bridge: uapi: mrp: Extend MRP attributes to get the status

Add MRP attribute IFLA_BRIDGE_MRP_INFO to allow the userspace to get the
current state of the MRP instances. This is a nested attribute that
contains other attributes like, ring id, index of primary and secondary
port, priority, ring state, ring role.

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>

include/uapi/linux/if_bridge.h

@@ -166,6 +166,7 @@ enum {
 	IFLA_BRIDGE_MRP_RING_STATE,
 	IFLA_BRIDGE_MRP_RING_ROLE,
 	IFLA_BRIDGE_MRP_START_TEST,
+	IFLA_BRIDGE_MRP_INFO,
 	__IFLA_BRIDGE_MRP_MAX,
 };
 
@@ -228,6 +229,22 @@ enum {
 
 #define IFLA_BRIDGE_MRP_START_TEST_MAX (__IFLA_BRIDGE_MRP_START_TEST_MAX - 1)
 
+enum {
+	IFLA_BRIDGE_MRP_INFO_UNSPEC,
+	IFLA_BRIDGE_MRP_INFO_RING_ID,
+	IFLA_BRIDGE_MRP_INFO_P_IFINDEX,
+	IFLA_BRIDGE_MRP_INFO_S_IFINDEX,
+	IFLA_BRIDGE_MRP_INFO_PRIO,
+	IFLA_BRIDGE_MRP_INFO_RING_STATE,
+	IFLA_BRIDGE_MRP_INFO_RING_ROLE,
+	IFLA_BRIDGE_MRP_INFO_TEST_INTERVAL,
+	IFLA_BRIDGE_MRP_INFO_TEST_MAX_MISS,
+	IFLA_BRIDGE_MRP_INFO_TEST_MONITOR,
+	__IFLA_BRIDGE_MRP_INFO_MAX,
+};
+
+#define IFLA_BRIDGE_MRP_INFO_MAX (__IFLA_BRIDGE_MRP_INFO_MAX - 1)
+
 struct br_mrp_instance {
 	__u32 ring_id;
 	__u32 p_ifindex;