X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=components%2F9990-misc-helpers.sh;h=39e609d3a2619ef15f15116d524afe6c984b2b22;hb=f5716f9a79564e44e38f5d4164a4dc1d77cb8c3a;hp=70f907a86b647c647b0591f511fe85aa525957e2;hpb=44e7b72fa71425b02ec770b1f3429b27a5cf6c51;p=live-boot-grml.git

diff --git a/components/9990-misc-helpers.sh b/components/9990-misc-helpers.sh
index 70f907a..39e609d 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" = "/" ]
@@ -420,6 +420,12 @@ is_supported_fs ()
 		return 1
 	fi
 
+	# get_fstype might report "unknown" or "swap", ignore it as no such kernel module exists
+	if [ "${fstype}" = "unknown" ] || [ "${fstype}" = "swap" ]
+	then
+		return 1
+	fi
+
 	# Try to look if it is already supported by the kernel
 	if grep -q ${fstype} /proc/filesystems
 	then
@@ -1074,18 +1080,18 @@ find_persistence_media ()
 			result=$(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
@@ -1292,23 +1298,8 @@ do_union ()
 			rw_opt="rw"
 			ro_opt="rr+wh"
 			noxino_opt="noxino"
-			;;
-
-		unionfs-fuse)
-			rw_opt="RW"
-			ro_opt="RO"
-			;;
 
-		*)
-			rw_opt="rw"
-			ro_opt="ro"
-			;;
-	esac
-
-	case "${UNIONTYPE}" in
-		unionfs-fuse)
-			unionmountopts="-o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid"
-			unionmountopts="${unionmountopts} ${unionrw}=${rw_opt}"
+			unionmountopts="-o noatime,${noxino_opt},dirs=${unionrw}=${rw_opt}"
 			if [ -n "${unionro}" ]
 			then
 				for rofs in ${unionro}
@@ -1316,38 +1307,28 @@ do_union ()
 					unionmountopts="${unionmountopts}:${rofs}=${ro_opt}"
 				done
 			fi
-			( sysctl -w fs.file-max=391524 ; ulimit -HSn 16384
-			unionfs-fuse ${unionmountopts} "${unionmountpoint}" ) && \
-			( mkdir -p /run/sendsigs.omit.d
-			pidof unionfs-fuse >> /run/sendsigs.omit.d/unionfs-fuse || true )
 			;;
 
 		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 " "
-			then
-				panic "Multiple lower filesystems are currently not supported with overlay (unionro = ${unionro})."
-			elif [ -z "${unionro}"	]
+			# XXX: can unionro be optional? i.e. can overlay skip lowerdir?
+			if [ -z "${unionro}" ]
 			then
 				panic "overlay needs at least one lower filesystem (read-only branch)."
 			fi
-			unionmountopts="-o noatime,lowerdir=${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
-			mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
+			# Multiple lower layers can now be given using the the colon (":") as a
+			# separator character between the directory names.
+			unionro="$(echo ${unionro} | sed -e 's| |:|g')"
+			# overlayfs requires:
+			# + a workdir to become mounted
+			# + workdir and upperdir to reside under the same mount
+			# + workdir and upperdir to be in separate directories
+			mkdir "${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 ()