VOID DokanCompleteSetInformation(__in PIRP_ENTRY IrpEntry,
__in PEVENT_INFORMATION EventInfo) {
PIRP irp;
PIO_STACK_LOCATION irpSp;
NTSTATUS status;
ULONG info = 0;
PDokanCCB ccb;
PDokanFCB fcb = NULL;
UNICODE_STRING oldFileName;
FILE_INFORMATION_CLASS infoClass;
irp = IrpEntry->Irp;
status = EventInfo->Status;
__try {
DDbgPrint("==> DokanCompleteSetInformation\n");
irpSp = IrpEntry->IrpSp;
ccb = IrpEntry->FileObject->FsContext2;
ASSERT(ccb != NULL);
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite(&ccb->Resource, TRUE);
fcb = ccb->Fcb;
ASSERT(fcb != NULL);
DokanFCBLockRW(fcb);
ccb->UserContext = EventInfo->Context;
info = EventInfo->BufferLength;
infoClass = irpSp->Parameters.SetFile.FileInformationClass;
RtlZeroMemory(&oldFileName, sizeof(UNICODE_STRING));
if (NT_SUCCESS(status)) {
if (infoClass == FileDispositionInformation) {
if (EventInfo->Operation.Delete.DeleteOnClose) {
if (!MmFlushImageSection(&fcb->SectionObjectPointers,
MmFlushForDelete)) {
DDbgPrint(" Cannot delete user mapped image\n");
status = STATUS_CANNOT_DELETE;
} else {
DokanCCBFlagsSetBit(ccb, DOKAN_DELETE_ON_CLOSE);
DokanFCBFlagsSetBit(fcb, DOKAN_DELETE_ON_CLOSE);
DDbgPrint(" FileObject->DeletePending = TRUE\n");
IrpEntry->FileObject->DeletePending = TRUE;
}
} else {
DokanCCBFlagsClearBit(ccb, DOKAN_DELETE_ON_CLOSE);
DokanFCBFlagsClearBit(fcb, DOKAN_DELETE_ON_CLOSE);
DDbgPrint(" FileObject->DeletePending = FALSE\n");
IrpEntry->FileObject->DeletePending = FALSE;
}
}
// if rename is executed, reassign the file name
if (infoClass == FileRenameInformation) {
PVOID buffer = NULL;
// this is used to inform rename in the bellow switch case
oldFileName.Buffer = fcb->FileName.Buffer;
oldFileName.Length = (USHORT)fcb->FileName.Length;
oldFileName.MaximumLength = (USHORT)fcb->FileName.Length;
// copy new file name
buffer = ExAllocatePool(EventInfo->BufferLength + sizeof(WCHAR));
if (buffer == NULL) {
status = STATUS_INSUFFICIENT_RESOURCES;
ExReleaseResourceLite(&ccb->Resource);
KeLeaveCriticalRegion();
__leave;
}
fcb->FileName.Buffer = buffer;
ASSERT(fcb->FileName.Buffer != NULL);
RtlZeroMemory(fcb->FileName.Buffer,
EventInfo->BufferLength + sizeof(WCHAR));
RtlCopyMemory(fcb->FileName.Buffer, EventInfo->Buffer,
EventInfo->BufferLength);
fcb->FileName.Length = (USHORT)EventInfo->BufferLength;
fcb->FileName.MaximumLength = (USHORT)EventInfo->BufferLength;
}
}
ExReleaseResourceLite(&ccb->Resource);
KeLeaveCriticalRegion();
if (NT_SUCCESS(status)) {
switch (irpSp->Parameters.SetFile.FileInformationClass) {
case FileAllocationInformation:
DokanNotifyReportChange(fcb, FILE_NOTIFY_CHANGE_SIZE,
FILE_ACTION_MODIFIED);
break;
case FileBasicInformation:
DokanNotifyReportChange(fcb, FILE_NOTIFY_CHANGE_ATTRIBUTES |
FILE_NOTIFY_CHANGE_LAST_WRITE |
FILE_NOTIFY_CHANGE_LAST_ACCESS |
FILE_NOTIFY_CHANGE_CREATION,
FILE_ACTION_MODIFIED);
break;
case FileDispositionInformation:
if (IrpEntry->FileObject->DeletePending) {
if (DokanFCBFlagsIsSet(fcb, DOKAN_FILE_DIRECTORY)) {
DokanNotifyReportChange(fcb, FILE_NOTIFY_CHANGE_DIR_NAME,
FILE_ACTION_REMOVED);
} else {
DokanNotifyReportChange(fcb, FILE_NOTIFY_CHANGE_FILE_NAME,
FILE_ACTION_REMOVED);
}
}
break;
case FileEndOfFileInformation:
DokanNotifyReportChange(fcb, FILE_NOTIFY_CHANGE_SIZE,
FILE_ACTION_MODIFIED);
break;
case FileLinkInformation:
// TODO: should check whether this is a directory
// TODO: should notify new link name
// DokanNotifyReportChange(vcb, ccb, FILE_NOTIFY_CHANGE_FILE_NAME,
// FILE_ACTION_ADDED);
break;
case FilePositionInformation:
// this is never used
break;
case FileRenameInformation: {
DokanNotifyReportChange0(fcb, &oldFileName,
FILE_NOTIFY_CHANGE_FILE_NAME,
FILE_ACTION_RENAMED_OLD_NAME);
// free old file name
ExFreePool(oldFileName.Buffer);
DokanNotifyReportChange(fcb, FILE_NOTIFY_CHANGE_FILE_NAME,
FILE_ACTION_RENAMED_NEW_NAME);
} break;
case FileValidDataLengthInformation:
DokanNotifyReportChange(fcb, FILE_NOTIFY_CHANGE_SIZE,
FILE_ACTION_MODIFIED);
break;
default:
DDbgPrint(" unknown type:%d\n",
irpSp->Parameters.SetFile.FileInformationClass);
break;
}
}
} __finally {
if(fcb)
DokanFCBUnlock(fcb);
DokanCompleteIrpRequest(irp, status, info);
DDbgPrint("<== DokanCompleteSetInformation\n");
}
}
NTSTATUS
DokanQueryDirectory(__in PDEVICE_OBJECT DeviceObject, __in PIRP Irp) {
PFILE_OBJECT fileObject;
PIO_STACK_LOCATION irpSp;
PDokanVCB vcb;
PDokanCCB ccb;
PDokanFCB fcb;
NTSTATUS status;
ULONG eventLength;
PEVENT_CONTEXT eventContext;
ULONG index;
BOOLEAN initial;
ULONG flags = 0;
irpSp = IoGetCurrentIrpStackLocation(Irp);
fileObject = irpSp->FileObject;
vcb = DeviceObject->DeviceExtension;
if (GetIdentifierType(vcb) != VCB) {
return STATUS_INVALID_PARAMETER;
}
ccb = fileObject->FsContext2;
if (ccb == NULL) {
return STATUS_INVALID_PARAMETER;
}
ASSERT(ccb != NULL);
if (irpSp->Flags & SL_INDEX_SPECIFIED) {
DDbgPrint(" index specified %d\n",
irpSp->Parameters.QueryDirectory.FileIndex);
}
if (irpSp->Flags & SL_RETURN_SINGLE_ENTRY) {
DDbgPrint(" return single entry\n");
}
if (irpSp->Flags & SL_RESTART_SCAN) {
DDbgPrint(" restart scan\n");
}
if (irpSp->Parameters.QueryDirectory.FileName) {
DDbgPrint(" pattern:%wZ\n", irpSp->Parameters.QueryDirectory.FileName);
}
switch (irpSp->Parameters.QueryDirectory.FileInformationClass) {
case FileDirectoryInformation:
DDbgPrint(" FileDirectoryInformation\n");
break;
case FileIdFullDirectoryInformation:
DDbgPrint(" FileIdFullDirectoryInformation\n");
break;
case FileFullDirectoryInformation:
DDbgPrint(" FileFullDirectoryInformation\n");
break;
case FileNamesInformation:
DDbgPrint(" FileNamesInformation\n");
break;
case FileBothDirectoryInformation:
DDbgPrint(" FileBothDirectoryInformation\n");
break;
case FileIdBothDirectoryInformation:
DDbgPrint(" FileIdBothDirectoryInformation\n");
break;
default:
DDbgPrint(" unknown FileInfoClass %d\n",
irpSp->Parameters.QueryDirectory.FileInformationClass);
break;
}
// make a MDL for UserBuffer that can be used later on another thread context
if (Irp->MdlAddress == NULL) {
status = DokanAllocateMdl(Irp, irpSp->Parameters.QueryDirectory.Length);
if (!NT_SUCCESS(status)) {
return status;
}
flags = DOKAN_MDL_ALLOCATED;
}
fcb = ccb->Fcb;
ASSERT(fcb != NULL);
DokanFCBLockRO(fcb);
// size of EVENT_CONTEXT is sum of its length and file name length
eventLength = sizeof(EVENT_CONTEXT) + fcb->FileName.Length;
initial = (BOOLEAN)(ccb->SearchPattern == NULL &&
!(DokanCCBFlagsIsSet(ccb, DOKAN_DIR_MATCH_ALL)));
// this is an initial query
if (initial) {
DDbgPrint(" initial query\n");
// and search pattern is provided
if (irpSp->Parameters.QueryDirectory.FileName) {
// free current search pattern stored in CCB
if (ccb->SearchPattern)
ExFreePool(ccb->SearchPattern);
// the size of search pattern
ccb->SearchPatternLength =
irpSp->Parameters.QueryDirectory.FileName->Length;
ccb->SearchPattern =
ExAllocatePool(ccb->SearchPatternLength + sizeof(WCHAR));
if (ccb->SearchPattern == NULL) {
DokanFCBUnlock(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory(ccb->SearchPattern,
ccb->SearchPatternLength + sizeof(WCHAR));
// copy provided search pattern to CCB
RtlCopyMemory(ccb->SearchPattern,
irpSp->Parameters.QueryDirectory.FileName->Buffer,
ccb->SearchPatternLength);
} else {
DokanCCBFlagsSetBit(ccb, DOKAN_DIR_MATCH_ALL);
}
}
// if search pattern is provided, add the length of it to store pattern
if (ccb->SearchPattern) {
eventLength += ccb->SearchPatternLength;
}
eventContext = AllocateEventContext(vcb->Dcb, Irp, eventLength, ccb);
if (eventContext == NULL) {
DokanFCBUnlock(fcb);
return STATUS_INSUFFICIENT_RESOURCES;
}
eventContext->Context = ccb->UserContext;
// DDbgPrint(" get Context %X\n", (ULONG)ccb->UserContext);
// index which specified index-1 th directory entry has been returned
// this time, 'index'th entry should be returned
index = 0;
if (irpSp->Flags & SL_INDEX_SPECIFIED) {
index = irpSp->Parameters.QueryDirectory.FileIndex;
DDbgPrint(" using FileIndex %d\n", index);
} else if (FlagOn(irpSp->Flags, SL_RESTART_SCAN)) {
DDbgPrint(" SL_RESTART_SCAN\n");
index = 0;
} else {
index = (ULONG)ccb->Context;
DDbgPrint(" ccb->Context %d\n", index);
}
eventContext->Operation.Directory.FileInformationClass =
irpSp->Parameters.QueryDirectory.FileInformationClass;
eventContext->Operation.Directory.BufferLength =
irpSp->Parameters.QueryDirectory.Length; // length of buffer
eventContext->Operation.Directory.FileIndex =
index; // directory index which should be returned this time
// copying file name(directory name)
eventContext->Operation.Directory.DirectoryNameLength = fcb->FileName.Length;
RtlCopyMemory(eventContext->Operation.Directory.DirectoryName,
fcb->FileName.Buffer, fcb->FileName.Length);
DokanFCBUnlock(fcb);
// if search pattern is specified, copy it to EventContext
if (ccb->SearchPatternLength && ccb->SearchPattern) {
PVOID searchBuffer;
eventContext->Operation.Directory.SearchPatternLength =
ccb->SearchPatternLength;
eventContext->Operation.Directory.SearchPatternOffset =
eventContext->Operation.Directory.DirectoryNameLength;
searchBuffer = (PVOID)(
(SIZE_T)&eventContext->Operation.Directory.SearchPatternBase[0] +
(SIZE_T)eventContext->Operation.Directory.SearchPatternOffset);
RtlCopyMemory(searchBuffer, ccb->SearchPattern, ccb->SearchPatternLength);
DDbgPrint(" ccb->SearchPattern %ws\n", ccb->SearchPattern);
}
status = DokanRegisterPendingIrp(DeviceObject, Irp, eventContext, flags);
return status;
}