On 5/28/2019 3:50 PM, Vladimir Oltean wrote:
> Tools like tcpdump need to be able to decode the significance of fake
> VLAN headers that DSA uses to separate switch ports.
>
> But currently these have no global significance - they are simply an
> ordered list of DSA_MAX_SWITCHES x DSA_MAX_PORTS numbers ending at 4095.
>
> The reason why this is submitted as a fix is that the existing mapping
> of VIDs should not enter into a stable kernel, so we can pretend that
> only the new format exists. This way tcpdump won't need to try to make
> something out of the VLAN tags on 5.2 kernels.
>
> Fixes: f9bbe4477c30 ("net: dsa: Optional VLAN-based port separation for
> switches without tagging")
> Signed-off-by: Vladimir Oltean <olte...@gmail.com>
Reviewed-by: Florian Fainelli <f.faine...@gmail.com>
This looks a lot nicer actually, and kudos for documenting the format.
--
Florian
