On 21.09.22 10:23, Stefan Haberland wrote:

Am 21.09.22 um 09:07 schrieb Johannes Thumshirn:

quoted

On 20.09.22 21:26, Stefan Haberland wrote:

quoted

Hi Jens,

please apply the following patchset to for-next.
It adds basic support for a harwdare based copy relation to the DASD
device driver.

Hi Stefan,

How's the relation of this patchset to the current efforts of getting a common
copy offload API (NVMe Simple Copy and SCSI XCOPY) into the block-layer?


Thanks,
	Johannes

Hi Johannes,

there is no relation to this efforts.
My patchset basically aims to add some support of IBMs 
Peer-to-Peer-Remote-Copy (PPRC) hardware feature to the DASD device driver.
PPRC is a protocol that might be used without any OS interaction on a 
storage server level.
This patchset allows the driver to recognize such devices correctly and 
allows an user to make a copy relation known to the driver.
In this case Linux is only an observer/user of the copy relation which 
is set up by an external entity.

Thanks for the clarification.