rds: tcp: set linger to 1 when unloading a rds-tcp

If we are unloading the rds_tcp module, we can set linger to 1
and drop pending packets to accelerate reconnect. The peer will
end up resetting the connection based on new generation numbers
of the new incarnation, so hanging on to unsent TCP packets via
linger is mostly pointless in this case.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Tested-by: Jenny Xu <jenny.x.xu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c
index 5a62a083bb5a..cbe08a1fa4c7 100644
--- a/net/rds/tcp_connect.c
+++ b/net/rds/tcp_connect.c
@@ -170,6 +170,8 @@ void rds_tcp_conn_path_shutdown(struct rds_conn_path *cp)
                  cp->cp_conn, tc, sock);
 
         if (sock) {
+                if (cp->cp_conn->c_destroy_in_prog)
+                        rds_tcp_set_linger(sock);
                 sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN);
                 lock_sock(sock->sk);
                 rds_tcp_restore_callbacks(sock, tc); /* tc->tc_sock = NULL */