From 7f260e8575bf53b93b77978c1e39f8e67612759c Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 24 Sep 2013 11:25:22 -0400 Subject: [PATCH] SUNRPC: Enable the keepalive option for TCP sockets For NFSv4 we want to avoid retransmitting RPC calls unless the TCP connection breaks. However we still want to detect TCP connection breakage as soon as possible. Do this by setting the keepalive option with the idle timeout and count set to the 'timeo' and 'retrans' mount options. Signed-off-by: Trond Myklebust --- net/sunrpc/xprtsock.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index ee03d35677d9..208a7634b916 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -2112,6 +2112,19 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) if (!transport->inet) { struct sock *sk = sock->sk; + unsigned int keepidle = xprt->timeout->to_initval / HZ; + unsigned int keepcnt = xprt->timeout->to_retries + 1; + unsigned int opt_on = 1; + + /* TCP Keepalive options */ + kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, + (char *)&opt_on, sizeof(opt_on)); + kernel_setsockopt(sock, SOL_TCP, TCP_KEEPIDLE, + (char *)&keepidle, sizeof(keepidle)); + kernel_setsockopt(sock, SOL_TCP, TCP_KEEPINTVL, + (char *)&keepidle, sizeof(keepidle)); + kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT, + (char *)&keepcnt, sizeof(keepcnt)); write_lock_bh(&sk->sk_callback_lock); -- GitLab