Dropping unionfs-fuse support:

  * unionfs-fuse itself has been always very buggy for us.
  * unionfs-fuse code in live-boot as been experimental at best.
  * the FUSE implementation is horribly slow due to the nature of
    FUSE (~10min to boot a live system with unionfs-fuse compared
    to <<1min with aufs).
  * and last but not least, there's overlay in kernel mainline now.

backend/initramfs-tools/live.hook

@@ -110,12 +110,6 @@ manual_add_modules aufs
 manual_add_modules overlay
 manual_add_modules unionfs
 
-# Filesystem: unionfs-fuse
-if [ -x /usr/bin/unionfs-fuse ]
-then
-	copy_exec /usr/bin/unionfs-fuse /bin
-fi
-
 # Filesystem: vfat
 manual_add_modules nls_cp437
 manual_add_modules nls_iso8859-1

components/9990-main.sh

@@ -148,15 +148,6 @@ Live ()
 
 	log_end_msg
 
-	# unionfs-fuse needs /dev to be bind-mounted for the duration of
-	# live-bottom; udev's init script will take care of things after that
-	case "${UNIONTYPE}" in
-		unionfs-fuse)
-			mount -n -o bind /dev "${rootmnt}/dev"
-			;;
-	esac
-
-
 	# aufs2 in kernel versions around 2.6.33 has a regression:
 	# directories can't be accessed when read for the first the time,
 	# causing a failure for example when accessing /var/lib/fai
@@ -201,12 +192,6 @@ Live ()
 
 	Swap
 
-	case "${UNIONFS}" in
-		unionfs-fuse)
-			umount "${rootmnt}/dev"
-			;;
-	esac
-
 	exec 1>&6 6>&-
 	exec 2>&7 7>&-
 	kill ${tailpid}

components/9990-misc-helpers.sh

@@ -1294,34 +1294,13 @@ do_union ()
 			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}"
-			if [ -n "${unionro}" ]
-			then
-				for rofs in ${unionro}
-				do
-					unionmountopts="${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?

components/9990-overlay.sh

@@ -10,21 +10,12 @@ setup_unionfs ()
 
 	case ${UNIONTYPE} in
 		aufs|unionfs|overlay)
-			modprobe -q -b ${UNIONTYPE}
-
-			if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$" && [ -x /bin/unionfs-fuse ]
+			if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$"
 			then
-				echo "${UNIONTYPE} not available, falling back to unionfs-fuse."
-				echo "This might be really slow."
-
-				UNIONTYPE="unionfs-fuse"
+				panic "${UNIONTYPE} not available."
 			fi
-			;;
-	esac
 
-	case "${UNIONTYPE}" in
-		unionfs-fuse)
-			modprobe fuse
+			modprobe -q -b ${UNIONTYPE}
 			;;
 	esac
 
@@ -358,15 +349,7 @@ setup_unionfs ()
 				# do nothing # mount -o bind "${d}" "${live_rootfs}"
 				;;
 			*)
-				case "${UNIONTYPE}" in
-					unionfs-fuse)
-						mount -o bind "${d}" "${live_rootfs}"
-						;;
-
-					*)
-						mount -o move "${d}" "${live_rootfs}"
-						;;
-				esac
+				mount -o move "${d}" "${live_rootfs}"
 				;;
 		esac
 	done

debian/control

@@ -23,7 +23,6 @@ Suggests:
  curlftpfs,
  cryptsetup,
  httpfs2,
- unionfs-fuse,
  wget,
 Description: Live System Boot Components
  The Live Systems project maintains the components to build Debian based Live

debian/live-boot.bug-script

@@ -7,7 +7,7 @@ dpkg -l busybox busybox-initramfs initramfs-tools udev
 dpkg -l rsync uuid-runtime
 
 # Checking suggests
-dpkg -l curlftpfs cryptsetup httpfs2 unionfs-fuse wget
+dpkg -l curlftpfs cryptsetup httpfs2 wget
 
 # Checking other packages
 dpkg -l plymouth