sys: IRP_MJ_SET_INFORMATION: FileRenameInformation

2025-10-30 19:48:38 -05:00 · 2016-02-09 11:26:03 -08:00
parent 38839ddd82
commit 6c94eb3398
6 changed files with 323 additions and 64 deletions
--- a/src/sys/create.c
+++ b/src/sys/create.c
@@ -550,11 +550,21 @@ NTSTATUS FspFsvolCreateComplete(
            FSP_RETURN();
        }

+        /* fix FileNode->FileName if we were doing SL_OPEN_TARGET_DIRECTORY */
+        if (Request->Req.Create.OpenTargetDirectory)
+        {
+            UNICODE_STRING Suffix;
+
+            FspUnicodePathSuffix(&FileNode->FileName, &FileNode->FileName, &Suffix);
+        }
+
        /* populate the FileNode/FileDesc fields from the Response */
        FileNode->UserContext = Response->Rsp.Create.Opened.UserContext;
        FileNode->IndexNumber = Response->Rsp.Create.Opened.FileInfo.IndexNumber;
        FileNode->IsDirectory = BooleanFlagOn(Response->Rsp.Create.Opened.FileInfo.FileAttributes,
            FILE_ATTRIBUTE_DIRECTORY);
+        FileNode->IsRootDirectory = FileNode->IsDirectory &&
+            sizeof(WCHAR) == FileNode->FileName.Length && L'\\' == FileNode->FileName.Buffer[0];
        FileDesc->UserContext2 = Response->Rsp.Create.Opened.UserContext2;
        FileDesc->DeleteOnClose = BooleanFlagOn(IrpSp->Parameters.Create.Options, FILE_DELETE_ON_CLOSE);

--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -336,6 +336,9 @@ ULONG FspHashMixPointer(PVOID Pointer)
 }

 /* utility */
+PVOID FspAllocMustSucceed(SIZE_T Size);
+PVOID FspAllocateIrpMustSucceed(CCHAR StackSize);
+VOID FspUnicodePathSuffix(PUNICODE_STRING Path, PUNICODE_STRING Remain, PUNICODE_STRING Suffix);
 NTSTATUS FspCreateGuid(GUID *Guid);
 NTSTATUS FspCcSetFileSizes(PFILE_OBJECT FileObject, PCC_FILE_SIZES FileSizes);

@@ -601,6 +604,7 @@ typedef struct
    FSP_DEVICE_CONTEXT_BY_NAME_TABLE_ELEMENT ContextByNameElementStorage;
    /* locked under FSP_FSVOL_DEVICE_EXTENSION::FileRenameResource */
    UNICODE_STRING FileName;
+    PWSTR ExternalFileName;
    /* locked under Header.Resource */
    UINT64 InfoExpirationTime;
    UINT32 FileAttributes;
@@ -616,6 +620,7 @@ typedef struct
    UINT64 UserContext;
    UINT64 IndexNumber;
    BOOLEAN IsDirectory;
+    BOOLEAN IsRootDirectory;
    WCHAR FileNameBuf[];
 } FSP_FILE_NODE;
 typedef struct
@@ -639,6 +644,7 @@ VOID FspFileNodeDereference(FSP_FILE_NODE *FileNode)
    if (0 == RefCount)
        FspFileNodeDelete(FileNode);
 }
+VOID FspFileNodeSetExternalFileName(FSP_FILE_NODE *FileNode, PUNICODE_STRING NewFileName);
 VOID FspFileNodeAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags);
 BOOLEAN FspFileNodeTryAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags);
 VOID FspFileNodeAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags);
--- a/src/sys/file.c
+++ b/src/sys/file.c
@@ -9,6 +9,7 @@
 NTSTATUS FspFileNodeCreate(PDEVICE_OBJECT DeviceObject,
    ULONG ExtraSize, FSP_FILE_NODE **PFileNode);
 VOID FspFileNodeDelete(FSP_FILE_NODE *FileNode);
+VOID FspFileNodeSetExternalFileName(FSP_FILE_NODE *FileNode, PUNICODE_STRING NewFileName);
 VOID FspFileNodeAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags);
 BOOLEAN FspFileNodeTryAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags);
 VOID FspFileNodeAcquireExclusiveF(FSP_FILE_NODE *FileNode, ULONG Flags);
@@ -32,6 +33,7 @@ VOID FspFileDescDelete(FSP_FILE_DESC *FileDesc);
 #ifdef ALLOC_PRAGMA
 #pragma alloc_text(PAGE, FspFileNodeCreate)
 #pragma alloc_text(PAGE, FspFileNodeDelete)
+#pragma alloc_text(PAGE, FspFileNodeSetExternalFileName)
 #pragma alloc_text(PAGE, FspFileNodeAcquireSharedF)
 #pragma alloc_text(PAGE, FspFileNodeTryAcquireSharedF)
 #pragma alloc_text(PAGE, FspFileNodeAcquireExclusiveF)
@@ -100,6 +102,9 @@ VOID FspFileNodeDelete(FSP_FILE_NODE *FileNode)

    FspDeviceDereference(FileNode->FsvolDeviceObject);

+    if (0 != FileNode->ExternalFileName)
+        FspFree(FileNode->ExternalFileName);
+
    ExDeleteResourceLite(&FileNode->NonPaged->PagingIoResource);
    ExDeleteResourceLite(&FileNode->NonPaged->Resource);
    FspFree(FileNode->NonPaged);
@@ -107,6 +112,17 @@ VOID FspFileNodeDelete(FSP_FILE_NODE *FileNode)
    FspFree(FileNode);
 }

+VOID FspFileNodeSetExternalFileName(FSP_FILE_NODE *FileNode, PUNICODE_STRING NewFileName)
+{
+    PAGED_CODE();
+
+    if (0 != FileNode->ExternalFileName)
+        FspFree(FileNode->ExternalFileName);
+
+    FileNode->FileName = *NewFileName;
+    FileNode->ExternalFileName = NewFileName->Buffer;
+}
+
 VOID FspFileNodeAcquireSharedF(FSP_FILE_NODE *FileNode, ULONG Flags)
 {
    PAGED_CODE();
--- a/src/sys/fileinfo.c
+++ b/src/sys/fileinfo.c
@@ -30,6 +30,7 @@ static NTSTATUS FspFsvolQueryStandardInformation(PFILE_OBJECT FileObject,
 static NTSTATUS FspFsvolQueryInformation(
    PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 FSP_IOCMPL_DISPATCH FspFsvolQueryInformationComplete;
+static FSP_IOP_REQUEST_FINI FspFsvolQueryInformationRequestFini;
 static NTSTATUS FspFsvolSetAllocationInformation(PFILE_OBJECT FileObject,
    PVOID Buffer, ULONG Length,
    FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response);
@@ -44,13 +45,14 @@ static NTSTATUS FspFsvolSetEndOfFileInformation(PFILE_OBJECT FileObject,
    FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response);
 static NTSTATUS FspFsvolSetPositionInformation(PFILE_OBJECT FileObject,
    PVOID Buffer, ULONG Length);
-static NTSTATUS FspFsvolSetRenameInformation(PFILE_OBJECT FileObject,
-    PVOID Buffer, ULONG Length,
-    FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response);
+static NTSTATUS FspFsvolSetRenameInformation(
+    PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
+NTSTATUS FspFsvolSetRenameInformationSuccess(
+    PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
 static NTSTATUS FspFsvolSetInformation(
    PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
 FSP_IOCMPL_DISPATCH FspFsvolSetInformationComplete;
-static FSP_IOP_REQUEST_FINI FspFsvolInformationRequestFini;
+static FSP_IOP_REQUEST_FINI FspFsvolSetInformationRequestFini;
 FSP_DRIVER_DISPATCH FspQueryInformation;
 FSP_DRIVER_DISPATCH FspSetInformation;

@@ -65,25 +67,32 @@ FSP_DRIVER_DISPATCH FspSetInformation;
 #pragma alloc_text(PAGE, FspFsvolQueryStandardInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryInformation)
 #pragma alloc_text(PAGE, FspFsvolQueryInformationComplete)
+#pragma alloc_text(PAGE, FspFsvolQueryInformationRequestFini)
 #pragma alloc_text(PAGE, FspFsvolSetAllocationInformation)
 #pragma alloc_text(PAGE, FspFsvolSetBasicInformation)
 #pragma alloc_text(PAGE, FspFsvolSetDispositionInformation)
 #pragma alloc_text(PAGE, FspFsvolSetEndOfFileInformation)
 #pragma alloc_text(PAGE, FspFsvolSetPositionInformation)
 #pragma alloc_text(PAGE, FspFsvolSetRenameInformation)
+#pragma alloc_text(PAGE, FspFsvolSetRenameInformationSuccess)
 #pragma alloc_text(PAGE, FspFsvolSetInformation)
 #pragma alloc_text(PAGE, FspFsvolSetInformationComplete)
-#pragma alloc_text(PAGE, FspFsvolInformationRequestFini)
+#pragma alloc_text(PAGE, FspFsvolSetInformationRequestFini)
 #pragma alloc_text(PAGE, FspQueryInformation)
 #pragma alloc_text(PAGE, FspSetInformation)
 #endif

 enum
 {
+    /* QueryInformation */
    RequestFileNode                     = 0,
    RequestInfoChangeNumber             = 1,
    RequestAllInformationResult         = 2,
    RequestAllInformationBuffer         = 3,
+
+    /* SetInformation */
+    //RequestFileNode                   = 0,
+    RequestDeviceObject                 = 1,
 };

 static NTSTATUS FspFsvolQueryAllInformation(PFILE_OBJECT FileObject,
@@ -439,7 +448,7 @@ static NTSTATUS FspFsvolQueryInformation(
    FSP_FSCTL_TRANSACT_REQ *Request;

    Result = FspIopCreateRequestEx(Irp, FileNameRequired ? &FileNode->FileName : 0, 0,
-        FspFsvolInformationRequestFini, &Request);
+        FspFsvolQueryInformationRequestFini, &Request);
    if (!NT_SUCCESS(Result))
    {
        FspFileNodeRelease(FileNode, Full);
@@ -540,6 +549,16 @@ NTSTATUS FspFsvolQueryInformationComplete(
        IrpSp->FileObject);
 }

+static VOID FspFsvolQueryInformationRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
+{
+    PAGED_CODE();
+
+    FSP_FILE_NODE *FileNode = Context[RequestFileNode];
+
+    if (0 != FileNode)
+        FspFileNodeReleaseOwner(FileNode, Full, Request);
+}
+
 static NTSTATUS FspFsvolSetAllocationInformation(PFILE_OBJECT FileObject,
    PVOID Buffer, ULONG Length,
    FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response)
@@ -631,6 +650,12 @@ static NTSTATUS FspFsvolSetDispositionInformation(PFILE_OBJECT FileObject,
    {
        if (sizeof(FILE_DISPOSITION_INFORMATION) > Length)
            return STATUS_INVALID_PARAMETER;
+
+        FSP_FILE_NODE *FileNode = FileObject->FsContext;
+
+        if (FileNode->IsRootDirectory)
+            /* cannot delete root directory */
+            return STATUS_CANNOT_DELETE;
    }
    else if (0 == Response)
    {
@@ -714,13 +739,175 @@ static NTSTATUS FspFsvolSetPositionInformation(PFILE_OBJECT FileObject,
    return STATUS_SUCCESS;
 }

-static NTSTATUS FspFsvolSetRenameInformation(PFILE_OBJECT FileObject,
-    PVOID Buffer, ULONG Length,
-    FSP_FSCTL_TRANSACT_REQ *Request, const FSP_FSCTL_TRANSACT_RSP *Response)
+static NTSTATUS FspFsvolSetRenameInformation(
+    PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
 {
    PAGED_CODE();

-    return STATUS_INVALID_DEVICE_REQUEST;
+    NTSTATUS Result;
+    PFILE_OBJECT FileObject = IrpSp->FileObject;
+    PFILE_OBJECT TargetFileObject = IrpSp->Parameters.SetFile.FileObject;
+    PFILE_RENAME_INFORMATION Info = (PFILE_RENAME_INFORMATION)Irp->AssociatedIrp.SystemBuffer;
+    ULONG Length = IrpSp->Parameters.SetFile.Length;
+    BOOLEAN ReplaceIfExists = IrpSp->Parameters.SetFile.ReplaceIfExists;
+    FSP_FILE_NODE *FileNode = FileObject->FsContext;
+    FSP_FILE_DESC *FileDesc = FileObject->FsContext2;
+    FSP_FILE_NODE *TargetFileNode = 0 != TargetFileObject ?
+        TargetFileObject->FsContext : 0;
+    FSP_FSCTL_TRANSACT_REQ *Request;
+    UNICODE_STRING NewFileName;
+
+    ASSERT(FileNode == FileDesc->FileNode);
+
+    if (sizeof(FILE_RENAME_INFORMATION) > Length)
+        return STATUS_INVALID_PARAMETER;
+    if (sizeof(WCHAR) > Info->FileNameLength)
+        return STATUS_INVALID_PARAMETER;
+    if (FileNode->IsRootDirectory)
+        /* cannot rename root directory */
+        return STATUS_INVALID_PARAMETER;
+
+    if (0 != TargetFileNode)
+    {
+        if (!FspFileNodeIsValid(TargetFileNode))
+            return STATUS_INVALID_PARAMETER;
+
+        ASSERT(TargetFileNode->IsDirectory);
+    }
+
+    FspFsvolDeviceFileRenameAcquireExclusive(FsvolDeviceObject);
+    FspFileNodeAcquireExclusive(FileNode, Full);
+
+    if (L'\\' == Info->FileName[0])
+    {
+        Result = FspIopCreateRequestEx(Irp, &FileNode->FileName,
+            Info->FileNameLength + sizeof(WCHAR),
+            FspFsvolSetInformationRequestFini, &Request);
+        if (!NT_SUCCESS(Result))
+            goto unlock_exit;
+
+        Request->Req.SetInformation.Info.Rename.NewFileName.Size =
+            (UINT16)(Info->FileNameLength + sizeof(WCHAR));
+
+        RtlCopyMemory(Request->Buffer + Request->FileName.Size,
+            Info->FileName, Info->FileNameLength);
+    }
+    else
+    {
+        UNICODE_STRING Remain, Suffix;
+
+        FspUnicodePathSuffix(&FileNode->FileName, &Remain, &Suffix);
+
+        Result = FspIopCreateRequestEx(Irp, &FileNode->FileName,
+            Remain.Length + sizeof(WCHAR) + Info->FileNameLength + sizeof(WCHAR),
+            FspFsvolSetInformationRequestFini, &Request);
+        if (!NT_SUCCESS(Result))
+            goto unlock_exit;
+
+        Request->Req.SetInformation.Info.Rename.NewFileName.Size =
+            (UINT16)(Remain.Length + sizeof(WCHAR) + Info->FileNameLength + sizeof(WCHAR));
+
+        RtlCopyMemory(Request->Buffer + Request->FileName.Size,
+            Remain.Buffer, Remain.Length);
+        *(PWSTR)(Request->Buffer + Request->FileName.Size + Remain.Length) = L'\\';
+        RtlCopyMemory(Request->Buffer + Request->FileName.Size + Remain.Length + sizeof(WCHAR),
+            Info->FileName, Info->FileNameLength);
+    }
+
+    *(PWSTR)(Request->Buffer + Request->Req.SetInformation.Info.Rename.NewFileName.Size) = L'\0';
+
+    Request->Kind = FspFsctlTransactSetInformationKind;
+    Request->Req.SetInformation.UserContext = FileNode->UserContext;
+    Request->Req.SetInformation.UserContext2 = FileDesc->UserContext2;
+    Request->Req.SetInformation.FileInformationClass = FileRenameInformation;
+    Request->Req.SetInformation.Info.Rename.NewFileName.Offset = Request->FileName.Size;
+    Request->Req.SetInformation.Info.Rename.ReplaceIfExists = ReplaceIfExists;
+
+    FspFsvolDeviceFileRenameSetOwner(FsvolDeviceObject, Request);
+    FspFileNodeSetOwner(FileNode, Full, Request);
+    FspIopRequestContext(Request, RequestFileNode) = FileNode;
+    FspIopRequestContext(Request, RequestDeviceObject) = FsvolDeviceObject;
+
+    /*
+     * Special rules for renaming open files:
+     * -   A file cannot be renamed if it has any open handles,
+     *     unless it is only open because of a batch opportunistic lock (oplock)
+     *     and the batch oplock can be broken immediately.
+     * -   A file cannot be renamed if a file with the same name exists
+     *     and has open handles (except in the batch-oplock case described earlier).
+     * -   A directory cannot be renamed if it or any of its subdirectories contains a file
+     *     that has open handles (except in the batch-oplock case described earlier).
+     */
+
+    NewFileName.Length = NewFileName.MaximumLength =
+        Request->Req.SetInformation.Info.Rename.NewFileName.Size - sizeof(WCHAR);
+    NewFileName.Buffer = (PVOID)(Request->Buffer + Request->FileName.Size);
+
+    Result = STATUS_SUCCESS;
+    FspFsvolDeviceLockContextTable(FsvolDeviceObject);
+    if (FileNode->IsDirectory)
+    {
+        if (1 < FileNode->OpenCount ||
+            0 != FspFsvolDeviceLookupChildContextByName(FsvolDeviceObject, &FileNode->FileName) ||
+            0 != FspFsvolDeviceLookupContextByName(FsvolDeviceObject, &NewFileName) ||
+            0 != FspFsvolDeviceLookupChildContextByName(FsvolDeviceObject, &NewFileName))
+            Result = STATUS_ACCESS_DENIED;
+    }
+    else
+    {
+        if (1 < FileNode->OpenCount ||
+            0 != FspFsvolDeviceLookupContextByName(FsvolDeviceObject, &NewFileName) ||
+            0 != FspFsvolDeviceLookupChildContextByName(FsvolDeviceObject, &NewFileName))
+            Result = STATUS_ACCESS_DENIED;
+    }
+    FspFsvolDeviceUnlockContextTable(FsvolDeviceObject);
+    if (!NT_SUCCESS(Result))
+        return Result;
+
+    return FSP_STATUS_IOQ_POST;
+
+unlock_exit:
+    FspFileNodeRelease(FileNode, Full);
+    FspFsvolDeviceFileRenameRelease(FsvolDeviceObject);
+
+    return Result;
+}
+
+NTSTATUS FspFsvolSetRenameInformationSuccess(
+    PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response)
+{
+    PAGED_CODE();
+
+    PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
+    PDEVICE_OBJECT FsvolDeviceObject = IrpSp->DeviceObject;
+    PFILE_OBJECT FileObject = IrpSp->FileObject;
+    FSP_FILE_NODE *FileNode = FileObject->FsContext;
+    FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
+    UNICODE_STRING NewFileName;
+    BOOLEAN Deleted, Inserted;
+
+    NewFileName.Length = NewFileName.MaximumLength =
+        Request->Req.SetInformation.Info.Rename.NewFileName.Size - sizeof(WCHAR);
+    NewFileName.Buffer = FspAllocMustSucceed(NewFileName.Length);
+    RtlCopyMemory(NewFileName.Buffer, Request->Buffer + Request->FileName.Size, NewFileName.Length);
+
+    FspFsvolDeviceLockContextTable(FsvolDeviceObject);
+    FspFsvolDeviceDeleteContextByName(FsvolDeviceObject, &FileNode->FileName, &Deleted);
+    ASSERT(Deleted);
+    FspFileNodeSetExternalFileName(FileNode, &NewFileName);
+    FspFsvolDeviceInsertContextByName(FsvolDeviceObject, &FileNode->FileName, FileNode,
+        &FileNode->ContextByNameElementStorage, &Inserted);
+    ASSERT(Inserted);
+    FspFsvolDeviceUnlockContextTable(FsvolDeviceObject);
+
+    FspIopRequestContext(Request, RequestFileNode) = 0;
+    FspIopRequestContext(Request, RequestDeviceObject) = 0;
+    FspFileNodeReleaseOwner(FileNode, Full, Request);
+    FspFsvolDeviceFileRenameRelease(FsvolDeviceObject);
+
+    Irp->IoStatus.Information = 0;
+
+    return STATUS_SUCCESS;
 }

 static NTSTATUS FspFsvolSetInformation(
@@ -732,8 +919,13 @@ static NTSTATUS FspFsvolSetInformation(
    if (!FspFileNodeIsValid(IrpSp->FileObject->FsContext))
        return STATUS_INVALID_DEVICE_REQUEST;

-    NTSTATUS Result;
    FILE_INFORMATION_CLASS FileInformationClass = IrpSp->Parameters.SetFile.FileInformationClass;
+
+    /* special case FileRenameInformation */
+    if (FileRenameInformation == FileInformationClass)
+        return FspFsvolSetRenameInformation(FsvolDeviceObject, Irp, IrpSp);
+
+    NTSTATUS Result;
    PFILE_OBJECT FileObject = IrpSp->FileObject;
    PVOID Buffer = Irp->AssociatedIrp.SystemBuffer;
    ULONG Length = IrpSp->Parameters.SetFile.Length;
@@ -759,9 +951,6 @@ static NTSTATUS FspFsvolSetInformation(
    case FilePositionInformation:
        Result = FspFsvolSetPositionInformation(FileObject, Buffer, Length);
        return Result;
-    case FileRenameInformation:
-        Result = FspFsvolSetRenameInformation(FileObject, Buffer, Length, 0, 0);
-        break;
    case FileValidDataLengthInformation:
        Result = STATUS_INVALID_PARAMETER;  /* no ValidDataLength support */
        return Result;
@@ -782,7 +971,7 @@ static NTSTATUS FspFsvolSetInformation(
    ASSERT(FileNode == FileDesc->FileNode);

    Result = FspIopCreateRequestEx(Irp, FileNameRequired ? &FileNode->FileName : 0, 0,
-        FspFsvolInformationRequestFini, &Request);
+        FspFsvolSetInformationRequestFini, &Request);
    if (!NT_SUCCESS(Result))
        return Result;

@@ -810,9 +999,6 @@ static NTSTATUS FspFsvolSetInformation(
        Result = FspFsvolSetEndOfFileInformation(FileObject, Buffer, Length,
            IrpSp->Parameters.SetFile.AdvanceOnly, Request, 0);
        break;
-    case FileRenameInformation:
-        Result = FspFsvolSetRenameInformation(FileObject, Buffer, Length, Request, 0);
-        break;
    default:
        ASSERT(0);
        Result = STATUS_INVALID_PARAMETER;
@@ -838,6 +1024,14 @@ NTSTATUS FspFsvolSetInformationComplete(
    }

    FILE_INFORMATION_CLASS FileInformationClass = IrpSp->Parameters.SetFile.FileInformationClass;
+
+    /* special case FileRenameInformation */
+    if (FileRenameInformation == FileInformationClass)
+    {
+        Result = FspFsvolSetRenameInformationSuccess(Irp, Response);
+        FSP_RETURN();
+    }
+
    PFILE_OBJECT FileObject = IrpSp->FileObject;
    FSP_FILE_NODE *FileNode = FileObject->FsContext;
    PVOID Buffer = Irp->AssociatedIrp.SystemBuffer;
@@ -859,9 +1053,6 @@ NTSTATUS FspFsvolSetInformationComplete(
        Result = FspFsvolSetEndOfFileInformation(FileObject, Buffer, Length,
            IrpSp->Parameters.SetFile.AdvanceOnly, Request, Response);
        break;
-    case FileRenameInformation:
-        Result = FspFsvolSetRenameInformation(FileObject, Buffer, Length, Request, Response);
-        break;
    default:
        ASSERT(0);
        Result = STATUS_INVALID_PARAMETER;
@@ -878,14 +1069,18 @@ NTSTATUS FspFsvolSetInformationComplete(
        IrpSp->FileObject);
 }

-static VOID FspFsvolInformationRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
+static VOID FspFsvolSetInformationRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PVOID Context[4])
 {
    PAGED_CODE();

    FSP_FILE_NODE *FileNode = Context[RequestFileNode];
+    PDEVICE_OBJECT FsvolDeviceObject = Context[RequestDeviceObject];

    if (0 != FileNode)
        FspFileNodeReleaseOwner(FileNode, Full, Request);
+
+    if (0 != FsvolDeviceObject)
+        FspFsvolDeviceFileRenameReleaseOwner(FsvolDeviceObject, Request);
 }

 NTSTATUS FspQueryInformation(
--- a/src/sys/iop.c
+++ b/src/sys/iop.c
@@ -39,48 +39,6 @@ NTSTATUS FspIopDispatchComplete(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response
 #pragma alloc_text(PAGE, FspIopDispatchComplete)
 #endif

-static const LONG Delays[] =
-{
-    -100,
-    -200,
-    -300,
-    -400,
-    -500,
-    -1000,
-};
-
-static PVOID FspAllocMustSucceed(SIZE_T Size)
-{
-    PVOID Result;
-    LARGE_INTEGER Delay;
-
-    for (ULONG i = 0, n = sizeof(Delays) / sizeof(Delays[0]);; i++)
-    {
-        Result = FspAlloc(Size);
-        if (0 != Result)
-            return Result;
-
-        Delay.QuadPart = n > i ? Delays[i] : Delays[n - 1];
-        KeDelayExecutionThread(KernelMode, FALSE, &Delay);
-    }
-}
-
-static PVOID FspAllocateIrpMustSucceed(CCHAR StackSize)
-{
-    PIRP Result;
-    LARGE_INTEGER Delay;
-
-    for (ULONG i = 0, n = sizeof(Delays) / sizeof(Delays[0]);; i++)
-    {
-        Result = IoAllocateIrp(StackSize, FALSE);
-        if (0 != Result)
-            return Result;
-
-        Delay.QuadPart = n > i ? Delays[i] : Delays[n - 1];
-        KeDelayExecutionThread(KernelMode, FALSE, &Delay);
-    }
-}
-
 typedef struct
 {
    FSP_IOP_REQUEST_FINI *RequestFini;
--- a/src/sys/util.c
+++ b/src/sys/util.c
@@ -6,6 +6,7 @@

 #include <sys/driver.h>

+VOID FspUnicodePathSuffix(PUNICODE_STRING Path, PUNICODE_STRING Remain, PUNICODE_STRING Suffix);
 NTSTATUS FspCreateGuid(GUID *Guid);
 VOID FspInitializeSynchronousWorkItem(FSP_SYNCHRONOUS_WORK_ITEM *SynchronousWorkItem,
    PWORKER_THREAD_ROUTINE Routine, PVOID Context);
@@ -17,6 +18,7 @@ VOID FspQueueDelayedWorkItem(FSP_DELAYED_WORK_ITEM *DelayedWorkItem, LARGE_INTEG
 static KDEFERRED_ROUTINE FspQueueDelayedWorkItemDPC;

 #ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE, FspUnicodePathSuffix)
 #pragma alloc_text(PAGE, FspCreateGuid)
 #pragma alloc_text(PAGE, FspInitializeSynchronousWorkItem)
 #pragma alloc_text(PAGE, FspExecuteSynchronousWorkItem)
@@ -25,6 +27,78 @@ static KDEFERRED_ROUTINE FspQueueDelayedWorkItemDPC;
 #pragma alloc_text(PAGE, FspQueueDelayedWorkItem)
 #endif

+static const LONG Delays[] =
+{
+    -100,
+    -200,
+    -300,
+    -400,
+    -500,
+    -1000,
+};
+
+PVOID FspAllocMustSucceed(SIZE_T Size)
+{
+    PVOID Result;
+    LARGE_INTEGER Delay;
+
+    for (ULONG i = 0, n = sizeof(Delays) / sizeof(Delays[0]);; i++)
+    {
+        Result = FspAlloc(Size);
+        if (0 != Result)
+            return Result;
+
+        Delay.QuadPart = n > i ? Delays[i] : Delays[n - 1];
+        KeDelayExecutionThread(KernelMode, FALSE, &Delay);
+    }
+}
+
+PVOID FspAllocateIrpMustSucceed(CCHAR StackSize)
+{
+    PIRP Result;
+    LARGE_INTEGER Delay;
+
+    for (ULONG i = 0, n = sizeof(Delays) / sizeof(Delays[0]);; i++)
+    {
+        Result = IoAllocateIrp(StackSize, FALSE);
+        if (0 != Result)
+            return Result;
+
+        Delay.QuadPart = n > i ? Delays[i] : Delays[n - 1];
+        KeDelayExecutionThread(KernelMode, FALSE, &Delay);
+    }
+}
+
+VOID FspUnicodePathSuffix(PUNICODE_STRING Path, PUNICODE_STRING Remain, PUNICODE_STRING Suffix)
+{
+    PAGED_CODE();
+
+    PWSTR PathBgn, PathEnd, PathPtr, RemainEnd, SuffixBgn;
+
+    PathBgn = Path->Buffer;
+    PathEnd = (PWSTR)((PUINT8)PathBgn + Path->Length);
+    PathPtr = PathBgn;
+
+    RemainEnd = PathEnd;
+    SuffixBgn = PathEnd;
+
+    while (PathEnd > PathPtr)
+        if (L'\\' == *PathPtr)
+        {
+            RemainEnd = PathPtr++;
+            for (; L'\\' == *PathPtr; PathPtr++)
+                ;
+            SuffixBgn = PathPtr;
+        }
+        else
+            PathPtr++;
+
+    Remain->Length = Remain->MaximumLength = (USHORT)((PUINT8)RemainEnd - (PUINT8)PathBgn);
+    Remain->Buffer = PathBgn;
+    Suffix->Length = Suffix->MaximumLength = (USHORT)((PUINT8)PathEnd - (PUINT8)SuffixBgn);
+    Suffix->Buffer = SuffixBgn;
+}
+
 NTSTATUS FspCreateGuid(GUID *Guid)
 {
    PAGED_CODE();