bridge: mrp: Add br_mrp_in_port_open function

This function notifies the userspace when the node lost the continuity
of MRP_InTest frames.
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_mrp_netlink.c

@@ -389,3 +389,25 @@ int br_mrp_ring_port_open(struct net_device *dev, u8 loc)
 out:
 	return err;
 }
+
+int br_mrp_in_port_open(struct net_device *dev, u8 loc)
+{
+	struct net_bridge_port *p;
+	int err = 0;
+
+	p = br_port_get_rcu(dev);
+	if (!p) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	if (loc)
+		p->flags |= BR_MRP_LOST_IN_CONT;
+	else
+		p->flags &= ~BR_MRP_LOST_IN_CONT;
+
+	br_ifinfo_notify(RTM_NEWLINK, NULL, p);
+
+out:
+	return err;
+}

net/bridge/br_private_mrp.h

@@ -75,5 +75,6 @@ int br_mrp_port_switchdev_set_role(struct net_bridge_port *p,
 
 /* br_mrp_netlink.c  */
 int br_mrp_ring_port_open(struct net_device *dev, u8 loc);
+int br_mrp_in_port_open(struct net_device *dev, u8 loc);
 
 #endif /* _BR_PRIVATE_MRP_H */