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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2016-06-30 16:11:17 -0700
committerDavid S. Miller <davem@davemloft.net>2016-07-01 16:45:17 -0400
commit8315011ad67670691545ed394968435f0a0bb29e (patch)
treeadbf6708286fac52b03fffe25e3a8f3b4d570197 /net/rds
parentb04e8554f7637999af8f54cca4dcfcf49f2ae7c8 (diff)
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RDS: TCP: Simplify reconnect to avoid duelling reconnnect attempts
When reconnecting, the peer with the smaller IP address will initiate the reconnect, to avoid needless duelling SYN issues. Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds')
-rw-r--r--net/rds/connection.c4
-rw-r--r--net/rds/threads.c5
2 files changed, 6 insertions, 3 deletions
diff --git a/net/rds/connection.c b/net/rds/connection.c
index 1b0c2a783b5e..19a4fee5f4dd 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -355,9 +355,7 @@ void rds_conn_shutdown(struct rds_conn_path *cp)
rcu_read_lock();
if (!hlist_unhashed(&conn->c_hash_node)) {
rcu_read_unlock();
- if (conn->c_trans->t_type != RDS_TRANS_TCP ||
- cp->cp_outgoing == 1)
- rds_queue_reconnect(cp);
+ rds_queue_reconnect(cp);
} else {
rcu_read_unlock();
}
diff --git a/net/rds/threads.c b/net/rds/threads.c
index e8f0941f0548..bc97d67f29cc 100644
--- a/net/rds/threads.c
+++ b/net/rds/threads.c
@@ -125,6 +125,11 @@ void rds_queue_reconnect(struct rds_conn_path *cp)
conn, &conn->c_laddr, &conn->c_faddr,
cp->cp_reconnect_jiffies);
+ /* let peer with smaller addr initiate reconnect, to avoid duels */
+ if (conn->c_trans->t_type == RDS_TRANS_TCP &&
+ conn->c_laddr > conn->c_faddr)
+ return;
+
set_bit(RDS_RECONNECT_PENDING, &cp->cp_flags);
if (cp->cp_reconnect_jiffies == 0) {
cp->cp_reconnect_jiffies = rds_sysctl_reconnect_min_jiffies;