From 9e429a3e1e1065f13fd0fa8e578035ab5e1e5a69 Mon Sep 17 00:00:00 2001
From: Jan Safranek <jsafrane@redhat.com>
Date: Fri, 30 Jul 2021 14:27:03 +0200
Subject: [PATCH] fix: Disable uuid checks on XFS

Add 'nouuid' mount option to all XFS mounts to be able to mount a volume
and its restored snapshot on the same node. Without the option, such a
mount fails, because XFS detects that two different volumes with the same
filesystem UUID are being mounted.
---
 pkg/azuredisk/nodeserver.go | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/pkg/azuredisk/nodeserver.go b/pkg/azuredisk/nodeserver.go
index a2c0b3c69e..06da76b39f 100644
--- a/pkg/azuredisk/nodeserver.go
+++ b/pkg/azuredisk/nodeserver.go
@@ -131,7 +131,7 @@ func (d *Driver) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRe
 		if mnt.FsType != "" {
 			fstype = mnt.FsType
 		}
-		options = append(options, mnt.MountFlags...)
+		options = append(options, collectMountOptions(fstype, mnt.MountFlags)...)
 	}
 
 	volContextFSType := getFStype(req.GetVolumeContext())
@@ -600,3 +600,15 @@ func (d *Driver) ensureBlockTargetFile(target string) error {
 
 	return nil
 }
+
+func collectMountOptions(fsType string, mntFlags []string) []string {
+	var options []string
+	options = append(options, mntFlags...)
+
+	// By default, xfs does not allow mounting of two volumes with the same filesystem uuid.
+	// Force ignore this uuid to be able to mount volume + its clone / restored snapshot on the same node.
+	if fsType == "xfs" {
+		options = append(options, "nouuid")
+	}
+	return options
+}