// spb.h

typedef enum SPB_TRANSFER_BUFFER_FORMAT {
  SpbTransferBufferFormatInvalid,
  SpbTransferBufferFormatSimple,
  SpbTransferBufferFormatList,
  SpbTransferBufferFormatSimpleNonPaged,
  SpbTransferBufferFormatMdl,
  SpbTransferBufferFormatMax
}  *PSPB_TRANSFER_BUFFER_FORMAT;
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Windows Driver Kit DDI reference (ne-spb-spb_transfer_buffer_format)

SPB_TRANSFER_BUFFER_FORMAT enumeration

Description

The SPB_TRANSFER_BUFFER_FORMAT enumeration specifies the format of the buffer that is described by an SPB_TRANSFER_BUFFER structure.

Constants

`SpbTransferBufferFormatInvalid`

Reserved for use by the operating system.

`SpbTransferBufferFormatSimple`

The transfer buffer is described by a simple user-mode or kernel-mode pointer and a length.

`SpbTransferBufferFormatList`

The transfer buffer is described by a pointer to a list of buffers and a count of the number of buffers in the list.

`SpbTransferBufferFormatSimpleNonPaged`

The transfer buffer is described by a simple user-mode or kernel-mode pointer and a length. The buffer resides in non-paged memory. This format value is valid only if the client that originates the I/O request is a kernel-mode driver.

`SpbTransferBufferFormatMdl`

The transfer buffer is described by a pointer to an MDL. This format value is valid only if the client that originates the I/O request is a kernel-mode driver.

`SpbTransferBufferFormatMax`