Linux Virtualization - Oct 2010 - VHOST_NET_SET_BACKEND

Hi  All,


       I dont know how to put this question, but bear with me.   My
query is how to invoke the ioctl request "VHOST_NET_SET_BACKEND"  or
how to set the backend, and when ?


With Anticipation,
Devi.

On Wed, Oct 6, 2010 at 7:43 AM, devi thapa <devi.thapa at gmail.com>
wrote:
> ? ? ? I dont know how to put this question, but bear with me. ? My
> query is how to invoke the ioctl request "VHOST_NET_SET_BACKEND"
?or
> how to set the backend, and when ?
Look at the QEMU side vhost-net code:
http://git.qemu.org/qemu.git/tree/hw/vhost_net.c#n145

Where does the backend fd come from?  It's the host network device
file descriptor that gets fetched by vhost_net_get_fd().  Currently it
must be a tap device file descriptor.

Stefan