On Thu, May 05, 2016 at 12:18:52PM +0000, Kavanagh, Mark B wrote:
> >+ if ((ret = netdev_dpdk_lookup_vhost_id(dev)) >= 0) {
> >+ ifindex = VHOST_ID_TO_IFINDEX(ret);
> >+ } else {
> >+ ifindex = 0;
>
> I don't think that 0 is an appropriate value to return here, since it
> overlaps with a kernel interface's index.
0 is never a valid ifindex value, at least on a POSIX system, since it
is the error return value from if_nametoindex(), see:
http://pubs.opengroup.org/onlinepubs/009695399/functions/if_nametoindex.html
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