Export GenerateID and IDLength from overlay2 graphdriver

We use this from a2o-migrate to get valid layer IDs Signed-off-by: Robert Günzler <robertg@balena.io>
balena-os · Jan 23, 2020 · c94a921 · c94a921
1 parent 153b030
commit c94a921
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git a/daemon/graphdriver/overlay2/overlay.go b/daemon/graphdriver/overlay2/overlay.go
@@ -84,7 +84,7 @@ const (
 	// The idLength should be selected such that following equation
 	// is true (512 is a buffer for label metadata).
 	// ((idLength + len(linkDir) + 1) * maxDepth) <= (pageSize - 512)
-	idLength = 26
+	IDLength = 26
 )
 
 type overlayOptions struct {
@@ -431,7 +431,7 @@ func (d *Driver) create(id, parent string, opts *graphdriver.CreateOpts) (retErr
 		return err
 	}
 
-	lid := generateID(idLength)
+	lid := GenerateID(IDLength)
 	if err := os.Symlink(path.Join("..", id, "diff"), path.Join(d.home, linkDir, lid)); err != nil {
 		return err
 	}

diff --git a/daemon/graphdriver/overlay2/randomid.go b/daemon/graphdriver/overlay2/randomid.go
@@ -15,7 +15,7 @@ import (
 )
 
 // generateID creates a new random string identifier with the given length
-func generateID(l int) string {
+func GenerateID(l int) string {
 	const (
 		// ensures we backoff for less than 450ms total. Use the following to
 		// select new value, in units of 10ms: