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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 "${dataset}")" != "off" ] || return 0
# get the encryption root
encryptionroot=$(zfs get -H -o value encryptionroot "${dataset}")
# check if key is already loaded
[ "$(zfs get -H -o value encryption "${dataset}")" != "available" ] || return 0
# finally load the key
plymouth ask-for-password --prompt="Password for ${dataset} dataset" --dont-pause-progress --number-of-tries=5 --command="zfs load-key ${encryptionroot}"
}
zfs_mount_handler () {
if [ "${ZFS_DATASET}" = "bootfs" ] ; then
if ! zfs_get_bootfs ; then
# Lets import everything and try again
zpool import ${ZPOOL_IMPORT_FLAGS} -N -a ${ZPOOL_FORCE}
if ! zfs_get_bootfs ; then
die "ZFS: Cannot find bootfs."
fi
fi
fi
local pool="${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
die "ZFS: Unable to import pool ${pool}."
fi
fi
local node="$1"
local tab_file="${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}")
case ${mountpoint} in
"none")
# skip this line/dataset.
;;
"legacy")
if [ -f "${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}${mnt}"
fi
fi
;;
*)
zfs_decrypt_fs "${dataset}"
mount -t zfs -o "zfsutil,${rwopt_exp}" "${dataset}" "${node}${mountpoint}"
;;
esac
done
}
run_hook() {
# 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 ${zfs_import_dir}"
# Wait 15 seconds for ZFS devices to show up
[ "${zfs_wait}" = "" ] && ZFS_WAIT="15" || ZFS_WAIT="${zfs_wait}"
[ "${root}" = "zfs" ] && mount_handler="zfs_mount_handler"
case ${zfs} in
"")
# skip this line/dataset
;;
auto|bootfs)
ZFS_DATASET="bootfs"
mount_handler="zfs_mount_handler"
;;
*)
ZFS_DATASET="${zfs}"
mount_handler="zfs_mount_handler"
;;
esac
# Allow up to n seconds for zfs device to show up
for i in $(seq 1 ${ZFS_WAIT}); do
[ -c "/dev/zfs" ] && break
sleep 1
done
}
run_latehook () {
zpool import -N -a ${ZPOOL_FORCE}
}
# vim:set ts=4 sw=4 ft=sh et:
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