Hello, There have been discussions before on these lists on the topic of connecting a QEMU guest running a virtio_net driver, with an external userspace ethernet switch (Snabbswitch in particular). The essential requirement in this is to put the virtio backend in the external userspace process.
The preferred direction should be similar to vhost, with the main difference of the control mechanism being a unix domain socket instead of an ioctl interface, and of course placing the backend in an userspace process instead the kernel. Since we are pursuing this direction,we would like to share a more detailed description of the architecture we are working on. Any feedback is most welcome. It is available here: http://www.virtualopensystems.com/media/snabbswitch/rfc_snabbswitch_qemu.pdf Best regards, Antonios Motakis Virtual Open Systems
