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Re: [Qemu-devel] [PATCH 4/7] virtio-blk: use aliases instead of duplicat
From: |
Andreas Färber |
Subject: |
Re: [Qemu-devel] [PATCH 4/7] virtio-blk: use aliases instead of duplicate qdev properties |
Date: |
Thu, 22 May 2014 12:18:10 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 |
Am 22.05.2014 00:04, schrieb Paolo Bonzini:
> Il 21/05/2014 22:22, Stefan Hajnoczi ha scritto:
>> virtio-blk-pci, virtio-blk-s390, and virtio-blk-ccw all duplicate the
>> qdev properties of their VirtIOBlock child. This approach does not work
>> well with string or pointer properties since we must be careful about
>> leaking or double-freeing them.
>>
>> Use the QOM alias property to forward property accesses to the
>> VirtIOBlock child. This way no duplication is necessary.
>>
>> Remember to stop calling virtio_blk_set_conf() so that we don't clobber
>> the values already set on the VirtIOBlock instance.
>
> Which properties are _not_ being added? This is probably needed for all
> other virtio devices so a generic solution would be nice.
"type", "realized" and the child<> property for VirtIODevice come to
mind, possibly one or two more.
If we follow a generic scheme, we could add an .instance_post_init hook
for VirtIOPCIProxy iterating over all properties and blacklisting some.
Regards,
Andreas
--
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg
- Re: [Qemu-devel] [PATCH 1/7] qom: add object_property_add_alias(), (continued)
Re: [Qemu-devel] [PATCH 1/7] qom: add object_property_add_alias(), Igor Mammedov, 2014/05/22
[Qemu-devel] [PATCH 3/7] virtio-blk: move x-data-plane qdev property to virtio-blk.h, Stefan Hajnoczi, 2014/05/21
[Qemu-devel] [PATCH 4/7] virtio-blk: use aliases instead of duplicate qdev properties, Stefan Hajnoczi, 2014/05/21
[Qemu-devel] [PATCH 6/7] virtio: fix virtio-blk child refcount in transports, Stefan Hajnoczi, 2014/05/21
[Qemu-devel] [PATCH 5/7] virtio-blk: drop virtio_blk_set_conf(), Stefan Hajnoczi, 2014/05/21
[Qemu-devel] [PATCH 7/7] virtio-blk: move qdev properties into virtio-blk.c, Stefan Hajnoczi, 2014/05/21