modules.d/95iscsi/module-setup.sh

   1 #!/bin/bash
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4
   5 check() {
   6     local _rootdev
   7     # If our prerequisites are not met, fail anyways.
   8     type -P iscsistart hostname iscsi-iname >/dev/null || return 1
   9
  10     # If hostonly was requested, fail the check if we are not actually
  11     # booting from root.
  12
  13     is_iscsi() (
  14         local _dev=$1
  15
  16         [[ -L /sys/dev/block/$_dev ]] || return
  17         cd "$(readlink -f /sys/dev/block/$_dev)"
  18         until [[ -d sys || -d iscsi_session ]]; do
  19             cd ..
  20         done
  21         [[ -d iscsi_session ]]
  22     )
  23
  24     [[ $hostonly ]] || [[ $mount_needs ]] && {
  25         for_each_host_dev_and_slaves is_iscsi || return 1
  26     }
  27     return 0
  28 }
  29
  30 depends() {
  31     echo network rootfs-block
  32 }
  33
  34 installkernel() {
  35     local _arch=$(uname -m)
  36
  37     instmods iscsi_tcp iscsi_ibft crc32c bnx2i iscsi_boot_sysfs qla4xxx cxgb3i cxgb4i be2iscsi
  38     iscsi_module_filter() {
  39         local _funcs='iscsi_register_transport'
  40         # subfunctions inherit following FDs
  41         local _merge=8 _side2=9
  42         function bmf1() {
  43             local _f
  44             while read _f; do
  45                 case "$_f" in
  46                     *.ko)    [[ $(<         $_f) =~ $_funcs ]] && echo "$_f" ;;
  47                     *.ko.gz) [[ $(gzip -dc <$_f) =~ $_funcs ]] && echo "$_f" ;;
  48                     *.ko.xz) [[ $(xz -dc   <$_f) =~ $_funcs ]] && echo "$_f" ;;
  49                 esac
  50             done
  51             return 0
  52         }
  53
  54         function rotor() {
  55             local _f1 _f2
  56             while read _f1; do
  57                 echo "$_f1"
  58                 if read _f2; then
  59                     echo "$_f2" 1>&${_side2}
  60                 fi
  61             done | bmf1 1>&${_merge}
  62             return 0
  63         }
  64         # Use two parallel streams to filter alternating modules.
  65         set +x
  66         eval "( ( rotor ) ${_side2}>&1 | bmf1 ) ${_merge}>&1"
  67         [[ $debug ]] && set -x
  68         return 0
  69     }
  70
  71     { find_kernel_modules_by_path drivers/scsi; if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then find_kernel_modules_by_path drivers/s390/scsi; fi;} \
  72     | iscsi_module_filter  |  instmods
  73 }
  74
  75 install() {
  76     dracut_install umount iscsistart hostname iscsi-iname
  77     dracut_install -o iscsiuio
  78     inst_hook cmdline 90 "$moddir/parse-iscsiroot.sh"
  79     inst_hook cleanup 90 "$moddir/cleanup-iscsi.sh"
  80     inst "$moddir/iscsiroot.sh" "/sbin/iscsiroot"
  81     if ! dracut_module_included "systemd"; then
  82         inst "$moddir/mount-lun.sh" "/bin/mount-lun.sh"
  83     fi
  84     dracut_need_initqueue
  85 }