Obtaining information about the file in lowest device driver

Hi gurus!

Is it possible to get information (file handle) which file belongs to a
requested sector to pass this info into my SCSI block device?
Suppose I’m sitting in SCSI port filter. How can I get this info at this
level when I get read/write requests? Can I ask file system filter
driver (suppose I have it) which knows about files and occupied
sectors? and how?

With best regards,
Alexander Sinitsyn.