Re: [PATCH net-next] sysfs: add entry to indicate network interfaceswith random MAC address

[Harald Hoyer]

On 07/21/2010 08:34 AM, David Miller wrote:
> From: Harald Hoyer<harald@xxxxxxxxxx>
> Date: Wed, 21 Jul 2010 08:26:27 +0200
>
> > On 07/20/2010 11:20 PM, David Miller wrote:
> > > From: Stephen Hemminger<shemminger@xxxxxxxxxx>
> > > Date: Tue, 20 Jul 2010 14:18:16 -0700
> > >
> > > > No one mentioned that the first octet of an Ethernet address already
> > > > indicates "software generated" Ethernet address. Per the standard,
> > > > if bit 1 is set it means address is locally assigned.
> > > >
> > > > static inline bool is_locally_assigned_ether(const u8 *addr)
> > > > {
> > > > 	return (addr[0]&   0x2) != 0;
> > > > }
> > >
> > > W00t!
> > >
> > > Indeed, can udev just use that?  :-)
> >
> > It already does:
> > see /lib/udev/rules.d/75-persistent-net-generator.rules
>
> So... why doesn't this work?

It works.. but the information, that the MAC is randomly generated would be 
valuable. So, for the non-random locally assigned MAC (with bit 1), we could 
easily make persistent rules based on the MAC, instead of completely ignoring 
them, like we do currently.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/