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SUNRPC: Set the TCP user timeout option on client sockets

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Use the TCP_USER_TIMEOUT socket option to advertise to the server
how long we will keep the connection open if there is unacknowledged
data. See RFC5482.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2015-06-20 15:31:54 -04:00
parent 4876cc779f
commit 775f06ab49
1 changed files with 7 additions and 0 deletions
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7
net/sunrpc/xprtsock.c
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@ -2117,6 +2117,7 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
unsigned int keepidle = xprt->timeout->to_initval / HZ;
unsigned int keepcnt = xprt->timeout->to_retries + 1;
unsigned int opt_on = 1;
unsigned int timeo;
/* TCP Keepalive options */
kernel_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
@ -2128,6 +2129,12 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
kernel_setsockopt(sock, SOL_TCP, TCP_KEEPCNT,
(char *)&keepcnt, sizeof(keepcnt));
/* TCP user timeout (see RFC5482) */
timeo = jiffies_to_msecs(xprt->timeout->to_initval) *
(xprt->timeout->to_retries + 1);
kernel_setsockopt(sock, SOL_TCP, TCP_USER_TIMEOUT,
(char *)&timeo, sizeof(timeo));
write_lock_bh(&sk->sk_callback_lock);
xs_save_old_callbacks(transport, sk);