESOURCES The @p FilePath file was not found due to lack of
+ resources.
+
+**/
+EFI_STATUS
+FindFile (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN CHAR16 *FilePath,
+ IN UDF_FILE_INFO *Root,
+ IN UDF_FILE_INFO *Parent,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,
+ OUT UDF_FILE_INFO *File
+ )
+{
+ EFI_STATUS Status;
+ CHAR16 FileName[UDF_FILENAME_LENGTH];
+ CHAR16 *FileNamePointer;
+ UDF_FILE_INFO PreviousFile;
+ VOID *FileEntry;
+
+ Status = EFI_NOT_FOUND;
+
+ CopyMem ((VOID *)&PreviousFile, (VOID *)Parent, sizeof (UDF_FILE_INFO));
+ while (*FilePath != L'\0') {
+ FileNamePointer = FileName;
+ while (*FilePath != L'\0' && *FilePath != L'\\') {
+ *FileNamePointer++ = *FilePath++;
+ }
+
+ *FileNamePointer = L'\0';
+ if (FileName[0] == L'\0') {
+ //
+ // Open root directory.
+ //
+ if (Root == NULL) {
+ //
+ // There is no file found for the root directory yet. So, find only its
+ // FID by now.
+ //
+ // See UdfOpenVolume() function.
+ //
+ Status = InternalFindFile (BlockIo,
+ DiskIo,
+ Volume,
+ L"\\",
+ &PreviousFile,
+ Icb,
+ File);
+ } else {
+ //
+ // We've already a file pointer (Root) for the root directory. Duplicate
+ // its FE/EFE and FID descriptors.
+ //
+ DuplicateFe (BlockIo, Volume, Root->FileEntry, &File->FileEntry);
+ DuplicateFid (Root->FileIdentifierDesc, &File->FileIdentifierDesc);
+ Status = EFI_SUCCESS;
+ }
+ } else {
+ //
+ // No root directory. Find filename from the current directory.
+ //
+ Status = InternalFindFile (BlockIo,
+ DiskIo,
+ Volume,
+ FileName,
+ &PreviousFile,
+ Icb,
+ File);
+ }
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // If the found file is a symlink, then find its respective FE/EFE and
+ // FID descriptors.
+ //
+ if (IS_FE_SYMLINK (File->FileEntry)) {
+ FreePool ((VOID *)File->FileIdentifierDesc);
+
+ FileEntry = File->FileEntry;
+
+ Status = ResolveSymlink (BlockIo,
+ DiskIo,
+ Volume,
+ &PreviousFile,
+ FileEntry,
+ File);
+
+ FreePool (FileEntry);
+
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ }
+
+ if (CompareMem ((VOID *)&PreviousFile, (VOID *)Parent,
+ sizeof (UDF_FILE_INFO)) != 0) {
+ CleanupFileInformation (&PreviousFile);
+ }
+
+ CopyMem ((VOID *)&PreviousFile, (VOID *)File, sizeof (UDF_FILE_INFO));
+ if (*FilePath != L'\0' && *FilePath == L'\\') {
+ FilePath++;
+ }
+ }
+
+ return Status;
+}
+
+/**
+ Read a directory entry at a time on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] ParentIcb ICB of the parent file.
+ @param[in] FileEntryData FE/EFE of the parent file.
+ @param[in out] ReadDirInfo Next read directory listing structure
+ information.
+ @param[out] FoundFid File Identifier Descriptor pointer.
+
+ @retval EFI_SUCCESS Directory entry read.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The directory entry was not read due to lack of
+ resources.
+
+**/
+EFI_STATUS
+ReadDirectoryEntry (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,
+ IN VOID *FileEntryData,
+ IN OUT UDF_READ_DIRECTORY_INFO *ReadDirInfo,
+ OUT UDF_FILE_IDENTIFIER_DESCRIPTOR **FoundFid
+ )
+{
+ EFI_STATUS Status;
+ UDF_READ_FILE_INFO ReadFileInfo;
+ UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc;
+
+ if (ReadDirInfo->DirectoryData == NULL) {
+ //
+ // The directory's recorded data has not been read yet. So let's cache it
+ // into memory and the next calls won't need to read it again.
+ //
+ ReadFileInfo.Flags = READ_FILE_ALLOCATE_AND_READ;
+
+ Status = ReadFile (
+ BlockIo,
+ DiskIo,
+ Volume,
+ ParentIcb,
+ FileEntryData,
+ &ReadFileInfo
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Fill in ReadDirInfo structure with the read directory's data information.
+ //
+ ReadDirInfo->DirectoryData = ReadFileInfo.FileData;
+ ReadDirInfo->DirectoryLength = ReadFileInfo.ReadLength;
+ }
+
+ do {
+ if (ReadDirInfo->FidOffset >= ReadDirInfo->DirectoryLength) {
+ //
+ // There are no longer FIDs for this directory. By returning
+ // EFI_DEVICE_ERROR to the callee will indicate end of directory
+ // listening.
+ //
+ return EFI_DEVICE_ERROR;
+ }
+
+ //
+ // Get FID for this entry.
+ //
+ FileIdentifierDesc = GET_FID_FROM_ADS (ReadDirInfo->DirectoryData,
+ ReadDirInfo->FidOffset);
+ //
+ // Update FidOffset to point to next FID.
+ //
+ ReadDirInfo->FidOffset += GetFidDescriptorLength (FileIdentifierDesc);
+ } while (IS_FID_DELETED_FILE (FileIdentifierDesc));
+
+ DuplicateFid (FileIdentifierDesc, FoundFid);
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Get a filename (encoded in OSTA-compressed format) from a File Identifier
+ Descriptor on an UDF volume.
+
+ @param[in] FileIdentifierDesc File Identifier Descriptor pointer.
+ @param[out] FileName Decoded filename.
+
+ @retval EFI_SUCCESS Filename decoded and read.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+**/
+EFI_STATUS
+GetFileNameFromFid (
+ IN UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc,
+ OUT CHAR16 *FileName
+ )
+{
+ UINT8 *OstaCompressed;
+ UINT8 CompressionId;
+ UINT8 Length;
+ UINTN Index;
+
+ OstaCompressed =
+ (UINT8 *)(
+ (UINT8 *)FileIdentifierDesc->Data +
+ FileIdentifierDesc->LengthOfImplementationUse
+ );
+
+ CompressionId = OstaCompressed[0];
+ if (!IS_VALID_COMPRESSION_ID (CompressionId)) {
+ return EFI_VOLUME_CORRUPTED;
+ }
+
+ //
+ // Decode filename.
+ //
+ Length = FileIdentifierDesc->LengthOfFileIdentifier;
+ for (Index = 1; Index < Length; Index++) {
+ if (CompressionId == 16) {
+ *FileName = OstaCompressed[Index++] << 8;
+ } else {
+ *FileName = 0;
+ }
+
+ if (Index < Length) {
+ *FileName |= OstaCompressed[Index];
+ }
+
+ FileName++;
+ }
+
+ *FileName = L'\0';
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Resolve a symlink file on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] Parent Parent file.
+ @param[in] FileEntryData FE/EFE structure pointer.
+ @param[out] File Resolved file.
+
+ @retval EFI_SUCCESS Symlink file resolved.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The symlink file was not resolved due to lack of
+ resources.
+
+**/
+EFI_STATUS
+ResolveSymlink (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_FILE_INFO *Parent,
+ IN VOID *FileEntryData,
+ OUT UDF_FILE_INFO *File
+ )
+{
+ EFI_STATUS Status;
+ UDF_READ_FILE_INFO ReadFileInfo;
+ UINT8 *Data;
+ UINT64 Length;
+ UINT8 *EndData;
+ UDF_PATH_COMPONENT *PathComp;
+ UINT8 PathCompLength;
+ CHAR16 FileName[UDF_FILENAME_LENGTH];
+ CHAR16 *C;
+ UINTN Index;
+ UINT8 CompressionId;
+ UDF_FILE_INFO PreviousFile;
+
+ //
+ // Symlink files on UDF volumes do not contain so much data other than
+ // Path Components which resolves to real filenames, so it's OK to read in
+ // all its data here -- usually the data will be inline with the FE/EFE for
+ // lower filenames.
+ //
+ ReadFileInfo.Flags = READ_FILE_ALLOCATE_AND_READ;
+
+ Status = ReadFile (
+ BlockIo,
+ DiskIo,
+ Volume,
+ &Parent->FileIdentifierDesc->Icb,
+ FileEntryData,
+ &ReadFileInfo
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ Length = ReadFileInfo.ReadLength;
+
+ Data = (UINT8 *)ReadFileInfo.FileData;
+ EndData = Data + Length;
+
+ CopyMem ((VOID *)&PreviousFile, (VOID *)Parent, sizeof (UDF_FILE_INFO));
+
+ for (;;) {
+ PathComp = (UDF_PATH_COMPONENT *)Data;
+
+ PathCompLength = PathComp->LengthOfComponentIdentifier;
+
+ switch (PathComp->ComponentType) {
+ case 1:
+ //
+ // This Path Component specifies the root directory hierarchy subject to
+ // agreement between the originator and recipient of the medium. Skip it.
+ //
+ // Fall through.
+ //
+ case 2:
+ //
+ // "\\." of the current directory. Read next Path Component.
+ //
+ goto Next_Path_Component;
+ case 3:
+ //
+ // ".." (parent directory). Go to it.
+ //
+ CopyMem ((VOID *)FileName, L"..", 6);
+ break;
+ case 4:
+ //
+ // "." (current file). Duplicate both FE/EFE and FID of this file.
+ //
+ DuplicateFe (BlockIo, Volume, PreviousFile.FileEntry, &File->FileEntry);
+ DuplicateFid (PreviousFile.FileIdentifierDesc,
+ &File->FileIdentifierDesc);
+ goto Next_Path_Component;
+ case 5:
+ //
+ // This Path Component identifies an object, either a file or a
+ // directory or an alias.
+ //
+ // Decode it from the compressed data in ComponentIdentifier and find
+ // respective path.
+ //
+ CompressionId = PathComp->ComponentIdentifier[0];
+ if (!IS_VALID_COMPRESSION_ID (CompressionId)) {
+ return EFI_VOLUME_CORRUPTED;
+ }
+
+ C = FileName;
+ for (Index = 1; Index < PathCompLength; Index++) {
+ if (CompressionId == 16) {
+ *C = *(UINT8 *)((UINT8 *)PathComp->ComponentIdentifier +
+ Index) << 8;
+ Index++;
+ } else {
+ *C = 0;
+ }
+
+ if (Index < Length) {
+ *C |= *(UINT8 *)((UINT8 *)PathComp->ComponentIdentifier + Index);
+ }
+
+ C++;
+ }
+
+ *C = L'\0';
+ break;
+ }
+
+ //
+ // Find file from the read filename in symlink's file data.
+ //
+ Status = InternalFindFile (
+ BlockIo,
+ DiskIo,
+ Volume,
+ FileName,
+ &PreviousFile,
+ NULL,
+ File
+ );
+ if (EFI_ERROR (Status)) {
+ goto Error_Find_File;
+ }
+
+ Next_Path_Component:
+ Data += sizeof (UDF_PATH_COMPONENT) + PathCompLength;
+ if (Data >= EndData) {
+ break;
+ }
+
+ if (CompareMem ((VOID *)&PreviousFile, (VOID *)Parent,
+ sizeof (UDF_FILE_INFO)) != 0) {
+ CleanupFileInformation (&PreviousFile);
+ }
+
+ CopyMem ((VOID *)&PreviousFile, (VOID *)File, sizeof (UDF_FILE_INFO));
+ }
+
+ //
+ // Unmap the symlink file.
+ //
+ FreePool (ReadFileInfo.FileData);
+
+ return EFI_SUCCESS;
+
+Error_Find_File:
+ if (CompareMem ((VOID *)&PreviousFile, (VOID *)Parent,
+ sizeof (UDF_FILE_INFO)) != 0) {
+ CleanupFileInformation (&PreviousFile);
+ }
+
+ FreePool (ReadFileInfo.FileData);
+
+ return Status;
+}
+
+/**
+ Clean up in-memory UDF volume information.
+
+ @param[in] Volume Volume information pointer.
+
+**/
+VOID
+CleanupVolumeInformation (
+ IN UDF_VOLUME_INFO *Volume
+ )
+{
+ UINTN Index;
+
+ if (Volume->LogicalVolDescs != NULL) {
+ for (Index = 0; Index < Volume->LogicalVolDescsNo; Index++) {
+ FreePool ((VOID *)Volume->LogicalVolDescs[Index]);
+ }
+ FreePool ((VOID *)Volume->LogicalVolDescs);
+ }
+
+ if (Volume->PartitionDescs != NULL) {
+ for (Index = 0; Index < Volume->PartitionDescsNo; Index++) {
+ FreePool ((VOID *)Volume->PartitionDescs[Index]);
+ }
+ FreePool ((VOID *)Volume->PartitionDescs);
+ }
+
+ if (Volume->FileSetDescs != NULL) {
+ for (Index = 0; Index < Volume->FileSetDescsNo; Index++) {
+ FreePool ((VOID *)Volume->FileSetDescs[Index]);
+ }
+ FreePool ((VOID *)Volume->FileSetDescs);
+ }
+
+ ZeroMem ((VOID *)Volume, sizeof (UDF_VOLUME_INFO));
+}
+
+/**
+ Clean up in-memory UDF file information.
+
+ @param[in] File File information pointer.
+
+**/
+VOID
+CleanupFileInformation (
+ IN UDF_FILE_INFO *File
+ )
+{
+ if (File->FileEntry != NULL) {
+ FreePool (File->FileEntry);
+ }
+ if (File->FileIdentifierDesc != NULL) {
+ FreePool ((VOID *)File->FileIdentifierDesc);
+ }
+
+ ZeroMem ((VOID *)File, sizeof (UDF_FILE_INFO));
+}
+
+/**
+ Find a file from its absolute path on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] File File information structure.
+ @param[out] Size Size of the file.
+
+ @retval EFI_SUCCESS File size calculated and set in @p Size.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The file size was not calculated due to lack of
+ resources.
+
+**/
+EFI_STATUS
+GetFileSize (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_FILE_INFO *File,
+ OUT UINT64 *Size
+ )
+{
+ EFI_STATUS Status;
+ UDF_READ_FILE_INFO ReadFileInfo;
+
+ ReadFileInfo.Flags = READ_FILE_GET_FILESIZE;
+
+ Status = ReadFile (
+ BlockIo,
+ DiskIo,
+ Volume,
+ &File->FileIdentifierDesc->Icb,
+ File->FileEntry,
+ &ReadFileInfo
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ *Size = ReadFileInfo.ReadLength;
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Set information about a file on an UDF volume.
+
+ @param[in] File File pointer.
+ @param[in] FileSize Size of the file.
+ @param[in] FileName Filename of the file.
+ @param[in out] BufferSize Size of the returned file infomation.
+ @param[out] Buffer Data of the returned file information.
+
+ @retval EFI_SUCCESS File information set.
+ @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_OUT_OF_RESOURCES The file information was not set due to lack of
+ resources.
+
+**/
+EFI_STATUS
+SetFileInfo (
+ IN UDF_FILE_INFO *File,
+ IN UINT64 FileSize,
+ IN CHAR16 *FileName,
+ IN OUT UINTN *BufferSize,
+ OUT VOID *Buffer
+ )
+{
+ UINTN FileInfoLength;
+ EFI_FILE_INFO *FileInfo;
+ UDF_FILE_ENTRY *FileEntry;
+ UDF_EXTENDED_FILE_ENTRY *ExtendedFileEntry;
+
+ //
+ // Calculate the needed size for the EFI_FILE_INFO structure.
+ //
+ FileInfoLength = sizeof (EFI_FILE_INFO) + (FileName ?
+ StrSize (FileName) :
+ sizeof (CHAR16));
+ if (*BufferSize < FileInfoLength) {
+ //
+ // The given Buffer has no size enough for EFI_FILE_INFO structure.
+ //
+ *BufferSize = FileInfoLength;
+ return EFI_BUFFER_TOO_SMALL;
+ }
+
+ //
+ // Buffer now contains room enough to store EFI_FILE_INFO structure.
+ // Now, fill it in with all necessary information about the file.
+ //
+ FileInfo = (EFI_FILE_INFO *)Buffer;
+ FileInfo->Size = FileInfoLength;
+ FileInfo->Attribute &= ~EFI_FILE_VALID_ATTR;
+ FileInfo->Attribute |= EFI_FILE_READ_ONLY;
+
+ if (IS_FID_DIRECTORY_FILE (File->FileIdentifierDesc)) {
+ FileInfo->Attribute |= EFI_FILE_DIRECTORY;
+ } else if (IS_FID_NORMAL_FILE (File->FileIdentifierDesc)) {
+ FileInfo->Attribute |= EFI_FILE_ARCHIVE;
+ }
+
+ if (IS_FID_HIDDEN_FILE (File->FileIdentifierDesc)) {
+ FileInfo->Attribute |= EFI_FILE_HIDDEN;
+ }
+
+ if (IS_FE (File->FileEntry)) {
+ FileEntry = (UDF_FILE_ENTRY *)File->FileEntry;
+
+ //
+ // Check if FE has the system attribute set.
+ //
+ if (FileEntry->IcbTag.Flags & (1 << 10)) {
+ FileInfo->Attribute |= EFI_FILE_SYSTEM;
+ }
+
+ FileInfo->FileSize = FileSize;
+ FileInfo->PhysicalSize = FileSize;
+
+ FileInfo->CreateTime.Year = FileEntry->AccessTime.Year;
+ FileInfo->CreateTime.Month = FileEntry->AccessTime.Month;
+ FileInfo->CreateTime.Day = FileEntry->AccessTime.Day;
+ FileInfo->CreateTime.Hour = FileEntry->AccessTime.Hour;
+ FileInfo->CreateTime.Minute = FileEntry->AccessTime.Second;
+ FileInfo->CreateTime.Second = FileEntry->AccessTime.Second;
+ FileInfo->CreateTime.Nanosecond =
+ FileEntry->AccessTime.HundredsOfMicroseconds;
+
+ FileInfo->LastAccessTime.Year =
+ FileEntry->AccessTime.Year;
+ FileInfo->LastAccessTime.Month =
+ FileEntry->AccessTime.Month;
+ FileInfo->LastAccessTime.Day =
+ FileEntry->AccessTime.Day;
+ FileInfo->LastAccessTime.Hour =
+ FileEntry->AccessTime.Hour;
+ FileInfo->LastAccessTime.Minute =
+ FileEntry->AccessTime.Minute;
+ FileInfo->LastAccessTime.Second =
+ FileEntry->AccessTime.Second;
+ FileInfo->LastAccessTime.Nanosecond =
+ FileEntry->AccessTime.HundredsOfMicroseconds;
+ } else if (IS_EFE (File->FileEntry)) {
+ ExtendedFileEntry = (UDF_EXTENDED_FILE_ENTRY *)File->FileEntry;
+
+ //
+ // Check if EFE has the system attribute set.
+ //
+ if (ExtendedFileEntry->IcbTag.Flags & (1 << 10)) {
+ FileInfo->Attribute |= EFI_FILE_SYSTEM;
+ }
+
+ FileInfo->FileSize = FileSize;
+ FileInfo->PhysicalSize = FileSize;
+
+ FileInfo->CreateTime.Year = ExtendedFileEntry->CreationTime.Year;
+ FileInfo->CreateTime.Month = ExtendedFileEntry->CreationTime.Month;
+ FileInfo->CreateTime.Day = ExtendedFileEntry->CreationTime.Day;
+ FileInfo->CreateTime.Hour = ExtendedFileEntry->CreationTime.Hour;
+ FileInfo->CreateTime.Minute = ExtendedFileEntry->CreationTime.Second;
+ FileInfo->CreateTime.Second = ExtendedFileEntry->CreationTime.Second;
+ FileInfo->CreateTime.Nanosecond =
+ ExtendedFileEntry->AccessTime.HundredsOfMicroseconds;
+
+ FileInfo->LastAccessTime.Year =
+ ExtendedFileEntry->AccessTime.Year;
+ FileInfo->LastAccessTime.Month =
+ ExtendedFileEntry->AccessTime.Month;
+ FileInfo->LastAccessTime.Day =
+ ExtendedFileEntry->AccessTime.Day;
+ FileInfo->LastAccessTime.Hour =
+ ExtendedFileEntry->AccessTime.Hour;
+ FileInfo->LastAccessTime.Minute =
+ ExtendedFileEntry->AccessTime.Minute;
+ FileInfo->LastAccessTime.Second =
+ ExtendedFileEntry->AccessTime.Second;
+ FileInfo->LastAccessTime.Nanosecond =
+ ExtendedFileEntry->AccessTime.HundredsOfMicroseconds;
+ }
+
+ FileInfo->CreateTime.TimeZone = EFI_UNSPECIFIED_TIMEZONE;
+ FileInfo->CreateTime.Daylight = EFI_TIME_ADJUST_DAYLIGHT;
+ FileInfo->LastAccessTime.TimeZone = EFI_UNSPECIFIED_TIMEZONE;
+ FileInfo->LastAccessTime.Daylight = EFI_TIME_ADJUST_DAYLIGHT;
+
+ CopyMem ((VOID *)&FileInfo->ModificationTime,
+ (VOID *)&FileInfo->LastAccessTime,
+ sizeof (EFI_TIME));
+
+ if (FileName != NULL) {
+ StrCpyS (FileInfo->FileName, StrLen (FileName) + 1, FileName);
+ } else {
+ FileInfo->FileName[0] = '\0';
+ }
+
+ *BufferSize = FileInfoLength;
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Get volume and free space size information of an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[out] VolumeSize Volume size.
+ @param[out] FreeSpaceSize Free space size.
+
+ @retval EFI_SUCCESS Volume and free space size calculated.
+ @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_OUT_OF_RESOURCES The volume and free space size were not
+ calculated due to lack of resources.
+
+**/
+EFI_STATUS
+GetVolumeSize (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ OUT UINT64 *VolumeSize,
+ OUT UINT64 *FreeSpaceSize
+ )
+{
+ UDF_EXTENT_AD ExtentAd;
+ UINT32 LogicalBlockSize;
+ UINT64 Lsn;
+ EFI_STATUS Status;
+ UDF_LOGICAL_VOLUME_INTEGRITY *LogicalVolInt;
+ UINTN Index;
+ UINTN Length;
+ UINT32 LsnsNo;
+
+ *VolumeSize = 0;
+ *FreeSpaceSize = 0;
+
+ for (Index = 0; Index < Volume->LogicalVolDescsNo; Index++) {
+ CopyMem ((VOID *)&ExtentAd,
+ (VOID *)&Volume->LogicalVolDescs[Index]->IntegritySequenceExtent,
+ sizeof (UDF_EXTENT_AD));
+ if (ExtentAd.ExtentLength == 0) {
+ continue;
+ }
+
+ LogicalBlockSize = LV_BLOCK_SIZE (Volume, Index);
+
+ Read_Next_Sequence:
+ LogicalVolInt = (UDF_LOGICAL_VOLUME_INTEGRITY *)
+ AllocatePool (ExtentAd.ExtentLength);
+ if (LogicalVolInt == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ Lsn = (UINT64)ExtentAd.ExtentLocation;
+
+ Status = DiskIo->ReadDisk (
+ DiskIo,
+ BlockIo->Media->MediaId,
+ MultU64x32 (Lsn, LogicalBlockSize),
+ ExtentAd.ExtentLength,
+ (VOID *)LogicalVolInt
+ );
+ if (EFI_ERROR (Status)) {
+ FreePool ((VOID *)LogicalVolInt);
+ return Status;
+ }
+
+ if (!IS_LVID (LogicalVolInt)) {
+ FreePool ((VOID *)LogicalVolInt);
+ return EFI_VOLUME_CORRUPTED;
+ }
+
+ Length = LogicalVolInt->NumberOfPartitions;
+ for (Index = 0; Index < Length; Index += sizeof (UINT32)) {
+ LsnsNo = *(UINT32 *)((UINT8 *)LogicalVolInt->Data + Index);
+ if (LsnsNo == 0xFFFFFFFFUL) {
+ //
+ // Size not specified.
+ //
+ continue;
+ }
+
+ *FreeSpaceSize += MultU64x32 ((UINT64)LsnsNo, LogicalBlockSize);
+ }
+
+ Length = (LogicalVolInt->NumberOfPartitions * sizeof (UINT32)) << 1;
+ for (; Index < Length; Index += sizeof (UINT32)) {
+ LsnsNo = *(UINT32 *)((UINT8 *)LogicalVolInt->Data + Index);
+ if (LsnsNo == 0xFFFFFFFFUL) {
+ //
+ // Size not specified.
+ //
+ continue;
+ }
+
+ *VolumeSize += MultU64x32 ((UINT64)LsnsNo, LogicalBlockSize);
+ }
+
+ CopyMem ((VOID *)&ExtentAd,(VOID *)&LogicalVolInt->NextIntegrityExtent,
+ sizeof (UDF_EXTENT_AD));
+ if (ExtentAd.ExtentLength > 0) {
+ FreePool ((VOID *)LogicalVolInt);
+ goto Read_Next_Sequence;
+ }
+
+ FreePool ((VOID *)LogicalVolInt);
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Seek a file and read its data into memory on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] File File information structure.
+ @param[in] FileSize Size of the file.
+ @param[in out] FilePosition File position.
+ @param[in out] Buffer File data.
+ @param[in out] BufferSize Read size.
+
+ @retval EFI_SUCCESS File seeked and read.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The file's recorded data was not read due to lack
+ of resources.
+
+**/
+EFI_STATUS
+ReadFileData (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_FILE_INFO *File,
+ IN UINT64 FileSize,
+ IN OUT UINT64 *FilePosition,
+ IN OUT VOID *Buffer,
+ IN OUT UINT64 *BufferSize
+ )
+{
+ EFI_STATUS Status;
+ UDF_READ_FILE_INFO ReadFileInfo;
+
+ ReadFileInfo.Flags = READ_FILE_SEEK_AND_READ;
+ ReadFileInfo.FilePosition = *FilePosition;
+ ReadFileInfo.FileData = Buffer;
+ ReadFileInfo.FileDataSize = *BufferSize;
+ ReadFileInfo.FileSize = FileSize;
+
+ Status = ReadFile (
+ BlockIo,
+ DiskIo,
+ Volume,
+ &File->FileIdentifierDesc->Icb,
+ File->FileEntry,
+ &ReadFileInfo
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ *BufferSize = ReadFileInfo.FileDataSize;
+ *FilePosition = ReadFileInfo.FilePosition;
+
+ return EFI_SUCCESS;
+}
+
+/**
+ Check if ControllerHandle supports an UDF file system.
+
+ @param[in] This Protocol instance pointer.
+ @param[in] ControllerHandle Handle of device to test.
+
+ @retval EFI_SUCCESS UDF file system found.
+ @retval EFI_UNSUPPORTED UDF file system not found.
+
+**/
+EFI_STATUS
+SupportUdfFileSystem (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle
+ )
+{
+ EFI_STATUS Status;
+ EFI_DEVICE_PATH_PROTOCOL *DevicePath;
+ EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;
+ EFI_DEVICE_PATH_PROTOCOL *LastDevicePathNode;
+ EFI_GUID *VendorDefinedGuid;
+ EFI_GUID UdfDevPathGuid = EFI_UDF_DEVICE_PATH_GUID;
+
+ //
+ // Open Device Path protocol on ControllerHandle
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDevicePathProtocolGuid,
+ (VOID **)&DevicePath,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (EFI_ERROR (Status)) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Status = EFI_UNSUPPORTED;
+
+ //
+ // Get last Device Path node
+ //
+ LastDevicePathNode = NULL;
+ DevicePathNode = DevicePath;
+ while (!IsDevicePathEnd (DevicePathNode)) {
+ LastDevicePathNode = DevicePathNode;
+ DevicePathNode = NextDevicePathNode (DevicePathNode);
+ }
+ //
+ // Check if last Device Path node contains a Vendor-Defined Media Device Path
+ // of an UDF file system.
+ //
+ if (LastDevicePathNode != NULL &&
+ DevicePathType (LastDevicePathNode) == MEDIA_DEVICE_PATH &&
+ DevicePathSubType (LastDevicePathNode) == MEDIA_VENDOR_DP) {
+ VendorDefinedGuid = (EFI_GUID *)((UINTN)LastDevicePathNode +
+ OFFSET_OF (VENDOR_DEVICE_PATH, Guid));
+ if (CompareGuid (VendorDefinedGuid, &UdfDevPathGuid)) {
+ Status = EFI_SUCCESS;
+ }
+ }
+
+ //
+ // Close Device Path protocol on ControllerHandle
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiDevicePathProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+
+ return Status;
+}
diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/Udf.c b/MdeModulePkg/Universal/Disk/UdfDxe/Udf.c
new file mode 100644
index 0000000000..9f10c78ca9
--- /dev/null
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/Udf.c
@@ -0,0 +1,344 @@
+/** @file
+ UDF/ECMA-167 file system driver.
+
+ Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
+
+ 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"
+
+//
+// UDF filesystem driver's Global Variables.
+//
+EFI_DRIVER_BINDING_PROTOCOL gUdfDriverBinding = {
+ UdfDriverBindingSupported,
+ UdfDriverBindingStart,
+ UdfDriverBindingStop,
+ 0x10,
+ NULL,
+ NULL
+};
+
+EFI_SIMPLE_FILE_SYSTEM_PROTOCOL gUdfSimpleFsTemplate = {
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,
+ UdfOpenVolume
+};
+
+/**
+ Test to see if this driver supports ControllerHandle. Any ControllerHandle
+ than contains a BlockIo and DiskIo protocol or a BlockIo2 protocol can be
+ supported.
+
+ @param[in] This Protocol instance pointer.
+ @param[in] ControllerHandle Handle of device to test.
+ @param[in] RemainingDevicePath Optional parameter use to pick a specific
+ child device to start.
+
+ @retval EFI_SUCCESS This driver supports this device.
+ @retval EFI_ALREADY_STARTED This driver is already running on this device.
+ @retval other This driver does not support this device.
+
+**/
+EFI_STATUS
+EFIAPI
+UdfDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+{
+ EFI_STATUS Status;
+ EFI_DISK_IO_PROTOCOL *DiskIo;
+
+ //
+ // Open DiskIo protocol on ControllerHandle
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ (VOID **)&DiskIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Close DiskIo protocol on ControllerHandle
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+
+ //
+ // Test whether ControllerHandle supports BlockIo protocol
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ NULL,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_TEST_PROTOCOL
+ );
+
+ return Status;
+}
+
+/**
+ Start this driver on ControllerHandle by opening a Block IO or a Block IO2
+ or both, and Disk IO protocol, reading Device Path, and creating a child
+ handle with a Disk IO and device path protocol.
+
+ @param[in] This Protocol instance pointer.
+ @param[in] ControllerHandle Handle of device to bind driver to
+ @param[in] RemainingDevicePath Optional parameter use to pick a specific
+ child device to start.
+
+ @retval EFI_SUCCESS This driver is added to ControllerHandle.
+ @retval EFI_ALREADY_STARTED This driver is already running on
+ ControllerHandle.
+ @retval other This driver does not support this device.
+
+**/
+EFI_STATUS
+EFIAPI
+UdfDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ )
+{
+ EFI_TPL OldTpl;
+ EFI_STATUS Status;
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+ EFI_DISK_IO_PROTOCOL *DiskIo;
+ PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
+
+ OldTpl = gBS->RaiseTPL (TPL_CALLBACK);
+
+ //
+ // Open BlockIo protocol on ControllerHandle
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ (VOID **)&BlockIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Open DiskIo protocol on ControllerHandle
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ (VOID **)&DiskIo,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_BY_DRIVER
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Check if ControllerHandle supports an UDF file system
+ //
+ Status = SupportUdfFileSystem (This, ControllerHandle);
+ if (EFI_ERROR (Status)) {
+ goto Exit;
+ }
+
+ //
+ // Initialize private file system structure
+ //
+ PrivFsData =
+ (PRIVATE_UDF_SIMPLE_FS_DATA *)
+ AllocateZeroPool (sizeof (PRIVATE_UDF_SIMPLE_FS_DATA));
+ if (PrivFsData == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Exit;
+ }
+
+ //
+ // Create new child handle
+ //
+ PrivFsData->Signature = PRIVATE_UDF_SIMPLE_FS_DATA_SIGNATURE;
+ PrivFsData->BlockIo = BlockIo;
+ PrivFsData->DiskIo = DiskIo;
+ PrivFsData->Handle = ControllerHandle;
+
+ //
+ // Set up SimpleFs protocol
+ //
+ CopyMem ((VOID *)&PrivFsData->SimpleFs, (VOID *)&gUdfSimpleFsTemplate,
+ sizeof (EFI_SIMPLE_FILE_SYSTEM_PROTOCOL));
+
+ //
+ // Install child handle
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &PrivFsData->Handle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ &PrivFsData->SimpleFs,
+ NULL
+ );
+
+Exit:
+ if (EFI_ERROR (Status)) {
+ //
+ // Close DiskIo protocol on ControllerHandle
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ //
+ // Close BlockIo protocol on ControllerHandle
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ }
+
+ gBS->RestoreTPL (OldTpl);
+
+ return Status;
+}
+
+/**
+ Stop this driver on ControllerHandle. Support stopping any child handles
+ created by this driver.
+
+ @param This Protocol instance pointer.
+ @param ControllerHandle Handle of device to stop driver on
+ @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
+ children is zero stop the entire bus driver.
+ @param ChildHandleBuffer List of Child Handles to Stop.
+
+ @retval EFI_SUCCESS This driver is removed ControllerHandle
+ @retval other This driver was not removed from this device
+
+**/
+EFI_STATUS
+EFIAPI
+UdfDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ )
+{
+ PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;
+ EFI_STATUS Status;
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFs;
+
+ //
+ // Open SimpleFs protocol on ControllerHandle
+ //
+ Status = gBS->OpenProtocol (
+ ControllerHandle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ (VOID **)&SimpleFs,
+ This->DriverBindingHandle,
+ ControllerHandle,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if (!EFI_ERROR (Status)) {
+ PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (This);
+
+ //
+ // Uninstall child handle
+ //
+ Status = gBS->UninstallMultipleProtocolInterfaces (
+ PrivFsData->Handle,
+ &gEfiSimpleFileSystemProtocolGuid,
+ &PrivFsData->SimpleFs,
+ NULL
+ );
+
+ //
+ // Check if there's any open file. If so, clean them up.
+ //
+ if (PrivFsData->OpenFiles > 0) {
+ CleanupVolumeInformation (&PrivFsData->Volume);
+ }
+
+ FreePool ((VOID *)PrivFsData);
+ }
+
+ if (!EFI_ERROR (Status)) {
+ //
+ // Close DiskIo protocol on ControllerHandle
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiDiskIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ //
+ // Close BlockIo protocol on ControllerHandle
+ //
+ gBS->CloseProtocol (
+ ControllerHandle,
+ &gEfiBlockIoProtocolGuid,
+ This->DriverBindingHandle,
+ ControllerHandle
+ );
+ }
+
+ return Status;
+}
+
+/**
+ The user Entry Point for UDF file system driver. The user code starts with
+ this function.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The entry point is executed successfully.
+ @retval other Some error occurs when executing this entry point.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializeUdf (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = EfiLibInstallDriverBindingComponentName2 (
+ ImageHandle,
+ SystemTable,
+ &gUdfDriverBinding,
+ ImageHandle,
+ &gUdfComponentName,
+ &gUdfComponentName2
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/Udf.h b/MdeModulePkg/Universal/Disk/UdfDxe/Udf.h
new file mode 100644
index 0000000000..240d420ff5
--- /dev/null
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/Udf.h
@@ -0,0 +1,1244 @@
+/** @file
+ UDF/ECMA-167 file system driver.
+
+ Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
+
+ 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.
+**/
+
+#ifndef _UDF_H_
+#define _UDF_H_
+
+#include <Uefi.h>
+#include <Base.h>
+
+#include <Protocol/BlockIo.h>
+#include <Protocol/ComponentName.h>
+#include <Protocol/DevicePath.h>
+#include <Protocol/DriverBinding.h>
+#include <Protocol/DiskIo.h>
+#include <Protocol/SimpleFileSystem.h>
+
+#include <Guid/FileInfo.h>
+#include <Guid/FileSystemInfo.h>
+#include <Guid/FileSystemVolumeLabelInfo.h>
+
+#include <Library/DebugLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/BaseLib.h>
+#include <Library/UefiLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DevicePathLib.h>
+
+#include <IndustryStandard/ElTorito.h>
+#include <IndustryStandard/Udf.h>
+
+//
+// C5BD4D42-1A76-4996-8956-73CDA326CD0A
+//
+#define EFI_UDF_DEVICE_PATH_GUID \
+ { 0xC5BD4D42, 0x1A76, 0x4996, \
+ { 0x89, 0x56, 0x73, 0xCD, 0xA3, 0x26, 0xCD, 0x0A } \
+ }
+
+#define UDF_DEFAULT_LV_NUM 0
+
+#define IS_PVD(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 1))
+#define IS_PD(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 5))
+#define IS_LVD(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 6))
+#define IS_TD(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 8))
+#define IS_FSD(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 256))
+#define IS_FE(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 261))
+#define IS_EFE(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 266))
+#define IS_FID(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 257))
+#define IS_AED(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 258))
+#define IS_LVID(_Pointer) \
+ ((BOOLEAN)(_GET_TAG_ID (_Pointer) == 9))
+
+#define _GET_FILETYPE(_Pointer) \
+ (IS_FE (_Pointer) ? \
+ (((UDF_FILE_ENTRY *)(_Pointer))->IcbTag.FileType) \
+ : \
+ (((UDF_EXTENDED_FILE_ENTRY *)(_Pointer))->IcbTag.FileType))
+
+#define IS_FE_DIRECTORY(_Pointer) \
+ ((BOOLEAN)(_GET_FILETYPE (_Pointer) == 4))
+#define IS_FE_STANDARD_FILE(_Pointer) \
+ ((BOOLEAN)(_GET_FILETYPE (_Pointer) == 5))
+#define IS_FE_SYMLINK(_Pointer) \
+ ((BOOLEAN)(_GET_FILETYPE (_Pointer) == 12))
+
+#define HIDDEN_FILE (1 << 0)
+#define DIRECTORY_FILE (1 << 1)
+#define DELETED_FILE (1 << 2)
+#define PARENT_FILE (1 << 3)
+
+#define _GET_FILE_CHARS(_Pointer) \
+ (((UDF_FILE_IDENTIFIER_DESCRIPTOR *)(_Pointer))->FileCharacteristics)
+
+#define IS_FID_HIDDEN_FILE(_Pointer) \
+ ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & HIDDEN_FILE))
+#define IS_FID_DIRECTORY_FILE(_Pointer) \
+ ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & DIRECTORY_FILE))
+#define IS_FID_DELETED_FILE(_Pointer) \
+ ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & DELETED_FILE))
+#define IS_FID_PARENT_FILE(_Pointer) \
+ ((BOOLEAN)(_GET_FILE_CHARS (_Pointer) & PARENT_FILE))
+#define IS_FID_NORMAL_FILE(_Pointer) \
+ ((BOOLEAN)(!IS_FID_DIRECTORY_FILE (_Pointer) && \
+ !IS_FID_PARENT_FILE (_Pointer)))
+
+typedef enum {
+ SHORT_ADS_SEQUENCE,
+ LONG_ADS_SEQUENCE,
+ EXTENDED_ADS_SEQUENCE,
+ INLINE_DATA
+} UDF_FE_RECORDING_FLAGS;
+
+#define GET_FE_RECORDING_FLAGS(_Fe) \
+ ((UDF_FE_RECORDING_FLAGS)((UDF_ICB_TAG *)( \
+ (UINT8 *)(_Fe) + \
+ sizeof (UDF_DESCRIPTOR_TAG)))->Flags & 0x07)
+
+typedef enum {
+ EXTENT_RECORDED_AND_ALLOCATED,
+ EXTENT_NOT_RECORDED_BUT_ALLOCATED,
+ EXTENT_NOT_RECORDED_NOT_ALLOCATED,
+ EXTENT_IS_NEXT_EXTENT,
+} UDF_EXTENT_FLAGS;
+
+#define AD_LENGTH(_RecFlags) \
+ ((_RecFlags) == SHORT_ADS_SEQUENCE ? \
+ ((UINT64)(sizeof (UDF_SHORT_ALLOCATION_DESCRIPTOR))) : \
+ ((UINT64)(sizeof (UDF_LONG_ALLOCATION_DESCRIPTOR))))
+
+#define GET_EXTENT_FLAGS(_RecFlags, _Ad) \
+ ((_RecFlags) == SHORT_ADS_SEQUENCE ? \
+ ((UDF_EXTENT_FLAGS)((((UDF_SHORT_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength >> \
+ 30) & 0x3)) : \
+ ((UDF_EXTENT_FLAGS)((((UDF_LONG_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength >> \
+ 30) & 0x3)))
+
+#define GET_EXTENT_LENGTH(_RecFlags, _Ad) \
+ ((_RecFlags) == SHORT_ADS_SEQUENCE ? \
+ ((UINT32)((((UDF_SHORT_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength & \
+ ~0xC0000000UL))) : \
+ ((UINT32)((((UDF_LONG_ALLOCATION_DESCRIPTOR *)(_Ad))->ExtentLength & \
+ ~0xC0000000UL))))
+
+#define UDF_FILENAME_LENGTH 128
+#define UDF_PATH_LENGTH 512
+
+#define GET_FID_FROM_ADS(_Data, _Offs) \
+ ((UDF_FILE_IDENTIFIER_DESCRIPTOR *)((UINT8 *)(_Data) + (_Offs)))
+
+#define IS_VALID_COMPRESSION_ID(_CompId) \
+ ((BOOLEAN)((_CompId) == 8 || (_CompId) == 16))
+
+#define LV_BLOCK_SIZE(_Vol, _LvNum) \
+ (_Vol)->LogicalVolDescs[(_LvNum)]->LogicalBlockSize
+
+#define UDF_STANDARD_IDENTIFIER_LENGTH 5
+
+#define LV_UDF_REVISION(_Lv) \
+ *(UINT16 *)(UINTN)(_Lv)->DomainIdentifier.IdentifierSuffix
+
+#pragma pack(1)
+
+typedef struct {
+ UINT8 StandardIdentifier[UDF_STANDARD_IDENTIFIER_LENGTH];
+} UDF_STANDARD_IDENTIFIER;
+
+#pragma pack()
+
+typedef enum {
+ READ_FILE_GET_FILESIZE,
+ READ_FILE_ALLOCATE_AND_READ,
+ READ_FILE_SEEK_AND_READ,
+} UDF_READ_FILE_FLAGS;
+
+typedef struct {
+ VOID *FileData;
+ UDF_READ_FILE_FLAGS Flags;
+ UINT64 FileDataSize;
+ UINT64 FilePosition;
+ UINT64 FileSize;
+ UINT64 ReadLength;
+} UDF_READ_FILE_INFO;
+
+#pragma pack(1)
+
+typedef struct {
+ UINT8 CharacterSetType;
+ UINT8 CharacterSetInfo[63];
+} UDF_CHAR_SPEC;
+
+typedef struct {
+ UINT8 Flags;
+ UINT8 Identifier[23];
+ UINT8 IdentifierSuffix[8];
+} UDF_ENTITY_ID;
+
+typedef struct {
+ UINT16 TypeAndTimezone;
+ INT16 Year;
+ UINT8 Month;
+ UINT8 Day;
+ UINT8 Hour;
+ UINT8 Minute;
+ UINT8 Second;
+ UINT8 Centiseconds;
+ UINT8 HundredsOfMicroseconds;
+ UINT8 Microseconds;
+} UDF_TIMESTAMP;
+
+typedef struct {
+ UINT32 LogicalBlockNumber;
+ UINT16 PartitionReferenceNumber;
+} UDF_LB_ADDR;
+
+typedef struct {
+ UINT32 ExtentLength;
+ UDF_LB_ADDR ExtentLocation;
+ UINT8 ImplementationUse[6];
+} UDF_LONG_ALLOCATION_DESCRIPTOR;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UINT32 PrevAllocationExtentDescriptor;
+ UINT32 LengthOfAllocationDescriptors;
+} UDF_ALLOCATION_EXTENT_DESCRIPTOR;
+
+typedef struct {
+ UINT8 StructureType;
+ UINT8 StandardIdentifier[UDF_STANDARD_IDENTIFIER_LENGTH];
+ UINT8 StructureVersion;
+ UINT8 Reserved;
+ UINT8 StructureData[2040];
+} UDF_VOLUME_DESCRIPTOR;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UINT32 VolumeDescriptorSequenceNumber;
+ UINT16 PartitionFlags;
+ UINT16 PartitionNumber;
+ UDF_ENTITY_ID PartitionContents;
+ UINT8 PartitionContentsUse[128];
+ UINT32 AccessType;
+ UINT32 PartitionStartingLocation;
+ UINT32 PartitionLength;
+ UDF_ENTITY_ID ImplementationIdentifier;
+ UINT8 ImplementationUse[128];
+ UINT8 Reserved[156];
+} UDF_PARTITION_DESCRIPTOR;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UINT32 VolumeDescriptorSequenceNumber;
+ UDF_CHAR_SPEC DescriptorCharacterSet;
+ UINT8 LogicalVolumeIdentifier[128];
+ UINT32 LogicalBlockSize;
+ UDF_ENTITY_ID DomainIdentifier;
+ UDF_LONG_ALLOCATION_DESCRIPTOR LogicalVolumeContentsUse;
+ UINT32 MapTableLength;
+ UINT32 NumberOfPartitionMaps;
+ UDF_ENTITY_ID ImplementationIdentifier;
+ UINT8 ImplementationUse[128];
+ UDF_EXTENT_AD IntegritySequenceExtent;
+ UINT8 PartitionMaps[6];
+} UDF_LOGICAL_VOLUME_DESCRIPTOR;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UDF_TIMESTAMP RecordingDateTime;
+ UINT32 IntegrityType;
+ UDF_EXTENT_AD NextIntegrityExtent;
+ UINT8 LogicalVolumeContentsUse[32];
+ UINT32 NumberOfPartitions;
+ UINT32 LengthOfImplementationUse;
+ UINT8 Data[0];
+} UDF_LOGICAL_VOLUME_INTEGRITY;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UDF_TIMESTAMP RecordingDateAndTime;
+ UINT16 InterchangeLevel;
+ UINT16 MaximumInterchangeLevel;
+ UINT32 CharacterSetList;
+ UINT32 MaximumCharacterSetList;
+ UINT32 FileSetNumber;
+ UINT32 FileSetDescriptorNumber;
+ UDF_CHAR_SPEC LogicalVolumeIdentifierCharacterSet;
+ UINT8 LogicalVolumeIdentifier[128];
+ UDF_CHAR_SPEC FileSetCharacterSet;
+ UINT8 FileSetIdentifier[32];
+ UINT8 CopyrightFileIdentifier[32];
+ UINT8 AbstractFileIdentifier[32];
+ UDF_LONG_ALLOCATION_DESCRIPTOR RootDirectoryIcb;
+ UDF_ENTITY_ID DomainIdentifier;
+ UDF_LONG_ALLOCATION_DESCRIPTOR NextExtent;
+ UDF_LONG_ALLOCATION_DESCRIPTOR SystemStreamDirectoryIcb;
+ UINT8 Reserved[32];
+} UDF_FILE_SET_DESCRIPTOR;
+
+typedef struct {
+ UINT32 ExtentLength;
+ UINT32 ExtentPosition;
+} UDF_SHORT_ALLOCATION_DESCRIPTOR;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UINT16 FileVersionNumber;
+ UINT8 FileCharacteristics;
+ UINT8 LengthOfFileIdentifier;
+ UDF_LONG_ALLOCATION_DESCRIPTOR Icb;
+ UINT16 LengthOfImplementationUse;
+ UINT8 Data[0];
+} UDF_FILE_IDENTIFIER_DESCRIPTOR;
+
+typedef struct {
+ UINT32 PriorRecordNumberOfDirectEntries;
+ UINT16 StrategyType;
+ UINT16 StrategyParameter;
+ UINT16 MaximumNumberOfEntries;
+ UINT8 Reserved;
+ UINT8 FileType;
+ UDF_LB_ADDR ParentIcbLocation;
+ UINT16 Flags;
+} UDF_ICB_TAG;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UDF_ICB_TAG IcbTag;
+ UINT32 Uid;
+ UINT32 Gid;
+ UINT32 Permissions;
+ UINT16 FileLinkCount;
+ UINT8 RecordFormat;
+ UINT8 RecordDisplayAttributes;
+ UINT32 RecordLength;
+ UINT64 InformationLength;
+ UINT64 LogicalBlocksRecorded;
+ UDF_TIMESTAMP AccessTime;
+ UDF_TIMESTAMP ModificationTime;
+ UDF_TIMESTAMP AttributeTime;
+ UINT32 CheckPoint;
+ UDF_LONG_ALLOCATION_DESCRIPTOR ExtendedAttributeIcb;
+ UDF_ENTITY_ID ImplementationIdentifier;
+ UINT64 UniqueId;
+ UINT32 LengthOfExtendedAttributes;
+ UINT32 LengthOfAllocationDescriptors;
+ UINT8 Data[0]; // L_EA + L_AD
+} UDF_FILE_ENTRY;
+
+typedef struct {
+ UDF_DESCRIPTOR_TAG DescriptorTag;
+ UDF_ICB_TAG IcbTag;
+ UINT32 Uid;
+ UINT32 Gid;
+ UINT32 Permissions;
+ UINT16 FileLinkCount;
+ UINT8 RecordFormat;
+ UINT8 RecordDisplayAttributes;
+ UINT32 RecordLength;
+ UINT64 InformationLength;
+ UINT64 ObjectSize;
+ UINT64 LogicalBlocksRecorded;
+ UDF_TIMESTAMP AccessTime;
+ UDF_TIMESTAMP ModificationTime;
+ UDF_TIMESTAMP CreationTime;
+ UDF_TIMESTAMP AttributeTime;
+ UINT32 CheckPoint;
+ UINT32 Reserved;
+ UDF_LONG_ALLOCATION_DESCRIPTOR ExtendedAttributeIcb;
+ UDF_LONG_ALLOCATION_DESCRIPTOR StreamDirectoryIcb;
+ UDF_ENTITY_ID ImplementationIdentifier;
+ UINT64 UniqueId;
+ UINT32 LengthOfExtendedAttributes;
+ UINT32 LengthOfAllocationDescriptors;
+ UINT8 Data[0]; // L_EA + L_AD
+} UDF_EXTENDED_FILE_ENTRY;
+
+typedef struct {
+ UINT8 ComponentType;
+ UINT8 LengthOfComponentIdentifier;
+ UINT16 ComponentFileVersionNumber;
+ UINT8 ComponentIdentifier[0];
+} UDF_PATH_COMPONENT;
+
+#pragma pack()
+
+//
+// UDF filesystem driver's private data
+//
+typedef struct {
+ UDF_LOGICAL_VOLUME_DESCRIPTOR **LogicalVolDescs;
+ UINTN LogicalVolDescsNo;
+ UDF_PARTITION_DESCRIPTOR **PartitionDescs;
+ UINTN PartitionDescsNo;
+ UDF_FILE_SET_DESCRIPTOR **FileSetDescs;
+ UINTN FileSetDescsNo;
+ UINTN FileEntrySize;
+} UDF_VOLUME_INFO;
+
+typedef struct {
+ VOID *FileEntry;
+ UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc;
+} UDF_FILE_INFO;
+
+typedef struct {
+ VOID *DirectoryData;
+ UINT64 DirectoryLength;
+ UINT64 FidOffset;
+} UDF_READ_DIRECTORY_INFO;
+
+#define PRIVATE_UDF_FILE_DATA_SIGNATURE SIGNATURE_32 ('U', 'd', 'f', 'f')
+
+#define PRIVATE_UDF_FILE_DATA_FROM_THIS(a) \
+ CR ( \
+ a, \
+ PRIVATE_UDF_FILE_DATA, \
+ FileIo, \
+ PRIVATE_UDF_FILE_DATA_SIGNATURE \
+ )
+
+typedef struct {
+ UINTN Signature;
+ BOOLEAN IsRootDirectory;
+ UDF_FILE_INFO *Root;
+ UDF_FILE_INFO File;
+ UDF_READ_DIRECTORY_INFO ReadDirInfo;
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFs;
+ EFI_FILE_PROTOCOL FileIo;
+ CHAR16 AbsoluteFileName[UDF_PATH_LENGTH];
+ CHAR16 FileName[UDF_FILENAME_LENGTH];
+ UINT64 FileSize;
+ UINT64 FilePosition;
+} PRIVATE_UDF_FILE_DATA;
+
+#define PRIVATE_UDF_SIMPLE_FS_DATA_SIGNATURE SIGNATURE_32 ('U', 'd', 'f', 's')
+
+#define PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS(a) \
+ CR ( \
+ a, \
+ PRIVATE_UDF_SIMPLE_FS_DATA, \
+ SimpleFs, \
+ PRIVATE_UDF_SIMPLE_FS_DATA_SIGNATURE \
+ )
+
+typedef struct {
+ UINTN Signature;
+ EFI_BLOCK_IO_PROTOCOL *BlockIo;
+ EFI_DISK_IO_PROTOCOL *DiskIo;
+ EFI_SIMPLE_FILE_SYSTEM_PROTOCOL SimpleFs;
+ UDF_VOLUME_INFO Volume;
+ UDF_FILE_INFO Root;
+ UINTN OpenFiles;
+ EFI_HANDLE Handle;
+} PRIVATE_UDF_SIMPLE_FS_DATA;
+
+//
+// Global Variables
+//
+extern EFI_DRIVER_BINDING_PROTOCOL gUdfDriverBinding;
+extern EFI_COMPONENT_NAME_PROTOCOL gUdfComponentName;
+extern EFI_COMPONENT_NAME2_PROTOCOL gUdfComponentName2;
+
+//
+// Function Prototypes
+//
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ Set information about a file.
+
+ @param File 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
+ );
+
+/**
+ 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
+ );
+
+/**
+ Read volume information on a medium which contains a valid UDF file system.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[out] Volume UDF volume information structure.
+
+ @retval EFI_SUCCESS Volume information 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_OUT_OF_RESOURCES The volume was not read due to lack of resources.
+
+**/
+EFI_STATUS
+ReadUdfVolumeInformation (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ OUT UDF_VOLUME_INFO *Volume
+ );
+
+/**
+ Find the root directory on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[out] File Root directory file.
+
+ @retval EFI_SUCCESS Root directory found.
+ @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_OUT_OF_RESOURCES The root directory was not found due to lack of
+ resources.
+
+**/
+EFI_STATUS
+FindRootDirectory (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ OUT UDF_FILE_INFO *File
+ );
+
+/**
+ Find either a File Entry or a Extended File Entry from a given ICB.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] Icb ICB of the FID.
+ @param[out] FileEntry File Entry or Extended File Entry.
+
+ @retval EFI_SUCCESS File Entry or Extended File Entry found.
+ @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_OUT_OF_RESOURCES The FE/EFE entry was not found due to lack of
+ resources.
+
+**/
+EFI_STATUS
+FindFileEntry (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,
+ OUT VOID **FileEntry
+ );
+
+/**
+ Find a file given its absolute path on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] FilePath File's absolute path.
+ @param[in] Root Root directory file.
+ @param[in] Parent Parent directory file.
+ @param[out] File Found file.
+
+ @retval EFI_SUCCESS @p FilePath was found.
+ @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_OUT_OF_RESOURCES The @p FilePath file was not found due to lack of
+ resources.
+
+**/
+EFI_STATUS
+FindFile (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN CHAR16 *FilePath,
+ IN UDF_FILE_INFO *Root,
+ IN UDF_FILE_INFO *Parent,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,
+ OUT UDF_FILE_INFO *File
+ );
+
+/**
+ Read a directory entry at a time on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] ParentIcb ICB of the parent file.
+ @param[in] FileEntryData FE/EFE of the parent file.
+ @param[in out] ReadDirInfo Next read directory listing structure
+ information.
+ @param[out] FoundFid File Identifier Descriptor pointer.
+
+ @retval EFI_SUCCESS Directory entry read.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The directory entry was not read due to lack of
+ resources.
+
+**/
+EFI_STATUS
+ReadDirectoryEntry (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,
+ IN VOID *FileEntryData,
+ IN OUT UDF_READ_DIRECTORY_INFO *ReadDirInfo,
+ OUT UDF_FILE_IDENTIFIER_DESCRIPTOR **FoundFid
+ );
+
+/**
+ Get a filename (encoded in OSTA-compressed format) from a File Identifier
+ Descriptor on an UDF volume.
+
+ @param[in] FileIdentifierDesc File Identifier Descriptor pointer.
+ @param[out] FileName Decoded filename.
+
+ @retval EFI_SUCCESS Filename decoded and read.
+ @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
+**/
+EFI_STATUS
+GetFileNameFromFid (
+ IN UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc,
+ OUT CHAR16 *FileName
+ );
+
+/**
+ Resolve a symlink file on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] Parent Parent file.
+ @param[in] FileEntryData FE/EFE structure pointer.
+ @param[out] File Resolved file.
+
+ @retval EFI_SUCCESS Symlink file resolved.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The symlink file was not resolved due to lack of
+ resources.
+
+**/
+EFI_STATUS
+ResolveSymlink (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_FILE_INFO *Parent,
+ IN VOID *FileEntryData,
+ OUT UDF_FILE_INFO *File
+ );
+
+/**
+ Clean up in-memory UDF volume information.
+
+ @param[in] Volume Volume information pointer.
+
+**/
+VOID
+CleanupVolumeInformation (
+ IN UDF_VOLUME_INFO *Volume
+ );
+
+/**
+ Clean up in-memory UDF file information.
+
+ @param[in] File File information pointer.
+
+**/
+VOID
+CleanupFileInformation (
+ IN UDF_FILE_INFO *File
+ );
+
+/**
+ Find a file from its absolute path on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] File File information structure.
+ @param[out] Size Size of the file.
+
+ @retval EFI_SUCCESS File size calculated and set in @p Size.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The file size was not calculated due to lack of
+ resources.
+
+**/
+EFI_STATUS
+GetFileSize (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_FILE_INFO *File,
+ OUT UINT64 *Size
+ );
+
+/**
+ Set information about a file on an UDF volume.
+
+ @param[in] File File pointer.
+ @param[in] FileSize Size of the file.
+ @param[in] FileName Filename of the file.
+ @param[in out] BufferSize Size of the returned file infomation.
+ @param[out] Buffer Data of the returned file information.
+
+ @retval EFI_SUCCESS File information set.
+ @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_OUT_OF_RESOURCES The file information was not set due to lack of
+ resources.
+
+**/
+EFI_STATUS
+SetFileInfo (
+ IN UDF_FILE_INFO *File,
+ IN UINT64 FileSize,
+ IN CHAR16 *FileName,
+ IN OUT UINTN *BufferSize,
+ OUT VOID *Buffer
+ );
+
+/**
+ Get volume and free space size information of an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[out] VolumeSize Volume size.
+ @param[out] FreeSpaceSize Free space size.
+
+ @retval EFI_SUCCESS Volume and free space size calculated.
+ @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_OUT_OF_RESOURCES The volume and free space size were not
+ calculated due to lack of resources.
+
+**/
+EFI_STATUS
+GetVolumeSize (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ OUT UINT64 *VolumeSize,
+ OUT UINT64 *FreeSpaceSize
+ );
+
+/**
+ Seek a file and read its data into memory on an UDF volume.
+
+ @param[in] BlockIo BlockIo interface.
+ @param[in] DiskIo DiskIo interface.
+ @param[in] Volume UDF volume information structure.
+ @param[in] File File information structure.
+ @param[in] FileSize Size of the file.
+ @param[in out] FilePosition File position.
+ @param[in out] Buffer File data.
+ @param[in out] BufferSize Read size.
+
+ @retval EFI_SUCCESS File seeked and read.
+ @retval EFI_UNSUPPORTED Extended Allocation Descriptors 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_OUT_OF_RESOURCES The file's recorded data was not read due to lack
+ of resources.
+
+**/
+EFI_STATUS
+ReadFileData (
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN UDF_VOLUME_INFO *Volume,
+ IN UDF_FILE_INFO *File,
+ IN UINT64 FileSize,
+ IN OUT UINT64 *FilePosition,
+ IN OUT VOID *Buffer,
+ IN OUT UINT64 *BufferSize
+ );
+
+/**
+ Check if ControllerHandle supports an UDF file system.
+
+ @param[in] This Protocol instance pointer.
+ @param[in] ControllerHandle Handle of device to test.
+
+ @retval EFI_SUCCESS UDF file system found.
+ @retval EFI_UNSUPPORTED UDF file system not found.
+
+**/
+EFI_STATUS
+SupportUdfFileSystem (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle
+ );
+
+/**
+ Mangle a filename by cutting off trailing whitespaces, "\\", "." and "..".
+
+ @param[in] FileName Filename.
+
+ @retval @p FileName Filename mangled.
+
+**/
+CHAR16 *
+MangleFileName (
+ IN CHAR16 *FileName
+ );
+
+/**
+ Test to see if this driver supports ControllerHandle. Any ControllerHandle
+ than contains a BlockIo and DiskIo protocol can be supported.
+
+ @param This Protocol instance pointer.
+ @param ControllerHandle Handle of device to test
+ @param RemainingDevicePath Optional parameter use to pick a specific child
+ device to start.
+
+ @retval EFI_SUCCESS This driver supports this device
+ @retval EFI_ALREADY_STARTED This driver is already running on this device
+ @retval other This driver does not support this device
+
+**/
+EFI_STATUS
+EFIAPI
+UdfDriverBindingSupported (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+/**
+ Start this driver on ControllerHandle by opening a Block IO and Disk IO
+ protocol, reading Device Path, and creating a child handle with a
+ Disk IO and device path protocol.
+
+ @param This Protocol instance pointer.
+ @param ControllerHandle Handle of device to bind driver to
+ @param RemainingDevicePath Optional parameter use to pick a specific child
+ device to start.
+
+ @retval EFI_SUCCESS This driver is added to ControllerHandle
+ @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle
+ @retval other This driver does not support this device
+
+**/
+EFI_STATUS
+EFIAPI
+UdfDriverBindingStart (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
+ );
+
+/**
+ Stop this driver on ControllerHandle. Support stopping any child handles
+ created by this driver.
+
+ @param This Protocol instance pointer.
+ @param ControllerHandle Handle of device to stop driver on
+ @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of
+ children is zero stop the entire bus driver.
+ @param ChildHandleBuffer List of Child Handles to Stop.
+
+ @retval EFI_SUCCESS This driver is removed ControllerHandle
+ @retval other This driver was not removed from this device
+
+**/
+EFI_STATUS
+EFIAPI
+UdfDriverBindingStop (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN UINTN NumberOfChildren,
+ IN EFI_HANDLE *ChildHandleBuffer
+ );
+
+//
+// EFI Component Name Functions
+//
+/**
+ Retrieves a Unicode string that is the user readable name of the driver.
+
+ This function retrieves the user readable name of a driver in the form of a
+ Unicode string. If the driver specified by This has a user readable name in
+ the language specified by Language, then a pointer to the driver name is
+ returned in DriverName, and EFI_SUCCESS is returned. If the driver specified
+ by This does not support the language specified by Language,
+ then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param Language[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver name that the caller is
+ requesting, and it must match one of the
+ languages specified in SupportedLanguages. The
+ number of languages supported by a driver is up
+ to the driver writer. Language is specified
+ in RFC 4646 or ISO 639-2 language code format.
+
+ @param DriverName[out] A pointer to the Unicode string to return.
+ This Unicode string is the name of the
+ driver specified by This in the language
+ specified by Language.
+
+ @retval EFI_SUCCESS The Unicode string for the Driver specified by
+ This and the language specified by Language was
+ returned in DriverName.
+
+ @retval EFI_INVALID_PARAMETER Language is NULL.
+
+ @retval EFI_INVALID_PARAMETER DriverName is NULL.
+
+ @retval EFI_UNSUPPORTED The driver specified by This does not support
+ the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+UdfComponentNameGetDriverName (
+ IN EFI_COMPONENT_NAME_PROTOCOL *This,
+ IN CHAR8 *Language,
+ OUT CHAR16 **DriverName
+ );
+
+/**
+ Retrieves a Unicode string that is the user readable name of the controller
+ that is being managed by a driver.
+
+ This function retrieves the user readable name of the controller specified by
+ ControllerHandle and ChildHandle in the form of a Unicode string. If the
+ driver specified by This has a user readable name in the language specified by
+ Language, then a pointer to the controller name is returned in ControllerName,
+ and EFI_SUCCESS is returned. If the driver specified by This is not currently
+ managing the controller specified by ControllerHandle and ChildHandle,
+ then EFI_UNSUPPORTED is returned. If the driver specified by This does not
+ support the language specified by Language, then EFI_UNSUPPORTED is returned.
+
+ @param This[in] A pointer to the EFI_COMPONENT_NAME2_PROTOCOL or
+ EFI_COMPONENT_NAME_PROTOCOL instance.
+
+ @param ControllerHandle[in] The handle of a controller that the driver
+ specified by This is managing. This handle
+ specifies the controller whose name is to be
+ returned.
+
+ @param ChildHandle[in] The handle of the child controller to retrieve
+ the name of. This is an optional parameter that
+ may be NULL. It will be NULL for device
+ drivers. It will also be NULL for a bus drivers
+ that wish to retrieve the name of the bus
+ controller. It will not be NULL for a bus
+ driver that wishes to retrieve the name of a
+ child controller.
+
+ @param Language[in] A pointer to a Null-terminated ASCII string
+ array indicating the language. This is the
+ language of the driver name that the caller is
+ requesting, and it must match one of the
+ languages specified in SupportedLanguages. The
+ number of languages supported by a driver is up
+ to the driver writer. Language is specified in
+ RFC 4646 or ISO 639-2 language code format.
+
+ @param ControllerName[out] A pointer to the Unicode string to return.
+ This Unicode string is the name of the
+ controller specified by ControllerHandle and
+ ChildHandle in the language specified by
+ Language from the point of view of the driver
+ specified by This.
+
+ @retval EFI_SUCCESS The Unicode string for the user readable name in
+ the language specified by Language for the
+ driver specified by This was returned in
+ DriverName.
+
+ @retval EFI_INVALID_PARAMETER ControllerHandle is not a valid EFI_HANDLE.
+
+ @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid
+ EFI_HANDLE.
+
+ @retval EFI_INVALID_PARAMETER Language is NULL.
+
+ @retval EFI_INVALID_PARAMETER ControllerName is NULL.
+
+ @retval EFI_UNSUPPORTED The driver specified by This is not currently
+ managing the controller specified by
+ ControllerHandle and ChildHandle.
+
+ @retval EFI_UNSUPPORTED The driver specified by This does not support
+ the language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+UdfComponentNameGetControllerName (
+ IN EFI_COMPONENT_NAME_PROTOCOL *This,
+ IN EFI_HANDLE ControllerHandle,
+ IN EFI_HANDLE ChildHandle OPTIONAL,
+ IN CHAR8 *Language,
+ OUT CHAR16 **ControllerName
+ );
+
+#endif // _UDF_H_
diff --git a/MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf b/MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
new file mode 100644
index 0000000000..7fea6bd9dc
--- /dev/null
+++ b/MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
@@ -0,0 +1,66 @@
+## @file
+# UDF/ECMA-167 file system driver.
+#
+# Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>
+#
+# 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.
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = UdfDxe
+ FILE_GUID = 905f13b0-8f91-4b0a-bd76-e1e78f9422e4
+ MODULE_TYPE = UEFI_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = InitializeUdf
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+#
+# DRIVER_BINDING = gUdfDriverBinding
+# COMPONENT_NAME = gUdfComponentName
+# COMPONENT_NAME2 = gUdfComponentName2
+#
+
+[Sources]
+ ComponentName.c
+ FileSystemOperations.c
+ FileName.c
+ File.c
+ Udf.c
+ Udf.h
+
+
+[Packages]
+ MdePkg/MdePkg.dec
+
+
+[LibraryClasses]
+ DevicePathLib
+ UefiBootServicesTableLib
+ MemoryAllocationLib
+ BaseMemoryLib
+ UefiLib
+ BaseLib
+ UefiDriverEntryPoint
+ DebugLib
+
+
+[Guids]
+ gEfiFileInfoGuid ## SOMETIMES_CONSUMES ## Protocol
+ gEfiFileSystemInfoGuid ## SOMETIMES_CONSUMES ## Protocol
+
+
+[Protocols]
+ gEfiSimpleFileSystemProtocolGuid ## BY_START
+ gEfiDevicePathProtocolGuid ## BY_START
+ gEfiBlockIoProtocolGuid ## TO_START
+ gEfiDiskIoProtocolGuid ## TO_START
--
2.11.0
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