FLT_PARAMETERS for IRP_MJ_CREATE union

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

Syntax


typedef union _FLT_PARAMETERS {
  ...    ;
  struct {
    PIO_SECURITY_CONTEXT     SecurityContext;
    ULONG                    Options;
    USHORT POINTER_ALIGNMENT FileAttributes;
    USHORT                   ShareAccess;
    USHORT POINTER_ALIGNMENT EaLength;
    PVOID                    EaBuffer;
    LARGE_INTEGER            AllocationSize;
  } Create;
  ...    ;
} FLT_PARAMETERS, *PFLT_PARAMETERS;

Members

Create

Structure containing the following members.

SecurityContext

SecurityContext->AccessState

Pointer to an ACCESS_STATE structure that contains the object's subject context, granted access types, and remaining desired access types.

SecurityContext->DesiredAccess

ACCESS_MASK structure that specifies access rights requested for the file. For more information, see the DesiredAccess parameter to FltCreateFile.

Options

Bitmask of flags that specify the options to be applied when creating or opening the file, as well as the action to be taken if the file already exists. The low 24 bits of this member correspond to the CreateOptions parameter to FltCreateFile. The high 8 bits correspond to the CreateDisposition parameter to FltCreateFile.

FileAttributes

Bitmask of attributes to be applied when creating or opening the file. For more information, see the FileAttributes parameter to FltCreateFile.

ShareAccess

Bitmask of share access rights requested for the file. If this parameter is zero, exclusive access is being requested. For more information, see the ShareAccess parameter to FltCreateFile.

EaLength

Length, in bytes, of the buffer that the EaBuffer member points to. For more information, see the EaLength parameter to FltCreateFile.

EaBuffer

Pointer to a caller-supplied, FILE_FULL_EA_INFORMATION-structured buffer that contains extended attribute (EA) information to be applied to the file. For more information, see the EaBuffer parameter to FltCreateFile.

AllocationSize

Optionally specifies the initial allocation size, in bytes, for the file. A nonzero value has no effect unless the file is being created, overwritten, or superseded. For more information, see the AllocationSize parameter to FltCreateFile.

Remarks

The FLT_PARAMETERS structure for the IRP_MJ_CREATE operation represented by a callback data (FLT_CALLBACK_DATA) structure. It is contained in an FLT_IO_PARAMETER_BLOCK structure.

IRP_MJ_CREATE is an IRP-based operation.

Requirements

Header

Fltkernel.h (include Fltkernel.h)

See also

ACCESS_MASK
ACCESS_STATE
FILE_FULL_EA_INFORMATION
FLT_CALLBACK_DATA
FLT_IO_PARAMETER_BLOCK
FLT_IS_FASTIO_OPERATION
FLT_IS_FS_FILTER_OPERATION
FLT_IS_IRP_OPERATION
FLT_PARAMETERS
FltCreateFile
IRP_MJ_CREATE

 

 

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