ocfs2/cluster: Get rid of arguments to the timeout routines

We keep seeing bug reports related to NULL pointer derefs in
o2net_set_nn_state(). When I originally wrote up the configurable timeout
patch, I had tried to plan for multiple clusters. This was silly.

The timeout routines all use o2nm_single_cluster so there's no point in
passing an argument at all. This patch removes the arguments and kills those
bugs dead.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

fs/ocfs2/cluster/tcp.c

@@ -142,23 +142,17 @@ static void o2net_idle_timer(unsigned long data);
 static void o2net_sc_postpone_idle(struct o2net_sock_container *sc);
 static void o2net_sc_reset_idle_timer(struct o2net_sock_container *sc);
 
-/*
- * FIXME: These should use to_o2nm_cluster_from_node(), but we end up
- * losing our parent link to the cluster during shutdown. This can be
- * solved by adding a pre-removal callback to configfs, or passing
- * around the cluster with the node. -jeffm
- */
-static inline int o2net_reconnect_delay(struct o2nm_node *node)
+static inline int o2net_reconnect_delay(void)
 {
 	return o2nm_single_cluster->cl_reconnect_delay_ms;
 }
 
-static inline int o2net_keepalive_delay(struct o2nm_node *node)
+static inline int o2net_keepalive_delay(void)
 {
 	return o2nm_single_cluster->cl_keepalive_delay_ms;
 }
 
-static inline int o2net_idle_timeout(struct o2nm_node *node)
+static inline int o2net_idle_timeout(void)
 {
 	return o2nm_single_cluster->cl_idle_timeout_ms;
 }
@@ -444,9 +438,9 @@ static void o2net_set_nn_state(struct o2net_node *nn,
 		/* delay if we're withing a RECONNECT_DELAY of the
 		 * last attempt */
 		delay = (nn->nn_last_connect_attempt +
-			 msecs_to_jiffies(o2net_reconnect_delay(NULL)))
+			 msecs_to_jiffies(o2net_reconnect_delay()))
 			- jiffies;
-		if (delay > msecs_to_jiffies(o2net_reconnect_delay(NULL)))
+		if (delay > msecs_to_jiffies(o2net_reconnect_delay()))
 			delay = 0;
 		mlog(ML_CONN, "queueing conn attempt in %lu jiffies\n", delay);
 		queue_delayed_work(o2net_wq, &nn->nn_connect_work, delay);
@@ -460,7 +454,7 @@ static void o2net_set_nn_state(struct o2net_node *nn,
 		 * the connect_expired work will do anything.  The rest will see
 		 * that it's already queued and do nothing.
 		 */
-		delay += msecs_to_jiffies(o2net_idle_timeout(NULL));
+		delay += msecs_to_jiffies(o2net_idle_timeout());
 		queue_delayed_work(o2net_wq, &nn->nn_connect_expired, delay);
 	}
 
@@ -1159,23 +1153,23 @@ static int o2net_check_handshake(struct o2net_sock_container *sc)
 	 * but isn't. This can ultimately cause corruption.
 	 */
 	if (be32_to_cpu(hand->o2net_idle_timeout_ms) !=
-				o2net_idle_timeout(sc->sc_node)) {
+				o2net_idle_timeout()) {
 		mlog(ML_NOTICE, SC_NODEF_FMT " uses a network idle timeout of "
 		     "%u ms, but we use %u ms locally.  disconnecting\n",
 		     SC_NODEF_ARGS(sc),
 		     be32_to_cpu(hand->o2net_idle_timeout_ms),
-		     o2net_idle_timeout(sc->sc_node));
+		     o2net_idle_timeout());
 		o2net_ensure_shutdown(nn, sc, -ENOTCONN);
 		return -1;
 	}
 
 	if (be32_to_cpu(hand->o2net_keepalive_delay_ms) !=
-			o2net_keepalive_delay(sc->sc_node)) {
+			o2net_keepalive_delay()) {
 		mlog(ML_NOTICE, SC_NODEF_FMT " uses a keepalive delay of "
 		     "%u ms, but we use %u ms locally.  disconnecting\n",
 		     SC_NODEF_ARGS(sc),
 		     be32_to_cpu(hand->o2net_keepalive_delay_ms),
-		     o2net_keepalive_delay(sc->sc_node));
+		     o2net_keepalive_delay());
 		o2net_ensure_shutdown(nn, sc, -ENOTCONN);
 		return -1;
 	}
@@ -1353,12 +1347,11 @@ static void o2net_initialize_handshake(void)
 {
 	o2net_hand->o2hb_heartbeat_timeout_ms = cpu_to_be32(
 		O2HB_MAX_WRITE_TIMEOUT_MS);
-	o2net_hand->o2net_idle_timeout_ms = cpu_to_be32(
-		o2net_idle_timeout(NULL));
+	o2net_hand->o2net_idle_timeout_ms = cpu_to_be32(o2net_idle_timeout());
 	o2net_hand->o2net_keepalive_delay_ms = cpu_to_be32(
-		o2net_keepalive_delay(NULL));
+		o2net_keepalive_delay());
 	o2net_hand->o2net_reconnect_delay_ms = cpu_to_be32(
-		o2net_reconnect_delay(NULL));
+		o2net_reconnect_delay());
 }
 
 /* ------------------------------------------------------------ */
@@ -1404,8 +1397,8 @@ static void o2net_idle_timer(unsigned long data)
 
 	printk(KERN_INFO "o2net: connection to " SC_NODEF_FMT " has been idle for %u.%u "
 	     "seconds, shutting it down.\n", SC_NODEF_ARGS(sc),
-		     o2net_idle_timeout(sc->sc_node) / 1000,
-		     o2net_idle_timeout(sc->sc_node) % 1000);
+		     o2net_idle_timeout() / 1000,
+		     o2net_idle_timeout() % 1000);
 	mlog(ML_NOTICE, "here are some times that might help debug the "
 	     "situation: (tmr %ld.%ld now %ld.%ld dr %ld.%ld adv "
 	     "%ld.%ld:%ld.%ld func (%08x:%u) %ld.%ld:%ld.%ld)\n",
@@ -1433,10 +1426,10 @@ static void o2net_sc_reset_idle_timer(struct o2net_sock_container *sc)
 {
 	o2net_sc_cancel_delayed_work(sc, &sc->sc_keepalive_work);
 	o2net_sc_queue_delayed_work(sc, &sc->sc_keepalive_work,
-		      msecs_to_jiffies(o2net_keepalive_delay(sc->sc_node)));
+		      msecs_to_jiffies(o2net_keepalive_delay()));
 	do_gettimeofday(&sc->sc_tv_timer);
 	mod_timer(&sc->sc_idle_timeout,
-	       jiffies + msecs_to_jiffies(o2net_idle_timeout(sc->sc_node)));
+	       jiffies + msecs_to_jiffies(o2net_idle_timeout()));
 }
 
 static void o2net_sc_postpone_idle(struct o2net_sock_container *sc)
@@ -1578,8 +1571,8 @@ static void o2net_connect_expired(struct work_struct *work)
 		mlog(ML_ERROR, "no connection established with node %u after "
 		     "%u.%u seconds, giving up and returning errors.\n",
 		     o2net_num_from_nn(nn),
-		     o2net_idle_timeout(NULL) / 1000,
-		     o2net_idle_timeout(NULL) % 1000);
+		     o2net_idle_timeout() / 1000,
+		     o2net_idle_timeout() % 1000);
 
 		o2net_set_nn_state(nn, NULL, 0, -ENOTCONN);
 	}
@@ -1634,7 +1627,7 @@ static void o2net_hb_node_up_cb(struct o2nm_node *node, int node_num,
 
 	/* ensure an immediate connect attempt */
 	nn->nn_last_connect_attempt = jiffies -
-		(msecs_to_jiffies(o2net_reconnect_delay(node)) + 1);
+		(msecs_to_jiffies(o2net_reconnect_delay()) + 1);
 
 	if (node_num != o2nm_this_node()) {
 		/* believe it or not, accept and node hearbeating testing