Since the NUMBER OF LOGICAL BLOCKS field in the COMPARE AND WRITE command
is an 8 bit field, the maximum value that can be encoded is 255.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Since the argument num_blocks - i is passed as the LBA argument
to COMPAREANDWRITE(), avoid that a negative number is passed.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Confirm that data is consistent across paths when using the atomic
COMPARE AND WRITE operation.
This should be extended in future to issue the requests simultaneously
across both paths, in an attempt to trigger a read/write race.
Signed-off-by: David Disseldorp <ddiss@suse.de>
