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audk/EmulatorPkg/Unix/Host/PosixFileSystem.c

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/*++ @file
POSIX Pthreads to emulate APs and implement threads
Copyright (c) 2011, Apple Inc. All rights reserved.
Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Host.h"
#define EMU_SIMPLE_FILE_SYSTEM_PRIVATE_SIGNATURE SIGNATURE_32 ('E', 'P', 'f', 's')
typedef struct {
UINTN Signature;
EMU_IO_THUNK_PROTOCOL *Thunk;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL SimpleFileSystem;
CHAR8 *FilePath;
CHAR16 *VolumeLabel;
BOOLEAN FileHandlesOpen;
} EMU_SIMPLE_FILE_SYSTEM_PRIVATE;
#define EMU_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS(a) \
CR (a, \
EMU_SIMPLE_FILE_SYSTEM_PRIVATE, \
SimpleFileSystem, \
EMU_SIMPLE_FILE_SYSTEM_PRIVATE_SIGNATURE \
)
#define EMU_EFI_FILE_PRIVATE_SIGNATURE SIGNATURE_32 ('E', 'P', 'f', 'i')
typedef struct {
UINTN Signature;
EMU_IO_THUNK_PROTOCOL *Thunk;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *SimpleFileSystem;
EFI_FILE_PROTOCOL EfiFile;
int fd;
DIR *Dir;
BOOLEAN IsRootDirectory;
BOOLEAN IsDirectoryPath;
BOOLEAN IsOpenedByRead;
char *FileName;
struct dirent *Dirent;
} EMU_EFI_FILE_PRIVATE;
#define EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS(a) \
CR (a, \
EMU_EFI_FILE_PRIVATE, \
EfiFile, \
EMU_EFI_FILE_PRIVATE_SIGNATURE \
)
EFI_STATUS
PosixFileGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
EFI_STATUS
PosixFileSetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
);
EFI_FILE_PROTOCOL gPosixFileProtocol = {
EFI_FILE_REVISION,
GasketPosixFileOpen,
GasketPosixFileCLose,
GasketPosixFileDelete,
GasketPosixFileRead,
GasketPosixFileWrite,
GasketPosixFileGetPossition,
GasketPosixFileSetPossition,
GasketPosixFileGetInfo,
GasketPosixFileSetInfo,
GasketPosixFileFlush
};
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL gPosixFileSystemProtocol = {
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,
GasketPosixOpenVolume,
};
/**
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
PosixOpenVolume (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **Root
)
{
EFI_STATUS Status;
EMU_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
EMU_EFI_FILE_PRIVATE *PrivateFile;
Private = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (This);
Status = EFI_OUT_OF_RESOURCES;
PrivateFile = malloc (sizeof (EMU_EFI_FILE_PRIVATE));
if (PrivateFile == NULL) {
goto Done;
}
PrivateFile->FileName = malloc (AsciiStrSize (Private->FilePath));
if (PrivateFile->FileName == NULL) {
goto Done;
}
AsciiStrCpyS (
PrivateFile->FileName,
AsciiStrSize (Private->FilePath),
Private->FilePath
);
PrivateFile->Signature = EMU_EFI_FILE_PRIVATE_SIGNATURE;
PrivateFile->Thunk = Private->Thunk;
PrivateFile->SimpleFileSystem = This;
PrivateFile->IsRootDirectory = TRUE;
PrivateFile->IsDirectoryPath = TRUE;
PrivateFile->IsOpenedByRead = TRUE;
CopyMem (&PrivateFile->EfiFile, &gPosixFileProtocol, sizeof (EFI_FILE_PROTOCOL));
PrivateFile->fd = -1;
PrivateFile->Dir = NULL;
PrivateFile->Dirent = NULL;
*Root = &PrivateFile->EfiFile;
PrivateFile->Dir = opendir (PrivateFile->FileName);
if (PrivateFile->Dir == NULL) {
Status = EFI_ACCESS_DENIED;
} else {
Status = EFI_SUCCESS;
}
Done:
if (EFI_ERROR (Status)) {
if (PrivateFile != NULL) {
if (PrivateFile->FileName != NULL) {
free (PrivateFile->FileName);
}
free (PrivateFile);
}
*Root = NULL;
}
return Status;
}
EFI_STATUS
ErrnoToEfiStatus ()
{
switch (errno) {
case EACCES:
return EFI_ACCESS_DENIED;
case EDQUOT:
case ENOSPC:
return EFI_VOLUME_FULL;
default:
return EFI_DEVICE_ERROR;
}
}
VOID
CutPrefix (
IN CHAR8 *Str,
IN UINTN Count
)
{
CHAR8 *Pointer;
if (AsciiStrLen (Str) < Count) {
ASSERT (0);
}
for (Pointer = Str; *(Pointer + Count); Pointer++) {
*Pointer = *(Pointer + Count);
}
*Pointer = *(Pointer + Count);
}
VOID
PosixSystemTimeToEfiTime (
IN time_t SystemTime,
OUT EFI_TIME *Time
)
{
struct tm *tm;
tm = gmtime (&SystemTime);
Time->Year = tm->tm_year;
Time->Month = tm->tm_mon + 1;
Time->Day = tm->tm_mday;
Time->Hour = tm->tm_hour;
Time->Minute = tm->tm_min;
Time->Second = tm->tm_sec;
Time->Nanosecond = 0;
Time->TimeZone = timezone / 60;
Time->Daylight = (daylight ? EFI_TIME_ADJUST_DAYLIGHT : 0) | (tm->tm_isdst > 0 ? EFI_TIME_IN_DAYLIGHT : 0);
}
EFI_STATUS
UnixSimpleFileSystemFileInfo (
EMU_EFI_FILE_PRIVATE *PrivateFile,
IN CHAR8 *FileName,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
UINTN Size;
UINTN NameSize;
UINTN ResultSize;
EFI_FILE_INFO *Info;
CHAR8 *RealFileName;
CHAR8 *TempPointer;
CHAR16 *BufferFileName;
struct stat buf;
if (FileName != NULL) {
RealFileName = FileName;
} else if (PrivateFile->IsRootDirectory) {
RealFileName = "";
} else {
RealFileName = PrivateFile->FileName;
}
TempPointer = RealFileName;
while (*TempPointer) {
if (*TempPointer == '/') {
RealFileName = TempPointer + 1;
}
TempPointer++;
}
Size = SIZE_OF_EFI_FILE_INFO;
NameSize = AsciiStrSize (RealFileName) * 2;
ResultSize = Size + NameSize;
if (*BufferSize < ResultSize) {
*BufferSize = ResultSize;
return EFI_BUFFER_TOO_SMALL;
}
if (stat (FileName == NULL ? PrivateFile->FileName : FileName, &buf) < 0) {
return EFI_DEVICE_ERROR;
}
Status = EFI_SUCCESS;
Info = Buffer;
ZeroMem (Info, ResultSize);
Info->Size = ResultSize;
Info->FileSize = buf.st_size;
Info->PhysicalSize = MultU64x32 (buf.st_blocks, buf.st_blksize);
PosixSystemTimeToEfiTime (buf.st_ctime, &Info->CreateTime);
PosixSystemTimeToEfiTime (buf.st_atime, &Info->LastAccessTime);
PosixSystemTimeToEfiTime (buf.st_mtime, &Info->ModificationTime);
if (!(buf.st_mode & S_IWUSR)) {
Info->Attribute |= EFI_FILE_READ_ONLY;
}
if (S_ISDIR(buf.st_mode)) {
Info->Attribute |= EFI_FILE_DIRECTORY;
}
BufferFileName = (CHAR16 *)((CHAR8 *) Buffer + Size);
while (*RealFileName) {
*BufferFileName++ = *RealFileName++;
}
*BufferFileName = 0;
*BufferSize = ResultSize;
return Status;
}
BOOLEAN
IsZero (
IN VOID *Buffer,
IN UINTN Length
)
{
if (Buffer == NULL || Length == 0) {
return FALSE;
}
if (*(UINT8 *) Buffer != 0) {
return FALSE;
}
if (Length > 1) {
if (!CompareMem (Buffer, (UINT8 *) Buffer + 1, Length - 1)) {
return FALSE;
}
}
return TRUE;
}
/**
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
PosixFileOpen (
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
{
EFI_FILE_PROTOCOL *Root;
EMU_EFI_FILE_PRIVATE *PrivateFile;
EMU_EFI_FILE_PRIVATE *NewPrivateFile;
EMU_SIMPLE_FILE_SYSTEM_PRIVATE *PrivateRoot;
EFI_STATUS Status;
CHAR16 *Src;
char *Dst;
CHAR8 *RealFileName;
char *ParseFileName;
char *GuardPointer;
CHAR8 TempChar;
UINTN Count;
BOOLEAN TrailingDash;
BOOLEAN LoopFinish;
UINTN InfoSize;
EFI_FILE_INFO *Info;
struct stat finfo;
int res;
UINTN Size;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
PrivateRoot = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (PrivateFile->SimpleFileSystem);
NewPrivateFile = NULL;
Status = EFI_OUT_OF_RESOURCES;
//
// BUGBUG: assume an open of root
// if current location, return current data
//
TrailingDash = FALSE;
if ((StrCmp (FileName, L"\\") == 0) ||
(StrCmp (FileName, L".") == 0 && PrivateFile->IsRootDirectory)) {
OpenRoot:
Status = PosixOpenVolume (PrivateFile->SimpleFileSystem, &Root);
NewPrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (Root);
goto Done;
}
if (FileName[StrLen (FileName) - 1] == L'\\') {
TrailingDash = TRUE;
FileName[StrLen (FileName) - 1] = 0;
}
//
// Attempt to open the file
//
NewPrivateFile = malloc (sizeof (EMU_EFI_FILE_PRIVATE));
if (NewPrivateFile == NULL) {
goto Done;
}
CopyMem (NewPrivateFile, PrivateFile, sizeof (EMU_EFI_FILE_PRIVATE));
Size = AsciiStrSize (PrivateFile->FileName) + 1 + StrLen (FileName) + 1;
NewPrivateFile->FileName = malloc (Size);
if (NewPrivateFile->FileName == NULL) {
goto Done;
}
if (*FileName == L'\\') {
AsciiStrCpyS (NewPrivateFile->FileName, Size, PrivateRoot->FilePath);
// Skip first '\'.
Src = FileName + 1;
} else {
AsciiStrCpyS (NewPrivateFile->FileName, Size, PrivateFile->FileName);
Src = FileName;
}
Dst = NewPrivateFile->FileName + AsciiStrLen (NewPrivateFile->FileName);
GuardPointer = NewPrivateFile->FileName + AsciiStrLen (PrivateRoot->FilePath);
*Dst++ = '/';
// Convert unicode to ascii and '\' to '/'
while (*Src) {
if (*Src == '\\') {
*Dst++ = '/';
} else {
*Dst++ = *Src;
}
Src++;
}
*Dst = 0;
//
// Get rid of . and .., except leading . or ..
//
//
// GuardPointer protect simplefilesystem root path not be destroyed
//
LoopFinish = FALSE;
while (!LoopFinish) {
LoopFinish = TRUE;
for (ParseFileName = GuardPointer; *ParseFileName; ParseFileName++) {
if (*ParseFileName == '.' &&
(*(ParseFileName + 1) == 0 || *(ParseFileName + 1) == '/') &&
*(ParseFileName - 1) == '/'
) {
//
// cut /.
//
CutPrefix (ParseFileName - 1, 2);
LoopFinish = FALSE;
break;
}
if (*ParseFileName == '.' &&
*(ParseFileName + 1) == '.' &&
(*(ParseFileName + 2) == 0 || *(ParseFileName + 2) == '/') &&
*(ParseFileName - 1) == '/'
) {
ParseFileName--;
Count = 3;
while (ParseFileName != GuardPointer) {
ParseFileName--;
Count++;
if (*ParseFileName == '/') {
break;
}
}
//
// cut /.. and its left directory
//
CutPrefix (ParseFileName, Count);
LoopFinish = FALSE;
break;
}
}
}
if (AsciiStrCmp (NewPrivateFile->FileName, PrivateRoot->FilePath) == 0) {
NewPrivateFile->IsRootDirectory = TRUE;
free (NewPrivateFile->FileName);
free (NewPrivateFile);
goto OpenRoot;
}
RealFileName = NewPrivateFile->FileName + AsciiStrLen(NewPrivateFile->FileName) - 1;
while (RealFileName > NewPrivateFile->FileName && *RealFileName != '/') {
RealFileName--;
}
TempChar = *(RealFileName - 1);
*(RealFileName - 1) = 0;
*(RealFileName - 1) = TempChar;
//
// Test whether file or directory
//
NewPrivateFile->IsRootDirectory = FALSE;
NewPrivateFile->fd = -1;
NewPrivateFile->Dir = NULL;
if (OpenMode & EFI_FILE_MODE_CREATE) {
if (Attributes & EFI_FILE_DIRECTORY) {
NewPrivateFile->IsDirectoryPath = TRUE;
} else {
NewPrivateFile->IsDirectoryPath = FALSE;
}
} else {
res = stat (NewPrivateFile->FileName, &finfo);
if (res == 0 && S_ISDIR(finfo.st_mode)) {
NewPrivateFile->IsDirectoryPath = TRUE;
} else {
NewPrivateFile->IsDirectoryPath = FALSE;
}
}
if (OpenMode & EFI_FILE_MODE_WRITE) {
NewPrivateFile->IsOpenedByRead = FALSE;
} else {
NewPrivateFile->IsOpenedByRead = TRUE;
}
Status = EFI_SUCCESS;
//
// deal with directory
//
if (NewPrivateFile->IsDirectoryPath) {
if ((OpenMode & EFI_FILE_MODE_CREATE)) {
//
// Create a directory
//
if (mkdir (NewPrivateFile->FileName, 0777) != 0) {
if (errno != EEXIST) {
//free (TempFileName);
Status = EFI_ACCESS_DENIED;
goto Done;
}
}
}
NewPrivateFile->Dir = opendir (NewPrivateFile->FileName);
if (NewPrivateFile->Dir == NULL) {
if (errno == EACCES) {
Status = EFI_ACCESS_DENIED;
} else {
Status = EFI_NOT_FOUND;
}
goto Done;
}
} else {
//
// deal with file
//
NewPrivateFile->fd = open (
NewPrivateFile->FileName,
((OpenMode & EFI_FILE_MODE_CREATE) ? O_CREAT : 0) | (NewPrivateFile->IsOpenedByRead ? O_RDONLY : O_RDWR),
0666
);
if (NewPrivateFile->fd < 0) {
if (errno == ENOENT) {
Status = EFI_NOT_FOUND;
} else {
Status = EFI_ACCESS_DENIED;
}
}
}
if ((OpenMode & EFI_FILE_MODE_CREATE) && Status == EFI_SUCCESS) {
//
// Set the attribute
//
InfoSize = 0;
Info = NULL;
Status = PosixFileGetInfo (&NewPrivateFile->EfiFile, &gEfiFileInfoGuid, &InfoSize, Info);
if (Status != EFI_BUFFER_TOO_SMALL) {
Status = EFI_DEVICE_ERROR;
goto Done;
}
Info = malloc (InfoSize);
if (Info == NULL) {
goto Done;
}
Status = PosixFileGetInfo (&NewPrivateFile->EfiFile, &gEfiFileInfoGuid, &InfoSize, Info);
if (EFI_ERROR (Status)) {
goto Done;
}
Info->Attribute = Attributes;
PosixFileSetInfo (&NewPrivateFile->EfiFile, &gEfiFileInfoGuid, InfoSize, Info);
free (Info);
}
Done: ;
if (TrailingDash) {
FileName[StrLen (FileName) + 1] = 0;
FileName[StrLen (FileName)] = L'\\';
}
if (EFI_ERROR (Status)) {
if (NewPrivateFile) {
if (NewPrivateFile->FileName) {
free (NewPrivateFile->FileName);
}
free (NewPrivateFile);
}
} else {
*NewHandle = &NewPrivateFile->EfiFile;
}
return Status;
}
/**
Close the file handle
@param This Protocol instance pointer.
@retval EFI_SUCCESS The device was opened.
**/
EFI_STATUS
PosixFileCLose (
IN EFI_FILE_PROTOCOL *This
)
{
EMU_EFI_FILE_PRIVATE *PrivateFile;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
if (PrivateFile->fd >= 0) {
close (PrivateFile->fd);
}
if (PrivateFile->Dir != NULL) {
closedir (PrivateFile->Dir);
}
PrivateFile->fd = -1;
PrivateFile->Dir = NULL;
if (PrivateFile->FileName) {
free (PrivateFile->FileName);
}
free (PrivateFile);
return EFI_SUCCESS;
}
/**
Close and delete the file handle.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The device was opened.
@retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not deleted.
**/
EFI_STATUS
PosixFileDelete (
IN EFI_FILE_PROTOCOL *This
)
{
EFI_STATUS Status;
EMU_EFI_FILE_PRIVATE *PrivateFile;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
Status = EFI_WARN_DELETE_FAILURE;
if (PrivateFile->IsDirectoryPath) {
if (PrivateFile->Dir != NULL) {
closedir (PrivateFile->Dir);
PrivateFile->Dir = NULL;
}
if (rmdir (PrivateFile->FileName) == 0) {
Status = EFI_SUCCESS;
}
} else {
close (PrivateFile->fd);
PrivateFile->fd = -1;
if (!PrivateFile->IsOpenedByRead) {
if (!unlink (PrivateFile->FileName)) {
Status = EFI_SUCCESS;
}
}
}
free (PrivateFile->FileName);
free (PrivateFile);
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
PosixFileRead (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EMU_EFI_FILE_PRIVATE *PrivateFile;
EFI_STATUS Status;
int Res;
UINTN Size;
UINTN NameSize;
UINTN ResultSize;
CHAR8 *FullFileName;
UINTN FullFileNameSize;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
if (!PrivateFile->IsDirectoryPath) {
if (PrivateFile->fd < 0) {
Status = EFI_DEVICE_ERROR;
goto Done;
}
Res = read (PrivateFile->fd, Buffer, *BufferSize);
if (Res < 0) {
Status = EFI_DEVICE_ERROR;
goto Done;
}
*BufferSize = Res;
Status = EFI_SUCCESS;
goto Done;
}
//
// Read on a directory.
//
if (PrivateFile->Dir == NULL) {
Status = EFI_DEVICE_ERROR;
goto Done;
}
if (PrivateFile->Dirent == NULL) {
PrivateFile->Dirent = readdir (PrivateFile->Dir);
if (PrivateFile->Dirent == NULL) {
*BufferSize = 0;
Status = EFI_SUCCESS;
goto Done;
}
}
Size = SIZE_OF_EFI_FILE_INFO;
NameSize = AsciiStrLen (PrivateFile->Dirent->d_name) + 1;
ResultSize = Size + 2 * NameSize;
if (*BufferSize < ResultSize) {
*BufferSize = ResultSize;
Status = EFI_BUFFER_TOO_SMALL;
goto Done;
}
Status = EFI_SUCCESS;
*BufferSize = ResultSize;
FullFileNameSize = AsciiStrLen(PrivateFile->FileName) + 1 + NameSize;
FullFileName = malloc (FullFileNameSize);
if (FullFileName == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
AsciiStrCpyS (FullFileName, FullFileNameSize, PrivateFile->FileName);
AsciiStrCatS (FullFileName, FullFileNameSize, "/");
AsciiStrCatS (FullFileName, FullFileNameSize, PrivateFile->Dirent->d_name);
Status = UnixSimpleFileSystemFileInfo (
PrivateFile,
FullFileName,
BufferSize,
Buffer
);
free (FullFileName);
PrivateFile->Dirent = NULL;
Done:
return Status;
}
/**
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
PosixFileWrite (
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
{
EMU_EFI_FILE_PRIVATE *PrivateFile;
int Res;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
if (PrivateFile->fd < 0) {
return EFI_DEVICE_ERROR;
}
if (PrivateFile->IsDirectoryPath) {
return EFI_UNSUPPORTED;
}
if (PrivateFile->IsOpenedByRead) {
return EFI_ACCESS_DENIED;
}
Res = write (PrivateFile->fd, Buffer, *BufferSize);
if (Res == (UINTN)-1) {
return ErrnoToEfiStatus ();
}
*BufferSize = Res;
return EFI_SUCCESS;
}
/**
Set a files current position
@param This Protocol instance pointer.
@param Position Byte position from the start of the file.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open.
**/
EFI_STATUS
PosixFileSetPossition (
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
)
{
EMU_EFI_FILE_PRIVATE *PrivateFile;
off_t Pos;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
if (PrivateFile->IsDirectoryPath) {
if (Position != 0) {
return EFI_UNSUPPORTED;
}
if (PrivateFile->Dir == NULL) {
return EFI_DEVICE_ERROR;
}
rewinddir (PrivateFile->Dir);
return EFI_SUCCESS;
} else {
if (Position == (UINT64) -1) {
Pos = lseek (PrivateFile->fd, 0, SEEK_END);
} else {
Pos = lseek (PrivateFile->fd, Position, SEEK_SET);
}
if (Pos == (off_t)-1) {
return ErrnoToEfiStatus ();
}
return EFI_SUCCESS;
}
}
/**
Get a file's current position
@param This Protocol instance pointer.
@param Position Byte position from the start of the file.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open..
**/
EFI_STATUS
PosixFileGetPossition (
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
)
{
EFI_STATUS Status;
EMU_EFI_FILE_PRIVATE *PrivateFile;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
if (PrivateFile->IsDirectoryPath) {
Status = EFI_UNSUPPORTED;
} else {
*Position = (UINT64)lseek (PrivateFile->fd, 0, SEEK_CUR);
Status = (*Position == (UINT64) -1) ? ErrnoToEfiStatus () : 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
PosixFileGetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
{
EFI_STATUS Status;
EMU_EFI_FILE_PRIVATE *PrivateFile;
EFI_FILE_SYSTEM_INFO *FileSystemInfoBuffer;
int UnixStatus;
EMU_SIMPLE_FILE_SYSTEM_PRIVATE *PrivateRoot;
struct statfs buf;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
PrivateRoot = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (PrivateFile->SimpleFileSystem);
Status = EFI_SUCCESS;
if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {
Status = UnixSimpleFileSystemFileInfo (PrivateFile, NULL, BufferSize, Buffer);
} else if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
if (*BufferSize < SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel)) {
*BufferSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel);
return EFI_BUFFER_TOO_SMALL;
}
UnixStatus = statfs (PrivateFile->FileName, &buf);
if (UnixStatus < 0) {
return EFI_DEVICE_ERROR;
}
FileSystemInfoBuffer = (EFI_FILE_SYSTEM_INFO *) Buffer;
FileSystemInfoBuffer->Size = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel);
FileSystemInfoBuffer->ReadOnly = FALSE;
//
// Succeeded
//
FileSystemInfoBuffer->VolumeSize = MultU64x32 (buf.f_blocks, buf.f_bsize);
FileSystemInfoBuffer->FreeSpace = MultU64x32 (buf.f_bavail, buf.f_bsize);
FileSystemInfoBuffer->BlockSize = buf.f_bsize;
StrCpyS (
(CHAR16 *) FileSystemInfoBuffer->VolumeLabel,
(*BufferSize - SIZE_OF_EFI_FILE_SYSTEM_INFO) / sizeof (CHAR16),
PrivateRoot->VolumeLabel
);
*BufferSize = SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel);
} else if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
if (*BufferSize < StrSize (PrivateRoot->VolumeLabel)) {
*BufferSize = StrSize (PrivateRoot->VolumeLabel);
return EFI_BUFFER_TOO_SMALL;
}
StrCpyS (
(CHAR16 *) Buffer,
*BufferSize / sizeof (CHAR16),
PrivateRoot->VolumeLabel
);
*BufferSize = StrSize (PrivateRoot->VolumeLabel);
}
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 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.
**/
EFI_STATUS
PosixFileSetInfo (
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
)
{
EMU_SIMPLE_FILE_SYSTEM_PRIVATE *PrivateRoot;
EMU_EFI_FILE_PRIVATE *PrivateFile;
EFI_FILE_INFO *OldFileInfo;
EFI_FILE_INFO *NewFileInfo;
EFI_STATUS Status;
UINTN OldInfoSize;
mode_t NewAttr;
struct stat OldAttr;
CHAR8 *OldFileName;
CHAR8 *NewFileName;
CHAR8 *CharPointer;
BOOLEAN AttrChangeFlag;
BOOLEAN NameChangeFlag;
BOOLEAN SizeChangeFlag;
BOOLEAN TimeChangeFlag;
struct tm NewLastAccessSystemTime;
struct tm NewLastWriteSystemTime;
EFI_FILE_SYSTEM_INFO *NewFileSystemInfo;
CHAR8 *AsciiFilePtr;
CHAR16 *UnicodeFilePtr;
int UnixStatus;
struct utimbuf Utime;
UINTN Size;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
PrivateRoot = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_DATA_FROM_THIS (PrivateFile->SimpleFileSystem);
errno = 0;
Status = EFI_UNSUPPORTED;
OldFileInfo = NewFileInfo = NULL;
OldFileName = NewFileName = NULL;
AttrChangeFlag = NameChangeFlag = SizeChangeFlag = TimeChangeFlag = FALSE;
//
// Set file system information.
//
if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
if (BufferSize < (SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (PrivateRoot->VolumeLabel))) {
Status = EFI_BAD_BUFFER_SIZE;
goto Done;
}
NewFileSystemInfo = (EFI_FILE_SYSTEM_INFO *) Buffer;
free (PrivateRoot->VolumeLabel);
PrivateRoot->VolumeLabel = malloc (StrSize (NewFileSystemInfo->VolumeLabel));
if (PrivateRoot->VolumeLabel == NULL) {
goto Done;
}
StrCpyS (
PrivateRoot->VolumeLabel,
StrSize (NewFileSystemInfo->VolumeLabel) / sizeof (CHAR16),
NewFileSystemInfo->VolumeLabel
);
Status = EFI_SUCCESS;
goto Done;
}
//
// Set volume label information.
//
if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
if (BufferSize < StrSize (PrivateRoot->VolumeLabel)) {
Status = EFI_BAD_BUFFER_SIZE;
goto Done;
}
StrCpyS (
PrivateRoot->VolumeLabel,
StrSize (PrivateRoot->VolumeLabel) / sizeof (CHAR16),
(CHAR16 *) Buffer
);
Status = EFI_SUCCESS;
goto Done;
}
if (!CompareGuid (InformationType, &gEfiFileInfoGuid)) {
Status = EFI_UNSUPPORTED;
goto Done;
}
if (BufferSize < SIZE_OF_EFI_FILE_INFO) {
Status = EFI_BAD_BUFFER_SIZE;
goto Done;
}
//
// Set file/directory information.
//
//
// Check for invalid set file information parameters.
//
NewFileInfo = (EFI_FILE_INFO *) Buffer;
if (NewFileInfo->Size <= sizeof (EFI_FILE_INFO) ||
(NewFileInfo->Attribute &~(EFI_FILE_VALID_ATTR)) ||
(sizeof (UINTN) == 4 && NewFileInfo->Size > 0xFFFFFFFF)
) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
//
// Get current file information so we can determine what kind
// of change request this is.
//
OldInfoSize = 0;
Status = UnixSimpleFileSystemFileInfo (PrivateFile, NULL, &OldInfoSize, NULL);
if (Status != EFI_BUFFER_TOO_SMALL) {
Status = EFI_DEVICE_ERROR;
goto Done;
}
OldFileInfo = malloc (OldInfoSize);
if (OldFileInfo == NULL) {
goto Done;
}
Status = UnixSimpleFileSystemFileInfo (PrivateFile, NULL, &OldInfoSize, OldFileInfo);
if (EFI_ERROR (Status)) {
goto Done;
}
OldFileName = malloc (AsciiStrSize (PrivateFile->FileName));
if (OldFileInfo == NULL) {
goto Done;
}
AsciiStrCpyS (
OldFileName,
AsciiStrSize (PrivateFile->FileName),
PrivateFile->FileName
);
//
// Make full pathname from new filename and rootpath.
//
if (NewFileInfo->FileName[0] == '\\') {
Size = AsciiStrLen (PrivateRoot->FilePath) + 1 + StrLen (NewFileInfo->FileName) + 1;
NewFileName = malloc (Size);
if (NewFileName == NULL) {
goto Done;
}
AsciiStrCpyS (NewFileName, Size, PrivateRoot->FilePath);
AsciiFilePtr = NewFileName + AsciiStrLen(NewFileName);
UnicodeFilePtr = NewFileInfo->FileName + 1;
*AsciiFilePtr++ ='/';
} else {
Size = AsciiStrLen (PrivateFile->FileName) + 2 + StrLen (NewFileInfo->FileName) + 1;
NewFileName = malloc (Size);
if (NewFileName == NULL) {
goto Done;
}
AsciiStrCpyS (NewFileName, Size, PrivateRoot->FilePath);
AsciiFilePtr = NewFileName + AsciiStrLen(NewFileName);
if ((AsciiFilePtr[-1] != '/') && (NewFileInfo->FileName[0] != '/')) {
// make sure there is a / between Root FilePath and NewFileInfo Filename
AsciiFilePtr[0] = '/';
AsciiFilePtr[1] = '\0';
AsciiFilePtr++;
}
UnicodeFilePtr = NewFileInfo->FileName;
}
// Convert to ascii.
while (*UnicodeFilePtr) {
*AsciiFilePtr++ = *UnicodeFilePtr++;
}
*AsciiFilePtr = 0;
//
// Is there an attribute change request?
//
if (NewFileInfo->Attribute != OldFileInfo->Attribute) {
if ((NewFileInfo->Attribute & EFI_FILE_DIRECTORY) != (OldFileInfo->Attribute & EFI_FILE_DIRECTORY)) {
Status = EFI_INVALID_PARAMETER;
goto Done;
}
AttrChangeFlag = TRUE;
}
//
// Is there a name change request?
// bugbug: - Should really use EFI_UNICODE_COLLATION_PROTOCOL
//
if (StrCmp (NewFileInfo->FileName, OldFileInfo->FileName)) {
NameChangeFlag = TRUE;
}
//
// Is there a size change request?
//
if (NewFileInfo->FileSize != OldFileInfo->FileSize) {
SizeChangeFlag = TRUE;
}
//
// Is there a time stamp change request?
//
if (!IsZero (&NewFileInfo->CreateTime, sizeof (EFI_TIME)) &&
CompareMem (&NewFileInfo->CreateTime, &OldFileInfo->CreateTime, sizeof (EFI_TIME))
) {
TimeChangeFlag = TRUE;
} else if (!IsZero (&NewFileInfo->LastAccessTime, sizeof (EFI_TIME)) &&
CompareMem (&NewFileInfo->LastAccessTime, &OldFileInfo->LastAccessTime, sizeof (EFI_TIME))
) {
TimeChangeFlag = TRUE;
} else if (!IsZero (&NewFileInfo->ModificationTime, sizeof (EFI_TIME)) &&
CompareMem (&NewFileInfo->ModificationTime, &OldFileInfo->ModificationTime, sizeof (EFI_TIME))
) {
TimeChangeFlag = TRUE;
}
//
// All done if there are no change requests being made.
//
if (!(AttrChangeFlag || NameChangeFlag || SizeChangeFlag || TimeChangeFlag)) {
Status = EFI_SUCCESS;
goto Done;
}
//
// Set file or directory information.
//
if (stat (OldFileName, &OldAttr) != 0) {
Status = ErrnoToEfiStatus ();
goto Done;
}
//
// Name change.
//
if (NameChangeFlag) {
//
// Close the handles first
//
if (PrivateFile->IsOpenedByRead) {
Status = EFI_ACCESS_DENIED;
goto Done;
}
for (CharPointer = NewFileName; *CharPointer != 0 && *CharPointer != L'/'; CharPointer++) {
}
if (*CharPointer != 0) {
Status = EFI_ACCESS_DENIED;
goto Done;
}
UnixStatus = rename (OldFileName, NewFileName);
if (UnixStatus == 0) {
//
// modify file name
//
free (PrivateFile->FileName);
PrivateFile->FileName = malloc (AsciiStrSize (NewFileName));
if (PrivateFile->FileName == NULL) {
goto Done;
}
AsciiStrCpyS (
PrivateFile->FileName,
AsciiStrSize (NewFileName),
NewFileName
);
} else {
Status = EFI_DEVICE_ERROR;
goto Done;
}
}
//
// Size change
//
if (SizeChangeFlag) {
if (PrivateFile->IsDirectoryPath) {
Status = EFI_UNSUPPORTED;
goto Done;
}
if (PrivateFile->IsOpenedByRead || OldFileInfo->Attribute & EFI_FILE_READ_ONLY) {
Status = EFI_ACCESS_DENIED;
goto Done;
}
if (ftruncate (PrivateFile->fd, NewFileInfo->FileSize) != 0) {
Status = ErrnoToEfiStatus ();
goto Done;
}
}
//
// Time change
//
if (TimeChangeFlag) {
NewLastAccessSystemTime.tm_year = NewFileInfo->LastAccessTime.Year;
NewLastAccessSystemTime.tm_mon = NewFileInfo->LastAccessTime.Month;
NewLastAccessSystemTime.tm_mday = NewFileInfo->LastAccessTime.Day;
NewLastAccessSystemTime.tm_hour = NewFileInfo->LastAccessTime.Hour;
NewLastAccessSystemTime.tm_min = NewFileInfo->LastAccessTime.Minute;
NewLastAccessSystemTime.tm_sec = NewFileInfo->LastAccessTime.Second;
NewLastAccessSystemTime.tm_isdst = 0;
Utime.actime = mktime (&NewLastAccessSystemTime);
NewLastWriteSystemTime.tm_year = NewFileInfo->ModificationTime.Year;
NewLastWriteSystemTime.tm_mon = NewFileInfo->ModificationTime.Month;
NewLastWriteSystemTime.tm_mday = NewFileInfo->ModificationTime.Day;
NewLastWriteSystemTime.tm_hour = NewFileInfo->ModificationTime.Hour;
NewLastWriteSystemTime.tm_min = NewFileInfo->ModificationTime.Minute;
NewLastWriteSystemTime.tm_sec = NewFileInfo->ModificationTime.Second;
NewLastWriteSystemTime.tm_isdst = 0;
Utime.modtime = mktime (&NewLastWriteSystemTime);
if (Utime.actime == (time_t)-1 || Utime.modtime == (time_t)-1) {
goto Done;
}
if (utime (PrivateFile->FileName, &Utime) == -1) {
Status = ErrnoToEfiStatus ();
goto Done;
}
}
//
// No matter about AttrChangeFlag, Attribute must be set.
// Because operation before may cause attribute change.
//
NewAttr = OldAttr.st_mode;
if (NewFileInfo->Attribute & EFI_FILE_READ_ONLY) {
NewAttr &= ~(S_IRUSR | S_IRGRP | S_IROTH);
} else {
NewAttr |= S_IRUSR;
}
if (chmod (NewFileName, NewAttr) != 0) {
Status = ErrnoToEfiStatus ();
}
Done:
if (OldFileInfo != NULL) {
free (OldFileInfo);
}
if (OldFileName != NULL) {
free (OldFileName);
}
if (NewFileName != NULL) {
free (NewFileName);
}
return Status;
}
/**
Flush data back for the file handle.
@param This Protocol instance pointer.
@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_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
PosixFileFlush (
IN EFI_FILE_PROTOCOL *This
)
{
EMU_EFI_FILE_PRIVATE *PrivateFile;
PrivateFile = EMU_EFI_FILE_PRIVATE_DATA_FROM_THIS (This);
if (PrivateFile->IsDirectoryPath) {
return EFI_UNSUPPORTED;
}
if (PrivateFile->IsOpenedByRead) {
return EFI_ACCESS_DENIED;
}
if (PrivateFile->fd < 0) {
return EFI_DEVICE_ERROR;
}
if (fsync (PrivateFile->fd) != 0) {
return ErrnoToEfiStatus ();
}
return EFI_SUCCESS;
}
EFI_STATUS
PosixFileSystmeThunkOpen (
IN EMU_IO_THUNK_PROTOCOL *This
)
{
EMU_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
UINTN i;
if (This->Private != NULL) {
return EFI_ALREADY_STARTED;
}
if (!CompareGuid (This->Protocol, &gEfiSimpleFileSystemProtocolGuid)) {
return EFI_UNSUPPORTED;
}
Private = malloc (sizeof (EMU_SIMPLE_FILE_SYSTEM_PRIVATE));
if (Private == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Private->FilePath = malloc (StrLen (This->ConfigString) + 1);
if (Private->FilePath == NULL) {
free (Private);
return EFI_OUT_OF_RESOURCES;
}
// Convert Unicode to Ascii
for (i = 0; This->ConfigString[i] != 0; i++) {
Private->FilePath[i] = This->ConfigString[i];
}
Private->FilePath[i] = 0;
Private->VolumeLabel = malloc (StrSize (L"EFI_EMULATED"));
if (Private->VolumeLabel == NULL) {
free (Private->FilePath);
free (Private);
return EFI_OUT_OF_RESOURCES;
}
StrCpyS (
Private->VolumeLabel,
StrSize (L"EFI_EMULATED") / sizeof (CHAR16),
L"EFI_EMULATED"
);
Private->Signature = EMU_SIMPLE_FILE_SYSTEM_PRIVATE_SIGNATURE;
Private->Thunk = This;
CopyMem (&Private->SimpleFileSystem, &gPosixFileSystemProtocol, sizeof (Private->SimpleFileSystem));
Private->FileHandlesOpen = FALSE;
This->Interface = &Private->SimpleFileSystem;
This->Private = Private;
return EFI_SUCCESS;
}
EFI_STATUS
PosixFileSystmeThunkClose (
IN EMU_IO_THUNK_PROTOCOL *This
)
{
EMU_SIMPLE_FILE_SYSTEM_PRIVATE *Private;
if (!CompareGuid (This->Protocol, &gEfiSimpleFileSystemProtocolGuid)) {
return EFI_UNSUPPORTED;
}
Private = This->Private;
if (Private->FileHandlesOpen) {
//
// Close only supported if all the EFI_FILE_HANDLEs have been closed.
//
return EFI_NOT_READY;
}
if (This->Private != NULL) {
if (Private->VolumeLabel != NULL) {
free (Private->VolumeLabel);
}
free (This->Private);
This->Private = NULL;
}
return EFI_SUCCESS;
}
EMU_IO_THUNK_PROTOCOL gPosixFileSystemThunkIo = {
&gEfiSimpleFileSystemProtocolGuid,
NULL,
NULL,
0,
GasketPosixFileSystmeThunkOpen,
GasketPosixFileSystmeThunkClose,
NULL
};
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