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authorTrond Myklebust <Trond.Myklebust@netapp.com>2013-09-24 11:25:22 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-10-01 18:22:10 -0400
commit7f260e8575bf53b93b77978c1e39f8e67612759c (patch)
tree7f1ddee8da8fb7b4a7c771c1e1b1c31fe223ae8a
parenta6f951ddbdfb7bd87d31a44f61abe202ed6ce57f (diff)
downloadlinux-7f260e8575bf53b93b77978c1e39f8e67612759c.tar.bz2
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 <Trond.Myklebust@netapp.com>
-rw-r--r--net/sunrpc/xprtsock.c13
1 files changed, 13 insertions, 0 deletions
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);