mirror of
https://github.com/winfsp/winfsp.git
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sys: create: move some code around
This commit is contained in:
Bill Zissimopoulos
428
src/sys/create.c
428
src/sys/create.c
@@ -28,6 +28,13 @@ static NTSTATUS FspFsvolCreateNoLock(
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BOOLEAN MainFileOpen);
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FSP_IOPREP_DISPATCH FspFsvolCreatePrepare;
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FSP_IOCMPL_DISPATCH FspFsvolCreateComplete;
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static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response,
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FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject,
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BOOLEAN FlushImage);
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static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc);
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static FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini;
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static FSP_IOP_REQUEST_FINI FspFsvolCreateTryOpenRequestFini;
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static FSP_IOP_REQUEST_FINI FspFsvolCreateOverwriteRequestFini;
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static NTSTATUS FspFsvolCreateSharingViolation(
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PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response, FSP_FILE_NODE *FileNode);
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static NTSTATUS FspFsvolCreateSharingViolationWork(
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@@ -41,13 +48,6 @@ static VOID FspFsvolCreateCheckOplockPrepare(
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PVOID Context, PIRP Irp);
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static VOID FspFsvolCreateCheckOplockComplete(
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PVOID Context, PIRP Irp);
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static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response,
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FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject,
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BOOLEAN FlushImage);
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static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc);
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static FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini;
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static FSP_IOP_REQUEST_FINI FspFsvolCreateTryOpenRequestFini;
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static FSP_IOP_REQUEST_FINI FspFsvolCreateOverwriteRequestFini;
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FSP_DRIVER_DISPATCH FspCreate;
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#ifdef ALLOC_PRAGMA
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@@ -57,17 +57,17 @@ FSP_DRIVER_DISPATCH FspCreate;
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#pragma alloc_text(PAGE, FspFsvolCreateNoLock)
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#pragma alloc_text(PAGE, FspFsvolCreatePrepare)
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#pragma alloc_text(PAGE, FspFsvolCreateComplete)
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#pragma alloc_text(PAGE, FspFsvolCreateTryOpen)
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#pragma alloc_text(PAGE, FspFsvolCreatePostClose)
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#pragma alloc_text(PAGE, FspFsvolCreateRequestFini)
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#pragma alloc_text(PAGE, FspFsvolCreateTryOpenRequestFini)
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#pragma alloc_text(PAGE, FspFsvolCreateOverwriteRequestFini)
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#pragma alloc_text(PAGE, FspFsvolCreateSharingViolation)
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#pragma alloc_text(PAGE, FspFsvolCreateSharingViolationWork)
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#pragma alloc_text(PAGE, FspFsvolCreateSharingViolationOplockComplete)
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#pragma alloc_text(PAGE, FspFsvolCreateCheckOplock)
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#pragma alloc_text(PAGE, FspFsvolCreateCheckOplockPrepare)
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#pragma alloc_text(PAGE, FspFsvolCreateCheckOplockComplete)
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#pragma alloc_text(PAGE, FspFsvolCreateTryOpen)
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#pragma alloc_text(PAGE, FspFsvolCreatePostClose)
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#pragma alloc_text(PAGE, FspFsvolCreateRequestFini)
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#pragma alloc_text(PAGE, FspFsvolCreateTryOpenRequestFini)
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#pragma alloc_text(PAGE, FspFsvolCreateOverwriteRequestFini)
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#pragma alloc_text(PAGE, FspCreate)
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#endif
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@@ -997,6 +997,208 @@ NTSTATUS FspFsvolCreateComplete(
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IrpSp->FileObject, IrpSp->FileObject->RelatedFileObject, IrpSp->FileObject->FileName);
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}
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static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response,
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FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject,
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BOOLEAN FlushImage)
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{
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PAGED_CODE();
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FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
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NTSTATUS Result;
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BOOLEAN Success;
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if (FspFsctlTransactCreateKind == Request->Kind)
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{
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PVOID RequestDeviceObjectValue = FspIopRequestContext(Request, RequestDeviceObject);
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/* disassociate the FileDesc momentarily from the Request */
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Request = FspIrpRequest(Irp);
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FspIopRequestContext(Request, RequestDeviceObject) = 0;
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FspIopRequestContext(Request, RequestFileDesc) = 0;
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/* reset the Request and reassociate the FileDesc and FileObject with it */
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Request->Kind = FspFsctlTransactReservedKind;
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FspIopResetRequest(Request, FspFsvolCreateTryOpenRequestFini);
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FspIopRequestContext(Request, RequestDeviceObject) = RequestDeviceObjectValue;
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FspIopRequestContext(Request, RequestFileDesc) = FileDesc;
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FspIopRequestContext(Request, RequestFileObject) = FileObject;
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FspIopRequestContext(Request, RequestState) = (PVOID)(UINT_PTR)FlushImage;
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}
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Result = STATUS_SUCCESS;
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Success = DEBUGTEST(90) &&
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FspFileNodeTryAcquireExclusive(FileNode, Main) &&
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FspFsvolCreateCheckOplock(Irp, Response, &Result);
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if (!Success)
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{
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if (!NT_SUCCESS(Result) || STATUS_PENDING == Result)
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{
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FspFileNodeRelease(FileNode, Main);
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return Result;
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}
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FspIopRetryCompleteIrp(Irp, Response, &Result);
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return Result;
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}
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FspFileNodeSetFileInfo(FileNode, FileObject, &Response->Rsp.Create.Opened.FileInfo);
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if (FlushImage)
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{
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Success = MmFlushImageSection(&FileNode->NonPaged->SectionObjectPointers,
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MmFlushForWrite);
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if (!Success)
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{
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FspFileNodeRelease(FileNode, Main);
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
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BOOLEAN DeleteOnClose = BooleanFlagOn(IrpSp->Parameters.Create.Options, FILE_DELETE_ON_CLOSE);
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if (0 == Request)
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{
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FspFsvolCreatePostClose(FileDesc);
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FspFileNodeClose(FileNode, FileObject, TRUE, TRUE);
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}
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return DeleteOnClose ? STATUS_CANNOT_DELETE : STATUS_SHARING_VIOLATION;
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}
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}
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if (FILE_CREATED == Response->IoStatus.Information)
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FspFileNodeNotifyChange(FileNode,
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FileNode->IsDirectory ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME,
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FILE_ACTION_ADDED);
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FspFileNodeRelease(FileNode, Main);
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/* SUCCESS! */
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FspIopRequestContext(Request, RequestFileDesc) = 0;
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Irp->IoStatus.Information = Response->IoStatus.Information;
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return STATUS_SUCCESS;
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}
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static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc)
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{
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PAGED_CODE();
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FSP_FILE_NODE *FileNode = FileDesc->FileNode;
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PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
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FSP_FSCTL_TRANSACT_REQ *Request;
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/* create the user-mode file system request; MustSucceed because we cannot fail */
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FspIopCreateRequestMustSucceed(0, 0, 0, &Request);
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/* populate the Close request */
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Request->Kind = FspFsctlTransactCloseKind;
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Request->Req.Close.UserContext = FileNode->UserContext;
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Request->Req.Close.UserContext2 = FileDesc->UserContext2;
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/*
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* Post as a BestEffort work request. This allows us to complete our own IRP
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* and return immediately.
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*/
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FspIopPostWorkRequestBestEffort(FsvolDeviceObject, Request);
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/*
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* Note that it is still possible for this request to not be delivered,
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* if the volume device Ioq is stopped. But such failures are benign
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* from our perspective, because they mean that the file system is going
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* away and should correctly tear things down.
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*/
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}
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static VOID FspFsvolCreateRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
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{
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PAGED_CODE();
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PDEVICE_OBJECT FsvolDeviceObject = Context[RequestDeviceObject];
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FSP_FILE_DESC *FileDesc = Context[RequestFileDesc];
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HANDLE AccessToken = Context[RequestAccessToken];
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PEPROCESS Process = Context[RequestProcess];
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if (0 != FileDesc)
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{
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FspFileNodeDereference(FileDesc->FileNode);
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FspFileDescDelete(FileDesc);
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}
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if (0 != AccessToken)
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{
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KAPC_STATE ApcState;
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BOOLEAN Attach;
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ASSERT(0 != Process);
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Attach = Process != PsGetCurrentProcess();
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if (Attach)
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KeStackAttachProcess(Process, &ApcState);
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#if DBG
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NTSTATUS Result0;
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Result0 = ObCloseHandle(AccessToken, UserMode);
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if (!NT_SUCCESS(Result0))
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DEBUGLOG("ObCloseHandle() = %s", NtStatusSym(Result0));
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#else
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ObCloseHandle(AccessToken, UserMode);
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#endif
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if (Attach)
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KeUnstackDetachProcess(&ApcState);
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ObDereferenceObject(Process);
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}
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if (0 != FsvolDeviceObject)
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FspFsvolDeviceFileRenameReleaseOwner(FsvolDeviceObject, Request);
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}
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static VOID FspFsvolCreateTryOpenRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
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{
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PAGED_CODE();
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PDEVICE_OBJECT FsvolDeviceObject = Context[RequestDeviceObject];
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FSP_FILE_DESC *FileDesc = Context[RequestFileDesc];
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PFILE_OBJECT FileObject = Context[RequestFileObject];
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if (0 != FileDesc)
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{
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ASSERT(0 != FileObject);
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FspFsvolCreatePostClose(FileDesc);
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FspFileNodeClose(FileDesc->FileNode, FileObject, TRUE, TRUE);
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FspFileNodeDereference(FileDesc->FileNode);
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FspFileDescDelete(FileDesc);
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}
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if (0 != FsvolDeviceObject)
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FspFsvolDeviceFileRenameReleaseOwner(FsvolDeviceObject, Request);
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}
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static VOID FspFsvolCreateOverwriteRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
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{
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PAGED_CODE();
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PDEVICE_OBJECT FsvolDeviceObject = Context[RequestDeviceObject];
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FSP_FILE_DESC *FileDesc = Context[RequestFileDesc];
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PFILE_OBJECT FileObject = Context[RequestFileObject];
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ULONG State = (ULONG)(UINT_PTR)Context[RequestState];
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if (0 != FileDesc)
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{
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ASSERT(0 != FileObject);
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if (RequestPending == State)
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FspFsvolCreatePostClose(FileDesc);
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else if (RequestProcessing == State)
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FspFileNodeReleaseOwner(FileDesc->FileNode, Full, Request);
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FspFileNodeClose(FileDesc->FileNode, FileObject, TRUE, TRUE);
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FspFileNodeDereference(FileDesc->FileNode);
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FspFileDescDelete(FileDesc);
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}
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if (0 != FsvolDeviceObject)
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FspFsvolDeviceFileRenameReleaseOwner(FsvolDeviceObject, Request);
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}
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static NTSTATUS FspFsvolCreateSharingViolation(
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PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response, FSP_FILE_NODE *FileNode)
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{
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@@ -1200,208 +1402,6 @@ static VOID FspFsvolCreateCheckOplockComplete(
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FspIopRetryCompleteIrp(Irp, Context, &Result);
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}
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static NTSTATUS FspFsvolCreateTryOpen(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response,
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FSP_FILE_NODE *FileNode, FSP_FILE_DESC *FileDesc, PFILE_OBJECT FileObject,
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BOOLEAN FlushImage)
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{
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PAGED_CODE();
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FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
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NTSTATUS Result;
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BOOLEAN Success;
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if (FspFsctlTransactCreateKind == Request->Kind)
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{
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PVOID RequestDeviceObjectValue = FspIopRequestContext(Request, RequestDeviceObject);
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/* disassociate the FileDesc momentarily from the Request */
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Request = FspIrpRequest(Irp);
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FspIopRequestContext(Request, RequestDeviceObject) = 0;
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FspIopRequestContext(Request, RequestFileDesc) = 0;
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/* reset the Request and reassociate the FileDesc and FileObject with it */
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Request->Kind = FspFsctlTransactReservedKind;
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FspIopResetRequest(Request, FspFsvolCreateTryOpenRequestFini);
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FspIopRequestContext(Request, RequestDeviceObject) = RequestDeviceObjectValue;
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FspIopRequestContext(Request, RequestFileDesc) = FileDesc;
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FspIopRequestContext(Request, RequestFileObject) = FileObject;
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FspIopRequestContext(Request, RequestState) = (PVOID)(UINT_PTR)FlushImage;
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}
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Result = STATUS_SUCCESS;
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Success = DEBUGTEST(90) &&
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FspFileNodeTryAcquireExclusive(FileNode, Main) &&
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FspFsvolCreateCheckOplock(Irp, Response, &Result);
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if (!Success)
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{
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if (!NT_SUCCESS(Result) || STATUS_PENDING == Result)
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{
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FspFileNodeRelease(FileNode, Main);
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return Result;
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}
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FspIopRetryCompleteIrp(Irp, Response, &Result);
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return Result;
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}
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FspFileNodeSetFileInfo(FileNode, FileObject, &Response->Rsp.Create.Opened.FileInfo);
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if (FlushImage)
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{
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Success = MmFlushImageSection(&FileNode->NonPaged->SectionObjectPointers,
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MmFlushForWrite);
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if (!Success)
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{
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FspFileNodeRelease(FileNode, Main);
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
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BOOLEAN DeleteOnClose = BooleanFlagOn(IrpSp->Parameters.Create.Options, FILE_DELETE_ON_CLOSE);
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if (0 == Request)
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{
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FspFsvolCreatePostClose(FileDesc);
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FspFileNodeClose(FileNode, FileObject, TRUE, TRUE);
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}
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return DeleteOnClose ? STATUS_CANNOT_DELETE : STATUS_SHARING_VIOLATION;
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}
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}
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if (FILE_CREATED == Response->IoStatus.Information)
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FspFileNodeNotifyChange(FileNode,
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FileNode->IsDirectory ? FILE_NOTIFY_CHANGE_DIR_NAME : FILE_NOTIFY_CHANGE_FILE_NAME,
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FILE_ACTION_ADDED);
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FspFileNodeRelease(FileNode, Main);
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/* SUCCESS! */
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FspIopRequestContext(Request, RequestFileDesc) = 0;
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Irp->IoStatus.Information = Response->IoStatus.Information;
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return STATUS_SUCCESS;
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}
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static VOID FspFsvolCreatePostClose(FSP_FILE_DESC *FileDesc)
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{
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PAGED_CODE();
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FSP_FILE_NODE *FileNode = FileDesc->FileNode;
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PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
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FSP_FSCTL_TRANSACT_REQ *Request;
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/* create the user-mode file system request; MustSucceed because we cannot fail */
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FspIopCreateRequestMustSucceed(0, 0, 0, &Request);
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/* populate the Close request */
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Request->Kind = FspFsctlTransactCloseKind;
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Request->Req.Close.UserContext = FileNode->UserContext;
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Request->Req.Close.UserContext2 = FileDesc->UserContext2;
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/*
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* Post as a BestEffort work request. This allows us to complete our own IRP
|
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* and return immediately.
|
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*/
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FspIopPostWorkRequestBestEffort(FsvolDeviceObject, Request);
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/*
|
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* Note that it is still possible for this request to not be delivered,
|
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* if the volume device Ioq is stopped. But such failures are benign
|
||||
* from our perspective, because they mean that the file system is going
|
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* away and should correctly tear things down.
|
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*/
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}
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static VOID FspFsvolCreateRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
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{
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PAGED_CODE();
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PDEVICE_OBJECT FsvolDeviceObject = Context[RequestDeviceObject];
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FSP_FILE_DESC *FileDesc = Context[RequestFileDesc];
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HANDLE AccessToken = Context[RequestAccessToken];
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PEPROCESS Process = Context[RequestProcess];
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if (0 != FileDesc)
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{
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FspFileNodeDereference(FileDesc->FileNode);
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FspFileDescDelete(FileDesc);
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}
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if (0 != AccessToken)
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{
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KAPC_STATE ApcState;
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BOOLEAN Attach;
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ASSERT(0 != Process);
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Attach = Process != PsGetCurrentProcess();
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if (Attach)
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KeStackAttachProcess(Process, &ApcState);
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#if DBG
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NTSTATUS Result0;
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Result0 = ObCloseHandle(AccessToken, UserMode);
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if (!NT_SUCCESS(Result0))
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DEBUGLOG("ObCloseHandle() = %s", NtStatusSym(Result0));
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#else
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ObCloseHandle(AccessToken, UserMode);
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#endif
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if (Attach)
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KeUnstackDetachProcess(&ApcState);
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ObDereferenceObject(Process);
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}
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if (0 != FsvolDeviceObject)
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FspFsvolDeviceFileRenameReleaseOwner(FsvolDeviceObject, Request);
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}
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static VOID FspFsvolCreateTryOpenRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
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{
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PAGED_CODE();
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PDEVICE_OBJECT FsvolDeviceObject = Context[RequestDeviceObject];
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FSP_FILE_DESC *FileDesc = Context[RequestFileDesc];
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PFILE_OBJECT FileObject = Context[RequestFileObject];
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||||
if (0 != FileDesc)
|
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{
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ASSERT(0 != FileObject);
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FspFsvolCreatePostClose(FileDesc);
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FspFileNodeClose(FileDesc->FileNode, FileObject, TRUE, TRUE);
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FspFileNodeDereference(FileDesc->FileNode);
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||||
FspFileDescDelete(FileDesc);
|
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}
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if (0 != FsvolDeviceObject)
|
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FspFsvolDeviceFileRenameReleaseOwner(FsvolDeviceObject, Request);
|
||||
}
|
||||
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static VOID FspFsvolCreateOverwriteRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
|
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{
|
||||
PAGED_CODE();
|
||||
|
||||
PDEVICE_OBJECT FsvolDeviceObject = Context[RequestDeviceObject];
|
||||
FSP_FILE_DESC *FileDesc = Context[RequestFileDesc];
|
||||
PFILE_OBJECT FileObject = Context[RequestFileObject];
|
||||
ULONG State = (ULONG)(UINT_PTR)Context[RequestState];
|
||||
|
||||
if (0 != FileDesc)
|
||||
{
|
||||
ASSERT(0 != FileObject);
|
||||
|
||||
if (RequestPending == State)
|
||||
FspFsvolCreatePostClose(FileDesc);
|
||||
else if (RequestProcessing == State)
|
||||
FspFileNodeReleaseOwner(FileDesc->FileNode, Full, Request);
|
||||
|
||||
FspFileNodeClose(FileDesc->FileNode, FileObject, TRUE, TRUE);
|
||||
FspFileNodeDereference(FileDesc->FileNode);
|
||||
FspFileDescDelete(FileDesc);
|
||||
}
|
||||
|
||||
if (0 != FsvolDeviceObject)
|
||||
FspFsvolDeviceFileRenameReleaseOwner(FsvolDeviceObject, Request);
|
||||
}
|
||||
|
||||
NTSTATUS FspCreate(
|
||||
PDEVICE_OBJECT DeviceObject, PIRP Irp)
|
||||
{
|
||||
|
||||
Reference in New Issue
Block a user