Block layout needs it to determine IO size.
Signed-off-by: NFred Isaman <iisaman@citi.umich.edu>
Signed-off-by: NTao Guo <glorioustao@gmail.com>
Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
Signed-off-by: NBenny Halevy <bhalevy@tonian.com>
Signed-off-by: NJim Rees <rees@umich.edu>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>