SRBEX_DATA_IO_INFO - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// srb.h

typedef struct _SRBEX_DATA_IO_INFO {
  SRBEXDATATYPE Type;
  ULONG         Length;
  ULONG         Flags;
  ULONG         Key;
  ULONG         RWLength;
  BOOLEAN       IsWriteRequest;
  UCHAR         CachePriority;
  UCHAR         Reserved[2];
  ULONG         Reserved1[2];
} SRBEX_DATA_IO_INFO, *PSRBEX_DATA_IO_INFO;

View the official Windows Driver Kit DDI reference
// storport.h

typedef struct _SRBEX_DATA_IO_INFO {
  SRBEXDATATYPE Type;
  ULONG         Length;
  ULONG         Flags;
  ULONG         Key;
  ULONG         RWLength;
  BOOLEAN       IsWriteRequest;
  UCHAR         CachePriority;
  UCHAR         Reserved[2];
  ULONG         Reserved1[2];
} SRBEX_DATA_IO_INFO, *PSRBEX_DATA_IO_INFO;

View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-srb-_srbex_data_io_info)

_SRBEX_DATA_IO_INFO structure (srb.h)

Description

The SRBEX_DATA_IO_INFO structure contains additional information related to a read or write request in an extended SRB.

Note The SCSI port driver and SCSI miniport driver models may be altered or unavailable in the future. Instead, we recommend using the Storport driver and Storport miniport driver models.

Members

Type

Data type indicator for the bidirectional extended SRB data structure. Set to SrbExDataTypeIoInfo.

Length

Length of the data in this structure, in bytes, starting with the Flags member. Set to SRBEX_DATA_IO_INFO_LENGTH.

Flags

Flags set for handling the request. May be a combination of these values:

Value Meaning
REQUEST_INFO_NO_CACHE_FLAG Non-cached writes are specified for this request.
REQUEST_INFO_PAGING_IO_FLAG Paging IO is specified for this request.
REQUEST_INFO_SEQUENTIAL_IO_FLAG Reads or writes are sequential.
REQUEST_INFO_TEMPORARY_FLAG The file for this request is temporary.
REQUEST_INFO_WRITE_THROUGH_FLAG No system buffering for the request.
REQUEST_INFO_HYBRID_WRITE_THROUGH_FLAG Perform a hybrid cache write through to disk

This flag is available starting with Windows 8.1 Update.
REQUEST_INFO_VALID_CACHEPRIORITY_FLAG The hybrid cache priority level is valid for this I/O.

This flag is available starting with Windows 8.1 Update.

Key

A tag value to identify a block of data transferred.

RWLength

The length, in bytes of the data to transfer.

IsWriteRequest

TRUE if the I/O operation in the SRB is a write request. Otherwise, FALSE; the I/O operation is a read request.

CachePriority

Priority level for a hybrid cache read or write.

This member is valid starting with Windows 8.1 Update.

Reserved

This member is reserved. Set to 0.

Reserved1

This member is reserved. Set to 0.

This member is present starting with Windows 8.1 Update.

See also

STORAGE_REQUEST_BLOCK

View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-storport-_srbex_data_io_info)

_SRBEX_DATA_IO_INFO structure (storport.h)

Description

The SRBEX_DATA_IO_INFO structure contains additional information related to a read or write request in an extended SRB.

Note The SCSI port driver and SCSI miniport driver models may be altered or unavailable in the future. Instead, we recommend using the Storport driver and Storport miniport driver models.

Members

Type

Data type indicator for the bidirectional extended SRB data structure. Set to SrbExDataTypeIoInfo.

Length

Length of the data in this structure, in bytes, starting with the Flags member. Set to SRBEX_DATA_IO_INFO_LENGTH.

Flags

Flags set for handling the request. May be a combination of these values:

Value Meaning
REQUEST_INFO_NO_CACHE_FLAG Non-cached writes are specified for this request.
REQUEST_INFO_PAGING_IO_FLAG Paging IO is specified for this request.
REQUEST_INFO_SEQUENTIAL_IO_FLAG Reads or writes are sequential.
REQUEST_INFO_TEMPORARY_FLAG The file for this request is temporary.
REQUEST_INFO_WRITE_THROUGH_FLAG No system buffering for the request.
REQUEST_INFO_HYBRID_WRITE_THROUGH_FLAG Perform a hybrid cache write through to disk

This flag is available starting with Windows 8.1 Update.
REQUEST_INFO_VALID_CACHEPRIORITY_FLAG The hybrid cache priority level is valid for this I/O.

This flag is available starting with Windows 8.1 Update.

Key

A tag value to identify a block of data transferred.

RWLength

The length, in bytes of the data to transfer.

IsWriteRequest

TRUE if the I/O operation in the SRB is a write request. Otherwise, FALSE; the I/O operation is a read request.

CachePriority

Priority level for a hybrid cache read or write.

This member is valid starting with Windows 8.1 Update.

Reserved

This member is reserved. Set to 0.

Reserved1

This member is reserved. Set to 0.

This member is present starting with Windows 8.1 Update.

See also

STORAGE_REQUEST_BLOCK

View the official Windows Driver Kit DDI reference

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