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 # called by dracut
   6 check() {
   7     local _rootdev
   8     # If our prerequisites are not met, fail anyways.
   9     require_binaries iscsistart hostname iscsi-iname || return 1
  10
  11     # If hostonly was requested, fail the check if we are not actually
  12     # booting from root.
  13
  14     is_iscsi() {
  15         local _dev=$1
  16
  17         [[ -L "/sys/dev/block/$_dev" ]] || return
  18         cd "$(readlink -f "/sys/dev/block/$_dev")"
  19         until [[ -d sys || -d iscsi_session ]]; do
  20             cd ..
  21         done
  22         [[ -d iscsi_session ]]
  23     }
  24
  25     [[ $hostonly ]] || [[ $mount_needs ]] && {
  26         pushd . >/dev/null
  27         for_each_host_dev_and_slaves is_iscsi || return 255
  28         popd >/dev/null
  29     }
  30     return 0
  31 }
  32
  33 # called by dracut
  34 depends() {
  35     echo network rootfs-block
  36 }
  37
  38 # called by dracut
  39 installkernel() {
  40     local _arch=$(uname -m)
  41
  42     instmods bnx2i qla4xxx cxgb3i cxgb4i be2iscsi
  43     hostonly="" instmods iscsi_tcp iscsi_ibft crc32c iscsi_boot_sysfs
  44     iscsi_module_filter() {
  45         local _funcs='iscsi_register_transport'
  46         # subfunctions inherit following FDs
  47         local _merge=8 _side2=9
  48         function bmf1() {
  49             local _f
  50             while read _f; do
  51                 case "$_f" in
  52                     *.ko)    [[ $(<         $_f) =~ $_funcs ]] && echo "$_f" ;;
  53                     *.ko.gz) [[ $(gzip -dc <$_f) =~ $_funcs ]] && echo "$_f" ;;
  54                     *.ko.xz) [[ $(xz -dc   <$_f) =~ $_funcs ]] && echo "$_f" ;;
  55                 esac
  56             done
  57             return 0
  58         }
  59
  60         function rotor() {
  61             local _f1 _f2
  62             while read _f1; do
  63                 echo "$_f1"
  64                 if read _f2; then
  65                     echo "$_f2" 1>&${_side2}
  66                 fi
  67             done | bmf1 1>&${_merge}
  68             return 0
  69         }
  70         # Use two parallel streams to filter alternating modules.
  71         set +x
  72         eval "( ( rotor ) ${_side2}>&1 | bmf1 ) ${_merge}>&1"
  73         [[ $debug ]] && set -x
  74         return 0
  75     }
  76
  77     { find_kernel_modules_by_path drivers/scsi; if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then find_kernel_modules_by_path drivers/s390/scsi; fi;} \
  78     | iscsi_module_filter  |  instmods
  79 }
  80
  81 # called by dracut
  82 install() {
  83     inst_multiple umount iscsistart hostname iscsi-iname
  84     inst_multiple -o iscsiuio
  85     inst_hook cmdline 90 "$moddir/parse-iscsiroot.sh"
  86     inst_hook cleanup 90 "$moddir/cleanup-iscsi.sh"
  87     inst "$moddir/iscsiroot.sh" "/sbin/iscsiroot"
  88     if ! dracut_module_included "systemd"; then
  89         inst "$moddir/mount-lun.sh" "/bin/mount-lun.sh"
  90     fi
  91     dracut_need_initqueue
  92 }