MRxShouldTryToCollapseThisOpen routine
The MRxShouldTryToCollapseThisOpen routine is called by RDBSS to request that a network mini-redirector indicate if RDBSS should try and collapse an open request onto an existing file system object.
Syntax
PMRX_CALLDOWN MRxShouldTryToCollapseThisOpen;
NTSTATUS MRxShouldTryToCollapseThisOpen(
_Inout_ PRX_CONTEXT RxContext
)
{ ... }
Parameters
RxContext [in, out]
A pointer to the RX_CONTEXT structure. This parameter contains the IRP that is requesting the operation.
Return value
MRxShouldTryToCollapseThisOpen returns STATUS_SUCCESS on success or an appropriate NTSTATUS value, such as the following:
| Return code | Description |
|---|---|
| STATUS_MORE_PROCESSING_REQUIRED | A network mini-redirector returns this value to disable collapsing of this open request. |
Remarks
MRxShouldTryToCollapseThisOpen is called to determine if an open request should not be collapsed.
Before calling MRxShouldTryToCollapseThisOpen, RDBSS modifies the following member in the RX_CONTEXT structure pointed to by the RxContext parameter:
The pRelevantSrvOpen member is set to the SRV_OPEN.
The call to MRxShouldTryToCollapseThisOpen could be a change notify request for a directory. Therefore, the network mini-redirector might not allow collapsing open requests so that change notification works correctly.
RDBSS disallows collapsing opens if the Create.NtCreateParameters.CreateOptions member of the RX_CONTEXT structure has the FILE_OPEN_FOR_BACKUP_INTENT option or the FILE_DELETE_ON_CLOSE option set.
Requirements
Target platform |
Desktop |
Header |
Mrx.h (include Mrx.h) |