STOR_REQUEST_INFO_V1 - NtDoc

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

typedef struct _STOR_REQUEST_INFO_V1 {
  USHORT                Version;
  USHORT                Size;
  STOR_IO_PRIORITY_HINT PriorityHint;
  ULONG                 Flags;
  ULONG                 Key;
  ULONG                 Length;
  BOOLEAN               IsWriteRequest;
  UCHAR                 Reserved[3];
} STOR_REQUEST_INFO_V1, *PSTOR_REQUEST_INFO_V1;
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Windows Driver Kit DDI reference (ns-storport-_stor_request_info_v1)

_STOR_REQUEST_INFO_V1 structure

Description

The _STOR_REQUEST_INFO_V1 structure contains details about the storage driver IO request associated with a SCSI request block (SRB). _STOR_REQUEST_INFO_V1 is returned by the StorPortGetRequestInfo routine.

Members

Version

The version of this structure. Set this member to STOR_REQUEST_INFO_VER_1.

Size

The size of this structure. Set this value to sizeof(STOR_REQUEST_INFO).

PriorityHint

The priority hint set for the IO request.

Value Meaning
StorIoPriorityVeryLow

0		 Very low priority.
StorIoPriorityLow

1		 Low priority.
StorIoPriorityNormal

2		 Normal priority.
StorIoPriorityHigh

3		 High priority.
StorIoPriorityCritical

4		 Critical priority.

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.

Key

The read or write key for the request.

Length

The length of the data in this request.

IsWriteRequest

True if this is a write request. Otherwise, false, if this is a read request.

Reserved

Reserved.

Remarks

The caller to StorPortGetRequestInfo allocates the STOR_REQUEST_INFO structure. Prior to calling StorPortGetRequestInfo, Version must be set to STOR_REQUEST_INFO_VER_1 and Size must be set to sizeof(STOR_REQUEST_INFO). Otherwise, StorPortGetRequestInfo will return with a status of STOR_STATUS_INVALID_PARAMETER.

See also

StorPortGetRequestInfo

View the official Windows Driver Kit DDI reference

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