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Re: [PATCH v1 1/7] xen-block: Do not write frontend nodes
From: |
Andrew Cooper |
Subject: |
Re: [PATCH v1 1/7] xen-block: Do not write frontend nodes |
Date: |
Sat, 11 Nov 2023 21:51:22 +0000 |
User-agent: |
Mozilla Thunderbird |
On 11/11/2023 8:18 pm, David Woodhouse wrote:
> On 11 November 2023 08:43:40 GMT-05:00, Andrew Cooper
> <andrew.cooper3@citrix.com> wrote:
>> Furthermore, the control domain doesn't always have the domid of 0.
>>
>> If qemu wants/needs to make changes like this, the control domain has to
>> arrange for qemu's domain to have appropriate permissions on the nodes.
> Right. And that's simple enough: if you are running QEMU in a domain which
> doesn't have permission to create the backend directory and/or the frontend
> nodes, don't ask it to *create* devices. In that case it is only able to
> connect as the backend for devices which were created *for* it by the
> toolstack.
>
> The criterion used in this patch series should be "did QEMU create this
> device, or discover it".
>
Yeah, that sounds like the right approach.
~Andrew
Re: [PATCH v1 1/7] xen-block: Do not write frontend nodes, Paul Durrant, 2023/11/12