BOOLEAN SpyIsWatchedPath(_In_ PUNICODE_STRING path)
{
BOOLEAN result = FALSE;
if (!InterlockedExchange(&MiniFSWatcherData.WatchPathInUse, TRUE))
{
result = FsRtlIsNameInExpression(&MiniFSWatcherData.WatchPath, path, TRUE, NULL);
MiniFSWatcherData.WatchPathInUse = FALSE;
}
return result;
}
// Checks if the export is listed as a hook target, and if so install a hook.
_Use_decl_annotations_ EXTERN_C static bool DdimonpEnumExportedSymbolsCallback(
ULONG index, ULONG_PTR base_address, PIMAGE_EXPORT_DIRECTORY directory,
ULONG_PTR directory_base, ULONG_PTR directory_end, void* context) {
PAGED_CODE();
if (!context) {
return false;
}
auto functions =
reinterpret_cast<ULONG*>(base_address + directory->AddressOfFunctions);
auto ordinals = reinterpret_cast<USHORT*>(base_address +
directory->AddressOfNameOrdinals);
auto names =
reinterpret_cast<ULONG*>(base_address + directory->AddressOfNames);
auto ord = ordinals[index];
auto export_address = base_address + functions[ord];
auto export_name = reinterpret_cast<const char*>(base_address + names[index]);
// Check if an export is forwared one? If so, ignore it.
if (UtilIsInBounds(export_address, directory_base, directory_end)) {
return true;
}
// convert the name to UNICODE_STRING
wchar_t name[100];
auto status =
RtlStringCchPrintfW(name, RTL_NUMBER_OF(name), L"%S", export_name);
if (!NT_SUCCESS(status)) {
return true;
}
UNICODE_STRING name_u = {};
RtlInitUnicodeString(&name_u, name);
for (auto& target : g_ddimonp_hook_targets) {
// Is this export listed as a target
if (!FsRtlIsNameInExpression(&target.target_name, &name_u, TRUE, nullptr)) {
continue;
}
// Yes, install a hook to the export
if (!ShInstallHook(reinterpret_cast<SharedShadowHookData*>(context),
reinterpret_cast<void*>(export_address), &target)) {
// This is an error which should not happen
DdimonpFreeAllocatedTrampolineRegions();
return false;
}
HYPERPLATFORM_LOG_INFO("Hook has been installed at %p %s.", export_address,
export_name);
}
return true;
}
EXTERN_C static bool ScvnpIsWhiteListedFile(
_In_ PUNICODE_STRING TargetFileName) {
PAGED_CODE();
UNICODE_STRING WHITE_LIST[] = {
RTL_CONSTANT_STRING(
L"\\DEVICE\\HARDDISKVOLUME?\\*"
L"\\APPDATA\\LOCAL\\MICROSOFT\\WINDOWS\\EXPLORER\\THUMBCACHE_*.DB"),
};
for (auto i = 0; i < RTL_NUMBER_OF(WHITE_LIST); ++i) {
if (FsRtlIsNameInExpression(&WHITE_LIST[i], TargetFileName, TRUE,
nullptr)) {
return true;
}
}
return false;
}
BOOLEAN
CompareFileName(PUNICODE_STRING FileName,
PINDEX_ENTRY_ATTRIBUTE IndexEntry,
BOOLEAN DirSearch)
{
BOOLEAN Ret, Alloc = FALSE;
UNICODE_STRING EntryName;
EntryName.Buffer = IndexEntry->FileName.Name;
EntryName.Length =
EntryName.MaximumLength = IndexEntry->FileName.NameLength * sizeof(WCHAR);
if (DirSearch)
{
UNICODE_STRING IntFileName;
if (IndexEntry->FileName.NameType != NTFS_FILE_NAME_POSIX)
{
NT_VERIFY(NT_SUCCESS(RtlUpcaseUnicodeString(&IntFileName, FileName, TRUE)));
Alloc = TRUE;
}
else
{
IntFileName = *FileName;
}
Ret = FsRtlIsNameInExpression(&IntFileName, &EntryName, (IndexEntry->FileName.NameType != NTFS_FILE_NAME_POSIX), NULL);
if (Alloc)
{
RtlFreeUnicodeString(&IntFileName);
}
return Ret;
}
else
{
return (RtlCompareUnicodeString(FileName, &EntryName, (IndexEntry->FileName.NameType != NTFS_FILE_NAME_POSIX)) == 0);
}
}
static VOID FsRtlIsNameInExpressionTest()
{
ULONG i;
for (i = 0; i < sizeof(Tests) / sizeof(Tests[0]); i++)
{
BOOLEAN TestResult;
UNICODE_STRING Expression;
UNICODE_STRING Name;
/* Don't run Tests which are known to assert in checked builds */
if (KmtIsCheckedBuild && Tests[i].AssertsInChecked)
continue;
RtlInitUnicodeString(&Expression, Tests[i].Expression);
RtlInitUnicodeString(&Name, Tests[i].Name);
TestResult = FsRtlIsNameInExpression(&Expression, &Name, Tests[i].IgnoreCase, NULL);
ok(TestResult == Tests[i].Expected, "FsRtlIsNameInExpression(%wZ,%wZ,%s,NULL): Expected %s, got %s\n",
&Expression, &Name, Tests[i].IgnoreCase ? "TRUE" : "FALSE", Tests[i].Expected ? "TRUE" : "FALSE", TestResult ? "TRUE" : "FALSE");
}
/* TODO: test UpcaseTable */
}
NTSTATUS
CdfsDirFindFile(PDEVICE_EXTENSION DeviceExt,
PFCB DirectoryFcb,
PUNICODE_STRING FileToFind,
PFCB *FoundFCB)
{
UNICODE_STRING TempName;
WCHAR Name[256];
PVOID Block;
ULONG DirSize;
PDIR_RECORD Record;
ULONG Offset;
ULONG BlockOffset;
NTSTATUS Status;
LARGE_INTEGER StreamOffset, OffsetOfEntry;
PVOID Context;
WCHAR ShortNameBuffer[13];
UNICODE_STRING ShortName;
UNICODE_STRING LongName;
UNICODE_STRING FileToFindUpcase;
ASSERT(DeviceExt);
ASSERT(DirectoryFcb);
ASSERT(FileToFind);
DPRINT("CdfsDirFindFile(VCB:%p, dirFCB:%p, File:%wZ)\n",
DeviceExt,
DirectoryFcb,
FileToFind);
DPRINT("Dir Path:%S\n", DirectoryFcb->PathName);
/* default to '.' if no filename specified */
if (FileToFind->Length == 0)
{
RtlInitUnicodeString(&TempName, L".");
FileToFind = &TempName;
}
DirSize = DirectoryFcb->Entry.DataLengthL;
StreamOffset.QuadPart = (LONGLONG)DirectoryFcb->Entry.ExtentLocationL * (LONGLONG)BLOCKSIZE;
if (!CcMapData(DeviceExt->StreamFileObject,
&StreamOffset,
BLOCKSIZE,
TRUE,
&Context,
&Block))
{
DPRINT("CcMapData() failed\n");
return STATUS_UNSUCCESSFUL;
}
Offset = 0;
BlockOffset = 0;
Record = (PDIR_RECORD)Block;
/* Upper case the expression for FsRtlIsNameInExpression */
Status = RtlUpcaseUnicodeString(&FileToFindUpcase, FileToFind, TRUE);
if (!NT_SUCCESS(Status))
{
return Status;
}
while(TRUE)
{
if (Record->RecordLength == 0)
{
DPRINT("RecordLength == 0 Stopped!\n");
break;
}
DPRINT("RecordLength %u ExtAttrRecordLength %u NameLength %u\n",
Record->RecordLength, Record->ExtAttrRecordLength, Record->FileIdLength);
CdfsGetDirEntryName(DeviceExt, Record, Name);
DPRINT ("Name '%S'\n", Name);
DPRINT ("Sector %lu\n", DirectoryFcb->Entry.ExtentLocationL);
DPRINT ("Offset %lu\n", Offset);
RtlInitUnicodeString(&LongName, Name);
ShortName.Length = 0;
ShortName.MaximumLength = 26;
ShortName.Buffer = ShortNameBuffer;
memset(ShortNameBuffer, 0, 26);
OffsetOfEntry.QuadPart = StreamOffset.QuadPart + Offset;
CdfsShortNameCacheGet(DirectoryFcb, &OffsetOfEntry, &LongName, &ShortName);
DPRINT("ShortName '%wZ'\n", &ShortName);
if (FsRtlIsNameInExpression(&FileToFindUpcase, &LongName, TRUE, NULL) ||
FsRtlIsNameInExpression(&FileToFindUpcase, &ShortName, TRUE, NULL))
{
DPRINT("Match found, %S\n", Name);
Status = CdfsMakeFCBFromDirEntry(DeviceExt,
DirectoryFcb,
Name,
ShortNameBuffer,
Record,
DirectoryFcb->Entry.ExtentLocationL,
Offset,
FoundFCB);
RtlFreeUnicodeString(&FileToFindUpcase);
CcUnpinData(Context);
return(Status);
}
Offset += Record->RecordLength;
BlockOffset += Record->RecordLength;
Record = (PDIR_RECORD)((ULONG_PTR)Block + BlockOffset);
if (BlockOffset >= BLOCKSIZE || Record->RecordLength == 0)
{
DPRINT("Map next sector\n");
CcUnpinData(Context);
StreamOffset.QuadPart += BLOCKSIZE;
Offset = ROUND_UP(Offset, BLOCKSIZE);
BlockOffset = 0;
if (!CcMapData(DeviceExt->StreamFileObject,
&StreamOffset,
BLOCKSIZE, TRUE,
&Context, &Block))
{
DPRINT("CcMapData() failed\n");
RtlFreeUnicodeString(&FileToFindUpcase);
return(STATUS_UNSUCCESSFUL);
}
Record = (PDIR_RECORD)((ULONG_PTR)Block + BlockOffset);
}
if (Offset >= DirSize)
break;
}
RtlFreeUnicodeString(&FileToFindUpcase);
CcUnpinData(Context);
return(STATUS_OBJECT_NAME_NOT_FOUND);
}
NTSTATUS DoMatchExpression(PUNICODE_STRING Path)
{
// 是否需要在这里判断是否在重定向根目录内
// 这里要先判断链表是否为空
if (IsListEmpty(&MatchExpressionList.HeadList))
return STATUS_NOT_FOUND;
UNICODE_STRING tmpPath;
RtlZeroMemory(&tmpPath, sizeof(UNICODE_STRING));
tmpPath.MaximumLength = sizeof(WCHAR) * 260;
tmpPath.Buffer = (PWSTR)ExAllocatePool(NonPagedPool, tmpPath.MaximumLength);
if (tmpPath.Buffer == NULL)
return STATUS_NOT_FOUND;
RtlCopyUnicodeString(&tmpPath, Path);
KIRQL irql;
KeAcquireSpinLock(&MatchExpressionList.Lock, &irql);
// 链表头
PLIST_ENTRY pList = MatchExpressionList.HeadList.Flink;
BOOLEAN isMatched = FALSE;
while (pList != &MatchExpressionList.HeadList)
{
PMATCH_EXPRESSION element = CONTAINING_RECORD(pList, MATCH_EXPRESSION, ListEntry);
// 注意，这里这样申请内存其实还挺频繁的
// 如果这里还是有问题，可能就要用Looksaide结构来处理内存问题了
UNICODE_STRING Expression;
RtlZeroMemory(&Expression, sizeof(UNICODE_STRING));
Expression.MaximumLength = sizeof(WCHAR) * 260;
Expression.Buffer = (PWSTR)ExAllocatePool(NonPagedPool, Expression.MaximumLength);
if (Expression.Buffer == NULL)
{
KdPrint(("[ISISandBox] DoMatchExpression -> Alloc pool for Expression string buffer failed.\n"));
pList = pList->Flink;
continue;
}
RtlUnicodeStringCbCopyStringN(&Expression, element->Expression, sizeof(WCHAR) * 260);
Expression.Length = (USHORT)element->Length;
KdPrint(("[ISISandBox] Current expression : %wZ %u\n", &Expression, Expression.Length));
KdPrint(("[ISISandBox] Current path : %wZ\n", &tmpPath));
// 注意：这里经常触发蓝屏，最近一次是因为 DRIVER_CORRUPTED_EXPOOL (C5)
// 说明此处对内存的读写性要求比较高，应该使用灵活度更高的内存空间
// 所以这两个字符串所在内存都是在此函数中动态申请的非分页内存，应该能解决问题
BOOLEAN ret = FsRtlIsNameInExpression(&Expression, &tmpPath, TRUE, NULL);
ExFreePool(Expression.Buffer);
if (ret)
{
KdPrint(("[ISISandBox] Match Expression OK : %wZ.\n", &tmpPath));
isMatched = TRUE;
break;
}
pList = pList->Flink;
}
KeReleaseSpinLock(&MatchExpressionList.Lock, irql);
ExFreePool(tmpPath.Buffer);
if (isMatched)
return STATUS_SUCCESS;
else
{
//KdPrint(("[ISISandBox] CheckMatchExpression Cannot find Expression : %wZ.\n", Expression));
return STATUS_NOT_FOUND;
}
}
__drv_mustHoldCriticalRegion
NTSTATUS
FFSQueryDirectory(
IN PFFS_IRP_CONTEXT IrpContext)
{
PDEVICE_OBJECT DeviceObject;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
PFFS_VCB Vcb = 0;
PFILE_OBJECT FileObject;
PFFS_FCB Fcb = 0;
PFFS_CCB Ccb;
PIRP Irp;
PIO_STACK_LOCATION IoStackLocation;
FILE_INFORMATION_CLASS FileInformationClass;
ULONG Length;
PUNICODE_STRING FileName;
ULONG FileIndex;
BOOLEAN RestartScan;
BOOLEAN ReturnSingleEntry;
BOOLEAN IndexSpecified;
PUCHAR Buffer;
BOOLEAN FirstQuery;
PFFSv1_INODE dinode1 = NULL;
PFFSv2_INODE dinode2 = NULL;
BOOLEAN FcbResourceAcquired = FALSE;
ULONG UsedLength = 0;
USHORT InodeFileNameLength;
UNICODE_STRING InodeFileName;
PFFS_DIR_ENTRY pDir = NULL;
ULONG dwBytes;
ULONG dwTemp = 0;
ULONG dwSize = 0;
ULONG dwReturn = 0;
BOOLEAN bRun = TRUE;
ULONG ByteOffset;
PAGED_CODE();
InodeFileName.Buffer = NULL;
_SEH2_TRY
{
ASSERT(IrpContext);
ASSERT((IrpContext->Identifier.Type == FFSICX) &&
(IrpContext->Identifier.Size == sizeof(FFS_IRP_CONTEXT)));
DeviceObject = IrpContext->DeviceObject;
//
// This request is not allowed on the main device object
//
if (DeviceObject == FFSGlobal->DeviceObject)
{
Status = STATUS_INVALID_DEVICE_REQUEST;
_SEH2_LEAVE;
}
Vcb = (PFFS_VCB)DeviceObject->DeviceExtension;
ASSERT(Vcb != NULL);
ASSERT((Vcb->Identifier.Type == FFSVCB) &&
(Vcb->Identifier.Size == sizeof(FFS_VCB)));
ASSERT(IsMounted(Vcb));
FileObject = IrpContext->FileObject;
Fcb = (PFFS_FCB)FileObject->FsContext;
ASSERT(Fcb);
//
// This request is not allowed on volumes
//
if (Fcb->Identifier.Type == FFSVCB)
{
Status = STATUS_INVALID_PARAMETER;
_SEH2_LEAVE;
}
ASSERT((Fcb->Identifier.Type == FFSFCB) &&
(Fcb->Identifier.Size == sizeof(FFS_FCB)));
if (!IsDirectory(Fcb))
{
Status = STATUS_INVALID_PARAMETER;
_SEH2_LEAVE;
}
Ccb = (PFFS_CCB)FileObject->FsContext2;
ASSERT(Ccb);
ASSERT((Ccb->Identifier.Type == FFSCCB) &&
(Ccb->Identifier.Size == sizeof(FFS_CCB)));
Irp = IrpContext->Irp;
IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
#if !defined(_GNU_NTIFS_) || defined(__REACTOS__)
FileInformationClass =
IoStackLocation->Parameters.QueryDirectory.FileInformationClass;
Length = IoStackLocation->Parameters.QueryDirectory.Length;
FileName = IoStackLocation->Parameters.QueryDirectory.FileName;
FileIndex = IoStackLocation->Parameters.QueryDirectory.FileIndex;
#else // _GNU_NTIFS_
FileInformationClass = ((PEXTENDED_IO_STACK_LOCATION)
IoStackLocation)->Parameters.QueryDirectory.FileInformationClass;
Length = ((PEXTENDED_IO_STACK_LOCATION)
IoStackLocation)->Parameters.QueryDirectory.Length;
FileName = ((PEXTENDED_IO_STACK_LOCATION)
IoStackLocation)->Parameters.QueryDirectory.FileName;
FileIndex = ((PEXTENDED_IO_STACK_LOCATION)
IoStackLocation)->Parameters.QueryDirectory.FileIndex;
#endif // _GNU_NTIFS_
RestartScan = FlagOn(IoStackLocation->Flags, SL_RESTART_SCAN);
ReturnSingleEntry = FlagOn(IoStackLocation->Flags, SL_RETURN_SINGLE_ENTRY);
IndexSpecified = FlagOn(IoStackLocation->Flags, SL_INDEX_SPECIFIED);
/*
if (!Irp->MdlAddress && Irp->UserBuffer)
{
ProbeForWrite(Irp->UserBuffer, Length, 1);
}
*/
Buffer = FFSGetUserBuffer(Irp);
if (Buffer == NULL)
{
FFSBreakPoint();
Status = STATUS_INVALID_USER_BUFFER;
_SEH2_LEAVE;
}
if (!IrpContext->IsSynchronous)
{
Status = STATUS_PENDING;
_SEH2_LEAVE;
}
if (!ExAcquireResourceSharedLite(
&Fcb->MainResource,
IrpContext->IsSynchronous))
{
Status = STATUS_PENDING;
_SEH2_LEAVE;
}
FcbResourceAcquired = TRUE;
if (FileName != NULL)
{
if (Ccb->DirectorySearchPattern.Buffer != NULL)
{
FirstQuery = FALSE;
}
else
{
FirstQuery = TRUE;
Ccb->DirectorySearchPattern.Length =
Ccb->DirectorySearchPattern.MaximumLength =
FileName->Length;
Ccb->DirectorySearchPattern.Buffer =
ExAllocatePoolWithTag(PagedPool, FileName->Length, FFS_POOL_TAG);
if (Ccb->DirectorySearchPattern.Buffer == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
_SEH2_LEAVE;
}
Status = RtlUpcaseUnicodeString(
&(Ccb->DirectorySearchPattern),
FileName,
FALSE);
if (!NT_SUCCESS(Status))
_SEH2_LEAVE;
}
}
else if (Ccb->DirectorySearchPattern.Buffer != NULL)
{
FirstQuery = FALSE;
FileName = &Ccb->DirectorySearchPattern;
}
else
{
FirstQuery = TRUE;
Ccb->DirectorySearchPattern.Length =
Ccb->DirectorySearchPattern.MaximumLength = 2;
Ccb->DirectorySearchPattern.Buffer =
ExAllocatePoolWithTag(PagedPool, 2, FFS_POOL_TAG);
if (Ccb->DirectorySearchPattern.Buffer == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
_SEH2_LEAVE;
}
RtlCopyMemory(
Ccb->DirectorySearchPattern.Buffer,
L"*\0", 2);
}
if (!IndexSpecified)
{
if (RestartScan || FirstQuery)
{
FileIndex = Fcb->FFSMcb->DeOffset = 0;
}
else
{
FileIndex = Ccb->CurrentByteOffset;
}
}
if (FS_VERSION == 1)
{
dinode1 = (PFFSv1_INODE)ExAllocatePoolWithTag(
PagedPool,
DINODE1_SIZE, FFS_POOL_TAG);
if (dinode1 == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
_SEH2_LEAVE;
}
RtlZeroMemory(Buffer, Length);
if (Fcb->dinode1->di_size <= FileIndex)
{
Status = STATUS_NO_MORE_FILES;
_SEH2_LEAVE;
}
}
else
{
dinode2 = (PFFSv2_INODE)ExAllocatePoolWithTag(
PagedPool,
DINODE2_SIZE, FFS_POOL_TAG);
if (dinode2 == NULL)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
_SEH2_LEAVE;
}
RtlZeroMemory(Buffer, Length);
if (Fcb->dinode2->di_size <= FileIndex)
{
Status = STATUS_NO_MORE_FILES;
_SEH2_LEAVE;
}
}
pDir = ExAllocatePoolWithTag(PagedPool,
sizeof(FFS_DIR_ENTRY), FFS_POOL_TAG);
if (!pDir)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
_SEH2_LEAVE;
}
if (FS_VERSION == 1)
{
dwBytes = 0;
dwSize = (ULONG)Fcb->dinode1->di_size - FileIndex -
(sizeof(FFS_DIR_ENTRY) - FFS_NAME_LEN + 1);
ByteOffset = FileIndex;
dwTemp = 0;
while (bRun && UsedLength < Length && dwBytes < dwSize)
{
OEM_STRING OemName;
RtlZeroMemory(pDir, sizeof(FFS_DIR_ENTRY));
Status = FFSv1ReadInode(
NULL,
Vcb,
Fcb->dinode1,
ByteOffset,
(PVOID)pDir,
sizeof(FFS_DIR_ENTRY),
&dwReturn);
if (!NT_SUCCESS(Status))
{
_SEH2_LEAVE;
}
if (!pDir->d_ino)
{
if (pDir->d_reclen == 0)
{
FFSBreakPoint();
_SEH2_LEAVE;
}
goto ProcessNextEntryv1;
}
OemName.Buffer = pDir->d_name;
OemName.Length = (pDir->d_namlen & 0xff);
OemName.MaximumLength = OemName.Length;
#if 0
/*
//
// We could not filter the files: "." and ".."
//
if ((OemName.Length >) 1 && OemName.Buffer[0] == '.')
{
if ( OemName.Length == 2 && OemName.Buffer[1] == '.')
{
}
else
{
goto ProcessNextEntry1;
}
}
*/
#endif
InodeFileNameLength = (USHORT)
RtlOemStringToUnicodeSize(&OemName);
InodeFileName.Length = 0;
InodeFileName.MaximumLength = InodeFileNameLength + 2;
if (InodeFileNameLength <= 0)
{
break;
}
InodeFileName.Buffer = ExAllocatePoolWithTag(
PagedPool,
InodeFileNameLength + 2, FFS_POOL_TAG);
if (!InodeFileName.Buffer)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
_SEH2_LEAVE;
}
RtlZeroMemory(
InodeFileName.Buffer,
InodeFileNameLength + 2);
Status = FFSOEMToUnicode(&InodeFileName,
&OemName);
if (!NT_SUCCESS(Status))
{
_SEH2_LEAVE;
}
if (FsRtlDoesNameContainWildCards(
&(Ccb->DirectorySearchPattern)) ?
FsRtlIsNameInExpression(
&(Ccb->DirectorySearchPattern),
&InodeFileName,
TRUE,
NULL) :
!RtlCompareUnicodeString(
&(Ccb->DirectorySearchPattern),
&InodeFileName,
TRUE))
{
dwReturn = FFSProcessDirEntry(
Vcb, FileInformationClass,
pDir->d_ino,
Buffer,
UsedLength,
Length - UsedLength,
(FileIndex + dwBytes),
&InodeFileName,
ReturnSingleEntry);
if (dwReturn <= 0)
{
bRun = FALSE;
}
else
{
dwTemp = UsedLength;
UsedLength += dwReturn;
}
}
if (InodeFileName.Buffer != NULL)
{
ExFreePool(InodeFileName.Buffer);
InodeFileName.Buffer = NULL;
}
ProcessNextEntryv1:
if (bRun)
{
dwBytes +=pDir->d_reclen;
Ccb->CurrentByteOffset = FileIndex + dwBytes;
}
if (UsedLength && ReturnSingleEntry)
{
Status = STATUS_SUCCESS;
_SEH2_LEAVE;
}
ByteOffset = FileIndex + dwBytes;
}
}
else
{
dwBytes = 0;
dwSize = (ULONG)Fcb->dinode2->di_size - FileIndex -
(sizeof(FFS_DIR_ENTRY) - FFS_NAME_LEN + 1);
ByteOffset = FileIndex;
dwTemp = 0;
while (bRun && UsedLength < Length && dwBytes < dwSize)
{
OEM_STRING OemName;
RtlZeroMemory(pDir, sizeof(FFS_DIR_ENTRY));
Status = FFSv2ReadInode(
NULL,
Vcb,
Fcb->dinode2,
ByteOffset,
(PVOID)pDir,
sizeof(FFS_DIR_ENTRY),
&dwReturn);
if (!NT_SUCCESS(Status))
{
_SEH2_LEAVE;
}
if (!pDir->d_ino)
{
if (pDir->d_reclen == 0)
{
FFSBreakPoint();
_SEH2_LEAVE;
}
goto ProcessNextEntryv2;
}
OemName.Buffer = pDir->d_name;
OemName.Length = (pDir->d_namlen & 0xff);
OemName.MaximumLength = OemName.Length;
#if 0
/*
//
// We could not filter the files: "." and ".."
//
if ((OemName.Length >) 1 && OemName.Buffer[0] == '.')
{
if ( OemName.Length == 2 && OemName.Buffer[1] == '.')
{
}
else
{
goto ProcessNextEntry2;
}
}
*/
#endif
InodeFileNameLength = (USHORT)
RtlOemStringToUnicodeSize(&OemName);
InodeFileName.Length = 0;
InodeFileName.MaximumLength = InodeFileNameLength + 2;
if (InodeFileNameLength <= 0)
{
break;
}
InodeFileName.Buffer = ExAllocatePoolWithTag(
PagedPool,
InodeFileNameLength + 2, FFS_POOL_TAG);
if (!InodeFileName.Buffer)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
_SEH2_LEAVE;
}
RtlZeroMemory(
InodeFileName.Buffer,
InodeFileNameLength + 2);
Status = FFSOEMToUnicode(&InodeFileName,
&OemName);
if (!NT_SUCCESS(Status))
{
_SEH2_LEAVE;
}
if (FsRtlDoesNameContainWildCards(
&(Ccb->DirectorySearchPattern)) ?
FsRtlIsNameInExpression(
&(Ccb->DirectorySearchPattern),
&InodeFileName,
TRUE,
NULL) :
!RtlCompareUnicodeString(
&(Ccb->DirectorySearchPattern),
&InodeFileName,
TRUE))
{
dwReturn = FFSProcessDirEntry(
Vcb, FileInformationClass,
pDir->d_ino,
Buffer,
UsedLength,
Length - UsedLength,
(FileIndex + dwBytes),
&InodeFileName,
ReturnSingleEntry);
if (dwReturn <= 0)
{
bRun = FALSE;
}
else
{
dwTemp = UsedLength;
UsedLength += dwReturn;
}
}
if (InodeFileName.Buffer != NULL)
{
ExFreePool(InodeFileName.Buffer);
InodeFileName.Buffer = NULL;
}
ProcessNextEntryv2:
if (bRun)
{
dwBytes +=pDir->d_reclen;
Ccb->CurrentByteOffset = FileIndex + dwBytes;
}
if (UsedLength && ReturnSingleEntry)
{
Status = STATUS_SUCCESS;
_SEH2_LEAVE;
}
ByteOffset = FileIndex + dwBytes;
}
}
FileIndex += dwBytes;
((PULONG)((PUCHAR)Buffer + dwTemp)) [0] = 0;
if (!UsedLength)
{
if (FirstQuery)
{
Status = STATUS_NO_SUCH_FILE;
}
else
{
Status = STATUS_NO_MORE_FILES;
}
}
else
{
Status = STATUS_SUCCESS;
}
}
_SEH2_FINALLY
{
if (FcbResourceAcquired)
{
ExReleaseResourceForThreadLite(
&Fcb->MainResource,
ExGetCurrentResourceThread());
}
if (FS_VERSION == 1)
{
if (dinode1 != NULL)
{
ExFreePool(dinode1);
}
}
else
{
if (dinode2 != NULL)
{
ExFreePool(dinode2);
}
}
if (pDir != NULL)
{
ExFreePool(pDir);
pDir = NULL;
}
if (InodeFileName.Buffer != NULL)
{
ExFreePool(InodeFileName.Buffer);
}
if (!IrpContext->ExceptionInProgress)
{
if (Status == STATUS_PENDING)
{
Status = FFSLockUserBuffer(
IrpContext->Irp,
Length,
IoWriteAccess);
if (NT_SUCCESS(Status))
{
Status = FFSQueueRequest(IrpContext);
}
else
{
FFSCompleteIrpContext(IrpContext, Status);
}
}
else
{
IrpContext->Irp->IoStatus.Information = UsedLength;
FFSCompleteIrpContext(IrpContext, Status);
}
}
} _SEH2_END;
return Status;
}
/*
* FUNCTION: Find a file
*/
static NTSTATUS
CdfsFindFile(PDEVICE_EXTENSION DeviceExt,
PFCB Fcb,
PFCB Parent,
PUNICODE_STRING FileToFind,
PULONG pDirIndex,
PULONG pOffset)
{
WCHAR name[256];
WCHAR ShortNameBuffer[13];
UNICODE_STRING TempString;
UNICODE_STRING ShortName;
UNICODE_STRING LongName;
UNICODE_STRING FileToFindUpcase;
PVOID Block;
NTSTATUS Status;
ULONG len;
ULONG DirIndex;
ULONG Offset = 0;
BOOLEAN IsRoot;
PVOID Context = NULL;
ULONG DirSize;
PDIR_RECORD Record;
LARGE_INTEGER StreamOffset, OffsetOfEntry;
DPRINT("FindFile(Parent %p, FileToFind '%wZ', DirIndex: %u)\n",
Parent, FileToFind, pDirIndex ? *pDirIndex : 0);
DPRINT("FindFile: old Pathname %p, old Objectname %p)\n",
Fcb->PathName, Fcb->ObjectName);
IsRoot = FALSE;
DirIndex = 0;
if (FileToFind == NULL || FileToFind->Length == 0)
{
RtlInitUnicodeString(&TempString, L".");
FileToFind = &TempString;
}
if (Parent)
{
if (Parent->Entry.ExtentLocationL == DeviceExt->CdInfo.RootStart)
{
IsRoot = TRUE;
}
}
else
{
IsRoot = TRUE;
}
if (IsRoot == TRUE)
{
StreamOffset.QuadPart = (LONGLONG)DeviceExt->CdInfo.RootStart * (LONGLONG)BLOCKSIZE;
DirSize = DeviceExt->CdInfo.RootSize;
if (FileToFind->Buffer[0] == 0 ||
(FileToFind->Buffer[0] == '\\' && FileToFind->Buffer[1] == 0) ||
(FileToFind->Buffer[0] == '.' && FileToFind->Buffer[1] == 0))
{
/* it's root : complete essentials fields then return ok */
RtlZeroMemory(Fcb, sizeof(FCB));
RtlInitEmptyUnicodeString(&Fcb->PathName, Fcb->PathNameBuffer, sizeof(Fcb->PathNameBuffer));
Fcb->PathNameBuffer[0] = '\\';
Fcb->PathName.Length = sizeof(WCHAR);
Fcb->ObjectName = &Fcb->PathNameBuffer[1];
Fcb->Entry.ExtentLocationL = DeviceExt->CdInfo.RootStart;
Fcb->Entry.DataLengthL = DeviceExt->CdInfo.RootSize;
Fcb->Entry.FileFlags = 0x02; //FILE_ATTRIBUTE_DIRECTORY;
if (pDirIndex)
*pDirIndex = 0;
if (pOffset)
*pOffset = 0;
DPRINT("CdfsFindFile: new Pathname %wZ, new Objectname %S)\n",&Fcb->PathName, Fcb->ObjectName);
return STATUS_SUCCESS;
}
}
else
{
StreamOffset.QuadPart = (LONGLONG)Parent->Entry.ExtentLocationL * (LONGLONG)BLOCKSIZE;
DirSize = Parent->Entry.DataLengthL;
}
DPRINT("StreamOffset %I64d DirSize %u\n", StreamOffset.QuadPart, DirSize);
if (pDirIndex && (*pDirIndex))
DirIndex = *pDirIndex;
if (pOffset && (*pOffset))
{
Offset = *pOffset;
StreamOffset.QuadPart += ROUND_DOWN(Offset, BLOCKSIZE);
}
if (!CcMapData(DeviceExt->StreamFileObject, &StreamOffset,
BLOCKSIZE, TRUE, &Context, &Block))
{
DPRINT("CcMapData() failed\n");
return STATUS_UNSUCCESSFUL;
}
Record = (PDIR_RECORD) ((ULONG_PTR)Block + Offset % BLOCKSIZE);
if (Offset)
{
Offset += Record->RecordLength;
Record = (PDIR_RECORD)((ULONG_PTR)Record + Record->RecordLength);
}
/* Upper case the expression for FsRtlIsNameInExpression */
Status = RtlUpcaseUnicodeString(&FileToFindUpcase, FileToFind, TRUE);
if (!NT_SUCCESS(Status))
{
return Status;
}
while(TRUE)
{
DPRINT("RecordLength %u ExtAttrRecordLength %u NameLength %u\n",
Record->RecordLength, Record->ExtAttrRecordLength, Record->FileIdLength);
Status = CdfsGetEntryName
(DeviceExt, &Context, &Block, &StreamOffset,
DirSize, (PVOID*)&Record, name, &DirIndex, &Offset);
if (Status == STATUS_NO_MORE_ENTRIES)
{
break;
}
else if (Status == STATUS_UNSUCCESSFUL || Status == STATUS_DISK_CORRUPT_ERROR)
{
/* Note: the directory cache has already been unpinned */
RtlFreeUnicodeString(&FileToFindUpcase);
return Status;
}
DPRINT("Name '%S'\n", name);
RtlInitUnicodeString(&LongName, name);
ShortName.Length = 0;
ShortName.MaximumLength = 26;
ShortName.Buffer = ShortNameBuffer;
OffsetOfEntry.QuadPart = StreamOffset.QuadPart + Offset;
CdfsShortNameCacheGet(Parent, &OffsetOfEntry, &LongName, &ShortName);
DPRINT("ShortName '%wZ'\n", &ShortName);
if (FsRtlIsNameInExpression(&FileToFindUpcase, &LongName, TRUE, NULL) ||
FsRtlIsNameInExpression(&FileToFindUpcase, &ShortName, TRUE, NULL))
{
if (Parent->PathName.Buffer[0])
{
RtlCopyUnicodeString(&Fcb->PathName, &Parent->PathName);
len = Parent->PathName.Length / sizeof(WCHAR);
Fcb->ObjectName=&Fcb->PathName.Buffer[len];
if (len != 1 || Fcb->PathName.Buffer[0] != '\\')
{
Fcb->ObjectName[0] = '\\';
Fcb->ObjectName = &Fcb->ObjectName[1];
}
}
else
{
Fcb->ObjectName=Fcb->PathName.Buffer;
Fcb->ObjectName[0]='\\';
Fcb->ObjectName=&Fcb->ObjectName[1];
}
DPRINT("PathName '%wZ' ObjectName '%S'\n", &Fcb->PathName, Fcb->ObjectName);
memcpy(&Fcb->Entry, Record, sizeof(DIR_RECORD));
wcsncpy(Fcb->ObjectName, name, min(wcslen(name) + 1,
MAX_PATH - (Fcb->PathName.Length / sizeof(WCHAR)) + wcslen(Fcb->ObjectName)));
/* Copy short name */
Fcb->ShortNameU.Length = ShortName.Length;
Fcb->ShortNameU.MaximumLength = ShortName.Length;
Fcb->ShortNameU.Buffer = Fcb->ShortNameBuffer;
memcpy(Fcb->ShortNameBuffer, ShortName.Buffer, ShortName.Length);
if (pDirIndex)
*pDirIndex = DirIndex;
if (pOffset)
*pOffset = Offset;
DPRINT("FindFile: new Pathname %wZ, new Objectname %S, DirIndex %u\n",
&Fcb->PathName, Fcb->ObjectName, DirIndex);
RtlFreeUnicodeString(&FileToFindUpcase);
CcUnpinData(Context);
return STATUS_SUCCESS;
}
Offset += Record->RecordLength;
Record = (PDIR_RECORD)((ULONG_PTR)Record + Record->RecordLength);
DirIndex++;
}
RtlFreeUnicodeString(&FileToFindUpcase);
CcUnpinData(Context);
if (pDirIndex)
*pDirIndex = DirIndex;
if (pOffset)
*pOffset = Offset;
return STATUS_UNSUCCESSFUL;
}
NTSTATUS
NcEnumerateDirectorySetupInjection (
_Inout_ PNC_DIR_QRY_CONTEXT DirQryCtx,
_In_ PCFLT_RELATED_OBJECTS FltObjects,
_In_ PNC_INSTANCE_CONTEXT InstanceContext,
_In_ PDIRECTORY_CONTROL_OFFSETS Offsets,
_In_ FILE_INFORMATION_CLASS InformationClass
)
/*++
Routine Description:
Sets up directory enumeration context cache so that we are ready to
perform injection.
Arguments:
DirQryCtx - Pointer to directory query context (on the stream handle.)
FltObjects - FltObjects structure for this operation.
InstanceContext - Instance Context for this operation.
Offsets - Offsets structure for this information class.
InformationClass - The information class for this operation.
Return Value:
Returns STATUS_SUCCESS on success, otherwise an appropriate error code.
--*/
{
NTSTATUS Status;
OBJECT_ATTRIBUTES RealParentAttributes;
HANDLE RealParentHandle = 0; //close always
PFILE_OBJECT RealParentFileObj = NULL;
IO_STATUS_BLOCK RealParentStatusBlock;
char * QueryBuffer = NULL; //free on error, when no injection
ULONG QueryBufferLength = 0;
USHORT NameLength;
ULONG QueryBufferLengthRead;
BOOLEAN IgnoreCase = !BooleanFlagOn( FltObjects->FileObject->Flags,
FO_OPENED_CASE_SENSITIVE );
PAGED_CODE();
//
// If the user has specified a search string, and if our user mapping
// should not be returned in this search string, return success. We
// don't need to inject anything.
//
if (DirQryCtx->SearchString.Length > 0 &&
!FsRtlIsNameInExpression( &DirQryCtx->SearchString,
&InstanceContext->Mapping.UserMapping.LongNamePath.FinalComponentName,
IgnoreCase,
NULL ) &&
!FsRtlIsNameInExpression( &DirQryCtx->SearchString,
&InstanceContext->Mapping.UserMapping.ShortNamePath.FinalComponentName,
IgnoreCase,
NULL )) {
Status = STATUS_SUCCESS;
goto NcEnumerateDirectorySetupCleanup;
}
//
// Initialize insertion info.
//
// We have to insert the final component of the real mapping
// as the final component of the user mapping. To do this we
// will open the parent of the real mapping, and query the real
// mapping.
// Then we will overwrite the real mapping's name with
// the final component of the user mapping. This data will be
// stored in the DirQryCtx for later injection.
//
//
// Open parent of real mapping.
//
InitializeObjectAttributes( &RealParentAttributes,
&InstanceContext->Mapping.RealMapping.LongNamePath.ParentPath,
OBJ_KERNEL_HANDLE,
NULL,
NULL);
Status = NcCreateFileHelper( NcGlobalData.FilterHandle, // Filter
FltObjects->Instance, // InstanceOffsets
&RealParentHandle, // Returned Handle
&RealParentFileObj, // Returned FileObject
FILE_LIST_DIRECTORY|FILE_TRAVERSE, // Desired Access
&RealParentAttributes, // object attributes
&RealParentStatusBlock, // Returned IOStatusBlock
0, // Allocation Size
FILE_ATTRIBUTE_NORMAL, // File Attributes
0, // Share Access
FILE_OPEN, // Create Disposition
FILE_DIRECTORY_FILE, // Create Options
NULL, // Ea Buffer
0, // EA Length
IO_IGNORE_SHARE_ACCESS_CHECK, // Flags
FltObjects->FileObject ); // Transaction state
if (!NT_SUCCESS( Status )) {
goto NcEnumerateDirectorySetupCleanup;
}
//
// Allocate Buffer to store mapping data.
//
NameLength = Max( InstanceContext->Mapping.RealMapping.LongNamePath.FinalComponentName.Length,
InstanceContext->Mapping.UserMapping.LongNamePath.FinalComponentName.Length );
QueryBufferLength = Offsets->FileNameDist + NameLength;
QueryBuffer = ExAllocatePoolWithTag( PagedPool, QueryBufferLength, NC_DIR_QRY_CACHE_TAG );
if (QueryBuffer == NULL) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto NcEnumerateDirectorySetupCleanup;
}
//
// Query the information from the parent of the real mapping.
//
Status = NcQueryDirectoryFile( FltObjects->Instance,
RealParentFileObj,
QueryBuffer,
QueryBufferLength,
InformationClass,
TRUE,//Return single entry
&InstanceContext->Mapping.RealMapping.LongNamePath.FinalComponentName,
FALSE,//restart scan
&QueryBufferLengthRead);
if (Status == STATUS_NO_SUCH_FILE) {
//
// The user mapping does not exist, this is allowed. It means we
// have nothing to inject.
//
DirQryCtx->InjectionEntry.Buffer = NULL;
DirQryCtx->InjectionEntry.CurrentOffset = 0;
ExFreePoolWithTag( QueryBuffer, NC_DIR_QRY_CACHE_TAG );
QueryBuffer = NULL;
Status = STATUS_SUCCESS;
} else if (!NT_SUCCESS( Status )) {
//
// An unexpected error occurred, return code.
//
goto NcEnumerateDirectorySetupCleanup;
} else {
//
// Now we have to munge the real mapping directory entry into a
// user mapping directory entry.
//
NcSetFileName( QueryBuffer,
InstanceContext->Mapping.UserMapping.LongNamePath.FinalComponentName.Buffer,
InstanceContext->Mapping.UserMapping.LongNamePath.FinalComponentName.Length,
Offsets,
TRUE );
NcSetShortName( QueryBuffer,
InstanceContext->Mapping.UserMapping.ShortNamePath.FinalComponentName.Buffer,
InstanceContext->Mapping.UserMapping.ShortNamePath.FinalComponentName.Length,
Offsets );
FLT_ASSERT( DirQryCtx->InjectionEntry.Buffer == NULL );
//
// Set the injection entry up in the cache.
//
DirQryCtx->InjectionEntry.Buffer = QueryBuffer;
DirQryCtx->InjectionEntry.CurrentOffset = 0;
}
NcEnumerateDirectorySetupCleanup:
if (!NT_SUCCESS( Status )) {
if(QueryBuffer != NULL) {
ExFreePoolWithTag( QueryBuffer, NC_DIR_QRY_CACHE_TAG );
}
}
if (RealParentHandle != NULL) {
FltClose( RealParentHandle );
}
if (RealParentFileObj != NULL) {
ObDereferenceObject( RealParentFileObj );
}
return Status;
}
/*************************************************************************
*
* Function: Ext2QueryDirectory()
*
* Description:
* Query directory request.
*
* Expected Interrupt Level (for execution) :
*
* IRQL_PASSIVE_LEVEL
*
* Return Value: STATUS_SUCCESS/Error
*
*************************************************************************/
NTSTATUS NTAPI Ext2QueryDirectory(
PtrExt2IrpContext PtrIrpContext,
PIRP PtrIrp,
#ifdef _GNU_NTIFS_
PEXTENDED_IO_STACK_LOCATION PtrIoStackLocation,
#else
PIO_STACK_LOCATION PtrIoStackLocation,
#endif
PFILE_OBJECT PtrFileObject,
PtrExt2FCB PtrFCB,
PtrExt2CCB PtrCCB)
{
NTSTATUS RC = STATUS_SUCCESS;
BOOLEAN PostRequest = FALSE;
PtrExt2NTRequiredFCB PtrReqdFCB = NULL;
BOOLEAN CanWait = FALSE;
PtrExt2VCB PtrVCB = NULL;
BOOLEAN AcquiredFCB = FALSE;
unsigned long BufferLength = 0;
unsigned long BufferIndex = 0;
unsigned long FileIndex = 0;
PUNICODE_STRING PtrSearchPattern = NULL;
FILE_INFORMATION_CLASS FileInformationClass;
BOOLEAN RestartScan = FALSE;
BOOLEAN ReturnSingleEntry = FALSE;
BOOLEAN IndexSpecified = FALSE;
unsigned char *Buffer = NULL;
BOOLEAN FirstTimeQuery = FALSE;
unsigned long StartingIndexForSearch = 0;
unsigned long BytesReturned = 0;
BOOLEAN BufferUsedup = FALSE;
BOOLEAN SearchWithWildCards = FALSE;
PFILE_BOTH_DIR_INFORMATION BothDirInformation = NULL;
PFILE_DIRECTORY_INFORMATION DirectoryInformation = NULL;
PEXT2_DIR_ENTRY PtrDirEntry = NULL;
PEXT2_INODE PtrInode = NULL;
unsigned long LogicalBlockSize;
unsigned long ThisBlock;
// The starting Physical Block No...
//LARGE_INTEGER StartPhysicalBlock;
LARGE_INTEGER StartBufferOffset ;
ULONG PinBufferLength;
// Buffer Control Block
PBCB PtrBCB = NULL;
BYTE * PtrPinnedBlockBuffer = NULL;
unsigned int j;
DebugTrace(DEBUG_TRACE_MISC, " === Querying Directory %S", PtrFCB->FCBName->ObjectName.Buffer );
try
{
// Validate the sent-in FCB
if ((PtrFCB->NodeIdentifier.NodeType == EXT2_NODE_TYPE_VCB) || !(PtrFCB->FCBFlags & EXT2_FCB_DIRECTORY))
{
// We will only allow notify requests on directories.
RC = STATUS_INVALID_PARAMETER;
}
PtrReqdFCB = &(PtrFCB->NTRequiredFCB);
CanWait = ((PtrIrpContext->IrpContextFlags & EXT2_IRP_CONTEXT_CAN_BLOCK) ? TRUE : FALSE);
PtrVCB = PtrFCB->PtrVCB;
//
// Asynchronous IO requested
// Posting request...
//
/*
* This is incorrect because posted IRP_MJ_DIRECTORY_CONTROL
* requests aren't handled in the worker thread yet. I tried
* adding handling of them to the worked routine, but there
* were problems with accessing the PtrIoStackLocation->
* Parameters.QueryDirectory.FileName variable.
* -- Filip Navara, 18/08/2004
*/
#if 0
if (!CanWait)
{
PostRequest = TRUE;
try_return(RC = STATUS_PENDING);
}
#endif
// Obtain the callers parameters
BufferLength = PtrIoStackLocation->Parameters.QueryDirectory.Length;
PtrSearchPattern = ( PUNICODE_STRING ) PtrIoStackLocation->Parameters.QueryDirectory.FileName;
FileInformationClass = PtrIoStackLocation->Parameters.QueryDirectory.FileInformationClass;
FileIndex = PtrIoStackLocation->Parameters.QueryDirectory.FileIndex;
// Some additional arguments that affect the FSD behavior
RestartScan = (PtrIoStackLocation->Flags & SL_RESTART_SCAN);
ReturnSingleEntry = (PtrIoStackLocation->Flags & SL_RETURN_SINGLE_ENTRY);
IndexSpecified = (PtrIoStackLocation->Flags & SL_INDEX_SPECIFIED);
//
// Acquiring exclusive access to the FCB.
// This is not mandatory
//
DebugTrace(DEBUG_TRACE_MISC, "*** Going into a block to acquire FCB Exclusively[DirCtrl]", 0);
DebugTraceState( "FCBMain AC:0x%LX SW:0x%LX EX:0x%LX [DirCtrl]", PtrReqdFCB->MainResource.ActiveCount, PtrReqdFCB->MainResource.NumberOfExclusiveWaiters, PtrReqdFCB->MainResource.NumberOfSharedWaiters );
ExAcquireResourceExclusiveLite(&(PtrReqdFCB->MainResource), TRUE);
DebugTrace(DEBUG_TRACE_MISC, "*** FCB acquired [DirCtrl]", 0);
AcquiredFCB = TRUE;
// We must determine the buffer pointer to be used. Since this
// routine could either be invoked directly in the context of the
// calling thread, or in the context of a worker thread, here is
// a general way of determining what we should use.
Buffer = Ext2GetCallersBuffer ( PtrIrp );
// The method of determining where to look from and what to look for is
// unfortunately extremely confusing. However, here is a methodology you
// you can broadly adopt:
// (a) You have to maintain a search buffer per CCB structure.
// (b) This search buffer is initialized the very first time
// a query directory operation is performed using the file object.
// (For the sample FSD, the search buffer is stored in the
// DirectorySearchPattern field)
// However, the caller still has the option of "overriding" this stored
// search pattern by supplying a new one in a query directory operation.
//
if( PtrCCB->DirectorySearchPattern.Length )
{
if( PtrCCB->DirectorySearchPattern.Buffer[PtrCCB->DirectorySearchPattern.Length/2] != 0 )
{
DebugTrace(DEBUG_TRACE_MISC, "&&&&&&&&& PtrCCB->DirectorySearchPattern not NULL terminated!", 0);
}
DebugTrace(DEBUG_TRACE_MISC, " === Old Search pattern %S", PtrCCB->DirectorySearchPattern.Buffer );
}
if (PtrSearchPattern != NULL)
{
// User has supplied a search pattern
// Now validate that the search pattern is legitimate
if ( PtrCCB->DirectorySearchPattern.Length == 0 )
{
// This must be the very first query request.
FirstTimeQuery = TRUE;
}
else
{
// We should ignore the search pattern in the CCB and instead,
// use the user-supplied pattern for this particular query
// directory request.
Ext2DeallocateUnicodeString( &PtrCCB->DirectorySearchPattern );
}
// Now, allocate enough memory to contain the caller
// supplied search pattern and fill in the DirectorySearchPattern
// field in the CCB
Ext2CopyUnicodeString( &PtrCCB->DirectorySearchPattern, PtrSearchPattern );
/*
PtrCCB->DirectorySearchPattern = Ext2AllocatePool(PagedPool, sizeof( PtrSearchPattern ) );
ASSERT(PtrCCB->DirectorySearchPattern);
RtlCopyMemory( PtrCCB->DirectorySearchPattern, PtrSearchPattern, sizeof( PtrSearchPattern ) );
*/
}
else if ( PtrCCB->DirectorySearchPattern.Length == 0 )
{
// This MUST be the first directory query operation (else the
// DirectorySearchPattern field would never be empty. Also, the caller
// has neglected to provide a pattern so we MUST invent one.
// Use "*" (following NT conventions) as your search pattern
// and store it in the PtrCCB->DirectorySearchPattern field.
/*
PtrCCB->DirectorySearchPattern = Ext2AllocatePool(PagedPool, sizeof(L"*") );
ASSERT(PtrCCB->DirectorySearchPattern);
RtlCopyMemory( PtrCCB->DirectorySearchPattern, L"*", 4 );*/
Ext2CopyWideCharToUnicodeString( &PtrCCB->DirectorySearchPattern, L"*" );
FirstTimeQuery = TRUE;
}
else
{
// The caller has not supplied any search pattern...
// Using previously supplied pattern
PtrSearchPattern = &PtrCCB->DirectorySearchPattern;
}
if( PtrCCB->DirectorySearchPattern.Buffer[PtrCCB->DirectorySearchPattern.Length/2] != 0 )
{
DebugTrace(DEBUG_TRACE_MISC, "&&&&&&&&& PtrCCB->DirectorySearchPattern not NULL terminated!", 0 );
}
DebugTrace(DEBUG_TRACE_MISC, " === Search pattern %S", PtrCCB->DirectorySearchPattern.Buffer );
SearchWithWildCards = FsRtlDoesNameContainWildCards( PtrSearchPattern );
// There is one other piece of information that your FSD must store
// in the CCB structure for query directory support. This is the index
// value (i.e. the offset in your on-disk directory structure) from
// which you should start searching.
// However, the flags supplied with the IRP can make us override this
// as well.
if (FileIndex)
{
// Caller has told us wherefrom to begin.
// You may need to round this to an appropriate directory entry
// entry alignment value.
StartingIndexForSearch = FileIndex;
}
else if (RestartScan)
{
StartingIndexForSearch = 0;
}
else
{
// Get the starting offset from the CCB.
StartingIndexForSearch = PtrCCB->CurrentByteOffset.LowPart;
}
// Read in the file inode if it hasn't already been read...
Ext2InitializeFCBInodeInfo( PtrFCB );
if (PtrFileObject->PrivateCacheMap == NULL)
{
CcInitializeCacheMap(PtrFileObject, (PCC_FILE_SIZES)(&(PtrReqdFCB->CommonFCBHeader.AllocationSize)),
TRUE, // We will utilize pin access for directories
&(Ext2GlobalData.CacheMgrCallBacks), // callbacks
PtrCCB); // The context used in callbacks
}
//
// Read in the next Data Block of this directory
//
LogicalBlockSize = EXT2_MIN_BLOCK_SIZE << PtrVCB->LogBlockSize;
StartBufferOffset.QuadPart = ( StartingIndexForSearch / LogicalBlockSize );
StartBufferOffset.QuadPart *= LogicalBlockSize; // This should be the StartBufferOffset alaigned to LBlock boundary...
PinBufferLength = PtrReqdFCB->CommonFCBHeader.FileSize.LowPart - StartBufferOffset.LowPart;
if ( !CcMapData( PtrFileObject,
&StartBufferOffset,
PinBufferLength,
TRUE,
&PtrBCB,
(PVOID*)&PtrPinnedBlockBuffer ) )
{
// Read Failure
DebugTrace(DEBUG_TRACE_MISC, "Cache read failiure while reading in volume meta data", 0);
try_return();
}
else
{
DebugTrace(DEBUG_TRACE_MISC, "Cache hit while reading in volume meta data", 0);
}
PtrInode = Ext2AllocatePool( PagedPool, sizeof( EXT2_INODE ) );
//
// Walking through the directory entries...
for( BufferUsedup = FALSE, BufferIndex = 0; !BufferUsedup && StartingIndexForSearch < ( PtrFCB->NTRequiredFCB.CommonFCBHeader.FileSize.QuadPart - 1) ; )
{
PtrDirEntry = (PEXT2_DIR_ENTRY) &PtrPinnedBlockBuffer[ StartingIndexForSearch - StartBufferOffset.LowPart ];
StartingIndexForSearch += PtrDirEntry->rec_len;
PtrCCB->CurrentByteOffset.LowPart = StartingIndexForSearch;
if( PtrDirEntry->inode == 0 )
{
continue;
}
if( PtrDirEntry->name_len == 0 || PtrDirEntry->rec_len == 0 )
{
//
// This should not happen
// Hqw can this be so!!!
//
Ext2BreakPoint();
if( BothDirInformation )
{
BothDirInformation->NextEntryOffset = 0;
}
if( !BytesReturned )
{
if( FirstTimeQuery )
RC = STATUS_NO_SUCH_FILE;
else
RC = STATUS_NO_MORE_FILES;
}
break;
}
// Does this entry match the search criterian?
// Checking
//
{
UNICODE_STRING FileName;
LONG Matched = 0;
// Constructing a counted Unicode string out of PtrDirEntry
Ext2CopyCharToUnicodeString( &FileName, PtrDirEntry->name, PtrDirEntry->name_len );
if ( SearchWithWildCards )
{
Matched = FsRtlIsNameInExpression ( PtrSearchPattern, &FileName, FALSE, NULL );
}
else
{
Matched = ! RtlCompareUnicodeString( PtrSearchPattern, &FileName, FALSE );
}
Ext2DeallocateUnicodeString( &FileName );
if( !Matched )
{
continue;
}
}
switch( FileInformationClass )
{
case FileBothDirectoryInformation:
DebugTrace(DEBUG_TRACE_DIRINFO, " === FileBothDirectoryInformation", 0 );
ThisBlock = sizeof( FILE_BOTH_DIR_INFORMATION );
ThisBlock += PtrDirEntry->name_len*2;
ThisBlock = Ext2QuadAlign( ThisBlock );
if( ( BufferIndex + ThisBlock ) > BufferLength )
{
//
// Next entry won't fit into the buffer...
// will have to return...
// :(
//
if( BothDirInformation )
BothDirInformation->NextEntryOffset = 0;
if( !BytesReturned )
RC = STATUS_NO_MORE_FILES;
BufferUsedup = TRUE;
break;
}
Ext2ReadInode( PtrVCB, PtrDirEntry->inode, PtrInode );
if( !PtrInode )
{
try_return( RC = STATUS_UNSUCCESSFUL );
}
BothDirInformation = ( PFILE_BOTH_DIR_INFORMATION ) ( Buffer + ( BufferIndex ) );
BothDirInformation->EaSize = 0;
BothDirInformation->AllocationSize.QuadPart = PtrInode->i_blocks * 512;
BothDirInformation->EndOfFile.QuadPart = PtrInode->i_size;
BothDirInformation->ChangeTime.QuadPart = 0;
BothDirInformation->CreationTime.QuadPart = ( __int64 ) PtrInode->i_ctime * 10000000;
BothDirInformation->CreationTime.QuadPart += Ext2GlobalData.TimeDiff.QuadPart;
BothDirInformation->LastAccessTime.QuadPart = Ext2GlobalData.TimeDiff.QuadPart + ( ( __int64 ) PtrInode->i_atime * 10000000 );
BothDirInformation->LastWriteTime.QuadPart = Ext2GlobalData.TimeDiff.QuadPart + ( ( __int64 )PtrInode->i_mtime * 10000000 );
// Getting the file type...
BothDirInformation->FileAttributes = FILE_ATTRIBUTE_NORMAL;
if( ! Ext2IsModeRegularFile( PtrInode->i_mode ) )
{
// Not a reqular file...
if( Ext2IsModeDirectory( PtrInode->i_mode) )
{
// Directory...
BothDirInformation->FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
}
else
{
// Special File...
// Treated with respect... ;)
//
BothDirInformation->FileAttributes |= ( FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_READONLY);
// FILE_ATTRIBUTE_DEVICE
}
if ( Ext2IsModeHidden( PtrInode->i_mode ) )
{
BothDirInformation->FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
}
if ( Ext2IsModeReadOnly( PtrInode->i_mode ) )
{
BothDirInformation->FileAttributes |= FILE_ATTRIBUTE_READONLY;
}
}
BothDirInformation->FileIndex = StartingIndexForSearch;
BothDirInformation->FileNameLength = PtrDirEntry->name_len*2 + 2;
BothDirInformation->ShortNameLength = 0;
BothDirInformation->ShortName[0] = 0;
// Copying out the name as WCHAR null terminated strings
for( j = 0; j< PtrDirEntry->name_len ; j ++ )
{
// BothDirInformation->ShortName[ j ] = PtrDirEntry->name[j];
BothDirInformation->FileName[ j ] = PtrDirEntry->name[j];
// if( j < 11 )
// BothDirInformation->ShortName[j] = PtrDirEntry->name[j];
}
/*
if( j < 11 )
{
BothDirInformation->ShortNameLength = j * 2 + 2;
BothDirInformation->ShortName[ j ] = 0;
}
else
{
BothDirInformation->ShortNameLength = 24;
BothDirInformation->ShortName[ 11 ] = 0;
}*/
BothDirInformation->FileName[ j ] = 0;
BytesReturned += ThisBlock;
BufferIndex += ThisBlock;
if( !ReturnSingleEntry && ( StartingIndexForSearch < ( PtrFCB->NTRequiredFCB.CommonFCBHeader.FileSize.QuadPart - 1) ))
BothDirInformation->NextEntryOffset = ThisBlock;
else
BothDirInformation->NextEntryOffset = 0;
break;
case FileDirectoryInformation:
// DirectoryInformation
DebugTrace(DEBUG_TRACE_DIRINFO, " === FileDirectoryInformation", 0 );
ThisBlock = sizeof( FILE_DIRECTORY_INFORMATION );
ThisBlock += PtrDirEntry->name_len*2;
ThisBlock = Ext2QuadAlign( ThisBlock );
if( ( BufferIndex + ThisBlock ) > BufferLength )
{
//
// Next entry won't fit into the buffer...
// will have to return...
// :(
//
if( DirectoryInformation )
DirectoryInformation->NextEntryOffset = 0;
if( !BytesReturned )
RC = STATUS_NO_MORE_FILES;
BufferUsedup = TRUE;
break;
}
Ext2ReadInode( PtrVCB, PtrDirEntry->inode, PtrInode );
if( !PtrInode )
{
try_return( RC = STATUS_UNSUCCESSFUL );
}
DirectoryInformation = ( PFILE_DIRECTORY_INFORMATION ) ( Buffer + ( BufferIndex ) );
DirectoryInformation->AllocationSize.QuadPart = PtrInode->i_blocks * 512;
DirectoryInformation->EndOfFile.QuadPart = PtrInode->i_size;
DirectoryInformation->ChangeTime.QuadPart = 0;
DirectoryInformation->CreationTime.QuadPart = ( __int64 ) PtrInode->i_ctime * 10000000;
DirectoryInformation->CreationTime.QuadPart += Ext2GlobalData.TimeDiff.QuadPart;
DirectoryInformation->LastAccessTime.QuadPart = Ext2GlobalData.TimeDiff.QuadPart + ( ( __int64 ) PtrInode->i_atime * 10000000 );
DirectoryInformation->LastWriteTime.QuadPart = Ext2GlobalData.TimeDiff.QuadPart + ( ( __int64 )PtrInode->i_mtime * 10000000 );
// Getting the file type...
DirectoryInformation->FileAttributes = FILE_ATTRIBUTE_NORMAL;
if( ! Ext2IsModeRegularFile( PtrInode->i_mode ) )
{
// Not a reqular file...
if( Ext2IsModeDirectory( PtrInode->i_mode) )
{
// Directory...
DirectoryInformation->FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
}
else
{
// Special File...
// Treated with respect... ;)
//
DirectoryInformation->FileAttributes |= ( FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_READONLY);
// FILE_ATTRIBUTE_DEVICE
}
if ( Ext2IsModeHidden( PtrInode->i_mode ) )
{
DirectoryInformation->FileAttributes |= FILE_ATTRIBUTE_HIDDEN;
}
if ( Ext2IsModeReadOnly( PtrInode->i_mode ) )
{
DirectoryInformation->FileAttributes |= FILE_ATTRIBUTE_READONLY;
}
}
DirectoryInformation->FileIndex = StartingIndexForSearch;
DirectoryInformation->FileNameLength = PtrDirEntry->name_len*2 + 2;
// Copying out the name as WCHAR null terminated strings
for( j = 0; j< PtrDirEntry->name_len ; j ++ )
{
DirectoryInformation->FileName[ j ] = PtrDirEntry->name[j];
}
DirectoryInformation->FileName[ j ] = 0;
BytesReturned += ThisBlock;
BufferIndex += ThisBlock;
if( !ReturnSingleEntry && ( StartingIndexForSearch < ( PtrFCB->NTRequiredFCB.CommonFCBHeader.FileSize.QuadPart - 1) ))
DirectoryInformation->NextEntryOffset = ThisBlock;
else
DirectoryInformation->NextEntryOffset = 0;
break;
case FileFullDirectoryInformation:
// FullDirInformation->
DebugTrace(DEBUG_TRACE_DIRINFO, " === FileFullDirectoryInformation - Not handled", 0 );
try_return();
case FileNamesInformation:
// NamesInformation->
DebugTrace(DEBUG_TRACE_DIRINFO, " === FileNamesInformation - Not handled", 0 );
try_return();
default:
DebugTrace(DEBUG_TRACE_DIRINFO, " === Invalid Dir Info class - Not handled", 0 );
try_return( RC = STATUS_INVALID_INFO_CLASS );
}
if( ReturnSingleEntry )
{
break;
}
}// end of for...
if( !BytesReturned && StartingIndexForSearch >= ( PtrFCB->NTRequiredFCB.CommonFCBHeader.FileSize.QuadPart) )
{
Ext2DeallocateUnicodeString( &PtrCCB->DirectorySearchPattern );
PtrCCB->CurrentByteOffset.QuadPart = 0;
if( FirstTimeQuery )
RC = STATUS_NO_SUCH_FILE;
else
RC = STATUS_NO_MORE_FILES;
try_return();
}
else if( BytesReturned )
{
BothDirInformation->NextEntryOffset = 0;
}
try_exit: NOTHING;
}
finally
{
if( PtrInode )
{
DebugTrace( DEBUG_TRACE_FREE, "Freeing = %lX [DirCtrl]", PtrInode );
ExFreePool( PtrInode );
}
if( PtrBCB )
{
CcUnpinData( PtrBCB );
PtrBCB = NULL;
}
if (PostRequest)
{
if (AcquiredFCB)
{
Ext2ReleaseResource(&(PtrReqdFCB->MainResource));
DebugTrace(DEBUG_TRACE_MISC, "*** FCB Released in [DirCtrl]", 0);
DebugTraceState( "FCBMain AC:0x%LX SW:0x%LX EX:0x%LX [DirCtrl]",
PtrReqdFCB->MainResource.ActiveCount,
PtrReqdFCB->MainResource.NumberOfExclusiveWaiters,
PtrReqdFCB->MainResource.NumberOfSharedWaiters );
}
// Map the users buffer and then post the request.
RC = Ext2LockCallersBuffer(PtrIrp, TRUE, BufferLength);
ASSERT(NT_SUCCESS(RC));
RC = Ext2PostRequest(PtrIrpContext, PtrIrp);
}
else if (!(PtrIrpContext->IrpContextFlags &
EXT2_IRP_CONTEXT_EXCEPTION))
{
if (AcquiredFCB)
{
Ext2ReleaseResource(&(PtrReqdFCB->MainResource));
DebugTrace(DEBUG_TRACE_MISC, "*** FCB Released [DirCtrl]", 0);
DebugTraceState( "FCBMain AC:0x%LX SW:0x%LX EX:0x%LX [DirCtrl]",
PtrReqdFCB->MainResource.ActiveCount,
PtrReqdFCB->MainResource.NumberOfExclusiveWaiters,
PtrReqdFCB->MainResource.NumberOfSharedWaiters );
}
// Complete the request.
PtrIrp->IoStatus.Status = RC;
PtrIrp->IoStatus.Information = BytesReturned;
// Free up the Irp Context
Ext2ReleaseIrpContext(PtrIrpContext);
// complete the IRP
IoCompleteRequest(PtrIrp, IO_DISK_INCREMENT);
}
// Flush the saved BCBs...
// Ext2FlushSavedBCBs ( PtrIrpContext );
}
return(RC);
}
NTSTATUS
NpQueryDirectory (
IN PROOT_DCB RootDcb,
IN PROOT_DCB_CCB Ccb,
IN PIRP Irp
)
/*++
Routine Description:
This is the work routine for querying a directory.
Arugments:
RootDcb - Supplies the dcb being queried
Ccb - Supplies the context of the caller
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The return status for the operation.
--*/
{
NTSTATUS Status;
PIO_STACK_LOCATION IrpSp;
PUCHAR Buffer;
CLONG SystemBufferLength;
UNICODE_STRING FileName;
ULONG FileIndex;
FILE_INFORMATION_CLASS FileInformationClass;
BOOLEAN RestartScan;
BOOLEAN ReturnSingleEntry;
BOOLEAN IndexSpecified;
static WCHAR Star = L'*';
BOOLEAN CaseInsensitive = TRUE; //*** Make searches case insensitive
ULONG CurrentIndex;
ULONG LastEntry;
ULONG NextEntry;
PLIST_ENTRY Links;
PFCB Fcb;
PFILE_DIRECTORY_INFORMATION DirInfo;
PFILE_NAMES_INFORMATION NamesInfo;
PAGED_CODE();
//
// Get the current stack location
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
DebugTrace(+1, Dbg, "NpQueryDirectory\n", 0 );
DebugTrace( 0, Dbg, "RootDcb = %08lx\n", RootDcb);
DebugTrace( 0, Dbg, "Ccb = %08lx\n", Ccb);
DebugTrace( 0, Dbg, "SystemBuffer = %08lx\n", Irp->AssociatedIrp.SystemBuffer);
DebugTrace( 0, Dbg, "Length = %08lx\n", IrpSp->Parameters.QueryDirectory.Length);
DebugTrace( 0, Dbg, "FileName = %Z\n", IrpSp->Parameters.QueryDirectory.FileName);
DebugTrace( 0, Dbg, "FileIndex = %08lx\n", IrpSp->Parameters.QueryDirectory.FileIndex);
DebugTrace( 0, Dbg, "FileInformationClass = %08lx\n", IrpSp->Parameters.QueryDirectory.FileInformationClass);
DebugTrace( 0, Dbg, "RestartScan = %08lx\n", FlagOn(IrpSp->Flags, SL_RESTART_SCAN));
DebugTrace( 0, Dbg, "ReturnSingleEntry = %08lx\n", FlagOn(IrpSp->Flags, SL_RETURN_SINGLE_ENTRY));
DebugTrace( 0, Dbg, "IndexSpecified = %08lx\n", FlagOn(IrpSp->Flags, SL_INDEX_SPECIFIED));
//
// Save references to the input parameters within the Irp
//
SystemBufferLength = IrpSp->Parameters.QueryDirectory.Length;
FileIndex = IrpSp->Parameters.QueryDirectory.FileIndex;
FileInformationClass = IrpSp->Parameters.QueryDirectory.FileInformationClass;
RestartScan = BooleanFlagOn(IrpSp->Flags, SL_RESTART_SCAN);
ReturnSingleEntry = BooleanFlagOn(IrpSp->Flags, SL_RETURN_SINGLE_ENTRY);
IndexSpecified = BooleanFlagOn(IrpSp->Flags, SL_INDEX_SPECIFIED);
if (IrpSp->Parameters.QueryDirectory.FileName != NULL) {
FileName = *(PUNICODE_STRING)IrpSp->Parameters.QueryDirectory.FileName;
} else {
FileName.Length = 0;
FileName.Buffer = NULL;
}
//
// Check if the ccb already has a query template attached. If it
// does not already have one then we either use the string we are
// given or we attach our own containing "*"
//
if (Ccb->QueryTemplate == NULL) {
//
// This is our first time calling query directory so we need
// to either set the query template to the user specified string
// or to "*"
//
if (FileName.Buffer == NULL) {
DebugTrace(0, Dbg, "Set template to *\n", 0);
FileName.Length = 2;
FileName.Buffer = ⋆
}
DebugTrace(0, Dbg, "Set query template -> %Z\n", &FileName);
//
// Allocate space for the query template
//
Ccb->QueryTemplate = FsRtlAllocatePool( PagedPool,
sizeof(UNICODE_STRING) + FileName.Length );
//
// Initialize the query template and copy over the string
//
Ccb->QueryTemplate->Length = FileName.Length;
Ccb->QueryTemplate->Buffer = (PWCH)Ccb->QueryTemplate +
sizeof(UNICODE_STRING) / sizeof(WCHAR);
RtlCopyMemory( Ccb->QueryTemplate->Buffer,
FileName.Buffer,
FileName.Length );
//
// Now zero out the FileName so we won't think we're to use it
// as a subsearch string.
//
FileName.Length = 0;
FileName.Buffer = NULL;
}
//
// Check if we were given an index to start with or if we need to
// restart the scan or if we should use the index that was saved in
// the ccb
//
if (RestartScan) {
FileIndex = 0;
} else if (!IndexSpecified) {
FileIndex = Ccb->IndexOfLastCcbReturned + 1;
}
//
// Now we are committed to completing the Irp, we do that in
// the finally clause of the following try.
//
try {
ULONG BaseLength;
ULONG LengthAdded;
//
// Map the user buffer.
//
Buffer = NpMapUserBuffer( Irp );
//
// At this point we are about to enter our query loop. We have
// already decided which Fcb index we need to return. The variables
// LastEntry and NextEntry are used to index into the user buffer.
// LastEntry is the last entry we added to the user buffer, and
// NextEntry is the current one we're working on. CurrentIndex
// is the Fcb index that we are looking at next. Logically the
// way the loop works is as follows.
//
// Scan all of the Fcb in the directory
//
// if the Fcb matches the query template then
//
// if the CurrentIndex is >= the FileIndex then
//
// process this fcb, and decide if we should
// continue the main loop
//
// end if
//
// Increment the current index
//
// end if
//
// end scan
//
CurrentIndex = 0;
LastEntry = 0;
NextEntry =0;
switch (FileInformationClass) {
case FileDirectoryInformation:
BaseLength = FIELD_OFFSET( FILE_DIRECTORY_INFORMATION,
FileName[0] );
break;
case FileFullDirectoryInformation:
BaseLength = FIELD_OFFSET( FILE_FULL_DIR_INFORMATION,
FileName[0] );
break;
case FileNamesInformation:
BaseLength = FIELD_OFFSET( FILE_NAMES_INFORMATION,
FileName[0] );
break;
case FileBothDirectoryInformation:
BaseLength = FIELD_OFFSET( FILE_BOTH_DIR_INFORMATION,
FileName[0] );
break;
default:
try_return( Status = STATUS_INVALID_INFO_CLASS );
}
for (Links = RootDcb->Specific.Dcb.ParentDcbQueue.Flink;
Links != &RootDcb->Specific.Dcb.ParentDcbQueue;
Links = Links->Flink) {
Fcb = CONTAINING_RECORD(Links, FCB, ParentDcbLinks);
ASSERT(Fcb->NodeTypeCode == NPFS_NTC_FCB);
DebugTrace(0, Dbg, "Top of Loop\n", 0);
DebugTrace(0, Dbg, "Fcb = %08lx\n", Fcb);
DebugTrace(0, Dbg, "CurrentIndex = %08lx\n", CurrentIndex);
DebugTrace(0, Dbg, "FileIndex = %08lx\n", FileIndex);
DebugTrace(0, Dbg, "LastEntry = %08lx\n", LastEntry);
DebugTrace(0, Dbg, "NextEntry = %08lx\n", NextEntry);
//
// Check if the Fcb represents a named pipe that is part of
// our query template
//
if (FsRtlIsNameInExpression( Ccb->QueryTemplate,
&Fcb->LastFileName,
CaseInsensitive,
NULL )) {
//
// The fcb is in the query template so now check if
// this is the index we should start returning
//
if (CurrentIndex >= FileIndex) {
ULONG BytesToCopy;
ULONG BytesRemainingInBuffer;
//
// Here are the rules concerning filling up the buffer:
//
// 1. The Io system garentees that there will always be
// enough room for at least one base record.
//
// 2. If the full first record (including file name) cannot
// fit, as much of the name as possible is copied and
// STATUS_BUFFER_OVERFLOW is returned.
//
// 3. If a subsequent record cannot completely fit into the
// buffer, none of it (as in 0 bytes) is copied, and
// STATUS_SUCCESS is returned. A subsequent query will
// pick up with this record.
//
BytesRemainingInBuffer = SystemBufferLength - NextEntry;
if ( (NextEntry != 0) &&
( (BaseLength + Fcb->LastFileName.Length > BytesRemainingInBuffer) ||
(SystemBufferLength < NextEntry) ) ) {
DebugTrace(0, Dbg, "Next entry won't fit\n", 0);
try_return( Status = STATUS_SUCCESS );
}
ASSERT( BytesRemainingInBuffer >= BaseLength );
//
// See how much of the name we will be able to copy into
// the system buffer. This also dictates out return
// value.
//
if ( BaseLength + Fcb->LastFileName.Length <=
BytesRemainingInBuffer ) {
BytesToCopy = Fcb->LastFileName.Length;
Status = STATUS_SUCCESS;
} else {
BytesToCopy = BytesRemainingInBuffer - BaseLength;
Status = STATUS_BUFFER_OVERFLOW;
}
//
// Note how much of buffer we are consuming and zero
// the base part of the structure.
//
LengthAdded = BaseLength + BytesToCopy;
RtlZeroMemory( &Buffer[NextEntry], BaseLength );
//
// Now fill the base parts of the strucure that are
// applicable.
//
switch (FileInformationClass) {
case FileBothDirectoryInformation:
//
// We don't need short name
//
DebugTrace(0, Dbg, "Getting directory full information\n", 0);
case FileFullDirectoryInformation:
//
// We don't use EaLength, so fill in nothing here.
//
DebugTrace(0, Dbg, "Getting directory full information\n", 0);
case FileDirectoryInformation:
DebugTrace(0, Dbg, "Getting directory information\n", 0);
//
// The eof indicates the number of instances and
// allocation size is the maximum allowed
//
DirInfo = (PFILE_DIRECTORY_INFORMATION)&Buffer[NextEntry];
DirInfo->EndOfFile.QuadPart = Fcb->OpenCount;
DirInfo->AllocationSize.QuadPart = Fcb->Specific.Fcb.MaximumInstances;
DirInfo->FileAttributes = FILE_ATTRIBUTE_NORMAL;
DirInfo->FileNameLength = Fcb->LastFileName.Length;
break;
case FileNamesInformation:
DebugTrace(0, Dbg, "Getting names information\n", 0);
NamesInfo = (PFILE_NAMES_INFORMATION)&Buffer[NextEntry];
NamesInfo->FileNameLength = Fcb->LastFileName.Length;
break;
default:
NpBugCheck( FileInformationClass, 0, 0 );
}
RtlCopyMemory( &Buffer[NextEntry + BaseLength],
Fcb->LastFileName.Buffer,
BytesToCopy );
//
// Update the ccb to the index we've just used
//
Ccb->IndexOfLastCcbReturned = CurrentIndex;
//
// And indicate how much of the system buffer we have
// currently used up. We must compute this value before
// we long align outselves for the next entry
//
Irp->IoStatus.Information = NextEntry + LengthAdded;
//
// Setup the previous next entry offset
//
*((PULONG)(&Buffer[LastEntry])) = NextEntry - LastEntry;
//
// Check if the last entry didn't completely fit
//
if ( Status == STATUS_BUFFER_OVERFLOW ) {
try_return( NOTHING );
}
//
// Check if we are only to return a single entry
//
if (ReturnSingleEntry) {
try_return( Status = STATUS_SUCCESS );
}
//
// Set ourselves up for the next iteration
//
LastEntry = NextEntry;
NextEntry += (ULONG)QuadAlign( LengthAdded );
}
//
// Increment the current index by one
//
CurrentIndex += 1;
}
}
//
// At this point we've scanned the entire list of Fcb so if
// the NextEntry is zero then we haven't found anything so we
// will return no more files, otherwise we return success.
//
if (NextEntry == 0) {
Status = STATUS_NO_MORE_FILES;
} else {
Status = STATUS_SUCCESS;
}
try_exit: NOTHING;
} finally {
if (!AbnormalTermination()) {
NpCompleteRequest( Irp, Status );
}
DebugTrace(-1, Dbg, "NpQueryDirectory -> %08lx\n", Status);
}
return Status;
}
BOOLEAN
CdIsNameInExpression (
IN PIRP_CONTEXT IrpContext,
IN PCD_NAME CurrentName,
IN PCD_NAME SearchExpression,
IN ULONG WildcardFlags,
IN BOOLEAN CheckVersion
)
/*++
Routine Description:
This routine will compare two CdName strings. We assume that if this
is to be a case-insensitive search then they are already upcased.
We compare the filename portions of the name and if they match we
compare the version strings if requested.
Arguments:
CurrentName - Filename from the disk.
SearchExpression - Filename expression to use for match.
WildcardFlags - Flags field which indicates which parts of the
search expression might have wildcards. These flags are the
same as in the Ccb flags field.
CheckVersion - Indicates whether we should check both the name and the
version strings or just the name.
Return Value:
BOOLEAN - TRUE if the expressions match, FALSE otherwise.
--*/
{
BOOLEAN Match = TRUE;
PAGED_CODE();
//
// If there are wildcards in the expression then we call the
// appropriate FsRtlRoutine.
//
if (FlagOn( WildcardFlags, CCB_FLAG_ENUM_NAME_EXP_HAS_WILD )) {
Match = FsRtlIsNameInExpression( &SearchExpression->FileName,
&CurrentName->FileName,
FALSE,
NULL );
//
// Otherwise do a direct memory comparison for the name string.
//
} else {
if ((CurrentName->FileName.Length != SearchExpression->FileName.Length) ||
(!RtlEqualMemory( CurrentName->FileName.Buffer,
SearchExpression->FileName.Buffer,
CurrentName->FileName.Length ))) {
Match = FALSE;
}
}
//
// Check the version numbers if requested by the user and we have a
// match on the name and the version number is present.
//
if (Match && CheckVersion && SearchExpression->VersionString.Length &&
!FlagOn( WildcardFlags, CCB_FLAG_ENUM_VERSION_MATCH_ALL )) {
//
// If there are wildcards in the expression then call the
// appropriate search expression.
//
if (FlagOn( WildcardFlags, CCB_FLAG_ENUM_VERSION_EXP_HAS_WILD )) {
Match = FsRtlIsNameInExpression( &SearchExpression->VersionString,
&CurrentName->VersionString,
FALSE,
NULL );
//
// Otherwise do a direct memory comparison for the name string.
//
} else {
if ((CurrentName->VersionString.Length != SearchExpression->VersionString.Length) ||
(!RtlEqualMemory( CurrentName->VersionString.Buffer,
SearchExpression->VersionString.Buffer,
CurrentName->VersionString.Length ))) {
Match = FALSE;
}
}
}
return Match;
}