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Re: [Qemu-devel] [PATCH 4/7] qdev: Introduce DEFINE_PROP_LINK
From: |
Fam Zheng |
Subject: |
Re: [Qemu-devel] [PATCH 4/7] qdev: Introduce DEFINE_PROP_LINK |
Date: |
Wed, 28 Jun 2017 22:02:19 +0800 |
User-agent: |
Mutt/1.8.0 (2017-02-23) |
On Wed, 06/28 15:38, Paolo Bonzini wrote:
>
>
> On 28/06/2017 14:48, Fam Zheng wrote:
> >
> > It's implemented by creating a wrapper property that basically forwards
> > operations to a QOM "link-FOO" property, which handles the check
> > callback and flags. The feature that is missing from QOM is the dynamic
> > child pointer which is done in the added code with the usual "offset"
> > approach.
>
> Would it be possible to add a ".create" field to PropertyInfo? Then
> there's no need to introduce the wrapper.
QOM setter/getter want a LinkProperty opaque pointer, but qdev uses a Property
pointer. I don't see a way to adapt that with .create(). Can you elaborate?
>
> Also, I think _check and _flags can be always
> qdev_prop_allow_set_link_before_realize and
> OBJ_PROP_LINK_UNREF_ON_RELEASE for DEFINE_PROP_LINK.
A quick grep gave me some object_property_add_link() callers using different
parameters, but I don't know if they should use DEFINE_PROP_LINK.
Fam
[Qemu-devel] [PATCH 5/7] virtio-blk: Use DEFINE_PROP_LINK, Fam Zheng, 2017/06/28
[Qemu-devel] [PATCH 6/7] virtio-scsi: Use DEFINE_PROP_LINK, Fam Zheng, 2017/06/28
[Qemu-devel] [PATCH 7/7] virtio-rng: Use DEFINE_PROP_LINK, Fam Zheng, 2017/06/28