On 9/11/2014 3:07 AM, Martin K. Petersen wrote:
"Sagi" == Sagi Grimberg <sa...@dev.mellanox.co.il> writes:
[Back from vacation]
Hey Martin,
+ [SCSI_PROT_WRITE_PASS] = SCSI_PROT_TRANSFER_PI |
+ SCSI_PROT_GUARD_CHECK |
+ SCSI_PROT_REF_CHECK |
+ SCSI_PROT_REF_INCREMENT |
+ SCSI_PROT_IP_CHECKSUM,
Sagi> A bit strange to me that you put REF_CHECK & REF_INCREMENT flag
Sagi> depending on the prot_op while it really depends on the prot_type.
It doesn't just depend on the prot_type. You need to be able to tell the
HBA to increment/test the ref tag even for a Type 0 device.
That's still a dependence on prot_type (type 0...). Notice that you
set SCSI_PROT_REF_INCREMENT in every op index (except SCSI_PROT_NORMAL)
so my point is that it's strange to see this association.
P.S.
Now drivers can stop understanding prot_type to set DIF operations...
so once drivers stop referencing it we can remove it from scsi_cmnd.
Sagi.
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