1 files changed, 57 insertions, 0 deletions
diff --git a/object/storer/packed/store_open_pack.go b/object/storer/packed/store_open_pack.go
new file mode 100644
index 00000000..c621e08c
--- /dev/null
+++ b/object/storer/packed/store_open_pack.go
@@ -0,0 +1,57 @@
+package packed
+
+// openPack returns one opened and validated pack handle.
+func (store *Store) openPack(name string) (*packFile, error) {
+	store.stateMu.RLock()
+
+	pack, ok := store.packs[name]
+	if ok {
+		store.stateMu.RUnlock()
+
+		return pack, nil
+	}
+
+	store.stateMu.RUnlock()
+
+	file, err := store.root.Open(name)
+	if err != nil {
+		return nil, err
+	}
+
+	info, err := file.Stat()
+	if err != nil {
+		_ = file.Close()
+
+		return nil, err
+	}
+
+	pack, err = openPackFile(name, file, info.Size())
+	if err != nil {
+		_ = file.Close()
+
+		return nil, err
+	}
+
+	err = store.verifyPackMatchesIndexes(pack)
+	if err != nil {
+		_ = pack.close()
+
+		return nil, err
+	}
+
+	store.stateMu.Lock()
+
+	existing, ok := store.packs[name]
+	if ok {
+		store.stateMu.Unlock()
+
+		_ = pack.close()
+
+		return existing, nil
+	}
+
+	store.packs[name] = pack
+	store.stateMu.Unlock()
+
+	return pack, nil
+}