Re: [Qemu-devel] [PATCH 09/13] block: Add 'runtime_opts' and 'mutable_opts' fields to BlockDriver

[Kevin Wolf <kwolf@redhat.com>]

Am 01.03.2019 um 13:42 hat Alberto Garcia geschrieben:
> On Fri 01 Mar 2019 01:36:08 PM CET, Kevin Wolf wrote:
> > Am 01.03.2019 um 13:12 hat Alberto Garcia geschrieben:
> >> On Tue 12 Feb 2019 07:02:31 PM CET, Kevin Wolf wrote:
> >> >> diff --git a/include/block/block_int.h b/include/block/block_int.h
> >> >> index fd0e88d17a..e680dda86b 100644
> >> >> --- a/include/block/block_int.h
> >> >> +++ b/include/block/block_int.h
> >> >> @@ -345,6 +345,13 @@ struct BlockDriver {
> >> >>  
> >> >>      /* List of options for creating images, terminated by name == NULL */
> >> >>      QemuOptsList *create_opts;
> >> >> +    /* Runtime options for a block device, terminated by name == NULL */
> >> >> +    QemuOptsList *runtime_opts;
> >> >
> >> > I'm not sure if using a QemuOptsList here is a good idea. Currently,
> >> > we use QemuOptsLists for most options, but there are some drivers that
> >> > use it only for part of their options, or not at all, using direct
> >> > QDict accesses or QAPI objects for the rest.
> >> 
> >> My intention was to avoid having two separate lists with the runtime
> >> options of a driver. For this feature we really need that list to
> >> contain all options, otherwise there's no way to know whether a missing
> >> option is really missing or if it doesn't exist in the first place.
> >
> > Yes, I understand your intention and the requirement. My point is just
> > that the existing QemuOptsLists are often _not_ complete, so they
> > can't fulfill the requirement.
> 
> Perhaps a new data structure with a list of runtime options and whether
> they can be resetted to their default value or not.

Basically just an array that contains names and bools, right? I think
that would work.

Kevin