Re: [PATCH net-next] net: bridge: add per-port group_fwd_mask with less restrictions

On 29/09/17 18:14, Stephen Hemminger wrote:

On Wed, 27 Sep 2017 16:12:44 +0300
Nikolay Aleksandrov [off-list ref] wrote:

quoted

We need to be able to transparently forward most link-local frames via
tunnels (e.g. vxlan, qinq). Currently the bridge's group_fwd_mask has a
mask which restricts the forwarding of STP and LACP, but we need to be able
to forward these over tunnels and control that forwarding on a per-port
basis thus add a new per-port group_fwd_mask option which only disallows
mac pause frames to be forwarded (they're always dropped anyway).
The patch does not change the current default situation - all of the others
are still restricted unless configured for forwarding.
We have successfully tested this patch with LACP and STP forwarding over
VxLAN and qinq tunnels.

Signed-off-by: Nikolay Aleksandrov <redacted>

LACP is fine, but STP must not be forwarded if STP in user or kernel
mode is enabled.

Please update this patch or revert it.

The default has not changed, STP is still _not_ forwarded. It can be only if explicitly
requested by the user and that means the port might be participating in STP but not
the bridge's STP, that is explicitly forward all STP frames from that port.
I don't think we have to change anything.