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#!/bin/bash
is_mpath() {
local _dev=$1
[ -e /sys/dev/block/"$_dev"/dm/uuid ] || return 1
[[ $(cat /sys/dev/block/"$_dev"/dm/uuid) =~ mpath- ]] && return 0
return 1
}
majmin_to_mpath_dev() {
local _dev
for i in /dev/mapper/*; do
[[ $i == /dev/mapper/control ]] && continue
_dev=$(get_maj_min "$i")
if [ "$_dev" = "$1" ]; then
echo "$i"
return
fi
done
}
# called by dracut
check() {
local _any_mpath_dev
# if there's no multipath binary, no go.
require_binaries multipath || return 1
require_binaries kpartx || return 1
for_each_host_dev_and_slaves is_mpath
_any_mpath_dev=$?
[[ $hostonly ]] || [[ $mount_needs ]] && {
[[ $_any_mpath_dev == 0 ]] || return 255
}
if [[ $_any_mpath_dev != 0 ]] && [[ ! -f /etc/multipath.conf ]]; then
return 255
fi
return 0
}
# called by dracut
depends() {
echo rootfs-block
echo dm
return 0
}
# called by dracut
cmdline() {
for m in scsi_dh_alua scsi_dh_emc scsi_dh_rdac dm_multipath; do
if grep -m 1 -q "$m" /proc/modules; then
printf 'rd.driver.pre=%s ' "$m"
fi
done
}
# called by dracut
installkernel() {
local _arch=${DRACUT_ARCH:-$(uname -m)}
local _funcs='scsi_register_device_handler|dm_dirty_log_type_register|dm_register_path_selector|dm_register_target'
if [ "$_arch" = "s390" ] || [ "$_arch" = "s390x" ]; then
_s390drivers="=drivers/s390/scsi"
fi
hostonly='' dracut_instmods -o -s "$_funcs" "=drivers/scsi" "=drivers/md" ${_s390drivers:+"$_s390drivers"}
}
mpathconf_installed() {
command -v mpathconf &> /dev/null
}
# called by dracut
install() {
local -A _allow
local config_dir
# shellcheck disable=SC2317 # called later by for_each_host_dev_and_slaves
add_hostonly_mpath_conf() {
if is_mpath "$1"; then
local _dev
_dev=$(majmin_to_mpath_dev "$1")
[ -z "$_dev" ] && return
_allow["$_dev"]="$_dev"
fi
}
local k v
while read -r k v; do
if [[ $k == "config_dir" ]]; then
v="${v#\"}"
config_dir="${v%\"}"
break
fi
done < <(multipath -t 2> /dev/null)
[[ -d $config_dir ]] || config_dir=/etc/multipath/conf.d
inst_multiple \
pkill \
kpartx \
dmsetup \
multipath \
multipathd
inst_multiple -o \
mpath_wait \
mpathconf \
mpathpersist \
xdrgetprio \
xdrgetuid \
/etc/xdrdevices.conf \
/etc/multipath.conf \
/etc/multipath/* \
"$config_dir"/* \
"$tmpfilesdir/multipath.conf"
mpathconf_installed \
&& [[ $hostonly ]] && [[ $hostonly_mode == "strict" ]] && {
for_each_host_dev_and_slaves_all add_hostonly_mpath_conf
if ((${#_allow[@]} > 0)); then
local -a _args
local _dev
for _dev in "${_allow[@]}"; do
_args+=("--allow" "$_dev")
done
mpathconf "${_args[@]}" --outfile "${initdir}"/etc/multipath.conf
fi
}
inst "$(command -v partx)" /sbin/partx
inst_libdir_file "libmultipath*" "multipath/*"
inst_libdir_file 'libgcc_s.so*'
if [[ $hostonly_cmdline == "yes" ]]; then
local _conf
_conf=$(cmdline)
[[ $_conf ]] && echo "$_conf" >> "${initdir}/etc/cmdline.d/90multipath.conf"
fi
if dracut_module_included "systemd"; then
if mpathconf_installed; then
inst_simple "${moddir}/multipathd-configure.service" "${systemdsystemunitdir}/multipathd-configure.service"
$SYSTEMCTL -q --root "$initdir" enable multipathd-configure.service
fi
inst_simple "${moddir}/multipathd.service" "${systemdsystemunitdir}/multipathd.service"
$SYSTEMCTL -q --root "$initdir" enable multipathd.service
else
inst_hook pre-trigger 02 "$moddir/multipathd.sh"
inst_hook cleanup 02 "$moddir/multipathd-stop.sh"
fi
inst_hook cleanup 80 "$moddir/multipathd-needshutdown.sh"
inst_hook shutdown 20 "$moddir/multipath-shutdown.sh"
inst_rules 40-multipath.rules 56-multipath.rules \
62-multipath.rules 65-multipath.rules \
66-kpartx.rules 67-kpartx-compat.rules \
11-dm-mpath.rules 11-dm-parts.rules
}
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