9 addimage_directory="${3}"
12 aufs|unionfs|overlayfs)
13 modprobe -q -b ${UNIONTYPE}
15 if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$" && [ -x /bin/unionfs-fuse ]
17 echo "${UNIONTYPE} not available, falling back to unionfs-fuse."
18 echo "This might be really slow."
20 UNIONTYPE="unionfs-fuse"
25 case "${UNIONTYPE}" in
31 # run-init can't deal with images in a subdir, but we're going to
32 # move all of these away before it runs anyway. No, we're not,
33 # put them in / since move-mounting them into / breaks mono and
38 # Let's just mount the read-only file systems first
41 if [ -z "${PLAIN_ROOT}" ]
43 # Read image names from ${MODULE}.module if it exists
44 if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
46 for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
48 image_string="${image_string} ${image_directory}/${IMAGE}"
50 elif [ -e "${image_directory}/${MODULE}.module" ]
52 for IMAGE in $(cat ${image_directory}/${MODULE}.module)
54 image_string="${image_string} ${image_directory}/${IMAGE}"
57 # ${MODULE}.module does not exist, create a list of images
58 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
60 for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
64 image_string="${image_string} ${IMAGE}"
69 if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
71 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
73 for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
77 image_string="${image_string} ${IMAGE}"
84 image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
87 [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
91 for image in ${image_string}
93 imagename=$(basename "${image}")
96 maybe_break live-realpremount
97 log_begin_msg "Running /scripts/live-realpremount"
98 run_scripts /scripts/live-realpremount
103 # it is a plain directory: do nothing
104 rofslist="${image} ${rofslist}"
105 elif [ -f "${image}" ]
107 if losetup --help 2>&1 | grep -q -- "-r\b"
109 backdev=$(get_backing_device "${image}" "-r")
111 backdev=$(get_backing_device "${image}")
113 fstype=$(get_fstype "${backdev}")
117 panic "Unknown file system type on ${backdev} (${image})"
121 fstype="${imagename##*.}"
122 log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
126 case "${UNIONTYPE}" in
129 rofslist="${rootmnt} ${rofslist}"
133 mpoint="${croot}/${imagename}"
134 rofslist="${mpoint} ${rofslist}"
139 log_begin_msg "Mounting \"${image}\" on \"${mpoint}\" via \"${backdev}\""
140 mount -t "${fstype}" -o ro,noatime "${backdev}" "${mpoint}" || panic "Can not mount ${backdev} (${image}) on ${mpoint}"
145 # we have a plain root system
146 mkdir -p "${croot}/filesystem"
147 log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
148 mount -t $(get_fstype "${image_directory}") -o ro,noatime "${image_directory}" "${croot}/filesystem" || \
149 panic "Can not mount ${image_directory} on ${croot}/filesystem" && \
150 rofslist="${croot}/filesystem ${rofslist}"
152 mount -o bind ${croot}/filesystem $mountpoint
159 mount -t tmpfs tmpfs /live
160 mkdir -p /live/overlay
162 # Looking for persistence devices or files
163 if [ -n "${PERSISTENCE}" ] && [ -z "${NOPERSISTENCE}" ]
166 if [ -z "${QUICKUSBMODULES}" ]
169 num_block=$(ls -l /sys/block | wc -l)
170 for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
172 modprobe -q -b ${module}
178 # For some reason, udevsettle does not block in this scenario,
179 # so we sleep for a little while.
181 # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
182 for timeout in 5 4 3 2 1
186 if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
193 case "${PERSISTENCE_MEDIA}" in
195 whitelistdev="$(removable_dev)"
199 whitelistdev="$(removable_usb_dev)"
207 if is_in_comma_sep_list overlay ${PERSISTENCE_METHOD}
209 overlays="${old_root_overlay_label} ${old_home_overlay_label} ${custom_overlay_label}"
212 local overlay_devices=""
213 for media in $(find_persistence_media "${overlays}" "${whitelistdev}")
215 media="$(echo ${media} | tr ":" " ")"
218 ${old_root_overlay_label}=*)
220 fix_backwards_compatibility ${device} / union
221 overlay_devices="${overlay_devices} ${device}"
224 ${old_home_overlay_label}=*)
226 fix_backwards_compatibility ${device} /home bind
227 overlay_devices="${overlay_devices} ${device}"
230 ${custom_overlay_label}=*)
232 overlay_devices="${overlay_devices} ${device}"
236 elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENCE}" ]
238 # check if there are any nfs options
239 if echo ${NFS_COW} | grep -q ','
241 nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
242 nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
244 nfs_cow_opts="-o nolock"
248 if [ -n "${PERSISTENCE_READONLY}" ]
250 nfs_cow_opts="${nfs_cow_opts},nocto,ro"
256 cowdevice=$(echo ${nfs_cow} | sed "s/client_mac_address/${mac}/")
259 panic "unable to determine mac address"
263 if [ -z "${cowdevice}" ]
267 cow_mountopt="rw,noatime,mode=755"
270 if [ "${UNIONTYPE}" != "unionmount" ]
272 if [ -n "${PERSISTENCE_READONLY}" ] && [ "${cowdevice}" != "tmpfs" ]
274 mount -t tmpfs -o rw,noatime,mode=755 tmpfs "/live/overlay"
275 root_backing="/live/persistence/$(basename ${cowdevice})-root"
276 mkdir -p ${root_backing}
278 root_backing="/live/overlay"
281 if [ "${cow_fstype}" = "nfs" ]
284 "Trying nfsmount ${nfs_cow_opts} ${cowdevice} ${root_backing}"
285 nfsmount ${nfs_cow_opts} ${cowdevice} ${root_backing} || \
286 panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on ${root_backing}"
288 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} ${root_backing} || \
289 panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on ${root_backing}"
293 rofscount=$(echo ${rofslist} |wc -w)
297 if [ -n "${EXPOSED_ROOT}" ]
299 if [ ${rofscount} -ne 1 ]
301 panic "only one RO file system supported with exposedroot: ${rofslist}"
304 mount --bind ${rofs} ${rootmnt} || \
305 panic "bind mount of ${rofs} failed"
307 if [ -z "${SKIP_UNION_MOUNTS}" ]
309 cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
317 if [ "${cow_fstype}" != "tmpfs" ] && [ "${cow_dirs}" != "/" ] && [ "${UNIONTYPE}" = "unionmount" ]
319 true # FIXME: Maybe it does, I don't really know.
320 #panic "unionmount does not support subunions (${cow_dirs})."
323 for dir in ${cow_dirs}; do
324 unionmountpoint="${rootmnt}${dir}"
325 mkdir -p ${unionmountpoint}
326 if [ "${UNIONTYPE}" = "unionmount" ]
328 # FIXME: handle PERSISTENCE_READONLY
329 unionmountopts="-t ${cow_fstype} -o noatime,union,${cow_mountopt} ${cowdevice}"
330 mount_full $unionmountopts "${unionmountpoint}"
332 cow_dir="/live/overlay${dir}"
333 rofs_dir="${rofs}${dir}"
335 if [ -n "${PERSISTENCE_READONLY}" ] && [ "${cowdevice}" != "tmpfs" ]
337 do_union ${unionmountpoint} ${cow_dir} ${root_backing} ${rofs_dir}
339 do_union ${unionmountpoint} ${cow_dir} ${rofs_dir}
341 fi || panic "mount ${UNIONTYPE} on ${unionmountpoint} failed with option ${unionmountopts}"
344 # Correct the permissions of /:
345 chmod 0755 "${rootmnt}"
348 # SHOWMOUNTS is necessary for custom mounts with the union option
349 # Since we may want to do custom mounts in user-space it's best to always enable SHOWMOUNTS
350 if true #[ -n "${SHOWMOUNTS}" ] || ( [ -n "${PERSISTENCE}" ] && [ -z "${NOPERSISTENCE}" ] 1)
352 # XXX: is the for loop really necessary? rofslist can only contain one item (see above XXX about EXPOSEDROOT) and this is also assumed elsewhere above (see use of $rofs above).
355 live_rofs="/live/rofs/${d##*/}"
356 live_rofs_list="${live_rofs_list} ${live_rofs}"
357 mkdir -p "${live_rofs}"
360 # do nothing # mount -o bind "${d}" "${live_rofs}"
363 case "${UNIONTYPE}" in
365 mount -o bind "${d}" "${live_rofs}"
369 mount -o move "${d}" "${live_rofs}"
377 # Adding custom persistence
378 if [ -n "${PERSISTENCE}" ] && [ -z "${NOPERSISTENCE}" ]
380 local custom_mounts="/tmp/custom_mounts.list"
381 rm -rf ${custom_mounts} 2> /dev/null
383 # Gather information about custom mounts from devies detected as overlays
384 get_custom_mounts ${custom_mounts} ${overlay_devices}
386 [ -n "${DEBUG}" ] && cp ${custom_mounts} "/live/persistence"
388 # Now we do the actual mounting (and symlinking)
389 local used_overlays=""
390 used_overlays=$(activate_custom_mounts ${custom_mounts})
393 # Close unused overlays (e.g. due to missing $persistence_list)
394 for overlay in ${overlay_devices}
396 if echo ${used_overlays} | grep -qve "^\(.* \)\?${device}\( .*\)\?$"
398 close_persistence_media ${overlay}
403 mkdir -p "${rootmnt}/live"
404 mount -o move /live "${rootmnt}/live" >/dev/null 2>&1 || mount -o bind /live "${rootmnt}/live" || log_warning_msg "Unable to move or bind /live to ${rootmnt}/live"
406 # shows cow fs on /overlay (FIXME: do we still need/want this? probably yes)
407 mkdir -p "${rootmnt}/live/overlay"
408 mount -o move /live/overlay "${rootmnt}/live/overlay" >/dev/null 2>&1 || mount -o bind /overlay "${rootmnt}/live/overlay" || log_warning_msg "Unable to move or bind /overlay to ${rootmnt}/live/overlay"