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authorJon Maloy <jon.maloy@ericsson.com>2018-01-08 21:03:28 +0100
committerDavid S. Miller <davem@davemloft.net>2018-01-09 12:35:58 -0500
commitd12d2e12cec2d66eab6cd58f592dad9fd386b97d (patch)
tree2a127edfb12677a9ec6e995e1f8345ed9962b7d6 /net/tipc/group.h
parentc2b22bcf2e18a279afd80a8c57e936014acf3348 (diff)
downloadlinux-d12d2e12cec2d66eab6cd58f592dad9fd386b97d.tar.bz2
tipc: send out join messages as soon as new member is discovered
When a socket is joining a group, we look up in the binding table to find if there are already other members of the group present. This is used for being able to return EAGAIN instead of EHOSTUNREACH if the user proceeds directly to a send attempt. However, the information in the binding table can be used to directly set the created member in state MBR_PUBLISHED and send a JOIN message to the peer, instead of waiting for a topology PUBLISH event to do this. When there are many members in a group, the propagation time for such events can be significant, and we can save time during the join operation if we use the initial lookup result fully. In this commit, we eliminate the member state MBR_DISCOVERED which has been the result of the initial lookup, and do instead go directly to MBR_PUBLISHED, which initiates the setup. After this change, the tipc_member FSM looks as follows: +-----------+ ---->| PUBLISHED |-----------------------------------------------+ PUB- +-----------+ LEAVE/WITHRAW | LISH |JOIN | | +-------------------------------------------+ | | | LEAVE/WITHDRAW | | | | +------------+ | | | | +----------->| PENDING |---------+ | | | | |msg/maxactv +-+---+------+ LEAVE/ | | | | | | | | WITHDRAW | | | | | | +----------+ | | | | | | | |revert/maxactv| | | | | | | V V V V V | +----------+ msg +------------+ +-----------+ +-->| JOINED |------>| ACTIVE |------>| LEAVING |---> | +----------+ +--- -+------+ LEAVE/+-----------+DOWN | A A | WITHDRAW A A A EVT | | | |RECLAIM | | | | | |REMIT V | | | | | |== adv +------------+ | | | | | +---------| RECLAIMING |--------+ | | | | +-----+------+ LEAVE/ | | | | |REMIT WITHDRAW | | | | |< adv | | | |msg/ V LEAVE/ | | | |adv==ADV_IDLE+------------+ WITHDRAW | | | +-------------| REMITTED |------------+ | | +------------+ | |PUBLISH | JOIN +-----------+ LEAVE/WITHDRAW | ---->| JOINING |-----------------------------------------------+ +-----------+ 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 'net/tipc/group.h')
-rw-r--r--net/tipc/group.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/tipc/group.h b/net/tipc/group.h
index 5ffffd0121a2..dee79477d499 100644
--- a/net/tipc/group.h
+++ b/net/tipc/group.h
@@ -44,8 +44,10 @@ struct tipc_msg;
struct tipc_group *tipc_group_create(struct net *net, u32 portid,
struct tipc_group_req *mreq);
+void tipc_group_join(struct net *net, struct tipc_group *grp, int *sk_rcv_buf);
void tipc_group_delete(struct net *net, struct tipc_group *grp);
-void tipc_group_add_member(struct tipc_group *grp, u32 node, u32 port);
+void tipc_group_add_member(struct tipc_group *grp, u32 node,
+ u32 port, u32 instance);
struct tipc_nlist *tipc_group_dests(struct tipc_group *grp);
void tipc_group_self(struct tipc_group *grp, struct tipc_name_seq *seq,
int *scope);