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Commit 02910177 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

SUNRPC: Fix reconnection timeouts 



When the connect attempt fails and backs off, we should start the clock
at the last connection attempt, not time at which we queue up the
reconnect job.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 206b3bb5

net/sunrpc/xprtsock.c

+20 −7
Original line number Diff line number Diff line
@@ -2173,6 +2173,8 @@ static void xs_udp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock) 
		write_unlock_bh(&sk->sk_callback_lock);

	}

	xs_udp_do_set_buffer_size(xprt);



	xprt->stat.connect_start = jiffies;

}



static void xs_udp_setup_socket(struct work_struct *work)
@@ -2384,6 +2386,16 @@ static void xs_tcp_setup_socket(struct work_struct *work) 
	xprt_wake_pending_tasks(xprt, status);

}



static unsigned long xs_reconnect_delay(const struct rpc_xprt *xprt)

{

	unsigned long start, now = jiffies;



	start = xprt->stat.connect_start + xprt->reestablish_timeout;

	if (time_after(start, now))

		return start - now;

	return 0;

}



/**

 * xs_connect - connect a socket to a remote endpoint

 * @xprt: pointer to transport structure
@@ -2401,6 +2413,7 @@ static void xs_tcp_setup_socket(struct work_struct *work) 
static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task)

{

	struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);

	unsigned long delay = 0;



	WARN_ON_ONCE(!xprt_lock_connect(xprt, task, transport));
@@ -2412,19 +2425,19 @@ static void xs_connect(struct rpc_xprt *xprt, struct rpc_task *task) 
		/* Start by resetting any existing state */

		xs_reset_transport(transport);



		queue_delayed_work(xprtiod_workqueue,

				   &transport->connect_worker,

				   xprt->reestablish_timeout);

		delay = xs_reconnect_delay(xprt);



		xprt->reestablish_timeout <<= 1;

		if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)

			xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;

		if (xprt->reestablish_timeout > XS_TCP_MAX_REEST_TO)

			xprt->reestablish_timeout = XS_TCP_MAX_REEST_TO;

	} else {

	} else

		dprintk("RPC:       xs_connect scheduled xprt %p\n", xprt);



	queue_delayed_work(xprtiod_workqueue,

				   &transport->connect_worker, 0);

	}

			&transport->connect_worker,

			delay);

}



/**