+ image_directory="${1}"
+ rootmnt="${2}"
+ addimage_directory="${3}"
+
+ case ${UNIONTYPE} in
+ aufs|unionfs)
+ modprobe -q -b ${UNIONTYPE}
+
+ if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$" && [ -x /bin/unionfs-fuse ]
+ then
+ echo "${UNIONTYPE} not available, falling back to unionfs-fuse."
+ echo "This might be really slow."
+
+ UNIONTYPE="unionfs-fuse"
+ fi
+ ;;
+ esac
+
+ if [ "${UNIONTYPE}" = unionfs-fuse ]
+ then
+ modprobe fuse
+ fi
+
+ # run-init can't deal with images in a subdir, but we're going to
+ # move all of these away before it runs anyway. No, we're not,
+ # put them in / since move-mounting them into / breaks mono and
+ # some other apps.
+
+ croot="/"
+
+ # Let's just mount the read-only file systems first
+ rofslist=""
+
+ if [ "${UNIONTYPE}" = "aufs" ]
+ then
+ roopt="rr"
+ noxino_opt="noxino,"
+ elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
+ then
+ roopt="RO"
+ else
+ roopt="ro"
+ fi
+
+ if [ -z "${PLAIN_ROOT}" ]
+ then
+ # Read image names from ${MODULE}.module if it exists
+ if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
+ then
+ for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
+ do
+ image_string="${image_string} ${image_directory}/${IMAGE}"
+ done
+ elif [ -e "${image_directory}/${MODULE}.module" ]
+ then
+ for IMAGE in $(cat ${image_directory}/${MODULE}.module)
+ do
+ image_string="${image_string} ${image_directory}/${IMAGE}"
+ done
+ else
+ # ${MODULE}.module does not exist, create a list of images
+ for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
+ do
+ for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
+ do
+ if [ -e "${IMAGE}" ]
+ then
+ image_string="${image_string} ${IMAGE}"
+ fi
+ done
+ done
+
+ if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
+ then
+ for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
+ do
+ for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
+ do
+ if [ -e "${IMAGE}" ]
+ then
+ image_string="${image_string} ${IMAGE}"
+ fi
+ done
+ done
+ fi
+
+ # Now sort the list
+ image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
+ fi
+
+ [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
+
+ mkdir -p "${croot}"
+
+ for image in ${image_string}
+ do
+ imagename=$(basename "${image}")
+
+ export image devname
+ maybe_break live-realpremount
+ log_begin_msg "Running /scripts/live-realpremount"
+ run_scripts /scripts/live-realpremount
+ log_end_msg
+
+ if [ -d "${image}" ]
+ then
+ # it is a plain directory: do nothing
+ rofslist="${image} ${rofslist}"
+ elif [ -f "${image}" ]
+ then
+ if losetup --help 2>&1 | grep -q -- "-r\b"
+ then
+ backdev=$(get_backing_device "${image}" "-r")
+ else
+ backdev=$(get_backing_device "${image}")
+ fi
+ fstype=$(get_fstype "${backdev}")
+
+ if [ "${fstype}" = "unknown" ]
+ then
+ panic "Unknown file system type on ${backdev} (${image})"
+ fi
+
+ if [ -z "${fstype}" ]
+ then
+ fstype="${imagename##*.}"
+ log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
+ fi
+
+ if [ "${UNIONTYPE}" != "unionmount" ]
+ then
+ mpoint="${croot}/${imagename}"
+ rofslist="${mpoint} ${rofslist}"
+ else
+ mpoint="${rootmnt}"
+ rofslist="${rootmnt} ${rofslist}"
+ fi
+ mkdir -p "${mpoint}"
+ log_begin_msg "Mounting \"${image}\" on \"${mpoint}\" via \"${backdev}\""
+ mount -t "${fstype}" -o ro,noatime "${backdev}" "${mpoint}" || panic "Can not mount ${backdev} (${image}) on ${mpoint}"
+ log_end_msg
+ fi
+ done
+ else
+ # we have a plain root system
+ mkdir -p "${croot}/filesystem"
+ log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
+ mount -t $(get_fstype "${image_directory}") -o ro,noatime "${image_directory}" "${croot}/filesystem" || \
+ panic "Can not mount ${image_directory} on ${croot}/filesystem" && \
+ rofslist="${croot}/filesystem ${rofslist}"
+ # probably broken:
+ mount -o bind ${croot}/filesystem $mountpoint
+ log_end_msg
+ fi
+
+ mkdir -p /cow
+
+ # Looking for "${root_persistence}" device or file
+ if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
+ then
+ if [ -z "${QUICKUSBMODULES}" ]
+ then
+ # Load USB modules
+ num_block=$(ls -l /sys/block | wc -l)
+ for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
+ do
+ modprobe -q -b ${module}
+ done
+
+ udevadm trigger
+ udevadm settle
+
+ # For some reason, udevsettle does not block in this scenario,
+ # so we sleep for a little while.
+ #
+ # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
+ for timeout in 5 4 3 2 1
+ do
+ sleep 1
+
+ if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
+ then
+ break
+ fi
+ done
+ fi
+
+ # search for label and files (this could be hugely optimized)
+ cowprobe=$(find_cow_device "${root_persistence}")
+ if [ -b "${cowprobe}" ]
+ then
+ # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
+ # makes sense to have both persistence for /cow and /home mounted, maybe also with
+ # snapshots to be sure to really store some e.g key config files,
+ # but not on the same media
+ blacklistdev="${cowprobe}"
+ PERSISTENCE_IS_ON="1"
+ export PERSISTENCE_IS_ON
+ fi
+ # homecow just mount something on /home, this should be generalized some way
+ homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
+ if [ -b "${homecow}" ]
+ then
+ PERSISTENCE_IS_ON="1"
+ export PERSISTENCE_IS_ON
+ fi
+ root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
+ # This second type should be removed when snapshot will get smarter,
+ # hence when "/etc/live-snapshot*list" will be supported also by
+ # ext2|ext3|ext4|jffs2 snapshot types.
+ home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
+
+ if [ -b "${cowprobe}" ]
+ then
+ cowdevice=${cowprobe}
+ cow_fstype=$(get_fstype "${cowprobe}")
+ cow_mountopt="rw,noatime"
+
+ if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
+ then
+ fsck -y ${cowdevice}
+ fi
+ else
+ log_warning_msg "Unable to find the persistent medium"
+ cowdevice="tmpfs"
+ cow_fstype="tmpfs"
+ cow_mountopt="rw,noatime,mode=755"
+ fi
+ elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
+ then
+ # check if there are any nfs options
+ if echo ${NFS_COW}|grep -q ','
+ then
+ nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
+ nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
+ else
+ nfs_cow_opts="-o nolock"
+ nfs_cow=${NFS_COW}
+ fi
+ mac="$(get_mac)"
+ if [ -n "${mac}" ]
+ then
+ cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
+ cow_fstype="nfs"
+ else
+ panic "unable to determine mac address"
+ fi
+ else
+ cowdevice="tmpfs"
+ cow_fstype="tmpfs"
+ cow_mountopt="rw,noatime,mode=755"
+ fi
+
+ if [ "${UNIONTYPE}" != "unionmount" ]
+ then
+
+ if [ "${cow_fstype}" = "nfs" ]
+ then
+ log_begin_msg \
+ "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
+ nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
+ panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
+ else
+ mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
+ panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
+ fi
+ fi
+
+ rofscount=$(echo ${rofslist} |wc -w)
+
+ if [ ${rofscount} -ne 1 ]
+ then
+ panic "only one RO file system supported with exposedroot: ${rofslist}"
+ fi
+ rofs=${rofslist%% }
+
+ if [ -n "${EXPOSED_ROOT}" ]
+ then
+ mount --bind ${rofs} ${rootmnt} || \
+ panic "bind mount of ${rofs} failed"
+
+ if [ -z "${SKIP_UNION_MOUNTS}" ]
+ then
+ cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
+ else
+ cow_dirs=''
+ fi
+ else
+ cow_dirs="/"
+ fi
+
+ if [ "${cow_fstype}" != "tmpfs" ] && [ "${cow_dirs}" != "/" ] && [ "${UNIONTYPE}" = "unionmount" ]
+ then
+ true # FIXME: Maybe it does, I don't really know.
+ #panic "unionmount does not support subunions (${cow_dirs})."
+ fi
+
+ unionmountopts=""
+ unionmountpoint=""
+
+ for dir in ${cow_dirs}; do
+ mkdir -p /cow${dir}
+
+ unionmountpoint="${rootmnt}${dir}"
+ unionrw="/cow${dir}"
+ unionro="${rofs}${dir}"
+ # We don't handle spaces and other junk gracefully here, hopefully not needed.
+ case "${UNIONTYPE}" in
+ unionfs-fuse)
+ unionmountopts="-o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid"
+ unionmountopts="${unionmountopts} ${unionrw}=RW:${unionro}=RO"
+ ( sysctl -w fs.file-max=391524 ; ulimit -HSn 16384
+ unionfs-fuse ${unionmountopts} "${unionmountpoint}" ) && \
+ ( mkdir -p /dev/.initramfs/varrun
+ pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true )
+ ;;
+
+ unionmount)
+ unionmountopts="-t ${cow_fstype} -o noatime,union,${cow_mountopt} ${cowdevice}"
+ mount_full $unionmountopts "${unionmountpoint}"
+ ;;
+
+
+ *)
+ unionmountopts="-o noatime,${noxino_opt}dirs=${unionrw}=rw:${unionro}=${roopt}"
+ mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
+ ;;
+ esac || \
+ panic "mount ${UNIONTYPE} on ${unionmountpoint} failed with option ${unionmountopts}"
+ done
+
+ # Correct the permissions of /:
+ chmod 0755 "${rootmnt}"
+
+ # tmpfs file systems
+ touch /etc/fstab
+ mkdir -p "${rootmnt}/live"
+ mount -t tmpfs tmpfs ${rootmnt}/live
+
+ # Adding other custom mounts
+ if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
+ then
+ # directly mount /home
+ # FIXME: add a custom mounts configurable system
+
+ if [ -b "${homecow}" ]
+ then
+ mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
+ export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
+ else
+ log_warning_msg "Unable to find the persistent home medium"
+ fi
+
+ # Look for other snapshots to copy in
+ try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
+ # This second type should be removed when snapshot grow smarter
+ try_snap "${home_snapdata}" "${rootmnt}" "HOME" "/home"
+ fi
+
+ if [ -n "${SHOWMOUNTS}" ]
+ then
+ for d in ${rofslist}
+ do
+ mkdir -p "${rootmnt}/live/${d##*/}"
+
+ case d in
+ *.dir)
+ # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
+ ;;
+
+ *)
+ case "${UNIONTYPE}" in
+ unionfs-fuse)
+ mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
+ ;;
+
+ *)
+ mount -o move "${d}" "${rootmnt}/live/${d##*/}"
+ ;;
+ esac
+ ;;
+ esac
+ done
+ fi
+
+ # shows cow fs on /cow for use by live-snapshot
+ mkdir -p "${rootmnt}/live/cow"
+ mount -o move /cow "${rootmnt}/live/cow" >/dev/null 2>&1 || mount -o bind /cow "${rootmnt}/live/cow" || log_warning_msg "Unable to move or bind /cow to ${rootmnt}/live/cow"