On Thu, Feb 14, 2019 at 02:23:56PM +0100, Linus Walleij wrote:
From: Felix Fietkau nbd@nbd.name
commit 6db6f0eae6052b70885562e1733896647ec1d807 upstream.
Implements an optional, per bridge port flag and feature to deliver multicast packets to any host on the according port via unicast individually. This is done by copying the packet per host and changing the multicast destination MAC to a unicast one accordingly.
multicast-to-unicast works on top of the multicast snooping feature of the bridge. Which means unicast copies are only delivered to hosts which are interested in it and signalized this via IGMP/MLD reports previously.
This feature is intended for interface types which have a more reliable and/or efficient way to deliver unicast packets than broadcast ones (e.g. wifi).
However, it should only be enabled on interfaces where no IGMPv2/MLDv1 report suppression takes place. This feature is disabled by default.
The initial patch and idea is from Felix Fietkau.
Signed-off-by: Felix Fietkau nbd@nbd.name [linus.luessing@c0d3.blue: various bug + style fixes, commit message] Signed-off-by: Linus Lüssing linus.luessing@c0d3.blue Reviewed-by: Nikolay Aleksandrov nikolay@cumulusnetworks.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Linus Walleij linus.walleij@linaro.org
This looks like a new feature rather than a fix, why does it need to go to -stable?
-- Thanks, Sasha