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 | 96 ++++++++++++-
block/io.c | 97 +++++++++++++
block/iscsi.c | 314 ++++++++++++++++++++++++++++++++++++-----
block/qcow2.c | 226 +++++++++++++++++++++++++----
block/raw-format.c | 96 +++++++++----
include/block/block.h | 32 +++++
include/block/block_int.h | 38 +++++
include/block/raw-aio.h | 10 +-
include/scsi/constants.h | 5 +
include/sysemu/block-backend.h | 4 +
qemu-img.c | 50 ++++++-
12 files changed, 887 insertions(+), 99 deletions(-)
--
2.14.3
