It is useful for testing purposes to be able to inject errors by writing
bad protection information to media with checking disabled and then
attempting to read it back. Extend scsi_debug's PI verification logic to
give the driver feature parity with commercially available drives. Almost
all devices with PI capability support RDPROTECT and WRPROTECT values of 0,
1, and 3.

Link: https://lore.kernel.org/r/20210609033929.3815-10-martin.petersen@oracle.comReviewed-by: NDouglas Gilbert <dgilbert@interlog.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>
Message-Id: <20210609033929.3815-10-martin.petersen@oracle.com>