[dm-devel] [PATCH 1/15] block copy: initial XCOPY offload support

[Pavel Machek]

On Tue 2014-07-15 15:34:47, Mikulas Patocka wrote:
> This is Martin Petersen's xcopy patch
> (https://git.kernel.org/cgit/linux/kernel/git/mkp/linux.git/commit/?h=xcopy&id=0bdeed274e16b3038a851552188512071974eea8)
> with some bug fixes, ported to the current kernel.
> 
> This patch makes it possible to use the SCSI XCOPY command.
> 
> We create a bio that has REQ_COPY flag in bi_rw and a bi_copy structure
> that defines the source device. The target device is defined in the
> bi_bdev and bi_iter.bi_sector.
> 
> There is a new BLKCOPY ioctl that makes it possible to use XCOPY from
> userspace. The ioctl argument is a pointer to an array of four uint64_t
> values.

But it is there only for block devices, right?

Is there plan to enable tools such as /bin/cp to use XCOPY?

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html