ScsiPortGetSrb

PSCSI_REQUEST_BLOCK ScsiPortGetSrb(DeviceExtension, PathId, TargetId, Lun, QueueTag)
IN PVOID  DeviceExtension;
IN UCHAR  PathId;
IN UCHAR  TargetId;
IN UCHAR  Lun;
IN LONG  QueueTag;

Retrieves an active SCSI request for a particular logical unit.

• Returns a pointer to a request for the specified logical unit. If there is no outstanding request for the specified logical unit or if the QueueTag value is invalid, then NULL is returned.

DeviceExtension

Points to the miniport driver's storage for per-adapter data.

PathId

Identifies the SCSI bus.

TargetId

Identifies the target ID on the bus.

Lun

Identifies the logical unit number of the target device.

QueueTag

Specifies the queue tag if the request is tagged; SP_UNTAGGED indicates that the request is not tagged.