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

   1 #!/bin/bash
   2
   3 # called by dracut
   4 check() {
   5     local _rootdev
   6     # If our prerequisites are not met, fail anyways.
   7     require_binaries iscsistart hostname iscsi-iname || return 1
   8
   9     # If hostonly was requested, fail the check if we are not actually
  10     # booting from root.
  11
  12     is_iscsi() {
  13         local _dev=$1
  14
  15         [[ -L "/sys/dev/block/$_dev" ]] || return
  16         cd "$(readlink -f "/sys/dev/block/$_dev")"
  17         until [[ -d sys || -d iscsi_session ]]; do
  18             cd ..
  19         done
  20         [[ -d iscsi_session ]]
  21     }
  22
  23     [[ $hostonly ]] || [[ $mount_needs ]] && {
  24         pushd . >/dev/null
  25         for_each_host_dev_and_slaves is_iscsi || return 255
  26         popd >/dev/null
  27     }
  28     return 0
  29 }
  30
  31 get_ibft_mod() {
  32     local ibft_mac=$1
  33     local iface_mac iface_mod
  34     # Return the iSCSI offload module for a given MAC address
  35     for iface_desc in $(iscsiadm -m iface | cut -f 2 -d ' '); do
  36         iface_mod=${iface_desc%%,*}
  37         iface_mac=${iface_desc#*,}
  38         iface_mac=${iface_mac%%,*}
  39         if [ "$ibft_mac" = "$iface_mac" ] ; then
  40             echo $iface_mod
  41             return 0
  42         fi
  43     done
  44 }
  45
  46 install_ibft() {
  47     # When iBFT / iscsi_boot is detected:
  48     # - Use 'ip=ibft' to set up iBFT network interface
  49     #   Note: bnx2i is using a different MAC address of iSCSI offloading
  50     #         so the 'ip=ibft' parameter must not be set
  51     # - specify firmware booting cmdline parameter
  52
  53     for d in /sys/firmware/* ; do
  54         if [ -d ${d}/ethernet0 ] ; then
  55             read ibft_mac < ${d}/ethernet0/mac
  56             ibft_mod=$(get_ibft_mod $ibft_mac)
  57         fi
  58         if [ -z "$ibft_mod" ] && [ -d ${d}/ethernet1 ] ; then
  59             read ibft_mac < ${d}/ethernet1/mac
  60             ibft_mod=$(get_ibft_mod $ibft_mac)
  61         fi
  62         if [ -d ${d}/initiator ] ; then
  63             if [ ${d##*/} = "ibft" ] && [ "$ibft_mod" != "bnx2i" ] ; then
  64                 echo -n "ip=ibft "
  65             fi
  66             echo -n "rd.iscsi.firmware=1"
  67         fi
  68     done
  69 }
  70
  71 install_iscsiroot() {
  72     local devpath=$1
  73     local scsi_path iscsi_lun session c d conn
  74     local iscsi_session iscsi_address iscsi_port iscsi_targetname iscsi_tpgt
  75
  76     scsi_path=${devpath%%/block*}
  77     [ "$scsi_path" = "$devpath" ] && return 1
  78     iscsi_lun=${scsi_path##*:}
  79     [ "$iscsi_lun" = "$scsi_path" ] && return 1
  80     session=${devpath%%/target*}
  81     [ "$session" = "$devpath" ] && return 1
  82     iscsi_session=${session##*/}
  83     [ "$iscsi_session" = "$session" ] && return 1
  84
  85     for d in ${session}/* ; do
  86         case $d in
  87             *connection*)
  88                 c=${d##*/}
  89                 conn=${d}/iscsi_connection/${c}
  90                 if [ -d ${conn} ] ; then
  91                     iscsi_address=$(cat ${conn}/persistent_address)
  92                     iscsi_port=$(cat ${conn}/persistent_port)
  93                 fi
  94                 ;;
  95             *session)
  96                 if [ -d ${d}/${iscsi_session} ] ; then
  97                     iscsi_initiator=$(cat ${d}/${iscsi_session}/initiatorname)
  98                     iscsi_targetname=$(cat ${d}/${iscsi_session}/targetname)
  99                 fi
 100                 ;;
 101         esac
 102     done
 103
 104     [ -z "$iscsi_address" ] && return
 105     local_address=$(ip -o route get to $iscsi_address | sed -n 's/.*src \([0-9a-f.:]*\).*/\1/p')
 106     ifname=$(ip -o route get to $iscsi_address | sed -n 's/.*dev \([^ ]*\).*/\1/p')
 107     printf 'ip=%s:static ' ${ifname}
 108
 109     if [ -e /sys/class/net/$ifname/address ] ; then
 110         ifmac=$(cat /sys/class/net/$ifname/address)
 111         printf 'ifname=%s:%s ' ${ifname} ${ifmac}
 112     fi
 113
 114     if [ -n "$iscsi_address" -a -n "$iscsi_targetname" ] ; then
 115         if [ -n "$iscsi_port" -a "$iscsi_port" -eq 3260 ] ; then
 116             iscsi_port=
 117         fi
 118         if [ -n "$iscsi_lun" -a "$iscsi_lun" -eq 0 ] ; then
 119             iscsi_lun=
 120         fi
 121         # In IPv6 case rd.iscsi.initatior= must pass address in [] brackets
 122         case "$iscsi_address" in
 123             *:*)
 124                 iscsi_address="[$iscsi_address]"
 125                 ;;
 126         esac
 127         # Must be two separate lines, so that "sort | uniq" commands later
 128         # can sort out rd.iscsi.initiator= duplicates
 129         echo "rd.iscsi.initiator=${iscsi_initiator}"
 130         echo "netroot=iscsi:${iscsi_address}::${iscsi_port}:${iscsi_lun}:${iscsi_targetname}"
 131     fi
 132     return 0
 133 }
 134
 135
 136 install_softiscsi() {
 137     [ -d /sys/firmware/ibft ] && return 0
 138
 139     is_softiscsi() {
 140         local _dev=$1
 141         local iscsi_dev
 142
 143         [[ -L "/sys/dev/block/$_dev" ]] || return
 144         iscsi_dev=$(cd -P /sys/dev/block/$_dev; echo $PWD)
 145         install_iscsiroot $iscsi_dev
 146     }
 147
 148     for_each_host_dev_and_slaves_all is_softiscsi || return 255
 149     return 0
 150 }
 151
 152 # called by dracut
 153 depends() {
 154     echo network rootfs-block
 155 }
 156
 157 # called by dracut
 158 installkernel() {
 159     local _arch=$(uname -m)
 160
 161     instmods bnx2i qla4xxx cxgb3i cxgb4i be2iscsi
 162     hostonly="" instmods iscsi_tcp iscsi_ibft crc32c iscsi_boot_sysfs
 163     iscsi_module_filter() {
 164         local _funcs='iscsi_register_transport'
 165         # subfunctions inherit following FDs
 166         local _merge=8 _side2=9
 167         function bmf1() {
 168             local _f
 169             while read _f || [ -n "$_f" ]; do
 170                 case "$_f" in
 171                     *.ko)    [[ $(<         $_f) =~ $_funcs ]] && echo "$_f" ;;
 172                     *.ko.gz) [[ $(gzip -dc <$_f) =~ $_funcs ]] && echo "$_f" ;;
 173                     *.ko.xz) [[ $(xz -dc   <$_f) =~ $_funcs ]] && echo "$_f" ;;
 174                 esac
 175             done
 176             return 0
 177         }
 178
 179         function rotor() {
 180             local _f1 _f2
 181             while read _f1 || [ -n "$_f1" ]; do
 182                 echo "$_f1"
 183                 if read _f2; then
 184                     echo "$_f2" 1>&${_side2}
 185                 fi
 186             done | bmf1 1>&${_merge}
 187             return 0
 188         }
 189         # Use two parallel streams to filter alternating modules.
 190         set +x
 191         eval "( ( rotor ) ${_side2}>&1 | bmf1 ) ${_merge}>&1"
 192         [[ $debug ]] && set -x
 193         return 0
 194     }
 195
 196     { find_kernel_modules_by_path drivers/scsi; if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then find_kernel_modules_by_path drivers/s390/scsi; fi;} \
 197     | iscsi_module_filter  |  instmods
 198 }
 199
 200 # called by dracut
 201 cmdline() {
 202     local _iscsiconf=$(install_ibft)
 203     {
 204         if [ "$_iscsiconf" ] ; then
 205             echo ${_iscsiconf}
 206         else
 207             install_softiscsi
 208         fi
 209     } | sort | uniq
 210 }
 211
 212 # called by dracut
 213 install() {
 214     inst_multiple umount iscsistart hostname iscsi-iname
 215     inst_multiple -o iscsiuio
 216     inst_libdir_file 'libgcc_s.so*'
 217
 218     # Detect iBFT and perform mandatory steps
 219     if [[ $hostonly_cmdline == "yes" ]] ; then
 220         local _iscsiconf=$(cmdline)
 221         [[ $_iscsiconf ]] && printf "%s\n" "$_iscsiconf" >> "${initdir}/etc/cmdline.d/95iscsi.conf"
 222     fi
 223
 224     inst_hook cmdline 90 "$moddir/parse-iscsiroot.sh"
 225     inst_hook cleanup 90 "$moddir/cleanup-iscsi.sh"
 226     inst "$moddir/iscsiroot.sh" "/sbin/iscsiroot"
 227     if ! dracut_module_included "systemd"; then
 228         inst "$moddir/mount-lun.sh" "/bin/mount-lun.sh"
 229     fi
 230     dracut_need_initqueue
 231 }