Re: [PATCH v3 0/3] vduse: add support for networking devices

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On 8/11/23 00:00, Jakub Kicinski wrote:
On Thu, 10 Aug 2023 17:42:11 -0400 Michael S. Tsirkin wrote:
Directly into the stack? I thought VDUSE is vDPA in user space,
meaning to get to the kernel the packet has to first go thru
a virtio-net instance.

yes. is that a sufficient filter in your opinion?

Yes, the ability to create the device feels stronger than CAP_NET_RAW,
and a bit tangential to CAP_NET_ADMIN. But I don't have much practical
experience with virt so no strong opinion, perhaps it does make sense
for someone's deployment? Dunno..

I'm not sure CAP_NET_ADMIN should be required for creating the VDUSE
devices, as the device could be attached to vhost-vDPA and so not
visible to the Kernel networking stack.

However, CAP_NET_ADMIN should be required to attach the VDUSE device to virtio-vdpa/virtio-net.

Does that make sense?


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