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#
# WARNING: This script is parsed by ash in busybox at boot time, not bash!
# http://linux.die.net/man/1/ash
# https://wiki.ubuntu.com/DashAsBinSh
# http://www.jpsdomain.org/public/2008-JP_bash_vs_dash.pdf
#
ZPOOL_FORCE=""
ZPOOL_IMPORT_FLAGS=""
zfs_get_bootfs () {
for zfs_dataset in $(zpool list -H -o bootfs); do
case ${zfs_dataset} in
"" | "-")
# skip this line/dataset
;;
"no pools available")
return 1
;;
*)
ZFS_DATASET=${zfs_dataset}
return 0
;;
esac
done
return 1
}
zfs_decrypt_fs() {
dataset=$1
# check if 'zfs load-key' is available
zfs 2>&1 | grep load-key > /dev/null || return 0
# check if dataset is encrypted
[ "$(zfs get -H -o value encryption "${dataset}")" != "off" ] || return 0
# check if key is already loaded
[ "$(zfs get -H -o value keystatus "${dataset}")" != "available" ] || return 0
# get the encryption root
encryptionroot=$(zfs get -H -o value encryptionroot "${dataset}")
# export encription root to be used by other hooks (SSH)
echo "${encryptionroot}" > /.encryptionroot
# loop until we get the correct password or key is unlocked by another vector (SSH for instance)
# while [ "$(zfs get -H -o value keystatus "${encryptionroot}")" != "available" ] &&
# ! eval zfs load-key "${encryptionroot}"; do
# sleep 2
# done
# finally load the key
plymouth ask-for-password --prompt="Password for ${dataset} dataset" --dont-pause-progress --number-of-tries=5 --command="zfs load-key ${encryptionroot}"
# retry if key wasn't loaded
[ "$(zfs get -H -o value keystatus "${dataset}")" != "available" ] && zfs_decrypt_fs "${dataset}"
if [ -f /.encryptionroot ]; then
rm /.encryptionroot
fi
}
zfs_mount_handler () {
if [ "${ZFS_DATASET}" = "bootfs" ] ; then
if ! zfs_get_bootfs ; then
# Lets import everything and try again
zpool import ${ZPOOL_IMPORT_FLAGS} -N -a ${ZPOOL_FORCE}
if ! zfs_get_bootfs ; then
err "ZFS: Cannot find bootfs."
exit 1
fi
fi
fi
local pool="${ZFS_DATASET%%/*}"
local rwopt_exp="${rwopt:-ro}"
if ! zpool list -H "${pool}" 2>1 > /dev/null ; then
if [ ! "${rwopt_exp}" = "rw" ]; then
msg "ZFS: Importing pool ${pool} readonly."
ZPOOL_IMPORT_FLAGS="${ZPOOL_IMPORT_FLAGS} -o readonly=on"
else
msg "ZFS: Importing pool ${pool}."
fi
if ! zpool import ${ZPOOL_IMPORT_FLAGS} -N "${pool}" ${ZPOOL_FORCE} ; then
err "ZFS: Unable to import pool ${pool}."
exit 1
fi
fi
local node="$1"
local rootmnt=$(zfs get -H -o value mountpoint "${ZFS_DATASET}")
local tab_file="${node}/etc/fstab"
local zfs_datasets="$(zfs list -H -o name -t filesystem -r ${ZFS_DATASET})"
# Mount the root, and any child datasets
for dataset in ${zfs_datasets}; do
mountpoint=$(zfs get -H -o value mountpoint "${dataset}")
canmount=$(zfs get -H -o value canmount "${dataset}")
# skip dataset
[ ${canmount} = "off" -o ${mountpoint} = "none" ] && continue
if [ ${mountpoint} = "legacy" ]; then
if [ -f "${tab_file}" ]; then
if findmnt -snero source -F "${tab_file}" -S "${dataset}" > /dev/null 2>&1; then
opt=$(findmnt -snero options -F "${tab_file}" -S "${dataset}")
mnt=$(findmnt -snero target -F "${tab_file}" -S "${dataset}")
zfs_decrypt_fs "${dataset}"
mount -t zfs -o "${opt}" "${dataset}" "${node}${mnt}"
fi
fi
else
zfs_decrypt_fs "${dataset}"
mount -t zfs -o "zfsutil,${rwopt_exp}" "${dataset}" "${node}/${mountpoint##${rootmnt}}"
fi
done
}
set_flags() {
# Force import the pools, useful if the pool has not properly been exported using 'zpool export <pool>'
[ ! "${zfs_force}" = "" ] && ZPOOL_FORCE="-f"
# Add import directory to import command flags
[ ! "${zfs_import_dir}" = "" ] && ZPOOL_IMPORT_FLAGS="${ZPOOL_IMPORT_FLAGS} -d ${zfs_import_dir}"
[ "${zfs_import_dir}" = "" ] && [ -f /etc/zfs/zpool.cache.org ] && ZPOOL_IMPORT_FLAGS="${ZPOOL_IMPORT_FLAGS} -c /etc/zfs/zpool.cache.org"
}
run_hook() {
set_flags
# Wait 15 seconds for ZFS devices to show up
[ "${zfs_wait}" = "" ] && ZFS_WAIT="15" || ZFS_WAIT="${zfs_wait}"
case ${root} in
# root=zfs
"zfs")
mount_handler="zfs_mount_handler"
;;
# root=ZFS=... syntax (grub)
"ZFS="*)
mount_handler="zfs_mount_handler"
ZFS_DATASET="${root#*[=]}"
;;
esac
case ${zfs} in
"")
# skip this line/dataset
;;
auto|bootfs)
ZFS_DATASET="bootfs"
mount_handler="zfs_mount_handler"
local pool="[a-zA-Z][^ ]*"
;;
*)
ZFS_DATASET="${zfs}"
mount_handler="zfs_mount_handler"
local pool="${ZFS_DATASET%%/*}"
;;
esac
# Allow at least n seconds for zfs device to show up. Especially
# when using zfs_import_dir instead of zpool.cache, the listing of
# available pools can be slow, so this loop must be top-tested to
# ensure we do one 'zpool import' pass after the timer has expired.
sleep ${ZFS_WAIT} & pid=$!
local break_after=0
while :; do
kill -0 $pid > /dev/null 2>&1 || break_after=1
if [ -c "/dev/zfs" ]; then
zpool import ${ZPOOL_IMPORT_FLAGS} | awk "
BEGIN { pool_found=0; online=0; unavail=0 }
/^ ${pool} .*/ { pool_found=1 }
/^\$/ { pool_found=0 }
/UNAVAIL/ { if (pool_found == 1) { unavail=1 } }
/ONLINE/ { if (pool_found == 1) { online=1 } }
END { if (online == 1 && unavail != 1)
{ exit 0 }
else
{ exit 1 }
}" && break
fi
[ $break_after == 1 ] && break
sleep 1
done
kill $pid > /dev/null 2>&1
}
run_latehook () {
set_flags
# only run zpool import, if flags were set (cache file found / zfs_import_dir specified)
[ ! "${ZPOOL_IMPORT_FLAGS}" = "" ] && zpool import ${ZPOOL_IMPORT_FLAGS} -N -a ${ZPOOL_FORCE}
}
# vim:set ts=4 sw=4 ft=sh et:
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