Re: [Qemu-devel] [Qemu-block] [PATCH v9 00/10] qemu-img convert with copy offloading

[Stefan Hajnoczi <stefanha@gmail.com>]

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On Fri, Jun 01, 2018 at 05:26:38PM +0800, Fam Zheng wrote:
> v9: Don't break older libiscsi. [patchew]
> 
> v8: Fix compiling against new glibc and libiscsi on Fedora 28 where v7 had
>     conflict definitions. [Stefan, myself]
>     - Add HAVE_COPY_FILE_RANGE in configure.
>     - Drop IDENT_DESCR_TGT_DESCR from scsi constants header.
> 
> v7: Fix qcow2.
> 
> v6: Pick up rev-by from Stefan and Eric.
>     Tweak patch 2 commit message.
> 
> v5: - Fix raw offset/bytes check for read. [Eric]
>     - Fix qcow2_handle_l2meta. [Stefan]
>     - Add coroutine_fn whereever appropriate. [Stefan]
> 
> v4: - Fix raw offset and size. [Eric]
>     - iscsi: Drop unnecessary return values and variables in favor of
>       constants. [Stefan]
>     - qcow2: Handle small backing case. [Stefan]
>     - file-posix: Translate ENOSYS to ENOTSUP. [Stefan]
>     - API documentation and commit message. [Stefan]
>     - Add rev-by to patches 3, 5 - 10. [Stefan, Eric]
> 
> This series introduces block layer API for copy offloading and makes use of it
> in qemu-img convert.
> 
> For now we implemented the operation in local file protocol with
> copy_file_range(2).  Besides that it's possible to add similar to iscsi, nfs
> and potentially more.
> 
> As far as its usage goes, in addition to qemu-img convert, we can emulate
> offloading in scsi-disk (handle EXTENDED COPY command), and use the API in
> block jobs too.
> 
> Fam Zheng (10):
>   block: Introduce API for copy offloading
>   raw: Check byte range uniformly
>   raw: Implement copy offloading
>   qcow2: Implement copy offloading
>   file-posix: Implement bdrv_co_copy_range
>   iscsi: Query and save device designator when opening
>   iscsi: Create and use iscsi_co_wait_for_task
>   iscsi: Implement copy offloading
>   block-backend: Add blk_co_copy_range
>   qemu-img: Convert with copy offloading
> 
>  block/block-backend.c          |  18 ++
>  block/file-posix.c             |  98 +++++++++-
>  block/io.c                     |  97 ++++++++++
>  block/iscsi.c                  | 314 +++++++++++++++++++++++++++++----
>  block/qcow2.c                  | 229 ++++++++++++++++++++----
>  block/raw-format.c             |  96 +++++++---
>  configure                      |  17 ++
>  include/block/block.h          |  32 ++++
>  include/block/block_int.h      |  38 ++++
>  include/block/raw-aio.h        |  10 +-
>  include/scsi/constants.h       |   4 +
>  include/sysemu/block-backend.h |   4 +
>  qemu-img.c                     |  50 +++++-
>  13 files changed, 908 insertions(+), 99 deletions(-)
> 
> -- 
> 2.17.0
> 
> 

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan

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