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Re: [Qemu-devel] [PATCH 0/4] qom: link property fixes


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 0/4] qom: link property fixes
Date: Wed, 05 Mar 2014 10:31:27 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0

Il 05/03/2014 10:24, Andreas Färber ha scritto:
Am 05.03.2014 09:14, schrieb Paolo Bonzini:
Il 04/03/2014 22:45, Stefan Hajnoczi ha scritto:
There are two problems with QOM link properties:

1. There are refcount leaks in many object_property_add_link() callers.
2. There is no way to prevent link properties from being set after a
device is
   realized.

This patch series fixes these issues by extending the
object_property_add_link() function.

Thanks for looking into this!  Just two (mostly) cosmetic comments:

1) in patch 2 we could use a flags argument instead of a "bool".  This
is more easily extensible and self-documenting.

I wonder if we can do this more cleverly: The two ways a link<> property
can get set that I can think of are either a) assigning the field a new
value in C code or b) using object_property_set_link() with a textual
path. Can't the latter simply save an unref flag within the property's
opaque when used?

Sounds too magic...

Paolo




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