PMRX_COMPUTE_NEW_BUFFERING_STATE callback function (mrx.h)
TheMRxComputeNewBufferingState routine is called by RDBSS to request that the network mini-redirector compute a new buffering state change.
Syntax
PMRX_COMPUTE_NEW_BUFFERING_STATE PmrxComputeNewBufferingState;
NTSTATUS PmrxComputeNewBufferingState(
[in, out] IN OUT PMRX_SRV_OPEN SrvOpen,
[in] IN PVOID MRxContext,
[out] OUT PULONG NewBufferingState
)
{...}
Parameters
[in, out] SrvOpen
A pointer to the SRV_OPEN structure and the associated FCB structure.
[in] MRxContext
A pointer to a context parameter for use by the network mini-redirector callback.
[out] NewBufferingState
A pointer to where the new buffering state is stored when the routine returns.
Return value
MRxComputeNewBufferingState returns STATUS_SUCCESS on success or an appropriate NTSTATUS value, such as the following:
| Return code | Description |
|---|---|
| STATUS_NOT_SUPPORTED | A feature that is requested is not supported. |
Remarks
Before calling MRxComputeNewBufferingState, RDBSS sets the FcbState member of SrvOpen****->Fcb to FCB_STATE_BUFFERSTATE_CHANGING.
The Server Message Block (SMB) redirector uses MRxComputeNewBufferingState to map the SMB-specific oplock levels into the appropriate RDBSS buffering state flags. The oplock level is passed in the MrxContext parameter.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | mrx.h (include Mrx.h) |