From c2b22bcf2e18a279afd80a8c57e936014acf3348 Mon Sep 17 00:00:00 2001 From: Jon Maloy Date: Mon, 8 Jan 2018 21:03:27 +0100 Subject: tipc: simplify group LEAVE sequence After the changes in the previous commit the group LEAVE sequence can be simplified. We now let the arrival of a LEAVE message unconditionally issue a group DOWN event to the user. When a topology WITHDRAW event is received, the member, if it still there, is set to state LEAVING, but we only issue a group DOWN event when the link to the peer node is gone, so that no LEAVE message is to be expected. Acked-by: Ying Xue Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/group.c | 40 +++++++++------------------------------- 1 file changed, 9 insertions(+), 31 deletions(-) (limited to 'net') diff --git a/net/tipc/group.c b/net/tipc/group.c index e08b7acc7b2d..bdc54be9c07e 100644 --- a/net/tipc/group.c +++ b/net/tipc/group.c @@ -749,14 +749,8 @@ void tipc_group_proto_rcv(struct tipc_group *grp, bool *usr_wakeup, list_del_init(&m->list); list_del_init(&m->small_win); *usr_wakeup = true; - - /* Wait until WITHDRAW event is received */ - if (m->state != MBR_LEAVING) { - tipc_group_decr_active(grp, m); - m->state = MBR_LEAVING; - return; - } - /* Otherwise deliver member WITHDRAW event */ + tipc_group_decr_active(grp, m); + m->state = MBR_LEAVING; tipc_group_create_event(grp, m, TIPC_WITHDRAWN, m->bc_syncpt, inputq); return; @@ -838,7 +832,6 @@ void tipc_group_member_evt(struct tipc_group *grp, int event = evt->event; struct tipc_member *m; struct net *net; - bool node_up; u32 self; if (!grp) @@ -878,30 +871,15 @@ void tipc_group_member_evt(struct tipc_group *grp, *usr_wakeup = true; m->usr_pending = false; - node_up = tipc_node_is_up(net, node); - - if (node_up) { - /* Hold back event if a LEAVE msg should be expected */ - if (m->state != MBR_LEAVING) { - tipc_group_decr_active(grp, m); - m->state = MBR_LEAVING; - } else { - tipc_group_create_event(grp, m, TIPC_WITHDRAWN, - m->bc_syncpt, inputq); - } - } else { - if (m->state != MBR_LEAVING) { - tipc_group_decr_active(grp, m); - m->state = MBR_LEAVING; - tipc_group_create_event(grp, m, TIPC_WITHDRAWN, - m->bc_rcv_nxt, inputq); - } else { - tipc_group_create_event(grp, m, TIPC_WITHDRAWN, - m->bc_syncpt, inputq); - } - } + tipc_group_decr_active(grp, m); + m->state = MBR_LEAVING; list_del_init(&m->list); list_del_init(&m->small_win); + + /* Only send event if no LEAVE message can be expected */ + if (!tipc_node_is_up(net, node)) + tipc_group_create_event(grp, m, TIPC_WITHDRAWN, + m->bc_rcv_nxt, inputq); } *sk_rcvbuf = tipc_group_rcvbuf_limit(grp); } -- cgit v1.2.3