Re: [PATCH v3 3/7] qapi: block-job-change: make copy-mode parameter optional
Am 02.10.2024 um 16:06 hat Vladimir Sementsov-Ogievskiy geschrieben:
We are going to add more parameters to change. We want to make
possible
to change only one or any subset of available options. So all the
options should be optional.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov(a)yandex-team.ru>
Acked-by: Markus Armbruster <armbru(a)redhat.com>
This is different from blockdev-reopen, which requires repeating all
options (and can therefore reuse the type from blockdev-add). One of the
reasons why we made it like that is that we had some options for which
"option absent" was a meaningful value in itself, so it would have
become ambiguous if an absent option in blockdev-reopen should mean
"leave the existing value unchanged" or "unset the option".
Are we confident that this will never happen with job options? In case
of doubt, I would go for consistency with blockdev-reopen.
Either way, it would be good to document the reasoning for whatever
option we choose in the commit message.
Kevin