fyi - in the v3 of the lpfc 10.5.0.0 patches I just posted, I pulled
the patch. We will see what to do with it. We may come back with a set
of generic midlayer patches.
-- james s
On 4/5/2015 12:06 PM, Christoph Hellwig wrote:
On Fri, Apr 03, 2015 at 05:13:00PM -0400, James Smart wrote:
Implement support for wire-only DIF devices
This patch adds the ability to support auto-enablement of wire-only DIF
(DIF is generated on TX to target, stripped on RX; OS unaware DIF in use)
for a select set of devices. Currently, there is only 1 device vendor
supported: 3PARdata. When the feature is enabled, Inquiry commands are
trapped, the vendor matched, and DIF enablement checked. In 3Par's case,
there's a vendor specific check to see if the LUN supports DIF.
If supported, DIF will be enabled on a per-lun basis. The driver will
trap READS/WRITEs from the OS, check for LUN DIF enablement, and if set,
turns on write-only DIF.
NAK. We do support proper DIF, and anyone who wants it should enable
the real thing.
And even if we would want to support a hack like this we'd do it
genericly an not in a driver.
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