[next-0.10] cache layout check result

src/rpc/layout/helper.rs

@@ -41,6 +41,7 @@ pub struct LayoutHelper {
 
 	trackers_hash: Hash,
 	staging_hash: Hash,
+	is_check_ok: bool,
 
 	// ack lock: counts in-progress write operations for each
 	// layout version ; we don't increase the ack update tracker
@@ -107,6 +108,8 @@ impl LayoutHelper {
 			.entry(layout.current().version)
 			.or_insert(AtomicUsize::new(0));
 
+		let is_check_ok = layout.check().is_ok();
+
 		LayoutHelper {
 			replication_factor,
 			consistency_mode,
@@ -118,6 +121,7 @@ impl LayoutHelper {
 			trackers_hash,
 			staging_hash,
 			ack_lock,
+			is_check_ok,
 		}
 	}
 
@@ -153,6 +157,10 @@ impl LayoutHelper {
 		&self.inner().versions
 	}
 
+	pub fn is_check_ok(&self) -> bool {
+		self.is_check_ok
+	}
+
 	/// Return all nodes that have a role (gateway or storage)
 	/// in one of the currently active layout versions
 	pub fn all_nodes(&self) -> &[Uuid] {

src/rpc/layout/manager.rs

@@ -160,12 +160,12 @@ impl LayoutManager {
 	fn merge_layout(&self, adv: &LayoutHistory) -> Option<LayoutHistory> {
 		let mut layout = self.layout.write().unwrap();
 		let prev_digest = layout.digest();
-		let prev_layout_check = layout.inner().check().is_ok();
+		let prev_layout_check = layout.is_check_ok();
 
 		if !prev_layout_check || adv.check().is_ok() {
 			if layout.update(|l| l.merge(adv)) {
 				layout.update_trackers(self.node_id);
-				if prev_layout_check && layout.inner().check().is_err() {
+				if prev_layout_check && !layout.is_check_ok() {
 					panic!("Merged two correct layouts and got an incorrect layout.");
 				}
 				assert!(layout.digest() != prev_digest);

src/rpc/system.rs

@@ -634,7 +634,7 @@ impl System {
 				.filter(|p| p.is_up())
 				.count();
 
-			let not_configured = self.cluster_layout().inner().check().is_err();
+			let not_configured = !self.cluster_layout().is_check_ok();
 			let no_peers = n_connected < self.replication_factor.into();
 			let expected_n_nodes = self.cluster_layout().all_nodes().len();
 			let bad_peers = n_connected != expected_n_nodes;