[#1493] metabase: Merge Inhume() and DropGraves() for tombstones

DropGraves() is only used to drop gravemarks after a tombstone
removal. Thus, it makes sense to do Inhume() and DropGraves() in one
transaction. It has less overhead and no unexpected problems in case
of sudden power failure.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/local_object_storage/metabase/delete_ec_test.go

@@ -130,17 +130,9 @@ func TestDeleteECObject_WithoutSplit(t *testing.T) {
 	require.NoError(t, db.IterateOverGraveyard(context.Background(), graveyardIterationPrm))
 	require.Equal(t, 2, len(tombstonedObjects))
 
-	var tombstones []oid.Address
+	_, err = db.InhumeTombstones(context.Background(), tombstonedObjects)
-	for _, tss := range tombstonedObjects {
-		tombstones = append(tombstones, tss.tomb)
-	}
-	inhumePrm.SetAddresses(tombstones...)
-	inhumePrm.SetGCMark()
-	_, err = db.Inhume(context.Background(), inhumePrm)
 	require.NoError(t, err)
 
-	require.NoError(t, db.DropGraves(context.Background(), tombstonedObjects))
-
 	// GC finds tombstone as garbage and deletes it
 
 	garbageAddresses = nil
@@ -374,17 +366,9 @@ func testDeleteECObjectWithSplit(t *testing.T, chunksCount int, withLinking bool
 	require.NoError(t, db.IterateOverGraveyard(context.Background(), graveyardIterationPrm))
 	require.True(t, len(tombstonedObjects) == parentCount+chunksCount)
 
-	var tombstones []oid.Address
+	_, err = db.InhumeTombstones(context.Background(), tombstonedObjects)
-	for _, tss := range tombstonedObjects {
-		tombstones = append(tombstones, tss.tomb)
-	}
-	inhumePrm.SetAddresses(tombstones...)
-	inhumePrm.SetGCMark()
-	_, err = db.Inhume(context.Background(), inhumePrm)
 	require.NoError(t, err)
 
-	require.NoError(t, db.DropGraves(context.Background(), tombstonedObjects))
-
 	// GC finds tombstone as garbage and deletes it
 
 	garbageAddresses = nil

pkg/local_object_storage/metabase/graveyard.go

@@ -9,6 +9,7 @@ import (
 
 	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/metaerr"
 	"git.frostfs.info/TrueCloudLab/frostfs-observability/tracing"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"go.etcd.io/bbolt"
 )
@@ -255,46 +256,58 @@ func graveFromKV(k, v []byte) (res TombstonedObject, err error) {
 	return
 }
 
-// DropGraves deletes tombstoned objects from the
+// InhumeTombstones deletes tombstoned objects from the
 // graveyard bucket.
 //
 // Returns any error appeared during deletion process.
-func (db *DB) DropGraves(ctx context.Context, tss []TombstonedObject) error {
+func (db *DB) InhumeTombstones(ctx context.Context, tss []TombstonedObject) (InhumeRes, error) {
 	var (
 		startedAt = time.Now()
 		success   = false
 	)
 	defer func() {
-		db.metrics.AddMethodDuration("DropGraves", time.Since(startedAt), success)
+		db.metrics.AddMethodDuration("InhumeTombstones", time.Since(startedAt), success)
 	}()
 
-	_, span := tracing.StartSpanFromContext(ctx, "metabase.DropGraves")
+	_, span := tracing.StartSpanFromContext(ctx, "metabase.InhumeTombstones")
 	defer span.End()
 
 	db.modeMtx.RLock()
 	defer db.modeMtx.RUnlock()
 
 	if db.mode.NoMetabase() {
-		return ErrDegradedMode
+		return InhumeRes{}, ErrDegradedMode
 	} else if db.mode.ReadOnly() {
-		return ErrReadOnlyMode
+		return InhumeRes{}, ErrReadOnlyMode
 	}
 
 	buf := make([]byte, addressKeySize)
+	prm := InhumePrm{forceRemoval: true}
+	currEpoch := db.epochState.CurrentEpoch()
 
-	return db.boltDB.Batch(func(tx *bbolt.Tx) error {
+	var res InhumeRes
-		bkt := tx.Bucket(graveyardBucketName)
+
-		if bkt == nil {
+	err := db.boltDB.Batch(func(tx *bbolt.Tx) error {
-			return nil
+		res = InhumeRes{inhumedByCnrID: make(map[cid.ID]ObjectCounters)}
+
+		garbageBKT := tx.Bucket(garbageBucketName)
+		graveyardBKT := tx.Bucket(graveyardBucketName)
+
+		bkt, value, err := db.getInhumeTargetBucketAndValue(garbageBKT, graveyardBKT, prm)
+		if err != nil {
+			return err
 		}
 
-		for _, ts := range tss {
+		for i := range tss {
-			err := bkt.Delete(addressKey(ts.Address(), buf))
+			if err := db.inhumeTxSingle(bkt, value, graveyardBKT, garbageBKT, tss[i].Tombstone(), buf, currEpoch, prm, &res); err != nil {
-			if err != nil {
+				return err
+			}
+			if err := graveyardBKT.Delete(addressKey(tss[i].Address(), buf)); err != nil {
 				return err
 			}
 		}
 
 		return nil
 	})
+	return res, err
 }

pkg/local_object_storage/metabase/graveyard_test.go

@@ -435,7 +435,7 @@ func TestDB_DropGraves(t *testing.T) {
 	require.NoError(t, err)
 	require.Equal(t, 2, counter)
 
-	err = db.DropGraves(context.Background(), buriedTS)
+	_, err = db.InhumeTombstones(context.Background(), buriedTS)
 	require.NoError(t, err)
 
 	counter = 0

pkg/local_object_storage/shard/gc.go

@@ -634,19 +634,7 @@ func (s *Shard) HandleExpiredTombstones(ctx context.Context, tss []meta.Tombston
 		return
 	}
 
-	// Mark tombstones as garbage.
+	res, err := s.metaBase.InhumeTombstones(ctx, tss)
-	var pInhume meta.InhumePrm
-
-	tsAddrs := make([]oid.Address, 0, len(tss))
-	for _, ts := range tss {
-		tsAddrs = append(tsAddrs, ts.Tombstone())
-	}
-
-	pInhume.SetGCMark()
-	pInhume.SetAddresses(tsAddrs...)
-
-	// inhume tombstones
-	res, err := s.metaBase.Inhume(ctx, pInhume)
 	if err != nil {
 		s.log.Warn(ctx, logs.ShardCouldNotMarkTombstonesAsGarbage,
 			zap.String("error", err.Error()),
@@ -666,13 +654,6 @@ func (s *Shard) HandleExpiredTombstones(ctx context.Context, tss []meta.Tombston
 		s.addToContainerSize(delInfo.CID.EncodeToString(), -int64(delInfo.Size))
 		i++
 	}
-
-	// drop just processed expired tombstones
-	// from graveyard
-	err = s.metaBase.DropGraves(ctx, tss)
-	if err != nil {
-		s.log.Warn(ctx, logs.ShardCouldNotDropExpiredGraveRecords, zap.Error(err))
-	}
 }
 
 // HandleExpiredLocks unlocks all objects which were locked by lockers.