Edit

FN_VMB_CHANNEL_RESTORE_FROM_BUFFER callback function (vmbuskernelmodeclientlibapi.h)

  • Article

[Some information relates to pre-released product which may be substantially modified before it's commercially released. Microsoft makes no warranties, express or implied, with respect to the information provided here.]

The VmbChannelRestoreFromBuffer function restores the client state from previously saved state. The driver must check the return value of the function.

Syntax

FN_VMB_CHANNEL_RESTORE_FROM_BUFFER FnVmbChannelRestoreFromBuffer;

NTSTATUS FnVmbChannelRestoreFromBuffer(
  VMBCHANNEL Channel,
  PVOID Buffer,
  ULONG BufferSize
)
{...}

Parameters

Channel

A handle for a channel.

Buffer

A pointer to a buffer that contains previously saved state.

BufferSize

The size, in bytes, of the buffer.

Return value

VmbChannelRestoreFromBuffer returns one of the following status values:

Return code Description
STATUS_SUCCESS
 The function finished successfully.
STATUS_MORE_PROCESSING_REQUIRED
 State was restored successfully, but more chunks were saved.
Other status code for which NT_SUCCESS is FALSE
 The function failed.

Remarks

The caller is expected to call this function with buffers that contain whole "chunks" of stored data.

Important

This function is called through the VMBus Kernel Mode Client Library (KMCL) interface, provided by the Vmbkmcl.sys bus driver. This is a server-only function accessed from the KMCL_SERVER_ONLY_METHODS structure.

For more information, see the Remarks section of KMCL_SERVER_ONLY_METHODS.

Requirements

Requirement Value
Minimum supported client Windows 10, version 1803
Header vmbuskernelmodeclientlibapi.h