added fs encryption overlay

pkg/provider/interface.go

@@ -4,6 +4,7 @@ package provider
 
 import (
 	"errors"
+	"io"
 	"io/fs"
 	"os"
 )
@@ -34,16 +35,17 @@ func WalkFS(fs FS) fs.FS {
 }
 
 type File interface {
+	io.Reader
+	io.ReaderAt
+	io.Writer
+	io.WriterAt
+	io.Seeker
+	io.Closer
 	Name() string
 	Stat() (fs.FileInfo, error)
 	Truncate(int64) error
 	Sync() error
 	Fd() uintptr
 	ReadDir(int) ([]fs.DirEntry, error)
-	Read([]byte) (int, error)
-	ReadAt([]byte, int64) (int, error)
-	WriteAt([]byte, int64) (int, error)
-	Seek(int64, int) (int64, error)
 	Readdir(int) ([]fs.FileInfo, error)
-	Close() error
 }