layout: refactoring of all_nodes

src/garage/admin/mod.rs

@@ -126,8 +126,8 @@ impl AdminRpcHandler {
 			opt_to_send.all_nodes = false;
 
 			let mut failures = vec![];
-			let layout = self.garage.system.cluster_layout().clone();
-			for node in layout.current().node_ids().iter() {
+			let all_nodes = self.garage.system.cluster_layout().all_nodes().to_vec();
+			for node in all_nodes.iter() {
 				let node = (*node).into();
 				let resp = self
 					.endpoint
@@ -163,9 +163,9 @@ impl AdminRpcHandler {
 	async fn handle_stats(&self, opt: StatsOpt) -> Result<AdminRpc, Error> {
 		if opt.all_nodes {
 			let mut ret = String::new();
-			let layout = self.garage.system.cluster_layout().clone();
+			let all_nodes = self.garage.system.cluster_layout().all_nodes().to_vec();
 
-			for node in layout.current().node_ids().iter() {
+			for node in all_nodes.iter() {
 				let mut opt = opt.clone();
 				opt.all_nodes = false;
 				opt.skip_global = true;
@@ -275,6 +275,7 @@ impl AdminRpcHandler {
 		let mut ret = String::new();
 
 		// Gather storage node and free space statistics
+		// TODO: not only layout.current() ???
 		let layout = &self.garage.system.cluster_layout();
 		let mut node_partition_count = HashMap::<Uuid, u64>::new();
 		for short_id in layout.current().ring_assignment_data.iter() {
@@ -440,8 +441,8 @@ impl AdminRpcHandler {
 	) -> Result<AdminRpc, Error> {
 		if all_nodes {
 			let mut ret = vec![];
-			let layout = self.garage.system.cluster_layout().clone();
-			for node in layout.current().node_ids().iter() {
+			let all_nodes = self.garage.system.cluster_layout().all_nodes().to_vec();
+			for node in all_nodes.iter() {
 				let node = (*node).into();
 				match self
 					.endpoint
@@ -488,8 +489,8 @@ impl AdminRpcHandler {
 	) -> Result<AdminRpc, Error> {
 		if all_nodes {
 			let mut ret = vec![];
-			let layout = self.garage.system.cluster_layout().clone();
-			for node in layout.current().node_ids().iter() {
+			let all_nodes = self.garage.system.cluster_layout().all_nodes().to_vec();
+			for node in all_nodes.iter() {
 				let node = (*node).into();
 				match self
 					.endpoint

src/garage/cli/layout.rs

@@ -49,6 +49,7 @@ pub async fn cmd_assign_role(
 	};
 
 	let mut layout = fetch_layout(rpc_cli, rpc_host).await?;
+	let all_nodes = layout.all_nodes().into_owned();
 
 	let added_nodes = args
 		.node_ids
@@ -58,7 +59,7 @@ pub async fn cmd_assign_role(
 				status
 					.iter()
 					.map(|adv| adv.id)
-					.chain(layout.current().node_ids().iter().cloned()),
+					.chain(all_nodes.iter().cloned()),
 				node_id,
 			)
 		})
@@ -68,8 +69,7 @@ pub async fn cmd_assign_role(
 	roles.merge(&layout.staging.get().roles);
 
 	for replaced in args.replace.iter() {
-		let replaced_node =
-			find_matching_node(layout.current().node_ids().iter().cloned(), replaced)?;
+		let replaced_node = find_matching_node(all_nodes.iter().cloned(), replaced)?;
 		match roles.get(&replaced_node) {
 			Some(NodeRoleV(Some(_))) => {
 				layout

src/model/helper/bucket.rs

@@ -450,8 +450,12 @@ impl<'a> BucketHelper<'a> {
 
 		#[cfg(feature = "k2v")]
 		{
-			// TODO: not only current
-			let node_id_vec = self.0.system.cluster_layout().current().node_ids().to_vec();
+			let node_id_vec = self
+				.0
+				.system
+				.cluster_layout()
+				.all_nongateway_nodes()
+				.into_owned();
 			let k2vindexes = self
 				.0
 				.k2v

src/rpc/layout/history.rs

@@ -60,6 +60,21 @@ impl LayoutHistory {
 		(self.current().version, self.all_ack(), self.min_stored())
 	}
 
+	pub fn all_nodes(&self) -> Cow<'_, [Uuid]> {
+		// TODO: cache this
+		if self.versions.len() == 1 {
+			self.versions[0].all_nodes().into()
+		} else {
+			let set = self
+				.versions
+				.iter()
+				.map(|x| x.all_nodes())
+				.flatten()
+				.collect::<HashSet<_>>();
+			set.into_iter().copied().collect::<Vec<_>>().into()
+		}
+	}
+
 	pub fn all_nongateway_nodes(&self) -> Cow<'_, [Uuid]> {
 		// TODO: cache this
 		if self.versions.len() == 1 {

src/rpc/layout/version.rs

@@ -38,22 +38,19 @@ impl LayoutVersion {
 
 	// ===================== accessors ======================
 
-	/// Returns a list of IDs of nodes that currently have
-	/// a role in the cluster
-	pub fn node_ids(&self) -> &[Uuid] {
+	/// Returns a list of IDs of nodes that have a role in this
+	/// version of the cluster layout, including gateway nodes
+	pub fn all_nodes(&self) -> &[Uuid] {
 		&self.node_id_vec[..]
 	}
 
-	/// Returns the uuids of the non_gateway nodes in self.node_id_vec.
+	/// Returns a list of IDs of nodes that have a storage capacity
+	/// assigned in this version of the cluster layout
 	pub fn nongateway_nodes(&self) -> &[Uuid] {
 		&self.node_id_vec[..self.nongateway_node_count]
 	}
 
-	pub fn num_nodes(&self) -> usize {
-		self.node_id_vec.len()
-	}
-
-	/// Returns the role of a node in the layout
+	/// Returns the role of a node in the layout, if it has one
 	pub fn node_role(&self, node: &Uuid) -> Option<&NodeRole> {
 		match self.roles.get(node) {
 			Some(NodeRoleV(Some(v))) => Some(v),
@@ -61,7 +58,7 @@ impl LayoutVersion {
 		}
 	}
 
-	/// Given a node uuids, this function returns its capacity or fails if it does not have any
+	/// Returns the capacity of a node in the layout, if it has one
 	pub fn get_node_capacity(&self, uuid: &Uuid) -> Option<u64> {
 		match self.node_role(uuid) {
 			Some(NodeRole {

src/rpc/system.rs

@@ -609,7 +609,7 @@ impl System {
 		while !*stop_signal.borrow() {
 			let not_configured = self.cluster_layout().check().is_err();
 			let no_peers = self.fullmesh.get_peer_list().len() < self.replication_factor;
-			let expected_n_nodes = self.cluster_layout().current().num_nodes();
+			let expected_n_nodes = self.cluster_layout().all_nodes().len();
 			let bad_peers = self
 				.fullmesh
 				.get_peer_list()

src/table/replication/fullcopy.rs

@@ -35,10 +35,10 @@ impl TableReplication for TableFullReplication {
 	}
 
 	fn write_nodes(&self, _hash: &Hash) -> Vec<Uuid> {
-		self.system.cluster_layout().current().node_ids().to_vec()
+		self.system.cluster_layout().current().all_nodes().to_vec()
 	}
 	fn write_quorum(&self) -> usize {
-		let nmembers = self.system.cluster_layout().current().node_ids().len();
+		let nmembers = self.system.cluster_layout().current().all_nodes().len();
 		if nmembers > self.max_faults {
 			nmembers - self.max_faults
 		} else {
@@ -62,7 +62,7 @@ impl TableReplication for TableFullReplication {
 				partition: 0u16,
 				first_hash: [0u8; 32].into(),
 				last_hash: [0xff; 32].into(),
-				storage_nodes: Vec::from_iter(layout.current().node_ids().to_vec()),
+				storage_nodes: Vec::from_iter(layout.current().all_nodes().to_vec()),
 			}],
 		}
 	}