tree 85fad84ab7a257e1da2465711e6af8569934cf7c
parent 49bd665c5407a453736d3232ee58f2906b42e83c
author Martin K. Petersen <martin.petersen@oracle.com> 1347985170 -0400
committer James Bottomley <JBottomley@Parallels.com> 1352869891 -0800

[SCSI] Add a report opcode helper

The REPORT SUPPORTED OPERATION CODES command can be used to query
whether a given opcode is supported by a device. Add a helper function
that allows us to look up commands.

We only issue RSOC if the device reports compliance with SPC-3 or
later. But to err on the side of caution we disable the command for ATA,
FireWire and USB.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>