modules.d/90multipath/module-setup.sh

   1 #!/bin/bash
   2
   3 is_mpath() {
   4     local _dev=$1
   5     [ -e /sys/dev/block/$_dev/dm/uuid ] || return 1
   6     [[ $(cat /sys/dev/block/$_dev/dm/uuid) =~ mpath- ]] && return 0
   7     return 1
   8 }
   9
  10 majmin_to_mpath_dev() {
  11     local _dev
  12     for i in /dev/mapper/*; do
  13         [[ $i == /dev/mapper/control ]] && continue
  14         _dev=$(get_maj_min $i)
  15         if [ "$_dev" = "$1" ]; then
  16             echo $i
  17             return
  18         fi
  19     done
  20 }
  21
  22 # called by dracut
  23 check() {
  24     local _rootdev
  25
  26     [[ $hostonly ]] || [[ $mount_needs ]] && {
  27         for_each_host_dev_and_slaves is_mpath || return 255
  28     }
  29
  30     # if there's no multipath binary, no go.
  31     require_binaries multipath || return 1
  32
  33     return 0
  34 }
  35
  36 # called by dracut
  37 depends() {
  38     echo rootfs-block
  39     echo dm
  40     return 0
  41 }
  42
  43 # called by dracut
  44 cmdline() {
  45     for m in scsi_dh_alua scsi_dh_emc scsi_dh_rdac dm_multipath; do
  46         if grep -m 1 -q "$m" /proc/modules ; then
  47             printf 'rd.driver.pre=%s ' "$m"
  48         fi
  49     done
  50 }
  51
  52 # called by dracut
  53 installkernel() {
  54     local _ret
  55     local _arch=$(uname -m)
  56     local _funcs='scsi_register_device_handler|dm_dirty_log_type_register|dm_register_path_selector|dm_register_target'
  57     local _s390
  58
  59     if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then
  60         _s390drivers="=drivers/s390/scsi"
  61     fi
  62
  63     hostonly='' dracut_instmods -o -s "$_funcs" "=drivers/scsi" "=drivers/md" ${_s390drivers:+"$_s390drivers"}
  64 }
  65
  66 # called by dracut
  67 install() {
  68     local _f _allow
  69
  70     add_hostonly_mpath_conf() {
  71         is_mpath $1 && {
  72             local _dev
  73
  74             _dev=$(majmin_to_mpath_dev $1)
  75             [ -z "$_dev" ] && return
  76             strstr "$_allow" "$_dev" && return
  77             _allow="$_allow --allow $_dev"
  78         }
  79     }
  80
  81     inst_multiple -o  \
  82         dmsetup \
  83         kpartx \
  84         mpath_wait \
  85         multipath  \
  86         multipathd \
  87         mpathpersist \
  88         xdrgetuid \
  89         xdrgetprio \
  90         /etc/xdrdevices.conf \
  91         /etc/multipath.conf \
  92         /etc/multipath/* \
  93         /etc/multipath/conf.d/*
  94
  95     [[ $hostonly ]] && [[ $hostonly_mode = "strict" ]] && {
  96         for_each_host_dev_and_slaves_all add_hostonly_mpath_conf
  97         [ -n "$_allow" ] && mpathconf $_allow --outfile ${initdir}/etc/multipath.conf
  98     }
  99
 100     inst $(command -v partx) /sbin/partx
 101
 102     inst_libdir_file "libmultipath*" "multipath/*"
 103     inst_libdir_file 'libgcc_s.so*'
 104
 105     if [[ $hostonly_cmdline ]] ; then
 106         local _conf=$(cmdline)
 107         [[ $_conf ]] && echo "$_conf" >> "${initdir}/etc/cmdline.d/90multipath.conf"
 108     fi
 109
 110     if dracut_module_included "systemd"; then
 111         inst_simple "${moddir}/multipathd.service" "${systemdsystemunitdir}/multipathd.service"
 112         mkdir -p "${initdir}${systemdsystemunitdir}/sysinit.target.wants"
 113         ln -rfs "${initdir}${systemdsystemunitdir}/multipathd.service" "${initdir}${systemdsystemunitdir}/sysinit.target.wants/multipathd.service"
 114     else
 115         inst_hook pre-trigger 02 "$moddir/multipathd.sh"
 116         inst_hook cleanup   02 "$moddir/multipathd-stop.sh"
 117     fi
 118
 119     inst_hook cleanup   80 "$moddir/multipathd-needshutdown.sh"
 120     inst_hook shutdown  20 "$moddir/multipath-shutdown.sh"
 121
 122     inst_rules 40-multipath.rules 56-multipath.rules \
 123         62-multipath.rules 65-multipath.rules \
 124         66-kpartx.rules 67-kpartx-compat.rules \
 125         11-dm-mpath.rules
 126 }
 127