[#2079] cli: Do not panic in object hash

Sign RPC requests with the provided key.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

.github/workflows/changelog.yml

@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - support/**
 
 jobs:
   build:

.github/workflows/config-update.yml

@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - support/**
 
 jobs:
   build:

.github/workflows/dco.yml

@@ -4,6 +4,7 @@ on:
   pull_request:
     branches:
       - master
+      - support/**
 
 jobs:
   commits_check_job:

.github/workflows/go.yml

@@ -4,11 +4,13 @@ on:
   push:
     branches:
       - master
+      - support/**
     paths-ignore:
       - '*.md'
   pull_request:
     branches:
       - master
+      - support/**
     paths-ignore:
       - '*.md'
 

CHANGELOG.md

@@ -4,11 +4,48 @@ Changelog for NeoFS Node
 ## [Unreleased]
 
 ### Added
+- `session` flag support to `neofs-cli object hash` (#2029)
+- Shard can now change mode when encountering background disk errors (#2035)
+- Background workers and object service now use separate client caches (#2048)
+- `replicator.pool_size` config field to tune replicator pool size (#2049)
+- Fix NNS hash parsing in morph client (#2063)
+
 ### Changed
+- `object lock` command reads CID and OID the same way other commands do (#1971)
+- `LOCK` object are stored on every container node (#1502)
+
 ### Fixed
+- Open FSTree in sync mode by default (#1992)
+- `neofs-cli container nodes`'s output (#1991)
+- Do not panic and return correct errors for bad inputs in `GET_RANGE` (#2007, #2024)
+- Correctly select the shard for applying tree service operations (#1996)
+- Physical child object removal by GC (#1699)
+- Increase error counter for write-cache flush errors (#1818)
+- Broadcasting helper objects (#1972)
+- `neofs-cli lock object`'s `lifetime` flag handling (#1972)
+- Do not move write-cache in read-only mode for flushing (#1906)
+- Child object collection on CLI side with a bearer token (#2000)
+- Fix concurrent map writes in `Object.Put` service (#2037)
+- Malformed request errors' reasons in the responses (#2028)
+- Session token's IAT and NBF checks in ACL service (#2028)
+- Losing meta information on request forwarding (#2040)
+- Assembly process triggered by a request with a bearer token (#2040)
+- Losing locking context after metabase resync (#1502)
+- Removing all trees by container ID if tree ID is empty in `pilorama.Forest.TreeDrop` (#1940)
+- Concurrent mode changes in the metabase and blobstor (#2057)
+- Panic in IR when performing HEAD requests (#2069)
+- Write-cache flush duplication (#2074)
+- Ignore error if a transaction already exists in a morph client (#2075)
+- Pack arguments of `setPrice` invocation during contract update (#2078)
+- `neofs-cli object hash` panic (#2079)
+
 ### Removed
 ### Updated
 ### Updating from v0.34.0
+Pass CID and OID parameters via the `--cid` and `--oid` flags, not as the command arguments.
+
+Replicator pool size can now be fine-tuned with `replicator.pool_size` config field.
+The default value is taken from `object.put.pool_size_remote` as in earlier versions.
 
 ## [0.34.0] - 2022-10-31 - Marado (마라도, 馬羅島)
 

cmd/neofs-adm/internal/modules/morph/initialize_deploy.go

@@ -27,6 +27,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
 	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
 	"github.com/nspcc-dev/neo-go/pkg/vm/vmstate"
+	"github.com/nspcc-dev/neofs-contract/common"
 	"github.com/nspcc-dev/neofs-contract/nns"
 	"github.com/nspcc-dev/neofs-node/pkg/innerring"
 	morphClient "github.com/nspcc-dev/neofs-node/pkg/morph/client"
@@ -106,7 +107,11 @@ func (c *initializeContext) deployNNS(method string) error {
 	nnsCs, err := c.nnsContractState()
 	if err == nil {
 		if nnsCs.NEF.Checksum == cs.NEF.Checksum {
+			if method == deployMethodName {
 				c.Command.Println("NNS contract is already deployed.")
+			} else {
+				c.Command.Println("NNS contract is already updated.")
+			}
 			return nil
 		}
 		h = nnsCs.Hash
@@ -206,8 +211,11 @@ func (c *initializeContext) updateContracts() error {
 	}
 
 	if err := c.sendCommitteeTx(w.Bytes(), false); err != nil {
+		if !strings.Contains(err.Error(), common.ErrAlreadyUpdated) {
 			return err
 		}
+		c.Command.Println("Alphabet contracts are already updated.")
+	}
 
 	w.Reset()
 
@@ -243,8 +251,12 @@ func (c *initializeContext) updateContracts() error {
 		params := getContractDeployParameters(cs, c.getContractDeployData(ctrName, keysParam))
 		res, err := c.CommitteeAct.MakeCall(invokeHash, method, params...)
 		if err != nil {
+			if method != updateMethodName || !strings.Contains(err.Error(), common.ErrAlreadyUpdated) {
 				return fmt.Errorf("deploy contract: %w", err)
 			}
+			c.Command.Printf("%s contract is already updated.\n", ctrName)
+			continue
+		}
 
 		w.WriteBytes(res.Script)
 
@@ -275,6 +287,8 @@ func (c *initializeContext) updateContracts() error {
 	c.Command.Printf("NNS: Set %s -> %s\n", morphClient.NNSGroupKeyName, hex.EncodeToString(groupKey.Bytes()))
 
 	emit.Opcodes(w.BinWriter, opcode.LDSFLD0)
+	emit.Int(w.BinWriter, 1)
+	emit.Opcodes(w.BinWriter, opcode.PACK)
 	emit.AppCallNoArgs(w.BinWriter, nnsHash, "setPrice", callflag.All)
 
 	if err := c.sendCommitteeTx(w.Bytes(), false); err != nil {

cmd/neofs-adm/internal/modules/morph/initialize_nns.go

@@ -261,6 +261,8 @@ func parseNNSResolveResult(res stackitem.Item) (util.Uint160, error) {
 			continue
 		}
 
+		// We support several formats for hash encoding, this logic should be maintained in sync
+		// with nnsResolve from pkg/morph/client/nns.go
 		h, err := util.Uint160DecodeStringLE(string(bs))
 		if err == nil {
 			return h, nil

cmd/neofs-cli/modules/container/nodes.go

@@ -39,12 +39,14 @@ var containerNodesCmd = &cobra.Command{
 		binCnr := make([]byte, sha256.Size)
 		id.Encode(binCnr)
 
+		policy := cnr.PlacementPolicy()
+
 		var cnrNodes [][]netmap.NodeInfo
-		cnrNodes, err = resmap.NetMap().ContainerNodes(cnr.PlacementPolicy(), binCnr)
+		cnrNodes, err = resmap.NetMap().ContainerNodes(policy, binCnr)
 		common.ExitOnErr(cmd, "could not build container nodes for given container: %w", err)
 
 		for i := range cnrNodes {
-			cmd.Printf("Rep %d\n", i+1)
+			cmd.Printf("Descriptor #%d, REP %d:\n", i+1, policy.ReplicaNumberByIndex(i))
 			for j := range cnrNodes[i] {
 				common.PrettyPrintNodeInfo(cmd, cnrNodes[i][j], j, "\t", short)
 			}

cmd/neofs-cli/modules/object/hash.go

@@ -32,6 +32,7 @@ var objectHashCmd = &cobra.Command{
 
 func initObjectHashCmd() {
 	commonflags.Init(objectHashCmd)
+	initFlagSession(objectHashCmd, "RANGEHASH")
 
 	flags := objectHashCmd.Flags()
 
@@ -63,11 +64,13 @@ func getObjectHash(cmd *cobra.Command, _ []string) {
 	common.ExitOnErr(cmd, "could not decode salt: %w", err)
 
 	pk := key.GetOrGenerate(cmd)
+	cli := internalclient.GetSDKClientByFlag(cmd, pk, commonflags.RPC)
 
 	tz := typ == hashTz
 	fullHash := len(ranges) == 0
 	if fullHash {
 		var headPrm internalclient.HeadObjectPrm
+		headPrm.SetClient(cli)
 		Prepare(cmd, &headPrm)
 		headPrm.SetAddress(objAddr)
 
@@ -93,8 +96,6 @@ func getObjectHash(cmd *cobra.Command, _ []string) {
 		return
 	}
 
-	cli := internalclient.GetSDKClientByFlag(cmd, pk, commonflags.RPC)
-
 	var hashPrm internalclient.HashPayloadRangesPrm
 	hashPrm.SetClient(cli)
 	Prepare(cmd, &hashPrm)

cmd/neofs-cli/modules/object/lock.go

@@ -21,22 +21,22 @@ import (
 
 // object lock command.
 var objectLockCmd = &cobra.Command{
-	Use:   "lock CONTAINER OBJECT...",
+	Use:   "lock",
 	Short: "Lock object in container",
 	Long:  "Lock object in container",
-	Args:  cobra.MinimumNArgs(2),
+	Run: func(cmd *cobra.Command, _ []string) {
-	Run: func(cmd *cobra.Command, args []string) {
+		cidRaw, _ := cmd.Flags().GetString("cid")
-		var cnr cid.ID
 
-		err := cnr.DecodeString(args[0])
+		var cnr cid.ID
+		err := cnr.DecodeString(cidRaw)
 		common.ExitOnErr(cmd, "Incorrect container arg: %v", err)
 
-		argsList := args[1:]
+		oidsRaw, _ := cmd.Flags().GetStringSlice("oid")
 
-		lockList := make([]oid.ID, len(argsList))
+		lockList := make([]oid.ID, len(oidsRaw))
 
-		for i := range argsList {
+		for i := range oidsRaw {
-			err = lockList[i].DecodeString(argsList[i])
+			err = lockList[i].DecodeString(oidsRaw[i])
 			common.ExitOnErr(cmd, fmt.Sprintf("Incorrect object arg #%d: %%v", i+1), err)
 		}
 
@@ -63,9 +63,11 @@ var objectLockCmd = &cobra.Command{
 			currEpoch, err := internalclient.GetCurrentEpoch(ctx, endpoint)
 			common.ExitOnErr(cmd, "Request current epoch: %w", err)
 
-			exp += currEpoch
+			exp = currEpoch + lifetime
 		}
 
+		common.PrintVerbose("Lock object will expire at %d epoch", exp)
+
 		var expirationAttr objectSDK.Attribute
 		expirationAttr.SetKey(objectV2.SysAttributeExpEpoch)
 		expirationAttr.SetValue(strconv.FormatUint(exp, 10))
@@ -94,7 +96,16 @@ func initCommandObjectLock() {
 	commonflags.Init(objectLockCmd)
 	initFlagSession(objectLockCmd, "PUT")
 
-	objectLockCmd.Flags().Uint64P(commonflags.ExpireAt, "e", 0, "Lock expiration epoch")
+	ff := objectLockCmd.Flags()
-	objectLockCmd.Flags().Uint64(commonflags.Lifetime, 0, "Lock lifetime")
+
+	ff.String("cid", "", "Container ID")
+	_ = objectLockCmd.MarkFlagRequired("cid")
+
+	ff.StringSlice("oid", nil, "Object ID")
+	_ = objectLockCmd.MarkFlagRequired("oid")
+
+	ff.Uint64P(commonflags.ExpireAt, "e", 0, "Lock expiration epoch")
+
+	ff.Uint64(commonflags.Lifetime, 0, "Lock lifetime")
 	objectLockCmd.MarkFlagsMutuallyExclusive(commonflags.ExpireAt, commonflags.Lifetime)
 }

cmd/neofs-cli/modules/object/util.go

@@ -208,6 +208,12 @@ func ReadOrOpenSessionViaClient(cmd *cobra.Command, dst SessionPrm, cli *client.
 	var objs []oid.ID
 	if obj != nil {
 		objs = []oid.ID{*obj}
+
+		if _, ok := dst.(*internal.DeleteObjectPrm); ok {
+			common.PrintVerbose("Collecting relatives of the removal object...")
+
+			objs = append(objs, collectObjectRelatives(cmd, cli, cnr, *obj)...)
+		}
 	}
 
 	finalizeSession(cmd, dst, tok, key, cnr, objs...)
@@ -328,6 +334,8 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 	prmHead.SetAddress(addrObj)
 	prmHead.SetRawFlag(true)
 
+	Prepare(cmd, &prmHead)
+
 	_, err := internal.HeadObject(prmHead)
 
 	var errSplit *object.SplitInfoError

cmd/neofs-node/config.go

@@ -29,6 +29,7 @@ import (
 	metricsconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/metrics"
 	nodeconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/node"
 	objectconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/object"
+	replicatorconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/replicator"
 	"github.com/nspcc-dev/neofs-node/pkg/core/container"
 	netmapCore "github.com/nspcc-dev/neofs-node/pkg/core/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
@@ -129,6 +130,7 @@ type shardCfg struct {
 		maxObjSize       uint64
 		flushWorkerCount int
 		sizeLimit        uint64
+		noSync           bool
 	}
 
 	piloramaCfg struct {
@@ -159,6 +161,7 @@ type subStorageCfg struct {
 	path   string
 	perm   fs.FileMode
 	depth  uint64
+	noSync bool
 
 	// blobovnicza-specific
 	size            uint64
@@ -218,6 +221,7 @@ func (a *applicationConfiguration) readConfig(c *config.Config) error {
 			wc.smallObjectSize = writeCacheCfg.SmallObjectSize()
 			wc.flushWorkerCount = writeCacheCfg.WorkersNumber()
 			wc.sizeLimit = writeCacheCfg.SizeLimit()
+			wc.noSync = writeCacheCfg.NoSync()
 		}
 
 		// blobstor with substorages
@@ -258,6 +262,7 @@ func (a *applicationConfiguration) readConfig(c *config.Config) error {
 			case fstree.Type:
 				sub := fstreeconfig.From((*config.Config)(storagesCfg[i]))
 				sCfg.depth = sub.Depth()
+				sCfg.noSync = sub.NoSync()
 			default:
 				return fmt.Errorf("invalid storage type: %s", storagesCfg[i].Type())
 			}
@@ -338,6 +343,7 @@ type shared struct {
 	persistate        *state.PersistentStorage
 
 	clientCache   *cache.ClientCache
+	bgClientCache *cache.ClientCache
 	localAddr     network.AddressGroup
 
 	key            *keys.PrivateKey
@@ -483,6 +489,8 @@ type cfgObjectRoutines struct {
 
 	putRemoteCapacity int
 
+	replicatorPoolSize int
+
 	replication *ants.Pool
 }
 
@@ -551,17 +559,20 @@ func initCfg(appCfg *config.Config) *cfg {
 		apiVersion:   version.Current(),
 		healthStatus: atomic.NewInt32(int32(control.HealthStatus_HEALTH_STATUS_UNDEFINED)),
 	}
+
+	cacheOpts := cache.ClientCacheOpts{
+		DialTimeout:   apiclientconfig.DialTimeout(appCfg),
+		StreamTimeout: apiclientconfig.StreamTimeout(appCfg),
+		Key:           &key.PrivateKey,
+		AllowExternal: apiclientconfig.AllowExternal(appCfg),
+	}
 	c.shared = shared{
 		key:           key,
 		binPublicKey:  key.PublicKey().Bytes(),
 		localAddr:     netAddr,
 		respSvc:       response.NewService(response.WithNetworkState(netState)),
-		clientCache: cache.NewSDKClientCache(cache.ClientCacheOpts{
+		clientCache:   cache.NewSDKClientCache(cacheOpts),
-			DialTimeout:   apiclientconfig.DialTimeout(appCfg),
+		bgClientCache: cache.NewSDKClientCache(cacheOpts),
-			StreamTimeout: apiclientconfig.StreamTimeout(appCfg),
-			Key:           &key.PrivateKey,
-			AllowExternal: apiclientconfig.AllowExternal(appCfg),
-		}),
 		persistate:    persistate,
 	}
 	c.cfgAccounting = cfgAccounting{
@@ -601,6 +612,7 @@ func initCfg(appCfg *config.Config) *cfg {
 	}
 
 	c.onShutdown(c.clientCache.CloseAll)   // clean up connections
+	c.onShutdown(c.bgClientCache.CloseAll) // clean up connections
 	c.onShutdown(func() { _ = c.persistate.Close() })
 
 	return c
@@ -642,7 +654,7 @@ func (c *cfg) shardOpts() []shardOptsWithID {
 				writecache.WithSmallObjectSize(wcRead.smallObjectSize),
 				writecache.WithFlushWorkersCount(wcRead.flushWorkerCount),
 				writecache.WithMaxCacheSize(wcRead.sizeLimit),
-
+				writecache.WithNoSync(wcRead.noSync),
 				writecache.WithLogger(c.log),
 			)
 		}
@@ -681,7 +693,8 @@ func (c *cfg) shardOpts() []shardOptsWithID {
 					Storage: fstree.New(
 						fstree.WithPath(sRead.path),
 						fstree.WithPerm(sRead.perm),
-						fstree.WithDepth(sRead.depth)),
+						fstree.WithDepth(sRead.depth),
+						fstree.WithNoSync(sRead.noSync)),
 					Policy: func(_ *objectSDK.Object, data []byte) bool {
 						return true
 					},
@@ -811,7 +824,12 @@ func initObjectPool(cfg *config.Config) (pool cfgObjectRoutines) {
 	pool.putRemote, err = ants.NewPool(pool.putRemoteCapacity, optNonBlocking)
 	fatalOnErr(err)
 
-	pool.replication, err = ants.NewPool(pool.putRemoteCapacity)
+	pool.replicatorPoolSize = replicatorconfig.PoolSize(cfg)
+	if pool.replicatorPoolSize <= 0 {
+		pool.replicatorPoolSize = pool.putRemoteCapacity
+	}
+
+	pool.replication, err = ants.NewPool(pool.replicatorPoolSize)
 	fatalOnErr(err)
 
 	return pool

cmd/neofs-node/config/engine/config_test.go

@@ -68,6 +68,7 @@ func TestEngineSection(t *testing.T) {
 				require.Equal(t, pl.MaxBatchSize(), 200)
 
 				require.Equal(t, false, wc.Enabled())
+				require.Equal(t, true, wc.NoSync())
 
 				require.Equal(t, "tmp/0/cache", wc.Path())
 				require.EqualValues(t, 16384, wc.SmallObjectSize())
@@ -95,7 +96,10 @@ func TestEngineSection(t *testing.T) {
 
 				require.Equal(t, "tmp/0/blob", ss[1].Path())
 				require.EqualValues(t, 0644, ss[1].Perm())
-				require.EqualValues(t, 5, fstreeconfig.From((*config.Config)(ss[1])).Depth())
+
+				fst := fstreeconfig.From((*config.Config)(ss[1]))
+				require.EqualValues(t, 5, fst.Depth())
+				require.Equal(t, false, fst.NoSync())
 
 				require.EqualValues(t, 150, gc.RemoverBatchSize())
 				require.Equal(t, 2*time.Minute, gc.RemoverSleepInterval())
@@ -110,6 +114,7 @@ func TestEngineSection(t *testing.T) {
 				require.Equal(t, 100, pl.MaxBatchSize())
 
 				require.Equal(t, true, wc.Enabled())
+				require.Equal(t, false, wc.NoSync())
 
 				require.Equal(t, "tmp/1/cache", wc.Path())
 				require.EqualValues(t, 16384, wc.SmallObjectSize())
@@ -137,7 +142,10 @@ func TestEngineSection(t *testing.T) {
 
 				require.Equal(t, "tmp/1/blob", ss[1].Path())
 				require.EqualValues(t, 0644, ss[1].Perm())
-				require.EqualValues(t, 5, fstreeconfig.From((*config.Config)(ss[1])).Depth())
+
+				fst := fstreeconfig.From((*config.Config)(ss[1]))
+				require.EqualValues(t, 5, fst.Depth())
+				require.Equal(t, true, fst.NoSync())
 
 				require.EqualValues(t, 200, gc.RemoverBatchSize())
 				require.Equal(t, 5*time.Minute, gc.RemoverSleepInterval())

cmd/neofs-node/config/engine/shard/blobstor/fstree/config.go

@@ -38,3 +38,10 @@ func (x *Config) Depth() uint64 {
 
 	return DepthDefault
 }
+
+// NoSync returns the value of "no_sync" config parameter.
+//
+// Returns false if the value is not a boolean or is missing.
+func (x *Config) NoSync() bool {
+	return config.BoolSafe((*config.Config)(x), "no_sync")
+}

cmd/neofs-node/config/engine/shard/writecache/config.go

@@ -115,6 +115,13 @@ func (x *Config) SizeLimit() uint64 {
 	return SizeLimitDefault
 }
 
+// NoSync returns the value of "no_sync" config parameter.
+//
+// Returns false if the value is not a boolean.
+func (x *Config) NoSync() bool {
+	return config.BoolSafe((*config.Config)(x), "no_sync")
+}
+
 // BoltDB returns config instance for querying bolt db specific parameters.
 func (x *Config) BoltDB() *boltdbconfig.Config {
 	return (*boltdbconfig.Config)(x)

cmd/neofs-node/config/replicator/config.go

@@ -25,3 +25,9 @@ func PutTimeout(c *config.Config) time.Duration {
 
 	return PutTimeoutDefault
 }
+
+// PoolSize returns the value of "pool_size" config parameter
+// from "replicator" section.
+func PoolSize(c *config.Config) int {
+	return int(config.IntSafe(c.Sub(subsection), "pool_size"))
+}

cmd/neofs-node/config/replicator/config_test.go

@@ -15,12 +15,14 @@ func TestReplicatorSection(t *testing.T) {
 		empty := configtest.EmptyConfig()
 
 		require.Equal(t, replicatorconfig.PutTimeoutDefault, replicatorconfig.PutTimeout(empty))
+		require.Equal(t, 0, replicatorconfig.PoolSize(empty))
 	})
 
 	const path = "../../../../config/example/node"
 
 	var fileConfigTest = func(c *config.Config) {
 		require.Equal(t, 15*time.Second, replicatorconfig.PutTimeout(c))
+		require.Equal(t, 10, replicatorconfig.PoolSize(c))
 	}
 
 	configtest.ForEachFileType(path, fileConfigTest)

cmd/neofs-node/container.go

@@ -162,7 +162,7 @@ func initContainerService(c *cfg) {
 			RemoteWriterProvider: &remoteLoadAnnounceProvider{
 				key:             &c.key.PrivateKey,
 				netmapKeys:      c,
-				clientCache:     c.clientCache,
+				clientCache:     c.bgClientCache,
 				deadEndProvider: loadcontroller.SimpleWriterProvider(loadAccumulator),
 			},
 			Builder: routeBuilder,

cmd/neofs-node/object.go

@@ -97,20 +97,6 @@ func (s *objectSvc) GetRangeHash(ctx context.Context, req *object.GetRangeHashRe
 	return s.get.GetRangeHash(ctx, req)
 }
 
-type localObjectInhumer struct {
-	storage *engine.StorageEngine
-
-	log *logger.Logger
-}
-
-func (r *localObjectInhumer) DeleteObjects(ts oid.Address, addr ...oid.Address) error {
-	var prm engine.InhumePrm
-	prm.WithTarget(ts, addr...)
-
-	_, err := r.storage.Inhume(prm)
-	return err
-}
-
 type delNetInfo struct {
 	netmap.State
 	tsLifetime uint64
@@ -185,10 +171,16 @@ func initObjectService(c *cfg) {
 		nmSrc:            c.netMapSource,
 		netState:         c.cfgNetmap.state,
 		trustStorage:     c.cfgReputation.localTrustStorage,
-		basicConstructor: c.clientCache,
+		basicConstructor: c.bgClientCache,
 	}
 
-	coreConstructor := (*coreClientConstructor)(clientConstructor)
+	coreConstructor := &coreClientConstructor{
+		log:              c.log,
+		nmSrc:            c.netMapSource,
+		netState:         c.cfgNetmap.state,
+		trustStorage:     c.cfgReputation.localTrustStorage,
+		basicConstructor: c.clientCache,
+	}
 
 	var irFetcher v2.InnerRingFetcher
 
@@ -202,11 +194,6 @@ func initObjectService(c *cfg) {
 		}
 	}
 
-	objInhumer := &localObjectInhumer{
-		storage: ls,
-		log:     c.log,
-	}
-
 	c.replicator = replicator.New(
 		replicator.WithLogger(c.log),
 		replicator.WithPutTimeout(
@@ -244,7 +231,7 @@ func initObjectService(c *cfg) {
 				)
 			}
 		}),
-		policer.WithMaxCapacity(c.cfgObject.pool.putRemoteCapacity),
+		policer.WithMaxCapacity(c.cfgObject.pool.replicatorPoolSize),
 		policer.WithPool(c.cfgObject.pool.replication),
 		policer.WithNodeLoader(c),
 	)
@@ -254,7 +241,7 @@ func initObjectService(c *cfg) {
 	c.workers = append(c.workers, pol)
 
 	var os putsvc.ObjectStorage = engineWithoutNotifications{
-		e: ls,
+		engine: ls,
 	}
 
 	if c.cfgNotifications.enabled {
@@ -274,10 +261,6 @@ func initObjectService(c *cfg) {
 		putsvc.WithContainerSource(c.cfgObject.cnrSource),
 		putsvc.WithNetworkMapSource(c.netMapSource),
 		putsvc.WithNetmapKeys(c),
-		putsvc.WithFormatValidatorOpts(
-			objectCore.WithDeleteHandler(objInhumer),
-			objectCore.WithLocker(ls),
-		),
 		putsvc.WithNetworkState(c.cfgNetmap.state),
 		putsvc.WithWorkerPools(c.cfgObject.pool.putRemote),
 		putsvc.WithLogger(c.log),
@@ -561,6 +544,14 @@ type engineWithNotifications struct {
 	defaultTopic string
 }
 
+func (e engineWithNotifications) Delete(tombstone oid.Address, toDelete []oid.ID) error {
+	return e.base.Delete(tombstone, toDelete)
+}
+
+func (e engineWithNotifications) Lock(locker oid.Address, toLock []oid.ID) error {
+	return e.base.Lock(locker, toLock)
+}
+
 func (e engineWithNotifications) Put(o *objectSDK.Object) error {
 	if err := e.base.Put(o); err != nil {
 		return err
@@ -583,9 +574,28 @@ func (e engineWithNotifications) Put(o *objectSDK.Object) error {
 }
 
 type engineWithoutNotifications struct {
-	e *engine.StorageEngine
+	engine *engine.StorageEngine
+}
+
+func (e engineWithoutNotifications) Delete(tombstone oid.Address, toDelete []oid.ID) error {
+	var prm engine.InhumePrm
+
+	addrs := make([]oid.Address, len(toDelete))
+	for i := range addrs {
+		addrs[i].SetContainer(tombstone.Container())
+		addrs[i].SetObject(toDelete[i])
+	}
+
+	prm.WithTarget(tombstone, addrs...)
+
+	_, err := e.engine.Inhume(prm)
+	return err
+}
+
+func (e engineWithoutNotifications) Lock(locker oid.Address, toLock []oid.ID) error {
+	return e.engine.Lock(locker.Container(), locker.Object(), toLock)
 }
 
 func (e engineWithoutNotifications) Put(o *objectSDK.Object) error {
-	return engine.Put(e.e, o)
+	return engine.Put(e.engine, o)
 }

cmd/neofs-node/reputation.go

@@ -95,7 +95,7 @@ func initReputationService(c *cfg) {
 		common.RemoteProviderPrm{
 			NetmapKeys:      c,
 			DeadEndProvider: daughterStorageWriterProvider,
-			ClientCache:     c.clientCache,
+			ClientCache:     c.bgClientCache,
 			WriterProvider: localreputation.NewRemoteProvider(
 				localreputation.RemoteProviderPrm{
 					Key: &c.key.PrivateKey,
@@ -110,7 +110,7 @@ func initReputationService(c *cfg) {
 		common.RemoteProviderPrm{
 			NetmapKeys:      c,
 			DeadEndProvider: consumerStorageWriterProvider,
-			ClientCache:     c.clientCache,
+			ClientCache:     c.bgClientCache,
 			WriterProvider: intermediatereputation.NewRemoteProvider(
 				intermediatereputation.RemoteProviderPrm{
 					Key: &c.key.PrivateKey,

cmd/neofs-node/tree.go

@@ -73,6 +73,7 @@ func initTreeService(c *cfg) {
 		ev := e.(containerEvent.DeleteSuccess)
 
 		// This is executed asynchronously, so we don't care about the operation taking some time.
+		c.log.Debug("removing all trees for container", zap.Stringer("cid", ev.ID))
 		err := c.treeService.DropTree(context.Background(), ev.ID, "")
 		if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
 			// Ignore pilorama.ErrTreeNotFound but other errors, including shard.ErrReadOnly, should be logged.

config/example/node.env

@@ -78,6 +78,7 @@ NEOFS_POLICER_HEAD_TIMEOUT=15s
 
 # Replicator section
 NEOFS_REPLICATOR_PUT_TIMEOUT=15s
+NEOFS_REPLICATOR_POOL_SIZE=10
 
 # Object service section
 NEOFS_OBJECT_PUT_POOL_SIZE_REMOTE=100
@@ -92,6 +93,7 @@ NEOFS_STORAGE_SHARD_0_RESYNC_METABASE=false
 NEOFS_STORAGE_SHARD_0_MODE=read-only
 ### Write cache config
 NEOFS_STORAGE_SHARD_0_WRITECACHE_ENABLED=false
+NEOFS_STORAGE_SHARD_0_WRITECACHE_NO_SYNC=true
 NEOFS_STORAGE_SHARD_0_WRITECACHE_PATH=tmp/0/cache
 NEOFS_STORAGE_SHARD_0_WRITECACHE_SMALL_OBJECT_SIZE=16384
 NEOFS_STORAGE_SHARD_0_WRITECACHE_MAX_OBJECT_SIZE=134217728
@@ -160,6 +162,7 @@ NEOFS_STORAGE_SHARD_1_BLOBSTOR_0_OPENED_CACHE_CAPACITY=50
 NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_TYPE=fstree
 NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_PATH=tmp/1/blob
 NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_PERM=0644
+NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_NO_SYNC=true
 NEOFS_STORAGE_SHARD_1_BLOBSTOR_1_DEPTH=5
 ### Pilorama config
 NEOFS_STORAGE_SHARD_1_PILORAMA_PATH="tmp/1/blob/pilorama.db"

config/example/node.json

@@ -121,6 +121,7 @@
     "head_timeout": "15s"
   },
   "replicator": {
+    "pool_size": 10,
     "put_timeout": "15s"
   },
   "object": {
@@ -137,6 +138,7 @@
         "resync_metabase": false,
         "writecache": {
           "enabled": false,
+          "no_sync": true,
           "path": "tmp/0/cache",
           "small_object_size": 16384,
           "max_object_size": 134217728,
@@ -214,6 +216,7 @@
           {
             "type": "fstree",
             "path": "tmp/1/blob",
+            "no_sync": true,
             "perm": "0644",
             "depth": 5
           }

config/example/node.yaml

@@ -101,6 +101,7 @@ policer:
 
 replicator:
   put_timeout: 15s  # timeout for the Replicator PUT remote operation
+  pool_size: 10     # maximum amount of concurrent replications
 
 object:
   put:
@@ -157,6 +158,7 @@ storage:
 
       writecache:
         enabled: false
+        no_sync: true
         path: tmp/0/cache  # write-cache root directory
         capacity: 3221225472  # approximate write-cache total size, bytes
 
@@ -198,6 +200,7 @@ storage:
           path: tmp/1/blob/blobovnicza
         - type: fstree
           path: tmp/1/blob  # blobstor path
+          no_sync: true
 
       pilorama:
         path: tmp/1/blob/pilorama.db

debian/neofs-ir.postinst

@@ -21,9 +21,12 @@ case "$1" in
         USERNAME=ir
         id -u neofs-ir >/dev/null 2>&1 || useradd -s /usr/sbin/nologin -d /var/lib/neofs/ir --system -M -U -c "NeoFS InnerRing node" neofs-ir
         if ! dpkg-statoverride --list /etc/neofs/$USERNAME >/dev/null; then
-            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME/*
+            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME
             chmod -f 0750 /etc/neofs/$USERNAME
-
+            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME/config.yml
+            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME/control.yml
+            chmod -f 0640 /etc/neofs/$USERNAME/config.yml || true
+            chmod -f 0640 /etc/neofs/$USERNAME/control.yml || true
         fi
         USERDIR=$(getent passwd "neofs-$USERNAME" | cut -d: -f6)
         if ! dpkg-statoverride --list neofs-$USERDIR >/dev/null; then

debian/neofs-storage.dirs

@@ -1,2 +1,3 @@
 /etc/neofs/storage
 /srv/neofs
+/var/lib/neofs/storage

debian/neofs-storage.postinst

@@ -19,15 +19,23 @@ set -e
 case "$1" in
     configure)
         USERNAME=storage
-        id -u neofs-storage >/dev/null 2>&1 || useradd -s /usr/sbin/nologin -d /srv/neofs --system -M -U -c "NeoFS Storage node" neofs-storage
+        id -u neofs-$USERNAME >/dev/null 2>&1 || useradd -s /usr/sbin/nologin -d /var/lib/neofs/$USERNAME --system -M -U -c "NeoFS Storage node" neofs-$USERNAME
         if ! dpkg-statoverride --list /etc/neofs/$USERNAME >/dev/null; then
-            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME/*
+            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME
             chmod -f 0750 /etc/neofs/$USERNAME
+            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME/config.yml
+            chown -f root:neofs-$USERNAME /etc/neofs/$USERNAME/control.yml
+            chmod -f 0640 /etc/neofs/$USERNAME/config.yml || true
+            chmod -f 0640 /etc/neofs/$USERNAME/control.yml || true
         fi
         USERDIR=$(getent passwd "neofs-$USERNAME" | cut -d: -f6)
         if ! dpkg-statoverride --list neofs-$USERDIR >/dev/null; then
             chown -f neofs-$USERNAME: $USERDIR
         fi
+        USERDIR=/srv/neofs
+        if ! dpkg-statoverride --list neofs-$USERDIR >/dev/null; then
+            chown -f neofs-$USERNAME: $USERDIR
+        fi
     ;;
 
     abort-upgrade|abort-remove|abort-deconfigure)

debian/neofs-storage.postrm

@@ -20,7 +20,7 @@ set -e
 
 case "$1" in
     purge)
-        rm -rf /srv/neofs/*
+        rm -rf /var/lib/neofs/storage/*
     ;;
 
     remove|upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)

docs/storage-node-configuration.md

@@ -170,47 +170,55 @@ Contains configuration for each shard. Keys must be consecutive numbers starting
 The following table describes configuration for each shard.
 
 | Parameter                           | Type                                        | Default value | Description                                                                                                                                                                                                       |
-|-------------------|---------------------------------------------|---------------|-----------------------------------------------------------------------------------------------------------|
+|-------------------------------------|---------------------------------------------|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `compress`                          | `bool`                                      | `false`       | Flag to enable compression.                                                                                                                                                                                       |
+| `compression_exclude_content_types` | `[]string`                                  |               | List of content-types to disable compression for. Content-type is taken from `Content-Type` object attribute. Each element can contain a star `*` as a first (last) character, which matches any prefix (suffix). |
 | `mode`                              | `string`                                    | `read-write`  | Shard Mode.<br/>Possible values:  `read-write`, `read-only`, `degraded`, `degraded-read-only`, `disabled`                                                                                                         |
 | `resync_metabase`                   | `bool`                                      | `false`       | Flag to enable metabase resync on start.                                                                                                                                                                          |
 | `writecache`                        | [Writecache config](#writecache-subsection) |               | Write-cache configuration.                                                                                                                                                                                        |
 | `metabase`                          | [Metabase config](#metabase-subsection)     |               | Metabase configuration.                                                                                                                                                                                           |
 | `blobstor`                          | [Blobstor config](#blobstor-subsection)     |               | Blobstor configuration.                                                                                                                                                                                           |
+| `small_object_size`                 | `size`                                      | `1M`          | Maximum size of an object stored in blobovnicza tree.                                                                                                                                                             |
 | `gc`                                | [GC config](#gc-subsection)                 |               | GC configuration.                                                                                                                                                                                                 |
 
 ### `blobstor` subsection
 
+Contains a list of substorages each with it's own type.
+Currently only 2 types are supported: `fstree` and `blobovnicza`.
+
 ```yaml
 blobstor:
+  - type: blobovnicza
     path: /path/to/blobstor
+    depth: 1
+    width: 4
+  - type: fstree
+    path: /path/to/blobstor/blobovnicza
     perm: 0644
-  compress: true
-  compression_exclude_content_types:
-    - audio/*
-    - video/*
-  depth: 5
-  small_object_size: 102400
-    blobovnicza:
     size: 4194304
     depth: 1
     width: 4
     opened_cache_capacity: 50
 ```
+
+#### Common options for sub-storages
 | Parameter                           | Type                                          | Default value | Description                                                                                                                                                                                                       |
 |-------------------------------------|-----------------------------------------------|---------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
 | `path`                              | `string`                                      |               | Path to the root of the blobstor.                                                                                                                                                                                 |
 | `perm`                              | file mode                                     | `0660`        | Default permission for created files and directories.                                                                                                                                                             |
-| `compress`                          | `bool`                                        | `false`       | Flag to enable compression.                                                                                                                                                                                       |
-| `compression_exclude_content_types` | `[]string`                                    |               | List of content-types to disable compression for. Content-type is taken from `Content-Type` object attribute. Each element can contain a star `*` as a first (last) character, which matches any prefix (suffix). |
-| `depth`                             | `int`                                         | `4`           | Depth of the file-system tree for large objects. Must be in range 1..31.                                                                                                                                          |
-| `small_object_size`                 | `size`                                        | `1M`          | Maximum size of an object stored in blobovnicza tree.                                                                                                                                                             |
-| `blobovnicza`                       | [Blobovnicza config](#blobovnicza-subsection) |               | Blobovnicza tree configuration.                                                                                                                                                                                   |
-
-#### `blobovnicza` subsection
 
+#### `fstree` type options
 | Parameter           | Type      | Default value | Description                                           |
-|-------------------------|----------|---------------|-------------------------------------------------------|
+|---------------------|-----------|---------------|-------------------------------------------------------|
-| `path`                  | `string` |               | Path to the root of the blobovnicza tree.             |
+| `path`              | `string`  |               | Path to the root of the blobstor.                     |
+| `perm`              | file mode | `0660`        | Default permission for created files and directories. |
+| `depth`             | `int`     | `4`           | File-system tree depth.                               |
+
+#### `blobovnicza` type options
+| Parameter               | Type      | Default value | Description                                           |
+|-------------------------|-----------|---------------|-------------------------------------------------------|
+| `path`                  | `string`  |               | Path to the root of the blobstor.                     |
+| `perm`                  | file mode | `0660`        | Default permission for created files and directories. |
 | `size`                  | `size`    | `1 G`         | Maximum size of a single blobovnicza                  |
 | `depth`                 | `int`     | `2`           | Blobovnicza tree depth.                               |
 | `width`                 | `int`     | `16`          | Blobovnicza tree width.                               |
@@ -396,11 +404,13 @@ Configuration for the Replicator service.
 ```yaml
 replicator:
   put_timeout: 15s
+  pool_size: 10
 ```
 
 | Parameter     | Type       | Default value                          | Description                                 |
-|---------------|------------|---------------|---------------------------------------------|
+|---------------|------------|----------------------------------------|---------------------------------------------|
 | `put_timeout` | `duration` | `5s`                                   | Timeout for performing the `PUT` operation. |
+| `pool_size`   | `int`      | Equal to `object.put.pool_size_remote` | Maximum amount of concurrent replications.  |
 
 # `object` section
 Contains pool sizes for object operations with remote nodes.

pkg/core/object/address.go

@@ -0,0 +1,13 @@
+package object
+
+import (
+	"github.com/nspcc-dev/neofs-sdk-go/object"
+	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
+)
+
+// AddressWithType groups object address with its NeoFS
+// object type.
+type AddressWithType struct {
+	Address oid.Address
+	Type    object.Type
+}

pkg/core/object/fmt.go

@@ -26,11 +26,7 @@ type FormatValidator struct {
 type FormatValidatorOption func(*cfg)
 
 type cfg struct {
-	deleteHandler DeleteHandler
-
 	netState netmap.State
-
-	locker Locker
 }
 
 // DeleteHandler is an interface of delete queue processor.
@@ -173,130 +169,141 @@ func (v *FormatValidator) checkOwnerKey(id user.ID, key neofsecdsa.PublicKey) er
 	return nil
 }
 
+// ContentMeta describes NeoFS meta information that brings object's payload if the object
+// is one of:
+//   - object.TypeTombstone;
+//   - object.TypeStorageGroup;
+//   - object.TypeLock.
+type ContentMeta struct {
+	typ object.Type
+
+	objs []oid.ID
+}
+
+// Type returns object's type.
+func (i ContentMeta) Type() object.Type {
+	return i.typ
+}
+
+// Objects returns objects that the original object's payload affects:
+//   - inhumed objects, if the original object is a Tombstone;
+//   - locked objects, if the original object is a Lock;
+//   - members of a storage group, if the original object is a Storage group;
+//   - nil, if the original object is a Regular object.
+func (i ContentMeta) Objects() []oid.ID {
+	return i.objs
+}
+
 // ValidateContent validates payload content according to the object type.
-func (v *FormatValidator) ValidateContent(o *object.Object) error {
+func (v *FormatValidator) ValidateContent(o *object.Object) (ContentMeta, error) {
+	meta := ContentMeta{
+		typ: o.Type(),
+	}
+
 	switch o.Type() {
 	case object.TypeRegular:
 		// ignore regular objects, they do not need payload formatting
 	case object.TypeTombstone:
 		if len(o.Payload()) == 0 {
-			return fmt.Errorf("(%T) empty payload in tombstone", v)
+			return ContentMeta{}, fmt.Errorf("(%T) empty payload in tombstone", v)
 		}
 
 		tombstone := object.NewTombstone()
 
 		if err := tombstone.Unmarshal(o.Payload()); err != nil {
-			return fmt.Errorf("(%T) could not unmarshal tombstone content: %w", v, err)
+			return ContentMeta{}, fmt.Errorf("(%T) could not unmarshal tombstone content: %w", v, err)
 		}
 
 		// check if the tombstone has the same expiration in the body and the header
 		exp, err := expirationEpochAttribute(o)
 		if err != nil {
-			return err
+			return ContentMeta{}, err
 		}
 
 		if exp != tombstone.ExpirationEpoch() {
-			return errTombstoneExpiration
+			return ContentMeta{}, errTombstoneExpiration
 		}
 
 		// mark all objects from the tombstone body as removed in the storage engine
-		cnr, ok := o.ContainerID()
+		_, ok := o.ContainerID()
 		if !ok {
-			return errors.New("missing container ID")
+			return ContentMeta{}, errors.New("missing container ID")
 		}
 
 		idList := tombstone.Members()
-		addrList := make([]oid.Address, len(idList))
+		meta.objs = idList
-
-		for i := range idList {
-			addrList[i].SetContainer(cnr)
-			addrList[i].SetObject(idList[i])
-		}
-
-		if v.deleteHandler != nil {
-			err = v.deleteHandler.DeleteObjects(AddressOf(o), addrList...)
-			if err != nil {
-				return fmt.Errorf("delete objects from %s object content: %w", o.Type(), err)
-			}
-		}
 	case object.TypeStorageGroup:
 		if len(o.Payload()) == 0 {
-			return fmt.Errorf("(%T) empty payload in SG", v)
+			return ContentMeta{}, fmt.Errorf("(%T) empty payload in SG", v)
 		}
 
 		var sg storagegroup.StorageGroup
 
 		if err := sg.Unmarshal(o.Payload()); err != nil {
-			return fmt.Errorf("(%T) could not unmarshal SG content: %w", v, err)
+			return ContentMeta{}, fmt.Errorf("(%T) could not unmarshal SG content: %w", v, err)
 		}
 
 		mm := sg.Members()
+		meta.objs = mm
+
 		lenMM := len(mm)
 		if lenMM == 0 {
-			return errEmptySGMembers
+			return ContentMeta{}, errEmptySGMembers
 		}
 
 		uniqueFilter := make(map[oid.ID]struct{}, lenMM)
 
 		for i := 0; i < lenMM; i++ {
 			if _, alreadySeen := uniqueFilter[mm[i]]; alreadySeen {
-				return fmt.Errorf("storage group contains non-unique member: %s", mm[i])
+				return ContentMeta{}, fmt.Errorf("storage group contains non-unique member: %s", mm[i])
 			}
 
 			uniqueFilter[mm[i]] = struct{}{}
 		}
 	case object.TypeLock:
 		if len(o.Payload()) == 0 {
-			return errors.New("empty payload in lock")
+			return ContentMeta{}, errors.New("empty payload in lock")
 		}
 
-		cnr, ok := o.ContainerID()
+		_, ok := o.ContainerID()
 		if !ok {
-			return errors.New("missing container")
+			return ContentMeta{}, errors.New("missing container")
 		}
 
-		id, ok := o.ID()
+		_, ok = o.ID()
 		if !ok {
-			return errors.New("missing ID")
+			return ContentMeta{}, errors.New("missing ID")
 		}
 
 		// check that LOCK object has correct expiration epoch
 		lockExp, err := expirationEpochAttribute(o)
 		if err != nil {
-			return fmt.Errorf("lock object expiration epoch: %w", err)
+			return ContentMeta{}, fmt.Errorf("lock object expiration epoch: %w", err)
 		}
 
 		if currEpoch := v.netState.CurrentEpoch(); lockExp < currEpoch {
-			return fmt.Errorf("lock object expiration: %d; current: %d", lockExp, currEpoch)
+			return ContentMeta{}, fmt.Errorf("lock object expiration: %d; current: %d", lockExp, currEpoch)
 		}
 
 		var lock object.Lock
 
 		err = lock.Unmarshal(o.Payload())
 		if err != nil {
-			return fmt.Errorf("decode lock payload: %w", err)
+			return ContentMeta{}, fmt.Errorf("decode lock payload: %w", err)
 		}
 
-		if v.locker != nil {
 		num := lock.NumberOfMembers()
 		if num == 0 {
-				return errors.New("missing locked members")
+			return ContentMeta{}, errors.New("missing locked members")
 		}
 
-			// mark all objects from lock list as locked in the storage engine
+		meta.objs = make([]oid.ID, num)
-			locklist := make([]oid.ID, num)
+		lock.ReadMembers(meta.objs)
-			lock.ReadMembers(locklist)
-
-			err = v.locker.Lock(cnr, id, locklist)
-			if err != nil {
-				return fmt.Errorf("lock objects from %s object content: %w", o.Type(), err)
-			}
-		}
 	default:
 		// ignore all other object types, they do not need payload formatting
 	}
 
-	return nil
+	return meta, nil
 }
 
 var errExpired = errors.New("object has expired")
@@ -373,17 +380,3 @@ func WithNetState(netState netmap.State) FormatValidatorOption {
 		c.netState = netState
 	}
 }
-
-// WithDeleteHandler returns an option to set delete queue processor.
-func WithDeleteHandler(v DeleteHandler) FormatValidatorOption {
-	return func(c *cfg) {
-		c.deleteHandler = v
-	}
-}
-
-// WithLocker returns an option to set object lock storage.
-func WithLocker(v Locker) FormatValidatorOption {
-	return func(c *cfg) {
-		c.locker = v
-	}
-}

pkg/core/object/fmt_test.go

@@ -2,8 +2,6 @@ package object
 
 import (
 	"crypto/ecdsa"
-	"crypto/rand"
-	"crypto/sha256"
 	"strconv"
 	"testing"
 
@@ -19,15 +17,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func testSHA(t *testing.T) [sha256.Size]byte {
-	cs := [sha256.Size]byte{}
-
-	_, err := rand.Read(cs[:])
-	require.NoError(t, err)
-
-	return cs
-}
-
 func blankValidObject(key *ecdsa.PrivateKey) *object.Object {
 	var idOwner user.ID
 	user.IDFromKey(&idOwner, key.PublicKey)
@@ -89,7 +78,8 @@ func TestFormatValidator_Validate(t *testing.T) {
 		user.IDFromKey(&idOwner, ownerKey.PrivateKey.PublicKey)
 
 		tok := sessiontest.Object()
-		tok.Sign(ownerKey.PrivateKey)
+		err := tok.Sign(ownerKey.PrivateKey)
+		require.NoError(t, err)
 
 		obj := object.New()
 		obj.SetContainerID(cidtest.ID())
@@ -114,7 +104,8 @@ func TestFormatValidator_Validate(t *testing.T) {
 		obj.SetType(object.TypeTombstone)
 		obj.SetContainerID(cidtest.ID())
 
-		require.Error(t, v.ValidateContent(obj)) // no tombstone content
+		_, err := v.ValidateContent(obj)
+		require.Error(t, err) // no tombstone content
 
 		content := object.NewTombstone()
 		content.SetMembers([]oid.ID{oidtest.ID()})
@@ -124,7 +115,8 @@ func TestFormatValidator_Validate(t *testing.T) {
 
 		obj.SetPayload(data)
 
-		require.Error(t, v.ValidateContent(obj)) // no members in tombstone
+		_, err = v.ValidateContent(obj)
+		require.Error(t, err) // no members in tombstone
 
 		content.SetMembers([]oid.ID{oidtest.ID()})
 
@@ -133,7 +125,8 @@ func TestFormatValidator_Validate(t *testing.T) {
 
 		obj.SetPayload(data)
 
-		require.Error(t, v.ValidateContent(obj)) // no expiration epoch in tombstone
+		_, err = v.ValidateContent(obj)
+		require.Error(t, err) // no expiration epoch in tombstone
 
 		var expirationAttribute object.Attribute
 		expirationAttribute.SetKey(objectV2.SysAttributeExpEpoch)
@@ -141,15 +134,23 @@ func TestFormatValidator_Validate(t *testing.T) {
 
 		obj.SetAttributes(expirationAttribute)
 
-		require.Error(t, v.ValidateContent(obj)) // different expiration values
+		_, err = v.ValidateContent(obj)
+		require.Error(t, err) // different expiration values
+
+		id := oidtest.ID()
 
 		content.SetExpirationEpoch(10)
+		content.SetMembers([]oid.ID{id})
 		data, err = content.Marshal()
 		require.NoError(t, err)
 
 		obj.SetPayload(data)
 
-		require.NoError(t, v.ValidateContent(obj)) // all good
+		contentGot, err := v.ValidateContent(obj)
+		require.NoError(t, err) // all good
+
+		require.EqualValues(t, []oid.ID{id}, contentGot.Objects())
+		require.Equal(t, object.TypeTombstone, contentGot.Type())
 	})
 
 	t.Run("storage group content", func(t *testing.T) {
@@ -157,7 +158,8 @@ func TestFormatValidator_Validate(t *testing.T) {
 		obj.SetType(object.TypeStorageGroup)
 
 		t.Run("empty payload", func(t *testing.T) {
-			require.Error(t, v.ValidateContent(obj))
+			_, err := v.ValidateContent(obj)
+			require.Error(t, err)
 		})
 
 		var content storagegroup.StorageGroup
@@ -168,7 +170,9 @@ func TestFormatValidator_Validate(t *testing.T) {
 			require.NoError(t, err)
 
 			obj.SetPayload(data)
-			require.ErrorIs(t, v.ValidateContent(obj), errEmptySGMembers)
+
+			_, err = v.ValidateContent(obj)
+			require.ErrorIs(t, err, errEmptySGMembers)
 		})
 
 		t.Run("non-unique members", func(t *testing.T) {
@@ -180,17 +184,25 @@ func TestFormatValidator_Validate(t *testing.T) {
 			require.NoError(t, err)
 
 			obj.SetPayload(data)
-			require.Error(t, v.ValidateContent(obj))
+
+			_, err = v.ValidateContent(obj)
+			require.Error(t, err)
 		})
 
 		t.Run("correct SG", func(t *testing.T) {
-			content.SetMembers([]oid.ID{oidtest.ID(), oidtest.ID()})
+			ids := []oid.ID{oidtest.ID(), oidtest.ID()}
+			content.SetMembers(ids)
 
 			data, err := content.Marshal()
 			require.NoError(t, err)
 
 			obj.SetPayload(data)
-			require.NoError(t, v.ValidateContent(obj))
+
+			content, err := v.ValidateContent(obj)
+			require.NoError(t, err)
+
+			require.EqualValues(t, ids, content.Objects())
+			require.Equal(t, object.TypeStorageGroup, content.Type())
 		})
 	})
 

pkg/innerring/internal/client/client.go

@@ -202,6 +202,7 @@ func (x Client) HeadObject(prm HeadObjectPrm) (*HeadObjectRes, error) {
 
 	cliPrm.FromContainer(prm.objAddr.Container())
 	cliPrm.ByID(prm.objAddr.Object())
+	cliPrm.UseKey(*x.key)
 
 	cliRes, err := x.c.ObjectHead(prm.ctx, cliPrm)
 	if err == nil {

pkg/innerring/rpc.go

@@ -47,7 +47,7 @@ type (
 func newClientCache(p *clientCacheParams) *ClientCache {
 	return &ClientCache{
 		log:          p.Log,
-		cache:        cache.NewSDKClientCache(cache.ClientCacheOpts{AllowExternal: p.AllowExternal}),
+		cache:        cache.NewSDKClientCache(cache.ClientCacheOpts{AllowExternal: p.AllowExternal, Key: p.Key}),
 		key:          p.Key,
 		sgTimeout:    p.SGTimeout,
 		headTimeout:  p.HeadTimeout,

pkg/local_object_storage/blobovnicza/put.go

@@ -1,9 +1,9 @@
 package blobovnicza
 
 import (
-	"errors"
 	"fmt"
 
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/util/logicerr"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"go.etcd.io/bbolt"
 )
@@ -21,7 +21,7 @@ type PutRes struct {
 
 // ErrFull is returned when trying to save an
 // object to a filled blobovnicza.
-var ErrFull = errors.New("blobovnicza is full")
+var ErrFull = logicerr.New("blobovnicza is full")
 
 // SetAddress sets the address of the saving object.
 func (p *PutPrm) SetAddress(addr oid.Address) {
@@ -62,7 +62,7 @@ func (b *Blobovnicza) Put(prm PutPrm) (PutRes, error) {
 			// expected to happen:
 			//  - before initialization step (incorrect usage by design)
 			//  - if DB is corrupted (in future this case should be handled)
-			return fmt.Errorf("(%T) bucket for size %d not created", b, sz)
+			return logicerr.Wrap(fmt.Errorf("(%T) bucket for size %d not created", b, sz))
 		}
 
 		// save the object in bucket

pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go

@@ -12,6 +12,7 @@ import (
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobovnicza"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/compression"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/util/logicerr"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"go.uber.org/zap"
 )
@@ -157,7 +158,7 @@ func (b *Blobovniczas) updateAndGet(p string, old *uint64) (blobovniczaWithIndex
 	if ok {
 		if old != nil {
 			if active.ind == b.blzShallowWidth-1 {
-				return active, errors.New("no more Blobovniczas")
+				return active, logicerr.New("no more Blobovniczas")
 			} else if active.ind != *old {
 				// sort of CAS in order to control concurrent
 				// updateActive calls
@@ -246,3 +247,8 @@ func (b *Blobovniczas) Path() string {
 func (b *Blobovniczas) SetCompressor(cc *compression.Config) {
 	b.compression = cc
 }
+
+// SetReportErrorFunc implements common.Storage.
+func (b *Blobovniczas) SetReportErrorFunc(f func(string, error)) {
+	b.reportError = f
+}

pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza_test.go

@@ -1,165 +0,0 @@
-package blobovniczatree
-
-import (
-	"math"
-	"math/rand"
-	"os"
-	"strconv"
-	"strings"
-	"testing"
-
-	"github.com/nspcc-dev/neofs-node/pkg/core/object"
-	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
-	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/internal/blobstortest"
-	"github.com/nspcc-dev/neofs-node/pkg/util/logger"
-	"github.com/nspcc-dev/neofs-node/pkg/util/logger/test"
-	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
-	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
-	"github.com/stretchr/testify/require"
-	"go.uber.org/zap/zaptest"
-)
-
-func TestOpenedAndActive(t *testing.T) {
-	rand.Seed(1024)
-
-	l := test.NewLogger(true)
-	p, err := os.MkdirTemp("", "*")
-	require.NoError(t, err)
-
-	const (
-		width  = 2
-		depth  = 1
-		dbSize = 64 * 1024
-	)
-
-	b := NewBlobovniczaTree(
-		WithLogger(l),
-		WithObjectSizeLimit(2048),
-		WithBlobovniczaShallowWidth(width),
-		WithBlobovniczaShallowDepth(depth),
-		WithRootPath(p),
-		WithOpenedCacheSize(1),
-		WithBlobovniczaSize(dbSize))
-
-	defer os.RemoveAll(p)
-
-	require.NoError(t, b.Open(false))
-	require.NoError(t, b.Init())
-
-	type pair struct {
-		obj *objectSDK.Object
-		sid []byte
-	}
-
-	objects := make([]pair, 10)
-	for i := range objects {
-		var prm common.PutPrm
-		prm.Object = blobstortest.NewObject(1024)
-		prm.Address = object.AddressOf(prm.Object)
-		prm.RawData, err = prm.Object.Marshal()
-		require.NoError(t, err)
-
-		res, err := b.Put(prm)
-		require.NoError(t, err)
-
-		objects[i].obj = prm.Object
-		objects[i].sid = res.StorageID
-	}
-	for i := range objects {
-		var prm common.GetPrm
-		prm.Address = object.AddressOf(objects[i].obj)
-		// It is important to provide StorageID because
-		// we want to open a single blobovnicza, without other
-		// unpredictable cache effects.
-		prm.StorageID = objects[i].sid
-
-		_, err := b.Get(prm)
-		require.NoError(t, err)
-	}
-	require.NoError(t, b.Close())
-}
-
-func TestBlobovniczas(t *testing.T) {
-	rand.Seed(1024)
-
-	l := test.NewLogger(false)
-	p, err := os.MkdirTemp("", "*")
-	require.NoError(t, err)
-
-	var width, depth uint64 = 2, 2
-
-	// sizeLim must be big enough, to hold at least multiple pages.
-	// 32 KiB is the initial size after all by-size buckets are created.
-	var szLim uint64 = 32*1024 + 1
-
-	b := NewBlobovniczaTree(
-		WithLogger(l),
-		WithObjectSizeLimit(szLim),
-		WithBlobovniczaShallowWidth(width),
-		WithBlobovniczaShallowDepth(depth),
-		WithRootPath(p),
-		WithBlobovniczaSize(szLim))
-
-	defer os.RemoveAll(p)
-
-	require.NoError(t, b.Init())
-
-	objSz := uint64(szLim / 2)
-
-	addrList := make([]oid.Address, 0)
-	minFitObjNum := width * depth * szLim / objSz
-
-	for i := uint64(0); i < minFitObjNum; i++ {
-		obj := blobstortest.NewObject(objSz)
-		addr := object.AddressOf(obj)
-
-		addrList = append(addrList, addr)
-
-		d, err := obj.Marshal()
-		require.NoError(t, err)
-
-		// save object in blobovnicza
-		_, err = b.Put(common.PutPrm{Address: addr, RawData: d})
-		require.NoError(t, err, i)
-	}
-}
-
-func TestFillOrder(t *testing.T) {
-	for _, depth := range []uint64{1, 2, 4} {
-		t.Run("depth="+strconv.FormatUint(depth, 10), func(t *testing.T) {
-			testFillOrder(t, depth)
-		})
-	}
-}
-
-func testFillOrder(t *testing.T, depth uint64) {
-	p, err := os.MkdirTemp("", "*")
-	require.NoError(t, err)
-	b := NewBlobovniczaTree(
-		WithLogger(&logger.Logger{Logger: zaptest.NewLogger(t)}),
-		WithObjectSizeLimit(2048),
-		WithBlobovniczaShallowWidth(3),
-		WithBlobovniczaShallowDepth(depth),
-		WithRootPath(p),
-		WithBlobovniczaSize(1024*1024)) // big enough for some objects.
-	require.NoError(t, b.Open(false))
-	require.NoError(t, b.Init())
-	t.Cleanup(func() {
-		b.Close()
-	})
-
-	objCount := 10 /* ~ objects per blobovnicza */ *
-		int(math.Pow(3, float64(depth)-1)) /* blobovniczas on a previous to last level */
-
-	for i := 0; i < objCount; i++ {
-		obj := blobstortest.NewObject(1024)
-		addr := object.AddressOf(obj)
-
-		d, err := obj.Marshal()
-		require.NoError(t, err)
-
-		res, err := b.Put(common.PutPrm{Address: addr, RawData: d, DontCompress: true})
-		require.NoError(t, err, i)
-		require.True(t, strings.HasSuffix(string(res.StorageID), "/0"))
-	}
-}

pkg/local_object_storage/blobstor/blobovniczatree/errors.go

@@ -3,9 +3,14 @@ package blobovniczatree
 import (
 	"errors"
 
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/util/logicerr"
 	apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
 )
 
 func isErrOutOfRange(err error) bool {
 	return errors.As(err, new(apistatus.ObjectOutOfRange))
 }
+
+func isLogical(err error) bool {
+	return errors.As(err, new(logicerr.Logical))
+}

pkg/local_object_storage/blobstor/blobovniczatree/option.go

@@ -19,6 +19,8 @@ type cfg struct {
 	blzShallowWidth uint64
 	compression     *compression.Config
 	blzOpts         []blobovnicza.Option
+	// reportError is the function called when encountering disk errors.
+	reportError func(string, error)
 }
 
 type Option func(*cfg)
@@ -37,6 +39,7 @@ func initConfig(c *cfg) {
 		openedCacheSize: defaultOpenedCacheSize,
 		blzShallowDepth: defaultBlzShallowDepth,
 		blzShallowWidth: defaultBlzShallowWidth,
+		reportError:     func(string, error) {},
 	}
 }
 

pkg/local_object_storage/blobstor/blobovniczatree/put.go

@@ -34,9 +34,12 @@ func (b *Blobovniczas) Put(prm common.PutPrm) (common.PutRes, error) {
 	fn = func(p string) (bool, error) {
 		active, err := b.getActivated(p)
 		if err != nil {
+			if !isLogical(err) {
+				b.reportError("could not get active blobovnicza", err)
+			} else {
 				b.log.Debug("could not get active blobovnicza",
-				zap.String("error", err.Error()),
+					zap.String("error", err.Error()))
-			)
+			}
 
 			return false, nil
 		}
@@ -49,10 +52,13 @@ func (b *Blobovniczas) Put(prm common.PutPrm) (common.PutRes, error) {
 				)
 
 				if err := b.updateActive(p, &active.ind); err != nil {
+					if !isLogical(err) {
+						b.reportError("could not update active blobovnicza", err)
+					} else {
 						b.log.Debug("could not update active blobovnicza",
 							zap.String("level", p),
-						zap.String("error", err.Error()),
+							zap.String("error", err.Error()))
-					)
+					}
 
 					return false, nil
 				}
@@ -61,10 +67,13 @@ func (b *Blobovniczas) Put(prm common.PutPrm) (common.PutRes, error) {
 			}
 
 			allFull = false
+			if !isLogical(err) {
+				b.reportError("could not put object to active blobovnicza", err)
+			} else {
 				b.log.Debug("could not put object to active blobovnicza",
 					zap.String("path", filepath.Join(p, u64ToHexString(active.ind))),
-				zap.String("error", err.Error()),
+					zap.String("error", err.Error()))
-			)
+			}
 
 			return false, nil
 		}

pkg/local_object_storage/blobstor/blobstor.go

@@ -105,3 +105,11 @@ func WithUncompressableContentTypes(values []string) Option {
 		c.compression.UncompressableContentTypes = values
 	}
 }
+
+// SetReportErrorFunc allows to provide a function to be called on disk errors.
+// This function MUST be called before Open.
+func (b *BlobStor) SetReportErrorFunc(f func(string, error)) {
+	for i := range b.storage {
+		b.storage[i].Storage.SetReportErrorFunc(f)
+	}
+}

pkg/local_object_storage/blobstor/common/storage.go

@@ -12,6 +12,9 @@ type Storage interface {
 	Type() string
 	Path() string
 	SetCompressor(cc *compression.Config)
+	// SetReportErrorFunc allows to provide a function to be called on disk errors.
+	// This function MUST be called before Open.
+	SetReportErrorFunc(f func(string, error))
 
 	Get(GetPrm) (GetRes, error)
 	GetRange(GetRangePrm) (GetRangeRes, error)

pkg/local_object_storage/blobstor/delete.go

@@ -8,6 +8,9 @@ import (
 )
 
 func (b *BlobStor) Delete(prm common.DeletePrm) (common.DeleteRes, error) {
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
 	if prm.StorageID == nil {
 		for i := range b.storage {
 			res, err := b.storage[i].Storage.Delete(prm)

pkg/local_object_storage/blobstor/exists.go

@@ -10,6 +10,9 @@ import (
 // Returns any error encountered that did not allow
 // to completely check object existence.
 func (b *BlobStor) Exists(prm common.ExistsPrm) (common.ExistsRes, error) {
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
 	// If there was an error during existence check below,
 	// it will be returned unless object was found in blobovnicza.
 	// Otherwise, it is logged and the latest error is returned.

pkg/local_object_storage/blobstor/fstree/fstree.go

@@ -28,6 +28,7 @@ type FSTree struct {
 	Depth      uint64
 	DirNameLen int
 
+	noSync   bool
 	readOnly bool
 }
 
@@ -238,16 +239,39 @@ func (t *FSTree) Put(prm common.PutPrm) (common.PutRes, error) {
 		prm.RawData = t.Compress(prm.RawData)
 	}
 
-	err := os.WriteFile(p, prm.RawData, t.Permissions)
+	err := t.writeFile(p, prm.RawData)
 	if err != nil {
 		var pe *fs.PathError
 		if errors.As(err, &pe) && pe.Err == syscall.ENOSPC {
 			err = common.ErrNoSpace
 		}
 	}
+
 	return common.PutRes{StorageID: []byte{}}, err
 }
 
+func (t *FSTree) writeFlags() int {
+	flags := os.O_WRONLY | os.O_CREATE | os.O_TRUNC
+	if t.noSync {
+		return flags
+	}
+	return flags | os.O_SYNC
+}
+
+// writeFile writes data to a file with path p.
+// The code is copied from `os.WriteFile` with minor corrections for flags.
+func (t *FSTree) writeFile(p string, data []byte) error {
+	f, err := os.OpenFile(p, t.writeFlags(), t.Permissions)
+	if err != nil {
+		return err
+	}
+	_, err = f.Write(data)
+	if err1 := f.Close(); err1 != nil && err == nil {
+		err = err1
+	}
+	return err
+}
+
 // PutStream puts executes handler on a file opened for write.
 func (t *FSTree) PutStream(addr oid.Address, handler func(*os.File) error) error {
 	if t.readOnly {
@@ -260,7 +284,7 @@ func (t *FSTree) PutStream(addr oid.Address, handler func(*os.File) error) error
 		return err
 	}
 
-	f, err := os.OpenFile(p, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, t.Permissions)
+	f, err := os.OpenFile(p, t.writeFlags(), t.Permissions)
 	if err != nil {
 		return err
 	}
@@ -355,3 +379,8 @@ func (t *FSTree) Path() string {
 func (t *FSTree) SetCompressor(cc *compression.Config) {
 	t.Config = cc
 }
+
+// SetReportErrorFunc implements common.Storage.
+func (t *FSTree) SetReportErrorFunc(f func(string, error)) {
+	// Do nothing, FSTree can encounter only one error which is returned.
+}

pkg/local_object_storage/blobstor/fstree/option.go

@@ -29,3 +29,9 @@ func WithPath(p string) Option {
 		f.RootPath = p
 	}
 }
+
+func WithNoSync(noSync bool) Option {
+	return func(f *FSTree) {
+		f.noSync = noSync
+	}
+}

pkg/local_object_storage/blobstor/get.go

@@ -12,6 +12,9 @@ import (
 // If the descriptor is present, only one sub-storage is tried,
 // Otherwise, each sub-storage is tried in order.
 func (b *BlobStor) Get(prm common.GetPrm) (common.GetRes, error) {
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
 	if prm.StorageID == nil {
 		for i := range b.storage {
 			res, err := b.storage[i].Storage.Get(prm)

pkg/local_object_storage/blobstor/get_range.go

@@ -12,6 +12,9 @@ import (
 // If the descriptor is present, only one sub-storage is tried,
 // Otherwise, each sub-storage is tried in order.
 func (b *BlobStor) GetRange(prm common.GetRangePrm) (common.GetRangeRes, error) {
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
 	if prm.StorageID == nil {
 		for i := range b.storage {
 			res, err := b.storage[i].Storage.GetRange(prm)

pkg/local_object_storage/blobstor/info.go

@@ -2,6 +2,9 @@ package blobstor
 
 // DumpInfo returns information about blob stor.
 func (b *BlobStor) DumpInfo() Info {
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
 	sub := make([]SubStorageInfo, len(b.storage))
 	for i := range b.storage {
 		sub[i].Path = b.storage[i].Storage.Path()

pkg/local_object_storage/blobstor/iterate.go

@@ -16,6 +16,9 @@ import (
 //
 // If handler returns an error, method wraps and returns it immediately.
 func (b *BlobStor) Iterate(prm common.IteratePrm) (common.IterateRes, error) {
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
 	for i := range b.storage {
 		_, err := b.storage[i].Storage.Iterate(prm)
 		if err != nil && !prm.IgnoreErrors {

pkg/local_object_storage/blobstor/put.go

@@ -22,6 +22,9 @@ var ErrNoPlaceFound = logicerr.New("couldn't find a place to store an object")
 // Returns any error encountered that
 // did not allow to completely save the object.
 func (b *BlobStor) Put(prm common.PutPrm) (common.PutRes, error) {
+	b.modeMtx.RLock()
+	defer b.modeMtx.RUnlock()
+
 	if prm.Object != nil {
 		prm.Address = object.AddressOf(prm.Object)
 	}

pkg/local_object_storage/engine/control.go

@@ -92,6 +92,9 @@ func (e *StorageEngine) Init() error {
 		return errors.New("failed initialization on all shards")
 	}
 
+	e.wg.Add(1)
+	go e.setModeLoop()
+
 	return nil
 }
 
@@ -100,8 +103,10 @@ var errClosed = errors.New("storage engine is closed")
 // Close releases all StorageEngine's components. Waits for all data-related operations to complete.
 // After the call, all the next ones will fail.
 //
-// The method is supposed to be called when the application exits.
+// The method MUST only be called when the application exits.
 func (e *StorageEngine) Close() error {
+	close(e.closeCh)
+	defer e.wg.Wait()
 	return e.setBlockExecErr(errClosed)
 }
 

pkg/local_object_storage/engine/control_test.go

@@ -20,7 +20,6 @@ import (
 func TestExecBlocks(t *testing.T) {
 	e := testNewEngineWithShardNum(t, 2) // number doesn't matter in this test, 2 is several but not many
 	t.Cleanup(func() {
-		e.Close()
 		os.RemoveAll(t.Name())
 	})
 

pkg/local_object_storage/engine/engine.go

@@ -23,6 +23,10 @@ type StorageEngine struct {
 
 	shardPools map[string]util.WorkerPool
 
+	closeCh   chan struct{}
+	setModeCh chan setModeRequest
+	wg        sync.WaitGroup
+
 	blockExec struct {
 		mtx sync.RWMutex
 
@@ -35,33 +39,51 @@ type shardWrapper struct {
 	*shard.Shard
 }
 
-// reportShardError checks that the amount of errors doesn't exceed the configured threshold.
+type setModeRequest struct {
-// If it does, shard is set to read-only mode.
+	sh         *shard.Shard
-func (e *StorageEngine) reportShardError(
+	errorCount uint32
-	sh hashedShard,
-	msg string,
-	err error,
-	fields ...zap.Field) {
-	if isLogical(err) {
-		e.log.Warn(msg,
-			zap.Stringer("shard_id", sh.ID()),
-			zap.String("error", err.Error()))
-		return
 }
 
+// setModeLoop listens setModeCh to perform degraded mode transition of a single shard.
+// Instead of creating a worker per single shard we use a single goroutine.
+func (e *StorageEngine) setModeLoop() {
+	defer e.wg.Done()
+
+	var (
+		mtx        sync.RWMutex // protects inProgress map
+		inProgress = make(map[string]struct{})
+	)
+
+	for {
+		select {
+		case <-e.closeCh:
+			return
+		case r := <-e.setModeCh:
+			sid := r.sh.ID().String()
+
+			mtx.Lock()
+			_, ok := inProgress[sid]
+			if !ok {
+				inProgress[sid] = struct{}{}
+				go func() {
+					e.moveToDegraded(r.sh, r.errorCount)
+
+					mtx.Lock()
+					delete(inProgress, sid)
+					mtx.Unlock()
+				}()
+			}
+			mtx.Unlock()
+		}
+	}
+}
+
+func (e *StorageEngine) moveToDegraded(sh *shard.Shard, errCount uint32) {
+	e.mtx.RLock()
+	defer e.mtx.RUnlock()
+
 	sid := sh.ID()
-	errCount := sh.errorCount.Inc()
+	err := sh.SetMode(mode.DegradedReadOnly)
-	e.log.Warn(msg, append([]zap.Field{
-		zap.Stringer("shard_id", sid),
-		zap.Uint32("error count", errCount),
-		zap.String("error", err.Error()),
-	}, fields...)...)
-
-	if e.errorsThreshold == 0 || errCount < e.errorsThreshold {
-		return
-	}
-
-	err = sh.SetMode(mode.DegradedReadOnly)
 	if err != nil {
 		e.log.Error("failed to move shard in degraded-read-only mode, moving to read-only",
 			zap.Stringer("shard_id", sid),
@@ -86,6 +108,85 @@ func (e *StorageEngine) reportShardError(
 	}
 }
 
+// reportShardErrorBackground increases shard error counter and logs an error.
+// It is intended to be used from background workers and
+// doesn't change shard mode because of possible deadlocks.
+func (e *StorageEngine) reportShardErrorBackground(id string, msg string, err error) {
+	e.mtx.RLock()
+	sh, ok := e.shards[id]
+	e.mtx.RUnlock()
+
+	if !ok {
+		return
+	}
+
+	if isLogical(err) {
+		e.log.Warn(msg,
+			zap.Stringer("shard_id", sh.ID()),
+			zap.String("error", err.Error()))
+		return
+	}
+
+	errCount := sh.errorCount.Inc()
+	e.reportShardErrorWithFlags(sh.Shard, errCount, false, msg, err)
+}
+
+// reportShardError checks that the amount of errors doesn't exceed the configured threshold.
+// If it does, shard is set to read-only mode.
+func (e *StorageEngine) reportShardError(
+	sh hashedShard,
+	msg string,
+	err error,
+	fields ...zap.Field) {
+	if isLogical(err) {
+		e.log.Warn(msg,
+			zap.Stringer("shard_id", sh.ID()),
+			zap.String("error", err.Error()))
+		return
+	}
+
+	errCount := sh.errorCount.Inc()
+	e.reportShardErrorWithFlags(sh.Shard, errCount, true, msg, err, fields...)
+}
+
+func (e *StorageEngine) reportShardErrorWithFlags(
+	sh *shard.Shard,
+	errCount uint32,
+	block bool,
+	msg string,
+	err error,
+	fields ...zap.Field) {
+	sid := sh.ID()
+	e.log.Warn(msg, append([]zap.Field{
+		zap.Stringer("shard_id", sid),
+		zap.Uint32("error count", errCount),
+		zap.String("error", err.Error()),
+	}, fields...)...)
+
+	if e.errorsThreshold == 0 || errCount < e.errorsThreshold {
+		return
+	}
+
+	if block {
+		e.moveToDegraded(sh, errCount)
+	} else {
+		req := setModeRequest{
+			errorCount: errCount,
+			sh:         sh,
+		}
+
+		select {
+		case e.setModeCh <- req:
+		default:
+			// For background workers we can have a lot of such errors,
+			// thus logging is done with DEBUG level.
+			e.log.Debug("mode change is in progress, ignoring set-mode request",
+				zap.Stringer("shard_id", sid),
+				zap.Uint32("error_count", errCount))
+		}
+	}
+}
+
 func isLogical(err error) bool {
 	return errors.As(err, &logicerr.Logical{})
 }
@@ -124,6 +225,8 @@ func New(opts ...Option) *StorageEngine {
 		mtx:        new(sync.RWMutex),
 		shards:     make(map[string]shardWrapper),
 		shardPools: make(map[string]util.WorkerPool),
+		closeCh:    make(chan struct{}),
+		setModeCh:  make(chan setModeRequest),
 	}
 }
 

pkg/local_object_storage/engine/error_test.go

@@ -200,8 +200,8 @@ func checkShardState(t *testing.T, e *StorageEngine, id *shard.ID, errCount uint
 	sh := e.shards[id.String()]
 	e.mtx.RUnlock()
 
-	require.Equal(t, mode, sh.GetMode())
 	require.Equal(t, errCount, sh.errorCount.Load())
+	require.Equal(t, mode, sh.GetMode())
 }
 
 // corruptSubDir makes random directory except "blobovnicza" in blobstor FSTree unreadable.

pkg/local_object_storage/engine/evacuate.go

@@ -136,8 +136,10 @@ mainLoop:
 
 		loop:
 			for i := range lst {
+				addr := lst[i].Address
+
 				var getPrm shard.GetPrm
-				getPrm.SetAddress(lst[i])
+				getPrm.SetAddress(addr)
 
 				getRes, err := sh.Get(getPrm)
 				if err != nil {
@@ -147,18 +149,18 @@ mainLoop:
 					return res, err
 				}
 
-				hrw.SortSliceByWeightValue(shards, weights, hrw.Hash([]byte(lst[i].EncodeToString())))
+				hrw.SortSliceByWeightValue(shards, weights, hrw.Hash([]byte(addr.EncodeToString())))
 				for j := range shards {
 					if _, ok := shardMap[shards[j].ID().String()]; ok {
 						continue
 					}
-					putDone, exists := e.putToShard(shards[j].hashedShard, j, shards[j].pool, lst[i], getRes.Object())
+					putDone, exists := e.putToShard(shards[j].hashedShard, j, shards[j].pool, addr, getRes.Object())
 					if putDone || exists {
 						if putDone {
 							e.log.Debug("object is moved to another shard",
 								zap.String("from", sidList[n]),
 								zap.Stringer("to", shards[j].ID()),
-								zap.Stringer("addr", lst[i]))
+								zap.Stringer("addr", addr))
 
 							res.count++
 						}
@@ -172,7 +174,7 @@ mainLoop:
 					return res, fmt.Errorf("%w: %s", errPutShard, lst[i])
 				}
 
-				err = prm.handler(lst[i], getRes.Object())
+				err = prm.handler(addr, getRes.Object())
 				if err != nil {
 					return res, err
 				}

pkg/local_object_storage/engine/inhume.go

@@ -9,6 +9,7 @@ import (
 	apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
+	"go.uber.org/zap"
 )
 
 // InhumePrm encapsulates parameters for inhume operation.
@@ -79,6 +80,18 @@ func (e *StorageEngine) inhume(prm InhumePrm) (InhumeRes, error) {
 	}
 
 	for i := range prm.addrs {
+		if !prm.forceRemoval {
+			locked, err := e.isLocked(prm.addrs[i])
+			if err != nil {
+				e.log.Warn("removing an object without full locking check",
+					zap.Error(err),
+					zap.Stringer("addr", prm.addrs[i]))
+			} else if locked {
+				var lockedErr apistatus.ObjectLocked
+				return InhumeRes{}, lockedErr
+			}
+		}
+
 		if prm.tombstone != nil {
 			shPrm.SetTarget(*prm.tombstone, prm.addrs[i])
 		} else {
@@ -166,6 +179,29 @@ func (e *StorageEngine) inhumeAddr(addr oid.Address, prm shard.InhumePrm, checkE
 	return ok, retErr
 }
 
+func (e *StorageEngine) isLocked(addr oid.Address) (bool, error) {
+	var locked bool
+	var err error
+	var outErr error
+
+	e.iterateOverUnsortedShards(func(h hashedShard) (stop bool) {
+		locked, err = h.Shard.IsLocked(addr)
+		if err != nil {
+			e.reportShardError(h, "can't check object's lockers", err, zap.Stringer("addr", addr))
+			outErr = err
+			return false
+		}
+
+		return locked
+	})
+
+	if locked {
+		return locked, nil
+	}
+
+	return locked, outErr
+}
+
 func (e *StorageEngine) processExpiredTombstones(ctx context.Context, addrs []meta.TombstonedObject) {
 	e.iterateOverUnsortedShards(func(sh hashedShard) (stop bool) {
 		sh.HandleExpiredTombstones(addrs)

pkg/local_object_storage/engine/list.go

@@ -3,8 +3,8 @@ package engine
 import (
 	"sort"
 
+	objectcore "github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
-	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 )
 
 // ErrEndOfListing is returned from an object listing with cursor
@@ -38,12 +38,12 @@ func (p *ListWithCursorPrm) WithCursor(cursor *Cursor) {
 
 // ListWithCursorRes contains values returned from ListWithCursor operation.
 type ListWithCursorRes struct {
-	addrList []oid.Address
+	addrList []objectcore.AddressWithType
 	cursor   *Cursor
 }
 
 // AddressList returns addresses selected by ListWithCursor operation.
-func (l ListWithCursorRes) AddressList() []oid.Address {
+func (l ListWithCursorRes) AddressList() []objectcore.AddressWithType {
 	return l.addrList
 }
 
@@ -60,7 +60,7 @@ func (l ListWithCursorRes) Cursor() *Cursor {
 // Returns ErrEndOfListing if there are no more objects to return or count
 // parameter set to zero.
 func (e *StorageEngine) ListWithCursor(prm ListWithCursorPrm) (ListWithCursorRes, error) {
-	result := make([]oid.Address, 0, prm.count)
+	result := make([]objectcore.AddressWithType, 0, prm.count)
 
 	// 1. Get available shards and sort them.
 	e.mtx.RLock()

pkg/local_object_storage/engine/list_test.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	cidtest "github.com/nspcc-dev/neofs-sdk-go/container/id/test"
-	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
+	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
 	"github.com/stretchr/testify/require"
 )
 
@@ -24,8 +24,8 @@ func TestListWithCursor(t *testing.T) {
 
 	const total = 20
 
-	expected := make([]oid.Address, 0, total)
+	expected := make([]object.AddressWithType, 0, total)
-	got := make([]oid.Address, 0, total)
+	got := make([]object.AddressWithType, 0, total)
 
 	for i := 0; i < total; i++ {
 		containerID := cidtest.ID()
@@ -36,7 +36,7 @@ func TestListWithCursor(t *testing.T) {
 
 		_, err := e.Put(prm)
 		require.NoError(t, err)
-		expected = append(expected, object.AddressOf(obj))
+		expected = append(expected, object.AddressWithType{Type: objectSDK.TypeRegular, Address: object.AddressOf(obj)})
 	}
 
 	expected = sortAddresses(expected)
@@ -68,9 +68,9 @@ func TestListWithCursor(t *testing.T) {
 	require.Equal(t, expected, got)
 }
 
-func sortAddresses(addr []oid.Address) []oid.Address {
+func sortAddresses(addrWithType []object.AddressWithType) []object.AddressWithType {
-	sort.Slice(addr, func(i, j int) bool {
+	sort.Slice(addrWithType, func(i, j int) bool {
-		return addr[i].EncodeToString() < addr[j].EncodeToString()
+		return addrWithType[i].Address.EncodeToString() < addrWithType[j].Address.EncodeToString()
 	})
-	return addr
+	return addrWithType
 }

pkg/local_object_storage/engine/shards.go

@@ -87,6 +87,7 @@ func (e *StorageEngine) createShard(opts []shard.Option) (*shard.Shard, error) {
 		shard.WithExpiredTombstonesCallback(e.processExpiredTombstones),
 		shard.WithExpiredLocksCallback(e.processExpiredLocks),
 		shard.WithDeletedLockCallback(e.processDeletedLocks),
+		shard.WithReportErrorFunc(e.reportShardErrorBackground),
 	)...)
 
 	if err := sh.UpdateID(); err != nil {

pkg/local_object_storage/engine/tree.go

@@ -13,63 +13,61 @@ var _ pilorama.Forest = (*StorageEngine)(nil)
 
 // TreeMove implements the pilorama.Forest interface.
 func (e *StorageEngine) TreeMove(d pilorama.CIDDescriptor, treeID string, m *pilorama.Move) (*pilorama.LogMove, error) {
-	var err error
+	index, lst, err := e.getTreeShard(d.CID, treeID)
-	var lm *pilorama.LogMove
+	if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
-	for _, sh := range e.sortShardsByWeight(d.CID) {
-		lm, err = sh.TreeMove(d, treeID, m)
-		if err != nil {
-			if errors.Is(err, shard.ErrReadOnlyMode) || err == shard.ErrPiloramaDisabled {
 		return nil, err
 	}
-			e.reportShardError(sh, "can't perform `TreeMove`", err,
+
+	lm, err := lst[index].TreeMove(d, treeID, m)
+	if err != nil {
+		if !errors.Is(err, shard.ErrReadOnlyMode) && err != shard.ErrPiloramaDisabled {
+			e.reportShardError(lst[index], "can't perform `TreeMove`", err,
 				zap.Stringer("cid", d.CID),
 				zap.String("tree", treeID))
-			continue
+		}
+
+		return nil, err
 	}
 	return lm, nil
 }
-	return nil, err
-}
 
 // TreeAddByPath implements the pilorama.Forest interface.
 func (e *StorageEngine) TreeAddByPath(d pilorama.CIDDescriptor, treeID string, attr string, path []string, m []pilorama.KeyValue) ([]pilorama.LogMove, error) {
-	var err error
+	index, lst, err := e.getTreeShard(d.CID, treeID)
-	var lm []pilorama.LogMove
+	if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
-	for _, sh := range e.sortShardsByWeight(d.CID) {
-		lm, err = sh.TreeAddByPath(d, treeID, attr, path, m)
-		if err != nil {
-			if errors.Is(err, shard.ErrReadOnlyMode) || err == shard.ErrPiloramaDisabled {
 		return nil, err
 	}
-			e.reportShardError(sh, "can't perform `TreeAddByPath`", err,
+
+	lm, err := lst[index].TreeAddByPath(d, treeID, attr, path, m)
+	if err != nil {
+		if !errors.Is(err, shard.ErrReadOnlyMode) && err != shard.ErrPiloramaDisabled {
+			e.reportShardError(lst[index], "can't perform `TreeAddByPath`", err,
 				zap.Stringer("cid", d.CID),
 				zap.String("tree", treeID))
-			continue
-		}
-		return lm, nil
 		}
 		return nil, err
 	}
+	return lm, nil
+}
 
 // TreeApply implements the pilorama.Forest interface.
 func (e *StorageEngine) TreeApply(d pilorama.CIDDescriptor, treeID string, m *pilorama.Move) error {
-	var err error
+	index, lst, err := e.getTreeShard(d.CID, treeID)
-	for _, sh := range e.sortShardsByWeight(d.CID) {
+	if err != nil && !errors.Is(err, pilorama.ErrTreeNotFound) {
-		err = sh.TreeApply(d, treeID, m)
-		if err != nil {
-			if errors.Is(err, shard.ErrReadOnlyMode) || err == shard.ErrPiloramaDisabled {
 		return err
 	}
-			e.reportShardError(sh, "can't perform `TreeApply`", err,
-				zap.Stringer("cid", d.CID),
-				zap.String("tree", treeID))
-			continue
-		}
-		return nil
-	}
 
+	err = lst[index].TreeApply(d, treeID, m)
+	if err != nil {
+		if !errors.Is(err, shard.ErrReadOnlyMode) && err != shard.ErrPiloramaDisabled {
+			e.reportShardError(lst[index], "can't perform `TreeApply`", err,
+				zap.Stringer("cid", d.CID),
+				zap.String("tree", treeID))
+		}
 		return err
 	}
+	return nil
+}
 
 // TreeGetByPath implements the pilorama.Forest interface.
 func (e *StorageEngine) TreeGetByPath(cid cidSDK.ID, treeID string, attr string, path []string, latest bool) ([]pilorama.Node, error) {
@@ -205,3 +203,27 @@ func (e *StorageEngine) TreeList(cid cidSDK.ID) ([]string, error) {
 
 	return resIDs, nil
 }
+
+// TreeExists implements the pilorama.Forest interface.
+func (e *StorageEngine) TreeExists(cid cidSDK.ID, treeID string) (bool, error) {
+	_, _, err := e.getTreeShard(cid, treeID)
+	if errors.Is(err, pilorama.ErrTreeNotFound) {
+		return false, nil
+	}
+	return err == nil, err
+}
+
+func (e *StorageEngine) getTreeShard(cid cidSDK.ID, treeID string) (int, []hashedShard, error) {
+	lst := e.sortShardsByWeight(cid)
+	for i, sh := range lst {
+		exists, err := sh.TreeExists(cid, treeID)
+		if err != nil {
+			return 0, nil, err
+		}
+		if exists {
+			return i, lst, err
+		}
+	}
+
+	return 0, lst, pilorama.ErrTreeNotFound
+}

pkg/local_object_storage/metabase/containers.go

@@ -42,6 +42,13 @@ func (db *DB) containers(tx *bbolt.Tx) ([]cid.ID, error) {
 }
 
 func (db *DB) ContainerSize(id cid.ID) (size uint64, err error) {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return 0, ErrDegradedMode
+	}
+
 	err = db.boltDB.View(func(tx *bbolt.Tx) error {
 		size, err = db.containerSize(tx, id)
 

pkg/local_object_storage/metabase/control.go

@@ -15,6 +15,9 @@ import (
 // ErrDegradedMode is returned when metabase is in a degraded mode.
 var ErrDegradedMode = logicerr.New("metabase is in a degraded mode")
 
+// ErrReadOnlyMode is returned when metabase is in a read-only mode.
+var ErrReadOnlyMode = logicerr.New("metabase is in a read-only mode")
+
 // Open boltDB instance for metabase.
 func (db *DB) Open(readOnly bool) error {
 	err := util.MkdirAllX(filepath.Dir(db.info.Path), db.info.Permission)
@@ -81,6 +84,13 @@ func (db *DB) Init() error {
 // Reset resets metabase. Works similar to Init but cleans up all static buckets and
 // removes all dynamic (CID-dependent) ones in non-blank BoltDB instances.
 func (db *DB) Reset() error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	}
+
 	return db.init(true)
 }
 
@@ -147,6 +157,15 @@ func (db *DB) init(reset bool) error {
 
 // SyncCounters forces to synchronize the object counters.
 func (db *DB) SyncCounters() error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return ErrReadOnlyMode
+	}
+
 	return db.boltDB.Update(func(tx *bbolt.Tx) error {
 		return syncCounter(tx, true)
 	})

pkg/local_object_storage/metabase/counter.go

@@ -43,6 +43,13 @@ func (o ObjectCounters) Phy() uint64 {
 // Returns only the errors that do not allow reading counter
 // in Bolt database.
 func (db *DB) ObjectCounters() (cc ObjectCounters, err error) {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ObjectCounters{}, ErrDegradedMode
+	}
+
 	err = db.boltDB.View(func(tx *bbolt.Tx) error {
 		b := tx.Bucket(shardInfoBucket)
 		if b != nil {

pkg/local_object_storage/metabase/delete.go

@@ -57,6 +57,12 @@ func (db *DB) Delete(prm DeletePrm) (DeleteRes, error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return DeleteRes{}, ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return DeleteRes{}, ErrReadOnlyMode
+	}
+
 	var rawRemoved uint64
 	var availableRemoved uint64
 	var err error
@@ -157,7 +163,10 @@ func (db *DB) delete(tx *bbolt.Tx, addr oid.Address, refCounter referenceCounter
 	// unmarshal object, work only with physically stored (raw == true) objects
 	obj, err := db.get(tx, addr, key, false, true, currEpoch)
 	if err != nil {
-		if errors.As(err, new(apistatus.ObjectNotFound)) {
+		var siErr *objectSDK.SplitInfoError
+		var notFoundErr apistatus.ObjectNotFound
+
+		if errors.As(err, &notFoundErr) || errors.As(err, &siErr) {
 			return false, false, nil
 		}
 

pkg/local_object_storage/metabase/delete_test.go

@@ -39,9 +39,9 @@ func TestDB_Delete(t *testing.T) {
 	require.NoError(t, err)
 	require.Len(t, l, 1)
 
-	// try to remove parent unsuccessfully
+	// try to remove parent, should be no-op, error-free
 	err = metaDelete(db, object.AddressOf(parent))
-	require.Error(t, err)
+	require.NoError(t, err)
 
 	// inhume parent and child so they will be on graveyard
 	ts := generateObjectWithCID(t, cnr)

pkg/local_object_storage/metabase/exists.go

@@ -44,6 +44,10 @@ func (db *DB) Exists(prm ExistsPrm) (res ExistsRes, err error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	}
+
 	currEpoch := db.epochState.CurrentEpoch()
 
 	err = db.boltDB.View(func(tx *bbolt.Tx) error {

pkg/local_object_storage/metabase/get.go

@@ -47,8 +47,12 @@ func (r GetRes) Header() *objectSDK.Object {
 // Returns an error of type apistatus.ObjectAlreadyRemoved if object has been placed in graveyard.
 // Returns the object.ErrObjectIsExpired if the object is presented but already expired.
 func (db *DB) Get(prm GetPrm) (res GetRes, err error) {
-	db.modeMtx.Lock()
+	db.modeMtx.RLock()
-	defer db.modeMtx.Unlock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	}
 
 	currEpoch := db.epochState.CurrentEpoch()
 

pkg/local_object_storage/metabase/graveyard.go

@@ -58,6 +58,13 @@ func (g *GarbageIterationPrm) SetOffset(offset oid.Address) {
 // If h returns ErrInterruptIterator, nil returns immediately.
 // Returns other errors of h directly.
 func (db *DB) IterateOverGarbage(p GarbageIterationPrm) error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	}
+
 	return db.boltDB.View(func(tx *bbolt.Tx) error {
 		return db.iterateDeletedObj(tx, gcHandler{p.h}, p.offset)
 	})
@@ -118,6 +125,13 @@ func (g *GraveyardIterationPrm) SetOffset(offset oid.Address) {
 // If h returns ErrInterruptIterator, nil returns immediately.
 // Returns other errors of h directly.
 func (db *DB) IterateOverGraveyard(p GraveyardIterationPrm) error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	}
+
 	return db.boltDB.View(func(tx *bbolt.Tx) error {
 		return db.iterateDeletedObj(tx, graveyardHandler{p.h}, p.offset)
 	})
@@ -218,6 +232,15 @@ func graveFromKV(k, v []byte) (res TombstonedObject, err error) {
 //
 // Returns any error appeared during deletion process.
 func (db *DB) DropGraves(tss []TombstonedObject) error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return ErrReadOnlyMode
+	}
+
 	buf := make([]byte, addressKeySize)
 
 	return db.boltDB.Update(func(tx *bbolt.Tx) error {

pkg/local_object_storage/metabase/info.go

@@ -15,5 +15,8 @@ type Info struct {
 
 // DumpInfo returns information about the DB.
 func (db *DB) DumpInfo() Info {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
 	return db.info
 }

pkg/local_object_storage/metabase/inhume.go

@@ -95,6 +95,8 @@ func (db *DB) Inhume(prm InhumePrm) (res InhumeRes, err error) {
 
 	if db.mode.NoMetabase() {
 		return InhumeRes{}, ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return InhumeRes{}, ErrReadOnlyMode
 	}
 
 	currEpoch := db.epochState.CurrentEpoch()

pkg/local_object_storage/metabase/iterators.go

@@ -44,6 +44,13 @@ var ErrInterruptIterator = logicerr.New("iterator is interrupted")
 // If h returns ErrInterruptIterator, nil returns immediately.
 // Returns other errors of h directly.
 func (db *DB) IterateExpired(epoch uint64, h ExpiredObjectHandler) error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	}
+
 	return db.boltDB.View(func(tx *bbolt.Tx) error {
 		return db.iterateExpired(tx, epoch, h)
 	})
@@ -119,6 +126,13 @@ func (db *DB) iterateExpired(tx *bbolt.Tx, epoch uint64, h ExpiredObjectHandler)
 //
 // Does not modify tss.
 func (db *DB) IterateCoveredByTombstones(tss map[string]oid.Address, h func(oid.Address) error) error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	}
+
 	return db.boltDB.View(func(tx *bbolt.Tx) error {
 		return db.iterateCoveredByTombstones(tx, tss, h)
 	})

pkg/local_object_storage/metabase/list.go

@@ -1,8 +1,10 @@
 package meta
 
 import (
+	objectcore "github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/util/logicerr"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
+	"github.com/nspcc-dev/neofs-sdk-go/object"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"go.etcd.io/bbolt"
 )
@@ -38,12 +40,12 @@ func (l *ListPrm) SetCursor(cursor *Cursor) {
 
 // ListRes contains values returned from ListWithCursor operation.
 type ListRes struct {
-	addrList []oid.Address
+	addrList []objectcore.AddressWithType
 	cursor   *Cursor
 }
 
 // AddressList returns addresses selected by ListWithCursor operation.
-func (l ListRes) AddressList() []oid.Address {
+func (l ListRes) AddressList() []objectcore.AddressWithType {
 	return l.addrList
 }
 
@@ -62,7 +64,11 @@ func (db *DB) ListWithCursor(prm ListPrm) (res ListRes, err error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
-	result := make([]oid.Address, 0, prm.count)
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	}
+
+	result := make([]objectcore.AddressWithType, 0, prm.count)
 
 	err = db.boltDB.View(func(tx *bbolt.Tx) error {
 		res.addrList, res.cursor, err = db.listWithCursor(tx, result, prm.count, prm.cursor)
@@ -72,7 +78,7 @@ func (db *DB) ListWithCursor(prm ListPrm) (res ListRes, err error) {
 	return res, err
 }
 
-func (db *DB) listWithCursor(tx *bbolt.Tx, result []oid.Address, count int, cursor *Cursor) ([]oid.Address, *Cursor, error) {
+func (db *DB) listWithCursor(tx *bbolt.Tx, result []objectcore.AddressWithType, count int, cursor *Cursor) ([]objectcore.AddressWithType, *Cursor, error) {
 	threshold := cursor == nil // threshold is a flag to ignore cursor
 	var bucketName []byte
 
@@ -97,12 +103,17 @@ loop:
 			continue
 		}
 
+		var objType object.Type
+
 		switch prefix {
-		case
+		case primaryPrefix:
-			primaryPrefix,
+			objType = object.TypeRegular
-			storageGroupPrefix,
+		case storageGroupPrefix:
-			lockersPrefix,
+			objType = object.TypeStorageGroup
-			tombstonePrefix:
+		case lockersPrefix:
+			objType = object.TypeLock
+		case tombstonePrefix:
+			objType = object.TypeTombstone
 		default:
 			continue
 		}
@@ -110,7 +121,7 @@ loop:
 		bkt := tx.Bucket(name)
 		if bkt != nil {
 			copy(rawAddr, cidRaw)
-			result, offset, cursor = selectNFromBucket(bkt, graveyardBkt, garbageBkt, rawAddr, containerID,
+			result, offset, cursor = selectNFromBucket(bkt, objType, graveyardBkt, garbageBkt, rawAddr, containerID,
 				result, count, cursor, threshold)
 		}
 		bucketName = name
@@ -145,14 +156,15 @@ loop:
 // selectNFromBucket similar to selectAllFromBucket but uses cursor to find
 // object to start selecting from. Ignores inhumed objects.
 func selectNFromBucket(bkt *bbolt.Bucket, // main bucket
+	objType object.Type, // type of the objects stored in the main bucket
 	graveyardBkt, garbageBkt *bbolt.Bucket, // cached graveyard buckets
 	cidRaw []byte, // container ID prefix, optimization
 	cnt cid.ID, // container ID
-	to []oid.Address, // listing result
+	to []objectcore.AddressWithType, // listing result
 	limit int, // stop listing at `limit` items in result
 	cursor *Cursor, // start from cursor object
 	threshold bool, // ignore cursor and start immediately
-) ([]oid.Address, []byte, *Cursor) {
+) ([]objectcore.AddressWithType, []byte, *Cursor) {
 	if cursor == nil {
 		cursor = new(Cursor)
 	}
@@ -186,7 +198,7 @@ func selectNFromBucket(bkt *bbolt.Bucket, // main bucket
 		var a oid.Address
 		a.SetContainer(cnt)
 		a.SetObject(obj)
-		to = append(to, a)
+		to = append(to, objectcore.AddressWithType{Address: a, Type: objType})
 		count++
 	}
 

pkg/local_object_storage/metabase/list_test.go

@@ -9,7 +9,6 @@ import (
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	cidtest "github.com/nspcc-dev/neofs-sdk-go/container/id/test"
 	objectSDK "github.com/nspcc-dev/neofs-sdk-go/object"
-	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	oidtest "github.com/nspcc-dev/neofs-sdk-go/object/id/test"
 	"github.com/stretchr/testify/require"
 	"go.etcd.io/bbolt"
@@ -73,7 +72,7 @@ func TestLisObjectsWithCursor(t *testing.T) {
 		total      = containers * 5 // regular + ts + sg + child + lock
 	)
 
-	expected := make([]oid.Address, 0, total)
+	expected := make([]object.AddressWithType, 0, total)
 
 	// fill metabase with objects
 	for i := 0; i < containers; i++ {
@@ -84,28 +83,28 @@ func TestLisObjectsWithCursor(t *testing.T) {
 		obj.SetType(objectSDK.TypeRegular)
 		err := putBig(db, obj)
 		require.NoError(t, err)
-		expected = append(expected, object.AddressOf(obj))
+		expected = append(expected, object.AddressWithType{Address: object.AddressOf(obj), Type: objectSDK.TypeRegular})
 
 		// add one tombstone
 		obj = generateObjectWithCID(t, containerID)
 		obj.SetType(objectSDK.TypeTombstone)
 		err = putBig(db, obj)
 		require.NoError(t, err)
-		expected = append(expected, object.AddressOf(obj))
+		expected = append(expected, object.AddressWithType{Address: object.AddressOf(obj), Type: objectSDK.TypeTombstone})
 
 		// add one storage group
 		obj = generateObjectWithCID(t, containerID)
 		obj.SetType(objectSDK.TypeStorageGroup)
 		err = putBig(db, obj)
 		require.NoError(t, err)
-		expected = append(expected, object.AddressOf(obj))
+		expected = append(expected, object.AddressWithType{Address: object.AddressOf(obj), Type: objectSDK.TypeStorageGroup})
 
 		// add one lock
 		obj = generateObjectWithCID(t, containerID)
 		obj.SetType(objectSDK.TypeLock)
 		err = putBig(db, obj)
 		require.NoError(t, err)
-		expected = append(expected, object.AddressOf(obj))
+		expected = append(expected, object.AddressWithType{Address: object.AddressOf(obj), Type: objectSDK.TypeLock})
 
 		// add one inhumed (do not include into expected)
 		obj = generateObjectWithCID(t, containerID)
@@ -127,14 +126,14 @@ func TestLisObjectsWithCursor(t *testing.T) {
 		child.SetSplitID(splitID)
 		err = putBig(db, child)
 		require.NoError(t, err)
-		expected = append(expected, object.AddressOf(child))
+		expected = append(expected, object.AddressWithType{Address: object.AddressOf(child), Type: objectSDK.TypeRegular})
 	}
 
 	expected = sortAddresses(expected)
 
 	t.Run("success with various count", func(t *testing.T) {
 		for countPerReq := 1; countPerReq <= total; countPerReq++ {
-			got := make([]oid.Address, 0, total)
+			got := make([]object.AddressWithType, 0, total)
 
 			res, cursor, err := metaListWithCursor(db, uint32(countPerReq), nil)
 			require.NoError(t, err, "count:%d", countPerReq)
@@ -184,8 +183,8 @@ func TestAddObjectDuringListingWithCursor(t *testing.T) {
 	got, cursor, err := metaListWithCursor(db, total/2, nil)
 	require.NoError(t, err)
 	for _, obj := range got {
-		if _, ok := expected[obj.EncodeToString()]; ok {
+		if _, ok := expected[obj.Address.EncodeToString()]; ok {
-			expected[obj.EncodeToString()]++
+			expected[obj.Address.EncodeToString()]++
 		}
 	}
 
@@ -203,8 +202,8 @@ func TestAddObjectDuringListingWithCursor(t *testing.T) {
 			break
 		}
 		for _, obj := range got {
-			if _, ok := expected[obj.EncodeToString()]; ok {
+			if _, ok := expected[obj.Address.EncodeToString()]; ok {
-				expected[obj.EncodeToString()]++
+				expected[obj.Address.EncodeToString()]++
 			}
 		}
 	}
@@ -216,14 +215,14 @@ func TestAddObjectDuringListingWithCursor(t *testing.T) {
 
 }
 
-func sortAddresses(addr []oid.Address) []oid.Address {
+func sortAddresses(addrWithType []object.AddressWithType) []object.AddressWithType {
-	sort.Slice(addr, func(i, j int) bool {
+	sort.Slice(addrWithType, func(i, j int) bool {
-		return addr[i].EncodeToString() < addr[j].EncodeToString()
+		return addrWithType[i].Address.EncodeToString() < addrWithType[j].Address.EncodeToString()
 	})
-	return addr
+	return addrWithType
 }
 
-func metaListWithCursor(db *meta.DB, count uint32, cursor *meta.Cursor) ([]oid.Address, *meta.Cursor, error) {
+func metaListWithCursor(db *meta.DB, count uint32, cursor *meta.Cursor) ([]object.AddressWithType, *meta.Cursor, error) {
 	var listPrm meta.ListPrm
 	listPrm.SetCount(count)
 	listPrm.SetCursor(cursor)

pkg/local_object_storage/metabase/lock.go

@@ -29,6 +29,12 @@ func (db *DB) Lock(cnr cid.ID, locker oid.ID, locked []oid.ID) error {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return ErrReadOnlyMode
+	}
+
 	if len(locked) == 0 {
 		panic("empty locked list")
 	}
@@ -91,6 +97,13 @@ func (db *DB) Lock(cnr cid.ID, locker oid.ID, locked []oid.ID) error {
 
 // FreeLockedBy unlocks all objects in DB which are locked by lockers.
 func (db *DB) FreeLockedBy(lockers []oid.Address) error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	}
+
 	return db.boltDB.Update(func(tx *bbolt.Tx) error {
 		var err error
 
@@ -175,3 +188,42 @@ func freePotentialLocks(tx *bbolt.Tx, idCnr cid.ID, locker oid.ID) error {
 
 	return nil
 }
+
+// IsLockedPrm groups the parameters of IsLocked operation.
+type IsLockedPrm struct {
+	addr oid.Address
+}
+
+// SetAddress sets object address that will be checked for lock relations.
+func (i *IsLockedPrm) SetAddress(addr oid.Address) {
+	i.addr = addr
+}
+
+// IsLockedRes groups the resulting values of IsLocked operation.
+type IsLockedRes struct {
+	locked bool
+}
+
+// Locked describes the requested object status according to the metabase
+// current state.
+func (i IsLockedRes) Locked() bool {
+	return i.locked
+}
+
+// IsLocked checks is the provided object is locked by any `LOCK`. Not found
+// object is considered as non-locked.
+//
+// Returns only non-logical errors related to underlying database.
+func (db *DB) IsLocked(prm IsLockedPrm) (res IsLockedRes, err error) {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	}
+
+	return res, db.boltDB.View(func(tx *bbolt.Tx) error {
+		res.locked = objectLocked(tx, prm.addr.Container(), prm.addr.Object())
+		return nil
+	})
+}

pkg/local_object_storage/metabase/lock_test.go

@@ -169,6 +169,50 @@ func TestDB_Lock(t *testing.T) {
 	})
 }
 
+func TestDB_IsLocked(t *testing.T) {
+	db := newDB(t)
+
+	// existing and locked objs
+
+	objs, _ := putAndLockObj(t, db, 5)
+	var prm meta.IsLockedPrm
+
+	for _, obj := range objs {
+		prm.SetAddress(objectcore.AddressOf(obj))
+
+		res, err := db.IsLocked(prm)
+		require.NoError(t, err)
+
+		require.True(t, res.Locked())
+	}
+
+	// some rand obj
+
+	prm.SetAddress(oidtest.Address())
+
+	res, err := db.IsLocked(prm)
+	require.NoError(t, err)
+
+	require.False(t, res.Locked())
+
+	// existing but not locked obj
+
+	obj := objecttest.Object()
+
+	var putPrm meta.PutPrm
+	putPrm.SetObject(obj)
+
+	_, err = db.Put(putPrm)
+	require.NoError(t, err)
+
+	prm.SetAddress(objectcore.AddressOf(obj))
+
+	res, err = db.IsLocked(prm)
+	require.NoError(t, err)
+
+	require.False(t, res.Locked())
+}
+
 // putAndLockObj puts object, returns it and its locker.
 func putAndLockObj(t *testing.T, db *meta.DB, numOfLockedObjs int) ([]*object.Object, *object.Object) {
 	cnr := cidtest.ID()

pkg/local_object_storage/metabase/movable.go

@@ -52,6 +52,12 @@ func (db *DB) ToMoveIt(prm ToMoveItPrm) (res ToMoveItRes, err error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return res, ErrReadOnlyMode
+	}
+
 	key := make([]byte, addressKeySize)
 	key = addressKey(prm.addr, key)
 
@@ -68,6 +74,12 @@ func (db *DB) DoNotMove(prm DoNotMovePrm) (res DoNotMoveRes, err error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return res, ErrReadOnlyMode
+	}
+
 	key := make([]byte, addressKeySize)
 	key = addressKey(prm.addr, key)
 
@@ -84,6 +96,10 @@ func (db *DB) Movable(_ MovablePrm) (MovableRes, error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return MovableRes{}, ErrDegradedMode
+	}
+
 	var strAddrs []string
 
 	err := db.boltDB.View(func(tx *bbolt.Tx) error {

pkg/local_object_storage/metabase/put.go

@@ -56,6 +56,12 @@ func (db *DB) Put(prm PutPrm) (res PutRes, err error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return res, ErrReadOnlyMode
+	}
+
 	currEpoch := db.epochState.CurrentEpoch()
 
 	err = db.boltDB.Batch(func(tx *bbolt.Tx) error {

pkg/local_object_storage/metabase/select.go

@@ -59,6 +59,10 @@ func (db *DB) Select(prm SelectPrm) (res SelectRes, err error) {
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	}
+
 	if blindlyProcess(prm.filters) {
 		return res, nil
 	}

pkg/local_object_storage/metabase/shard_id.go

@@ -13,6 +13,13 @@ var (
 // ReadShardID reads shard id from db.
 // If id is missing, returns nil, nil.
 func (db *DB) ReadShardID() ([]byte, error) {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return nil, ErrDegradedMode
+	}
+
 	var id []byte
 	err := db.boltDB.View(func(tx *bbolt.Tx) error {
 		b := tx.Bucket(shardInfoBucket)
@@ -26,6 +33,15 @@ func (db *DB) ReadShardID() ([]byte, error) {
 
 // WriteShardID writes shard it to db.
 func (db *DB) WriteShardID(id []byte) error {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return ErrReadOnlyMode
+	}
+
 	return db.boltDB.Update(func(tx *bbolt.Tx) error {
 		b, err := tx.CreateBucketIfNotExists(shardInfoBucket)
 		if err != nil {

pkg/local_object_storage/metabase/storage_id.go

@@ -29,6 +29,13 @@ func (r StorageIDRes) StorageID() []byte {
 // StorageID returns storage descriptor for objects from the blobstor.
 // It is put together with the object can makes get/delete operation faster.
 func (db *DB) StorageID(prm StorageIDPrm) (res StorageIDRes, err error) {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	}
+
 	err = db.boltDB.View(func(tx *bbolt.Tx) error {
 		res.id, err = db.storageID(tx, prm.addr)
 
@@ -52,3 +59,46 @@ func (db *DB) storageID(tx *bbolt.Tx, addr oid.Address) ([]byte, error) {
 
 	return slice.Copy(storageID), nil
 }
+
+// UpdateStorageIDPrm groups the parameters of UpdateStorageID operation.
+type UpdateStorageIDPrm struct {
+	addr oid.Address
+	id   []byte
+}
+
+// UpdateStorageIDRes groups the resulting values of UpdateStorageID operation.
+type UpdateStorageIDRes struct{}
+
+// SetAddress is an UpdateStorageID option to set the object address to check.
+func (p *UpdateStorageIDPrm) SetAddress(addr oid.Address) {
+	p.addr = addr
+}
+
+// SetStorageID is an UpdateStorageID option to set the storage ID.
+func (p *UpdateStorageIDPrm) SetStorageID(id []byte) {
+	p.id = id
+}
+
+// UpdateStorageID updates storage descriptor for objects from the blobstor.
+func (db *DB) UpdateStorageID(prm UpdateStorageIDPrm) (res UpdateStorageIDRes, err error) {
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	} else if db.mode.ReadOnly() {
+		return res, ErrReadOnlyMode
+	}
+
+	currEpoch := db.epochState.CurrentEpoch()
+
+	err = db.boltDB.Batch(func(tx *bbolt.Tx) error {
+		exists, err := db.exists(tx, prm.addr, currEpoch)
+		if !exists || err != nil {
+			return err
+		}
+		return updateStorageID(tx, prm.addr, prm.id)
+	})
+
+	return
+}

pkg/local_object_storage/metabase/storage_id_test.go

@@ -9,7 +9,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestDB_IsSmall(t *testing.T) {
+func TestDB_StorageID(t *testing.T) {
 	db := newDB(t)
 
 	raw1 := generateObject(t)
@@ -39,6 +39,23 @@ func TestDB_IsSmall(t *testing.T) {
 	fetchedStorageID, err = metaStorageID(db, object.AddressOf(raw1))
 	require.NoError(t, err)
 	require.Equal(t, storageID, fetchedStorageID)
+
+	t.Run("update", func(t *testing.T) {
+		require.NoError(t, metaUpdateStorageID(db, object.AddressOf(raw2), storageID))
+
+		fetchedStorageID, err = metaStorageID(db, object.AddressOf(raw2))
+		require.NoError(t, err)
+		require.Equal(t, storageID, fetchedStorageID)
+	})
+}
+
+func metaUpdateStorageID(db *meta.DB, addr oid.Address, id []byte) error {
+	var sidPrm meta.UpdateStorageIDPrm
+	sidPrm.SetAddress(addr)
+	sidPrm.SetStorageID(id)
+
+	_, err := db.UpdateStorageID(sidPrm)
+	return err
 }
 
 func metaStorageID(db *meta.DB, addr oid.Address) ([]byte, error) {

pkg/local_object_storage/pilorama/boltdb.go

@@ -154,6 +154,19 @@ func (t *boltForest) TreeMove(d CIDDescriptor, treeID string, m *Move) (*LogMove
 	})
 }
 
+// TreeExists implements the Forest interface.
+func (t *boltForest) TreeExists(cid cidSDK.ID, treeID string) (bool, error) {
+	var exists bool
+
+	err := t.db.View(func(tx *bbolt.Tx) error {
+		treeRoot := tx.Bucket(bucketName(cid, treeID))
+		exists = treeRoot != nil
+		return nil
+	})
+
+	return exists, err
+}
+
 // TreeAddByPath implements the Forest interface.
 func (t *boltForest) TreeAddByPath(d CIDDescriptor, treeID string, attr string, path []string, meta []KeyValue) ([]LogMove, error) {
 	if !d.checkValid() {
@@ -311,6 +324,12 @@ func (t *boltForest) applyOperation(logBucket, treeBucket *bbolt.Bucket, lm *Log
 			return err
 		}
 	}
+
+	if key == nil {
+		// The operation is inserted in the beginning, reposition the cursor.
+		// Otherwise, `Next` call will return currently inserted operation.
+		c.First()
+	}
 	key, value = c.Next()
 
 	// 3. Re-apply all other operations.
@@ -332,8 +351,8 @@ func (t *boltForest) do(lb *bbolt.Bucket, b *bbolt.Bucket, key []byte, op *LogMo
 	shouldPut := !t.isAncestor(b, key, op.Child, op.Parent)
 
 	currParent := b.Get(parentKey(key, op.Child))
+	op.HasOld = currParent != nil
 	if currParent != nil { // node is already in tree
-		op.HasOld = true
 		op.Old.Parent = binary.LittleEndian.Uint64(currParent)
 		if err := op.Old.Meta.FromBytes(b.Get(metaKey(key, op.Child))); err != nil {
 			return err
@@ -608,6 +627,17 @@ func (t *boltForest) TreeGetOpLog(cid cidSDK.ID, treeID string, height uint64) (
 // TreeDrop implements the pilorama.Forest interface.
 func (t *boltForest) TreeDrop(cid cidSDK.ID, treeID string) error {
 	return t.db.Batch(func(tx *bbolt.Tx) error {
+		if treeID == "" {
+			c := tx.Cursor()
+			prefix := []byte(cid.EncodeToString())
+			for k, _ := c.Seek(prefix); k != nil && bytes.HasPrefix(k, prefix); k, _ = c.Next() {
+				err := tx.DeleteBucket(k)
+				if err != nil {
+					return err
+				}
+			}
+			return nil
+		}
 		err := tx.DeleteBucket(bucketName(cid, treeID))
 		if errors.Is(err, bbolt.ErrBucketNotFound) {
 			return ErrTreeNotFound

pkg/local_object_storage/pilorama/forest.go

@@ -183,13 +183,21 @@ func (f *memoryForest) TreeGetOpLog(cid cidSDK.ID, treeID string, height uint64)
 
 // TreeDrop implements the pilorama.Forest interface.
 func (f *memoryForest) TreeDrop(cid cidSDK.ID, treeID string) error {
-	fullID := cid.String() + "/" + treeID
+	cidStr := cid.String()
+	if treeID == "" {
+		for k := range f.treeMap {
+			if strings.HasPrefix(k, cidStr) {
+				delete(f.treeMap, k)
+			}
+		}
+	} else {
+		fullID := cidStr + "/" + treeID
 		_, ok := f.treeMap[fullID]
 		if !ok {
 			return ErrTreeNotFound
 		}
-
 		delete(f.treeMap, fullID)
+	}
 	return nil
 }
 
@@ -209,3 +217,10 @@ func (f *memoryForest) TreeList(cid cidSDK.ID) ([]string, error) {
 
 	return res, nil
 }
+
+// TreeExists implements the pilorama.Forest interface.
+func (f *memoryForest) TreeExists(cid cidSDK.ID, treeID string) (bool, error) {
+	fullID := cid.EncodeToString() + "/" + treeID
+	_, ok := f.treeMap[fullID]
+	return ok, nil
+}

pkg/local_object_storage/pilorama/forest_test.go

@@ -180,14 +180,26 @@ func TestForest_TreeDrop(t *testing.T) {
 }
 
 func testForestTreeDrop(t *testing.T, s Forest) {
-	cid := cidtest.ID()
+	const cidsSize = 3
+	var cids [cidsSize]cidSDK.ID
+
+	for i := range cids {
+		cids[i] = cidtest.ID()
+	}
+	cid := cids[0]
 
 	t.Run("return nil if not found", func(t *testing.T) {
 		require.ErrorIs(t, s.TreeDrop(cid, "123"), ErrTreeNotFound)
 	})
 
+	require.NoError(t, s.TreeDrop(cid, ""))
+
 	trees := []string{"tree1", "tree2"}
-	d := CIDDescriptor{cid, 0, 1}
+	var descs [cidsSize]CIDDescriptor
+	for i := range descs {
+		descs[i] = CIDDescriptor{cids[i], 0, 1}
+	}
+	d := descs[0]
 	for i := range trees {
 		_, err := s.TreeAddByPath(d, trees[i], AttributeFilename, []string{"path"},
 			[]KeyValue{{Key: "TreeName", Value: []byte(trees[i])}})
@@ -202,6 +214,28 @@ func testForestTreeDrop(t *testing.T, s Forest) {
 
 	_, err = s.TreeGetByPath(cid, trees[1], AttributeFilename, []string{"path"}, true)
 	require.NoError(t, err)
+
+	for j := range descs {
+		for i := range trees {
+			_, err := s.TreeAddByPath(descs[j], trees[i], AttributeFilename, []string{"path"},
+				[]KeyValue{{Key: "TreeName", Value: []byte(trees[i])}})
+			require.NoError(t, err)
+		}
+	}
+	list, err := s.TreeList(cid)
+	require.NotEmpty(t, list)
+
+	require.NoError(t, s.TreeDrop(cid, ""))
+
+	list, err = s.TreeList(cid)
+	require.NoError(t, err)
+	require.Empty(t, list)
+
+	for j := 1; j < len(cids); j++ {
+		list, err = s.TreeList(cids[j])
+		require.NoError(t, err)
+		require.Equal(t, len(list), len(trees))
+	}
 }
 
 func TestForest_TreeAdd(t *testing.T) {
@@ -478,6 +512,140 @@ func testForestTreeGetOpLog(t *testing.T, constructor func(t testing.TB) Forest)
 	})
 }
 
+func TestForest_TreeExists(t *testing.T) {
+	for i := range providers {
+		t.Run(providers[i].name, func(t *testing.T) {
+			testForestTreeExists(t, providers[i].construct)
+		})
+	}
+}
+
+func testForestTreeExists(t *testing.T, constructor func(t testing.TB) Forest) {
+	s := constructor(t)
+
+	checkExists := func(t *testing.T, expected bool, cid cidSDK.ID, treeID string) {
+		actual, err := s.TreeExists(cid, treeID)
+		require.NoError(t, err)
+		require.Equal(t, expected, actual)
+	}
+
+	cid := cidtest.ID()
+	treeID := "version"
+	d := CIDDescriptor{cid, 0, 1}
+
+	t.Run("empty state, no panic", func(t *testing.T) {
+		checkExists(t, false, cid, treeID)
+	})
+
+	require.NoError(t, s.TreeApply(d, treeID, &Move{Parent: 0, Child: 1}))
+	checkExists(t, true, cid, treeID)
+	checkExists(t, false, cidtest.ID(), treeID) // different CID, same tree
+	checkExists(t, false, cid, "another tree")  // same CID, different tree
+
+	t.Run("can be removed", func(t *testing.T) {
+		require.NoError(t, s.TreeDrop(cid, treeID))
+		checkExists(t, false, cid, treeID)
+	})
+}
+
+func TestApplyTricky1(t *testing.T) {
+	ops := []Move{
+		{
+			Parent: 1,
+			Meta:   Meta{Time: 100},
+			Child:  2,
+		},
+		{
+			Parent: 0,
+			Meta:   Meta{Time: 80},
+			Child:  1,
+		},
+	}
+
+	expected := []struct{ child, parent Node }{
+		{1, 0},
+		{2, 1},
+	}
+
+	treeID := "version"
+	d := CIDDescriptor{CID: cidtest.ID(), Position: 0, Size: 1}
+	for i := range providers {
+		t.Run(providers[i].name, func(t *testing.T) {
+			s := providers[i].construct(t)
+			for i := range ops {
+				require.NoError(t, s.TreeApply(d, treeID, &ops[i]))
+			}
+
+			for i := range expected {
+				_, parent, err := s.TreeGetMeta(d.CID, treeID, expected[i].child)
+				require.NoError(t, err)
+				require.Equal(t, expected[i].parent, parent)
+			}
+		})
+	}
+}
+
+func TestApplyTricky2(t *testing.T) {
+	// Apply operations in the reverse order and then insert an operation in the middle
+	// so that previous "old" parent becomes invalid.
+	ops := []Move{
+		{
+			Parent: 10000,
+			Meta:   Meta{Time: 100},
+			Child:  5,
+		},
+		{
+			Parent: 3,
+			Meta:   Meta{Time: 80},
+			Child:  5,
+		},
+		{
+			Parent: 5,
+			Meta:   Meta{Time: 40},
+			Child:  3,
+		},
+		{
+			Parent: 5,
+			Meta:   Meta{Time: 60},
+			Child:  1,
+		},
+		{
+			Parent: 1,
+			Meta:   Meta{Time: 90},
+			Child:  2,
+		},
+		{
+			Parent: 0,
+			Meta:   Meta{Time: 10},
+			Child:  5,
+		},
+	}
+
+	expected := []struct{ child, parent Node }{
+		{5, 10_000},
+		{3, 5},
+		{2, 1},
+		{1, 5},
+	}
+
+	treeID := "version"
+	d := CIDDescriptor{CID: cidtest.ID(), Position: 0, Size: 1}
+	for i := range providers {
+		t.Run(providers[i].name, func(t *testing.T) {
+			s := providers[i].construct(t)
+			for i := range ops {
+				require.NoError(t, s.TreeApply(d, treeID, &ops[i]))
+			}
+
+			for i := range expected {
+				_, parent, err := s.TreeGetMeta(d.CID, treeID, expected[i].child)
+				require.NoError(t, err)
+				require.Equal(t, expected[i].parent, parent)
+			}
+		})
+	}
+}
+
 func TestForest_ApplyRandom(t *testing.T) {
 	for i := range providers {
 		t.Run(providers[i].name, func(t *testing.T) {

pkg/local_object_storage/pilorama/interface.go

@@ -35,10 +35,14 @@ type Forest interface {
 	TreeGetOpLog(cid cidSDK.ID, treeID string, height uint64) (Move, error)
 	// TreeDrop drops a tree from the database.
 	// If the tree is not found, ErrTreeNotFound should be returned.
+	// In case of empty treeID drops all trees related to container.
 	TreeDrop(cid cidSDK.ID, treeID string) error
 	// TreeList returns all the tree IDs that have been added to the
 	// passed container ID. Nil slice should be returned if no tree found.
 	TreeList(cid cidSDK.ID) ([]string, error)
+	// TreeExists checks if a tree exists locally.
+	// If the tree is not found, false and a nil error should be returned.
+	TreeExists(cid cidSDK.ID, treeID string) (bool, error)
 }
 
 type ForestStorage interface {

pkg/local_object_storage/pilorama/types.go

@@ -1,8 +1,9 @@
 package pilorama
 
 import (
-	"errors"
 	"math"
+
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/util/logicerr"
 )
 
 // Timestamp is an alias for integer timestamp type.
@@ -50,10 +51,10 @@ const (
 
 var (
 	// ErrTreeNotFound is returned when the requested tree is not found.
-	ErrTreeNotFound = errors.New("tree not found")
+	ErrTreeNotFound = logicerr.New("tree not found")
 	// ErrNotPathAttribute is returned when the path is trying to be constructed with a non-internal
 	// attribute. Currently the only attribute allowed is AttributeFilename.
-	ErrNotPathAttribute = errors.New("attribute can't be used in path construction")
+	ErrNotPathAttribute = logicerr.New("attribute can't be used in path construction")
 )
 
 // isAttributeInternal returns true iff key can be used in `*ByPath` methods.

pkg/local_object_storage/shard/list.go

@@ -3,10 +3,10 @@ package shard
 import (
 	"fmt"
 
+	objectcore "github.com/nspcc-dev/neofs-node/pkg/core/object"
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	"github.com/nspcc-dev/neofs-sdk-go/object"
-	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 	"go.uber.org/zap"
 )
 
@@ -36,7 +36,7 @@ type ListWithCursorPrm struct {
 
 // ListWithCursorRes contains values returned from ListWithCursor operation.
 type ListWithCursorRes struct {
-	addrList []oid.Address
+	addrList []objectcore.AddressWithType
 	cursor   *Cursor
 }
 
@@ -53,7 +53,7 @@ func (p *ListWithCursorPrm) WithCursor(cursor *Cursor) {
 }
 
 // AddressList returns addresses selected by ListWithCursor operation.
-func (r ListWithCursorRes) AddressList() []oid.Address {
+func (r ListWithCursorRes) AddressList() []objectcore.AddressWithType {
 	return r.addrList
 }
 

pkg/local_object_storage/shard/lock.go

@@ -3,6 +3,7 @@ package shard
 import (
 	"fmt"
 
+	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
 )
@@ -28,3 +29,22 @@ func (s *Shard) Lock(idCnr cid.ID, locker oid.ID, locked []oid.ID) error {
 
 	return nil
 }
+
+// IsLocked checks object locking relation of the provided object. Not found object is
+// considered as not locked. Requires healthy metabase, returns ErrDegradedMode otherwise.
+func (s *Shard) IsLocked(addr oid.Address) (bool, error) {
+	m := s.GetMode()
+	if m.NoMetabase() {
+		return false, ErrDegradedMode
+	}
+
+	var prm meta.IsLockedPrm
+	prm.SetAddress(addr)
+
+	res, err := s.metaBase.IsLocked(prm)
+	if err != nil {
+		return false, err
+	}
+
+	return res.Locked(), nil
+}

pkg/local_object_storage/shard/lock_test.go

@@ -16,6 +16,7 @@ import (
 	cidtest "github.com/nspcc-dev/neofs-sdk-go/container/id/test"
 	"github.com/nspcc-dev/neofs-sdk-go/object"
 	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
+	oidtest "github.com/nspcc-dev/neofs-sdk-go/object/id/test"
 	"github.com/stretchr/testify/require"
 	"go.uber.org/zap"
 )
@@ -138,5 +139,39 @@ func TestShard_Lock(t *testing.T) {
 		_, err = sh.Get(getPrm)
 		require.ErrorAs(t, err, new(apistatus.ObjectNotFound))
 	})
-
+}
+
+func TestShard_IsLocked(t *testing.T) {
+	sh := newShard(t, false)
+
+	cnr := cidtest.ID()
+	obj := generateObjectWithCID(t, cnr)
+	cnrID, _ := obj.ContainerID()
+	objID, _ := obj.ID()
+
+	lockID := oidtest.ID()
+
+	// put the object
+
+	var putPrm shard.PutPrm
+	putPrm.SetObject(obj)
+
+	_, err := sh.Put(putPrm)
+	require.NoError(t, err)
+
+	// not locked object is not locked
+
+	locked, err := sh.IsLocked(objectcore.AddressOf(obj))
+	require.NoError(t, err)
+
+	require.False(t, locked)
+
+	// locked object is locked
+
+	require.NoError(t, sh.Lock(cnrID, lockID, []oid.ID{objID}))
+
+	locked, err = sh.IsLocked(objectcore.AddressOf(obj))
+	require.NoError(t, err)
+
+	require.True(t, locked)
 }

pkg/local_object_storage/shard/shard.go

@@ -96,6 +96,8 @@ type cfg struct {
 	tsSource TombstoneSource
 
 	metricsWriter MetricsWriter
+
+	reportErrorFunc func(selfID string, message string, err error)
 }
 
 func defaultCfg() *cfg {
@@ -103,6 +105,7 @@ func defaultCfg() *cfg {
 		rmBatchSize:     100,
 		log:             &logger.Logger{Logger: zap.L()},
 		gcCfg:           defaultGCCfg(),
+		reportErrorFunc: func(string, string, error) {},
 	}
 }
 
@@ -117,22 +120,27 @@ func New(opts ...Option) *Shard {
 	bs := blobstor.New(c.blobOpts...)
 	mb := meta.New(c.metaOpts...)
 
-	var writeCache writecache.Cache
-	if c.useWriteCache {
-		writeCache = writecache.New(
-			append(c.writeCacheOpts,
-				writecache.WithBlobstor(bs),
-				writecache.WithMetabase(mb))...)
-	}
-
 	s := &Shard{
 		cfg:      c,
 		blobStor: bs,
 		metaBase: mb,
-		writeCache: writeCache,
 		tsSource: c.tsSource,
 	}
 
+	reportFunc := func(msg string, err error) {
+		s.reportErrorFunc(s.ID().String(), msg, err)
+	}
+
+	s.blobStor.SetReportErrorFunc(reportFunc)
+
+	if c.useWriteCache {
+		s.writeCache = writecache.New(
+			append(c.writeCacheOpts,
+				writecache.WithReportErrorFunc(reportFunc),
+				writecache.WithBlobstor(bs),
+				writecache.WithMetabase(mb))...)
+	}
+
 	if s.piloramaOpts != nil {
 		s.pilorama = pilorama.NewBoltForest(c.piloramaOpts...)
 	}
@@ -281,6 +289,14 @@ func WithMetricsWriter(v MetricsWriter) Option {
 	}
 }
 
+// WithReportErrorFunc returns option to specify callback for handling storage-related errors
+// in the background workers.
+func WithReportErrorFunc(f func(selfID string, message string, err error)) Option {
+	return func(c *cfg) {
+		c.reportErrorFunc = f
+	}
+}
+
 func (s *Shard) fillInfo() {
 	s.cfg.info.MetaBaseInfo = s.metaBase.DumpInfo()
 	s.cfg.info.BlobStorInfo = s.blobStor.DumpInfo()

pkg/local_object_storage/shard/tree.go

@@ -91,3 +91,11 @@ func (s *Shard) TreeList(cid cidSDK.ID) ([]string, error) {
 	}
 	return s.pilorama.TreeList(cid)
 }
+
+// TreeExists implements the pilorama.Forest interface.
+func (s *Shard) TreeExists(cid cidSDK.ID, treeID string) (bool, error) {
+	if s.pilorama == nil {
+		return false, ErrPiloramaDisabled
+	}
+	return s.pilorama.TreeExists(cid, treeID)
+}

pkg/local_object_storage/shard/writecache.go

@@ -2,8 +2,6 @@ package shard
 
 import (
 	"errors"
-
-	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard/mode"
 )
 
 // FlushWriteCachePrm represents parameters of a `FlushWriteCache` operation.
@@ -20,8 +18,7 @@ func (p *FlushWriteCachePrm) SetIgnoreErrors(ignore bool) {
 // but write-cache is disabled.
 var errWriteCacheDisabled = errors.New("write-cache is disabled")
 
-// FlushWriteCache moves writecache in read-only mode and flushes all data from it.
+// FlushWriteCache flushes all data from the write-cache.
-// After the operation writecache will remain read-only mode.
 func (s *Shard) FlushWriteCache(p FlushWriteCachePrm) error {
 	if !s.hasWriteCache() {
 		return errWriteCacheDisabled
@@ -38,9 +35,5 @@ func (s *Shard) FlushWriteCache(p FlushWriteCachePrm) error {
 		return ErrDegradedMode
 	}
 
-	if err := s.writeCache.SetMode(mode.ReadOnly); err != nil {
-		return err
-	}
-
 	return s.writeCache.Flush(p.ignoreErrors)
 }

pkg/local_object_storage/writecache/flush.go

@@ -1,12 +1,14 @@
 package writecache
 
 import (
+	"bytes"
 	"errors"
 	"time"
 
 	"github.com/mr-tron/base58"
 	"github.com/nspcc-dev/neo-go/pkg/util/slice"
 	objectCore "github.com/nspcc-dev/neofs-node/pkg/core/object"
+	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/common"
 	meta "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/metabase"
 	"github.com/nspcc-dev/neofs-sdk-go/object"
@@ -26,10 +28,6 @@ const (
 	defaultFlushInterval = time.Second
 )
 
-// errMustBeReadOnly is returned when write-cache must be
-// in read-only mode to perform an operation.
-var errMustBeReadOnly = errors.New("write-cache must be in read-only mode")
-
 // runFlushLoop starts background workers which periodically flush objects to the blobstor.
 func (c *cache) runFlushLoop() {
 	for i := 0; i < c.workersCount; i++ {
@@ -60,7 +58,7 @@ func (c *cache) runFlushLoop() {
 }
 
 func (c *cache) flushDB() {
-	lastKey := []byte{}
+	var lastKey []byte
 	var m []objectInfo
 	for {
 		select {
@@ -70,7 +68,6 @@ func (c *cache) flushDB() {
 		}
 
 		m = m[:0]
-		sz := 0
 
 		c.modeMtx.RLock()
 		if c.readOnly() {
@@ -83,12 +80,29 @@ func (c *cache) flushDB() {
 		_ = c.db.View(func(tx *bbolt.Tx) error {
 			b := tx.Bucket(defaultBucket)
 			cs := b.Cursor()
-			for k, v := cs.Seek(lastKey); k != nil && len(m) < flushBatchSize; k, v = cs.Next() {
+
+			var k, v []byte
+
+			if len(lastKey) == 0 {
+				k, v = cs.First()
+			} else {
+				k, v = cs.Seek(lastKey)
+				if bytes.Equal(k, lastKey) {
+					k, v = cs.Next()
+				}
+			}
+
+			for ; k != nil && len(m) < flushBatchSize; k, v = cs.Next() {
+				if len(lastKey) == len(k) {
+					copy(lastKey, k)
+				} else {
+					lastKey = slice.Copy(k)
+				}
+
 				if _, ok := c.flushed.Peek(string(k)); ok {
 					continue
 				}
 
-				sz += len(k) + len(v)
 				m = append(m, objectInfo{
 					addr: string(k),
 					data: slice.Copy(v),
@@ -137,9 +151,28 @@ func (c *cache) flushBigObjects() {
 				break
 			}
 
-			evictNum := 0
+			_ = c.flushFSTree(true)
 
+			c.modeMtx.RUnlock()
+		case <-c.closeCh:
+			return
+		}
+	}
+}
+
+func (c *cache) reportFlushError(msg string, addr string, err error) {
+	if c.reportError != nil {
+		c.reportError(msg, err)
+	} else {
+		c.log.Error(msg,
+			zap.String("address", addr),
+			zap.Error(err))
+	}
+}
+
+func (c *cache) flushFSTree(ignoreErrors bool) error {
 	var prm common.IteratePrm
+	prm.IgnoreErrors = ignoreErrors
 	prm.LazyHandler = func(addr oid.Address, f func() ([]byte, error)) error {
 		sAddr := addr.EncodeToString()
 
@@ -149,45 +182,39 @@ func (c *cache) flushBigObjects() {
 
 		data, err := f()
 		if err != nil {
-					c.log.Error("can't read a file", zap.Stringer("address", addr))
+			c.reportFlushError("can't read a file", sAddr, err)
+			if ignoreErrors {
 				return nil
 			}
-
+			return err
-				c.mtx.Lock()
-				_, compress := c.compressFlags[sAddr]
-				c.mtx.Unlock()
-
-				var prm common.PutPrm
-				prm.Address = addr
-				prm.RawData = data
-				prm.DontCompress = !compress
-
-				if _, err := c.blobstor.Put(prm); err != nil {
-					c.log.Error("cant flush object to blobstor", zap.Error(err))
-					return nil
 		}
 
-				if compress {
+		var obj object.Object
-					c.mtx.Lock()
+		err = obj.Unmarshal(data)
-					delete(c.compressFlags, sAddr)
+		if err != nil {
-					c.mtx.Unlock()
+			c.reportFlushError("can't unmarshal an object", sAddr, err)
+			if ignoreErrors {
+				return nil
+			}
+			return err
+		}
+
+		err = c.flushObject(&obj, data)
+		if err != nil {
+			if ignoreErrors {
+				return nil
+			}
+			return err
 		}
 
 		// mark object as flushed
 		c.flushed.Add(sAddr, false)
 
-				evictNum++
-
 		return nil
 	}
 
-			_, _ = c.fsTree.Iterate(prm)
+	_, err := c.fsTree.Iterate(prm)
-
+	return err
-			c.modeMtx.RUnlock()
-		case <-c.closeCh:
-			return
-		}
-	}
 }
 
 // flushWorker writes objects to the main storage.
@@ -203,30 +230,40 @@ func (c *cache) flushWorker(_ int) {
 			return
 		}
 
-		err := c.flushObject(obj)
+		err := c.flushObject(obj, nil)
-		if err != nil {
+		if err == nil {
-			c.log.Error("can't flush object to the main storage", zap.Error(err))
-		} else {
 			c.flushed.Add(objectCore.AddressOf(obj).EncodeToString(), true)
 		}
 	}
 }
 
 // flushObject is used to write object directly to the main storage.
-func (c *cache) flushObject(obj *object.Object) error {
+func (c *cache) flushObject(obj *object.Object, data []byte) error {
+	addr := objectCore.AddressOf(obj)
+
 	var prm common.PutPrm
 	prm.Object = obj
+	prm.RawData = data
 
 	res, err := c.blobstor.Put(prm)
 	if err != nil {
+		if !errors.Is(err, common.ErrNoSpace) && !errors.Is(err, common.ErrReadOnly) &&
+			!errors.Is(err, blobstor.ErrNoPlaceFound) {
+			c.reportFlushError("can't flush an object to blobstor",
+				addr.EncodeToString(), err)
+		}
 		return err
 	}
 
-	var pPrm meta.PutPrm
+	var updPrm meta.UpdateStorageIDPrm
-	pPrm.SetObject(obj)
+	updPrm.SetAddress(addr)
-	pPrm.SetStorageID(res.StorageID)
+	updPrm.SetStorageID(res.StorageID)
 
-	_, err = c.metabase.Put(pPrm)
+	_, err = c.metabase.UpdateStorageID(updPrm)
+	if err != nil {
+		c.reportFlushError("can't update object storage ID",
+			addr.EncodeToString(), err)
+	}
 	return err
 }
 
@@ -237,44 +274,11 @@ func (c *cache) Flush(ignoreErrors bool) error {
 	c.modeMtx.RLock()
 	defer c.modeMtx.RUnlock()
 
-	if !c.mode.ReadOnly() {
-		return errMustBeReadOnly
-	}
-
 	return c.flush(ignoreErrors)
 }
 
 func (c *cache) flush(ignoreErrors bool) error {
-	var prm common.IteratePrm
+	if err := c.flushFSTree(ignoreErrors); err != nil {
-	prm.IgnoreErrors = ignoreErrors
-	prm.LazyHandler = func(addr oid.Address, f func() ([]byte, error)) error {
-		_, ok := c.flushed.Peek(addr.EncodeToString())
-		if ok {
-			return nil
-		}
-
-		data, err := f()
-		if err != nil {
-			if ignoreErrors {
-				return nil
-			}
-			return err
-		}
-
-		var obj object.Object
-		err = obj.Unmarshal(data)
-		if err != nil {
-			if ignoreErrors {
-				return nil
-			}
-			return err
-		}
-
-		return c.flushObject(&obj)
-	}
-
-	_, err := c.fsTree.Iterate(prm)
-	if err != nil {
 		return err
 	}
 
@@ -290,6 +294,7 @@ func (c *cache) flush(ignoreErrors bool) error {
 			}
 
 			if err := addr.DecodeString(sa); err != nil {
+				c.reportFlushError("can't decode object address from the DB", sa, err)
 				if ignoreErrors {
 					continue
 				}
@@ -298,13 +303,14 @@ func (c *cache) flush(ignoreErrors bool) error {
 
 			var obj object.Object
 			if err := obj.Unmarshal(data); err != nil {
+				c.reportFlushError("can't unmarshal an object from the DB", sa, err)
 				if ignoreErrors {
 					continue
 				}
 				return err
 			}
 
-			if err := c.flushObject(&obj); err != nil {
+			if err := c.flushObject(&obj, data); err != nil {
 				return err
 			}
 		}

pkg/local_object_storage/writecache/flush_test.go

@@ -21,6 +21,7 @@ import (
 	versionSDK "github.com/nspcc-dev/neofs-sdk-go/version"
 	"github.com/stretchr/testify/require"
 	"go.etcd.io/bbolt"
+	"go.uber.org/atomic"
 	"go.uber.org/zap/zaptest"
 )
 
@@ -35,7 +36,7 @@ func TestFlush(t *testing.T) {
 		obj  *object.Object
 	}
 
-	newCache := func(t *testing.T) (Cache, *blobstor.BlobStor, *meta.DB) {
+	newCache := func(t *testing.T, opts ...Option) (Cache, *blobstor.BlobStor, *meta.DB) {
 		dir := t.TempDir()
 		mb := meta.New(
 			meta.WithPath(filepath.Join(dir, "meta")),
@@ -54,11 +55,13 @@ func TestFlush(t *testing.T) {
 		require.NoError(t, bs.Init())
 
 		wc := New(
+			append([]Option{
 				WithLogger(&logger.Logger{Logger: zaptest.NewLogger(t)}),
 				WithPath(filepath.Join(dir, "writecache")),
 				WithSmallObjectSize(smallSize),
 				WithMetabase(mb),
-			WithBlobstor(bs))
+				WithBlobstor(bs),
+			}, opts...)...)
 		require.NoError(t, wc.Open(false))
 		require.NoError(t, wc.Init())
 
@@ -110,7 +113,6 @@ func TestFlush(t *testing.T) {
 		wc, bs, mb := newCache(t)
 		objects := putObjects(t, wc)
 
-		require.NoError(t, wc.SetMode(mode.ReadOnly))
 		require.NoError(t, bs.SetMode(mode.ReadWrite))
 		require.NoError(t, mb.SetMode(mode.ReadWrite))
 
@@ -164,7 +166,10 @@ func TestFlush(t *testing.T) {
 
 	t.Run("ignore errors", func(t *testing.T) {
 		testIgnoreErrors := func(t *testing.T, f func(*cache)) {
-			wc, bs, mb := newCache(t)
+			var errCount atomic.Uint32
+			wc, bs, mb := newCache(t, WithReportErrorFunc(func(message string, err error) {
+				errCount.Inc()
+			}))
 			objects := putObjects(t, wc)
 			f(wc.(*cache))
 
@@ -172,7 +177,9 @@ func TestFlush(t *testing.T) {
 			require.NoError(t, bs.SetMode(mode.ReadWrite))
 			require.NoError(t, mb.SetMode(mode.ReadWrite))
 
+			require.Equal(t, uint32(0), errCount.Load())
 			require.Error(t, wc.Flush(false))
+			require.True(t, errCount.Load() > 0)
 			require.NoError(t, wc.Flush(true))
 
 			check(t, mb, bs, objects)

pkg/local_object_storage/writecache/options.go

@@ -16,8 +16,8 @@ type Option func(*options)
 
 // meta is an interface for a metabase.
 type metabase interface {
-	Put(meta.PutPrm) (meta.PutRes, error)
 	Exists(meta.ExistsPrm) (meta.ExistsRes, error)
+	UpdateStorageID(meta.UpdateStorageIDPrm) (meta.UpdateStorageIDRes, error)
 }
 
 // blob is an interface for the blobstor.
@@ -50,6 +50,10 @@ type options struct {
 	maxBatchSize int
 	// maxBatchDelay is the maximum batch wait time for the small object database.
 	maxBatchDelay time.Duration
+	// noSync is true iff FSTree allows unsynchronized writes.
+	noSync bool
+	// reportError is the function called when encountering disk errors in background workers.
+	reportError func(string, error)
 }
 
 // WithLogger sets logger.
@@ -130,3 +134,20 @@ func WithMaxBatchDelay(d time.Duration) Option {
 		}
 	}
 }
+
+// WithNoSync sets an option to allow returning to caller on PUT before write is persisted.
+// Note, that we use this flag for FSTree only and DO NOT use it for a bolt DB because
+// we cannot yet properly handle the corrupted database during the startup. This SHOULD NOT
+// be relied upon and may be changed in future.
+func WithNoSync(noSync bool) Option {
+	return func(o *options) {
+		o.noSync = noSync
+	}
+}
+
+// WithReportErrorFunc sets error reporting function.
+func WithReportErrorFunc(f func(string, error)) Option {
+	return func(o *options) {
+		o.reportError = f
+	}
+}

pkg/local_object_storage/writecache/storage.go

@@ -56,14 +56,12 @@ func (c *cache) openStore(readOnly bool) error {
 		}
 	}
 
-	c.fsTree = &fstree.FSTree{
+	c.fsTree = fstree.New(
-		Info: fstree.Info{
+		fstree.WithPath(c.path),
-			Permissions: os.ModePerm,
+		fstree.WithPerm(os.ModePerm),
-			RootPath:    c.path,
+		fstree.WithDepth(1),
-		},
+		fstree.WithDirNameLen(1),
-		Depth:      1,
+		fstree.WithNoSync(c.noSync))
-		DirNameLen: 1,
-	}
 
 	// Write-cache can be opened multiple times during `SetMode`.
 	// flushed map must not be re-created in this case.

pkg/morph/client/nns.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neo-go/pkg/encoding/address"
 	"github.com/nspcc-dev/neo-go/pkg/rpcclient"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -149,7 +150,20 @@ func nnsResolve(c *rpcclient.WSClient, nnsHash util.Uint160, domain string) (uti
 	if err != nil {
 		return util.Uint160{}, fmt.Errorf("malformed response: %w", err)
 	}
-	return util.Uint160DecodeStringLE(string(bs))
+
+	// We support several formats for hash encoding, this logic should be maintained in sync
+	// with parseNNSResolveResult from cmd/neofs-adm/internal/modules/morph/initialize_nns.go
+	h, err := util.Uint160DecodeStringLE(string(bs))
+	if err == nil {
+		return h, nil
+	}
+
+	h, err = address.StringToUint160(string(bs))
+	if err == nil {
+		return h, nil
+	}
+
+	return util.Uint160{}, errors.New("no valid hashes are found")
 }
 
 func exists(c *rpcclient.WSClient, nnsHash util.Uint160, domain string) (bool, error) {

pkg/morph/client/notary.go

@@ -13,6 +13,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
+	"github.com/nspcc-dev/neo-go/pkg/neorpc"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	sc "github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -175,9 +176,20 @@ func (c *Client) DepositNotary(amount fixedn.Fixed8, delta uint32) (res util.Uin
 		big.NewInt(int64(amount)),
 		[]interface{}{c.acc.PrivateKey().GetScriptHash(), till})
 	if err != nil {
+		if !errors.Is(err, neorpc.ErrAlreadyExists) {
 			return util.Uint256{}, fmt.Errorf("can't make notary deposit: %w", err)
 		}
 
+		// Transaction is already in mempool waiting to be processed.
+		// This is an expected situation if we restart the service.
+		c.logger.Debug("notary deposit has already been made",
+			zap.Int64("amount", int64(amount)),
+			zap.Int64("expire_at", till),
+			zap.Uint32("vub", vub),
+			zap.Error(err))
+		return util.Uint256{}, nil
+	}
+
 	c.logger.Debug("notary deposit invoke",
 		zap.Int64("amount", int64(amount)),
 		zap.Int64("expire_at", till),

pkg/network/cache/client.go

@@ -13,10 +13,9 @@ type (
 	// ClientCache is a structure around neofs-sdk-go/client to reuse
 	// already created clients.
 	ClientCache struct {
-		mu            *sync.RWMutex
+		mu      sync.RWMutex
 		clients map[string]*multiClient
 		opts    ClientCacheOpts
-		allowExternal bool
 	}
 
 	ClientCacheOpts struct {
@@ -32,17 +31,15 @@ type (
 // `opts` are used for new client creation.
 func NewSDKClientCache(opts ClientCacheOpts) *ClientCache {
 	return &ClientCache{
-		mu:            new(sync.RWMutex),
 		clients: make(map[string]*multiClient),
 		opts:    opts,
-		allowExternal: opts.AllowExternal,
 	}
 }
 
 // Get function returns existing client or creates a new one.
 func (c *ClientCache) Get(info clientcore.NodeInfo) (clientcore.Client, error) {
 	netAddr := info.AddressGroup()
-	if c.allowExternal {
+	if c.opts.AllowExternal {
 		netAddr = append(netAddr, info.ExternalAddressGroup()...)
 	}
 	cacheKey := string(info.PublicKey())