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FLT_PARAMETERS for IRP_MJ_NETWORK_QUERY_OPEN union

  • Article

The following union component is used when the MajorFunction field of the FLT_IO_PARAMETER_BLOCK structure for the operation is IRP_MJ_NETWORK_QUERY_OPEN.

Syntax

typedef union _FLT_PARAMETERS {
  ...    ;
  struct {
    PIRP                           Irp;
    PFILE_NETWORK_OPEN_INFORMATION NetworkInformation;
  } NetworkQueryOpen;
  ...    ;
} FLT_PARAMETERS, *PFLT_PARAMETERS;

Members

  • NetworkQueryOpen: Structure containing the following members.

  • Irp: Pointer to a create IRP that represents this open operation. This IRP is to be used by the file system for common open/create code but not actually completed.

  • NetworkInformation: Pointer to a FILE_NETWORK_OPEN_INFORMATION-structured buffer to receive the requested information about the file.

Remarks

The FLT_PARAMETERS structure for IRP_MJ_NETWORK_QUERY_OPEN operations contains the parameters for a NetworkQueryOpen operation represented by a (FLT_CALLBACK_DATA) structure. The FLT_PARAMETERS structure is contained in an FLT_IO_PARAMETER_BLOCK structure.

Note

The file object associated with IRP_MJ_NETWORK_QUERY_OPEN is a stack-based object. A filter registered for the NetworkQueryOpen callback must not reference this object. That is, don't call ObReferenceObject or ObDereferenceObject on this stack-based file object, and don't save a pointer to the object.

IRP_MJ_NETWORK_QUERY_OPEN is a fast I/O operation. It's the equivalent of the FastIoQueryOpen (not FastIoQueryNetworkOpenInfo) operation. A filter can reject the operation in its pre-operation callback using FLT_PREOP_DISALLOW_FASTIO. It can't reject the operation in its post-operation callback since the file system has already completed the operation and the data is present.

Requirements

Requirement type Requirement
Header Fltkernel.h (include Fltkernel.h)

See also

FILE_NETWORK_OPEN_INFORMATION

FLT_CALLBACK_DATA

FLT_IO_PARAMETER_BLOCK

FLT_IS_FASTIO_OPERATION

FLT_IS_FS_FILTER_OPERATION

FLT_IS_IRP_OPERATION

FLT_PARAMETERS

FltQueryInformationFile

IRP_MJ_QUERY_INFORMATION

ZwQueryInformationFile