Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7f260e85 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

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: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent a6f951dd

net/sunrpc/xprtsock.c

+13 −0
Original line number Diff line number Diff line
@@ -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);