[#1147] node: Implement Lock\Delete requests for EC object

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

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

@@ -357,6 +357,7 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 	_, err := internal.HeadObject(cmd.Context(), prmHead)
 
 	var errSplit *objectSDK.SplitInfoError
+	var errEC *objectSDK.ECInfoError
 
 	switch {
 	default:
@@ -366,19 +367,22 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 		return nil
 	case errors.As(err, &errSplit):
 		common.PrintVerbose(cmd, "Split information received - object is virtual.")
+		splitInfo := errSplit.SplitInfo()
+
+		if members, ok := tryGetSplitMembersByLinkingObject(cmd, splitInfo, prmHead, cnr, true); ok {
+			return members
+		}
+
+		if members, ok := tryGetSplitMembersBySplitID(cmd, splitInfo, cli, cnr); ok {
+			return members
+		}
+
+		return tryRestoreChainInReverse(cmd, splitInfo, prmHead, cli, cnr, obj)
+	case errors.As(err, &errEC):
+		common.PrintVerbose(cmd, "Object is erasure-coded.")
+		return nil
 	}
-
+	return nil
-	splitInfo := errSplit.SplitInfo()
-
-	if members, ok := tryGetSplitMembersByLinkingObject(cmd, splitInfo, prmHead, cnr, true); ok {
-		return members
-	}
-
-	if members, ok := tryGetSplitMembersBySplitID(cmd, splitInfo, cli, cnr); ok {
-		return members
-	}
-
-	return tryRestoreChainInReverse(cmd, splitInfo, prmHead, cli, cnr, obj)
 }
 
 func tryGetSplitMembersByLinkingObject(cmd *cobra.Command, splitInfo *objectSDK.SplitInfo, prmHead internal.HeadObjectPrm, cnr cid.ID, withLinking bool) ([]oid.ID, bool) {

internal/logs/logs.go

@@ -95,6 +95,7 @@ const (
 	DeleteFormingSplitInfo                                               = "forming split info..."
 	DeleteSplitInfoSuccessfullyFormedCollectingMembers                   = "split info successfully formed, collecting members..."
 	DeleteMembersSuccessfullyCollected                                   = "members successfully collected"
+	DeleteECObjectReceived                                               = "erasure-coded object received, form tombstone"
 	GetRemoteCallFailed                                                  = "remote call failed"
 	GetCanNotAssembleTheObject                                           = "can not assemble the object"
 	GetTryingToAssembleTheObject                                         = "trying to assemble the object..."
@@ -213,6 +214,7 @@ const (
 	EngineFinishedRemovalOfLocallyredundantCopies                        = "finished removal of locally-redundant copies"
 	EngineRemovingAnObjectWithoutFullLockingCheck                        = "removing an object without full locking check"
 	EngineInterruptProcessingTheExpiredLocks                             = "interrupt processing the expired locks"
+	EngineInterruptGettingLockers                                        = "can't get object's lockers"
 	EngineInterruptProcessingTheDeletedLocks                             = "interrupt processing the deleted locks"
 	EngineFailedToMoveShardInDegradedreadonlyModeMovingToReadonly        = "failed to move shard in degraded-read-only mode, moving to read-only"
 	EngineFailedToMoveShardInReadonlyMode                                = "failed to move shard in read-only mode"

pkg/local_object_storage/engine/delete.go

@@ -76,6 +76,7 @@ func (e *StorageEngine) delete(ctx context.Context, prm DeletePrm) (DeleteRes, e
 		is bool
 	}
 	var splitInfo *objectSDK.SplitInfo
+	var ecInfo *objectSDK.ECInfo
 
 	// Removal of a big object is done in multiple stages:
 	// 1. Remove the parent object. If it is locked or already removed, return immediately.
@@ -91,13 +92,18 @@ func (e *StorageEngine) delete(ctx context.Context, prm DeletePrm) (DeleteRes, e
 			}
 
 			var splitErr *objectSDK.SplitInfoError
-			if !errors.As(err, &splitErr) {
+			var ecErr *objectSDK.ECInfoError
+			if errors.As(err, &splitErr) {
+				splitInfo = splitErr.SplitInfo()
+			} else if errors.As(err, &ecErr) {
+				e.deleteChunks(ctx, sh, ecInfo, prm)
+				return false
+			} else {
 				if !client.IsErrObjectNotFound(err) {
 					e.reportShardError(sh, "could not check object existence", err)
 				}
 				return false
 			}
-			splitInfo = splitErr.SplitInfo()
 		} else if !resExists.Exists() {
 			return false
 		}
@@ -171,3 +177,31 @@ func (e *StorageEngine) deleteChildren(ctx context.Context, addr oid.Address, fo
 		return false
 	})
 }
+
+func (e *StorageEngine) deleteChunks(
+	ctx context.Context, sh hashedShard, ecInfo *objectSDK.ECInfo, prm DeletePrm,
+) {
+	var inhumePrm shard.InhumePrm
+	if prm.forceRemoval {
+		inhumePrm.ForceRemoval()
+	}
+	for _, chunk := range ecInfo.Chunks {
+		var addr oid.Address
+		addr.SetContainer(prm.addr.Container())
+		var objID oid.ID
+		err := objID.ReadFromV2(chunk.ID)
+		if err != nil {
+			e.reportShardError(sh, "could not delete EC chunk", err)
+		}
+		addr.SetObject(objID)
+		inhumePrm.MarkAsGarbage(addr)
+		_, err = sh.Inhume(ctx, inhumePrm)
+		if err != nil {
+			e.log.Debug(logs.EngineCouldNotInhumeObjectInShard,
+				zap.Stringer("addr", addr),
+				zap.String("err", err.Error()),
+				zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
+			continue
+		}
+	}
+}

pkg/local_object_storage/engine/engine_test.go

@@ -17,6 +17,7 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger/test"
 	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	oidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id/test"
 	"git.frostfs.info/TrueCloudLab/hrw"
 	"github.com/panjf2000/ants/v2"
@@ -62,7 +63,7 @@ func benchmarkExists(b *testing.B, shardNum int) {
 	b.ReportAllocs()
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		ok, err := e.exists(context.Background(), addr)
+		ok, _, err := e.exists(context.Background(), addr, oid.Address{})
 		if err != nil || ok {
 			b.Fatalf("%t %v", ok, err)
 		}

pkg/local_object_storage/engine/exists.go

@@ -11,11 +11,13 @@ import (
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 )
 
-func (e *StorageEngine) exists(ctx context.Context, addr oid.Address) (bool, error) {
+func (e *StorageEngine) exists(ctx context.Context, addr oid.Address, parentAddr oid.Address) (bool, bool, error) {
 	var shPrm shard.ExistsPrm
 	shPrm.SetAddress(addr)
+	shPrm.SetParentAddress(parentAddr)
 	alreadyRemoved := false
 	exists := false
+	locked := false
 
 	e.iterateOverSortedShards(addr, func(_ int, sh hashedShard) (stop bool) {
 		res, err := sh.Exists(ctx, shPrm)
@@ -44,13 +46,16 @@ func (e *StorageEngine) exists(ctx context.Context, addr oid.Address) (bool, err
 		if !exists {
 			exists = res.Exists()
 		}
+		if !locked {
+			locked = res.Locked()
+		}
 
 		return false
 	})
 
 	if alreadyRemoved {
-		return false, new(apistatus.ObjectAlreadyRemoved)
+		return false, false, new(apistatus.ObjectAlreadyRemoved)
 	}
 
-	return exists, nil
+	return exists, locked, nil
 }

pkg/local_object_storage/engine/inhume.go

@@ -152,7 +152,8 @@ func (e *StorageEngine) inhumeAddr(ctx context.Context, addr oid.Address, prm sh
 				}
 
 				var siErr *objectSDK.SplitInfoError
-				if !errors.As(err, &siErr) {
+				var ecErr *objectSDK.ECInfoError
+				if !(errors.As(err, &siErr) || errors.As(err, &ecErr)) {
 					e.reportShardError(sh, "could not check for presents in shard", err)
 					return
 				}
@@ -220,6 +221,33 @@ func (e *StorageEngine) IsLocked(ctx context.Context, addr oid.Address) (bool, e
 	return locked, outErr
 }
 
+// GetLocked return lock id's if object is locked according to StorageEngine's state.
+func (e *StorageEngine) GetLocked(ctx context.Context, addr oid.Address) ([]oid.ID, error) {
+	ctx, span := tracing.StartSpanFromContext(ctx, "StorageEngine.GetLocked",
+		trace.WithAttributes(
+			attribute.String("address", addr.EncodeToString()),
+		))
+	defer span.End()
+
+	var locked []oid.ID
+	var outErr error
+
+	e.iterateOverUnsortedShards(func(h hashedShard) (stop bool) {
+		ld, err := h.Shard.GetLocked(ctx, addr)
+		if err != nil {
+			e.reportShardError(h, logs.EngineInterruptGettingLockers, err, zap.Stringer("addr", addr),
+				zap.String("trace_id", tracingPkg.GetTraceID(ctx)))
+			outErr = err
+		}
+		locked = append(locked, ld...)
+		return false
+	})
+	if len(locked) > 0 {
+		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(ctx, addrs)

pkg/local_object_storage/engine/lock.go

@@ -83,7 +83,26 @@ func (e *StorageEngine) lockSingle(ctx context.Context, idCnr cid.ID, locker, lo
 			exRes, err := sh.Exists(ctx, existsPrm)
 			if err != nil {
 				var siErr *objectSDK.SplitInfoError
-				if !errors.As(err, &siErr) {
+				var eiErr *objectSDK.ECInfoError
+				if errors.As(err, &eiErr) {
+					eclocked := []oid.ID{locked}
+					for _, chunk := range eiErr.ECInfo().Chunks {
+						var objID oid.ID
+						err = objID.ReadFromV2(chunk.ID)
+						if err != nil {
+							e.reportShardError(sh, "could not lock object in shard", err)
+							return false
+						}
+						eclocked = append(eclocked, objID)
+					}
+					err = sh.Lock(ctx, idCnr, locker, eclocked)
+					if err != nil {
+						e.reportShardError(sh, "could not lock object in shard", err)
+						return false
+					}
+					root = true
+					return false
+				} else if !errors.As(err, &siErr) {
 					if shard.IsErrObjectExpired(err) {
 						// object is already expired =>
 						// do not lock it

pkg/local_object_storage/engine/put.go

@@ -80,11 +80,29 @@ func (e *StorageEngine) put(ctx context.Context, prm PutPrm) error {
 
 	// In #1146 this check was parallelized, however, it became
 	// much slower on fast machines for 4 shards.
-	_, err := e.exists(ctx, addr)
+	var parent oid.Address
+	if prm.obj.ECHeader() != nil {
+		parent.SetObject(prm.obj.ECHeader().Parent())
+		parent.SetContainer(addr.Container())
+	}
+	existed, locked, err := e.exists(ctx, addr, parent)
 	if err != nil {
 		return err
 	}
 
+	if !existed && locked {
+		lockers, err := e.GetLocked(ctx, parent)
+		if err != nil {
+			return err
+		}
+		for _, locker := range lockers {
+			err = e.lock(ctx, addr.Container(), locker, []oid.ID{addr.Object()})
+			if err != nil {
+				return err
+			}
+		}
+	}
+
 	var shRes putToShardRes
 	e.iterateOverSortedShards(addr, func(_ int, sh hashedShard) (stop bool) {
 		e.mtx.RLock()

pkg/local_object_storage/metabase/delete.go

@@ -267,8 +267,10 @@ func (db *DB) delete(tx *bbolt.Tx, addr oid.Address, refCounter referenceCounter
 			return deleteSingleResult{}, nil
 		}
 		var siErr *objectSDK.SplitInfoError
-		if errors.As(err, &siErr) {
+		var ecErr *objectSDK.ECInfoError
+		if errors.As(err, &siErr) || errors.As(err, &ecErr) {
 			// if object is virtual (parent) then do nothing, it will be deleted with last child
+			// if object is erasure-coded it will be deleted with the last chunk presented on the shard
 			return deleteSingleResult{}, nil
 		}
 
@@ -471,6 +473,46 @@ func delUniqueIndexes(tx *bbolt.Tx, obj *objectSDK.Object, isParent bool) error
 		name: rootBucketName(cnr, bucketName),
 		key:  objKey,
 	})
+	if obj.ECHeader() != nil {
+		err := delECInfo(tx, cnr, objKey, obj.ECHeader())
+		if err != nil {
+			return err
+		}
+	}
 
 	return nil
 }
+
+func delECInfo(tx *bbolt.Tx, cnr cid.ID, objKey []byte, ecHead *objectSDK.ECHeader) error {
+	parentID := objectKey(ecHead.Parent(), make([]byte, objectKeySize))
+	bucketName := make([]byte, bucketKeySize)
+
+	val := getFromBucket(tx, ecInfoBucketName(cnr, bucketName), parentID)
+	if len(val) > 0 {
+		if bytes.Equal(val, objKey) {
+			delUniqueIndexItem(tx, namedBucketItem{
+				name: ecInfoBucketName(cnr, bucketName),
+				key:  parentID,
+			})
+		} else {
+			val = bytes.Clone(val)
+			offset := 0
+			for offset < len(val) {
+				if bytes.Equal(objKey, val[offset:offset+objectKeySize]) {
+					val = append(val[:offset], val[offset+objectKeySize:]...)
+					break
+				}
+				offset += objectKeySize
+			}
+			err := putUniqueIndexItem(tx, namedBucketItem{
+				name: ecInfoBucketName(cnr, make([]byte, bucketKeySize)),
+				key:  parentID,
+				val:  val,
+			})
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

pkg/local_object_storage/metabase/exists.go

@@ -20,12 +20,14 @@ import (
 
 // ExistsPrm groups the parameters of Exists operation.
 type ExistsPrm struct {
-	addr oid.Address
+	addr  oid.Address
+	paddr oid.Address
 }
 
 // ExistsRes groups the resulting values of Exists operation.
 type ExistsRes struct {
 	exists bool
+	locked bool
 }
 
 var ErrLackSplitInfo = logicerr.New("no split info on parent object")
@@ -35,11 +37,21 @@ func (p *ExistsPrm) SetAddress(addr oid.Address) {
 	p.addr = addr
 }
 
+// SetParent is an Exists option to set objects parent.
+func (p *ExistsPrm) SetParent(addr oid.Address) {
+	p.paddr = addr
+}
+
 // Exists returns the fact that the object is in the metabase.
 func (p ExistsRes) Exists() bool {
 	return p.exists
 }
 
+// Locked returns the fact that the object is locked.
+func (p ExistsRes) Locked() bool {
+	return p.locked
+}
+
 // Exists returns ErrAlreadyRemoved if addr was marked as removed. Otherwise it
 // returns true if addr is in primary index or false if it is not.
 //
@@ -70,7 +82,7 @@ func (db *DB) Exists(ctx context.Context, prm ExistsPrm) (res ExistsRes, err err
 	currEpoch := db.epochState.CurrentEpoch()
 
 	err = db.boltDB.View(func(tx *bbolt.Tx) error {
-		res.exists, err = db.exists(tx, prm.addr, currEpoch)
+		res.exists, res.locked, err = db.exists(tx, prm.addr, prm.paddr, currEpoch)
 
 		return err
 	})
@@ -78,15 +90,19 @@ func (db *DB) Exists(ctx context.Context, prm ExistsPrm) (res ExistsRes, err err
 	return res, metaerr.Wrap(err)
 }
 
-func (db *DB) exists(tx *bbolt.Tx, addr oid.Address, currEpoch uint64) (exists bool, err error) {
+func (db *DB) exists(tx *bbolt.Tx, addr oid.Address, parent oid.Address, currEpoch uint64) (bool, bool, error) {
+	var locked bool
+	if !parent.Equals(oid.Address{}) {
+		locked = objectLocked(tx, parent.Container(), parent.Object())
+	}
 	// check graveyard and object expiration first
 	switch objectStatus(tx, addr, currEpoch) {
 	case 1:
-		return false, logicerr.Wrap(new(apistatus.ObjectNotFound))
+		return false, locked, logicerr.Wrap(new(apistatus.ObjectNotFound))
 	case 2:
-		return false, logicerr.Wrap(new(apistatus.ObjectAlreadyRemoved))
+		return false, locked, logicerr.Wrap(new(apistatus.ObjectAlreadyRemoved))
 	case 3:
-		return false, ErrObjectIsExpired
+		return false, locked, ErrObjectIsExpired
 	}
 
 	objKey := objectKey(addr.Object(), make([]byte, objectKeySize))
@@ -96,25 +112,25 @@ func (db *DB) exists(tx *bbolt.Tx, addr oid.Address, currEpoch uint64) (exists b
 
 	// if graveyard is empty, then check if object exists in primary bucket
 	if inBucket(tx, primaryBucketName(cnr, key), objKey) {
-		return true, nil
+		return true, locked, nil
 	}
 
 	// if primary bucket is empty, then check if object exists in parent bucket
 	if inBucket(tx, parentBucketName(cnr, key), objKey) {
 		splitInfo, err := getSplitInfo(tx, cnr, objKey)
 		if err != nil {
-			return false, err
+			return false, locked, err
 		}
 
-		return false, logicerr.Wrap(objectSDK.NewSplitInfoError(splitInfo))
+		return false, locked, logicerr.Wrap(objectSDK.NewSplitInfoError(splitInfo))
 	}
 	// if parent bucket is empty, then check if object exists in ec bucket
 	if data := getFromBucket(tx, ecInfoBucketName(cnr, key), objKey); len(data) != 0 {
-		return false, getECInfoError(tx, cnr, data)
+		return false, locked, getECInfoError(tx, cnr, data)
 	}
 
 	// if parent bucket is empty, then check if object exists in typed buckets
-	return firstIrregularObjectType(tx, cnr, objKey) != objectSDK.TypeRegular, nil
+	return firstIrregularObjectType(tx, cnr, objKey) != objectSDK.TypeRegular, locked, nil
 }
 
 // objectStatus returns:

pkg/local_object_storage/metabase/inhume.go

@@ -229,11 +229,17 @@ func (db *DB) inhumeTx(tx *bbolt.Tx, epoch uint64, prm InhumePrm, res *InhumeRes
 
 		obj, err := db.get(tx, prm.target[i], buf, false, true, epoch)
 		targetKey := addressKey(prm.target[i], buf)
+		var ecErr *objectSDK.ECInfoError
 		if err == nil {
 			err = db.updateDeleteInfo(tx, garbageBKT, graveyardBKT, targetKey, cnr, obj, res)
 			if err != nil {
 				return err
 			}
+		} else if errors.As(err, &ecErr) {
+			err = db.inhumeECInfo(tx, epoch, prm.tomb, res, garbageBKT, graveyardBKT, ecErr.ECInfo(), cnr, bkt, value, targetKey)
+			if err != nil {
+				return err
+			}
 		}
 
 		if prm.tomb != nil {
@@ -272,6 +278,43 @@ func (db *DB) inhumeTx(tx *bbolt.Tx, epoch uint64, prm InhumePrm, res *InhumeRes
 	return db.applyInhumeResToCounters(tx, res)
 }
 
+func (db *DB) inhumeECInfo(tx *bbolt.Tx, epoch uint64, tomb *oid.Address, res *InhumeRes,
+	garbageBKT *bbolt.Bucket, graveyardBKT *bbolt.Bucket,
+	ecInfo *objectSDK.ECInfo, cnr cid.ID, targetBucket *bbolt.Bucket, value []byte, targetKey []byte,
+) error {
+	for _, chunk := range ecInfo.Chunks {
+		chunkBuf := make([]byte, addressKeySize)
+		var chunkAddr oid.Address
+		chunkAddr.SetContainer(cnr)
+		var chunkID oid.ID
+		err := chunkID.ReadFromV2(chunk.ID)
+		if err != nil {
+			return err
+		}
+		chunkAddr.SetObject(chunkID)
+		chunkObj, err := db.get(tx, chunkAddr, chunkBuf, false, true, epoch)
+		if err != nil {
+			return err
+		}
+		err = db.updateDeleteInfo(tx, garbageBKT, graveyardBKT, targetKey, cnr, chunkObj, res)
+		if err != nil {
+			return err
+		}
+		chunkKey := addressKey(chunkAddr, chunkBuf)
+		if tomb != nil {
+			_, err = db.markAsGC(graveyardBKT, garbageBKT, chunkKey)
+			if err != nil {
+				return err
+			}
+		}
+		err = targetBucket.Put(chunkKey, value)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func (db *DB) applyInhumeResToCounters(tx *bbolt.Tx, res *InhumeRes) error {
 	if err := db.updateShardObjectCounter(tx, logical, res.LogicInhumed(), false); err != nil {
 		return err

pkg/local_object_storage/metabase/lock.go

@@ -175,6 +175,31 @@ func objectLocked(tx *bbolt.Tx, idCnr cid.ID, idObj oid.ID) bool {
 	return false
 }
 
+// return `LOCK` id's if specified object is locked in the specified container.
+func getLocked(tx *bbolt.Tx, idCnr cid.ID, idObj oid.ID) ([]oid.ID, error) {
+	var lockers []oid.ID
+	bucketLocked := tx.Bucket(bucketNameLocked)
+	if bucketLocked != nil {
+		key := make([]byte, cidSize)
+		idCnr.Encode(key)
+		bucketLockedContainer := bucketLocked.Bucket(key)
+		if bucketLockedContainer != nil {
+			binObjIDs, err := decodeList(bucketLockedContainer.Get(objectKey(idObj, key)))
+			if err != nil {
+				return nil, fmt.Errorf("decode list of object lockers: %w", err)
+			}
+			for _, binObjID := range binObjIDs {
+				var id oid.ID
+				if err = id.Decode(binObjID); err != nil {
+					return nil, err
+				}
+				lockers = append(lockers, id)
+			}
+		}
+	}
+	return lockers, nil
+}
+
 // releases all records about the objects locked by the locker.
 // Returns slice of unlocked object ID's or an error.
 //
@@ -325,3 +350,36 @@ func (db *DB) IsLocked(ctx context.Context, prm IsLockedPrm) (res IsLockedRes, e
 	success = err == nil
 	return res, err
 }
+
+// GetLocked return `LOCK` id's if 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) GetLocked(ctx context.Context, addr oid.Address) (res []oid.ID, err error) {
+	var (
+		startedAt = time.Now()
+		success   = false
+	)
+	defer func() {
+		db.metrics.AddMethodDuration("GetLocked", time.Since(startedAt), success)
+	}()
+
+	_, span := tracing.StartSpanFromContext(ctx, "metabase.GetLocked",
+		trace.WithAttributes(
+			attribute.String("address", addr.EncodeToString()),
+		))
+	defer span.End()
+
+	db.modeMtx.RLock()
+	defer db.modeMtx.RUnlock()
+
+	if db.mode.NoMetabase() {
+		return res, ErrDegradedMode
+	}
+	err = metaerr.Wrap(db.boltDB.View(func(tx *bbolt.Tx) error {
+		res, err = getLocked(tx, addr.Container(), addr.Object())
+		return nil
+	}))
+	success = err == nil
+	return res, err
+}

pkg/local_object_storage/metabase/put.go

@@ -115,7 +115,7 @@ func (db *DB) put(tx *bbolt.Tx,
 
 	isParent := si != nil
 
-	exists, err := db.exists(tx, objectCore.AddressOf(obj), currEpoch)
+	exists, _, err := db.exists(tx, objectCore.AddressOf(obj), oid.Address{}, currEpoch)
 
 	var splitInfoError *objectSDK.SplitInfoError
 	if errors.As(err, &splitInfoError) {

pkg/local_object_storage/metabase/select.go

@@ -428,7 +428,7 @@ func (db *DB) selectObjectID(
 		addr.SetObject(id)
 
 		var splitInfoError *objectSDK.SplitInfoError
-		ok, err := db.exists(tx, addr, currEpoch)
+		ok, _, err := db.exists(tx, addr, oid.Address{}, currEpoch)
 		if (err == nil && ok) || errors.As(err, &splitInfoError) {
 			raw := make([]byte, objectKeySize)
 			id.Encode(raw)

pkg/local_object_storage/shard/exists.go

@@ -13,12 +13,14 @@ import (
 
 // ExistsPrm groups the parameters of Exists operation.
 type ExistsPrm struct {
-	addr oid.Address
+	addr  oid.Address
+	paddr oid.Address
 }
 
 // ExistsRes groups the resulting values of Exists operation.
 type ExistsRes struct {
 	ex bool
+	lc bool
 }
 
 // SetAddress is an Exists option to set object checked for existence.
@@ -26,11 +28,21 @@ func (p *ExistsPrm) SetAddress(addr oid.Address) {
 	p.addr = addr
 }
 
+// SetParentAddress is an Exists option to set parent object checked for existence.
+func (p *ExistsPrm) SetParentAddress(addr oid.Address) {
+	p.paddr = addr
+}
+
 // Exists returns the fact that the object is in the shard.
 func (p ExistsRes) Exists() bool {
 	return p.ex
 }
 
+// Locked returns the fact that the object is locked.
+func (p ExistsRes) Locked() bool {
+	return p.lc
+}
+
 // Exists checks if object is presented in shard.
 //
 // Returns any error encountered that does not allow to
@@ -48,6 +60,7 @@ func (s *Shard) Exists(ctx context.Context, prm ExistsPrm) (ExistsRes, error) {
 	defer span.End()
 
 	var exists bool
+	var locked bool
 	var err error
 
 	s.m.RLock()
@@ -65,13 +78,16 @@ func (s *Shard) Exists(ctx context.Context, prm ExistsPrm) (ExistsRes, error) {
 	} else {
 		var existsPrm meta.ExistsPrm
 		existsPrm.SetAddress(prm.addr)
+		existsPrm.SetParent(prm.paddr)
 
 		var res meta.ExistsRes
 		res, err = s.metaBase.Exists(ctx, existsPrm)
 		exists = res.Exists()
+		locked = res.Locked()
 	}
 
 	return ExistsRes{
 		ex: exists,
+		lc: locked,
 	}, err
 }

pkg/local_object_storage/shard/lock.go

@@ -71,3 +71,20 @@ func (s *Shard) IsLocked(ctx context.Context, addr oid.Address) (bool, error) {
 
 	return res.Locked(), nil
 }
+
+// GetLocked return lock id's of the provided object. Not found object is
+// considered as not locked. Requires healthy metabase, returns ErrDegradedMode otherwise.
+func (s *Shard) GetLocked(ctx context.Context, addr oid.Address) ([]oid.ID, error) {
+	ctx, span := tracing.StartSpanFromContext(ctx, "Shard.GetLocked",
+		trace.WithAttributes(
+			attribute.String("shard_id", s.ID().String()),
+			attribute.String("address", addr.EncodeToString()),
+		))
+	defer span.End()
+
+	m := s.GetMode()
+	if m.NoMetabase() {
+		return nil, ErrDegradedMode
+	}
+	return s.metaBase.GetLocked(ctx, addr)
+}

pkg/services/object/delete/exec.go

@@ -2,6 +2,7 @@ package deletesvc
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"strconv"
 
@@ -64,9 +65,32 @@ func (exec *execCtx) newAddress(id oid.ID) oid.Address {
 	return a
 }
 
-func (exec *execCtx) formSplitInfo(ctx context.Context) error {
+func (exec *execCtx) formExtendedInfo(ctx context.Context) error {
-	var err error
+	_, err := exec.svc.header.head(ctx, exec)
-	exec.splitInfo, err = exec.svc.header.splitInfo(ctx, exec)
+
+	var errSplitInfo *objectSDK.SplitInfoError
+	var errECInfo *objectSDK.ECInfoError
+
+	switch {
+	case err == nil:
+		return nil
+	case errors.As(err, &errSplitInfo):
+		exec.splitInfo = errSplitInfo.SplitInfo()
+		exec.tombstone.SetSplitID(exec.splitInfo.SplitID())
+
+		exec.log.Debug(logs.DeleteSplitInfoSuccessfullyFormedCollectingMembers)
+
+		if err := exec.collectMembers(ctx); err != nil {
+			return err
+		}
+
+		exec.log.Debug(logs.DeleteMembersSuccessfullyCollected)
+		return nil
+	case errors.As(err, &errECInfo):
+		exec.log.Debug(logs.DeleteECObjectReceived)
+		return nil
+	}
+
 	if err != nil && !apiclient.IsErrObjectAlreadyRemoved(err) {
 		// IsErrObjectAlreadyRemoved check is required because splitInfo
 		// implicitly performs Head request that may return ObjectAlreadyRemoved

pkg/services/object/delete/local.go

@@ -35,19 +35,9 @@ func (exec *execCtx) formTombstone(ctx context.Context) error {
 
 	exec.log.Debug(logs.DeleteFormingSplitInfo)
 
-	if err := exec.formSplitInfo(ctx); err != nil {
+	if err := exec.formExtendedInfo(ctx); err != nil {
-		return fmt.Errorf("form split info: %w", err)
+		return fmt.Errorf("form extended info: %w", err)
 	}
 
-	exec.log.Debug(logs.DeleteSplitInfoSuccessfullyFormedCollectingMembers)
-
-	exec.tombstone.SetSplitID(exec.splitInfo.SplitID())
-
-	if err := exec.collectMembers(ctx); err != nil {
-		return err
-	}
-
-	exec.log.Debug(logs.DeleteMembersSuccessfullyCollected)
-
 	return exec.initTombstoneObject()
 }

pkg/services/object/delete/service.go

@@ -41,7 +41,7 @@ type cfg struct {
 
 	header interface {
 		// must return (nil, nil) for PHY objects
-		splitInfo(context.Context, *execCtx) (*objectSDK.SplitInfo, error)
+		head(context.Context, *execCtx) (*objectSDK.Object, error)
 
 		children(context.Context, *execCtx) ([]oid.ID, error)
 

pkg/services/object/delete/util.go

@@ -2,7 +2,6 @@ package deletesvc
 
 import (
 	"context"
-	"errors"
 
 	getsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/get"
 	putsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/put"
@@ -44,19 +43,8 @@ func (w *headSvcWrapper) headAddress(ctx context.Context, exec *execCtx, addr oi
 	return wr.Object(), nil
 }
 
-func (w *headSvcWrapper) splitInfo(ctx context.Context, exec *execCtx) (*objectSDK.SplitInfo, error) {
+func (w *headSvcWrapper) head(ctx context.Context, exec *execCtx) (*objectSDK.Object, error) {
-	_, err := w.headAddress(ctx, exec, exec.address())
+	return w.headAddress(ctx, exec, exec.address())
-
-	var errSplitInfo *objectSDK.SplitInfoError
-
-	switch {
-	case err == nil:
-		return nil, nil
-	case errors.As(err, &errSplitInfo):
-		return errSplitInfo.SplitInfo(), nil
-	default:
-		return nil, err
-	}
 }
 
 func (w *headSvcWrapper) children(ctx context.Context, exec *execCtx) ([]oid.ID, error) {