X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=components%2F9990-misc-helpers.sh;h=5fd8e3e72ddada5934ad1c4952990b36e4bf7903;hb=206a9bc0c758ac5f2fb55b52478de16c73bed680;hp=fcd2b07c365e8d1f026f92833413ec136ca23ece;hpb=ec9bd07c900e13d606445518a87e0326902d5815;p=live-boot-grml.git

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index fcd2b07..5fd8e3e 100755
--- a/components/9990-misc-helpers.sh
+++ b/components/9990-misc-helpers.sh
@@ -1292,16 +1292,22 @@ do_union ()
 			rw_opt="rw"
 			ro_opt="rr+wh"
 			noxino_opt="noxino"
+
+			unionmountopts="-o noatime,${noxino_opt},dirs=${unionrw}=${rw_opt}"
+			if [ -n "${unionro}" ]
+			then
+				for rofs in ${unionro}
+				do
+					unionmountopts="${unionmountopts}:${rofs}=${ro_opt}"
+				done
+			fi
+			mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
 			;;
 
-		*)
+		overlay)
 			rw_opt="rw"
 			ro_opt="ro"
-			;;
-	esac
 
-	case "${UNIONTYPE}" in
-		overlay)
 			# XXX: can multiple unionro be used? (overlay only handles two dirs, but perhaps they can be chained?)
 			# XXX: and can unionro be optional? i.e. can overlay skip lowerdir?
 			if echo ${unionro} | grep -q " "
@@ -1311,19 +1317,13 @@ do_union ()
 			then
 				panic "overlay needs at least one lower filesystem (read-only branch)."
 			fi
-			unionmountopts="-o noatime,lowerdir=${unionro},upperdir=${unionrw}"
-			mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
-			;;
-
-		*)
-			unionmountopts="-o noatime,${noxino_opt},dirs=${unionrw}=${rw_opt}"
-			if [ -n "${unionro}" ]
-			then
-				for rofs in ${unionro}
-				do
-					unionmountopts="${unionmountopts}:${rofs}=${ro_opt}"
-				done
-			fi
+			# 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