diff options
Diffstat (limited to 'ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsDir.c')
| -rw-r--r-- | ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsDir.c | 429 |
1 files changed, 280 insertions, 149 deletions
diff --git a/ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsDir.c b/ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsDir.c index 835cdae18a..450a707f18 100644 --- a/ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsDir.c +++ b/ArmPlatformPkg/FileSystem/BootMonFs/BootMonFsDir.c @@ -28,6 +28,8 @@ OpenBootMonFsOpenVolume ( return EFI_DEVICE_ERROR;
}
+ Instance->RootFile->Info->Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;
+
*Root = &Instance->RootFile->File;
return EFI_SUCCESS;
@@ -114,6 +116,8 @@ BootMonFsOpenDirectory ( return EFI_UNSUPPORTED;
}
+
+STATIC
EFI_STATUS
GetFileSystemVolumeLabelInfo (
IN BOOTMON_FS_INSTANCE *Instance,
@@ -178,6 +182,7 @@ ComputeFreeSpace ( return MediaSize - (FileSizeSum + (Media->BlockSize + NumFiles));
}
+STATIC
EFI_STATUS
GetFilesystemInfo (
IN BOOTMON_FS_INSTANCE *Instance,
@@ -199,26 +204,19 @@ GetFilesystemInfo ( return Status;
}
+STATIC
EFI_STATUS
GetFileInfo (
- IN BOOTMON_FS_INSTANCE *Instance,
- IN BOOTMON_FS_FILE *File,
- IN OUT UINTN *BufferSize,
- OUT VOID *Buffer
+ IN BOOTMON_FS_INSTANCE *Instance,
+ IN BOOTMON_FS_FILE *File,
+ IN OUT UINTN *BufferSize,
+ OUT VOID *Buffer
)
{
- EFI_FILE_INFO *Info;
- UINTN ResultSize;
- UINTN NameSize;
- UINTN Index;
+ EFI_FILE_INFO *Info;
+ UINTN ResultSize;
- if (File == Instance->RootFile) {
- NameSize = 0;
- ResultSize = SIZE_OF_EFI_FILE_INFO + sizeof (CHAR16);
- } else {
- NameSize = AsciiStrLen (File->HwDescription.Footer.Filename) + 1;
- ResultSize = SIZE_OF_EFI_FILE_INFO + (NameSize * sizeof (CHAR16));
- }
+ ResultSize = SIZE_OF_EFI_FILE_INFO + StrSize (File->Info->FileName);
if (*BufferSize < ResultSize) {
*BufferSize = ResultSize;
@@ -227,24 +225,10 @@ GetFileInfo ( Info = Buffer;
- // Zero out the structure
- ZeroMem (Info, ResultSize);
-
- // Fill in the structure
+ CopyMem (Info, File->Info, ResultSize);
+ // Size of the information
Info->Size = ResultSize;
- if (File == Instance->RootFile) {
- Info->Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;
- Info->FileName[0] = L'\0';
- } else {
- Info->FileSize = BootMonFsGetImageLength (File);
- Info->PhysicalSize = BootMonFsGetPhysicalSize (File);
-
- for (Index = 0; Index < NameSize; Index++) {
- Info->FileName[Index] = File->HwDescription.Footer.Filename[Index];
- }
- }
-
*BufferSize = ResultSize;
return EFI_SUCCESS;
@@ -297,171 +281,253 @@ GetBootMonFsFileInfo ( return Status;
}
+/**
+ Set the name of a file.
+
+ This is a helper function for SetFileInfo().
+
+ @param[in] Instance A pointer to the description of the volume
+ the file belongs to.
+ @param[in] File A pointer to the description of the file.
+ @param[in] FileName A pointer to the new name of the file.
+
+ @retval EFI_SUCCESS The name was set.
+ @retval EFI_ACCESS_DENIED An attempt is made to change the name of a file
+ to a file that is already present.
+
+**/
STATIC
EFI_STATUS
SetFileName (
- IN BOOTMON_FS_FILE *File,
- IN CHAR16 *FileNameUnicode
+ IN BOOTMON_FS_INSTANCE *Instance,
+ IN BOOTMON_FS_FILE *File,
+ IN CONST CHAR16 *FileName
)
{
- CHAR8 *FileNameAscii;
- UINT16 SavedChar;
- UINTN FileNameSize;
- BOOTMON_FS_FILE *SameFile;
- EFI_STATUS Status;
+ CHAR16 TruncFileName[MAX_NAME_LENGTH];
+ CHAR8 AsciiFileName[MAX_NAME_LENGTH];
+ BOOTMON_FS_FILE *SameFile;
- // EFI Shell inserts '\' in front of the filename that must be stripped
- if (FileNameUnicode[0] == L'\\') {
- FileNameUnicode++;
+ // If the file path start with a \ strip it. The EFI Shell may
+ // insert a \ in front of the file name.
+ if (FileName[0] == L'\\') {
+ FileName++;
}
- //
- // Convert Unicode into Ascii
- //
- SavedChar = L'\0';
- FileNameSize = StrLen (FileNameUnicode) + 1;
- FileNameAscii = AllocatePool (FileNameSize * sizeof (CHAR8));
- if (FileNameAscii == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- // If Unicode string is too long then truncate it.
- if (FileNameSize > MAX_NAME_LENGTH) {
- SavedChar = FileNameUnicode[MAX_NAME_LENGTH - 1];
- FileNameUnicode[MAX_NAME_LENGTH - 1] = L'\0';
- }
- UnicodeStrToAsciiStr (FileNameUnicode, FileNameAscii);
- // If the unicode string was truncated then restore its original content.
- if (SavedChar != L'\0') {
- FileNameUnicode[MAX_NAME_LENGTH - 1] = SavedChar;
- }
-
- // If we're changing the file name
- if (AsciiStrCmp (FileNameAscii, File->HwDescription.Footer.Filename) == 0) {
- // No change to filename.
- Status = EFI_SUCCESS;
- } else if (!(File->OpenMode & EFI_FILE_MODE_WRITE)) {
- // You can only change the filename if you open the file for write.
- Status = EFI_ACCESS_DENIED;
- } else if (BootMonGetFileFromAsciiFileName (
- File->Instance,
- File->HwDescription.Footer.Filename,
- &SameFile) != EFI_NOT_FOUND) {
+
+ StrnCpy (TruncFileName, FileName, MAX_NAME_LENGTH - 1);
+ TruncFileName[MAX_NAME_LENGTH - 1] = 0;
+ UnicodeStrToAsciiStr (TruncFileName, AsciiFileName);
+
+ if (BootMonGetFileFromAsciiFileName (
+ File->Instance,
+ AsciiFileName,
+ &SameFile
+ ) != EFI_NOT_FOUND) {
// A file with that name already exists.
- Status = EFI_ACCESS_DENIED;
+ return EFI_ACCESS_DENIED;
} else {
// OK, change the filename.
- AsciiStrCpy (FileNameAscii, File->HwDescription.Footer.Filename);
- Status = EFI_SUCCESS;
+ AsciiStrToUnicodeStr (AsciiFileName, File->Info->FileName);
+ return EFI_SUCCESS;
}
-
- FreePool (FileNameAscii);
- return Status;
}
-// Set the file's size (NB "size", not "physical size"). If the change amounts
-// to an increase, simply do a write followed by a flush.
-// (This is a helper function for SetFileInfo.)
+/**
+ Set the size of a file.
+
+ This is a helper function for SetFileInfo().
+
+ @param[in] Instance A pointer to the description of the volume
+ the file belongs to.
+ @param[in] File A pointer to the description of the file.
+ @param[in] NewSize The requested new size for the file.
+
+ @retval EFI_SUCCESS The size was set.
+ @retval EFI_OUT_OF_RESOURCES An allocation needed to process the request failed.
+
+**/
STATIC
EFI_STATUS
SetFileSize (
- IN BOOTMON_FS_INSTANCE *Instance,
- IN BOOTMON_FS_FILE *BootMonFsFile,
- IN UINTN NewSize
+ IN BOOTMON_FS_INSTANCE *Instance,
+ IN BOOTMON_FS_FILE *BootMonFsFile,
+ IN UINTN NewSize
)
{
- UINT64 StoredPosition;
- EFI_STATUS Status;
- EFI_FILE_PROTOCOL *File;
- CHAR8 Buffer;
- UINTN BufferSize;
- UINT32 OldSize;
-
- OldSize = BootMonFsFile->HwDescription.Region[0].Size;
-
- if (OldSize == NewSize) {
- return EFI_SUCCESS;
- }
-
- Buffer = 0;
- BufferSize = sizeof (Buffer);
+ EFI_STATUS Status;
+ UINT32 OldSize;
+ LIST_ENTRY *RegionToFlushLink;
+ LIST_ENTRY *NextRegionToFlushLink;
+ BOOTMON_FS_FILE_REGION *Region;
+ EFI_FILE_PROTOCOL *File;
+ CHAR8 *Buffer;
+ UINTN BufferSize;
+ UINT64 StoredPosition;
- File = &BootMonFsFile->File;
+ OldSize = BootMonFsFile->Info->FileSize;
- if (!(BootMonFsFile->OpenMode & EFI_FILE_MODE_WRITE)) {
- return EFI_ACCESS_DENIED;
- }
+ //
+ // In case of file truncation, force the regions waiting for writing to
+ // not overflow the new size of the file.
+ //
+ if (NewSize < OldSize) {
+ for (RegionToFlushLink = GetFirstNode (&BootMonFsFile->RegionToFlushLink);
+ !IsNull (&BootMonFsFile->RegionToFlushLink, RegionToFlushLink);
+ )
+ {
+ NextRegionToFlushLink = GetNextNode (&BootMonFsFile->RegionToFlushLink, RegionToFlushLink);
+ Region = (BOOTMON_FS_FILE_REGION*)RegionToFlushLink;
+ if (Region->Offset > NewSize) {
+ RemoveEntryList (RegionToFlushLink);
+ FreePool (Region->Buffer);
+ FreePool (Region);
+ } else {
+ Region->Size = MIN (Region->Size, NewSize - Region->Offset);
+ }
+ RegionToFlushLink = NextRegionToFlushLink;
+ }
- if (NewSize <= OldSize) {
- OldSize = NewSize;
- } else {
+ } else if (NewSize > OldSize) {
// Increasing a file's size is potentially complicated as it may require
// moving the image description on media. The simplest way to do it is to
// seek past the end of the file (which is valid in UEFI) and perform a
// Write.
+ File = &BootMonFsFile->File;
// Save position
Status = File->GetPosition (File, &StoredPosition);
if (EFI_ERROR (Status)) {
return Status;
}
-
- Status = File->SetPosition (File, NewSize - 1);
+ // Set position at the end of the file
+ Status = File->SetPosition (File, OldSize);
if (EFI_ERROR (Status)) {
return Status;
}
- Status = File->Write (File, &BufferSize, &Buffer);
- if (EFI_ERROR (Status)) {
- return Status;
+
+ BufferSize = NewSize - OldSize;
+ Buffer = AllocateZeroPool (BufferSize);
+ if (Buffer == NULL) {
+ return EFI_OUT_OF_RESOURCES;
}
- // Restore saved position
- Status = File->SetPosition (File, NewSize - 1);
+ Status = File->Write (File, &BufferSize, Buffer);
+ FreePool (Buffer);
if (EFI_ERROR (Status)) {
return Status;
}
- Status = File->Flush (File);
+ // Restore saved position
+ Status = File->SetPosition (File, StoredPosition);
if (EFI_ERROR (Status)) {
return Status;
}
}
+
+ BootMonFsFile->Info->FileSize = NewSize;
+
return EFI_SUCCESS;
}
+/**
+ Set information about a file.
+
+ @param[in] Instance A pointer to the description of the volume
+ the file belongs to.
+ @param[in] File A pointer to the description of the file.
+ @param[in] Info A pointer to the file information to write.
+
+ @retval EFI_SUCCESS The information was set.
+ @retval EFI_ACCESS_DENIED An attempt is being made to change the
+ EFI_FILE_DIRECTORY Attribute.
+ @retval EFI_ACCESS_DENIED The file was opened in read-only mode and an
+ attempt is being made to modify a field other
+ than Attribute.
+ @retval EFI_ACCESS_DENIED An attempt is made to change the name of a file
+ to a file that is already present.
+ @retval EFI_WRITE_PROTECTED An attempt is being made to modify a read-only
+ attribute.
+ @retval EFI_OUT_OF_RESOURCES An allocation needed to process the request
+ failed.
+
+**/
+STATIC
EFI_STATUS
SetFileInfo (
- IN BOOTMON_FS_INSTANCE *Instance,
- IN BOOTMON_FS_FILE *File,
- IN UINTN BufferSize,
- IN EFI_FILE_INFO *Info
+ IN BOOTMON_FS_INSTANCE *Instance,
+ IN BOOTMON_FS_FILE *File,
+ IN EFI_FILE_INFO *Info
)
{
- EFI_STATUS Status;
+ EFI_STATUS Status;
+ BOOLEAN FileSizeIsDifferent;
+ BOOLEAN FileNameIsDifferent;
+ BOOLEAN TimeIsDifferent;
- Status = EFI_SUCCESS;
+ //
+ // A directory can not be changed to a file and a file can
+ // not be changed to a directory.
+ //
+ if ((Info->Attribute & EFI_FILE_DIRECTORY) !=
+ (File->Info->Attribute & EFI_FILE_DIRECTORY) ) {
+ return EFI_ACCESS_DENIED;
+ }
- // Note that a call to this function on a file opened read-only is only
- // invalid if it actually changes fields, so we don't immediately fail if the
- // OpenMode is wrong.
- // Also note that the only fields supported are filename and size, others are
- // ignored.
+ FileSizeIsDifferent = (Info->FileSize != File->Info->FileSize);
+ FileNameIsDifferent = (StrnCmp (
+ Info->FileName,
+ File->Info->FileName,
+ MAX_NAME_LENGTH - 1
+ ) != 0);
+ //
+ // Check if the CreateTime, LastAccess or ModificationTime
+ // have been changed. The file system does not support file
+ // timestamps thus the three times in "File->Info" are
+ // always equal to zero. The following comparison actually
+ // checks if all three times are still equal to 0 or not.
+ //
+ TimeIsDifferent = CompareMem (
+ &Info->CreateTime,
+ &File->Info->CreateTime,
+ 3 * sizeof (EFI_TIME)
+ ) != 0;
- if (File != Instance->RootFile) {
- if (!(File->OpenMode & EFI_FILE_MODE_WRITE)) {
+ //
+ // For a file opened in read-only mode, only the Attribute field can be
+ // modified. The root directory open mode is forced to read-only at opening
+ // thus the following test protects the root directory to be somehow modified.
+ //
+ if (File->OpenMode == EFI_FILE_MODE_READ) {
+ if (FileSizeIsDifferent || FileNameIsDifferent || TimeIsDifferent) {
return EFI_ACCESS_DENIED;
}
+ }
+
+ if (TimeIsDifferent) {
+ return EFI_WRITE_PROTECTED;
+ }
- Status = SetFileName (File, Info->FileName);
+ if (FileSizeIsDifferent) {
+ Status = SetFileSize (Instance, File, Info->FileSize);
if (EFI_ERROR (Status)) {
return Status;
}
+ }
- // Update file size
- Status = SetFileSize (Instance, File, Info->FileSize);
+ //
+ // Note down in RAM the Attribute field but we can not
+ // ask to store it in flash for the time being.
+ //
+ File->Info->Attribute = Info->Attribute;
+
+ if (FileNameIsDifferent) {
+ Status = SetFileName (Instance, File, Info->FileName);
if (EFI_ERROR (Status)) {
return Status;
}
}
- return Status;
+
+ return EFI_SUCCESS;
}
EFIAPI
@@ -477,11 +543,17 @@ BootMonFsGetInfo ( BOOTMON_FS_FILE *File;
BOOTMON_FS_INSTANCE *Instance;
- File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
- if (File == NULL) {
- return EFI_DEVICE_ERROR;
+ if ((This == NULL) ||
+ (InformationType == NULL) ||
+ (BufferSize == NULL) ||
+ ((Buffer == NULL) && (*BufferSize > 0)) ) {
+ return EFI_INVALID_PARAMETER;
}
+ File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
+ if (File->Info == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
Instance = File->Instance;
// If the instance has not been initialized yet then do it ...
@@ -509,6 +581,37 @@ BootMonFsGetInfo ( return Status;
}
+/**
+ Set information about a file or a volume.
+
+ @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that
+ is the file handle the information is for.
+ @param[in] InformationType The type identifier for the information being set :
+ EFI_FILE_INFO_ID or EFI_FILE_SYSTEM_INFO_ID or
+ EFI_FILE_SYSTEM_VOLUME_LABEL_ID
+ @param[in] BufferSize The size, in bytes, of Buffer.
+ @param[in] Buffer A pointer to the data buffer to write. The type of the
+ data inside the buffer is indicated by InformationType.
+
+ @retval EFI_SUCCESS The information was set.
+ @retval EFI_UNSUPPORTED The InformationType is not known.
+ @retval EFI_DEVICE_ERROR The last issued semi-hosting operation failed.
+ @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 InformationType is EFI_FILE_INFO_ID and
+ the file was opened in read-only mode and an
+ attempt is being made to modify a field other
+ than Attribute.
+ @retval EFI_WRITE_PROTECTED An attempt is being made to modify a read-only
+ attribute.
+ @retval EFI_BAD_BUFFER_SIZE The size of the buffer is lower than that indicated by
+ the data inside the buffer.
+ @retval EFI_OUT_OF_RESOURCES A allocation needed to process the request failed.
+ @retval EFI_INVALID_PARAMETER At least one of the parameters is invalid.
+
+**/
EFIAPI
EFI_STATUS
BootMonFsSetInfo (
@@ -518,28 +621,56 @@ BootMonFsSetInfo ( IN VOID *Buffer
)
{
- EFI_STATUS Status;
- BOOTMON_FS_FILE *File;
- BOOTMON_FS_INSTANCE *Instance;
+ BOOTMON_FS_FILE *File;
+ EFI_FILE_INFO *Info;
+ EFI_FILE_SYSTEM_INFO *SystemInfo;
+
+ if ((This == NULL) ||
+ (InformationType == NULL) ||
+ (Buffer == NULL) ) {
+ return EFI_INVALID_PARAMETER;
+ }
File = BOOTMON_FS_FILE_FROM_FILE_THIS (This);
- if (File == NULL) {
- return EFI_DEVICE_ERROR;
+ if (File->Info == NULL) {
+ return EFI_INVALID_PARAMETER;
}
- Instance = File->Instance;
+ if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {
+ Info = Buffer;
+ if (Info->Size < (SIZE_OF_EFI_FILE_INFO + StrSize (Info->FileName))) {
+ return EFI_INVALID_PARAMETER;
+ }
+ if (BufferSize < Info->Size) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+ return (SetFileInfo (File->Instance, File, Info));
+ }
- if (CompareGuid (InformationType, &gEfiFileInfoGuid) != 0) {
- Status = SetFileInfo (Instance, File, BufferSize, (EFI_FILE_INFO *) Buffer);
- } else {
- // The only writable field in the other two information types
- // (i.e. EFI_FILE_SYSTEM_INFO and EFI_FILE_SYSTEM_VOLUME_LABEL) is the
- // filesystem volume label. This can be retrieved with GetInfo, but it is
- // hard-coded into this driver, not stored on media.
- Status = EFI_UNSUPPORTED;
+ //
+ // The only writable field in the other two information types
+ // (i.e. EFI_FILE_SYSTEM_INFO and EFI_FILE_SYSTEM_VOLUME_LABEL) is the
+ // filesystem volume label. This can be retrieved with GetInfo, but it is
+ // hard-coded into this driver, not stored on media.
+ //
+
+ if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {
+ SystemInfo = Buffer;
+ if (SystemInfo->Size <
+ (SIZE_OF_EFI_FILE_SYSTEM_INFO + StrSize (SystemInfo->VolumeLabel))) {
+ return EFI_INVALID_PARAMETER;
+ }
+ if (BufferSize < SystemInfo->Size) {
+ return EFI_BAD_BUFFER_SIZE;
+ }
+ return EFI_WRITE_PROTECTED;
}
- return Status;
+ if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {
+ return EFI_WRITE_PROTECTED;
+ }
+
+ return EFI_UNSUPPORTED;
}
EFIAPI
|