[#412] Store creation epoch of delete markers

Signed-off-by: Marina Biryukova <m.biryukova@yadro.com>

api/handler/delete.go

@@ -81,10 +81,17 @@ func (h *handler) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	networkInfo, err := h.obj.GetNetworkInfo(ctx)
+	if err != nil {
+		h.logAndSendError(w, "could not get network info", reqInfo, err)
+		return
+	}
+
 	p := &layer.DeleteObjectParams{
 		BktInfo:     bktInfo,
 		Objects:     versionedObject,
 		Settings:    bktSettings,
+		NetworkInfo: networkInfo,
 	}
 	deletedObjects := h.obj.DeleteObjects(ctx, p)
 	deletedObject := deletedObjects[0]
@@ -181,10 +188,17 @@ func (h *handler) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Re
 		return
 	}
 
+	networkInfo, err := h.obj.GetNetworkInfo(ctx)
+	if err != nil {
+		h.logAndSendError(w, "could not get network info", reqInfo, err)
+		return
+	}
+
 	p := &layer.DeleteObjectParams{
 		BktInfo:     bktInfo,
 		Objects:     toRemove,
 		Settings:    bktSettings,
+		NetworkInfo: networkInfo,
 		IsMultiple:  true,
 	}
 	deletedObjects := h.obj.DeleteObjects(ctx, p)

api/layer/layer.go

@@ -125,6 +125,7 @@ type (
 		BktInfo     *data.BucketInfo
 		Objects     []*VersionedObject
 		Settings    *data.BucketSettings
+		NetworkInfo netmap.NetworkInfo
 		IsMultiple  bool
 	}
 
@@ -541,7 +542,8 @@ func getRandomOID() (oid.ID, error) {
 	return objID, nil
 }
 
-func (n *Layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings *data.BucketSettings, obj *VersionedObject) *VersionedObject {
+func (n *Layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings *data.BucketSettings, obj *VersionedObject,
+	networkInfo netmap.NetworkInfo) *VersionedObject {
 	if len(obj.VersionID) != 0 || settings.Unversioned() {
 		var nodeVersions []*data.NodeVersion
 		if nodeVersions, obj.Error = n.getNodeVersionsToDelete(ctx, bkt, obj); obj.Error != nil {
@@ -623,6 +625,7 @@ func (n *Layer) deleteObject(ctx context.Context, bkt *data.BucketInfo, settings
 			Created:        &now,
 			Owner:          &n.gateOwner,
 			IsDeleteMarker: true,
+			CreationEpoch:  networkInfo.CurrentEpoch(),
 		},
 		IsUnversioned: settings.VersioningSuspended(),
 	}
@@ -765,7 +768,7 @@ func (n *Layer) removeCombinedObject(ctx context.Context, bkt *data.BucketInfo,
 // DeleteObjects from the storage.
 func (n *Layer) DeleteObjects(ctx context.Context, p *DeleteObjectParams) []*VersionedObject {
 	for i, obj := range p.Objects {
-		p.Objects[i] = n.deleteObject(ctx, p.BktInfo, p.Settings, obj)
+		p.Objects[i] = n.deleteObject(ctx, p.BktInfo, p.Settings, obj, p.NetworkInfo)
 		if p.IsMultiple && p.Objects[i].Error != nil {
 			n.reqLogger(ctx).Error(logs.CouldntDeleteObject, zap.String("object", obj.String()), zap.Error(p.Objects[i].Error))
 		}
@@ -819,3 +822,12 @@ func (n *Layer) DeleteBucket(ctx context.Context, p *DeleteBucketParams) error {
 	n.cache.DeleteBucket(p.BktInfo)
 	return n.frostFS.DeleteContainer(ctx, p.BktInfo.CID, p.SessionToken)
 }
+
+func (n *Layer) GetNetworkInfo(ctx context.Context) (netmap.NetworkInfo, error) {
+	networkInfo, err := n.frostFS.NetworkInfo(ctx)
+	if err != nil {
+		return networkInfo, fmt.Errorf("get network info: %w", err)
+	}
+
+	return networkInfo, nil
+}