From adfbda464b3db74e12feed565e3d914ca93d623f Mon Sep 17 00:00:00 2001
From: Anastassios Nanos <ananos@nubificus.co.uk>
Date: Thu, 8 Sep 2022 14:38:16 +0000
Subject: [PATCH] Add ext2 fs support to devmapper snapshotter

Signed-off-by: Anastassios Nanos <ananos@nubificus.co.uk>
---
 snapshots/devmapper/config.go      | 2 +-
 snapshots/devmapper/snapshotter.go | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/snapshots/devmapper/config.go b/snapshots/devmapper/config.go
index 335832985..7713f1561 100644
--- a/snapshots/devmapper/config.go
+++ b/snapshots/devmapper/config.go
@@ -117,7 +117,7 @@ func (c *Config) Validate() error {
 
 	if c.FileSystemType != "" {
 		switch c.FileSystemType {
-		case fsTypeExt4, fsTypeXFS:
+		case fsTypeExt4, fsTypeXFS, fsTypeExt2:
 		default:
 			result = multierror.Append(result, fmt.Errorf("unsupported Filesystem Type: %q", c.FileSystemType))
 		}
diff --git a/snapshots/devmapper/snapshotter.go b/snapshots/devmapper/snapshotter.go
index 1e2977966..601b95212 100644
--- a/snapshots/devmapper/snapshotter.go
+++ b/snapshots/devmapper/snapshotter.go
@@ -44,6 +44,7 @@ type fsType string
 const (
 	metadataFileName               = "metadata.db"
 	fsTypeExt4              fsType = "ext4"
+	fsTypeExt2              fsType = "ext2"
 	fsTypeXFS               fsType = "xfs"
 	devmapperSnapshotFsType        = "containerd.io/snapshot/devmapper/fstype"
 )
@@ -468,6 +469,13 @@ func mkfs(ctx context.Context, fs fsType, fsOptions string, path string) error {
 			fsOptions,
 			path,
 		}
+	case fsTypeExt2:
+		mkfsCommand = "mkfs.ext2"
+		args = []string{
+			"-E",
+			fsOptions,
+			path,
+		}
 	case fsTypeXFS:
 		mkfsCommand = "mkfs.xfs"
 		args = []string{