ext3 to ext4

gistfile1.diff

@@ -66 +66 @@ cfg.MultiStrOpt() {
cfg.MultiStrOpt('virt_mkfs',
                default=[
-                  'default=mkfs.ext3 -L %(fs_label)s -F %(target)s',
+                  'default=mkfs.ext4 -L %(fs_label)s -F %(target)s',
                  'linux=mkfs.ext3 -L %(fs_label)s -F %(target)s',
                  'windows=mkfs.ntfs'
                  ' --force --fast --label %(fs_label)s %(target)s',
                  # NOTE(yamahata): vfat case
                  #'windows=mkfs.vfat -n %(fs_label)s %(target)s',
                  ],
                help='mkfs commands for ephemeral device. '
                     'The format is <os_type>=<mkfs command>'),
]