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Re: [PATCH v5 3/4] hmp: Use QMP query-netdev in hmp_info_network
From: |
Jason Wang |
Subject: |
Re: [PATCH v5 3/4] hmp: Use QMP query-netdev in hmp_info_network |
Date: |
Wed, 16 Dec 2020 00:58:02 -0500 (EST) |
----- Original Message -----
> Jason Wang <jasowang@redhat.com> writes:
>
> [...]
> > One more stupid question, instead of generating the string via hard
> > codes, is there any method (dict?) to iterate all the key/values
> > automatically?
>
> QAPI visitors.
>
> The lazy way: use the QObject output visitor to convert the QAPI type
> (here: NetdevInfo) to QObject, then qobject_to_json() to convert to
> JSON text.
>
> If you don't want JSON, replace qobject_to_json(). Perhaps you can
> create something that's generally useful for HMP, not just "info
> network". I'd pick keyval_parse() syntax.
>
> The detour through QObject creates and destroys a rather fat temporary
> data structure. Tolerable when the amount of data is small. An output
> visitor that directly creates the string is more efficient. Takes a bit
> more code, though. I intend to post one for JSON, to reduce QMP's
> malloc gluttony.
>
Thanks a lot for the answer.
Alexey, let's try what Markus suggested here.