FLT_PARAMETERS for IRP_MJ_SET_EA union

Union component used when the MajorFunction field of the FLT_IO_PARAMETER_BLOCK structure for the operation is IRP_MJ_SET_EA.

Syntax

typedef union _FLT_PARAMETERS {
  ...    ;
  struct {
    ULONG Length;
    PVOID EaBuffer;
    PMDL  MdlAddress;
  } SetEa;
  ...    ;
} FLT_PARAMETERS, *PFLT_PARAMETERS;

Members

• SetEa: Structure containing the following members.

• Length: Length, in bytes, of the buffer that EaBuffer points to.

• EaBuffer: Pointer to a caller-supplied, FILE_FULL_EA_INFORMATION-structured input buffer that contains the extended attribute (EA) values to be set. This member is optional and can be NULL if a MDL is provided in MdlAddress. See Remarks.

• MdlAddress: Address of a memory descriptor list (MDL) describing the buffer that EaBuffer points to. This member is optional and can be NULL if a buffer is provided in EaBuffer. See Remarks.

Remarks

The FLT_PARAMETERS structure for IRP_MJ_SET_EA operations contains the parameters for a set-extended-attributes-information-operation represented by a callback data (FLT_CALLBACK_DATA) structure. It is contained in an FLT_IO_PARAMETER_BLOCK structure.

If both an EaBuffer and MdlAddress buffer are provided, it is recommended that minifilters use the MDL. The memory that EaBuffer points to is valid when it is a user mode address being accessed within the context of the calling process, or if it is a kernel mode address.

If a minifilter changes the value of MdlAddress, then after its post operation callback, Filter Manager will free the MDL currently stored in MdlAddress and restore the previous value of MdlAddress.

IRP_MJ_SET_EA is an IRP-based operation.

Requirements

See also

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

IoCheckEaBufferValidity

IRP_MJ_SET_EA