[#262] meta: Do not return old expired objects

Signed-off-by: Pavel Karpy <p.karpy@yadro.com>

CHANGELOG.md

@@ -8,6 +8,7 @@ Changelog for FrostFS Node
 ### Fixed
 - Take network settings into account during netmap contract update (#100)
 - Read config files from dir even if config file not provided via `--config` for node (#238)
+- Expired by more than 1 epoch objects could be returned (#262) 
 
 ### Removed
 ### Updated

pkg/local_object_storage/metabase/db_test.go

@@ -73,6 +73,13 @@ func checkExpiredObjects(t *testing.T, db *meta.DB, f func(exp, nonExp *objectSD
 	require.NoError(t, metaPut(db, nonExpObj, nil))
 
 	f(expObj, nonExpObj)
+
+	oldExpObj := testutil.GenerateObject()
+	setExpiration(oldExpObj, 1)
+
+	require.NoError(t, metaPut(db, oldExpObj, nil))
+
+	f(oldExpObj, nonExpObj)
 }
 
 func setExpiration(o *objectSDK.Object, epoch uint64) {

pkg/local_object_storage/metabase/get.go

@@ -66,13 +66,24 @@ func (db *DB) Get(ctx context.Context, prm GetPrm) (res GetRes, err error) {
 	}
 
 	currEpoch := db.epochState.CurrentEpoch()
+	var obj *objectSDK.Object
 
 	err = db.boltDB.View(func(tx *bbolt.Tx) error {
 		key := make([]byte, addressKeySize)
-		res.hdr, err = db.get(tx, prm.addr, key, true, prm.raw, currEpoch)
+		obj, err = db.get(tx, prm.addr, key, true, prm.raw, currEpoch)
 
 		return err
 	})
+	if err != nil {
+		return
+	}
+
+	err = validate(obj, currEpoch)
+	if err != nil {
+		return
+	}
+
+	res.hdr = obj
 
 	return
 }

pkg/local_object_storage/metabase/util.go

@@ -4,7 +4,9 @@ import (
 	"bytes"
 	"crypto/sha256"
 	"fmt"
+	"strconv"
 
+	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
@@ -259,3 +261,26 @@ func isLockObject(tx *bbolt.Tx, idCnr cid.ID, obj oid.ID) bool {
 		bucketNameLockers(idCnr, make([]byte, bucketKeySize)),
 		objectKey(obj, make([]byte, objectKeySize)))
 }
+
+// performs object validity checks.
+func validate(obj *object.Object, currEpoch uint64) error {
+	for _, a := range obj.Attributes() {
+		if key := a.Key(); key != objectV2.SysAttributeExpEpoch && key != objectV2.SysAttributeExpEpochNeoFS {
+			continue
+		}
+
+		expEpoch, err := strconv.ParseUint(a.Value(), 10, 64)
+		if err != nil {
+			// unexpected for already stored and valudated objects
+			return fmt.Errorf("expiration epoch parsing: %w", err)
+		}
+
+		if expEpoch < currEpoch {
+			return ErrObjectIsExpired
+		}
+
+		break
+	}
+
+	return nil
+}