Cleaning up comment to keep only the part that's relevant here.

[live-boot-grml.git] / components / 9990-misc-helpers.sh

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index 87c4930..e1f2824 100755 (executable)
--- a/components/9990-misc-helpers.sh
+++ b/components/9990-misc-helpers.sh
@@ -1318,6 +1318,13 @@ do_union ()
                                panic "overlay needs at least one lower filesystem (read-only branch)."
                        fi
                        unionmountopts="-o noatime,lowerdir=${unionro},upperdir=${unionrw}"
+                       # overlayfs requires:
+                       # + a workdir to become mounted
+                       # + workdir and upperdir to reside under the same mount
+                       # + workdir and upperdir to be in separate directories
+                       mkdir ${unionrw}/rw
+                       mkdir ${unionrw}/work
+                       unionmountopts="-o noatime,lowerdir=${unionro},upperdir=${unionrw}/rw,workdir=${unionrw}/work"
                        mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
                        ;;
        esac