tipc: add 128-bit node identifier

We add a 128-bit node identity, as an alternative to the currently used
32-bit node address.

For the sake of compatibility and to minimize message header changes
we retain the existing 32-bit address field. When not set explicitly by
the user, this field will be filled with a hash value generated from the
much longer node identity, and be used as a shorthand value for the
latter.

We permit either the address or the identity to be set by configuration,
but not both, so when the address value is set by a legacy user the
corresponding 128-bit node identity is generated based on the that value.

Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/net/tipc/core.h b/net/tipc/core.h
index bd2b112680a4..eabad41cc832 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -72,13 +72,17 @@ struct tipc_monitor;
 #define NODE_HTABLE_SIZE       512
 #define MAX_BEARERS	         3
 #define TIPC_DEF_MON_THRESHOLD  32
+#define NODE_ID_LEN             16
+#define NODE_ID_STR_LEN        (NODE_ID_LEN * 2 + 1)
 
 extern unsigned int tipc_net_id __read_mostly;
 extern int sysctl_tipc_rmem[3] __read_mostly;
 extern int sysctl_tipc_named_timeout __read_mostly;
 
 struct tipc_net {
-	u32 own_addr;
+	u8  node_id[NODE_ID_LEN];
+	u32 node_addr;
+	char node_id_string[NODE_ID_STR_LEN];
 	int net_id;
 	int random;
 	bool legacy_addr_format;