#endif
-\f
+
_Function_class_(IRP_MJ_DIRECTORY_CONTROL)
_Function_class_(DRIVER_DISPATCH)
NTSTATUS
return Status;
}
-\f
+
_Requires_lock_held_(_Global_critical_region_)
NTSTATUS
FatCommonDirectoryControl (
return Status;
}
-\f
+
//
// Local Support Routine
//
PFILE_ID_BOTH_DIR_INFORMATION IdBothDirInfo;
PFILE_NAMES_INFORMATION NamesInfo;
-
+
PAGED_CODE();
//
// but UserDirectoryOpens. Also check that the filename is a valid
// UNICODE string.
//
-
+
if (FatDecodeFileObject( IrpSp->FileObject,
&Vcb,
&Dcb,
// order to update the search string in the Ccb. We may
// discover that we are not the initial query once we grab the Fcb
// and downgrade our status.
- //
- // If restartscan is set, we may be replacing the query template,
+ //
+ // If restartscan is set, we may be replacing the query template,
// so take the FCB exclusive to protect against multiple people
// changing the CCB at once.
//
// name.
//
- if (InitialQuery ||
+ if (InitialQuery ||
(RestartScan && UniArgFileName != NULL && UniArgFileName->Length != 0)) {
//
// If we're restarting the scan, clear out the pattern in the Ccb and regenerate it,
//
-
+
if (RestartScan) {
-
+
if (Ccb->UnicodeQueryTemplate.Buffer) {
if (FlagOn(Ccb->Flags, CCB_FLAG_FREE_UNICODE)) {
-
+
ExFreePoolWithTag(Ccb->UnicodeQueryTemplate.Buffer, TAG_FILENAME_BUFFER);
ClearFlag(Ccb->Flags, CCB_FLAG_FREE_UNICODE);
}
RtlFreeOemString( &Ccb->OemQueryTemplate.Wild );
ClearFlag(Ccb->Flags, CCB_FLAG_FREE_OEM_BEST_FIT);
}
-
+
Ccb->OemQueryTemplate.Wild.Buffer = NULL;
Ccb->OemQueryTemplate.Wild.Length = 0;
Ccb->OemQueryTemplate.Wild.MaximumLength = 0;
// We'll case on the type of information requested and fill up
// the user buffer if everything fits.
//
-
+
//
// Determine the UNICODE length of the file name.
//
-
+
FileNameLength = RtlOemStringToCountedUnicodeSize(&Fat8Dot3String);
//
// STATUS_SUCCESS is returned. A subsequent query will
// pick up with this record.
//
-
+
BytesRemainingInBuffer = UserBufferLength - NextEntry;
-
+
if ( (NextEntry != 0) &&
( (BaseLength + FileNameLength > BytesRemainingInBuffer) ||
(UserBufferLength < NextEntry) ) ) {
-
+
DebugTrace(0, Dbg, "Next entry won't fit\n", 0);
-
+
try_return( Status = STATUS_SUCCESS );
}
-
+
NT_ASSERT( BytesRemainingInBuffer >= BaseLength );
//
RtlZeroMemory( &Buffer[NextEntry], BaseLength );
switch ( FileInformationClass ) {
-
+
//
// Now fill the base parts of the strucure that are applicable.
//
-
+
case FileBothDirectoryInformation:
case FileFullDirectoryInformation:
case FileIdBothDirectoryInformation:
case FileIdFullDirectoryInformation:
DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file full directory information\n", 0);
-
+
//
// Get the Ea file length.
//
-
+
FullDirInfo = (PFILE_FULL_DIR_INFORMATION)&Buffer[NextEntry];
-
+
//
// If the EAs are corrupt, ignore the error. We don't want
// to abort the directory query.
//
-
+
_SEH2_TRY {
-
+
FatGetEaLength( IrpContext,
Vcb,
Dirent,
&FullDirInfo->EaSize );
-
+
} _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) {
-
+
FatResetExceptionState( IrpContext );
FullDirInfo->EaSize = 0;
} _SEH2_END;
-
+
case FileDirectoryInformation:
-
+
DirInfo = (PFILE_DIRECTORY_INFORMATION)&Buffer[NextEntry];
-
+
FatGetDirTimes( IrpContext, Dirent, DirInfo );
-
+
DirInfo->EndOfFile.QuadPart = Dirent->FileSize;
if (!FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
-
+
DirInfo->AllocationSize.QuadPart =
(((Dirent->FileSize + DiskAllocSize - 1) / DiskAllocSize) *
DiskAllocSize );
DirInfo->FileAttributes = 0;
DirInfo->FileAttributes |= FILE_ATTRIBUTE_NORMAL;
- }
-
+ }
+
DirInfo->FileIndex = NextVbo;
-
+
DirInfo->FileNameLength = FileNameLength;
-
+
DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String);
-
+
break;
-
+
case FileNamesInformation:
-
+
DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file names information\n", 0);
-
+
NamesInfo = (PFILE_NAMES_INFORMATION)&Buffer[NextEntry];
-
+
NamesInfo->FileIndex = NextVbo;
-
+
NamesInfo->FileNameLength = FileNameLength;
-
+
DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String );
-
+
break;
-
+
default:
-
+
#ifdef _MSC_VER
-#pragma prefast( suppress:28159, "things are seriously wrong if we get here" )
+#pragma prefast( suppress:28159, "things are seriously wrong if we get here" )
#endif
FatBugCheck( FileInformationClass, 0, 0 );
}
BytesConverted = 0;
-
+
Status = RtlOemToUnicodeN( (PWCH)&Buffer[NextEntry + BaseLength],
BytesRemainingInBuffer - BaseLength,
&BytesConverted,
Fat8Dot3String.Buffer,
Fat8Dot3String.Length );
-
+
//
// Check for the case that a single entry doesn't fit.
// This should only get this far on the first entry
//
-
+
if (BytesConverted < FileNameLength) {
-
+
NT_ASSERT( NextEntry == 0 );
Status = STATUS_BUFFER_OVERFLOW;
}
-
+
//
// Set up the previous next entry offset
//
-
+
*((PULONG)(&Buffer[LastEntry])) = NextEntry - LastEntry;
-
+
//
// And indicate how much of the user buffer we have currently
// used up. We must compute this value before we long align
// ourselves for the next entry
//
-
+
Irp->IoStatus.Information = QuadAlign( Irp->IoStatus.Information ) +
BaseLength + BytesConverted;
-
+
//
// If something happened with the conversion, bail here.
//
-
+
if ( !NT_SUCCESS( Status ) ) {
-
+
try_return( NOTHING );
}
} else {
ULONG ShortNameLength;
-
+
FileNameLength = LongFileName.Length;
-
+
//
// Here are the rules concerning filling up the buffer:
//
// STATUS_SUCCESS is returned. A subsequent query will
// pick up with this record.
//
-
+
BytesRemainingInBuffer = UserBufferLength - NextEntry;
-
+
if ( (NextEntry != 0) &&
( (BaseLength + FileNameLength > BytesRemainingInBuffer) ||
(UserBufferLength < NextEntry) ) ) {
-
+
DebugTrace(0, Dbg, "Next entry won't fit\n", 0);
-
+
try_return( Status = STATUS_SUCCESS );
}
-
+
NT_ASSERT( BytesRemainingInBuffer >= BaseLength );
-
+
//
// Zero the base part of the structure.
//
RtlZeroMemory( &Buffer[NextEntry], BaseLength );
switch ( FileInformationClass ) {
-
+
//
// Now fill the base parts of the strucure that are applicable.
//
-
+
case FileBothDirectoryInformation:
case FileIdBothDirectoryInformation:
-
+
BothDirInfo = (PFILE_BOTH_DIR_INFORMATION)&Buffer[NextEntry];
-
+
//
// Now we have an entry to return to our caller. We'll convert
// the name from the form in the dirent to a <name>.<ext> form.
// We'll case on the type of information requested and fill up
// the user buffer if everything fits.
//
-
+
Fat8dot3ToString( IrpContext, Dirent, FALSE, &Fat8Dot3String );
-
+
NT_ASSERT( Fat8Dot3String.Length <= 12 );
-
+
Status = RtlOemToUnicodeN( &BothDirInfo->ShortName[0],
12*sizeof(WCHAR),
&ShortNameLength,
Fat8Dot3String.Buffer,
Fat8Dot3String.Length );
-
+
NT_ASSERT( Status != STATUS_BUFFER_OVERFLOW );
NT_ASSERT( ShortNameLength <= 12*sizeof(WCHAR) );
-
+
//
// Copy the length into the dirinfo structure. Note
// that the LHS below is a USHORT, so it can not
// be specificed as the OUT parameter above.
//
-
+
BothDirInfo->ShortNameLength = (UCHAR)ShortNameLength;
-
+
//
// If something happened with the conversion, bail here.
//
-
+
if ( !NT_SUCCESS( Status ) ) {
-
+
try_return( NOTHING );
}
-
+
case FileFullDirectoryInformation:
case FileIdFullDirectoryInformation:
-
+
DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file full directory information\n", 0);
-
+
//
// Get the Ea file length.
//
-
+
FullDirInfo = (PFILE_FULL_DIR_INFORMATION)&Buffer[NextEntry];
-
+
//
// If the EAs are corrupt, ignore the error. We don't want
// to abort the directory query.
//
-
+
_SEH2_TRY {
-
+
FatGetEaLength( IrpContext,
Vcb,
Dirent,
&FullDirInfo->EaSize );
-
+
} _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER) {
-
+
FatResetExceptionState( IrpContext );
FullDirInfo->EaSize = 0;
} _SEH2_END;
-
+
case FileDirectoryInformation:
-
+
DirInfo = (PFILE_DIRECTORY_INFORMATION)&Buffer[NextEntry];
-
+
FatGetDirTimes( IrpContext, Dirent, DirInfo );
-
+
DirInfo->EndOfFile.QuadPart = Dirent->FileSize;
-
+
if (!FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
/ DiskAllocSize )
* DiskAllocSize );
}
-
+
if (Dirent->Attributes != 0) {
DirInfo->FileAttributes = Dirent->Attributes;
DirInfo->FileIndex = NextVbo;
-
+
DirInfo->FileNameLength = FileNameLength;
-
+
DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String);
-
+
break;
-
+
case FileNamesInformation:
-
+
DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file names information\n", 0);
-
+
NamesInfo = (PFILE_NAMES_INFORMATION)&Buffer[NextEntry];
-
+
NamesInfo->FileIndex = NextVbo;
-
+
NamesInfo->FileNameLength = FileNameLength;
-
+
DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String );
-
+
break;
-
+
default:
#ifdef _MSC_VER
-#pragma prefast( suppress:28159, "things are seriously wrong if we get here" )
+#pragma prefast( suppress:28159, "things are seriously wrong if we get here" )
#endif
FatBugCheck( FileInformationClass, 0, 0 );
}
BytesConverted = BytesRemainingInBuffer - BaseLength >= FileNameLength ?
FileNameLength :
BytesRemainingInBuffer - BaseLength;
-
+
RtlCopyMemory( &Buffer[NextEntry + BaseLength],
&LongFileName.Buffer[0],
BytesConverted );
-
+
//
// Set up the previous next entry offset
//
-
+
*((PULONG)(&Buffer[LastEntry])) = NextEntry - LastEntry;
//
// used up. We must compute this value before we long align
// ourselves for the next entry
//
-
+
Irp->IoStatus.Information = QuadAlign( Irp->IoStatus.Information ) +
BaseLength + BytesConverted;
default:
break;
}
-
+
} _SEH2_EXCEPT (EXCEPTION_EXECUTE_HANDLER) {
//
// fail this request. This is the only reason any exception
// would have occured at this level.
//
-
+
Irp->IoStatus.Information = 0;
UpdateCcb = FALSE;
try_return( Status = _SEH2_GetExceptionCode());
LastEntry = NextEntry;
NextEntry += (ULONG)QuadAlign(BaseLength + BytesConverted);
-
+
CurrentVbo = NextVbo + sizeof( DIRENT );
}
return Status;
}
-\f
+
//
// Local Support Routine
//
}
}
-\f
+
//
// Local Support Routine
//
projects / reactos.git / blobdiff