where_is_mounted ()
{
device=${1}
+ # return first found
+ grep -m1 "^${device} " /proc/mounts | cut -f2 -d ' '
+}
- if grep -q "^${device} " /proc/mounts
- then
- # return the first found
- grep -m1 "^${device} " /proc/mounts | cut -f2 -d ' '
- fi
+trim_path () {
+ # remove all unnecessary /:s in the path, including last one (except
+ # if path is just "/")
+ echo ${1} | sed 's|//\+|/|g' | sed 's|^\(.*[^/]\)/$|\1|'
+}
+
+what_is_mounted_on ()
+{
+ local dir="$(trim_path ${1})"
+ grep -m1 "^[^ ]\+ ${dir} " /proc/mounts | cut -d' ' -f1
}
lastline ()
fi
}
+mount_persistent_media ()
+{
+ local device=${1}
+ local backing=""
+
+ # We can't mount into ${rootmnt}/live before ${rootmnt} has been
+ # mounted since that would cover our mountpoint.
+ if [ -n "${rootmnt}" ] && [ -z "$(what_is_mounted_on ${rootmnt})" ]
+ then
+ backing="/$(basename ${device})-backing"
+ else
+ backing="${rootmnt}/live/persistent/$(basename ${device})"
+ fi
+
+ mkdir -p "${backing}"
+ local old_backing="$(where_is_mounted ${device})"
+ if [ -z "${old_backing}" ]
+ then
+ local fstype="$(get_fstype ${device})"
+ local mount_opts="rw,noatime"
+ if [ -n "${PERSISTENT_READONLY}" ]
+ then
+ mount_opts="ro,noatime"
+ fi
+ if mount -t "${fstype}" -o "${mount_opts}" "${device}" "${backing}" >/dev/null
+ then
+ echo ${backing}
+ return 0
+ else
+ log_warning_msg "Failed to mount persistent media ${device}"
+ return 1
+ fi
+ elif [ "${backing}" != "${old_backing}" ]
+ then
+ if mount --move ${old_backing} ${backing} >/dev/null
+ then
+ echo ${backing}
+ return 0
+ else
+ log_warning_msg "Failed to move persistent media ${device}"
+ return 1
+ fi
+ fi
+ return 0
+}
+
+close_persistent_media () {
+ local device=${1}
+ local backing="$(where_is_mounted ${device})"
+
+ if [ -d "${backing}" ]
+ then
+ umount "${backing}" >/dev/null 2>&1
+ rmdir "${backing}" >/dev/null 2>&1
+ fi
+
+ if is_active_luks_mapping ${device}
+ then
+ /sbin/cryptsetup luksClose ${device}
+ fi
+}
+
open_luks_device ()
{
dev="${1}"
opts="${opts} --readonly"
fi
+ if /sbin/cryptsetup status "${name}" >/dev/null 2>&1
+ then
+ re="^[[:space:]]*device:[[:space:]]*\([^[:space:]]*\)$"
+ opened_dev=$(cryptsetup status ${name} 2>/dev/null | grep "${re}" | sed "s|${re}|\1|")
+ if [ "${opened_dev}" = "${dev}" ]
+ then
+ luks_device="/dev/mapper/${name}"
+ echo ${luks_device}
+ return 0
+ else
+ log_warning_msg "Cannot open luks device ${dev} since ${opened_dev} already is opened with its name"
+ return 1
+ fi
+ fi
+
load_keymap
while true
done
}
-get_gpt_name () {
+get_gpt_name ()
+{
local dev="${1}"
/sbin/blkid -s PART_ENTRY_NAME -p -o value ${dev} 2>/dev/null
}
-is_gpt_device () {
+is_gpt_device ()
+{
local dev="${1}"
[ "$(/sbin/blkid -s PART_ENTRY_SCHEME -p -o value ${dev} 2>/dev/null)" = "gpt" ]
}
local snapshots="${2}"
local dev="${3}"
- if ! is_gpt_device ${dev} || \
- ( echo ${PERSISTENT_ENCRYPTION} | grep -qve "\<luks\>" && \
- /sbin/cryptsetup isLuks ${dev} > /dev/null 2>&1 )
+ local gpt_dev="${dev}"
+ if is_active_luks_mapping ${dev}
+ then
+ # if $dev is an opened luks device, we need to check
+ # GPT stuff on the backing device
+ gpt_dev=$(get_luks_backing_device "${dev}")
+ fi
+
+ if ! is_gpt_device ${gpt_dev}
then
return
fi
+
+ local gpt_name=$(get_gpt_name ${gpt_dev})
for label in ${overlays} ${snapshots}
do
- if [ "$(get_gpt_name ${dev})" = "${label}" ]
+ if [ "${gpt_name}" = "${label}" ]
then
echo "${label}=${dev}"
fi
done
}
-probe_for_fs_label () {
+probe_for_fs_label ()
+{
local overlays="${1}"
local snapshots="${2}"
local dev="${3}"
done
}
-probe_for_file_name () {
+probe_for_file_name ()
+{
local overlays="${1}"
local snapshots="${2}"
local dev="${3}"
- local devfstype="$(get_fstype ${dev})"
- local backing="${rootmnt}/live/persistent/$(basename ${dev})"
local ret=""
- if is_supported_fs ${devfstype} && mkdir -p "${backing}" && \
- try_mount "${dev}" "${backing}" "rw" "${devfstype}"
+ local backing="$(mount_persistent_media ${dev})"
+ if [ -z "${backing}" ]
then
- for label in ${overlays}
+ return
+ fi
+
+ for label in ${overlays}
+ do
+ path=${backing}/${PERSISTENT_PATH}${label}
+ if [ -f "${path}" ]
+ then
+ local loopdev=$(setup_loop "${path}" "loop" "/sys/block/loop*")
+ ret="${ret} ${label}=${loopdev}"
+ fi
+ done
+ for label in ${snapshots}
+ do
+ for ext in squashfs cpio.gz ext2 ext3 ext4 jffs2
do
- path=${backing}/${PERSISTENT_PATH}${label}
- if [ -f "${path}" ]
+ path="${PERSISTENT_PATH}${label}.${ext}"
+ if [ -f "${backing}/${path}" ]
then
- local loopdev=$(setup_loop "${path}" "loop" "/sys/block/loop*")
- ret="${ret} ${label}=${loopdev}"
+ ret="${ret} ${label}=${dev}:${backing}:${path}"
fi
done
- for label in ${snapshots}
- do
- for ext in squashfs cpio.gz ext2 ext3 ext4 jffs2
- do
- path="${PERSISTENT_PATH}${label}.${ext}"
- if [ -f "${backing}/${path}" ]
- then
- ret="${ret} ${label}=${dev}:${backing}:${path}"
- fi
- done
- done
+ done
- if [ -n "${ret}" ]
- then
- echo ${ret}
- else
- umount ${backing} > /dev/null 2>&1 || true
- fi
+ if [ -n "${ret}" ]
+ then
+ echo ${ret}
+ else
+ umount ${backing} > /dev/null 2>&1 || true
fi
}
local overlays="${1}"
local snapshots="${2}"
- local black_listed_devices="${3}"
- local white_listed_devices="${4}"
+ local white_listed_devices="${3}"
local ret=""
- for dev in $(storage_devices "${black_listed_devices}" "${white_listed_devices}")
+ for dev in $(storage_devices "" "${white_listed_devices}")
do
local result=""
- local real_dev=""
local luks_device=""
# Check if it's a luks device; we'll have to open the device
# in order to probe any filesystem it contains, like we do
- # below. do_custom_mounts() also depends on that any luks
+ # below. activate_custom_mounts() also depends on that any luks
# device already has been opened.
if echo ${PERSISTENT_ENCRYPTION} | grep -qe "\<luks\>" && \
- /sbin/cryptsetup isLuks ${dev} >/dev/null 2>&1
+ is_luks_partition ${dev}
then
if luks_device=$(open_luks_device "${dev}")
then
- real_dev="${dev}"
dev="${luks_device}"
else
# skip $dev since we failed/chose not to open it
# Probe for matching GPT partition names or filesystem labels
if echo ${PERSISTENT_STORAGE} | grep -qe "\<filesystem\>"
then
- local gpt_dev="${dev}"
- if [ -n "${luks_device}" ]
- then
- # When we probe GPT partitions we need to look
- # at the real device, not the virtual, opened
- # luks device
- gpt_dev="${real_dev}"
- fi
- result=$(probe_for_gpt_name "${overlays}" "${snapshots}" ${gpt_dev})
+ result=$(probe_for_gpt_name "${overlays}" "${snapshots}" ${dev})
if [ -n "${result}" ]
then
ret="${ret} ${result}"
# Close luks device if it isn't used
if [ -z "${result}" ] && [ -n "${luks_device}" ] && \
- /sbin/cryptsetup status "${luks_device}" 1> /dev/null 2>&1
+ is_active_luks_mapping "${luks_device}"
then
/sbin/cryptsetup luksClose "${luks_device}"
fi
echo ${mac}
}
-is_luks()
+is_luks_partition ()
{
- devname="${1}"
- if [ -x /sbin/cryptsetup ]
- then
- /sbin/cryptsetup isLuks "${devname}" 2>/dev/null || ret=${?}
- return ${ret}
- else
- return 1
- fi
+ device="${1}"
+ /sbin/cryptsetup isLuks "${device}" 1>/dev/null 2>&1
+}
+
+is_active_luks_mapping ()
+{
+ device="${1}"
+ /sbin/cryptsetup status "${device}" 1>/dev/null 2>&1
+}
+get_luks_backing_device () {
+ device=${1}
+ cryptsetup status ${device} 2> /dev/null | \
+ awk '{if ($1 == "device:") print $2}'
}
removable_dev ()
# This check can only trigger on the inital, non-recursive call since
# we create the destination before recursive calls
- if [ ! -d "${dest_dir}" ];
+ if [ ! -d "${dest_dir}" ]
then
log_warning_msg "Must link_files into a directory"
return
fi
- find "${src_dir}" -mindepth 1 -maxdepth 1 | while read x; do
- local src="${x}"
- local dest="${dest_dir}$(basename "${x}")"
- if [ -d "${src}" ];
+ find "${src_dir}" -mindepth 1 -maxdepth 1 | while read src; do
+ local dest="${dest_dir}$(basename "${src}")"
+ if [ -d "${src}" ]
then
- if [ -z "$(ls -A "${src}")" ];
+ if [ -z "$(ls -A "${src}")" ]
then
continue
fi
- if [ ! -d "${dest}" ];
+ if [ ! -d "${dest}" ]
then
mkdir -p "${dest}"
prev="$(dirname "${dest}")"
done
}
-do_union () {
+do_union ()
+{
local unionmountpoint="${1}" # directory where the union is mounted
local unionrw="${2}" # branch where the union changes are stored
local unionro1="${3}" # first underlying read-only branch (optional)
esac
}
-get_custom_mounts () {
+get_custom_mounts ()
+{
# Side-effect: leaves $devices with live.persist mounted in ${rootmnt}/live/persistent
# Side-effect: prints info to file $custom_mounts
- local devices="${1}"
- local custom_mounts="${2}" # print result to this file
- local rootmnt="${3}" # should be set empty post-live-boot
+ local custom_mounts=${1}
+ shift
+ local devices=${@}
- local bindings="/bindings.list"
- local links="/links.list"
+ local bindings="/tmp/bindings.list"
+ local links="/tmp/links.list"
rm -rf ${bindings} ${links} 2> /dev/null
- local persistent_backing="${rootmnt}/live/persistent"
for device in ${devices}
do
fi
local device_name="$(basename ${device})"
- local device_used=""
- # $device may already have been mounted by
- # probe_for_file_name() in find_persistent_media() ...
- local backing=$(where_is_mounted ${device})
+ local backing=$(mount_persistent_media ${device})
if [ -z "${backing}" ]
then
- # ... otherwise we mount it now
- backing="${persistent_backing}/${device_name}"
- mkdir -p "${backing}"
- local device_fstype="$(get_fstype ${device})"
- if [ -z "${PERSISTENT_READONLY}" ]
- then
- device_mount_opts="rw,noatime"
- else
- device_mount_opts="ro,noatime"
- fi
- if ! mount -t "${device_fstype}" -o "${device_mount_opts}" "${device}" "${backing}" >/dev/null 2>&1
- then
- log_warning_msg "Could not mount persistent media ${device} (${device_fstype})"
- fi
+ continue
fi
+
local include_list="${backing}/${persistence_list}"
if [ ! -r "${include_list}" ]
then
- umount "${backing}" >/dev/null 2>&1
- rmdir "${backing}" >/dev/null 2>&1
- if /sbin/cryptsetup status ${device_name} >/dev/null 2>&1
- then
- /sbin/cryptsetup luksClose "${device_name}"
- fi
continue
fi
- [ "${DEBUG}" = "Yes" ] && cp ${include_list} ${persistent_backing}/${persistence_list}.${device_name}
- while read source dest options # < ${include_list}
+ if [ -n "${DEBUG}" ] && [ -e "${include_list}" ]
+ then
+ cp ${include_list} ${rootmnt}/live/persistent/${persistence_list}.${device_name}
+ fi
+
+ while read dir options # < ${include_list}
do
- if echo ${source} | grep -qe "^[[:space:]]*\(#.*\)\?$"
+ if echo ${dir} | grep -qe "^[[:space:]]*\(#.*\)\?$"
then
# skipping empty or commented lines
continue
fi
- if echo ${dest} | grep -qe "^[^/]"
- then
- options="${dest}"
- dest="${source}"
- elif [ -z "${dest}" ]
+ if trim_path ${dir} | grep -q -e "^[^/]" -e "^/$" -e "^/live\(/.*\)\?$" -e "^/\(.*/\)\?\.\.\?\(/.*\)\?$"
then
- dest="${source}"
- fi
-
- if echo ${dest} | grep -qe "^/\+$\|^/\+live\(/.*\)\?$"
- then
- # mounting on / or /live could cause trouble
- log_warning_msg "Skipping unsafe custom mount on ${dest}"
+ log_warning_msg "Skipping unsafe custom mount ${dir}: must be an absolute path containing neither the \".\" nor \"..\" special dirs, and cannot be \"/live\" (or any sub-directory therein) or \"/\" (for the latter, use ${root_overlay_label}-type persistence)"
continue
fi
+ local opt_source=""
+ local opt_linkfiles=""
for opt in $(echo ${options} | tr ',' ' ');
do
case "${opt}" in
- linkfiles|union)
+ source=*)
+ opt_source=${opt#source=}
+ ;;
+ linkfiles)
+ opt_linkfiles="yes"
+ ;;
+ union)
;;
*)
log_warning_msg "Skipping custom mount with unkown option: ${opt}"
esac
done
- # FIXME: handle case: we already have /a/b in
- # $bindings added from current $device, but
- # now we find /a -- /a should replace /a/b in
- # $bindings.
-
- # FIXME: handle case: we have /a in $bindings
- # from current $device, now we find /a/b, so
- # we skip /a/b
+ local source="${dir}"
+ if [ -n "${opt_source}" ]
+ then
+ if echo ${opt_source} | grep -q -e "^/" -e "^\(.*/\)\?\.\.\?\(/.*\)\?$" && [ "${source}" != "." ]
+ then
+ log_warning_msg "Skipping unsafe custom mount with option source=${opt_source}: must be either \".\" (the media root) or a relative path w.r.t. the media root that contains neither comas, nor the special \".\" and \"..\" path components"
+ continue
+ else
+ source="${opt_source}"
+ fi
+ fi
- # ensure that no multiple-/ occur in paths
- local full_source="$(echo ${backing}/${source}/ | sed -e 's|/\+|/|g')"
- local full_dest="$(echo ${rootmnt}/${dest}/ | sed -e 's|/\+|/|g')"
- device_used="yes"
- if echo ${options} | grep -qe "\<linkfiles\>";
+ local full_source="$(trim_path ${backing}/${source})"
+ local full_dest="$(trim_path ${rootmnt}/${dir})"
+ if [ -n "${opt_linkfiles}" ]
then
- echo "${full_source} ${full_dest} ${options}" >> ${links}
+ echo "${device} ${full_source} ${full_dest} ${options}" >> ${links}
else
- echo "${full_source} ${full_dest} ${options}" >> ${bindings}
+ echo "${device} ${full_source} ${full_dest} ${options}" >> ${bindings}
fi
done < ${include_list}
-
- if [ -z "${device_used}" ]
- then
- # this device was not used for / earlier, or
- # custom mount point now, so it's useless
- umount "${backing}"
- rmdir "${backing}"
- fi
done
# We sort the list according to destination so we're sure that
# we won't hide a previous mount. We also ignore duplicate
# destinations in a more or less arbitrary way.
- [ -e "${bindings}" ] && sort -k2 -sbu ${bindings} >> ${custom_mounts} && rm ${bindings}
+ [ -e "${bindings}" ] && sort -k3 -sbu ${bindings} >> ${custom_mounts} && rm ${bindings}
# After all mounts are considered we add symlinks so they
# won't be hidden by some mount.
- [ -e "${links}" ] && sort -k2 -sbu ${links} >> ${custom_mounts} && rm ${links}
+ [ -e "${links}" ] && cat ${links} >> ${custom_mounts} && rm ${links}
+
+ # We need to make sure that no two custom mounts have the same sources
+ # or are nested; if that is the case, too much weird stuff can happen.
+ local prev_source="impossible source" # first iteration must not match
+ local prev_dest=""
+ # This sort will ensure that a source /a comes right before a source
+ # /a/b so we only need to look at the previous source
+ sort -k2 -b ${custom_mounts} |
+ while read device source dest options
+ do
+ if echo ${source} | grep -qe "^${prev_source}\(/.*\)\?$"
+ then
+ panic "Two persistent mounts have the same or nested sources: ${source} on ${dest}, and ${prev_source} on ${prev_dest}"
+ fi
+ prev_source=${source}
+ prev_dest=${dest}
+ done
}
-do_custom_mounts () {
+activate_custom_mounts ()
+{
local custom_mounts="${1}" # the ouput from get_custom_mounts()
- local rootmnt="${2}" # should be set empty post-live-boot
+ local used_devices=""
- while read source dest options # < ${custom_mounts}
+ while read device source dest options # < ${custom_mounts}
do
local opt_linkfiles=""
local opt_union=""
for opt in $(echo ${options} | tr ',' ' ');
do
- case "${opt}" in
+ case "${opt}" in
linkfiles)
opt_linkfiles="yes"
;;
esac
done
- if mountpoint -q "${dest}";
+ if [ -n "${opt_linkfiles}" ] && [ -n "${opt_union}" ]
+ then
+ log_warning_msg "Skipping custom mount ${dest} with options ${options}: \"linkfiles\" and \"union\" are mutually exclusive options"
+ fi
+
+ if [ -n "$(what_is_mounted_on "${dest}")" ]
then
- log_warning_msg "Skipping custom mount ${source} on ${dest}: destination is already a mount point"
+ log_warning_msg "Skipping custom mount ${dest}: $(what_is_mounted_on "${dest}") is already mounted there"
continue
fi
# FIXME: this should really be handled by
# live-config since we don't know for sure
# which uid a certain user has until then
- if echo ${dest} | grep -qe "^${rootmnt}/*home/\+[^/]\+"
+ if trim_path ${dest} | grep -qe "^${rootmnt}/*home/[^/]\+"
then
path="/"
for dir in $(echo ${dest} | sed -e 's|/\+| |g')
# dealing with /etc or other system dir.
if [ ! -d "${source}" ]
then
- if [ -n "${PERSISTENT_READONLY}" ] || [ -n "${opt_linkfiles}" ]
+ if [ -n "${PERSISTENT_READONLY}" ]
then
continue
- elif [ -n "${opt_union}" ]
+ elif [ -n "${opt_union}" ] || [ -n "${opt_linkfiles}" ]
then
- # union's don't need to be bootstrapped
- mkdir "${source}"
+ # unions and don't need to be bootstrapped
+ # linkfiles dirs can't be bootstrapped in a sensible way
+ mkdir -p "${source}"
+ chown --reference "${dest}" "${source}"
+ chmod --reference "${dest}" "${source}"
else
# ensure that $dest is not copied *into* $source
mkdir -p "$(dirname ${source})"
fi
fi
+ # XXX: If CONFIG_AUFS_ROBR is added to the Debian kernel we can
+ # ignore the loop below and set rofs_dest_backing=$dest
rofs_dest_backing=""
for d in ${rootmnt}/live/rofs/*
do
rofs_dest_backing="${d}/$(echo ${dest} | sed -e "s|${rootmnt}||")"
else
rofs_dest_backing="${d}/${dest}"
-
fi
if [ -d "${rofs_dest_backing}" ]
then
else
cow_dir="/live/cow/${dest}"
fi
+ if [ -e "${cow_dir}" ]
+ then
+ # If an earlier custom mount has files here
+ # it will "block" the current mount's files
+ # which is undesirable
+ rm -rf "${cow_dir}"
+ fi
mkdir -p ${cow_dir}
+ chown --reference "${source}" "${cow_dir}"
+ chmod --reference "${source}" "${cow_dir}"
do_union ${dest} ${cow_dir} ${source} ${rofs_dest_backing}
fi
PERSISTENCE_IS_ON="1"
export PERSISTENCE_IS_ON
+
+ if echo ${used_devices} | grep -qve "^\(.* \)\?${device}\( .*\)\?$"
+ then
+ used_devices="${used_devices} ${device}"
+ fi
done < ${custom_mounts}
+
+ echo ${used_devices}
}
fix_home_rw_compatibility ()
return
fi
- local backing="$(where_is_mounted ${device})"
+ local backing="$(mount_persistent_media ${device})"
if [ -z "${backing}" ]
then
- backing="${rootmnt}/live/persistent/$(basename ${device})"
- mkdir -p "${backing}"
- local device_fstype="$(get_fstype ${device})"
- local device_mount_opts="rw,noatime"
- if ! mount -t "${device_fstype}" -o "${device_mount_opts}" "${device}" "${backing}" >/dev/null 2>&1
- then
return
fi
if [ ! -r "${include_list}" ]
then
echo "# home-rw backwards compatibility:
-. /home" > "${include_list}"
+/home source=." > "${include_list}"
fi
}
projects / live-boot-grml.git / blobdiff