X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=components%2F9990-misc-helpers.sh;h=943e73b3f8deca967d697c181d814cb78daa616d;hb=144c84752e5f2ecafe658cc67a6cd888f00b155e;hp=87c49309721ad79d14b2a4b1d05e334d64295b0e;hpb=f2dcec3f21086a557db86ae928295474be79d35b;p=live-boot-grml.git

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index 87c4930..943e73b 100755
--- a/components/9990-misc-helpers.sh
+++ b/components/9990-misc-helpers.sh
@@ -114,7 +114,7 @@ check_dev ()
 				ISO_DEVICE=$(dirname ${ISO_DEVICE})
 				[ -b "$ISO_DEVICE" ] && break
 				i=$(($i -1))
-		        done
+			done
 		fi
 
 		if [ "$ISO_DEVICE" = "/" ]
@@ -1074,18 +1074,18 @@ find_persistence_media ()
 			result=$(probe_for_file_name "${overlays}" ${dev})
 			if [ -n "${result}" ]
 			then
-			        local loopdevice
+				local loopdevice
 				loopdevice=${result##*=}
-			        if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && is_luks_partition ${loopdevice}
+				if is_in_comma_sep_list luks ${PERSISTENCE_ENCRYPTION} && is_luks_partition ${loopdevice}
 				then
-				        local luksfile
+					local luksfile
 					luksfile=""
 					if luksfile=$(open_luks_device "${loopdevice}")
 					then
-					        result=${result%%=*}
+						result=${result%%=*}
 						result="${result}=${luksfile}"
 					else
-					        losetup -d $loopdevice
+						losetup -d $loopdevice
 						result=""
 					fi
 				fi
@@ -1301,13 +1301,9 @@ do_union ()
 					unionmountopts="${unionmountopts}:${rofs}=${ro_opt}"
 				done
 			fi
-			mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
 			;;
 
 		overlay)
-			rw_opt="rw"
-			ro_opt="ro"
-
 			# 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 ${unionro} | grep -q " "
@@ -1317,10 +1313,17 @@ do_union ()
 			then
 				panic "overlay needs at least one lower filesystem (read-only branch)."
 			fi
-			unionmountopts="-o noatime,lowerdir=${unionro},upperdir=${unionrw}"
-			mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
+			# 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"
 			;;
 	esac
+
+	mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
 }
 
 get_custom_mounts ()