Пример #1
0
NTSTATUS
Ext2WriteFile(IN PEXT2_IRP_CONTEXT IrpContext)
{
    PEXT2_VCB           Vcb = NULL;
    PEXT2_FCB           Fcb = NULL;
    PEXT2_CCB           Ccb = NULL;
    PFILE_OBJECT        FileObject = NULL;

    PDEVICE_OBJECT      DeviceObject = NULL;

    PIRP                Irp = NULL;
    PIO_STACK_LOCATION  IoStackLocation = NULL;
    PUCHAR              Buffer = NULL;

    LARGE_INTEGER       ByteOffset;
    ULONG               ReturnedLength = 0;
    ULONG               Length;

    NTSTATUS            Status = STATUS_UNSUCCESSFUL;

    BOOLEAN             OpPostIrp = FALSE;
    BOOLEAN             PagingIo = FALSE;
    BOOLEAN             Nocache = FALSE;
    BOOLEAN             SynchronousIo = FALSE;

    BOOLEAN             RecursiveWriteThrough = FALSE;
    BOOLEAN             MainResourceAcquired = FALSE;
    BOOLEAN             PagingIoResourceAcquired = FALSE;

    BOOLEAN             bDeferred = FALSE;
    BOOLEAN             UpdateFileValidSize = FALSE;
    BOOLEAN             FileSizesChanged = FALSE;
    BOOLEAN             rc;


    __try {

        ASSERT(IrpContext);
        ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
               (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));

        DeviceObject = IrpContext->DeviceObject;
        Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
        ASSERT(Vcb != NULL);
        ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
               (Vcb->Identifier.Size == sizeof(EXT2_VCB)));

        FileObject = IrpContext->FileObject;
        Fcb = (PEXT2_FCB) FileObject->FsContext;
        Ccb = (PEXT2_CCB) FileObject->FsContext2;
        ASSERT(Fcb);
        ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
               (Fcb->Identifier.Size == sizeof(EXT2_FCB)));

        Irp = IrpContext->Irp;
        IoStackLocation = IoGetCurrentIrpStackLocation(Irp);

        Length = IoStackLocation->Parameters.Write.Length;
        ByteOffset = IoStackLocation->Parameters.Write.ByteOffset;

        PagingIo = IsFlagOn(Irp->Flags, IRP_PAGING_IO);
        Nocache = IsFlagOn(Irp->Flags, IRP_NOCACHE);
        SynchronousIo = IsFlagOn(FileObject->Flags, FO_SYNCHRONOUS_IO);

        if (PagingIo) {
            ASSERT(Nocache);
        }

        DEBUG(DL_INF, ("Ext2WriteFile: %wZ Offset=%I64xh Length=%xh Paging=%xh Nocache=%xh\n",
                       &Fcb->Mcb->ShortName, ByteOffset.QuadPart, Length, PagingIo, Nocache));

        if (IsSpecialFile(Fcb) || IsInodeSymLink(Fcb->Inode) ) {
            Status = STATUS_INVALID_DEVICE_REQUEST;
            __leave;
        }

        if (IsFileDeleted(Fcb->Mcb) ||
            (IsSymLink(Fcb) && IsFileDeleted(Fcb->Mcb->Target)) ) {
            Status = STATUS_FILE_DELETED;
            __leave;
        }

        if (Length == 0) {
            Irp->IoStatus.Information = 0;
            Status = STATUS_SUCCESS;
            __leave;
        }

        if (ByteOffset.LowPart == FILE_USE_FILE_POINTER_POSITION &&
            ByteOffset.HighPart == -1) {
            ByteOffset = FileObject->CurrentByteOffset;
        } else if (IsWritingToEof(ByteOffset)) {
            ByteOffset.QuadPart = Fcb->Header.FileSize.QuadPart;
        }

        if (Nocache && !PagingIo &&
            ( (ByteOffset.LowPart & (SECTOR_SIZE - 1)) ||
               (Length & (SECTOR_SIZE - 1))) ) {
            Status = STATUS_INVALID_PARAMETER;
            __leave;
        }

        if (FlagOn(IrpContext->MinorFunction, IRP_MN_DPC)) {
            ClearFlag(IrpContext->MinorFunction, IRP_MN_DPC);
            Status = STATUS_PENDING;
            __leave;
        }

        if (!Nocache) {

            BOOLEAN bAgain = IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_DEFERRED);
            BOOLEAN bWait  = IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
            BOOLEAN bQueue = IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_REQUEUED);

            if ( !CcCanIWrite(
                        FileObject,
                        Length,
                        (bWait && bQueue),
                        bAgain ) ) {

                Status = Ext2LockUserBuffer(
                             IrpContext->Irp,
                             Length,
                             IoReadAccess);

                if (NT_SUCCESS(Status)) {
                    SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_DEFERRED);
                    CcDeferWrite( FileObject,
                                  (PCC_POST_DEFERRED_WRITE)Ext2DeferWrite,
                                  IrpContext,
                                  Irp,
                                  Length,
                                  bAgain );
                    bDeferred = TRUE;
                    Status = STATUS_PENDING;
                    __leave;
                }
            }
        }

        if (IsDirectory(Fcb) && !PagingIo) {
            Status = STATUS_INVALID_DEVICE_REQUEST;
            __leave;
        }

        if (IsFlagOn(Irp->Flags, IRP_SYNCHRONOUS_PAGING_IO) && !IrpContext->IsTopLevel) {

            PIRP TopIrp;

            TopIrp = IoGetTopLevelIrp();

            if ( (ULONG_PTR)TopIrp > FSRTL_MAX_TOP_LEVEL_IRP_FLAG &&
                    NodeType(TopIrp) == IO_TYPE_IRP) {

                PIO_STACK_LOCATION IrpStack;

                IrpStack = IoGetCurrentIrpStackLocation(TopIrp);

                if ((IrpStack->MajorFunction == IRP_MJ_WRITE) &&
                    (IrpStack->FileObject->FsContext == FileObject->FsContext) &&
                    !FlagOn(TopIrp->Flags, IRP_NOCACHE) ) {

                    SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WRITE_THROUGH);
                    RecursiveWriteThrough = TRUE;
                }
            }
        }

        if (PagingIo) {

            if (!ExAcquireResourceSharedLite(&Fcb->PagingIoResource, TRUE)) {
                Status = STATUS_PENDING;
                __leave;
            }
            PagingIoResourceAcquired = TRUE;

            if ( (ByteOffset.QuadPart + Length) > Fcb->Header.FileSize.QuadPart) {

                if (ByteOffset.QuadPart >= Fcb->Header.AllocationSize.QuadPart) {

                    Status = STATUS_SUCCESS;
                    Irp->IoStatus.Information = 0;
                    __leave;

                } else {

                    ReturnedLength = (ULONG)(Fcb->Header.FileSize.QuadPart - ByteOffset.QuadPart);
                    if (ByteOffset.QuadPart + Length > Fcb->Header.AllocationSize.QuadPart)
                        Length = (ULONG)(Fcb->Header.AllocationSize.QuadPart - ByteOffset.QuadPart);
                }

            } else {

                ReturnedLength = Length;
            }

        } else {

            if (!Ext2CheckFileAccess(Vcb, Fcb->Mcb, Ext2FileCanWrite)) {
                Status = STATUS_ACCESS_DENIED;
                __leave;
            }

            if (IsDirectory(Fcb)) {
                __leave;
            }

            if (!ExAcquireResourceExclusiveLite(&Fcb->MainResource, TRUE)) {
                Status = STATUS_PENDING;
                __leave;
            }
            MainResourceAcquired = TRUE;

            //
            //  Do flushing for such cases
            //
            if (Nocache && Ccb != NULL && Fcb->SectionObject.DataSectionObject != NULL)  {

                ExAcquireSharedStarveExclusive( &Fcb->PagingIoResource, TRUE);
                ExReleaseResourceLite(&Fcb->PagingIoResource);

                CcFlushCache( &(Fcb->SectionObject),
                              &ByteOffset,
                              CEILING_ALIGNED(ULONG, Length, BLOCK_SIZE),
                              &(Irp->IoStatus));
                ClearLongFlag(Fcb->Flags, FCB_FILE_MODIFIED);

                if (!NT_SUCCESS(Irp->IoStatus.Status)) {
                    Status = Irp->IoStatus.Status;
                    __leave;
                }

                ExAcquireSharedStarveExclusive( &Fcb->PagingIoResource, TRUE);
                ExReleaseResourceLite(&Fcb->PagingIoResource);

                CcPurgeCacheSection( &(Fcb->SectionObject),
                                     &(ByteOffset),
                                     CEILING_ALIGNED(ULONG, Length, BLOCK_SIZE),
                                     FALSE );
            }

            if (!FsRtlCheckLockForWriteAccess(&Fcb->FileLockAnchor, Irp)) {
                Status = STATUS_FILE_LOCK_CONFLICT;
                __leave;
            }

            if (Ccb != NULL) {

                Status = FsRtlCheckOplock( &Fcb->Oplock,
                                           Irp,
                                           IrpContext,
                                           Ext2OplockComplete,
                                           Ext2LockIrp );

                if (Status != STATUS_SUCCESS) {
                    OpPostIrp = TRUE;
                    __leave;
                }

                //
                //  Set the flag indicating if Fast I/O is possible
                //

                Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb);
            }

            //
            //  Extend the inode size when the i/o is beyond the file end ?
            //

            if ((ByteOffset.QuadPart + Length) > Fcb->Header.FileSize.QuadPart) {

                LARGE_INTEGER AllocationSize, Last;

                if (!ExAcquireResourceExclusiveLite(&Fcb->PagingIoResource, TRUE)) {
                    Status = STATUS_PENDING;
                    __leave;
                }
                PagingIoResourceAcquired = TRUE;

                /* let this irp wait, since it has to be synchronous */
                SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);

                Last.QuadPart = Fcb->Header.AllocationSize.QuadPart;
                AllocationSize.QuadPart = (LONGLONG)(ByteOffset.QuadPart + Length);
                AllocationSize.QuadPart = CEILING_ALIGNED(ULONGLONG,
                                          (ULONGLONG)AllocationSize.QuadPart,
                                          (ULONGLONG)BLOCK_SIZE);

                /* tell Ext2ExpandFile to allocate unwritten extent or NULL blocks
                   for indirect files, otherwise we might get gabage data in holes */
                IrpContext->MajorFunction += IRP_MJ_MAXIMUM_FUNCTION;
                Status = Ext2ExpandFile(IrpContext, Vcb, Fcb->Mcb, &AllocationSize);
                IrpContext->MajorFunction -= IRP_MJ_MAXIMUM_FUNCTION;
                if (AllocationSize.QuadPart > Last.QuadPart) {
                    Fcb->Header.AllocationSize.QuadPart = AllocationSize.QuadPart;
                    SetLongFlag(Fcb->Flags, FCB_ALLOC_IN_WRITE);
                }
                ExReleaseResourceLite(&Fcb->PagingIoResource);
                PagingIoResourceAcquired = FALSE;

                if (ByteOffset.QuadPart >= Fcb->Header.AllocationSize.QuadPart) {
                    if (NT_SUCCESS(Status)) {
                        DbgBreak();
                        Status = STATUS_UNSUCCESSFUL;
                    }
                    __leave;
                }

                if (ByteOffset.QuadPart + Length > Fcb->Header.AllocationSize.QuadPart) {
                    Length = (ULONG)(Fcb->Header.AllocationSize.QuadPart - ByteOffset.QuadPart);
                }

                Fcb->Header.FileSize.QuadPart = Fcb->Inode->i_size = ByteOffset.QuadPart + Length;
                Ext2SaveInode(IrpContext, Vcb, Fcb->Inode);

                if (CcIsFileCached(FileObject)) {
                    CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize)));
                }

                FileObject->Flags |= FO_FILE_SIZE_CHANGED | FO_FILE_MODIFIED;
                FileSizesChanged = TRUE;

                if (Fcb->Header.FileSize.QuadPart >= 0x80000000 &&
                        !IsFlagOn(SUPER_BLOCK->s_feature_ro_compat, EXT2_FEATURE_RO_COMPAT_LARGE_FILE)) {
                    SetFlag(SUPER_BLOCK->s_feature_ro_compat, EXT2_FEATURE_RO_COMPAT_LARGE_FILE);
                    Ext2SaveSuper(IrpContext, Vcb);
                }

                DEBUG(DL_IO, ("Ext2WriteFile: expanding %wZ to FS: %I64xh FA: %I64xh\n",
                              &Fcb->Mcb->ShortName, Fcb->Header.FileSize.QuadPart,
                              Fcb->Header.AllocationSize.QuadPart));
            }

            ReturnedLength = Length;
        }

        if (!Nocache) {

            if (FileObject->PrivateCacheMap == NULL) {
                CcInitializeCacheMap(
                    FileObject,
                    (PCC_FILE_SIZES)(&Fcb->Header.AllocationSize),
                    FALSE,
                    &Ext2Global->CacheManagerCallbacks,
                    Fcb );

                CcSetReadAheadGranularity(
                    FileObject,
                    READ_AHEAD_GRANULARITY );
            }

            if (FlagOn(IrpContext->MinorFunction, IRP_MN_MDL)) {

                CcPrepareMdlWrite(
                    FileObject,
                    &ByteOffset,
                    Length,
                    &Irp->MdlAddress,
                    &Irp->IoStatus );

                Status = Irp->IoStatus.Status;

            } else {

                Buffer = Ext2GetUserBuffer(Irp);
                if (Buffer == NULL) {
                    DbgBreak();
                    Status = STATUS_INVALID_USER_BUFFER;
                    __leave;
                }

                if (ByteOffset.QuadPart > Fcb->Header.ValidDataLength.QuadPart) {

                    /* let this irp wait, since it has to be synchronous */
                    SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);

                    rc = Ext2ZeroData(IrpContext, Vcb, FileObject,
                                      &Fcb->Header.ValidDataLength, &ByteOffset);
                    if (!rc) {
                        Status = STATUS_PENDING;
                        DbgBreak();
                        __leave;
                    }
                }

                if (!CcCopyWrite(FileObject, &ByteOffset, Length, Ext2CanIWait(), Buffer)) {
                    if (Ext2CanIWait() || 
                        !CcCopyWrite(FileObject,  &ByteOffset, Length, TRUE, Buffer)) {
                        Status = STATUS_PENDING;
                        DbgBreak();
                        __leave;
                    }
                }

                if (ByteOffset.QuadPart + Length > Fcb->Header.ValidDataLength.QuadPart ) {

                    if (Fcb->Header.FileSize.QuadPart < ByteOffset.QuadPart + Length) {
                        Fcb->Header.ValidDataLength.QuadPart = Fcb->Header.FileSize.QuadPart;
                    } else {
                        if (Fcb->Header.ValidDataLength.QuadPart < ByteOffset.QuadPart + Length)
                            Fcb->Header.ValidDataLength.QuadPart = ByteOffset.QuadPart + Length;
                    }

                    CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize)));
                    FileSizesChanged = TRUE;
                }

                Status = STATUS_SUCCESS;
            }

            if (NT_SUCCESS(Status)) {
                Irp->IoStatus.Information = Length;
                if (IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK)) {
                    DEBUG(DL_FLP, ("Ext2WriteFile is starting FlushingDpc...\n"));
                    Ext2StartFloppyFlushDpc(Vcb, Fcb, FileObject);
                }
            }

        } else {

            if (!PagingIo && !RecursiveWriteThrough && !IsLazyWriter(Fcb)) {
                if (ByteOffset.QuadPart > Fcb->Header.ValidDataLength.QuadPart) {

                    /* let this irp wait, since it has to be synchronous */
                    SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
                    rc = Ext2ZeroData(IrpContext, Vcb, FileObject,
                                      &Fcb->Header.ValidDataLength,
                                      &ByteOffset);
                    if (!rc) {
                        Status = STATUS_PENDING;
                        DbgBreak();
                        __leave;
                    }
                }
            }

            Status = Ext2LockUserBuffer(
                         IrpContext->Irp,
                         Length,
                         IoReadAccess );

            if (!NT_SUCCESS(Status)) {
                __leave;
            }

            Irp->IoStatus.Status = STATUS_SUCCESS;
            Irp->IoStatus.Information = ReturnedLength;

            Status = Ext2WriteInode(
                         IrpContext,
                         Vcb,
                         Fcb->Mcb,
                         (ULONGLONG)(ByteOffset.QuadPart),
                         NULL,
                         ReturnedLength,
                         TRUE,
                         &Length
                     );

            Irp = IrpContext->Irp;

            if (NT_SUCCESS(Status) && !RecursiveWriteThrough && !IsLazyWriter(Fcb)) {

                if (ByteOffset.QuadPart + Length > Fcb->Header.ValidDataLength.QuadPart ) {

                    FileSizesChanged = TRUE;

                    if (Fcb->Header.FileSize.QuadPart < ByteOffset.QuadPart + Length) {
                        if (!PagingIo)
                            Fcb->Header.FileSize.QuadPart = ByteOffset.QuadPart + Length;
                        Fcb->Header.ValidDataLength.QuadPart = Fcb->Header.FileSize.QuadPart;
                    } else {
                        if (Fcb->Header.ValidDataLength.QuadPart < ByteOffset.QuadPart + Length)
                            Fcb->Header.ValidDataLength.QuadPart = ByteOffset.QuadPart + Length;
                    }

                    if (!PagingIo && CcIsFileCached(FileObject)) {
                        CcSetFileSizes(FileObject, (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize)));
                    }

                    DEBUG(DL_IO, ("Ext2WriteFile: %wZ written FS: %I64xh FA: %I64xh BO: %I64xh LEN: %u\n",
                                  &Fcb->Mcb->ShortName, Fcb->Header.FileSize.QuadPart,
                                   Fcb->Header.AllocationSize.QuadPart, ByteOffset.QuadPart, Length));
                }
            }
        }

        if (FileSizesChanged) {
            FileObject->Flags |= FO_FILE_SIZE_CHANGED | FO_FILE_MODIFIED;
            Ext2NotifyReportChange( IrpContext,  Vcb, Fcb->Mcb,
                                    FILE_NOTIFY_CHANGE_SIZE,
                                    FILE_ACTION_MODIFIED );
        }

    } __finally {

        /*
         *  in case we got excpetions, we need revert MajorFunction
         *  back to IRP_MJ_WRITE. The reason we do this, is to tell
         *  Ext2ExpandFile to allocate unwritten extent or don't add
         *  new blocks for indirect files.
         */
        if (IrpContext->MajorFunction > IRP_MJ_MAXIMUM_FUNCTION)
            IrpContext->MajorFunction -= IRP_MJ_MAXIMUM_FUNCTION;

        if (Irp) {
            if (PagingIoResourceAcquired) {
                ExReleaseResourceLite(&Fcb->PagingIoResource);
            }

            if (MainResourceAcquired) {
                ExReleaseResourceLite(&Fcb->MainResource);
            }
        }

        if (!OpPostIrp && !IrpContext->ExceptionInProgress) {

            if (Irp) {

                if (Status == STATUS_PENDING ||
                        Status == STATUS_CANT_WAIT ) {

                    if (!bDeferred) {
                        Status = Ext2QueueRequest(IrpContext);
                    }

                } else {

                    if (NT_SUCCESS(Status) && !PagingIo) {

                        if (SynchronousIo) {
                            FileObject->CurrentByteOffset.QuadPart =
                                ByteOffset.QuadPart + Irp->IoStatus.Information;
                        }

                        SetFlag(FileObject->Flags, FO_FILE_MODIFIED);
                        SetLongFlag(Fcb->Flags, FCB_FILE_MODIFIED);
                    }

                    Ext2CompleteIrpContext(IrpContext, Status);
                }
            } else {
                Ext2FreeIrpContext(IrpContext);
            }
        }
    }

    DEBUG(DL_IO, ("Ext2WriteFile: %wZ written at Offset=%I64xh Length=%xh PagingIo=%d Nocache=%d "
                  "RetLen=%xh VDL=%I64xh FileSize=%I64xh i_size=%I64xh Status=%xh\n",
                  &Fcb->Mcb->ShortName, ByteOffset, Length, PagingIo, Nocache, ReturnedLength,
                  Fcb->Header.ValidDataLength.QuadPart,Fcb->Header.FileSize.QuadPart,
                  Fcb->Inode->i_size, Status));

    return Status;
}
Пример #2
0
NTSTATUS
Ext2Cleanup (IN PEXT2_IRP_CONTEXT IrpContext)
{
    PDEVICE_OBJECT  DeviceObject;
    NTSTATUS        Status = STATUS_SUCCESS;
    PEXT2_VCB       Vcb;
    PFILE_OBJECT    FileObject;
    PEXT2_FCB       Fcb;
    PEXT2_CCB       Ccb;
    PIRP            Irp;
    PEXT2_MCB       Mcb;


    BOOLEAN         VcbResourceAcquired = FALSE;
    BOOLEAN         FcbResourceAcquired = FALSE;
    BOOLEAN         FcbPagingIoResourceAcquired = FALSE;

    __try {

        ASSERT(IrpContext != NULL);
        ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
               (IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));

        DeviceObject = IrpContext->DeviceObject;
        if (IsExt2FsDevice(DeviceObject))  {
            Status = STATUS_SUCCESS;
            __leave;
        }

        Irp = IrpContext->Irp;
        Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
        ASSERT(Vcb != NULL);
        ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
               (Vcb->Identifier.Size == sizeof(EXT2_VCB)));

        if (!IsVcbInited(Vcb)) {
            Status = STATUS_SUCCESS;
            __leave;
        }

        FileObject = IrpContext->FileObject;
        Fcb = (PEXT2_FCB) FileObject->FsContext;
        if (!Fcb || (Fcb->Identifier.Type != EXT2VCB &&
                     Fcb->Identifier.Type != EXT2FCB)) {
            Status = STATUS_SUCCESS;
            __leave;
        }
        Mcb = Fcb->Mcb;
        Ccb = (PEXT2_CCB) FileObject->FsContext2;

        if (IsFlagOn(FileObject->Flags, FO_CLEANUP_COMPLETE)) {
            Status = STATUS_SUCCESS;
            __leave;
        }

        VcbResourceAcquired =
            ExAcquireResourceExclusiveLite(
                &Vcb->MainResource,
                IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)
            );

        if (Fcb->Identifier.Type == EXT2VCB) {

            if (IsFlagOn(Vcb->Flags, VCB_VOLUME_LOCKED) &&
                    (Vcb->LockFile == FileObject) ) {

                ClearFlag(Vcb->Flags, VCB_VOLUME_LOCKED);
                Vcb->LockFile = NULL;
                Ext2ClearVpbFlag(Vcb->Vpb, VPB_LOCKED);
            }

            if (Ccb) {
                Ext2DerefXcb(&Vcb->OpenHandleCount);
                Ext2DerefXcb(&Vcb->OpenVolumeCount);
            }

            IoRemoveShareAccess(FileObject, &Vcb->ShareAccess);

            Status = STATUS_SUCCESS;
            __leave;
        }

        ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
               (Fcb->Identifier.Size == sizeof(EXT2_FCB)));

        if (IsFlagOn(FileObject->Flags, FO_CLEANUP_COMPLETE)) {
            if (IsFlagOn(FileObject->Flags, FO_FILE_MODIFIED) &&
                    IsFlagOn(Vcb->Flags, VCB_FLOPPY_DISK) &&
                    !IsFlagOn(Vcb->Flags, VCB_WRITE_PROTECTED) ) {
                Status = Ext2FlushFile(IrpContext, Fcb, Ccb);
            }
            __leave;
        }

        if (Ccb == NULL) {
            Status = STATUS_SUCCESS;
            __leave;
        }

        if (IsDirectory(Fcb)) {
            if (IsFlagOn(Ccb->Flags, CCB_DELETE_ON_CLOSE))  {
                SetLongFlag(Fcb->Flags, FCB_DELETE_PENDING);

                FsRtlNotifyFullChangeDirectory(
                    Vcb->NotifySync,
                    &Vcb->NotifyList,
                    Ccb,
                    NULL,
                    FALSE,
                    FALSE,
                    0,
                    NULL,
                    NULL,
                    NULL );
            }

            FsRtlNotifyCleanup(Vcb->NotifySync, &Vcb->NotifyList, Ccb);

        }

        ExReleaseResourceLite(&Vcb->MainResource);
        VcbResourceAcquired = FALSE;

        FcbResourceAcquired =
            ExAcquireResourceExclusiveLite(
                &Fcb->MainResource,
                IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)
            );

        ASSERT((Ccb->Identifier.Type == EXT2CCB) &&
               (Ccb->Identifier.Size == sizeof(EXT2_CCB)));

        Ext2DerefXcb(&Vcb->OpenHandleCount);
        Ext2DerefXcb(&Fcb->OpenHandleCount);

        if (IsFlagOn(FileObject->Flags, FO_FILE_MODIFIED)) {
            Fcb->Mcb->FileAttr |= FILE_ATTRIBUTE_ARCHIVE;
        }

        if (IsDirectory(Fcb)) {

            ext3_release_dir(Fcb->Inode, &Ccb->filp);

        } else {

            if ( IsFlagOn(FileObject->Flags, FO_FILE_MODIFIED) &&
                    !IsFlagOn(Ccb->Flags, CCB_LAST_WRITE_UPDATED)) {

                LARGE_INTEGER   SysTime;
                KeQuerySystemTime(&SysTime);

                Fcb->Inode->i_atime =
                    Fcb->Inode->i_mtime = Ext2LinuxTime(SysTime);
                Fcb->Mcb->LastAccessTime =
                    Fcb->Mcb->LastWriteTime = Ext2NtTime(Fcb->Inode->i_atime);

                Ext2SaveInode(IrpContext, Vcb, Fcb->Inode);

                Ext2NotifyReportChange(
                    IrpContext,
                    Vcb,
                    Fcb->Mcb,
                    FILE_NOTIFY_CHANGE_ATTRIBUTES |
                    FILE_NOTIFY_CHANGE_LAST_WRITE |
                    FILE_NOTIFY_CHANGE_LAST_ACCESS,
                    FILE_ACTION_MODIFIED );
            }

            FsRtlCheckOplock( &Fcb->Oplock,
                              Irp,
                              IrpContext,
                              NULL,
                              NULL );

            Fcb->Header.IsFastIoPossible = Ext2IsFastIoPossible(Fcb);

            if (!IsFlagOn(FileObject->Flags, FO_CACHE_SUPPORTED)) {
                Fcb->NonCachedOpenCount--;
            }

            if (IsFlagOn(Ccb->Flags, CCB_DELETE_ON_CLOSE))  {
                SetLongFlag(Fcb->Flags, FCB_DELETE_PENDING);
            }

            //
            // Drop any byte range locks this process may have on the file.
            //

            FsRtlFastUnlockAll(
                &Fcb->FileLockAnchor,
                FileObject,
                IoGetRequestorProcess(Irp),
                NULL  );

            //
            // If there are no byte range locks owned by other processes on the
            // file the fast I/O read/write functions doesn't have to check for
            // locks so we set IsFastIoPossible to FastIoIsPossible again.
            //
            if (!FsRtlGetNextFileLock(&Fcb->FileLockAnchor, TRUE)) {
                if (Fcb->Header.IsFastIoPossible != FastIoIsPossible) {
#if EXT2_DEBUG
                    DEBUG(DL_INF, (": %-16.16s %-31s %wZ\n",
                                   Ext2GetCurrentProcessName(),
                                   "FastIoIsPossible",
                                   &Fcb->Mcb->FullName
                                  ));
#endif

                    Fcb->Header.IsFastIoPossible = FastIoIsPossible;
                }
            }

            if (Fcb->OpenHandleCount == 0 &&
                    (IsFlagOn(Fcb->Flags, FCB_ALLOC_IN_CREATE) ||
                     IsFlagOn(Fcb->Flags, FCB_ALLOC_IN_WRITE)) ) {

                LARGE_INTEGER Size;

                ExAcquireResourceExclusiveLite(&Fcb->PagingIoResource, TRUE);
                FcbPagingIoResourceAcquired = TRUE;

                Size.QuadPart = CEILING_ALIGNED(ULONGLONG,
                                                (ULONGLONG)Fcb->Mcb->Inode.i_size,
                                                (ULONGLONG)BLOCK_SIZE);
                if (!IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING)) {

                    Ext2TruncateFile(IrpContext, Vcb, Fcb->Mcb, &Size);
                    Fcb->Header.ValidDataLength.QuadPart =
                        Fcb->Header.FileSize.QuadPart = Fcb->Mcb->Inode.i_size;
                    Fcb->Header.AllocationSize = Size;
                    if (CcIsFileCached(FileObject)) {
                        CcSetFileSizes(FileObject,
                                       (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize)));
                    }
                }
                ClearLongFlag(Fcb->Flags, FCB_ALLOC_IN_CREATE|FCB_ALLOC_IN_WRITE);
                ExReleaseResourceLite(&Fcb->PagingIoResource);
                FcbPagingIoResourceAcquired = FALSE;
            }
        }

        if (IsFlagOn(Fcb->Flags, FCB_DELETE_PENDING)) {

            if (Fcb->OpenHandleCount == 0 || (Mcb = Ccb->SymLink)) {

                //
                // Ext2DeleteFile will acquire these lock inside
                //

                if (FcbResourceAcquired) {
                    ExReleaseResourceLite(&Fcb->MainResource);
                    FcbResourceAcquired = FALSE;
                }

                //
                //  this file is to be deleted ...
                //
                if (Ccb->SymLink) {
                    Mcb = Ccb->SymLink;
                    FileObject->DeletePending = FALSE;
                }

                Status = Ext2DeleteFile(IrpContext, Vcb, Fcb, Mcb);

                if (NT_SUCCESS(Status)) {
                    if (IsMcbDirectory(Mcb)) {
                        Ext2NotifyReportChange( IrpContext, Vcb, Mcb,
                                                FILE_NOTIFY_CHANGE_DIR_NAME,
                                                FILE_ACTION_REMOVED );
                    } else {
                        Ext2NotifyReportChange( IrpContext, Vcb, Mcb,
                                                FILE_NOTIFY_CHANGE_FILE_NAME,
                                                FILE_ACTION_REMOVED );
                    }
                }

                //
                // re-acquire the main resource lock
                //

                FcbResourceAcquired =
                    ExAcquireResourceExclusiveLite(
                        &Fcb->MainResource,
                        IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)
                    );

                if (CcIsFileCached(FileObject)) {
                    CcSetFileSizes(FileObject,
                                   (PCC_FILE_SIZES)(&(Fcb->Header.AllocationSize)));
                    SetFlag(FileObject->Flags, FO_FILE_MODIFIED);
                }
            }
        }

        if (!IsDirectory(Fcb)) {

            if ( IsFlagOn(FileObject->Flags, FO_CACHE_SUPPORTED) &&
                    (Fcb->NonCachedOpenCount + 1 == Fcb->ReferenceCount) &&
                    (Fcb->SectionObject.DataSectionObject != NULL)) {

                if (!IsFlagOn(Vcb->Flags, VCB_READ_ONLY) &&
                        !IsFlagOn(Vcb->Flags, VCB_WRITE_PROTECTED) ) {
                    CcFlushCache(&Fcb->SectionObject, NULL, 0, NULL);
                }

                if (ExAcquireResourceExclusiveLite(&(Fcb->PagingIoResource), TRUE)) {
                    ExReleaseResourceLite(&(Fcb->PagingIoResource));
                }

                CcPurgeCacheSection( &Fcb->SectionObject,
                                     NULL,
                                     0,
                                     FALSE );
            }

            CcUninitializeCacheMap(FileObject, NULL, NULL);
        }

        IoRemoveShareAccess(FileObject, &Fcb->ShareAccess);

        DEBUG(DL_INF, ( "Ext2Cleanup: OpenCount=%u ReferCount=%u NonCahcedCount=%xh %wZ\n",
                        Fcb->OpenHandleCount, Fcb->ReferenceCount, Fcb->NonCachedOpenCount, &Fcb->Mcb->FullName));

        Status = STATUS_SUCCESS;

        if (FileObject) {
            SetFlag(FileObject->Flags, FO_CLEANUP_COMPLETE);
        }

    } __finally {

        if (FcbPagingIoResourceAcquired) {
            ExReleaseResourceLite(&Fcb->PagingIoResource);
        }

        if (FcbResourceAcquired) {
            ExReleaseResourceLite(&Fcb->MainResource);
        }

        if (VcbResourceAcquired) {
            ExReleaseResourceLite(&Vcb->MainResource);
        }

        if (!IrpContext->ExceptionInProgress) {
            if (Status == STATUS_PENDING) {
                Ext2QueueRequest(IrpContext);
            } else {
                IrpContext->Irp->IoStatus.Status = Status;
                Ext2CompleteIrpContext(IrpContext, Status);
            }
        }
    }

    return Status;
}