netdev - [PATCH RFC net-next 12/13] net: dsa: treat switchdev notifications for multicast router connected to port

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Date:   Fri, 22 May 2020 00:10:35 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com,
        davem@...emloft.net
Cc:     jiri@...nulli.us, idosch@...sch.org, kuba@...nel.org,
        ivecera@...hat.com, netdev@...r.kernel.org,
        horatiu.vultur@...rochip.com, allan.nielsen@...rochip.com,
        nikolay@...ulusnetworks.com, roopa@...ulusnetworks.com
Subject: [PATCH RFC net-next 12/13] net: dsa: treat switchdev notifications for multicast router connected to port

From: Vladimir Oltean <vladimir.oltean@....com>

Similar to the "bridge is multicast router" case, unknown multicast
should be flooded by this bridge to the ports where a multicast router
is connected.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 net/dsa/slave.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 2743d689f6b1..c023f1120736 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -467,7 +467,12 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
 	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
 		ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
 		break;
+	case SWITCHDEV_ATTR_ID_PORT_MROUTER:
+		/* A multicast router is connected to this external port */
+		ret = dsa_port_mrouter(dp, attr->u.mrouter, trans);
+		break;
 	case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
+		/* The local bridge is a multicast router */
 		ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
 		break;
 	default:
-- 
2.25.1