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The following union component is used when the MajorFunction field of the FLT_IO_PARAMETER_BLOCK structure for the operation is IRP_MJ_ACQUIRE_FOR_MOD_WRITE.
Syntax
typedef union _FLT_PARAMETERS {
... ;
struct {
PLARGE_INTEGER EndingOffset;
PERESOURCE *ResourceToRelease;
} AcquireForModifiedPageWriter;
... ;
} FLT_PARAMETERS, *PFLT_PARAMETERS;
Members
AcquireForModifiedPageWriter: Structure containing the following members.
EndingOffset: Pointer to a variable that contains the offset of the last byte being written plus one.
ResourceToRelease: Pointer to a pointer to the resource (ERESOURCE) to be acquired.
Remarks
The FLT_PARAMETERS structure for IRP_MJ_ACQUIRE_FOR_MOD_WRITE operations contains the parameters for an AcquireForModifiedPageWriter operation represented by a callback data (FLT_CALLBACK_DATA) structure. It is contained in an FLT_IO_PARAMETER_BLOCK structure.
IRP_MJ_ACQUIRE_FOR_MOD_WRITE is a file system (FSFilter) callback operation. In this operation, ResourceToRelease is a pointer to the pointer to the resource to acquire (pre-operation) or that was acquired (post-operation). The resource will be released in an IRP_MJ_RELEASE_FOR_MOD_WRITE callback operation.
For more information about FSFilter callback operations, see the reference entry for FsRtlRegisterFileSystemFilterCallbacks.
Requirements
| Requirement type | Requirement |
|---|---|
| Header | Fltkernel.h (include Fltkernel.h) |