From a3a8c1b84606e178d3f46d96b28935d74680479d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?okhowang=28=E7=8E=8B=E6=B2=9B=E6=96=87=29?=
 <okhowang@tencent.com>
Date: Tue, 27 Jan 2026 15:57:57 +0800
Subject: [PATCH] feat: Add overlay mount option parsing utilities
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: okhowang(王沛文) <okhowang@tencent.com>
---
 overlayUtils/overlayUtils.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/overlayUtils/overlayUtils.go b/overlayUtils/overlayUtils.go
index 6764171..f8c2d59 100644
--- a/overlayUtils/overlayUtils.go
+++ b/overlayUtils/overlayUtils.go
@@ -117,3 +117,23 @@ func GetUpperLayer(mntOpts *MountOpts) string {
 	}
 	return ""
 }
+
+func GetWorkLayer(mntOpts *MountOpts) string {
+	opts := strings.Split(mntOpts.Opts, ",")
+	for _, opt := range opts {
+		if strings.HasPrefix(opt, "workdir=") {
+			return strings.TrimPrefix(opt, "workdir=")
+		}
+	}
+	return ""
+}
+
+func GetVolatile(mntOpts *MountOpts) bool {
+	opts := strings.Split(mntOpts.Opts, ",")
+	for _, opt := range opts {
+		if opt == "volatile" {
+			return true
+		}
+	}
+	return false
+}