[PATCH RFC net-next 05/10] net: dsa: Add support for PORT_MROUTER attribute

[Joseph Huang <Joseph.Huang@xxxxxxxxxx>]

Add support for delivering SWITCHDEV_ATTR_ID_PORT_MROUTER event to DSA
subsystem. This is essentially 08cc83c ("net: dsa: add support for
BRIDGE_MROUTER attribute") repurposed for PORT_MROUTER.

Signed-off-by: Joseph Huang <Joseph.Huang@xxxxxxxxxx>
---
 include/net/dsa.h |  2 ++
 net/dsa/port.c    | 11 +++++++++++
 net/dsa/port.h    |  2 ++
 net/dsa/user.c    |  6 ++++++
 4 files changed, 21 insertions(+)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 7c0da9effe4e..5dc5838caa9c 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -1037,6 +1037,8 @@ struct dsa_switch_ops {
 	int	(*port_bridge_flags)(struct dsa_switch *ds, int port,
 				     struct switchdev_brport_flags flags,
 				     struct netlink_ext_ack *extack);
+	int	(*port_mrouter)(struct dsa_switch *ds, int port, bool mrouter,
+				struct netlink_ext_ack *extack);
 	void	(*port_set_host_flood)(struct dsa_switch *ds, int port,
 				       bool uc, bool mc);
 
diff --git a/net/dsa/port.c b/net/dsa/port.c
index c42dac87671b..3f689cb713aa 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -948,6 +948,17 @@ int dsa_port_bridge_flags(struct dsa_port *dp,
 	return 0;
 }
 
+int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
+		     struct netlink_ext_ack *extack)
+{
+	struct dsa_switch *ds = dp->ds;
+
+	if (!ds->ops->port_mrouter)
+		return -EOPNOTSUPP;
+
+	return ds->ops->port_mrouter(ds, dp->index, mrouter, extack);
+}
+
 void dsa_port_set_host_flood(struct dsa_port *dp, bool uc, bool mc)
 {
 	struct dsa_switch *ds = dp->ds;
diff --git a/net/dsa/port.h b/net/dsa/port.h
index 6bc3291573c0..85102e1659ae 100644
--- a/net/dsa/port.h
+++ b/net/dsa/port.h
@@ -81,6 +81,8 @@ int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
 int dsa_port_bridge_flags(struct dsa_port *dp,
 			  struct switchdev_brport_flags flags,
 			  struct netlink_ext_ack *extack);
+int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
+		     struct netlink_ext_ack *extack);
 int dsa_port_vlan_add(struct dsa_port *dp,
 		      const struct switchdev_obj_port_vlan *vlan,
 		      struct netlink_ext_ack *extack);
diff --git a/net/dsa/user.c b/net/dsa/user.c
index 16d395bb1a1f..f69c4df143f7 100644
--- a/net/dsa/user.c
+++ b/net/dsa/user.c
@@ -647,6 +647,12 @@ static int dsa_user_port_attr_set(struct net_device *dev, const void *ctx,
 
 		ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, extack);
 		break;
+	case SWITCHDEV_ATTR_ID_PORT_MROUTER:
+		if (!dsa_port_offloads_bridge_port(dp, attr->orig_dev))
+			return -EOPNOTSUPP;
+
+		ret = dsa_port_mrouter(dp, attr->u.mrouter, extack);
+		break;
 	case SWITCHDEV_ATTR_ID_VLAN_MSTI:
 		if (!dsa_port_offloads_bridge_dev(dp, attr->orig_dev))
 			return -EOPNOTSUPP;
-- 
2.17.1