meta-phosphor/recipes-phosphor/initrdscripts/phosphor-static-norootfs-init/50-mount-persistent

#!/bin/sh

PERSIST=/run/mnt-persist

if [ ! -d $PERSIST ]; then
    exit 0
fi

for m in var etc home/root; do
    if [ ! -d $PERSIST/$m-data ]; then
        mkdir -p $PERSIST/$m-data
    fi

    if [ ! -d $PERSIST/$m-work ]; then
        mkdir -p $PERSIST/$m-work
    fi

    mount overlay /$m -t overlay -o \
        lowerdir=/$m,upperdir=$PERSIST/$m-data,workdir=$PERSIST/$m-work
done