[#1144] metabase: Support ec parent filter for `Search`

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

pkg/local_object_storage/metabase/db.go

@@ -262,7 +262,7 @@ func unknownMatcherBucket(_ *bbolt.Bucket, _ string, _ string, _ func([]byte, []
 // in boltDB. Useful for getting filter values from unique and list indexes.
 func bucketKeyHelper(hdr string, val string) []byte {
 	switch hdr {
-	case v2object.FilterHeaderParent:
+	case v2object.FilterHeaderParent, v2object.FilterHeaderECParent:
 		v, err := base58.Decode(val)
 		if err != nil {
 			return nil

pkg/local_object_storage/metabase/put.go

@@ -323,6 +323,17 @@ func updateListIndexes(tx *bbolt.Tx, obj *objectSDK.Object, f updateIndexItemFun
 		}
 	}
 
+	if ech := obj.ECHeader(); ech != nil {
+		err := f(tx, namedBucketItem{
+			name: ecParentToChunksBucketName(cnr, bucketName),
+			key:  objectKey(ech.Parent(), make([]byte, objectKeySize)),
+			val:  objKey,
+		})
+		if err != nil {
+			return err
+		}
+	}
+
 	return nil
 }
 

pkg/local_object_storage/metabase/select.go

@@ -211,6 +211,9 @@ func (db *DB) selectFastFilter(
 	case v2object.FilterHeaderSplitID:
 		bucketName := splitBucketName(cnr, bucketName)
 		db.selectFromList(tx, bucketName, f, to, fNum)
+	case v2object.FilterHeaderECParent:
+		bucketName := ecParentToChunksBucketName(cnr, bucketName)
+		db.selectFromList(tx, bucketName, f, to, fNum)
 	case v2object.FilterPropertyRoot:
 		selectAllFromBucket(tx, rootBucketName(cnr, bucketName), to, fNum)
 	case v2object.FilterPropertyPhy:

pkg/local_object_storage/metabase/util.go

@@ -124,6 +124,12 @@ const (
 	//	Key: container ID + type
 	//  Value: Object id
 	ecInfoPrefix
+
+	// ecParentToChunksPrefix is used to store a relation between EC parent ID and chunks,
+	// but unlike for ecInfoPrefix the list of chunk IDs is encoded with encodeList.
+	//  Key: EC parent ID
+	//  Value: list of EC chunk IDs
+	ecParentToChunksPrefix
 )
 
 const (
@@ -200,6 +206,11 @@ func ecInfoBucketName(cnr cid.ID, key []byte) []byte {
 	return bucketName(cnr, ecInfoPrefix, key)
 }
 
+// ecParentToChunksBucketName returns <CID>_ecParentToChunks.
+func ecParentToChunksBucketName(cnr cid.ID, key []byte) []byte {
+	return bucketName(cnr, ecParentToChunksPrefix, key)
+}
+
 // addressKey returns key for K-V tables when key is a whole address.
 func addressKey(addr oid.Address, key []byte) []byte {
 	addr.Container().Encode(key)