Re: [PATCH 2.6] vlan ioctl propagation (rev.2)

[Glen Turner <glen.turner@xxxxxxxxxxxxx>]

bert hubert wrote:

> On Fri, Aug 06, 2004 at 02:39:28PM -0700, Stephen Hemminger wrote:
>
> > Here is a redo of the patch to propagate ethtool and mii ioctl's
> > on vlan's to the underlying real device.  This time the request
> > is copied to a new buffer, to avoid the colon name rewrite issues.
>
> Is this really what we want? We also don't make virtual IPs appear as real
> interfaces anymore. Virtual devices are just that - virtual.
Hi Bert,

Please don't be so absolute. For example, if the virtual device "link" status
doesn't reflect that of the real device then routing software needs to parse
the virtual->real device mappings (a parsing for which Linux provides only
limited support).

Worse still, we now need to special-case virtual interfaces in application
code:
   while (virtual_interface(interface_name)) {
     virtual_to_real(interface_name, &interface_name);
   }

This is the sort of nasty detail than operating systems are meant to abstract
away from application code.

Thanks,
Glen