net: dsa: add support for BRIDGE_MROUTER attribute

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This patch adds support for enabling or disabling the flooding of
unknown multicast traffic on the CPU ports, depending on the value
of the switchdev SWITCHDEV_ATTR_ID_BRIDGE_MROUTER attribute.

The current behavior is kept unchanged but a user can now prevent
the CPU conduit to be flooded with a lot of unregistered traffic that
the network stack needs to filter in software with e.g.:

    echo 0 > /sys/class/net/br0/multicast_router

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Vivien Didelot 2019-07-08 23:31:13 -04:00 • committed by David S. Miller

parent fbc697796e

commit 08cc83cc7f

3 changed files with 17 additions and 0 deletions

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2

net/dsa/dsa_priv.h

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12

net/dsa/port.c

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3

net/dsa/slave.c

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