Function Ext2SetFileInformation

Ext4Fsd/fileinfo.c:499–1060

NTSTATUS
Ext2SetFileInformation (IN PEXT2_IRP_CONTEXT IrpContext)
{
    PDEVICE_OBJECT          DeviceObject;
    NTSTATUS                Status = STATUS_UNSUCCESSFUL;
    PEXT2_VCB               Vcb = NULL;
    PFILE_OBJECT            FileObject = NULL;
    PEXT2_FCB               Fcb = NULL;
    PEXT2_CCB               Ccb = NULL;
    PEXT2_MCB               Mcb = NULL;
    PIRP                    Irp = NULL;
    PIO_STACK_LOCATION      IoStackLocation = NULL;
    FILE_INFORMATION_CLASS  FileInformationClass;

    ULONG                   NotifyFilter = 0;

    ULONG                   Length;
    PVOID                   Buffer;

    BOOLEAN                 FcbMainResourceAcquired = FALSE;
    BOOLEAN                 FcbPagingIoResourceAcquired = FALSE;

    __try {

        ASSERT(IrpContext != NULL);

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

        //
        // This request is not allowed on the main device object
        //
        if (IsExt2FsDevice(DeviceObject)) {
            Status = STATUS_INVALID_DEVICE_REQUEST;
            __leave;
        }

        /* check io stack location of irp stack */
        Irp = IrpContext->Irp;
        IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
        FileInformationClass =
            IoStackLocation->Parameters.SetFile.FileInformationClass;
        Length = IoStackLocation->Parameters.SetFile.Length;
        Buffer = Irp->AssociatedIrp.SystemBuffer;

        /* check Vcb */
        Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
        ASSERT(Vcb != NULL);
        ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
               (Vcb->Identifier.Size == sizeof(EXT2_VCB)));
        if (!IsMounted(Vcb)) {
            Status = STATUS_INVALID_DEVICE_REQUEST;
            __leave;
        }

        if (FlagOn(Vcb->Flags, VCB_VOLUME_LOCKED)) {
            Status = STATUS_ACCESS_DENIED;