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Re: [Qemu-devel] [PATCH 0/4] net-bridge: rootless bridge support for qem

From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH 0/4] net-bridge: rootless bridge support for qemu
Date: Thu, 05 Nov 2009 18:20:34 +0200
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20091014 Fedora/3.0-2.8.b4.fc11 Thunderbird/3.0b4

On 11/05/2009 05:59 PM, Anthony Liguori wrote:
Avi Kivity wrote:
On 11/05/2009 05:11 PM, Daniel P. Berrange wrote:
The main problem is that we've never really used the 'session' instances,
since networking configs are rather limited to pretty much just SLIRP
and people expect full bridging.  I think this patch series you've
done is invaluable and will let us finally make full use of the libvirt
'session' instances for desktop virt, running everything unprivileged.

What's to stop you from using the same idea to get a tap fd for the unprivileged libvirtd instance?

Why limit this to just libvirt based management tools? The helper has to live somewhere, why not have it live in qemu?

Because anything special the management tools wants done (as simple as remembering the interface name so it can collect statistics and associate them with the guest) will render the helper unusable. The helper is pure glue so it will be very hard to generalize.

libvirt can still call it and pass the fd to qemu if it really wants to.

Until it needs a new feature, then it goes back to -net tap.

error compiling committee.c: too many arguments to function

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