Merge pull request #1515 from giuseppe/backport-unknown-fs-1.45

[1.45] overlay: allow unknown backing fs with mountProgram
containers · Feb 23, 2023 · e4b939f · e4b939f
2 parents f8ede14 + 1e7d3fa
commit e4b939f
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/drivers/overlay/overlay.go b/drivers/overlay/overlay.go
@@ -314,7 +314,10 @@ func Init(home string, options graphdriver.Options) (graphdriver.Driver, error)
 	}
 	fsName, ok := graphdriver.FsNames[fsMagic]
 	if !ok {
-		return nil, fmt.Errorf("filesystem type %#x reported for %s is not supported with 'overlay': %w", fsMagic, filepath.Dir(home), graphdriver.ErrIncompatibleFS)
+		if opts.mountProgram == "" {
+			return nil, fmt.Errorf("filesystem type %#x reported for %s is not supported with 'overlay': %w", fsMagic, filepath.Dir(home), graphdriver.ErrIncompatibleFS)
+		}
+		fsName = "<unknown>"
 	}
 	backingFs = fsName