[libvirt] [PATCH v3 0/5] RFC: grant KVM guests retain arbitrary capabilities
Taku Izumi
izumi.taku at jp.fujitsu.com
Wed Jan 18 07:38:37 UTC 2012
Sorry for late response.
On Fri, 13 Jan 2012 14:46:08 +0000
"Daniel P. Berrange" <berrange at redhat.com> wrote:
> On Thu, Jan 12, 2012 at 04:25:27PM +0900, Taku Izumi wrote:
> > Hi Osier-san, Daniel-san, and all,
> >
> > This patchset adds an option for KVM guests to retain arbitrary capabilities.
> > The previous versions are here:
> > http://www.redhat.com/archives/libvir-list/2011-December/msg00857.html
> > http://www.redhat.com/archives/libvir-list/2011-December/msg00950.html
>
> Can you give me a little more detail on why you need to make KVM
> keep certain capabilities.
>
> In your first message you mention that you need to have 'rawio' for
> QEMU ?
Yes.
> I am now wondering if we should do this in a different way. ie if
> there is some XML configuration parameter for the <disk> that
> indicates the need for rawio, then libvirt could automatically
> ensures that we add CAP_SYS_RAWIO when starting QEMU.
I see.
You say if a guest has the following XML configuration,
"CAP_SYS_RAWIO" capability is automatically added to it, right?
<disk type='block' device='lun'>
>
> Likewise with type=ethernet, we could probably give QEMU the
> CAP_SYS_NETADMIN capability.
>
> To me this feels nicer directly exposing capabilities in the
> XML, since these are really an internal impl detail, not a
> guest configuration thing.
>
--
Best regards,
Taku Izumi <izumi.taku at jp.fujitsu.com>
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