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#!/bin/sh
# shellcheck disable=SC2034
command -v getarg >/dev/null || . /lib/dracut-lib.sh || . /usr/lib/dracut/modules.d/99base/dracut-lib.sh
command -v getargbool >/dev/null || {
# Compatibility with older Dracut versions.
# With apologies to the Dracut developers.
getargbool() {
_default="$1"; shift
! _b=$(getarg "$@") && [ -z "$_b" ] && _b="$_default"
if [ -n "$_b" ]; then
[ "$_b" = "0" ] && return 1
[ "$_b" = "no" ] && return 1
[ "$_b" = "off" ] && return 1
fi
return 0
}
}
TAB=" "
ZPOOL_IMPORT_OPTS=
if getargbool 0 zfs_force -y zfs.force -y zfsforce; then
warn "ZFS: Will force-import pools if necessary."
ZPOOL_IMPORT_OPTS=-f
fi
_mount_dataset_cb() {
# shellcheck disable=SC2154
mount -o zfsutil -t zfs "${1}" "${NEWROOT}${2}"
}
# mount_dataset DATASET
# mounts the given zfs dataset.
mount_dataset() {
dataset="${1}"
mountpoint="$(zfs get -H -o value mountpoint "${dataset}")"
ret=0
# We need zfsutil for non-legacy mounts and not for legacy mounts.
if [ "${mountpoint}" = "legacy" ] ; then
mount -t zfs "${dataset}" "${NEWROOT}" || ret=$?
else
mount -o zfsutil -t zfs "${dataset}" "${NEWROOT}" || ret=$?
if [ "$ret" = "0" ]; then
for_relevant_root_children "${dataset}" _mount_dataset_cb || ret=$?
fi
fi
return "${ret}"
}
# for_relevant_root_children DATASET EXEC
# Runs "EXEC dataset mountpoint" for all children of DATASET that are needed for system bringup
# Used by zfs-generator.sh and friends, too!
for_relevant_root_children() {
dataset="${1}"
exec="${2}"
zfs list -t filesystem -Ho name,mountpoint,canmount -r "${dataset}" |
(
_ret=0
while IFS="${TAB}" read -r dataset mountpoint canmount; do
[ "$canmount" != "on" ] && continue
case "$mountpoint" in
/etc|/bin|/lib|/lib??|/libx32|/usr)
# If these aren't mounted we may not be able to get to the real init at all, or pollute the dataset holding the rootfs
"${exec}" "${dataset}" "${mountpoint}" || _ret=$?
;;
*)
# Up to the real init to remount everything else it might need
;;
esac
done
exit "${_ret}"
)
}
# Parse root=, rootfstype=, return them decoded and normalised to zfs:AUTO for auto, plain dset for explicit
#
# True if ZFS-on-root, false if we shouldn't
#
# Supported values:
# root=
# root=zfs
# root=zfs:
# root=zfs:AUTO
#
# root=ZFS=data/set
# root=zfs:data/set
# root=zfs:ZFS=data/set (as a side-effect; allowed but undocumented)
#
# rootfstype=zfs AND root=data/set <=> root=data/set
# rootfstype=zfs AND root= <=> root=zfs:AUTO
#
# '+'es in explicit dataset decoded to ' 's.
decode_root_args() {
if [ -n "$rootfstype" ]; then
[ "$rootfstype" = zfs ]
return
fi
root=$(getarg root=)
rootfstype=$(getarg rootfstype=)
# shellcheck disable=SC2249
case "$root" in
""|zfs|zfs:|zfs:AUTO)
root=zfs:AUTO
rootfstype=zfs
return 0
;;
ZFS=*|zfs:*)
root="${root#zfs:}"
root="${root#ZFS=}"
root=$(echo "$root" | tr '+' ' ')
rootfstype=zfs
return 0
;;
esac
if [ "$rootfstype" = "zfs" ]; then
case "$root" in
"") root=zfs:AUTO ;;
*) root=$(echo "$root" | tr '+' ' ') ;;
esac
return 0
fi
return 1
}
|
