sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Files
1bb390f1375b51cdc50fce0a763c38fad7748120
system76-edk2/EmulatorPkg/Unix/Host/PosixFileSystem.c
Anderw Fish e320062406 EmulatorPkg: Unix: Fix uninitiailzed variable bug. 
clang warns on this error.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anderw Fish <afish@apple.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15981 6f19259b-4bc3-4df7-8a09-765794883524
2014-08-29 18:45:26 +00:00

1557 lines
40 KiB
C
Raw Blame History

/*++ @file
POSIX Pthreads to emulate APs and implement threads
Copyright (c) 2011, Apple Inc. All rights reserved.
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 "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;
}
AsciiStrCpy (PrivateFile->FileName, 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;
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;
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));
NewPrivateFile->FileName = malloc (AsciiStrSize (PrivateFile->FileName) + 1 + StrLen (FileName) + 1);
if (NewPrivateFile->FileName == NULL) {
goto Done;
}
if (*FileName == L'\\') {
AsciiStrCpy (NewPrivateFile->FileName, PrivateRoot->FilePath);
// Skip first '\'.
Src = FileName + 1;
} else {
AsciiStrCpy (NewPrivateFile->FileName, 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;
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;
FullFileName = malloc (AsciiStrLen(PrivateFile->FileName) + 1 + NameSize);
if (FullFileName == NULL) {
Status = EFI_OUT_OF_RESOURCES;
goto Done;
}
AsciiStrCpy (FullFileName, PrivateFile->FileName);
AsciiStrCat (FullFileName, "/");
AsciiStrCat (FullFileName, 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;
StrCpy ((CHAR16 *) FileSystemInfoBuffer->VolumeLabel, 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;
}
StrCpy ((CHAR16 *) Buffer, 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;
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;
}
StrCpy (PrivateRoot->VolumeLabel, 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;
}
StrCpy (PrivateRoot->VolumeLabel, (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;
}
AsciiStrCpy (OldFileName, PrivateFile->FileName);
//
// Make full pathname from new filename and rootpath.
//
if (NewFileInfo->FileName[0] == '\\') {
NewFileName = malloc (AsciiStrLen (PrivateRoot->FilePath) + 1 + StrLen (NewFileInfo->FileName) + 1);
if (NewFileName == NULL) {
goto Done;
}
AsciiStrCpy (NewFileName, PrivateRoot->FilePath);
AsciiFilePtr = NewFileName + AsciiStrLen(NewFileName);
UnicodeFilePtr = NewFileInfo->FileName + 1;
*AsciiFilePtr++ ='/';
} else {
NewFileName = malloc (AsciiStrLen (PrivateFile->FileName) + 2 + StrLen (NewFileInfo->FileName) + 1);
if (NewFileName == NULL) {
goto Done;
}
AsciiStrCpy (NewFileName, 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;
}
AsciiStrCpy (PrivateFile->FileName, 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;
}
StrCpy (Private->VolumeLabel, 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
};
Reference in New Issue View Git Blame Copy Permalink