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
