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MdeModulePkg/FvSimpleFileSystem: Add a new module to provide access to executable files in FVs. 

This module implements Simple FileSystem protocol over Firmware Volume (FV).
EFI Modules included into a FV can be listed and launched from the EFI Shell or any other EFI applications.

Contributed-under: TianoCore Contribution Agreement 1.0

Signed-off-by: Brendan Jackman <brendan.jackman@arm.com>
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16547 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Brendan Jackman 2014-12-23 03:18:04 +00:00 committed by erictian
parent 32d258b5e7
commit 9da91aea69
8 changed files with 2541 additions and 2 deletions
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6
MdeModulePkg/MdeModulePkg.dsc
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@ -336,8 +336,10 @@
<LibraryClasses>
NULL|MdeModulePkg/Library/PeiCrc32GuidedSectionExtractLib/PeiCrc32GuidedSectionExtractLib.inf
}
[Components.IA32, Components.X64, Components.IPF]
MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystemDxe.inf
[Components.IA32, Components.X64, Components.IPF]
MdeModulePkg/Universal/Network/UefiPxeBcDxe/UefiPxeBcDxe.inf
MdeModulePkg/Universal/DebugSupportDxe/DebugSupportDxe.inf
MdeModulePkg/Universal/EbcDxe/EbcDxe.inf

187
MdeModulePkg/Universal/FvSimpleFileSystemDxe/ComponentName.c Normal file
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/** @file
UEFI Component Name(2) protocol implementation for FvSimpleFileSystem driver.
Copyright (c) 2014, ARM Limited. All rights reserved.
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "FvSimpleFileSystemInternal.h"
//
// EFI Component Name Protocol
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME_PROTOCOL gFvSimpleFileSystemComponentName = {
FvSimpleFileSystemComponentNameGetDriverName,
FvSimpleFileSystemComponentNameGetControllerName,
"eng"
};
//
// EFI Component Name 2 Protocol
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME2_PROTOCOL gFvSimpleFileSystemComponentName2 = {
(EFI_COMPONENT_NAME2_GET_DRIVER_NAME) FvSimpleFileSystemComponentNameGetDriverName,
(EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME) FvSimpleFileSystemComponentNameGetControllerName,
"en"
};
//
// Driver name table for FvSimpleFileSystem module.
// It is shared by the implementation of ComponentName & ComponentName2 Protocol.
//
GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mFvSimpleFileSystemDriverNameTable[] = {
{
"eng;en",
(CHAR16 *)L"Fv Simple 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
FvSimpleFileSystemComponentNameGetDriverName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN CHAR8 *Language,
OUT CHAR16 **DriverName
)
{
return LookupUnicodeString2 (
Language,
This->SupportedLanguages,
mFvSimpleFileSystemDriverNameTable,
DriverName,
(BOOLEAN)(This == &gFvSimpleFileSystemComponentName)
);
}
/**
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
FvSimpleFileSystemComponentNameGetControllerName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName
)
{
return EFI_UNSUPPORTED;
}

978
MdeModulePkg/Universal/FvSimpleFileSystemDxe/FvSimpleFileSystem.c Normal file
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/** @file
This driver uses the EFI_FIRMWARE_VOLUME2_PROTOCOL to expose files in firmware
volumes via the the EFI_SIMPLE_FILESYSTEM_PROTOCOL and EFI_FILE_PROTOCOL.
It will expose a single directory, containing one file for each file in the firmware
volume. If a file has a UI section, its contents will be used as a filename.
Otherwise, a string representation of the GUID will be used.
Files of an executable type (That is PEIM, DRIVER, COMBINED_PEIM_DRIVER and APPLICATION)
will have ".efi" added to their filename.
Its primary intended use is to be able to start EFI applications embedded in FVs
from the UEFI shell. It is entirely read-only.
Copyright (c) 2014, ARM Limited. All rights reserved.
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "FvSimpleFileSystemInternal.h"
//
// Template for EFI_FILE_SYSTEM_INFO data structure.
//
EFI_FILE_SYSTEM_INFO mFsInfoTemplate = {
0, // Populate at runtime
TRUE, // Read-only
0, // Don't know volume size
0, // No free space
0, // Don't know block size
L"" // Populate at runtime
};
//
// Template for EFI_FILE_PROTOCOL data structure.
//
EFI_FILE_PROTOCOL mFileSystemTemplate = {
EFI_FILE_PROTOCOL_REVISION,
FvSimpleFileSystemOpen,
FvSimpleFileSystemClose,
FvSimpleFileSystemDelete,
FvSimpleFileSystemRead,
FvSimpleFileSystemWrite,
FvSimpleFileSystemGetPosition,
FvSimpleFileSystemSetPosition,
FvSimpleFileSystemGetInfo,
FvSimpleFileSystemSetInfo,
FvSimpleFileSystemFlush
};
/**
Find and call ReadSection on the first section found of an executable type.
@param FvProtocol A pointer to the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param FvFileInfo A pointer to the FV_FILESYSTEM_FILE_INFO instance that is a struct
representing a file's info.
@param BufferSize Pointer to a caller-allocated UINTN. It indicates the size of
the memory represented by *Buffer.
@param Buffer Pointer to a pointer to a data buffer to contain file content.
@retval EFI_SUCCESS The call completed successfully.
@retval EFI_WARN_BUFFER_TOO_SMALL The buffer is too small to contain the requested output.
@retval EFI_ACCESS_DENIED The firmware volume is configured to disallow reads.
@retval EFI_NOT_FOUND The requested file was not found in the firmware volume.
@retval EFI_DEVICE_ERROR A hardware error occurred when attempting toaccess the firmware volume.
**/
EFI_STATUS
FvFsFindExecutableSection (
IN EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol,
IN FV_FILESYSTEM_FILE_INFO *FvFileInfo,
IN OUT UINTN *BufferSize,
IN OUT VOID **Buffer
)
{
EFI_SECTION_TYPE SectionType;
UINT32 AuthenticationStatus;
EFI_STATUS Status;
for (SectionType = EFI_SECTION_PE32; SectionType <= EFI_SECTION_TE; SectionType++) {
Status = FvProtocol->ReadSection (
FvProtocol,
&FvFileInfo->NameGuid,
SectionType,
0,
Buffer,
BufferSize,
&AuthenticationStatus
);
if (Status != EFI_NOT_FOUND) {
return Status;
}
}
return EFI_NOT_FOUND;
}
/**
Get the size of the buffer that will be returned by FvFsReadFile.
@param FvProtocol A pointer to the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param FvFileInfo A pointer to the FV_FILESYSTEM_FILE_INFO instance that is a struct
representing a file's info.
@retval EFI_SUCCESS The file size was gotten correctly.
@retval Others The file size wasn't gotten correctly.
**/
EFI_STATUS
FvFsGetFileSize (
IN EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol,
IN OUT FV_FILESYSTEM_FILE_INFO *FvFileInfo
)
{
UINT32 AuthenticationStatus;
EFI_FV_FILETYPE FoundType;
EFI_FV_FILE_ATTRIBUTES Attributes;
EFI_STATUS Status;
UINT8 IgnoredByte;
VOID *IgnoredPtr;
//
// To get the size of a section, we pass 0 for BufferSize. But we can't pass
// NULL for Buffer, as that will cause a return of INVALID_PARAMETER, and we
// can't pass NULL for *Buffer, as that will cause the callee to allocate
// a buffer of the sections size.
//
IgnoredPtr = &IgnoredByte;
FvFileInfo->FileInfo.FileSize = 0;
if (FV_FILETYPE_IS_EXECUTABLE (FvFileInfo->Type)) {
//
// Get the size of the first executable section out of the file.
//
Status = FvFsFindExecutableSection (FvProtocol, FvFileInfo, &FvFileInfo->FileInfo.FileSize, &IgnoredPtr);
if (Status == EFI_WARN_BUFFER_TOO_SMALL) {
return EFI_SUCCESS;
}
} else if (FvFileInfo->Type == EFI_FV_FILETYPE_FREEFORM) {
//
// Try to get the size of a raw section out of the file
//
Status = FvProtocol->ReadSection (
FvProtocol,
&FvFileInfo->NameGuid,
EFI_SECTION_RAW,
0,
&IgnoredPtr,
&FvFileInfo->FileInfo.FileSize,
&AuthenticationStatus
);
if (Status == EFI_WARN_BUFFER_TOO_SMALL) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
//
// Didn't find a raw section, just return the whole file's size.
//
return FvProtocol->ReadFile (
FvProtocol,
&FvFileInfo->NameGuid,
NULL,
&FvFileInfo->FileInfo.FileSize,
&FoundType,
&Attributes,
&AuthenticationStatus
);
}
} else {
//
// Get the size of the entire file
//
return FvProtocol->ReadFile (
FvProtocol,
&FvFileInfo->NameGuid,
NULL,
&FvFileInfo->FileInfo.FileSize,
&FoundType,
&Attributes,
&AuthenticationStatus
);
}
return Status;
}
/**
Helper function to read a file.
The data returned depends on the type of the underlying FV file:
- For executable types, the first section found that contains executable code is returned.
- For files of type FREEFORM, the driver attempts to return the first section of type RAW.
If none is found, the entire contents of the FV file are returned.
- On all other files the entire contents of the FV file is returned, as by
EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadFile.
@param FvProtocol A pointer to the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param FvFileInfo A pointer to the FV_FILESYSTEM_FILE_INFO instance that is a struct
representing a file's info.
@param BufferSize Pointer to a caller-allocated UINTN. It indicates the size of
the memory represented by *Buffer.
@param Buffer Pointer to a pointer to a data buffer to contain file content.
@retval EFI_SUCCESS The call completed successfully.
@retval EFI_WARN_BUFFER_TOO_SMALL The buffer is too small to contain the requested output.
@retval EFI_ACCESS_DENIED The firmware volume is configured to disallow reads.
@retval EFI_NOT_FOUND The requested file was not found in the firmware volume.
@retval EFI_DEVICE_ERROR A hardware error occurred when attempting toaccess the firmware volume.
**/
EFI_STATUS
FvFsReadFile (
IN EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol,
IN FV_FILESYSTEM_FILE_INFO *FvFileInfo,
IN OUT UINTN *BufferSize,
IN OUT VOID **Buffer
)
{
UINT32 AuthenticationStatus;
EFI_FV_FILETYPE FoundType;
EFI_FV_FILE_ATTRIBUTES Attributes;
EFI_STATUS Status;
if (FV_FILETYPE_IS_EXECUTABLE (FvFileInfo->Type)) {
//
// Read the first executable section out of the file.
//
Status = FvFsFindExecutableSection (FvProtocol, FvFileInfo, BufferSize, Buffer);
} else if (FvFileInfo->Type == EFI_FV_FILETYPE_FREEFORM) {
//
// Try to read a raw section out of the file
//
Status = FvProtocol->ReadSection (
FvProtocol,
&FvFileInfo->NameGuid,
EFI_SECTION_RAW,
0,
Buffer,
BufferSize,
&AuthenticationStatus
);
if (EFI_ERROR (Status)) {
//
// Didn't find a raw section, just return the whole file.
//
Status = FvProtocol->ReadFile (
FvProtocol,
&FvFileInfo->NameGuid,
Buffer,
BufferSize,
&FoundType,
&Attributes,
&AuthenticationStatus
);
}
} else {
//
// Read the entire file
//
Status = FvProtocol->ReadFile (
FvProtocol,
&FvFileInfo->NameGuid,
Buffer,
BufferSize,
&FoundType,
&Attributes,
&AuthenticationStatus
);
}
return Status;
}
/**
Helper function for populating an EFI_FILE_INFO for a file.
Note the CreateTime, LastAccessTime and ModificationTime fields in EFI_FILE_INFO
are full zero as FV2 protocol has no corresponding info to fill.
@param FvFileInfo A pointer to the FV_FILESYSTEM_FILE_INFO instance that is a struct
representing a file's info.
@param BufferSize Pointer to a caller-allocated UINTN. It indicates the size of
the memory represented by FileInfo.
@param FileInfo A pointer to EFI_FILE_INFO to contain the returned file info.
@retval EFI_SUCCESS The call completed successfully.
@retval EFI_BUFFER_TOO_SMALL The buffer is too small to contain the requested output.
**/
EFI_STATUS
FvFsGetFileInfo (
IN FV_FILESYSTEM_FILE_INFO *FvFileInfo,
IN OUT UINTN *BufferSize,
OUT EFI_FILE_INFO *FileInfo
)
{
UINTN InfoSize;
InfoSize = FvFileInfo->FileInfo.Size;
if (*BufferSize < InfoSize) {
*BufferSize = InfoSize;
return EFI_BUFFER_TOO_SMALL;
}
//
// Initialize FileInfo
//
CopyMem (FileInfo, &FvFileInfo->FileInfo, InfoSize);
*BufferSize = InfoSize;
return EFI_SUCCESS;
}
/**
Removes the last directory or file entry in a path by changing the last
L'\' to a CHAR_NULL.
@param Path The pointer to the path to modify.
@retval FALSE Nothing was found to remove.
@retval TRUE A directory or file was removed.
**/
BOOLEAN
EFIAPI
RemoveLastItemFromPath (
IN OUT CHAR16 *Path
)
{
CHAR16 *Walker;
CHAR16 *LastSlash;
//
// get directory name from path... ('chop' off extra)
//
for ( Walker = Path, LastSlash = NULL
; Walker != NULL && *Walker != CHAR_NULL
; Walker++
){
if (*Walker == L'\\' && *(Walker + 1) != CHAR_NULL) {
LastSlash = Walker + 1;
}
}
if (LastSlash != NULL) {
*LastSlash = CHAR_NULL;
return (TRUE);
}
return (FALSE);
}
/**
Function to clean up paths.
- Single periods in the path are removed.
- Double periods in the path are removed along with a single parent directory.
- Forward slashes L'/' are converted to backward slashes L'\'.
This will be done inline and the existing buffer may be larger than required
upon completion.
@param Path The pointer to the string containing the path.
@retval NULL An error occured.
@return Path in all other instances.
**/
CHAR16*
EFIAPI
TrimFilePathToAbsolutePath (
IN CHAR16 *Path
)
{
CHAR16 *TempString;
UINTN TempSize;
if (Path == NULL) {
return NULL;
}
//
// Fix up the '/' vs '\'
//
for (TempString = Path ; (TempString != NULL) && (*TempString != CHAR_NULL); TempString++) {
if (*TempString == L'/') {
*TempString = L'\\';
}
}
//
// Fix up the ..
//
while ((TempString = StrStr (Path, L"\\..\\")) != NULL) {
*TempString = CHAR_NULL;
TempString += 4;
RemoveLastItemFromPath (Path);
TempSize = StrSize (TempString);
CopyMem (Path + StrLen (Path), TempString, TempSize);
}
if (((TempString = StrStr (Path, L"\\..")) != NULL) && (*(TempString + 3) == CHAR_NULL)) {
*TempString = CHAR_NULL;
RemoveLastItemFromPath (Path);
}
//
// Fix up the .
//
while ((TempString = StrStr (Path, L"\\.\\")) != NULL) {
*TempString = CHAR_NULL;
TempString += 2;
TempSize = StrSize (TempString);
CopyMem(Path + StrLen (Path), TempString, TempSize);
}
if (((TempString = StrStr (Path, L"\\.")) != NULL) && (*(TempString + 2) == CHAR_NULL)) {
*(TempString + 1) = CHAR_NULL;
}
while ((TempString = StrStr (Path, L"\\\\")) != NULL) {
*TempString = CHAR_NULL;
TempString += 1;
TempSize = StrSize(TempString);
CopyMem(Path + StrLen(Path), TempString, TempSize);
}
if (((TempString = StrStr(Path, L"\\\\")) != NULL) && (*(TempString + 1) == CHAR_NULL)) {
*(TempString) = CHAR_NULL;
}
return Path;
}
/**
Opens a new file relative to the source file's location.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to the source location. This would typically be an open
handle to a directory.
@param NewHandle A pointer to the location to return the opened handle for the new
file.
@param FileName The Null-terminated string of the name of the file to be opened.
The file name may contain the following path modifiers: "\", ".",
and "..".
@param OpenMode The mode to open the file. The only valid combinations that the
file may be opened with are: Read, Read/Write, or Create/Read/Write.
@param Attributes Only valid for EFI_FILE_MODE_CREATE, in which case these are the
attribute bits for the newly created file.
@retval EFI_SUCCESS The file was opened.
@retval EFI_NOT_FOUND The specified file could not be found on the device.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_MEDIA_CHANGED The device has a different medium in it or the medium is no
longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a file for write
when the media is write-protected.
@retval EFI_ACCESS_DENIED The service denied access to the file.
@retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the file.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemOpen (
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE *File;
FV_FILESYSTEM_FILE *NewFile;
FV_FILESYSTEM_FILE_INFO *FvFileInfo;
LIST_ENTRY *FvFileInfoLink;
//
// Check for a valid mode
//
switch (OpenMode) {
case EFI_FILE_MODE_READ:
break;
default:
return EFI_WRITE_PROTECTED;
}
File = FVFS_FILE_FROM_FILE_THIS (This);
Instance = File->Instance;
FileName = TrimFilePathToAbsolutePath (FileName);
if (FileName[0] == L'\\') {
FileName++;
}
//
// Check for opening root
//
if (StrCmp (FileName, L".") == 0 || StrCmp (FileName, L"") == 0) {
NewFile = AllocateZeroPool (sizeof (FV_FILESYSTEM_FILE));
if (NewFile == NULL) {
return EFI_OUT_OF_RESOURCES;
}
NewFile->Signature = FVFS_FILE_SIGNATURE;
NewFile->Instance = Instance;
NewFile->FvFileInfo = File->FvFileInfo;
CopyMem (&NewFile->FileProtocol, &mFileSystemTemplate, sizeof (mFileSystemTemplate));
InitializeListHead (&NewFile->Link);
InsertHeadList (&Instance->FileHead, &NewFile->Link);
NewFile->DirReadNext = FVFS_GET_FIRST_FILE_INFO (Instance);
*NewHandle = &NewFile->FileProtocol;
return EFI_SUCCESS;
}
//
// Do a linear search for a file in the FV with a matching filename
//
for (FvFileInfoLink = GetFirstNode (&Instance->FileInfoHead);
!IsNull (&Instance->FileInfoHead, FvFileInfoLink);
FvFileInfoLink = GetNextNode (&Instance->FileInfoHead, FvFileInfoLink)) {
FvFileInfo = FVFS_FILE_INFO_FROM_LINK (FvFileInfoLink);
if (mUnicodeCollation->StriColl (mUnicodeCollation, &FvFileInfo->FileInfo.FileName[0], FileName) == 0) {
NewFile = AllocateZeroPool (sizeof (FV_FILESYSTEM_FILE));
if (NewFile == NULL) {
return EFI_OUT_OF_RESOURCES;
}
NewFile->Signature = FVFS_FILE_SIGNATURE;
NewFile->Instance = Instance;
NewFile->FvFileInfo = FvFileInfo;
CopyMem (&NewFile->FileProtocol, &mFileSystemTemplate, sizeof (mFileSystemTemplate));
InitializeListHead (&NewFile->Link);
InsertHeadList (&Instance->FileHead, &NewFile->Link);
*NewHandle = &NewFile->FileProtocol;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
/**
Closes a specified file handle.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to close.
@retval EFI_SUCCESS The file was closed.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemClose (
IN EFI_FILE_PROTOCOL *This
)
{
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE *File;
File = FVFS_FILE_FROM_FILE_THIS (This);
Instance = File->Instance;
if (File != Instance->Root) {
RemoveEntryList (&File->Link);
FreePool (File);
}
return EFI_SUCCESS;
}
/**
Reads data from a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to read data from.
@param BufferSize On input, the size of the Buffer. On output, the amount of data
returned in Buffer. In both cases, the size is measured in bytes.
@param Buffer The buffer into which the data is read.
@retval EFI_SUCCESS Data was read.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_DEVICE_ERROR An attempt was made to read from a deleted file.
@retval EFI_DEVICE_ERROR On entry, the current file position is beyond the end of the file.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory
entry. BufferSize has been updated with the size
needed to complete the request.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemRead (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE *File;
EFI_STATUS Status;
LIST_ENTRY *FvFileInfoLink;
VOID *FileBuffer;
UINTN FileSize;
File = FVFS_FILE_FROM_FILE_THIS (This);
Instance = File->Instance;
if (File->FvFileInfo == Instance->Root->FvFileInfo) {
if (File->DirReadNext) {
//
// Directory read: populate Buffer with an EFI_FILE_INFO
//
Status = FvFsGetFileInfo (File->DirReadNext, BufferSize, Buffer);
if (!EFI_ERROR (Status)) {
//
// Successfully read a directory entry, now update the pointer to the
// next file, which will be read on the next call to this function
//
FvFileInfoLink = GetNextNode (&Instance->FileInfoHead, &File->DirReadNext->Link);
if (IsNull (&Instance->FileInfoHead, FvFileInfoLink)) {
//
// No more files left
//
File->DirReadNext = NULL;
} else {
File->DirReadNext = FVFS_FILE_INFO_FROM_LINK (FvFileInfoLink);
}
}
return Status;
} else {
//
// Directory read. All entries have been read, so return a zero-size
// buffer.
//
*BufferSize = 0;
return EFI_SUCCESS;
}
} else {
FileSize = File->FvFileInfo->FileInfo.FileSize;
FileBuffer = AllocateZeroPool (FileSize);
if (FileBuffer == NULL) {
return EFI_DEVICE_ERROR;
}
Status = FvFsReadFile (File->Instance->FvProtocol, File->FvFileInfo, &FileSize, &FileBuffer);
if (EFI_ERROR (Status)) {
return EFI_DEVICE_ERROR;
}
if (*BufferSize + File->Position > FileSize) {
*BufferSize = FileSize - File->Position;
}
CopyMem (Buffer, (UINT8*)FileBuffer + File->Position, *BufferSize);
File->Position += *BufferSize;
return EFI_SUCCESS;
}
}
/**
Writes data to a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to write data to.
@param BufferSize On input, the size of the Buffer. On output, the amount of data
actually written. In both cases, the size is measured in bytes.
@param Buffer The buffer of data to write.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Writes to open directory files are not supported.
@retval EFI_NO_MEDIA The device has no medium.
@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 file or medium is write-protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemWrite (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
{
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE *File;
File = FVFS_FILE_FROM_FILE_THIS (This);
Instance = File->Instance;
if (File->FvFileInfo == Instance->Root->FvFileInfo) {
return EFI_UNSUPPORTED;
} else {
return EFI_WRITE_PROTECTED;
}
}
/**
Returns a file's current position.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to get the current position on.
@param Position The address to return the file's current position value.
@retval EFI_SUCCESS The position was returned.
@retval EFI_UNSUPPORTED The request is not valid on open directories.
@retval EFI_DEVICE_ERROR An attempt was made to get the position from a deleted file.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemGetPosition (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
)
{
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE *File;
File = FVFS_FILE_FROM_FILE_THIS (This);
Instance = File->Instance;
if (File->FvFileInfo == Instance->Root->FvFileInfo) {
return EFI_UNSUPPORTED;
} else {
*Position = File->Position;
return EFI_SUCCESS;
}
}
/**
Sets a file's current position.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the
file handle to set the requested position on.
@param Position The byte position from the start of the file to set.
@retval EFI_SUCCESS The position was set.
@retval EFI_UNSUPPORTED The seek request for nonzero is not valid on open
directories.
@retval EFI_DEVICE_ERROR An attempt was made to set the position of a deleted file.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemSetPosition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
)
{
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE *File;
File = FVFS_FILE_FROM_FILE_THIS (This);
Instance = File->Instance;
if (File->FvFileInfo == Instance->Root->FvFileInfo) {
if (Position != 0) {
return EFI_UNSUPPORTED;
}
//
// Reset directory position to first entry
//
File->DirReadNext = FVFS_GET_FIRST_FILE_INFO (Instance);
} else if (Position == 0xFFFFFFFFFFFFFFFFull) {
File->Position = File->FvFileInfo->FileInfo.FileSize;
} else {
File->Position = Position;
}
return EFI_SUCCESS;
}
/**
Flushes all modified data associated with a file to a device.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to flush.
@retval EFI_SUCCESS The data was flushed.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write-protected.
@retval EFI_ACCESS_DENIED The file was opened read-only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemFlush (
IN EFI_FILE_PROTOCOL *This
)
{
return EFI_WRITE_PROTECTED;
}
/**
Close and delete the file handle.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the
handle to the file to delete.
@retval EFI_SUCCESS The file was closed and deleted, and the handle was closed.
@retval EFI_WARN_DELETE_FAILURE The handle was closed, but the file was not deleted.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemDelete (
IN EFI_FILE_PROTOCOL *This
)
{
EFI_STATUS Status;
Status = FvSimpleFileSystemClose (This);
ASSERT_EFI_ERROR (Status);
return EFI_WARN_DELETE_FAILURE;
}
/**
Returns information about a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle the requested information is for.
@param InformationType The type identifier for the information being requested.
@param BufferSize On input, the size of Buffer. On output, the amount of data
returned in Buffer. In both cases, the size is measured in bytes.
@param Buffer A pointer to the data buffer to return. The buffer's type is
indicated by InformationType.
@retval EFI_SUCCESS The information was returned.
@retval EFI_UNSUPPORTED The InformationType is not known.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory entry.
BufferSize has been updated with the size needed to complete
the request.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
FV_FILESYSTEM_FILE *File;
EFI_FILE_SYSTEM_INFO *FsInfoOut;
EFI_FILE_SYSTEM_VOLUME_LABEL *FsVolumeLabel;
FV_FILESYSTEM_INSTANCE *Instance;
UINTN Size;
EFI_STATUS Status;
File = FVFS_FILE_FROM_FILE_THIS (This);
if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
//
// Return filesystem info
//
Instance = File->Instance;
Size = sizeof (EFI_FILE_SYSTEM_INFO) + StrSize (Instance->VolumeLabel) - sizeof (CHAR16);
if (*BufferSize < Size) {
*BufferSize = Size;
return EFI_BUFFER_TOO_SMALL;
}
//
// Cast output buffer for convenience
//
FsInfoOut = (EFI_FILE_SYSTEM_INFO *) Buffer;
CopyMem (FsInfoOut, &mFsInfoTemplate, sizeof (EFI_FILE_SYSTEM_INFO));
Status = StrnCpyS (FsInfoOut->VolumeLabel, (*BufferSize - OFFSET_OF (EFI_FILE_SYSTEM_INFO, VolumeLabel)) / sizeof (CHAR16), Instance->VolumeLabel, StrLen (Instance->VolumeLabel));
ASSERT_EFI_ERROR (Status);
FsInfoOut->Size = Size;
return Status;
} else if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {
//
// Return file info
//
return FvFsGetFileInfo (File->FvFileInfo, BufferSize, (EFI_FILE_INFO *) Buffer);
} else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
//
// Return Volume Label
//
Instance = File->Instance;
Size = sizeof (EFI_FILE_SYSTEM_VOLUME_LABEL) + StrSize (Instance->VolumeLabel) - sizeof (CHAR16);;
if (*BufferSize < Size) {
*BufferSize = Size;
return EFI_BUFFER_TOO_SMALL;
}
FsVolumeLabel = (EFI_FILE_SYSTEM_VOLUME_LABEL*) Buffer;
Status = StrnCpyS (FsVolumeLabel->VolumeLabel, (*BufferSize - OFFSET_OF (EFI_FILE_SYSTEM_VOLUME_LABEL, VolumeLabel)) / sizeof (CHAR16), Instance->VolumeLabel, StrLen (Instance->VolumeLabel));
ASSERT_EFI_ERROR (Status);
return Status;
} else {
return EFI_UNSUPPORTED;
}
}
/**
Sets information about a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle the information is for.
@param InformationType The type identifier for the information being set.
@param BufferSize The size, in bytes, of Buffer.
@param Buffer A pointer to the data buffer to write. The buffer's type is
indicated by InformationType.
@retval EFI_SUCCESS The information was set.
@retval EFI_UNSUPPORTED The InformationType is not known.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_INFO_ID and the media is
read-only.
@retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_PROTOCOL_SYSTEM_INFO_ID
and the media is read only.
@retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_SYSTEM_VOLUME_LABEL_ID
and the media is read-only.
@retval EFI_ACCESS_DENIED An attempt is made to change the name of a file to a
file that is already present.
@retval EFI_ACCESS_DENIED An attempt is being made to change the EFI_FILE_DIRECTORY
Attribute.
@retval EFI_ACCESS_DENIED An attempt is being made to change the size of a directory.
@retval EFI_ACCESS_DENIED InformationType is EFI_FILE_INFO_ID and the file was opened
read-only and an attempt is being made to modify a field
other than Attribute.
@retval EFI_VOLUME_FULL The volume is full.
@retval EFI_BAD_BUFFER_SIZE BufferSize is smaller than the size of the type indicated
by InformationType.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemSetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid) ||
CompareGuid (InformationType, &gEfiFileInfoGuid) ||
CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
return EFI_WRITE_PROTECTED;
}
return EFI_UNSUPPORTED;
}

BIN
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@ -0,0 +1,74 @@
## @file
# Support for Simple File System over Firmware Volume.
#
# This driver uses the EFI_FIRMWARE_VOLUME2_PROTOCOL to expose files in firmware
# volumes via the the EFI_SIMPLE_FILESYSTEM_PROTOCOL and EFI_FILE_PROTOCOL.
#
# It will expose a single directory, containing one file for each file in the firmware
# volume. If a file has a UI section, its contents will be used as a filename.
# Otherwise, a string representation of the GUID will be used.
# Files of an executable type (That is PEIM, DRIVER, COMBINED_PEIM_DRIVER and APPLICATION)
# will have ".efi" added to their filename.
#
# Its primary intended use is to be able to start EFI applications embedded in FVs
# from the UEFI shell. It is entirely read-only.
#
# Copyright (c) 2014, ARM Ltd. All rights reserved.<BR>
# Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
##
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = FvSimpleFileSystem
MODULE_UNI_FILE = FvSimpleFileSystem.uni
FILE_GUID = 907125c0-a5f1-11e3-a3fe-a3198b49350c
MODULE_TYPE = UEFI_DRIVER
VERSION_STRING = 1.0
ENTRY_POINT = FvSimpleFileSystemEntryPoint
[Sources]
ComponentName.c
FvSimpleFileSystem.c
FvSimpleFileSystemEntryPoint.c
FvSimpleFileSystemInternal.h
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
[LibraryClasses]
BaseLib
DevicePathLib
MemoryAllocationLib
PrintLib
UefiDriverEntryPoint
UefiLib
[Pcd]
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultPlatformLang ## SOMETIMES_CONSUMES
gEfiMdePkgTokenSpaceGuid.PcdUefiVariableDefaultLang ## SOMETIMES_CONSUMES
[Guids]
gEfiFileInfoGuid ## SOMETIMES_CONSUMES ## UNDEFINED
gEfiFileSystemInfoGuid ## SOMETIMES_CONSUMES ## UNDEFINED
gEfiFileSystemVolumeLabelInfoIdGuid ## SOMETIMES_CONSUMES ## UNDEFINED
[Protocols]
gEfiDevicePathProtocolGuid ## TO_START
gEfiFirmwareVolume2ProtocolGuid ## TO_START
gEfiUnicodeCollationProtocolGuid ## TO_START
gEfiUnicodeCollation2ProtocolGuid ## TO_START
gEfiSimpleFileSystemProtocolGuid ## BY_START
[UserExtensions.TianoCore."ExtraFiles"]
FvSimpleFileSystemExtra.uni

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/** @file
This driver uses the EFI_FIRMWARE_VOLUME2_PROTOCOL to expose files in firmware
volumes via the the EFI_SIMPLE_FILESYSTEM_PROTOCOL and EFI_FILE_PROTOCOL.
It will expose a single directory, containing one file for each file in the firmware
volume. If a file has a UI section, its contents will be used as a filename.
Otherwise, a string representation of the GUID will be used.
Files of an executable type (That is PEIM, DRIVER, COMBINED_PEIM_DRIVER and APPLICATION)
will have ".efi" added to their filename.
Its primary intended use is to be able to start EFI applications embedded in FVs
from the UEFI shell. It is entirely read-only.
Copyright (c) 2014, ARM Limited. All rights reserved.
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "FvSimpleFileSystemInternal.h"
EFI_UNICODE_COLLATION_PROTOCOL *mUnicodeCollation = NULL;
//
// A Guid string is 32 hex characters with 4 hyphens and a NULL-terminated char: 37 characters total
//
#define GUID_STRING_SIZE (37 * sizeof (CHAR16))
#define FVFS_VOLUME_LABEL_PREFIX L"Firmware Volume: "
#define FVFS_VOLUME_LABEL_SIZE (sizeof (FVFS_VOLUME_LABEL_PREFIX) + GUID_STRING_SIZE - sizeof (CHAR16))
#define FVFS_FALLBACK_VOLUME_LABEL L"Firmware Volume"
//
// Template for EFI_SIMPLE_FILE_SYSTEM_PROTOCOL data structure.
//
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL mSimpleFsTemplate = {
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,
FvSimpleFileSystemOpenVolume
};
//
// Template for EFI_DRIVER_BINDING_PROTOCOL data structure.
//
EFI_DRIVER_BINDING_PROTOCOL mDriverBinding = {
FvSimpleFileSystemDriverSupported,
FvSimpleFileSystemDriverStart,
FvSimpleFileSystemDriverStop,
0,
NULL,
NULL
};
/**
Open the root directory on a volume.
@param This A pointer to the volume to open the root directory.
@param RootFile A pointer to the location to return the opened file handle for the
root directory.
@retval EFI_SUCCESS The device was opened.
@retval EFI_UNSUPPORTED This volume does not support the requested file system type.
@retval EFI_NO_MEDIA The device has no medium.
@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_MEDIA_CHANGED The device has a different medium in it or the medium is no
longer supported. Any existing file handles for this volume are
no longer valid. To access the files on the new medium, the
volume must be reopened with OpenVolume().
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemOpenVolume (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **RootFile
)
{
EFI_STATUS Status;
FV_FILESYSTEM_FILE *Root;
CHAR16 *UiSection;
EFI_GUID NameGuid;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINT32 Authentication;
UINTN Key;
EFI_FV_FILETYPE FileType;
UINTN Size;
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE_INFO *FvFileInfo;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol;
CHAR16 *Name;
UINTN NameLen;
UINTN NumChars;
UINTN DestMax;
Instance = FVFS_INSTANCE_FROM_SIMPLE_FS_THIS (This);
Status = EFI_SUCCESS;
if (Instance->Root == NULL) {
//
// Allocate file structure for root file
//
Root = AllocateZeroPool (sizeof (FV_FILESYSTEM_FILE));
if (Root == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Instance->Root = Root;
Root->Instance = Instance;
Root->Signature = FVFS_FILE_SIGNATURE;
CopyMem (&Root->FileProtocol, &mFileSystemTemplate, sizeof (mFileSystemTemplate));
Root->FvFileInfo = AllocateZeroPool (sizeof (FV_FILESYSTEM_FILE_INFO));
if (Root->FvFileInfo == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Root->FvFileInfo->FileInfo.Size = sizeof (EFI_FILE_INFO);
Root->FvFileInfo->FileInfo.Attribute = EFI_FILE_DIRECTORY | EFI_FILE_READ_ONLY;
//
// Populate the instance's list of files. We consider anything a file that
// has a UI_SECTION, which we consider to be its filename.
//
FvProtocol = Instance->FvProtocol;
//
// Allocate Key
//
Key = 0;
do {
FileType = EFI_FV_FILETYPE_ALL;
Status = FvProtocol->GetNextFile (
FvProtocol,
&Key,
&FileType,
&NameGuid,
&Attributes,
&Size
);
if (EFI_ERROR (Status)) {
ASSERT (Status == EFI_NOT_FOUND);
break;
}
//
// Get a file's name: If it has a UI section, use that, otherwise use
// its NameGuid.
//
UiSection = NULL;
Status = FvProtocol->ReadSection (
FvProtocol,
&NameGuid,
EFI_SECTION_USER_INTERFACE,
0,
(VOID **)&UiSection,
&Size,
&Authentication
);
if (!EFI_ERROR (Status)) {
Name = UiSection;
} else {
Name = AllocateZeroPool (GUID_STRING_SIZE);
if (Name == NULL) {
return EFI_OUT_OF_RESOURCES;
}
NumChars = UnicodeSPrint (Name, GUID_STRING_SIZE, L"%g", &NameGuid);
ASSERT ((NumChars + 1) * sizeof (CHAR16) == GUID_STRING_SIZE);
}
//
// Found a file.
// Allocate a file structure and populate it.
//
NameLen = StrSize (Name);
if (FV_FILETYPE_IS_EXECUTABLE (FileType)) {
NameLen += StrSize (L".efi") - sizeof (CHAR16);
}
FvFileInfo = AllocateZeroPool (sizeof (FV_FILESYSTEM_FILE_INFO) + NameLen - sizeof (CHAR16));
if (FvFileInfo == NULL) {
return EFI_OUT_OF_RESOURCES;
}
FvFileInfo->Signature = FVFS_FILE_INFO_SIGNATURE;
InitializeListHead (&FvFileInfo->Link);
CopyMem (&FvFileInfo->NameGuid, &NameGuid, sizeof (EFI_GUID));
FvFileInfo->Type = FileType;
//
// Add ".efi" to filenames of drivers and applications.
//
DestMax = NameLen / sizeof (CHAR16);
Status = StrnCpyS (&FvFileInfo->FileInfo.FileName[0], DestMax, Name, StrLen (Name));
ASSERT_EFI_ERROR (Status);
if (FV_FILETYPE_IS_EXECUTABLE (FileType)) {
Status = StrnCatS (&FvFileInfo->FileInfo.FileName[0], DestMax, L".efi", StrLen (L".efi"));
ASSERT_EFI_ERROR (Status);
}
FvFileInfo->FileInfo.Size = sizeof (EFI_FILE_INFO) + NameLen - sizeof (CHAR16);
Status = FvFsGetFileSize (FvProtocol, FvFileInfo);
ASSERT_EFI_ERROR (Status);
FvFileInfo->FileInfo.PhysicalSize = FvFileInfo->FileInfo.FileSize;
FvFileInfo->FileInfo.Attribute = EFI_FILE_READ_ONLY;
InsertHeadList (&Instance->FileInfoHead, &FvFileInfo->Link);
FreePool (Name);
} while (TRUE);
if (Status == EFI_NOT_FOUND) {
Status = EFI_SUCCESS;
}
}
Instance->Root->DirReadNext = FVFS_GET_FIRST_FILE_INFO (Instance);
*RootFile = &Instance->Root->FileProtocol;
return Status;
}
/**
Worker function to initialize Unicode Collation support.
It tries to locate Unicode Collation (2) protocol and matches it with current
platform language code.
@param AgentHandle The handle used to open Unicode Collation (2) protocol.
@param ProtocolGuid The pointer to Unicode Collation (2) protocol GUID.
@param VariableName The name of the RFC 4646 or ISO 639-2 language variable.
@param DefaultLanguage The default language in case the RFC 4646 or ISO 639-2 language is absent.
@retval EFI_SUCCESS The Unicode Collation (2) protocol has been successfully located.
@retval Others The Unicode Collation (2) protocol has not been located.
**/
EFI_STATUS
InitializeUnicodeCollationSupportWorker (
IN EFI_HANDLE AgentHandle,
IN EFI_GUID *ProtocolGuid,
IN CONST CHAR16 *VariableName,
IN CONST CHAR8 *DefaultLanguage
)
{
EFI_STATUS ReturnStatus;
EFI_STATUS Status;
UINTN NumHandles;
UINTN Index;
EFI_HANDLE *Handles;
EFI_UNICODE_COLLATION_PROTOCOL *Uci;
BOOLEAN Iso639Language;
CHAR8 *Language;
CHAR8 *BestLanguage;
Status = gBS->LocateHandleBuffer (
ByProtocol,
ProtocolGuid,
NULL,
&NumHandles,
&Handles
);
if (EFI_ERROR (Status)) {
return Status;
}
Iso639Language = (BOOLEAN) (ProtocolGuid == &gEfiUnicodeCollationProtocolGuid);
GetEfiGlobalVariable2 (VariableName, (VOID**) &Language, NULL);
ReturnStatus = EFI_UNSUPPORTED;
for (Index = 0; Index < NumHandles; Index++) {
//
// Open Unicode Collation Protocol
//
Status = gBS->OpenProtocol (
Handles[Index],
ProtocolGuid,
(VOID **) &Uci,
AgentHandle,
NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
continue;
}
//
// Find the best matching matching language from the supported languages
// of Unicode Collation (2) protocol.
//
BestLanguage = GetBestLanguage (
Uci->SupportedLanguages,
Iso639Language,
(Language == NULL) ? "" : Language,
DefaultLanguage,
NULL
);
if (BestLanguage != NULL) {
FreePool (BestLanguage);
mUnicodeCollation = Uci;
ReturnStatus = EFI_SUCCESS;
break;
}
}
if (Language != NULL) {
FreePool (Language);
}
FreePool (Handles);
return ReturnStatus;
}
/**
Initialize Unicode Collation support.
It tries to locate Unicode Collation 2 protocol and matches it with current
platform language code. If for any reason the first attempt fails, it then tries to
use Unicode Collation Protocol.
@param AgentHandle The handle used to open Unicode Collation (2) protocol.
@retval EFI_SUCCESS The Unicode Collation (2) protocol has been successfully located.
@retval Others The Unicode Collation (2) protocol has not been located.
**/
EFI_STATUS
InitializeUnicodeCollationSupport (
IN EFI_HANDLE AgentHandle
)
{
EFI_STATUS Status;
Status = EFI_UNSUPPORTED;
//
// First try to use RFC 4646 Unicode Collation 2 Protocol.
//
Status = InitializeUnicodeCollationSupportWorker (
AgentHandle,
&gEfiUnicodeCollation2ProtocolGuid,
L"PlatformLang",
(CONST CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLang)
);
//
// If the attempt to use Unicode Collation 2 Protocol fails, then we fall back
// on the ISO 639-2 Unicode Collation Protocol.
//
if (EFI_ERROR (Status)) {
Status = InitializeUnicodeCollationSupportWorker (
AgentHandle,
&gEfiUnicodeCollationProtocolGuid,
L"Lang",
(CONST CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultLang)
);
}
return Status;
}
/**
Test to see if this driver supports ControllerHandle.
@param DriverBinding 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
FvSimpleFileSystemDriverSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
return gBS->OpenProtocol (
ControllerHandle,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
gImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
}
/**
Start this driver on ControllerHandle by opening a FV protocol and
installing a SimpleFileSystem protocol on ControllerHandle.
@param DriverBinding 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
FvSimpleFileSystemDriverStart (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
EFI_STATUS Status;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol;
FV_FILESYSTEM_INSTANCE *Instance;
EFI_DEVICE_PATH_PROTOCOL *FvDevicePath;
EFI_GUID *FvGuid;
UINTN NumChars;
Status = InitializeUnicodeCollationSupport (DriverBinding->DriverBindingHandle);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Open FV protocol
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiFirmwareVolume2ProtocolGuid,
(VOID **) &FvProtocol,
gImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Create an instance
//
Instance = AllocateZeroPool (sizeof (FV_FILESYSTEM_INSTANCE));
if (Instance == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Instance->Root = NULL;
Instance->FvProtocol = FvProtocol;
Instance->Signature = FVFS_INSTANCE_SIGNATURE;
InitializeListHead (&Instance->FileInfoHead);
InitializeListHead (&Instance->FileHead);
CopyMem (&Instance->SimpleFs, &mSimpleFsTemplate, sizeof (mSimpleFsTemplate));
Status = gBS->InstallProtocolInterface(
&ControllerHandle,
&gEfiSimpleFileSystemProtocolGuid,
EFI_NATIVE_INTERFACE,
&Instance->SimpleFs
);
//
// Decide on a filesystem volume label, which will include the FV's guid.
// Get the device path to find the FV's GUID
//
Instance->VolumeLabel = NULL;
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
(VOID **) &FvDevicePath,
gImageHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (!EFI_ERROR (Status)) {
//
// Iterate over device path until we find a firmware volume node
//
while (!IsDevicePathEndType (FvDevicePath)) {
if (DevicePathType (FvDevicePath) == MEDIA_DEVICE_PATH &&
DevicePathSubType (FvDevicePath) == MEDIA_PIWG_FW_VOL_DP) {
//
// Allocate the volume label
//
Instance->VolumeLabel = AllocateZeroPool (FVFS_VOLUME_LABEL_SIZE);
//
// Check the allocation was successful
//
if (Instance->VolumeLabel != NULL) {
//
// Extract the FV's guid
//
FvGuid = &((MEDIA_FW_VOL_DEVICE_PATH *) FvDevicePath)->FvName;
//
// Build the volume label string
//
NumChars = UnicodeSPrint (
Instance->VolumeLabel,
FVFS_VOLUME_LABEL_SIZE,
FVFS_VOLUME_LABEL_PREFIX L"%g",
FvGuid
);
ASSERT ((NumChars + 1) * sizeof (CHAR16) == FVFS_VOLUME_LABEL_SIZE);
}
break;
}
FvDevicePath = NextDevicePathNode (FvDevicePath);
}
}
//
// If we didn't decide on a volume label, set a fallback one
//
if (Instance->VolumeLabel == NULL) {
Instance->VolumeLabel = AllocateCopyPool (
sizeof (FVFS_FALLBACK_VOLUME_LABEL),
FVFS_FALLBACK_VOLUME_LABEL
);
}
return Status;
}
/**
Stop this driver on ControllerHandle by removing SimpleFileSystem protocol and closing
the FV protocol on ControllerHandle.
@param DriverBinding 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
FvSimpleFileSystemDriverStop (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
)
{
EFI_STATUS Status;
FV_FILESYSTEM_INSTANCE *Instance;
FV_FILESYSTEM_FILE_INFO *FvFileInfo;
LIST_ENTRY *Entry;
LIST_ENTRY *DelEntry;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFile;
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiSimpleFileSystemProtocolGuid,
(VOID **) &SimpleFile,
DriverBinding->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
Instance = FVFS_INSTANCE_FROM_SIMPLE_FS_THIS (SimpleFile);
if (IsListEmpty (&Instance->FileHead) == FALSE) {
//
// Not all opened files are closed
//
return EFI_DEVICE_ERROR;
}
//
// Close and uninstall protocols.
//
Status = gBS->CloseProtocol (
ControllerHandle,
&gEfiFirmwareVolume2ProtocolGuid,
gImageHandle,
ControllerHandle
);
ASSERT_EFI_ERROR (Status);
Status = gBS->UninstallProtocolInterface (
ControllerHandle,
&gEfiSimpleFileSystemProtocolGuid,
&Instance->SimpleFs
);
ASSERT_EFI_ERROR (Status);
//
// Free file structures
//
if (!IsListEmpty (&Instance->FileInfoHead)) {
//
// Free the Subtask list.
//
for(Entry = Instance->FileInfoHead.ForwardLink;
Entry != (&Instance->FileInfoHead);
) {
DelEntry = Entry;
Entry = Entry->ForwardLink;
FvFileInfo = FVFS_FILE_INFO_FROM_LINK (DelEntry);
RemoveEntryList (DelEntry);
FreePool (FvFileInfo);
}
}
if (Instance->Root != NULL) {
//
// Root->Name is statically allocated, no need to free.
//
if (Instance->Root->FvFileInfo != NULL) {
FreePool (Instance->Root->FvFileInfo);
}
FreePool (Instance->Root);
}
//
// Free Instance
//
if (Instance->VolumeLabel != NULL) {
FreePool (Instance->VolumeLabel);
}
FreePool (Instance);
return EFI_SUCCESS;
}
/**
The user Entry Point for module FvSimpleFileSystem. 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
FvSimpleFileSystemEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&mDriverBinding,
ImageHandle,
&gFvSimpleFileSystemComponentName,
&gFvSimpleFileSystemComponentName2
);
ASSERT_EFI_ERROR (Status);
return Status;
}

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/** @file
The internal header file of FvSimpleFileSystem driver.
Copyright (c) 2014, ARM Limited. All rights reserved.
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __FVFS_INTERNAL_H__
#define __FVFS_INTERNAL_H__
#include <Uefi.h>
#include <PiDxe.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/DevicePathLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PrintLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Protocol/DriverBinding.h>
#include <Protocol/FirmwareVolume2.h>
#include <Protocol/SimpleFileSystem.h>
#include <Protocol/UnicodeCollation.h>
#include <Guid/FileSystemInfo.h>
#include <Guid/FileInfo.h>
#include <Guid/FileSystemVolumeLabelInfo.h>
typedef struct _FV_FILESYSTEM_FILE FV_FILESYSTEM_FILE;
typedef struct _FV_FILESYSTEM_FILE_INFO FV_FILESYSTEM_FILE_INFO;
typedef struct _FV_FILESYSTEM_INSTANCE FV_FILESYSTEM_INSTANCE;
//
// Struct representing an instance of the "filesystem". There will be one of
// these structs per FV.
//
struct _FV_FILESYSTEM_INSTANCE {
UINT32 Signature;
LIST_ENTRY FileInfoHead;
LIST_ENTRY FileHead;
EFI_DRIVER_BINDING_PROTOCOL *DriverBinding;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL SimpleFs;
FV_FILESYSTEM_FILE *Root;
CHAR16 *VolumeLabel;
};
//
// Struct representing a opening file. Each opening operation on file will
// create such an instance except for the "root directory", which will only
// be created once for each FV.
//
struct _FV_FILESYSTEM_FILE {
UINT32 Signature;
LIST_ENTRY Link;
FV_FILESYSTEM_FILE_INFO *DirReadNext;
FV_FILESYSTEM_INSTANCE *Instance;
EFI_FILE_PROTOCOL FileProtocol;
FV_FILESYSTEM_FILE_INFO *FvFileInfo;
UINT64 Position;
};
//
// Struct representing the info of a file.
//
struct _FV_FILESYSTEM_FILE_INFO {
UINT32 Signature;
LIST_ENTRY Link;
EFI_GUID NameGuid;
EFI_FV_FILETYPE Type;
EFI_FILE_INFO FileInfo;
};
#define FVFS_FILE_SIGNATURE SIGNATURE_32 ('f', 'v', 'f', 'i')
#define FVFS_FILE_INFO_SIGNATURE SIGNATURE_32 ('f', 'v', 'i', 'n')
#define FVFS_INSTANCE_SIGNATURE SIGNATURE_32 ('f', 'v', 'f', 's')
#define FVFS_INSTANCE_FROM_SIMPLE_FS_THIS(This) CR ( \
This, \
FV_FILESYSTEM_INSTANCE, \
SimpleFs, \
FVFS_INSTANCE_SIGNATURE \
)
#define FVFS_FILE_FROM_FILE_THIS(This) CR ( \
This, \
FV_FILESYSTEM_FILE, \
FileProtocol, \
FVFS_FILE_SIGNATURE \
)
#define FVFS_FILE_INFO_FROM_LINK(This) CR ( \
This, \
FV_FILESYSTEM_FILE_INFO, \
Link, \
FVFS_FILE_INFO_SIGNATURE \
)
#define FVFS_FILE_FROM_LINK(FileLink) CR (FileLink, FV_FILESYSTEM_FILE, Link, FVFS_FILE_SIGNATURE)
#define FVFS_GET_FIRST_FILE(Instance) FVFS_FILE_FROM_LINK (GetFirstNode (&Instance->FileHead))
#define FVFS_GET_FIRST_FILE_INFO(Instance) FVFS_FILE_INFO_FROM_LINK (GetFirstNode (&Instance->FileInfoHead))
#define FV_FILETYPE_IS_EXECUTABLE(Type) ((Type) == EFI_FV_FILETYPE_PEIM || \
(Type) == EFI_FV_FILETYPE_DRIVER || \
(Type) == EFI_FV_FILETYPE_COMBINED_PEIM_DRIVER || \
(Type) == EFI_FV_FILETYPE_APPLICATION)
/**
Open the root directory on a volume.
@param This A pointer to the volume to open the root directory.
@param RootFile A pointer to the location to return the opened file handle for the
root directory.
@retval EFI_SUCCESS The device was opened.
@retval EFI_UNSUPPORTED This volume does not support the requested file system type.
@retval EFI_NO_MEDIA The device has no medium.
@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_MEDIA_CHANGED The device has a different medium in it or the medium is no
longer supported. Any existing file handles for this volume are
no longer valid. To access the files on the new medium, the
volume must be reopened with OpenVolume().
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemOpenVolume (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **RootFile
);
/**
Test to see if this driver supports ControllerHandle.
@param DriverBinding 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
FvSimpleFileSystemDriverSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
);
/**
Start this driver on ControllerHandle by opening a FV protocol and
installing a SimpleFileSystem protocol on ControllerHandle.
@param DriverBinding 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
FvSimpleFileSystemDriverStart (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
);
/**
Stop this driver on ControllerHandle by removing SimpleFileSystem protocol and closing
the FV protocol on ControllerHandle.
@param DriverBinding 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
FvSimpleFileSystemDriverStop (
IN EFI_DRIVER_BINDING_PROTOCOL *DriverBinding,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
);
/**
Opens a new file relative to the source file's location.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to the source location. This would typically be an open
handle to a directory.
@param NewHandle A pointer to the location to return the opened handle for the new
file.
@param FileName The Null-terminated string of the name of the file to be opened.
The file name may contain the following path modifiers: "\", ".",
and "..".
@param OpenMode The mode to open the file. The only valid combinations that the
file may be opened with are: Read, Read/Write, or Create/Read/Write.
@param Attributes Only valid for EFI_FILE_MODE_CREATE, in which case these are the
attribute bits for the newly created file.
@retval EFI_SUCCESS The file was opened.
@retval EFI_NOT_FOUND The specified file could not be found on the device.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_MEDIA_CHANGED The device has a different medium in it or the medium is no
longer supported.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a file for write
when the media is write-protected.
@retval EFI_ACCESS_DENIED The service denied access to the file.
@retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the file.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemOpen (
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
);
/**
Closes a specified file handle.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to close.
@retval EFI_SUCCESS The file was closed.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemClose (
IN EFI_FILE_PROTOCOL *This
);
/**
Reads data from a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to read data from.
@param BufferSize On input, the size of the Buffer. On output, the amount of data
returned in Buffer. In both cases, the size is measured in bytes.
@param Buffer The buffer into which the data is read.
@retval EFI_SUCCESS Data was read.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_DEVICE_ERROR An attempt was made to read from a deleted file.
@retval EFI_DEVICE_ERROR On entry, the current file position is beyond the end of the file.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory
entry. BufferSize has been updated with the size
needed to complete the request.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemRead (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
/**
Writes data to a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to write data to.
@param BufferSize On input, the size of the Buffer. On output, the amount of data
actually written. In both cases, the size is measured in bytes.
@param Buffer The buffer of data to write.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Writes to open directory files are not supported.
@retval EFI_NO_MEDIA The device has no medium.
@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 file or medium is write-protected.
@retval EFI_ACCESS_DENIED The file was opened read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemWrite (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
);
/**
Returns a file's current position.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to get the current position on.
@param Position The address to return the file's current position value.
@retval EFI_SUCCESS The position was returned.
@retval EFI_UNSUPPORTED The request is not valid on open directories.
@retval EFI_DEVICE_ERROR An attempt was made to get the position from a deleted file.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemGetPosition (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
);
/**
Sets a file's current position.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the
file handle to set the requested position on.
@param Position The byte position from the start of the file to set.
@retval EFI_SUCCESS The position was set.
@retval EFI_UNSUPPORTED The seek request for nonzero is not valid on open
directories.
@retval EFI_DEVICE_ERROR An attempt was made to set the position of a deleted file.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemSetPosition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
);
/**
Flushes all modified data associated with a file to a device.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle to flush.
@retval EFI_SUCCESS The data was flushed.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The file or medium is write-protected.
@retval EFI_ACCESS_DENIED The file was opened read-only.
@retval EFI_VOLUME_FULL The volume is full.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemFlush (
IN EFI_FILE_PROTOCOL *This
);
/**
Close and delete the file handle.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the
handle to the file to delete.
@retval EFI_SUCCESS The file was closed and deleted, and the handle was closed.
@retval EFI_WARN_DELETE_FAILURE The handle was closed, but the file was not deleted.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemDelete (
IN EFI_FILE_PROTOCOL *This
);
/**
Returns information about a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle the requested information is for.
@param InformationType The type identifier for the information being requested.
@param BufferSize On input, the size of Buffer. On output, the amount of data
returned in Buffer. In both cases, the size is measured in bytes.
@param Buffer A pointer to the data buffer to return. The buffer's type is
indicated by InformationType.
@retval EFI_SUCCESS The information was returned.
@retval EFI_UNSUPPORTED The InformationType is not known.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to read the current directory entry.
BufferSize has been updated with the size needed to complete
the request.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
/**
Sets information about a file.
@param This A pointer to the EFI_FILE_PROTOCOL instance that is the file
handle the information is for.
@param InformationType The type identifier for the information being set.
@param BufferSize The size, in bytes, of Buffer.
@param Buffer A pointer to the data buffer to write. The buffer's type is
indicated by InformationType.
@retval EFI_SUCCESS The information was set.
@retval EFI_UNSUPPORTED The InformationType is not known.
@retval EFI_NO_MEDIA The device has no medium.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_INFO_ID and the media is
read-only.
@retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_PROTOCOL_SYSTEM_INFO_ID
and the media is read only.
@retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_SYSTEM_VOLUME_LABEL_ID
and the media is read-only.
@retval EFI_ACCESS_DENIED An attempt is made to change the name of a file to a
file that is already present.
@retval EFI_ACCESS_DENIED An attempt is being made to change the EFI_FILE_DIRECTORY
Attribute.
@retval EFI_ACCESS_DENIED An attempt is being made to change the size of a directory.
@retval EFI_ACCESS_DENIED InformationType is EFI_FILE_INFO_ID and the file was opened
read-only and an attempt is being made to modify a field
other than Attribute.
@retval EFI_VOLUME_FULL The volume is full.
@retval EFI_BAD_BUFFER_SIZE BufferSize is smaller than the size of the type indicated
by InformationType.
**/
EFI_STATUS
EFIAPI
FvSimpleFileSystemSetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
);
/**
Get the size of the buffer that will be returned by FvFsReadFile.
@param FvProtocol A pointer to the EFI_FIRMWARE_VOLUME2_PROTOCOL instance.
@param FvFileInfo A pointer to the FV_FILESYSTEM_FILE_INFO instance that is a struct
representing a file's info.
@retval EFI_SUCCESS The file size was gotten correctly.
@retval Others The file size wasn't gotten correctly.
**/
EFI_STATUS
FvFsGetFileSize (
IN EFI_FIRMWARE_VOLUME2_PROTOCOL *FvProtocol,
IN OUT FV_FILESYSTEM_FILE_INFO *FvFileInfo
);
/**
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
FvSimpleFileSystemComponentNameGetDriverName (
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 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
FvSimpleFileSystemComponentNameGetControllerName (
IN EFI_COMPONENT_NAME_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN CHAR8 *Language,
OUT CHAR16 **ControllerName
);
extern EFI_UNICODE_COLLATION_PROTOCOL *mUnicodeCollation;
extern EFI_FILE_PROTOCOL mFileSystemTemplate;
extern EFI_COMPONENT_NAME_PROTOCOL gFvSimpleFileSystemComponentName;
extern EFI_COMPONENT_NAME2_PROTOCOL gFvSimpleFileSystemComponentName2;
#endif