Hi,

This series adds a keep_data_file qemu-img create option to qcow2 that
makes it keep the given external data file for a newly created image
instead of overwriting it.

This allows to create a qcow2 image for an existing raw image using the
qemu-img create command, which previously wasn’t easily possible
(besides work-arounds using a temporary data file or qemu-img amend).

(The “proper” way of doing it without this option is to use QMP
blockdev-create.)

This new option is a pure qemu-img create (i.e. command-line) option,
not available via QMP, because it does not make any sense there.  See
patch 1 for more explanation.

(See https://issues.redhat.com/browse/RHEL-73509 for perhaps a bit more
context.)


Hanna Czenczek (4):
  qcow2: Add keep_data_file command-line option
  qcow2: Simplify size round-up in co_create_opts
  iotests/common.filter: Sort keep_data_file
  iotests/244: Add test cases for keep_data_file

 include/block/block_int-common.h |  1 +
 block/qcow2.c                    | 78 +++++++++++++++++++++++++++++---
 tests/qemu-iotests/082.out       | 18 ++++++++
 tests/qemu-iotests/244           | 71 +++++++++++++++++++++++++++++
 tests/qemu-iotests/244.out       | 53 ++++++++++++++++++++++
 tests/qemu-iotests/common.filter |  2 +-
 6 files changed, 216 insertions(+), 7 deletions(-)

-- 
2.49.0