tipc: add node get/dump to new netlink api

Add TIPC_NL_NODE_GET to the new tipc netlink API.

This command can dump the address and node status of all nodes in the
tipc cluster.

Netlink logical layout of returned node/address data:
-> node
    -> address
    -> up flag

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/uapi/linux/tipc_netlink.h b/include/uapi/linux/tipc_netlink.h
index 43beef2..08a7933 100644
--- a/include/uapi/linux/tipc_netlink.h
+++ b/include/uapi/linux/tipc_netlink.h
@@ -52,6 +52,7 @@
 	TIPC_NL_LINK_RESET_STATS,
 	TIPC_NL_MEDIA_GET,
 	TIPC_NL_MEDIA_SET,
+	TIPC_NL_NODE_GET,
 
 	__TIPC_NL_CMD_MAX,
 	TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1
@@ -65,6 +66,7 @@
 	TIPC_NLA_PUBL,			/* nest */
 	TIPC_NLA_LINK,			/* nest */
 	TIPC_NLA_MEDIA,			/* nest */
+	TIPC_NLA_NODE,			/* nest */
 
 	__TIPC_NLA_MAX,
 	TIPC_NLA_MAX = __TIPC_NLA_MAX - 1
@@ -121,6 +123,16 @@
 	TIPC_NLA_MEDIA_MAX = __TIPC_NLA_MEDIA_MAX - 1
 };
 
+/* Node info */
+enum {
+	TIPC_NLA_NODE_UNSPEC,
+	TIPC_NLA_NODE_ADDR,		/* u32 */
+	TIPC_NLA_NODE_UP,		/* flag */
+
+	__TIPC_NLA_NODE_MAX,
+	TIPC_NLA_NODE_MAX = __TIPC_NLA_NODE_MAX - 1
+};
+
 /* Publication info */
 enum {
 	TIPC_NLA_PUBL_UNSPEC,