diff options
| author | Jon Paul Maloy <jon.maloy@ericsson.com> | 2017-01-18 13:50:53 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-01-20 12:10:17 -0500 |
| commit | 01fd12bb189a0772301dd37e9b31e53761269a1b (patch) | |
| tree | 6e865477ba51e3dd0216c00362e7c3421de1e57b /include | |
| parent | a853e4c6d0843729e1f25a7a7beff168e1dd7420 (diff) | |
tipc: make replicast a user selectable option
If the bearer carrying multicast messages supports broadcast, those
messages will be sent to all cluster nodes, irrespective of whether
these nodes host any actual destinations socket or not. This is clearly
wasteful if the cluster is large and there are only a few real
destinations for the message being sent.
In this commit we extend the eligibility of the newly introduced
"replicast" transmit option. We now make it possible for a user to
select which method he wants to be used, either as a mandatory setting
via setsockopt(), or as a relative setting where we let the broadcast
layer decide which method to use based on the ratio between cluster
size and the message's actual number of destination nodes.
In the latter case, a sending socket must stick to a previously
selected method until it enters an idle period of at least 5 seconds.
This eliminates the risk of message reordering caused by method change,
i.e., when changes to cluster size or number of destinations would
otherwise mandate a new method to be used.
Reviewed-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/tipc.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/uapi/linux/tipc.h b/include/uapi/linux/tipc.h index bf049e8fe31b..5351b08c897a 100644 --- a/include/uapi/linux/tipc.h +++ b/include/uapi/linux/tipc.h @@ -1,7 +1,7 @@ /* * include/uapi/linux/tipc.h: Header for TIPC socket interface * - * Copyright (c) 2003-2006, Ericsson AB + * Copyright (c) 2003-2006, 2015-2016 Ericsson AB * Copyright (c) 2005, 2010-2011, Wind River Systems * All rights reserved. * @@ -220,7 +220,7 @@ struct sockaddr_tipc { #define TIPC_DESTNAME 3 /* destination name */ /* - * TIPC-specific socket option values + * TIPC-specific socket option names */ #define TIPC_IMPORTANCE 127 /* Default: TIPC_LOW_IMPORTANCE */ @@ -229,6 +229,8 @@ struct sockaddr_tipc { #define TIPC_CONN_TIMEOUT 130 /* Default: 8000 (ms) */ #define TIPC_NODE_RECVQ_DEPTH 131 /* Default: none (read only) */ #define TIPC_SOCK_RECVQ_DEPTH 132 /* Default: none (read only) */ +#define TIPC_MCAST_BROADCAST 133 /* Default: TIPC selects. No arg */ +#define TIPC_MCAST_REPLICAST 134 /* Default: TIPC selects. No arg */ /* * Maximum sizes of TIPC bearer-related names (including terminating NULL) |