From: Amir Goldstein <amir73il@xxxxxxxxx>
Allow passing empty upperdir to _overlay_mount_dirs().
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
common/overlay | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/common/overlay b/common/overlay
index 20cafeb1..452b3b09 100644
--- a/common/overlay
+++ b/common/overlay
@@ -17,15 +17,19 @@ if [ -n "$OVL_BASE_FSTYP" ];then
fi
# helper function to do the actual overlayfs mount operation
+# accepts "-" as upperdir for non-upper overlayfs
_overlay_mount_dirs()
{
local lowerdir=$1
local upperdir=$2
local workdir=$3
shift 3
+ local diropts="-olowerdir=$lowerdir"
- $MOUNT_PROG -t overlay -o lowerdir=$lowerdir -o upperdir=$upperdir \
- -o workdir=$workdir `_common_dev_mount_options $*`
+ [ -n "$upperdir" ] && [ "$upperdir" != "-" ] && \
+ diropts+=",upperdir=$upperdir,workdir=$workdir"
+
+ $MOUNT_PROG -t overlay $diropts `_common_dev_mount_options $*`
}
# Mount with same options/mnt/dev of scratch mount, but optionally
--
2.40.1
